CN107976599A - DC suppling equipment line inspection instrument - Google Patents
DC suppling equipment line inspection instrument Download PDFInfo
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- CN107976599A CN107976599A CN201711437930.3A CN201711437930A CN107976599A CN 107976599 A CN107976599 A CN 107976599A CN 201711437930 A CN201711437930 A CN 201711437930A CN 107976599 A CN107976599 A CN 107976599A
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- 238000007689 inspection Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 230000000087 stabilizing effect Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The invention discloses a kind of DC suppling equipment line inspection instrument, including separately positioned end examination electric equipment and front end signal processing equipment；The end examination electric equipment includes polarity detection circuit and signal generating circuit, the polarity detection circuit and signal generating circuit are electrically connected with the feeder ear of test line, the front end signal processing equipment includes signal acquisition circuit, signal processing circuit and the display screen being sequentially electrically connected, and the signal acquisition circuit is also electrically connected with test line.In the present invention, electric equipment is tried by end and couples synchronizing signal to the feeder ear of test line, then synchronizing signal is detected using other positions of the front end signal processing equipment in test line, so as to judge at 2 points whether on same circuit, improves the accuracy of cable hunting.
Description
Technical field
The present invention relates to line inspection instrument equipment technical field, more particularly to a kind of DC suppling equipment line inspection instrument.
Background technology
At present, the equipment of communication base station Zhong Duojia equipment operator and power circuit mix, and are used to measure in installation
During the branch measuring equipment of the equipment power consumption of each equipment operator, a very important job is exactly to each equipment operator
The supply line of equipment cleared up.In actual installation branch measuring equipment, operating personnel are generally fed back in the presence of scene electricity
Source wiring is chaotic, is not easy to recognize, the problems such as harness is uncertain, thus causes the problems such as equipment installation speed is slow, error rate is high.Mesh
The current value of power output end and the current value of transmitting equipment end are tested in preceding equipment harness hunting using clamp on amperemeter, if two
The current value of person is identical, is taken as the same line；But scene is a large amount of there are the identical and close circuit of current value, meanwhile,
Current value error is measured more than 2% using clamp on amperemeter, therefore situation about judging by accident often occurs.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of DC suppling equipment line inspection instrument, pass through end
End examination electric equipment couples synchronizing signal in the feeder ear of test line, and front end signal processing equipment is examined in test line other positions
Synchronizing signal is surveyed, so as to fulfill cable hunting, improves the accuracy rate of hunting.
The purpose of the present invention is what is be achieved through the following technical solutions：DC suppling equipment line inspection instrument, including separation are set
The end examination electric equipment and front end signal processing equipment put；The end examination electric equipment includes polarity detection circuit and signal produces
Circuit, the polarity detection circuit and signal generating circuit are electrically connected with the feeder ear of test line, at the front end signal
Reason equipment includes the signal acquisition circuit, signal processing circuit and the display screen that are sequentially electrically connected, the signal acquisition circuit also with
Test line is electrically connected.
Preferably, the front end signal processing equipment block further includes：Power supply, the power supply are adopted with signal respectively
Collector, signal processing circuit and display screen are electrically connected.
Preferably, the signal acquisition circuit includes sensor and analog to digital conversion circuit, the sensor respectively with modulus
Conversion circuit and test line are electrically connected, and analog-digital conversion circuit as described is also electrically connected with signal processing circuit.
Preferably, the signal acquisition circuit further includes Anti-aliasing Filter Circuits, and the Anti-aliasing Filter Circuits are arranged on
Between analog to digital conversion circuit and signal processing circuit, the Anti-aliasing Filter Circuits respectively with analog to digital conversion circuit and signal processing
Circuit is electrically connected.
Preferably, the sensor is voltage sensor or current sensor.
