Smart Vacuum Cleaner PCBA Solution Development

In some cities, many households have started to use vacuum cleaners, which have gradually become an important tool for household cleaning. However, in order to meet the pursuit standards of modern people more and more, vacuum cleaners are also slowly upgraded and improved in various details, and gradually it has surpassed the meaning of the vacuum cleaner itself. In this indifferent social environment, home furnishing research should work hard to enter the hearts of consumers, so that consumers can feel warm and safe from the existence and companionship of furnishing, including the design of vacuum cleaners of course. It is not only a cleaning tool that can clean people up, but also a security housekeeper that eliminates troubles and trivial troubles for people.

1. The history of vacuum cleaner development

Modern people's living standards are constantly improving, people's awareness of decoration is gradually increasing, and high-quality life is becoming more and more popular. However, if we want to maintain this noble and continuous existence, we need to keep our living environment clean and tidy at all times. , In this way, the vacuum cleaner appeared in people's field of vision.

As early as the mid-19th century, the world's first vacuum cleaner appeared in the United States, and people named it "Cyclone". As people continue to discover and improve, in 2009, a circular "robot" attracted the attention of many visitors at a technology exhibition in my country because it was cleaning. But such a "robot" that makes everyone feel amazing has already been widely used in the United States and Japan. Its name is "intelligent cleaning robot." Such a robot that can help people who don't like to work clean has been strongly received. Loved by countries such as Southeast Asia and Europe. It replaces brooms, mops and traditional vacuum cleaners, and can still help people clean safely and intelligently when no one is in charge.

2. Development Status of Intelligent Vacuum Cleaners in my country

In recent years, the purchase volume of vacuum cleaners in my country has been continuously increasing, and the growth rate is also very impressive. The vacuum cleaner is no longer a luxury household appliance, it has gradually entered people's consumption concept. After years of progress, China has become a leader in the development and manufacture of home appliances in the world, occupying an important position in the world home appliance market, of course, this also includes vacuum cleaners. Many domestic vacuum cleaner manufacturers have acquired the strength to enter the world through continuous efforts and development.

In China's vacuum cleaner market, vacuum cleaners of small brands occupy many positions, while those of mainstream brands are only a handful. From this point of view, the competition among them is quite fierce. Domestic brands win by quantity, while foreign brands lead by technology. As people's requirements for the home environment and their consumption concepts change, vacuum cleaners will usher in a golden age of development, but in order to better meet human needs, its own technology is also constantly improving.

3. Design Concept of Smart Vacuum Cleaner

When it comes to smart home, it is to use a large number of high-tech technologies to effectively manage and operate home life on the basis of housing, making home life more convenient, safe and environmentally friendly. The smart vacuum cleaner cleans the room according to people's setting requirements through its own electric cleaning equipment, and records the settings that satisfy people, avoids obstacles, and automatically cleans every corner of the room.

1. In terms of materials: the focus of the safety housekeeper is safety. If it leaves safety, the name will lose its meaning, especially as a home product, it will always surround us. In this way, when choosing the material of the safety butler smart vacuum cleaner, we must pay attention to the choice of material safety. This will not only ensure the safety of customers, but also make people more recognized and assured of smart vacuum cleaners.

2. Appearance: As a furniture item, if you want people to like it and place it at home, you should pay attention to its appearance design. Only by making people feel that placing them at home can increase the overall beauty of the room can it be liked by more consumers. Therefore, when designing and choosing colors, we should pay attention to the overall collocation and the diversity of colors.

The smart vacuum cleaner is a power-consuming cleaning tool, so its coverage area should be considered as much as possible when designing the shape, so that it consumes the least amount of power and cleans the largest space. For example, in the section where there are many obstacles to be cleaned, its size should be automatically adjusted so that every corner is cleaned. In a space where there are fewer obstacles to be cleared, the cleaning area should be automatically adjusted so that it can be cleaned faster. In terms of appearance, we should also pay attention to the small and light design, which is easy to carry. In addition, pay attention to the combination of curves and straight lines in terms of appearance, so that the overall look is more energetic and lively. The perfect combination of movement and stillness is a design that people especially love and welcome now.

