CN109387824A - A kind of laser range finder transmitting-receiving plain shaft parallelism measurement method - Google Patents

A kind of laser range finder transmitting-receiving plain shaft parallelism measurement method Download PDF

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Publication number
CN109387824A
CN109387824A CN201811356337.0A CN201811356337A CN109387824A CN 109387824 A CN109387824 A CN 109387824A CN 201811356337 A CN201811356337 A CN 201811356337A CN 109387824 A CN109387824 A CN 109387824A
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CN
China
Prior art keywords
range finder
laser range
laser
prism
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811356337.0A
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Chinese (zh)
Inventor
李成杰
张玉成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luoyang Institute of Electro Optical Equipment AVIC
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Luoyang Institute of Electro Optical Equipment AVIC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Luoyang Institute of Electro Optical Equipment AVIC filed Critical Luoyang Institute of Electro Optical Equipment AVIC
Priority to CN201811356337.0A priority Critical patent/CN109387824A/en
Publication of CN109387824A publication Critical patent/CN109387824A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/497Means for monitoring or calibrating
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/26Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes

Abstract

The present invention provides a kind of laser range finders to receive and dispatch plain shaft parallelism measurement method, it is installed on laser range finder with 4 quadrant detector replacement range detector, receiving optics is returned in parallel using the laser that prism of corner cube emits range finder, it realizes laser " internal loopback ", the angle information of 4 quadrant detector output reflects the collimation of transmitting-receiving optical axis.The present invention makes the operation of laser range finder transmitting-receiving plain shaft parallelism measurement become simple and convenient, does not need the operations such as complicated optical path alignment, greatly improves the adjustment efficiency of laser range finder;Measurement method of the present invention does not need complicated hardware device yet, therefore hardware cost is lower, and the mini laser rangefinder for system of taking aim at is seen especially suitable for no visible light.

