CN214473785U - Relay electrical life test system - Google Patents
Relay electrical life test system Download PDFInfo
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- CN214473785U CN214473785U CN202023233865.2U CN202023233865U CN214473785U CN 214473785 U CN214473785 U CN 214473785U CN 202023233865 U CN202023233865 U CN 202023233865U CN 214473785 U CN214473785 U CN 214473785U
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Abstract
The utility model provides a relay electrical life test system, which comprises a first direct current power supply, a voltage regulator, a microprocessor, a memory, a second direct current power supply, a DC-DC voltage stabilizer, a sampling resistor and a current detection circuit; the microprocessor controls the output of the voltage regulator to make the control voltage output by the voltage regulator be the same as the rated voltage of the relay to be tested; the output end of the voltage regulator is electrically connected to two ends of a coil of the relay to be tested through a switching circuit, and the switching circuit is controlled to be switched on and switched off at a set frequency so as to correspondingly load rated voltage on two ends of the coil; the current detection circuit is used for outputting a first level when a current signal is detected; the memory records the type and rated voltage parameters of the detected relay, and records the on-off times of the switch circuit and the level signal output by the current detection circuit. The utility model discloses an electrical life test system of relay can realize the automatic test of the actual life of different model relays.
Description
Technical Field
The utility model relates to a relay technical field especially relates to an electrical life test system of relay.
Background
The life of a relay is usually referred to as mechanical or electrical life. For the life test, the electrical life of the relay is mainly aimed at, namely, the number of times of repeated on-off load which the relay can bear under the specified normal operating condition and environment. Taking a normally open relay as an example, as a switching device in a circuit, when a coil is loaded with a control voltage within a range meeting requirements, a normally open contact is closed, and one-time connection action on a load circuit is completed. After the control voltage is cut off, the normally open contact is reset, and the load circuit is disconnected.
In the prior art, the electrical service life test of the relay is mainly to perform sampling detection, register and make a book on the sampling detection result, and obtain an average test result through a large number of sampling detections, so that the test result is a test result based on statistics and cannot actually reflect the electrical service life of the relay.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrical life test system of relay can realize automizing and test the electrical life-span of relay to the testing process does not receive the influence of outage.
In order to achieve the above object, a first aspect of the present invention provides a relay electrical life testing system, which includes a first DC power supply, a voltage regulator, a microprocessor, a memory, a second DC power supply, a DC-DC voltage regulator, a sampling resistor, and a current detection circuit;
the output end of the first direct current power supply is electrically connected with the input end of the voltage regulator;
the microprocessor is electrically connected with the voltage regulator and is used for controlling the output of the voltage regulator to ensure that the control voltage output by the voltage regulator is the same as the rated voltage of the relay to be tested;
the output end of the voltage regulator is electrically connected to two ends of a coil of the relay to be tested through a switch circuit, and the switch circuit is connected with the microprocessor and used for controlling the switch circuit to be switched on and off at a set frequency so as to correspondingly load rated voltage on two ends of the coil;
the second direct-current power supply, the DC-DC voltage stabilizer, the sampling resistor and the current detection circuit are sequentially connected in series with the contact of the relay to be tested to form a detection loop; the current detection circuit is connected with the microprocessor and is used for outputting a first level when a current signal is detected;
the microprocessor is connected with the memory, and records the type and rated voltage parameters of the relay, the on-off times of the switch circuit and the level signal output by the current detection circuit through the memory.
Preferably, the relay electrical life test system further comprises an input interface device connected to the microprocessor, wherein the input interface device comprises a touch display for inputting the model and rated voltage of the relay to be tested.
Wherein the microprocessor is configured to control the output of the voltage regulator according to a rated voltage.
Preferably, the touch display is further configured to display the model, the rated voltage, and the test result of the relay to be tested.
Preferably, the first direct current power supply comprises an AC-DC converter connected to a 220VAC power supply end of the commercial power, the AC-DC converter is connected with the voltage regulator, 220VAC is converted into direct current voltage in a preset range through the AC-DC converter, and the direct current voltage is output through the voltage regulator.
