CN103364675A - Wire disconnection detecting circuit and wire disconnection detecting device - Google Patents
Wire disconnection detecting circuit and wire disconnection detecting device Download PDFInfo
- Publication number
- CN103364675A CN103364675A CN2012100920989A CN201210092098A CN103364675A CN 103364675 A CN103364675 A CN 103364675A CN 2012100920989 A CN2012100920989 A CN 2012100920989A CN 201210092098 A CN201210092098 A CN 201210092098A CN 103364675 A CN103364675 A CN 103364675A
- Authority
- CN
- China
- Prior art keywords
- electric wire
- electrically connected
- detection circuit
- switching tube
- voltage amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention belongs to the field of line maintenance, and discloses a non-contact wire disconnection detecting circuit and a wire disconnection detecting device. The wire disconnection detecting circuit comprises a metal probe and a first coupling capacitor, wherein the first coupling capacitor is electrically connected between the metal probe and a control end of a voltage amplifier, an input end and an output end of the voltage amplifier are electrically connected to a positive electrode and a negative electrode of a DC power supply respectively, a control end of a switching tube is electrically connected with the control end of the voltage amplifier through a second coupling capacitor, an input end of the switching tube is electrically connected with a negative electrode of a light emitting diode, a positive electrode of the light emitting diode is electrically connected with the positive electrode of the DC power supply, and an output end of the switching tube is electrically connected with the negative electrode of the DC power supply. The wire disconnection detecting circuit provided by the invention is formed by only a few small components and very small is size, and can be carried around. The cost is only about ten yuan or less, thereby being very low in cost. A disconnection point of an electric wire core is judged through putting the probe close to the wire and observing the state of the light emitting diode, thereby greatly improving the detection efficiency.
Description
Technical field
The present invention relates to the line maintenance field, relate in particular to a kind of touchless electric wire broken circuit detection circuit and electric wire disconnection detection device.
Background technology
When detecting the maintenance electric wire, some electric wire opens circuit owing to battery core, need again to repair at the breakpoint place, but because there is a layer insulating on electric wire battery core surface, being difficult to find out intuitively inner battery core breaks at which, usually need to use special-purpose instrument to detect, but the meter specially price also needs thousands of units at least, and also be unfavorable for carrying; So just have the problem of cost height and detection efficiency.
Summary of the invention
One of problem to be solved by this invention is to provide the electric wire that a kind of cost is low, efficient is high broken circuit detection circuit.
A kind of electric wire broken circuit detection circuit comprises metal probe, the first coupling capacitance, the second coupling capacitance, voltage amplifier, switching tube, light emitting diode and direct supply; Wherein,
Metal probe is electrically connected with the control end of voltage amplifier by the first coupling capacitance, and the input end of voltage amplifier is connected with output terminal with the positive pole of direct supply and is connected with negative electricity;
The control end of switching tube is electrically connected with the input end of voltage amplifier by the second coupling capacitance, and the input end of switching tube is connected with the negative electricity of light emitting diode, and the positive pole of light emitting diode is electrically connected with the positive pole of direct supply; The output terminal of switching tube is connected with the negative electricity of direct supply.
Described electric wire broken circuit detection circuit also comprises diode, and the negative pole of this diode is electrically connected with the control end of switching tube, and this diode cathode is electrically connected with the second coupling capacitance.
Described electric wire broken circuit detection circuit also comprises the first current-limiting resistance; One end of this first current-limiting resistance is electrically connected with the tie point of the second coupling capacitance with the control end of voltage amplifier, and the other end is electrically connected with the positive pole of direct supply.
Described electric wire broken circuit detection circuit also comprises the second current-limiting resistance; One end of this second current-limiting resistance is electrically connected with the input end of switching tube, and the other end is connected with the negative electricity of light emitting diode.
Described electric wire broken circuit detection circuit also comprises divider resistance; This divider resistance is connected between the control end and output terminal of voltage amplifier.
In the said wires broken circuit detection circuit, described voltage amplifier is metal-oxide-semiconductor, and the control end of voltage amplifier is the grid of metal-oxide-semiconductor, and the input end of voltage amplifier is the drain electrode of metal-oxide-semiconductor, and the output terminal of voltage amplifier is the source electrode of metal-oxide-semiconductor.
