CN1133071C - Three-in-one photoelectric coupler - Google Patents
Three-in-one photoelectric coupler Download PDFInfo
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- CN1133071C CN1133071C CN 01102264 CN01102264A CN1133071C CN 1133071 C CN1133071 C CN 1133071C CN 01102264 CN01102264 CN 01102264 CN 01102264 A CN01102264 A CN 01102264A CN 1133071 C CN1133071 C CN 1133071C
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- photoelectric coupler
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Abstract
The present invention relates to a photoelectric coupler used in a detecting device of a laser pulse distance meter, which comprises a synchronizing pulse generator, an energy detector, a presettable precision delayer, a presettable pulse amplitude controller, a narrow pulse drive signal generator, a light pulse generating and transmitting system and an optical attenuator. The present invention integrates the laser energy detection, the pulse synchronous signal extraction and target echo signal simulation and back-feeding into one unit, so that the detecting device can realize non-contact non-disintegrated nondestructive detection on multinomial performance indexes to various laser distance meters.
Description
The present invention relates to a kind of pick-up unit that is used for the detection laser tellurometer, specifically the photoelectrical coupler in the pick-up unit.
The Performance Detection of laser pulse ranging device is to be taken apart by checking device at present, adds the pulse producer probe, will be taken the field together by test examination instrument and pick-up unit again after connecting, and tests according to selected material object.The index that is detected generally also only has distance accuracy, multiple goal resolution characteristic etc.This traditional detection Device Testing method is a kind of by the open-shelf detection of electric signal to electric signal, and the detection background error of pick-up unit is generally ± 5-10 rice.In international conference collection of thesis " IEEEAUTOTESTCON " " Automated Testing of A Laser Ranger " literary composition of nineteen eighty-three, introduced a kind of laser instrument automatic testing equipment that under laboratory condition, uses.This device is connected to form by analog laser transmitter, counter, amplifier, detector, Precision delayer and computing machine, this device can not detect the laser pulse ranging device of reality, can only carry out some breadboard laser analog tests and theoretical analysis etc.
Purpose of the present invention just provides a kind of three-in-one photoelectric coupler that uses on the pick-up unit of laser range finder, by the use of this photoelectrical coupler, can make pick-up unit that the many index of laser range finder is carried out the noncontact Non-Destructive Testing of not disintegrating.
The object of the present invention is achieved like this: photoelectrical coupler by clock-pulse generator and energy detector, can preset Precision delayer, burst pulse drive signal generator, light pulse generation emission coefficient and optical attenuator and join successively, but on the burst pulse drive signal generator, also be connected to the presetting pulse amplitude controller, but can preset Precision delayer and presetting pulse amplitude controller with the data command interface tap that computing machine joins.
The present invention can also realize like this: also include sampling holder in above-mentioned photoelectrical coupler, this sampling holder and clock-pulse generator and energy detector join, and join with the data command interface.
The present invention utilizes light emitting semiconductor device as the target simulation light source, obtain the range finding pulse synchronous signal of emulation testing by receiving tested instrument emitted laser, time-delay process with this signal enabling simulated target echo-pulse, and the delay parameter that presets according to main control system control loopback gives the intensity of analogue echo (light) pulse of tested instrument, thereby reaches the purpose of analog simulation range finding.The present invention utilizes the method for a plurality of simulated target echoes of emission in the single course of work to finish the test of indexs such as multiple goal gating and range resolution.
Technical essential of the present invention just is, with the laser energy of prior art detect, the emulation loopback of the extraction of pulse synchronous signal and target echo signal this three are combined into one, form a kind of photoelectric probe with circuit, light path and physical construction.This photoelectric probe and main control system are joined, can constitute the pick-up unit of a complete laser pulse ranging instrument.Because of the present invention succeeding in developing realized that the optical interface not damaged emulation of laser pulse ranging instrument detects.
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is a structured flowchart of the present invention, and wherein main frame of broken lines is this three-in-one photoelectric coupler, and the frame of broken lines in conjunction with the upper left corner joins is pick-up unit, and the little frame of broken lines that separate in the lower right corner is the measured laser tellurometer.
In the main frame of broken lines of Fig. 1, clock-pulse generator and energy detector 1, can preset Precision delayer 3, burst pulse drive signal generator 5, light pulse generation emission coefficient 6 and optical attenuator 7 and join successively, but on burst pulse drive signal generator 5, also be connected to presetting pulse amplitude controller 4, can preset the pulse height of Precision delayer 3 to 5 outputs of burst pulse drive signal generator in order to control.But data command interface 8 taps can preset Precision delayer 3 and presetting pulse amplitude controller 4.After connecting main control system 9, can preset test desired data (being the umber of pulse and the accurate dough softening etc.) by computing machine.Sampling holder 2 also joins with clock-pulse generator and energy detector 1, and can carry out exchanges data and information transmission by data command interface 8 and main control system 9.The laser emission optical system 10 of tested instrument and laser pick-off optical system 11 are joined with clock-pulse generator and energy detector 1 and optical attenuator 7 respectively.
Clock-pulse generator among the present invention and laser energy detecting device 1 be one and convert light pulse the photoelectric commutator of electric pulse to, and its response speed should be nanosecond, and energy measuring is at 0-50 milli Jiao Er.But presetting pulse amplitude controller 4 is a D/A change-over circuit, can preset the size of Precision delayer 3 to the pulse height of burst pulse drive signal generator 5 outputs by control, realizes the accurate adjustment to the subsequent optical pulse.Burst pulse drive signal generator 5 produces the pulse width of 10 nanoseconds.Light pulse generation emission coefficient 6 is one and converts electric pulse the electrical to optical converter of light pulse to, promptly receive electric pulse after, send light pulse earlier, utilize Liar to collimate again, send the directional light pulse.Optical attenuator 7 is made up of optical attenuator, and coarse adjustment is carried out in light pulse, to replenish the deficiency of electric driven amplitude range of adjustment.Data command interface 8 is combinations of an A/D converter and digital signal interface.
