A terminal block loop resistance testing device

Abstract

This invention discloses a terminal block loop resistance testing device. The testing device includes: a loop resistance tester, a connecting wire assembly, and a terminal clamp module. The loop resistance tester is electrically connected to the terminal clamp module via the connecting wire assembly. The terminal clamp module clamps the terminal block and detects the pressure applied by the terminal clamp module in real time, transmitting the pressure value to the loop resistance tester. The loop resistance tester compares the pressure value with a preset pressure value and sends a tightening signal to the terminal clamp module based on the comparison result. The terminal clamp module receives the tightening signal and performs tightening processing according to the tightening signal to make the pressure value equal to the preset pressure value. The loop resistance tester also detects the loop resistance of the terminal block when the pressure value equals the preset pressure value. This invention ensures that the clamping force of the terminal clamp module on the terminal block is the same in each measurement, reducing measurement errors.

Description

Technical Field

[0001] This invention relates to the field of loop resistance testing technology, and in particular to a terminal block loop resistance testing device. Background Technology

[0002] Overheating of terminal blocks in substations is a common defect, and maintenance personnel need to measure the circuit resistance of the terminal blocks before and after handling them.

[0003] In the existing technology, loop resistance testers mostly use a four-wire system for wiring measurement. At the same time, two voltage clamps and two current clamps need to be led out from the instrument and clamped to the terminal block. However, the space left after the bolts of the two terminal blocks are tightened is limited, which is inconvenient for wiring and can easily cause measurement errors. Summary of the Invention

[0004] This invention provides a terminal block circuit resistance testing device to ensure that the clamping force of the terminal block module on the terminal block is the same in each measurement, thereby reducing measurement error.

[0005] According to one aspect of the present invention, a terminal block loop resistance testing device is provided, the terminal block loop resistance testing device comprising:

[0006] Loop resistance tester, connecting wire assembly and terminal clamp module;

[0007] The loop resistance tester is electrically connected to the terminal clamp module via a connecting cable assembly.

[0008] The terminal clamp module is used to clamp the terminal block and detect the pressure value applied by the terminal clamp module in real time, and transmit the pressure value to the loop resistance tester.

[0009] The loop resistance detector is used to compare the pressure value with the preset pressure value and send a tightening signal to the clamp module based on the comparison result;

[0010] The clamp module is used to receive clamping signals and perform clamping processing according to the clamping signals to make the pressure value equal to the preset pressure value;

[0011] The loop resistance tester is also used to test the loop resistance of the terminal block when the pressure value is equal to the preset pressure value.

[0012] Furthermore, the connector module includes:

[0013] Wiring clamps and pressure detection module;

[0014] The pressure detection module is connected to the loop resistance tester via a connecting cable assembly; the pressure detection module is used to detect the pressure value applied by the clamp in real time and transmit the pressure value to the loop resistance tester.

[0015] The terminal clamp is connected to the loop resistance tester via a connecting wire assembly. The loop resistance tester compares the pressure value with the preset pressure value and sends a tightening signal to the terminal clamp based on the comparison result to test the loop resistance of the terminal block.

[0016] Furthermore, the wiring clamp includes a fixed clamping part and a movable clamping part;

[0017] The fixing and clamping part includes two first contacts, a first contact fixing part, and a fixing connection part. The two first contacts are disposed on the first contact surface of the first contact fixing part. The first end of the first contact fixing part is connected to the first end of the fixing connection part, and the first contact fixing part and the fixing connection part are perpendicular to each other.

[0018] The movable clamping part includes two second contacts, a clamping bottom, and a second contact fixing part. The clamping bottom is slidably disposed with the fixing connection part, and the second contact fixing part is disposed on the surface of the clamping bottom near the first contact fixing part. The two second contacts are disposed on the second contact surface of the second contact fixing part near the surface of the first contact, and the two second contacts are disposed in a one-to-one correspondence with the two first contacts.

[0019] The loop resistance tester is electrically connected to the fixed clamping part and the movable clamping part of the clamping module via a connecting wire assembly; the loop resistance tester is used to compare the pressure value with the preset pressure value and send a tightening signal to the movable clamping part according to the comparison result;

[0020] The movable clamping part is used to receive the clamping signal and perform clamping processing according to the clamping signal so that the pressure value is equal to the preset pressure value.

