CN201583284U

CN201583284U - Inductance type sensor

Info

Publication number: CN201583284U
Application number: CN2009202865388U
Authority: CN
Inventors: 许用疆; 沈海淼; 甘海苗
Original assignee: SHANGHAI LANBAO SENSOR CO Ltd
Current assignee: Shanghai Lanbao Sensing Technology Co., Ltd.
Priority date: 2009-12-29
Filing date: 2009-12-29
Publication date: 2010-09-15
Anticipated expiration: 2019-12-29

Abstract

The utility model relates to an inductance type sensor, comprising an oscillatory circuit, a self-checking circuit, an output circuit, a voltage-stabilizing circuit and an operating circuit, wherein the oscillatory circuit comprises a magnetic core, a capacitor and a single chip microcomputer applicable to an approach switch; the self-checking circuit comprises a diode and the capacitor; the output circuit comprises a triode, the diode and the capacitor; the voltage-stabilizing circuit comprises a voltage-stabilizing diode and the triode; and the operating circuit comprises a not gate and a nand gate. The oscillatory circuit is connected with the self-checking circuit through the single chip microcomputer (IC1) so as to transmit signals to the self-checking circuit; signals processed by the self-checking circuit and signals through the single chip microcomputer (ICI) are processed by the operating circuit, transmitted to the output circuit and finally output; and the voltage-stabilizing circuit is respectively and mutually connected with the oscillatory circuit, the self-checking circuit, the operating circuit and the output circuit. The inductance type sensor provides an inductance type sensor capable of judging three states of 'on', 'off' and 'working' of the inductance type approach switch.

Description

Inductance type transducer

Technical field

The utility model relates to a kind of inductance type transducer, particularly a kind of self diagnosis formula inductance type transducer.

Background technology

Inductance type transducer is to utilize electromagnetic induction tested physical quantity such as displacement, pressure, flow, vibration etc. converts the variation of the coefficient of self-induction and the coefficient of mutual inductance of coil to, be the variable quantity output of voltage or electric current by circuit conversion again, realize the conversion of non electrical quantity to electric weight.The height electricity of at present common inductance type transducer output can only inductance shows " opening " and " pass " two states near switch frequently.But can't reflect and whether be in duty.

The utility model content

The utility model provides a kind of can judge that inductance approach switch " is opened ", the inductance type transducer of " pass " and " work " three kinds of states.

For addressing the above problem, the inductance type transducer of the utility model self diagnosis formula comprises: housing and the self diagnosis formula circuit that is arranged on described shell cavity inside.

Described self diagnosis formula circuit comprises interconnective sensing circuit and magnetic core arrangement.

Described housing also comprises cable and the pilot lamp that is connected with described self diagnosis formula circuit respectively.

Described magnetic core arrangement comprises and interconnects magnetic core and skeleton that described skeleton and described shell cavity inside interconnect; Described magnetic core and described sensing circuit interconnect by electric wire.

Described sensing circuit comprises and comprises described magnetic core L1, capacitor C 1, capacitor C 2 and be applicable to oscillatory circuit near the special chip IC 1 of switch; The self-checking circuit that comprises inverter ic 2A, inverter ic 2B, inverter ic 2C, diode D1 and capacitor C 4; The output circuit that comprises triode T2B, triode T2A, triode T3, diode D5, diode D6 and capacitor C 7; The mu balanced circuit that comprises voltage stabilizing diode D2, voltage stabilizing diode D3, triode T1, diode D4; The computing circuit that comprises not gate IC2D, not gate IC2E and Sheffer stroke gate IC3A, Sheffer stroke gate IC3B.

Described oscillatory circuit is connected with described self-checking circuit by No. 5 pins of described special chip IC 1, carries signal to described self-checking circuit; Be transported to described output circuit through described computing circuit processing, output at last through the signal of self-checking circuit processing and the signal of exporting by described special chip IC 1 pin 4; Described mu balanced circuit and described oscillatory circuit, described self-checking circuit, described computing circuit, described output circuit interconnect respectively.

