CN108646047A - Based on tachogenerator of the Doppler effect with correcting principle and calibration and measurement method - Google Patents
Based on tachogenerator of the Doppler effect with correcting principle and calibration and measurement method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
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Abstract
The present invention relates to based on tachogenerator of the Doppler effect with correcting principle and calibration and measurement method, the tachogenerator includes laser and laser beam：Laser emits laser beam, laser beam is incident to three corner reflectors, spectroscope receives the laser beam of three corner reflectors reflection and is classified as laser beam one and laser beam two, the laser beam one reflexes to prism, photodetector one receives the laser beam one through refraction by prism and injection, and its incoming position is measured, while photodetector two receives the laser beam two, and measure its incoming position.The present invention passes through Doppler effect：Refer to the wavelength of object radiation and generates variation because of the relative motion of light source and observer, prism is different to the laser refraction angle of different wave length simultaneously, pass through the variation of the incoming position on photodetector of laser beam one, to calculate the speed of testee, while the incoming position for receiving according to photodetector two laser beam two makes amendment to the speed of testee.
Description
Technical field
The present invention relates to field of measuring technique, and in particular to a kind of sensing that tests the speed with correcting principle based on Doppler effect
Device and calibration and measurement method.
Background technology
In recent years, with the appearance of semiconductor laser and photodetector so that laser triangulation is possibly realized
And it is able to extensive use.Laser triangulation is to rely on triangular wave optical device and high-precision PSD (Position
Sensitive Device, position sensitive (sensitivity) detector), when object has carried out small size operation, by optical triangulation into
Row amplification, level run amplify distance on photodetector (PSD), to realize high-precision movement or speed in a small range
Degree measures.Doppler effect is wave source and when observer has relative motion, and observer receives the frequency of wave and wave source is sent out
Therefore frequency and different phenomenon can carry out speed (size) using Doppler effect and measure.However speed is vector,
Tachogenerator on the market can not be corrected in calculating speed because the direction of motion of object makes itself light path generate at present
Deviation so that testee velocity magnitude calculating there is error.
Invention content
It is an object of the invention to propose it is a kind of based on tachogenerator of the Doppler effect with correcting principle and calibration with
Measurement method.
To achieve the goals above, the present invention provides following technical scheme：
It is a kind of based on tachogenerator of the Doppler effect with correcting principle, including：
Laser, for launching laser beam；
The laser beam is incident to first reflecting surface of three corner reflectors, is incident to after the first reflective surface
Second reflecting surface；
Spectroscope, the laser beam for receiving the second reflective surface, and laser beam is divided into laser beam one and laser beam
Two；
The laser beam one, is incident to prism；
The prism for making incident laser beam one reflect, and transmits away；
Photodetector one for receiving the laser beam one transmitted from the prism, and measures its incoming position；
Photodetector two for receiving the laser beam two transmitted from the spectroscope, and measures its incoming position；
Processing system, incoming position variable quantity, the photoelectricity of the laser beam one for being received according to photodetector one are visited
The incoming position variable quantity for surveying the laser beam two that device two receives during the motion, calculates the speed of testee.
In further embodiment, three corner reflector is attached on testee, and three corner reflectors are with measured object
The movement of body and move.By the way that directly three corner reflectors are fixed on testee, wave source can be reached and observer is opposite
The purpose that position changes, and realize that reflection laser is moved synchronously with moving for testee.
In further embodiment, the first reflecting surface of three corner reflector and the angle of the second reflecting surface are right angle.
When the angle of first reflecting surface and the second reflecting surface is right angle, it is incident to the incident ray of the first reflecting surface and from the second reflecting surface
The light ray parallel of outgoing makes overall structure minimize as far as possible, is also convenient in quilt to be conducive to the arrangement of each component in system
The speed for surveying object calculates.
In further embodiment, the material of the prism is photonic crystal.Photonic crystal can reduce the dispersion of light with
It is weak.
In further embodiment, the prism includes prism facets one and prism facets two, described to be projected through spectroscope point
Laser beam one is incident to the prism facets one of prism, and reflects, when the laser beam one after reflecting is incident to prism facets two,
Prism facets two are so that laser beam one reflects again, and laser beam one is made to be projected from prism facets two.
