CN107765066B - Long-rod clamp-type ammeter and circuit analysis method thereof - Google Patents
Long-rod clamp-type ammeter and circuit analysis method thereof Download PDFInfo
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- CN107765066B CN107765066B CN201710819412.1A CN201710819412A CN107765066B CN 107765066 B CN107765066 B CN 107765066B CN 201710819412 A CN201710819412 A CN 201710819412A CN 107765066 B CN107765066 B CN 107765066B
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Abstract
A long-rod type clamp-on ammeter comprises a connecting rope, an insulating telescopic rod and a clamp-on ammeter head, wherein the bottom of the clamp-on ammeter head is detachably connected with a connector and is electrically connected with an operating platform; the connector is detachably connected with the meter head of the clamp-on ammeter and is fixedly connected with the insulating telescopic rod; the insulating handle is sleeved with the bottom of the insulating telescopic rod and is fixedly connected with the operating platform; and the operating platform is fixedly connected with the insulating handle and is electrically connected with the meter head of the clamp-on ammeter through a hollow lead of the insulating telescopic rod. The telescopic length that insulating telescopic link can adjust needs wantonly, and the direction can be adjusted to the gauge outfit, and the demonstration information that the display can be clear can not receive the angle influence.
Description
Technical Field
The invention relates to the field of clamp type ampere meters, in particular to a long rod type clamp type ampere meter and a circuit analysis method thereof.
Background
With the increasing development of smart power grids, the total protection leakage tripping rate of a transformer area is an important index of the smart power grids, and meanwhile, effective and rapid leakage current detection means is lacked in the real power grids, so that the total leakage protection device can be tripped due to leakage current, property loss is caused by power interruption, and troubleshooting is time-consuming, labor-consuming and cost-consuming. The daily troubleshooting of power supply station leakage fault usually adopts 2 people a set of from switch board bus-out terminal, on every node the ladder-climbing, insert along the wall line with the clip-on ammeter clamp, and read the method of leakage current numerical value and judge. According to statistics, the electric leakage of the single station area is checked, and the average time is 2 hours.
The project realizes effective and rapid detection of the total protection leakage tripping leakage current of the transformer area. According to statistics, the single electric leakage inspection station can be operated by a single person, the average consumed time is 0.5 hour, the working efficiency is improved by more than 4 times, and the electric power marketing management and high-quality service level are improved.
Chinese laid-open patent No. CN 204945230U, open 2016 year 1 month 6 days a day, the utility model discloses a telescopic clamp type ampere meter is disclosed to telescopic clamp type ampere meter, it relates to ampere meter technical field, the ampere meter head is installed on the shell, the overhead electromagnetic switch that installs of ampere meter, install wireless transmission module on the shell, wireless transmission module is connected with the ampere meter head, be provided with the binding clip draw-in groove on the shell, the screw is installed to the upper end of telescopic link, the internal thread jogged joint on screw and the shell, the upside of ampere meter body is provided with mounting groove, install the telescopic link in the mounting groove, install remote switch on the ampere meter body, be provided with wireless display on the ampere meter body, wireless display's joint piece and the joint groove joint of ampere meter body.
However, the disadvantage is that the hand-held part is short, and the user cannot judge whether the detected lead is electrified, and the direction of the watch head can be adjusted only by walking and shaking.
Disclosure of Invention
The invention provides a long rod type clamp ammeter aiming at solving the problems that the handheld part is short, whether a detection lead is electrified or not cannot be judged, and the meter head cannot be adjusted.
A long-rod type clamp-on ammeter comprises a connecting rope, an insulating telescopic rod and a clamp-on ammeter head, wherein the bottom of the clamp-on ammeter head is detachably connected with a connector and is electrically connected with an operating platform; the connector is detachably connected with the meter head of the clamp-on ammeter and is fixedly connected with the insulating telescopic rod; the insulating handle is sleeved with the bottom of the insulating telescopic rod and is fixedly connected with the operating platform; and the operating platform is fixedly connected with the insulating handle and is electrically connected with the meter head of the clamp-on ammeter through a hollow lead of the insulating telescopic rod.
