A cable core wire alignment and insulation zero measurement device without power outage

Abstract

The present invention relates to the technical field of power distribution systems, and specifically to a device for non-stop alignment and insulation zero measurement of cable core wires, comprising an upstream module and a downstream module, each of which comprises a multi-channel isolating switch, an MCU controller, a signal generator, a signal receiver, and an insulation resistance tester. The present invention controls the multi-channel isolating switch via the MCU controller, connects the positive pole of the insulation resistance tester to battery cell No. 1, and the negative pole to subsequent battery cells in sequence. If current flows through the insulation resistance tester when connected to battery cell No. 2, the insulation resistance tester will send a signal to the MCU controller, which will record that the insulation between battery cells No. 1 and No. 2 is unqualified. After the negative pole is connected to the subsequent battery cells in sequence, the positive pole is then connected to battery cell No. 2, and the negative pole is connected sequentially starting from battery cell No. 3, and this process is repeated until the positive pole is connected to battery cell No. 12. The principle is simple and the control is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution systems, in particular to a cable core wire non-stop alignment and insulation zero detection device. Background Art

[0002] Secondary cables refer to cables used for control, signal transmission, and feedback. Examples include motor control cables, metering, protection, and electrical communication cables. Currently, research on live detection methods is underway both domestically and internationally, with numerous proposed approaches.

[0003] Old substations and some old substations after renovation generally have non-standard construction problems such as inconsistent cable labeling and inconsistent rubber heads on both sides. Cable verification requires a large-scale primary and secondary power outage of equipment, and the risk of removing the wrong cable is high. When encountering such situations, cables are generally found manually, which consumes a lot of manpower, material and financial resources, and it is impossible to perform power outage maintenance. If DC grounding is used to find the cable, shaking the insulation of the newly connected cable and other methods are used to verify the cable, it also takes a lot of manpower and time. There is an urgent need for a cable core wire non-stop line and insulation zero measurement device. Summary of the Invention

[0004] The purpose of the present invention is to provide a cable core wire alignment and insulation zero detection device without power outage to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for aligning and measuring the insulation zero of cable core wires without power outage comprises an upstream module and a downstream module, wherein the upstream module and the downstream module are connected via a 13-core cable, and both the upstream module and the downstream module comprise a multi-channel isolating switch, an MCU controller, a signal generator, a signal receiver, and an insulation resistance tester, wherein the input end of the multi-channel isolating switch is connected to the output end of the MCU controller, the signal generator, and the insulation resistance tester, and the output end of the multi-channel isolating switch is connected to the signal receiver and the input end of the insulation resistance tester.

[0007] Preferably, the main control of the MCU controller adopts an STM32 single-chip microcomputer, and the STM32 single-chip microcomputer adopts a 64-pin chip.

[0008] Preferably, pin 7 of the STM32 single chip microcomputer is connected to a resistor R10 and a capacitor C19, the resistor R10 and the capacitor C19 are connected in parallel, the input end of the resistor R10 is connected to a +3.3V power supply, and the capacitor C19 is grounded.

[0009] Preferably, the resistance value of the resistor R10 is 10 kΩ, and the capacitance value of the capacitor C19 is 100 nF.

[0010] Preferably, a crystal oscillator X1 is connected between pin 6 and port 5 of the STM32 single-chip computer, a resistor R9 is connected in parallel to the crystal oscillator X1, and capacitors C17 and C18 are connected to both ends of the resistor R9 respectively.

[0011] Preferably, the resistance value of the resistor R9 is 1 MΩ, and the capacitance values of the capacitors C17 and C18 are 22 pF.

[0012] Preferably, the signal generator is a 20 Hz generator, and the signal receiver is a 20 Hz receiver.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the cable core wire non-stop alignment and insulation zero measurement device of the present invention, the MCU controller controls the multi-channel isolating switch, the positive pole of the insulation resistance tester is connected to the No. 1 battery cell, and the negative pole is connected to the subsequent battery cells in sequence. If current appears in the insulation resistance tester when connected to the No. 2 battery cell, then the insulation resistance tester will send a signal to the MCU controller, and the MCU controller will record that the insulation of the No. 1 and No. 2 batteries is unqualified. After the negative pole is connected to the subsequent battery cells in sequence, the positive pole will be connected to the No. 2 battery cell, and the negative pole will be connected in sequence starting from the No. 3 battery cell, and so on until the positive pole is connected to the No. 12 battery cell. The principle is simple and the control is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they provide further detailed explanation, but do not constitute a limitation of the present invention.

