CN103852720A - Switch life test device - Google Patents
Switch life test device Download PDFInfo
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- CN103852720A CN103852720A CN201210510870.4A CN201210510870A CN103852720A CN 103852720 A CN103852720 A CN 103852720A CN 201210510870 A CN201210510870 A CN 201210510870A CN 103852720 A CN103852720 A CN 103852720A
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Abstract
A switch life test device comprises a switch test tool and a switch life test monitoring circuit. The switch life test monitoring circuit comprises a power supply module, a control module, multiple pairs of switch access points to be tested and light emitting diodes the same as the switch access points to be tested in number, wherein the power supply module has access to an external power supply so as to provide electricity for the control module, a switch to be tested has access to the switch access points to be tested and is connected with the light emitting diodes in series, the control module supplies operating currents to the light emitting diodes, the switch test tool automatically carries out turn-on and turn-off operations on the switch to be tested in the test process, the light emitting diodes give out light or go out along with turn-on or turn-off of the switch to be tested, and when the switch to be tested is turned on and the light emitting diodes do not give out the light, on-off frequency of the switch to be tested is recorded, namely the service life of the switch to be tested is obtained. The switch life test device is applied to various mechanical switches such as key switches and single-pole double-throw switches, conduction performance of the switch can be known through observation of the light emitting diodes, monitoring operations are easy to achieve and testing efficiency is high.
Description
Technical field
The present invention relates to a kind of component life proving installation, particularly relate to a kind of switch life proving installation.
Background technology
Along with scientific and technological development, electronic product kind increasing, switch is also more and more extensive as a kind of important control element application.But at present different product is different to the requirement in switch serviceable life, and the switch life that meets market user demand is all up to ten thousand times, some touch-switchs are wanted 100,000 hundreds of thousands even, therefore need testing the serviceable life of switch.
The test of traditional switch life is by push switch and records compression number, when switch occurs wearing and tearing, subsides the phenomenon such as maybe can not upspring time and check that the compression number of record just can draw the serviceable life of keyswitch.
This method of testing can only be carried out life test to push switch, cannot carry out life test to the mechanical switch of the other types such as single-pole double-throw (SPDT), and in test process, need to examine whether switch occurs wearing and tearing, the phenomenon such as maybe can not upspring of subsiding, monitoring complex operation, testing efficiency is low.
Summary of the invention
Based on this, being necessary to provide a kind of can carry out life test and monitor switch life proving installation easy and simple to handle dissimilar mechanical switch.
A kind of switch life proving installation, comprise switch testing frock and switch life test monitoring circuit, described switch testing frock is for automatically carrying out closed and disconnected operation to measured switch, and described switch life test monitoring circuit comprises supply module, control module, multipair measured switch access point and light emitting diode quantity being equated with described measured switch access point; The output terminal of described supply module is connected with described control module, and described supply module is for accessing external power source and being that described control module is powered by the output terminal output direct current of described supply module; Every pair of described measured switch access point is fixed in described switch testing frock, for accessing described measured switch; Each described light emitting diode is connected with a pair of described measured switch access point, and provides working current by described control module.
Therein in an embodiment, described control module comprises control chip, absorption inductor, building-out capacitor, the first pull down resistor and the second pull down resistor, the supply voltage input end of described control chip is connected with the output terminal of described supply module with signal voltage input end, the parallel connection of described multipair measured switch access point and one end connect the output terminal of described control chip, a low-power constant current control end of the each Access Control chip of the other end; Described absorption inductor one end is connected with the first switching node end of described control chip, and the other end is connected with the second switch node side of described control chip; The compensation end of described control chip is by described building-out capacitor ground connection; The high power programming end of described control chip is by described the first pull down resistor ground connection; The low-power programming end of described control chip is by described the second pull down resistor ground connection; First signal earth terminal, secondary signal earth terminal, power earth terminal and the equal ground connection of heat radiation earth terminal of described control chip.
In an embodiment, described low-power constant current control end, light emitting diode and measured switch access point are 5 to quantity therein.
In an embodiment, described switch life test monitoring circuit also comprises the current-limiting resistance that quantity equates with described light emitting diode therein, and each described current-limiting resistance is connected with a light emitting diode.