In further embodiment, the prism facets one connect with prism facets two, and angle is acute angle.
In further embodiment, the receiving plane of photodetector one and the second reflective surface through three corner reflectors
Laser beam is parallel, and the receiving plane of photodetector two is vertical with through the laser beam of the second reflective surface of three corner reflectors.
On the other hand, the present invention proposes location variation and speed of service scaling method simultaneously, and steps are as follows：
Step 1：Three corner reflectors are set on testee so that three corner reflectors can be run simultaneously with testee；
Step 2：Adjust laser, spectroscope, three corner reflectors, prism, photodetector one, photodetector two
Position relationship, the first reflecting surface of laser beam three corner reflectors of incidence, is incident to the second reflecting surface after the first reflective surface,
Spectroscope is incident to after the second reflective surface, laser beam is divided into laser beam one and laser beam two by the spectroscope, described
Laser beam one is incident to prism, is received by photodetector one after prism transmission, and the laser beam two is incident to photodetection
Device two；
Step 3：Under standard movement direction, speed V1, V2, V3 ... Vn of different sizes is given, is recorded under corresponding speed
Photodetector one location variation X1, X2, X3 ... Xn, record corresponding speed under photodetector two change in location
Y1, Y2, Y3 ... Yn are measured, revised photoelectric probe position variable quantity is X1-kY1, X2-kY2, X3-kY3 ... Xn-kYn,α 2 is the angle of the laser beam and the receiving plane of photodetector two that are incident to photodetector two, and α 1 is
It is incident to the angle of the laser beam of photodetector one and the receiving plane of photodetector one, standard is obtained by nonlinear fitting
Under the direction of motion, the formula and/or relation curve of the location variation of movement velocity and photodetector.
On the other hand, the present invention also provides a kind of above-mentioned tachogenerators that correcting principle is carried based on Doppler effect
Measurement method includes the following steps：
Three corner reflectors are set on testee so that three corner reflectors can be run simultaneously with testee；
Adjust the position pass of laser, spectroscope, three corner reflectors, prism, photodetector one, photodetector two
System, the first reflecting surface of laser beam three corner reflectors of incidence, is incident to the second reflecting surface, through second after the first reflective surface
Spectroscope is incident to after reflective surface, laser beam is divided into laser beam one and laser beam two, the laser beam by the spectroscope
One is incident to prism, is received by photodetector one after prism transmission, and the laser beam two is incident to photodetector two；
Testee does irregular operation, and laser transmitting in motion process along the direction closer or far from laser
First reflecting surface of the laser beam along same optic path to triangle reflecting surface；
The variable quantity and photoelectricity of the incoming position of the laser beam one received during the motion according to photodetector one
The incoming position variable quantity of detector two, calculates the speed of testee.
Compared with prior art, using a kind of biography that tests the speed carrying correcting principle based on Doppler effect provided by the invention
Sensor and its measurement method, advantage are：The present invention passes through Doppler effect：Refer to object radiation wavelength because light source and
The relative motion of observer and generate variation, while it is different to the laser refraction angle of different wave length according to prism, visited according to photoelectricity
Survey the variable quantity of the incoming position for the laser beam one that device one receives during the motion and the incoming position of photodetector two
Variable quantity calculates the speed of testee.Tachogenerator of the present invention is simple in structure, at low cost, and utilizes photodetector two
Incoming position variable quantity have modified and make caused by the deviation that itself light path generates because the direction of motion of object is irregular
Measurement error avoids influence of the movement of testee in other directions to tachometric survey, and measurement accuracy is compared with conventional method
It is significantly increased.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of knot based on tachogenerator of the Doppler effect with correcting principle provided in the embodiment of the present invention
Structure schematic diagram.
Fig. 2 is another structure provided in the embodiment of the present invention based on test the speed biography of the Doppler effect with correcting principle
The structural schematic diagram of sensor.
Fig. 3 is another structure provided in the embodiment of the present invention based on test the speed biography of the Doppler effect with correcting principle
The structural schematic diagram of sensor.
Description of symbols in figure
Laser 1, laser beam 2, laser beam 1, laser beam 2 22, spectroscope 3, testee 4, three corner reflectors 5,
First reflecting surface 51, the second reflecting surface 52, prism 6, prism facets 1, prism facets 2 62, photodetector 1, photodetection
Device 28.
