CN110806538A - Relay checking system and testing method thereof - Google Patents
Relay checking system and testing method thereof Download PDFInfo
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- CN110806538A CN110806538A CN201911168216.8A CN201911168216A CN110806538A CN 110806538 A CN110806538 A CN 110806538A CN 201911168216 A CN201911168216 A CN 201911168216A CN 110806538 A CN110806538 A CN 110806538A
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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 relay checking system and a testing method thereof, wherein the relay checking system comprises a power supply module, a three-terminal voltage regulator, a single chip microcomputer, an A/D converter, a digital voltage regulator, a current/voltage measuring module, a port module and an HMI (human machine interface); the power supply module is used for externally connecting 220V alternating current and providing power for the relay checking system; the three-terminal voltage stabilizing device is arranged between the power supply module and the port module; the single chip microcomputer is communicated with the voltage/current measuring module, the HMI human-computer interaction interface and the power supply module in a serial communication mode; the A/D converter is arranged between the voltage/current measuring module and the singlechip. The embodiment of the invention realizes automatic and rapid measurement of multiple relay parameters, and is convenient and rapid.
Description
Technical Field
The invention relates to the technical field of electrical verification, in particular to a relay verification system and a test method thereof.
Background
In the process of closing and breaking the contacts of the relay, various phenomena such as metal liquid bridge, electric arc, spark discharge and the like are generated due to the thermal and electric physical process between the contacts, so that the electric abrasion of the contact material is caused, and the reliability of the relay is influenced. Therefore, it is very necessary to test the relay.
Through the test of the relay, not only can obtain some important technical indexes about the relay reliability of the relay, still be favorable to analyzing the main reason that the relay failed, provide important basis for using and improving product design. The research of relay testing technology has become an important work of manufacturers and research departments, and the research work mainly comprises a relay testing method, a relay testing standard and a relay testing device.
Disclosure of Invention
Aiming at the requirement of testing an electromagnetic relay, the invention provides a relay checking system and a testing method thereof, which realize high-precision and automatic testing of relay parameters.
The invention is realized by the following technical scheme:
a relay checking system is characterized in that: the system comprises a power supply module, a three-terminal voltage regulator, a single chip microcomputer, an A/D converter, a digital voltage regulator, a current/voltage measuring module, a port module and an HMI (human machine interface) man-machine interaction interface;
the power supply module is used for externally connecting 220V alternating current and providing power for the relay checking system;
the three-terminal voltage stabilizing device is arranged between the power supply module and the port module;
the single chip microcomputer is communicated with the voltage/current measuring module, the HMI human-computer interaction interface and the power supply module in a serial communication mode;
the A/D converter is arranged between the voltage/current measuring module and the singlechip;
the digital voltage regulator is arranged between the port module and the voltage/current measuring module;
the port module is formed by connecting a socket and a test wire interface.
The HMI human-computer interaction interface comprises a relay model selection interface, a historical data interface and an automatic test interface; the relay model selection interface is provided with two pull-down menus, one of which selects the relay model and the other selects test items, wherein the test items comprise coil current, coil voltage, contact resistance, an action value, a release value and time parameters; the historical data interface contains all automatically tested data parameters.
The current/voltage measuring module uses a three-terminal voltage stabilizer to form a voltage division loop to convert +220V strong voltage into +5V weak voltage, and the port module and the 36 omega resistor are connected in series to divide voltage and acquire action current.
The port module comprises a direct current output terminal interface and a feedback contact input terminal interface; the direct current output terminal interfaces are a pressure port A1 and a pressure port B2 respectively; the feedback contact input terminal interfaces are a relay action input port A3 and an input port B4 respectively.
The invention also provides a test method based on the relay checking system, which comprises the following steps:
s1: correspondingly connecting the positive and negative poles of the coil of the relay to be tested to the positive and negative terminals of the direct current output terminal interface, and connecting a group of normally open contacts of the relay to be tested to the interface of the feedback contact input terminal;
s2: and selecting a relay model selection interface on the HMI man-machine interaction interface, selecting a test item after selecting the relay model, pressing a 'start/stop' button for testing, and displaying the obtained test data on the HMI man-machine interaction interface.
When the automatic test interface is selected to test the relay, the 'start/stop' button is directly pressed to test without selecting the model and the test item of the relay, and the voltage and current parameters of the relay are tested later.
After the relay model is selected in step S2, corresponding relay parameters built in the database may be obtained, including: vout amplitude, change speed, voltage setting value, error requirement, action voltage, action current, return voltage, return current and action time.
1. The invention can automatically and rapidly measure the parameters of the direct current relay, intuitively reflects the parameters to a human-computer interaction interface, and is convenient and rapid.
