CN200965562Y - A non-contact type electric line fault detection device - Google Patents
A non-contact type electric line fault detection device Download PDFInfo
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- CN200965562Y CN200965562Y CN 200620139014 CN200620139014U CN200965562Y CN 200965562 Y CN200965562 Y CN 200965562Y CN 200620139014 CN200620139014 CN 200620139014 CN 200620139014 U CN200620139014 U CN 200620139014U CN 200965562 Y CN200965562 Y CN 200965562Y
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Abstract
The utility model relates to a checkout device for the line fault of the contactless appliance, comprising a signal generator and a signal receiver, the signal produced circuit in the signal generator produces an alternating detecting signal, and the signal output circuit makes the alternating detecting signal output to the testing circuit, the signal receiver collects the electromagnetic field signal around the testing circuit and changing with the alternating detection signal mainly through the signal receiving circuit, and then the signal output circuit is monitored by the signal receiving circuit and output through the change of the strength of the sound, thereby detecting whether the circuit is normal or not. The utility model has the advantages of small in size, easy to be carried, in general status , the position of the malfunction can be checked without undoing the wiring harness and opening the sylphon bellows, even unloading the internal trimming, even if in the condition of lacking of the drawing of the cars and appliance, the trending of the wiring harness can also be tracked including a plurality of hidden circuitries in the internal trimming, thus breaking away from the cockamamie operation to turn over the drawing, find information, backout and load the circuit and components in the traditional way.
Description
Technical field
The utility model relates to a kind of pick-up unit, particularly a kind of non-contact type electrical apparatus line fault testing device.
Background technology
At present, along with improvement and the increase of vehicle on various performances, functions such as speed, safe, comfortable and outward appearance, make that relevant electric component increases on the vehicle, circuit is increasingly sophisticated, and wire harness quantity and length progressively increase.Technical requirement for inspection that has electric appliance circuits on the vehicle now and maintenance is higher, more professional, becomes a professional very strong technical work.
Traditional method for maintaining normally turns over drawing, look into technical information, dismounting circuit and parts, open the wire harness oversheath, segmentation adopts electrician's multimeter to repeat to measure, search, in case behind the vehicle electric element line failure, adopt existing traditional method for maintaining, the light detection is searched the guilty culprit part and will be spent plenty of time and energy, it is time-consuming effort again, and the maloperation owing to the maintenance personal damages original lead possibly in the line sectionalizing checking process, form new potential faults, under the increasingly sophisticated situation of existing electric appliance circuits, traditional method for maintaining is to the dismounting of line fault, maintenance is difficulty more.
The utility model content
In order to overcome problems of the prior art and deficiency, the utility model provides a kind of non-contact type electrical apparatus line fault testing device.Comprise signal generator and signal receiver, signal generator and circuit to be detected are electrically connected, detection signal is outputed in the circuit to be detected, generate an electromagnetic field around making circuit to be detected, with signal receiver along moving near the circuit to be detected, pick up the electromagnetic field signal that sends from circuit to be detected, signal is monitored and is adopted the form output of sound, in case occur short circuit on the circuit to be detected or open circuit, fluctuation will appear in the electromagnetic field signal at this place to be changed, the signal that signal receiver can monitor this place changes, and utilizes the size variation of sound to make prompting.Short circuit and the open circuit fault of searching electric appliance circuits are quick and convenient, have saved the troublesome operation of existing traditional maintenance method, need not to turn over drawing, consult reference materials dismounting circuit and parts.Time saving and energy saving.