In the said wires broken circuit detection circuit, described switching tube is triode, and the control end of switching tube is the base stage of triode, and the input end of switching tube is the collector of triode, and the output terminal of switching tube is the emitter of triode.
In the said wires broken circuit detection circuit, this electric wire broken circuit detection circuit also comprises switch; One end of this switch is electrically connected with the positive pole of light emitting diode, and the other end is electrically connected with the positive pole of direct supply.
In the said wires broken circuit detection circuit, the voltage of described direct supply is 9V.
Two of problem to be solved by this invention is to provide a kind of electric wire disconnection detection device, and this circuit checker comprises the said wires broken circuit detection circuit.
Electric wire broken circuit detection circuit provided by the invention adopts the design of easy non-contact type broken circuit detection circuit, and the advantages such as small and exquisite, simple, reliable are arranged, and only several little components and parts form, and volume is very little, can carry, and cost is very low also only in ten yuan; By will popping one's head near electric wire, and judge electric wire battery core breakpoint by the state of light emitting diode, solved need to be with the cost that meter specially brings high problem and the low problem of efficient.
Description of drawings
Fig. 1 is the electric wire broken circuit detection circuit schematic diagram of preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
The electric wire broken circuit detection circuit that this preferred embodiment provides as shown in Figure 1, comprises metal probe T, the first coupling capacitance C1, the second coupling capacitance C2, voltage amplifier Q1, switching tube Q2, LED 1 and direct supply BT1; Wherein,
Metal probe T is electrically connected with the control end of voltage amplifier Q1 by the first coupling capacitance C1, and the input end of voltage amplifier Q1 and output terminal are connected with negative electricity with the positive pole of direct supply BT1 respectively;
The control end of switching tube Q2 is electrically connected with the input end of voltage amplifier Q1 by the second coupling capacitance C2, and the input end of switching tube Q2 is connected with the negative electricity of LED 1, and the positive pole of LED 1 is electrically connected with the positive pole of direct supply BT1; The output terminal of switching tube Q2 is connected with the negative electricity of direct supply BT1.
In this electric wire broken circuit detection circuit, the material of metal probe T can be selected copper cash aluminum steel commonly used; For guaranteeing personal safety, the hand of metal probe T takes part must adopt insulation processing, such as, apply mechanically insulation rubber sleeve etc.
In this electric wire broken circuit detection circuit, the effect of voltage amplifier Q1 is: metal probe T is sensed electromotive force amplify.The preferred N-channel MOS pipe of voltage amplifier Q1, like this, the control end of voltage amplifier Q1 is the grid of metal-oxide-semiconductor, and the input end of voltage amplifier Q1 is the drain electrode of metal-oxide-semiconductor, and the output terminal of voltage amplifier Q1 is the source electrode of metal-oxide-semiconductor.
In this electric wire broken circuit detection circuit, switching tube Q2 mainly has been on-off action, conducting when its control end is high level, but control end ends when being low level; The preferred NPN type of switching tube Q2 triode, the control end of switching tube Q2 is the base stage of triode, and the input end of switching tube Q2 is the collector of triode, and the output terminal of switching tube Q2 is the emitter of triode.
In this electric wire broken circuit detection circuit, preferred the second coupling capacitance C2 is electrochemical capacitor, and the positive pole of the second coupling capacitance C2 is electrically connected with the drain electrode of metal-oxide-semiconductor Q1, and the negative pole of the second coupling capacitance C2 is electrically connected with the source electrode of metal-oxide-semiconductor Q1.
In this electric wire broken circuit detection circuit, the voltage of direct supply is 9V, adopts dry cell power supply.
As the further improvement of this embodiment scheme, as shown in Figure 1, the electric wire broken circuit detection circuit also should comprise diode D1, and this diode D1 plays the electric current backflow effect that prevents; The positive pole of this diode D1 is connected with the negative electricity of the second coupling capacitance C2, and the negative pole of this diode D1 is electrically connected with the base stage of triode Q2.