Therein in an embodiment, described supply module comprises the rectifier bridge for the alternating current of input is carried out the transformer of step-down and the alternating current after step-down carried out to rectification, described transformer comprises primary coil and secondary coil, described primary coil is used for inputting described alternating current, described secondary coil two ends are connected with first input end and second input end of described rectifier bridge respectively, the output terminal that the output terminal of described rectifier bridge is described supply module.
In an embodiment, described supply module comprises the first filter capacitor therein, and described first filter capacitor one end is connected with the output terminal of described rectifier bridge, other end ground connection.
In an embodiment, described supply module comprises voltage stabilizing chip therein, and the input end of described voltage stabilizing chip is connected with the output terminal of described rectifier bridge, and output terminal is connected with described control module, the earth terminal ground connection of described voltage stabilizing chip.
In an embodiment, described supply module comprises the second filter capacitor therein, and described second filter capacitor one end is connected with the output terminal of described voltage stabilizing chip, other end ground connection.
Above-mentioned switch life proving installation, utilize supply module access external power source to power for control module, measured switch access point measured switch being accessed and be fixed in switch testing frock is connected with light emitting diode, control module provides working current for light emitting diode, in test process, switch testing frock is carried out closed and disconnected operation to measured switch automatically, light emitting diode can be along with measured switch closure or disconnection and is luminous or extinguish, in the time that light emitting diode after closed measured switch is but not luminous, the break-make number of times of statistics measured switch is the serviceable life of measured switch.The present invention is all suitable for for the various mechanical switchs such as keyswitch, single-pole double-throw switch (SPDT), and just can know the quality of the conduction property of switch by observing light emitting diode, monitors simple to operately, and testing efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural drawing of switch life test monitoring circuit in an embodiment;
Fig. 2 is the schematic diagram of switch life test monitoring circuit in an embodiment.
Embodiment
A kind of switch life proving installation, comprises switch testing frock and switch life test monitoring circuit, and switch testing frock can be carried out closed and disconnected operation to measured switch automatically.As shown in Figure 1, switch life test monitoring circuit comprises supply module 110, control module 120, multipair measured switch access point and light emitting diode quantity being equated with measured switch access point.
L end and the N end of supply module 110 are used for accessing external power source, and output terminal is connected with control module 120, and it is that control module 120 is powered that supply module 110 is exported direct current; Every pair of measured switch access point comprises two measured switch access points, is fixed in switch testing frock, for accessing measured switch; Each light emitting diode is connected with a pair of measured switch access point, and provides working current by control module 120.
Above-mentioned switch life proving installation, utilizing supply module 110 to access external power source powers for control module 120, measured switch access point measured switch being accessed and be fixed in switch testing frock is connected with light emitting diode, control module 120 provides working current for light emitting diode, in test process, switch testing frock is carried out closed and disconnected operation to measured switch automatically, light emitting diode can be along with measured switch closure or disconnection and is luminous or extinguish, in the time that after closed measured switch, light emitting diode is not luminous, the break-make number of times of statistics measured switch is the serviceable life of measured switch.The present invention is all suitable for for the various mechanical switchs such as keyswitch, single-pole double-throw switch (SPDT), can carry out life test to multiple switches simultaneously, and just can know the quality of the conduction property of switch by observing light emitting diode, monitor simple to operately, testing efficiency is high.
Therein in an embodiment, the external power source of access is alternating current, as shown in Figure 2, supply module 110 comprises transformer T and rectifier bridge BD1, and transformer T comprises primary coil and secondary coil, and primary coil two ends connect respectively L end and N end, for input AC electricity, secondary coil two ends are connected with first input end and the second input end of rectifier bridge BD1 respectively, and the port one of rectifier bridge BD1 is that the output terminal of rectifier bridge BD1 is the output terminal of supply module 110, port 2 ground connection.The alternating current of input obtains direct current and exports control module 120 to from the output terminal 1 of rectifier bridge BD1 after transformer T step-down and rectifier bridge BD1 carry out rectification.
