Testing method for monitoring automotive ABS (Antilock Braking System) performance based on hub type intelligent sensing self-adaptive variable-frequency sampling

Abstract

The invention discloses a testing method for monitoring automotive ABS (Antilock Braking System) performance based on hub type intelligent sensing self-adaptive variable-frequency sampling. According to the method, an MEMS (micro electro mechanical system) gyroscope-free strapdown microinertia measurement technique is applied; intelligent wheel sensing modules are mounted on the equatorial planes of hubs of all wheels of a car; an intelligent inertia measurement unit is mounted on a car body; the sensing data of the intelligent wheel sensing modules are obtained according to the self-adaptive variable-frequency sampling of the longitudinal speed of the car body obtained through calculation; braking performance parameters (wheel slip ratio) are obtained through signal conditioning, digitalization, an attitude algorithm and a braking algorithm by combining with the data of the intelligent inertia measuring unit mounted on the car body; the wheel slip ratio (such as the ABS braking performance) measured by an automotive ABS is monitored; the trend of the braking performance parameters can be predicted by carrying out data fusion and analysis on the parameters; and the movement safety condition of a motor vehicle is actively evaluated.

Description

technical field [0001] The invention relates to the field of monitoring the safe running state of an excited vehicle, in particular to a wheel-mounted intelligent sensor-based self-adaptive frequency conversion sampling to monitor the real-time situation of the ABS performance of the vehicle during driving. Background technique [0002] Motor vehicle operation and installation status monitoring technology is the main means to ensure the safe driving of motor vehicles, and it is also the inevitable trend of the development of motor vehicle operation safety detection technology. It is of great significance to the safe operation of motor vehicles and the promotion of the development of the motor vehicle industry and transportation by adopting the motor vehicle operation safety state monitoring technology to dynamically monitor the motor vehicle operation safety state and operation indicators, and to detect and prevent motor vehicle failures in time. [0003] Motor vehicle opera...

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Problems solved by technology

[0005] The patent related to the present invention is "A Method for Monitoring Wheel Braking Performance Based on Wheel-Loaded Intelligent Sensing" (authorization number: ZL200910077744.2). The main braking performance parameters of the wheels that can be monitored by the method mentioned in this patent include: Wheel slip rate, wheel road surface adhesion coefficient, wheel braking force, wheel braking deceleration, etc., but does not adopt the method of adaptive frequency conversion sampling, but samples at a fixed frequency. The disadvantage is that if the sampling frequency is too low If the frequency is high, it will cause a waste of wireless communication energy consumption in the sampling process and increase the calculation burden of the processor.

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