The main technical schemes that the utility model adopted is: a kind of non-contact type electrical apparatus line fault testing device, comprise a signal generator, one signal receiver, the internal circuit of described signal generator comprises power circuit, signal generating circuit, signal amplification circuit and signal output apparatus, described signal output apparatus and described circuit to be detected are electrically connected, the alternating-current detection signal that described signal generating circuit is produced inputs in the circuit to be detected, makes circuit to be detected produce the electromagnetic field that changes with alternating-current detection signal on every side; The internal circuit of described signal receiver comprises power circuit, signal receiving circuit, signal processing circuit and signal deteching circuit, described signal receiver is near circuit to be detected, around circuit to be detected, move, pick up circuit to be detected electromagnetic field signal on every side by described signal receiving circuit, and the signal that receives is delivered to described signal processing circuit handle, export described signal deteching circuit afterwards to, signal is monitored by described signal deteching circuit;
The utility model also adopts following attached technical scheme: described signal generating circuit is a multi-harmonic self-excited oscillation circuit, comprise second resistance, the 3rd resistance, the 4th resistance, variable potentiometer, second electric capacity, the 3rd electric capacity, first triode, second triode, described second resistance, one end and second electric capacity, one end are connected the collector of described first triode jointly, described the 4th resistance one end and the 3rd electric capacity one end are connected the base stage of described first triode jointly, the emitter of described first triode is connected with the negative pole of described power supply, the other end of described the 3rd resistance one end and second electric capacity is connected the base stage of described second triode jointly, one end of described variable potentiometer is connected with the collector of described second triode, the emitter of described second triode is connected with the negative pole of described power supply, the other end of described second resistance, the other end of the other end of the 3rd resistance and the 4th resistance is connected with the positive pole of described power supply, the described first transistor collector output signal is through second capacitive feedback to the second transistor base, the described second transistor collector output signal is through the 3rd capacitive feedback to the first transistor base, described second resistance, the 4th is the biasing resistor of described first triode, the 3rd resistance, variable potentiometer is the biasing resistor of second triode, and the collector of described second triode exports the alternating-current detection signal that produces to described signal amplification circuit or directly exports in the described signal output apparatus;
Described signal amplification circuit comprises the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 4th electric capacity, the 5th electric capacity, light emitting diode, the 3rd triode, described the 4th electric capacity one end, the 5th electric capacity one end and the 7th resistance one end are connected the base stage of described the 3rd triode jointly, the other end of described the 5th resistance one end and the 5th electric capacity is connected the emitter of described the 3rd triode jointly, one end of described the 8th resistance is connected the collector of described the 3rd triode, one end of described light emitting diode is connected with the other end of described the 4th electric capacity, described light emitting diode and described the 6th resistance polyphone, the other end of described the 6th resistance, the other end of the other end of the 7th resistance and the 8th resistance is connected with the negative pole of described power supply, the other end of described the 5th resistance is connected with the positive pole of described power supply, described the 3rd triode amplifies the alternating-current detection signal of described signal generating circuit output, and the alternating-current detection signal after the processing and amplifying is inputed in the described signal output apparatus;
Described signal output apparatus includes switch, inductance, signal output part, signal output part and signal output part, one end of described switch and described signal output part and positive source are mutually and connect, the other end and described signal output part, the other end phase of variable potentiometer also connects, one end of one end of described inductance and the collector of described the 3rd triode and described the 8th resistance mutually and connect, the other end is connected with described signal output part, when described switch disconnects, described signal output part and signal output part and circuit to be detected are electrically connected, during described switch closure, described signal output part and circuit to be detected are electrically connected, and alternating-current detection signal is inputed to circuit to be detected;
Described power circuit comprises power supply, first filter capacitor, first resistance, first light emitting diode, described first resistance and first light emitting diode polyphone, and in parallel with described first filter capacitor, the two ends of an end of described first resistance, an end of first light emitting diode and first filter capacitor are connected with positive pole, the negative pole of described power supply respectively;
Described signal receiving circuit is the LC tuned circuit, comprise first inductance, first electric capacity, described signal processing circuit is the high frequency amplification demodulatoring circuit, comprise integrated circuit YS764, second resistance, the 3rd electric capacity, described signal deteching circuit is a low-frequency amplifier circuit, comprise first triode, second triode, earphone, described LC tuned circuit picks up the signal around the circuit to be detected and inputs to described integrated circuit YS764, signal is carried out the high frequency amplification to described integrated circuit YS764 and detection is handled, and the low frequency signal after will handling exports described low-frequency amplifier circuit to, and output audio signal detects the variation of circuit peripheral electromagnetic field signal to be detected in real time to the earphone sounding after described first triode and second triode amplify;
Described second source circuit comprises second source, the 6th current-limiting resistance, the 6th filtering capacitance of voltage regulation, described first inductance and described first electric capacity compose in parallel the LC tuned circuit, and be connected with input end 2 pin of described integrated circuit YS764, described second resistance and the 3rd capacitances in series are formed the biasing circuit of described integrated circuit YS764 output terminal 3 pin, described low-frequency amplifier circuit also comprises the 3rd resistance, the 4th resistance, the 5th resistance, the 4th electric capacity, the 5th electric capacity, adjustable potentiometer, described the 4th resistance one end connects first transistor emitter, the other end connects described second source negative pole, the 5th resistance one end connects positive source, the other end connects first transistor collector, described the 3rd resistance, the 4th resistance, the 5th resistance is formed the biasing circuit of described first triode amplifier, described the 3rd resistance has the voltage negative retroactive effect simultaneously, described electric capacity is the feedback capacity of second triode amplifier, be attempted by between second transistor base and the collector, adjustable potentiometer one end is connected with described second transistor emitter, and the other end is connected with described second source negative pole; Low frequency signal after described first triode will amplify couples directly to low base stage of putting output stage second triode, signal after second triode will amplify from the collector output audio signal to the earphone sounding, adjustable potentiometer as the negative feedback resistor of second transistor emitter, is adjusted as the earpiece volume size on the one hand on the other hand.