2. The invention can test parameters of coil current, contact resistance of the contact, action value and release value, contact action time, contact return time, contact bounce time, stable action time, stable return time and the like of the relay, has wide functions and has good application value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a relay checking system in an embodiment of the invention;
fig. 2 is a schematic circuit diagram of a relay verification system in an embodiment of the invention.
Detailed Description
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. 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.
Fig. 1 shows a schematic structural diagram of a relay calibration system in an embodiment of the present invention, which includes a power supply module, a three-terminal regulator, a single chip microcomputer, an a/D converter, a digital voltage regulator, a current/voltage measurement module, a port module, an HMI human-machine interface, and the like.
The power module is externally connected with 220V alternating current and provides power for the single chip microcomputer, the display module and the relay to be tested.
The three-terminal voltage stabilizing device is arranged between the power supply module and the port module; the three-terminal voltage stabilizer selects LM7805CK, converts external 220V alternating current into 5V direct current for a relay to be tested connected to the port module; specifically, a three-terminal voltage regulator is used in a current/voltage measuring module to form a voltage division loop, strong voltage of +220V is converted into weak voltage of +5V, and a port module and a 36 omega resistor are connected in series to divide voltage and acquire action current.
The single chip microcomputer is communicated with the voltage/current measuring module, the HMI human-machine interaction interface and the power supply module in a serial communication mode; the single chip microcomputer has the functions of storing programs, monitoring input, internal calculation, outputting control instructions and the like.
The A/D converter is arranged between the voltage/current measuring module and the singlechip and is used for converting the electric signals collected by the voltage/current measuring module into digital signals and transmitting the digital signals to the singlechip for processing and comparison.
The digital voltage regulator is arranged between the port module and the voltage/current measuring module; because the normally closed and normally open contact resistance of the relay is very small, the voltage drop on the contact is very small, and the voltage of the relay needs to be amplified through a digital voltage regulator.
The port module is formed by connecting a socket and a test wire interface.
The working principle of the invention is as follows:
after the positive and negative poles of the coil of the relay to be tested and the normally open contact are connected to the port module, the system generates a constant current source through the contact of the relay to be tested through a three-terminal regulator, small voltage drop is generated on the contact, the constant current source sampling resistor is respectively connected to the differential sampling ends ADC0, ADC1, ADC2 and ADC3, the single chip microcomputer receives the indirect action voltage, the indirect action current and the relay contact action condition which are obtained by amplifying the voltage drop through a digital voltage regulator and converting an electric signal into a digital signal through an A/D converter, the starting power, the starting voltage, the return voltage, the rated power and the action time of the relay can be obtained through data processing according to the values, a check conclusion is given according to the back measure values, and the check conclusion is sent to an HMI (.
As a further improvement of the invention, the current/voltage measuring module uses a three-terminal voltage stabilizer to form a voltage division loop to convert a +220V strong voltage into a +5V weak voltage, and the port module and a 36 omega resistor are connected in series to divide voltage and acquire action current.
A voltage division loop is formed by using a three-terminal voltage stabilizer to convert strong +220V voltage into weak +5V voltage for the differential sampling ends ADC0 and ADC1 to collect, and indirect action voltage is measured; the relay to be verified and the 36 omega resistor series voltage division circuit connected with the port module are collected through the differential sampling ends ADC2 and ADC3, and indirect action current is measured.
The port module comprises a direct current output terminal interface and a feedback contact input terminal interface; the direct current output terminal interfaces are respectively a pressure port A1 and a pressure port B2; the feedback contact input terminal interfaces are a relay action input port A3 and an input port B4 respectively; specifically, fig. 2 is a schematic circuit diagram of a relay checking system.
The direct current output terminal interface can measure parameters such as voltage, current and the like of a relay coil; the feedback joint input terminal interface can measure various parameters of the relay contact state, such as: contact actuation time, contact return time, contact bounce time, steady actuation time, steady return time, and the like.
The HMI human-computer interaction interface comprises a relay model selection interface, a historical data interface and an automatic test interface; the relay model selection interface is provided with two pull-down menus, one of which selects the relay model and the other selects test items, wherein the test items comprise coil current, coil voltage, contact resistance, an action value, a release value and time parameters; the historical data interface contains all automatically tested data parameters.
The test method of the relay checking system comprises the following steps:
s1: correspondingly connecting the positive and negative poles of the coil of the relay to be tested to the positive and negative terminals of the direct current output terminal interface, and connecting a group of normally open contacts of the relay to be tested to the interface of the feedback contact input terminal;
s2: selecting a relay model selection interface on an HMI (human machine interface) man-machine interaction interface, and obtaining corresponding relay parameters built in a database after selecting the relay model, wherein the relay model selection interface comprises the following steps: vout amplitude, change speed, voltage setting value, error requirement, action voltage, action current, return voltage, return current and action time; and then selecting a test item, finally pressing a 'start/stop' button for testing, and displaying the obtained data on the HMI man-machine interaction interface.
