CN109490587B - Relay protection single board test system and single board connection and disconnection device - Google Patents
Relay protection single board test system and single board connection and disconnection device Download PDFInfo
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- CN109490587B CN109490587B CN201811428063.1A CN201811428063A CN109490587B CN 109490587 B CN109490587 B CN 109490587B CN 201811428063 A CN201811428063 A CN 201811428063A CN 109490587 B CN109490587 B CN 109490587B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Veneer Processing And Manufacture Of Plywood (AREA)
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Abstract
The invention relates to a relay protection single board test system and a single board connecting and disconnecting device thereof. The labor cost and the time cost are well reduced, the participation degree of testers in the test process is reduced, the test time is shortened, the working efficiency of the testers is improved, the technical threshold requirements of the testers are reduced, and reliable, efficient and totally-enclosed automatic test is realized.
Description
Technical Field
The invention relates to a relay protection single board test system and a single board connection and disconnection device thereof.
Background
The relay protection device plays an important role in a power system, when electrical equipment encounters a fault and an abnormal working state, the relay protection device can automatically, rapidly and selectively act on a circuit breaker and remove the fault equipment from the system, the fault-free equipment is guaranteed to continue to operate normally, the accident is limited to the minimum range, and the operation reliability is improved.
Before the relay protection device is assembled into a box, a function test of single-board fault elimination is firstly carried out, which is the basis and guarantee of reliable operation of the relay protection device. The single board refers to an electronic component plug-in unit which is installed in the device after a printed board is welded with a corresponding electronic component and can independently complete a certain function, the single board to be tested which needs to be subjected to troubleshooting refers to a CPU board in the relay protection device, and the single board mainly realizes input and output and analog quantity acquisition. During the function test, it is mainly detected whether the single board hardware is intact, whether the function is complete, whether the performance index is reduced, etc. In a word, the reliability of the single board is the premise and the basis for the normal operation of the relay protection device.
At present, automatic test systems with different degrees appear in the aspect of relay protection device testing, and the automation degree in the aspect of single-board automatic testing is not high. For example, an automatic testing system of a relay protection device and a testing tool special for the system are disclosed in chinese patent application with publication No. CN102879663A, wherein the testing tool is an electrical connector adapted to a shape of a back plate of a device to be tested, a connecting terminal at one side is used for connecting subsequent equipment through a wiring, a connecting terminal at the other side is a pin adapted to a wiring terminal of the back plate of the device to be tested, a slide rail is provided at the bottom of the testing tool, a sliding platform is provided on the slide rail, the device to be tested is mounted on the sliding platform, and the sliding platform is driven by a driving device to move along the slide rail. Structural style can realize like this with the contact pin whole integration of the device to be tested adaptation grafting on a test fixture, need connect when taking out stitches directly through drive arrangement drive sliding platform remove can, it is more convenient when connecting the operation of taking out stitches like this, connect the work load of taking out stitches less, can be to the assembly line test one by one of different devices to be tested moreover.
In the prior art, the single board test usually adopts a manual test mode, the single board to be tested is inserted into the test device, and the input and output amount is simulated by adopting the interface inching short circuit on the terminal strip to complete the test. Generally, one side of a single board to be tested is provided with a plurality of ethernet connectors and flat probes for connecting with external equipment to realize communication so as to transmit data; the other side is provided with a plurality of cusp interfaces which are connected with the corresponding power supply and other single boards of the testing device to realize information interaction, and the cusp interfaces are mainly used for realizing the input and output, the acquisition of analog quantity and the like. In the actual test process, an operator is required to manually connect and disconnect the interfaces and the joints. The following problems are encountered during manual testing: 1. the testing excessively depends on personal ability, a plurality of testing items are provided, wiring is scattered, and a debugger needs to use a universal meter to test each debugging item; when the short circuit is inching, the problems of 'missing item and missing item' of test items or short circuit errors and device damage easily occur, the installation and the disassembly of the circuit have more cautions, the deviation can occur without paying attention, the line changing time is long, and static electricity is easily generated. 2. The veneer is manually plugged, static electricity is easily led to damage devices, and meanwhile, when the veneer to be tested is plugged into the testing device, the veneer is easily impacted with other board cards, so that the devices on the back of the veneer are scraped. 3. The test efficiency is low, the test workload is large, and the labor cost is high.