[0021] Furthermore, the loop resistance detector is used for:

[0022] The pressure value is compared with the preset pressure value, and a tightening signal is sent to the clamp module according to the comparison result and the proportional-integral-derivative control method.

[0023] Furthermore, the loop resistance detector includes:

[0024] Pressure fine-tuning module and resistance detection module;

[0025] The first end of the pressure fine-tuning module is electrically connected to the pressure detection module via a connecting cable group; the pressure fine-tuning module is used to receive the pressure value detected in real time by the pressure detection module, compare the pressure value with the preset pressure value, and send a tightening signal to the terminal clamp according to the comparison result.

[0026] The second end of the pressure fine-tuning module is connected to the first end of the resistance detection module. The second end of the resistance detection module is electrically connected to the second end of the terminal clamp via a connecting wire group. The pressure fine-tuning module is also used to send a detection signal to the resistance detection module when the pressure value is equal to the preset pressure value, so as to realize the detection of the loop resistance of the terminal block through the resistance detection module.

[0027] Furthermore, the connection line assembly includes a first voltage connection line, a second voltage connection line, a first current connection line, a second voltage connection line, a detection connection line, and a control connection line;

[0028] The first voltage connection terminal of the loop resistance tester is connected to one of the first contacts via a first voltage connection line, and the second voltage connection terminal of the loop resistance tester is connected to another first contact via a second voltage connection line; the first current connection terminal of the loop resistance tester is connected to one of the second contacts via a first current connection line, and the second current connection terminal of the loop resistance tester is connected to another second contact via a second current connection line.

[0029] The detection end of the loop resistance tester is connected to the pressure detection module via a detection connection line; the control end of the loop resistance tester is connected to the movable clamping part via a control connection line.

[0030] Furthermore, the terminal block loop resistance testing device also includes:

[0031] Display module;

[0032] The display module is connected to the loop resistance tester; the display module is used to display the loop resistance of the terminal block.

[0033] Furthermore, the terminal block loop resistance testing device also includes:

[0034] Alarm module;

[0035] The alarm module is connected to the loop resistance tester;

[0036] The loop resistance tester is used to send an alarm signal to the alarm module if the pressure value is less than the preset pressure value for a first preset time, so as to control the alarm module to perform alarm processing.

[0037] Furthermore, the terminal block loop resistance testing device also includes:

[0038] Power module; the power module is connected to the loop resistance tester and the terminal clamp module;

[0039] The power module is used to power the loop resistance tester and the clamp module.

[0040] Furthermore, the pressure detection module includes a pressure sensor.

[0041] The terminal block loop resistance testing device provided in this embodiment of the invention includes a loop resistance tester, a connecting wire group, and a terminal clamp module. The terminal clamp module clamps the terminal block and detects the pressure value applied by the terminal clamp module in real time. The pressure value is transmitted to the loop resistance tester, which compares the pressure value with a preset pressure value and sends a tightening signal to the terminal clamp module based on the comparison result. The terminal clamp module receives the tightening signal and performs tightening processing to make the pressure value equal to the preset pressure value. After the pressure value equals the preset pressure value, the loop resistance tester detects the loop resistance of the terminal block. This ensures that the clamping force of the terminal clamp module on the terminal block is automatically adjusted each time the loop resistance of the terminal block is measured, ensuring that the clamping force of the terminal clamp module on the terminal block is the same each time, thus reducing measurement errors.

[0042] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of a terminal block loop resistance testing device according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of another terminal block loop resistance testing device provided according to an embodiment of the present invention;

[0046] Figure 3 This is a front view of the structure of a wiring clamp provided according to an embodiment of the present invention;

[0047] Figure 4 This is a left view of the structure of a wiring clamp provided according to an embodiment of the present invention;

[0048] Figure 5 This is a right view of the structure of a wiring clamp provided according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of another terminal block circuit resistance testing device provided according to an embodiment of the present invention;

[0050] Figure 7This is a schematic diagram of the structure of another terminal block circuit resistance testing device provided according to an embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of another terminal block loop resistance testing device provided according to an embodiment of the present invention. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] This invention provides a terminal block loop resistance testing device. Figure 1 This is a schematic diagram of a terminal block loop resistance testing device according to an embodiment of the present invention. (Refer to...) Figure 1 The terminal block circuit resistance testing device includes:

[0055] 1. Loop resistance tester; 2. Connecting wire assembly; 3. Terminal clamp module;

[0056] The loop resistance tester 1 is electrically connected to the terminal clamp module 3 via the connecting cable group 2;

[0057] The terminal clamp module 3 is used to clamp the terminal block 4 and detect the pressure value applied by the terminal clamp module 3 in real time, and transmit the pressure value to the loop resistance tester 1.

