CN107817429B - Bow net fault monitoring device - Google Patents
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- CN107817429B CN107817429B CN201711237288.4A CN201711237288A CN107817429B CN 107817429 B CN107817429 B CN 107817429B CN 201711237288 A CN201711237288 A CN 201711237288A CN 107817429 B CN107817429 B CN 107817429B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 claims abstract description 26
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 90
- 239000003381 stabilizer Substances 0.000 claims description 30
- 238000007599 discharging Methods 0.000 claims description 8
- 238000010891 electric arc Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 238000004364 calculation method Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a bow net fault monitoring device which comprises a bow net arc-pulling and electric energy obtaining sensor connected to a pantograph arm rod or a current lead in a penetrating way; two ends of the pantograph a plurality of vibration impact compound sensors; a preset number of net wires which are arranged on the pantograph supporting plate at intervals pass through the sensor; and the pre-processor is connected with the arc drawing and electric energy acquisition sensor of the bow net, the vibration impact composite sensor and the net wire passing sensor respectively, and is used for acquiring signals extracted by the sensors and processing information. The invention adopts a mode of monitoring the sensor signals, has low cost, easy maintenance and strong anti-interference capability, has small data volume and high calculation efficiency when the fault analysis is carried out subsequently, and simultaneously monitors more various fault types.
Description
Technical Field
The invention relates to the technical field of safety monitoring, in particular to an arch network fault monitoring device.
Background
Electric vehicles with a large amount of sampling in rail transit use pantographs to power an overhead special power grid. Most railway vehicles use 25000V alternating current high-voltage power grid, and urban railway traffic vehicles are usually powered by 1500V or 750V direct current power grid (three-phase rectification and with pulsation component). In the process of taking electric energy by contacting the pantograph of the roof with the power grid, a hard point is frequently caused by the fact that the pantograph is worn with the power grid for a long time, and the phenomenon of instantaneous disconnection and separation and arcing are caused by jumping when the pantograph moves relative to the power grid distributed in a zigzag manner in driving, so that the power grid wires and the pantograph are burnt, and accidents are finally caused.
The existing bow net fault detection basically adopts an image method, but the image detection has complex equipment installation, a series of multiple cameras installed at different types, different angles and different positions are often needed, the system is complex and difficult to maintain, the data size of later image recognition is large, the calculation efficiency is low, the interference resistance is poor, and meanwhile, the fault detection cannot be used for the crack type faults on the pantograph.
Therefore, how to design a simple and reliable bow net fault monitoring device, is a technical problem that needs to be solved by the person skilled in the art at present.
Disclosure of Invention
The invention aims to provide an arch network fault monitoring device which adopts a sensor signal monitoring mode, has low cost, easy maintenance and strong anti-interference capability, has small data size and high calculation efficiency when fault analysis is carried out subsequently, and simultaneously monitors more various fault types.
In order to solve the technical problems, the present invention provides an arch network fault monitoring device, including:
the bow net arc-pulling and electric energy obtaining sensor is connected to the pantograph arm rod or the current lead in a penetrating way;
two vibration impact compound sensors mounted at two ends of the pantograph;
a preset number of net wires which are arranged on the pantograph supporting plate at intervals pass through the sensor;
and the preprocessor is connected with the arc drawing and electric energy acquisition sensor of the bow net, the vibration impact composite sensor and the net wire through the sensors respectively, and is used for acquiring signals extracted by the sensors and processing information.
Preferably, the preprocessor includes:
the power supply manager, the bow net arc drawing information processor and the power grid outage information processor are respectively connected with the bow net arc drawing and electric energy acquisition sensor;
the network cable connected with the network cable passing sensor passes through an information processor;
a vibration impact information processor connected with the two vibration impact composite sensors respectively;
the transmitting/receiving device is respectively connected with the bow net arc drawing information processor, the power grid outage information processor and the output end of the net wire passing information processor and the vibration impact information processor;
the output end of the power supply manager is respectively connected with the vibration impact composite sensor, the network cable passing sensor, the bow net arc drawing information processor, the power grid outage information processor, the network cable passing information processor, the vibration impact information processor and the power supply end of the transmitting/receiving device; the power manager is used for providing power sources with corresponding sizes for the processors, the sensors and the transmitting/receiving devices.
