CN2325783Y - Comprehensive type instrument for locating faults in communication cable - Google Patents
Comprehensive type instrument for locating faults in communication cable Download PDFInfo
- Publication number
- CN2325783Y CN2325783Y CN 98221072 CN98221072U CN2325783Y CN 2325783 Y CN2325783 Y CN 2325783Y CN 98221072 CN98221072 CN 98221072 CN 98221072 U CN98221072 U CN 98221072U CN 2325783 Y CN2325783 Y CN 2325783Y
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- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- input end
- capacitor
- output terminal
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- 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 - Lifetime
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- Measurement Of Resistance Or Impedance (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model provides a comprehensive type instrument for locating faults in communication cables, namely an A/D converter, a resistor test circuit, a control switch, and a bridge type balance detection circuit are additionally arranged on the utility model on the basis of an original pulse-typed test circuit, wherein, the output end of the bridge type balance detection circuit is connected with an SCM through the A/D converter. The SCM controls the resistor test circuit through the control switch and receives, processes, and displays test signals outputted by the resistor test circuit through the A/D converter. The utility model integrates pulse reflection methods and bridge methods into a whole. The utility model not only keeps the function of testing positions of wire breaking obstacle points and cross obstacle points but also adds to the function of testing positions of telluric effluvium obstacle points and poor insulation obstacle points.
Description
The utility model provides a kind of comprehensive telecommunication cable failure tester, belongs to telecommunication cable fault test instrument field.
Most of products in the telecommunication cable failure tester are to adopt the pulse-reflection principle technical design at present, mainly be by pulse emission and receiving circuit, High Speed Data Acquisition Circuit, single-chip microcomputer, keyboard and display are formed, as Chinese patent communique disclosed utility model patent on March 17th, 1993: local cable obstacle intelligent tester, application number: 92211469, applicant: Kehui Inst. of Electric Power Instruments, Zibo, the method of utilizing Control Technique of Microcomputer to combine with the pulse shooting method, by power supply, cpu circuit, pulse emission and receiving circuit, liquid crystal display circuit and keyboard input circuit are formed, by the High Speed Data Acquisition Circuit and the internal balance circuit of perfect in shape and function, effect is better when test broken string and swinging cross obstacle.But when test ground vapour defective insulation obstacle, to compare difference little because of the input impedance and the line characteristic impedance of barrier point, so such testing tool can't be tested the position of this type of barrier point.
In traditional telecommunication cable fault test, people once used the electric bridge of excessive sensitivity to test the position of swinging cross, ground vapour, defective insulation constant resistance sexual dysfunction point, and obtained reasonable effect, defective is complicated operation, calculates loaded down with trivial details, the difficult grasp, and can't test the position of broken string barrier point.
The purpose of this utility model provides the advantage separately of a kind of integrated pulse reflectometry and bridge method, and both are combined, can test broken string and swinging cross barrier point, can test the comprehensive telecommunication cable failure tester of ground vapour and defective insulation constant resistance sexual dysfunction point again.
The purpose of this utility model is achieved in that
Comprise the impulse type test circuit of forming by pulse emission and receiving circuit, High Speed Data Acquisition Circuit, single-chip microcomputer, keyboard and display, it is characterized in that: set up A/D converter, resistance test circuit, gauge tap JH
1～3, potentiometer RW and bridge type balance detection circuit, wherein the output terminal of A/D converter connects single-chip microcomputer, its input end is through gauge tap JH
1Connect bridge type balance detection circuit or resistance test circuit, potentiometer RW by single-chip microcomputer through gauge tap JH
2～3Control is connected with an input end of resistance test circuit or test lead B, bridge type balance detection circuit respectively, and another input end of bridge type balance detection circuit is another test lead A of this instrument.