The telescopic link adopts insulating material preparation, can prevent that the telescopic link from leading to electricity, and telescopic link multisection cup joints and accomplishes arbitrary regulation through cup jointing department regulator.
Preferably, the top sections of the connecting ropes are provided with tooth balls at equal intervals and matched with the bayonet gears for transmission work, the tops of the connecting ropes are detachably connected with the fixed iron core, and the tail parts of the connecting ropes are fixedly connected with the insulating handle; the clip-on ammeter gauge outfit, include: the middle part of the fixed iron core is hinged with the movable iron core, the middle part of the fixed iron core is fixedly connected with the reset spring, the tail part of the fixed iron core is detachably connected with the connector, and the tail part of the fixed iron core is detachably connected with the connecting rope and is electrically connected with the induction circuit; the middle part of the movable iron core is hinged with the fixed iron core, the middle part of the movable iron core is fixedly connected with the reset spring, and the tail part of the movable iron core is fixedly connected with the jaw driving motor; the electricity testing metal head is used for determining whether power failure equipment or a power failure lead has no voltage, is arranged at the head part of the movable iron core, is fixedly connected with the movable iron core and is electrically connected with the pre-amplification circuit; the induction circuit is electrically connected with the movable iron core, the fixed iron core and the operation platform; the reset spring is fixedly connected with the fixed iron core and the movable iron core by resetting the position of the movable iron core; the jaw driving motor is arranged at the tail part of the movable iron core and is electrically connected with a motor driving circuit; and the motor driving circuit is used for driving the jaw driving motor and is electrically connected with the operating platform.
The meter head of the clamp-on ammeter is controlled to be opened and closed by adopting a mode of matching the toothed ball and the bayonet gear, so that the connection control of the toothed ball can be realized by motor rotation control and manual pulling of an operator. The electricity testing metal head arranged at the top end of the iron core can detect whether the detected lead is electrified or not before current detection.
Preferably, the connector further includes: the meter head fixer is used for fixing the meter head of the clamp-on ammeter, is detachably connected with the meter head of the clamp-on ammeter and is fixedly connected with the angle regulator; the telescopic rod fixer is provided with an inlet opening for leading in a connecting wire and a connecting rope, and the connecting rope is arranged on the telescopic rod fixer; the telescopic rod fixer is used for fixing the connector and the insulating telescopic rod, is fixedly connected with the angle regulator, is sleeved with the insulating telescopic rod and is fixedly connected with the insulating telescopic rod through a bolt; the angle regulator is used for regulating the direction of the meter head of the clamp-on ammeter, is fixedly connected with the meter head fixer and is fixedly connected with the telescopic rod fixer.
The gauge outfit fixer is connected with the tail part of the fixed iron core in a detachable way through screw connection. The angle regulator can adjust the angle between gauge outfit fixer and the telescopic link fixer to achieve the purpose of regulating the direction of the gauge outfit of the clamp-on ammeter. The leading-in opening that is equipped with, connection rope and connecting wire can walk the line through the opening from insulating telescopic link centre.
Preferably, the operation platform comprises: the MCU is electrically connected with the storage battery, the controller, the display screen, the WIFI module, the Bluetooth module, the buzzer, the GPS module and the pre-amplification circuit; the storage battery is electrically connected with the MCU; the display screen is electrically connected with the MCU; the controller is electrically connected with the MCU; the GPS module is used for recording the location information of the detection place and is electrically connected with the MCU; the WIFI module is used for being connected with the smart phone in a WIFI mode to provide ammeter detection information for the smart phone and is electrically connected with the MCU; the Bluetooth module is used for being connected with the Bluetooth of the smart phone to provide ammeter detection information for the smart phone and is electrically connected with the MCU; and the buzzer is used for sending out a detection prompt tone and is electrically connected with the MCU. The pre-amplification circuit is used for amplifying the electric signal, is electrically connected with the electricity testing metal head and is electrically connected with the MCU;
the operating platform is provided with a display screen and a current value operator which can clearly display the detected lead and can adjust the opening and closing of the meter head of the clamp-on ammeter.
