CN114355177B - Relay mechanical life test method and system - Google Patents

Relay mechanical life test method and system Download PDF

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CN114355177B
CN114355177B CN202111325914.1A CN202111325914A CN114355177B CN 114355177 B CN114355177 B CN 114355177B CN 202111325914 A CN202111325914 A CN 202111325914A CN 114355177 B CN114355177 B CN 114355177B
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test
relay
signal
time
test signal
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CN114355177A (en
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方卫
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Guangzhou Chenchuang Technology Development Co ltd
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Abstract

The application discloses a method and a system for testing the mechanical life of a relay, which relate to the testing technology, and the method comprises the following steps: pre-testing for a preset number of times according to the first test signal, wherein the preset number of times is less than 5% of the total number of times; estimating a maintenance time required by the second test signal according to the statistic values of the response time of the plurality of pre-test relays; and performing the rest test on the relay according to a second test signal, wherein the first test signal maintaining time is longer than the second test signal maintaining time. The application can shorten the test time and improve the test efficiency.

Description

Relay mechanical life test method and system
Technical Field
The application relates to a testing technology, in particular to a method and a system for testing the mechanical life of a relay.
Background
There are a number of life tests of relays, of which the life of the mechanical part is of importance. The existing test method is to apply a voltage signal to the control end of the relay, then disconnect the relay, and repeat the test process until a certain number of tests or relay damage is satisfied.
In general, the holding time of the test signal varies by tens of milliseconds due to the difference of the relays, so that a large redundancy is reserved for the test signal. Although the period of each test is very short, the test often needs to be repeated tens of thousands or even hundreds of thousands of times.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a method and a system for testing the mechanical life of a relay so as to compress the test time.
In one aspect, the embodiment of the application provides a method for testing the mechanical life of a relay, which comprises the following steps:
pre-testing for a preset number of times according to the first test signal, wherein the preset number of times is less than 5% of the total number of times;
estimating a maintenance time required by the second test signal according to the statistic values of the response time of the plurality of pre-test relays;
and performing the rest test on the relay according to a second test signal, wherein the first test signal maintaining time is longer than the second test signal maintaining time.
In some embodiments, the estimating the maintenance time required for the second test signal according to the statistics of the response time of the plurality of pre-test relays is specifically:
determining the minimum maintenance time according to the sum of the average value of the response time and the preset maintenance time;
multiplying the minimum sustain time by an empirical factor greater than 1 to obtain a sustain time of the second test signal.
In some embodiments, the remaining test of the relay according to the second test signal is specifically:
and testing the relay according to the second test signal until the test times are met, or the relay cannot act.
In some embodiments, the control signal output by the test device to the relay is a square wave formed by the second test signal and a third signal at intervals, wherein the third signal is of opposite level to the second test signal.
In some embodiments, the method further comprises the steps of: when no signal replacement of the controlled end of the relay is detected, the test times when the fault occurs are recorded, the relay is judged to be invalid, and the rest tests are stopped.
In some embodiments, the method further comprises the steps of: when no signal replacement is detected at the controlled end of the relay, the test times when faults occur are recorded, the test is continued, and the times of no signal replacement are recorded.
In some embodiments, the method further comprises the steps of:
a test report is generated that includes a maximum response time, a minimum response time, an average response time, and a switch average lifetime for each sample.
In another aspect, an embodiment of the present application provides a relay mechanical life test system, including:
the relay installation seat is used for installing a relay;
and the controller is connected with the relay mounting seat and is used for outputting a test signal to the relay through the relay mounting seat, detecting a response signal of a controlled end of the relay through the relay mounting seat and executing a mechanical life test method of the relay.
In another aspect, an embodiment of the present application provides a relay mechanical life test system, including:
a memory for storing a program;
and the processor is used for loading the program to execute the relay mechanical life testing method.
In another aspect, an embodiment of the present application provides a relay mechanical life test system, including:
the pre-test module is used for carrying out pre-test for preset times according to the first test signal, and the preset times are less than 5% of the total test times;
the estimating module is used for estimating the maintenance time required by the second test signal according to the statistic value of the response time of the plurality of pre-test relays;
and the test module is used for carrying out residual test on the relay according to a second test signal, wherein the first test signal maintaining time is longer than the second test signal maintaining time.
The embodiment of the application determines the response time of the relay through a relatively small number of tests, and then estimates the time required to be maintained for the second test based on the response time, and tests the relay according to the response time, so that under the condition that the relay responds faster, tens of milliseconds can be saved for each test, and minutes can be saved for tens of thousands of tests.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of testing mechanical life of a relay;
fig. 2 is a block diagram of a relay mechanical life test system.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described by means of implementation examples with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application in combination with the specific contents of the technical scheme.
In the description of the present application, a description of the terms "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., means that a particular feature or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, the embodiment discloses a method for testing the mechanical life of a relay, which comprises the following steps:
step one, pre-testing for preset times according to a first test signal, wherein the preset times are less than 5% of the total test times. Typically, about five hundred tests have met the sampling requirements. Thus, ten thousand tests correspond to just about 5% of the number of tests. The service life of the relay switch times is generally more than 10 ten thousand times, and even 100 ten thousand times can be achieved. In a huge number of tests, even millisecond-level time savings can be achieved.