Preferably, the power manager specifically comprises a 5V voltage regulator, -5V voltage regulator and a 3.6V voltage regulator;
the 5V voltage stabilizer is connected with the output end of the arc discharge and electric energy acquisition sensor of the arc net, and the input ends of the-5V voltage stabilizer and the 3.6V voltage stabilizer are connected with the output end of the 5V voltage stabilizer;
the positive output end of the 5V voltage stabilizer is respectively connected with the vibration impact composite sensor, the network cable passing sensor, the bow net arc-drawing information processor, the power grid outage information processor and the positive power supply end of the network cable passing information processor;
the negative output end of the-5V voltage stabilizer is connected with the negative power supply end of the vibration impact information processor;
the positive output end of the 3.6V voltage stabilizer is connected with the positive electrode power supply end of the transmitting/receiving device;
the vibration impact composite sensor, the network cable pass through the sensor, the bow net arc information processor, the power grid outage information processor, the network cable pass through the information processor and the zero pole power supply end of the transmitting/receiving device, the zero pole output ends of the 5V voltage stabilizer and the 3.6V voltage stabilizer are all grounded, and the zero pole output end of the-5V voltage stabilizer is grounded.
Preferably, the arcnet arc drawing information processor specifically comprises a detector and a first low-pass filter;
the input end of the detector is connected with the arc discharge signal output end of the arc net arc discharge and electric energy acquisition sensor, and the output end of the detector is connected with the input end of the first low-pass filter; the output end of the first low-pass filter is connected with the transmitting/receiving device.
Preferably, the detector specifically includes a first capacitor, a first operational amplifier, a second operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, and a second diode;
the first low-pass filter comprises a second capacitor, a third capacitor, a fifth resistor, a sixth resistor and a third operational amplifier;
the first end of the first capacitor is connected with the arc discharging signal output end of the arc net arc discharging and electric energy obtaining sensor, and the second end of the first capacitor is respectively connected with the positive input end of the first operational amplifier and is grounded after passing through the first resistor; the negative input end of the first operational amplifier is respectively connected with the anode of the second diode and the first end of the second resistor; the output end of the first operational amplifier is respectively connected with the anode of the first diode and the cathode of the second diode; the cathode of the first diode is respectively connected with the first end of the third resistor and the positive input end of the second operational amplifier; the second end of the third resistor is grounded; the negative input end of the second operational amplifier is respectively connected with the second end of the second resistor and the first end of the fourth resistor; the output end of the second operational amplifier is connected with the second end of the fourth resistor and then used as the signal output end of the detector;
the signal output end of the detector is connected with the first end of the fifth resistor; the second end of the fifth resistor is connected with the first end of the sixth resistor and the first end of the second capacitor respectively; the second ends of the sixth resistors are respectively connected with the third operation a positive input of the amplifier and a first end of the third capacitor; the second end of the third capacitor is grounded; and the negative input end of the third operational amplifier is connected with the output end of the third operational amplifier and the second end of the second capacitor and then used as the output end of the first low-pass filter.
Preferably, the network cable comprises a second low-pass filter and an amplitude discrimination trigger through an information processor;
the input end of the second low-pass filter is connected with the output end of the network cable passing sensor, and the output end of the second low-pass filter is connected with the input end of the amplitude discrimination trigger; the output end of the amplitude discrimination trigger is connected with the transmitting/receiving device. Preferably the ground is used to determine the position of the ground, the second low-pass filter comprises a fourth capacitor, a fifth capacitor, a seventh resistor, an eighth resistor and a fourth operational amplifier;
the amplitude discrimination trigger comprises a first phase-inverting amplifier and a second phase-inverting amplifier;
the first end of the seventh resistor is connected with the output end of the network cable passing sensor, and the second end of the seventh resistor is respectively connected with the first end of the fourth capacitor and the first end of the eighth resistor; the second end of the eighth resistor is respectively connected with the first end of the fifth capacitor and the positive input end of the fourth operational amplifier, and the second end of the fifth capacitor is grounded; the negative input end of the fourth operational amplifier is respectively connected with the output end of the fourth operational amplifier and the second end of the fourth capacitor and then used as the signal output end of the second low-pass filter;
the signal output end of the second low-pass filter is connected with the input end of the first phase-inverting amplifier, the output end of the first phase-inverting amplifier is connected with the input end of the second phase-inverting amplifier, and the output end of the second phase-inverting amplifier is used as the output end of the amplitude discrimination trigger.
Preferably, the power grid outage information processor comprises a rectifier and a power grid discriminator;
the input end of the rectifier is connected with the power grid outage signal output end of the bow net arcing and electric energy acquisition sensor, and the output end of the rectifier is connected with the input end of the power grid discriminator; the output end of the power grid discriminator is connected with the transmitting/receiving device;
the power grid discriminator is used for outputting a logic high level when the power grid is electrified and outputting a logic low level when the power grid is deenergized according to the power grid signal processed by the rectifier.