If the wiring structure of the test tool is applied to the single board test process, the problem of automatic wire connection and disconnection of one side of the single board to be tested can be solved, but because the single board to be tested needs to be connected and disconnected on the opposite sides in the test process, the problem of manual intervention for wire connection and disconnection can still be avoided in the actual single board test application process, so that the wire connection and disconnection of the single board to be tested are greatly influenced by operators, and more uncertain factors exist.
Disclosure of Invention
The invention aims to provide a relay protection single board test system, which aims to solve the problems of large influence of human intervention, more uncertain factors, low test efficiency and poor reliability when testing a single board to be tested in the prior art; the invention also aims to provide a single board connecting and disconnecting device of the relay protection single board testing system, so as to solve the problems of large influence of human intervention, multiple uncertain factors, low testing efficiency and poor reliability caused by complicated manual disconnecting in the prior art.
In order to achieve the purpose, the technical scheme of the single plate connecting and disconnecting device is as follows:
the veneer connecting and disconnecting device comprises a base, wherein the base is provided with a test board and two movable connecting seats, the two movable connecting seats are respectively arranged on two opposite sides of the test board and are in guide fit with the base, and one side, close to the test board, of each movable connecting seat is provided with a connector used for being connected with a veneer to be tested in an inserting mode.
The beneficial effects are that: compared with the prior art, the single board connecting and disconnecting device has the advantages that the base is provided with the test board, the two opposite sides of the test board are respectively provided with the movable connecting seats which are matched with the base in a guiding way, and the movable connecting seats are provided with the connectors which are used for being connected with the single board to be tested in an inserting way, in the actual operation process, the single board to be tested does not need to be connected and disconnected one by one manually, only the single board to be tested is clamped on the test board, the movable connecting seats are operated, the connectors of the movable connecting seats are integrally connected with the corresponding connecting terminals on the single board to be tested in an inserting way in the action process of the movable connecting seats, further, the signal conducting connection between the test equipment and the single board to be tested is realized, the structure is simple, the single boards to be tested can be tested one by one time only through manual wiring, and the operation is convenient, the lines are clear. The labor cost and the time cost are well reduced, the participation degree of testers in the test process is reduced, the test time is shortened, the working efficiency of the testers is improved, the technical threshold requirements of the testers are reduced, the reliable, efficient and totally-enclosed automatic test is realized, test reports and product qualification certificates can be produced according to the test results, and the traceability of the test results is realized.
Furthermore, in order to facilitate the synchronous control of the two movable connecting seats, the two movable connecting seats are connected with each other through a transmission mechanism in a synchronous and reverse transmission manner.
Furthermore, in order to simplify the structure and facilitate the operation, the transmission mechanism is a screw nut mechanism, and the screw rod of the screw nut mechanism is opposite to the thread turning direction matched with the two movable connecting seats to form a bidirectional screw rod.
Furthermore, in order to realize the automatic control of the action of the movable plate, the transmission mechanism is in transmission connection with a driving motor.
The technical scheme of the relay protection single board test system is as follows:
the relay protection single board testing system comprises testing equipment and a connecting and disconnecting device, wherein the connecting and disconnecting device comprises a base, a testing table and movable connecting seats are arranged on the base, the movable connecting seats are arranged on two opposite sides of the testing table respectively and are in guide fit with the base, one side, close to the testing table, of each movable connecting seat is provided with a connector used for being connected with a single board to be tested in an inserting mode, and the connectors are connected with the testing equipment.
The beneficial effects are that: compared with the prior art, the relay protection single board testing system has the advantages that the base of the single board connecting and disconnecting device is provided with the testing table, the two opposite sides of the testing table are respectively provided with the movable connecting seats which are matched with the base in a guiding way, and the movable connecting seats are provided with the connectors which are used for being connected with the single board to be tested in an inserting way, so that the single board to be tested does not need to be connected and disconnected one by one manually in the actual operation process, only the single board to be tested needs to be clamped on the testing table, the movable connecting seats are operated, the connectors of the movable connecting seats are integrally connected with the corresponding connecting terminals on the single board to be tested in an inserting way in the action process of the movable connecting seats, the signal conduction connection between the testing equipment and the single board to be tested is realized, the structure is simple, and the single boards to be tested can be tested one by one time only through manual connection, convenient operation and clear circuit. The labor cost and the time cost are well reduced, the participation degree of testers in the test process is reduced, the test time is shortened, the working efficiency of the testers is improved, the technical threshold requirements of the testers are reduced, the reliable, efficient and totally-enclosed automatic test is realized, test reports and product qualification certificates can be produced according to the test results, and the traceability of the test results is realized.
