CN201212901Y - Short circuit detection device - Google Patents
Short circuit detection device Download PDFInfo
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- CN201212901Y CN201212901Y CNU2008200248717U CN200820024871U CN201212901Y CN 201212901 Y CN201212901 Y CN 201212901Y CN U2008200248717 U CNU2008200248717 U CN U2008200248717U CN 200820024871 U CN200820024871 U CN 200820024871U CN 201212901 Y CN201212901 Y CN 201212901Y
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Abstract
The utility model discloses a short-circuit detecting device which comprises an impulse current generator that generates impulse current when in short circuit of the line of equipment so that an impulse magnet field is generated around the line, and also comprises an impulse current detector, wherein the impulse current detector comprises a detecting element used for detecting the impulse magnet field and an indication element for indicating the direction of the impulse current. The short-circuit failure position can be quickly found by using the short-circuit detecting device, the detecting accuracy is higher, and the maintenance efficiency is improved.
Description
Technical field
The utility model relates to a kind of short-circuit detecting device, specifically, relates to a kind of device that detects the large-scale engineering machinery short circuit trouble point.
Background technology
Along with improving constantly of engineering machinery technology, the one-piece construction and the layout of engineering machinery become increasingly complex, and be also more and more higher to the reliability requirement of engineering machinery work.Guarantee the normal steady operation of engineering machinery, when engineering machinery breaks down, need to find out failure cause and abort situation rapidly, exactly, so that in time fault is got rid of.In ordinary maintenance and safeguarding, the maintenance of engineering machinery short trouble is one of difficult problem of maintenance personal always, special in large-scale engineering machinery, because its integral layout is very complicated, circuit is long and distribution is mixed and disorderly, and position of failure point is more hidden, and the time of searching the trouble spot needs is longer, but also be easy to generate erroneous judgement, have a strong impact on troubleshooting effort.
Summary of the invention
The utility model is searched the technical matters that difficulty is big, the time of searching is long, overhaul efficiency is low at the medium-and-large-sized engineering machinery short circuit trouble point of prior art, a kind of short-circuit detecting device is provided, utilize described short-circuit detecting device, can promptly find the short trouble position, and it is higher to detect accuracy rate, improves overhaul efficiency.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of short-circuit detecting device, thus comprise that produces pulse current produces pulsed magnetic field around circuit a impulse current generator when the device line short circuit; Also comprise a pulse current detecting device, described pulse current detecting device comprises the indicator elment that is used to detect the detecting element of described pulsed magnetic field and indicates described pulse current direction.
Further, described impulse current generator comprises power supply terminal, current output terminal and ground terminal; Described power supply terminal connects the positive pole of a charge and discharge capacitance on the one hand by current-limiting resistance, and the negative pole of described charge and discharge capacitance is connected with described ground terminal; On the other hand, connect the switch ways of a gate-controlled switch circuit, and then connect a current selecting circuit by described switch ways; The output of described current selecting circuit is connected with described current output terminal.
Again further, described gate-controlled switch circuit comprises relay, and the coils from parallel connection of coils of described relay is between described charge and discharge capacitance both positive and negative polarity, and the moving together contact of described relay is connected between current-limiting resistance and the current selecting circuit.
For ease of adjusting the frequency of pulse current, the coil of described relay and a potentiometer are formed series arm, and described series arm is connected in parallel between the described charge and discharge capacitance both positive and negative polarity.Described current selecting circuit comprises the electric current selection branch road that at least two route selector switch and resistance are formed.
Preferably, described current selecting circuit comprises the electric current selection branch road of two-way parallel connection.
As the further qualification to technique scheme, the output terminal of described detecting element is connected with dc amplification circuit, and the signal that detecting element is exported amplifies; The output terminal of described dc amplification circuit is connected with the adjustment circuit that the signal after amplifying is adjusted, and described adjustment circuit transfers to described indicator elment with adjusted signal, is used to indicate the direction of described pulse current.
