Since the implementation of the mandatory installation of tire pressure monitoring system (TPMS) in the United States, the European Union and other countries and regions, China will also implement mandatory installation of TPMS. This regulation greatly improves the safety of car use, and the tire pressure monitoring system is mainly divided into built-in and external, how to choose?
The TIRe Pressure Monitoring System (TPMS) is one of the hottest terms in automotive electronics safety. The tire pressure detection system fixes the high-sensitivity micro wireless sensor device on the car tire, and uses the wireless transmission technology to transmit the tire pressure, temperature and other data to the host in the cab in real time, and then displays it in real time through digital form, with the abnormal alarm system. Prompt the driver to deal with it in time. This ensures that the pressure and temperature of the tire are within a certain standard range, reducing the accident rate caused by abnormal tires such as punctures.
Figure 1 TPMS interface
Nowadays, the TPMS on the market is mainly divided into external and built-in. For the driver, how to choose the suitable tire pressure monitoring system? We consider it from the following perspectives:
1. Installation convenience
The external TPMS directly mounts the sensor on the valve core of the car. It is easy to install and can be installed in just a few minutes. The built-in type is to mount the sensor on the wheel hub inside the tire. It needs professional technicians to remove it with the help of tools. Tires can be installed and take a long time, requiring additional installation costs.
Figure 2 Manually installing an external TPMS
The external sensor needs to be disassembled when inflated, and the built-in sensor can directly inflate the tire. However, car tire inflation is generally not very frequent, which can be considered by new and old drivers.
2. Measurement accuracy
Many people think that the measurement accuracy of an external sensor is not as good as that of a built-in sensor. The external sensor is mounted on the tire valve core and is the direct monitoring of the tire pressure. Therefore, there is no difference between the built-in and external sensor measurement in the tire pressure monitoring. In the measurement of the tire temperature, the external sensor is built-in. There will be an error of 2-3 ° C, but this error is not a problem for the tire temperature.
3. Anti-theft
From the point of view of the anti-theft, since the removal tool used by an external sensor of a manufacturer is consistent, the theft rate of the external sensor is relatively high; the built-in sensor is installed inside the tire, unless the tire is removed together, the sensor is Very safe.
4. Service life
The service life is analyzed from two points: battery life and sensor life.
The battery life of the external sensor is generally 1-2 years, and the battery can be replaced. The battery life of the built-in sensor is generally 3-5 years. After the battery is used up, the battery can only be replenished by replacing the sensor.
The external sensor is installed on the air nozzle and exposed to the air. It needs to be tested by the sun and rain for a long time. The service life of the external sensor is naturally not as good as the built-in sensor inside the tire.
In fact, whether it is external or built-in sensors, its core technology is unchanged. Since the sensor needs to be equipped according to the different procedures of different manufacturers, the program is downloaded in the way of “burning in the boardâ€. The advantage of this is that the chip is first affixed and then burned, and can be burned according to the needs of different models. Different programs, even if there is a defective product that fails to be burned, it is not necessary to remove the chip and then burn it, and the burning operation can be directly performed repeatedly.
Zhiyuan Electronics' P800-ISP multi-channel online programmer is currently playing an important role in tire pressure monitoring, electronic cigarettes and other industries. We look forward to bringing more efficient production solutions to more users.
Wuxi Shengda Yukun Energy Development co.,Ltd , https://www.xlite-solarlight.com