Furthermore, in order to facilitate the synchronous control of the two movable connecting seats, the two movable connecting seats are connected with each other through a transmission mechanism in a synchronous and reverse transmission manner.
Furthermore, in order to simplify the structure and facilitate the operation, the transmission mechanism is a screw nut mechanism, and the screw rod of the screw nut mechanism is opposite to the thread turning direction matched with the two movable connecting seats to form a bidirectional screw rod.
Furthermore, in order to realize the automatic control of the action of the movable plate, the transmission mechanism is in transmission connection with a driving motor.
Furthermore, in order to realize full-automatic control in the test process, the test system further comprises a controller, a detection switch for detecting the in-position state of the tested single board is arranged on the test board, the detection switch is connected with the controller, and the controller can control the driving motor and the test equipment to be started and stopped according to signals of the detection switch.
Furthermore, in order to realize the automatic control of loading and unloading, the test system further comprises an automatic loading and unloading device, wherein the automatic loading and unloading device comprises a loading and unloading manipulator, the loading and unloading manipulator is connected with the controller, the controller can control the loading and unloading manipulator to load when detecting the vacant position of the test bench, and the controller can control the loading and unloading manipulator to unload when the test of the single plate to be tested on the test bench is finished.
Drawings
Fig. 1 is a schematic structural diagram of a specific embodiment of a single board connection/disconnection apparatus in a relay protection single board test system according to the present invention;
fig. 2 is a schematic diagram of a material tray structure in the relay protection single board test system of the invention;
fig. 3 is a test flow chart of the relay protection single board test system of the present invention.
Description of reference numerals: 1-a bottom plate; 2-a support seat; 3-a screw nut mechanism; 4-a stepper motor; 5-a movable plate; 6-limit switch; 7-a microswitch; 8-material tray; 9-a signal adapter; 21-a positioning pin; 51-fast plug ethernet interface; 52-flat head elastic probe interface; 53-tipped probe; 81-positioning grooves; 82-a wedge-shaped structure; 91-testing the plug terminals.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 2, the relay protection single board test system of the present invention includes a test device and a single board connecting and disconnecting device, wherein the single board connecting and disconnecting device is mainly used for positioning and connecting a single board to be tested, the single board connecting and disconnecting device includes a bottom board 1 and a support base 2 disposed on the bottom board 1, the support base 2 is a U-shaped board structure reversely buckled on the bottom board 1, a U-shaped extending direction of the support base 2 is along a front-back direction, an upper end of the support base 2 forms a test bench for positioning and supporting the single board to be tested, and the bottom board 1 forms a base for fixing a lower end of the test bench and supporting other components.
Meanwhile, the corresponding front side and the rear side of the bottom plate 1, which are positioned on the supporting seat 2, are provided with movable plates 5, one side of each movable plate, which is close to the test board, is provided with a connector for being plugged with a single plate to be tested, the connector is connected with test equipment to realize signal transmission, and the two movable plates are assembled on the base in a guiding manner to form a movable connecting seat. A screw nut mechanism 3 is installed in a U-shaped plate opening of the support base 2 on the bottom plate 1, the screw nut mechanism 3 is assembled on the bottom plate 1 in a guiding manner along the front-back direction, a screw rod of the screw nut mechanism 3 is provided with two sections of threads with opposite rotating directions along the axial direction, so that the screw rod of the screw nut mechanism 3 is formed into a bidirectional screw rod, two nuts are arranged at opposite rotating positions on the screw rod, and the movable plate 5 is fixed on the two nuts of the screw nut mechanism 3 in a guiding manner along the front-back direction. The screw nut mechanism 3 is connected with a stepping motor 4, the stepping motor 4 constitutes a driving motor for driving a screw of the screw nut mechanism 3 to rotate, the stepping motor 4 drives the screw of the screw nut mechanism 3 to rotate, and then drives the two nuts to move in the front-back direction in an opposite or back-to-back direction, and finally drives the two corresponding movable plates 5 to move in the front-back direction in an opposite or back-to-back direction. The structure arrangement form can directly drive the two movable plates 5 to act through the stepping motor 4, driving parts are reduced, transmission is stable, the moving stroke accuracy of the two movable plates 5 is high, and moving consistency is good.
