Novel multipoint loop resistance tester

Abstract

The invention discloses a novel multipoint loop resistance tester, which relates to the technical field of loop resistance measurement, is used for measuring a loop circuit of equipment to be tested, and comprises a main tester, a handheld data checking instrument and a plurality of wireless sampling mechanisms, the wireless sampling mechanism is wirelessly connected with the main tester through the wireless transmission device, is clamped at a test point of the equipment to be tested, and is used for acquiring current and voltage information of the test point and wirelessly transmitting the current and voltage information to the main tester, so that the troubles of movement, wiring and wire replacement of the test instrument are effectively avoided, and the test efficiency is improved. The influence of external electromagnetic interference on a test result is reduced, the handheld data checking instrument is wirelessly connected with the main tester and is used for acquiring current and voltage information of the to-be-tested equipment from the main tester, workers do not need to frequently go back and forth between a test point and the loop resistance tester, and the working efficiency is improved. The technical problems of low multi-loop resistance test efficiency and unstable test result in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of loop resistance measurement, and in particular to a novel multi-point loop resistance tester. Background Art

[0002] During the operation and maintenance of power equipment, the size of the equipment's contact resistance or loop resistance plays a vital role in the safe operation of the equipment. Excessive contact resistance will lead to increased heat generation, which may cause equipment failure or safety accidents. Therefore, accurate and rapid measurement of contact resistance or loop resistance is one of the important links to ensure the safe and reliable operation of power equipment.

[0003] However, traditional loop resistance testers usually use manual contact and wired transmission technology. When conducting multi-loop tests, each loop needs to be connected and measured in turn, and the test instrument needs to be moved, resulting in a long test time. Especially in maintenance work, it involves testing multiple equipment bodies or a conductive terminal block at a time, which is inefficient. Moreover, maintenance personnel are required to frequently travel back and forth between the measurement point and the loop resistance tester to view the data, further reducing the maintenance efficiency and failing to meet the requirements of modern power systems for fast and efficient detection. At the same time, wired transmission relies on cables. In complex field environments, wiring and replacement are troublesome, and when the cables are long, they are susceptible to external electromagnetic interference, resulting in unstable test results. Summary of the invention

[0004] In view of the above shortcomings, the present invention provides a novel multi-point loop resistance tester, which can solve the technical problem that the loop resistance tester in the prior art can only use manual contact and wired transmission methods to test the resistance of multiple loops, resulting in low efficiency of multi-loop resistance testing and unstable test results. The specific technical solution is as follows:

[0005] A novel multi-point loop resistance tester, comprising a main tester, a wireless sampling mechanism and a handheld data viewer;

[0006] The main tester is used to provide a test current to the device under test;

[0007] The wireless sampling mechanism is wirelessly connected to the main tester via a wireless transmission device, and is used to collect current and voltage information on the device under test, and transmit the current and voltage information to the main tester;

[0008] The handheld data viewer is wirelessly connected to the main tester and is used to obtain the current and voltage information of the device under test from the main tester.

[0009] Preferably, the main tester includes an equipment box and a display screen, a power module, an output circuit, a control module and a wireless transceiver module arranged on the equipment box, the power module is electrically connected to the output circuit, the output circuit is connected to the device under test to transmit the test current, and the display screen, power module, output circuit and the wireless transceiver module are all electrically connected to the control module.

[0010] Preferably, the power supply module includes a power supply and a power supply output power control module, the power supply is electrically connected to the power supply output power control module, and the power supply output power control module is electrically connected to the output circuit and the control module.

[0011] Preferably, the power module includes a power charging port, and the power charging port is arranged on the surface of the equipment box and is electrically connected to the power source.

[0012] Preferably, the output circuit includes a constant current source and an output terminal, the input end of the constant current source is connected to the output end of the power supply module, the output end of the constant current source is connected to the output terminal, and the control end of the constant current source is electrically connected to the control module. When in use, the output terminal is connected to the device under test to output a test current.

[0013] Preferably, an operation button is provided on the equipment box, and the operation button is electrically connected to the control module.

[0014] Preferably, a printer is provided on the equipment box, and the printer is electrically connected to the control module and the power module.

[0015] Preferably, a switch button is provided on the equipment box, the input end of the switch button is connected to the output end of the power supply, the output end of the switch button is connected to the input end of the power supply output power control module, and the switch button is used to control the opening and closing of the main tester.

[0016] Preferably, the main tester is provided with a data storage module, and the data storage module is electrically connected to the control module.

