CN103293470A - Circuit for testing service life of switches - Google Patents
Circuit for testing service life of switches Download PDFInfo
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- CN103293470A CN103293470A CN2012100461367A CN201210046136A CN103293470A CN 103293470 A CN103293470 A CN 103293470A CN 2012100461367 A CN2012100461367 A CN 2012100461367A CN 201210046136 A CN201210046136 A CN 201210046136A CN 103293470 A CN103293470 A CN 103293470A
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Abstract
The invention discloses a circuit for testing the service life of switches. According to the circuit for testing the service life of the switches, a power supply, a current-limiting resistor and the switches to be tested are connected into a current loop in series. The input end of a light display unit is connected to one output end of the power supply, the output end of the light display unit is connected to one input end of a time relay in series, and the other input end of the time relay is connected to the other output end of the power supply through the current-limiting resistor. After an audible alarming unit is connected with the output end of the time relay in series, the audible alarming unit is connected to two output ends of the switches to be tested in parallel, wherein the switches to be tested are connected in series. In the testing process of repeating switch-on and switch-off of the switches to be tested, when any one of the switches to be tested is switched off abnormally, a fault indicating lamp of the light display unit is on continuously, the output end of the time relay is conductive, the audible alarming unit is energized and gives an alarm, and a corresponding identification display lamp flickers or is off continuously. The accuracy of test data, obtained by the circuit, of the service life of the switches is high and work intensity of an experimenter is relieved.
Description
Technical field
The present invention relates to the on-off element technical field, relate in particular to the durability test of switch.
Background technology
The effect of switch is exactly opening and closing, and it can make open circuit, makes current interruptions or make its electronic component that flows to other circuit as a kind of, is widely used the opening and closing light fixture in light fixture.
The number of operations life-span of switch is the important indicator of weighing its quality.Carried out switching manipulation number of times durability test in the past, after the experimenter needs halfway different phase switch number of times in process of the test, stop to check whether switch is normal, cause the corresponding increasing of experimenter's workload, and the accuracy of test figure is difficult to be guaranteed.
Summary of the invention
Technical matters to be solved by this invention is the deficiency that exists at above-mentioned prior art, a kind of audible alarm circuit of switch life test is provided, it is unusual that thereby the caution measured switch occurs, and experimenter and then observation display lamp are confirmed to be the unusual of certain measured switch.
The present invention addresses the above problem the technical scheme that proposes to be: a kind of test circuit for switch life comprises: power supply, light show unit, the time relay, audible alarm unit and current-limiting resistance.
Described power supply, current-limiting resistance and measured switch are formed current return; The input end that described light shows unit and the time relay is connected in series, and the apparent unit of the light after being connected in series and time relay place branch road are connected in the two ends of measured switch again in parallel; One output terminal of the described time relay is in series with an end of audible alarm unit and is connected, and the back that is connected in series is connected in the measured switch two ends in parallel by another output terminal of the time relay and the other end of audible alarm unit.
Described test circuit for switch life, wherein, described power supply is direct supply.The quantity of described measured switch is one.The quantity that described light shows the unit is one.
Described test circuit for switch life, wherein, the quantity of described measured switch is more than two, and measured switch is connected in series mutually.It is consistent with the quantity of measured switch that described light shows the quantity of unit, and the end that light shows the unit is connected with an end of measured switch, and the other end of the apparent unit of light is connected with an input end of the time relay.
Described test circuit for switch life, wherein, it is LED that described light shows the unit, and the negative pole of LED links to each other with an input end of the time relay, the positive pole of LED links to each other with the power input of measured switch.Described audible alarm unit comprises hummer.Described hummer is the low pressure hummer.
Compared with prior art, adopt the advantage of the technical scheme of audible alarm of the present invention to be: the accuracy that 1, obtains the switch life test figure; 2, reduced the problem of experimenter's working strength; 3, simple in structure, the reliable operation of hookup.
Description of drawings
Fig. 1 is the electrical schematic diagram that the present invention is used for the test circuit embodiment of switch life.
Among the figure, S1, S2, S3 are respectively first, second, third measured switch, and R is current-limiting resistance, and BT1 is battery, and D1, D2, D3 are respectively first, second, third light emitting diode, and TL is the time relay of on-delay, and U1 is the low pressure hummer.
Embodiment
In order to make those skilled in the art person understand technical scheme of the present invention better, be described in further detail below in conjunction with drawings and Examples.
The present invention is used for the basic comprising of the test circuit of switch life, comprises that measured switch, power supply, light show unit, the time relay, audible alarm unit and current-limiting resistance.
