Hand-held overhead line type live detection device

Abstract

The invention belongs to the field of live-line detection, and relates to a handheld overhead line model live-line detection device, which comprises a test terminal, a handheld control display end, an insulating rod, a detection module main control chip, an eddy current sensor, a laser diameter measurement module, a communication chip and a switch control chip, and the handheld control display end main control chip is respectively connected with the communication chip, the switch control chip and the data storage module. According to the invention, the eddy current sensor in the test terminal detection module generates oscillating current and captures the change of the Q value of the coil so as to accurately distinguish different materials and determine the material of the to-be-measured wire, and the laser diameter measurement module rapidly identifies the diameter of the to-be-measured wire. And then the handheld control display end compares the received material and diameter data of the to-be-detected wire with the wire information base of the data storage module to obtain the model of the wire and display the model on the handheld control display end, so that the detection is convenient and rapid, the operation burden is reduced, and the measurement error is avoided.

Description

Technical Field

[0001] The invention belongs to the field of live detection and relates to a handheld overhead line model live detection device. Background Art

[0002] Theoretical line loss is the percentage of theoretical loss calculated based on the basic data of operating equipment and lines. It can assist in determining the operating economy of the main network and distribution network structure, discover weak structures in the grid, and determine technical loss reduction goals and measures. The accuracy of its calculation mainly depends on the accuracy of the ledger data.

[0003] However, in actual work, it was found that the distribution network overhead lines are numerous and widespread, and the basic records of many lines that were put into operation earlier were incomplete. In addition, since the specifications of similar overhead lines are slightly different, it is difficult to accurately identify them by the naked eye at long distances, resulting in low accuracy of basic lines, which has a great impact on the calculation of theoretical line losses.

[0004] Through the investigation of the theoretical line loss calculation process, it is found that the line parameters that need to be determined to determine the conductor model include the conductor diameter and material. Through literature search and manufacturer consultation, it is known that the current research on "line identification" mainly focuses on "cable path identification", "cable fault location" and "line parameter testing", and lacks research on basic data detection of lines under power.

[0005] Chinese patent CN114413819A discloses a 10 kV overhead line live measurement tool, including: a main structure, a clamping assembly, a measuring assembly and a hand-held assembly. The main structure is used to form the basis of the 10 kV overhead line live measurement tool; the clamping assembly is used to clamp the live cables in the overhead line; the measuring assembly is used to test the diameter of the live cables; and the hand-held assembly is used by workers to operate the 10 kV overhead line live measurement tool for handheld use.

[0006] However, this patent determines the number of turns of the gear based on the gear detected in the measuring component, and then calculates the distance the box moves along the long side of the L-shaped guide rail based on the number of turns to determine the measured diameter data of the live cable. This operation method is very prone to errors and can only obtain the diameter data of the live cable, but cannot determine the model of the live cable. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a handheld overhead line model live detection device which is convenient and fast to detect, is not prone to errors, and can directly display the model of the conductor to be tested.

[0008] The technical solution adopted by the present invention to solve the technical problem is:

[0009] The present invention provides a handheld overhead line model live detection device, comprising: a test terminal, a handheld control display terminal, and an insulating rod. A detection module is installed inside the test terminal, and the detection module comprises a detection module main control chip, an eddy current sensor, a laser diameter measurement module, a communication chip, and a switch control chip. The detection module main control chip is respectively connected to the eddy current sensor, the laser diameter measurement module, the communication chip, and the switch control chip. The eddy current sensor is not only responsible for generating an oscillating current, but also responsible for capturing the change in the coil Q value, and converting it into a change in a voltage signal through a detection and amplification process. The detection module main control chip compares the voltage signal and processes it with filtering technology, and according to the feedback voltage value, realizes accurate distinction between different materials and determines the material of the conductor to be tested; the laser diameter measurement The module quickly identifies the diameter of the wire to be tested, and the material and diameter data of the wire to be tested are transmitted to the handheld control display terminal through the communication chip of the detection module; the handheld control display terminal includes a handheld control display terminal main control chip, a communication chip, a switch control chip, and a data storage module. The handheld control display terminal main control chip is respectively connected to the communication chip, the switch control chip, and the data storage module. The communication chip of the handheld control display terminal exchanges information with the communication chip of the detection module. The handheld control display terminal main control chip receives the signal of the communication chip of the handheld control display terminal, and sends a control instruction, which is compared with the wire information library of the data storage module in the handheld control display terminal to obtain the model of the wire to be tested, and is displayed on the display screen of the handheld control display terminal; the insulating rod is installed on the test terminal.