Preferably, the rectifier includes a sixth capacitor, a seventh capacitor, a ninth resistor, a tenth resistor, a third diode, and a fourth diode;
the grid discriminator comprises a third inverting amplifier and a fourth inverting amplifier;
the first end of the sixth capacitor is respectively connected with the power grid outage signal output end of the bow net arcing and electric energy acquisition sensor and the first end of the ninth resistor, and the second end of the ninth resistor is grounded; the second end of the sixth capacitor is respectively connected with the anode of the third diode and the cathode of the fourth diode, and the cathode of the third diode is respectively connected with the first end of the seventh capacitor and the first end of the tenth resistor and then used as the signal output end of the rectifier; the anode of the fourth diode, the second end of the seventh capacitor and the second end of the tenth resistor are grounded;
the signal output end of the rectifier is connected with the input end of the third phase-inverting amplifier, the output end of the third phase-inverting amplifier is connected with the input end of the fourth phase-inverting amplifier, and the output end of the fourth phase-inverting amplifier is used as the output end of the power grid discriminator.
Preferably, the vibration impact information processor includes a stack and a low-pass resonator;
the input end of the adder is connected with the output end of the vibration impact composite sensor, and the output end of the adder is connected with the input end of the low-pass resonator; the output end of the low-pass resonator is connected with the transmitting/receiving device;
the adder includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a fifth operational amplifier;
the low-pass resonator includes a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, and a sixth operational amplifier;
the first end of the eleventh resistor and the first end of the twelfth resistor are respectively and correspondingly connected with the output ends of the two vibration impact compound sensors; the second ends of the eleventh resistor and the twelfth resistor are connected in parallel and then are respectively connected with the first end of the thirteenth resistor and the negative input end of the fifth operational amplifier; the positive input end of the fifth operational amplifier is grounded; the second end of the thirteenth resistor is connected with the output end of the fifth operational amplifier and then used as the signal output end of the adder;
the signal output end of the adder is connected with the first end of the fourteenth resistor, and the second end of the fourteenth resistor is respectively connected with the first end of the fifteenth resistor and the first end of the eighth capacitor; the second end of the fifteenth resistor is connected with the first end of the tenth capacitor and the first end of the sixteenth resistor respectively; the second end of the sixteenth resistor is respectively connected with the first end of the ninth capacitor and the positive input end of the sixth operational amplifier, and the negative input end of the sixth operational amplifier is respectively connected with the first end of the seventeenth resistor and the first end of the eighteenth resistor; the output end of the sixth operational amplifier is respectively connected with the second end of the tenth capacitor and the second end of the eighteenth resistor and then used as the output end of the low-pass resonator;
the second ends of the eighth capacitor, the ninth capacitor and the seventeenth resistor are grounded.
The invention provides a bow net fault monitoring device, which is characterized in that various signals on a pantograph are acquired through a bow net arcing and electric energy acquisition sensor, a vibration impact composite sensor and a net wire passing sensor which are arranged on corresponding parts of the pantograph and are transmitted to a pre-processor, and the pre-processor analyzes the net wire passing information, arcing information, electric energy information, vibration impact information and the like on the pantograph according to the received signals, so that the function of monitoring the bow net fault is realized. Therefore, compared with an image monitoring mode, the method has the advantages of low cost, easy maintenance, strong anti-interference capability, small data volume and high calculation efficiency when fault analysis is carried out later, and the arc-pulling faults of the power grid can influence arc-pulling of the power grid, voltage signals of electric energy acquisition and sensing and the like, so that the method can detect the arc-pulling faults on the pantograph.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an arch network fault monitoring device provided by the invention;
fig. 2 is a schematic structural diagram of another bow net fault monitoring device provided by the present invention;
fig. 3 is a schematic structural diagram of a power manager in an arch network fault monitoring device according to the present invention;
fig. 4 is a schematic circuit diagram of an arc net arcing information processor in the arc net fault monitoring device provided by the invention;
fig. 5 is a schematic circuit diagram of a network cable passing through an information processor in the bow net fault monitoring device provided by the invention;
fig. 6 is a schematic circuit diagram of a power grid outage information processor in the bow net fault monitoring device provided by the invention;
fig. 7 is a schematic diagram of an arch network fault monitoring device according to the present invention the vibration of the vibration impact information processor.
Detailed Description
The invention has the core of providing the bow net fault monitoring device, adopting a sensor signal monitoring mode, having low cost, easy maintenance, strong anti-interference capability, small data volume, high calculation efficiency and more various monitored fault types during the subsequent fault analysis.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides an arch network fault monitoring device, which is shown in fig. 1, wherein fig. 1 is a schematic structural diagram of the arch network fault monitoring device; the device comprises:
a bow net arc-pulling and electric energy obtaining sensor 2 connected to the arm rod or current lead of the pantograph in a penetrating way;
two vibration impact compound sensors 1 (such as 11 and 12 components in fig. 1) mounted at both ends of the pantograph;
a preset number of wires installed on the pantograph support plate at intervals pass through the sensor 3 (for identifying the contact position of the wires with the pantograph); the net twine passing sensor 3 is photoelectrically diffuse reflection type, the number is preferably 4 to 5, as shown in fig. 1, and 5 net twine passing sensors 31/32/33/34/35 are arranged in fig. 1; wherein the spacing between the individual wires passing the sensors 3 is preferably the same, but the specific spacing size is not particularly limited by the present invention.