[0058] The loop resistance detector 1 is used to compare the pressure value with the preset pressure value and send a tightening signal to the clamp module 3 according to the comparison result;

[0059] The clamp module 3 is used to receive the clamping signal and perform clamping processing according to the clamping signal so that the pressure value is equal to the preset pressure value;

[0060] The loop resistance tester 1 is also used to test the loop resistance of the terminal block 4 when the pressure value is equal to the preset pressure value.

[0061] Specifically, when testing the loop resistance of the terminal block 4, the terminal block 4 must first be fixed to the terminal clamp module 3. At this time, the clamping force of the terminal clamp module 3 on the terminal block 4 is relatively small, only serving to fix the terminal block 4. Since the test result of the loop resistance of the terminal block 4 is related to the clamping force applied by the terminal clamp module 3 to the terminal block 4, different clamping forces during each measurement will lead to different measurement errors. Insufficient clamping force can easily cause the measurement result to be too large and poses a certain operational risk. At this time, the terminal clamp module 3 will transmit its real-time pressure value to the loop resistance detector 1. The loop resistance detector 1 will compare the pressure value with the preset pressure value. If the pressure value is less than the preset pressure value, it will send a tightening signal to the terminal clamp module 3 to continue to apply clamping force to the terminal block through the terminal clamp module 3, so that the measured pressure value is equal to the preset pressure value. When the measured pressure value is equal to the preset pressure value, the loop resistance of the terminal block 4 is detected. The preset pressure value can be set according to the actual situation, and this embodiment of the invention does not limit it.

[0062] The terminal block loop resistance testing device provided in this embodiment of the invention includes a loop resistance tester 1, a connecting wire group 2, and a terminal clamp module 3. The terminal clamp module 3 clamps the terminal block 4 and detects the pressure value applied by the terminal clamp module 3 in real time, transmitting the pressure value to the loop resistance tester 1. The loop resistance tester 1 compares the pressure value with a preset pressure value and sends a tightening signal to the terminal clamp module 3 based on the comparison result. The terminal clamp module 3 receives the tightening signal and performs tightening processing according to the tightening signal to make the pressure value equal to the preset pressure value. After the pressure value equals the preset pressure value, the loop resistance tester 1 detects the loop resistance of the terminal block 4. This ensures that the clamping force of the terminal clamp module 3 on the terminal block 4 can be automatically adjusted each time the loop resistance of the terminal block 4 is measured, ensuring that the clamping force of the terminal clamp module 3 on the terminal block 4 is the same each time, reducing measurement errors.

[0063] Furthermore, Figure 2 This is a schematic diagram of another terminal block loop resistance testing device provided according to an embodiment of the present invention, for reference. Figure 2 The wiring clamp module includes:

[0064] Wiring clamp 31 and pressure detection module 32;

[0065] The pressure detection module 32 is connected to the loop resistance tester 1 via the connecting cable group 2; the pressure detection module 1 is used to detect the pressure value applied by the connector 31 in real time and transmit the pressure value to the loop resistance tester 1.

[0066] The terminal clamp 31 is connected to the loop resistance tester 1 via the connecting wire group 2. The loop resistance tester 1 is used to compare the pressure value with the preset pressure value and send a tightening signal to the terminal clamp 31 according to the comparison result to test the loop resistance of the terminal block 4.

[0067] Specifically, when testing the loop resistance of the terminal block 4, the terminal block 4 must first be fixed on the terminal clamp 31. At this time, the pressure detection module 32 will transmit the real-time pressure value to the loop resistance detector 1. The loop resistance detector 1 will compare the pressure value with the preset pressure value. If the pressure value is less than the preset pressure value, a tightening signal will be sent to the terminal clamp 31 to continue to apply clamping force to the terminal block 4 through the terminal clamp 31 so that the measured pressure value is equal to the preset pressure value. When the measured pressure value is equal to the preset pressure value, the loop resistance of the terminal block 4 will be detected.