Again further improvement project as the present embodiment, as shown in Figure 1, described electric wire broken circuit detection circuit also comprises the first current-limiting resistance R2 and the second current-limiting resistance R3, electric current to testing circuit plays metering function, avoid burning out electronic devices and components because circuital current is excessive, such as metal-oxide-semiconductor Q1, triode Q2 etc.The end of the first current-limiting resistance R2 is electrically connected with the collector of metal-oxide-semiconductor Q1 and the tie point of the second coupling capacitance C2, and the other end is electrically connected with the positive pole of direct supply BT1; The end of the second current-limiting resistance R3 is electrically connected with the collector of triode Q2, and the other end is connected with the negative electricity of LED 1.
As the further improvement project of the present embodiment, as shown in Figure 1, described electric wire broken circuit detection circuit also comprises divider resistance R1, and the rated voltage of avoiding surpassing metal-oxide-semiconductor because of input voltage burns out this metal-oxide-semiconductor; This divider resistance R1 is connected between the grid and source electrode of metal-oxide-semiconductor Q1.
As the preferred version of the present embodiment, as shown in Figure 1, this electric wire broken circuit detection circuit also comprises switch S 1, plays the effect of control direct supply BT1, avoids excessively expending power supply.One end of this switch S 1 is electrically connected with the positive pole of LED 1, and the other end is electrically connected with the positive pole of direct supply BT1.
In above-described embodiment, switching tube Q1 can adopt one-way SCR or metal-oxide-semiconductor.
This preferred embodiment also provides a kind of electric wire disconnection detection device that comprises the described electric wire broken circuit detection circuit of above-mentioned arbitrary technical scheme.
The electric wire broken circuit detection circuit that this preferred embodiment provides adopts easy non-contact type broken circuit detection circuit design, and the advantages such as small and exquisite, simple, reliable are arranged, only several little components and parts form, and volume is very little, can carry, and cost is very low also only in ten yuan; By will popping one's head near electric wire, and judge electric wire battery core breakpoint by the state of light emitting diode, solved need to be with the cost that meter specially brings high problem and the low problem of efficient.
The implementation procedure of electric wire broken circuit detection circuit when the maintenance circuit is as follows:
1, at first, tested wire is connected the live wire of AC power;
2, then, the S1 switch that closes is taken metal probe T with hand, and its metal part is mobile along the electric wire surface, following two kinds of testing result states will occur:
One, when the tested wire part that do not open circuit, metal probe can be sensed electric signal, be coupled to the grid of metal-oxide-semiconductor Q1 by the first coupling capacitance C1, electric signal is after metal-oxide-semiconductor Q1 amplifies, be coupled to the base stage of triode Q2 by the second coupling capacitance C2, this moment, base stage was high level, triode Q2 conducting, LED 1 is bright, shows that tested electric wire is herein without opening circuit;
Two, the part that opens circuit occurs when tested wire, metal probe T can not sense electric signal, and metal-oxide-semiconductor Q1 and triode Q2 triode all are in cut-off state, and LED 1 does not work, and shows herein can to judge it is trip point herein without electric signal.
Should be understood that, above-mentioned statement for preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, and scope of patent protection of the present invention should be as the criterion with claims.
Claims (10)
1. electric wire broken circuit detection circuit, it is characterized in that, comprise metal probe (T), the first coupling capacitance (C1), the second coupling capacitance (C2), voltage amplifier (Q1), switching tube (Q2), light emitting diode (LED1) and direct supply (BT1); Wherein,
Metal probe (T) is electrically connected with the control end of voltage amplifier (Q1) by the first coupling capacitance (C1), and the input end of voltage amplifier (Q1) is connected with output terminal with the positive pole of direct supply (BT1) and is connected with negative electricity;
The control end of switching tube (Q2) is electrically connected with the input end of voltage amplifier (Q1) by the second coupling capacitance (C2), the input end of switching tube (Q2) is connected with the negative electricity of light emitting diode (LED1), and the positive pole of light emitting diode (LED1) is electrically connected with the positive pole of direct supply (BT1); The output terminal of switching tube (Q2) is connected with the negative electricity of direct supply (BT1).
2. electric wire broken circuit detection circuit according to claim 1, it is characterized in that, described electric wire broken circuit detection circuit also comprises diode (D1), the negative pole of this diode (D1) is electrically connected with the control end of switching tube (Q2), and this diode (D1) is anodal to be electrically connected with the second coupling capacitance (C2).
