A mechanical property testing system

Abstract

The application discloses a mechanical property testing system, and belongs to the technical field of high-voltage switch testing equipment. Mainly including cabinet and host computer, switch mechanical property tester, PLC controller, AC voltage regulator, at least two DC adjustable power supplies and voltage control circuit installed in the cabinet, the host computer is configured with double network ports, the double network ports include first network port and second network port, the first network port is in communication connection with the switch mechanical property tester and the PLC controller, the second network port is an interface reserved for MES information system access, and the double network ports are configured through the host computer, wherein the second network port directly reserves the interface for the MES information system access, without the need of additionally increasing an interface module, so that the test data can be docked with the MES information system, the demand for production process data visualization and query is met, and the use cost and operation complexity are reduced.

Description

Technical Field

[0001] This application relates to the technical field of high-voltage switch testing equipment, specifically a mechanical characteristic testing system. Background Technology

[0002] A mechanical characteristic tester is an instrument that can measure parameters such as opening and closing time, speed, stroke, and bounce of high-voltage circuit breakers. The mechanical characteristic tester requires the provision of opening and closing operating voltage and energy storage voltage. Current development trends show a growing trend towards unmanned and minimally manned manufacturing, automated production lines, and increasingly visible and queryable production process data. In the manufacturing sector, with continuous technological advancements and industrial upgrading, enterprises are placing greater emphasis on the application of digitalization and information technology in production management. More and more equipment needs to be connected to MES (Manufacturing Execution System) information systems, and mechanical characteristic testers are no exception.

[0003] However, most mechanical characteristic testers on the market are currently standalone devices that lack the ability to connect to the MES information system. They require additional interface modules to achieve connection, which increases the cost and complexity of use. Furthermore, most existing mechanical characteristic testers have built-in DC power supplies, which are only suitable for high-voltage circuit breakers with DC energy storage voltage. They cannot be operated when encountering high-voltage circuit breakers with AC energy storage voltage, thus limiting their applicability. Utility Model Content

[0004] The purpose of this invention is to provide a mechanical characteristic testing system that solves the technical problems of existing mechanical characteristic testers being difficult to connect to the MES information system and having limited applicability to a single type of energy storage voltage.

[0005] The technical solution adopted by this application to solve its technical problem is: A mechanical characteristic testing system includes a cabinet and a host computer, a switch mechanical characteristic tester, a PLC controller, an AC voltage regulator, at least two DC adjustable power supplies and a voltage control circuit installed inside the cabinet. The host computer is equipped with dual network ports, including a first network port and a second network port. The first network port is connected to the switch mechanical characteristic tester and the PLC controller, and the second network port is a reserved interface for accessing the MES information system. The PLC controller is electrically connected to the AC voltage regulator and the voltage control circuit respectively. The PLC controller is used to control the voltage boosting and bucking actions of the AC voltage regulator, as well as to control the power selection and shutdown of the voltage control circuit. The voltage control circuit is electrically connected to the two DC adjustable power supplies and the AC voltage regulator respectively. The switch mechanical characteristic tester is used to collect the break signal, opening and closing current signal and position sensor signal of the test object, and transmit the collected signals to the host computer for analysis.

[0006] Preferably, the switch mechanical characteristic tester includes an acquisition and control module, which supports 4-channel analog signal acquisition, 4-channel analog signal output and 16-bit DIO digital signal input and output, with a maximum analog signal acquisition and output rate of 500ksps.

[0007] Preferably, the acquisition and control module is used to realize digital switch quantity acquisition, analog quantity acquisition and digital output. The digital switch quantity acquisition includes the acquisition of 3 disconnection signals and external trigger closing and opening voltage signals. The analog quantity acquisition includes the acquisition of 3 displacement sensor signals and 1 coil current signal. The digital output is used for closing and opening control.

[0008] Preferably, the cabinet is also equipped with a switch and a serial server, and the switch is connected to the first network port of the host computer.

[0009] Preferably, a loop resistance tester may also be optionally installed inside the cabinet, and the loop resistance tester is connected to the first network port of the host computer.

[0010] Preferably, the host computer sends control commands to the PLC controller, and the PLC controller drives the voltage control circuit to switch the output paths of the closing and opening voltage and the energy storage voltage.

