CN100554910C - Automatic changing photocoagulation goggles response characteristics test system - Google Patents
Automatic changing photocoagulation goggles response characteristics test system Download PDFInfo
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- CN100554910C CN100554910C CNB2007101562082A CN200710156208A CN100554910C CN 100554910 C CN100554910 C CN 100554910C CN B2007101562082 A CNB2007101562082 A CN B2007101562082A CN 200710156208 A CN200710156208 A CN 200710156208A CN 100554910 C CN100554910 C CN 100554910C
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- stepper motor
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Abstract
The invention discloses a kind of automatic changing photocoagulation goggles response characteristics test system.It is to be made of white light source, collimation lens, sample, sample stage, photomultiplier, triggering light source, acquisition control circuit, computing machine, stepper motor, stepper motor driver; Same optical axis is provided with white light source, collimation lens, sample stage, photomultiplier, photomultiplier is connected with acquisition control circuit, computing machine, triggering light source is connected with acquisition control circuit, computing machine, sample places on the sample stage, sample stage is provided with stepper motor, and stepper motor is connected with stepper motor driver, acquisition control circuit.The present invention has adopted portable sample stage, can measure the response time of active welding filter diverse location; Adopt semiconductor light sources as triggering light source, only needed the driving voltage of light source is carried out fast modulation, just can obtain the pulse light intensity; Adopt the sleeve spring device, laser instrument is pressed on the detector of sample, make the laser instrument can light leak.
Description
Technical field
The present invention relates to a kind of automatic changing photocoagulation goggles response characteristics test system.
Background technology
The automatic beam change welding goggles is that order equipment is protected in the novel welding that the characteristic of utilizing liquid crystal panel to change rapidly between the light and shade attitude is made.Active welding filter has comprised liquid crystal panel, driving circuit, photodetector.Before the welding, liquid crystal panel is in pellucidity.During welding, the high light that electric welding is sent triggers photodetector, makes photodetector output high level, and control Driver Circuit is closed liquid crystal panel, makes liquid crystal panel be in the low transmission state.After welding stopped, liquid crystal panel automatically reverted to pellucidity again.Therefore use active welding filter, the Welder can clearly observe welding assembly all the time before and after welding, and does not need to remove welding mask.The major parameter of weighing the performance of active welding filter is the corresponding time of active welding filter.Because become opaque moment at active welding filter from transparent, the high light of welding gun has part and leaked active welding filter, thereby human eye is damaged.The corresponding time test equipment of active welding filter is less at present, and mostly there is following point: 1, adopt the mechanical shutter mode to trigger, complex structure not only, but also can relate to a series ofly such as problems such as beam size variation, measurement synchronization, operating difficulties, greatly influenced measuring accuracy.2, because the light intensity between the bright attitude of liquid crystal panel and the dark attitude changes greatly, its variable quantity reaches 10
5Magnitude, common single channel amplifier can't reach so big dynamic range.3, because the position difference of the photodetector of different active welding filters, so the triggering light source of fixed position is difficult to adapt to different active welding filter samples.4, response characteristic that can only the single position of specimen.
Summary of the invention
The objective of the invention is provides a kind of automatic changing photocoagulation goggles response characteristics test system in order to overcome the shortcoming of existing test macro.This system can realize the measurement of the automatic measurement active welding filter response characteristic of great dynamic range, degree of precision and diverse location.
Automatic changing photocoagulation goggles response characteristics test system is to be made of white light source, collimation lens, sample, sample stage, photomultiplier, triggering light source, acquisition control circuit, computing machine, stepper motor, stepper motor driver; Same optical axis is provided with white light source, collimation lens, sample stage, photomultiplier, photomultiplier is connected with acquisition control circuit, computing machine, triggering light source is connected with acquisition control circuit, computing machine, sample places on the sample stage, sample stage is provided with stepper motor, stepper motor is connected with stepper motor driver, acquisition control circuit, triggers light source and moves freely in the plane parallel with sample.