Preferably, the jaw driving motor is a synchronous motor.
Preferably, the surface of the connecting rope is coated with an insulating material. The electric shock of the operator can be prevented.
A circuit analysis method:
m1: when a worker arrives at a detection place, a long rod type clamp-on ammeter A is opened to perform frequency sweep analysis on a local WIFI frequency band, and a frequency band with the least interference is determined as the test frequency band;
m2: the long-rod clamp-on ammeter A and the long-rod clamp-on ammeter B are connected in a WIFI mode, the distance between the long-rod clamp-on ammeters is gradually increased, and the actual interference condition of the locally selected frequency band is detected;
m3: the method comprises the steps that signals with the maximum transmission distance of 50 meters and more than 50 meters in an open area of a long rod type clamp ammeter default built-in WiFi module are distorted, packet loss and communication interruption occur, and the like, the signals are calculated according to environment density in the environment with buildings or trees, the signals are attenuated by 4dB through wood materials, the signals are attenuated by 8-15dB through brick walls according to different thicknesses, the signals are attenuated by 15-30dB through reinforced concrete walls, the average effective distance is 20 meters, the same frequency interference condition exists in actual use, the actual interference dB is calculated by confirming the same frequency interference in advance, and the set distance between long rod type clamp ammeters is determined according to the actual interference dB value;
m4: setting transformer area detection points around a transformer inlet and outlet port according to a central theory distribution by taking a transformer of the transformer area as a central point;
m5: the long-rod type clamp ammeter positioned at the edge is connected to the central long-rod type clamp ammeter in a chain manner through the long-rod type clamp ammeter arranged between the long-rod type clamp ammeter and the central long-rod type clamp ammeter;
m6: the central point long rod type clamp-on ammeter is also connected with the smart phone;
m7: the long-rod clamp type ammeter is synchronously detected at each detection point, the detection time is 10s, the detected data are collected to the smart phone through chain connection, and the data are analyzed according to a preset system to obtain the power utilization trend and the electric leakage trend;
m8: performing deductive analysis on the detection points according to the first detection trend, redistributing the detection points, and repeating M7 once;
m9: and relatively accurate trend data is obtained by comparing the data of M7 and M8, and is saved and uploaded to a server.
If the interference measured in the step M2 is too large and the actual detection distance cannot be smaller than a certain value, the following substeps are used:
a1: starting a WiFi signal repeater as a transmission node to increase the communication distance of a WiFi module of the long rod type clamp-on ammeter;
a2: resetting the computing node to exclude the repeater node;
a3: if the repeater is started and WIFI signal interference cannot be eliminated, data are manually recorded and summarized to the central long-rod clamp type ammeter.
If said step M4 creates a problem that the set-up of detection points cannot be distributed because the actual location does not meet the criteria-centric theory, the following sub-steps are performed:
b1: analyzing an inlet and outlet port of the transformer in the transformer area and a connected circuit, and removing non-corresponding blocks in the standard central theory;
b2: reallocating the weight of the remaining blocks according to the size of the transmission value on the incoming/outgoing line body;
b3: the long-rod type clamp-on ammeter is distributed according to the principle of domination in the central theory.
If a problem of signaling interruption in the detection is detected, the following substeps are performed:
c1: in actual detection, due to the adoption of chain connection, the connection interruption of the long-rod type clamp ammeter close to the central point can influence the link extended by the long-rod type clamp ammeter, and the long-rod type clamp ammeter at the breakpoint of a detection signal;
c2: connecting a long rod type clamp ammeter to be measured by using a smart phone, performing prefabrication detection, replacing the long rod type clamp ammeter into a standby long rod type clamp ammeter if a hardware problem is detected, and executing C3 if a non-hardware problem is detected;
c3: erecting a wifi signal repeater between a long-rod type clamp ammeter with a signal breakpoint and a previous long-rod type clamp ammeter of the long-rod type clamp ammeter, and testing whether the signal breakpoint is recovered;
c4: if the line is recovered, the calculation node generated by the WiFi signal repeater is eliminated in the calculation process, and if the line is not recovered, the distribution position of the long-rod clamp-type ammeter of the line is rearranged.