[0011] The beneficial effects of this application are: 1. This system is configured with dual network ports via a host computer. The second network port is directly reserved as an interface for the MES information system. Without the need for additional interface modules, test data can be connected to the MES information system, meeting the needs for data visualization and querying in the production process, reducing usage costs and operational complexity. In addition, it integrates an AC voltage regulator and two DC adjustable power supplies. With the help of a PLC controller and voltage control circuit, it can flexibly select the type of power supply for closing and opening circuit breakers and energy storage power supply, supporting both AC and DC energy storage voltages, effectively expanding the application range of high-voltage circuit breakers.

[0012] 2. The switch mechanical characteristic tester, in conjunction with the data analysis function of the host computer, improves the accuracy and reliability of mechanical characteristic parameter testing. All functional modules are integrated within the cabinet, resulting in a compact structure and reasonable layout, facilitating on-site deployment and operation / maintenance. In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a block diagram of the mechanical property testing system of this utility model; Figure 2 This is a system block diagram of the switch mechanical characteristic tester of this utility model; Figure 3 This is a system block diagram of the PLC controller of this utility model; Figure 4 This is a block diagram of the voltage control circuit of this utility model; Figure 5 This is a schematic diagram of the front panel structure for mounting the cabinet according to this utility model.

[0014] The following are the labeling elements in the figure: 1. 4U panel; 2. Monitor panel; 3. Switching power supply panel; 4. Drawer front panel; 5. Switch mechanical characteristic tester; 6. Loop resistance tester; 7. DC adjustable power supply 1; 8. DC adjustable power supply 2. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0017] Please see Figure 1-5 The embodiments provided by this utility model are as follows: like Figure 1 As shown, a mechanical characteristic testing system includes a cabinet and a host computer, a switch mechanical characteristic tester 5, a PLC controller, an AC voltage regulator, at least two DC adjustable power supplies and a voltage control circuit installed inside the cabinet. Using a cabinet as the physical carrier, the host computer, switch mechanical characteristic tester 5, PLC, AC voltage regulator, DC adjustable power supply, and voltage control circuit are integrated into one unit to form an integrated test unit. like Figure 5As shown, the cabinet is constructed from top to bottom as follows: 4U panel 1, monitor panel 2, switching power supply panel 3, drawer panel 4, switch mechanical characteristic tester 5, loop resistance tester 6, DC adjustable power supply 17, and DC adjustable power supply 28. Each component is connected through preset electrical lines and communication links, avoiding messy wiring between distributed equipment and forming a closed-loop collaborative system, thereby solving the problems of distributed equipment and cumbersome on-site deployment in existing technologies.

[0018] like Figure 1 As shown, the host computer is equipped with dual network ports, including a first network port and a second network port. The first network port is connected to the switch mechanical characteristic tester 5 and the PLC controller for communication, while the second network port is a reserved interface for accessing the MES information system. The first network port is the internal data hub of the system, which establishes bidirectional communication with the switch mechanical characteristic tester 5 and the PLC controller via Ethernet, transmitting the signals collected by the switch mechanical characteristic tester 5 and the voltage status feedback of the PLC to the host computer, and sending test start commands to the lower level. The second network port uses an Ethernet interface, eliminating the need for an additional interface conversion module. It can directly interface with the MES system, uploading the test data analyzed by the host computer to the MES in real time, thereby solving the technical problem of difficulty in accessing the MES system in existing technologies.

[0019] It is worth noting that the cabinet also houses a switch and a serial server. The switch communicates with the first network port of the host computer, and the first network port of the host computer is connected to the switch via a network cable. The switch mechanical characteristic tester 5, the PLC controller, and the serial server are all connected to the switch via network cables. The host computer can communicate with multiple devices simultaneously. The signals collected by the switch mechanical characteristic tester 5 and the status feedback from the PLC controller are aggregated by the switch and transmitted to the host computer to ensure the stability of data transmission.

