CN2896306Y - Communication cable circuit detection device - Google Patents
Communication cable circuit detection device Download PDFInfo
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- CN2896306Y CN2896306Y CN 200620110458 CN200620110458U CN2896306Y CN 2896306 Y CN2896306 Y CN 2896306Y CN 200620110458 CN200620110458 CN 200620110458 CN 200620110458 U CN200620110458 U CN 200620110458U CN 2896306 Y CN2896306 Y CN 2896306Y
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Abstract
The utility model relates to communication cable circuit testing device, which is characterized in that the device is composed of a signal transmitter and a magnetic field induction receiver; wherein the output of the signal transmitter is connected to an end of the cable under testing and sends the testing signal to the cable under testing, so as to generate magnetic filed around the underground cable; the magnetic field induction receiver utilizes the probe to search for the testing signal electromagnetic field emitted from the underground cable and then magnifies and processes the sensed signal, so as to determine direction and depth of the underground cable. The utility model adopts the computer CPU technology and the integrated circuit technology, so that the device has high degree of integration, the search for the underground cable data is accurate and rapid and the operation is convenient and saves labor, expense and time, thereby the device is applicable to locate direction and electric performance of various underground communication cables in countryside and urban area.
Description
Technical field
The utility model relates to a kind of proving installation, particularly a kind of LTU line test unit of seeking cable louding.
Background technology
The method of seeking the underground cable trend at present mainly is to seek by man memory with simple path instrument.So not only time-consuming, and because the physical location of man memory and underground cable tends to because of with the passage of time, mistake appears in personnel's conversion.The probability that the simple path instrument tests out mistake is very big, gives quick and precisely to search and brings obstacle.
Summary of the invention
Inaccurate in order to overcome the searching underground cable that prior art exists, time-consuming many defectives, the utility model provides a kind of a kind of telecommunication cable LTU line test unit that utilizes the electromagnetic field inducing principle fast, accurately to seek and descend definitely cable louding.This measurement device precision height, convenient test, intuitive display can be measured the degree of depth, the trend of underground cable, the situation of underground cables such as insulating property.
The purpose of this utility model is achieved in that a kind of telecommunication cable LTU line test unit, it is characterized in that: it is made up of signal transmitter and magnetic field induction receiver; Wherein the output terminal of signal transmitter connects an end of tested cable 1.
Above-mentioned signal transmitter comprises that low frequency signal part and high-frequency signal partly form; The low frequency signal part is made up of frequency oscillator, frequency divider, low frequency driver and low frequency LC vibration output circuit; The high-frequency signal part is made up of frequency oscillator, high frequency driver and high frequency LC vibration output circuit; Wherein the frequency oscillator output of low frequency signal part is joined with the input of frequency divider; The output of frequency divider links to each other with the input of low frequency driver; The output of low frequency driver links to each other with the input of low frequency LC vibration output circuit; The frequency oscillator output of high-frequency signal part links to each other with the input of high frequency driver; The output of high frequency driver links to each other with the input of high frequency LC vibration output circuit; The LC vibration output circuit of low frequency signal part and high-frequency signal part is connected to output plughole.
Above-mentioned magnetic field induction receiver comprises CPU, probe circuit, signal amplification circuit, bandpass filter, A/D conversion, D/A conversion, audio amplifier circuit, liquid crystal display and loudspeaker earphone; Wherein the output terminal of probe circuit is connected with the input end of signal amplification circuit; The input end of the output terminal connecting band bandpass filter of signal amplification circuit; The output terminal of bandpass filter connects the input end of A/D conversion; The output terminal of A/D conversion is connected to CPU; The output terminal of CPU joins with the input end that audio amplifier circuit, liquid crystal display, D/A change respectively; The output terminal of D/A conversion and the input end of signal amplification circuit join.
The beneficial effects of the utility model are: adopted computer CPU technology and integrated circuit technique, make this install integrated degree height, search the underground cable data accurately, fast, easy for operation, save manpower financial capacity and time, be adapted at the trend and the electric property of searching various underground communication cables in open-air and the city.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is the utility model signal transmitter functional-block diagram.
