CN204228099U

CN204228099U - Point machine indication rod gap width monitoring system and current vortex sensor thereof

Info

Publication number: CN204228099U
Application number: CN201420521204.5U
Authority: CN
Inventors: 张长生; 王予平; 赵建明; 吴旺生; 陈志雄; 魏涛; 刘玉玲
Original assignee: China Railway Signal and Communication Shanghai Engineering Bureau Group Co Ltd
Current assignee: SHANGHAI XINHAI XINTONG INFORMATION TECHNOLOGY CO., LTD.
Priority date: 2014-09-11
Filing date: 2014-09-11
Publication date: 2015-03-25
Anticipated expiration: 2024-09-11

Abstract

The utility model discloses a kind of point machine indication rod gap width monitoring system and current vortex sensor thereof, and current vortex sensor comprises eddy current probe, current vortex circuit; Current vortex circuit comprises oscillator module, detection module, temperature compensation module, output buffer stage block; Current vortex sensor utilizes high frequency oscillating current to pass through eddy current probe, alternating magnetic field is produced at the head of eddy current probe, in the effective range of alternating magnetic field, have metallic conductor to move, magnetic field can be moved change with metal and change, and this change is converted to voltage or curent change; Oscillator module is responsible for producing oscillator signal and outputting to detection module; The ac voltage signal rectifying and wave-filtering that oscillator module exports by detection module becomes galvanic current to press signal; Temperature compensation module is in order to compensate temperature; Export buffer stage block to export in order to the d. c. voltage signal of upper level is amplified.The utility model can check post and checks that the gap between block breach changes by Real-time Obtaining.

Description

Point machine indication rod gap width monitoring system and current vortex sensor thereof

Technical field

The utility model belongs to electronic communication technology field, relates to a kind of point machine indication rod gap width monitoring system, particularly relates to a kind of current vortex sensor for the monitoring of point machine indication rod gap width.

Background technology

Whether normal the duty of railway switch machine is normally runs most important to guarantee railway, starting of following macro-axis heavy train, the further increase of freight volume, capital is caused the impact of track switch equipment more frequent, strengthen by shockproofness, wearing and tearing speed, Geometrical change, the research of railway switch machine working state monitoring is never interrupted for over ten years, domestic and international major parameter of monitoring goat duty is conversion resistance force and indication rod gap width at present, wherein conversion resistance force is the indirect performance of goat switch point housing degree, indication rod gap width is the direct performance of goat switch point housing degree.

The monitoring mode of existing indication rod gap width all has its weak point: as collision bead type sensor technology and spring displacement sensor technical approach sniffer fragile, photoelectric encoder technical approach vulnerable to pollution and reduce accuracy, reflective optical fiber displacement sensor technology and the excessive inconvenience of hall displacement transducer technical approach probe are installed, and camera technical approach does not quantize testing result needs artificial judgment indication rod gap width.

Simultaneously, existing conventional monitoring mode is camera technical approach, it needs along the special communication line of rail cloth one, system cost cost compare is high, and do not quantize testing result, need artificial judgment indication rod gap width, there is larger factor and individual subjective factor, out of true, error is large.

In view of this, nowadays in the urgent need to designing a kind of new point machine indication rod gap width monitoring system, to overcome the above-mentioned defect of existing system.

Utility model content

Technical problem to be solved in the utility model is: provide a kind of current vortex sensor for the monitoring of point machine indication rod gap width, post can be checked and checks that the gap between block breach changes by Real-time Obtaining, there is good real-time, and physical distance is quantized into magnitude of voltage to measure, captures the restriction that current vortex domestic and international diameter less than 6 millimeters at present probe can only detect 0 ~ 1 millimeter.

In addition, the utility model also provides a kind of point machine indication rod gap width monitoring system, post can be checked and checks that the gap between block breach changes by Real-time Obtaining, there is good real-time, and physical distance is quantized into magnitude of voltage to measure, captures the restriction that current vortex domestic and international diameter less than 6 millimeters at present probe can only detect 0 ~ 1 millimeter.

For solving the problems of the technologies described above, the utility model adopts following technical scheme:

A kind of current vortex sensor for the monitoring of point machine indication rod gap width, described current vortex sensor comprises: eddy current probe, current vortex circuit, and current vortex circuit comprises oscillator module, detection module, temperature compensation module, output buffer stage block;

Described eddy current probe is connected with oscillator module; Oscillator module, detection module, temperature compensation module, output buffer stage block connect successively, or oscillator module, detection module, export buffer stage block and connect successively, temperature compensation module connection oscillator module or detection module or export buffer stage block;

Described current vortex sensor utilizes high frequency oscillating current to pass through eddy current probe, the magnetic field of alternation is produced at the head of eddy current probe, in the effective range of this alternating magnetic field, there is metallic conductor to move, magnetic field can be moved change with metal and change, thus this change is converted to voltage or curent change and be delivered to the collector module of monitoring system;

Described eddy current probe adopts the coil around wide temperature FERRITE CORE;

Described oscillator module is responsible for producing oscillator signal, and outputs to detection module; Oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprise the first resistance R1, the second resistance R2, the 3rd resistance R3, the 9th resistance R9, the tenth resistance R10, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 7th electric capacity C7, the 8th electric capacity C8, amplifying triode Q1, and eddy current coil L1;