The pre-processor 4 is connected with the arcade net arc drawing and electric energy obtaining sensor 2, the vibration impact composite sensor 1 and the net wire passing sensor 3 respectively, and the pre-processor 4 is used for obtaining signals extracted by the sensors and processing information.
In a specific embodiment, referring to fig. 2, the preprocessor 4 includes:
the power supply manager 421, the bow net arc drawing information processor 422 and the power grid outage information processor 423 are respectively connected with the bow net arc drawing and electric energy obtaining sensor 2;
a network line connected to the network line passing sensor 3 passes through the information processor 43;
a vibration impact information processor 41 connected to the two vibration impact composite sensors 1, respectively;
a transmitting/receiving device 44 connected to the output ends of the bow net arc information processor 422, the power grid outage information processor 423, the net wire passing information processor 43 and the vibration impact information processor 41, respectively;
the output end of the power manager 421 is respectively connected with the power supply ends of the vibration impact composite sensor 1, the network cable passing sensor 3, the bow net arc information processor 422, the power grid outage information processor 423, the network cable passing information processor 43, the vibration impact information processor 41 and the transmitting/receiving device 44; the power manager 421 is used to supply power of a corresponding size to each of the above processors, each of the sensors, and the transmitting/receiving device 44, respectively.
The power manager 421 processes the power signal sent by the arc net arcing and power obtaining sensor 2 correspondingly, and obtains power voltages with different magnitudes to supply power to different device apparatuses respectively.
In a preferred embodiment, the power manager 421 specifically includes a 5V voltage regulator 4211, -5V voltage regulator 4212, and a 3.6V voltage regulator 4213; referring to fig. 3, fig. 3 is a schematic structural diagram of a power manager 421 in an arch network fault monitoring device according to the present invention;
the 5V voltage stabilizer 4211 is connected with the output end of the bow net arc discharge and electric energy acquisition sensor 2; an input of the 5V voltage regulator 4212 and the 3.6V voltage regulator 4213 is connected to an output of the 5V voltage regulator 4211;
the positive output end of the 5V voltage stabilizer 4211 is respectively connected with the vibration impact composite sensor 1, the network cable passing sensor 3, the bow net arc information processor 422, the power grid outage information processor 423 and the positive electrode power supply end of the network cable passing information processor 43;
the positive output end of the 5V voltage stabilizer 4212 is connected with the negative power supply end of the vibration impact information processor 41;
the positive output end of the 3.6V voltage stabilizer 4213 is connected to the positive power supply end of the transmitting/receiving device 44;
the zero pole output ends of the vibration impact composite sensor 1, the network cable passing through the sensor 3, the bow net arc information processor 422, the power grid outage information processor 423, the network cable passing through the information processor 43 and the transmitting/receiving device 44, and the 5V voltage stabilizer 4211, -5V voltage stabilizer 4212 and the 3.6V voltage stabilizer 4213 are all grounded.
Of course, the above is only a preferred embodiment, and the number of voltage regulators specifically included in the power manager 421 and the voltage stabilizing value outputted by each voltage regulator are not specifically limited by the present invention.
In one embodiment, to reject the high frequency component of the arcnet arc signal while preserving its amplitude to reduce the rate requirements of the transmitting/receiving device 44, the arcnet arc information processor 422 includes in particular a detector 4221 and a first low pass filter 4222;
the input end of the detector 4221 is connected with the arc discharging signal output end of the arc net arc discharging and electric energy obtaining sensor 2, and the output end of the detector 4221 is connected with the input end of the first low-pass filter 4222; the output of the first low-pass filter 4222 is connected to the transmitting/receiving means 44.