Preferably, the end examination electric equipment further includes reverse-connection preventing circuit, and the input terminal of the reverse-connection preventing circuit passes through electricity
Source interface is electrically connected with the output terminal of external dc power, the output terminal of the reverse-connection preventing circuit respectively with polarity detection circuit and
The power end of signal generating circuit is electrically connected.
Preferably, the reverse-connection preventing circuit includes bridge rectifier, current-limiting circuit and regulator circuit, the bridge rectifier
The first input end of circuit and the power supply positive input terminal of power interface connect, the second input terminal and the electricity of the bridge rectifier
The power supply negative input end connection of source interface, the negative output terminal ground connection of the bridge rectifier, the bridge rectifier is just
Power end of the output terminal respectively with current-limiting circuit, signal generating circuit and/or polarity detection circuit is connected, the current-limiting circuit
The input terminal of output terminal and regulator circuit connects, and the regulator circuit is also electric with signal generating circuit and/or polarity detection circuit
Connection.
The beneficial effects of the invention are as follows：
（1）The present invention tries electric equipment by end and couples synchronizing signal to the feeder ear of test line, then utilizes front end signal
Processing equipment detects synchronizing signal in the other positions of test line, so as to whether be connected between judging at 2 points, i.e., 2 points whether
On same circuit, the accuracy of cable hunting is improved；
（2）Polarity detection circuit is equipped with end examination electric equipment, for detecting the positive-negative polarity of test line feeder ear, so that into
One step improves the accuracy of cable hunting；
（3）The second circuit board of end examination electric equipment is equipped with reverse-connection preventing circuit, and electric equipment is tried in end from In situ DC power supply
Harm caused by reversal connection can be avoided when obtaining electric energy；
（4）Reverse-connection preventing circuit solves the problems, such as reversal connection using bridge rectifier, and whether electric equipment is tried in reversal connection end in any case
It can work normally.
Brief description of the drawings
Fig. 1 is the schematic block diagram of the present invention；
Fig. 2 is the circuit block diagram of signal acquisition circuit in the present invention；
Fig. 3 is the circuit block diagram of reverse-connection preventing circuit in the present invention；
Fig. 4 is a kind of circuit diagram of reverse-connection preventing circuit in the present invention.
Embodiment
Below in conjunction with embodiment, technical scheme is clearly and completely described, it is clear that described
Embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this area
Technical staff's all other embodiments obtained on the premise of not making the creative labor, belong to what the present invention protected
Scope.
Refering to Fig. 1-4, a kind of DC suppling equipment line inspection instrument is present embodiments provided：
As shown in Figure 1, DC suppling equipment line inspection instrument includes separately positioned end examination electric equipment and front end signal processing equipment；
The end examination electric equipment includes polarity detection circuit and signal generating circuit, the polarity detection circuit and signal generating circuit
Signal end be electrically connected by signaling interface with the feeder ear of test line, the polarity detection circuit and signal generating circuit
Power end be electrically connected with the output terminal of external dc power, the front end signal processing equipment includes the letter that is sequentially electrically connected
Number Acquisition Circuit, signal processing circuit and display screen, the signal acquisition circuit are also electrically connected with test line.
The front end signal processing equipment block further includes power supply, the power supply respectively with signal acquisition circuit,
Signal processing circuit and display screen are electrically connected, and power supply is used to supply for signal acquisition circuit, signal processing circuit and display screen
Electricity, power supply can use lithium battery etc..
The signal acquisition circuit includes sensor and analog to digital conversion circuit, the sensor respectively with analog to digital conversion circuit
It is electrically connected with test line, analog-digital conversion circuit as described is also electrically connected with signal processing circuit.Sensor is used for from test line
Middle capture synchronizing signal, analog to digital conversion circuit are used to carry out analog-to-digital conversion to synchronizing signal.Preferably, the sensor is voltage
Sensor or current sensor.
