CN109490763B - Universal testing device and testing method for single board of relay - Google Patents
Universal testing device and testing method for single board of relay Download PDFInfo
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- CN109490763B CN109490763B CN201811086887.5A CN201811086887A CN109490763B CN 109490763 B CN109490763 B CN 109490763B CN 201811086887 A CN201811086887 A CN 201811086887A CN 109490763 B CN109490763 B CN 109490763B
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
The invention discloses a universal testing device and a testing method for a single board of a relay, which comprises the following steps: the external connection unit is provided with a general IO interface connected with the tested relay single board; the input and output unit is connected with the external connection unit and is provided with a plurality of IO unit modules, each IO unit module comprises a power supply, a first driving circuit, a second driving circuit and a return detection circuit, the first driving circuit is used for driving the tested relay to be high or low in a driving mode, the return detection circuit is used for detecting the contact state of the tested relay, the first driving circuit is connected with the first output switch, and the second driving circuit is connected with the second output switch; the control unit is used for controlling the input and output unit and judging the state of the relay to be tested; the human-computer interaction unit is used for inputting the type of the relay single board to be tested, matching the relay connection mode according to the type of the relay single board, selecting a corresponding test method and sending the test method to the control unit; and the communication unit is used for communication connection between the human-computer interaction unit and the control unit. The invention can be adapted to different relay single boards.
Description
Technical Field
The invention relates to the technical field of electrical control, in particular to a relay testing technology.
Background
The single board of the cage type mounting structure is generally applied to control systems such as an industrial control system, a rail transit control system, instruments and meters and the like. In these control system, can use the relay in a large number, for the convenience of installation, these relays use PCB board mounting means usually, and the structure adopts the plug structure of quick-witted cage. The relay single board mentioned herein is a board-clamped type relay single board which adopts a cage type mounting structure and has an external output which is a board-to-board connector output.
The board card type single relay board is widely used, and in the production and use processes of the single relay boards, a test tool needs to be used for testing whether the single relay board works normally. Because the relay single boards are widely used, even in the same system, different relay single boards can appear due to different definitions of signals of the external connectors, different signal loops and the like, and several or even more than ten different types of relay single boards can appear in one system.
The existing relay single board test generally adopts a special test tool for each kind of relay single board, and a common control product has several kinds or even dozens of relay boards, and each kind of relay board needs one test tool.
Because the interface definition of the relay board to be tested varies widely, the existing solution usually designs a dedicated test tool for each type of relay board, including: the method is characterized in that a special test tool is used for each relay board to be tested, a special connector slot is designed for each relay single board, or a special connector and a connecting wire are used for each relay board to carry out signal switching. The existing schemes are all dedicated and customized scheme test tools, and if a new relay board is developed, a new test tool needs to be developed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a universal testing device for a single relay board, which is suitable for testing various single relay boards.
In order to solve the technical problems, the invention adopts the following technical scheme: a universal testing device for a single board of a relay comprises:
the external connection unit is provided with a general IO interface connected with the tested relay single board;
the input and output unit is connected with the external connection unit and is provided with a plurality of IO unit modules, each IO unit module comprises a power supply, a first driving circuit, a second driving circuit and a return detection circuit, the first driving circuit is used for driving the tested relay to be high or low in a driving mode, the return detection circuit is used for detecting the contact state of the tested relay, the first driving circuit is connected with the first output switch, and the second driving circuit is connected with the second output switch;
the control unit is used for controlling the input and output unit and judging the state of the relay to be tested;
the human-computer interaction unit is used for inputting the type of the relay single board to be tested, matching the relay connection mode according to the type of the relay single board, selecting a corresponding test method and sending the test method to the control unit;
and the communication unit is used for communication connection between the human-computer interaction unit and the control unit.
Preferably, the power supply has a short-circuit protection function.
Preferably, the voltage threshold of the back detection circuit is half of the power supply voltage.