[0020] The cabinet can also optionally install a loop resistance tester 6. The loop resistance tester 6 communicates with the first network port of the host computer. As an optional functional module, the loop resistance tester 6 is used to test the loop resistance of the high-voltage circuit breaker. After installation, the loop resistance tester 6 is connected to the switch via a network cable to establish communication with the host computer. The loop resistance tester 6 outputs a constant large current to the circuit under test to detect the loop voltage drop. After calculating the loop resistance value, the loop resistance tester 6 transmits the data to the host computer. With this optional addition, one system can complete two tests, reducing equipment procurement costs and avoiding the cumbersome wiring of two separate devices.

[0021] like Figure 3 As shown, the PLC controller is electrically connected to the AC voltage regulator and the voltage control circuit respectively. The PLC controller is used to control the voltage boosting and bucking actions of the AC voltage regulator, as well as to control the power selection and shutdown of the voltage control circuit. The PLC controller receives the target AC voltage value from the host computer and drives the voltage regulation module of the AC voltage regulator through analog output or digital pulse signal. It detects the output voltage of the voltage regulator in real time and compares it with the target value until the output voltage stabilizes at the target value, so as to achieve precise control of AC voltage. The PLC controller receives the power type selection instruction from the host computer and controls the relay switching in the voltage control circuit through digital output signals, such as relay control signals, to realize the selection or shutdown of the opening / closing voltage or energy storage voltage path, replacing manual power switching.

[0022] The host computer sends control commands to the PLC controller, which then drives the voltage control circuit to switch the output paths of the closing / opening voltage and the energy storage voltage. Based on the parameters of the test object, such as the circuit breaker model, the host computer allows the operator to select the closing / opening voltage value and the type and value of the energy storage voltage. The host computer converts the parameters into standardized control commands and sends them to the PLC controller through the first network port. After parsing the commands, the PLC controller generates two control signals: one controls the output of the adjustable DC power supply to set the closing / opening voltage, and the other controls the relay switching within the voltage control circuit. After the voltage control circuit switching is completed, the PLC controller sends a power-ready signal back to the host computer, which can then start the test. This allows subsequent template calls to automatically execute the power switching, avoiding voltage deviations set by different operators.

[0023] Among them, such as Figure 4 As shown, the voltage control circuit is electrically connected to two DC adjustable power supplies and an AC voltage regulator, respectively. The switch mechanical characteristic tester 5 is used to collect the break signal, closing and opening current signal and position sensor signal of the test object, and transmit the collected signals to the host computer for analysis.

[0024] One end of the voltage control circuit is connected to two DC adjustable power supplies and an AC voltage regulator, while the other end is connected to the test object through a dedicated terminal block. After receiving the relay control signal from the PLC controller, it selectively conducts the corresponding power supply path. If the test object requires DC energy storage, the path from the DC adjustable power supply to the voltage control circuit and from the voltage control circuit to the energy storage port of the test object is conducted, while the AC voltage regulator path is disconnected. If the test object requires AC energy storage, the path from the AC voltage regulator to the voltage control circuit and from the voltage control circuit to the energy storage port of the test object is conducted, thereby achieving flexible adaptation of AC and DC energy storage voltage and opening and closing voltage.

[0025] like Figure 2 As shown, the switch mechanical characteristic tester 5 is connected to the test object through a special probe or wiring. The break signal probe is connected to the A, B, and C phase breaks of the circuit breaker. The current sensor is sleeved on the closing and opening coil circuit, and the position sensor is fixed on the circuit breaker operating mechanism. The switch mechanical characteristic tester 5 acquires three types of core signals in real time: Break signal: detects the open or closed state of the break, such as 1 when the break is open during tripping and 0 when the break is closed during closing, used to calculate the tripping and closing time; Closing and opening current signal: detects changes in coil current, such as the current rising from 0 to a peak value and then falling when closing, which is used to determine whether the coil is working properly.

[0026] Position sensor signal: detects the displacement change of the moving contact of the circuit breaker, such as from 0mm in the open position to 120mm in the closed position, and is used to calculate the stroke and speed.

[0027] After the data acquisition is completed, the switch mechanical characteristic tester 5 transmits the raw signal to the host computer via Ethernet, where the host computer performs data analysis.

[0028] Among them, the switch mechanical characteristic tester 5 includes a data acquisition and control module. The data acquisition and control module adopts a NET9771B Ethernet data acquisition card. The data acquisition and control module supports 4 channels of analog signal acquisition, 4 channels of analog signal output and 16-bit DIO digital signal input and output. The maximum rate of analog signal acquisition and output is 500ksps.