When described switch closure, described signal output part and circuit to be detected are electrically connected, the detection signal that described multi-harmonic self-excited oscillation circuit produces, collector through described second triode exports in the described signal amplification circuit, by the 3rd triode in the described signal amplification circuit signal is amplified, and the signal after will amplifying exports signal output part c in the described signal output apparatus to by the collector of the 3rd triode, by described signal output part c signal exported in the circuit to be detected.
When described switch disconnects, the alternating-current detection signal that described multi-harmonic self-excited oscillation circuit produces, directly export signal output part b in the described signal output apparatus by the collector of described second triode to through variable potentiometer, the positive pole of described signal output part a and described power supply joins, described signal output part a and circuit to be detected are electrically connected, signal output part b ground connection, this moment, circuit to be detected became a part of closed circuit of signal generator internal circuit, the alternating-current detection signal circuit to be detected of flowing through, and generate an electromagnetic field around making it.
When described switch disconnects, the alternating-current detection signal that described multi-harmonic self-excited oscillation circuit produces, directly export signal output part b in the described signal output apparatus to through the collector of described second triode, the positive pole of described signal output part a and described first power supply joins, described signal output part b and circuit to be detected are electrically connected, signal output part a ground connection, this moment, circuit to be detected became a part of closed circuit of signal generator internal circuit, the alternating-current detection signal circuit to be detected of flowing through, and generate an electromagnetic field around making it.
Adopt the beneficial effect that the utility model brought: (1) the utility model adopts signal generator and signal receiver to detect electrical apparatus line fault, signal generator is connected the alternating-current detection signal that will produce and inputs in the circuit to be detected with line electricity to be detected, make the signal that generates an electromagnetic field around the circuit, move around the circuit to be detected by signal receiver and to pick up this signal, and this signal handled and detect, in case circuit short circuit occurs or opens circuit, signal will change, and signal receiver gets final product to change by the intensity of sound size and reflects.Detect very efficient and conveniently, saved in the existing method for maintaining and turned over drawing, the loaded down with trivial details work of dismounting circuit, parts, time saving and energy saving.(2) signal generator of the present utility model and signal receiver volume are little, easy to carry, generally speaking, need not untie wire harness, corrugated tube need not be opened and even just the abort situation place can be do not found with dismounting interior trim spare, even under the situation that lacks the vehicle electric element drawing, comprise hidden wiring for some interior trim spare inside, also can carry out the tracking of wire harness trend.
Description of drawings
Fig. 1 is the structural representation of the utility model signal generator and signal receiver;
Fig. 2 is the circuit theory diagrams of the utility model signal generator;
Fig. 3 is the circuit theory diagrams of the utility model signal receiver.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description:
As Fig. 1, Fig. 2, shown in Figure 3,
Element sequence number and title among Fig. 2: first resistance R 1,5K; Second resistance R 2,5K; The 3rd resistance R 3,20K; The 4th resistance R 4,20K; The 5th resistance R 5,100K; The 6th R6,2K; The 7th resistance R 7,5K; The 8th resistance R 8,2K; Variable potentiometer W1,10K; The first light emitting diode V1, the second light emitting diode V2; The first filter capacitor C1,0.01uf; Second capacitor C 2,10n; The 3rd capacitor C 3,10n; The 4th capacitor C 4,15p; The 5th capacitor C 5,10uf; Inductance L; K switch; The first triode BG1,9014; The second triode BG2,9014; The 3rd triode BG3, A733; GZ, Φ 3.5mm external electric supply socket;
Element sequence number and title among Fig. 3: first resistance R 1,100K; Second resistance R 2,1.5K; The 3rd resistance R 3,27K; The 4th R4,100; The 5th resistance R 5,1.5K; Adjustable potentiometer W1,270; First capacitor C 1,7/140p; Second capacitor C 2,0.01; The 3rd capacitor C 3,0.1u; The 4th capacitor C 4,0.22u; The 5th capacitor C 5,5000p; The 6th filtering capacitance of voltage regulation C6,100uf; The first triode BG1,9014; The second triode BG2,9013; The YS764 integrated circuit; GZ, Φ 3.5mm socket (subsidiary earphone); Power supply 1.5V;
A kind of non-contact type electrical apparatus line fault testing device that provides for the utility model, comprise a signal generator, one signal receiver, the internal circuit of signal generator comprises power circuit 1, signal generating circuit 2, signal amplification circuit 3 and signal output apparatus 4, signal output apparatus 4 is electrically connected with circuit to be detected, the alternating-current detection signal that signal generating circuit 2 is produced inputs in the circuit to be detected, makes circuit to be detected produce the electromagnetic field that changes with alternating-current detection signal on every side; The internal circuit of signal receiver comprises power circuit, signal receiving circuit 2, signal processing circuit 3 and signal deteching circuit 4, signal receiver is near circuit to be detected, around circuit to be detected, move, pick up circuit to be detected electromagnetic field signal on every side by signal receiving circuit 2, and the signal that receives is delivered to signal processing circuit 3 handle, export signal deteching circuit 4 afterwards to, monitor by 4 pairs of signals of signal deteching circuit.