Preferably, the signal acquisition circuit further includes Anti-aliasing Filter Circuits, and the Anti-aliasing Filter Circuits are arranged on
Between analog to digital conversion circuit and signal processing circuit, the Anti-aliasing Filter Circuits respectively with analog to digital conversion circuit and signal processing
Circuit is electrically connected.Anti-aliasing Filter Circuits filter out interference, it is possible to increase the accuracy of subsequent detection.
The course of work is：End examination electric equipment is electrically connected with the feeder ear of test line, passes through polarity detection circuit pair
The positive-negative polarity of feeder ear is detected, and to aid in hunting, generates synchronizing signal by signal generating circuit, and this is synchronously believed
Number be coupled to test line in；Then, by front end signal processing equipment and the other positions of test line（Test point）It is electrically connected,
Synchronizing signal in signal acquisition circuit capture test line, then carries out synchronizing signal in the processing such as analog-to-digital conversion, filtering, letter
The energy value for the synchronizing signal that the detection of number process circuit captures, signal display are used for the energy value of display synchronization signal, behaviour
Make personnel and can determine whether that test point and feeder ear whether on same circuit, so as to fulfill cable hunting, carry according to the energy value
The high accuracy of hunting.
It should be noted that positive-negative polarity detection can have been carried out in the prior art, signal produces and signal energy value
The circuit of detection, polarity detection circuit, signal generating circuit and signal processing circuit in the present embodiment etc. can use existing
Some interlock circuits；On the basis of the information such as the effect of composition structure disclosed by the invention and each several part are combined, this area skill
Art can realize parts selection and wiring of these circuits etc. without involving an inventive effort；Therefore, the present embodiment is no longer right
The concrete structure of polarity detection circuit, signal generating circuit and signal processing circuit etc. repeats one by one.
Preferably, the end examination electric equipment further includes reverse-connection preventing circuit, and the input terminal of the reverse-connection preventing circuit passes through electricity
Source interface is electrically connected with the output terminal of external dc power, the output terminal of the reverse-connection preventing circuit respectively with polarity detection circuit and
The power end of signal generating circuit is electrically connected.
Preferably, as shown in figure 3, the reverse-connection preventing circuit includes bridge rectifier, current-limiting circuit and regulator circuit, institute
The power supply positive input terminal of the first input end and power interface of stating bridge rectifier connects, and the second of the bridge rectifier
The power supply negative input end of input terminal and power interface connects, the negative output terminal ground connection of the bridge rectifier, and the bridge-type is whole
Power end of the positive output end of current circuit respectively with current-limiting circuit, signal generating circuit and/or polarity detection circuit is connected, described
The input terminal of the output terminal of current-limiting circuit and regulator circuit connects, the regulator circuit also with signal generating circuit and/or polarity
Detection circuit is electrically connected.
Reversal connection is solved the problems, such as by bridge rectifier in this implementation so that electric equipment 20 is tried in end when reversal connection
Remain to work normally；In addition, end is avoided to try to be unlikely to short when 20 internal circuit of electric equipment fails by setting current-limiting circuit
Road has an impact base station.
Preferably, the regulator circuit includes first order regulator circuit and second level regulator circuit, the second level voltage stabilizing
The input terminal of circuit is connected through first order regulator circuit and the output terminal of current-limiting circuit, and the first order regulator circuit is produced with signal
Raw circuit and/or polarity detection circuit are electrically connected, the second level regulator circuit and signal generating circuit and/or Check up polarity electricity
Road is electrically connected.The reverse-connection preventing circuit further includes first state indicating circuit and the second condition indication circuit, the first state
Indicating circuit is connected with current-limiting circuit, second condition indication circuit power supply positive input terminal and power supply with power interface respectively
Negative input end connects.
As shown in figure 4, the bridge rectifier includes the first diode D1, the second diode D2, the 3rd diode D3
With the 4th diode D4, the cathode docking of the cathode and the second diode D2 of the first diode D1 forms bridge rectifier
Positive output end, the 3rd diode D3 and the 4th diode D4 anode docking form bridge rectifier negative output
End, the cathode of the 3rd diode D3 and the anode of the first diode D1 connect and compose the first input of bridge rectifier
End, the cathode of the 4th diode D4 and the anode of the second diode D2 connect and compose the second input of bridge rectifier
End.Preferably, the input power of the end examination electric equipment 20 is 48V DC power supplies.
