CN103292972A - Secondary impact prevention circuit and impact testing device - Google Patents
Secondary impact prevention circuit and impact testing device Download PDFInfo
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- CN103292972A CN103292972A CN2012100526094A CN201210052609A CN103292972A CN 103292972 A CN103292972 A CN 103292972A CN 2012100526094 A CN2012100526094 A CN 2012100526094A CN 201210052609 A CN201210052609 A CN 201210052609A CN 103292972 A CN103292972 A CN 103292972A
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- ram hammer
- partial pressure
- pressure unit
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Abstract
The invention relates to a secondary impact prevention circuit which comprises an impact hammer falling detection module, a high-level pickup module and an impact hammer blocking control module which are connected in sequence; the impact hammer falling detection module is used for outputting a high level when detecting falling movement of an impact hammer, and the high-level pickup module is used for controlling the impact hammer blocking control module to send out blocking signals when receiving the high level to intercept the impact hammer. The invention further relates to an impact testing device. According to the secondary impact prevention circuit and the impact testing device, the signals are collected automatically by means of a circuit, a mechanical structure is controlled to carry out interception on the impact hammer automatically, secondary impact of the impact hammer is blocked, the impact testing device can only carry out one-shot impact on a tested product, and therefore testing precision is improved.
Description
[technical field]
The present invention relates to the shock-testing field, particularly relate to a kind of anti-secondary pulse circuit, also relate to a kind of apparatus for impact testing.
[background technology]
In the work that light fixture is tested, need the intensity of test lamp outer casing, specifically be to investigate with shock-testing.In GB (GB) 3836.1 standards the inside such regulation is arranged: glass transparent spare should be tested at three samples, and each sample is only tested once.
Yet traditional scheme that light fixture is carried out shock-testing is to allow ram hammer do the movement of falling object impacting the tube the inside, impacts the point that will impact.Because impacting tube is straight barrel type, so after ram hammer impacts object in the process of impacting, can bounce, and then fall, impact object again.Can repeated multiple times impact glass transparent spare like this, injure glass transparent spare easily.In addition, twice impact do not meet testing standard yet, can cause test result inaccurate.
[summary of the invention]
Based on this, be necessary to provide a kind of anti-secondary pulse circuit.
A kind of anti-secondary pulse circuit comprises that the ram hammer whereabouts detection module, high level pickup model and the ram hammer that are linked in sequence stop control module; Described ram hammer whereabouts detection module is used for output high level when detecting the drop action of ram hammer, described high level pickup model is used for controlling described ram hammer and stops that control module sends block signal when receiving described high level, tackle described ram hammer; The input end of described ram hammer whereabouts detection module connects power input interface, and described ram hammer whereabouts detection module comprises light-emitting component, photoresistance, first partial pressure unit, second partial pressure unit, the 3rd partial pressure unit and first operational amplifier; Described light-emitting component is connected between power input interface and the ground wire; One end of described photoresistance connects described power input interface, and the other end is by the described first partial pressure unit ground connection, and the other end of described photoresistance connects the inverting input of described first operational amplifier; One end of described second partial pressure unit connects described power input interface, and the other end of described second partial pressure unit is by described the 3rd partial pressure unit ground connection, and the other end of described second partial pressure unit connects the in-phase input end of described first operational amplifier; The output terminal of described first operational amplifier connects described high level pickup model; Described photoresistance is used for receiving the light that described light-emitting component sends, and the both sides of the whereabouts route of described ram hammer are located in described light-emitting component and photoresistance respectively.
Preferably, also comprise normal open switch, one of described normal open switch is terminated between the output terminal and high level pickup model of described first operational amplifier, the other end ground connection of described normal open switch.
Preferably, described high level pickup model comprises first current-limiting resistance, second current-limiting resistance, the 3rd current-limiting resistance, the 4th partial pressure unit and one and door; Described first current-limiting resistance is connected between the end of the output terminal of described first operational amplifier and described normal open switch, described first input end with door is connected an end of described normal open switch and an end of first current-limiting resistance, described with the door first input end by described the 4th partial pressure unit ground connection, and described with the door first input end by described second current-limiting resistance is connected described with output terminal, described with second input end be connected described power input interface by described the 3rd current-limiting resistance.