Wherein, the first end of the 7th electric capacity C7 connects power vd D, the second end ground connection; The first end of the 8th electric capacity C8 connects power vd D by the 9th resistance R9, the second end ground connection; 7th electric capacity C7 and the 8th electric capacity C8 and the 9th resistance R9 carries out filtering to power vd D;

The first end of the first resistance R1 connects power vd D by the 9th resistance R9, the second end ground connection of the second resistance R2, second end of the first resistance R1, the first end of the second resistance R2 connect the first end of the tenth resistance R10 respectively, second end of the tenth resistance R10 connects the base stage of amplifying triode Q1, for amplifying triode Q1 provides bias voltage;

Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects the first end of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4;

Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the first end of the tenth resistance R10, the second end ground connection of the first electric capacity C1;

Described detection module becomes galvanic current to press signal in order to the ac voltage signal rectifying and wave-filtering exported by oscillator module, and outputs to temperature compensation module;

Detection module mainly comprises the first diode D1, the second diode D2, the 5th electric capacity C5, the 6th electric capacity C6;

Wherein, the first end of the 5th electric capacity C5 connects second end of eddy current coil L1, and second end of the 5th electric capacity C5 connects the positive pole of the negative pole of the first diode D1, the second diode D2; The second end ground connection of the first diode D1, the negative pole of the second diode D2 connects the first end of the 6th electric capacity C6, the second end ground connection of the 6th electric capacity C6;

First diode D1, the second diode D2 are switching tubes, and the 5th electric capacity C5 plays isolated DC effect, and the 6th electric capacity C6 strobes;

Described temperature compensation module comprises the 4th resistance R4, the 5th resistance R5, the 6th thermistor R6 of negative temperature coefficient, the 11 resistance R11, the 12 thermistor R12, the 13 resistance R13;

The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the first end of the 11 resistance R11, the second end ground connection of the 6th thermistor R6; The second end branch of the 11 resistance R11 connects the first end of the 12 thermistor R12, the first end of the 13 resistance R13, second end of the 12 thermistor R12, the second end ground connection of the 13 resistance R13; The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 14 resistance R14, the 15 resistance R15, the 9th electric capacity C9, the tenth electric capacity C10;

Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1;

The positive pole of operational amplifier U1 connects second end of the 4th resistance R4, and the negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the first end of the 14 resistance R14, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7; Second end of the 14 resistance R14 connects first end, the first end of the 15 resistance R15, the first end of the tenth electric capacity C10 of the 9th electric capacity C9 respectively, the second end ground connection of second end of the 9th electric capacity C9, second end of the 15 resistance R15, the tenth electric capacity C10.

For a current vortex sensor for point machine indication rod gap width monitoring, described current vortex sensor comprises: eddy current probe, current vortex circuit, and described eddy current probe is connected with current vortex circuit; Current vortex circuit comprises oscillator module, detection module, temperature compensation module, output buffer stage block;

Described current vortex sensor utilizes high frequency oscillating current by eddy current probe, produces the magnetic field of alternation at the head of eddy current probe;

Described oscillator module is responsible for producing oscillator signal, and outputs to detection module; When receiving eddy current probe due to after metallic conductor moves the changes of magnetic field of generation, the alternating voltage amplitude of output is made to produce corresponding change;

Described detection module becomes galvanic current to press signal in order to the ac voltage signal rectifying and wave-filtering exported by oscillator module;

Described temperature compensation module in order on due to temperature variation on current vortex sensor or/and oscillator module produce impact compensate;

Described output buffer stage block exports in order to be amplified by the d. c. voltage signal of upper level.

As a kind of preferred version of the present utility model, described oscillator module mainly comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 9th resistance R9, the tenth resistance R10, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 7th electric capacity C7, the 8th electric capacity C8, amplifying triode Q1, and eddy current coil L1;

Wherein, the first end of the 7th electric capacity C7 connects power vd D, the second end ground connection; The first end of the 8th electric capacity C8 connects power vd D by the 9th resistance R9, the second end ground connection;

The first end of the first resistance R1 connects power vd D, the second end ground connection of the second resistance R2, second end of the first resistance R1, the first end of the second resistance R2 connect the first end of the tenth resistance R10 respectively, second end of the tenth resistance R10 connects the base stage of amplifying triode Q1, for amplifying triode Q1 provides bias voltage;

Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1;

First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the first end of the tenth resistance R10, the second end ground connection of the first electric capacity C1.

Described detection module mainly comprises the first diode D1, the second diode D2, the 5th electric capacity C5, the 6th electric capacity C6;

First diode D1, the second diode D2 are switching tubes, and the 5th electric capacity C5 plays isolated DC effect, and the 6th electric capacity C6 strobes.