Fig. 3 is the utility model magnetic field induction receiver principle block scheme.
Fig. 4 is the utility model signal transmitter low frequency driving circuit and low frequency LC vibration output circuit schematic diagram.
Fig. 5 is the utility model signal emitters high frequency drive circuit and high frequency LC vibration output circuit schematic diagram.
Fig. 6 is the utility model magnetic field induction receiver probe circuit schematic diagram.
Fig. 7 is the utility model magnetic field induction receiver signal amplifying circuit schematic diagram.
Fig. 8 is the utility model magnetic field induction receiver bandpass circuit theory diagrams.
Fig. 9 is the utility model magnetic field induction receiver A/D change-over circuit and D/A change-over circuit schematic diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited only to this.
A kind of telecommunication cable LTU line test unit is characterized in that: it is made up of signal transmitter and magnetic field induction receiver; Wherein the output terminal of signal transmitter connects an end of tested cable 1, and the magnetic field induction receiver is surveyed along tested cable 1 bearing of trend.
Referring to Fig. 1, the utility model is made up of signal transmitter and magnetic field induction receiver.The principle of utilization electromagnetic field inducing induces the field signal that test signal produced in the underground cable with the magnetic field induction receiver on the ground.Power according to field signal changes, and determines the accurate position and the trend of underground cable.The output test signal of signal transmitter is connected on an end of tested cable, and in cable conductor output low frequency or high-frequency test signal.Test signal generates an electromagnetic field around underground cable, and is delivered to ground.Ground magnetic field induction receiver is sought the electromagnetic field inducing signal along the test top of cable, probe by the magnetic field induction receiver induces test signal, amplify and processing through signal, demonstrate test status from loudspeaker or liquid crystal display, and then the trend of definite underground cable, buried depth and electric index.
Referring to Fig. 2, above-mentioned signal transmitter comprises low frequency signal part and high-frequency signal part; The low frequency signal part is made up of frequency oscillator, frequency divider, low frequency driver and low frequency LC vibration output circuit; The high-frequency signal part is made up of frequency oscillator, high frequency driver and high frequency LC vibration output circuit; Wherein the frequency oscillator output of low frequency signal part is joined with the input of frequency divider; The output of frequency divider links to each other with the input of low frequency driver; The output of low frequency driver links to each other with the input of low frequency LC vibration output circuit; The frequency oscillator output of high-frequency signal part links to each other with the input of high frequency driver; The output of high frequency driver links to each other with the input of high frequency LC vibration output circuit; The LC vibration output circuit of low frequency signal part and high-frequency signal part is connected to output plughole.In signal transmitter, also have power circuit, frequency switching circuit and electric weight testing circuit to be the common circuit of prior art, in signal transmitter, be conventional annexation with other circuit.
Referring to Fig. 4, above-mentioned low frequency driver is by triode Q3, resistance R 17, and capacitor C 11, C13, C14 form; Be connected the base stage of triode Q3 after the input end capacitor C13 of its medium and low frequency driver and resistance R 17 series connection; The grounded emitter of triode Q3; The collector of triode Q3 connects low frequency LC vibration output circuit; Above-mentioned low frequency LC vibration output circuit is by capacitor C 11, C12, C14, C15, and inductance L 5 is formed; Wherein an end is connected direct supply after capacitor C 12, C15 and the inductance L 5 three's parallel connections, and an end connects the collector of low frequency driver output end triode Q3; An end connects the collector of low frequency driver output end triode Q3 after capacitor C 11, the C14 parallel connection, and the other end is connected to output plughole as low frequency LC vibration output.
Referring to Fig. 1 and Fig. 4, the low frequency signal part becomes low frequency signal by the high-frequency signal of frequency oscillator generation 75KC through frequency divider.Low frequency signal enters the low frequency driver from capacitor C 13, and triode Q3 is a high power valve, is operated on off state, with the powerful amplification of low frequency signal.Through the low frequency signal that amplifies, in the LC resonant tank of triode Q3 collector, produce the enough big low frequency output signal of voltage and deliver to output plughole, be connected to tested cable one end, low frequency signal is transmitted in the underground cable line.
