CN202075365U - Cable short circuit detecting device - Google Patents
Cable short circuit detecting device Download PDFInfo
- Publication number
- CN202075365U CN202075365U CN2011201278124U CN201120127812U CN202075365U CN 202075365 U CN202075365 U CN 202075365U CN 2011201278124 U CN2011201278124 U CN 2011201278124U CN 201120127812 U CN201120127812 U CN 201120127812U CN 202075365 U CN202075365 U CN 202075365U
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- CN
- China
- Prior art keywords
- cable
- effect pipe
- voltage
- connects
- short circuit
- 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.)
- Expired - Fee Related
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to a cable short circuit detecting device, which adopts the technical scheme that a detecting circuit is that an anode input end of a voltage comparator D is connected with one end (1) of a cable L, a cathode generates a circuit A by a reference voltage, a current-voltage conversion element RS is connected with the other end (2) of the cable L, and the output end of the voltage comparator D is connected with a Tout. The cable short circuit detecting device is simple in structure, convenient for use, and high in detecting accuracy, and has higher stability and reliability.
Description
Technical field
The utility model relates to a kind of pick-up unit, is specifically related to a kind of whether cable short circuit pick-up unit of short circuit of test cable that is used for.
Background technology
At present, check whether classic method is adopted in short circuit to cable, can only measure whether short circuit of cable, and can not be clear and definite measure short circuit the time each physical quantity.
Summary of the invention
The purpose of this utility model is exactly at existing situation, provides a kind of simple in structure, easy to use, and the high cable short circuit pick-up unit of accuracy in detection.
Its technical scheme is: testing circuit is the end 1 that voltage comparator D electrode input end meets cable L, and negative pole is by reference voltage generating circuit A, current-voltage inverting element R
SThe other end 2 of stube cable L, voltage comparator output terminal Tout.
Reference voltage generating circuit A is that the drain electrode of metal-oxide-semiconductor field effect transistor Q1 connects voltage vcc, and source electrode connects the drain electrode of effect pipe Q3, and grid connects the drain electrode of grid and the effect pipe Q3 of effect pipe Q2 respectively.The drain electrode of effect pipe Q2 connects voltage vcc, and source electrode connects divider resistance R11 and R12, and the grid of effect pipe Q3 also links to each other with the source electrode of effect pipe Q2.
Beneficial effect: the utility model utilizes the current-voltage conversion element that the input current of cable is transformed into voltage, voltage that relatively was transformed and reference voltage, and the output signal of corresponding its magnitude relationship of output.This device detects accurately, and has advantages of higher stability.
Description of drawings
Accompanying drawing 1 is the structural drawing of present embodiment current detection circuit.
Accompanying drawing 2 is schematic diagrams of reference voltage generating circuit.
Embodiment
Be further described below in conjunction with accompanying drawing: testing circuit is the end 1 that voltage comparator D electrode input end meets cable L, and negative pole is by reference voltage generating circuit A, electric current one voltage transformation element R
SThe other end 2 of stube cable L, voltage comparator output terminal Tout.Reference voltage generating circuit A is that the drain electrode of metal-oxide-semiconductor field effect transistor Q1 connects voltage vcc, and source electrode connects the drain electrode of effect pipe Q3, and grid connects the drain electrode of grid and the effect pipe Q3 of effect pipe Q2 respectively.The drain electrode of effect pipe Q2 connects voltage vcc, and source electrode connects divider resistance R11 and R12, and the grid of effect pipe Q3 also links to each other with the source electrode of effect pipe Q2.
Principle of work: by current-voltage conversion element R
SThe input current of cable is transformed into voltage, by voltage comparator D the voltage and the reference voltage of conversion is compared then, voltage comparator output terminal Tout exports the result.
Claims (2)
1. cable short circuit pick-up unit, it is characterized in that: testing circuit is the end (1) that voltage comparator D electrode input end meets cable L, negative pole is by the other end (2) of reference voltage generating circuit A, current-voltage inverting element RS stube cable L, voltage comparator output terminal Tout.
2. cable short circuit pick-up unit according to claim 1, it is characterized in that: reference voltage generating circuit A connects voltage vcc by the drain electrode of metal-oxide-semiconductor field effect transistor Q1, source electrode connects the drain electrode of effect pipe Q3, grid connects the drain electrode of grid and the effect pipe Q3 of effect pipe Q2 respectively, the drain electrode of effect pipe Q2 connects voltage vcc, source electrode connects divider resistance R11 and R12, and the grid of effect pipe Q3 links to each other with the source electrode of effect pipe Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201278124U CN202075365U (en) | 2011-04-16 | 2011-04-16 | Cable short circuit detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201278124U CN202075365U (en) | 2011-04-16 | 2011-04-16 | Cable short circuit detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202075365U true CN202075365U (en) | 2011-12-14 |
Family
ID=45113462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201278124U Expired - Fee Related CN202075365U (en) | 2011-04-16 | 2011-04-16 | Cable short circuit detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202075365U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614643A (en) * | 2015-01-30 | 2015-05-13 | 加弘科技咨询(上海)有限公司 | Device and method for detecting short circuit location in line |
-
2011
- 2011-04-16 CN CN2011201278124U patent/CN202075365U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614643A (en) * | 2015-01-30 | 2015-05-13 | 加弘科技咨询(上海)有限公司 | Device and method for detecting short circuit location in line |
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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 |
Granted publication date: 20111214 Termination date: 20150416 |
|
| EXPY | Termination of patent right or utility model |