Specific implementation mode
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
It should be noted that standard movement direction described herein refers to, the direction of motion and lasing light emitter of testee
Laser direction it is identical；Irregular traffic direction refers to, testee to lasing light emitter closer or far from motion process in, remove
Direction other than standard movement direction.
Referring to Fig. 1, the present embodiment schematically discloses a kind of biography that tests the speed with correcting principle based on Doppler effect
Sensor, including laser 1, laser beam 2, laser beam 1, laser beam 2 22, spectroscope 3, three corner reflectors 5, prism 6, photoelectricity
Detector 1, photodetector 28, intermediate cam speculum, 5 include the first reflecting surface 51 and the second reflecting surface 52, while three
Corner reflector 5 is attached on testee 4, and the prism 6 includes prism facets 1 and prism facets 2 62.
The utility model is based in tachogenerator of the Doppler effect with correcting principle：
For laser 1 for launching laser beam 2, laser beam 2 is incident to the first reflecting surface 51 of three corner reflectors 5, through the
It is incident to second reflecting surface 52 after the reflection of one reflecting surface 51；Spectroscope 3 receives the laser beam 2 of the second reflecting surface 52 reflection
Afterwards so that laser beam 2 is divided into laser beam 1 and laser beam 2 22, and the laser beam 1 is made to be incident to the rib of prism 6
Minute surface 1, prism facets 1 are so that incident laser beam 1 occurs to reflect and is incident to prism facets 2 62, prism facets 2 62
So that laser beam 1 reflects again, and project, photodetector 1 receives the laser beam one projected by prism facets 2 62
21, and measure its incoming position.Meanwhile photodetector 28 receives the laser beam 2 22 for dividing injection by spectroscope 3, and measure
Its incoming position.Processing system, incoming position variable quantity, the photoelectricity of the laser beam one for being received according to photodetector one
The incoming position variable quantity for the laser beam two that detector two receives, calculates the speed of testee.
As shown in Figure 1, arrow direction is the direction of motion of testee and three corner reflectors, testee and three corner reflections
Position before mirror movement is indicated by the solid line, and testee is represented by dashed line with three corner reflector post exercise positions.In addition, light
Electric transducer 1 is all made of PSD (Position-Sensitive Detector), the laser beam one before testee movement with photoelectric sensor 28
21 is indicated by the solid line with laser beam 2 22, and testee post exercise laser beam 1 is represented by dashed line with laser beam 2 22, swashs
Light beam 1 and the transmission path of laser beam 2 22 are as follows：
Before testee movement, for laser 1 for launching laser beam 2, laser beam 2 is incident to the of three corner reflectors 5
One reflecting surface 51 is incident to second reflecting surface 52 after the reflection of the first reflecting surface 51；Spectroscope 3 receives the second reflecting surface 52
After the laser beam 2 of reflection so that laser beam 2 is divided into laser beam 1 and laser beam 2 22, and the laser beam 1 is entered
The prism facets 1 of prism 6 are incident upon, prism facets 1 are so that incident laser beam 1 occurs to reflect and is incident to prism facets two
62, so that laser beam 1 reflects again, and projects, photodetector 1 is received by prism facets 2 62 prism facets 2 62
The laser beam 1 of injection, and measure its incoming position.It is denoted as the first incoming position herein at this time.
Meanwhile photodetector 28 receives the laser beam 2 22 for dividing injection by spectroscope 3, and measure its incoming position.This
When be denoted as the second incoming position herein.
(testee does irregular movement along the direction closer or far from laser, i.e., edge is not advised after testee movement
Then the direction of motion moves), for laser 1 for launching laser beam 2, laser beam 2 is incident to the first reflecting surface of three corner reflectors 5
51, it is incident to second reflecting surface 52 after the reflection of the first reflecting surface 51；Spectroscope 3 receives swashing for the second reflecting surface 52 reflection
After light beam 2 so that laser beam 2 is divided into laser beam 1 and laser beam 2 22, and the laser beam 1 is made to be incident to prism 6
Prism facets 1, prism facets 1 are so that incident laser beam 1 occurs to reflect and is incident to prism facets 2 62, prism facets
2 62 so that laser beam 1 reflects again, and projects, and photodetector 1 receives the laser projected by prism facets 2 62
Beam 1, and measure its incoming position.It is denoted as third incoming position herein at this time.
