CN2250278Y

CN2250278Y - Wireless transmission alarm device for tyre air leakage

Info

Publication number: CN2250278Y
Application number: CN 96234164
Authority: CN
Inventors: 刘建平
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-29
Filing date: 1996-01-29
Publication date: 1997-03-26
Anticipated expiration: 2006-01-29

Abstract

The utility model relates to a wireless transmission alarm device for tyre air leakage. A sensitive piece is a transmission screw which is formed by that a ball top-shaped cover plate serving as a wireless transmitting antenna is arranged at the top end of the upper part of a copper clad plate, a spacing nut is arranged at the end section of the lower part of the copper clad plate, and the middle part of the copper clad plate is sheathed with a pressure spring. An audio frequency modulator of a speech integrated circuit is arranged in the wireless transmitting circuit, and the audio frequency modulator is marked with the number of an installed type. The utility model has the advantages of simple structure, convenient installation, reliable work and uneasy damage. The wireless transmission alarm device for tyre air leakage can work normally in any adverse environment. The wireless transmission alarm device for tyre air leakage also has the performance of wide application. The utility model can be installed and used in various kinds of vehicles comprising flat cars, trailers, etc.

Description

Transmission over radio tire deflation warning system

The utility model relates to the warning device that relies on inner tube of a tyre pressure variation action sensing on the inner ad-hoc location of tire, relate in particular to the first Application of radiotechnics aspect the tire leakage alarm promptly with radiowave as the medium that are connected between these two structure members of warning indicating device in sensor and the operator's compartment.

Existing its sensor of this type of annunciator and signal transmitting apparatus structure more complicated, reliability is relatively poor, is not suitable for especially using in harsies environment such as mud, ice and snow.Tire leakage sensor in " motor tire deficency autoalarm " that " the automobile tyre leak alarm " of CN2184588Y bulletin and CN2191117Y announce and all be further improved by holding position and signal transmission etc.

The purpose of this utility model is to overcome the deficiencies in the prior art to propose a kind of transmission over radio tire deflation warning system.

The purpose of this utility model is achieved in that gas leakage sensing and its signal projector are installed between the inner tube of a tyre and lining band of inside tires, especially used radiowave as the medium that connect between sensor and the warning indicating device.Its sensor belongs to the shift transformation type sensor in the mechanical quantity sensor class, it is made up of pedestal and end instr is provided with copper clad plate and the battery of having printed a leakage alarm signal wireless transmission circuit on pedestal, position-sensing unit is that a top above copper clad plate is provided with a ball top shape cover plate as the wireless transmission antenna, latter end below copper clad plate is provided with limit screw cap, and the middle part is with the drive screw of stage clip, established between limit screw cap and the copper clad plate have with copper clad plate on the reed of moving contact of corresponding break back contact built-up circuit switch, in addition its transmission circuit used edit and record indicate carry out voice modulation by the speech IC of entrucking tire position.

The utility model is novel, and is simple in structure, easy for installation, reliable operation, and not fragile, can be in any harsh environment normal operation, moreover it possesses the extensive applicability energy, can comprise on flat truck, the trailer etc. installing and using in various types of vehicles.

The utility model has the following drawings:

Fig. 1 is leakage sensor of the present utility model and its signal projector installation site figure in tire;

Fig. 2 is a tire flat sensor construction scheme drawing of the present utility model;

Fig. 3 is a leakage alarm signal wireless electric wave transmission circuit schematic diagram of the present utility model.

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described.

Metal wheel hub among Fig. 1 (10), lining band (11), the inner tube of a tyre (12), cover tire (13), sensor (14).

It is a switch that is subjected to pressure variation control to Fig. 2 leakage sensor from electricity, form by pedestal (1) and position-sensing unit, be provided with copper clad plate (2) and the battery (3) of having printed leakage alarm signal wireless transmission circuit in the pedestal (1), position-sensing unit is one to be provided with a ball top shape cover plate (4) as radio emissioning antenna on the top of copper clad plate (2) top, end in copper clad plate (2) below is provided with limit screw cap (5), and the middle part is with the drive screw (7) of stage clip (6), is provided with to have the reed (9) of going up the moving contact (8) of corresponding break back contact built-up circuit operating switch with copper clad plate (2) between limit screw cap (5) and copper clad plate plate (2).

Inflate when full at the inner tube of a tyre, be installed in ball top shape cover plate (4) pressurized of this sensor between the inner tube of a tyre and the lining band and overcome the antagonistic force of stage clip (6), make the moving contact (8) on the terminal reed (9) of drive screw (7) break away from upward corresponding break back contact of copper clad plate (2), switch is in off state, leakage alarm signal wireless transmission circuit power supply is cut off, and circuit is not worked; And after inner tube of a tyre gas leakage, the inner tube of a tyre is to the pressure decay of ball top shape cover plate (4), under the reset force effect of stage clip (6), moving contact (8) on the reed (9) of drive screw (7) latter end is gone up corresponding break back contact closed contact with copper clad plate (2), switch is in on-state, power supply is switched on, circuit working, and the leakage alarm signal is gone out by radio wave transmission.

Fig. 3 is a kind of representative type radio frequency-modulated signals transmission circuit, form a capacitance connecting three point type oscillator by VT, C3, C4, C5, C6, R1, R2 and L, it can produce the high frequency radio carrier wave, the medium of the required alerting signal transmission over radio of the utility model just are with the alarm voice of editing and recording in advance among the IC (as: " No. 1 tire fault " or " No. 2 tire faults " ...) signal output just can modulate the high frequency radio carrier wave to VT.Like this, scatter in the certain limit space the high frequency radio carrier wave just by on the superposition say and understand that fetal hair gives birth to the alerting signal of fault.K switch is sensor of the present utility model, the closed entire circuit of K is started working, radiowave sends, this radiowave can be placed in the operator's compartment alarm voice that receives, restores among the IC with any common FM receiver, just knowing after the driver hears has tire to break, and has been that threatened abortion gas.

Therefore the utility model acceptor circuit can adopt common FM radio machine circuit, need not to give unnecessary details, and it can be placed in the operator's compartment any one.

Claims

1, a kind of transmission over radio tire deflation warning system, comprise the leakage sensor of forming by pedestal and position-sensing unit, it is characterized in that leakage sensor and its signal projector are installed between tire inner tube and the lining band, the pedestal of leakage sensor is provided with copper clad plate and the battery that is printed with leakage alarm signal wireless transmission circuit, position-sensing unit is that a top above copper clad plate is provided with a ball top shape cover plate as the wireless transmission antenna, the latter end of copper clad plate below is provided with limit screw cap and the middle part is with the drive screw of stage clip, be provided with between limit screw cap and the copper clad plate have with copper clad plate on the reed of moving contact of corresponding break back contact built-up circuit operating switch, be provided with the audio demodulator that band is indicated the speech IC of tire position of installing in the radio transmitter.