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Method monitoring air pressure of automobile tire in running

A technology for monitoring automobile tires and air pressure, which can be used in tire measurement, tire parts, measuring devices, etc., and can solve problems such as false alarms and leakage alarms.

Inactive Publication Date: 2009-11-11
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can detect whether the air pressure of a certain wheel is abnormal by detecting and comparing the rotational speed of each wheel, but it is prone to false alarms or missed alarms after the vehicle turns or the tire is rotated or replaced.

Method used

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  • Method monitoring air pressure of automobile tire in running
  • Method monitoring air pressure of automobile tire in running
  • Method monitoring air pressure of automobile tire in running

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] When the wheel speed sensor is not installed on the car wheel, the hardware parts such as the wheel speed sensor, signal processing circuit, microprocessor, function selection switch circuit, status indication and alarm output should be installed independently, and the tire pressure can be realized after processing by the microprocessor. monitoring functions such as figure 1 shown.

[0067] Take a car with two axles and four wheels, two front wheels as driving wheels or two rear wheels as driving wheels as an example

specific Embodiment approach

[0069] (1) Calibration implementation

[0070] When calibrated according to the aforementioned method, the recorded pulse numbers of the four wheels are:

[0071] N 1 =9990,N 2 =10000,N 3 =10010,N 4 =10020

[0072] Then the correction coefficients for each round are:

[0073] k 1 = 1.0015k 2 = 1.0005k 3 =0.9995k 4 =0.9985

[0074] (2) Modification of implementation

[0075] Assuming that within a certain sampling period, the recorded pulse numbers of the four wheels are:

[0076] N 1 =1009,N 2 =1000,N 3 =1001,N 4 =1002

[0077] The corrected standard pulse numbers are:

[0078] SN 1 =k 1 ×N 1 =1010.5 SN 2 =k 2 ×N 2 =1000.5

[0079] SN 3 =k 3 ×N 3 =1000.5 SN 4 =k 4 ×N 4 =1000.5

[0080] (3) Comparison method implementation

[0081] ① The pulse error of each round calculated by the four-mean comparison method:

[0082] ΔSN 1～4 =0.75%, -0.25%, -0.25%, -0.25%

[0083] The pulse error of each round calculated by the three-mean comparison method: ...

Embodiment 2

[0102] When the wheel speed sensor is installed on the automobile wheel, the present invention can share the wheel speed sensor, independently install the hardware parts such as signal processing circuit, microprocessor, function selection switch circuit, state indication and alarm output, after processing by the microprocessor, Realize the monitoring function of tire pressure, such as figure 2 shown.

[0103] Take a car with two axles and four wheels, two front wheels as driving wheels or two rear wheels as driving wheels as an example to illustrate the specific implementation. Its calibration implementation, correction implementation, comparison method implementation, and final judgment implementation are all the same as in Example 1.

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Abstract

The invention discloses a method for monitoring the air pressure of automobile tires while driving. An alarm message is issued when the air pressure is abnormal. The invention collects, sorts, analyzes, compares, and judges the pulse signals output by each wheel speed sensor of the car while driving, and can judge the driving conditions such as turning, braking drag, driving wheel slip, etc., and proposes detection parameters ( The comparative analysis method of the number of pulses) is designed, and the alarm mode of abnormal tire pressure is designed when the monitoring parameters exceed the threshold for many times. The invention can accurately and effectively predict the abnormal situation of the tire pressure of the automobile during driving.

Description

technical field [0001] The invention relates to a method for real-time monitoring of the air pressure of a running automobile tire. Background technique [0002] When a car is running, a blown tire is one of the important causes of vicious traffic accidents. If the tire is driven under abnormal air pressure, especially under low air pressure for a long time, it is easy to cause the temperature of the tire to rise sharply, which will eventually cause the tire cord to break and cause a blowout. Tires have ever-increasing information until they blow out. By detecting and analyzing this information, a judgment can be made on the working condition of the tire and a forecast can be made before the tire blows out. The rotational speed of the wheel and the change in the rolling radius of the wheel are important information. The change of tire inflation pressure directly affects the size of the tire rolling radius and the speed of the wheel speed, and the size of the tire rolling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C23/06G01L27/00
Inventor 韩宗奇王立强夏怀成刘全有
Owner YANSHAN UNIV
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