CN202101755U

CN202101755U - Three-dimensional laser motion attitude measurement system

Info

Publication number: CN202101755U
Application number: CN2011202319579U
Authority: CN
Inventors: 宋云峰; 叶岗; 朱传贵; 刘挺; 刘欢
Original assignee: SUZHOU SUNNY INSTRUMENTS SINGAPORE Pte Ltd
Current assignee: Yuyao Sunny Optical Intelligence Technology Co Ltd
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2012-01-04
Anticipated expiration: 2021-07-04

Abstract

The utility model discloses a three-dimensional laser motion attitude measurement system, which comprises an optical emitting system, an optical receiving system and a signal processing system, wherein the optical emitting system comprises a laser light source, a plurality of first light splitting components and first light-focusing components; the optical receiving system comprises a plurality of second light splitting components and second light-focusing components; the signal processing system comprises at least one photoelectric detector; the optical emitting system emits five beams of measuring lasers which fall on measuring points of a tested object at the same time, and the measuring lasers are reflected so as to form reflected beams; and after received and processed by the optical receiving system, the reflected beams are transmitted to the signal processing system so as to be processed to form electrical signals that can reflect the motion attitude of the tested object. The three-dimensional laser motion attitude measurement system can measure the three-dimensional motion attitude of the tested object instantaneously, and can achieve high measuring accuracy.

Description

Three-dimensional laser athletic posture measuring system

Technical field

The utility model relates to the laser measuring technique field, relates in particular to the system that three-dimensional laser Doppler is measured athletic posture.

Background technology

Laser doppler measurement technique is a kind of accurate contactless measuring technique; It is based on the Doppler frequency of measurement from the coherent laser light wave of body surface tiny area reflected back; And then the vibration velocity of definite this measuring point, and the vibration situation of body surface.The many structures in the engineering and the vibration of parts are three-dimensional; Be that any vibration (speed) of body surface can be broken down into component (Vx in two faces; Vy) and one from face component Vz, when carrying out the three-dimensional laser vibration survey, need to use three beams of laser irradiation measured point.As shown in Figure 1.In light path arrangement, light beam ZZ is used to measure Vz along Z-direction, thereby can get:

V _zx＝V _zcosθ+V _xsinθ (1)

V _zy＝V _zcosψ+V _ysinψ (2)

By (1) formula, (2) Shi Kede:

V _x＝(V _zx-V _zcosθ)/sinθ (3)

V _y＝(V _zy-V _zcosψ)/sinψ (4)

The most directly method by Doppler shift measurement speed is to utilize the scattered light of high-resolution spectrometer analysis from vibrating object.Because the vibration velocity of object reality is much littler than the light velocity; For example, when wavelength 1 is the speed of 6328 * 10-10 meter per second, vibrating object when being 10 meter per seconds, can obtain the maximal value of the Doppler shift of He-Ne laser; Calculate by (1-4); Can get D=31.6MHz D f, (be about 4.74 ' 1014Hz), i.e. DfD/f=6.67 ' 10-8 and the frequency f of laser itself is very high.

Therefore, it is impossible directly measuring Doppler frequency DfD.But when Doppler shift is enough big, can measure by means of high-resolution Fabry-Perot interferometer (Fabry-Perot).In the ordinary course of things, the caused Doppler shift of the vibration velocity of most of objects has exceeded the resolution of spectrometer at tens kilo hertzs-tens megahertzes.At this moment need measure by means of optics beat and reference light technology.

And for the vibration survey of component outward of object dimensional vibration plane, in traditional laser measuring technique, no matter be spot measurement or whole scanning survey, all only provide the structural vibration characteristic of object, and do not provided the whole three-dimensional vibrating characteristic of object.And for the technology of the three-dimensional laser Measuring Object vibration that occurs recent years; It mainly sends three light beams by three single-point laser vibration measuring instruments; Vibration with three directions of monitoring testee; The defective of right this measuring technique is to need many laser vibration measurers, and the parameter of measured reaction object moving state is not real-time, and it could obtain to put sometime the kinematic parameter of testee at three-dimensional after need calculating through projection.

The utility model content

The purpose of the utility model is to overcome the defective of prior art; A kind of novel three-dimensional micro-athletic posture measuring system and method are proposed; It can pass through a laser vibration measurer; Form five bundle measuring beams through processing such as beam splitter back and be transmitted on the testee, record vibration information and the athletic posture of testee in real time at three-dimensional.