Described comprehensive telecommunication cable failure tester, gauge tap JH
1～3Can be relay J H
1～3
Described comprehensive telecommunication cable failure tester, the bridge type balance detection circuit comprises operational amplifier A
1～3, resistance R
1～9, potentiometer RW
1, inductance L
1～2, capacitor C
1～7With diode D
1～2, input end P wherein
1Be a test lead A of this tester, and through inductance L
1Connect capacitor C respectively
1And resistance R
1, capacitor C
1Other end ground connection, resistance R
1Another termination operational amplifier A
1Positive input terminal, another input end P
2Succeed electrical equipment JH
2Normally closed contact, and successively through inductance L
2And capacitor C
2Ground connection, successively through inductance L
2And resistance R
2Connect operational amplifier A
2Positive input terminal, operational amplifier A
1～2Positive input terminal between and be connected to capacitor C
3, diode D
1～2With potentiometer RW
1, be connected to resistance R between its negative input end
3, and operational amplifier A
1Negative input end and output terminal between and be connected to resistance R
4And capacitor C
4, operational amplifier A
2Negative input end and output terminal between and be connected to resistance R
5And capacitor C
5, operational amplifier A
1Output terminal through resistance R
6Connect operational amplifier A respectively
3Positive input terminal, resistance R
8And capacitor C
6, and resistance R
8And capacitor C
6Other end ground connection, operational amplifier A
2Output terminal through resistance R
7Connect operational amplifier A respectively
3Negative input end, resistance R
9And capacitor C
7, resistance R
9And capacitor C
7The other end and operational amplifier A
3Output terminal succeed electrical equipment JH after joining
1Normally closed contact.
Described comprehensive telecommunication cable failure tester, the resistance test circuit comprises operational amplifier A
4～5, resistance R
10～12, voltage stabilizer DW and potentiometer RW
2, power supply V wherein
CCThrough resistance R
10Meet voltage stabilizer DW and potentiometer RW respectively
2, the other end ground connection of voltage stabilizer DW wherein, potentiometer RW
2Another termination operational amplifier A
4Negative input end, operational amplifier A
4Positive input terminal ground connection, its output terminal is through the resistance resistance R
11Connect operational amplifier A
5Negative input end, and operational amplifier A
4Negative input end and output terminal as reception measuring resistance calibrating terminal Y
1, Y
2Correspondence is succeeded electrical equipment JH
2～3Normal opened contact, operational amplifier A
5Positive input terminal ground connection, its output relay termination JH
1Normal opened contact, and operational amplifier A
5Negative input end and its output terminal between be connected to resistance R
12
Described comprehensive telecommunication cable failure tester, relay J H
2～3In be connected to potentiometer RW between taking out a little, and relay J H
2Normally closed contact meet the input end P of bridge type balance detection circuit
2, relay J H
3Normally closed contact meet another test lead B of this tester.
Described comprehensive telecommunication cable failure tester, the A/D converter output terminal connects the data bus of single-chip microcomputer, its input relay termination JH
1In take out a little.
Principle of work is: with pulse reflection method test broken string and the same prior art of swinging cross obstacle technology, and set up with electric bridge and tested ground vapour, defective insulation constant resistance sexual dysfunction point.Relay J H
1～3All be subjected to the control of single-chip microcomputer, as relay J H
1～3When being static state, entire circuit is the balance test state.Obstacle cable core L is surveyed in calibrating terminal A reception
1, calibrating terminal B meets a pair of intact auxiliary heart yearn L in the same cable
0, and with heart yearn L
1, auxiliary heart yearn L
0Another terminal short circuit, will with heart yearn L
1The barrier line L of (as defective insulation) is associated
2Connect an auxiliary DC power supply, like this, obstacle cable to be measured is constituted a measuring bridge through auxiliary heart yearn and bridge type balance detection circuit, potentiometer RW.Adjust potentiometer RW, can adjust bridge type balance detection circuit input end P
1, P
2Between potential difference (PD), this potential difference (PD) exports the single-chip microcomputer calculation process to through A/D converter after bridge type balance detection circuit processing and amplifying, and display result.When showing that this potential difference (PD) is 0, show that electric bridge is in equilibrium state, at this moment, potentiometer RW is the circuit loop resistance value of barrier point to be measured to terminal.Subsequently, the Single-chip Controlling actuating of relay, potentiometer RW is connected to the resistance test circuit, the resistance of potentiometer RW is transformed into the voltage signal of a linear correspondence by the resistance test circuit, and export the data bus of single-chip microcomputer to through A/D converter, single-chip microcomputer is according to the resistivity of cable under test heart yearn, can calculate the distance of barrier point to terminal by the value of potentiometer RW, and display result.
The utility model compared with prior art, pulse-echo ranging technology and balanced bridge ranging technology are organically combined together, under the unified control and management of single-chip microcomputer, learn from other's strong points to offset one's weaknesses mutually, can test the position of broken string, swinging cross barrier point, can test the position of ground vapour, defective insulation barrier point again, simple in structure, easy to operate, dependable performance is the more complete comprehensive telecommunication cable failure tester of a kind of test function.