[0068] Furthermore, Figure 3 This is a front view of a wiring clamp according to an embodiment of the present invention. Figure 4 This is a left view of the structure of a wiring clamp according to an embodiment of the present invention. Figure 5 This is a right view of the structure of a wiring clamp according to an embodiment of the present invention, with reference to... Figure 1 , Figures 3-5 The wiring clamp includes a fixed clamping part 311 and a movable clamping part 312;

[0069] The fixing clamping part 311 includes two first contacts 011, a first contact fixing part 012, and a fixing connection part 013. The two first contacts 011 are disposed on the first contact surface of the first contact fixing part 012. The first end of the first contact fixing part 012 is connected to the first end of the fixing connection part 013, and the first contact fixing part 012 and the fixing connection part 013 are perpendicular to each other.

[0070] The movable clamping part 312 includes two second contacts 021, a clamping bottom 022, and a second contact fixing part 023. The clamping bottom 022 is slidably disposed with the fixed connection part 013, and the second contact fixing part 023 is disposed on the surface of the clamping bottom 022 near the first contact fixing part 012. The two second contacts 021 are disposed on the second contact surface of the second contact fixing part 023 near the first contact surface, and the two second contacts 021 are disposed in a one-to-one correspondence with the two first contacts 011.

[0071] The loop resistance tester 1 is electrically connected to the fixed clamping part 311 and the movable clamping part 312 of the clamping module 3 via the connecting wire group 2; the loop resistance tester 1 is used to compare the pressure value with the preset pressure value and send a tightening signal to the movable clamping part 312 according to the comparison result.

[0072] The movable clamping unit 312 is used to receive a clamping signal and perform clamping processing according to the clamping signal so that the pressure value is equal to the preset pressure value.

[0073] Specifically, after the terminal block 4 is fixed by the fixed clamping part 311 and the movable clamping part 312, the pressure detection module 32 will transmit the pressure value detected in real time to the loop resistance detector 1. The loop resistance detector 1 will compare the pressure value with the preset pressure value. If the pressure value is less than the preset pressure value, a clamping signal will be sent to the movable clamping part 312 so that the clamping bottom 022 drives the movable clamping part 312 to slide on the fixed connection part 013 to move closer to the two first contacts 011, thereby continuing to apply clamping force to the terminal block 4 so that the measured pressure value is equal to the preset pressure value. When the measured pressure value is equal to the preset pressure value, the loop resistance of the terminal block 4 will be detected.

[0074] Furthermore, the loop resistance detector is used for:

[0075] The pressure value is compared with the preset pressure value, and a tightening signal is sent to the clamp module according to the comparison result and the proportional-integral-derivative control method.

[0076] Specifically, based on the pressure value and the proportional-integral-derivative (PID) control method, the clamping force of the connector module on the connector plate can be automatically adjusted to ensure that the clamping force of the connector module on the connector plate is the same in each measurement. For example, when a difference is detected between the pressure value and the preset pressure value, the proportional control part of the PID control method responds immediately, and the integral control part eliminates the continuous deviation of the clamping force. Finally, the derivative control part performs rapid compensation based on the rate of change of the clamping force to achieve the measured pressure value equal to the preset pressure value.

[0077] Furthermore, Figure 6 This is a schematic diagram of another terminal block loop resistance testing device provided according to an embodiment of the present invention, with reference to... Figure 6 The loop resistance detector includes:

[0078] Pressure fine-tuning module 11 and resistance detection module 12;

[0079] The first end of the pressure fine adjustment module 11 is electrically connected to the pressure detection module 32 through the connecting wire group 2; the pressure fine adjustment module 11 is used to receive the pressure value detected in real time by the pressure detection module 32, compare the pressure value with the preset pressure value, and send a tightening signal to the wiring clamp 31 according to the comparison result.

[0080] The second end of the pressure fine adjustment module 11 is connected to the first end of the resistance detection module 12. The second end of the resistance detection module 12 is electrically connected to the second end of the terminal clamp 31 through the connecting wire group 2. The pressure fine adjustment module 11 is also used to send a detection signal to the resistance detection module 12 when the pressure value is equal to the preset pressure value, so as to realize the detection of the loop resistance of the terminal block 4 through the resistance detection module 12.

