Shenzhen ZTRON Microelectronics Co., Ltd
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0755-8299 4126
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10-10
2022
Can a Bluetooth speaker replace a child's story machine?
Some parents of children think that using Bluetooth speakers can also replace their children's early education machines or story machines. They can just play the audio and content on the mobile phone on the Bluetooth speakers, and they can save a small amount of expenses. Why? What if you don't? But that doesn't seem to be the case. A professional children's story machine is irreplaceable.We all know that Bluetooth speakers generally need to be used with a mobile phone. If there is an incoming call or message reminder during use, the audio being played will be interrupted and paused. Children's attention The force will be transferred or walked away immediately, which will have a greater impact on cultivating children's concentration.As products for adults, mobile phones and Bluetooth speakers are generally complicated to operate and are not friendly to the elderly and children. Even if you teach the elderly at home many times, they still can't remember how to use it, let alone children. With story machines that are professionally developed and produced for children, you don't have to worry about these worries.When a mobile phone is used with a speaker, it needs to be within the network signal range. Once the mobile phone is removed or interfered with, the Bluetooth signal will be interrupted immediately, and the audio being played will also stop immediately, and the effect of children's use will be greatly reduced.Professional storytelling machines can usually be used without mobile phones, and the buttons on the body are easy to operate, making them friendly to the elderly and children. Everyone knows that a good children's product will be more stringent in terms of material selection and playback content, and it will be safer and more secure to use.Story Machine has built-in professional educational resources, covering Chinese studies, English, stories, children's songs, picture books, and knowledge sections, eliminating the trouble of searching for resources and downloading them.Zuchuang Micro Intelligent WIFI Story Machine is specially developed for each child's learning and growth. It has developed a story machine platform that is more suitable for children. Parents can use the mobile app to manage and set the content, so that children can learn while having fun. Improve learning efficiency while having fun.
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07-22
2022
What should the evaluation system for children's toys be? This article gives you the answer!
Shenzhen Zuchuang Microelectronics Co., Ltd. is a professional solutions company with experience in electronic product development and research. It specializes in children's educational electronics (thinking machines, dictionary pens, pinyin machines, Chinese learning machines, hearing aids, pocket learning machines, etc.), small home appliances It has rich experience and strong product research and development capabilities in the fields of smart toys such as control and smart home.As a solution provider with more than 20 years of experience, and also the vice president of the Shenzhen Toy Industry Association, today I would like to talk about the toy evaluation system that the founders understand.The toy evaluation system is a systematic work, which cannot be separated from the familiarity of the toy manufacturing process, the consideration of market economy and consumption concepts, and the in-depth understanding of children's group culture and psychological and physiological development.It should be considered from many aspects. These include factors such as safety, playability, functionality, dissemination, uncertainty and attractiveness. The toys here mainly refer to toys used by children, and do not take into account the figures, boxing balls, models, black technology innovative toys, etc. that adults often play with.#1 SecuritySafety is the most basic criterion for evaluating a toy. Both manufacturers and consumers should put safety first. Because if a toy is unsafe, it will cause harm to the child's body and may even cause serious consequences. Safety assessment should consider aspects such as material, design, size, strength and durability.First of all, the materials of toys should be safe and not contain poisonous or harmful substances. Toy manufacturers should use raw materials that comply with national standards, and the materials should undergo safety testing and certification to ensure that toys will not cause harm to children.Secondly, the design of toys should conform to children's physical and psychological characteristics. For example, for toys for young children, attention should be paid to the size and shape of the toys to prevent children from accidentally swallowing or eating them. For children's toys, attention should be paid to the strength and durability of the toys to prevent the toys from being easily damaged and causing injuries to children.Finally, toys should comply with national safety standards and undergo relevant certification and testing to ensure compliance with safety requirements. Manufacturers should conduct strict quality control and safety testing on each batch of products to ensure that the safety of toys can be guaranteed.#2 PlayabilityPlayability is one of the important criteria for measuring the success of a toy. It determines whether a toy can attract children's attention and interest, thereby promoting children's cognition and development. The evaluation of playability should be considered from the perspective of children, including aspects such as game play, interactivity and creativity.First of all, good toys should have a variety of different play methods to satisfy children of different ages and interests. For example, some simple puzzle games can be suitable for young children, while complex maze games can be suitable for older children.Secondly, good toys should be interactive and able to interact with children, giving them a sense of participation and achievement. For example, some interactive toys, such as puzzles and building blocks, can help children develop their collaboration and communication skills.Finally, good toys should be creative and stimulate children's creativity and imagination. For example, some art and craft toys encourage children to use their imaginations to create their own works of art.