Preferably, also comprise first filter capacitor, one of described first filter capacitor be terminated at described second current-limiting resistance and and the output terminal of door between, the other end ground connection of described first filter capacitor.
Preferably, described ram hammer stops that control module comprises switching tube and solenoid valve, described control end of switching tube connects the output terminal of described high level pickup model, first end of described switching tube connects an end of described solenoid valve, the other end of described solenoid valve connects described power input interface, the second end ground connection of described switching tube; Described solenoid valve is tackled described ram hammer at "on" position control ram hammer blocking mechanism, outside the no power state is controlled the impact path that described ram hammer blocking mechanism moves to ram hammer.
Preferably, described switching tube is the N-channel MOS pipe, and described control end is the grid of N-channel MOS pipe, and described first end is the drain electrode of N-channel MOS pipe, and described second end is the source electrode of N-channel MOS pipe.
Preferably, described power input interface is battery; Described anti-secondary pulse circuit also comprises the battery low-voltage prompting module that is connected between described battery and the ram hammer whereabouts detection module, and described battery low-voltage prompting module comprises the 5th partial pressure unit, the 6th partial pressure unit, the 7th partial pressure unit, voltage stabilizing diode, light emitting diode and second operational amplifier; The plus earth of described voltage stabilizing diode, the negative pole of described voltage stabilizing diode connect the normal phase input end of described second operational amplifier and an end of the 5th partial pressure unit, and the other end of described the 5th partial pressure unit connects the positive pole of described battery; One end ground connection of described the 7th partial pressure unit, the other end of described the 7th partial pressure unit connect the inverting input of described second operational amplifier and an end of the 6th partial pressure unit, and the other end of described the 6th partial pressure unit connects the positive pole of described battery; The positive pole of described light emitting diode connects the output terminal of described second operational amplifier, the minus earth of described light emitting diode.
Preferably, also comprise second filter capacitor, described second filter capacitor one is terminated between described battery low-voltage prompting module and the ram hammer whereabouts detection module, the other end ground connection of described second filter capacitor.
Preferably, described light-emitting component is second light emitting diode, also is connected to the 4th current-limiting resistance between the negative pole of described second light emitting diode and the ground wire.
Also be necessary to provide a kind of apparatus for impact testing.
A kind of apparatus for impact testing, comprise the impact tube, be arranged at a ram hammer that impacts in the tube, ram hammer blocking mechanism and anti-secondary pulse circuit, described ram hammer blocking mechanism is tackled described ram hammer when receiving the block signal that described ram hammer stops that control module sends.
The apparatus for impact testing of above-mentioned anti-secondary pulse circuit is equipped with, utilize circuit to gather signal automatically, the control physical construction hammer that liquidates is automatically tackled, and blocks the second time of ram hammer and impacts, make apparatus for impact testing only can carry out one-shot to test product, thereby improved measuring accuracy.
[description of drawings]
Fig. 1 is the synoptic diagram of anti-secondary pulse circuit among the embodiment;
Fig. 2 is the circuit theory diagrams of anti-secondary pulse circuit among another embodiment;
Fig. 3 is the synoptic diagram of apparatus for impact testing among the embodiment.
[embodiment]
For purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Fig. 1 is the synoptic diagram of anti-secondary pulse circuit among the embodiment, comprises that the ram hammer whereabouts detection module 110, high level pickup model 120 and the ram hammer that are linked in sequence stop control module 130.Ram hammer whereabouts detection module 110 is used for output high level when detecting the drop action of ram hammer, and high level pickup model 120 is used for when receiving high level the control ram hammer and stops that control module 130 sends block signal, and the hammer that liquidates is tackled.The present invention also provides a kind of apparatus for impact testing that has adopted above-mentioned anti-secondary pulse circuit.Fig. 3 is the synoptic diagram of apparatus for impact testing among the embodiment, comprises impact tube 310, is arranged at ram hammer 320 and a ram hammer blocking mechanism 330 of impacting in the tube 310.The sidewall that impacts tube 310 1 ends offers jack 311, ram hammer blocking mechanism 330 moves horizontally when receiving the block signal that ram hammer stops that control module 130 sends, after ram hammer 320 impacted tested product and upsprings, tube 310 is outer to pass the interception of hammer 320 when carrying out the secondary whereabouts that liquidate of whereabouts route that jack 311 moves to ram hammer 320 from impacting.