Further, referring to fig. 4, fig. 4 is a schematic circuit diagram of an arc net arc striking information processor 422 in the arc net fault monitoring device according to the present invention; the detector 4221 specifically includes a first capacitor C1, a first operational amplifier OP1, a second operational amplifier OP2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, and a second diode D2;
the first low-pass filter 4222 includes a second capacitor C2, a third capacitor C3, a fifth resistor R5, a sixth resistor R6, and a third operational amplifier OP3;
the first end of the first capacitor C1 is connected with the arc discharging signal output end of the arc discharging net and electric energy obtaining sensor 2, and the second end of the first capacitor C1 is respectively connected with the positive input end of the first operational amplifier OP1 and is grounded after passing through the first resistor R1; the negative input end of the first operational amplifier OP1 is respectively connected with the anode of the second diode D2 and the first end of the second resistor R2; the output end of the first operational amplifier OP1 is respectively connected with the anode of the first diode D1 and the cathode of the second diode D2; the cathode of the first diode D1 is respectively connected with the first end of the third resistor R3 and the positive input end of the second operational amplifier OP 2; the second end of the third resistor R3 is grounded; the negative input end of the second operational amplifier OP2 is respectively connected with the second end of the second resistor R2 and the first end of the fourth resistor R4; the output end of the second operational amplifier OP2 is connected to the second end of the fourth resistor R4 and then used as the signal output end of the detector 4221;
the signal output end of the detector 4221 is connected with the first end of the fifth resistor R5; the second end of the fifth resistor R5 is respectively connected with the first end of the sixth resistor R6 and the first end of the second capacitor C2; the second end of the sixth resistor R6 is respectively connected with the positive input end of the third operational amplifier OP3 and the first end of the third capacitor C3; the second end of the third capacitor C3 is grounded; the negative input terminal of the third operational amplifier OP3 is connected to the output terminal thereof and the second terminal of the second capacitor C2, and then is used as the output terminal of the first low-pass filter 4222.
In one embodiment, to reject occasional spurious interference and interference of distant objects on the electro-optical diffuse reflection type network cable passing sensor 3 while retaining network cable passing information, the network cable passing information processor 43 includes a second low pass filter 431 and an amplitude discrimination trigger 432;
an input end of the second low-pass filter 431 is connected with an output end of the network cable passing sensor 3, and an output end of the second low-pass filter 431 is connected with an input end of the amplitude discrimination trigger 432; the output of the amplitude discrimination trigger 432 is connected to the transmitting/receiving device 44. Further, referring to fig. 5, fig. 5 is a schematic circuit diagram of a network cable passing through the information processor 43 in the bow net fault monitoring device according to the present invention; the second low-pass filter 431 includes a fourth capacitor C4, a fifth capacitor C5, a seventh resistor R7, an eighth resistor R8, and a fourth operational amplifier OP4;
the amplitude discrimination flip-flop 432 includes a first inverting amplifier U1 and a second inverting amplifier U2;
the first end of the seventh resistor R7 is connected with the output end of the network cable passing through the sensor 3, and the second end of the seventh resistor R7 is respectively connected with the first end of the fourth capacitor C4 and the first end of the eighth resistor R8; the second end of the eighth resistor R8 is respectively connected with the first end of the fifth capacitor C5 and the positive input end of the fourth operational amplifier OP4, and the second end of the fifth capacitor C5 is grounded; the negative input end of the fourth operational amplifier OP4 is connected to the output end thereof and the second end of the fourth capacitor C4, respectively, and then is used as the signal output end of the second low-pass filter 431;
the signal output end of the second low-pass filter 431 is connected to the input end of the first inverting amplifier U1, the output end of the first inverting amplifier U1 is connected to the input end of the second inverting amplifier U2, and the output end of the second inverting amplifier U2 is used as the output end of the amplitude discrimination trigger 432.
In one embodiment, to obtain the amplitude information of the power frequency signal of the power grid power and to implement quantization to digital information, so as to reduce the quantization requirement of the transmitting/receiving device 44, the power grid outage information processor 423 includes a rectifier 4231 and a power grid discriminator 4232;
the input end of the rectifier 4231 is connected with the power grid outage signal output end of the bow net arcing and electric energy acquisition sensor 2, and the output end of the rectifier 4231 is connected with the input end of the power grid discriminator 4232; the output of the grid discriminator 4232 is connected to a transmitting/receiving device 44;
the grid discriminator 4232 is configured to output a logic high level when the power grid is powered on and output a logic low level when the power grid is powered off according to the grid signal processed by the rectifier 4231.
The rectifier 4231 can smooth and rectify the power outage signal sent by the arc net arcing and power acquisition sensor 2, and output a smoothed voltage value power grid discriminator 4232, where the logic high level of the power grid discriminator 4232 may be 5V, the logic low level may be 0V, and of course, the logic high level and the logic low level may be set freely on average, which is not limited in the present invention.