#3 FunctionalityThis is more from the perspective of the needs of Chinese parents. Good toys should help children develop a variety of skills and abilities, including cognitive, sensory, social and motor. Functional assessment should consider the needs of children of different ages and developmental stages.First of all, for toys for young children, functionality should focus on cognitive and sensory development. For example, a toy for young children can help them develop sensory skills such as language, vision, hearing, and touch, as well as recognize basic concepts such as colors, shapes, and numbers.Second, for preschoolers, functionality should focus on social and emotional development. For example, some social games and role-playing games can help them develop collaboration and communication skills, as well as understanding aspects such as emotions and emotion management.Finally, for young children, functionality should focus on motor and skill development. For example, some sports and hand-made toys can help them develop physical coordination, skills and creativity.#4 ContagiousnessThis is from the perspective of a designer or trader. Communication refers to the communication effect of toys on the brand or product image. Good toys should not only have excellent product quality and playability, but also should be able to help the brand or product establish a good image and reputation in the market. The evaluation of communication should be considered from the aspects of advertising, packaging, design and marketing.First of all, good toys should have attractive packaging and design in order to attract consumers' attention and increase the sales of the product. For example, brightly colored packaging, creative design and excellent printing quality can improve the communication effect of the product.Secondly, good toys should be consistent with the brand image and market positioning. For example, an environmentally friendly toy can help the brand establish an environmentally friendly image, while an intellectual development-oriented toy can help the brand occupy a place in the intellectual development market.Finally, a good toy should be able to attract attention and be shared on social media and other channels. For example, some creative and interesting toys can attract users' attention and sharing on social media, thereby increasing the brand's popularity and exposure.For example, the four-wheel drive, yo-yo and top can be called everyone's "three-piece childhood set". Their popularity is inseparable from the popularity of every anime. There is another very important reason. It is easy for children to carry and teachers Or parents do not object, and at the same time, it is easy to stimulate children's desire for PK, and they want to buy better ones if they lose, so its communication index is high.#5 UncertaintyUncertainty refers to whether the gameplay and results of the toy have a certain degree of randomness and uncertainty. A good toy should be able to bring a certain degree of surprise and challenge, while also maintaining a certain degree of controllability and safety. The evaluation of uncertainty should be considered from the aspects of game rules, difficulty and safety.First of all, good toys should be difficult and challenging enough to stimulate children's interest and motivation. For example, some educational games can help children exercise their thinking and problem-solving skills.Secondly, a good toy should have a certain degree of uncertainty and randomness, and can bring a certain degree of surprise and fun. For example, with Lego, children can use the same building blocks to build airplanes, cars, tanks, etc. in their imagination. Plasticine also counts. One product can bring different rewards and results, thereby increasing the fun and excitement of the game.Finally, good toys need to maintain a certain level of safety and controllability. For example, some toys that require batteries or recharging need to meet safety standards and also need to provide safety warnings and instructions for use.#6 AttractionAttraction refers to the attractiveness and temptation of a toy to the target consumer group. Good toys should be able to attract consumers' attention and desire to buy, and they should also meet market demand and consumer trends.First of all, this can be understood as the appearance of the toy. Some parents only know their children's age and hobbies, but have no knowledge of toy brands or industries, so they will limit themselves to appearance. For example: "Wow, this robot is so cool. It should be suitable for my son to play with." "Wow, this chick is so cute. It should be suitable for my daughter to play with."Secondly, good toys need to conform to consumer psychology and brand image, and can arouse the resonance and recognition of consumers. For example, some creative and interesting toys can arouse emotional resonance among consumers, thereby increasing brand loyalty and reputation.Finally, good toys need to be unique and differentiated from competitors' products, thereby increasing the brand's competitive advantage. For example, some toys with unique designs and functions can attract consumers' attention and desire to purchase.To sum up, let’s make a simple summary and use a few plain words to explain the evaluation system of children’s toys, that is:Does it look good, is it safe or not, is it fun, is it useful, what is the tonality, and how long can it be played.These evaluation indicators can help toy production and service providers understand consumer needs and market trends, thereby improving product competitiveness and market share. At the same time, a good toy evaluation system can also help consumers better choose toys that are suitable for themselves and their children, and improve the effectiveness and satisfaction of their purchases.
