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Introduction to Tire Pressure Monitoring System (TPMS)

Dec 21, 2022      View: 314

1. Classification of Tire Pressure Monitoring System



One type of simple connection (Wheel-Speed Based TPMS, commonly known as WSB), this type of operating system is based on the car ABS comprehensive speed sensor to compare the speed ratio difference between the car tire, so as to achieve the effect of monitoring tire pressure. When tire pressure decreases, the weight of the car will reduce the diameter of the tires, which will cause a change in speed, and this change can be used to turn on the warning system to send alerts to the driver. This is classified as post-passive.


The other is the immediate type (Pressure-Sensor Based TPMS, commonly known as PSB), this type of operating system uses the level sensor assembled in each tire to directly measure the tire pressure, and uses the wireless transmitter module to send the working pressure information from the internal structure of the tire to the system software in the intermediate signal receiver control module, and then indicates the standard information of each tire pressure. The information of each tire pressure standard is then indicated. When the tire pressure standard is too low or leaking steam, the system will sound and light alarm. This is classified as a prior active protection, such as the Weisman TPMS.


Each of these system software has its good and bad points. Immediately system software can provide better function of measuring the specific instantaneous pressure of the internal structure of each tire anytime and anywhere, very easy to clarify the common fault tires. Indirect system software is less expensive and has long been equipped with 4-wheel ABS (1 speed sensor per tire weapon) for cars that only need to update the system. However, the indirect system software is not as accurate as the system software, it is not at all clear that the common faulty tires, and the system software correction is extremely complicated, in some premises the system will not work properly, such as the same drive shaft of the 2 tire pressure standards are low.


There is also a composite TPMS, which combines the advantages of the above two systems, it is armed with immediate sensors in several diagonal tires with each other, and armed with a 4-wheel indirect system software. Compared with all applications of the immediate system software, this type of composite system software can control costs and get rid of the indirect system software can not detect several tires at the same time there is a standard low air pressure defects. However, it still cannot give the specific pressure dynamics in real time in all 4 tires like the immediate system software.


Today's tire pressure monitoring system may have a lot of areas for improvement. For the indirect system software, the phenomenon of coaxial line or more than 2 tires lacking air cannot be displayed; the detection is invalid at a speed of about 100 km/h. But for the immediate system software, the stability and stability of the network signal transmission, the service life of the sensor, the accuracy of the alarm alert (with accurate report, wrong report) and its sensor resistance to pressure, etc. are all in urgent need of improvement.


At this stage has downloaded the tire pressure monitoring system is Audi car, Bao Ma, the new Mercedes-Benz, Lamborghini, Maserati and Volkswagen and other part of the car line, so to speak TPMS today are still relatively high-grade goods, from the popularization and popularization also have a relatively long distance. According to the survey, in 2004 in the United States, 35% of the new cars on the register are equipped with TPMS, and it is estimated that about 60% in 2005. In the future, when a lot of attention is paid to the safety of cars, tire pressure monitoring systems will sooner or later become standard equipment in all cars, just as ABS from the occurrence to the popularization of the same, must be a process.


In the United States and North America, 75% of the cars are imported with SCHRADER tire pressure monitoring system.


2. Principle of TPMS


The tire dice are fitted with an embedded sensor, which contains a level arm electronic device that magnetically senses the standard air pressure standard air pressure sensing device, which converts the standard air pressure signal into an electronic signal and transmits the signal according to a wireless network transmission system.


TPMS, based on the highly sensitive sensors assembled on each tire, instantly monitors tire operating pressure, ambient temperature and other related information while driving or stationary, and sends it to the signal receiver through the wireless network method, displaying various data changes on the display or alerting the driver by beeping, etc. It also alerts the driver when a tire leak or pressure shift exceeds the safety threshold value (which can be set through the display) to ensure safe driving.


The driver can immediately carry out filling station or air release to the car tires according to the information of the displayed data, and can properly deal with the leakage found, so that big accidents can be solved in small places.


3. Functions of TPMS


◆Tire pressure detection throughout the day;


◆It shows the current tire pressure and ambient temperature;


High and low pressure alarm and continuous high temperature alarm;


◆Tire pressure and low pressure alarm, continuous high temperature alarm;


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◆Server rechargeable battery low battery prompt;


◆The monitor will automatically exit after parking;


◆The server can automatically go into the parking low battery mode when the battery is powered;


◆The corresponding specification pressure value can be set according to the car series and tire parts.


What are the benefits of assembling a car tire pressure monitoring system (TPMS).


(1) effective prevention of tire blowout;


(2) reasonable to prevent the destruction of tires caused by less air driving;


(3) Reasonably prevent the increase of fuel consumption;


(4) To ensure the best handling performance of the car;


(5) to prevent abnormal damage to the car components.


American imports SCHRADER wireless network tire pressure monitoring system TPMS to give you and your family to avoid tire blowout injury, enjoy the joy of driving super security enjoy!


4. The Advantages and Disadvantages of Immediate TPMS and Indirect TPMS:


The advantages of the immediate TPMS: is by the level arm electronic device induction device instant magnetic induction of tire pressure and ambient temperature, the information obtained is the conclusion of accurate detection, is the industry popular, formal, more professional practice.


Disadvantages: expensive to manufacture, assembly and maintenance must be professional technicians.


The advantage of indirect TPMS is: low cost, only need to modify an analysis system can be.


The disadvantages are:


1) The accuracy of the detection is not enough, it is only an estimated result, and it can only be detected when there is a lack of tire pressure standards.


2) When the system alerts the tire pressure is insufficient, it cannot show which tire is actually the problem, and it has to check all four tires one by one to know.


3) Normally, the tire pressure value cannot be displayed, and it will only warn the occurrence of the symbol when there is an alarm.


4) The system software does not work when the car is stationary or at high speed, or when the car is driven on an uneven road.


5) The system software cannot tell when the standard air pressure is not enough for all four tires at the same time, such as when there is a change in temperature. 6) When the spare tire is replaced, it is easy to cause a false alarm, because the spare tire is not worn and its diameter is larger than the other tires.


7) When changing snow tires, it is easy to cause confusion, because the hole diameter of snow tires and ordinary tires is large.


8) When turning at a faster speed, it is easy to cause confusion, because the speed ratio of both tires exceeds that of the inner tires.


9) In some temperature or ground conditions, the tires are likely to run off, resulting in a number of tires with different speed ratios, which is also easy to cause confusion.


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