Description

A kind of laser range finder transmitting-receiving plain shaft parallelism measurement method
Technical field
The present invention relates to field of optical detection, it is related to being a kind of utilization laser range finder measurement method.
Background technique
Laser range finder is suffered from and is widely applied in military and civil field, is current high-precision, remote ranging neck The ideal instrument in domain.Laser range finder is generally by laser, optical transmitting system, receiving optics, range detector, power supply And the composition such as signal processing circuit component.Its working principle is that: the emitted optical system of laser of laser transmitting narrows diverging It is emitted, is irradiated on measured target behind angle, the laser of measured target reflection converges in range detector by receiving optics On, echo-signal is generated, signal processing circuit is amplified and handled to echo-signal, obtains range information.
(referred to as transmitting-receiving optical axis is parallel with the collimation of receiving optics optical axis for laser range finder optical transmitting system optical axis Property) be range finder key technical index, directly affect the range performance of laser range finder, laser range finder is flat to transmitting-receiving optical axis The requirement of row is very high (rad grade).The high-acruracy survey of range finder transmitting-receiving plain shaft parallelism is to realize transmitting-receiving plain shaft parallelism tune The basis of examination is the key technology of laser range finder adjustment.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of high-precision measuring method for receiving and dispatching light axis consistency. The technical solution of the invention is as follows, is installed on laser range finder with 4 quadrant detector replacement range detector, utilizes angle The laser that cone prism emits range finder returns to receiving optics in parallel, realizes laser " internal loopback ", Quadrant detector The angle information of device output reflects the collimation of transmitting-receiving optical axis.
The specific measuring process of the technical solution adopted by the present invention to solve the technical problems is as follows:
Step 1: removing the range detector of laser range finder, 4 quadrant detector is installed on laser range finder, pacify Holding position is the installation site of the range detector that removes in laser range finder;
Step 2: prism of corner cube being placed in front of laser range finder, the angle for adjusting prism of corner cube makes prism of corner cube optical axis Parallel with laser range finder optical axis, adjustment prism of corner cube position makes prism of corner cube light passing region include that laser range finder emits optics Attenuator is placed into laser range finder optical transmitting system and pyramid by system clear aperature and receiving optics clear aperature Between prism;
Step 3: laser range finder and Quadrant detector device assembly power on, and laser range finder passes through debugging cable and host computer Connection;
Step 4: laser beam being emitted with repetition rate by PC control laser range finder, the repetition rate is four Within the scope of the look-in frequency of quadrant detection device assembly;
Step 5: reading angles of display information on Quadrant detector device assembly display module, the angle information is tested The transmitting-receiving plain shaft parallelism error of laser range finder.
The Quadrant detector device assembly and range detector structure interface having the same and structure precision.
The beneficial effects of the present invention are the operations for measuring laser range finder transmitting-receiving plain shaft parallelism to become simple and convenient, The operations such as complicated optical path alignment are not needed, the adjustment efficiency of laser range finder is greatly improved;Measurement side of the present invention Method does not need complicated hardware device yet, therefore hardware cost is lower, takes aim at the small-sized of system especially suitable for the sight of no visible light Laser range finder.
Detailed description of the invention
Fig. 1 is light path schematic diagram of the invention;
Wherein, 1- laser range finder, 2- laser, 3- optical transmitting system, 4- attenuator, 5- prism of corner cube, 6- are received Optical system, 7- Quadrant detector device assembly.
Fig. 2 is Quadrant detector device assembly composition schematic diagram of the present invention;
Wherein, 8- structural member, 9- signal processing circuit, 10- display module, 11- cable, 12- 4 quadrant detector.
Fig. 3 is measurement flow chart of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Step 1: removing the range detector of laser range finder, 4 quadrant detector is installed on laser range finder, pacify Holding position is the installation site of the range detector that removes in laser range finder;
Step 2: prism of corner cube being placed in front of laser range finder, the angle for adjusting prism of corner cube makes prism of corner cube optical axis Parallel with laser range finder optical axis, adjustment prism of corner cube position makes prism of corner cube light passing region include that laser range finder emits optics Attenuator is placed into laser range finder optical transmitting system and pyramid by system clear aperature and receiving optics clear aperature Between prism;
Step 3: laser range finder and Quadrant detector device assembly power on, and laser range finder passes through debugging cable and host computer Connection;
Step 4: laser beam being emitted with repetition rate by PC control laser range finder, the repetition rate is four Within the scope of the look-in frequency of quadrant detection device assembly;
Step 5: reading angles of display information on Quadrant detector device assembly display module, the angle information is tested The transmitting-receiving plain shaft parallelism error of laser range finder.
Quadrant detector device assembly of the invention is by 4 quadrant detector, structural member, signal processing circuit and display Module composition.Wherein the range detector in structural member and laser range finder to be tested possesses identical structure interface;Four-quadrant Detector photosensitive region diameter should be greater than the 2 times or more of range detector photosensitive region diameter, to guarantee that receiving and dispatching optical axis puts down The measurement range of row;4 quadrant detector photosurface center and the center of structural member are concentric by the guarantee of optical centering method.
4 quadrant detector signal processing circuit is used to complete the amplification and processing of 4 quadrant detector output signal. In test process, signal amplification circuit can be according to the amplitude and measured laser of four quadrant output signals of 4 quadrant detector An angle information is calculated in the focal length of range finder receiving optics, which is the receipts of measured laser range finder The consistent sexual deviation of light-emitting axis;The angle information is shown that operator passes through by signal processing circuit by display module Display module can reading angular information.
4 quadrant detector signal processing circuit is for completing signal amplification, signal processing and display function.Four-quadrant is visited It surveys device signal processing circuit and method is carried out to the signal that 4 quadrant detector exports, the signal value exported according to 4 quadrant detector Misalignment angle information is calculated with range finder receiving optics parameter, is shown misalignment angle information in real time by display module It shows and.
The laser beam that prism of corner cube is used to emit laser range finder is turned back, the laser for emitting laser range finder Light beam can enter laser pick-off optical system along the direction parallel with optical transmitting system optical axis.The choosing of prism of corner cube clear aperature Selecting, which should ensure that wrap simultaneously, expands laser range finder optical transmitting system clear aperature and laser pick-off optical system clear aperature.
The laser beam that attenuator is used to emit laser range finder is decayed, and 4 quadrant detector is protected not swashed by force The operation wavelength of light injury, attenuator should be consistent with the operation wavelength of laser range finder, and clear aperature is slightly larger than laser range finder Optical transmitting system clear aperature.
Measurement method of the invention includes following five steps: (1) range detector is removed, by Quadrant detector device assembly It is installed on laser range finder;(2) optical path is built;(3) laser range finder powers on and Quadrant detector device assembly powers on; (4) control laser range finder emits laser beam;(5) angle information of 4 quadrant detector output is read, which is To receive and dispatch plain shaft parallelism error.
Heretofore described Quadrant detector device assembly needs to be customized according to tested laser range finder.Four-quadrant Limiting detector assembly includes 4 quadrant detector, structural member, signal processing circuit and display module group.4 quadrant detector Mature commercial model can be selected, structural member is designed according to according to the structure interface of laser range finder, is detected with ranging The structure interface of device is consistent, and is adjusted 4 quadrant detector photosurface center and structural member center by optical centering means To coincidence;Signal amplification, processing circuit are customized according to 4 quadrant detector and tested laser range finder, and signal is put Greatly, the signal enlargement ratio of processing circuit is codetermined by laser range finder transmission power and the responsiveness of 4 quadrant detector, The ripe algorithm in related teaching material and document, that is, implementable can be selected in misalignment angle computational algorithm.
Prism of corner cube of the present invention can select mature goods shelf products or process by producer.
Attenuator of the invention can select mature goods shelf products.
The present invention can measure to obtain the parallelism error of transmitting-receiving optical axis according to following measuring process: (1) removing ranging and visit Device is surveyed, 4 quadrant detector is installed on laser range finder;(2) optical path is built;(3) range finder powers on, four-quadrant is visited Device assembly is surveyed to power on;(4) control range finder emits laser beam;(5) angle information of 4 quadrant detector output, the angle are read Spending information is to receive and dispatch plain shaft parallelism error.