The input end of ram hammer whereabouts detection module 110 connects power input interface.Ram hammer whereabouts detection module 110 comprises light-emitting component (being second LED 2 in the present embodiment), photoresistance R7, first partial pressure unit (being resistance R 8 in the present embodiment), second partial pressure unit (being resistance R 5 in the present embodiment), the 3rd partial pressure unit (being resistance R 6 in the present embodiment) and first operational amplifier.Light-emitting component is connected between power input interface and the ground wire, connects power input interface specific to the positive pole that in the present embodiment is second LED 2, negative pole and the 4th current-limiting resistance R9 series connection back ground connection.The end of photoresistance R7 connects power input interface, and the other end is by first partial pressure unit (resistance R 8) ground connection, and the other end of photoresistance R7 connects the inverting input of first operational amplifier.One end of second partial pressure unit (resistance R 5) connects power input interface, the other end of second partial pressure unit (resistance R 5) is by the 3rd partial pressure unit (resistance R 6) ground connection, and the other end of second partial pressure unit (resistance R 5) connects the in-phase input end of first operational amplifier.The output terminal of first operational amplifier connects high level pickup model 120.
Photoresistance R7 is used for receiving the light that light-emitting component sends, and light-emitting component and photoresistance R7 are located at the both sides of the whereabouts route of ram hammer respectively, and are positioned at same horizontal level.Understandable, in other embodiments, second LED 2 can adopt other emitting components to replace, for example neon tube etc.
Above-mentioned anti-secondary pulse circuit, when "on" position and ram hammer do not fall, light-emitting component gets electroluminescence, the illumination of sending is received by photoresistance R7, the resistance of photoresistance this moment R7 is very little, pressure drop on the photoresistance R7 is also very little, the voltage of the reverse input end input of first operational amplifier is higher than the voltage of positive input input, the output terminal output low level of first operational amplifier, because high level pickup model 120 does not pick up high level, therefore ram hammer stops that control module 130 is failure to actuate, and it is unimpeded to impact tube.
When ram hammer falls, the light of light-emitting component directive photoresistance R7 can temporarily be stopped, the resistance phase strain of photoresistance R7 is big, cause the voltage of the reverse input end input of first operational amplifier to be lower than the voltage that positive input is imported, the output terminal output high level of first operational amplifier.High level pickup model 120 receives high level, and the control ram hammer stops that control module 130 sends block signal, and the ram hammer after impact is upspring to tested light fixture recoil is tackled, and stops it to fall again, impacts the measured object surface second time.
Therefore, the apparatus for impact testing of above-mentioned anti-secondary pulse circuit is equipped with, utilize physical construction and circuit to gather signal automatically, automatically the hammer that liquidates is tackled, blocking the second time of ram hammer impacts, make apparatus for impact testing only can carry out one-shot to test product, thereby improved measuring accuracy.
In embodiment illustrated in fig. 1, anti-secondary pulse circuit also comprises normal open switch SW3.When the shift bar of normal open switch SW3 was not pressed, switch disconnected; Switch closure when shift bar is pressed, the openhanded back switch of opening recovers off-state again.One of normal open switch SW3 is terminated between the output terminal and high level pickup model 120 of first operational amplifier, the other end ground connection of normal open switch SW3.Normal open switch SW3 is used for (when closure) and drags down the level that high level pickup model 120 picks up by force.
In the embodiment shown in fig. 1, first operational amplifier adopts LM358, also can adopt the operational amplifier of other model in other embodiments.
Fig. 2 is the circuit theory diagrams of anti-secondary pulse circuit among another embodiment.In this embodiment, high level pickup model 120 comprises the first current-limiting resistance R11, the second current-limiting resistance R12, the 3rd current-limiting resistance R10, the 4th partial pressure unit (being resistance R 13 in the present embodiment) and one and door.
The first current-limiting resistance R11 is connected between the end of the output terminal of first operational amplifier and normal open switch SW3, be connected the end that normal open switch SW3 is connected with the first current-limiting resistance R11 with the first input end of door, pass through the 4th partial pressure unit (resistance R 13) ground connection with the first input end of door, and also be connected output terminal with door by the second current-limiting resistance R12 with the first input end of door, be connected power input interface with second input end of door by the 3rd current-limiting resistance R10.
