CN204101673U - A kind of broken circuit detection circuit - Google Patents
A kind of broken circuit detection circuit Download PDFInfo
- Publication number
- CN204101673U CN204101673U CN201420506247.6U CN201420506247U CN204101673U CN 204101673 U CN204101673 U CN 204101673U CN 201420506247 U CN201420506247 U CN 201420506247U CN 204101673 U CN204101673 U CN 204101673U
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- China
- Prior art keywords
- metal
- oxide
- semiconductor
- resistance
- triode
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Abstract
A kind of broken circuit detection circuit, relates to line maintenance field, comprises metal detector T, operational amplifier U, N channel-type metal-oxide-semiconductor metal-oxide-semiconductor T1 and resistance R1 ~ R4, coupling capacitance C1, C2, direct supply, triode Q1 and LED; A kind of broken circuit detection circuit that the utility model provides, easy non-contact type broken circuit detection circuit is adopted to design, there are the advantages such as small and exquisite, simple, reliable, only several little components and parts composition, volume is very little, and cost is low, by clamping circuit structure, improve antijamming capability and the quality of output signals of testing circuit; By popping one's head near electric wire, and judge electric wire battery core breakpoint by the state of light emitting diode, solve the cost high problem and inefficient problem that need to bring with meter specially.
Description
Technical field
The utility model relates to line maintenance field, is specially a kind of broken circuit detection circuit.
Background technology
When Measuring error electric wire, some electric wire is due to battery core open circuit, need again to repair at breakpoint place, but because there is a layer insulating on electric wire battery core surface, being difficult to find out inner battery core intuitively breaks at which, usually need to use special instrument to detect, but meter specially price also needs thousands of unit at least, and be also unfavorable for carrying with; So just there is the problem of cost height and detection efficiency, but generally small-sized detecting device is easy to be interfered, and causes testing result inaccurate.
Utility model content
The purpose of this utility model is to provide a kind of broken circuit detection circuit, and its simple structure, cost are low, detection is accurate, solves the problem in background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of broken circuit detection circuit, comprises metal detector T, operational amplifier U, N channel-type metal-oxide-semiconductor T1 and resistance R1 ~ R4, coupling capacitance C1, C2, direct supply, triode Q1 and LED; The drain electrode of described metal-oxide-semiconductor T1 connects the positive pole connecting direct supply through resistance R1, the grid of metal-oxide-semiconductor T1 is connected with the output terminal of operational amplifier U and resistance R2 one end, the other end ground connection of resistance R2, the source electrode of metal-oxide-semiconductor T1 is through resistance R3 ground connection, operational amplifier U reverse input end ground connection, the positive input of operational amplifier U is connected with metal detector T by coupling capacitance C1; The drain electrode of metal-oxide-semiconductor T1 is also connected with the base stage of triode Q1 by coupling capacitance C2, the drain electrode of metal-oxide-semiconductor T1 and the circuit of coupling capacitance C2 are provided with the diode D1 preventing electric current from being flow backwards by triode Q1 base stage, the collector of triode Q1 is connected with one end of LED by resistance R2, the other end of LED is connected between the positive pole of direct supply and resistance R1, the emitter of the negative pole connecting triode Q1 of direct supply, the emitter also ground connection of triode Q1.
Further, the positive lead road of described LED and direct supply BT is provided with switch.
Further, described operational amplifier U is one pole operational amplifier.