[0081] Specifically, when testing the loop resistance of the terminal block 4, the terminal block 4 must first be fixed on the terminal clamp 31. At this time, the pressure detection module 32 will transmit the real-time detected pressure value to the pressure fine adjustment module 11. The pressure fine adjustment module 11 will compare the pressure value with the preset pressure value. If the pressure value is less than the preset pressure value, a tightening signal will be sent to the terminal clamp 31 to continue to apply clamping force to the terminal block 4 through the terminal clamp 31 so that the measured pressure value is equal to the preset pressure value. When the measured pressure value is equal to the preset pressure value, a detection signal will be sent to the resistance detection module 12 to realize the detection of the loop resistance of the terminal block 4.

[0082] Furthermore, the connection line assembly includes a first voltage connection line, a second voltage connection line, a first current connection line, a second voltage connection line, a detection connection line, and a control connection line;

[0083] The first voltage connection terminal of the loop resistance tester is connected to one of the first contacts via a first voltage connection line, and the second voltage connection terminal of the loop resistance tester is connected to another first contact via a second voltage connection line; the first current connection terminal of the loop resistance tester is connected to one of the second contacts via a first current connection line, and the second current connection terminal of the loop resistance tester is connected to another second contact via a second current connection line.

[0084] The detection end of the loop resistance tester is connected to the pressure detection module via a detection connection line; the control end of the loop resistance tester is connected to the movable clamping part via a control connection line.

[0085] Specifically, the connecting wire assembly can be integrated by first voltage connecting wire, second voltage connecting wire, first current connecting wire, second voltage connecting wire, detection connecting wire and control connecting wire, with 6 connectors leading out from each end, which are respectively connected to the loop resistance tester and the wiring clamp module; and the distance between the first contact and the second contact can be adjusted according to the thickness of different wiring boards.

[0086] Further reference Figure 1 The terminal block circuit resistance testing device also includes:

[0087] Display module 5;

[0088] Display module 5 is connected to loop resistance tester 1; display module 5 is used to display the loop resistance of terminal block 4.

[0089] Specifically, after testing the loop resistance of the terminal block 4, the tested loop resistance can be transmitted to the display module 5 for display, so that staff can easily view it.

[0090] Furthermore, Figure 7 This is a schematic diagram of another terminal block loop resistance testing device according to an embodiment of the present invention, with reference to... Figure 7 The terminal block circuit resistance testing device also includes:

[0091] Alarm module 6;

[0092] Alarm module 6 is connected to loop resistance tester 1;

[0093] The loop resistance tester 1 is used to send an alarm signal to the alarm module 6 if the pressure value is less than the preset pressure value for a first preset time, so as to control the alarm module 6 to perform alarm processing.

[0094] Specifically, if the detected pressure value is less than the preset pressure value for a first preset time, it means that the terminal clamp module 3 cannot apply the preset clamping force to the terminal block 4 so that the measured pressure value is equal to the preset pressure value. At this time, an alarm signal can be sent to the alarm module 6 to control the alarm module 6 to perform alarm processing, reminding the staff that the terminal block circuit resistance testing device is abnormal and needs to be repaired in time.

[0095] Furthermore, Figure 8 This is a schematic diagram of another terminal block loop resistance testing device provided according to an embodiment of the present invention, for reference. Figure 8 The terminal block circuit resistance testing device also includes:

[0096] Power module 7; Power module 7 is connected to loop resistance tester 1 and terminal clamp module 3;

[0097] Power module 7 is used to power loop resistance tester 1 and clamp module 3.

[0098] Specifically, the power module 7 can be a charging power supply or a non-charging power supply. For example, the power module 7 can output a constant current of 30A DC, 50A DC or 100A DC depending on the actual situation.

[0099] Furthermore, the pressure detection module includes a pressure sensor.