In the present embodiment, above-mentionedly adopt a 74LS08 with door, also can adopt other model in other embodiments with door.
In embodiment illustrated in fig. 2, high level pickup model 120 also comprises the first filter capacitor C2.One of the first filter capacitor C2 be terminated at the second current-limiting resistance R12 and and the output terminal of door between, the other end ground connection of the first filter capacitor C2.The first filter capacitor C2 is used for energy storage filtering.
Above-mentioned ram hammer stops that control module 130 comprises switching tube Q1 and solenoid valve.The control end of switching tube Q1 connects the output terminal of high level pickup model 120, i.e. the output terminal of above-mentioned and door, and first end of switching tube Q1 connects an end of solenoid valve, and the other end of solenoid valve connects power input interface, the second end ground connection of switching tube Q1.Solenoid valve Q1 is used for moving to outside the impact path of ram hammer at no power state control ram hammer blocking mechanism at "on" position control ram hammer blocking mechanism interception ram hammer.
In one embodiment, switching tube Q1 is the N-channel MOS pipe, and control end is the grid of N-channel MOS pipe, and first end is the drain electrode of N-channel MOS pipe, and second end is the source electrode of N-channel MOS pipe.Be connected to current-limiting resistance R14 between the output terminal of the grid of N-channel MOS pipe and first operational amplifier.In other embodiments, switching tube Q1 also can adopt other components and parts, for example NPN type triode.
And the output terminal of door by the second current-limiting resistance R12 and and the first input end of door between form a positive feedback, after first operational amplifier has been exported a high level, can keep high level output with the output terminal of door always, be i.e. this moment and Men Youyi self-locking, pin present state.No matter first operational amplifier is output high level or low level afterwards, do not influence with the high level of door and export, solenoid valve can be kept "on" position always, and the ram hammer blocking mechanism can be in the state of interception ram hammer always.If the ram hammer blocking mechanism will be set back (position that the hammer that do not liquidate stops), then need press SW3, will be drop-down with the current potential of the first input end of door be zero, be output as low level with door this moment, simultaneously feed back to first input end through the second current-limiting resistance R12, so switching tube Q1 ends the solenoid valve outage, the ram hammer blocking mechanism sets back, and impacts tube and recovers unimpeded.
In order to guarantee that the ram hammer blocking mechanism can be in appropriate action on opportunity, need by adjusting each component parameter and the position of ram hammer blocking mechanism on the ram hammer falling direction of anti-secondary pulse circuit, in order to avoid the reaction of ram hammer blocking mechanism is too fast, just kept off on the motion path at ram hammer when also bounce-back puts in place at ram hammer, so that ram hammer is blocked in impact tube outside; Perhaps the reaction of ram hammer blocking mechanism is too slow, and ram hammer falls behind just action again down.
In embodiment illustrated in fig. 2, adopt lithium battery V1 to import as power supply.Be connected to charge port SW1 between the both positive and negative polarity of lithium battery V1, to battery charge, perhaps directly provide the power supply input for anti-secondary pulse circuit by charge port SW1 for charger.Anti-secondary pulse circuit also comprises the battery low-voltage prompting module that is connected between lithium battery V1 and the ram hammer whereabouts detection module 110, comprises the 5th partial pressure unit (resistance R 1 in the present embodiment), the 6th partial pressure unit (resistance R 2 in the present embodiment), the 7th partial pressure unit (resistance R 3 in the present embodiment), voltage stabilizing diode Z1, LED 1 and second operational amplifier.The plus earth of voltage stabilizing diode Z1, the negative pole of voltage stabilizing diode Z1 connect the normal phase input end of second operational amplifier and an end of resistance R 1, and the other end of resistance R 1 connects the positive pole of battery.One end ground connection of resistance R 3, the other end of resistance R 3 connect the inverting input of second operational amplifier and an end of resistance R 2, and the other end of resistance R 2 connects the positive pole of lithium battery V1.The positive pole of LED 1 connects the output terminal of second operational amplifier, the minus earth of LED 1.