3. In terms of noise: Everyone does not want their household items to make loud noises when they are in use, which will directly affect people's normal life and lead to people's rejection of them. The same goes for the Safe Butler Smart Vacuum Cleaner. Cleaning is what we do most often in our lives, so if we want to keep the room clean, it requires frequent work of smart vacuum cleaners. But if it makes noise when it works, it will reduce people's usage rate of it. Since you want to reduce its noise, it is better to find some way to cover up its noise, such as installing some voice playback equipment. For example, when cleaning in the morning, the smart vacuum cleaner will automatically play some music to bring the family a good mood for the day; when cleaning in the evening, it can also play news stories to let the family know the information of the day.

4. Practical smart vacuum cleaner sensor technology

With the improvement of consumption level, people increasingly demand that small household appliances should fully reflect the advantages of "intelligence, safety, multi-function, energy saving and environmental protection". Only in this way, "it" will be welcomed and loved by people. Home appliances themselves will have a broader development prospect. At present, all the vacuum cleaners in the shopping malls are used in the traditional design, which makes the competition of the same type of vacuum cleaners more and more intense, and the traditional model of vacuum cleaners has become more and more popular. Can not meet the requirements of consumers to pursue novelty. Therefore, people need a practical intelligent vacuum cleaner product with low price, small size, and high cost performance that can satisfy household applications at the same time.

This paper makes a preliminary discussion on the selection and realization of the sensor, one of the key technologies of the intelligent vacuum cleaner. The controller of the intelligent vacuum cleaner is proposed to use 51 series single-chip microcomputer.

4.1 Overall sensor scheme

The commonly used ranging sensors on mobile robots include ultrasonic sensors, infrared sensors, visual sensors, and laser rangefinders.

The infrared sensor adopts the active method of emitting fixed-wavelength infrared rays and receiving the same echo, with small detection angle, strong directionality, high measurement accuracy and fast response speed. But its disadvantage is that it is greatly affected by the environment. If the infrared detection head is slightly polluted by dust, its measurement accuracy will be greatly reduced, and the detection distance is relatively short, generally not more than 1 meter.

Laser rangefinders can be divided into two types: 2D and 3D according to the different scanning mechanisms, which measure distances in two-dimensional and three-dimensional environments respectively. The 3D laser rangefinder not only provides the distance information of the obstacle, but also provides the reflectivity information of the laser, and can use the laser intensity map to detect obstacles. However, the 3D laser rangefinder is expensive and bulky, and its imaging speed is slow, which limits its further application. In contrast, the 2D laser rangefinder only scans in a two-dimensional plane, has a simple structure, fast scanning speed and dense and accurate data points. Some laser range finders need to be installed with road signs and are not suitable for indoor use of smart vacuum cleaners. Stereo vision distance measurement is a visual system composed of two cameras with known mutual positions. According to the field of view of the same scene imaged on the two cameras, the depth of the scene is calculated to obtain its distance information, but the current technology is not yet mature. It is difficult to meet the requirements of real-time and robustness at the same time. There are many factors to consider when selecting a sensor. First of all, decide which ones to use according to the tasks and requirements to be completed by the smart vacuum cleaner, and then choose according to the performance and characteristics of various sensors. Moreover, economics, that is, cost issues, must also be considered, and sensors of cutting-edge technology cannot be blindly pursued.

Compared with other types of sensors, ultrasonic sensors have the following advantages: strong environmental adaptability, unlimited application in shadow, dust, smoke and other environments, which is especially important for vacuum cleaners. Moreover, ultrasonic sensors are cheaper than visual sensors and laser rangefinders, and are not easily damaged. ‘During the vacuuming process, usually only the general shape of the object and the distance from the robot need to be identified, and information such as color, category, etc. are not required. In addition, distance information obtained by visual sensors such as cameras. , mainly determined by the relative gray level of the object imaged, the gray level information of the object image will change with the light, so it is difficult to judge the distance of the object in a relatively dark environment. The ultrasonic sensor measures the distance information through the emission and reception time of the wave, and has no requirement for the light of the environment.