[0017] Preferably, the wireless sampling mechanism includes a sampling clamp, a wiring head and a cable, the sampling clamp is used to clamp the test point on the device to be tested, a sensor for collecting current and voltage is arranged inside the sampling clamp, the wiring head is installed on the sampling clamp, one end of the wiring head is connected to the sensor, and the other end is connected to the cable, the other end of the cable is connected to a wireless transmission device, and the wireless transmission device is wirelessly connected to the main tester.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a novel multi-point loop resistance tester, which provides a test current to a device under test by setting a main tester, collects current and voltage at multiple measuring points on the device under test through multiple wireless collection mechanisms, and transmits the current and voltage information to the main tester wirelessly, effectively avoiding the problem of low test efficiency caused by moving, wiring and changing lines of the test instrument. At the same time, wireless transmission is used instead of long cable transmission to reduce the influence of external electromagnetic interference on the test results. By setting a handheld data viewer to be wirelessly connected to the main tester, the current and voltage information of the measuring points of the device under test are obtained from the main tester, and there is no need for staff to frequently travel back and forth between the test points and the loop circuit tester, thereby solving the technical problems of low efficiency and unstable test results of multi-loop resistance testing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the wireless sampling mechanism and the wireless transmission device in the present invention.

[0023] Figure 3 It is a schematic diagram of the electrical structure of the present invention.

[0024] 1-main tester, 2-wireless sampling mechanism, 3-handheld data viewer, 4-equipment box, 5-display screen, 6-control module, 7-wireless transceiver module, 8-power supply, 9-power output power control module, 10-power charging port, 11-constant current source, 12-output terminal, 13-operation button, 14-printer, 15-switch button, 16-data storage module, 17-sampling clamp, 18-connection head, 19-cable, 20-wireless transmission device. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Example

[0030] like Figures 1 to 3 As shown, an embodiment of the present invention provides a novel multi-point loop resistance tester for measuring the loop resistance of a device under test, comprising a main tester 1, a handheld data viewer 3 and a plurality of wireless sampling mechanisms 2, wherein the main tester 1 is used to provide a test current to the device under test, the wireless sampling mechanism 2 is wirelessly connected to the main tester 1 via a wireless transmission device 20, and is used to collect current and voltage information on the device under test, and transmit the current and voltage information to the main tester 1, and the handheld data viewer 3 is wirelessly connected to the main tester 1, and is used to obtain current and voltage information of the device under test from the main tester 1.

[0031] Specifically, the main tester 1 includes an equipment box 4 and a display screen 5, a power module, an output circuit, a control module 6 and a wireless transceiver module 7 arranged in the equipment box 4, the power module is electrically connected to the output circuit, the output circuit is connected to the device under test to transmit the test current, the display screen 5, the power module, the output circuit and the wireless transceiver module 7 are all electrically connected to the control module 6, more specifically, the power module includes a power supply 8 and a power output power control module 9, the power supply 8 is electrically connected to the power output power control module 9, the power output power control module 9 is electrically connected to the output circuit and the control module 6, the output circuit includes a constant current source 11 and an output terminal 12, the input end of the constant current source 11 is connected to the The output end of the power output power control module 9 of the power module is connected, the output end of the constant current source 11 is connected to the output terminal 12, and the control end of the constant current source 11 is electrically connected to the control module 6. When in use, the output terminal 12 is connected to the device under test to output the test current. The wireless sampling mechanism 2 includes a sampling clamp 17, a wiring head 18 and a cable 19. The sampling clamp 17 is used to clamp the test point on the device under test, and a sensor for collecting current and voltage is arranged therein. The wiring head 18 is installed on the sampling clamp 17, one end of which is connected to the sensor, and the other end is connected to the cable 19. The other end of the cable 19 is connected to the wireless transmission device 20, and the wireless transmission device 20 is wirelessly connected to the main tester 1.

[0032] Among them, the control module 6 can be a microcontroller MCU, the display screen 5 can be a touch-sensitive display screen, the sensor can be a current sensor and a voltage sensor, the power supply 8 is used to provide the power required by the main tester 1, the power output power control module 9 can control the output power of the power supply 8 to obtain the required current / voltage, the constant current source 11 is used to stabilize the current output by the power output power control module 9, the wireless transmission device 20 is used to receive the current and voltage signals collected by the sensor, and wirelessly transmit the current and voltage signals to the main tester 1, which needs to be explained The wireless transceiver module 7, display screen 5, power output power control module 9, constant current source 11 and the wireless transmission device 20 are all existing technologies, and suitable models can be purchased on the market according to actual needs, as long as they can provide corresponding functions, so they will not be described in detail here. Preferably, in order to prevent the main tester 1 from accumulating dust when not in use, a cover plate is provided on the equipment box 4, one end of the cover plate is hinged to the equipment box 4 by a hinge, and the other end is detachably connected to the equipment box 4. In this embodiment, the cover plate is detachably connected to the equipment box 4 by a snap.

[0033] In some preferred embodiments, the power module includes a power charging port 10, which is arranged on the surface of the equipment box 4 and is electrically connected to the power supply 8. The power charging port 10 is used to provide an interface for charging the power supply 8 with external power.

[0034] In some preferred embodiments, an operation button 13 is provided on the equipment box 4, and the operation button 13 is electrically connected to the control module 6. When the display screen 5 is not a touch-sensitive display screen, the main tester 1 can be controlled by the operation button 13, including but not limited to adjusting the output current, selecting, viewing data, etc.