The screw pitches of the two thread sections of the screw nut mechanism 3 in this embodiment may be the same or different, that is, only the two thread sections need to be ensured to synchronously move, and the speed of the movable plate 5 in the moving process is not limited, and may be the same speed or different. The screw nut mechanism 3 is mainly used for realizing synchronous and reverse transmission connection of the two movable plates, and the two movable plates 5 are driven to synchronously act through the action of one mechanism so as to realize synchronous splicing and matching of the two movable plates and the single plate to be tested in the process of connecting and disconnecting. In other embodiments, a crank-slider mechanism or other transmission mechanisms available in the prior art may be used instead to implement the synchronous and reverse transmission connection, when the crank-slider mechanism is used, the crank may be provided with two overhanging ends extending away from each other, two sliders may be provided, and are respectively provided on two opposite sides of the crank, and the corresponding movable plate is provided on the slider, and in the process of rotating the crank, the two sliders are driven by the crank to implement the opposite or opposite synchronous motion, wherein the crank may be driven by a manual operation or a motor. In other embodiments, two lead screws with opposite single rotation directions can be arranged and connected through a coupler to realize transmission, other connection modes such as gear matching and the like can be adopted to replace the coupler to realize transmission matching of the two lead screws, the two lead screw nut mechanisms can be driven to rotate by the stepping motor respectively, and no transmission relation exists between the two lead screw nut mechanisms. In other embodiments, the lead screw nut mechanism may be manually driven directly by a hand wheel disposed at one end of the lead screw.
The relay protection single board test system also comprises a PLC which is in control connection with the stepping motor 4 and controls the stroke of the movable plate 5 by adjusting the rotating torque and the rotating steps of the corresponding screw rod, and the PLC forms a controller in the test system. The mode of adopting the PLC to control the stepping motor 4 is consistent with the mode of controlling the rotation of the stepping motor by the PLC in the prior art and is not expanded in detail. The lead screw of the lead screw nut mechanism 3 is controlled by the PLC to rotate, so that the corresponding nut is driven to move, the movable plate 5 is further driven to move, and the quick connection and disconnection in the test process of the single board to be tested are realized.
In addition to the PLC controlling the moving stroke of the movable plate 5, in order to ensure the safety of the testing process, in this embodiment, two limit switches 6 are further disposed on the bottom plate 1, and the limit switches 6 are respectively fixed on the front side and the rear side of the supporting seat 2 and are respectively used for stopping and limiting the two movable plates 5. The travel of the movable plates 5 is limited again through the limit switch 6, the in-place control that the two movable plates 5 move oppositely to the connection between the connector and the connecting terminal of the single plate to be tested is accurately realized, and the problems of short circuit, poor contact and the like between the single plate to be tested and the connector of the movable plates 5 are avoided again by using the in-place control mode of the limit switch 6.
The movable plate 5 located on the front side is defined as a front movable plate, the movable plate 5 located on the rear side is defined as a rear movable plate, the front movable plate and the rear movable plate mainly achieve connection and disconnection with the single plate to be tested, and a plurality of connectors used for achieving signal transmission in a matched and connected mode with connecting terminals on the corresponding side of the single plate to be tested are arranged on the front movable plate and the rear movable plate respectively. The movable plate 5 is made of a rectangular nylon block, and the connector comprises a wiring port corresponding to the single plate to be tested and a conductive probe. Specifically, the connector of the front movable plate includes a modified fast-plug ethernet interface 51 corresponding to the board to be tested, and the fast-plug ethernet interface 51 is used for being in plug-in fit with an ethernet port on the front side of the board to be tested; and a flat-head elastic probe interface 52 which is used for being in adaptive splicing with a flat-head probe at the front side of the single board to be tested is also arranged beside the fast-plugging Ethernet interface 51 on the front movable plate, and each connector on the front movable plate mainly realizes the communication between the single board to be tested and external equipment and is used for transmitting the acquired signal to a processing terminal for analysis and comparison. The connector of the rear movable plate comprises a pointed probe 53 which is used for being matched with a connection jack of a connector end of the single plate to be tested in a plugging mode, power supply of the single plate to be tested is achieved, information interaction with other single plates of the system is achieved, and test signal collection including input and output, analog quantity and the like is achieved. When front and back board and back fly leaf are close to relatively, directly peg graft with the whole adaptation of the veneer that awaits measuring of location on supporting seat 2, do not need the manual work to carry out wiring work one by one, easy operation saves the manual work, and wiring and detection efficiency are high moreover.