The invention has the beneficial effects that: the telescopic length that insulating telescopic link can adjust needs wantonly, and the direction can be adjusted to the gauge outfit, and the demonstration information that the display can be clear can not receive the angle influence.
Drawings
FIG. 1 is a block diagram of the structure
FIG. 2 is a schematic view of the structure
In the figure: 1. Connecting rope, 2, insulating telescopic link, 3, insulating handle, 4, jaw type ampere meter gauge outfit, 5, connector, 6, operation platform, 7, fixed iron core, 8, movable iron core, 9, jaw driving motor, 10, reset spring, 11, bayonet gear, 12, test electric metal head, 13, induction circuit, 14, motor drive circuit, 15, gauge outfit fixer, 16, leading-in opening, 17, telescopic link fixer, 18, angle adjuster, 19, MCU, 20, bluetooth module, 21, GPS module, 22, controller, 23, preamplification circuit, 24, the battery, 25, the display screen, 26, WIFI module, 27, bee calling organ, 28, the tooth ball.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings.
Example 1
A long-rod type clamp-on ammeter comprises a connecting rope 1, an insulating telescopic rod 2 and a clamp-on ammeter head 4, wherein the bottom of the clamp-on ammeter head 4 is detachably connected with a connector 5 and is electrically connected with an operating platform 6; the top end of the connector 5 is detachably connected with the meter head 4 of the clamp-on ammeter, and the bottom end of the connector is fixedly connected with the insulating telescopic rod 2; the insulating handle 3 is sleeved with the bottom of the insulating telescopic rod 2 and is fixedly connected with the operating platform 6; and the operating platform 6 is fixedly connected with the insulating handle 3 and is electrically connected with the clamp-type ammeter head 4 through a hollow lead of the insulating telescopic rod 2.
The top section of the connecting rope 1 is provided with tooth balls 28 at equal intervals, the tooth balls are matched with the bayonet gear 11 for transmission work, the top of the connecting rope 1 is detachably connected with the fixed iron core 7, and the tail of the connecting rope 1 is fixedly connected with the insulating handle 3; the clip-on ammeter gauge outfit 4, include: the middle part of the fixed iron core 7 is hinged with the movable iron core 8, the middle part of the fixed iron core is fixedly connected with the reset spring 10, the tail part of the fixed iron core is detachably connected with the connector 5, and the tail part of the fixed iron core is detachably connected with the connecting rope 1 and is electrically connected with the induction circuit 13; the middle part of the movable iron core 8 is hinged with the fixed iron core 7, the middle part of the movable iron core is fixedly connected with a return spring 10, and the tail part of the movable iron core is fixedly connected with a jaw driving motor 9; the electricity testing metal head 12 is used for determining whether power failure equipment or a power failure lead has no voltage, is arranged at the head of the movable iron core 8, is fixedly connected with the movable iron core 8 and is electrically connected with the pre-amplification circuit 23 of the operating platform 6; the induction circuit 13 is electrically connected with the movable iron core 8, the fixed iron core 7 and the MCU19 of the operating platform 6; the reset spring 10 is fixedly connected with the fixed iron core 7 and the movable iron core 8 by resetting the position of the movable iron core 8; the bayonet gear 11 is arranged on a transmission shaft of the jaw driving motor 9 and is meshed and connected with the connecting rope 1 through the bayonet gear 11, and the jaw driving motor 9 is arranged at the tail part of the movable iron core 8 and is electrically connected with the motor driving circuit 14; and the motor driving circuit 14 is used for driving the jaw driving motor 9 and is electrically connected with the MCU19 of the operating platform 6.
