Bluetooth positioning suitcase design

Research and design of multifunctional suitcase based on Bluetooth positioning technology

In order to realize an autonomous multi-functional suitcase that can effectively track with high precision and reduce the burden of travel, people carry Bluetooth 4.0 base stations corresponding to vehicle-mounted Bluetooth devices, and the gyroscope data is transmitted to the Bluetooth base station carried by pedestrians and broadcast by the Bluetooth base station , The data of the gyroscope in the broadcast of the vehicle Bluetooth, combined with the RSSI value of the Bluetooth signal itself, is transmitted to the processor on the transport vehicle for calculation, and the two data are mutually corrected to control the precise tracking of the transport vehicle.

1. Operation process of Bluetooth positioning luggage system

The overall control flow of the system is:

Step 1: Start the total power supply of the system on the transport vehicle; Step 2: Turn on the user-carried device; Step 3: Use the user-carried device for identity verification to start the positioning system and power system of the transport vehicle; Step 4: Wait for an appropriate time to initialize the system and self-calibration; step 5: the transport vehicle reads data and performs calculation control; loop step 5 to control the operation of the entire transport vehicle. After use, you only need to turn off the power of the portable device and the total power of the transport vehicle.

2. Function introduction of the multifunctional luggage system

The system includes a positioning data acquisition system and an information identification device, and the load-bearing intelligent transport vehicle includes a positioning control system, an information identification system and a vehicle power system.

The positioning control system includes: a Bluetooth host, an accelerometer, a gyroscope, a power module, an LED status signal indicator and an FPGA processor, and the distance value and the accelerometer value are obtained through the Bluetooth host. The power module is connected to the lithium battery through the DC-DC voltage regulator circuit to output power for the system, the indicator light shows its working status, and the Bluetooth system transmits the information to the FPGA processor. The FPGA processor processes the obtained data in parallel, and calculates the person's orientation through a certain algorithm. In this way, autonomous tracking and navigation can be realized.

The information identification system is mainly composed of an electromagnetic relay and an NFC module. The NFC module is powered by a power module and connected to the FPGA. The system does not work immediately after the system power is turned on, and the user needs to use the NFC module in the body-carrying device to identify each other with the vehicle-mounted NFC before starting the system, which further improves the security of the system. And from the perspective of ease of use, most of the current smart phones are integrated with NFC modules, so mobile APPs are also provided to facilitate people's identification. In order to further improve the security of the system and prevent the transport vehicle from being stolen, the mobile APP also provides an alarm function. After the Bluetooth signal disappears, an alarm will be sent to the user to remind the user that the transport vehicle has been lost. A small power GPS system is built in the transport vehicle, which can still send out positioning information even when the main power supply is cut off.

The vehicle power system is mainly composed of special wheels, DC motor, DC motor control board, voltage stabilizing circuit and 36, r lithium battery pack, the lithium battery pack supplies power to the DC motor control board and DC motor through the voltage stabilizing circuit, FPGA controls the DC motor Rotating speed. Different rotational speeds correspond to different motion modes such as acceleration, deceleration, and steering.

The body-carried device includes a positioning data acquisition system and an information identification system. The data acquisition system consists of a belt, a Bluetooth|4.0 base station, a gyroscope, an accelerometer, a power module, and an LED status indicator light. The whole device is packaged in the belt and fixed on the waist of the human body. Because the waist is the center of motion of the human body. In this way, the gyroscope obtains the information of the human body turning, and the accelerometer obtains the information of the human body movement. The information identification system is composed of NFC, which is authenticated by pairing with the on-board NFC to complete the start of the transport vehicle and the opening of the transport box.

3. Introduction of Bluetooth luggage technology module

(1) Bluetooth positioning technology: Bluetooth positioning technology is mainly used for short-distance wireless communication. It replaces wired connection with wireless connection, and combines fixed and mobile information devices into a personal area network to realize low-power, low-cost wireless communication between devices.

(2) Ultrasonic obstacle avoidance technology: Ultrasonic waves are used to detect whether there are obstacles in front of the car. An ultrasonic generator and an ultrasonic receiver are placed in front of the car. When the sound waves sent by the ultrasonic generator encounter obstacles, these sound waves will be It will be reflected back. At this time, the ultrasonic receiver is used to receive the reflected sound wave, and then a sound wave converter is installed on the small body to convert the reflected sound wave into other signals.

(3) GPS positioning technology: GPS is the abbreviation of Global Positioning System. When the tracking vehicle is a certain distance away from the user, GPS is used for positioning processing, mainly when there is a large flow of people.

(4) Stair climbing structure: Using a multi-support structure, the center rotates to drive the car body forward to complete the task of going upstairs, and analyzes the terrain through the control terminal to intelligently switch between the two modes of climbing stairs and driving on flat ground.

Summarize

This system has changed people's traditional shopping and going out habits, so that people don't have to worry about carrying heavy objects when shopping on the street or traveling. They can easily shop and walk by simply putting the items in our system boxes. Not only convenient and fast, but also safe and environmentally friendly. This system uses bluetooth technology, instead of being dragged away like ordinary boxes, it can track the bluetooth signal of the mobile phone and automatically follow the owner, which is easy, labor-saving and safe.

The above is the research and design of the multifunctional suitcase based on Bluetooth positioning technology introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. If you have Bluetooth product design and development needs, you can trust us. We have rich experience in custom development of smart electronic products. We can evaluate the development cycle and IC price as soon as possible, and can also calculate the PCBA quotation. We are a number of chip agents at home and abroad: Songhan, Yingguang, Jieli, Ankai, Quanzhi, realtek, with MCU, voice IC, BLE Bluetooth IC, dual-mode Bluetooth module, wifi module. We have hardware design and software development capabilities. Covering circuit design, PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development, voice recognition technology, Bluetooth development, wifi technology, etc. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS earphones, the development of Bluetooth earphone speakers, the development of children's toys, and the research and development of electronic education products.