The invention also provides a relay single board testing method, which comprises the following steps,
the tested relay single board is connected with the testing device through the universal IO interface of the external connection unit;
inputting the type of a single board of the relay to be tested through a man-machine interaction unit, selecting a corresponding test method according to a relay connection mode matched with a database, and sending the test method to a control unit through a communication unit;
the control unit controls the input and output unit to select the corresponding IO unit module to work, and tests the tested relay, and the specific method comprises the following steps:
firstly, the control unit sequentially outputs a driving high signal and a driving low signal by selecting a driving circuit of the IO unit module so as to enable the relay to be in a suction state;
then, the control unit selects a driving circuit of the IO unit module to output a driving high signal, judges a return detection signal of the IO unit module, if the collected external is high level, the contact of any relay is normally attracted, if the collected signal is low level, the relay is not attracted, and after the operation is finished, the relay to be tested is in a disconnected state;
and finally, reading the return inspection signal of the IO unit module again, if the collected signal is low level, considering that the relay is in a contact disconnection state, and if the two tests pass at the same time, considering that the relay functions normally.
The invention adopts a universal IO interface, so long as the connector types are consistent and the driving voltages of the tested relay are consistent, the invention can be adapted to different relay single boards, and the input and output unit is controlled according to the input type of the tested relay single board so as to be adapted to different relay single boards.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic diagram of an input/output unit;
fig. 3 is a schematic diagram of a relay single board testing method.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment, referring to fig. 1 to 3, a universal testing apparatus for a single board of a relay includes: the external connection unit is provided with a general IO interface connected with the tested relay single board;
the input and output unit is connected with the external connection unit and is provided with a plurality of IO unit modules, each IO unit module comprises a power supply, a first driving circuit, a second driving circuit and a return detection circuit, the first driving circuit and the second driving circuit are used for driving the relay to be tested to drive the relay to be tested to be high or low, the return detection circuit is used for detecting the contact state of the relay to be tested, the first driving circuit is connected with the first output switch, and the second driving circuit is connected with the second output switch;
the control unit is used for controlling the input and output unit and judging the state of the relay to be tested;
the human-computer interaction unit is used for inputting the type of the relay single board to be tested, selecting a corresponding test method according to the relay connection mode matched with the type of the relay single board and sending the test method to the control unit;
and the communication unit is used for communication connection between the human-computer interaction unit and the control unit.
The external connection unit uses a universal IO interface, so that the same test device can test different types of relay boards.
The two driving circuits are used for connecting the control unit and the output switch and have input and output functions. Taking the first input/output unit as an example, the first driving circuit and the second driving circuit respectively control the output switches K1 and K2. The driving circuit may specifically refer to the prior art, and may be implemented by a transistor, an integrated circuit, or the like. The first driving switch K1 is connected with the power supply and the output end, the second driving switch K2 is connected with the power supply and the ground, and the driving switch can be composed of transistors such as MOSFET triodes and the like or integrated IC.
The power is used for controlling external relay, and voltage and relay drive voltage phase-match, the power possesses short-circuit protection function simultaneously, when K1, K2 are closed simultaneously or IO signal short circuit to ground, can effectively protect the circuit, can not lead to the circuit to damage.
Each rechecking circuit judges the voltage input by IO, the threshold value of the detection judgment voltage is half of the power supply voltage, and the judgment result of the rechecking circuit is output to the control unit.
Those skilled in the art can understand that the communication unit may be a wired connection mode such as a general IO port, a serial port, and an ethernet, or may use a wireless connection mode such as bluetooth and WIFI.
In a second embodiment, a method for testing a single board of a relay includes the following steps:
the tested relay single board is connected with the testing device through the universal IO interface of the external connection unit;
inputting the type of the relay single board to be tested through a man-machine interaction unit, obtaining a corresponding relay connection mode according to a database matching mode, and selecting a corresponding test mode according to an interface of the relay board (different relay single boards have different output interfaces, and the output interfaces need to use corresponding output high level or low level or be configured into an input state).
The control unit is closed by K3 of IO cell 2 of the drive circuit, IO2 is connected to the power supply, and a drive high signal is input.
The control unit is closed by K6 of IO cell 3 of the drive circuit, IO3 is connected to ground, and outputs a drive low signal.
After the two operations, the relay should be in the pull-in state.
The control unit closes the K1 output drive switch of IO cell 1, at which time IO1 should be in a drive high state.
The control unit judges the return inspection signal of the IO unit 4, if the collected external signal is high level, the contact of any relay is normally attracted, and if the collected signal is low level, the relay is considered not to be attracted.
After the above operation is completed, K3 of IO cell 2 is turned off, and the relay should be turned off.