As shown in Figure 2, be the circuit diagram of signal generator.Wherein power circuit comprises a power supply, power supply adopts the power supply of 9V packed cell, anode connects external electric supply socket, the first filter capacitor C1, first resistance R, 1, the first light emitting diode V1, first resistance R 1 and first light emitting diode V1 polyphone, be connected to both ends of power and indicate as power supply, and in parallel with the first filter capacitor C1, and capacitor C 1 is connected in parallel on the effect that filtering is played at the positive and negative two ends of power supply.
Signal generating circuit is a multi-harmonic self-excited oscillation circuit, comprises second resistance R, 2, the three resistance R, 3, the four resistance R 4, variable potentiometer W1, second capacitor C, 2, the three capacitor C, 3, the first triode BG1, the second triode BG2.Second resistance R, 2 one ends and second capacitor C, 2 one ends are connected the collector of the first triode BG1 jointly, the 4th resistance R 4 one ends and the 3rd capacitor C 3 one ends are connected the base stage of the first triode BG1 jointly, the transmitter of the first triode BG1 is connected with the negative pole of power supply, the other end of the 3rd resistance R 3 one ends and second capacitor C 2 is connected the base stage of the second triode BG2 jointly, the end of variable potentiometer W1 is connected with the collector of the second triode BG2, the emitter of the second triode BG2 is connected with the negative pole of power supply, the other end of second resistance R 2, the other end of the other end of the 3rd resistance R 3 and the 4th resistance R 4 is connected with the positive pole of power supply.The first triode BG1 collector output signal feeds back to the second triode BG2 base stage through second capacitor C 2, the second triode BG2 collector output signal feeds back to the first triode BG1 base stage through the 3rd capacitor C 3, second resistance R 2, the 4th R4 are the biasing resistor of the first triode BG1, the 3rd resistance R 3, variable potentiometer W1 are the biasing resistor of the second triode BG2, and the collector of the second triode BG2 exports the alternating-current detection signal that produces signal amplification circuit to or directly exports signal output apparatus to.
Signal amplification circuit comprises the 5th resistance R 5, the six resistance R 6, the seven resistance R 7, the eight resistance R 8, the four capacitor C 4, the five capacitor C 5, light emitting diode V2, the 3rd triode BG3.The 4th capacitor C 4 one ends, the 5th capacitor C 5 one ends and the 7th resistance R 7 one ends are connected the base stage of the 3rd triode BG3 jointly, the other end of the 5th resistance R 5 one ends and the 5th capacitor C 5 is connected the emitter of the 3rd triode BG3 jointly, one end of the 8th resistance R 8 is connected the collector of the 3rd triode BG3, the end of light emitting diode V2 is connected with the other end of the 4th capacitor C 4, light emitting diode V2 and the 6th resistance R 6 polyphones, the other end of the 6th resistance R 6, the other end of the other end of the 7th resistance R 7 and the 8th resistance R 8 is connected with the negative pole of power supply, the other end of the 5th resistance R 5 is connected with the positive pole of power supply, the 3rd triode BG3 amplifies the alternating-current detection signal of signal generating circuit output, and the alternating-current detection signal after the processing and amplifying is inputed in the signal output apparatus.