Further, described detecting element is a Hall element, and described indicator elment is two light emitting diodes; The control electrode of described Hall element is connected on the power supply two ends, and the Hall electrode of described Hall element connects described dc amplification circuit; The output terminal of described dc amplification circuit is connected with the adjustment circuit of differentiating circuit and comparer composition, wherein, comprise an integrated transporting discharging in the described differentiating circuit, the inverting input of described integrated transporting discharging connects the inverting input of first comparer, the in-phase input end of integrated transporting discharging connects the in-phase input end of second comparer, and the output terminal of integrated transporting discharging connects the in-phase input end of first comparer on the one hand, connects the inverting input of second comparer on the other hand; The output terminal of described first comparer connects the positive pole of first light emitting diode, the minus earth of described first light emitting diode; The output terminal of described second comparer connects the positive pole of second light emitting diode, the minus earth of described second light emitting diode.Wherein, described power supply is the 9V battery.
Compared with prior art, advantage of the present utility model and good effect are:
When 1, using short-circuit detecting device described in the utility model to detect short trouble, the fixed pulse current feedback circuit, the pulse current detecting device is moved on road along the line, indication according to indicator elment in the pulse current detecting device, can find abort situation easily and quickly, easy to use, labour intensity is low, the efficient height, and avoided needing in the prior art to destroy the problem that circuit detects.
2, utilize the charge and discharge capacitance in the impulse current generator to produce pulse current, thereby around circuit, form pulsed magnetic field, can guarantee the accuracy of detection of pick-up unit, also avoided adopting energy consumption that steady current causes and the thermal effect influence of circuit.
3, the inner non-transformer of impulse current generator can directly insert power supply from circuit, and wiring is simple, and usable range is wide.
4, pulse current detector sensitivity height, the accuracy of detection height, and adopt low voltage power supply, power consumption is little, uses more convenient.
Description of drawings
Fig. 1 is the circuit theory diagrams of impulse current generator in the utility model short-circuit detecting device;
Fig. 2 is the circuit theory diagrams of pulse current detecting device in the utility model short-circuit detecting device.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Short-circuit detecting device described in the utility model comprises impulse current generator and pulse current detecting device two parts, and impulse current generator can produce pulse current, and then produces pulsed magnetic field around circuit; And the pulse current detecting device includes detecting element, can detect described pulsed magnetic field, and utilize indicator elment in the detected pulsed magnetic field signal controlling detecting device, the marker pulse sense of current, and the direction indication of pulse current the locality of line short trouble spot, the staff can dwindle the hunting zone of short circuit trouble point according to the indicated pulse current direction of detecting device, thereby promptly finds out position of failure point.Below in conjunction with circuit diagram this two-part principle of work is described in detail.
Figure 1 shows that the circuit theory diagrams of impulse current generator, described impulse current generator comprises three terminals, i.e. power supply terminal 1, current output terminal 2 and ground terminal 3.Power supply terminal 1 connects the positive pole of a charge and discharge capacitance C1 by current-limiting resistance R1, and the negative pole of C1 is connected with ground terminal 3.Capacitor C 1 is selected jumbo electric capacity for use, so that produce the bigger pulse current of amplitude.Current-limiting resistance R1 also is connected with the coil J of a relay by potentiometer Rp, adjusts potentiometer Rp, can adjust the frequency of pulse current.And the moving together contact K0 of relay is connected between current-limiting resistance R1 and current output terminal 2.Also be in series with current selecting circuit between K0 and current output terminal 2, described current selecting circuit comprises the electric current selection branch road of two-way parallel connection.Wherein, selector switch K1 has formed one road electric current with resistance R 2 and diode D1 and has selected branch road, and selector switch K2 has formed another road electric current with resistance R 3 and diode D2 and selected branch road.Between power supply terminal 1 and current-limiting resistance R1, also be in series with a commutation diode D3.
The course of work of above-mentioned impulse current generator is as follows: the positive pole of power supply terminal 1 external direct current power supply, give jumbo capacitor C 1 charging by current-limiting resistance R1 then.Because charging current limits by R1, so the current ratio in the circuit is less, the magnetic field that electric current produces on the line a little less than.When the voltage of capacitor C 1 rises to the voltage that electromagnetic relay can adhesive gradually, movingly close electric shock K0 closure, capacitor discharge, and,, thereby around circuit, form bigger pulsed magnetic field from the bigger electric current of current output terminal 2 outputs by current selecting circuit.Can come the size of gating pulse electric current by the combination of current selected switch K1 and K2.Along with the decline of voltage on the capacitor C 1, when the voltage of C1 dropped to the release voltage of relay, the moving electric shock K0 that closes disconnected, and power supply gives capacitor C 1 charging again.Repeat above-mentioned charge and discharge process, the generation pulse current that can circulate, thus form consecutive pulses magnetic field on the line.