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07-21
2022
How to design a secure Internet of Things (IoT) system?
IoT technology is increasingly used in environmental monitoring and protection, smart healthcare, smart transportation, food safety traceability, logistics supply chain management, smart agriculture, smart manufacturing and other fields. IoT technology not only facilitates our lives and improves resource utilization, but it also faces many challenges. One of the most important challenges in IoT platform design is the security of the IoT system. Especially for industrial IoT design, the value of the system is usually hundreds or even thousands of times that of consumer products, and its security requirements will also be higher. Since IoT technology is still in its early stages of development, a security system based on IoT has not yet been formed, and IoT technology itself is still in the process of continuous evolution. Therefore, it is impossible to provide a unified security architecture based on IoT, but the industry has also proposed Some practical security guidelines that can be applied to current IoT systems.To solve it at the policy level, safety legislation and standard setting at the national level, it is necessary to limit the normative guidance at the industry level and self-discipline at the enterprise level.From a technical perspective, a guiding framework for the implementation of IoT security is needed. This article discusses how to design a secure Internet of Things (IOT) system from the technical perspective of IoT security.The security challenges of IoT systems mainly come from the following aspects:Design flaws: At present, most IoT systems are developed by enterprise DIY and are built using various technologies of different maturity levels. Privacy protection is less considered when designing IoT devices. Security factors such as maintenance and system configuration: Since the Internet of Things is connected to various devices, there is a lack of guidance on device physical security, maintenance management, authorization and authentication.Best practices: Only a few companies or organizations carry out the development and application of IoT systems, and have accumulated less knowledge in IoT development and industry practices.Standard Guide: Lack of guidance on the security design process of IoT systems and application control of IoT systems under multi-tenancy.Shenzhen Zuchuang Microelectronics Co., Ltd. has professional hardware design and software program development capabilities. It is a high-tech enterprise unit. Its service areas include: professionally providing dictionary pens, intelligent electronic product development, endoscopic visual ear-picking solution development, and IOT Internet of Things Platform design, smart home system solution development, toy design, PCB circuit board design, Sonix MCU agent, TWS Bluetooth headset development. We can provide professional advice and reasonable quotations for the development needs of the above solutions.
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07-21
2022
What points should be paid attention to when using the instrument correctly?
In order to avoid errors caused by imperfect measurement methods, attention must be paid to the correct use of the instrument, mainly the following points: (1) Select the instrument type according to the nature of the measurement object. First, DC or AC is measured so that DC meter or AC meter can be selected. If you measure the AC volume, you should also pay attention to whether it is a sine wave or a non-sine wave; when measuring, you should also distinguish whether the measured value is the average value, effective value, instantaneous value or maximum value. For the AC volume, you should also pay attention to the frequency.(2) Select the instrument grade according to the actual needs of the measurement object. According to the nature of the project, as long as the error of the measurement results is within the actual allowable range of the project. For example, in commonly used standards and some precision measurements, instruments with an accuracy of 0.1-0.2 can be used; in experimental measurements, instruments with a level of 0.5-1.5 can be used; in factory production, instruments with a level of 1.0-5.0 can be used.(3) Select the internal resistance of the instrument according to the resistance of the measurement object and the measurement line. For a voltmeter that measures voltage, the larger the internal resistance, the better. The internal resistance of the voltmeter is required to be 100 times larger than the object being measured. For ammeters that measure current, the smaller the internal resistance, the better. The internal resistance of an ammeter is often less than 100 times that of the object being measured.(4) Select the allowable rating of the instrument according to the measurement object. Do not use a large-range instrument to measure small values to avoid inaccurate readings. Of course, you cannot use small-range instruments to measure large amounts of electricity to avoid damaging the instrument. Therefore, when selecting instruments, you must carefully observe the rated voltage, rated current and rated power allowed by the instrument and equipment.