To supporting seat 2, in this embodiment, supporting seat 2 adopts the plane aluminum alloy metal to make, be provided with the location portion that is used for fixing a position the veneer that awaits measuring on supporting seat 2, it is concrete be provided with locating pin 21 that extends from top to bottom on the up end of supporting seat 2, locating pin 21 has threely, and it arranges on supporting seat 2 to be triangle-shaped, removable location has charging tray 8 simultaneously on supporting seat 2, locating pin 21 sets up the alignment that can realize charging tray 8, charging tray 8 and the 21 cartridge cooperation of locating pin that corresponds and fix a position on supporting seat 2, be equipped with the constant head tank 81 that is used for the fixed veneer that awaits measuring on charging tray 8. If the veneer to be tested is directly placed on the supporting seat 2, the front movable plate and the rear movable plate move towards the supporting seat 2 and complete the wiring process, and the front movable plate and the rear movable plate have certain impact force on the veneer to be tested, so that the veneer to be tested can be pressed and arched, and the veneer to be tested is damaged. Simultaneously in this embodiment, the constant head tank 81 that is provided with in the charging tray 8 is unanimous with the face size of the veneer that awaits measuring, and constant head tank 81 extends along the fore-and-aft direction, and when the veneer that awaits measuring is fixed a position, direct veneer that will await measuring inserts to the constant head tank 81 along the direction from the past backward in can realize fixing a position. In addition, a signal adapter 9 is arranged at the rear end of the positioning groove 81 on the tray 8 in a blocking manner, and a certain number of adapter contact structures are arranged on the signal adapter 9 side by side at intervals. The signal adaptor 9 comprises a printed board and an adaptor board connected to the printed board, wiring is carried out through the printed board, a connecting terminal of a single board to be tested is connected with the rear movable board through the signal adaptor 9, specifically, a single board plug terminal used for being in plug connection with a rear end connecting terminal of the single board to be tested is arranged on the front side face of the signal adaptor 9, a test plug terminal 91 used for being connected with test equipment is arranged on the rear side face of the signal adaptor 9, the distance between the test plug terminals 91 is larger than that of the single board plug terminal, so that the distance between the rear end connecting terminals of the single board to be tested can be amplified, the signal adaptor 9 is in close contact with the rear end connecting terminal of the single board to be tested in a hole-hole connection mode, and the arrangement of the pointed probes 53 of the rear movable board and the close contact with the signal adaptor 9 are. Because the rear end connecting terminal interval of the veneer to be tested is smaller, the arrangement is denser, the higher requirement on the plugging precision is required for directly plugging the rear movable plate and the veneer to be tested, and the design mainly aims at carrying out secondary protection on the rear end connecting terminal of the veneer to be tested and reducing the requirement on the plugging precision. Simultaneously in this embodiment, the design of wedge structure 82 is adopted to the both sides of charging tray 8, conveniently picks charging tray 8 and goes up unloading operation.
Simultaneously still be equipped with micro-gap switch 7 in supporting seat 2 upper end one side, this micro-gap switch 7 constitutes and is used for detecting whether there is the detection switch that charging tray 8 placed ON supporting seat 2, and this micro-gap switch 7 is connected with foretell PLC, and in actual use, when charging tray 8 placed ON supporting seat 2, micro-gap switch becomes ON by OFF, when charging tray 8 took OFF from supporting seat 2, micro-gap switch becomes OFF by ON. The micro switch is arranged, so that the PLC can monitor signals of the micro switch to control the start and the stop of the stepping motor 4 and the test equipment in the actual detection process. Simultaneously, the test system further comprises a feeding and discharging device, the feeding and discharging device comprises a robot, the robot is provided with a feeding and discharging manipulator, the PLC is connected with the robot, the PLC can control the feeding and discharging manipulator to feed when detecting that the microswitch 7 is in an OFF state, namely no material tray 8 is arranged on the supporting seat 2, and the feeding and discharging manipulator to feed when detecting that the test of the veneer to be tested is in an end state, so that the full-automatic test and the feeding and discharging process without human intervention are realized. In this embodiment, through the signal of the microswitch 7 received by the controller, when the microswitch is ON, the robot does not act, and when the microswitch is OFF, the robot receives the signal of the microswitch 7, and grasps and positions the next material tray 8 with the single board to be detected onto the supporting seat 2, thereby realizing the automatic loading and unloading of each single board to be detected.