Second condition indication circuit includes the 8th diode D8, the 9th diode D9, the tenth diode D10, the tenth
One diode D11, the 12nd resistance R12 and the 13rd resistance R13, the 8th diode D8 and the tenth diode D10 are
Light emitting diode, the cathode of the 8th diode D8 are connected through the power supply positive input terminal of the 12nd resistance R12 and power interface,
The power supply negative input end of the anode of the 8th diode D8 and power interface connects, the anode of the 9th diode D9 and the
The power supply positive input terminal connection of the cathode power interface of eight diode D8, the cathode and the 8th diode of the 9th diode D9
The power supply negative input end connection of the anode supply interface of D8, the anode of the tenth diode D10 and the power supply of power interface are just
Input terminal connects, and the cathode of the tenth diode D10 connects through the power supply negative input end of the 13rd resistance R13 and power interface
Connecing, the cathode of the 11st diode D11 is connected with the power supply positive input terminal of the anode supply interface of the tenth diode D10,
The anode of the 11st diode D11 is connected with the power supply negative input end of the cathode power interface of the tenth diode D10.End
When examination electric equipment 20 just connects, the tenth diode D10 shines, and the 8th diode D8 extinguishes；When 20 reversal connection of electric equipment is tried in end, the 8th
Diode D8 shines, and the tenth diode D10 extinguishes；So as to easily understand end examination electric equipment 20 whether reversal connection.
The current-limiting circuit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the one or three pole
Pipe Q1 and silicon-controlled Q2, the 4th resistance R4 are adjustable resistance, and the emitter of the first triode Q1 is through first resistor R1
It is connected with the positive output end of bridge rectifier, the emitter of the first triode Q1 passes through second resistance R2 and the 3rd successively
Base stage after resistance R3 with the first triode Q is connected, and the collector of the first triode Q1 is grounded through the 4th resistance R4, described
The anode of silicon-controlled Q2 is connected with the common point of second resistance R2 and 3rd resistor R3, the minus earth of the silicon-controlled Q2, institute
The grid for stating silicon-controlled Q2 is connected with the adjustable side of the 4th resistance R4.Preferably, the first triode Q1 is three pole of positive-negative-positive
Pipe.
The first state indicating circuit includes the 7th diode D7 and the 11st resistance R11, the 7th diode D7
For light emitting diode, the anode of the 7th diode D7 is connected with the common point of second resistance R2 and 3rd resistor R3, described
The cathode of 7th diode D7 is connected through the 11st resistance R11 with the anode of silicon-controlled Q2.
First regulator circuit include the second triode T1, the 5th resistance R5, the 6th resistance R6, the 5th diode D5,
6th diode D6 and the first capacitance C1, the 6th diode D6 are zener diode, the base stage of the second triode T1
It is grounded through the first capacitance C1, the emitter of the second triode T1 connects signal generating circuit and/or polarity detection circuit, described
The collector of second triode T1 is connected through the 5th resistance R5 with the base stage of the second triode T1, the 6th resistance R6 and the 5th
Resistance R5 is in parallel, and the collector of the second triode T1 is connected with the common point of second resistance R2 and 3rd resistor R3, and the 5th
The anode of diode D5 is connected with the base stage of the second triode T1, and the cathode of the 5th diode D5 connects with the anode of silicon-controlled Q2
Connect.Preferably, the model BD237 of the second triode T1.
