CN201034772Y

CN201034772Y - Tyre burst sensor

Info

Publication number: CN201034772Y
Application number: CNU2007200633298U
Authority: CN
Inventors: 彭世益; 彭彦均
Original assignee: GUILIN SICHAO AUTO TECHNOLOGY Co Ltd
Current assignee: GUILIN SICHAO AUTO TECHNOLOGY Co Ltd
Priority date: 2007-05-25
Filing date: 2007-05-25
Publication date: 2008-03-12
Anticipated expiration: 2017-05-25

Abstract

The utility model relates to the design of a tire burst sensor, comprising a metal bellows, a permanent magnet, a tongue tube switch and a shell. The metal bellows produces a displacement driven by the pressure difference at the tire burst and drives the permanent magnet to move towards the tongue tube and thus closes the switch, sending out the signal of the tire burst. The tire burst sensor can detect the tire burst at the first time, having the characteristic of strong real-time monitoring at the tire burst and meeting the demand of long-term low power stable work of the detection system.

Description

A kind of sensor of blowing out

Technical field

The utility model relates to the tire safety monitoring technology of vehicle with the Puffer-type tire, specifically is to be used to blow out the sensor of blowing out of monitoring.

Background technology

Can be used in the air pressure detection technique of tyre in motion existing, the TPMS (tire pressure monitoring system) that adopts wireless communication mode is for to make its subsystem energy content of battery keep the working time of several years, and the TPMS subsystem detects an air pressure usually after interval 3s even the dormancy of longer time.And the occupant survives in wishing just to place on and can take safe deceleration measure timely and effectively in 2s～3s after the tyre break; If the air pressure sense cycle of TPMS subsystem is shortened to 100ms, then battery power consumption will improve nearly 30 times, and will reduce significantly the serviceable life of TPMS subsystem battery.Therefore, no matter existing TPMS is real-time, or mission life all can not satisfy the requirement of blowing out and detecting.

Summary of the invention

The purpose of this utility model is: solve the deficiencies in the prior art, design a kind of real-timely, satisfy the passive tyre explosion detecting sensor that low-power consumption detects needs, can first accurately obtain signal of tyre burst constantly what blow out by the utility model; Can make and work in low power consumpting state, TPMS subsystem that real-time is low possesses tyre explosion prison ability.

A kind of sensor of blowing out of the utility model design is characterized in that: the sensor of blowing out is made up of metallic bellows, permanent magnet, dry-reed tube switch and the shell of sealing; Metallic bellows is made the inner seal chamber that is filled with a kind of gas at least, and an end of wavy metal tube axis direction is installed on shell; Permanent magnet is installed in the other end of wavy metal tube axis direction; Dry-reed tube switch is installed on shell, can change the position of on off state under the permanent magnet influence that the metallic bellows displacement drives.

The sensor of blowing out is installed in the tire, and the dry-reed tube switch of the sensor of blowing out is connected the TPMS subsystem of same tire; When inflation of tire during to normal tire pinch roller tire, metallic bellows is compressed by tire pressure, and drive permanent magnet and leave the zone that influence dry-reed tube switch, the dry-reed tube switch disconnection, the TPMS subsystem enters normal operating conditions after detecting air pressure; When tyre break or leakage, the tire internal gas pressure descends, cause the condition of metallic bellows compression to disappear, metallic bellows recovers form under the air pressure inside effect, drive permanent magnet near dry-reed tube switch, make the dry-reed tube switch closure, the TPMS subsystem is waken up immediately, in time signal of tyre burst or tire pressure parameter is sent to master control system.

Remarkable result of the present utility model is: owing to utilized metallic bellows to depress compression in normal tire, recover the characteristic that form produces displacement after tyre break or tire pressure descend, drive dry-reed tube switch output tire detonating signal; The sensor of blowing out can detect signal of tyre burst in first moment that occurs blowing out, and has both met the real-time characteristics of tyre break monitoring, satisfies the requirement of the long-term low-power consumption steady operation of TPMS system again.

Description of drawings

Fig. 1, sensor construction figure blows out;

Fig. 2, the sensor of blowing out are connected electrical schematic diagram with the TPMS subsystem.

Embodiment

Below in conjunction with Fig. 1, Fig. 2, the embodiment 1 of the sensor of blowing out of the present utility model is described in detail.

As shown in Figure 1, inside is filled with the sealing metal corrugated tube 1 of certain gas-pressure nitrogen, one end of its axis direction is installed in shell 4, and the other end of metallic bellows 1 axis direction is installed permanent magnet 2, and the magnetic field N of permanent magnet 2-S direction is parallel with dry-reed tube switch 3 length directions; Dry-reed tube switch 3, be installed in shell 4, can drive along axis under permanent magnet 2 displacements at metallic bellows 1, change the position that the A-B end of dry-reed tube switch 3 is closed or disconnect, the pcb board 41 of shell 4 is used for being connected of insulation between dry-reed tube switch 3 and the shell 4 and signal output apparatus.

The sensor of blowing out is connected (see figure 3) with TPMS subsystem in being installed on same tire, and the A of dry-reed tube switch 3, B end is connected with INT, the GND of TPMS subsystem respectively.When tire was not inflated, metallic bellows 1 was subjected to make permanent magnet 2 near dry-reed tube switch 3 under its air pressure inside P effect, and the A-B end of dry-reed tube switch 3 is closed under permanent magnet 2 influence of magnetic field, makes INT be in low level; This moment, the TPMS subsystem did not enter the air pressure testing process as yet, and the low level that the closure of A-B is caused does not respond; When inflation of tire during to normal tire pressure, metallic bellows 1 is compressed by tire pressure, drive permanent magnet 2 and leave the zone that influences dry-reed tube switch 3, the A-B of dry-reed tube switch 3 disconnects, make INT be in high level, the TPMS subsystem enters duty after detecting air pressure, by detecting a tire parameter after every dormancy 3s or longer time; When tyre break or leakage occurring, cause metallic bellows 1 compressed condition to disappear, metallic bellows 1 recovers form under the air pressure inside effect, drive permanent magnet 2 near dry-reed tube switch 3, A-B end closed output low level under permanent magnet 2 influence of magnetic field of dry-reed tube switch 3, make that the TPMS subsystem is waken up immediately, in time signal of tyre burst and tire pressure parameter are sent to master control system with wireless mode, provide information for master control system takes safety measures.

Claims

1. sensor of blowing out, it is characterized in that: the sensor of blowing out is made up of metallic bellows, permanent magnet, dry-reed tube switch and shell; Metallic bellows is the inner seal chamber that is filled with a kind of gas at least, and an end of wavy metal tube axis direction is installed on shell; Permanent magnet is installed in the other end of wavy metal tube axis direction; Dry-reed tube switch is installed on shell, can change the position of on off state under the permanent magnet influence that the metallic bellows displacement drives.