[0100] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0101] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A terminal block loop resistance testing device, characterized in that, include: Loop resistance tester, connecting wire assembly and terminal clamp module; The loop resistance tester is electrically connected to the terminal clamp module via the connecting wire group; The terminal clamp module is used to clamp the terminal block and detect the pressure value applied by the terminal clamp module in real time, and transmit the pressure value to the loop resistance tester. The loop resistance tester is used to compare the pressure value with the preset pressure value and send a tightening signal to the clamp module according to the comparison result; The clamp module is used to receive the tightening signal and perform tightening processing according to the tightening signal so that the pressure value is equal to the preset pressure value; The loop resistance tester is also used to detect the loop resistance of the terminal block when the pressure value is equal to the preset pressure value; The wiring clamp module includes: Wiring clamps and pressure detection module; The pressure detection module is connected to the loop resistance tester via the connecting cable group; the pressure detection module is used to detect the pressure value applied by the terminal clamp in real time and transmit the pressure value to the loop resistance tester. The terminal clamp is connected to the loop resistance tester via the connecting wire group. The loop resistance tester is used to compare the pressure value with a preset pressure value and send a tightening signal to the terminal clamp according to the comparison result, so as to test the loop resistance of the terminal block. The wiring clamp includes a fixed clamping part and a movable clamping part; The fixing and clamping part includes two first contacts, a first contact fixing part, and a fixing connection part. The two first contacts are disposed on the first contact surface of the first contact fixing part. The first end of the first contact fixing part is connected to the first end of the fixing connection part, and the first contact fixing part and the fixing connection part are perpendicular to each other. The movable pressing part includes two second contacts, a pressing bottom and a second contact fixing part. The pressing bottom is slidably disposed with the fixed connection part, and the second contact fixing part is disposed on the surface of the pressing bottom near the first contact fixing part. The two second contacts are disposed on the second contact surface of the second contact fixing part near the first contact surface, and the two second contacts are disposed in a one-to-one correspondence with the two first contacts. The loop resistance tester is electrically connected to the fixed clamping part and the movable clamping part of the terminal clamp module through the connecting wire group; the loop resistance tester is used to compare the pressure value with the preset pressure value, and send a tightening signal to the movable clamping part according to the comparison result; The movable clamping part is used to receive the clamping signal and perform clamping processing according to the clamping signal so that the pressure value is equal to the preset pressure value; The loop resistance tester is used to compare the pressure value with a preset pressure value and send a tightening signal to the clamp module according to the comparison result and the proportional-integral-derivative control method. When a difference is detected between the pressure value and the preset pressure value, the proportional control part of the proportional-integral-derivative control method responds immediately, and the integral control part eliminates the continuous deviation of the clamping force. The derivative control part performs rapid compensation according to the rate of change of the clamping force, so as to realize that the measured pressure value is equal to the preset pressure value.

2. The terminal block circuit resistance testing device according to claim 1, characterized in that, The loop resistance tester includes: Pressure fine-tuning module and resistance detection module; The first end of the pressure fine-tuning module is electrically connected to the pressure detection module through the connecting cable group; the pressure fine-tuning module is used to receive the pressure value detected in real time by the pressure detection module, compare the pressure value with the preset pressure value, and send a tightening signal to the terminal clamp according to the comparison result. The second end of the pressure fine-tuning module is connected to the first end of the resistance detection module. The second end of the resistance detection module is electrically connected to the second end of the terminal clamp through the connecting wire group. The pressure fine-tuning module is also used to send a detection signal to the resistance detection module when the pressure value is equal to the preset pressure value, so as to realize the detection of the loop resistance of the terminal block through the resistance detection module.

3. The terminal block circuit resistance testing device according to claim 1, characterized in that, The connection line group includes a first voltage connection line, a second voltage connection line, a first current connection line, a second current connection line, a detection connection line, and a control connection line; The first voltage connection terminal of the loop resistance tester is connected to one of the first contacts via the first voltage connection line, and the second voltage connection terminal of the loop resistance tester is connected to the other first contact via the second voltage connection line; the first current connection terminal of the loop resistance tester is connected to one of the second contacts via the first current connection line, and the second current connection terminal of the loop resistance tester is connected to the other second contact via the second current connection line. The detection end of the loop resistance tester is connected to the pressure detection module via the detection connection line; the control end of the loop resistance tester is connected to the movable clamping part via the control connection line.

4. The terminal block circuit resistance testing device according to claim 1, characterized in that, Also includes: Display module; The display module is connected to the loop resistance tester; The display module is used to display the loop resistance of the terminal block.

5. The terminal block circuit resistance testing device according to claim 1, characterized in that, Also includes: Alarm module; The alarm module is connected to the loop resistance tester; The loop resistance tester is used to send an alarm signal to the alarm module if the pressure value is less than the preset pressure value for a first preset time, so as to control the alarm module to perform alarm processing.

6. The terminal block circuit resistance testing device according to claim 1, characterized in that, Also includes: Power module; The power module is connected to the loop resistance tester and the clamp module; The power module is used to supply power to the loop resistance tester and the clamp module.

7. The terminal block circuit resistance testing device according to claim 1, characterized in that, The pressure detection module includes a pressure sensor.

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