Further, referring to fig. 6, fig. 6 is a schematic circuit diagram of a power grid outage information processor 423 in the bow net fault monitoring device according to the present invention; the rectifier 4231 includes a sixth capacitor C6, a seventh capacitor C7, a ninth resistor R9, a tenth resistor R10, a third diode D3, and a fourth diode D4;
grid discriminator 4232 comprises a third inverting amplifier U3 and a fourth inverting amplifier U4;
the first end of the sixth capacitor C6 is respectively connected with the power grid outage signal output end of the bow net arcing and electric energy acquisition sensor 2 and the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is grounded; the second end of the sixth capacitor C6 is connected to the anode of the third diode D3 and the cathode of the fourth diode D4, and the cathode of the third diode D3 is connected to the first end of the seventh capacitor C7 and the first end of the tenth resistor R10, respectively, and then is used as the signal output end of the rectifier 4231; the anode of the fourth diode D4, the second end of the seventh capacitor C7 and the second end of the tenth resistor R10 are grounded;
the signal output end of the rectifier 4231 is connected to the input end of the third inverting amplifier U3, the output end of the third inverting amplifier U3 is connected to the input end of the fourth inverting amplifier U4, and the output end of the fourth inverting amplifier U4 is used as the output end of the grid discriminator 4232.
In a specific embodiment, in order to simplify the acquisition and transmission complexity of the vibration of the pantograph and the fault impact information of the pantograph net obtained by the vibration impact composite sensor 1, by utilizing the two vibration impact composite sensors 1 and the complementarity of the fault impact information to the pantograph net (see fig. 1, when the fault impact occurs at the first end of the pantograph, the signal of the vibration impact composite sensor 11 is strong, and the signal of the vibration impact composite sensor 12 at the second end of the pantograph is weak), the vibration impact information processor 41 comprises a superimposer 411 and a low-pass resonator 412;
the input end of the adder 411 is connected with the output end of the vibration impact compound sensor 1, and the output end of the adder 411 is connected with the input end of the low-pass resonator 412; the output of the low-pass resonator 412 is connected to the transmitting/receiving device 44;
here, the adder 411 is for adding the signals of the two vibration impact composite sensors 1 into one signal by an adder, and the low-pass resonator 412 is for reducing the impact generalized resonance information frequency range of the added signal determined by the mechanical resonance of the vibration impact composite sensor 1 to reduce the transmission band of the transmitting/receiving device 44 while maintaining the low-frequency vibration signal.
Further, referring to fig. 7, fig. 7 is a schematic circuit diagram of a vibration impact information processor 41 in the bow net fault monitoring device according to the present invention. The adder 411 includes an eleventh resistor R11 a twelfth resistor R12 a thirteenth resistor R13 and a fifth operational amplifier OP5;
the low-pass resonator 412 includes a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, and a sixth operational amplifier OP6;
the first end of the eleventh resistor R11 and the first end of the twelfth resistor R12 are respectively correspondingly connected with the output ends of the two vibration impact compound sensors 1; the second ends of the eleventh resistor R11 and the twelfth resistor R12 are connected in parallel and then are respectively connected with the first end of the thirteenth resistor R13 and the negative input end of the fifth operational amplifier OP5; the positive input end of the fifth operational amplifier OP5 is grounded; the second end of the thirteenth resistor R13 is connected to the output end of the fifth operational amplifier OP5 and then used as the signal output end of the adder 411;
the signal output end of the adder 411 is connected to the first end of the fourteenth resistor R14, and the second end of the fourteenth resistor R14 is connected to the first end of the fifteenth resistor R15 and the first end of the eighth capacitor C8, respectively; the second end of the fifteenth resistor R15 is respectively connected with the first end of the tenth capacitor C10 and the first end of the sixteenth resistor R16; the second end of the sixteenth resistor R16 is respectively connected with the first end of the ninth capacitor C9 and the positive input end of the sixth operational amplifier, and the negative input end of the sixth operational amplifier is respectively connected with the first end of the seventeenth resistor R17 and the first end of the eighteenth resistor R18; the output end of the sixth operational amplifier is connected with the second end of the tenth capacitor C10 and the second end of the eighteenth resistor R18 respectively and then used as the output end of the low-pass resonator 412;
the second terminals of the eighth capacitor C8, the ninth capacitor C9 and the seventeenth resistor R17 are grounded.
The invention provides a bow net fault monitoring device, which is characterized in that various signals on a pantograph are acquired through a bow net arcing and electric energy acquisition sensor, a vibration impact composite sensor and a net wire passing sensor which are arranged on corresponding parts of the pantograph and are transmitted to a pre-processor, and the pre-processor analyzes the net wire passing information, arcing information, electric energy information, vibration impact information and the like on the pantograph according to the received signals, so that the function of monitoring the bow net fault is realized. Therefore, compared with an image monitoring mode, the method has the advantages of low cost, easy maintenance, strong anti-interference capability, small data volume and high calculation efficiency when fault analysis is carried out later, and the arc-pulling faults of the power grid can influence arc-pulling of the power grid, voltage signals of electric energy acquisition and sensing and the like, so that the method can detect the arc-pulling faults on the pantograph.