Signal output apparatus includes K switch, inductance L, signal output part a, signal output part b and signal output part c, one end of K switch and signal output part a and positive source are mutually and connect, the other end and signal output part a, the other end phase of variable potentiometer W1 also connects, one end of one end of inductance L and the collector of the 3rd triode BG3 and the 8th resistance R 8 mutually and connect, the other end is connected with signal output part c, when K switch disconnected, signal output part a and signal output part b and circuit to be detected were electrically connected, when K switch is closed, signal output part c and circuit to be detected are electrically connected, and alternating-current detection signal is inputed in the circuit to be detected.
As shown in Figure 3, circuit diagram for signal receiver, wherein signal receiving circuit is the LC tuned circuit, comprise first inductance L 1, first capacitor C 1, signal processing circuit is the high frequency amplification demodulatoring circuit, comprise integrated circuit YS764, second resistance R 2, the 3rd capacitor C 3, signal deteching circuit is a low-frequency amplifier circuit, comprise the first triode BG1, the second triode GB2, earphone GZ, LC tuned circuit pick up the signal around the circuit to be detected and input to integrated circuit YS764, signal is carried out the high frequency amplification to integrated circuit YS764 and detection is handled, and the low frequency signal after will handling exports low-frequency amplifier circuit to, and output audio signal detects the variation of circuit peripheral electromagnetic field signal to be detected in real time to earphone GZ sounding after the first triode BG1 and the second triode BG2 amplify.Power circuit comprises power supply, the 6th current-limiting resistance R6, the 6th filtering capacitance of voltage regulation C6, first inductance L 1 and first capacitor C 1 compose in parallel the LC tuned circuit, select suitable reception wave frequency (535Khz-1605Khz) by adjusting C1 electric capacity size, and be connected with input end 2 pin of integrated circuit YS764, second resistance R 2 and the 3rd capacitor C 3 are composed in series the biasing circuit of integrated circuit YS764 output terminal 3 pin, low-frequency amplifier circuit also comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 4th capacitor C 4, the 5th capacitor C 5, adjustable potentiometer W1, the 4th resistance R 4 one ends connect the first triode BG1 emitter, the other end connects the second source negative pole, the 5th resistance R 5 one ends connect positive source, the other end connects the first triode BG1 collector, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 is formed the biasing circuit of the first triode BG1 amplifier, the 3rd resistance R 3 has the voltage negative retroactive effect simultaneously, capacitor C 5 is the feedback capacity of the second triode BG2 amplifier, be attempted by between the second triode BG2 base stage and the collector, adjustable potentiometer W1 one end is connected with the second triode BG2 emitter, and the other end is connected with the second source negative pole; Low frequency signal after the first triode BG1 will amplify couples directly to low base stage of putting the output stage second triode BG2, signal after the second triode BG2 will amplify from the collector output audio signal to earphone GZ sounding, adjustable potentiometer W1 as the negative feedback resistor of the second triode BG2 emitter, adjusts as the earpiece volume size on the one hand on the other hand.
K switch is an output change-over switch, is used for short circuit and the switching of the detected state that opens circuit.When K switch is closed, what circuit was carried out is the detection of opening circuit, signal output part c and circuit to be detected are electrically connected, the detection signal that multi-harmonic self-excited oscillation circuit produces, collector through the second triode BG2 exports in the signal amplification circuit, by the 3rd triode BG3 in the signal amplification circuit signal is amplified, and the signal after will amplifying exports signal output part c in the signal output apparatus to by the collector of the 3rd triode BG3, by signal output part c signal is exported in the circuit to be detected, this moment, detected circuit became the emitting antenna of signal generator, can produce electromagnetic field around the detected circuit with the alternating-current detection signal variation of signal generator output, along detected circuit, with close this section lead signal on every side that picks up of signal receiver, conditioning signal receptacle frequency, make the sound in the earphone the loudest, signal receiver is moved along detected circuit, when certain section wireline inspection sound disappears or obviously reduces (intensity of wire break point signal can change), can find the wire break point; Use the similar detection method, can carry out the tracking of the actual trend of wire harness.