Described triggering light source is made of first sleeve, second sleeve, semiconductor light sources, base, magnet and spring; Wherein inlay magnet in the base, second sleeve is fixed on the base, is provided with semiconductor light sources in second sleeve, first jacket casing is outside second sleeve, be provided with spring between them, first sleeve is close to sample, and the front end of first sleeve is aimed at the photodetector on the sample.
The internal module annexation of described acquisition control circuit is: first amplifier that is connected with photomultiplier is connected with first analog to digital converter, single-chip microcomputer, second amplifier that is connected with photomultiplier is connected with second analog to digital converter, single-chip microcomputer, single-chip microcomputer is connected with buffer, and first amplifier has different enlargement factors with second amplifier.
The beneficial effect that the present invention has:
1, adopted portable sample stage, the response time that can measure the active welding filter diverse location;
2, adopted semiconductor light sources as triggering light source,, only needed the driving voltage of light source is carried out fast modulation, just can obtain the pulse light intensity, given up the triggering of mechanical shutter mode because semiconductor light sources itself has response faster;
3, with the mode fixed laser of magnet absorption, can carry out planar the optional position and fix, satisfy the requirement of different sample photodetector position differences; Simultaneously laser instrument adopts the sleeve spring device, laser instrument closely can be pressed on the detector of sample, makes the laser instrument can light leak;
4, adopt multichannel pmultiple amplifier and different enlargement factors, make No. two amplifiers cover the range of linearity of different brightness respectively, and then the data of the range of linearity are carried out the match splicing, to obtain big linear dynamic range.
5, can measure the photoelectric response characteristic of a plurality of positions of active welding filter automatically, have higher measuring accuracy and more succinct reliable structure, and operation is more easy than traditional approach.
Description of drawings
Fig. 1 is the structural representation of automatic changing photocoagulation goggles response characteristics test system;
Fig. 2 is the structural representation of triggering light source of the present invention;
Fig. 3 is an acquisition control circuit block diagram of the present invention;
Fig. 4 measures the curve fitting schematic diagram among the present invention.
Embodiment
Ultimate principle of the present invention is: collimate the directional light that is as the criterion by white light source by collimation lens, by sample, incide photomultiplier; By semiconductor light sources as triggering light source irradiation to the photodetector of eye protector; By the pulse of Single-chip Controlling semiconductor laser emission rectangular light, the triggering collection circuit carries out high speed acquisition to the photosignal of photomultiplier simultaneously; After measurement finishes the data of gathering are sent to computing machine and carry out data processing and calculating.Triggering fixedly having adopted of light source in the system can the attached mode of random positioned magnetic.The method of two-way amplifier and curve fitting has been adopted in the collection of signal, can reach 10
5Linear measurement range.As the specialized equipment of metering liquid crystal welding goggles product response time and retention time,
As shown in Figure 1, automatic changing photocoagulation goggles response characteristics test system is to be made of white light source 1, collimation lens 2, sample 3, sample stage 8, photomultiplier 4, triggering light source 5, acquisition control circuit 6, computing machine 7, stepper motor 9, stepper motor driver 10; Same optical axis is provided with white light source 1, collimation lens 2, sample stage 8, photomultiplier 4, photomultiplier 4 is connected with acquisition control circuit 6, computing machine 7, triggering light source 5 is connected with acquisition control circuit 6, computing machine 7, sample 3 places on the sample stage 8, sample stage 8 is provided with stepper motor 9, stepper motor 9 is connected with stepper motor driver 10, acquisition control circuit 6, triggers light source 5 and moves freely in the plane parallel with sample 3.
Collimate the directional light that is as the criterion by white light source by collimation lens,, incide photomultiplier by tested automatic beam change welding goggles sample.During measurement, computing machine sends instruction and gives acquisition control circuit, and acquisition control circuit is lighted the triggering light source.Acquisition control circuit begins to gather the photo-signal of photomultiplier output simultaneously.Acquisition control circuit sent measurement data to computing machine after measurement finished.