Referring to Fig. 5, above-mentioned high frequency driver is by triode Q1, Q2, and resistance R 13, R14, R16 form; Wherein the base stage of triode Q1 and Q2 is joined; Between the base stage of triode Q1, Q2 and direct supply, be connected to resistance R 13; The emitter of triode Q1, Q2 is connected and connects direct supply through resistance R 16; The collector of triode Q1, Q2 is connected and outputs to high frequency LC vibration output circuit through resistance R 14; Above-mentioned high frequency LC vibrates output circuit by resistance R 15, capacitor C 6, C7, inductance L 2, L4, and controllable impedance L3 forms; Wherein controllable impedance L3, inductance L 4, capacitor C 7 threes connect successively, and an end of capacitor C 7 is connected to output plughole as high frequency LC vibration output circuit; Resistance R 15, capacitor C 6, inductance L 2 three's parallel connections, an end ground connection, the end of the other end and controllable impedance L3 joins, and joins as the input end of high frequency LC vibration output circuit and the output terminal resistance R 14 of high frequency driver.
Referring to Fig. 1 and Fig. 5, the 75KC high-frequency signal that produces from frequency oscillator enters from triode Q1 base stage, behind the compound driver of triode Q1 and triode Q2 composition, high-frequency signal GAO outputs to by capacitor C 8, C7 from the collector of triode Q1, Q2, inductance L 2, L4, the LC composite resonant circuit that controllable impedance L3 forms.High-frequency signal produces the enough big high-frequency resonant signal of voltage at LC composite resonant circuit, and delivers to output plughole, is connected to tested cable one end, and high-frequency signal is transmitted in the underground cable line.
Referring to Fig. 3, above-mentioned magnetic field induction receiver comprises CPU, probe circuit, signal amplification circuit, bandpass filter, A/D conversion, D/A conversion, audio amplifier circuit, liquid crystal display and loudspeaker earphone; Wherein the output terminal of probe circuit is connected with the input end of signal amplification circuit; The input end of the output terminal connecting band bandpass filter of signal amplification circuit; The output terminal of bandpass filter connects the input end of A/D conversion; The output terminal of A/D conversion is connected to CPU; The output terminal of CPU joins with the input end that audio amplifier circuit, liquid crystal display, D/A change respectively; The output terminal of D/A conversion and the input end of signal amplification circuit join.The audio amplifier circuit of magnetic field induction receiver, power circuit, electric weight testing circuit, liquid crystal display circuit etc. are prior art, with other circuit in the magnetic field induction receiver be conventional annexation.
The magnetic field induction receiver mainly is to utilize probe to seek the test signal electromagnetic field that sends from underground cable, and the signal of sensing is amplified, and carries out analog/digital conversion, the analog signal conversion of sensing is become the digital signal of handling for CPU.Through the signal that CPU handles and analyzes, deliver to liquid crystal display, audio frequency amplification respectively, and again digital signal is become simulating signal, feed back to signal amplification circuit and carry out gain control.
The probe circuit of above-mentioned magnetic field induction receiver is by triode Q5, Q4, diode D3, D6, D8, D9, and resistance R 28, R29, R42, tunable capacitor C3, C4, capacitor C 8, C11, coil T2 forms; Wherein 2 ends of coil T2 and 3 ends join and ground connection, and 1 end is connected external circuit with 4 ends; The base stage of resistance R 28 1 termination triode Q5, the other end connects signal amplification circuit; Capacitor C 8, tunable capacitor C3, diode D8 three also are connected between the collector and emitter of triode Q5, and the positive pole of diode D8 connects the collector of triode Q5; 1 end of the emitter wiring circle T2 of triode Q5,2,3 ends of collector wiring circle T2; Diode D3 negative pole connects direct supply, and positive pole connects the emitter of triode Q5; The base stage of resistance R 29 1 termination triode Q4, the other end connects signal amplification circuit; Capacitor C 11, tunable capacitor C4, diode D9, resistance R 42 4 also are connected between the collector and emitter of triode Q4, and the positive pole of diode D9 connects the collector of triode Q4; 4 ends of the emitter wiring circle T2 of triode Q4, grounded collector; Diode D6 negative pole connects direct supply, and positive pole connects the emitter of triode Q4.