Described impulse current generator adopts the large bulk capacitance discharge with the generation pulse current, thereby produces a pulsed magnetic field on the line.Why using pulse current and without steady current, is that magnetic field is strong more because electric current is big more, be detected easily, if but adopt bigger steady current, cause lot of energy consumption, and the thermal effect that big electric current produces can cause adverse effect to circuit and equipment.
Figure 2 shows that the circuit theory diagrams of pulse current detecting device.Described pulse current detecting device comprises a Hall element H as the detecting element that detects pulse current, and control electrode 1 pin of Hall element H links to each other with the 9V power supply with resistance R 4 by K switch s, and 3 pin of control electrode are by resistance R 5 ground connection.Hall electrode 2 pin of Hall element H are connected with the input end of resistance R 6 with dc amplification circuit amplifier A1 by resistance R 7 with 4 pin.The output terminal of dc amplification circuit amplifier A1 is connected with the differentiating circuit of being made up of integrated transporting discharging A2.The inverting input of described integrated transporting discharging A2 links to each other with the inverting input of the first comparer A3 by resistance R 10, the in-phase input end of integrated transporting discharging A2 links to each other with the in-phase input end of the second comparer A4 by resistance R 11, and the output terminal of integrated transporting discharging A2 connects the in-phase input end of the first comparer A3 and the inverting input of the second comparer A4 simultaneously.The output terminal of the first comparer A3 connects first LED 1 by resistance R 15, and the output terminal of the second comparer A4 connects second LED 2 by resistance R 14, and LED 1 and LED2 have constituted the indicator elment in the pulse current detecting device.
The principle of work of above-mentioned pulse current detecting device is as follows: Closing Switch Ks, the control electrode of Hall element H inserts in the DC power-supply circuit, adjust the resistance of divider resistance R4 and R5, make voltage that the Hall electrode of Hall element H exports near half of power supply voltage.When the magnetic line of force of pulsed magnetic field passed Hall element, the output voltage of the Hall electrode of Hall element changed, and produced a less voltage difference.After this voltage difference is amplified through above-mentioned dc amplification circuit amplifier A1, input to the adjustment circuit that the above-mentioned differentiating circuit and the first comparer A3 and the second comparer A4 constitute, thereby control LED 1 and LED2 are alternately luminous, form the intermittent flow that is similar to the running lamp shape.And the direction indication that flows produce described pulsed magnetic field pulse current actual direction, thereby according to the flow direction that LED1 and LED2 form because of sequence of light, judge the direction of pulse current in the impulse current generator.
Above-mentioned detecting element is not limited to Hall element, the electronic component that also can select for use hall integrated package, magnetic head etc. can pulse magnetic field to react.
The short-circuit detecting device that utilizes above-mentioned impulse current generator and pulse current detecting device to form, can work machine etc. the short trouble of circuit complex distribution equipment.Using method is: the power supply terminal 1 of impulse current generator is inserted the mains side of the fuse holder that fuses because of being short-circuited, and the load-side of the described fuse holder of current output terminal 2 accesses, ground terminal 3 is connected with the ground wire terminal of equipment.The definite selector switch K1 and the K2 that need press of pulse current as required if search the circuit that is short-circuited fast, needs bigger electric current, and will dwindle seek scope in order to the locking location of short circuit, then needs less current.Simultaneously, select suitable pulsed frequency by adjusting potentiometer Rp.After the impulse current generator adjustment finishes, use the pulse current detecting device to begin to detect.During detection, earlier the output line from impulse current generator detects, and the load-side from fuse holder that fusing takes place detects along wire harness then.K switch s near wire harness the time, is pressed in the detection position that is provided with Hall element, if LED 1 and LED2 form the intermittent flow that is similar to running lamp, then the direction of Liu Donging is exactly the actual direction of pulse current.Direction along the pulse current of diode displaying detects, and, then detects the direction of pulse current respectively in branch if run into the branch of wire harness.By adjusting selector switch K1 and K2, finally can find the location of fault that is short-circuited soon, fix a breakdown then.