[0029] The 4-channel analog input is used to acquire 3-channel position sensor signals and 1-channel closing / opening current signal. The 4-channel analog output is used to output analog control signals, such as the reference voltage for calibrating the displacement sensor. The 16-bit DIO digital input / output is used to acquire 3-channel break signal, external trigger signal, and internal trigger closing / opening control signal.

[0030] Furthermore, the acquisition and control module is used to realize digital switch quantity acquisition, analog quantity acquisition and digital output. The digital switch quantity acquisition includes the acquisition of 3 disconnection signals and external trigger closing and opening voltage signals. The analog quantity acquisition includes the acquisition of 3 displacement sensor signals and 1 coil current signal. The digital output is used for closing and opening control.

[0031] The digital switch signal acquisition is used to acquire three break signals: corresponding to the three-phase breaks of circuit breaker A, B, and C. When the break is closed, the output is low level, and when it is open, the output is high level. The acquisition control module receives the level signals through the DIO interface and records the opening and closing times of the break, which is used to calculate the asynchrony of the three-phase tripping. Digital switch quantity acquisition is used to acquire external trigger closing and opening voltage signals: When the system adopts external trigger mode, such as when the circuit breaker control cabinet issues a closing and opening command, the acquisition control module receives the external trigger signal through the DIO interface and starts signal acquisition synchronously.

[0032] The analog signal acquisition module collects signals from three displacement sensors: those corresponding to the moving contacts of the A, B, and C phases of the circuit breaker. These sensors output analog voltage signals, which are then converted into digital signals by the acquisition and control module via an analog interface. The module records the displacement over time, thus covering the core signals for testing the mechanical characteristics of high-voltage circuit breakers. This overcomes the limitation of traditional testers that only acquire single-phase signals, meeting the testing requirements of high-end circuit breakers.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mechanical property testing system, characterized in that: Includes a cabinet and a host computer, a switch mechanical characteristic tester, a PLC controller, an AC voltage regulator, at least two DC adjustable power supplies and voltage control circuits installed inside the cabinet; The host computer is equipped with dual network ports, including a first network port and a second network port. The first network port is connected to the switch mechanical characteristic tester and the PLC controller, and the second network port is a reserved interface for accessing the MES information system. The PLC controller is electrically connected to the AC voltage regulator and the voltage control circuit respectively. The PLC controller is used to control the voltage boosting and bucking actions of the AC voltage regulator, as well as to control the power selection and shutdown of the voltage control circuit. The voltage control circuit is electrically connected to the two DC adjustable power supplies and the AC voltage regulator respectively. The switch mechanical characteristic tester is used to collect the break signal, opening and closing current signal and position sensor signal of the test object, and transmit the collected signals to the host computer for analysis.

2. The mechanical characteristic testing system according to claim 1, characterized in that: The switch mechanical characteristic tester includes an acquisition and control module, which supports 4-channel analog signal acquisition, 4-channel analog signal output, and 16-bit DIO digital signal input and output. The maximum rate of analog signal acquisition and output is 500ksps.

3. The mechanical characteristic testing system according to claim 2, characterized in that: The acquisition and control module is used to realize digital switch quantity acquisition, analog quantity acquisition and digital output. The digital switch quantity acquisition includes the acquisition of 3 disconnection signals and external trigger closing and opening voltage signals. The analog quantity acquisition includes the acquisition of 3 displacement sensor signals and 1 coil current signal. The digital output is used for closing and opening control.

4. The mechanical characteristic testing system according to claim 1, characterized in that: The cabinet is also equipped with a switch and a serial server, and the switch is connected to the first network port of the host computer.

5. The mechanical characteristic testing system according to claim 1, characterized in that: A loop resistance tester can also be optionally installed inside the cabinet, and the loop resistance tester is connected to the first network port of the host computer.

6. The mechanical characteristic testing system according to claim 1, characterized in that: The host computer sends control commands to the PLC controller, which in turn drives the voltage control circuit to switch the output paths of the closing and opening voltage and the energy storage voltage.

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