As a kind of preferred version of the present utility model, described temperature compensation module comprises the 4th resistance R4, the 5th resistance R5, the 6th thermistor R6 of negative temperature coefficient, the 11 resistance, the 12 thermistor R12, the 13 resistance R13;

The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the first end of the 11 resistance R11, the second end ground connection of the 6th thermistor R6; The second end branch of the 11 resistance R11 connects the first end of the 12 thermistor R12, the first end of the 13 resistance R13, second end of the 12 thermistor R12, the second end ground connection of the 13 resistance R13.The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

As a kind of preferred version of the present utility model, described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 14 resistance R14, the 15 resistance R15, the 9th electric capacity C9, the tenth electric capacity C10;

As a kind of preferred version of the present utility model, described eddy current probe adopts the coil around wide temperature FERRITE CORE;

Described oscillator module, detection module, temperature compensation module, output buffer stage block connect successively;

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Wherein, the first end of the first resistance R1 connects power vd D, the second end ground connection of the second resistance R2, and second end of the first resistance R1, the first end of the second resistance R2 connect the base stage of amplifying triode Q1, respectively for amplifying triode Q1 provides bias voltage; Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects first end, the power vd D of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4; Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the base stage of amplifying triode Q1, the second end ground connection of the first electric capacity C1;

Described detection module mainly comprises the first diode D1, the second diode D2, the 5th electric capacity C5, the 6th electric capacity C6; Wherein, the first end of the 5th electric capacity C5 connects second end of eddy current coil L1, and second end of the 5th electric capacity C5 connects the positive pole of the negative pole of the first diode D1, the second diode D2; The second end ground connection of the first diode D1, the negative pole of the second diode D2 connects the first end of the 6th electric capacity C6, the second end ground connection of the 6th electric capacity C6; First diode D1, the second diode D2 are switching tubes, and the 5th electric capacity C5 plays isolated DC effect, and the 6th electric capacity C6 strobes;

Described temperature compensation module comprises the 6th thermistor R6 of the 4th resistance R4, the 5th resistance R5, negative temperature coefficient; The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6; The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8; Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1; The positive pole of operational amplifier U1 connects second end of the 4th resistance R4, and the negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7.

As a kind of preferred version of the present utility model, described temperature compensation module connection oscillator module, oscillator module, detection module, output buffer stage block connect successively;

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Described temperature compensation module connection oscillator module, temperature compensation module comprises the 6th thermistor R6 of the 5th resistance R5, negative temperature coefficient; The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

Wherein, the first end of the first resistance R1 connects power vd D, and second end of the first resistance R1 connects first end, the first end of the first electric capacity C1, the base stage of amplifying triode Q1 of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6; Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects first end, the power vd D of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4; Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the base stage of amplifying triode Q1, the second end ground connection of the first electric capacity C1;

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 16 resistance R16, the 17 resistance R17; Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1; The first end of the 16 resistance R16 connects the negative pole of the second diode D2, and second end of the 16 resistance R16 connects the first end of the 17 resistance R17, the positive pole of operational amplifier U1, the second end ground connection of the 17 resistance R17; The negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7.

As a kind of preferred version of the present utility model, described oscillator module, detection module, output buffer stage block, temperature compensation module connect successively;

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 16 resistance R16, the 17 resistance R17; Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1; The first end of the 16 resistance R16 connects the negative pole of the second diode D2, and second end of the 16 resistance R16 connects the first end of the 17 resistance R17, the positive pole of operational amplifier U1, the second end ground connection of the 17 resistance R17; The negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7;

Described temperature compensation module comprises the 6th thermistor R6 of the 4th resistance R4, the 5th resistance R5, negative temperature coefficient; The output terminal of the first end concatenation operation amplifier U1 of described 4th resistance R4, second end of the 4th resistance R4 connects the first end of the 5th resistance R5, the signal output part of current vortex sensor; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6.The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Described temperature compensation module connection oscillator module, temperature compensation module comprises the 6th thermistor R6 of the 5th resistance R5, negative temperature coefficient;

Wherein, the first end of the first resistance R1 connects power vd D, and second end of the first resistance R1 connects the first end of the second resistance R2, the first end of the first electric capacity C1, the base stage of amplifying triode Q1; The second end ground connection of the second resistance R2; Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects first end, the power vd D of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4; The emitter of amplifying triode Q1 connects the first end of the 5th resistance R5, and second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6; Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the base stage of amplifying triode Q1, the second end ground connection of the first electric capacity C1;

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 16 resistance R16, the 17 resistance R17; Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1; The first end of the 16 resistance R16 connects the negative pole of the second diode D2, and second end of the 16 resistance R16 connects the first end of the 17 resistance R17, the positive pole of operational amplifier U1, the second end ground connection of the 17 resistance R17; The negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7.The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

For a monitoring system for point machine indication rod gap width, described monitoring system comprises:

Above-mentioned current vortex sensor;

Collector, connects one or more current vortex sensor, in order to gather the data that described current vortex sensor exports;

Remote monitoring center, connects one or more collector, receives the data that described collector sends.

As a kind of preferred version of the present utility model, described collector comprises first microprocessor, the first data memory module, A/D acquisition module, the first power line carrier module, the first power module; Described first data memory module, A/D acquisition module, the first power line carrier module, the first power module are connected with first microprocessor respectively; Described collector connects described current vortex sensor by A/D acquisition module, obtains the data of gap width.

The beneficial effects of the utility model are: the utility model proposes for point machine indication rod gap width monitoring system and current vortex sensor thereof, the gap width of point machine indication rod can be accurately measured.