When K switch disconnected, what circuit was carried out was short-circuit detecting.If detected line resistance is big or loose contact, light emitting diode V2 does not work, and proves the external circuit fault, otherwise the on of the luminous indication external circuit of light emitting diode V2 can cooperate signal receiver to carry out the lead short-circuit detecting.The alternating-current detection signal that multi-harmonic self-excited oscillation circuit produces, directly export signal output part b in the signal output apparatus to through the collector of the second triode BG2, the positive pole of the signal output part a and first power supply joins, signal output part a, b (for example: car insurance sheet two ends) is connected on the detected circuit, this moment, detected circuit became a part of closed circuit of signal generator, can produce electromagnetic field around the detected circuit with the alternating-current detection signal variation of signal generator output, along detected circuit, with close this section lead signal on every side that picks up of receiver, regulate receiver frequency and volume potentiometer, make the sound in the earphone the loudest, receptacle is moved along detected circuit, when certain section wireline inspection sound disappears or obviously reduces (as vehicle common ground point vehicle body, because its surface area is bigger, high-frequency signal enters wherein and can obviously disperse and weaken), can find lead shorted to earth point; Use the similar detection method, can carry out the tracking of the actual trend of wire harness.When detecting, any end of signal output part a, b all can be connected with circuit to be detected, and an end is with after circuit to be detected is connected, and the other end is ground connection then, promptly is connected with vehicle body.
Above-mentioned signal generator and signal receiver are when detecting electrical apparatus line fault, signal generator is connected with line electricity to be detected alternating-current detection signal is inputed in the circuit to be detected, make the signal that generates an electromagnetic field around the circuit, move around the circuit to be detected by signal receiver and to pick up this signal, and this signal handled and detect, in case circuit short circuit occurs or opens circuit, signal will change, and signal receiver gets final product to change and reflects by sound.Detect very efficient and conveniently, saved in the existing method for maintaining and turned over drawing, the loaded down with trivial details work of dismounting circuit, parts, time saving and energy saving.Simultaneously, because the volume of signal generator and signal receiver is little, easy to carry, generally speaking, need not untie wire harness, need not open corrugated tube and even just can not find the abort situation place, even under the situation that lacks the vehicle electric element drawing with dismounting interior trim spare, comprise hidden wiring, also can carry out the tracking of wire harness trend for some interior trim spare inside.
Claims (10)
1, a kind of non-contact type electrical apparatus line fault testing device, comprise a signal generator, one signal receiver, it is characterized in that: the internal circuit of described signal generator comprises power circuit (1), signal generating circuit (2), signal amplification circuit (3) and signal output apparatus (4), described signal output apparatus (4) is electrically connected with described circuit to be detected, the alternating-current detection signal that described signal generating circuit (2) is produced inputs in the circuit to be detected, makes circuit to be detected produce the electromagnetic field that changes with alternating-current detection signal on every side; The internal circuit of described signal receiver comprises power circuit (1), signal receiving circuit (2), signal processing circuit (3) and signal deteching circuit (4), described signal receiver is near circuit to be detected, around circuit to be detected, move, pick up circuit to be detected electromagnetic field signal on every side by described signal receiving circuit (2), and the signal that receives is delivered to described signal processing circuit (3) handle, export described signal deteching circuit (4) afterwards to, signal is monitored by described signal deteching circuit (4).
2, pick-up unit according to claim 1, it is characterized in that: described signal generating circuit is a multi-harmonic self-excited oscillation circuit, comprise second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), variable potentiometer (W1), second electric capacity (C2), the 3rd electric capacity (C3), first triode (BG1), second triode (BG2), described second resistance (R2) end and second electric capacity (C2) end are connected the collector of described first triode (BG1) jointly, described the 4th resistance (R4) end and the 3rd electric capacity (C3) end are connected the base stage of described first triode (BG1) jointly, the transmitter of described first triode (BG1) is connected with the negative pole of described power supply, the other end of described the 3rd resistance (R3) end and second electric capacity (C2) is connected the base stage of described second triode (BG2) jointly, one end of described variable potentiometer (W1) is connected with the collector of described second triode (BG2), the emitter of described second triode (BG2) is connected with the negative pole of described power supply, the other end of described second resistance (R2), the other end of the other end of the 3rd resistance (R3) and the 4th resistance (R4) is connected with the positive pole of described power supply, described first triode (BG1) collector output signal feeds back to second triode (BG2) base stage through second electric capacity (C2), described second triode (BG2) collector output signal feeds back to first triode (BG1) base stage through the 3rd electric capacity (C3), described second resistance (R2), the 4th (R4) is the biasing resistor of described first triode (BG1), the 3rd resistance (R3), variable potentiometer (W1) is the biasing resistor of second triode (BG2), and the collector of described second triode (BG2) exports the alternating-current detection signal that produces described signal amplification circuit to or directly exports described signal output apparatus to.