In addition, supply module 110 can also comprise the first filter capacitor C1 and the second filter capacitor C2, and first filter capacitor C1 one end is connected with the output terminal 1 of rectifier bridge BD1, other end ground connection; Second filter capacitor C2 one end is connected with the output terminal of voltage stabilizing chip Q1, other end ground connection; The first filter capacitor C1 and the second filter capacitor C2 are for absorption peak voltage.
Therein in an embodiment, control module 120 comprises control chip 122, absorption inductor L1, building-out capacitor C3, the first pull down resistor R6 and the second pull down resistor R7, control chip 122 can adopt LTC3452 chip, the supply voltage input end PVIN of control chip 122 is connected with the output terminal of supply module 110 with signal voltage input end VIN, all measured switch access points connect the output end vo ut of control chip 122, a low-power constant current control end of the each Access Control chip 122 of the other end to parallel connection and one end.Low-power constant current control end in the present embodiment, light emitting diode and measured switch access point are 5 to quantity, and measured switch access point is to A1-A2, A3-A4, A5-A6, A7-A8 and A9-A10 access respectively the first measured switch 210, the second measured switch 220, the 3rd measured switch 230, the 4th measured switch 240 and the 5th measured switch 250, and one end is connected with the output end vo ut of control chip 122, the other end respectively with the first LED 1, the second LED 2, the 3rd LED 3, the positive pole of the 4th LED 4 and the 5th LED 5 connects, the first LED 1, the second LED 2, the 3rd LED 3, the negative pole of the 4th LED 4 and the 5th LED 5 connects respectively the first low-power constant current control end LEDl1 of control chip 122, the second low-power constant current control end LEDl2, the 3rd low-power constant current control end LEDl3, the 4th low-power constant current control end LEDl4 and the 5th low-power constant current control end LEDl5.
Absorption inductor L1 one end is connected with the first switching node end sw1 of control chip 122, and the other end is connected with the second switch node side sw2 of control chip 122, and absorption inductor L1 is for absorption peak electric current; The compensation end VC of control chip 122 is by building-out capacitor C3 ground connection; The high power programming end ISETH of control chip 122 is by the first pull down resistor R6 ground connection; The low-power programming end ISETL of control chip 122 is by the second pull down resistor R7 ground connection; The first signal earth terminal of control chip 122 and secondary signal earth terminal all represent with GND and ground connection arranges, power earth terminal PGND and also equal ground connection of heat radiation earth terminal PAD.
According to circuit actual parameter, LTC3452 chip is programmed; can be limited in 20mA left and right by each low-power constant current control end Jiang Mei road output current; 5 tunnel parallel connections afterwards total output current in 100mA left and right; and can edit according to demand Protection parameters; utilize LTC3452 chip controls constant current output, for each light emitting diode provides steady current, export precise and stable; and it is also smaller to control electric current, is particularly suitable for all kinds of touch-switchs.
Switch life test monitoring circuit also comprises the first current-limiting resistance R1, the second current-limiting resistance R2, the 3rd current-limiting resistance R3, the 4th current-limiting resistance R4 and the 5th current-limiting resistance R5 that connect with the first LED 1, the second LED 2, the 3rd LED 3, the 4th LED 4 and the 5th LED 5 respectively, current-limiting resistance can protect light emitting diode in the time that measured switch is closed, avoid because of instantaneous pressure breakdown.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a switch life proving installation, it is characterized in that, comprise switch testing frock and switch life test monitoring circuit, described switch testing frock is for automatically carrying out closed and disconnected operation to measured switch, and described switch life test monitoring circuit comprises supply module, control module, multipair measured switch access point and light emitting diode quantity being equated with measured switch access point;
The output terminal of described supply module is connected with described control module, and described supply module is for accessing external power source and being that described control module is powered by the output terminal output direct current of described supply module;
Every pair of described measured switch access point is fixed in described switch testing frock, for accessing described measured switch;
Each described light emitting diode is connected with a pair of described measured switch access point, and provides working current by described control module;
Described control module comprises control chip, absorption inductor, building-out capacitor, the first pull down resistor and the second pull down resistor; The supply voltage input end of described control chip is connected with the output terminal of described supply module with signal voltage input end, the parallel connection of described multipair measured switch access point and one end connect the output terminal of described control chip, a low-power constant current control end of the each Access Control chip of the other end; Described absorption inductor one end is connected with the first switching node end of described control chip, and the other end is connected with the second switch node side of described control chip; The compensation end of described control chip is by described building-out capacitor ground connection; The high power programming end of described control chip is by described the first pull down resistor ground connection; The low-power programming end of described control chip is by described the second pull down resistor ground connection; First signal earth terminal, secondary signal earth terminal, power earth terminal and the equal ground connection of heat radiation earth terminal of described control chip.