For realizing above-mentioned purpose; The utility model proposes following technical scheme: a kind of three-dimensional laser athletic posture measuring system; Comprise optical emitting system, optical receiving system and signal processing system, said optical emitting system comprises LASER Light Source, the plural first component optical element and first group of collective optics; Said optical receiving system comprises the plural second group of collective optics and the second component optical element, and said signal processing system comprises at least one photodetector; Said optical emitting system launches plural number bundle Laser Measurement; Shine on the testee simultaneously; And reflect to form folded light beam by testee; Said folded light beam is sent to the electric signal that said signal processing system is processed into reflection testee athletic posture after optical receiving system receives processing.

Preferably, said measuring system also comprises a branch of reference beam of comparing with measuring beam.

Said signal processing system also comprises the charge coupled cell to the testee imaging.

Said measuring system also comprises the LED that illumination is provided.

Said plural number bundle Laser Measurement is five bundles.

Said five light beams are divided into three groups; Wherein two bundles are for measuring first group of light beam of testee directions X kinematic parameter; Two bundles also have a branch of for measuring the 3rd light beam of testee Z direction kinematic parameter for measuring second group of light beam of testee Y direction kinematic parameter.

Compared with prior art, three-dimensional laser athletic posture measuring system that the utility model provides and method can be measured the athletic posture of testee three-dimensional in real time, and range of dynamic measurement is wide, measuring accuracy is high.

Description of drawings

Fig. 1 is the light path principle figure of the utility model three-dimensional laser athletic posture measuring system and method;

Fig. 2 is the concrete light channel structure figure of the utility model;

Fig. 3 is the use block diagram of the utility model three-dimensional laser athletic posture measuring system and method.

Embodiment

To combine the accompanying drawing of the utility model below, the technical scheme in the utility model preferred embodiment will be carried out clear, complete description.

The three-dimensional laser athletic posture measuring system that the utility model proposes, it adopts three-dimensional Doppler vibration measurement with laser technology, can make multiple light beams survey the impact point on the testee simultaneously, and measures the athletic posture on X, Y, three directions of Z on the testee.

As shown in Figure 1; Said three-dimensional laser athletic posture measuring system comprises optical transmitting system, receiving optics and signal processing system; Said optical transmitting system comprises LASER Light Source 1, and the plural first component optical element, first group of collective optics, said optical receiving system comprise the second component optical element, second group of collective optics; Said signal processing system comprises photodetector 7 and CCD (charge coupled cell), and wherein LED is with thinking that measuring system provides illumination.

In the present embodiment; Photodetector 7 comprises first photodetector 71 and second photodetector 72, and wherein, first photodetector 71 is used to survey the light beam of testee movable information on directions X; And convert thereof into electric signal; Second photodetector 72 is used to survey the light beam of testee at Y and Z direction movable information, also converts thereof into electric signal, and CCD is used for testee is formed image.

During measurement; The laser that is sent by LASER Light Source 1 is after beam split, shift frequency, focusing and the transmission etc. of optical transmitting system are handled; Form five bundle measuring beams and shine simultaneously on the measurement point of testee 8, to measure the three-dimensional motion attitude of testee measurement point, measuring beam forms folded light beam by testee 8 reflection backs; Receiving optics receives folded light beam that reflect from testee, that carried testee measurement point three-dimensional vibrating signal; And, be sent to signal processing system, to obtain the photosignal and the image of the real-time reflection athletic posture of testee with after these processing such as light beams process transmission, focusing and beam split.

Specifically, as shown in Figure 2, the first component optical element of said optical emitting system comprises right-

angle prism

21,25; Amici

prism

22a, 22b, 22c; 26,27,28, beam split

shift frequency element

23a, 23b, 23c,

beam splitter

24a, 24b, 24c; And parallel tabula rasa 29; Said first group of concentrating element comprises

condenser lens

31,32 and object lens 33, and the said second component optical element comprises parallel tabula rasa 29, Amici

prism

41,42,43, and said second group of concentrating element comprises object lens 33,

condenser lens

51,52 and lens 53.

After said LASER Light Source 1 sends single beam laser; Through right-angle prism 21 turn to, behind the Amici

prism

22a, 22b, 22c beam split; The three beams measuring light that single beam laser is divided into X, Y, three directions of Z; Be divided into the fixed mode light of two bundles behind the measuring light process beam split shift frequency element 23a of directions X; And the generation frequency displacement, behind

beam splitter

24a, 24b, form two bundle directional light outputs, again through after

condenser lens

31,32 focusing and 29 transmissions of parallel tabula rasa; Focus optical beams to through object lens 33 on the measurement point of testee 8; The light beam that has carried testee directions X vibration information reflects to form folded light beam, after the focusing and Amici prism 41 beam split via the reflection of the transmission of the object lens in the receiving optics 33, optical flat 29,

condenser lens

51,52, on the beam Propagation of directions X first photodetector 71 in the signal processing system.