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07-20
2022
Analysis of Characteristics of Digital Display Multifunctional Electric Power Meter
The digital display multi-function power meter is independently developed and is a multi-functional intelligent instrument with programmable measurement, display, digital communication and power pulse transmission output. It can complete power measurement, power measurement, data display, collection and transmission. It is multi-functional. Power instruments are widely used in substation automation, distribution automation, smart buildings, and internal power measurement, management, and assessment within enterprises. Any equipment may "go on strike", and power meters are no exception. Is it too annoying when something goes wrong?Features of digital display multi-function power meter: As an advanced intelligent and digital power grid front-end acquisition component, the multi-function power meter can be used in energy management systems, distribution automation, smart buildings and smart switch cabinets; it can be used with high Accurately measure all commonly used power parameters in three-phase power grid systems: three-phase voltage, three-phase current, active power, reactive power, power factor, grid frequency, active energy, reactive energy, with a variety of wiring methods, and with Communication interface and power pulse output function. Realize LED on-site display and remote RS-485 digital communication. It has the characteristics of easy installation, simple wiring, convenient maintenance, small engineering volume, and on-site programmable setting of input parameters, which can meet various on-site requirements.How to repair or test a powerful multi-function meter! The following editor will talk about "How to repair a digital multi-function power meter? Let the faulty meter and the normal meter run under the same conditions, and then detect the signals at some points Then compare the two sets of measured signals. If there are differences, you can conclude that the fault lies here. This method requires maintenance personnel to have considerable knowledge and skills. It is required to have two instruments of the same model, and one of them is operating normally. .Using this method also needs necessary equipment, such as multimeter, oscilloscope, etc. According to the nature of the comparison, there are voltage comparison, waveform comparison, static impedance comparison, output result comparison, current comparison, etc.
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07-20
2022
How to set the transformation ratio of the multi-function digital display?
The multi-function digital display is a multi-functional intelligent instrument with programmable measurement, display, digital communication, power pulse transmission and output, etc. It can complete electricity measurement, electric energy measurement, data display, collection and transmission. Multifunctional power instruments are widely used in substation automation, distribution automation, smart buildings and internal enterprise power measurement, management and evaluation. The measurement accuracy is 0.5. A data display is just a display instrument that reflects data. For displaying data within an accuracy range based on actual measurements, the error you are referring to should not be caused by the data display. You should focus on the primary component of measurement, such as a pressure transmitter. If the data display you mean is a digital pressure gauge, if the fluctuation of the measured data is outside the error range, you can use a standard pressure source to calibrate the gauge, and note that the accuracy of the pressure source is less than that of the gauge.Installation method of multi-function digital display meter:1). On the fixed power distribution cabinet, choose a suitable place to open a mounting hole with the opening size.Multifunctional digital display2). Take out the instrument, loosen the positioning screw, and remove the fixing clip.3). Insert the instrument installation into the instrument hole of the distribution cabinet.4). Insert the fixing clip of the meter and fix the positioning screw.Note: L-N is the auxiliary power supply, please connect correctly according to the wiring diagram of the instrument case!Shenzhen Zuchuang Microelectronics Co., Ltd. has professional hardware design and software program development capabilities. It is a high-tech enterprise unit. Its service areas include: professional dictionary pen, intelligent electronic product development, endoscopic visual ear digging solution development, IOT Internet of Things Platform design, smart home system solution development, toy design, PCB circuit board design, Songhan microcontroller agent, TWS Bluetooth headset development. We can provide professional advice and reasonable quotations for the development needs of the above solutions.
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07-19
2022
What are the advantages of multi-kinetic energy power instruments?
As commonly used electronic instruments in industrial production, the application of multi-functional power meters can greatly assist different types of industrial production. Its advantages are mainly reflected in the display, detection and recording of process parameters in different types of industrial production processes, thereby improving the speed and accuracy of production operations. In addition, compared with the previous single-function power meters, the multi-function power meters used in industry have made great progress in their functions. In the past, single-function instruments had a single function and parameters. The power system wiring equipment was extremely messy, the degree of motion automation was low, and its own problems were extremely difficult to find and maintain.With the continuous development of science and technology, at present, the new multi-functional power meters have made qualitative progress in their own functions and detection functions. For example, the measurement of single-phase or three-phase power frequency communication voltage and current is very prominent, and it can achieve accuracy, speed and precision in different types of power measurements. Especially in power factor, active power, reactive power, apparent power and frequency data, the displayed data can be controlled within a very small error.In addition, due to the use of new processors, enhanced new high-speed microprocessors and fast and high-precision analog-to-digital converters, most multi-functional power meters currently have functions such as measurement, display, parameter setting, power outage maintenance, communication and data storage. Arguably, the generic name of the instrument alone doesn't sum up the talent of this new type of electronics.With this new type of power meter, we can reduce the cost of production equipment and also deal with more messy problems in production.
