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Evaluation method for safety status of tire of running automobile

A technology in the driving and safe state, applied in the field of measurement, can solve the problems of large tire danger, ignoring the intermediate transition state, hard threshold critical early warning is difficult to realize reliably, etc.

Inactive Publication Date: 2012-04-18
LANGFANG NORMAL UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Most of the traditional tire monitoring technologies only consider the tire temperature and tire pressure parameters, while ignoring the influence of the change rate of the two on the tire condition and corresponding measures. The tire monitoring method usually adopts the method of preset tire temperature and tire pressure threshold. The classic set is {"dangerous", "not dangerous"}, ignoring the consideration of the intermediate transition state, and only alarming when the monitoring parameters reach or exceed the preset threshold value
Its biggest disadvantage is that "the hard threshold critical warning is difficult to realize reliably", this is because the system does not give an alarm when the tire temperature or tire pressure is in the warning critical state (very close to but not reaching the threshold) or is approaching the critical state at a relatively high speed , but at this time the tires are already in great danger

Method used

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  • Evaluation method for safety status of tire of running automobile
  • Evaluation method for safety status of tire of running automobile
  • Evaluation method for safety status of tire of running automobile

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Embodiment Construction

[0073] The present invention operates according to the following steps:

[0074] 1. The parameters P(t) and P′(t) can be obtained in various ways, such as the effective rolling radius change formula, or the longitudinal stiffness change formula, etc., but the accuracy is low and the constraints The conditions are harsh, and considering the actual requirements, the direct measurement method based on the built-in sensor SP12 has higher precision and stronger reliability.

[0075] The tire pressure data directly measured by the sensor SP12 is not completely consistent with the standard air pressure value, and can be converted by formula (1)

[0076] P B (t)=P SP12 (t)×1.37 (1)

[0077] where P B (t) is the standard air pressure value at time t; P SP12 (t) is the measured value of SP12 at time t.

[0078] Considering the influence of the tire temperature data on the tire pressure, the tire pressure can be further corrected by formula (2) to obtain the tire pressure P(t) at t...

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Abstract

The invention relates to an evaluation method for the safety status of the tire of a running automobile. The evaluation method is used to monitor tire burst dangers in real time. The technical scheme is that tire temperature T (t), tire pressure P (t), change rate T' (t) of tire temperature and change rate P' (t) of tire pressure are taken as input parameters, universe adjustment and fuzzy processing are conducted to four-dimensional input parameters first, fuzzy reasoning, de-fuzzy calculation and max data fusion are conducted to obtain clear value d of burst probability, and finally the safety status of the tire is judged according to the clear value d of tire burst probability. The evaluation method of the invention has the advantages that the precision is high, the practicability is high, the safety status of the tire can be rapidly and accurately judged, the defect of the traditional monitoring technology that 'fixed threshold and critical early warming are difficult to be realized' is fundamentally solved, major accidents such as tire burst are thoroughly avoided and the traffic accident rate is greatly reduced.

Description

technical field [0001] The invention relates to a method capable of judging the safety status of tires according to the status parameters of automobile tires, which belongs to the field of measurement technology. Background technique [0002] The bursting of tires during vehicle running is one of the important reasons for inducing traffic accidents. Statistics show that in traffic accidents, accidents caused by tire failures account for more than 70%, among which tire burst accidents account for about 80% of the total tire accidents. Therefore, it is of great significance to monitor and judge the condition of vehicle tires in real time so that dangerous tires can be replaced in time to prevent tire bursts and reduce traffic accidents. [0003] Most of the traditional tire monitoring technologies only consider the tire temperature and tire pressure parameters, while ignoring the influence of the change rate of the two on the tire condition and corresponding measures. The tir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/02
Inventor 任建强张玲娟
Owner LANGFANG NORMAL UNIV
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