CN104061862B - Remote displacement measurement system based on position sensor - Google Patents
Remote displacement measurement system based on position sensor Download PDFInfo
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- CN104061862B CN104061862B CN201410260569.1A CN201410260569A CN104061862B CN 104061862 B CN104061862 B CN 104061862B CN 201410260569 A CN201410260569 A CN 201410260569A CN 104061862 B CN104061862 B CN 104061862B
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Abstract
A kind of remote displacement measurement system based on position sensor, including part and the signal processing of looking in the distance, objective lens and eyepiece group therein form optical axis along lens focus, also include the first block prism, the second block prism, generating laser and PSD displacement transducers, the plane of incidence of the first block prism is vertical with the plane of incidence of the second block prism；The first transmission plane and the second transmission plane of first block prism, coaxial with the plane of incidence and fixed pan of the second block prism, the plane of incidence of the second block prism is relative with the second transmission plane of the first block prism；The first transmission plane and the second transmission plane of second block prism are coaxial with optical axis, first transmission plane of the second block prism is towards eyepiece group, the laser axis of generating laser and the plane of incidence coaxial line of the first block prism, PSD displacement transducers smooth surface are relative with the first transmission plane of the first block prism.So that measurement accuracy greatly improves, feedback signal is not easily affected by environmental factors.
Description
Technical field
The present invention relates to a kind of Signal Measurement System, more particularly to a kind of measurement system for distance displacement signal
System.
Background technology
It is a key operations during rocket launching to aim at alignment procedure, and its purposes is to pass through light before rocket launching
The normal direction of arrow upper mounting plate prism is adjusted on directive by electric auto-collimation mode, is ensured the initial orientation precision of rocket, is made fire
Arrow is before transmission in accurate direction of taking off.
Typically by installing photoemission receiving part additional on pointing instrumentation body, collimated light source uses red diodes, connect
Receive device and use phototriode.Aiming symbol amplifier is to being amplified processing from the photosignal received, finally with table
Head pointer form indicates the yawing moment and size of platform prism, and by collimated signal synchronous transfer to control system.
Usual pointing instrumentation uses theodolite telescope structure, including objective lens and eyepiece group, and light is formed along lens focus
Road optical axis, is generally provided with dividing plate on the outside of eyepiece group, observes the right-angle prism on the object to be measured of a distant place by pointing instrumentation, obtains
Light source feedback signal is obtained, by being contrasted with crosshair scale in division version, and the judgement to feedback signal luminous intensity, obtain remote
Whether side's object to be measured keeps the information of correct position.
Red diodes are protected from environmental larger in practical remote use and brightness is weak, it is not easy to find target and
Reflection light；Phototriode can only receive change of the light source from bright to dark, in order to realize that displacement measurement has to use two
Triode coordinates the mode of installation and debugging, so as to bring certain systematic error to sight device；In addition aiming symbol uses
Voltage system is transferred to control system, due to long cable transmission by load change have a great influence.
The content of the invention
It is an object of the invention to provide a kind of remote displacement measurement system based on position sensor, solves existing aiming
Optical signal detecting circuit detects the technical problem that accuracy is low, is easily disturbed by environmental factor to light signal fed back in instrument.
The remote displacement measurement system based on position sensor of the present invention, including telescopic system, objective lens therein
With eyepiece group optical axis, in addition to the first block prism, the second block prism, generating laser and PSD positions are formed along lens focus
Displacement sensor, the plane of incidence of the first block prism are vertical with the plane of incidence of the second block prism；The first of first block prism is saturating
Penetrate face and the second transmission plane, it is coaxial with the plane of incidence and fixed pan of the second block prism, the plane of incidence of the second block prism with
Second transmission plane of the first block prism is relative；The first transmission plane and the second transmission plane of second block prism are coaxial with optical axis,
First transmission plane of the second block prism is towards eyepiece group, the laser axis of generating laser and the plane of incidence of the first block prism
Coaxial line, PSD displacement transducers smooth surface are relative with the first transmission plane of the first block prism.
