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Portable dynamic detection method and system for braking performance of automobile wheels

A dynamic detection and portable technology, applied in wheel testing and other directions, can solve the problems of inability to measure the magnitude of braking force and balance state, inability to comprehensively evaluate the braking performance of motor vehicles, and unfavorable prediction and evaluation of vehicles, so as to ensure the braking efficiency of vehicles. , Fast and convenient installation and disassembly, reducing the effect of traffic accidents

Inactive Publication Date: 2018-02-23
FOSHAN NANHAI HONGSHENG VEHICLE INSPECTION EQUIP
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AI Technical Summary

Problems solved by technology

[0005] The existing braking performance detection method does not dynamically detect the braking performance of the four wheels during the driving process of the motor vehicle. The size and balance of the power cannot fully evaluate the braking performance of the motor vehicle, especially the braking stability, which is not conducive to the dangerous working conditions such as deviation, sideslip, and loss of steering during the operation of the motor vehicle. Prediction and assessment of direction instability

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  • Portable dynamic detection method and system for braking performance of automobile wheels
  • Portable dynamic detection method and system for braking performance of automobile wheels
  • Portable dynamic detection method and system for braking performance of automobile wheels

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0030] Such as figure 1 Shown, is the dynamic detection method flow chart of portable vehicle wheel brake performance, and this method comprises the following steps:

[0031] Step 101 senses the three-dimensional acceleration of the wheel through the three-axis accelerometer of the wheel test module, and senses the brake detection signal through the pedal force meter;

[0032] Step 102: Utilize the output signal of the wheel tangential acceleration sensor, perform wavelet transform noise reduction processing and short-time Fourier transform operation to extract the wheel signal feature quantity to obtain the wheel rotation period, rotation frequency and wheel angular velocity;

[0033] Step 103 calculates and obtains the vehicle body braking dista...

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Abstract

The invention discloses a portable dynamic detection method and system for braking performance of automobile wheels. The method comprises steps as follows: three-dimension acceleration of the wheels is sensed by triaxial accelerometers of wheel testing modules, and a braking detection signal is sensed by a pedal force sensor; the signal is output by a wheel tangential acceleration sensor, wheel signal characteristic quantity is extracted through wavelet transformation noise reduction treatment and short-time Fourier transform operation, and rotating period, rotating frequency and angular velocity of the wheels are obtained; braking distance, speed and initial braking speed of an automobile body as well as wheel braking deceleration are calculated according to angular velocity parameters ofthe wheels; inequality of braking deceleration balance of the left and right wheels is calculated according to wheel braking deceleration parameters; MFDD (mean fully developed braking deceleration)is calculated according to initial baking spedd and braking distance parameters of the automobile body; braking coordination time is calculated according to the braking detection signal and MFDD parameters. The system comprises the wheel detection modules, round movable hub catch plates, the pedal force sensor and an in-vehicle central control module.

Description

technical field [0001] The invention relates to the technical field of motor vehicle running safety performance detection, in particular to a dynamic detection method and system for a portable vehicle wheel braking performance. Background technique [0002] Motor vehicle operation safety performance detection is an important means to ensure the safe operation of motor vehicles. The dynamic detection technology of motor vehicle operation safety performance is used to detect the safety status and operation indicators of motor vehicle operation, timely discover and prevent motor vehicle failures, and ensure the safe operation of motor vehicles. It is of great significance; it is a major social public welfare technical work related to the safety of the country and people's lives and properties, it is an important technical support to ensure the safety of motor vehicles, and it is a very important technical guarantee for the safe operation of motor vehicles by government managemen...

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Application Information

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IPC IPC(8): G01M17/013
CPCG01M17/013
Inventor 潘梦鹞王锋罗海斌庄宏财
Owner FOSHAN NANHAI HONGSHENG VEHICLE INSPECTION EQUIP
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