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An indirect tire pressure monitoring method based on obd interface

A tire pressure monitoring and indirect technology, applied in tire measurement, tire parts, transportation and packaging, etc., can solve problems such as interference of the original car ABS system, complicated installation, brake failure safety problems, etc., to eliminate interference, easy maintenance, low cost effect

Active Publication Date: 2018-02-09
HANGZHOU LIANYUN AUTOMOBILE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to be wired directly from the ABS, the installation is complicated, and it is easy to cause interference to the original car's ABS system, resulting in serious safety problems caused by brake failure.

Method used

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  • An indirect tire pressure monitoring method based on obd interface
  • An indirect tire pressure monitoring method based on obd interface
  • An indirect tire pressure monitoring method based on obd interface

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Embodiment Construction

[0023] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, a certain type of four-wheeled car will be taken as an example below, and the implementation manner of the present invention will be described in detail in conjunction with the accompanying drawings.

[0024] The indirect tire pressure monitoring method based on the OBD interface comprises the following steps:

[0025] 1) Initialize according to the state of the vehicle: when the vehicle uses this method for the first time, start the initialization program, collect the data of each wheel speed while the vehicle is running, calculate a set of relative deviations of each wheel speed, and use this set of relative deviations as the speed of each wheel The initial value of the relative deviation of the vehicle; when the wear state of the vehicle changes seriously, the tire is replaced or the inflation of the tire is changed, the initialization program is started again, th...

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Abstract

The invention discloses an indirect tire pressure monitoring method based on an OBD interface, which includes the following steps: 1) Initialize according to the state of the vehicle; The speed data of each wheel while the vehicle is running; 3) Data storage: set up two sets of memory, and use the FIFO first-in-first-out method to store the above-mentioned collected wheel speed data synchronously; 4) Data calculation: for each group collected and stored The wheel speed data is calculated to obtain the average value of the relative deviation of the wheel speed and the rate of change of the relative deviation; 5) Analysis and judgment: compare the average value of the corrected relative deviation and the rate of change of the relative deviation with the safety standard value, if it exceeds the safety standard value, a reminder is issued. The invention has the advantages of simple structure, convenient installation, easy maintenance, low cost, no influence on the hardware of the original vehicle, and can eliminate the interference of the driving state of the vehicle and the state of the vehicle itself on the tire pressure monitoring accuracy.

Description

technical field [0001] The invention relates to automobile tire pressure monitoring technology, more specifically, the invention relates to an indirect tire pressure monitoring method based on an OBD interface. Background technique [0002] With the popularization of automobiles, the safety and stability of automobiles have been paid more and more attention. Monitoring the tire pressure during driving can avoid traffic accidents caused by tire failure in time, reduce the wear of the suspension system, and make driving more economical. Tire pressure monitoring technology is mainly divided into two types: direct type and indirect type. [0003] The direct tire pressure monitoring technology uses the pressure sensor installed in each tire to directly measure the air pressure of the tire, which has high accuracy, but because this method needs to use the wireless transmitter to transmit the pressure information, it will affect the battery life of the internal battery. The capac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C23/00
Inventor 徐烨
Owner HANGZHOU LIANYUN AUTOMOBILE SCI & TECH CO LTD