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07-16
2022
How to use digital voltmeter and its applicable areas
The multi-function digital display power meter supports various connection methods such as three-phase three-wire, three-phase three-wire (with voltage transformer), three-phase four-wire, three-phase four-wire (with voltage transformer), etc., which can meet the requirements of various power consumption environments. Requirements. I believe that many friends are very interested in how to connect the multi-function digital display meter. Next, Zuichuang Technology has sorted out the wiring methods of the multi-function digital display meter, hoping to be helpful to everyone.1. The multi-function digital display instrument should ensure that the input voltage and current correspond, the phase sequence is consistent, and the direction is consistent; otherwise, there will be numerical and symbol errors (power and electric energy).2. The voltage input of the multi-function digital display instrument must not be higher than the rated input voltage of the product (100V or 400V), otherwise Pt should be considered. For ease of maintenance, it is recommended to use a terminal block.3. The multi-function digital display can work in three-phase four-wire system or three-phase three-wire system mode. The user should choose the corresponding wiring method according to the site usage - generally, the three-phase three-wire connection method is used when there is no center line, and the three-phase four-wire connection method is used when there is a center line. For three-phase three-wire, only two CTs (Phase A and Phase C) can be installed. For three-phase four-wire, three CTs need to be installed. The meter can be set up with two wiring methods. The actual wiring method must be consistent with the meter setting method, otherwise the meter measurement data will be incorrect.4. Current input of the multi-function digital display instrument: 11, 13, and 15 are the incoming terminals of the current transformer, which also represent the current incoming terminals. Standard rated input current is 5A. If greater than 5a, external CT should be used. If the CT used is wired to other instruments, it should be connected in series. Before removing the current input wiring of the product, the CT primary circuit must be disconnected or the secondary circuit short-circuited. To facilitate maintenance, it is recommended to use a wiring board.
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07-03
2022
How to choose between digital voltmeter and ammeter?
1. Instrument sizeIn other words, instrument size is a very fundamental issue. The digital display instrument should be installed on the cabinet, so comprehensive consideration is required. If it's too big, it may not fit. If it is too small, the display number cannot be seen clearly. In addition, large instruments generally have powerful function expansion and the same function price. It can be expensive and has poor functional scalability for small instruments. At present, the main international standard sizes of digital display panels are: 48*24mm; 48*48mm; 48*96mm; 72*72mm; 96*96mm; 96*48mm; 160*80mm.2. Display numbersThis is directly related to measurement accuracy. Generally speaking, the higher the display digits, the more accurate the measurement, and the more expensive it is. There are mainly the following types: II (99, special); (III) (999, rarely); three and a half years (in 1999, ordinary digital displays dominated); IV (9999, mainly intelligent digital displays) ; 4:30 (19999); three-quarters and three-quarters (3999); 5. V (commonly used in counters, totalizers and high-end instruments). Users can choose from a variety of digital display instruments based on measurement accuracy requirements.3.Input signalThe measurement signal is directly input to the instrument. Some industrial signals are directly connected to instruments for measurement. After conversion, some signals will be converted into instruments. The nature of the measurement signal must be clarified. Otherwise, the purchased instrument will be unusable or even damaged. Original equipment. To find out the type of signal: current or voltage, AC or DC, pulse signal or linear signal, we also need to know the magnitude of the signal. The name of the instrument is different from the concept of the input signal. For example, the input signal is a 0-75mvdc ammeter (the name is an ammeter, but the input signal is a voltage signal because the current passes through a shunt to obtain a voltage signal); the input signal is a 0-10vdc tachometer (called a tachometer, the input signal is Voltmeter, because the frequency converter converts the speed signal into a voltage signal).4.Work abilityAll digital display instruments need working power. The working power supply of digital display instruments mainly includes: 220VAC; 110/220V AC; 85-265vac/DC switching power supply, 24VDC (generally customized), 5VDC (small instrument panel).5.Instrument functionsInstrument functionality is often modular. Alternatively, the price of the instrument will vary based on functionality. The digital display has the following optional functions: alarm function and number of alarm output groups (ie, relay action output), feed output and output voltage size and power, transmission output and transmission output type (4-20mA or 0-10V, etc.), communication Output and communication methods and protocols (RS485 or RS232, MODBUS or other protocols) for regulating control instruments. More functions can be selected. For details, please refer to the manufacturer's selection range to select the standard model, and communicate with the manufacturer to confirm that it can be ordered.6. Several important parameters that need attentionMeasurement accuracy (the smaller the value, the more accurate it is), response speed (the smaller the value, the faster the response), working environment, temperature coefficient (the smaller the value, the less affected by temperature), and strong overload capability.7.Special requirementsIf the user has special requirements, it is recommended that the manufacturer confirm whether the requirements are met. Don't take this for granted. For example, IP protection level, high-temperature workplaces, strong interference situations, special signal situations, special working modes, etc.In fact, the choice of digital instruments is not complicated. For simple numerical display you can use this. For first-time users or users who use complex digital displays, if they master the above points, they can choose a good one. Buy the right product.