Considering the poor directionality of ultrasonic sensors, multiple sensors and data fusion technology are used to obtain the required external information.

4.2 Ultrasonic detection principle

Ultrasound (UltrasonieWaveS) refers to sound waves that exceed the human hearing range (above 16kHz). Ultrasonic sensors are composed of piezoelectric ceramic wafers, conical radiation horns, and metal grids. Among them, the piezoelectric ceramic wafer is the core of the sensor. The conical radiating horn is mainly to concentrate the energy of transmitting and receiving ultrasonic waves, and to make the sensor have a certain radiation angle; the metal grid plays a protective role, but does not affect the transmitting and receiving of ultrasonic waves. Commonly used ultrasonic sensors have a center frequency of about 40KHz.

The principle of ultrasonic ranging is to transmit ultrasonic waves in a certain direction through the ultrasonic transmitter, start timing at the same time as the emission time, ultrasonic waves propagate in the air, and return immediately when they encounter obstacles on the way, and the ultrasonic receiver stops immediately after receiving the reflected waves timing. The propagation speed of ultrasonic waves in the air is C, and according to the time difference t between the transmitted and received echoes recorded by the timer, the distance S from the transmitting point to the obstacle can be calculated, that is: S=Ct/2.

4.3 Software Design of Ultrasonic Detection

The software design of this intelligent vacuum cleaner adopts the Rtx51 real-time multi-tasking operating system of Keil Company as the development environment. The main configuration parameters of Rtx51Tiny are: 1 Tick: 10000 system clock, here is lOms; time slice size: l0 Ticks, here is lOOms;

The specific implementation idea is as follows:

MEASURE1: Anterior ultrasound probe ranging task. Call us_wait to wait for a delay (20 Ticks), and immediately hand over the time slice, and the ranging process takes a lot of time. So divide into four tasks, and arrange to start the ranging process at different time points, staggering each other, so as to spread the occupied time as much as possible. MEASURE2: Ranging task of the right ultrasound probe. Call os_wait to wait for a delay (5+15 Ticks), and hand over the time slice immediately. MEASURE3: Ranging task of the left ultrasonic probe. Call os_wait to wait for a delay (10+10 Ticks), and hand over the time slice immediately. MEASURE4: Tail ultrasonic probe ranging task. Call os_wait to wait for a delay (15+5 Ticks), and hand over the time slice immediately.

Summarize

In summary, the use of ultrasonic sensors in smart vacuum cleaners has the characteristics of simple structure, reliable operation, and high cost performance.

If you have a safe housekeeper smart vacuum cleaner in your home, it can clean your home clean and tidy when you are facing busy work, and solve the hygiene problem of the ground for you. It can play beautiful music for you in the morning when the sun rises. She can also share with you what's new about the day when you're exhausted. Do you feel that life is a beautiful thing? Smart home appliances are changing many people's life concepts, and smart home life has become a new trend in people's lives. Then the safe housekeeper smart vacuum cleaner will open the door of this high-tech for people, allowing more people to enter the smart.

The above is the development example of the smart vacuum cleaner introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have a need for vacuum cleaner solution development, you can trust us. We represent a variety of single-chip microcomputers, voice chips, dual-mode Bluetooth ICs, and wifi chips. Brands include Songhan MCU, Yingguang MCU, Jerry Bluetooth, Ankai Bluetooth, Allwinner, and Realtek. Our technical services include: PCB design, MCU development, Bluetooth solution, software and hardware custom development, APP development, small program development, WeChat official account development, etc. It can also undertake the design of intelligent electronic products, the development of living appliances, the research and development of beauty equipment, the application of Internet of things platform, the smart home control system, the development of TWS earphones, Bluetooth earphone speakers, the development of children's educational toys, the design of electronic education products, etc.