[0010] Furthermore, the main control chip of the detection module and the main control chip of the handheld control display terminal are of STM32 type.

[0011] Furthermore, the test terminal has an overhead line contact surface, and the overhead line contact surface has an arc-shaped notch, and the arc-shaped notch is used to fit the conductor to be tested of the overhead line.

[0012] Furthermore, the insulating rod is installed on a side opposite to the overhead line contact surface of the test terminal.

[0013] Furthermore, an insulating rod fixing bracket is installed on the side opposite to the overhead line contact surface of the test terminal, and the insulating rod fixing bracket has a cross groove for horizontally or vertically installing the insulating rod.

[0014] Furthermore, the insulating rod and the insulating rod fixing base of the test terminal are fixed by a fixing clip.

[0015] Furthermore, a working switch and a working status indicator light are installed on the surface adjacent to the overhead line contact surface of the test terminal, and both the working switch and the working status indicator light are connected to the switch control chip of the detection module.

[0016] The advantages and positive effects of the present invention are:

[0017] The present invention generates an oscillating current and captures the change of the coil Q value through the eddy current sensor in the test terminal detection module, thereby accurately distinguishing different materials, determining the material of the wire to be tested, and quickly identifying the wire diameter by the laser diameter measurement module. Then, the handheld control display terminal compares the received material and diameter data of the wire to be tested with the wire information library of the data storage module to obtain the wire model and display it on the handheld control display terminal. The detection is convenient and fast, the operating burden is reduced, the measurement error is avoided, and the work efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a circuit diagram of a handheld overhead line model live detection device for this application;

[0019] Figure 2 A circuit diagram of the eddy current sensor of this application;

[0020] Figure 3 This is a working response diagram of the test terminal and the handheld control display terminal for this application;

[0021] Figure 4 A schematic diagram of the detection of an insulating rod installed on the handheld test terminal of this application;

[0022] Figure 5 This is a three-dimensional structural diagram of the test terminal for this application at a first viewing angle;

[0023] Figure 6 This is a three-dimensional structural diagram of the test terminal of this application at a second viewing angle.

[0024] The above drawings include the following reference numerals:

[0025] 1-test terminal; 11-overhead line contact surface; 12-arc notch; 2-handheld control display terminal; 3-conductor to be tested; 4-insulating rod; 5-insulating rod fixing base; 51-cross groove; 6-fixing clip; 7-working switch; 8-working status indicator light. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0027] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] like Figure 1-Figure 6 As shown, the present invention provides a handheld overhead line model live detection device, comprising: a test terminal 1, a handheld control display terminal 2, and an insulating rod 4.