3. electric wire broken circuit detection circuit according to claim 1 is characterized in that, described electric wire broken circuit detection circuit also comprises the first current-limiting resistance (R2); The control end of the same voltage amplifier of one end (Q1) of this first current-limiting resistance (R2) is electrically connected with the tie point of the second coupling capacitance (C2), and the other end is electrically connected with the positive pole of direct supply (BT1).
4. electric wire broken circuit detection circuit according to claim 1 is characterized in that, described electric wire broken circuit detection circuit also comprises the second current-limiting resistance (R3); One end of this second current-limiting resistance (R3) is electrically connected with the input end of switching tube (Q2), and the other end is connected with the negative electricity of light emitting diode (LED1).
5. electric wire broken circuit detection circuit according to claim 1 is characterized in that, described electric wire broken circuit detection circuit also comprises divider resistance (R1); This divider resistance (R1) is connected between the control end and output terminal of voltage amplifier (Q1).
6. according to claim 1 to 5 arbitrary described electric wire broken circuit detection circuits, it is characterized in that, described voltage amplifier (Q1) is metal-oxide-semiconductor, the control end of voltage amplifier (Q1) is the grid of metal-oxide-semiconductor, the input end of voltage amplifier (Q1) is the drain electrode of metal-oxide-semiconductor, and the output terminal of voltage amplifier (Q1) is the source electrode of metal-oxide-semiconductor.
7. electric wire broken circuit detection circuit according to claim 6, it is characterized in that, described switching tube (Q2) is triode, the control end of switching tube (Q2) is the base stage of triode, the input end of switching tube (Q2) is the collector of triode, and the output terminal of switching tube (Q2) is the emitter of triode.
8. electric wire broken circuit detection circuit according to claim 6 is characterized in that, this electric wire broken circuit detection circuit also comprises switch (S1); One end of this switch (S1) is electrically connected with the positive pole of light emitting diode (LED1), and the other end is electrically connected with the positive pole of direct supply (BT1).
9. electric wire broken circuit detection circuit according to claim 8 is characterized in that, the voltage of described direct supply is 9V.
10. an electric wire disconnection detection device is characterized in that, this circuit checker comprises the arbitrary described electric wire broken circuit detection circuit of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100920989A CN103364675A (en) | 2012-03-30 | 2012-03-30 | Wire disconnection detecting circuit and wire disconnection detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100920989A CN103364675A (en) | 2012-03-30 | 2012-03-30 | Wire disconnection detecting circuit and wire disconnection detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103364675A true CN103364675A (en) | 2013-10-23 |
Family
ID=49366466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100920989A Pending CN103364675A (en) | 2012-03-30 | 2012-03-30 | Wire disconnection detecting circuit and wire disconnection detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103364675A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759192A (en) * | 2016-02-24 | 2016-07-13 | 湖南轻创科技有限公司 | Test circuit, communication base station, new energy power plant, electrical equipment, artificial intelligence robot, smart home, and smart electric vehicle |
| CN105759191A (en) * | 2016-02-24 | 2016-07-13 | 湖南轻创科技有限公司 | Test circuit, communication base station, new energy power plant, direct-current power system, artificial intelligence robot, smart home, and smart electric vehicle |
| CN108627730A (en) * | 2018-04-20 | 2018-10-09 | 四川斐讯信息技术有限公司 | A kind of detecting system and method for handle electrode |
| CN111130027A (en) * | 2019-12-18 | 2020-05-08 | 安徽复兴电缆集团有限公司 | Hard core cable breakpoint detection and repair device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048591U (en) * | 1989-04-25 | 1989-11-29 | 郭静蜂 | Contactless electric tester |
| CN2337567Y (en) * | 1998-10-02 | 1999-09-08 | 李广生 | Electric appliance line testing and repairing instrument for vehicle |