2. switch life proving installation according to claim 1, is characterized in that, described low-power constant current control end, light emitting diode and measured switch access point are 5 to quantity.
3. switch life proving installation according to claim 1 and 2, is characterized in that, described switch life test monitoring circuit also comprises the current-limiting resistance that quantity equates with described light emitting diode, and each described current-limiting resistance is connected with a light emitting diode.
4. switch life proving installation according to claim 1, it is characterized in that, described supply module comprises the rectifier bridge for the alternating current of input is carried out the transformer of step-down and the alternating current after step-down carried out to rectification, described transformer comprises primary coil and secondary coil, described primary coil is used for inputting described alternating current, described secondary coil two ends are connected with first input end and second input end of described rectifier bridge respectively, the output terminal that the output terminal of described rectifier bridge is described supply module.
5. switch life proving installation according to claim 4, is characterized in that, described supply module comprises the first filter capacitor, and described first filter capacitor one end is connected with the output terminal of described rectifier bridge, other end ground connection.
6. switch life proving installation according to claim 4, it is characterized in that, described supply module comprises voltage stabilizing chip, and the input end of described voltage stabilizing chip is connected with the output terminal of described rectifier bridge, output terminal is connected with described control module, the earth terminal ground connection of described voltage stabilizing chip.
7. switch life proving installation according to claim 6, is characterized in that, described supply module comprises the second filter capacitor, and described second filter capacitor one end is connected with the output terminal of described voltage stabilizing chip, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210510870.4A CN103852720A (en) | 2012-11-29 | 2012-11-29 | Switch life test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210510870.4A CN103852720A (en) | 2012-11-29 | 2012-11-29 | Switch life test device |
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| Publication Number | Publication Date |
|---|---|
| CN103852720A true CN103852720A (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210510870.4A Pending CN103852720A (en) | 2012-11-29 | 2012-11-29 | Switch life test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325163A (en) * | 2016-09-20 | 2017-01-11 | 歌尔科技有限公司 | Switch monitoring circuit and electronic device |
| CN110514992A (en) * | 2019-08-30 | 2019-11-29 | 中国航发动力股份有限公司 | A kind of switching component detection circuit and detector |
| CN113267720A (en) * | 2021-05-10 | 2021-08-17 | 恒银金融科技股份有限公司 | Door magnetic switch service life testing system and method for financial equipment |
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| JPH08201002A (en) * | 1995-01-27 | 1996-08-09 | Mitsubishi Heavy Ind Ltd | Characteristic tester for switch |
| CN102768108A (en) * | 2011-05-05 | 2012-11-07 | 海洋王照明科技股份有限公司 | Switch service life testing device |
| CN202091341U (en) * | 2011-05-27 | 2011-12-28 | 浙江吉利汽车研究院有限公司 | Connecting rod of automobile engine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325163A (en) * | 2016-09-20 | 2017-01-11 | 歌尔科技有限公司 | Switch monitoring circuit and electronic device |
| CN106325163B (en) * | 2016-09-20 | 2019-09-17 | 歌尔科技有限公司 | A kind of monitoring switch circuit and electronic equipment |
| CN110514992A (en) * | 2019-08-30 | 2019-11-29 | 中国航发动力股份有限公司 | A kind of switching component detection circuit and detector |
| CN113267720A (en) * | 2021-05-10 | 2021-08-17 | 恒银金融科技股份有限公司 | Door magnetic switch service life testing system and method for financial equipment |
| CN113267720B (en) * | 2021-05-10 | 2023-03-14 | 恒银金融科技股份有限公司 | Door magnetic switch service life testing system and method for financial equipment |
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Application publication date: 20140611 |