Wherein, power supply, current-limiting resistance and some measured switch are composed in series current return; The input end of the apparent unit of light is connected an output terminal of power supply, and the output terminal of the apparent unit of light is serially connected in an input end of the time relay, and another input end of the time relay is connected another output terminal of power supply through current-limiting resistance; Audible alarm unit and two output terminals that are attempted by the measured switch of series connection after the output terminal of the time relay is connected.
The present invention be used for switch life test circuit an embodiment as shown in Figure 1.
In the present embodiment, the functional structure of hookup is: as the measured switch of durability test, it is normal open switch that present embodiment is selected three measured switch S1, S2, S3 for use.Certainly, the object of durability test also can be normally closed switch.Power supply is the direct supply that the negative pole of battery BT1 is serially connected with current-limiting resistance R, is connected across first, second, third measured switch S1 of series connection, the two ends of S2, S3.The effect of current-limiting resistance R is when bypass takes place, and can reduce by-pass current.The time relay is the time relay TL of on-delay, can select air damping type, power type or electron type for use, and its output terminal is for often opening the time-delay conducting.The audible alarm unit is low pressure hummer U1, and the output terminal of often opening the time-delay conducting of itself and time relay TL has been composed in series warning circuit.
It is light emitting diode D1, D2, the D3 of LED assembly that light shows the unit, and the negative pole of the light emitting diode of this LED assembly also is linked together an input end that is concatenated into time relay TL as output terminal; Wherein the just very input end of the 3rd light emitting diode D3 is connected to measured switch S3 and the anodal end points that is connected of battery BT1, and this light emitting diode uses as malfunction indicator lamp; As the identification end, wherein the positive pole of the first light emitting diode D1 is connected to the series connection node of measured switch S1, S2 to the positive pole of first, second light emitting diode D1, D2 respectively, and the positive pole of the second light emitting diode D2 is connected to the series connection node of measured switch S2, S3; First, second light emitting diode D1, D2 use as corresponding identification pilot lamp respectively.Another input end of time relay TL is connected to another end points of measured switch S1.
In the present embodiment, the principle of work of hookup is as follows.
Measured switch is in normal condition: the button frock of test unit, when pressing first, second, third measured switch S1, S2, S3 at the same time, measured switch is all closed, electric current is from first, second, third measured switch S1, S2, the S3 of positive pole by connecting of battery BT1, through the other end of current-limiting resistance R, get back to the negative pole of battery BT1.Being equivalent to originally can be through the electric current of LED assembly by first, second, third measured switch S1, S2, S3 bypass, and light shows the unit does not have electric current to pass through, so first, second, third light emitting diode D1, D2, D3 all do not work.
When unclamping first, second, third measured switch S1, S2, S3 at the same time, measured switch all disconnects, electric current from the positive pole of battery BT1 can only be successively through i.e. i.e. another input end other end of current-limiting resistance R just of an input end, the time relay TL of negative pole, the time relay TL of the 3rd light emitting diode D3 of output terminal of positive pole, the LED assembly of the 3rd light emitting diode D3 of the input end of LED assembly, get back to the negative pole of battery BT1.Light shows the unit has electric current to pass through, and the 3rd light emitting diode D3 of LED assembly lights.
This state shows that the open and close function of measured switch is normal.Because of the delay time of the time relay TL that sets on-delay, greater than unclamping the time of button frock, so the output terminal of time relay TL can be closed, hummer U1 does not have electric current to flow through, and can not report to the police.
Measured switch is in abnormality: measured switch is in the process of the test of open and close repeatedly, when any one measured switch disconnected unusually, bypass all can not take place in electric current, and light shows the malfunction indicator lamp Chang Liang of unit, the output terminal time-delay conducting of the time relay, the audible alarm unit gets electric alarm.
If the first measured switch S1 disconnects unusually, first, second light emitting diode D1, D2 flicker accordingly, the 3rd light emitting diode D3 Chang Liang; If the second measured switch S2 disconnects unusually, corresponding second light emitting diode D2 flicker, the 3rd light emitting diode D3 Chang Liang, the first optical diode D1 extinguishes; If the 3rd measured switch S3 disconnects unusually, the 3rd light emitting diode D3 Chang Liang, first, second light emitting diode D1, D2 extinguish accordingly.
This kind state, the output terminal time-delay conducting of often opening the time-delay conducting of time relay TL, hummer U1 gets electric the warning, the number of operations value of the measured switch of caution experimenter recording exceptional state.