Claims (2)

1. a kind of laser range finder receives and dispatches plain shaft parallelism measurement method, it is characterised in that:
Step 1: the range detector of laser range finder is removed, 4 quadrant detector is installed on laser range finder, installation position The range detector that removes is set in the installation site of laser range finder;
Step 2: prism of corner cube being placed in front of laser range finder, the angle for adjusting prism of corner cube makes prism of corner cube optical axis and swashs Ligh-ranging machine optical axis is parallel, and adjustment prism of corner cube position makes prism of corner cube light passing region include laser range finder optical transmitting system Attenuator is placed into laser range finder optical transmitting system and prism of corner cube by clear aperature and receiving optics clear aperature Between;
Step 3: laser range finder and Quadrant detector device assembly power on, and laser range finder is connected by debugging cable and host computer It connects;
Step 4: laser beam being emitted with repetition rate by PC control laser range finder, the repetition rate is in four-quadrant Within the scope of the look-in frequency of detector assembly;
Step 5: reading angles of display information on Quadrant detector device assembly display module, the angle information is measured laser The transmitting-receiving plain shaft parallelism error of range finder.
2. a kind of laser range finder according to claim 1 receives and dispatches plain shaft parallelism measurement method, it is characterised in that:
The Quadrant detector device assembly and range detector structure interface having the same and structure precision.
CN201811356337.0A 2018-11-15 2018-11-15 A kind of laser range finder transmitting-receiving plain shaft parallelism measurement method Pending CN109387824A (en)

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CN201811356337.0A CN109387824A (en) 2018-11-15 2018-11-15 A kind of laser range finder transmitting-receiving plain shaft parallelism measurement method

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CN110045352A (en) * 2019-04-03 2019-07-23 北京科航理达技术有限公司 A kind of method and optical system of arranged in dislocation optical system
CN110763437A (en) * 2019-10-16 2020-02-07 中国航空工业集团公司洛阳电光设备研究所 Method for detecting optical axis of photoelectric product by using monitoring mirror
CN111473747A (en) * 2020-04-15 2020-07-31 Oppo广东移动通信有限公司 Calibration device, calibration system, electronic device and calibration method
CN113744349A (en) * 2021-08-31 2021-12-03 湖南航天远望科技有限公司 Infrared spectrum image measurement alignment method, device and medium

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Publication number Priority date Publication date Assignee Title
CN110045352A (en) * 2019-04-03 2019-07-23 北京科航理达技术有限公司 A kind of method and optical system of arranged in dislocation optical system
CN110045352B (en) * 2019-04-03 2020-12-18 北京科航理达技术有限公司 Method for mounting optical system in dislocation mode and optical system
CN110763437A (en) * 2019-10-16 2020-02-07 中国航空工业集团公司洛阳电光设备研究所 Method for detecting optical axis of photoelectric product by using monitoring mirror
CN111473747A (en) * 2020-04-15 2020-07-31 Oppo广东移动通信有限公司 Calibration device, calibration system, electronic device and calibration method
WO2021208582A1 (en) * 2020-04-15 2021-10-21 Oppo广东移动通信有限公司 Calibration apparatus, calibration system, electronic device and calibration method
CN111473747B (en) * 2020-04-15 2022-07-26 Oppo广东移动通信有限公司 Calibration device, calibration system, electronic device and calibration method
TWI799817B (en) * 2020-04-15 2023-04-21 大陸商Oppo廣東移動通信有限公司 Calibration device, calibration system, electronic equipment and calibration method
CN113744349A (en) * 2021-08-31 2021-12-03 湖南航天远望科技有限公司 Infrared spectrum image measurement alignment method, device and medium

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Application publication date: 20190226