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Positioning transmit device and method of automobile tire temperature and pressure monitoring system

A technology for positioning and transmitting, automobile tires, applied in tire measurement, tire parts, signal transmission systems, etc., can solve the problem of unreliable sensor data transmission, increase market competitiveness, improve wireless communication quality, bit error rate performance improved effect

Inactive Publication Date: 2012-09-05
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

However, the temperature and pressure sensor module of the direct TPMS needs to be installed inside the tire to transmit tire information wirelessly. Due to the shielding effect of the steel mesh in the tire and the hub, when it is used in a large vehicle, the transmitting module and the receiving module often appear due to the long distance. In some tire positions, the sensor data transmission is not reliable enough. In order to solve the above problems, the present invention proposes a technical solution for controlling the positioning and emission of the emission module in the tire, and describes its control mechanism and system modeling method in detail. implementation algorithm

Method used

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  • Positioning transmit device and method of automobile tire temperature and pressure monitoring system
  • Positioning transmit device and method of automobile tire temperature and pressure monitoring system
  • Positioning transmit device and method of automobile tire temperature and pressure monitoring system

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Embodiment Construction

[0041] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0042] combine figure 1 , The positioning and transmitting device of the automobile tire temperature and pressure monitoring system is composed of a microprocessor MCU, an acceleration sensor, a tire temperature and pressure sensor, an ASK transmitting chip, and an antenna matching filter circuit. Wherein the microprocessor MCU is an SP30T chip; the acceleration sensor I and the tire temperature and tire pressure sensor are the on-chip sensors of the SP30T (microprocessor MCU); It is connected with it by means of industrial serial communication and reads acceleration information from it; the ASK transmitter chip is MAX7044; the antenna matching filter circuit consists of 5 capacitive elements and 2 inductive elements figure 2 connected in the manner shown.

[0043] When working, the microprocessor U1 first reads the acceleration measurement value from the accel...

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Abstract

The invention provides a positioning transmit device and method of an automobile tire temperature and pressure monitoring system (TPMS). The positioning transmit device comprises a microprocessor, two acceleration sensors, a tire temperature and pressure sensor, an ASK emitting chip and an antenna matching filter circuit which are arranged on the hub of an automobile tire, wherein the acceleration measuring axes of the acceleration sensor I and the acceleration sensor II coincides with the radial line of the hub, and the acceleration measuring axes and the radial line all point to the same direction. By using the device and method of the invention, the influence of metal components such as the tire steel nets and the automobile body on the radio-frequency signals sent by the transmit device of the TPMS can be effectively overcome. The principle of the invention is simple and is easy to realize, thus the data transmission quality of the TPMS can be increased and the transmission power of the transmit device in the tire can be reduced. Therefore, the bit error rate performance of the TPMS can be greatly improved and the market competition of the TPMS product can be increased.

Description

technical field [0001] The invention relates to a data transmission device of a direct automobile tire temperature and pressure wireless monitoring system (TPMS). The invention also relates to a data transmission method of a direct type automobile tire temperature and pressure wireless monitoring system. Background technique [0002] Car tire temperature and pressure monitoring system (TPMS) is crucial to safe driving. At present, TPMS is mainly divided into two types [1] : Indirect TPMS and direct TPMS. The indirect TPMS uses the ABS tire speed sensor to measure the rotation speed of the tire to judge the tire pressure, and its accuracy and reliability are poor. The direct TPMS system can automatically monitor the tire pressure and temperature in real time while the car is driving, and can play an early warning and ensure driving safety effects, so it has gradually become the mainstream of the market [2] . However, the temperature and pressure sensor module of the direc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C23/04B60C23/20G08C17/02
Inventor 付永庆张林刘占亚陶宝泉姜玉蕾
Owner HARBIN ENG UNIV
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