[0015] Figure 1 It is a block diagram of the system composition of the present invention;

[0016] Figure 2 This is a circuit diagram of a multi-channel isolating switch according to the present invention;

[0017] Figure 3 This is a circuit diagram of a 20Hz signal transceiver of the present invention;

[0018] Figure 4 This is a circuit diagram of the MCU controller of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention and the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] A device for aligning and measuring insulation zero of cable core wires without power outage, such as Figure 1-Figure 4 As shown, it includes an upstream module and a downstream module, which are connected by a 13-core cable, and both the upstream module and the downstream module include a multi-channel isolation switch, an MCU controller, a signal generator, a signal receiver and an insulation resistance tester. The input end of the multi-channel isolation switch is connected to the output end of the MCU controller, the signal generator and the insulation resistance tester, and the output end of the multi-channel isolation switch is connected to the signal receiver and the input end of the insulation resistance tester. The MCU controller controls the multi-channel isolation switch to connect the positive pole of the insulation resistance tester to the No. 1 battery cell, and the negative pole to the subsequent battery cells in sequence. If current appears in the insulation resistance tester when connected to the No. 2 battery cell, the insulation resistance tester will send a signal to the MCU controller, and the MCU controller will record that the insulation between the No. 1 battery cell and the No. 2 battery cell is unqualified. After the negative pole is connected to the subsequent battery cells in sequence, the positive pole will be connected to the No. 2 battery cell, and the negative pole will be connected in sequence starting from the No. 3 battery cell, and so on until the positive pole is connected to the No. 12 battery cell. The principle is simple and the control is more convenient.

[0021] Furthermore, the main control of the MCU controller adopts STM32 microcontroller.

[0022] Specifically, the STM32 microcontroller uses a 64-pin chip, pin 7 of the STM32 microcontroller is connected to resistor R10 and capacitor C19, resistor R10 and capacitor C19 are connected in parallel, the input end of resistor R10 is connected to a +3.3V power supply, capacitor C19 is grounded, and a crystal oscillator X1 is connected between pin 6 and port 5 of the STM32 microcontroller. Resistor R9 is connected in parallel to the crystal oscillator X1, and capacitors C17 and C18 are connected to both ends of resistor R9 respectively.

[0023] It is worth noting that the resistance value of the resistor R10 is 10 kΩ, the capacitance value of the capacitor C19 is 100 nF, the resistance value of the resistor R9 is 1 MΩ, and the capacitance values of the capacitors C17 and C18 are 22 pF.

[0024] In addition, the signal generator adopts a 20 Hz generator and the signal receiver adopts a 20 Hz receiver.

[0025] The working principle of this cable core line non-stop alignment and insulation zero measurement device is as follows: the upstream module and the downstream module are connected by a 13-core cable, and multi-channel isolation switches are installed on both sides. The main control of the MCU controller adopts the STM32 single-chip microcomputer, and also includes a signal generator, a receiver, a multi-channel isolation switch and an insulation resistance tester. The upstream module MCU controller controls the multi-channel isolation switch and sends a 20Hz signal to a certain pair of 13-core cables. The downstream module MCU controller controls the multi-channel isolation switch and connects one pair to the 20Hz receiver through scanning. When a pair detects a 20Hz signal, the receiver will send a signal to the MCU. After receiving the signal, the MCU will record the channel switch that is open at this time, thereby realizing alignment. If the downstream module does not detect a 20Hz signal after scanning all switches, the upstream module MCU controller will mark the pair of cables as broken. The MCU controller controls the multi-channel isolation switch, connects the positive pole of the insulation resistance tester to battery cell No. 1, and the negative pole to the subsequent battery cells in sequence. If current appears in the insulation resistance tester when connected to battery cell No. 2, the insulation resistance tester will send a signal to the MCU controller, and the MCU controller will record that the insulation between battery cells No. 1 and No. 2 is unqualified. After the negative pole is connected to the subsequent battery cells in sequence, the positive pole will be connected to battery cell No. 2, and the negative pole will be connected starting from battery cell No. 3, and so on until the positive pole is connected to battery cell No. 12. The principle is simple and the control is more convenient.

[0026] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for aligning and measuring insulation zero of cable core wires without power outage, characterized by: The invention comprises an upstream module and a downstream module, wherein the upstream module and the downstream module are connected via a 13-core cable, and each of the upstream module and the downstream module comprises a multi-channel isolating switch, an MCU controller, a signal generator, a signal receiver, and an insulation resistance tester, wherein the input end of the multi-channel isolating switch is connected to the output end of the MCU controller, the signal generator, and the insulation resistance tester, and the output end of the multi-channel isolating switch is connected to the signal receiver and the input end of the insulation resistance tester; the main control of the MCU controller adopts an STM32 single-chip microcomputer, and the STM32 single-chip microcomputer adopts a 64-pin chip; the signal generator adopts a 20Hz generator, and the signal receiver adopts a 20Hz receiver.

2. The cable core wire alignment and insulation zero detection device according to claim 1, characterized in that: Pin 7 of the STM32 single chip microcomputer is connected to a resistor R10 and a capacitor C19, the resistor R10 and the capacitor C19 are connected in parallel, the input end of the resistor R10 is connected to a +3.3V power supply, and the capacitor C19 is grounded.

3. The cable core wire alignment and insulation zero detection device according to claim 2, characterized in that: The resistance value of the resistor R10 is 10 kΩ, and the capacitance value of the capacitor C19 is 100 nF.

4. The cable core wire alignment and insulation zero detection device according to claim 1, characterized in that: A crystal oscillator X1 is connected between pin 6 and port 5 of the STM32 single-chip computer. A resistor R9 is connected in parallel to the crystal oscillator X1. Both ends of the resistor R9 are connected to capacitors C17 and C18, respectively.

5. The cable core wire alignment and insulation zero detection device according to claim 4, characterized in that: The resistance value of the resistor R9 is 1 MΩ, and the capacitance values of the capacitors C17 and C18 are 22 pF.

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