The inner non-transformer of impulse current generator described in the utility model can directly insert from engineering mechanical device, and wiring is simple, and usable range is wide, and the equipment of 12V or 24V all can use.The sensitivity of pulse current detecting device is higher, in the scope of off-line bundle 15cm, all can detect accurately and the direction indication, and no matter the positive and negative placement of Hall element, correctly the actual direction of marker pulse electric current is easy to use, the accuracy in detection height.In addition, the pulse current detecting device adopts the 9V powered battery, and power consumption is few, and is simple in structure.Compare with the prior art that the engineering machinery short trouble is detected, short-circuit detecting device described in the utility model does not need open-circuit line promptly can observe the direction of pulse current intuitively, and find short circuit trouble point rapidly according to current direction, shortened the repair time, reduce the difficulty and the False Rate of fault judgement, improved overhaul efficiency.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (9)
1, a kind of short-circuit detecting device is characterized in that, thereby described short-circuit detecting device comprises that produces pulse current produces pulsed magnetic field around circuit a impulse current generator when the device line short circuit; Also comprise a pulse current detecting device, described pulse current detecting device comprises the indicator elment that is used to detect the detecting element of described pulsed magnetic field and indicates described pulse current direction.
2, short-circuit detecting device according to claim 1 is characterized in that, described impulse current generator comprises power supply terminal, current output terminal and ground terminal; Described power supply terminal connects the positive pole of a charge and discharge capacitance on the one hand by current-limiting resistance, and the negative pole of described charge and discharge capacitance is connected with described ground terminal; On the other hand, connect the switch ways of a gate-controlled switch circuit, and then connect a current selecting circuit by described switch ways; The output of described current selecting circuit is connected with described current output terminal.
3, short-circuit detecting device according to claim 2, it is characterized in that, described gate-controlled switch circuit comprises relay, and the coils from parallel connection of coils of described relay is between described charge and discharge capacitance both positive and negative polarity, and the moving together contact of described relay is connected between current-limiting resistance and the current selecting circuit.
4, short-circuit detecting device according to claim 3 is characterized in that, the coil of described relay and a potentiometer are formed series arm, and described series arm is connected in parallel between the described charge and discharge capacitance both positive and negative polarity.
5, short-circuit detecting device according to claim 3 is characterized in that, described current selecting circuit comprises the electric current selection branch road that at least two route selector switch and resistance are formed.
6, short-circuit detecting device according to claim 5 is characterized in that, described current selecting circuit comprises the electric current selection branch road of two-way parallel connection.
7, according to each described short-circuit detecting device in the claim 1 to 6, it is characterized in that the output terminal of described detecting element is connected with dc amplification circuit, the signal that detecting element is exported amplifies; The output terminal of described dc amplification circuit is connected with the adjustment circuit that the signal after amplifying is adjusted, and described adjustment circuit transfers to described indicator elment with adjusted signal, is used to indicate the direction of described pulse current.
8, short-circuit detecting device according to claim 7 is characterized in that, described detecting element is a Hall element, and described indicator elment is two light emitting diodes; The control electrode of described Hall element is connected on the power supply two ends, and the Hall electrode of described Hall element connects described dc amplification circuit; The output terminal of described dc amplification circuit is connected with the adjustment circuit of differentiating circuit and comparer composition, wherein, comprise an integrated transporting discharging in the described differentiating circuit, the inverting input of described integrated transporting discharging connects the inverting input of first comparer, the in-phase input end of integrated transporting discharging connects the in-phase input end of second comparer, and the output terminal of integrated transporting discharging connects the in-phase input end of first comparer on the one hand, connects the inverting input of second comparer on the other hand; The output terminal of described first comparer connects the positive pole of first light emitting diode, the minus earth of described first light emitting diode; The output terminal of described second comparer connects the positive pole of second light emitting diode, the minus earth of described second light emitting diode.