Meanwhile photodetector 28 receives the laser beam 2 22 for dividing injection by spectroscope 3, and measure its incoming position.This
When be denoted as the 4th incoming position herein.
The incoming position that photodetector one detects is can be obtained according to the first incoming position and third incoming position to become
Change amount, meanwhile, the incidence that photodetector two detects can be calculated by the second incoming position and the 4th incoming position
Location variation, the location variation detected to photodetector one are modified, and recycle revised location variation
The size of the movement velocity of accurate testee can be calculated.
Doppler shift formula is as follows：
The frequency relation of observer and emission source is shown in formula 1：
F ' is the frequency observed；
F is original transmitted frequency of the transmitting in the medium；
V is the gait of march of wave in the medium；
v0For observer's movement speed, if close to emission source front oeprator be+number, otherwise for-number；
vsFor emission source movement speed, if close to observer front oeprator be-number, otherwise for+number.
For the present invention, laser emitting source is stationary, then Doppler shift formula can be reduced to formula 2：
Since the wavelength of optical material refractive index and light belongs to non-linear relation, the biography that tests the speed based on above structure
Sense, the present invention propose a kind of scaling method of location variation and movement velocity, and steps are as follows：
Step 1：Three corner reflectors are set on testee so that three corner reflectors can be run simultaneously with testee；
Step 2：Adjust laser, spectroscope, three corner reflectors, prism, photodetector one, photodetector two
Position relationship, the first reflecting surface of laser beam three corner reflectors of incidence, is incident to the second reflecting surface after the first reflective surface,
Spectroscope is incident to after the second reflective surface, laser beam is divided into laser beam one and laser beam two by the spectroscope, described
Laser beam one is incident to prism, is received by photodetector one after prism transmission, and the laser beam two is incident to photodetection
Device two；
Step 3：Under standard movement direction, speed V1, V2, V3 ... Vn of different sizes is given, is recorded under corresponding speed
Photodetector one location variation X1, X2, X3 ... Xn, record corresponding speed under photodetector two change in location
Y1, Y2, Y3 ... Yn are measured, revised photoelectric probe position variable quantity is X1-kY1, X2-kY2, X3-kY3 ... Xn-kYn,α 2 is the angle of the laser beam and the receiving plane of photodetector two that are incident to photodetector two, and α 1 is
It is incident to the angle of the laser beam of photodetector one and the receiving plane of photodetector one, as shown in Fig. 2, passing through Nonlinear Quasi
It closes and obtains under standard movement direction, the formula and/or relation curve of the location variation of movement velocity and photodetector.
In practical applications, you can the formula or relation curve and photodetector one obtained according to above-mentioned scaling method
The incoming position variable quantity measured with photodetector two, obtains the movement velocity of testee.
(solid line being located above in figure between PSD1 and prism is equivalent line) as shown in figures 2 and 3, due to testee
The direction of motion it is irregular so that during movement, the laser beam of the second reflective surface of three corner reflectors cannot edge
Original optical path is incident to the prism facets one of prism, but certain offset (t shown in figure) has occurred, after leading to prism transmission
Laser beam is deviated in the incoming position of photodetector one when compared to being moved along standard movement direction, and offset is
X1 shown in figure so that the displacement variable (being assumed to be x) that photodetector one is actually detected, both stimulated light wavelength change
It is caused, it is also irregularly caused by the direction of motion, therefore to eliminate and calculate error caused by direction of motion scrambling.By Fig. 2 or 3
It is found thatTherefore haveIt is i.e. practical to photodetector one
The displacement variable x detected is modified, and revised displacement is：α 2 is incidence
To the angle of the receiving plane of the laser beam and photodetector two of photodetector two, α 1 is to be incident to swashing for photodetector one
The angle of light beam and the receiving plane of photodetector one.Again with revised displacement and formula obtained by calibrating or relation curve
The movement velocity of testee can be calculated.
