What is the principle of a car tire pressure detector?
2 Answers
Car's built-in tire pressure monitoring can be divided into two types: direct tire pressure monitoring and indirect tire pressure monitoring. Both can detect tire pressure, the difference is that the direct type can display specific tire pressure values, while the indirect type only reminds that there is a problem with the tire pressure. Here is a brief introduction to tire pressure monitoring: 1. Direct tire pressure monitoring Direct tire pressure monitoring devices use pressure sensors installed in each tire to directly measure the tire's air pressure, and use a wireless transmitter to send the pressure information from inside the tire to a central receiver module, which then displays the tire pressure data for each tire. When the tire pressure is too low or there is a leak, the system will automatically alarm. 2. Indirect tire pressure monitoring The working principle of indirect tire pressure monitoring is: when the pressure of a certain tire decreases, the weight of the vehicle will cause the rolling radius of that wheel to become smaller, resulting in its rotation speed being faster than other wheels. By comparing the difference in rotation speed between tires, the purpose of monitoring tire pressure is achieved. The indirect tire alarm system actually relies on calculating the rolling radius of the tire to monitor the pressure. Whether it is direct tire pressure monitoring or indirect tire pressure monitoring, both are very necessary for the safety of car driving.
As a car owner, I heavily rely on the tire pressure monitoring system (TPMS). Its principle is quite simple: a small device called a sensor is installed inside the tire, capable of detecting changes in air pressure and temperature. This sensor transmits data via wireless signals to the car's computer system, which then determines if the pressure falls below the set value and triggers a warning light on the dashboard to alert me to check. The system comes in two types: direct and indirect. My car uses the direct type because it offers higher accuracy and fewer false alarms. The key point is, it helps prevent tire blowouts and accidents, enhancing driving safety. I also find it crucial for maintaining vehicle handling and fuel efficiency. I quickly check the tire pressure readings every week to ensure everything is normal. Maintenance isn’t troublesome either—the sensors run on batteries that only need replacement every few years. Overall, it’s technology that makes driving more worry-free and safer, reducing my concerns about tire issues.
