An indirect tire pressure monitoring system and method

Abstract

The invention provides an indirect tire pressure monitoring system and method. The system includes a signal preprocessing module, an angular velocity calculation module, a working condition compensation module, a tire self-adaptive model compensation module, a slip ratio calculation module, Traction analysis module and tire relative radius difference calculation module; the method of the present invention obtains the pressure information of the tire by performing data fusion analysis on the original wheel speed signal of the wheel speed sensor and the existing signal of the vehicle, and realizes the function of tire pressure monitoring; It can be realized by low-cost hardware, and can also be integrated into the vehicle ABS / ESC system. It has strong practicability, many expansion functions, good application portability, no hardware maintenance in daily use, and effectively reduces the hardware cost of the vehicle; the invention is effective It avoids the shortcomings of the direct tire pressure monitoring system such as signal delay and easy interference during signal transmission, and enhances the stability of the monitoring function.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics, and in particular relates to an indirect tire pressure monitoring system and method. Background technique [0002] Since the birth of the world's first car, great changes have taken place in human life, work and other aspects. Cars have changed from a simple means of transportation to an integral part of human life, and people's demand for car safety is also increasing. Tires, as the only part in contact with the ground in the entire vehicle, are closely related to the safety of the vehicle, and a tire burst will pose a huge threat to the life safety of drivers and passengers. Statistics show that the ratio of tire blowout causes in traffic accidents is as high as 60%. If the speed of the vehicle exceeds 160 km / h, the survival probability of front wheel blowout is almost zero. 75% of punctures are caused by insufficient tire pressure. When the tire is under-inflated, the side of ...

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Problems solved by technology

[0004] 1. Direct tire pressure monitoring requires more hardware support. It needs four tire pressure sensors with batteries and wireless transmission modules, tire pressure monitoring receivers, displays, and alarm signal transmission lines. The cost is relatively high (about 250-500 yuan for a single car) );

[0005] 2. It is necessary to replace the battery regularly, remove, install and adjust the tires, and recalibrate the sensor. If the sensor is damaged, it needs to be replaced, which increases the user's use cost;

[0006] 3. In the process of signal transmission, there are problems of loss, delay and electromagnetic interference, and the power and wear of the tire pressure sensor also affect the functional stability

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