In the present embodiment, the test procedure of hookup is as follows.
1, at first each contact of measured switch is connected on the respective terminal of hookup.
2, then measured switch is fixed on the button frock of test unit.
3, according to the test demand pressing of button frock is set and unclamps the time, and corresponding test number (TN).
4, the delay time of the time relay TL of hookup is set again, and this delay time needs greater than the unclamping the time of button frock, avoids buzzer warning during the unclamping of button frock.
5, connect with the mains, the starting characteristics test device begins test, after hearing chimes of doom, and the flicker of the pilot lamp of viewing test circuit or the state that often goes out, namely corresponding measured switch occurs unusually, stops test unit and records the open and close number of times of measured switch.
The present invention is used for the test circuit of switch life, and the number of measured switch wherein can be for more than 1,2 or 3, and the number of light emitting diode should be more than 1,2 or 3 mutually.
If the quantity of the measured switch of series connection is more than 3, the negative pole of all light emitting diodes of display unit connects together and is concatenated into the input end of time relay TL as output terminal, and another input end of the time relay is connected another output terminal of power supply.
Power supply is the direct supply that the negative pole of battery BT1 is serially connected with current-limiting resistance R, so be connected across the two ends of the measured switch of series connection.Numbering as the light emitting diode of malfunction indicator lamp is generally maximum, and the positive pole of battery BT1 is connected with positive pole as the light emitting diode of malfunction indicator lamp.As the identification pilot lamp, their positive pole is connected to each corresponding series connection node of the measured switch of series connection respectively to other light emitting diode successively respectively.
In the process of the test of open and close repeatedly, the measured switch of series connection is opened a way simultaneously or is closed simultaneously.When any one measured switch disconnects unusually, bypass can not take place in electric current, electric current passes through light emitting diode, time relay TL, current-limiting resistance R as malfunction indicator lamp successively from the positive pole of battery BT1, get back to the negative pole of battery BT1, light emitting diode Chang Liang as malfunction indicator lamp, the output terminal time-delay conducting of the time relay, the audible alarm unit gets electric alarm.
When n measured switch as durability test disconnects unusually, as corresponding n the light emitting diode of identification pilot lamp with as the LED flash of the numbering of identifying pilot lamp greater than n; Extinguish as the light emitting diode of the numbering of identifying pilot lamp less than n.
If the quantity of the measured switch of series connection is 2, power supply is the direct supply that the negative pole of battery BT1 is serially connected with current-limiting resistance R, is connected across the two ends of the measured switch of two series connection.The positive pole of battery BT1 is connected with positive pole as the light emitting diode of malfunction indicator lamp, and positive pole as the light emitting diode of identification pilot lamp is connected to the node of series connection of two measured switch of series connection.
In the process of the test of open and close repeatedly, the measured switch of series connection is opened a way simultaneously or is closed simultaneously.When any one measured switch disconnects unusually, bypass can not take place in electric current, electric current passes through light emitting diode, time relay TL, current-limiting resistance R as malfunction indicator lamp successively from the positive pole of battery BT1, get back to the negative pole of battery BT1, light emitting diode Chang Liang as malfunction indicator lamp, the output terminal conducting of the time relay, the audible alarm unit gets electric alarm.
When disconnecting unusually with the anodal measured switch that is connected of battery BT1, extinguish as the light emitting diode of identifying pilot lamp.When the measured switch that is connected with current-limiting resistance R disconnects unusually, as the LED flash of identification pilot lamp.
If the quantity of measured switch is 1, power supply is the direct supply that the negative pole of battery BT1 is serially connected with current-limiting resistance R, is connected across the two ends of this measured switch.The positive pole of battery BT1 is connected with positive pole as the light emitting diode of malfunction indicator lamp.
In the process of the test of open and close repeatedly, when this measured switch disconnects unusually, bypass can not take place in electric current, electric current passes through light emitting diode, time relay TL, current-limiting resistance R as malfunction indicator lamp successively from the positive pole of battery BT1, get back to the negative pole of battery BT1, as the light emitting diode Chang Liang of malfunction indicator lamp, the output terminal conducting of the time relay, the audible alarm unit gets electric alarm.
The present invention is used for the test circuit of switch life, also can cancel the audible alarm unit.When normal when bright as the light emitting diode of malfunction indicator lamp, the output terminal time-delay conducting of the time relay can be used for other panalarm of control, such as the long distance wireless alarm.
