CN203164351U - A pile and electric leakage detecting circuit - Google Patents

A pile and electric leakage detecting circuit Download PDF

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Publication number
CN203164351U
CN203164351U CN 201320167784 CN201320167784U CN203164351U CN 203164351 U CN203164351 U CN 203164351U CN 201320167784 CN201320167784 CN 201320167784 CN 201320167784 U CN201320167784 U CN 201320167784U CN 203164351 U CN203164351 U CN 203164351U
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resistance
operational amplifier
source
voltage
output
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徐雪峰
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Beijing Machinery Equipment Research Institute
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Beijing Machinery Equipment Research Institute
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Abstract

The utility model discloses a pile and electric leakage detecting circuit comprising an operational amplifier N1, resistors from R0 to R10, a reference source N2, and a photoelectric coupler N3. The constituent parts are connected through printed board conductive printed tapes. A detecting circuit detects the loop resistance between a vehicle body ground and a measuring ground. After the loop resistance is divided and amplified by the operational amplifier, signals with high level and low level are transmitted to an external controller. According to the detected signals with high level and low level, the external controller gives an audible and visual alarm and automatically cuts off alternating current input so as to protect the personal safety of an operator. The pile and electric leakage detecting circuit with simple circuit structure and high reliability has functions of automatically detecting the state of a pile and giving the audible and visual alarm and is suitable for the detection of the states of various vehicle piles.