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07-02
2022
How to use digital voltmeter and its applicable areas
With the continuous development of science and technology, digital display voltmeters have gradually entered our field of vision and are gradually known by more and more people. It is generally used for on-site monitoring of power grids and automatic control systems, which is very common in today's society. So what are its characteristics? The following Group Innovation Technology will learn more about the tips for choosing a digital display voltmeter and its applicable areas. We often encounter customers who say to us: "Just choose a commonly used measuring range" or "Just use the conventional measuring range." These words often make business personnel quite embarrassed. The reasons for the embarrassment are mainly based on the following points:1. Commonly used measuring ranges may not be suitable for you. For example: if you want to measure 10A current, and the current we sell may be 5A, if the salesperson directly gives you a 5A ammeter, the result will be that the meter is burned out.2. Conventional measuring range is a very vague term. The conventional measuring range in each industry is different. Business personnel may not necessarily know what the conventional measuring range is in your industry.If you want to close the deal without burning the meter, the salesperson may choose a relatively large range for you so that you can use it normally without burning the meter. Since there is such a good thing, and it is simple and convenient to handle, why don't the business people do this? Why do they have to ask you for a measurement range?Let’s take a look at what happens when we use a “large range” meter to measure the “small range” value? Let's take measuring 10A current as an example. If you don't tell the salesperson how much current you want to measure, the salesperson may give you an ammeter with a range of 100A or more just to be on the safe side. What will happen if you take 100A and measure 10A? Before that, you have to understand one thing. Digital display instruments generally have an "accuracy", and this accuracy is related to the measuring range.If the accuracy of the ammeter is 0.3%, then the ammeter with a 100A range can be accurate to 100×0.3%=0.3A. In the same way, an ammeter with a 10A range can be accurate to 10×0.3%=0.03A. Do you understand these two data? If you are still not clear, take a look at the following real story:We once encountered a customer using a 1A ammeter to measure microamps. 1A=1000μA, 1×0.3%=0.003A=3μA. A 1A ammeter with a 0.3% accuracy is only accurate to 3μA. It cannot measure a current of 1μA at all. The measurement is also inaccurate. In fact, in real life, no one uses a floor scale (a scale used to measure the load of a car) to weigh. For this reason, it is impossible to measure it. Even if there is data to show it, it is inaccurate. This is the consequence of measuring the "small range" with a "large range" meter. The greater the range difference, the lower the measurement accuracy will be.Therefore, when you choose three-phase digital voltmeters, digital voltmeters and other digital instruments, you must pay attention to the choice of "range". Choosing the conventional range is not your choice.1. FunctionThe three-phase digital display voltmeter is integrated to measure the current, voltage, active power, reactive power, frequency, power factor, active energy, reactive energy, voltage harmonics, current harmonics, zero sequence current, It is a digital power instrument with multiple rate measurement and various multi-functional interfaces such as RS485 communication, 4-20mA analog output, switching input and output. It is currently widely used in power automation, intelligent buildings, factory automation, environmental protection and energy saving, industry control and other fields.2. Usage occasions:1. Building energy consumption management system.2. Power transmission and transformation automation monitoring system.3. Internal assessment management system for industrial enterprises.4. Community high and low voltage distribution cabinets.5. MNS, GCK, GGD and other low-voltage distribution cabinets.6. Power monitoring of computer room and UPS precision power cabinet.