The present invention is used for the test circuit of switch life, advantages such as simple, reliable are arranged, by buzzer warning, thereby it is unusual to realize that certain switch sample of caution experimenter occurs, and has solved the accuracy and the problem that reduces experimenter's working strength of switch life test figure.
Foregoing is preferred embodiment of the present invention only, is not the present invention is carried out the scope restriction.Those skilled in the art can carry out corresponding flexible or modification very easily according to main design of the present invention and spirit.So protection scope of the present invention should be as the criterion with the covering scope of claim.
Claims (9)
1. a test circuit that is used for switch life is characterized in that, comprising: power supply, light show unit, the time relay, audible alarm unit and current-limiting resistance;
Described power supply, current-limiting resistance and measured switch are formed current return;
The input end that described light shows unit and the time relay is connected in series, and the apparent unit of the light after being connected in series and time relay place branch road are connected in the two ends of measured switch again in parallel;
One output terminal of the described time relay is in series with an end of audible alarm unit and is connected, and the back that is connected in series is connected in the measured switch two ends in parallel by another output terminal of the time relay and the other end of audible alarm unit.
2. according to the described test circuit for switch life of claim 1, it is characterized in that described power supply is direct supply.
3. according to the described test circuit for switch life of claim 1, it is characterized in that the quantity of described measured switch is one.
4. according to the described test circuit for switch life of claim 3, it is characterized in that the quantity that described light shows the unit is one.
5. according to the described test circuit for switch life of claim 1, it is characterized in that the quantity of described measured switch is more than two, and measured switch is connected in series mutually.
6. according to the described test circuit for switch life of claim 5, it is characterized in that, it is consistent with the quantity of measured switch that described light shows the quantity of unit, and the end that light shows the unit is connected with an end of measured switch, and the other end of the apparent unit of light is connected with an input end of the time relay.
7. according to claim 1,3 or 5 described test circuits for switch life, it is characterized in that it is LED that described light shows the unit, and the negative pole of LED links to each other with an input end of the time relay, the positive pole of LED links to each other with the power input of measured switch.
8. according to the described test circuit for switch life of claim 1, it is characterized in that described audible alarm unit comprises hummer.
9. according to the described test circuit for switch life of claim 8, it is characterized in that described hummer is the low pressure hummer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210046136.7A CN103293470B (en) | 2012-02-27 | 2012-02-27 | Test circuit for switch life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210046136.7A CN103293470B (en) | 2012-02-27 | 2012-02-27 | Test circuit for switch life |
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| Publication Number | Publication Date |
|---|---|
| CN103293470A true CN103293470A (en) | 2013-09-11 |
| CN103293470B CN103293470B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210046136.7A Expired - Fee Related CN103293470B (en) | 2012-02-27 | 2012-02-27 | Test circuit for switch life |
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| Country | Link |
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| CN (1) | CN103293470B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589370A (en) * | 2017-09-21 | 2018-01-16 | 天津市百利电气有限公司 | Electrothermal relay Characteristics Detection test product acts display device and control method |
| CN108445387A (en) * | 2018-05-30 | 2018-08-24 | 江苏七维测试技术有限公司 | A kind of electromagnetic relay reliability test box |
| CN110187269A (en) * | 2019-06-21 | 2019-08-30 | 江苏伊施德创新科技有限公司 | A kind of relay full load test reduces the method and device of energy consumption |
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| US5903157A (en) * | 1995-02-06 | 1999-05-11 | Siemens Aktiengesellschaft | Measuring system for enclosed high-voltage switchgear |
| JP2007183171A (en) * | 2006-01-06 | 2007-07-19 | Chugoku Electric Power Co Inc:The | Device and method for testing distribution line relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107589370A (en) * | 2017-09-21 | 2018-01-16 | 天津市百利电气有限公司 | Electrothermal relay Characteristics Detection test product acts display device and control method |
| CN108445387A (en) * | 2018-05-30 | 2018-08-24 | 江苏七维测试技术有限公司 | A kind of electromagnetic relay reliability test box |
| CN108445387B (en) * | 2018-05-30 | 2023-09-19 | 江苏七维测试技术有限公司 | Electromagnetic relay reliability test box |
| CN110187269A (en) * | 2019-06-21 | 2019-08-30 | 江苏伊施德创新科技有限公司 | A kind of relay full load test reduces the method and device of energy consumption |
| CN110187269B (en) * | 2019-06-21 | 2024-03-29 | 江苏伊施德创新科技有限公司 | Method and device for reducing energy consumption in relay full-load test |
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| CN103293470B (en) | 2016-06-22 |
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