[0035] In some preferred embodiments, a printer 14 is provided on the equipment box 4, and the printer 14 is electrically connected to the control module 6 and the power output power control module 9 of the power module, and is used to print out the current and voltage information stored in the main tester 1 for use by the staff.

[0036] In some preferred embodiments, a switch button 15 is provided on the equipment box 4, the input end of the switch button 15 is connected to the output end of the power supply 8, and the output end of the switch button 15 is connected to the input end of the power supply output power control module 9, for controlling the start and stop of the main tester 1.

[0037] In some preferred embodiments, the main tester 1 is provided with a data storage module 16, and the data storage module 16 is electrically connected to the control module 6. The data storage module 16 is used to store the current and voltage information obtained by the main tester 1 for the staff to query the historical records, thereby facilitating the staff to compare and analyze on site.

[0038] In summary, a novel multi-point loop resistance tester provided by an embodiment of the present invention provides a test current to a device under test by setting a main tester, collects current and voltage at multiple measuring points on the device under test through multiple wireless collection mechanisms, and transmits the current and voltage information to the main tester wirelessly, thereby effectively avoiding the problem of low test efficiency caused by moving, wiring, and changing lines of the test instrument. At the same time, wireless transmission is used instead of long cable transmission to reduce the impact of external electromagnetic interference on the test results. By setting a wireless connection between a handheld data viewer and the main tester, the current and voltage information of the measuring points of the device under test are obtained from the main tester, and there is no need for staff to frequently travel back and forth between the test points and the loop circuit tester, thereby solving the technical problems of low efficiency and unstable test results of multi-loop resistance testing in the prior art. At the same time, functions such as data preservation, historical data query, and printing are provided to increase the functions of the loop resistance tester.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A new type of multi-point loop resistance tester, characterized in that: It comprises a main tester (1), a wireless sampling mechanism (2) and a handheld data viewer (3); The main tester (1) is used to provide a test current to the device under test; The wireless sampling mechanism (2) is wirelessly connected to the main tester (1) via a wireless transmission device, and is used to collect current and voltage information on the device to be tested, and transmit the current and voltage information to the main tester (1); The handheld data viewer (3) is wirelessly connected to the main tester (1) and is used to obtain current and voltage information of the device under test from the main tester (1).

2. A novel multi-point loop resistance tester according to claim 1, characterized in that: The main tester (1) comprises an equipment box (4) and a display screen (5), a power module, an output circuit, a control module (6) and a wireless transceiver module (7) arranged on the equipment box (4); the power module is electrically connected to the output circuit; the output circuit is connected to the device to be tested to transmit a test current; the display screen (5), the power module, the output circuit and the wireless transceiver module (7) are all electrically connected to the control module (6).

3. A novel multi-point loop resistance tester according to claim 2, characterized in that: The power supply module comprises a power supply (8) and a power supply output power control module (9); the power supply (8) is electrically connected to the power supply output power control module (9); and the power supply output power control module (9) is electrically connected to the output circuit and the control module (6).

4. A novel multi-point loop resistance tester according to claim 3, characterized in that: The power module comprises a power charging port (10), and the power charging port (10) is arranged on the surface of the equipment box (4) and is electrically connected to the power source (8).

5. A novel multi-point loop resistance tester according to claim 2, characterized in that: The output circuit comprises a constant current source (11) and an output terminal (12); the input end of the constant current source (11) is connected to the output end of the power module; the output end of the constant current source (11) is connected to the output terminal (12); the control end of the constant current source (11) is electrically connected to the control module (6); when in use, the output terminal (12) is connected to the device under test to output a test current.

6. A novel multi-point loop resistance tester according to claim 2, characterized in that: An operating button (13) is provided on the equipment box (4), and the operating button (13) is electrically connected to the control module (6).

7. A novel multi-point loop resistance tester according to claim 2, characterized in that: The equipment box (4) is provided with a printer (14), and the printer (14) is electrically connected to the control module (6) and the power module.

8. A novel multi-point loop resistance tester according to claim 4, characterized in that: The equipment box (4) is provided with a switch button (15), the input end of the switch button (15) is connected to the output end of the power supply (8), the output end of the switch button (15) is connected to the input end of the power output power control module (9), and the switch button (15) is used to control the opening and closing of the main tester (1).

9. A novel multi-point loop resistance tester according to claim 2, characterized in that: The main tester (1) is provided with a data storage module (16), and the data storage module (16) is electrically connected to the control module (6).

10. A novel multi-point loop resistance tester according to claim 1, characterized in that: The wireless sampling mechanism (2) comprises a sampling clamp (17), a wiring head (18) and a cable (19); the sampling clamp (17) is used to clamp a test point on the device to be tested; a sensor for collecting current and voltage is arranged inside the sampling clamp (17); the wiring head (18) is mounted on the sampling clamp (17); one end of the wiring head (18) is connected to the sensor, and the other end is connected to the cable (19); the other end of the cable (19) is connected to a wireless transmission device (20); and the wireless transmission device (20) is wirelessly connected to the main tester (1).

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