Adopt tooth ball 28 and bayonet gear 11 cooperation mode control clamp-on ammeter gauge outfit 4 to open and shut, under the circumstances of normal work, drive through the bayonet gear and connect rope closed clamp-on ammeter gauge outfit 4, if the drive motor 9 of keeping silent breaks down, operating personnel can be through connecting the rope control clamp-on ammeter gauge outfit closure on insulating handle 3.
The connector 5 further includes: the meter head fixer 15 is used for fixing the meter head 4 of the clamp-on ammeter, is detachably connected with the fixed iron core 7 of the meter head 4 of the clamp-on ammeter, and is fixedly connected with the angle regulator 18; an introduction opening 16 is formed in the telescopic rod holder 17, the introduction opening 16 is used for introducing a connecting wire and the connecting rope 1, and the connecting rope is mounted on the telescopic rod holder 17; the telescopic rod fixer 17 is used for fixing the connector 5 and the insulating telescopic rod 2, is fixedly connected with the angle adjuster 18, is sleeved with the insulating telescopic rod 2 and is fixedly connected with the insulating telescopic rod 2 through bolts; and the angle regulator 18 is used for regulating the direction of the meter head 4 of the clamp-on ammeter, is fixedly connected with the meter head fixer 15 and is fixedly connected with the telescopic rod fixer 17.
The watch head fixer 15 is detachably connected with the tail part of the fixed iron core 7 through screw connection. The angle regulator 18 can regulate the angle between the meter head fixer 15 and the telescopic rod fixer 17 to achieve the purpose of regulating the direction of the meter head 4 of the clamp-on ammeter. The leading-in opening 16 is arranged, and the connecting rope 1 and the connecting lead can be routed from the middle of the insulating telescopic rod 2 through the opening.
The operation platform 6 comprises: the MCU19 is electrically connected with the storage battery 24, the controller 22, the display screen 25, the WIFI module 26, the Bluetooth module 20, the buzzer 27, the GPS module 21 and the pre-amplification circuit 23; the storage battery 24 is electrically connected with the MCU 19; the display screen 25 is electrically connected with the MCU 19; the controller 22 is electrically connected with the MCU 19; the GPS module 21 is used for recording the location information of the detection place and is electrically connected with the MCU 19; the WIFI module 26 is used for being connected with a smart phone in a WIFI mode to provide ammeter detection information for the smart phone, and is electrically connected with the MCU 19; the Bluetooth module 20 is used for being connected with a smart phone in a Bluetooth mode to provide ammeter detection information for the smart phone and is electrically connected with the MCU 19; the buzzer 27 is used for sending out detection prompt tones and is electrically connected with the MCU 19. The preamplification circuit 23 is used for amplifying electric signals, is electrically connected with the electricity testing metal head 12 and is electrically connected with the MCU 19. The jaw driving motor 9 adopts a synchronous motor. The surface of the connecting rope 1 is coated with insulating materials.
A circuit analysis method:
m1: when a worker arrives at a detection place, a long rod type clamp-on ammeter A is opened to perform frequency sweep analysis on a local WIFI frequency band, and a frequency band with the least interference is determined as the test frequency band;
m2: the long-rod clamp-on ammeter A and the long-rod clamp-on ammeter B are connected in a WIFI mode, the distance between the long-rod clamp-on ammeters is gradually increased, and the actual interference condition of the locally selected frequency band is detected;
m3: the method comprises the steps that signals with the maximum transmission distance of 50 meters and more than 50 meters in an open area of a long rod type clamp ammeter default built-in WiFi module are distorted, packet loss and communication interruption occur, and the like, the signals are calculated according to environment density in the environment with buildings or trees, the signals are attenuated by 4dB through wood materials, the signals are attenuated by 8-15dB through brick walls according to different thicknesses, the signals are attenuated by 15-30dB through reinforced concrete walls, the average effective distance is 20 meters, the same frequency interference condition exists in actual use, the actual interference dB is calculated by confirming the same frequency interference in advance, and the set distance between long rod type clamp ammeters is determined according to the actual interference dB value;
m4: setting transformer area detection points around a transformer inlet and outlet port according to a central theory distribution by taking a transformer of the transformer area as a central point;
m5: the long-rod type clamp ammeter positioned at the edge is connected to the central long-rod type clamp ammeter in a chain manner through the long-rod type clamp ammeter arranged between the long-rod type clamp ammeter and the central long-rod type clamp ammeter;
m6: the central point long rod type clamp-on ammeter is also connected with the smart phone;
m7: the long-rod clamp type ammeter is synchronously detected at each detection point, the detection time is 10s, the detected data are collected to the smart phone through chain connection, and the data are analyzed according to a preset system to obtain the power utilization trend and the electric leakage trend;
m8: performing deductive analysis on the detection points according to the first detection trend, redistributing the detection points, and repeating M7 once;
m9: and relatively accurate trend data is obtained by comparing the data of M7 and M8, and is saved and uploaded to a server.