Sample is placed on the sample stage top in the measuring system, and sample stage drags by stepper motor, can move left and right.Measure computer-chronograph and send move, acquisition control circuit is accepted to send the Stepping Motor Control signal after the instruction, control signal input controllor for step-by-step motor, controllor for step-by-step motor drive stepping motor, thereby mobile example platform.When sample stage moved to a certain position, stepper motor stopped operating, and acquisition control circuit begins to start to trigger light source and begin to be measured, and again by stepper motor mobile example platform, carries out the measurement of another position after measurement finishes.
As shown in Figure 2, triggering light source 5 is made of first sleeve 51, second sleeve 52, semiconductor light sources 53, base 54, magnet 55 and spring 56; Wherein inlay magnet 55 in the base 54, second sleeve 52 is fixed on the base 54, be provided with semiconductor light sources 53 in second sleeve 52, first sleeve 51 is enclosed within outside second sleeve 52, be provided with spring 56 between them, the front end that first sleeve 51 is close to sample 3, the first sleeves 51 is aimed at the photodetector 31 on the sample 3.
Trigger on the irony flat board that light source can be adsorbed on the sample stage and sample parallels during measurement, the position of absorption can be determined arbitrarily.After putting sample well, trigger light source be adsorbed on sample on the corresponding place of photoelectric probe position, first sleeve stretches under the effect of spring outward, be adjacent at last on sample, the front end of first sleeve is aimed at the photodetector on the sample, can guarantee that rayed that semiconductor light sources sends is on the photodetector of sample.
Above-mentioned semiconductor light sources can adopt semiconductor laser or light emitting diode.Emission wavelength can select visible light also can select infrared light.
As shown in Figure 3, the internal module annexation of collection control circuit 6 is: first amplifier 61 that is connected with photomultiplier 4 is connected with first analog to digital converter 63, single-chip microcomputer 65, second amplifier 62 that is connected with photomultiplier 4 is connected with second analog to digital converter 64, single-chip microcomputer 65, single-chip microcomputer 65 is connected with buffer 66, and first amplifier 61 has different enlargement factors with second amplifier 62.
Single-chip microcomputer receives the measurement instruction that computing machine is sent during measurement, sends high level signal and lights semiconductor light sources, and single-chip microcomputer begins to gather the photo-signal that records from photomultiplier simultaneously.Because the response speed of automatic beam change welding goggles is very fast, requires the sample rate of single-chip microcomputer fast, therefore in order to save time, single-chip microcomputer is kept at the data that collect in the Cache earlier.Uniformly-spaced a period of time as 1 second after, the bright dark state of automatic beam change welding goggles has changed and has finished, single-chip microcomputer is read the data in the Cache, sends to computing machine.
Because the strong variation range of bright half-light of automatic beam change welding goggles is bigger, maximum can reach 10
5The order of magnitude, though the dynamic range of photomultiplier can reach this magnitude, amplifier can't reach.Therefore in acquisition control circuit, adopted two-way to send out device and analog to digital converter big.Photomultiplier connects first amplifier and second amplifier simultaneously during work.The enlargement factor of first amplifier is arranged on higher multiplying power, as 10
5, the enlargement factor of second amplifier is arranged on lower multiplying power, as 10
3Because the dynamic range of general amplifier has only 10
3About, if the variation range of measured signal is 10
-8To 10
-3, then for first amplifier, input signal signal more weak 10
-8-10
-5In the scope is linear amplification, surpasses 10
-5Then saturated.And to second amplifier, input signal is more weak 10
-8-10
-6Scope internal cause signal is too little can't be measured, and signal stronger 10
-6To 10
-3Be linear amplification.Therefore we are in the same place the signal of first amplifier than the strong part amalgamation of signal of the weak part and second amplifier 62, constitute a complete range of linearity 10
5About the measurement curve.The simulation amplifying signal that first amplifier and second amplifier obtain is converted to digital signal by first analog to digital converter and second analog to digital converter respectively and sends single-chip microcomputer to.