Preferably, the first direct current power supply comprises a board-mounted AC-DC converter, the model of the board-mounted AC-DC converter is LD03-20BxxWG, the input voltage is 85-264VAC, and the output voltage is 5-24 VDC.
Preferably, the voltage regulator is an SIP-packaged WRF _ S-1WR2 isolation type voltage regulator, the input voltage of the voltage regulator is 4.5-75 VDC, and the output voltage of the voltage regulator is 5-24 VDC.
The output voltage of the second direct-current power supply is 5V, the model of the DC-DC voltage stabilizer is B05_ LS-1WR3, the input voltage is 4.5-5.5VDC, the output voltage is 3.3-24VDC, the resistance value of the sampling resistor is 10K ohms, the current detection circuit adopts a MAX4372T/F/H current sampling circuit, and two sampling ends of the current detection circuit are connected to two sides of the sampling resistor.
Preferably, the microprocessor is an STM32 series microprocessor, has rich interfaces, supports high performance, real-time function and digital signal processing, has low power consumption, and can realize low-power consumption and low-voltage operation.
Preferably, the first direct current power supply, the voltage regulator, the microprocessor, the memory, the second direct current power supply, the DC-DC voltage regulator, the sampling resistor and the current detection circuit are integrated on a test control circuit board and packaged in a test system housing.
By above the utility model discloses an embodiment, compare with prior art, its beneficial effect who is showing lies in:
1. the utility model discloses an electric life test system of relay can realize the automatic test of the actual life-span of relay, can set for the number of times of testing the break-make by the operator through the interface, and test system tests the relay automatically, and automated operation and automatic recording avoid traditional sampling to detect the result error that brings;
2. the utility model discloses a relay electrical life test system is in the testing process, real-time recording test number of times and result, even appear AC side outage, can continue to detect after resuming the power supply, need not start retesting from the beginning;
3. the isolation voltage regulator is selected on the test power supply, so that high-precision and stable test can be realized, and the adverse effect on the result caused by the fluctuation of the test power supply and the influence on the test effect and precision are avoided;
4. the utility model discloses a relay electrical life test system can test to the relay of different models, only needs to carry out the rated parameter input and the settlement of the relay of corresponding model, and the control test system output corresponding rated voltage can carry out the test procedure, convenient operation and suitability are good;
5. simultaneously, to the life-span test process of every relay, all take notes and carry out the serial number record to the relay for the later stage can carry out the traceability of quality and product.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a functional block diagram of a relay electrical life testing system according to an exemplary embodiment of the present invention.
Fig. 2 is a wiring schematic diagram of a relay electrical life testing system according to an exemplary embodiment of the present invention.
Fig. 3 is a schematic diagram of a current sense circuit in a sense loop according to an exemplary embodiment of the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
The relay electrical life test system of the exemplary embodiment shown in fig. 1 and fig. 2 includes a first DC power supply 10, a voltage regulator 11, a microprocessor 12, a memory 13, a second DC power supply 14, a DC-DC regulator 15, a sampling resistor 16, and a current detection circuit 17.
The output terminal of the first dc power supply 10 is electrically connected to the input terminal of the voltage regulator 11.
The microprocessor 12 is electrically connected with the voltage regulator and is used for controlling the output of the voltage regulator 11 to make the control voltage output by the voltage regulator be the same as the rated voltage of the relay 100 to be tested.
Referring to fig. 1, the output terminal of the voltage regulator 11 is electrically connected to two ends of the coil of the relay to be tested via a switching circuit 18, the switching circuit is connected to the microprocessor 11, and the microprocessor controls the switching circuit to be turned on and off at a set frequency so as to correspondingly load a rated voltage across the coil.
With reference to fig. 1 and 2, a second direct current power supply 14, a DC-DC voltage regulator 15, a sampling resistor 16, and a current detection circuit 17 are connected in series with contacts of a relay to be tested in sequence to form a detection loop; the current detection circuit 17 is connected to the microprocessor 12, and the current detection circuit is configured to output a first level, for example, a high level, when the current signal is detected.