Fig. 1 is a fundamental diagram of the present utility model;
Fig. 2 is the circuit diagram of the utility model bridge type balance detection circuit embodiment;
Fig. 3 is the circuit diagram of the utility model resistance test circuit embodiments;
The utility model is described in further detail below in conjunction with accompanying drawing:
One input end P of bridge type balance detection circuit
1Be the detection terminal A of tester, successively through inductance L
1, capacitor C
1Ground connection and successively through inductance L
1, resistance R
1Connect operational amplifier A
1Positive input terminal, another input end P of bridge type balance detection circuit
2Succeed electrical equipment JH
2Normally closed contact, and successively through inductance L
2, capacitor C
2Ground connection and successively through inductance L
2, resistance R
2Connect operational amplifier A
2Positive input terminal, operational amplifier A
1～2Positive input terminal between also and be connected to capacitor C
3, diode D
1～2With potentiometer RW
1, potentiometer RW wherein
1In take out a ground connection, be connected to resistance R between its negative input end
3, and operational amplifier A
1Negative input end and output terminal between and be connected to resistance R
4And capacitor C
4, operational amplifier A
2Negative input end and output terminal between and be connected to resistance R
5And capacitor C
5, operational amplifier A
1Output terminal through resistance R
6Connect operational amplifier A respectively
3Positive input terminal, resistance R
8And capacitor C
6, and resistance R
8And capacitor C
6Other end ground connection, operational amplifier A
2Output terminal through resistance R
7Connect operational amplifier A respectively
3Negative input end, resistance R
9And capacitor C
7, resistance R
9And capacitor C
7The other end and operational amplifier A
3Output terminal succeed electrical equipment JH after joining
1Normally closed contact, relay J H
1In take out the data bus that a little connects single-chip microcomputer through A/D converter.Another detection terminal B of tester succeeds electrical equipment JH
3Normally closed contact, relay J H
2～3In be connected to potentiometer RW between taking out a little, as the calibrating terminal Y of testing resistance in the resistance test circuit
1, Y
2Correspondence is succeeded electrical equipment JH
2～3Normal opened contact and operational amplifier A
4Negative input end and output terminal.In the resistance test circuit, power supply V
CCThrough resistance R
10Meet voltage stabilizer DW and potentiometer RW respectively
2, the other end ground connection of voltage stabilizer DW wherein, potentiometer RW
2Another termination operational amplifier A
4Negative input end, operational amplifier A
4Positive input terminal ground connection, its output terminal is through resistance R
11Connect operational amplifier A
5Negative input end, operational amplifier A
5Positive input terminal ground connection, its output relay termination JH
1Normal opened contact, and operational amplifier A
5Negative input end and its output terminal between be connected to resistance R
12
Claims (6)
1, a kind of comprehensive telecommunication cable failure tester, comprise the impulse type test circuit of forming by pulse emission and receiving circuit, High Speed Data Acquisition Circuit, single-chip microcomputer, keyboard and display, it is characterized in that: set up A/D converter, resistance test circuit, gauge tap JH
1～3, potentiometer RW and bridge type balance detection circuit, wherein the output terminal of A/D converter connects single-chip microcomputer, its input end connects bridge type balance detection circuit or resistance test circuit through gauge tap JH1, potentiometer RW by single-chip microcomputer through gauge tap JH
2～3Control is connected with an input end of resistance test circuit or test lead B, bridge type balance detection circuit respectively, and another input end of bridge type balance detection circuit is another test lead A of this instrument.