Description

A kind of pile and electric-leakage detection circuit
Technical field
The present invention relates to a kind of testing circuit, particularly a kind of pile and electric-leakage detection circuit.
Background technology
The vehicle-mounted electric power system of military vehicle is that last installing is equipped with power supply by diesel generator set or civil power mainly, because system inserts the 220V AC power, earth leakage protection is personnel safety guard's emphasis, therefore needs system's reliable ground.At present the main method that adopts the resistance value between ohmmeter manual measurement car body and pile detects whether reliable ground of vehicle, and the measuring resistance value value of meeting the demands is then confirmed system's reliable ground when institute.When loose contact appearred in the vehicle ground wire, electrical equipment can not detect voluntarily can not take safeguard measure, therefore there was potential safety hazard in the operator.
The utility model content
The purpose of this utility model is to provide a kind of pile and electric-leakage detection circuit, the problem that can't detect automatically and protect when solving the vehicle ground loose contact.
A kind of pile and electric-leakage detection circuit comprise: operational amplifier N1, resistance R 0, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, reference source N2, photoelectrical coupler N3.Wherein, photoelectrical coupler N3 comprises: light emitting diode V1 and phototriode V2.
Resistance R 0 one ends are connected by electric connector with car body, and resistance R 0 other end is connected with measurement ground GND; Resistance R 1 one ends are connected with power supply Vcc, and resistance R 1 other end is connected with the cathode terminal of reference source N2; Resistance R 2 one ends are connected by electric connector with car body, and resistance R 2 other ends are connected with the cathode terminal of reference source N2; The two ends of resistance R 3 are connected with reference edge with the cathode terminal of reference source N2 respectively; The two ends of resistance R 4 are connected with reference edge with the positive terminal of reference source N2 respectively; One end of resistance R 5 is connected with the cathode terminal of reference source N2, and resistance R 5 other ends are connected with the normal phase input end of operational amplifier N1; One end of resistance R 6 is connected with the positive terminal of reference source N2, and resistance R 6 other ends are connected with the normal phase input end of operational amplifier N1; One end of resistance R 7 is connected with the positive terminal of reference source N2, and resistance R 7 other ends are connected with the inverting input of operational amplifier N1; One end of resistance R 8 is connected with the inverting input of operational amplifier N1, and resistance R 8 other ends are connected by electric connector with car body; One end of resistance R 9 is connected with power supply, and resistance R 9 other ends are connected with the positive terminal of light emitting diode V1; One end of resistance R 10 is connected with power supply Vcc1, and resistance R 10 other ends are connected with the collector terminal of phototriode V2; The output terminal of operational amplifier N1 is connected with the negative pole end of light emitting diode V1; The positive terminal of reference source N2 is connected with measurement ground GND; The collector terminal of phototriode V2 is connected with Vout; The emitter terminal of phototriode V2 is connected with signal ground GND1.Above-mentioned components and parts are printed band by the printed board conduction and are connected.
During testing circuit work, power supply Vcc is added to the cathode terminal of reference source N2 through resistance R 1, reference source N2 output reference voltage after resistance R 3 and resistance R 4 voltage matches is Vc, and reference voltage V c is output operational amplifier N1 in-phase end reference voltage V p after resistance R 5 and resistance R 6 dividing potential drops.Reference voltage V c output voltage after resistance R 0 and resistance R 2 dividing potential drops is car body voltage Vg, and car body voltage Vg is output operational amplifier N1 inverting input reference voltage V n after resistance R 7 and resistance R 8 dividing potential drops.When Vp<Vn, the operational amplifier output level is turned into low level, the output terminal of power supply Vcc and operational amplifier exists potential difference (PD) that thereby the light emitting diode V1 of current flowing resistance R9, photoelectrical coupler N3 is arranged, light emitting diode V1 this moment has electric current to flow through that thereby operate as normal is sent light signal and with the phototriode V2 conducting in the photoelectrical coupler N3, Vout and the GND1 output low level of joining.The Vout signal is defeated by peripheral control unit by the IO oral instructions, and peripheral control unit detects to be lighted pile behind the low level signal and accomplished fluently pilot lamp.As Vp〉during Vn, the operational amplifier output level is turned into high level, and this moment, the light emitting diode V1 no current of photoelectrical coupler N3 flow through, the not conducting of phototriode V2 in the photoelectrical coupler N3, power supply Vcc is through R10 and the Vout output high level that joins.The Vout signal is defeated by peripheral control unit by the IO oral instructions, and peripheral control unit sends audible and visual alarm and cuts off the alternating current input automatically after detecting high level signal, thus protection operating personnel's personal safety.
The utility model circuit structure is simple, and the reliability height has automatic detection pile state and sends the function of sound and light alarm, is applicable to various military vehicle pile state-detection.
Description of drawings
The structural representation of a kind of pile of Fig. 1 and electric-leakage detection circuit.
Embodiment
A kind of pile and electric-leakage detection circuit comprise: operational amplifier N1, resistance R 0-R10, reference source N2, photoelectrical coupler N3.Wherein, photoelectrical coupler N3 comprises: light emitting diode V1 and phototriode V2.
Resistance R 0 one ends are connected by electric connector with car body, and resistance R 0 other end is connected with measurement ground GND; Resistance R 1 one ends are connected with power supply Vcc, and resistance R 1 other end is connected with the cathode terminal of reference source N2; Resistance R 2 one ends are connected by electric connector with car body, and resistance R 2 other ends are connected with the cathode terminal of reference source N2; The two ends of resistance R 3 are connected with reference edge with the cathode terminal of reference source N2 respectively; The two ends of resistance R 4 are connected with reference edge with the positive terminal of reference source N2 respectively; One end of resistance R 5 is connected with the cathode terminal of reference source N2, and resistance R 5 other ends are connected with the normal phase input end of operational amplifier N1; One end of resistance R 6 is connected with the positive terminal of reference source N2, and resistance R 6 other ends are connected with the normal phase input end of operational amplifier N1; One end of resistance R 7 is connected with the positive terminal of reference source N2, and resistance R 7 other ends are connected with the inverting input of operational amplifier N1; One end of resistance R 8 is connected with the inverting input of operational amplifier N1, and resistance R 8 other ends are connected by electric connector with car body; One end of resistance R 9 is connected with power supply, and resistance R 9 other ends are connected with the positive terminal of light emitting diode V1; One end of resistance R 10 is connected with power supply Vcc1, and resistance R 10 other ends are connected with the collector terminal of phototriode V2; The output terminal of operational amplifier N1 is connected with the negative pole end of light emitting diode V1; The positive terminal of reference source N2 is connected with measurement ground GND; The collector terminal of phototriode V2 is connected with Vout; The emitter terminal of phototriode V2 is connected with signal ground GND1.Above-mentioned components and parts are printed band by the printed board conduction and are connected.
During testing circuit work, power supply Vcc is added to the cathode terminal of reference source N2 through resistance R 1, reference source N2 output reference voltage after resistance R 3 and resistance R 4 voltage matches is Vc, and reference voltage V c is output operational amplifier N1 in-phase end reference voltage V p after resistance R 5 and resistance R 6 dividing potential drops.Reference voltage V c output voltage after resistance R 0 and resistance R 2 dividing potential drops is car body voltage Vg, and car body voltage Vg is output operational amplifier N1 inverting input reference voltage V n after resistance R 7 and resistance R 8 dividing potential drops.When Vp<Vn, the operational amplifier output level is turned into low level, the output terminal of power supply Vcc and operational amplifier exists potential difference (PD) that thereby the light emitting diode V1 of current flowing resistance R9, photoelectrical coupler N3 is arranged, light emitting diode V1 this moment has electric current to flow through that thereby operate as normal is sent light signal and with the phototriode V2 conducting in the photoelectrical coupler N3, Vout and the GND1 output low level of joining.The Vout signal is defeated by peripheral control unit by the IO oral instructions, and peripheral control unit detects to be lighted pile behind the low level signal and accomplished fluently pilot lamp.As Vp〉during Vn, the operational amplifier output level is turned into high level, and this moment, the light emitting diode V1 no current of photoelectrical coupler N3 flow through, the not conducting of phototriode V2 in the photoelectrical coupler N3, power supply Vcc is through R10 and the Vout output high level that joins.The Vout signal is defeated by peripheral control unit by the IO oral instructions, and peripheral control unit sends audible and visual alarm and cuts off the alternating current input automatically after detecting high level signal, thus protection operating personnel's personal safety.
When vehicle connects AC power, as do not beat pile or when detecting car body ground and measuring loop resitance R0 between the ground greater than setting, system sends audible and visual alarm automatically, alternating current can't connecting system simultaneously.After accomplishing fluently pile and confirming that ground connection is good, system just automatically terminates audible and visual alarm and alternating current is inserted.