One optical filtering is respectively set on the outside of the first transmission plane of first block prism and the second transmission plane, in optical filtering
One lens is set between the second block prism, and each optical filtering, lens are coaxial with the first block prism and the second block prism
Line.
The PSD displacement transducers are two signal output parts, and each signal output part of PSD displacement transducers is suitable respectively
Sequence connects a signal acquisition circuit, a signal filter circuit and a rectification circuit, the electric current output of two rectification circuits
End connects a signal input part of differential amplifier circuit, the signal output part connection constant-current source driving of differential amplifier circuit respectively
The signal input part of circuit, one end of the signal output part connection long range signals cable of constant current source driving circuit, wherein：
Signal acquisition circuit, for gathering the μ A weak signals of a signal output part, filter high-frequency harmonics composition, by weak letter
Number it is enlarged into mA signals；
Signal filter circuit, for shielding medium-frequency harmonic composition, obtain the change in displacement voltage signal of low frequency band；
Rectification circuit, for change in displacement voltage signal to be converted to the d. c. voltage signal of change in displacement；
Differential amplifier circuit, for being amplified to the two-way difference mode signal of access, revise signal error, formed accurate
Displacement voltage signal；
Constant current source driving circuit, gram that the voltage signal for the displacement voltage signal of input to be switched to respective change controls
Take the stable signal source output of transfer impedance.
The constant current source driving circuit includes resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance
R27, resistance R28, the 8th operational amplifier U08, the 9th operational amplifier U09 and the tenth operational amplifier U10, input signal connect
The 8th operational amplifier U08 inverting input is connect, the 8th operational amplifier U08 in-phase input end, which connects, simulates ground, and the 9th
Operational amplifier U09 in-phase input end connection simulation ground, connects between the 8th operational amplifier U08 inverting input and output end
Resistance R24, the 8th operational amplifier are connected between connecting resistance R22, the 9th operational amplifier U09 inverting input and output end
The 9th operational amplifier U09 inverting input is connected after U08 output end series resistance R23, the 9th operational amplifier U09's
The tenth operational amplifier U10 inverting input is connected after output end series resistance R25, the tenth operational amplifier U10's is anti-phase
Between input and output end resistance is connected between connection resistance R26, the tenth operational amplifier U10 in-phase input end and output end
Output control signal after R27, the tenth operational amplifier U10 output end series resistance R27, the tenth operational amplifier U10's is defeated
Connection simulates ground after going out to hold sequential series resistance R27, resistance R28.
Remote displacement measurement system of the invention based on position sensor is by the not accurate enough of several phototriodes
Brightness measure of the change action displacement signal, be converted to using PSD sensors intrinsic physics p-n nodal potentials reacting condition displacement letter
Number so that measurement accuracy is greatly improved, and feedback signal is not easily affected by environmental factors, and possesses the ability used in complex working condition
And reliability improves；Semiconductor laser and PSD use reduce the complexity of structure installation, the installation and debugging process of equipment
It is simple and workable.
Embodiments of the invention are described further below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the light source feedback structural representation of the remote displacement measurement system of the invention based on position sensor；
Fig. 2 is the signal processing structure schematic diagram of the remote displacement measurement system of the invention based on position sensor；
Fig. 3 is the output signal driving structure signal of the remote displacement measurement system of the invention based on position sensor
Figure.
Embodiment
It is rectangle that the present embodiment, which uses block prism horizontal cross-section, a fixed pan of block prism in the present embodiment
It is arranged on pedestal, the first transmission plane, the plane of incidence and the second transmission is followed successively by along other three planes being sequentially connected clockwise
Face.