The utility model by arranging thermistor (NTC) (as the 6th resistance R6 and the 12 resistance R12) in temperature-compensation circuit, according to triode physical characteristics, triode along with temperature from low to high, the PN junction of triode narrows, then make triode times magnification factor beta increase; Amplifying triode Q1 along with temperature from low to high, the collector current of amplifying triode Q1 constantly increases, and finally causes the voltage signal of input amplifier U1 to increase along with temperature from low to high.Eddy-current coils L1 is because selection and its physical characteristics are along with exported the from low to high voltage signal of temperature is also in increase.And the 6th resistance R6 and the 12 resistance R12 is thermistor (NTC) in temperature-compensation circuit, along with temperature from low to high, the resistance of the 6th resistance R6 and the 12 resistance R12 is descending, the overall resistance of the resistor network causing the 6th resistance R6, the 11 resistance R11, the 12 resistance R12, the 13 resistance R13 to form diminishes, because resistance diminishes, electric current is constant, according to U=IR, voltage signal then diminishes, and the voltage signal of input operational amplifier U1 just diminishes.Along with temperature from low to high, amplifying triode Q1 amplification coefficient becomes large, eddy-current coils L1 voltage signal that output characteristics causes becomes large, the voltage signal that simultaneous temperature compensating circuit adjusts diminishes, such voltage is increase tendency, a voltage is minimizing trend, mutually neutralizes counteracting between two, and the voltage signal temperature influence of the input operational amplifier U1 made and output reduces or not temperature influence.Otherwise, temperature from high to low, amplifying triode Q1 amplification coefficient reduces, eddy-current coils L1 exports and voltage signal is diminished, and thermistor resistance temperature step-down and resistance become and make greatly voltage signal become large, be still a voltage is increase tendency, a voltage is minimizing trend, mutually neutralize counteracting between two, voltage signal tends towards stability, and temperature influence diminishes.The utility model can improve the degree of accuracy of temperature compensation, improves the precision to gap width monitoring better.

The current vortex sensor for the monitoring of point machine indication rod gap width that the utility model proposes, can obtain in real time and be moved by metallic conductor and the changes of magnetic field that produces, and this change is passed to collector module, have good real-time.Current vortex sensor is the key position of probe, can work under the rugged surroundings that the temperature difference and humidity change greatly out of doors, and its detection represents that the accuracy of rod notch width and sensitivity are wanted to meet actual needs.Current vortex sensor reliable long-term working is good, highly sensitive simultaneously, resolution is high, fast response time, interference resistance by force, are not subject to the impact of the media such as greasy dirt, structure is simple, easy for installation.

The utility model can be suitable for various model goat, breach really can be quantized, and is equivalent to a milscale in real-time measurement; Degree of accuracy of the present utility model is high, and resolution can reach 0.01 millimeter, and precision also can reach 0.01 millimeter at normal temperatures.Meanwhile, the utility model monitoring system can the operationally state of various conversion and the action of real-time complete monitoring goat.The utility model also has the self-diagnostic function of equipment own, and any connecting line that centralized monitor is connected with collector and collector is connected with current vortex sensor interrupts self reporting to the police, and the fault of equipment own and element go bad and also can report to the police.Native system mentality of designing is that monitoring should not alarm set point, it not this alarm set point of monitoring, so for system itself, only have breach to be in normal position just not report to the police, other any states all can be reported to the police, and any connecting line that centralized monitor is connected with collector and collector is connected with current vortex sensor interrupts all can not meet breach is in entopic data.

In order to improve monitoring accuracy, reduce the error brought of temperature variation and improve monitoring distance, at of a goat breach, the above current vortex sensor of 2 covers can be installed.The data of 2 cover current vortex sensors can contrast, and the data if any 1 cover current vortex sensor are greater than the value of setting, will report to the police; Namely can not be greater than the certain limit of normal value, otherwise just belong to the fault of equipment own or the element of equipment own and go bad.

The utility model supervisory system can also with each Railway Bureau at present centralized signal supervision systems connection; And hand-held set can be configured realize real time monitoring function; In addition, the data transmission of the utility model monitoring system and power supply share a pair cable, save circuit.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the utility model current vortex sensor in embodiment one.

Fig. 2 is the circuit diagram of the utility model current vortex sensor in embodiment three.

Fig. 3 is the circuit diagram of the utility model current vortex sensor in embodiment four.

Fig. 4 is the circuit diagram of the utility model current vortex sensor in embodiment five.

Fig. 5 is the circuit diagram of the utility model current vortex sensor in embodiment six.

Fig. 6 is the composition schematic diagram of the utility model monitoring system.

Fig. 7 is the composition schematic diagram of collector in the utility model monitoring system.

Fig. 8 is the composition schematic diagram of Centralizing inspection manager in the utility model monitoring system.

Fig. 9 is the composition schematic diagram of wireless handset in the utility model monitoring system.

Embodiment

Preferred embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.

Embodiment one

Refer to Fig. 1, the utility model discloses a kind of current vortex sensor for the monitoring of point machine indication rod gap width, and described current vortex sensor comprises: eddy current probe, current vortex circuit, and described eddy current probe is connected with current vortex circuit; Current vortex circuit comprises oscillator module, detection module, temperature compensation module, output buffer stage block.