Taking a 24V dc relay as an example, the control voltage output from the regulator 11 is 24VDC and is applied to the coil of the relay 100, thereby controlling the contact operation of the relay. In alternative embodiments, the time for which the control voltage is applied may be set according to actual testing, such as turning on for 5s, turning off for 1s, or setting on and off at other frequencies.
Thus, the control voltage is written to the coil of the relay so that the contacts are closed (for example, when the contacts are closed for 5s, the current is detected by the current detection circuit 17 and the contacts are at a high level, and when the contacts are opened for 1s, the contacts are at a low level, so that a test cycle is obtained, for example, N times at the time of setting the test, N can be selected as needed, for example, 5 ten thousand times, 10 ten thousand times, or the like, and when the low level is continuously detected, the contact operation is considered to fail, and the relay is determined to be defective.
In conjunction with the figure, the microprocessor 12 is connected to the memory 13, and records the type of the relay detected, the rated voltage parameter, and the number of times the switching circuit is turned on and off and the level signal output by the current detection circuit through the memory.
Preferably, the relay electrical life testing system further comprises an input interface device connected to the microprocessor, the input interface device comprising a touch display 20, such as a capacitive touch display, for inputting the model and rated voltage of the relay to be tested. The touch display 20 is further configured to display the model, the rated voltage, and the test result of the relay to be tested.
In an alternative embodiment, the microprocessor is arranged to control the output of the voltage regulator 11 in dependence on the nominal voltage. Therefore, when the relays of different models are tested in batch, the models and the test voltage of the relays (namely the rated voltage of the relays) are input through the touch display 20, and the microprocessor adjusts the output of the voltage regulator according to the input test voltage, so that the automatic batch test of the relays of different models is realized.
In another embodiment, different relay models and corresponding test voltages can be maintained in advance and recorded and stored in a memory of the test system, when different relays are tested, only the model of the tested relay needs to be set, and the microprocessor correspondingly sets the control voltage to output according to the corresponding relation between the relay model and the rated voltage.
With reference to the wiring diagram shown in fig. 2, three sets of contacts, a first set of contacts 1a and 1b, are disposed on the housing of the test system for connecting to an external power source to provide test power access for the test system. For example, a 220VAC AC input is provided.
In a further embodiment, the first DC power source is an AC-DC converted output DC power source, coupled to the first set of contacts 1a and 1 b.
A second set of contacts 2a, 2b for connecting the coil of the relay to be tested. The voltage regulator and the electronic switch are arranged between the first set of contacts and the second set of contacts, so that the loading of the control voltage is controlled.
And the third group of contacts 3a and 3b are used for connecting action contacts of the relay to be tested to form a detection loop.
As shown in fig. 2, the test casing is further provided with the touch display screen and 2 control buttons connected to the microprocessor, that is, a start button for controlling the start of the test and a stop button for controlling the stop of the test.
The first DC power supply 10 includes an AC-DC converter connected to a 220VAC power supply terminal of the commercial power, the AC-DC converter being connected to a voltage regulator, converting 220VAC to a predetermined range of DC voltage by the AC-DC converter, and outputting the DC voltage by the voltage regulator. Preferably, the first direct current power supply comprises a board-mounted AC-DC converter, the board-mounted AC-DC converter is model LD03-20BxxWG, the input voltage is 85-264VAC, and the output voltage is 5-24 VDC.
Preferably, the voltage regulator 11 is an SIP-packaged WRF _ S-1WR2 isolation type voltage regulator, the input voltage of the voltage regulator is 4.5-75 VDC, and the output voltage of the voltage regulator is 5-24 VDC.
The output voltage of the second direct-current power supply is 5V, the model of the DC-DC voltage stabilizer is B05_ LS-1WR3, the input voltage is 4.5-5.5VDC, the output voltage is 3.3-24VDC, the resistance value of the sampling resistor is 10K ohms, the current detection circuit adopts a MAX4372T/F/H current sampling circuit, two sampling ends of the current detection circuit are connected to two sides of the sampling resistor, the input voltage Vcc of the current detection circuit supports a wide voltage range from 2.7V to 24V, and the test voltage Vin is 5VDC of the output voltage of the second direct-current power supply.