If the interference measured in the step M2 is too large and the actual detection distance cannot be smaller than a certain value, the following substeps are used:
a1: starting a WiFi signal repeater as a transmission node to increase the communication distance of a WiFi module of the long rod type clamp-on ammeter;
a2: resetting the computing node to exclude the repeater node;
a3: if the repeater is started and WIFI signal interference cannot be eliminated, data are manually recorded and summarized to the central long-rod clamp type ammeter.
If said step M4 creates a problem that the set-up of detection points cannot be distributed because the actual location does not meet the criteria-centric theory, the following sub-steps are performed:
b1: analyzing an inlet and outlet port of the transformer in the transformer area and a connected circuit, and removing non-corresponding blocks in the standard central theory;
b2: reallocating the weight of the remaining blocks according to the size of the transmission value on the incoming/outgoing line body;
b3: the long-rod type clamp-on ammeter is distributed according to the principle of domination in the central theory.
If a problem of signaling interruption in the detection is detected, the following substeps are performed:
c1: in actual detection, due to the adoption of chain connection, the connection interruption of the long-rod type clamp ammeter close to the central point can influence the link extended by the long-rod type clamp ammeter, and the long-rod type clamp ammeter at the breakpoint of a detection signal;
c2: connecting a long rod type clamp ammeter to be measured by using a smart phone, performing prefabrication detection, replacing the long rod type clamp ammeter into a standby long rod type clamp ammeter if a hardware problem is detected, and executing C3 if a non-hardware problem is detected;
c3: erecting a wifi signal repeater between a long-rod type clamp ammeter with a signal breakpoint and a previous long-rod type clamp ammeter of the long-rod type clamp ammeter, and testing whether the signal breakpoint is recovered;
c4: if the line is recovered, the calculation node generated by the WiFi signal repeater is eliminated in the calculation process, and if the line is not recovered, the distribution position of the long-rod clamp-type ammeter of the line is rearranged.
Example 2
The embodiment is basically the same as the embodiment 1, except that a WiFi module used in the embodiment is directly connected with a smart phone, and each long rod type clamp ammeter is directly connected with the smart phone of the holder via WiFi;
meanwhile, the mobile phone connected with the long-rod clamp-type ammeter through WiFi is also connected to the same server through a 4G network;
in the detection process, data detected by the long rod type clamp ammeter are sent to the smart phone through the WiFi module, the smart phone sends the data to the server through the 4G mobile phone, and the server calculates the power utilization trend or the electric leakage trend through summarized data and stores the power utilization trend or the electric leakage trend and sends the power utilization trend or the electric leakage trend to the smart phone in the network.