[0029] like Figure 1 As shown, the test terminal 1 is internally installed with a detection module, and the detection module includes a detection module main control chip, an eddy current sensor, a laser diameter measurement module, a communication chip, and a switch control chip. The detection module main control chip is respectively connected to the eddy current sensor, the laser diameter measurement module, the communication chip, and the switch control chip. Among them, the model of the detection module main control chip is STM32. The core components of the working system of the eddy current sensor include the object to be measured, the probe, the extension cable and the preamplifier. The preamplifier is responsible for generating a high-frequency oscillating current, which will generate an axial magnetic field when passing through the probe coil, and then induce eddy currents in nearby metal objects. When different types of metals approach this magnetic field, eddy currents will be excited on their surfaces, thereby causing changes in the Q value of the probe coil. During the detection process, the eddy current sensor is not only responsible for generating an oscillating current, but also for capturing changes in the coil Q value, and converting it into a change in a voltage signal through the detection and amplification process. The laser diameter measurement module quickly identifies the diameter of the conductor 3 to be measured, and the material and diameter data of the conductor 3 to be measured are transmitted to the handheld control display terminal 2 through the communication chip. Specifically, the laser diameter measurement module adopts the point cloud laser imaging principle, installs laser signal transmitters and collectors on the contact surface of the overhead line, and uses the laser triangulation reflection principle to collect the two-dimensional contour information of the conductor surface. The highly sensitive photosensitive element CMOS matrix can receive the light reflected from the object being measured to form a high-contour image, and then obtain the diameter information of the conductor.

[0030] like Figure 2As shown, the eddy current sensor includes a resistor R1, a resistor R2, a resistor R3, a sliding rheostat R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a transistor Q1, an inductor L1, an operational amplifier UIA, and an adjustable resistance resistor P1; pin No. 1 of the operational amplifier UIA is respectively connected to the resistor R3 and the resistor R5, pin No. 2 of the operational amplifier UIA is respectively connected to the resistor R2 and the emitter of the transistor Q1, pin No. 3 of the operational amplifier UIA is respectively connected to the resistor R1 and the resistor R6, pin No. 4 of the operational amplifier UIA is grounded, pin No. 8 of the operational amplifier UIA is connected to the power supply VCC, and the resistor The other end of R3 is respectively connected to the base of transistor Q1 and capacitor C3; the other end of capacitor C3 is respectively connected to the other end of resistor R1, capacitor C1, adjustable resistance resistor P1, capacitor C4, and power supply VCC; the other end of capacitor C1 is respectively connected to capacitor C2, the other end of resistor R2, and inductor L1; the other end of capacitor C2 is respectively connected to the other end of adjustable resistance resistor P1, the other end of capacitor C4, and the negative electrode of diode D1; the other end of inductor L1 is connected to one end of sliding rheostat R4; the other end of sliding rheostat R4 and its slider are grounded; the positive electrode of diode D1 is connected to the collector of transistor Q1; the other end of resistor R5 and the other end of resistor R6 are both grounded.

[0031] like Figure 3-Figure 5 As shown, in order to quickly locate the conductor 3 to be tested and effectively detect the conductor 3 to be tested, the test terminal 1 has an overhead line contact surface 11, and the overhead line contact surface 11 has an arc-shaped notch 12. The arc-shaped notch 12 is used to fit the conductor 3 to be tested of the overhead line, and fits tightly with the conductor 3 to be tested of the overhead line, which is beneficial to improving the detection efficiency and obtaining an accurate conductor model.

[0032] like Figure 4 As shown, the insulating rod 4 is installed on the test terminal 1. The handheld overhead line model live detection device of the present invention can detect the insulating rod 4 installed on the handheld test terminal 1 and the conductor 3 to be tested of the overhead line. The insulating rod 4 is a glass fiber reinforced plastic epoxy resin buckle insulating rod. The number of overlapping sections of the insulating rod can be selected according to different working heights to assist in the operation. The test terminal 1 is a small-volume device that can be installed on the insulating rod 4. Figure 5-Figure 6As shown, the insulating rod 4 is installed on the side opposite to the overhead line contact surface 11 of the test terminal 1. In a specific embodiment, an insulating rod fixing base 5 is installed on the side opposite to the overhead line contact surface 11 of the test terminal 1, and the insulating rod fixing base 5 has a cross groove 51 for horizontal or vertical installation of the insulating rod 4. The horizontal or vertical installation facilitates the adjustment of the test angle with the conductor 3 to be tested of the overhead line. The insulating rod 4 is fixed to the insulating rod fixing base 5 of the test terminal 1 by a fixing clip 6. In addition, a working switch 7 and a working status indicator light 8 are installed on the adjacent surface of the overhead line contact surface 11 of the test terminal 1, and the working switch 7 and the working status indicator light 8 are both connected to the switch control chip of the detection module.