As shown in figure 1, embodiment includes looking in the distance (mirror) part, objective lens 16 and eyepiece group 17 therein are along lens focus structure
Into optical axis, in addition to the first block prism 11, the second block prism 12, generating laser 15 and PSD displacement transducers 01, first
The plane of incidence 11b of block prism 11 is vertical with the plane of incidence 12b of the second block prism 12；First transmission of the first block prism 11
Face 11a and the second transmission plane 11c, second block prism 12 coaxial with the plane of incidence 12b and fixed pan of the second block prism 12
Plane of incidence 12b it is relative with the second transmission plane 11c of the first block prism 11；First transmission plane 12a of the second block prism 12
Coaxial with optical axis with the second transmission plane 12c, the first transmission plane 12a of the second block prism 12 is towards eyepiece group 17；
One optical filtering 13 is respectively set on the outside of the first transmission plane and the second transmission plane of the first block prism 11, filtered
One lens 14 is set between the block prism 12 of mirror 13 and second, and each optical filtering, lens and the first block prism 11 and second are vertical
The coaxial line of square glass prism 12；
The plane of incidence coaxial line of the laser axis of generating laser 15 and the first block prism 11, PSD displacement transducers 01
Smooth surface is relative with the first transmission plane 11a of the first block prism 11.
In practical application, the laser launched using generating laser 15 irradiates the plane of incidence 11b of the first block prism 11, swashs
Then second transmission plane 11c of the anaclasis through the first block prism 11 is reflected again to the plane of incidence 12b of the second block prism 12
The second transmission plane 12c directives objective lens 16 through the second block prism 12, form the laser light coaxial with telescopic system optical axis
Beam；
When telescope focuses objective focal length to infinity, the parallel laser light beam launched from object lens mouth is irradiated to right angle
Back reflection on prism, first transmission plane 12a and second transmission plane 12c irradiation eyepiece group of the reflected light through the second block prism 12,
It is imaged on the graticle 18 on the outside of eyepiece, when luminous point and eyepiece crosshair of focusing or so overlap, that is, realizes laser light
The optical axis of electric pointing instrumentation and the collimation of right-angle prism；
Reflected light can internally occur reflecting the plane of incidence 12b from the second block prism 12 through the second block prism 12 simultaneously
Project, the second projection surface 11c and the first transmission plane 11a through the first block prism 11 be radiated at PSD displacement transducers 01 by
In smooth surface, output include the analog signal of displacement information, and PSD outputs analog signal is handled, formed have directionality with
The indication signal of magnitude.
As shown in Fig. 2 the PSD displacement transducers 01 of signal processing are the photoelectricity of two signal output parts in the present embodiment
Conversion signal source, each signal output parts of PSD displacement transducers 01 are linked in sequence a signal acquisition circuit 02 (figure respectively
01 to a few arrow on the left side 02 on 2), a signal filter circuit 03 and a rectification circuit 04, two rectification circuits 04
Current output terminal connects a signal input part of differential amplifier circuit 05 respectively, and the signal output part of differential amplifier circuit 05 connects
Connect the signal input part of constant current source driving circuit 06, the signal output part connection long range signals cable of constant current source driving circuit 06
One end, wherein：
Signal acquisition circuit 02, for gathering the μ A weak signals of a signal output part, filter high-frequency harmonics composition will be weak
Signal is enlarged into mA signals；
Signal filter circuit 03, for shielding medium-frequency harmonic composition, obtain the change in displacement voltage signal of low frequency band；
Rectification circuit 04, for change in displacement voltage signal to be converted to the d. c. voltage signal of change in displacement；
Differential amplifier circuit 05, for being amplified to the two-way difference mode signal of access, revise signal error, formed accurate
Displacement voltage signal；
Constant current source driving circuit 06, what the voltage signal for the displacement voltage signal of input to be switched to respective change controlled
Overcome the stable signal source output of transfer impedance.