And reading the return detection signal of the IO unit 4 again, and if the collected signal is low level, considering that the relay is in a contact disconnection state.
And if the two tests pass simultaneously, the relay is considered to be normal in function.
It can be understood by those skilled in the art that if the relay contacts are different, the test steps are the same, the criterion for judging whether the relay is normal is different, and the criterion for judging whether the relay is normal can refer to the prior art.
Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.
Claims (3)
1. A universal testing device for a single board of a relay is characterized by comprising:
the external connection unit is provided with a general IO interface connected with the tested relay single board;
the input/output unit is connected with the external connection unit and is provided with a plurality of IO unit modules, each IO unit module comprises a power supply, a first driving circuit and a second driving circuit, the first driving circuit and the second driving circuit are used for outputting a driving high signal or a driving low signal to drive the relay to be tested, and a return detection circuit is used for detecting the contact state of the relay to be tested, the first driving circuit is connected with the first output switch, and the second driving circuit is connected with the second output switch;
the control unit is used for controlling the input and output unit and judging the state of the relay to be tested;
the human-computer interaction unit is used for inputting the type of the relay single board to be tested, matching the relay connection mode according to the type of the relay single board, selecting a corresponding test method and sending the test method to the control unit;
the communication unit is used for communication connection between the human-computer interaction unit and the control unit;
the relay single board testing method adopting the relay single board universal testing device comprises the following steps,
the tested relay single board is connected with the testing device through the universal IO interface of the external connection unit;
inputting the type of a single board of the relay to be tested through a man-machine interaction unit, selecting a corresponding test method according to a relay connection mode matched with a database, and sending the test method to a control unit through a communication unit;
the control unit controls the input and output unit to select the corresponding IO unit module to work, and tests the tested relay, and the specific method comprises the following steps:
firstly, the control unit selects a first drive circuit and a second drive circuit of the IO unit module, the first drive circuit outputs a drive high signal, and the second drive circuit outputs a drive low signal in sequence, so that the relay is in a pull-in state;
then, the control unit selects a first driving circuit of the IO unit module to output a driving high signal, judges a return detection signal of the IO unit module, if the collected external high level is high, considers that a contact of the relay is normally attracted, if the collected signal is low level, considers that the relay is not attracted, and after the operation is finished, the tested relay is in a disconnected state;
and finally, reading the return inspection signal of the IO unit module again, if the collected signal is low level, considering that the relay is in a contact disconnection state, and if the two tests pass at the same time, considering that the relay functions normally.
2. The universal testing device for the single plates of the relay according to claim 1, wherein the power supply has a short-circuit protection function.
3. The universal testing device for the single plates of the relay according to claim 1, wherein the voltage threshold of the back detection circuit is half of the power supply voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811086887.5A CN109490763B (en) | 2018-09-18 | 2018-09-18 | Universal testing device and testing method for single board of relay |
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| CN201811086887.5A CN109490763B (en) | 2018-09-18 | 2018-09-18 | Universal testing device and testing method for single board of relay |
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| CN109490763B true CN109490763B (en) | 2021-11-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113433444A (en) * | 2020-03-23 | 2021-09-24 | 北京机械设备研究所 | Circuit board testing and troubleshooting method and system |
| CN111736069B (en) * | 2020-08-07 | 2021-01-26 | 浙江众合科技股份有限公司 | Relay state safety acquisition system for avoiding signal acquisition line mixing |
| CN111781495B (en) * | 2020-09-04 | 2020-11-20 | 江苏金智科技股份有限公司 | Automatic detection platform and method for plug-in of intelligent protection device |
| CN115219888B (en) * | 2021-04-22 | 2023-11-17 | 广州汽车集团股份有限公司 | Relay detection device, control method and control device |
| CN114076867A (en) * | 2021-11-18 | 2022-02-22 | 中车长春轨道客车股份有限公司 | Integrated relay single-vehicle testing process method |
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| JPH102921A (en) * | 1996-06-13 | 1998-01-06 | Mitsubishi Electric Corp | Tester for protective relay |
| US6377051B1 (en) * | 1999-12-03 | 2002-04-23 | Abb Power T&D Company Inc. | Relay test set using computer controlled voltage supply to stimulate both voltage and current transformers |
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