[0033] like Figure 1-Figure 6 As shown, the handheld control display terminal 2 includes a handheld control display terminal main control chip, a communication chip, a switch control chip, and a data storage module. The handheld control display terminal main control chip is connected to the communication chip, the switch control chip, and the data storage module respectively. The communication chip of the handheld control display terminal 2 interacts with the communication chip of the detection module. The handheld control display terminal main control chip receives the signal of the communication chip of the handheld control display terminal 2, and sends a control instruction, which is compared with the wire information library of the data storage module in the handheld control display terminal 2 to obtain the model of the wire 3 to be tested, and is displayed on the display screen of the handheld control display terminal 2. Among them, the model of the handheld control display terminal main control chip is STM32. The handheld control display terminal 2 facilitates the remote control test terminal 1 to perform detection and testing work, and at the same time receives the detection results sent back by the test terminal 1 and displays them.

[0034] The method of using the handheld overhead line model live detection device of the present invention is as follows:

[0035] Before measurement, the operator selects a suitable insulating rod 4 according to the height of the conductor to be tested, connects and clamps the top of the insulating rod 4 to the remote test terminal 1. After the test terminal 1 is turned on, it enters the self-test stage. After the self-test is completed, the green indicator light of the working status indicator 8 lights up, and the operator pre-tests the test terminal 1. The pre-test reference line is the LJ-240 insulated conductor. The operator needs to place the pre-test reference line on the overhead line contact surface 11 of the test terminal 1, start the test button of the working switch 7, and the handheld display terminal 2 will display the diameter, material and corresponding model of the pre-test reference line respectively. If the diameter and material are found to be inconsistent with the reference conductor information, the parameter information should be manually calibrated. After three pre-measurements, preparations for formal testing begin.

[0036] During the test, the operator places the remote test terminal 1 at a suitable position close to the conductor 3 to be tested. Before the formal test begins, the test terminal 1 is in a non-working state, and collisions with surrounding objects should be avoided during movement. After arriving at the designated measurement position, the ground operator remotely controls the measurement status of the test terminal 1 through the handheld display terminal 2. To ensure the measurement accuracy, 3-5 measurement points should be selected on the same line as much as possible for testing. When the difference in multi-point measurement is large, the number of measurement points should be increased to avoid deformation and damage caused by the long operation time of the conductor, which affects the accuracy of the measurement data. When the measurement data error is too large and irregular, the device should be recalibrated.

[0037] After the test, the operator will recycle the remote test terminal 1 into the tool box, and the measurement data can be exported through the external interface of the handheld display terminal 2. When not in use for a long time, the built-in batteries of the remote test terminal 1 and the handheld display terminal 2 should be removed and stored separately, and dedicated personnel should be arranged to regularly maintain the terminal database.

[0038] The present invention generates an oscillating current and captures the change of the coil Q value through the eddy current sensor in the detection module of the test terminal 1, thereby accurately distinguishing different materials, determining the material of the conductor 3 to be tested, and quickly identifying the diameter of the conductor 3 to be tested by the laser diameter measurement module. Then, the handheld control display terminal 2 compares the received material and diameter data of the conductor 3 to be tested with the conductor information library of the data storage module to obtain the conductor model and display it on the handheld control display terminal 2. The detection is convenient and fast, the operating burden is reduced, the measurement error is avoided, and the work efficiency is greatly improved.