9, short-circuit detecting device according to claim 8 is characterized in that, described power supply is the 9V battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200248717U CN201212901Y (en) | 2008-07-01 | 2008-07-01 | Short circuit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200248717U CN201212901Y (en) | 2008-07-01 | 2008-07-01 | Short circuit detection device |
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| CN201212901Y true CN201212901Y (en) | 2009-03-25 |
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| CNU2008200248717U Expired - Fee Related CN201212901Y (en) | 2008-07-01 | 2008-07-01 | Short circuit detection device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487704A (en) * | 2013-10-12 | 2014-01-01 | 广西柳工机械股份有限公司 | Switch with line fault diagnostic function |
| CN103529346A (en) * | 2013-10-12 | 2014-01-22 | 广西柳工机械股份有限公司 | Line fault diagnosis method and device |
| CN103823462A (en) * | 2014-03-06 | 2014-05-28 | 深圳市赛灵卓科技有限公司 | Engineering machinery use controller with fault diagnosis function and engineering machinery control method |
| CN103983882A (en) * | 2013-02-08 | 2014-08-13 | 施耐德电器工业公司 | Device and method for detecting connectivity of digital input signal line |
| CN105699845A (en) * | 2016-02-26 | 2016-06-22 | 方刚 | Power cable line-to-ground/electricity series fault point searching instrument of electrical device |
| CN106970292A (en) * | 2017-04-27 | 2017-07-21 | 苏州博众精工科技有限公司 | A kind of battery pole piece cuts short-circuit alarming circuit |
| CN108919131A (en) * | 2018-06-29 | 2018-11-30 | 湖南科霸汽车动力电池有限责任公司 | The detection determination method of battery micro-short circuit |
| CN109962446A (en) * | 2019-04-28 | 2019-07-02 | 西南科技大学城市学院 | Safety utilization of electric power intelligent protection device |
| CN111474461A (en) * | 2020-03-31 | 2020-07-31 | 南京优倍电气有限公司 | Circuit device for detecting failure of switch of functional safety product |
| CN111502799A (en) * | 2017-09-07 | 2020-08-07 | 天津大创科技有限公司 | Pipeline disconnection detection method |
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2008
- 2008-07-01 CN CNU2008200248717U patent/CN201212901Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103983882B (en) * | 2013-02-08 | 2016-12-28 | 施耐德电器工业公司 | The device and method of detection digital input signals wire connectivity |
| CN103983882A (en) * | 2013-02-08 | 2014-08-13 | 施耐德电器工业公司 | Device and method for detecting connectivity of digital input signal line |
| CN103529346A (en) * | 2013-10-12 | 2014-01-22 | 广西柳工机械股份有限公司 | Line fault diagnosis method and device |
| CN103487704A (en) * | 2013-10-12 | 2014-01-01 | 广西柳工机械股份有限公司 | Switch with line fault diagnostic function |
| CN103529346B (en) * | 2013-10-12 | 2016-12-07 | 广西柳工机械股份有限公司 | Circuit fault diagnosis method and device |
| CN103823462A (en) * | 2014-03-06 | 2014-05-28 | 深圳市赛灵卓科技有限公司 | Engineering machinery use controller with fault diagnosis function and engineering machinery control method |
| CN105699845B (en) * | 2016-02-26 | 2018-09-14 | 方刚 | Electrical equipment power cable line is grounded/goes here and there electric fault point and finds instrument |
| CN105699845A (en) * | 2016-02-26 | 2016-06-22 | 方刚 | Power cable line-to-ground/electricity series fault point searching instrument of electrical device |
| CN106970292A (en) * | 2017-04-27 | 2017-07-21 | 苏州博众精工科技有限公司 | A kind of battery pole piece cuts short-circuit alarming circuit |
| CN106970292B (en) * | 2017-04-27 | 2019-07-26 | 博众精工科技股份有限公司 | A kind of battery pole piece cuts short-circuit alarming circuit |
| CN111502799A (en) * | 2017-09-07 | 2020-08-07 | 天津大创科技有限公司 | Pipeline disconnection detection method |
| US11015750B2 (en) | 2017-09-07 | 2021-05-25 | Tianjin Datro Technology Co., Ltd. | Pipeline detection device and method |
| CN111502799B (en) * | 2017-09-07 | 2022-03-01 | 天津大创科技有限公司 | Pipeline disconnection detection method |
| CN108919131A (en) * | 2018-06-29 | 2018-11-30 | 湖南科霸汽车动力电池有限责任公司 | The detection determination method of battery micro-short circuit |
| CN109962446A (en) * | 2019-04-28 | 2019-07-02 | 西南科技大学城市学院 | Safety utilization of electric power intelligent protection device |
| CN111474461A (en) * | 2020-03-31 | 2020-07-31 | 南京优倍电气有限公司 | Circuit device for detecting failure of switch of functional safety product |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090325 |