Described cable is connected with described sensing circuit respectively with described pilot lamp.

Described housing is provided with packoff in the outside of described magnetic core arrangement.

Description of drawings

Fig. 1 is the three-dimensional structure diagram of the utility model inductance type transducer.

Fig. 2 is the circuit module figure of the utility model inductance type transducer.

Fig. 3 is the circuit theory diagrams of the utility model inductance type transducer.

The explanation of main Reference numeral in the utility model Figure of description:

1-cable 2-pilot lamp 3-skeleton 4-magnetic core 5-O-ring seal

Embodiment

In conjunction with preferred implementation method the present invention is done to describe further with reference to the accompanying drawings.

The inductance type transducer of the utility model self diagnosis formula comprises as shown in Figure 1: housing and the self diagnosis formula circuit that is arranged on described shell cavity inside.

Described housing comprises cable 1 and the pilot lamp 2 that is connected with described self diagnosis formula circuit respectively.

Described magnetic core arrangement comprises and interconnects magnetic core 4 and skeleton 3 that described skeleton 3 and described shell cavity inside interconnect; Described magnetic core 4 and described sensing circuit interconnect by electric wire.

Described sensing circuit comprises and comprises described magnetic core 4, capacitor C 1, capacitor C 2 and be applicable to oscillatory circuit near the special chip IC 1 of switch; The self-checking circuit that comprises diode IC2A, diode IC2B, diode IC2C, diode D1 and capacitor C 4; The output circuit that comprises triode T2B, triode T2A, triode T3, diode D5, diode D6 and capacitor C 7; The mu balanced circuit that comprises voltage stabilizing diode D2, voltage stabilizing diode D3, triode T1, diode D4; The computing circuit that comprises not gate IC2D, not gate IC2E and Sheffer stroke gate IC3A, Sheffer stroke gate IC3B.

Described cable 1 is connected with described sensing circuit respectively with described pilot lamp 2.

Described housing is provided with packoff 5 in the outside of described magnetic core arrangement.

Below preferred embodiment of the present utility model is specified, but the utility model is not limited to described embodiment, those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of the invention spirit, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.

Claims

1. inductance type transducer is characterized in that: the self diagnosis formula circuit that comprises housing and be arranged on described shell cavity inside,

Described self diagnosis formula circuit comprises interconnective sensing circuit and magnetic core arrangement;

2. inductance type transducer according to claim 1 is characterized in that: described magnetic core arrangement comprises and interconnects magnetic core and skeleton that described skeleton and described shell cavity inside interconnect; Described magnetic core and described sensing circuit interconnect by electric wire.

3. inductance type transducer according to claim 1 and 2 is characterized in that: described sensing circuit comprises described magnetic core (L1), two electric capacity (C1, C2) and the oscillatory circuit that is applicable to the special chip (IC1) near switch; The self-checking circuit that comprises four phase inverters (IC2A, IC2B, IC2C, D1) and an electric capacity (C4); The output circuit that comprises three triodes (T2B, T2A, T3), two diodes (D5, D6) and an electric capacity (C7); The mu balanced circuit that comprises two voltage stabilizing diodes (D2, D3), a triode (T1), a diode (D4); The computing circuit that comprises two not gates (IC2D, IC2E) and two Sheffer stroke gates (IC3A, IC3B).

Described oscillatory circuit is connected with described self-checking circuit by a pin of described special chip (IC1), carries signal to described self-checking circuit; Be transported to described output circuit, output at last through the signal of self-checking circuit processing with by the described computing circuit processing of the signal process of another pin output of described special chip (IC1); Described mu balanced circuit and described oscillatory circuit, described self-checking circuit, described computing circuit, described output circuit interconnect respectively.

4. inductance type transducer according to claim 3 is characterized in that: described housing is provided with packoff in the outside of described magnetic core arrangement.