In sum, a kind of broken circuit detection circuit that the utility model provides, easy non-contact type broken circuit detection circuit is adopted to design, there are the advantages such as small and exquisite, simple, reliable, only several little components and parts composition, volume is very little, and cost is low, by clamping circuit structure, improve antijamming capability and the quality of output signals of testing circuit; By popping one's head near electric wire, and judge electric wire battery core breakpoint by the state of light emitting diode, solve the cost high problem and inefficient problem that need to bring with meter specially.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
A kind of broken circuit detection circuit as shown in Figure 1, comprises metal detector T, operational amplifier U, N channel-type metal-oxide-semiconductor T1 and resistance R1 ~ R4, coupling capacitance C1, C2, direct supply BT, triode Q1 and LED, the drain electrode of described metal-oxide-semiconductor T1 connects the positive pole connecting direct supply BT through resistance R1, the grid of metal-oxide-semiconductor T1 is connected with the output terminal out of operational amplifier U and resistance R2 one end, the other end ground connection of resistance R2, the source electrode of metal-oxide-semiconductor T1 is through resistance R3 ground connection, operational amplifier U reverse input end ground connection, the positive input of operational amplifier U is connected with metal detector T by coupling capacitance C1, the drain electrode of metal-oxide-semiconductor T1 is also connected with the base stage of triode Q1 by coupling capacitance C2, the drain electrode of metal-oxide-semiconductor T1 and the circuit of coupling capacitance C2 are provided with the diode D1 preventing electric current from being flow backwards by triode Q1 base stage, the collector of triode Q1 is connected with one end of LED by resistance R2, the other end of LED is connected between the positive pole of direct supply BT and resistance R1, the positive lead road of LED and direct supply BT is provided with switch S, the emitter of the negative pole connecting triode Q1 of direct supply BT, the emitter also ground connection of triode Q1, described operational amplifier U is one pole operational amplifier, and power is little, and energy consumption is low, calculate amplifier U, metal-oxide-semiconductor T1 and resistance R1 ~ R3 and coordinate formation clamping circuit, amplify and clamping action the electric signal transmitted by coupling capacitance C1, make electric signal more stable, antijamming capability improves greatly.
The implementation procedure of electric wire broken circuit detection circuit when overhauling circuit is as follows:
1, first, tested wire is connected the live wire of AC power, 2, then, close S1 switch, with hand-held metal probe T, its metallic member is moved along wire surface, the following two kinds testing result state will be there will be: one, when the non-circuit breaker part of tested wire, metal probe can sense electric signal, operational amplifier U is coupled to by coupling capacitance C1, the grid being transferred to metal-oxide-semiconductor T1 after rectification is stablized through operational amplifier U, electric signal is after metal-oxide-semiconductor T1 amplifies, the base stage of triode Q1 is coupled to by coupling capacitance C2, now base stage is high level, triode Q1 conducting, LED 1 is bright, show that tested electric wire is herein without open circuit, two, when circuit breaker part appears in tested wire, metal probe T can not sense electric signal, and metal-oxide-semiconductor T1 and triode Q1 triode are all in cut-off state, and LED does not work, and shows herein without electric signal, can judge it is trip point herein.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. a broken circuit detection circuit, is characterized in that: comprise metal detector T, operational amplifier U, N channel-type metal-oxide-semiconductor T1 and resistance R1 ~ R4, coupling capacitance C1, C2, direct supply, triode Q1 and LED; The drain electrode of described metal-oxide-semiconductor T1 connects the positive pole connecting direct supply through resistance R1, the grid of metal-oxide-semiconductor T1 is connected with the output terminal of operational amplifier U and resistance R2 one end, the other end ground connection of resistance R2, the source electrode of metal-oxide-semiconductor T1 is through resistance R3 ground connection, operational amplifier U reverse input end ground connection, the positive input of operational amplifier U is connected with metal detector T by coupling capacitance C1; The drain electrode of metal-oxide-semiconductor T1 is also connected with the base stage of triode Q1 by coupling capacitance C2, the drain electrode of metal-oxide-semiconductor T1 and the circuit of coupling capacitance C2 are provided with the diode D1 preventing electric current from being flow backwards by triode Q1 base stage, the collector of triode Q1 is connected with one end of LED by resistance R2, the other end of LED is connected between the positive pole of direct supply and resistance R1, the emitter of the negative pole connecting triode Q1 of direct supply, the emitter also ground connection of triode Q1.
2. a kind of broken circuit detection circuit according to claim 1, is characterized in that: on the positive lead road of described LED and direct supply BT, be provided with switch.
3. a kind of broken circuit detection circuit according to claim 1, is characterized in that: described operational amplifier U is one pole operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506247.6U CN204101673U (en) | 2014-09-04 | 2014-09-04 | A kind of broken circuit detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506247.6U CN204101673U (en) | 2014-09-04 | 2014-09-04 | A kind of broken circuit detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204101673U true CN204101673U (en) | 2015-01-14 |
Family
ID=52270090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420506247.6U Expired - Fee Related CN204101673U (en) | 2014-09-04 | 2014-09-04 | A kind of broken circuit detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204101673U (en) |
-
2014
- 2014-09-04 CN CN201420506247.6U patent/CN204101673U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20170904 |