As a kind of preferably embodiment, the angle of first reflecting surface, 8 and second reflecting surface 9 is right angle.It is easy
Understand, herein by the angle of the first reflecting surface 8 and the second reflecting surface 9 be set as right angle be for the ease of the arrangement of each component,
The size for reducing whole equipment as far as possible, and facilitates the calculating of testee movement velocity, is ensureing that laser beam is incident to triangle
First reflecting surface 8 of speculum 5 is incident to second reflecting surface 9, the second reflecting surface 9 after the reflection of the first reflecting surface 8
In the case of can be by laser reflection to spectroscope 5, the angle number of degrees of the first reflecting surface and the second reflecting surface not be limited.
It is attached on testee 4 as one kind preferably embodiment, three corner reflectors 5, three corner reflectors are with quilt
It surveys the movement of object and moves.By the way that directly three corner reflectors are fixed on testee, wave source and observer can be reached
The purpose that relative position changes, and realize that reflection laser is moved synchronously with moving for testee.
As a kind of preferably embodiment, prism facets 1 with prism facets 2 62 are at an acute angle connects.Ensureing laser beam
One 21 entrance prisms 6, prism 6 make the laser beam 1 reflect, and after transmiting away, and laser beam 1 still can be incident
In the case of photodetector 1, the angle number of degrees of prism facets 1 and prism facets 2 62 are not limited.
As a kind of preferably embodiment, the material of the prism 6 is preferably photonic crystal.Photonic crystal is used herein
Be in order to reduce the dispersion of light with it is weak, ensure laser beam 1 remain to be incident to photodetector 1 in the case of, to rib
The material of mirror is not limited.
As a kind of preferably embodiment, the receiving plane of the photodetector 1 and second through three corner reflectors
The laser beam that reflecting surface 9 reflects is parallel, and the receiving plane of photodetector 28 is reflected with the second reflecting surface 9 through three corner reflectors
Laser beam it is vertical.Readily comprehensible, setting herein is and testee to be facilitated to move to reduce the size of whole equipment
The calculating of speed does not limit the placement angle of photodetector herein.
Preferably meet as one kind preferably embodiment, spectroscopical placement position：The laser beam of second reflective surface
It is incident to spectroscope in 45 ° so that the overall structure of tachogenerator is beautiful, and the placement position of certain spectroscope and prism also may be used
To be not particularly limited, as shown in Figures 2 and 3.
The band correcting principle tachogenerator based on Doppler effect provided in above-mentioned the present embodiment is based on Doppler
Effect realizes that the structure of entire tachogenerator is simple, at low cost, and high certainty of measurement.
Based on the above-mentioned tachogenerator for carrying correcting principle based on Doppler effect, measurement method includes following step
Suddenly：
Step 1：
Three corner reflectors are set on testee so that three corner reflectors can be run simultaneously with testee；
Step 2：
Adjust the position pass of laser, spectroscope, three corner reflectors, prism, photodetector one, photodetector two
System, the first reflecting surface of laser beam three corner reflectors of incidence, through the first reflective surface to the second reflecting surface, through the second reflecting surface
Spectroscope is incident to after reflection, laser beam is divided into laser beam one and laser beam two by the spectroscope, and the laser beam one is incident
It to prism, is received by photodetector one after prism transmission, the laser beam two is incident to photodetector two；
Step 3：
Testee does irregular operation, and laser transmitting in motion process along the direction closer or far from laser
First reflecting surface of the laser beam along same optic path to triangle reflecting surface；
Step 4：
The variable quantity and photoelectricity of the incoming position of the laser beam one received during the motion according to photodetector one
The incoming position variable quantity of detector two, calculates the speed of testee.
When testee is run not in accordance with standard movement direction, incoming position variable quantity on photodetector one by
Two factors determine, i.e. the speed of service (size) and traffic direction of testee, in this embodiment scheme, pass through photodetection
The incoming position variable quantity that device two measures can measure change in location caused by the direction of motion, therefore, utilize photodetector two
The data that the data measured measure photodetector one are modified, you can eliminate number of the direction of motion to photodetector one
According to influence, and then improve measure accuracy.
The above description is merely a specific embodiment, and scope of protection of the present invention is not limited thereto, any ripe
It knows those skilled in the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, should all cover
Within protection scope of the present invention.