Preferably, the first direct current power supply, the voltage regulator, the microprocessor, the memory, the second direct current power supply, the DC-DC voltage regulator, the sampling resistor and the current detection circuit are integrated on a test control circuit board and packaged in a test system housing.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. A relay electrical life test system is characterized by comprising a first direct current power supply, a voltage regulator, a microprocessor, a memory, a second direct current power supply, a DC-DC voltage stabilizer, a sampling resistor and a current detection circuit;
the output end of the first direct current power supply is electrically connected with the input end of the voltage regulator;
the microprocessor is electrically connected with the voltage regulator and is used for controlling the output of the voltage regulator to ensure that the control voltage output by the voltage regulator is the same as the rated voltage of the relay to be tested;
the output end of the voltage regulator is electrically connected to two ends of a coil of the relay to be tested through a switch circuit, and the switch circuit is connected with the microprocessor and used for controlling the switch circuit to be switched on and off at a set frequency so as to correspondingly load rated voltage on two ends of the coil;
the second direct-current power supply, the DC-DC voltage stabilizer, the sampling resistor and the current detection circuit are sequentially connected in series with the contact of the relay to be tested to form a detection loop; the current detection circuit is connected with the microprocessor and is used for outputting a first level when a current signal is detected;
the microprocessor is connected with the memory, and records the type and rated voltage parameters of the relay, the on-off times of the switch circuit and the level signal output by the current detection circuit through the memory.
2. The electrical relay life testing system of claim 1, further comprising an input interface device connected to said microprocessor, said input interface device comprising a touch-sensitive display for inputting the model and rated voltage of the relay to be tested.
3. The relay electrical life testing system of claim 2, wherein the microprocessor is configured to control the output of the voltage regulator according to a rated voltage.
4. The electrical relay life testing system of claim 2, wherein the touch-sensitive display is further configured to display a model number, a rated voltage, and a test result of the relay to be tested.
5. The relay electrical life test system of claim 1, wherein the first DC power source comprises an AC-DC converter connected to a 220VAC power source terminal of the utility power, the AC-DC converter being connected to a voltage regulator, the 220VAC being converted to a predetermined range of DC voltage by the AC-DC converter and output by the voltage regulator.
6. The relay electrical life testing system of claim 5, wherein the first direct current power supply comprises a board-mounted AC-DC converter, model LD03-20BxxWG, an input voltage of 85-264VAC, and an output voltage of 5-24 VDC.
7. The relay electrical life testing system of claim 1, wherein the voltage regulator is an SIP packaged WRF _ S-1WR2 isolated voltage regulator, the input voltage of the voltage regulator is 4.5-75 VDC, and the output voltage of the voltage regulator is 5-24 VDC.
8. The relay electrical life testing system of claim 1, wherein the output voltage of the second direct current power supply is 5V, the DC-DC voltage regulator is B05_ LS-1WR3, the input voltage is 4.5-5.5VDC, the output voltage is 3.3-24VDC, the resistance value of the sampling resistor is 10K ohms, and the current detection circuit employs a MAX4372T/F/H current sampling circuit, two sampling ends of which are connected to two sides of the sampling resistor.
9. The relay electrical life testing system of claim 1, wherein the microprocessor is an STM32 family microprocessor.
10. The electrical relay life testing system of claim 1, wherein the first DC power supply, the voltage regulator, the microprocessor, the memory, the second DC power supply, the DC-DC voltage regulator, the sampling resistor, and the current detection circuit are integrated on a test control circuit board and enclosed within a test system housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023233865.2U CN214473785U (en) | 2020-12-28 | 2020-12-28 | Relay electrical life test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023233865.2U CN214473785U (en) | 2020-12-28 | 2020-12-28 | Relay electrical life test system |
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| Publication Number | Publication Date |
|---|---|
| CN214473785U true CN214473785U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023233865.2U Active CN214473785U (en) | 2020-12-28 | 2020-12-28 | Relay electrical life test system |
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| CN (1) | CN214473785U (en) |
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