The measuring light of Y direction is divided into the fixed mode light of two bundles behind beam split shift frequency element 23b; And generation frequency displacement; The parallel output of two-beam behind beam splitter 24c; After right-angle prism 25 change beam directions, the reflection that reaches Amici prism 28,

condenser lens

31,32 focusing and 29 transmissions of parallel tabula rasa; Focus optical beams to through object lens 33 on the measurement point of testee 8; The light beam that has carried testee Y direction vibration information reflects to form folded light beam, folded light beam after the focusing and Amici

prism

41,42,43 beam split of the reflection of the transmission of object lens 33, optical flat 29,

condenser lens

51,52, with the beam Propagation of Y direction to second photodetector 72.

The measuring beam of Z direction is divided into the fixed mode light of two bundles behind beam split shift frequency element 23c; And generation frequency displacement; Be divided into reference beam and measuring beam to Z orientation measurement light through Amici prism 27; Measuring beam after Amici prism 28 changes the light path directions of propagation, focus on through

collector lens

31,32 and 29 transmissions of parallel tabula rasa after; Converge to light beam on the measurement point of testee 8 through object lens 33; The light beam that carries Z direction vibration information reflects to form folded light beam, folded light beam after the focusing and Amici

prism

condenser lens

51,52, with the beam Propagation of Z direction to second photodetector 72.

And after reference beam handles through turning to of right-

angle prism

61,62, Amici prism 63 etc.; Be sent to first photodetector 71 and second photodetector 72; With the measuring beam of X-direction, Y direction and Z-direction interfere etc. relatively handle after, and be translated into and reflected the electric signal of testee at the athletic posture of X-direction, Y direction and Z-direction.

And CCD forms image according to the measuring beam that reflects from testee to testee, and the image pixel of testee converts digital signal to.

Of Fig. 3; After the collection of the electric signal process data collecting card that signal processing system obtains and the analyzing and processing of DAS; The athletic posture information of testee measured point such as vibration velocity, displacement, acceleration etc. directly are presented on the image display, so that subsequent analysis processing.

Optical element shown in Fig. 2 of present embodiment is selected for use for explanation the utility model; In other embodiment of the utility model; Also can select other alternative optical elements for use; Also can be one or three like photodetector, photodetector is used for surveying simultaneously from three orientation measurement light of testee reflected back and reference light, and three photodetectors are used for surveying respectively the measuring light and the reference light of three directions of testee.

Technology contents of the utility model and technical characterictic have disclosed as above; Yet those of ordinary skill in the art still maybe be based on the teaching of the utility model and announcements and are done all replacement and modifications that does not deviate from the utility model spirit; Therefore; The utility model protection domain should be not limited to the content that embodiment discloses, and should comprise various replacement and the modifications that do not deviate from the utility model, and is contained by the present patent application claim.

Claims

1. three-dimensional laser athletic posture measuring system; It is characterized in that: comprise optical emitting system, optical receiving system and signal processing system; Said optical emitting system comprises LASER Light Source; The plural number first component optical element and first group of collective optics, said optical receiving system comprises the plural second group of collective optics and the second component optical element, said signal processing system comprises at least one photodetector; Said optical emitting system launches plural number bundle Laser Measurement; Shine simultaneously on the measurement point of testee; And reflect to form folded light beam by testee; Said folded light beam is sent to the electric signal that said signal processing system is processed into reflection testee athletic posture after optical receiving system receives processing.

2. three-dimensional laser athletic posture measuring system according to claim 1 is characterized in that: said measuring system also comprises a branch of reference beam of comparing with measuring beam.

3. three-dimensional laser athletic posture measuring system according to claim 1 and 2 is characterized in that: said signal processing system also comprises the charge coupled cell to the testee imaging.

4. three-dimensional laser athletic posture measuring system according to claim 1, it is characterized in that: said measuring system also comprises the LED that illumination is provided.

5. three-dimensional laser athletic posture measuring system according to claim 1 is characterized in that: said plural number bundle Laser Measurement is five bundles.

6. three-dimensional laser athletic posture measuring system according to claim 5; It is characterized in that: said five light beams are divided into three groups; Wherein two bundles are for measuring first group of light beam of testee directions X kinematic parameter; Two bundles also have a branch of for measuring the 3rd light beam of testee Z direction kinematic parameter for measuring second group of light beam of testee Y direction kinematic parameter.