Claims (4)
1. A circuit analysis method is suitable for a long rod type clamp ammeter, the long rod type clamp ammeter comprises a connecting rope and an insulating telescopic rod, and the circuit analysis method further comprises the following steps:
the bottom of the meter head of the clamp-on ammeter is detachably connected with the connector and is electrically connected with the operating platform;
the connector is detachably connected with the meter head of the clamp-on ammeter and is fixedly connected with the insulating telescopic rod;
the insulating handle is sleeved with the bottom of the insulating telescopic rod and is fixedly connected with the operating platform;
the operation platform is fixedly connected with the insulating handle and is electrically connected with the meter head of the clamp-type ammeter through a hollow lead of the insulating telescopic rod;
the top section of the connecting rope is provided with tooth balls at equal intervals, the tooth balls are matched with the bayonet gears for transmission work, the top of the connecting rope is detachably connected with the fixed iron core, and the tail of the connecting rope is fixedly connected with the insulating handle;
the clip-on ammeter gauge outfit, include:
the middle part of the fixed iron core is hinged with the movable iron core, the middle part of the fixed iron core is fixedly connected with the reset spring, the tail part of the fixed iron core is detachably connected with the connector, and the tail part of the fixed iron core is detachably connected with the connecting rope and is electrically connected with the induction circuit;
the middle part of the movable iron core is hinged with the fixed iron core, the middle part of the movable iron core is fixedly connected with the reset spring, and the tail part of the movable iron core is fixedly connected with the jaw driving motor;
the electricity testing metal head is used for determining whether power failure equipment or a power failure lead has no voltage, is arranged at the head part of the movable iron core, is fixedly connected with the movable iron core and is electrically connected with the operating platform;
the induction circuit is electrically connected with the movable iron core, the fixed iron core and the operation platform;
the reset spring is used for resetting the position of the movable iron core, is fixedly connected with the fixed iron core and is fixedly connected with the movable iron core;
the bayonet gear is arranged on the transmission shaft of the jaw driving motor and is meshed and connected with the connecting rope through a tooth ball;
the jaw driving motor is arranged at the tail part of the movable iron core and is electrically connected with a motor driving circuit;
the motor driving circuit is used for driving the jaw driving motor and is electrically connected with the operating platform;
the connector, still include:
the meter head fixer is used for fixing the meter head of the clamp-on ammeter, is detachably connected with the meter head of the clamp-on ammeter and is fixedly connected with the angle regulator;
the telescopic rod fixer is provided with an inlet opening for leading in a connecting wire and a connecting rope, and the connecting rope is arranged on the telescopic rod fixer;
the telescopic rod fixer is used for fixing the connector and the insulating telescopic rod, is fixedly connected with the angle regulator, is sleeved with the insulating telescopic rod and is fixedly connected with the insulating telescopic rod through a bolt;
the angle regulator is used for regulating the direction of the meter head of the clamp-on ammeter, is fixedly connected with the meter head fixer and is fixedly connected with the telescopic rod fixer;
the method is characterized in that:
m1: when a worker arrives at a detection place, a long rod type clamp-on ammeter A is opened to perform frequency sweep analysis on a local WIFI frequency band, and a frequency band with the least interference is determined as the test frequency band;
m2: the long-rod clamp-on ammeter A and the long-rod clamp-on ammeter B are connected in a WIFI mode, the distance between the long-rod clamp-on ammeters is gradually increased, and the actual interference condition of the locally selected frequency band is detected;
m3: the maximum transmission distance of a built-in WiFi module of a long rod type clamp ammeter in an open area is defaulted to be 50 meters, the problem of packet loss and communication interruption can occur due to distortion when the signal exceeds 50 meters, the signal is calculated according to the environmental density in the environment with buildings or trees, the signal is attenuated by 4dB through a wood material, the signal is attenuated by 8-15dB according to different thicknesses through a brick wall, the signal is attenuated by 15-30dB through a reinforced concrete wall, the average effective distance is 20 meters, the condition of same-frequency interference exists in actual use, the actual interference dB is calculated by confirming the size of the same-frequency interference in advance, and the set distance between the long rod type clamp ammeters is determined according to the dB value of the actual interference;
m4: setting transformer area detection points around a transformer inlet and outlet port according to a central theory distribution by taking a transformer of the transformer area as a central point;