Second regulator circuit includes voltage stabilizing chip U1, the second capacitance C2, the 3rd capacitance C3, the 4th capacitance C4, the 5th
Capacitance C5, the 6th capacitance C6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10 and inductance L, described
The cathode of two capacitance C2 connects signal generating circuit and/or polarity detection circuit, the anode ground connection of the second capacitance C2, and described the
Three capacitance C3 are in parallel with the second capacitance C2, the Enable Pin of the voltage stabilizing chip U1 through the 7th resistance R7 connect signal generating circuit and/
Or polarity detection circuit, the compensating end of the voltage stabilizing chip U1 are grounded after the 8th resistance R8 and the 4th capacitance C4 successively, institute
The simulation ground terminal and protection ground terminal for stating voltage stabilizing chip U1 are grounded, and the output terminal of the voltage stabilizing chip U1 connects signal production through inductance L
Raw circuit and/or polarity detection circuit, the cathode of the 5th capacitance C5 connect signal generating circuit and/or polarity detection circuit,
The anode ground connection of the 5th capacitance C5, the 6th capacitance C6 is in parallel with the 5th capacitance C5, one end of the 9th resistance R9
Signal generating circuit and/or polarity detection circuit are connect, the other end of the 9th resistance R9 is grounded through the tenth resistance R10, described
The feedback end of voltage stabilizing chip U1 is connected with the common point of the 9th resistance R9 and the tenth resistance R10.Preferably, the voltage stabilizing chip U1
Model AOZ1016.
The operation principle of the present embodiment is：When initial, the first triode Q1 and silicon-controlled Q2 are turned off, at first resistor R1
When voltage raises, the first triode Q1 conductings, then so that silicon-controlled Q2 is turned on, so as to play the role of current-limiting protection.
The above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form, is not to be taken as the exclusion to other embodiment, and can be used for various other combinations, modification and environment, and can be at this
In the text contemplated scope, it is modified by the technology or knowledge of above-mentioned teaching or association area.And those skilled in the art institute into
Capable modifications and changes do not depart from the spirit and scope of the present invention, then all should be in the protection domain of appended claims of the present invention
It is interior.
Claims (7)
1. DC suppling equipment line inspection instrument, it is characterised in that including separately positioned end examination electric equipment and front end signal processing
Equipment；The end examination electric equipment includes polarity detection circuit and signal generating circuit, polarity detection circuit and the signal production
Raw circuit is electrically connected with the feeder ear of test line, and the front end signal processing equipment includes the signal acquisition being sequentially electrically connected
Circuit, signal processing circuit and display screen, the signal acquisition circuit are also electrically connected with test line.
2. DC suppling equipment line inspection instrument according to claim 1, it is characterised in that the front end signal processing equipment block
Further include：Power supply, the power supply are electrically connected with signal acquisition circuit, signal processing circuit and display screen respectively.
3. DC suppling equipment line inspection instrument according to claim 1, it is characterised in that the signal acquisition circuit includes passing
Sensor and analog to digital conversion circuit, the sensor are electrically connected with analog to digital conversion circuit and test line respectively, the analog-to-digital conversion
Circuit is also electrically connected with signal processing circuit.
4. DC suppling equipment line inspection instrument according to claim 3, it is characterised in that the signal acquisition circuit further includes
Anti-aliasing Filter Circuits, the Anti-aliasing Filter Circuits are arranged between analog to digital conversion circuit and signal processing circuit, described anti-
Aliasing filter circuit is electrically connected with analog to digital conversion circuit and signal processing circuit respectively.
5. DC suppling equipment line inspection instrument according to claim 3, it is characterised in that the sensor is voltage sensor
Or current sensor.
6. DC suppling equipment line inspection instrument according to claim 1, it is characterised in that the end examination electric equipment further includes
Reverse-connection preventing circuit, the input terminal of the reverse-connection preventing circuit are electrically connected by power interface with the output terminal of external dc power, institute
Power end of the output terminal of reverse-connection preventing circuit respectively with polarity detection circuit and signal generating circuit is stated to be electrically connected.
