轮胎气压监测系统TPMS（译文）Tire pressure monitoring system TPMSTPMS tire pressure monitoring system abbreviation, Chinese meaning for the tire pressure monitoring system. TPMS is divided into direct and indirect type two.Direct TPMS is a wireless intelligent sensor, monitoring system, mainly composed of two parts: hardware, sensor and transmitter is mounted on the inside tires (sensor and transmitter combo, integrated into a complete modular unit) and a receiver is arranged in a driving room and display device (for after market TPMS, usually the receiver and the display of two in one, integrated into a complete modular unit). Sensor for bridge type electronic induction device, real-time sensing accurately, pressure and temperature measurement values within each tire, pressure transmitter will be sensed, temperature data in a wireless (RF RF) way is transmitted to the receiver, display the received information displayed. In this way, the whole system of tire pressure, temperature conditions do real-time monitoring of the whole, when any one of the tire air pressure, temperature abnormal status, TPMS immediately to the driver by the sound, light alarm to remind the form. Indirect TPMS is not directly through the pressure temperature sensor in tyre, but the use of ABS (anti lock braking system) wheel speed sensor and an analysis software in the indirect conversion will change the wheel speed into the change of the tyre pressure, its hardware cost is essentially zero, the main part is an analysis software. Its working principle is that, when a tire pressure is insufficient, the tire diameter is relatively small, its speed relative to the other a tire on the diagonal speed becomes larger, this will change in indirect conversion speed for the tyre pressure changes, can discover whether there is a pressure shortage. The advantages of indirect TPMS, low cost, only need to install a software can analysis.Disadvantages are: 1) the monitoring precision is not enough, only an estimate of the results, only when a serious shortage of tire pressure can be detected. 2) when the system alarm when the tire pressure is insufficient, which tire is unable to display specific problems, must be tested to determine the four tires. 3) usually cannot display the air pressure value of the tyre, only in the alarm, have been warning symbols. And you cannot do the monitoring of high pressure and high temperature. 4) the vehicle in the static state, and at low speeds, or in the potholes driving system does not work. 5) when the four tire also insufficient air pressure, such as when the occurrence of seasonal temperature changes, the system can't tell. 6) easily lead to false positive change the spare tire, because the spare no wear, tire diameter than the other. 7) for snow tires, easily lead to false positives, because snow tires than the common tire diameter. 8) in turn to speed fast, easily lead to false positives, because the outer tire speed is greater than the inner tyre. 9) under certain weather and road conditions, the tire may slip, causing several tire speed is different, also easy to cause false alarm.The high allocation of vehicles of some domestic brands have TPMS as the standard configuration, which is part of the direct TPMS, one part is the indirect TPMS. Currently about statistics, with the direct TPMS for Audi above 2.4 Deluxe Edition, Chrysler, Cadillac. With indirect TPMS for MAGOTAN luxury version, Buick series, and a portion of the BMW etc.. Indirect TPMS for the above shortcomings, but also failed to fully comply with the corresponding standard USA, use has few manufacturers in foreign countries; but because of low cost, the vehicle is still part of the domestic production of.In a word, how to identify your car is installed directly or indirectly type TPMS type TPMS, the tire chop down to see, if equipped with induction / transmitter module valve mouth rim, is the direct TPMS, if not, is the indirect type TPMSTPMS为tire pressure monitoring system的缩写，中文意思为轮胎气压监测系统。