And secondly, estimating the maintenance time required by the second test signal according to the statistic values of the response time of the plurality of pre-test relays. In this embodiment, the response time of the relay may vary from relay to relay. Thus, the test signal need only take into account the time required for the relay to respond (here, the time to apply the signal to the relay action) and the time required for maintenance (here, maintenance refers to maintaining the controlled end connected or/disconnected). The test required hold time and the relay response time are typically added together and then multiplied by an empirical factor, which tends to be a greater value than 1, for example 1.1 or 1.2, with more 0.1 or 0.2 being the redundant part.
And thirdly, performing residual testing on the relay according to a second test signal, wherein the first test signal maintaining time is longer than the second test signal maintaining time.
Then, after estimating the time required for the maintenance of the second test signal, a responsive test waveform is generated, and then the remaining signals are performed according to the test waveform.
For example, in one step, a square wave with a duty cycle of 50% may be tested, where the high level in the square wave is the first test signal, and assuming that the holding time of the first test signal is 200ms, the time for the controlled terminal to maintain connection when the test is required is 100ms, and the time for the relay to actually respond is 20ms, this means that only 120ms of test signal is actually required to meet the test condition, but in order to avoid deviation when the relay is tested, a margin of about 20% may be set, so that the second test signal is determined to be 144ms. The above test standard and test result are for illustrating the technical effects of the present application, and do not have any limitation on the actual test time.
The embodiment of the application determines the response time of the relay through a relatively small number of tests, and then estimates the time required to be maintained for the second test based on the response time, and tests the relay according to the response time, so that under the condition that the relay responds faster, tens of milliseconds can be saved for each test, and minutes can be saved for tens of thousands of tests.
In some embodiments, the estimating the maintenance time required for the second test signal according to the statistics of the response time of the plurality of pre-test relays is specifically:
determining the minimum maintenance time according to the sum of the average value of the response time and the preset maintenance time;
multiplying the minimum sustain time by an empirical factor greater than 1 to obtain a sustain time of the second test signal.
In this embodiment, the preset maintenance time is the maintenance time of the controlled end of the test request relay, and the minimum maintenance time is the sum of the average value of the response time and the preset maintenance time, and a coefficient is multiplied on the basis of the sum, so that the maintenance time of the second test signal can be obtained.
In some embodiments, the remaining test of the relay according to the second test signal is specifically:
and testing the relay according to the second test signal until the test times are met, or the relay cannot act. In this embodiment, a limited number of test modes may be adopted during the test, with the objective of testing whether the relay satisfies the life condition, and a limit test mode may also be adopted during the test, with the objective of testing the maximum life of the relay.
In some embodiments, the control signal output by the test device to the relay is a square wave formed by the second test signal and a third signal at intervals, wherein the third signal is of opposite level to the second test signal. In this embodiment, the second test signals are standard square waves, and each of the second test signals is a high level corresponding to the square wave. The third signal in this embodiment is low.
In some embodiments, the method further comprises the steps of: when no signal replacement of the controlled end of the relay is detected, the test times when the fault occurs are recorded, the relay is judged to be invalid, and the rest tests are stopped. In this embodiment, after a faulty relay, the test may be stopped directly, specifically, the power supply to the relay may be turned off directly.
In some embodiments, the method further comprises the steps of: when no signal replacement is detected at the controlled end of the relay, the test times when faults occur are recorded, the test is continued, and the times of no signal replacement are recorded. In this embodiment, only a record is made when an individual fault occurs, and then the test is continued, and whether the relay belongs to an occasional fault or permanently fails is determined by the remaining test.
In some embodiments, the method further comprises the steps of:
a test report is generated that includes a maximum response time, a minimum response time, an average response time, and a switch average lifetime for each sample. In this embodiment, the system generates a test report based on the results of the test, and it is to be understood that in the present application, the second test signal provided for each relay is independent. It means that even if different relay types are loaded in the test system at the same time, the test can be successfully completed only by setting the initialized test conditions respectively.
Referring to fig. 2, an embodiment of the present application provides a relay mechanical life test system, including:
the relay installation seat is used for installing a relay;
and the controller is connected with the relay mounting seat and is used for outputting a test signal to the relay through the relay mounting seat, detecting a response signal of a controlled end of the relay through the relay mounting seat and executing a mechanical life test method of the relay.
In another aspect, an embodiment of the present application provides a relay mechanical life test system, including:
a memory for storing a program;
and the processor is used for loading the program to execute the relay mechanical life testing method.
In another aspect, an embodiment of the present application provides a relay mechanical life test system, including:
the pre-test module is used for carrying out pre-test for preset times according to the first test signal, and the preset times are less than 5% of the total test times;
the estimating module is used for estimating the maintenance time required by the second test signal according to the statistic value of the response time of the plurality of pre-test relays;
and the test module is used for carrying out residual test on the relay according to a second test signal, wherein the first test signal maintaining time is longer than the second test signal maintaining time.
The embodiment of the application determines the response time of the relay through a relatively small number of tests, and then estimates the time required to be maintained for the second test based on the response time, and tests the relay according to the response time, so that under the condition that the relay responds faster, tens of milliseconds can be saved for each test, and minutes can be saved for tens of thousands of tests.
The integrated units in the present application may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as stand alone products. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only memory (ROM), a random access memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, etc., which can store program codes.
Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the application, which is set forth in the following claims.

