Tire pressure sensor monitoring system
- PRODUCT DETAIL
The tire pressure monitoring system is referred to as "TPMS". This technology can record tire speed or electronic sensors installed in the tire. Real-time automatic monitoring of various conditions of tires can provide effective safety guarantee for driving.
There are two types of tire pressure monitoring systems: One is the indirect tire pressure monitoring system, through the rotational speed difference of the tire to determine the tire is abnormal; The other is a direct tire pressure monitoring system. By installing four tire pressure monitoring sensors inside the tire, the tire pressure and temperature are automatically monitored in real time while the car is stationary or running, and the tire high pressure, low pressure, and high temperature are promptly alarmed. Avoid traffic accidents caused by tire failure to ensure driving safety.
Indirect tire pressure monitoring system
The indirect tire pressure monitoring system is also called WSBTPMS. WSBTPMS needs to compare the speed difference between tires through the wheel speed sensor of the car's ABS anti-lock braking system in order to monitor the tire pressure. ABS uses wheel speed sensors to determine whether the wheels are locked, and thus decides whether to activate the anti-lock system.
When the tire pressure decreases, the weight of the vehicle will make the tire diameter smaller and the speed of the vehicle will change. The speed change will trigger the WSB alarm system to remind the owner to pay attention to the insufficient tire pressure. Therefore, indirect TPMS belongs to passive TPMS.
Direct tire pressure monitoring system
Direct tire pressure monitoring system is also called PSBTPMS. PSBTPMS uses a pressure sensor mounted on the tire to measure the tire pressure and temperature. Use a wireless transmitter to send pressure information from inside the tire to a system on a central receiver module, and then display tire pressure data. When the tire is under high pressure, low pressure and high temperature, the system will alarm the car owner. In addition, the owner can set the tire pressure alarm value range and temperature alarm value based on the vehicle type, vehicle habits, and geographic location. Thus the direct TPMS is an active type TPMS.
The direct system can provide more advanced functions. The actual instantaneous pressure inside each tire can be measured at any time, making it easy to determine the faulty tire. The cost of the indirect system is relatively low. Cars already equipped with 4-wheel ABS (1 wheel speed sensor per tire) only need to upgrade the software. However, the indirect system is not as accurate as the direct system, it cannot determine the faulty tire at all, and the system calibration is extremely complicated. In some cases, the system will not work properly, such as when both tire pressures on the same axle are reduced.
There is also a composite TPMS. It combines the advantages of both systems. It is equipped with direct sensors in two mutually opposite tyres and a 4-wheel indirect system. Compared with all direct systems, this composite system can reduce costs and overcome the disadvantage that the indirect system cannot detect multiple tires with too low air pressure at the same time. However, it still does not provide real-time data on actual pressure in all four tires like the direct system.
Tire pressure sensor reference standard
In Europe and the United States, the original car gradually began to be equipped with the original tire pressure monitoring system, which is directly integrated in the trip computer and displayed in the middle of the dashboard of the center console. In the North American tire pressure monitoring system regulations, it is explicitly required that the tire pressure monitoring system must respond within 2 minutes of an abnormal tire, and an alarm will alert the owner. And the regulations also specify: The tire pressure monitoring system display must alert the owner when the tire pressure monitoring sensor device signal in the tire is not received, or when the reception is unstable.
Many car owners may not have any idea about tire pressure. What kind of air pressure is safe? Look at tire safety from the knowledge of tire pressure monitoring systems. The US Highway Commission states: When the tire pressure is less than 75% of the standard value, the tire pressure monitoring system must alert the vehicle owner. The tire manufacturer data shows that when the tire pressure drops by 30% of the standard value, the tire pressure monitoring system needs to alert the owner. This shows: When the tire pressure drops between 25% and 30% of the standard value on the vehicle's nameplate, driving is safe.
Role of tire pressure monitoring system
The tire pressure monitoring system can not only alert the car owner to driving safety when the tire is under high pressure, low pressure, or high temperature, but also help the car owner save fuel and save money, and become a low-carbon environmental protection family.
TPMS related statistics show: Cars running out of air will consume 3.3% more fuel. Many car owners may not know that the tires are leaking slowly and naturally, and the lack of tire pressure is unknown.
Through the tire pressure monitoring system to keep track of tire conditions, prevent tire bursts, save fuel and protect the environment.
Specific application examples of tire pressure monitoring system: This technology is used in high-end cars.
The tire pressure monitoring system (TPMS) has become a hot spot for research and development in China's automotive electronics industry. In the next five years, 710 million tires worldwide are expected to require tire pressure monitoring sensors. US law requires that all passenger cars and light trucks sold in the United States from August 2007 must be equipped with a tire pressure monitoring system, and European regulations have also been issued. China is a big car consumer. I believe that the government will formulate similar regulations in the near future. The demand for TPMS is causing a new industry to emerge.
And like Corvette, BMW, Infiniti, volvo, chevrolet, Nissan nissan, Audi AUDI, Cadillac, Volkswagen VOLKAWAGEN, Kia KIA, Subaru SUBARU, Isuzu ISUZU, Mazda MAZDA, Ford FORD, Porsche PORSCHE, Hyundai Hyundai, Saab SAAB, Buick BUICK, The tire pressure monitoring system TPMS is used in cars from Toyota TOYOTA, Land Rover, Lexus and other companies. The tire pressure sensors are installed on the four wheels to directly sense the tire pressure and also monitor the tire temperature. This approach is much more advanced and sensitive.
There are still many things that need to be improved in the current tire pressure monitoring system. For indirect systems, the lack of air on the coaxial or more than 2 tires cannot be displayed; Monitoring fails at speeds above 100 km / h. For direct systems, the stability and reliability of wireless signal transmission, the service life of sensors, the accuracy of alarm prompts (with or without false positives and false positives), and the pressure resistance of sensors are all in urgent need of improvement.