Analyze the working principle of internal tpms system and external tpms

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As the only medium of contact between the car and the ground, the health of the tire directly affects the handling, comfort and safety of the vehicle. In order to ensure that tires are operating at their best, tire pressure monitoring systems (tpms) have been developed. Tpms systems are divided into two categories: Internal tpms system systems and external tpms, each of which has its own unique working principles and advantages.

Internal tpms system system: Direct monitoring, accurate and reliable

The internal tpms system system, also known as direct tpms, uses sensors mounted inside the tire to directly measure the tire's air pressure and temperature. These sensors are usually fixed to the valve core of the tire or embedded in the rim, and they can continuously monitor the actual conditions inside the tire. The sensor has a battery, pressure sensing element, temperature sensing element and wireless signal transmitter.

When the vehicle is started, the internal tpms system system begins to work, and sensors collect air pressure and temperature data inside the tire, which is then sent to the on-board receiver via radio frequency (rf) signals. The receiver is typically integrated into the vehicle's central control system, which can be part of the dashboard or a display on the center console. Once the tire pressure or temperature is detected to deviate from the normal range, the receiver immediately activates the alarm system to alert the driver and remind him to check or adjust the tire in time.

External tpms: Easy to install and cost effective

In contrast, the external tpms uses a simpler installation method. Such systems typically consist of external sensors mounted on tire valves that look similar to conventional valve caps but have built-in measurement and wireless transmission capabilities. Since it can be installed without removing the tire, the external tpms provides a more convenient solution, especially for those models without a built-in tpms system.

External sensors are also pressure-sensitive and temperature-sensitive and communicate with a receiver in the car via a wireless signal. Although they do not directly touch the internal tire environment like the internal tpms system, they are still able to provide accurate tire pressure and temperature readings. The receiver is usually equipped with a digital display that clearly shows the status of each tire, so that the driver can keep abreast of the tire health.

Technical differences and selection considerations

There are significant differences between internal tpms system system and external tpms in technical realization. Although the internal system is more complex to install and requires professional operation, because the sensor is placed directly inside the tire, its measurement results are more accurate and are not affected by external environmental factors, so it is considered a more reliable option. In addition, the battery life of the internal sensors tends to be longer and the replacement frequency is low, reducing the long-term use cost.

In contrast, the external tpms is simple to install, and users can complete it by themselves, saving installation costs. However, external sensors can be affected by weather conditions, cleanliness, and physical damage, which can affect their performance and reading accuracy. In addition, battery replacements for external sensors are relatively frequent, increasing maintenance costs.

Conclusion

Whether internal tpms system systems or external tpms, they are an important part of modern vehicle safety technology, providing drivers with valuable tire health information. Which system you choose ultimately depends on your budget, vehicle type, and personal preferences. In any case, ensuring that the tires are under the right pressure is crucial to improving vehicle performance, extending tire life and ensuring driving safety. As technology continues to advance, we look forward to seeing more innovative tpms technologies to bring more convenience and safety to the driving experience in the future.