7. DC suppling equipment line inspection instrument according to claim 1, it is characterised in that the reverse-connection preventing circuit includes bridge-type
Rectification circuit, current-limiting circuit and regulator circuit, the first input end of the bridge rectifier and the power supply of power interface are just defeated
Enter end connection, the second input terminal of the bridge rectifier and the power supply negative input end of power interface connect, and the bridge-type is whole
The negative output terminal ground connection of current circuit, the positive output end of the bridge rectifier respectively with current-limiting circuit, signal generating circuit and/
It is described steady or the power end connection of polarity detection circuit, the output terminal of the current-limiting circuit and the input terminal of regulator circuit connect
Volt circuit is also electrically connected with signal generating circuit and/or polarity detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711437930.3A CN107976599A (en) | 2017-12-26 | 2017-12-26 | DC suppling equipment line inspection instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711437930.3A CN107976599A (en) | 2017-12-26 | 2017-12-26 | DC suppling equipment line inspection instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107976599A true CN107976599A (en) | 2018-05-01 |
Family
ID=62007867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711437930.3A Pending CN107976599A (en) | 2017-12-26 | 2017-12-26 | DC suppling equipment line inspection instrument |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455399A (en) * | 2010-10-18 | 2012-05-16 | 黄洪全 | Tracking and locating device for earth fault of overhead line |
| CN102590709A (en) * | 2012-02-27 | 2012-07-18 | 江苏省电力公司扬州供电公司 | Low-voltage line electric leakage detecting device |
| CN105334429A (en) * | 2015-11-30 | 2016-02-17 | 国家电网公司 | Power distribution network circuit fault detecting method |
| CN105354962A (en) * | 2015-10-30 | 2016-02-24 | 长沙星联电力自动化技术有限公司 | Self-adaptive cable antitheft device and method |
| CN205229429U (en) * | 2015-12-10 | 2016-05-11 | 国网四川省电力公司电力科学研究院 | DC power supply preliminary examination ware |
| CN106443358A (en) * | 2016-11-08 | 2017-02-22 | 三峡大学 | Aerial power distribution network traveling-wave positioning system based on signal injection device |
| CN207662985U (en) * | 2017-12-26 | 2018-07-27 | 四川永胜航空电源有限公司 | DC suppling equipment line inspection instrument |
-
2017
- 2017-12-26 CN CN201711437930.3A patent/CN107976599A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455399A (en) * | 2010-10-18 | 2012-05-16 | 黄洪全 | Tracking and locating device for earth fault of overhead line |
| CN102590709A (en) * | 2012-02-27 | 2012-07-18 | 江苏省电力公司扬州供电公司 | Low-voltage line electric leakage detecting device |
| CN105354962A (en) * | 2015-10-30 | 2016-02-24 | 长沙星联电力自动化技术有限公司 | Self-adaptive cable antitheft device and method |
| CN105334429A (en) * | 2015-11-30 | 2016-02-17 | 国家电网公司 | Power distribution network circuit fault detecting method |
| CN205229429U (en) * | 2015-12-10 | 2016-05-11 | 国网四川省电力公司电力科学研究院 | DC power supply preliminary examination ware |
| CN106443358A (en) * | 2016-11-08 | 2017-02-22 | 三峡大学 | Aerial power distribution network traveling-wave positioning system based on signal injection device |
| CN207662985U (en) * | 2017-12-26 | 2018-07-27 | 四川永胜航空电源有限公司 | DC suppling equipment line inspection instrument |
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Effective date of registration: 20200306 Address after: 526000 Decheng industrial intensive base, Deqing County, Zhaoqing City, Guangdong Province Applicant after: Guangdong Deqing Electric Meter Manufacturing Co., Ltd. Address before: 610000 Sichuan Chengdu Pixian Chengdu modern industrial port north area Hong Kong Tong North 3 Road No. 523 Applicant before: Sichuan Yongsheng aeronautical power supply Co., Ltd. |