[0039] On the one hand, the handheld overhead line model live detection device of the present invention can be used in the distribution network ledger verification, and can realize the remote detection of distribution network overhead line parameters without power outage, greatly improving the accuracy of the basic ledger of the distribution network overhead line, providing a data basis for the theoretical line loss calculation, and providing reliable support for energy saving and loss reduction, and economic operation of the distribution network. On the other hand, it can be applied to the acceptance stage of the distribution network project. During the acceptance process, it can effectively verify the consistency of the conductor model with the engineering construction plan, constrain the behavior of the construction team, avoid problems such as shoddy work and cutting corners, and effectively improve the safe operation level of the distribution network. The present invention effectively combines advanced technology with actual needs, solves the problems of inaccurate distribution network old overhead line ledgers and difficult line model acceptance, effectively improves the basic management level of the distribution network, and promotes the evolution and upgrading of live detection tools.

[0040] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept, which all belong to the protection scope of the present invention.

Claims

1. A handheld overhead line model live detection device, characterized in that: include: A test terminal (1), wherein a detection module is installed inside the test terminal (1), and the detection module comprises a detection module main control chip, an eddy current sensor, a laser diameter measurement module, a communication chip, and a switch control chip. The detection module main control chip is connected to the eddy current sensor, the laser diameter measurement module, the communication chip, and the switch control chip respectively. The eddy current sensor is responsible for not only generating an oscillating current, but also for capturing changes in the coil Q value, and converting it into changes in a voltage signal through a detection and amplification process. The detection module main control chip compares the voltage signal and processes it using filtering technology, and according to the feedback voltage value, realizes accurate distinction between different materials and determines the material of the wire to be tested (3); the laser diameter measurement module quickly identifies the diameter of the wire to be tested (3), and the material and diameter data of the wire to be tested (3) are transmitted to the handheld control display terminal (2) through the communication chip of the detection module; A handheld control display terminal (2), the handheld control display terminal (2) comprising a handheld control display terminal main control chip, a communication chip, a switch control chip, and a data storage module, the handheld control display terminal main control chip being connected to the communication chip, the switch control chip, and the data storage module respectively, the communication chip of the handheld control display terminal (2) and the communication chip of the detection module performing information exchange, the handheld control display terminal main control chip receiving a signal from the communication chip of the handheld control display terminal (2), and sending a control instruction, comparing the signal with the wire information library of the data storage module in the handheld control display terminal (2), obtaining the model of the wire to be tested (3), and displaying the model on the display screen of the handheld control display terminal (2); An insulating rod (4), wherein the insulating rod (4) is mounted on the test terminal (1).

2. The handheld overhead line type live detection device according to claim 1 is characterized in that: The main control chip of the detection module and the main control chip of the handheld control display terminal are of STM32 type.

3. The handheld overhead line type live detection device according to claim 2 is characterized in that: The test terminal (1) has an overhead line contact surface (11), the overhead line contact surface (11) has an arc-shaped notch (12), and the arc-shaped notch (12) is used to fit the conductor (3) to be tested of the overhead line.

4. The handheld overhead line type live detection device according to claim 3 is characterized in that: The insulating rod (4) is installed on the side opposite to the overhead line contact surface (11) of the test terminal (1).

5. The handheld overhead line type live detection device according to claim 4 is characterized in that: An insulating rod fixing bracket (5) is installed on the side opposite to the overhead line contact surface (11) of the test terminal (1), and the insulating rod fixing bracket (5) has a cross groove (51) for horizontally or vertically installing the insulating rod (4).

6. The handheld overhead line model live detection device according to claim 5 is characterized in that: The insulating rod (4) is fixed to the insulating rod fixing base (5) of the test terminal (1) via a fixing clip (6).

7. The handheld overhead line type live detection device according to claim 6 is characterized in that: A working switch (7) and a working status indicator light (8) are installed on the surface adjacent to the overhead line contact surface (11) of the test terminal (1), and the working switch (7) and the working status indicator light (8) are both connected to the switch control chip of the detection module.

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