Anti-secondary pulse circuit when work, lithium battery V1 power supply, cell voltage slowly descends, resistance R 3 minutes voltage also slowly descend, and that the pressure drop on the voltage stabilizing diode Z1 is kept is constant substantially.When resistance R 3 minutes voltage when being lower than voltage on the voltage stabilizing diode Z1, second operational amplifier output noble potential, this moment, LED1 was bright, reminded the tester to charge the battery.The battery low-voltage prompting module is set, can before running down of battery, reminds the tester to change, avoid the actuation time that causes the ram hammer blocking mechanism occurring mistake because cell voltage hangs down excessively.
In embodiment illustrated in fig. 2, also be connected to circuit general switch SW2 between lithium battery V1 and the battery low-voltage prompting module.Understandable, in other embodiments, LED 1 can adopt other emitting components to replace, for example neon tube etc.Also be connected to current-limiting resistance R4 between LED 1 and the ground wire.Be connected to the second filter capacitor C1 between battery low-voltage prompting module and the ram hammer whereabouts detection module 110, the other end ground connection of the second filter capacitor C1.In embodiment illustrated in fig. 2, second operational amplifier adopts LM358, also can adopt the operational amplifier of other model in other embodiments.
If above-mentioned high level pickup model and ram hammer stop that it also is the mode of texturing of having done without departing from the inventive concept of the premise that control module changes the low level control mode into, should be within protection domain of the present invention.
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 claim of the present invention.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 (10)
1. an anti-secondary pulse circuit is characterized in that, comprises that the ram hammer whereabouts detection module, high level pickup model and the ram hammer that are linked in sequence stop control module; Described ram hammer whereabouts detection module is used for output high level when detecting the drop action of ram hammer, described high level pickup model is used for controlling described ram hammer and stops that control module sends block signal when receiving described high level, tackle described ram hammer;
The input end of described ram hammer whereabouts detection module connects power input interface, and described ram hammer whereabouts detection module comprises light-emitting component, photoresistance, first partial pressure unit, second partial pressure unit, the 3rd partial pressure unit and first operational amplifier; Described light-emitting component is connected between power input interface and the ground wire; One end of described photoresistance connects described power input interface, and the other end is by the described first partial pressure unit ground connection, and the other end of described photoresistance connects the inverting input of described first operational amplifier; One end of described second partial pressure unit connects described power input interface, and the other end of described second partial pressure unit is by described the 3rd partial pressure unit ground connection, and the other end of described second partial pressure unit connects the in-phase input end of described first operational amplifier; The output terminal of described first operational amplifier connects described high level pickup model;
Described photoresistance is used for receiving the light that described light-emitting component sends, and the both sides of the whereabouts route of described ram hammer are located in described light-emitting component and photoresistance respectively.
2. anti-secondary pulse circuit according to claim 1 is characterized in that, also comprises normal open switch, and one of described normal open switch is terminated between the output terminal and high level pickup model of described first operational amplifier, the other end ground connection of described normal open switch.
3. anti-secondary pulse circuit according to claim 2 is characterized in that, described high level pickup model comprises first current-limiting resistance, second current-limiting resistance, the 3rd current-limiting resistance, the 4th partial pressure unit and one and door;
Described first current-limiting resistance is connected between the end of the output terminal of described first operational amplifier and described normal open switch, described first input end with door is connected an end of described normal open switch and an end of first current-limiting resistance, described with the door first input end by described the 4th partial pressure unit ground connection, and described with the door first input end by described second current-limiting resistance is connected described with output terminal, described with second input end be connected described power input interface by described the 3rd current-limiting resistance.
4. anti-secondary pulse circuit according to claim 3 is characterized in that, also comprises first filter capacitor, one of described first filter capacitor be terminated at described second current-limiting resistance and and the output terminal of door between, the other end ground connection of described first filter capacitor.
5. anti-secondary pulse circuit according to claim 1, it is characterized in that, described ram hammer stops that control module comprises switching tube and solenoid valve, described control end of switching tube connects the output terminal of described high level pickup model, first end of described switching tube connects an end of described solenoid valve, the other end of described solenoid valve connects described power input interface, the second end ground connection of described switching tube; Described solenoid valve is tackled described ram hammer at "on" position control ram hammer blocking mechanism, outside the no power state is controlled the impact path that described ram hammer blocking mechanism moves to ram hammer.
