The sensor/transmitter module installed in the tire accurately senses and measures the air pressure and temperature in each tire through the bridge electronic air pressure and temperature sensing device, converts the air pressure and temperature signals into electrical signals, and then transmits the signals to the receiver installed in the cab through the wireless transmitter, and displays them on the display in real time. When the air pressure and temperature of any tire exceed the set normal area value, the signal is transmitted by sound, light and sound.
Domestic TPMS brands such as Siante, Noni, etc.
At present, there are two main types of TPMS. One is based on wheel speed (indirect TPMS), which compares the difference of tire speed through the wheel speed sensor of automobile ABS system to achieve the purpose of monitoring tire pressure. The main disadvantage of this kind of system is that it is impossible to judge that more than two tires are short of air at the same time and the speed exceeds100 km/h.
The other is TPMS based on pressure sensor (referred to as direct TPMS). The system directly measures the tire pressure by using the pressure sensor installed on each tire, and displays and monitors the tire pressure. When the tire pressure is too low or leaks, the system will automatically give an alarm.
In this year's new car introduction, many European car manufacturers also installed TPMS directly into their own models, including Z8 of BMW in Germany, C5 of Citroen in France, Vanquish of Aston Martin in Britain, Bonneville SE, Pontiac's flagship, etc. And the latest improvement of Mercedes-Benz S-Class sedan also takes TPMS as an option; In addition, Chrysler and Dodge minivans, Chrysler 300M and Concorde buses, which went on sale in the summer of 2002, are also equipped with TPMS.
At present, most domestic automobile manufacturers have not released this news. After China's entry into WTO, with the requirements of internationalization, I believe domestic manufacturers will keep up with this pace. With the sustained development of China's economy, more and more cars enter ordinary families, and traffic safety and road traffic problems will be paid more and more attention by management agencies and drivers. With more than 50 million cars in China, the demand for safety products will be more and more urgent. Therefore, according to industry experts' prediction, TPMS, the third largest safety system after ABS and airbags, will also develop rapidly in China.
Shanghai baolong industry & trade Beijing branch 0/kloc-0 10-865035706883704
Tire Pressure Safety Monitoring System (TPMS) is an "active" automobile safety protection system, which provides early warning before tire danger signals appear to avoid major traffic accidents. On June 1 65438+1October1day, 2000, the US Congress promulgated a law requiring that all new cars manufactured in the United States after June165438+1October, 2003 should be equipped with TPMS as standard. At the same time, the European Union has made similar regulations, so people call TPMS the third largest automobile safety system after ABS and airbags. Main functions of TPMS:
1. Real-time monitoring function.
2. High/low pressure alarm function.
3. Fast/slow air leakage alarm function.
4. High temperature alarm function.
5. Simple tire positioning function.
6. Push-to-talk.
7. Ultra-low energy consumption function.
Market unit price: 1880
Member unit price: 1650 yuan.
About MPXY8300 TPMS solution
Freescale's intelligent MPXY8300 system provides accurate and real-time tire pressure measurement by directly monitoring each wheel. In addition, Freescale's single package solution also integrates an accelerometer for motion monitoring. The system can be programmed to send measurement data at a specific tire speed, even when the tire is not rotating.
The MPXY8300 system packaging equipment has the following key components:
Pressure and temperature sensors for compensating tire pressure
8-bit MCU with 5 12b RAM and 16 KB flash memory.
XZ axis accelerometer
Radio frequency transmitter
Low frequency input for receiving diagnostic commands
MPXY8300 combines a large number of low-power technologies, which can extend the life of TPMS battery to more than 10 years. For example, the capacitive sensor technology used in MPXY8300 can support ultra-low power consumption, thus extending battery life.
Paul Grimme, Senior Vice President and General Manager of Freescale Automotive and Standard Products Division, said: "Freescale's continuous innovation in TPMS technology has achieved higher integration and more powerful functions, thus improving driver safety and vehicle performance. "MPXY8300 TPMS sets an industry benchmark for integration, high performance, battery life and overall system value. Our capacitive sensor has the potential to become the leading pressure sensor technology for intelligent TPMS solutions. "
MPXY8300 system features
Highly integrated system packaging equipment
Pressure sensor with two pressure range options:
O bus:100-800kpa
O Heavy trucks: 100- 1500 kPa
Capacitance sensor technology to achieve low power consumption
Motion monitoring accelerometer
The specific power management of TPMS has achieved a battery life of over 10 years.
5 12b RAM, 16 KB 8-bit MCU with flash memory and various low-power timing functions.
RF transmitter with integrated charge pump with frequency of 3 15/434 MHz.
Multi-baud rate and modulation mechanism
Dual channel LF input with monitor/decoder
High temperature protection
Power supply voltage measurement
Low power wake-up timer and periodic reset drive of low frequency oscillation
The integrated filter design realizes the medium protection in the harsh vehicle environment.
20-lead full SOIC package
The operating temperature range is-40 C to+125 C.
Pricing and supply information
At present, MPXY8300 samples have been provided to designated customers, and it is expected that they will be listed in batches in the second quarter of 2008.
The suggested retail unit price per 10000 unit (USD) is:
The MPXY8300A of a car equipped with an XZ-axis accelerometer retails at $6.60.
The retail price of MPXY8300B with Z-axis accelerometer is $5.48.
The retail price of MPXY8300C car without accelerometer is $5.22.
The retail price of MPXY8300A for heavy trucks equipped with XZ-axis accelerometers is $9.64.
The retail price of MPXY8300B, a heavy truck with Z-axis accelerometer, is $8.00.
The heavy truck MPXY8300C without accelerometer retails at $7.63.
Freescale plans to launch development tools in the second quarter of 2008. These tools will contain some firmware drivers to speed up application development. The main advanced software commands include reading pressure, acceleration, temperature, battery voltage and interface with RF transmitter. /qcyp/xpsd/0709/579 10 1 . html
Brief Introduction to the Development of Major Tire Pressure Monitoring System (TPMS) Manufacturers in China
3. 1 Nanjing tire
3.2 Shantou Tokyo
3.3 Foshan Anlixin/Foshan Topchek
3.4 Shanghai Celent (S&; t)
3.5 Syracuse, Henan
3.6 Shanghai Taihao
3.7 Shandong Taian Mingtai (iNTEK)
3.8 Jiangxi Kaiyuan (kysonix)
3.9 Shanghai Qunying Electronics
3. 10 Beijing andun automotive electronic equipment
3. 1 1 Hongkong Li Nuo Electronics Co., Ltd.
3. 12 hangsheng electronics
3. 13 Tonghua Transcendence