The above embodiments are only preferred embodiments of the present invention, and the above embodiments may be arbitrarily combined, and the combined embodiments are also within the scope of the present invention. It should be noted that other modifications and variations to the present invention can be envisioned by those of ordinary skill in the art without departing from the spirit and scope of the present invention.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. An arch network fault monitoring device, comprising:
the bow net arc-pulling and electric energy obtaining sensor is connected to the pantograph arm rod or the current lead in a penetrating way;
two vibration impact compound sensors mounted at two ends of the pantograph;
a preset number of net wires which are arranged on the pantograph supporting plate at intervals pass through the sensor;
the pre-processor is connected with the arc net arc drawing and electric energy obtaining sensor, the vibration impact composite sensor and the net wire through sensors respectively, and is used for obtaining signals extracted by the sensors and processing information;
the preprocessor includes:
the power supply manager, the bow net arc drawing information processor and the power grid outage information processor are respectively connected with the bow net arc drawing and electric energy acquisition sensor;
the network cable connected with the network cable passing sensor passes through an information processor;
a vibration impact information processor connected with the two vibration impact composite sensors respectively;
respectively connected with the arc net arc-drawing information processor, the power grid power-off information processor the network cable passes through the information processor and the transmitting/receiving device connected with the output end of the vibration impact information processor;
the output end of the power supply manager is respectively connected with the vibration impact composite sensor, the network cable passing sensor, the bow net arc drawing information processor, the power grid outage information processor, the network cable passing information processor, the vibration impact information processor and the power supply end of the transmitting/receiving device; the power manager is used for providing power sources with corresponding sizes for the processors, the sensors and the sending/receiving devices respectively;
the power manager specifically comprises a 5V voltage stabilizer, -5V voltage stabilizer and a 3.6V voltage stabilizer;
the 5V voltage stabilizer is connected with the output end of the arc discharge and electric energy acquisition sensor of the arc net, and the input ends of the-5V voltage stabilizer and the 3.6V voltage stabilizer are connected with the output end of the 5V voltage stabilizer;
the positive output end of the 5V voltage stabilizer is respectively connected with the vibration impact composite sensor, the network cable passing sensor, the bow net arc-drawing information processor, the power grid outage information processor and the positive power supply end of the network cable passing information processor;
the positive output end of the-5V voltage stabilizer is connected with the negative electrode power supply end of the vibration impact information processor;
the positive output end of the 3.6V voltage stabilizer is connected with the positive electrode power supply end of the transmitting/receiving device;
the vibration impact composite sensor, the network cable passing through the sensor, the bow net arc drawing information processor, the power grid outage information processor, the network cable passing through the information processor and the zero pole power supply end of the transmitting/receiving device, the zero pole output ends of the 5V voltage stabilizer and the 3.6V voltage stabilizer are all grounded, and the zero pole output end of the-5V voltage stabilizer is grounded;
the arcnet arc drawing information processor specifically comprises a detector and a first low-pass filter;
the input end of the detector is connected with the arc discharge signal output end of the arc net arc discharge and electric energy acquisition sensor, the output end of the detector is connected with the input end of the first low-pass filter; the output end of the first low-pass filter is connected with the transmitting/receiving device;
the detector specifically includes a first capacitor, a first operational amplifier, a second operational amplifier the first resistor, the second resistor, the third resistor, the fourth resistor, the first diode and the second diode;
the first low-pass filter comprises a second capacitor, a third capacitor, a fifth resistor, a sixth resistor and a third operational amplifier;
the first end of the first capacitor is connected with the arc discharging signal output end of the arc net arc discharging and electric energy obtaining sensor, and the second end of the first capacitor is respectively connected with the positive input end of the first operational amplifier and is grounded after passing through the first resistor; the negative input end of the first operational amplifier is respectively connected with the anode of the second diode and the first end of the second resistor; the output end of the first operational amplifier is respectively connected with the anode of the first diode and the cathode of the second diode; the cathode of the first diode is respectively connected with the first end of the third resistor and the positive input end of the second operational amplifier; the second end of the third resistor is grounded; the negative input end of the second operational amplifier is respectively connected with the second end of the second resistor and the first end of the fourth resistor; the output end of the second operational amplifier is connected with the second end of the fourth resistor and then used as the signal output end of the detector;
the signal output end of the detector is connected with the first end of the fifth resistor; the second end of the fifth resistor is connected with the first end of the sixth resistor and the first end of the second capacitor respectively; the second end of the sixth resistor is respectively connected with the positive input end of the third operational amplifier and the first end of the third capacitor; the second end of the third capacitor is grounded; and the negative input end of the third operational amplifier is connected with the output end of the third operational amplifier and the second end of the second capacitor and then used as the output end of the first low-pass filter.