3, pick-up unit according to claim 2, it is characterized in that: described signal amplification circuit comprises the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), the 4th electric capacity (C4), the 5th electric capacity (C5), light emitting diode (V2), the 3rd triode (BG3), described the 4th electric capacity (C4) end, the 5th electric capacity (C5) end and the 7th resistance (R7) end are connected the base stage of described the 3rd triode (BG3) jointly, the other end of described the 5th resistance (R5) end and the 5th electric capacity (C5) is connected the emitter of described the 3rd triode (BG3) jointly, one end of described the 8th resistance (R8) is connected the collector of described the 3rd triode (BG3), one end of described light emitting diode (V2) is connected with the other end of described the 4th electric capacity (C4), described light emitting diode (V2) and described the 6th resistance (R6) polyphone, the other end of described the 6th resistance (R6), the other end of the other end of the 7th resistance (R7) and the 8th resistance (R8) is connected with the negative pole of described power supply, the other end of described the 5th resistance (R5) is connected with the positive pole of described power supply, described the 3rd triode (BG3) amplifies the alternating-current detection signal of described signal generating circuit output, and the alternating-current detection signal after the processing and amplifying is inputed in the described signal output apparatus.
4, pick-up unit according to claim 3, it is characterized in that: described signal output apparatus includes switch (K), inductance (L), signal output part (a), signal output part (b) and signal output part (c), one end of described switch (K) and described signal output part (a) and positive source are mutually and connect, the other end and described signal output part (a), the other end phase of variable potentiometer (W1) also connects, the collector of one end of described inductance (L) and described the 3rd triode (BG3) and an end of described the 8th resistance (R8) are mutually and connect, the other end is connected with described signal output part (c), when described switch (K) disconnects, described signal output part (a) and signal output part (b) are electrically connected with circuit to be detected, when described switch (K) is closed, described signal output part (c) is electrically connected with circuit to be detected, and alternating-current detection signal is inputed in the circuit to be detected.
5, according to claim 1 or 2 or 3 or 4 described pick-up units, it is characterized in that: described power circuit comprises power supply, first filter capacitor (C1), first resistance (R1), first light emitting diode (V1), described first resistance (R1) and first light emitting diode (V1) polyphone, and in parallel with described first filter capacitor (C1), an end of an end of described first resistance (R1), first light emitting diode (V1) is connected with positive pole, the negative pole of described power supply respectively with the two ends of first filter capacitor (C1).
6, pick-up unit according to claim 1, it is characterized in that: described signal receiving circuit is the LC tuned circuit, comprise first inductance (L1), first electric capacity (C1), described signal processing circuit is the high frequency amplification demodulatoring circuit, comprise integrated circuit YS764, second resistance (R2), the 3rd electric capacity (C3), described signal deteching circuit is a low-frequency amplifier circuit, comprise first triode (BG1), second triode (GB2), earphone (GZ), described LC tuned circuit picks up the signal around the circuit to be detected and inputs to described integrated circuit YS764, signal is carried out the high frequency amplification to described integrated circuit YS764 and detection is handled, and the low frequency signal after will handling exports described low-frequency amplifier circuit to, output audio signal detects the variation of circuit peripheral electromagnetic field signal to be detected in real time to earphone (GZ) sounding after described first triode (BG1) and second triode (BG2) amplification.
7, pick-up unit according to claim 6, it is characterized in that: described second source circuit comprises second source, the 6th current-limiting resistance (R6), the 6th filtering capacitance of voltage regulation (C6), described first inductance (L1) composes in parallel the LC tuned circuit with described first electric capacity (C1), and be connected with input end 2 pin of described integrated circuit YS764, described second resistance (R2) and the 3rd electric capacity (C3) are composed in series the biasing circuit of described integrated circuit YS764 output terminal 3 pin, described low-frequency amplifier circuit also comprises the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 4th electric capacity (C4), the 5th electric capacity (C5), adjustable potentiometer (W1), described the 4th resistance (R4) end connects first triode (BG1) emitter, the other end connects described second source negative pole, the 5th resistance (R5) end connects positive source, the other end connects first triode (BG1) collector, described the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5) is formed the biasing circuit of described first triode (BG1) amplifier, described the 3rd resistance (R3) has the voltage negative retroactive effect simultaneously, described electric capacity (C5) is the feedback capacity of second triode (BG2) amplifier, be attempted by between second triode (BG2) base stage and the collector, adjustable potentiometer (W1) end is connected with described second triode (BG2) emitter, and the other end is connected with described second source negative pole; Low frequency signal after described first triode (BG1) will amplify couples directly to low base stage of putting output stage second triode (BG2), signal after second triode (BG2) will amplify from the collector output audio signal to earphone (GZ) sounding, adjustable potentiometer (W1) as the negative feedback resistor of second triode (BG2) emitter, is adjusted as the earpiece volume size on the one hand on the other hand.