Referring to Fig. 6, the probe circuit of magnetic field induction receiver is made up of high-sensitive inductive coil and amplifying circuit.Mainly be that the faint electromagnetic field signal that underground cable medium and low frequency or the high-frequency signal that will sense on ground are produced amplifies, handle for CPU.
The signal amplification circuit of above-mentioned magnetic field induction receiver is by integrated circuit U13, capacitor C 20, C32, C48, C49, and resistance R 31 is formed; Wherein the 1 foot meridian capacitor C48 of integrated circuit U13 and the output terminal of probe circuit join, 2 foot meridian capacitor C49 ground connection, and 3 pin ground connection, 5 foot meridian capacitor C32 are connected to the input end of bandpass filter, are connected on 6 pin after capacitor C 20, resistance R 31 series connection, and 8 pin connect power supply.
The bandpass filter of above-mentioned magnetic field induction receiver is by integrated circuit U3, and capacitor C 16 is formed; 1 pin of integrated circuit U3,3 pin, 5 pin, 6 pin, 8 pin, the continuous ground connection of 13 pin, 7 pin link to each other with 14 pin, and 2 pin connect prime output, and 4 pin connect power supply, 10 pin and 12 pin ground connection, 11 foot meridian capacitor C16 connect back level input end.
The A/D change-over circuit of above-mentioned magnetic field induction receiver and D/A change-over circuit be by integrated circuit U14, operational amplifier U1, operational amplifier U2, resistance R 1～R5, R24, and potentiometer W1, W2, capacitor C 13, C14, C26～C31, C35 form; The output terminal of the 4 pin tape splicing bandpass filters of integrated circuit U14,2 pin of integrated circuit U14 connect 2 pin of operational amplifier U1,3 pin of integrated circuit U14 are connected to 1 pin of integrated circuit U1 through resistance R 5, the 18 foot meridian capacitor C31 of integrated circuit U14 are connected to 1 pin of integrated circuit U2,19 pin of integrated circuit U14 are connected to 7 pin of operational amplifier U2 through resistance R 24,20 pin of integrated circuit U14 connect 6 pin of operational amplifier U2,6 pin of integrated circuit U14 ~ 14 pin connect the corresponding end pin of CPU respectively, 5 pin, 15 pin, 16 pin ground connection, 17 pin connect power supply; 1 of operational amplifier U1, be connected to capacitor C 26 between 2 pin, the end of the 1 pin connecting resistance R3 of operational amplifier U1, the other end of R3 respectively with resistance R 1, capacitor C 27, the end of C28 joins, the other end ground connection of resistance R 1,6 pin of another termination operational amplifier U1 of capacitor C 27, the sliding end of the other end of capacitor C 28 and potentiometer W1 and a stiff end join, be connected to 7 pin of operational amplifier U1, another stiff end of potentiometer W1 also is connected to 6 pin of operational amplifier U1,2 pin of operational amplifier U1 and 2 pin of integrated circuit U14 join, the 3 pin ground connection of operational amplifier U1, be connected to capacitor C 14 between 3 pin of operational amplifier U1 and 4 pin, and 4 pin ground connection, capacitor C 13 is connected between power supply and the ground, the 5 pin ground connection of operational amplifier U1,8 pin connect power supply, 7 pin of operational amplifier U1 through resistance R 4 respectively with resistance R 2, capacitor C 29, the end of C30 joins, the other end ground connection of resistance R 2,1 pin of another termination operational amplifier U2 of capacitor C 29, the other end of capacitor C 30 is connected to 2 pin of operational amplifier U2,1 pin of operational amplifier U2 also joins with a sliding end and the stiff end of potentiometer W2, another stiff end of potentiometer W2 and 2 pin of operational amplifier U2 join, 3 pin of operational amplifier U2,4 pin, 5 pin ground connection, be connected to capacitor C 35 between 6 pin of operational amplifier U2 and 7 pin, the 7 pin output of operational amplifier U2 is connected to the input end of signal amplification circuit.