Claims (1)

1. a pile and electric-leakage detection circuit is characterized in that comprising: operational amplifier N1, resistance R 0, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, reference source N2, photoelectrical coupler N3; Wherein, photoelectrical coupler N3 comprises: light emitting diode V1 and phototriode V2;
Resistance R 0 one ends are connected with the car body electric connector, and resistance R 0 other end is connected with measurement ground GND; Resistance R 1 one ends are connected with power supply Vcc, and resistance R 1 other end is connected with the cathode terminal of reference source N2; Resistance R 2 one ends are connected with the car body electric connector, and resistance R 2 other ends are connected with the cathode terminal of reference source N2; The two ends of resistance R 3 are connected with reference edge with the cathode terminal of reference source N2 respectively; The two ends of resistance R 4 are connected with reference edge with the positive terminal of reference source N2 respectively; One end of resistance R 5 is connected with the cathode terminal of reference source N2, and resistance R 5 other ends are connected with the normal phase input end of operational amplifier N1; One end of resistance R 6 is connected with the positive terminal of reference source N2, and resistance R 6 other ends are connected with the normal phase input end of operational amplifier N1; One end of resistance R 7 is connected with the positive terminal of reference source N2, and resistance R 7 other ends are connected with the inverting input of operational amplifier N1; One end of resistance R 8 is connected with the inverting input of operational amplifier N1, and resistance R 8 other ends are connected with the car body electric connector; One end of resistance R 9 is connected with power supply, and resistance R 9 other ends are connected with the positive terminal of light emitting diode V1; One end of resistance R 10 is connected with power supply Vcc1, and resistance R 10 other ends are connected with the collector terminal of phototriode V2; The output terminal of operational amplifier N1 is connected with the negative pole end of light emitting diode V1; The positive terminal of reference source N2 is connected with measurement ground GND; The collector terminal of phototriode V2 is connected with Vout; The emitter terminal of phototriode V2 is connected with signal ground GND1; Above-mentioned components and parts are printed band by the printed board conduction and are connected;
During testing circuit work, power supply Vcc is added to the cathode terminal of reference source N2 through resistance R 1, reference source N2 output reference voltage after resistance R 3 and resistance R 4 voltage matches is Vc, and reference voltage V c is output operational amplifier N1 in-phase end reference voltage V p after resistance R 5 and resistance R 6 dividing potential drops; Reference voltage V c output voltage after resistance R 0 and resistance R 2 dividing potential drops is car body voltage Vg, and car body voltage Vg is output operational amplifier N1 inverting input reference voltage V n after resistance R 7 and resistance R 8 dividing potential drops; When Vp<Vn, the operational amplifier output level is turned into low level, the output terminal of power supply Vcc and operational amplifier exists potential difference (PD) that thereby the light emitting diode V1 of current flowing resistance R9, photoelectrical coupler N3 is arranged, light emitting diode V1 this moment has electric current to flow through that thereby operate as normal is sent light signal and with the phototriode V2 conducting in the photoelectrical coupler N3, Vout and the GND1 output low level of joining; The Vout signal is defeated by peripheral control unit by the IO oral instructions, and peripheral control unit detects to be lighted pile behind the low level signal and accomplished fluently pilot lamp; As Vp〉during Vn, the operational amplifier output level is turned into high level, and this moment, the light emitting diode V1 no current of photoelectrical coupler N3 flow through, the not conducting of phototriode V2 in the photoelectrical coupler N3, power supply Vcc is through R10 and the Vout output high level that joins; The Vout signal is defeated by peripheral control unit by the IO oral instructions, and peripheral control unit sends audible and visual alarm and cuts off the alternating current input automatically after detecting high level signal, thus protection operating personnel's personal safety.
CN 201320167784 2013-04-07 2013-04-07 A pile and electric leakage detecting circuit Active CN203164351U (en)

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Application Number Priority Date Filing Date Title
CN 201320167784 CN203164351U (en) 2013-04-07 2013-04-07 A pile and electric leakage detecting circuit

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Application Number Priority Date Filing Date Title
CN 201320167784 CN203164351U (en) 2013-04-07 2013-04-07 A pile and electric leakage detecting circuit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764972A (en) * 2015-03-23 2015-07-08 国网浙江海盐县供电公司 Substation ground wire connection indication device
CN110036303A (en) * 2016-11-29 2019-07-19 松下知识产权经营株式会社 Earth detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764972A (en) * 2015-03-23 2015-07-08 国网浙江海盐县供电公司 Substation ground wire connection indication device
CN110036303A (en) * 2016-11-29 2019-07-19 松下知识产权经营株式会社 Earth detector
CN110036303B (en) * 2016-11-29 2021-07-02 松下知识产权经营株式会社 Electric leakage detection device

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