Described current vortex sensor utilizes high frequency oscillating current to pass through eddy current probe, the magnetic field of alternation is produced at the head of eddy current probe, in the effective range of this alternating magnetic field, there is metallic conductor to move, magnetic field can be moved change with metal and change, thus this change is converted to voltage or curent change and be delivered to the collector module of monitoring system.

Described oscillator module is responsible for producing oscillator signal, and outputs to detection module; When receiving eddy current probe due to after metallic conductor moves the changes of magnetic field of generation, the alternating voltage amplitude of output is made to produce corresponding change.Described detection module becomes galvanic current to press signal in order to the ac voltage signal rectifying and wave-filtering exported by oscillator module.Described temperature compensation module in order on due to temperature variation on current vortex sensor or/and oscillator module produce impact compensate.Described output buffer stage block exports in order to be amplified by the d. c. voltage signal of upper level.Described eddy current probe can adopt the coil around wide temperature FERRITE CORE.

Specifically as shown in Figure 1, described oscillator module mainly comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 9th resistance R9, the tenth resistance R10, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 7th electric capacity C7, the 8th electric capacity C8, amplifying triode Q1, and eddy current coil L1.Wherein, the first end of the 7th electric capacity C7 connects power vd D, the second end ground connection; The first end of the 8th electric capacity C8 connects power vd D by the 9th resistance R9, the second end ground connection.The first end of the first resistance R1 connects power vd D, the second end ground connection of the second resistance R2, second end of the first resistance R1, the first end of the second resistance R2 connect the first end of the tenth resistance R10 respectively, second end of the tenth resistance R10 connects the base stage of amplifying triode Q1, for amplifying triode Q1 provides bias voltage.Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects the first end of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4.Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1.First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the first end of the tenth resistance R10, the second end ground connection of the first electric capacity C1.

Described detection module mainly comprises the first diode D1, the second diode D2, the 5th electric capacity C5, the 6th electric capacity C6.Wherein, the first end of the 5th electric capacity C5 connects second end of eddy current coil L1, and second end of the 5th electric capacity C5 connects the positive pole of the negative pole of the first diode D1, the second diode D2; The second end ground connection of the first diode D1, the negative pole of the second diode D2 connects the first end of the 6th electric capacity C6, the second end ground connection of the 6th electric capacity C6.First diode D1, the second diode D2 are switching tubes, and the 5th electric capacity C5 plays isolated DC effect, and the 6th electric capacity C6 strobes.

Described temperature compensation module comprises the 4th resistance R4, the 5th resistance R5, the 6th thermistor R6 of negative temperature coefficient, the 11 resistance, the 12 thermistor R12, the 13 resistance R13.The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the first end of the 11 resistance R11, the second end ground connection of the 6th thermistor R6; The second end branch of the 11 resistance R11 connects the first end of the 12 thermistor R12, the first end of the 13 resistance R13, second end of the 12 thermistor R12, the second end ground connection of the 13 resistance R13.

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 14 resistance R14, the 15 resistance R15, the 9th electric capacity C9, the tenth electric capacity C10.Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1.The positive pole of operational amplifier U1 connects second end of the 4th resistance R4, and the negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the first end of the 14 resistance R14, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7; Second end of the 14 resistance R14 connects first end, the first end of the 15 resistance R15, the first end of the tenth electric capacity C10 of the 9th electric capacity C9 respectively, the second end ground connection of second end of the 9th electric capacity C9, second end of the 15 resistance R15, the tenth electric capacity C10.

Described temperature compensation module is in order to compensate amplifying triode Q1 and eddy-current coils L1.According to triode physical characteristics, triode along with temperature from low to high, the PN junction of triode narrows, then make triode times magnification factor beta increase; Amplifying triode Q1 along with temperature from low to high, the collector current of amplifying triode Q1 constantly increases, and finally causes the voltage signal of input amplifier U1 to increase along with temperature from low to high.Eddy-current coils L1 is because selection and its physical characteristics are along with exported the from low to high voltage signal of temperature is also in increase.And the 6th resistance R6 and the 12 resistance R12 is thermistor (NTC) in temperature-compensation circuit, along with temperature from low to high, the resistance of the 6th resistance R6 and the 12 resistance R12 is descending, the overall resistance of the resistor network causing the 6th resistance R6, the 11 resistance R11, the 12 resistance R12, the 13 resistance R13 to form diminishes, because resistance diminishes, electric current is constant, according to U=IR, voltage signal then diminishes, and the voltage signal of input operational amplifier U1 just diminishes.Along with temperature from low to high, amplifying triode Q1 amplification coefficient becomes large, eddy-current coils L1 voltage signal that output characteristics causes becomes large, the voltage signal that simultaneous temperature compensating circuit adjusts diminishes, such voltage is increase tendency, a voltage is minimizing trend, mutually neutralizes counteracting between two, and the voltage signal temperature influence of the input operational amplifier U1 made and output reduces or not temperature influence.Otherwise, temperature from high to low, amplifying triode Q1 amplification coefficient reduces, eddy-current coils L1 exports and voltage signal is diminished, and thermistor resistance temperature step-down and resistance become and make greatly voltage signal become large, be still a voltage is increase tendency, a voltage is minimizing trend, mutually neutralize counteracting between two, voltage signal tends towards stability, and temperature influence diminishes.Utilize two thermistor NTC (certainly can adopt more thermistor NTC as required) by the program, the degree of accuracy of temperature compensation can be improved further, improve the precision to gap width monitoring better.