8, pick-up unit according to claim 5, it is characterized in that: when described switch (K) is closed, described signal output part (c) is electrically connected with circuit to be detected, the detection signal that described multi-harmonic self-excited oscillation circuit produces, collector through described second triode (BG2) exports in the described signal amplification circuit, by the 3rd triode (BG3) in the described signal amplification circuit signal is amplified, and the signal after will amplifying exports signal output part (c) in the described signal output apparatus to by the collector of the 3rd triode (BG3), and (c) exports signal in the circuit to be detected to by described signal output part.
9, pick-up unit according to claim 5, it is characterized in that: when described switch (K) disconnects, the alternating-current detection signal that described multi-harmonic self-excited oscillation circuit produces, directly export signal output part (b) in the described signal output apparatus by the collector of described second triode (BG2) to through variable potentiometer (W1), described signal output part (a) joins with the positive pole of described power supply, described signal output part (a) is electrically connected with circuit to be detected, signal output part (b) ground connection, this moment, circuit to be detected became a part of closed circuit of signal generator internal circuit, the alternating-current detection signal circuit to be detected of flowing through, and generate an electromagnetic field around making it.
10, pick-up unit according to claim 5, it is characterized in that: when described switch (K) disconnects, the alternating-current detection signal that described multi-harmonic self-excited oscillation circuit produces, directly export signal output part (b) in the described signal output apparatus to through the collector of described second triode (BG2), described signal output part (a) joins with the positive pole of described first power supply, described signal output part (b) is electrically connected with circuit to be detected, signal output part (a) ground connection, this moment, circuit to be detected became a part of closed circuit of signal generator internal circuit, the alternating-current detection signal circuit to be detected of flowing through, and generate an electromagnetic field around making it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620139014 CN200965562Y (en) | 2006-08-31 | 2006-08-31 | A non-contact type electric line fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620139014 CN200965562Y (en) | 2006-08-31 | 2006-08-31 | A non-contact type electric line fault detection device |
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| CN200965562Y true CN200965562Y (en) | 2007-10-24 |
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| CN 200620139014 Expired - Fee Related CN200965562Y (en) | 2006-08-31 | 2006-08-31 | A non-contact type electric line fault detection device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881799A (en) * | 2010-06-23 | 2010-11-10 | 河南送变电建设公司 | Grounding net distribution detector |
| CN101136661B (en) * | 2006-08-31 | 2012-11-21 | 中通客车控股股份有限公司 | Non-contact type electrical apparatus line fault testing device |
| CN103698656A (en) * | 2013-12-06 | 2014-04-02 | 国网山东夏津县供电公司 | Non-contact earth leakage fault detection method |
| CN103983887A (en) * | 2014-05-23 | 2014-08-13 | 工业和信息化部电子第五研究所 | Automatic locating method and device for open circuit of circuit |
| CN109557407A (en) * | 2018-12-21 | 2019-04-02 | 湖南金泰检测检验有限公司 | Earth conductor cable breakpoint of cable position detecting circuit and method |
| CN110031744A (en) * | 2017-12-12 | 2019-07-19 | 美光科技公司 | For testing the test probe device and related systems and methods of semiconductor bare chip |
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2006
- 2006-08-31 CN CN 200620139014 patent/CN200965562Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136661B (en) * | 2006-08-31 | 2012-11-21 | 中通客车控股股份有限公司 | Non-contact type electrical apparatus line fault testing device |
| CN101881799A (en) * | 2010-06-23 | 2010-11-10 | 河南送变电建设公司 | Grounding net distribution detector |
| CN101881799B (en) * | 2010-06-23 | 2012-09-05 | 河南送变电建设公司 | Grounding net distribution detector |
| CN103698656A (en) * | 2013-12-06 | 2014-04-02 | 国网山东夏津县供电公司 | Non-contact earth leakage fault detection method |
| CN103983887A (en) * | 2014-05-23 | 2014-08-13 | 工业和信息化部电子第五研究所 | Automatic locating method and device for open circuit of circuit |
| CN110031744A (en) * | 2017-12-12 | 2019-07-19 | 美光科技公司 | For testing the test probe device and related systems and methods of semiconductor bare chip |
| CN109557407A (en) * | 2018-12-21 | 2019-04-02 | 湖南金泰检测检验有限公司 | Earth conductor cable breakpoint of cable position detecting circuit and method |
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Granted publication date: 20071024 Termination date: 20110831 |