m5: the long-rod type clamp ammeter positioned at the edge is connected to the central long-rod type clamp ammeter in a chain manner through the long-rod type clamp ammeter arranged between the long-rod type clamp ammeter and the central long-rod type clamp ammeter;
m6: the central point long rod type clamp-on ammeter is also connected with the smart phone;
m7: the long-rod clamp type ammeter is synchronously detected at each detection point, the detection time is 10s, the detected data are collected to the smart phone through chain connection, and the data are analyzed according to a preset system to obtain the power utilization trend and the electric leakage trend;
m8: performing deductive analysis on the detection points according to the first detection trend, redistributing the detection points, and repeating M7 once;
m9: relatively accurate trend data is obtained by comparing the data of M7 and M8, and is stored and uploaded to a server;
if the interference measured in the step M2 is too large and the actual detection distance cannot be smaller than a certain value, the following substeps are used:
a1: starting a WiFi signal repeater as a transmission node to increase the communication distance of a WiFi module of the long rod type clamp-on ammeter;
a2: resetting the computing node to exclude the repeater node;
a3: if the repeater is started and WIFI signal interference cannot be eliminated, manually recording data and summarizing the data to a central point long-rod clamp type ammeter;
if said step M4 creates a problem that the set-up of detection points cannot be distributed because the actual location does not meet the criteria-centric theory, the following sub-steps are performed:
b1: analyzing an inlet and outlet port of the transformer in the transformer area and a connected circuit, and removing non-corresponding blocks in the standard central theory;
b2: reallocating the weight of the remaining blocks according to the size of the transmission value on the incoming/outgoing line body;
b3: distributing a long rod type clamp-on ammeter according to a domination principle in a central theory;
if a problem of signaling interruption in the detection is detected, the following substeps are performed:
c1: in actual detection, due to the adoption of chain connection, the connection interruption of the long-rod type clamp ammeter close to the central point can influence the link extended by the long-rod type clamp ammeter, and the long-rod type clamp ammeter at the breakpoint of a detection signal;
c2: connecting a long rod type clamp ammeter to be measured by using a smart phone, performing prefabrication detection, replacing the long rod type clamp ammeter into a standby long rod type clamp ammeter if a hardware problem is detected, and executing C3 if a non-hardware problem is detected;
c3: a WiFi signal repeater is erected between the long-rod clamp ammeter with the signal breakpoint and the previous long-rod clamp ammeter of the long-rod clamp ammeter, and whether the signal breakpoint is recovered or not is tested;
c4: if the line is recovered, the calculation node generated by the WiFi signal repeater is eliminated in the calculation process, and if the line is not recovered, the distribution position of the long-rod clamp-type ammeter of the line is rearranged.
2. A circuit analysis method according to claim 1, wherein said operating platform comprises:
the MCU is electrically connected with the storage battery, the controller, the display screen, the WIFI module, the Bluetooth module, the buzzer, the GPS module and the pre-amplification circuit;
the storage battery is electrically connected with the MCU;
the display screen is electrically connected with the MCU;
the controller is electrically connected with the MCU;
the GPS module is used for recording the location information of the detection place and is electrically connected with the MCU;
the WIFI module is used for being connected with the smart phone in a WIFI mode to provide ammeter detection information for the smart phone and is electrically connected with the MCU;
the Bluetooth module is used for being connected with the Bluetooth of the smart phone to provide ammeter detection information for the smart phone and is electrically connected with the MCU;
the buzzer is used for sending out a detection prompt tone and is electrically connected with the MCU;
and the pre-amplification circuit is used for amplifying the electric signal, is electrically connected with the electricity testing metal head and is electrically connected with the MCU.
3. A circuit analysis method according to claim 1, wherein said jaw drive motor is a synchronous motor.
4. A circuit analysis method according to claim 1, wherein the surface of said connecting cord is coated with an insulating layer.
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| CN108508305A (en) * | 2018-04-28 | 2018-09-07 | 广东电网有限责任公司 | A kind of power utility check device |
| CN109709376A (en) * | 2019-03-20 | 2019-05-03 | 广东电网有限责任公司 | A kind of novel clamp current measuring device |
| CN116626346B (en) * | 2023-07-24 | 2023-10-13 | 山东金科电气股份有限公司 | High-low voltage power distribution cabinet load detection device and application method thereof |
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