Embodiment two

Described oscillator module is responsible for producing oscillator signal, and outputs to detection module; When receiving eddy current probe due to after metallic conductor moves the changes of magnetic field of generation, the alternating voltage amplitude of output is made to produce corresponding change.

Described detection module becomes galvanic current to press signal in order to the ac voltage signal rectifying and wave-filtering exported by oscillator module.Described temperature compensation module is in order to compensate temperature.Described output buffer stage block exports in order to be amplified by the d. c. voltage signal of upper level.

Embodiment three

Refer to Fig. 2, in the present embodiment, described oscillator module, detection module, temperature compensation module, output buffer stage block connect successively.

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Wherein, the first end of the first resistance R1 connects power vd D, the second end ground connection of the second resistance R2, and second end of the first resistance R1, the first end of the second resistance R2 connect the base stage of amplifying triode Q1, respectively for amplifying triode Q1 provides bias voltage; Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects first end, the power vd D of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4; Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the base stage of amplifying triode Q1, the second end ground connection of the first electric capacity C1.

Described detection module mainly comprises the first diode D1, the second diode D2, the 5th electric capacity C5, the 6th electric capacity C6; Wherein, the first end of the 5th electric capacity C5 connects second end of eddy current coil L1, and second end of the 5th electric capacity C5 connects the positive pole of the negative pole of the first diode D1, the second diode D2; The second end ground connection of the first diode D1, the negative pole of the second diode D2 connects the first end of the 6th electric capacity C6, the second end ground connection of the 6th electric capacity C6; First diode D1, the second diode D2 are switching tubes, and the 5th electric capacity C5 plays isolated DC effect, and the 6th electric capacity C6 strobes.

Described temperature compensation module comprises the 6th thermistor R6 of the 4th resistance R4, the 5th resistance R5, negative temperature coefficient; The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6.

Described temperature compensation module is in order to compensate amplifying triode Q1 and eddy-current coils L1.According to triode physical characteristics, triode along with temperature from low to high, the PN junction of triode narrows, then make triode times magnification factor beta increase; Amplifying triode Q1 along with temperature from low to high, the collector current of amplifying triode Q1 constantly increases, and finally causes the voltage signal of input amplifier U1 to increase along with temperature from low to high.Eddy-current coils L1 is because selection and its physical characteristics are along with exported the from low to high voltage signal of temperature is also in increase.And the 6th resistance R6 is thermistor (NTC) in temperature-compensation circuit, along with temperature from low to high, the resistance of the 6th resistance R6 is descending, cause the 6th resistance R6, the overall resistance of resistor network that the 5th resistance R5 forms diminishes, because resistance diminishes, electric current is constant, according to U=IR, voltage signal then diminishes, and the voltage signal of input operational amplifier U1 just diminishes.Along with temperature from low to high, amplifying triode Q1 amplification coefficient becomes large, eddy-current coils L1 voltage signal that output characteristics causes becomes large, the voltage signal that simultaneous temperature compensating circuit adjusts diminishes, such voltage is increase tendency, a voltage is minimizing trend, mutually neutralizes counteracting between two, and the voltage signal temperature influence of the input operational amplifier U1 made and output reduces or not temperature influence.Otherwise, temperature from high to low, amplifying triode Q1 amplification coefficient reduces, eddy-current coils L1 exports and voltage signal is diminished, and thermistor resistance temperature step-down and resistance become and make greatly voltage signal become large, be still a voltage is increase tendency, a voltage is minimizing trend, mutually neutralize counteracting between two, voltage signal tends towards stability, and temperature influence diminishes.The degree of accuracy of temperature compensation can be improved by the program, improve the precision to gap width monitoring better.

Embodiment four

Refer to Fig. 3, in the present embodiment, described temperature compensation module connection oscillator module, oscillator module, detection module, output buffer stage block connect successively.

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Described temperature compensation module connection oscillator module, temperature compensation module comprises the 6th thermistor R6 of the 5th resistance R5, negative temperature coefficient.

Wherein, the first end of the first resistance R1 connects power vd D, and second end of the first resistance R1 connects first end, the first end of the first electric capacity C1, the base stage of amplifying triode Q1 of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6; Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects first end, the power vd D of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4; Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the base stage of amplifying triode Q1, the second end ground connection of the first electric capacity C1.

Embodiment five

Refer to Fig. 4, in the present embodiment, described oscillator module, detection module, output buffer stage block, temperature compensation module connect successively.

Described temperature compensation module comprises the 6th thermistor R6 of the 4th resistance R4, the 5th resistance R5, negative temperature coefficient; The output terminal of the first end concatenation operation amplifier U1 of described 4th resistance R4, second end of the 4th resistance R4 connects the first end of the 5th resistance R5, the signal output part of current vortex sensor; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6.

Embodiment six

Refer to Fig. 5, in the present embodiment, described temperature compensation module connection oscillator module, oscillator module, detection module, output buffer stage block connect successively.

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Described temperature compensation module connection oscillator module, temperature compensation module comprises the 6th thermistor R6 of the 5th resistance R5, negative temperature coefficient.