The model of said integrated circuit U13 is SA602A; The model of said integrated circuit U3 is LTC1164-8; The model of said integrated circuit U14 is AD7528; The model of above-mentioned operational amplifier U1, U2 is MC4558.
Claims (10)
1, a kind of telecommunication cable LTU line test unit is characterized in that: it is made up of signal transmitter and magnetic field induction receiver, and wherein the output terminal of signal transmitter connects an end of tested cable (1).
2, telecommunication cable LTU line test unit according to claim 1 is characterized in that: described signal transmitter comprises low frequency signal part and high-frequency signal part; Wherein the low frequency signal part is made up of frequency oscillator, frequency divider, low frequency driver and low frequency LC vibration output circuit; The high-frequency signal part is made up of frequency oscillator, high frequency driver and high frequency LC vibration output circuit; The frequency oscillator output and the input of frequency divider of low frequency signal part are joined; The output of frequency divider links to each other with the input of low frequency driver; The output of low frequency driver links to each other with the input of low frequency LC vibration output circuit; The frequency oscillator output of high-frequency signal part links to each other with the input of high frequency driver; The output of high frequency driver links to each other with the input of high frequency LC vibration output circuit; The LC vibration output circuit of low frequency signal part and high-frequency signal part is connected to output plughole.
3, telecommunication cable LTU line test unit according to claim 1 is characterized in that: described magnetic field induction receiver comprises CPU, probe circuit, signal amplification circuit, bandpass filter, A/D conversion, D/A conversion, audio amplifier circuit, liquid crystal display and loudspeaker earphone; Wherein the output terminal of probe circuit is connected with the input end of signal amplification circuit; The input end of the output terminal connecting band bandpass filter of signal amplification circuit; The output terminal of bandpass filter connects the input end of A/D conversion; The output terminal of A/D conversion is connected to CPU; The output terminal of CPU joins with the input end that audio amplifier circuit, liquid crystal display, D/A change respectively; The output terminal of D/A conversion and the input end of signal amplification circuit join.
4, telecommunication cable LTU line test unit according to claim 2 is characterized in that: described low frequency driver is by triode Q3, resistance R 17, and capacitor C 11, C13, C14 form; Be connected the base stage of triode Q3 after the input end capacitor C13 of its medium and low frequency driver and resistance R 17 series connection; The grounded emitter of triode Q3; The collector of triode Q3 connects low frequency LC vibration output circuit; Described low frequency LC vibration output circuit is by capacitor C 11, C12, C14, C15, and inductance L 5 is formed; Wherein an end is connected direct supply after capacitor C 12, C15 and the inductance L 5 three's parallel connections, and an end connects the collector of low frequency driver output end triode Q3; An end connects the collector of low frequency driver output end triode Q3 after capacitor C 11, the C14 parallel connection, and the other end is connected to output plughole as low frequency LC vibration output.
5, telecommunication cable LTU line test unit according to claim 2 is characterized in that: described high frequency driver is by triode Q1, Q2, and resistance R 13, R14, R16 form; Wherein the base stage of triode Q1 and Q2 is joined; Between the base stage of triode Q1, Q2 and direct supply, be connected to resistance R 13; The emitter of triode Q1, Q2 is connected and connects direct supply through resistance R 16; The collector of triode Q1, Q2 is connected and outputs to high frequency LC vibration output circuit through resistance R 14; Described high frequency LC vibrates output circuit by resistance R 15, capacitor C 6, C7, inductance L 2, L4, and controllable impedance L3 forms; Wherein controllable impedance L3, inductance L 4, capacitor C 7 threes connect successively, and an end of capacitor C 7 is connected to output plughole as high frequency LC vibration output circuit; Resistance R 15, capacitor C 6, inductance L 2 three's parallel connections, an end ground connection, the end of the other end and controllable impedance L3 joins, and joins as the input end of high frequency LC vibration output circuit and the output terminal resistance R 14 of high frequency driver.