Claims (8)

1. The method for testing the mechanical life of the relay is characterized by comprising the following steps of:
pre-testing for a preset number of times according to the first test signal, wherein the preset number of times is less than 5% of the total number of times;
according to the statistical value of the response time of the plurality of pre-test relays, the maintenance time required by the second test signal is estimated, specifically:
determining the minimum maintenance time according to the sum of the average value of the response time and the preset maintenance time; multiplying the minimum maintenance time by an empirical coefficient greater than 1 to obtain maintenance time of a second test signal;
the response time is the time of applying a signal to the relay action; the preset maintaining time is the time for maintaining the connection or disconnection of the controlled end of the relay;
and carrying out residual test on the relay according to the second test signal, wherein the residual test is specifically as follows:
and testing the relay according to the second test signal until the test times are met or the relay cannot act, wherein the maintenance time of the first test signal is longer than that of the second test signal.
2. The method of claim 1, wherein the control signal output by the test device to the relay is a square wave of a second test signal and a third signal, wherein the third signal is at an opposite level to the second test signal.
3. The method for testing mechanical life of a relay according to claim 1, further comprising the steps of: when no signal replacement of the controlled end of the relay is detected, the test times when the fault occurs are recorded, the relay is judged to be invalid, and the rest tests are stopped.
4. The method for testing mechanical life of a relay according to claim 1, further comprising the steps of:
when no signal replacement is detected at the controlled end of the relay, the test times when faults occur are recorded, the test is continued, and the times of no signal replacement are recorded.
5. The method for testing mechanical life of a relay according to claim 1, further comprising the steps of:
a test report is generated that includes a maximum response time, a minimum response time, an average response time, and a switch average lifetime for each sample.
6. A relay mechanical life test system, comprising:
the relay installation seat is used for installing a relay;
a controller connected to the relay mount for outputting a test signal to the relay via the relay mount and detecting a response signal from the relay mount to the relay controlled end, and performing the method of any of claims 1-5.
7. A relay mechanical life test system, comprising:
a memory for storing a program;
a processor for loading the program to perform the method of any one of claims 1-5.
8. A relay mechanical life test system, comprising:
the pre-test module is used for carrying out pre-test for preset times according to the first test signal, and the preset times are less than 5% of the total test times;
the estimating module is configured to estimate a maintenance time required for the second test signal according to statistics of response times of the plurality of pre-test relays, and specifically includes:
determining the minimum maintenance time according to the sum of the average value of the response time and the preset maintenance time; multiplying the minimum maintenance time by an empirical coefficient greater than 1 to obtain maintenance time of a second test signal;
the response time is the time of applying a signal to the relay action; the preset maintaining time is the time for maintaining the connection or disconnection of the controlled end of the relay;
the test module is used for carrying out residual test on the relay according to the second test signal, and specifically comprises the following steps: and testing the relay according to the second test signal until the test times are met or the relay cannot act, wherein the maintenance time of the first test signal is longer than the signal maintenance time of the second test.
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