Wherein, the first end of the first resistance R1 connects power vd D, and second end of the first resistance R1 connects the first end of the second resistance R2, the first end of the first electric capacity C1, the base stage of amplifying triode Q1; The second end ground connection of the second resistance R2; Second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, eddy current coil L1 form bikini oscillatory circuit; The first end of the second electric capacity connects first end, the power vd D of eddy current coil L1, and second end of the second electric capacity C2 connects the collector of amplifying triode Q1; The first end of the 3rd electric capacity C3 connects second end of eddy current coil L1, and second end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4 connect the emitter of amplifying triode Q1, the second end ground connection of the 4th electric capacity C4; The emitter of amplifying triode Q1 connects the first end of the 5th resistance R5, and second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6; Amplifying triode Q1 plays a part to amplify oscillator signal; The first end of the 3rd resistance R3 connects the emitter of amplifying triode Q1, as the operating load of amplifying triode Q1; First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the base stage of amplifying triode Q1, the second end ground connection of the first electric capacity C1.

Embodiment seven

Refer to Fig. 6, the utility model also discloses a kind of for point machine indication rod gap width monitoring system, and described monitoring system comprises:

Described monitoring system comprises: current vortex sensor 10, collector 20, Centralizing inspection manager 30, remote monitoring center 40, wireless handset 50; Current vortex sensor 10, collector 20, Centralizing inspection manager 30, wireless handset 50 can be multiple usually.A collector 20 can connect multiple current vortex sensor 10, Centralizing inspection manager 30 and can connect multiple collector 20, and remote monitoring center 40 can connect one or more Centralizing inspection manager 30.

The composition of current vortex sensor 10 can with reference to the description of above embodiment.

[collector]

Collector 20 connects one or more current vortex sensor 10, in order to gather the data that described current vortex sensor 10 exports.

Refer to Fig. 7, described collector 20 comprises first microprocessor 21, first power line carrier module 22, first wireless communication module 23, A/D acquisition module 24, first data memory module 25, first power module 26.Described first power line carrier module 22, first wireless communication module 23, A/D acquisition module 24, first data memory module 25, first power module 26 are connected with described first microprocessor 22 respectively; Described first power line carrier module 22 connects Centralizing inspection manager 30, and described A/D acquisition module 24 connects current vortex sensor 10.

[Centralizing inspection manager]

Centralizing inspection manager 30 connects one or more collector 20 by line of electric force, receives in power carrier mode the data that collector 20 collects.

Refer to Fig. 8, described Centralizing inspection manager comprises the second microprocessor 32, centralized displaying screen 31, second data memory module 35, second power line carrier module 34, second source module 37, second communication module 36, liquid crystal serial communication modular 33.

Described secondth data memory module 35, second power line carrier module 34, second source module 37, second communication module 36, liquid crystal serial communication modular 33 are connected with the second microprocessor 32 respectively, and liquid crystal serial communication modular 33 is also connected with centralized displaying screen 31.Described Centralizing inspection manager 30 connects remote monitoring center 40 by second communication module 36, connects collector 20 by the second power line carrier module 34.In the present embodiment, described second communication module 36 comprises RS485 serial port unit, RS422 serial port unit, tcp/ip communication unit.

[remote monitoring center]

Remote monitoring center 40 connects one or more Centralizing inspection manager 30, receives the data that described Centralizing inspection manager 30 sends.

[wireless handset]

Refer to Fig. 9, described wireless handset 50 comprises the 3rd microprocessor 51, the 3rd data memory module 54, the 3rd wireless communication module 52, LCD MODULE 56, the 3rd power module 53, input through keyboard module 55.Described 3rd data memory module 54, the 3rd wireless communication module 52, LCD MODULE 56, the 3rd power module 53, input through keyboard module 55 are connected with the 3rd microprocessor 51 respectively.Wireless handset 50 connects described collector 20 by the 3rd wireless communication module 52, obtains the data that collector 20 gathers.Its input through keyboard module (can certainly be other load modules) can also be passed through simultaneously and send control command to collector, management collector.

In sum, the current vortex sensor for the monitoring of point machine indication rod gap width that the utility model proposes, can accurately measure the gap width of point machine indication rod.The utility model can improve the degree of accuracy of temperature compensation, improves the precision to gap width monitoring better.

Here description of the present utility model and application is illustrative, not wants by scope restriction of the present utility model in the above-described embodiments.Distortion and the change of embodiment disclosed are here possible, are known for the replacement of embodiment those those of ordinary skill in the art and the various parts of equivalence.Those skilled in the art are noted that when not departing from spirit of the present utility model or essential characteristic, the utility model can in other forms, structure, layout, ratio, and to realize with other assembly, material and parts.When not departing from the utility model scope and spirit, can other distortion be carried out here to disclosed embodiment and change.