6, telecommunication cable LTU line test unit according to claim 3 is characterized in that: described probe circuit is by triode Q5, Q4, diode D3, D6, D8, D9, resistance R 28, R29, R42, tunable capacitor C3, C4, capacitor C 8, C11, coil T2 forms; Wherein 2 ends of coil T2 and 3 ends join and ground connection, and 1 end is connected external circuit with 4 ends; The base stage of resistance R 28 1 termination triode Q5, the other end connects signal amplification circuit; Capacitor C 8, tunable capacitor C3, diode D8 three also are connected between the collector and emitter of triode Q5, and the positive pole of diode D8 connects the collector of triode Q5; 1 end of the emitter wiring circle T2 of triode Q5,2,3 ends of collector wiring circle T2; Diode D3 negative pole connects direct supply, and positive pole connects the emitter of triode Q5; The base stage of resistance R 29 1 termination triode Q4, the other end connects signal amplification circuit; Capacitor C 11, tunable capacitor C4, diode D9, resistance R 42 4 also are connected between the collector and emitter of triode Q4, and the positive pole of diode D9 connects the collector of triode Q4; 4 ends of the emitter wiring circle T2 of triode Q4, grounded collector; Diode D6 negative pole connects direct supply, and positive pole connects the emitter of triode Q4.
7, telecommunication cable LTU line test unit according to claim 3 is characterized in that: described signal amplification circuit is by integrated circuit U13, capacitor C 20, C32, C48, C49, and resistance R 31 is formed; Wherein the 1 foot meridian capacitor C48 of integrated circuit U13 and the output terminal of probe circuit join, 2 foot meridian capacitor C49 ground connection, and 3 pin ground connection, 5 foot meridian capacitor C32 are connected to the input end of bandpass filter, are connected on 6 pin after capacitor C 20, resistance R 31 series connection, and 8 pin connect power supply.
8, telecommunication cable LTU line test unit according to claim 3 is characterized in that: described bandpass filter is by integrated circuit U3, and capacitor C 16 is formed; 1 pin of integrated circuit U3,3 pin, 5 pin, 6 pin, 8 pin, the continuous ground connection of 13 pin, 7 pin link to each other with 14 pin, and 2 pin connect prime output, and 4 pin connect power supply, 10 pin and 12 pin ground connection, 11 foot meridian capacitor C16 connect back level input end.
9, telecommunication cable LTU line test unit according to claim 3, it is characterized in that: described A/D change-over circuit and D/A change-over circuit are by integrated circuit U14, operational amplifier U1, operational amplifier U2, resistance R 1～R5, R24, potentiometer W1, W2, capacitor C 13, C14, C26～C31, C35 form; The output terminal of the 4 pin tape splicing bandpass filters of integrated circuit U14,2 pin of integrated circuit U14 connect 2 pin of operational amplifier U1,3 pin of integrated circuit U14 are connected to 1 pin of integrated circuit U1 through resistance R 5, the 18 foot meridian capacitor C31 of integrated circuit U14 are connected to 1 pin of integrated circuit U2,19 pin of integrated circuit U14 are connected to 7 pin of operational amplifier U2 through resistance R 24,20 pin of integrated circuit U14 connect 6 pin of operational amplifier U2,6 pin of integrated circuit U14 ~ 14 pin connect the corresponding end pin of CPU respectively, 5 pin, 15 pin, 16 pin ground connection, 17 pin connect power supply; 1 of operational amplifier U1, be connected to capacitor C 26 between 2 pin, the end of the 1 pin connecting resistance R3 of operational amplifier U1, the other end of R3 respectively with resistance R 1, capacitor C 27, the end of C28 joins, the other end ground connection of resistance R 1,6 pin of another termination operational amplifier U1 of capacitor C 27, the sliding end of the other end of capacitor C 28 and potentiometer W1 and a stiff end join, be connected to 7 pin of operational amplifier U1, another stiff end of potentiometer W1 also is connected to 6 pin of operational amplifier U1,2 pin of operational amplifier U1 and 2 pin of integrated circuit U14 join, the 3 pin ground connection of operational amplifier U1, be connected to capacitor C 14 between 3 pin of operational amplifier U1 and 4 pin, and 4 pin ground connection, capacitor C 13 is connected between power supply and the ground, the 5 pin ground connection of operational amplifier U1,8 pin connect power supply, 7 pin of operational amplifier U1 through resistance R 4 respectively with resistance R 2, capacitor C 29, the end of C30 joins, the other end ground connection of resistance R 2,1 pin of another termination operational amplifier U2 of capacitor C 29, the other end of capacitor C 30 is connected to 2 pin of operational amplifier U2,1 pin of operational amplifier U2 also joins with a sliding end and the stiff end of potentiometer W2, another stiff end of potentiometer W2 and 2 pin of operational amplifier U2 join, 3 pin of operational amplifier U2,4 pin, 5 pin ground connection, be connected to capacitor C 35 between 6 pin of operational amplifier U2 and 7 pin, the 7 pin output of operational amplifier U2 is connected to the input end of signal amplification circuit.