The μ A levels weak signal that the present embodiment is sent to PSD carries out one-level amplification, filtering and I/V conversion；Filtered using band logical
Wave circuit, light source intrinsic frequency signal is received, suppress the influence of power frequency and veiling glare；Nearly sine wave after being filtered using rectification circuit
Signal is converted to d. c. voltage signal；Subtraction function is realized using differential amplifier circuit, for specifying for signal output and direction；
Using constant-current source circuit so that signal output current is not influenceed by long range cable impedance variations.
As shown in figure 3, the constant current source driving circuit of the present embodiment uses FX747 chips, including resistance R22, resistance R23,
Resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, rheostat RP2, the 8th operational amplifier U08, the 9th computing
Amplifier U09 and the tenth operational amplifier U10, input signal connect the 8th operational amplifier U08 inverting input, the 8th fortune
Amplifier U08 in-phase input end connection simulation ground is calculated, the 9th operational amplifier U09 in-phase input end connects simulation ground, the
Resistance R22, the 9th operational amplifier U09 anti-phase input are connected between eight operational amplifier U08 inverting input and output end
The 9th computing of connection is put after resistance R24, the 8th operational amplifier U08 output end series resistance R23 are connected between end and output end
Big device U09 inverting input, the tenth operational amplifier is connected after the 9th operational amplifier U09 output end series resistance R25
U10 inverting input, connects resistance R26 between the tenth operational amplifier U10 inverting input and output end, the tenth computing is put
Resistance R27, the tenth operational amplifier U10 output end series resistance R27 are connected between big device U10 in-phase input end and output end
Output control signal afterwards, connection simulation ground after the tenth operational amplifier U10 output end sequential series resistance R27, resistance R28,
Pin 13 (u09, u10 have drawn 2 pins 13 on figure), the pin 9 of LM747 chips connect positive power supply VCC, LM747 chips
Pin 4 (u09, u10 have drawn 2 pins 4 on figure) a branch road connection reverse electrical source VEE, another branch road connection rheostat RP2
Sliding end, rheostat RP2 is connected between the pin 3 of LM747 chips and pin 14.
The output current intensity of the present embodiment is unrelated with signal line load, so as to realize that voltage-controlled current source is changed.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (2)
1. a kind of remote displacement measurement system based on position sensor, including telescope, objective lens (16) therein and mesh
Microscope group (17) forms optical axis along lens focus, it is characterised in that：Also include the first block prism (11), the second block prism
(12), generating laser (15) and PSD displacement transducers (01), the plane of incidence (11b) of the first block prism (11) are vertical with second
The plane of incidence (12b) of square glass prism (12) is vertical；The first transmission plane (11a) of first block prism (11) and the second transmission plane
(11c), the plane of incidence of second block prism (12) coaxial with the plane of incidence (12b) and fixed pan of the second block prism (12)
(12b) is relative with the second transmission plane (11c) of the first block prism (11)；First transmission plane of the second block prism (12)
(12a) and the second transmission plane (12c) are coaxial with optical axis, and the first transmission plane (12a) of the second block prism (12) is towards eyepiece group
(17), the plane of incidence coaxial line of the laser axis of generating laser (15) and the first block prism (11), PSD displacement transducers
(01) the first transmission plane (11a) of smooth surface and the first block prism (11) is relative；
One optical filtering (13) is respectively set on the outside of the first transmission plane of first block prism (11) and the second transmission plane, filtered
One lens (14), each optical filtering, lens and the first block prism are set between light microscopic (13) and the second block prism (12)
And the second block prism (12) coaxial line (11)；
The PSD displacement transducers (01) are two signal output parts, and each signal output part of PSD displacement transducers (01) divides
Be not linked in sequence a signal acquisition circuit (02), and a signal filter circuit (03) and a rectification circuit (04), two whole
The current output terminal of current circuit (04) connects a signal input part of differential amplifier circuit (05), differential amplifier circuit respectively
(05) signal input part of signal output part connection constant current source driving circuit (06), the signal of constant current source driving circuit (06) are defeated
Go out one end of end connection long range signals cable, wherein：
Signal acquisition circuit (02), for gathering the μ A weak signals of a signal output part, filter high-frequency harmonics composition, by weak letter
Number it is enlarged into mA signals；
Signal filter circuit (03), for shielding medium-frequency harmonic composition, obtain the change in displacement voltage signal of low frequency band；
Rectification circuit (04), for change in displacement voltage signal to be converted to the d. c. voltage signal of change in displacement；
Differential amplifier circuit (05), for being amplified to the two-way difference mode signal of access, revise signal error, formed accurate
Displacement voltage signal；
Constant current source driving circuit (06), gram that the voltage signal for the displacement voltage signal of input to be switched to respective change controls
Take the stable signal source output of transfer impedance.