| CN2433635Y (en) * | 1999-10-26 | 2001-06-06 | 南航(集团)汕头航空有限公司 | Testing instrument for fault of conducting wire |
| CN201229379Y (en) * | 2008-05-30 | 2009-04-29 | 闫吉京 | Induction electroscope |
| CN201811990U (en) * | 2010-08-26 | 2011-04-27 | 余顺欢 | Multi-purpose electric measuring instrument |
-
2012
- 2012-03-30 CN CN2012100920989A patent/CN103364675A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048591U (en) * | 1989-04-25 | 1989-11-29 | 郭静蜂 | Contactless electric tester |
| CN2337567Y (en) * | 1998-10-02 | 1999-09-08 | 李广生 | Electric appliance line testing and repairing instrument for vehicle |
| CN2433635Y (en) * | 1999-10-26 | 2001-06-06 | 南航(集团)汕头航空有限公司 | Testing instrument for fault of conducting wire |
| CN201229379Y (en) * | 2008-05-30 | 2009-04-29 | 闫吉京 | Induction electroscope |
| CN201811990U (en) * | 2010-08-26 | 2011-04-27 | 余顺欢 | Multi-purpose electric measuring instrument |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759192A (en) * | 2016-02-24 | 2016-07-13 | 湖南轻创科技有限公司 | Test circuit, communication base station, new energy power plant, electrical equipment, artificial intelligence robot, smart home, and smart electric vehicle |
| CN105759191A (en) * | 2016-02-24 | 2016-07-13 | 湖南轻创科技有限公司 | Test circuit, communication base station, new energy power plant, direct-current power system, artificial intelligence robot, smart home, and smart electric vehicle |
| CN105759191B (en) * | 2016-02-24 | 2019-01-04 | 陈式好 | Test method, communication base station, generation of electricity by new energy station, direct current power system, artificial intelligence robot, smart home, intelligent electric motor car |
| CN105759192B (en) * | 2016-02-24 | 2019-02-01 | 唐山国芯晶源电子有限公司 | Test circuit, communication base station, generation of electricity by new energy station, electrical devices, artificial intelligence robot, smart home, intelligent electric motor car |
| CN108627730A (en) * | 2018-04-20 | 2018-10-09 | 四川斐讯信息技术有限公司 | A kind of detecting system and method for handle electrode |
| CN111130027A (en) * | 2019-12-18 | 2020-05-08 | 安徽复兴电缆集团有限公司 | Hard core cable breakpoint detection and repair device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103336168B (en) | A kind of Full-loop alternating-current self-test high-voltage electroscope | |
| CN103364675A (en) | Wire disconnection detecting circuit and wire disconnection detecting device | |
| CN105403790A (en) | Serially-connected arc fault detection circuit and serially-connected arc fault detection method | |
| KR20080025522A (en) | Apparatus for automatically detecting battery polarity | |
| CN202210598U (en) | Dual anti-creeping socket | |
| CN201898656U (en) | Protective circuit of waterlogged mobile terminal circuit board and mobile terminal | |
| CN203422433U (en) | Detection interface structure of network cable insertion | |
| CN205846688U (en) | Small-sized electric leakage overvoltage/undervoltage protection control circuit | |
| CN203551744U (en) | Electric energy meter load switch state detection circuit | |
| CN204794018U (en) | Microcomputer protection, measurement, and control device | |
| CN102857177B (en) | Control and protection circuit for solid-state microwave power amplifier | |
| CN201503473U (en) | Electric leakage protector detector | |
| CN202948081U (en) | Electronic detection device for building fire-fighting equipments | |
| CN203275565U (en) | Multifunctional grounding detector | |
| CN201804038U (en) | Voltage and current measuring device of entire car | |
| CN102081147A (en) | Testing pen capable of displaying direct current and alternating current | |
| CN204719123U (en) | A kind of overvoltage undervoltage detection circuit | |
| CN202712884U (en) | Battery connection detecting circuit and battery charger | |
| CN201229379Y (en) | Induction electroscope | |
| CN201498978U (en) | Battery over-discharge protection circuit | |
| CN106483349B (en) | A kind of mutual inductor secondary side earthing detection protection system | |
| CN204631177U (en) | A kind of single phase low voltage distribution system Fault Pre pick-up unit | |
| CN105021874A (en) | Electronic test pencil based on induction detection circuit | |
| CN203688712U (en) | Low-voltage power distribution branch identification device | |
| CN201601602U (en) | Power supplying device with short circuit protection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131023 |