The test flow of the relay protection single board test system is shown in fig. 3, and mainly includes the following steps:
(1) preparation before automatic testing: firstly, the robot is powered on, the reset action is completed, namely, the mechanical arm of the robot moves to a test waiting area, the PLC which controls the motion of the motor is powered on, and the single plate to be tested is placed on the material tray 8.
(2) Automatic feeding: after the PLC is electrified, the state of the microswitch is automatically detected, if the on-OFF state is OFF, the situation that the supporting seat 2 is temporarily free of the single plate to be detected is indicated, the PLC uploads the signal to the robot controller, and after the robot controller receives the signal, the mechanical arm begins to a region to be detected to grab the material tray 8 filled with the single plate to be detected, and the material tray 8 is placed on the supporting seat 2, so that the feeding process is automatically completed. Wherein micro-gap switch 7 is the switch that can realize the switch switching by receiving charging tray 8 gravity to push down, and the control signal transmission between PLC and micro-gap switch 7 and PLC and the robot is prior art, no longer expandes in detail.
(3) And (3) comprehensive testing: when the state of the microswitch ON the supporting seat 2 is changed from OFF to ON, the screw rod connected with the stepping motor 4 rotates forward to drive the movable nut to move, the front movable plate and the rear movable plate move towards the supporting seat 2, and the connector ON the movable plate 5 is integrally matched and plugged with the corresponding connecting terminal ON the veneer to be tested, so that the wiring process is completed. And the PLC uploads the signal after the wiring is finished to the PC, and the PC starts automatic testing and finishes the items of the input test, the output test, the analog quantity test, the network port test and the like in sequence.
(4) Automatic blanking: after the PC finishes testing, a testing finishing signal is transmitted to the PLC, after the PLC receives the signal, the PLC controls the screw rod of the screw rod nut mechanism 3 to rotate reversely to drive the nut to move, and the front movable plate and the rear movable plate move back to the supporting seat 2, so that the wire removing process is finished. And the PLC uploads a stitch removing completion signal to the robot, the robot controls the mechanical arm to move to the supporting seat 2, the charging tray 8 with the tested veneer is grabbed, the mechanical arm is rotated to the blanking area, and the charging tray 8 is placed in the blanking area to complete the blanking process.
The whole testing process is fully automated in operation, manual intervention cannot be achieved, and the detection efficiency is high. External equipment is not directly contacted with the single board to be tested at all, and damage of the device due to external force or static electricity is effectively prevented.
In other embodiments, the movable plate can be directly pushed to move manually without arranging a screw nut mechanism; a material tray is not arranged on the supporting seat, and the veneer to be tested is directly placed on the supporting seat; the positioning between the tray and the support seat can be realized by adopting positioning grooves and positioning blocks which are respectively arranged on the tray and the support seat; the microswitch on the supporting seat is directly replaced by the light-sensitive switch, when the material tray is placed on the supporting seat, the light-sensitive switch is turned off when the light is lost, and when the material tray leaves, the light-sensitive switch is turned on by the optical fiber; in other embodiments, the controller is not arranged, and the driving motor and the testing equipment are both manually started and shut down, and the material is manually loaded and unloaded.
In the embodiment of the single board connecting and disconnecting device according to the present invention, the structure of the single board connecting and disconnecting device is the same as that of the single board connecting and disconnecting device in the embodiment of the relay protection single board test system, and is not expanded in detail.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428063.1A CN109490587B (en) | 2018-11-27 | 2018-11-27 | Relay protection single board test system and single board connection and disconnection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811428063.1A CN109490587B (en) | 2018-11-27 | 2018-11-27 | Relay protection single board test system and single board connection and disconnection device |
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| CN109490587A CN109490587A (en) | 2019-03-19 |
| CN109490587B true CN109490587B (en) | 2021-08-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI685165B (en) * | 2019-04-08 | 2020-02-11 | 大陸商東莞寶德電子有限公司 | Signal detecting circuit for micro switch and method thereof |
| CN110618397B (en) * | 2019-10-23 | 2025-06-10 | 浙江八达电子仪表有限公司 | Module power-on detection device based on ubiquitous power Internet of Things smart energy meter |
| CN111208371B (en) * | 2020-01-16 | 2021-11-26 | 南京擎力电气科技有限公司 | Detection device for relay protection device of power system |
| CN115902501B (en) * | 2023-02-28 | 2023-06-16 | 山东中兴科技开发有限公司 | Test equipment for distribution box |
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