Claims

1. the current vortex sensor for the monitoring of point machine indication rod gap width, it is characterized in that, described current vortex sensor comprises: eddy current probe, current vortex circuit, and current vortex circuit comprises oscillator module, detection module, temperature compensation module, output buffer stage block;

The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the first end of the 11 resistance R11, the second end ground connection of the 6th thermistor R6; The second end branch of the 11 resistance R11 connects the first end of the 12 thermistor R12, the first end of the 13 resistance R13, second end of the 12 thermistor R12, the second end ground connection of the 13 resistance R13;

The positive pole of operational amplifier U1 connects second end of the 4th resistance R4, and the negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the first end of the 14 resistance R14, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7; Second end of the 14 resistance R14 connects first end, the first end of the 15 resistance R15, the first end of the tenth electric capacity C10 of the 9th electric capacity C9 respectively, the second end ground connection of second end of the 9th electric capacity C9, second end of the 15 resistance R15, the tenth electric capacity C10;

Described temperature compensation module in order on due to temperature variation on current vortex sensor or/and oscillator module produce impact compensate.

2., for a current vortex sensor for point machine indication rod gap width monitoring, it is characterized in that, described current vortex sensor comprises: eddy current probe, current vortex circuit, and described eddy current probe is connected with current vortex circuit; Current vortex circuit comprises oscillator module, detection module, temperature compensation module, output buffer stage block;

3. the current vortex sensor for the monitoring of point machine indication rod gap width according to claim 2, is characterized in that:

Described oscillator module mainly comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the 9th resistance R9, the tenth resistance R10, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 7th electric capacity C7, the 8th electric capacity C8, amplifying triode Q1, and eddy current coil L1;

Wherein, the first end of the 7th electric capacity C7 connects power vd D, the second end ground connection; The first end of the 8th electric capacity C8 connects power vd D by the 9th resistance R9, the second end ground connection; 7th electric capacity C7 and the 8th electric capacity C8 and the 9th resistance R9 carries out filtering to power vd D; Tenth resistance R10 intensifier circuit stability action;

First electric capacity C1 is shunt capacitance, and the first end of the first electric capacity C1 connects the first end of the tenth resistance R10, the second end ground connection of the first electric capacity C1;

Described temperature compensation module comprises the 4th resistance R4, the 5th resistance R5, the 6th thermistor R6 of negative temperature coefficient, the 11 resistance, the 12 thermistor R12, the 13 resistance R13; The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the first end of the 11 resistance R11, the second end ground connection of the 6th thermistor R6; The second end branch of the 11 resistance R11 connects the first end of the 12 thermistor R12, the first end of the 13 resistance R13, second end of the 12 thermistor R12, the second end ground connection of the 13 resistance R13;

Described output buffer stage block comprises operational amplifier U1, the 7th resistance R7, the 8th resistance R8, the 14 resistance R14, the 15 resistance R15, the 9th electric capacity C9, the tenth electric capacity C10; Wherein, operational amplifier U1 mainly plays isolation features, other three parts exported in buffer stage block and current vortex circuit is kept apart; 7th resistance R7, the 8th resistance R8 are the negative-feedback circuits of operational amplifier U1; The positive pole of operational amplifier U1 connects second end of the 4th resistance R4, and the negative pole of operational amplifier U1 connects the first end of the 7th resistance R7, the second end ground connection of the 7th resistance R7; The output terminal of operational amplifier U1 connects second end of the 8th resistance R8, the first end of the 14 resistance R14, the negative pole of first end concatenation operation amplifier U1 of the 8th resistance R8, the first end of the 7th resistance R7; Second end of the 14 resistance R14 connects first end, the first end of the 15 resistance R15, the first end of the tenth electric capacity C10 of the 9th electric capacity C9 respectively, the second end ground connection of second end of the 9th electric capacity C9, second end of the 15 resistance R15, the tenth electric capacity C10.

4. the current vortex sensor for the monitoring of point machine indication rod gap width according to claim 2, is characterized in that:

Described temperature compensation module comprises the 6th thermistor R6 of the 4th resistance R4, the 5th resistance R5, negative temperature coefficient; The first end of described 4th resistance R4 connects the negative pole of the second diode D2, the first end of the 6th electric capacity C6, and second end of the 4th resistance R4 connects the first end of the 5th resistance R5; Second end of the 5th resistance R5 connects the first end of the 6th thermistor R6, the second end ground connection of the 6th thermistor R6;

5. the current vortex sensor for the monitoring of point machine indication rod gap width according to claim 2, is characterized in that:

Described temperature compensation module connection oscillator module, oscillator module, detection module, output buffer stage block connect successively;

Described oscillator module adopts capacitance connecting three point type oscillator principle, mainly comprises the first resistance R1, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, amplifying triode Q1, and eddy current coil L1; Described temperature compensation module connection oscillator module, temperature compensation module comprises the 6th thermistor R6 of the 5th resistance R5, negative temperature coefficient;

6. the current vortex sensor for the monitoring of point machine indication rod gap width according to claim 2, is characterized in that:

Described oscillator module, detection module, output buffer stage block, temperature compensation module connect successively;

7. the current vortex sensor for the monitoring of point machine indication rod gap width according to claim 2, is characterized in that:

8. a point machine indication rod gap width monitoring system, is characterized in that, described monitoring system comprises:

The current vortex sensor that one of claim 1 to 7 is described;

9. monitoring system according to claim 8, is characterized in that:

Described collector comprises first microprocessor, the first data memory module, A/D acquisition module, the first power line carrier module, the first power module;

Described first data memory module, A/D acquisition module, the first power line carrier module, the first power module are connected with first microprocessor respectively; Described collector connects described current vortex sensor by A/D acquisition module, obtains the data of gap width.