10, according to claim 7,8 or 9 described telecommunication cable LTU line test units, it is characterized in that: the model of described integrated circuit U13 is SA602A; The model of described integrated circuit U3 is LTC1164-8; The model of described integrated circuit U14 is AD7528; The model of described operational amplifier U1, U2 is MC4558.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620110458 CN2896306Y (en) | 2006-04-28 | 2006-04-28 | Communication cable circuit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620110458 CN2896306Y (en) | 2006-04-28 | 2006-04-28 | Communication cable circuit detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2896306Y true CN2896306Y (en) | 2007-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620110458 Expired - Lifetime CN2896306Y (en) | 2006-04-28 | 2006-04-28 | Communication cable circuit detection device |
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| CN (1) | CN2896306Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881799A (en) * | 2010-06-23 | 2010-11-10 | 河南送变电建设公司 | Grounding net distribution detector |
| CN103163561A (en) * | 2013-03-25 | 2013-06-19 | 上海铁新地理信息有限公司 | Cable path electriferous probing method and device |
| CN103487556A (en) * | 2013-10-07 | 2014-01-01 | 复旦大学 | Superconducting phase microscopy system |
| CN106154312A (en) * | 2016-08-26 | 2016-11-23 | 国家电网公司 | Not clear line alignment tester |
| CN108387816A (en) * | 2018-01-22 | 2018-08-10 | 吉林吉大通信设计院股份有限公司 | A kind of buried feeder line and buried cable Magnetic oriented monitor and alarm system |
| CN110161570A (en) * | 2019-06-11 | 2019-08-23 | 武汉三相电力科技有限公司 | Cable run path detection method |
-
2006
- 2006-04-28 CN CN 200620110458 patent/CN2896306Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881799A (en) * | 2010-06-23 | 2010-11-10 | 河南送变电建设公司 | Grounding net distribution detector |
| CN101881799B (en) * | 2010-06-23 | 2012-09-05 | 河南送变电建设公司 | Grounding net distribution detector |
| CN103163561A (en) * | 2013-03-25 | 2013-06-19 | 上海铁新地理信息有限公司 | Cable path electriferous probing method and device |
| CN103487556A (en) * | 2013-10-07 | 2014-01-01 | 复旦大学 | Superconducting phase microscopy system |
| CN103487556B (en) * | 2013-10-07 | 2015-10-28 | 复旦大学 | A kind of superconducting phase microscopic system |
| CN106154312A (en) * | 2016-08-26 | 2016-11-23 | 国家电网公司 | Not clear line alignment tester |
| CN108387816A (en) * | 2018-01-22 | 2018-08-10 | 吉林吉大通信设计院股份有限公司 | A kind of buried feeder line and buried cable Magnetic oriented monitor and alarm system |
| CN108387816B (en) * | 2018-01-22 | 2020-09-29 | 吉林吉大通信设计院股份有限公司 | Buried feeder line and buried cable magnetic field positioning monitoring alarm system |
| CN110161570A (en) * | 2019-06-11 | 2019-08-23 | 武汉三相电力科技有限公司 | Cable run path detection method |
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