When the automatic test interface is selected to perform the relay test in step S1, the "start/stop" button is directly pressed to perform the test without selecting the relay model and the test item, and the voltage and current parameters of the relay are then tested.
After the relay model is selected in step S2, corresponding relay parameters built in the database may be obtained, including: vout amplitude, change speed, voltage setting value, error requirement, action voltage, action current, return voltage, return current and action time.
The working principle of the embodiment is as follows:
after the positive and negative poles of the coil of the relay to be tested and the normally open contact are connected to the port module, the system generates a constant current source through the contact of the relay to be tested through a three-terminal regulator, small voltage drop is generated on the contact, the constant current source sampling resistor is respectively connected to the differential sampling ends ADC0, ADC1, ADC2 and ADC3, the single chip microcomputer receives the indirect action voltage, the indirect action current and the relay contact action condition which are obtained by amplifying the voltage drop through a digital voltage regulator and converting an electric signal into a digital signal through an A/D converter, the starting power, the starting voltage, the return voltage, the rated power and the action time of the relay can be obtained through data processing according to the values, a check conclusion is given according to the back measure values, and the check conclusion is sent to an HMI (.
In addition, the above detailed description is given to the relay verification system and the test method thereof provided by the embodiment of the present invention, and a specific example should be adopted herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A relay checking system is characterized in that: the system comprises a power supply module, a three-terminal voltage regulator, a single chip microcomputer, an A/D converter, a digital voltage regulator, a current/voltage measuring module, a port module and an HMI (human machine interface) man-machine interaction interface;
the power supply module is used for externally connecting 220V alternating current and providing power for the relay checking system;
the three-terminal voltage stabilizing device is arranged between the power supply module and the port module;
the single chip microcomputer is communicated with the voltage/current measuring module, the HMI human-computer interaction interface and the power supply module in a serial communication mode;
the A/D converter is arranged between the voltage/current measuring module and the singlechip;
the digital voltage regulator is arranged between the port module and the voltage/current measuring module;
the port module is formed by connecting a socket and a test wire interface.
2. The relay verification system of claim 1, wherein: the HMI human-computer interaction interface comprises a relay model selection interface, a historical data interface and an automatic test interface; the relay model selection interface is provided with two pull-down menus, one of which selects the relay model and the other selects test items, wherein the test items comprise coil current, coil voltage, contact resistance, an action value, a release value and time parameters; the historical data interface contains all automatically tested data parameters.
3. The relay verification system according to claim 1 or 2, wherein: the current/voltage measuring module uses a three-terminal voltage stabilizer to form a voltage division loop to convert +220V strong voltage into +5V weak voltage, and the port module and the 36 omega resistor are connected in series to divide voltage and acquire action current.
4. The relay verification system of claim 3, wherein: the port module comprises a direct current output terminal interface and a feedback contact input terminal interface; the direct current output terminal interfaces are a pressure port A1 and a pressure port B2 respectively; the feedback contact input terminal interfaces are a relay action input port A3 and an input port B4 respectively.
5. A test method based on the relay verification system of any one of claims 1 to 4, characterized in that: the method comprises the following steps:
s1: correspondingly connecting the positive and negative poles of the coil of the relay to be tested to the positive and negative terminals of the direct current output terminal interface, and connecting a group of normally open contacts of the relay to be tested to the interface of the feedback contact input terminal;
s2: and selecting a relay model selection interface on the HMI man-machine interaction interface, selecting a test item after selecting the relay model, pressing a 'start/stop' button for testing, and displaying the obtained test data on the HMI man-machine interaction interface.
6. The method for testing a relay verification system according to claim 5, wherein: when the automatic test interface is selected to test the relay, the 'start/stop' button is directly pressed to test without selecting the model and the test item of the relay, and the voltage and current parameters of the relay are tested later.
7. The method for testing a relay verification system according to claim 5, wherein: after the relay model is selected in step S2, corresponding relay parameters built in the database may be obtained, including: vout amplitude, change speed, voltage setting value, error requirement, action voltage, action current, return voltage, return current and action time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911168216.8A CN110806538A (en) | 2019-11-25 | 2019-11-25 | Relay checking system and testing method thereof |
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| CN201911168216.8A CN110806538A (en) | 2019-11-25 | 2019-11-25 | Relay checking system and testing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929573A (en) * | 2020-07-27 | 2020-11-13 | 中核核电运行管理有限公司 | Thermal relay automatic check meter in constant temperature environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929573A (en) * | 2020-07-27 | 2020-11-13 | 中核核电运行管理有限公司 | Thermal relay automatic check meter in constant temperature environment |
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