Claims (9)
1. a kind of based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that including：
It can be with synchronization-moving three corner reflector of testee, including the first reflecting surface and the second reflecting surface；
Laser, for launching laser beam；
The laser beam is incident to first reflecting surface of three corner reflectors, is incident to after the first reflective surface described
Second reflecting surface；
Spectroscope, the laser beam for receiving the second reflective surface, and laser beam is divided into laser beam one and laser beam two；
The laser beam one, is incident to prism；
The prism for making incident laser beam one reflect, and transmits away；
Photodetector one for receiving the laser beam one transmitted from the prism, and measures its incoming position；
Photodetector two for receiving the laser beam two transmitted from the spectroscope, and measures its incoming position；
Processing system, incoming position variable quantity, the photodetector of the laser beam one for being received according to photodetector one
The incoming position variable quantity of two laser beams two received, calculates the speed of testee.
2. according to claim 1 based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that described
Angle between the first reflecting surface and the second reflecting surface of three corner reflectors is right angle.
3. according to claim 1 or 2 based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that
The laser beam of second reflective surface is incident to spectroscope in 45 °.
4. according to claim 1 based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that described
The material of prism is photonic crystal.
5. according to claim 4 based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that described
Prism includes prism facets one and prism facets two, and the laser beam one projected through spectroscope point is incident to the prism facets one of prism,
And reflect, when the laser beam one after reflecting is incident to prism facets two, prism facets two are so that laser beam one occurs again
Refraction, and laser beam one is made to be projected from prism facets two.
6. according to claim 5 based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that described
Prism facets one connect with prism facets two, and angle is acute angle.
7. according to claim 1 based on tachogenerator of the Doppler effect with correcting principle, which is characterized in that photoelectricity
The receiving plane of detector one is parallel with through the laser beam of the second reflective surface of three corner reflectors；And/or photodetector two
Receiving plane it is vertical with through the laser beam of the second reflective surface of three corner reflectors.
8. according to any change in location based on tachogenerator of the Doppler effect with correcting principle of claim 1-7
Amount and movement velocity scaling method, which is characterized in that steps are as follows：
Step 1：Three corner reflectors are set on testee so that three corner reflectors can be run simultaneously with testee；
Step 2：Adjust the position of laser, spectroscope, three corner reflectors, prism, photodetector one, photodetector two
Relationship, the first reflecting surface of laser beam three corner reflectors of incidence, is incident to the second reflecting surface, through the after the first reflective surface
Spectroscope is incident to after two reflective surfaces, laser beam is divided into laser beam one and laser beam two, the laser by the spectroscope
Beam one is incident to prism, is received by photodetector one after prism transmission, and the laser beam two is incident to photodetector two；
Step 3：Under standard movement direction, speed V1, V2, V3 ... Vn of different sizes is given, records the light under corresponding speed
Location variation X1, X2, X3 ... Xn of electric explorer one records the location variation of the photodetector two under corresponding speed
Y1, Y2, Y3 ... Yn, revised photoelectric probe position variable quantity are X1-kY1, X2-kY2, X3-kY3 ... Xn-kYn,α 2 is the angle of the laser beam and the receiving plane of photodetector two that are incident to photodetector two, and α 1 is
It is incident to the angle of the laser beam of photodetector one and the receiving plane of photodetector one, standard is obtained by nonlinear fitting
Under the direction of motion, the formula and/or relation curve of the location variation of movement velocity and photodetector.
9. according to any measurement sides based on tachogenerator of the Doppler effect with correcting principle claim 1-7
Method, which is characterized in that include the following steps：
Three corner reflectors are set on testee so that three corner reflectors can be run simultaneously with testee；
The position relationship of laser, spectroscope, three corner reflectors, prism, photodetector one, photodetector two is adjusted, is swashed
First reflecting surface of light beam three corner reflectors of incidence, is incident to the second reflecting surface after the first reflective surface, through the second reflection
It is incident to spectroscope after the reflection of face, laser beam is divided into laser beam one and laser beam two by the spectroscope, and the laser beam one enters
It is incident upon prism, is received by photodetector one after prism transmission, the laser beam two is incident to photodetector two；
Testee does irregular operation, and the laser that laser emits in motion process along the direction closer or far from laser
First reflecting surface of the beam along same optic path to triangle reflecting surface；
According to photodetector one the variable quantity and photodetector two of the incoming position of the laser beam one received incidence
Location variation calculates the speed of testee.
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