2. the remote displacement measurement system according to claim 1 based on position sensor, it is characterised in that：The perseverance
Flowing source driving circuit includes resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, the 8th
Operational amplifier U08, the 9th operational amplifier U09 and the tenth operational amplifier U10, input signal connect the 8th operational amplifier
U08 inverting input, the 8th operational amplifier U08 in-phase input end connection simulation ground, the 9th operational amplifier U09's is same
Phase input connection simulation ground, connects resistance R22, the 9th fortune between the 8th operational amplifier U08 inverting input and output end
Calculate and resistance R24, the 8th operational amplifier U08 output end series electrical are connected between amplifier U09 inverting input and output end
The 9th operational amplifier U09 inverting input, the 9th operational amplifier U09 output end series resistance R25 are connected after resistance R23
The tenth operational amplifier U10 inverting input is connected afterwards, is connected between the tenth operational amplifier U10 inverting input and output end
Resistance R27, the tenth operational amplifier are connected between connecting resistance R26, the tenth operational amplifier U10 in-phase input end and output end
Output control signal after U10 output end series resistance R27, the tenth operational amplifier U10 output end sequential series resistance
Connection simulation ground after R27, resistance R28.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410260569.1A CN104061862B (en) | 2014-06-12 | 2014-06-12 | Remote displacement measurement system based on position sensor |
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|---|---|---|---|
| CN201410260569.1A CN104061862B (en) | 2014-06-12 | 2014-06-12 | Remote displacement measurement system based on position sensor |
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| CN104061862B true CN104061862B (en) | 2017-12-12 |
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| CN105241481B (en) * | 2015-10-08 | 2017-08-25 | 许继电源有限公司 | A kind of laser detector and its prism fixing device |
| CN111094892B (en) * | 2017-09-26 | 2022-06-24 | 天宝公司 | Data collection task queue for a surveying instrument |
| CN108414052A (en) * | 2018-03-09 | 2018-08-17 | 上海华测创时测控科技有限公司 | Level meter based on infrared laser |
| CN113884040B (en) * | 2021-09-24 | 2023-10-10 | 东莞市诺丽科技股份有限公司 | Train wheel tread detection system and detection method based on displacement sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2943498B2 (en) * | 1992-04-22 | 1999-08-30 | 日本電気株式会社 | Scanning laser displacement meter |
| JPH07134006A (en) * | 1993-11-11 | 1995-05-23 | Fanuc Ltd | Laser displacement sensor device |
-
2014
- 2014-06-12 CN CN201410260569.1A patent/CN104061862B/en active Active
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| PSD高精度位置测量系统的研究与设计;裴先登;《华中科技大学学报》;20040229;第32卷(第2期);全文 * |
| 半导体激光经纬仪光电自准直测角当量的标定;李庆辉等;《光电工程》;19991231;第26卷(第6期);第1部分第1段，附图1 * |
| 基于PSD的激光位移传感器的研制;莫仁芸;《中国优秀硕士学位论文全文数据库信息科技辑》;20120715;24页第3.3节PSD信号处理电路实现，第1段，第25页，附图3.6 * |
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