6. anti-secondary pulse circuit according to claim 5 is characterized in that, described switching tube is the N-channel MOS pipe, and described control end is the grid of N-channel MOS pipe, and described first end is the drain electrode of N-channel MOS pipe, and described second end is the source electrode of N-channel MOS pipe.
7. anti-secondary pulse circuit according to claim 1 is characterized in that, described power input interface is battery; Described anti-secondary pulse circuit also comprises the battery low-voltage prompting module that is connected between described battery and the ram hammer whereabouts detection module, and described battery low-voltage prompting module comprises the 5th partial pressure unit, the 6th partial pressure unit, the 7th partial pressure unit, voltage stabilizing diode, light emitting diode and second operational amplifier;
The plus earth of described voltage stabilizing diode, the negative pole of described voltage stabilizing diode connect the normal phase input end of described second operational amplifier and an end of the 5th partial pressure unit, and the other end of described the 5th partial pressure unit connects the positive pole of described battery; One end ground connection of described the 7th partial pressure unit, the other end of described the 7th partial pressure unit connect the inverting input of described second operational amplifier and an end of the 6th partial pressure unit, and the other end of described the 6th partial pressure unit connects the positive pole of described battery; The positive pole of described light emitting diode connects the output terminal of described second operational amplifier, the minus earth of described light emitting diode.
8. anti-secondary pulse circuit according to claim 7, it is characterized in that, also comprise second filter capacitor, described second filter capacitor one is terminated between described battery low-voltage prompting module and the ram hammer whereabouts detection module, the other end ground connection of described second filter capacitor.
9. anti-secondary pulse circuit according to claim 1 is characterized in that, described light-emitting component is second light emitting diode, also is connected to the 4th current-limiting resistance between the negative pole of described second light emitting diode and the ground wire.
10. apparatus for impact testing, comprise and impact tube and be arranged at the described ram hammer that impacts in the tube, it is characterized in that, also comprise the ram hammer blocking mechanism and according to any described anti-secondary pulse circuit among the claim 1-9, described ram hammer blocking mechanism is tackled described ram hammer when receiving the block signal that described ram hammer stops that control module sends.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210052609.4A CN103292972B (en) | 2012-03-01 | 2012-03-01 | Anti-secondary pulse circuit and apparatus for impact testing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210052609.4A CN103292972B (en) | 2012-03-01 | 2012-03-01 | Anti-secondary pulse circuit and apparatus for impact testing |
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| CN103292972A true CN103292972A (en) | 2013-09-11 |
| CN103292972B CN103292972B (en) | 2016-09-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464286U (en) * | 2009-06-30 | 2010-05-12 | 上海华龙测试仪器有限公司 | Second hit preventing device of drop hammer impact testing machine |
| CN201509345U (en) * | 2009-10-23 | 2010-06-16 | 山东华琪电器有限公司 | Light-operated circuit |
| KR20110118005A (en) * | 2010-04-22 | 2011-10-28 | (주)청아아이앤시 | Apparatus for testing of safety net impact |
| CN102291866A (en) * | 2010-06-17 | 2011-12-21 | 富士迈半导体精密工业（上海）有限公司 | Lamp control circuit |
| CN102313639A (en) * | 2010-07-07 | 2012-01-11 | 鸿富锦精密工业（深圳）有限公司 | Mechanical strength testing device |
-
2012
- 2012-03-01 CN CN201210052609.4A patent/CN103292972B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464286U (en) * | 2009-06-30 | 2010-05-12 | 上海华龙测试仪器有限公司 | Second hit preventing device of drop hammer impact testing machine |
| CN201509345U (en) * | 2009-10-23 | 2010-06-16 | 山东华琪电器有限公司 | Light-operated circuit |
| KR20110118005A (en) * | 2010-04-22 | 2011-10-28 | (주)청아아이앤시 | Apparatus for testing of safety net impact |
| CN102291866A (en) * | 2010-06-17 | 2011-12-21 | 富士迈半导体精密工业（上海）有限公司 | Lamp control circuit |
| CN102313639A (en) * | 2010-07-07 | 2012-01-11 | 鸿富锦精密工业（深圳）有限公司 | Mechanical strength testing device |
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Granted publication date: 20160907 Termination date: 20190301 |