2. The apparatus of claim 1, wherein the network cable pass information processor comprises a second low pass filter and an amplitude discrimination trigger;
the input end of the second low-pass filter is connected with the output end of the network cable passing sensor, and the output end of the second low-pass filter is connected with the input end of the amplitude discrimination trigger; the output end of the amplitude discrimination trigger is connected with the transmitting/receiving device;
the second low-pass filter comprises a fourth capacitor, a fifth capacitor, a seventh resistor, an eighth resistor and a fourth operational amplifier;
the amplitude discrimination trigger comprises a first phase-inverting amplifier and a second phase-inverting amplifier;
the first end of the seventh resistor is connected with the output end of the network cable passing sensor, and the second end of the seventh resistor is respectively connected with the first end of the fourth capacitor and the first end of the eighth resistor; the second end of the eighth resistor is respectively connected with the first end of the fifth capacitor and the positive input end of the fourth operational amplifier, and the second end of the fifth capacitor is grounded; the negative input end of the fourth operational amplifier is respectively connected with the output end of the fourth operational amplifier and the second end of the fourth capacitor and then used as the signal output end of the second low-pass filter;
the signal output end of the second low-pass filter is connected with the input end of the first phase-inverting amplifier, the output end of the first phase-inverting amplifier is connected with the input end of the second phase-inverting amplifier, and the output end of the second phase-inverting amplifier is used as the output end of the amplitude discrimination trigger.
3. The apparatus of claim 1, wherein the grid outage information processor comprises a rectifier and a grid discriminator;
the input end of the rectifier is connected with the power grid outage signal output end of the bow net arcing and electric energy acquisition sensor, and the output end of the rectifier is connected with the input end of the power grid discriminator; the output end of the power grid discriminator is connected with the transmitting/receiving device;
the power grid discriminator is used for outputting a logic high level when the power grid is electrified and outputting a logic low level when the power grid is deenergized according to the power grid signal processed by the rectifier;
the rectifier comprises a sixth capacitor, a seventh capacitor, a ninth resistor, a tenth resistor, a third diode and a fourth diode;
the grid discriminator comprises a third inverting amplifier and a fourth inverting amplifier;
the first end of the sixth capacitor is respectively connected with the power grid outage signal output end of the bow net arcing and electric energy acquisition sensor and the first end of the ninth resistor, and the second end of the ninth resistor is grounded; the second end of the sixth capacitor is respectively connected with the anode of the third diode and the cathode of the fourth diode, and the cathode of the third diode is respectively connected with the first end of the seventh capacitor and the first end of the tenth resistor and then used as the signal output end of the rectifier; the anode of the fourth diode, the second end of the seventh capacitor and the second end of the tenth resistor are grounded;
the signal output end of the rectifier is connected with the input end of the third phase-inverting amplifier, the output end of the third phase-inverting amplifier is connected with the input end of the fourth phase-inverting amplifier, and the output end of the fourth phase-inverting amplifier is used as the output end of the power grid discriminator.
4. The apparatus of claim 1, wherein the vibratory impulse information processor comprises a superimposer and a low pass resonator;
the input end of the adder is connected with the output end of the vibration impact composite sensor, and the output end of the adder is connected with the input end of the low-pass resonator; the output end of the low-pass resonator is connected with the transmitting/receiving device;
the adder includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a fifth operational amplifier;
the low-pass resonator includes a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, and a sixth operational amplifier;
the first end of the eleventh resistor and the first end of the twelfth resistor are respectively and correspondingly connected with the output ends of the two vibration impact compound sensors; the second ends of the eleventh resistor and the twelfth resistor are connected in parallel and then are respectively connected with the first end of the thirteenth resistor and the negative input end of the fifth operational amplifier; the positive input end of the fifth operational amplifier is grounded; the second end of the thirteenth resistor is connected with the output end of the fifth operational amplifier and then used as the signal output end of the adder;
the signal output end of the adder is connected with the first end of the fourteenth resistor, and the second end of the fourteenth resistor is respectively connected with the first end of the fifteenth resistor and the first end of the eighth capacitor; the second end of the fifteenth resistor is connected with the first end of the tenth capacitor and the first end of the sixteenth resistor respectively; the second end of the sixteenth resistor is respectively connected with the first end of the ninth capacitor and the positive input end of the sixth operational amplifier, and the negative input end of the sixth operational amplifier is respectively connected with the first end of the seventeenth resistor and the first end of the eighteenth resistor; the output end of the sixth operational amplifier is respectively connected with the second end of the tenth capacitor and the second end of the eighteenth resistor and then used as the output end of the low-pass resonator;
the second ends of the eighth capacitor, the ninth capacitor and the seventeenth resistor are grounded.
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