The approximating method of the signal data that is obtained by first amplifier, second amplifier and first analog to digital converter and second analog to digital converter as shown in Figure 4.Horizontal ordinate is the time among the figure, and ordinate is the size of the input signal that records.Solid line wherein is the signal curve that first amplifier records, and this curve is the range of linearity of first amplifier from the O point to the B point.Dotted line is the signal curve that second amplifier records, and is the linear amplification scope of second amplifier more than the C point wherein.When the enlargement factor of first amplifier and second amplifier is set, the linear amplification scope part superposition of No. two amplifiers, therefore overlap the zone at this, because measured signal is identical, their signal curve that records overlaps because of this.By the search of two groups of measurement data being found this coincidence zone, the center of getting them then is time cut-point A, and the time, the time was greater than the data that second amplifier records of getting of A less than the data that first amplifier records of getting of A.Such two partial datas connect into a complete measurement curve.
Above-mentioned curve fitting process can be carried out in single-chip microcomputer, also can carry out in computing machine.
Claims (2)
1, a kind of automatic changing photocoagulation goggles response characteristics test system is characterized in that it is by white light source (1), collimation lens (2), sample (3), sample stage (8), photomultiplier (4), triggers light source (5), acquisition control circuit (6), computing machine (7), stepper motor (9), stepper motor driver (10) formation; Same optical axis is provided with white light source (1), collimation lens (2), sample stage (8), photomultiplier (4), photomultiplier (4) is connected with acquisition control circuit (6), computing machine (7), triggering light source (5) is connected with acquisition control circuit (6), computing machine (7), sample (3) places on the sample stage (8), sample stage (8) is provided with stepper motor (9), stepper motor (9) is connected with stepper motor driver (10), acquisition control circuit (6), triggers light source (5) and moves freely in the plane parallel with sample (3); Described triggering light source (5) is made of first sleeve (51), second sleeve (52), semiconductor light sources (53), base (54), magnet (55) and spring (56); Wherein inlay magnet (55) in the base (54), second sleeve (52) is fixed on the base (54), be provided with semiconductor light sources (53) in second sleeve (52), first sleeve (51) is enclosed within outside second sleeve (52), be provided with spring (56) between them, first sleeve (51) is close to sample (3), and the front end of first sleeve (51) is aimed at the photodetector (31) on the sample (3).
2, a kind of automatic changing photocoagulation goggles response characteristics test system according to claim 1, the internal module annexation that it is characterized in that described acquisition control circuit (6) is: first amplifier (61) that is connected with photomultiplier (4) and first analog to digital converter (63), single-chip microcomputer (65) is connected, second amplifier (62) that is connected with photomultiplier (4) and second analog to digital converter (64), single-chip microcomputer (65) is connected, single-chip microcomputer (65) is connected with buffer (66), and first amplifier (61) has different enlargement factors with second amplifier (62).
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|---|---|---|---|
| CNB2007101562082A CN100554910C (en) | 2007-09-30 | 2007-09-30 | Automatic changing photocoagulation goggles response characteristics test system |
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| CNB2007101562082A CN100554910C (en) | 2007-09-30 | 2007-09-30 | Automatic changing photocoagulation goggles response characteristics test system |
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| CN100554910C true CN100554910C (en) | 2009-10-28 |
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| CN104655397B (en) * | 2013-11-19 | 2018-01-02 | 中国标准化研究院 | A kind of automatic darkening welding filter lens shade number and response time detection means |
| CN105910795B (en) * | 2016-04-06 | 2021-05-07 | 宁波卡瑞迈特电子科技有限公司 | Aging equipment and aging method for electric welding mask |
| CN106017870B (en) * | 2016-06-19 | 2021-05-07 | 宁波卡瑞迈特电子科技有限公司 | Welding mask detection device and detection method thereof |
| CN111982469B (en) * | 2020-08-04 | 2022-08-30 | 合肥登特菲医疗设备有限公司 | Detection device and detection method for CR light-receiving tube |
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Non-Patent Citations (2)
| Title |
|---|
| 自动变光焊接护目镜响应特性测试仪研究. 陈锋杰，李红俊，孙桂荣.中国安全科学学报，第15卷第3期. 2005 |
| 自动变光焊接护目镜响应特性测试仪研究. 陈锋杰，李红俊，孙桂荣.中国安全科学学报，第15卷第3期. 2005 * |
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