Circuit structure among the present invention all can adopt known custom circuit overlap joint, and the optical system among the present invention also all can be made up of known optical component.Have only clock-pulse generator and energy detector 1 and optical attenuator 7 be made for that distance is adjustable, inside be flexible coupling, version that can 360 ° of rotations, to be suitable for detection to various laser pulse ranging instrument.
Principle of compositionality of the present invention is that the laser emission optical system 10 emitted laser pulses of tested instrument are received by clock-pulse generator in this photoelectrical coupler and laser energy detecting device 1, and convert two kinds of electric signal that feature is different to.One tunnel electric response speed is fast, as the phototiming pulse, is sent to and can presets Precision delayer 3; The electric pulse output amplitude of another road electric signal is good with the light pulse linearity that receives, and is sent to sampling holder 2, after being sampled retainer 2 broadenings, delivers to main control system 9 through data command interface 8, can draw the energy datum of tested instrument emission laser.
Can preset the laser synchronization pulse startup that Precision delayer 3 is admitted to, begin the counting time-delay, after reaching main control system and setting in advance delay time in chronotron 3 according to test item, according to the instruction of main control system 9, to 5 outputs of burst pulse drive signal generator one, three or consecutive pulses control signal.Burst pulse drive signal generator 5 controlled light emitting semiconductor device output driving pulses in light pulse generation emission coefficient 6 make the light pulse of its emission specific characteristic.This light pulse is penetrated with parallel beam behind the Liar collimation of this emission coefficient 6 inside, becomes the target echo signal that imitation is returned by the specified distance of main control system 9 settings.Be to improve simulation precision, the optical wavelength of the light pulse of light pulse generation emission coefficient 6 emissions should be consistent with the used optical maser wavelength of tested instrument, is generally 1.06 microns, and pulsewidth is less than 50 nanoseconds.
After the simulation objectives echoed signal that receiving system 11 in the detected instrument is sent this three-in-one photoelectric coupler receives, can show corresponding data.The normal data of these data and main control system 9 demarcation is compared, can detect the quality of tested instrument correlation energy index.
The delay time and the single emulation that set in advance by main control system 9 detect the pulse number (i.e. the pulse control signal number of exporting to burst pulse drive signal generator 5) that produces, and distance accuracy, the gating that can detect tested instrument set indexs such as precision and blind area scope.The amplitude data that sets in advance to pulse height controller 4 by main control system 9, and the transmission power level that sampling holder 2 and data command interface 8 measure during in conjunction with tested instrument emission laser pulse, just can detect by indexs such as the emitted energy of test examination instrument, receiving sensitivities.
The present invention come down to a kind of by light to electricity, again by the brand-new detection mode of electricity to light, changed by electricity to electric traditional detection mode.Just can realize thus pick-up unit to the noncontact of tested instrument, do not disintegrate, Non-Destructive Testing.Have pick-up unit of the present invention and all greatly reduce, and all can use, and be not subjected to the restriction of weather condition in indoor and field than traditional detection device volume and weight.The detection background error reaches ± and 3 meters, accuracy of detection obviously improves.In addition, emission of the present invention, receiving axes distance and orientation are adjustable, and versatility is good, adapt to the detected object wide ranges; The simulated laser programed power control of emission is stablized adjustable, and spectrum is true to nature, and far and near various echo-pulses in can simulating, and full ranging precision is detected.Owing to can realize that laser energy detects, pulse synchronous signal extracts and the emulation loopback of target echo signal with machine, therefore can set many indexs such as precision, multiple goal resolution characteristic, distance accuracy and maximum measure distance ability to emitted energy, receiving sensitivity, blind area, the gating of tested instrument detects, and then be the tested instrument of comprehensive evaluation, provide fast, analyzed effectively, accurately data.
Claims (2)
1, a kind of three-in-one photoelectric coupler, it is characterized in that photoelectrical coupler by clock-pulse generator and energy detector (1), can preset Precision delayer (3), burst pulse drive signal generator (5), light pulse generation emission coefficient (6) and optical attenuator (7) formation of joining successively, can preset Precision delayer (3) with data command interface (8) tap that computing machine joins but and presetting pulse amplitude controller (4).
2, three-in-one photoelectric coupler according to claim 1 is characterized in that this photoelectrical coupler also includes sampling holder (2), and sampling holder (2) joins with data command interface (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01102264 CN1133071C (en) | 2001-01-20 | 2001-01-20 | Three-in-one photoelectric coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01102264 CN1133071C (en) | 2001-01-20 | 2001-01-20 | Three-in-one photoelectric coupler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1367375A CN1367375A (en) | 2002-09-04 |
| CN1133071C true CN1133071C (en) | 2003-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01102264 Expired - Fee Related CN1133071C (en) | 2001-01-20 | 2001-01-20 | Three-in-one photoelectric coupler |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397061C (en) * | 2005-12-19 | 2008-06-25 | 中国人民解放军总装备部军械技术研究所 | Multi-band pulse laser simulating emitter |
| CN104316172B (en) * | 2014-10-09 | 2016-09-21 | 中国科学院上海光学精密机械研究所 | Energy detection device for litho machine |
| CN111403995B (en) * | 2020-03-06 | 2021-08-17 | 上海机电工程研究所 | Large dynamic pulse laser emission peak power modulation method |
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| CN1367375A (en) | 2002-09-04 |
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