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07-01
2022
Precautions related to the use of digital voltmeter
The digital voltmeter uses advanced microprocessor for intelligent control and accurately measures input current and voltage signals. After CPU operation and processing, it is clearly and intuitively displayed through high-brightness LED digital tubes or high-resolution lamp posts, with optional serial communication function. In addition, the instrument also has two passive alarm contact outputs (upper limit and lower limit), and the alarm value can be set arbitrarily. Some instruments also have analog signal output interfaces to facilitate connection with remote RTUs. Digital display voltmeter has the following functions and features: 1. The full-scale display value, upper and lower limit alarm values and communication address can be set arbitrarily through the buttons on the panel. It is very flexible and convenient to use.2. Optional analog transmission output, 4-20mA, 0-20mA, 4-12-20mA, 0-5V and 1-5V3. Two alarm outputs can be selected to monitor the upper and lower limits of the measurement parameters4. RS485 digital interface is optional, using standard MODBUS-RTU protocol5. It uses direct AC RMS effective value measurement, digital zero point calibration, and digital adjustment, with high accuracy and high cost performance.6. All instrument parameters can be set through the display panelNotes related to using a digital display voltmeter:1. Suitable for use with ambient temperature 0~50℃ and humidity below 85% to prevent adverse phenomena caused by temperature changes.2. Pay attention to prevent vibration and shock3. Do not use it in places with dust, chemicals and gases harmful to electrical products4. If the voltage is abnormal due to magnetic fields or high-frequency instruments, high-voltage sparks, lightning, etc., please use a power line filter or non-linear resistor to absorb external interference.5. The input signal line should be as short as possible. Use protective shielded wire where interfering signals may be mixed. Generally, it is recommended to use twisted pair cable. Furthermore, a digital voltmeter is an instrument that converts the measured voltage value into digital form and represents it in digital form through an analog-to-digital converter. Therefore, when the voltage is abnormal due to magnetic fields or high-frequency instruments, high-voltage sparks, lightning, etc., please use a power line filter or non-linear resistor to absorb the circuit from external interference.
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05-06
2022
After double reduction, the transformation dream of online education giants
Nearly a year has passed since the official implementation of the “double reduction” policy. Former online education companies have quietly implemented business transformation.Zuoyebang announced the launch of the Meow Meow machine learning printer, officially entering the printer market. While many people's impression of this company is still that of a giant in the online education industry, Zuoyebang has intensively released a number of smart hardware products, including electronic word cards, smart pens, etc. The launch of learning printer products has added a new fulcrum to its educational hardware business.Not only Zuoyebang, since the second half of last year, both the former online education giant and major manufacturers have made many arrangements in the field of educational hardware. A new "battlefield" has been formed. Can it support the transformation dreams of giants?Since the end of last year, Zuoyebang has been making frequent moves in educational hardware. First, it launched a variety of products such as learning pens and learning lamps. Not long ago, the electronic word cards of the 100-yuan smart hardware meow machine came out, cutting into the word learning market. Just when the industry was rumored to have set up a learning printer business department within the homework gang, the company recently directly announced the launch of the Miaomiao machine learning printer F1, officially entering the printer market.Among the players who are focusing on educational hardware, Zuoyebang is the first to announce its entry into the printer market, but this is not a product that was born out of nowhere. As early as 2017, Zuoyebang launched the Miaomiao Machine P1, a wrong-question printer with the main selling point of sorting and printing wrong questions. Currently, six models of the product are on the market. The launch of the learning printer is actually the upgrade of Meow Meow Machine from wrong-question printing to learning printing.The market that was vacated after the "double reduction" and the competitive awareness of many parents have given space and soil for educational smart hardware products, which is also the primary reason for the rapid development of this market.Secondly, although all communication media are becoming electronic, the Ministry of Education's "Five Managements" require that the management of primary and middle school students' mobile phones be strengthened, and alternative products such as learning desk lamps have emerged as the times require.Moreover, the leading level of domestic educational technology is also a necessary condition to support the development of intelligent hardware products. The integration of multiple technologies has produced different types of educational intelligent hardware products.In addition, in the past few years, some explosive educational hardware products have achieved good revenue growth, which is a good direction for a large number of education companies that need financing and pan-education companies that have certain growth pressure. After the "double reduction", many teaching institutions themselves also need certain alternative products and new directions.
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