2, comprehensive telecommunication cable failure tester as claimed in claim 1 is characterized in that: gauge tap JH
1～3Can be relay J H
1～3
3, comprehensive telecommunication cable failure tester as claimed in claim 1, it is characterized in that: the bridge type balance detection circuit comprises operational amplifier A
1～3, resistance R
1～9, potentiometer RW
1, inductance L
1～2, capacitor C
1～7With diode D
1～2, input end P wherein
1Be a test lead A of this tester, and through inductance L
1Connect capacitor C respectively
1And resistance R
1, capacitor C
1Other end ground connection, resistance R
1Another termination operational amplifier A
1Positive input terminal, another input end P
2Succeed electrical equipment JH
2Normally closed contact, and successively through inductance L
2And capacitor C
2Ground connection, successively through inductance L
2And resistance R
2Connect operational amplifier A
2Positive input terminal, operational amplifier A
1～2Positive input terminal between and be connected to capacitor C
3, diode D
1～2With potentiometer RW
1, be connected to resistance R between its negative input end
3, and operational amplifier A
1Negative input end and output terminal between and be connected to resistance R
4And capacitor C
4, operational amplifier A
2Negative input end and output terminal between and be connected to resistance R
5And capacitor C
5, operational amplifier A
1Output terminal through resistance R
6Connect operational amplifier A respectively
3Positive input terminal, resistance R
8And capacitor C
6, and resistance R
8And capacitor C
6Other end ground connection, operational amplifier A
2Output terminal through resistance R
7Connect operational amplifier A respectively
3Negative input end, resistance R
9And capacitor C
7, resistance R
9And capacitor C
7The other end and operational amplifier A
3Output terminal succeed electrical equipment JH after joining
1Normally closed contact.
4, comprehensive telecommunication cable failure tester as claimed in claim 1, it is characterized in that: the resistance test circuit comprises operational amplifier A
4～5, resistance R
10～12, voltage stabilizer DW and potentiometer RW
2, wherein power supply VCC is through resistance R
10Meet voltage stabilizer DW and potentiometer RW respectively
2, the other end ground connection of voltage stabilizer DW wherein, potentiometer RW
2Another termination operational amplifier A
4Negative input end, operational amplifier A
4Positive input terminal ground connection, its output terminal connects operational amplifier A through resistance resistance R 11
5Negative input end, and operational amplifier A
4Negative input end and output terminal as reception measuring resistance calibrating terminal Y
1, Y
2, correspondence is succeeded electrical equipment JH
2～3Normal opened contact, operational amplifier A
5Positive input terminal ground connection, its output relay termination JH
1Normal opened contact, and operational amplifier A
5Negative input end and its output terminal between be connected to resistance R
12
5, comprehensive telecommunication cable failure tester as claimed in claim 2 is characterized in that: relay J H
2～3In be connected to potentiometer RW between taking out a little, and relay J H
2Normally closed contact meet the input end P of bridge type balance detection circuit
2, relay J H
3Normally closed contact meet another test lead B of this tester.
6, as claim 1,2 described comprehensive telecommunication cable failure testers, it is characterized in that: the A/D converter output terminal connects the data bus of single-chip microcomputer, its input relay termination JH
1In take out a little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98221072 CN2325783Y (en) | 1998-05-08 | 1998-05-08 | Comprehensive type instrument for locating faults in communication cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98221072 CN2325783Y (en) | 1998-05-08 | 1998-05-08 | Comprehensive type instrument for locating faults in communication cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2325783Y true CN2325783Y (en) | 1999-06-23 |
Family
ID=33972720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98221072 Expired - Lifetime CN2325783Y (en) | 1998-05-08 | 1998-05-08 | Comprehensive type instrument for locating faults in communication cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2325783Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486964A (en) * | 2015-11-25 | 2016-04-13 | 上海斐讯数据通信技术有限公司 | Device and method for testing USB cable performance |
| CN105785228A (en) * | 2016-04-14 | 2016-07-20 | 无锡南理工科技发展有限公司 | Multifunctional communication cable fault tester |
| CN106353643A (en) * | 2016-11-09 | 2017-01-25 | 雷细军 | Resistance proportion cable fault tester |
| CN109031042A (en) * | 2018-07-16 | 2018-12-18 | 国网重庆市电力公司电力科学研究院 | A kind of wire and cable quality detecting system |
-
1998
- 1998-05-08 CN CN 98221072 patent/CN2325783Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486964A (en) * | 2015-11-25 | 2016-04-13 | 上海斐讯数据通信技术有限公司 | Device and method for testing USB cable performance |
| CN105785228A (en) * | 2016-04-14 | 2016-07-20 | 无锡南理工科技发展有限公司 | Multifunctional communication cable fault tester |
| CN106353643A (en) * | 2016-11-09 | 2017-01-25 | 雷细军 | Resistance proportion cable fault tester |
| CN106353643B (en) * | 2016-11-09 | 2019-05-28 | 雷细军 | Resistance ratio electric cable failure detector |
| CN109031042A (en) * | 2018-07-16 | 2018-12-18 | 国网重庆市电力公司电力科学研究院 | A kind of wire and cable quality detecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |