CN107421450A - Optical displacement measurement device and displacement measurement method - Google Patents
Optical displacement measurement device and displacement measurement method Download PDFInfo
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- CN107421450A CN107421450A CN201710516454.8A CN201710516454A CN107421450A CN 107421450 A CN107421450 A CN 107421450A CN 201710516454 A CN201710516454 A CN 201710516454A CN 107421450 A CN107421450 A CN 107421450A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention provides a kind of optical displacement measurement device, including：Close dark chamber, light source, diffusing light guiding plate, the first light intensity sensor, dividing plate, main control module and drive mechanism；Light source, diffusing light guiding plate, the first light intensity sensor are arranged on the dark intracavitary of closing, and the light in external environment is kept apart；Diffusing light guiding plate is arranged near light source, and the light that light source is sent uniformly weakens along diffusing light guiding plate；Dividing plate is arranged between light source and the first light intensity sensor, avoids light source direct projection to the first light intensity sensor；First light intensity sensor is connected with main control module；Drive mechanism stretches out from the dark chamber of closing, for transmitting the displacement activity in the external world；First light intensity sensor is fixedly connected with drive mechanism, is moved linearly parallel to diffusing light guiding plate.Measurement to displacement is realized by the corresponding relation of brightness and displacement.The present invention also provides the displacement measurement method suitable for above-mentioned optical displacement measurement device.
Description
Technical field
The present invention relates to range measurement field, particularly a kind of optical displacement measurement device and displacement measurement method.
Background technology
Displacement refers to variable quantity of the object relative to certain reference frame distance of a bit, and it is that description object space position becomes
The physical quantity of change.Displacement transducer is also known as linear transducer, is the sensor that displacement is converted into electricity.Displacement transducer
Development experience two stages, classical displacement transducer stage and semiconductor displacement transducer stage.The twentieth century eighties with
Before, people using classical electromagnetism as theoretical foundation, be not easy to Quantitative Monitoring and processing displacement, position, liquid level, size, stream
The physical quantitys such as amount, speed, vibration, which are converted to, to be easy to Quantitative Monitoring, is easy to make information transfer and the electrical quantities of processing.In the past 20 years,
Displacement transducer species is various, and application field constantly expands, while has increasing innovative technology to be applied in sensor,
LVDT technologies, ultrasonic technology, magnetostrictive technology, optical fiber technology such as based on OEM, when gate technique, displacement transducer skill
Art has achieved breakthrough.Due to the progress of technology so that various sensor performances increase substantially, and cost significantly drops
It is low, so as to greatly extend application, form the industry of a rapid growth.
However, at present the range in 10-50mm, precision be 0.1mm surveying range in, can be suitably used for strong-electromagnetic field environment
Inexpensive displacement measuring equipment also temporarily lack, can not easily popularization and application.
The content of the invention
The present invention is for overcome the deficiencies in the prior art, there is provided a kind of optical displacement measurement device and displacement measurement method.
To achieve these goals, the present invention provides a kind of optical displacement measurement device, including：Close dark chamber, light source, diffusion
Light guide plate, the first light intensity sensor, dividing plate, main control module and drive mechanism；The light source, diffusing light guiding plate, the first light intensity pass
Sensor is arranged on the dark intracavitary of closing, and the dark chamber of closing is used to keep apart the light in external environment；The diffusing light guiding plate
It is arranged near light source, for making the light that light source is sent uniformly spread decrease along diffusing light guiding plate；The dividing plate is arranged on light
Between source and the first light intensity sensor, the light direct beam that light source is sent is avoided to the first light intensity sensor；First light intensity passes
Sensor is connected with main control module, for the data received to be sent into main control module；The drive mechanism is from the dark chamber of closing
Stretch out, for transmitting the displacement activity in the external world；First light intensity sensor is fixedly connected with drive mechanism, in drive mechanism
Moved linearly under drive parallel to diffusing light guiding plate, the extended line of motion track passes through light source.
Close dark chamber to fall the light isolation of outside, dividing plate keeps apart light source and the first light intensity sensor, makes the first light
Strong sensor can only receive the light that light source sends and passed over by diffusing light guiding plate, and obtained measurement data is interference-free,
Effectively reduce error.The uniform light that diffusing light guiding plate sends light source diffusion profile on the panel of diffusing light guiding plate,
When first light intensity sensor moves in diffusing light guiding plate side, the intensity signal received is consecutive variations, while can be
There is obvious light intensity to change in shorter distance, ensure that the precision of measurement.For a stabilized light source, intensity of illumination and with light
The distance between source is one-to-one relation, therefore records and change by reading out the variable quantity of light intensity, and by main control module
Calculate the displacement of the first light intensity sensor.It is connected due to the first light intensity sensor and outside by drive mechanism, therefore
The displacement data for the object that needs measure can easily be drawn.Light is propagated by diffusing light guiding plate, will not be by magnetic field
Interference, can be used under strong magnetic field circumstance.
In one embodiment of the invention, the light source is arranged on diffusing light guiding plate end, and the light source includes constant light source.
End mentioned here, refer to the marginal portion of the luminescent panel end positioned at diffusing light guiding plate.Light source is arranged on
Diffusing light guiding plate end, the light sent from the light guiding surface of diffusing light guiding plate are all from light source injection and anti-in diffusing light guiding plate
Penetrate after spreading what is projected, avoid the light intensity sensor of light direct irradiation first of light source.When the light intensity of light direct projection first senses
During device, because light intensity attenuation is slow, it can not be also ascertained even if there occurs the variable quantity of displacement intensity of illumination, make equipment accurate
Ground measures.Using the constant light source including driving LED including current stabilization, it is ensured that when the first light intensity sensor moves,
The intensity of illumination of same position is identical, is avoided because light source luminescent Strength Changes make measurement deviation occur.
In one embodiment of the invention, in addition to the second light intensity sensor, second light intensity sensor are arranged on first
On the extended line of light intensity sensor movement route, the relative position between the second light intensity sensor and light source is fixed；Described second
Upright projection point of the light intensity sensor on diffusing light guiding plate is located at upright projection point and first of the light source on diffusing light guiding plate
Between upright projection point of the light intensity sensor on diffusing light guiding plate；Second light intensity sensor connects with main control module.
Due to power supply, environment is unstable or the reason such as ageing equipment, it is difficult to keeps the intensity of illumination of light source to maintain always not
Become, therefore add the second light intensity sensor.When carrying out displacement measurement, it is same that the first light intensity sensor followed by the object that need to be measured
Step motion, the relative position between the second light intensity sensor and light source immobilize.First light intensity sensor and the second light intensity pass
Sensor measures light intensity data from the two of diffusing light guiding plate diverse locations respectively, and light intensity data is divided by obtain one
Ratio.Due to light intensity and apart from one-to-one corresponding, and the second light intensity sensor is fixed, and the light intensity data received is set to
Reference value, influence of the light-intensity variation of light source to measurement accuracy can be effectively eliminated, passes through the change meter of acquisition process ratio
Calculate the distance of displacement.
With in one embodiment of the invention, the main control module is connected with light source, for controlling the start and stop of light source.
The continuation of light source is luminous and the continuous firing of light intensity sensor had both wasted the energy or can accelerate the aging of parts.
, can be according to the frequency of setting simultaneously by the first light intensity sensor, the second light intensity sensor and light source by master control module controls
Displacement measurement is actuated for, another neat closing, reduces idle run time, saved the energy, extending makes after measurement
Use the life-span.
In one embodiment of the invention, the light that the light source is sent is included in infrared ray, visible ray and ultraviolet at least
It is a kind of.
In one embodiment of the invention, the light source includes monochromatic source.
According to different use environments and equipment situation, different light can be used as light source, it is more flexible and convenient.Phase
It is more identical than in complex light, shooting angle of the monochromatic light when being reflected, it is ensured that the light in whole diffusing light guiding plate
Distribution and brightness change more smooth out.
In one embodiment of the invention, the diffusing light guiding plate profile is plate-like, one kind in narrow strip or column.
The upright projection of light intensity sensor and light source on diffusing light guiding plate is all on straight line, and diffusion is led
The reduced width of tabula rasa, the measurement to data will not have an impact.Narrower diffusing light guiding plate can survey whole optical displacement
The volume of measuring device reduces, and has saved processing cost, saves many installations and using space.
In one embodiment of the invention, the diffusing light guiding plate includes the light guide plate for being doped with scattering diluent.
Using light guide plate as substrate, doping scattering diluent is prepared into diffusing light guiding plate, can improve the scattering of light-guide plate guides light
The uniformity, when light injects diffusing light guiding plate, the monotonic decreasing of light intensity is formed by scattering, intensity of illumination with light source
Between the increase of distance smoothly reduce, avoiding the unexpected decay of light intensity causes the inaccurate situation of measurement.And pass through change
The doping of scattering diluent, light can be adjusted as distance increases the amplitude of decay, there is more preferable applicability.
The present invention also provides a kind of displacement measurement method suitable for above-mentioned optical displacement measurement device, comprises the following steps：
Point bright light source, obtain the functional relation of distance between the brightness of certain point and the point and light source on diffusing light guiding plate；
Monochrome information first is obtained from arbitrfary point, then the first light intensity sensor is subjected to displacement with the active synchronization of outside,
Then monochrome information is being obtained；
Monochrome information before and after displacement is correspondingly scaled the distance between light source, calculates the distance being subjected to displacement.
Because light source is to determine using constant light source, the in use intensity of illumination in each coordinate points
, mapped one by one between the light intensity that so just can monitor the first light intensity sensor and the position of the first light intensity sensor, from
And displacement data can be conversed by collecting the light intensity monitored change.
The present invention also provides a kind of displacement measurement method suitable for above-mentioned optical displacement measurement device, comprises the following steps：
Point bright light source, obtains two groups of brightness datas, calculates the first beam intensity ratio；
One light intensity sensor is subjected to displacement with external activity, obtains two groups of brightness datas after displacement again, calculates
Two beam intensity ratios；
The distance being subjected to displacement is calculated by the first beam intensity ratio and the second beam intensity ratio.
First light intensity sensor and the second light intensity sensor monitor the light intensity on two positions on diffusing light guiding plate respectively, its
In the second light intensity sensor position fix, and photoelectric sensor 4 is connected with the external world, can be moved linearly on optical diffusing plate 1.
After so operating, because ratio is only relevant with the location of sensor, it will not also cause to measure even if light source luminescent is unstable
Error.
Brief description of the drawings
Fig. 1 is the structural representation of optical displacement measurement device of the present invention；
Fig. 2 is the connection relationship diagram of optical displacement measurement device of the present invention；
Fig. 3 is the structural representation of the embodiment of optical displacement measurement device one of the present invention；
Fig. 4 is the schematic flow sheet of optical displacement measurement device first embodiment of the present invention；
Fig. 5 is the coordinate schematic diagram of relation between optical displacement measurement device light intensity of the present invention and distance；
Fig. 6 is the schematic flow sheet of optical displacement measurement device second embodiment of the present invention；
Fig. 7 is the coordinate signal of relation between beam intensity ratio and distance in optical displacement measurement device second embodiment of the present invention
Figure.
Each reference is in figure：
1st, dark chamber is closed；2nd, light source；3rd, diffusing light guiding plate；41st, the first light intensity sensor；42nd, the second light intensity sensor；5、
Dividing plate；6th, main control module；7th, drive mechanism.
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly,
And coordinate accompanying drawing, it is described in detail below.
Fig. 1 and 2 is refer to, the present invention provides a kind of optical displacement measurement device, including：Dark chamber 1, light source 2 are closed, spreads and leads
Tabula rasa 3, the first light intensity sensor 41, dividing plate 5, main control module 6 and drive mechanism 7；Light source 2, diffusing light guiding plate 3, the first light intensity
Sensor 41 is arranged in the dark chamber 1 of closing, is closed dark chamber 1 and is used to keep apart the light in external environment；Diffusing light guiding plate 3 is set
Put near light source 2, for making the light that light source 2 is sent, along diffusing light guiding plate 3, uniformly diffusion weakens；Dividing plate 5 is arranged on light source 2
And first between light intensity sensor 41, the light direct beam that light source 2 is sent is avoided to the first light intensity sensor 41；First light intensity senses
Device 41 is connected with main control module 5, for the data received to be sent into main control module 6；Drive mechanism 7 is from the dark chamber 1 of closing
Stretch out, for transmitting the displacement activity in the external world；First light intensity sensor 41 and drive mechanism 7 connect, in the drive of drive mechanism 7
Under moved linearly parallel to diffusing light guiding plate 3, the extended line of motion track passes through light source.
Close dark chamber 1 to fall the light isolation of outside, dividing plate 5 keeps apart the light intensity sensor 41 of light source 2 and first, makes the
One light intensity sensor 41 can only receive the light that light source 2 sends and passed over by diffusing light guiding plate 3, and obtained measurement data is not
It is disturbed, effectively reduces error.The uniform light that diffusing light guiding plate 3 sends light source 2 diffusion profile to diffusing light guiding plate 3
Panel on, when the first light intensity sensor 41 moves in diffusing light guiding plate side, the intensity signal received is consecutive variations,
There can be obvious light intensity to change in shorter distance simultaneously, ensure that the precision of measurement.For a stabilized light source, illumination
Intensity and be one-to-one relation with the distance between light source, therefore by reading out the variable quantity of light intensity, and by master control mould
Block 6 records and converses the displacement of the first light intensity sensor 41.Tied because the first light intensity sensor 41 and outside pass through to be driven
What structure 7 was connected, therefore can easily draw the displacement data for the object that needs measure.Light is passed by diffusing light guiding plate
Broadcast, will not be disturbed by magnetic field, can be used under strong magnetic field circumstance.
Fig. 1 is refer to, as a kind of embodiment, light source 2 is arranged on the end of diffusing light guiding plate 3, and light source 2 includes constant light
Source.
Light source 2 is arranged on the end of diffusing light guiding plate 3, and the light sent from the light guiding surface of diffusing light guiding plate 3 is all to spread
Projected in light guide plate 3 after reflection diffusion, so as to avoid the first light intensity sensor of light direct irradiation 41 of light source 2.Work as light
During line the first light intensity sensor 41 of direct projection, because light intensity attenuation is slow, can not even if there occurs the variable quantity of displacement intensity of illumination yet
It is ascertained, equipment is not accurately measured.Using the constant light source including driving LED including current stabilization, it is ensured that when the
When one light intensity sensor 41 moves, the intensity of illumination in same position must be identical, avoid because the luminous intensity of light source 2
Change makes measurement deviation occur.
Fig. 2 and 3 are refer to, as a kind of embodiment, in addition to the second light intensity sensor 42, the He of the first light intensity sensor 41
Second light intensity sensor 42 is arranged on the homonymy of diffusing light guiding plate 3, and the second light intensity sensor 42 is arranged on the first light intensity sensor 41
On the extended line of mobile route, upright projection point of second light intensity sensor 42 on diffusing light guiding plate 3 is located at light source 2 and spread
Between the upright projection millet cake of upright projection millet cake and the first light intensity sensor 41 on diffusing light guiding plate 3 on light guide plate 3；The
Two light intensity sensors 42 and main control module 6 connect.
Due to power supply, environment is unstable or the reason such as ageing equipment, it is difficult to keeps the intensity of illumination of light source 2 to maintain always
It is constant, therefore add the second light intensity sensor 42.When carrying out displacement measurement, the first light intensity sensor 41 followed by what need to be measured
Object is synchronized with the movement, and the relative position between the second light intensity sensor 42 and light source 2 immobilizes.The He of first light intensity sensor 41
Second light intensity sensor 42 measures light intensity data from the two of diffusing light guiding plate 3 diverse locations respectively, and by light intensity data
It is divided by obtain a ratio.Due to light intensity and apart from one-to-one corresponding, and the second light intensity sensor 42 is fixed and moved, and is set to refer to
Value, influence of the light-intensity variation of light source to measurement accuracy can be effectively eliminated, is calculated by the change of acquisition process ratio
The distance of displacement.
In one embodiment, the first light intensity sensor 41 and the second light intensity sensor 42 are arranged on diffusing light guiding plate 3
Homonymy.
In one embodiment, the first light intensity sensor 41 and the distribution of the second light intensity sensor 42 are arranged on diffusing light guiding plate
3 both sides.
As a kind of embodiment, main control module 6 is connected with light source 2, for controlling the start and stop of light source 2.
The continuation of light source 2 is luminous and the continuous firing of light intensity sensor had both wasted the energy or can accelerate the old of parts
Change.First light intensity sensor 41, the second light intensity sensor 42 and light source 2 are controlled by main control module 6, can be according to setting
Frequency is actuated for displacement measurement simultaneously, and closing is controlled by main control module 6 again after measurement, reduces idle run time,
The energy has been saved, has extended service life.
As a kind of embodiment, the light that light source 2 is sent includes at least one of infrared ray, visible ray and ultraviolet.
As a kind of embodiment, light source 2 includes monochromatic source.
According to different use environments and equipment situation, different light can be used as light source, it is more flexible and convenient.Phase
It is more identical than in complex light, shooting angle of the monochromatic light when being reflected, it is ensured that the light in whole diffusing light guiding plate 3
Distribution and brightness change more smooth out.
As a kind of embodiment, the profile of diffusing light guiding plate 3 is plate-like, one kind in narrow strip or column.
The upright projection of light intensity sensor and light source 2 on diffusing light guiding plate 3 is all on straight line, will be spread
The reduced width of light guide plate 3, the measurement to data will not have an impact.Narrower diffusing light guiding plate 3 can make whole optics position
The volume of measurer reduces, and has saved processing cost, saves many installations and using space.
As a kind of embodiment, the diffusing light guiding plate 3 includes the light guide plate for being doped with scattering diluent.
Using light guide plate as substrate, doping scattering diluent is prepared into diffusing light guiding plate 3, can improve the scattering of light-guide plate guides light
The uniformity, when light injects diffusing light guiding plate, the monotonic decreasing of light intensity is formed by scattering, intensity of illumination with light source
Between the increase of distance smoothly reduce, avoiding the unexpected decay of light intensity causes the inaccurate situation of measurement.And pass through change
The doping of scattering diluent, light can be adjusted as distance increases the amplitude of decay, there is more preferable applicability.
Fig. 4 is refer to, the present invention also provides a kind of displacement measurement method suitable for above-mentioned optical displacement measurement device, including
Following steps：
S101. bright light source is put, obtains the function of distance between the brightness of certain point and the point and light source on diffusing light guiding plate
Relation；
Light source 2 is opened, it is sent the light with certain brightness.First light intensity sensor 41 is monitored in diffusing light guiding plate
The brightness of a certain position on 3, and the distance between the position and light source 2 value are measured by graduated scale or other instruments, by brightness
And distance value corresponds the functional relation drawn between light intensity and distance.
S102. monochrome information first is obtained from arbitrfary point, then the first light intensity sensor is occurred with the active synchronization of outside
Displacement, then obtaining monochrome information；
First light intensity sensor 41 is set to the intensity of illumination at an arbitrary position, gathering current location, passes through functional relation
Calculate distance.Allow the first light intensity sensor 41 to followed by the object of measurement again to be subjected to displacement, and obtain the first light intensity biography again
Light intensity data on sensor 41.
S103. the monochrome information before and after displacement is correspondingly scaled the distance between light source, calculates what is be subjected to displacement
Distance.
By the functional relation measured in advance, main control module 6 will be inputted with the photometric data after displacement before displacement, calculated
Respective position coordinates, you can draw the distance that relative displacement occurs.
As shown in figure 5, because of light source 2 using constant light source, the illumination in each coordinate points is strong in use
What degree was all to determine, one between the light intensity that so just can monitor the first light intensity sensor and the position of the first light intensity sensor
One mapping, so as to converse displacement data by collecting the light intensity monitored change.
Fig. 6 is refer to, the present invention also provides a kind of displacement measurement method suitable for above-mentioned optical displacement measurement device, including
Following steps：
S201. bright light source is put, two groups of brightness datas is obtained, calculates the first beam intensity ratio；
Light source 2 is opened, it is sent the light with certain brightness.Respectively from the first light intensity sensor 41 and the second light intensity
Sensor 42 obtains two groups of different illumination intensity informations, and they are divided by obtain a ratio, referred to as the first beam intensity ratio.
S202. a light intensity sensor is subjected to displacement with external activity, obtains two groups of brightness datas after displacement again, is calculated
Go out the second beam intensity ratio；
First light intensity sensor 41 is subjected to displacement with the active synchronization of outside；In displacement way or after the completion of displacement, then
The secondary monochrome information for obtaining the first light intensity sensor 41 and the second light intensity sensor 42, is divided by obtain a ratio, and referred to as second
Beam intensity ratio.
S203. the distance being subjected to displacement is calculated by the first beam intensity ratio and the second beam intensity ratio；
First light intensity sensor 41 and the second light intensity sensor 42 monitor the light on diffusing light guiding plate 3 on two positions respectively
By force, wherein the second light intensity sensor position is fixed, and photoelectric sensor 4 is connected with the external world, can on optical diffusing plate 1 straight line
It is mobile.Beam intensity ratio η is introduced in this example, it is defined as：
Here I1The light intensity value monitored for the first light intensity sensor 41, I2Monitored for the second light intensity sensor 42
Light intensity value, two light intensity values monitor collection simultaneously.
As shown in fig. 7, in one embodiment, light source 2, the first light intensity sensor 41 and the second light intensity sensor 42 are successively
Set point-blank, abscissa is the distance between the first light intensity sensor 41 and the second light intensity sensor 42, ordinate
For beam intensity ratio.It was found from from reference axis, there is monotone variation feature, that is to say, that one-to-one corresponding be present between distance and beam intensity ratio
Relation, so as to collect the measurement that displacement is realized in the change of light intensity parameter by monitoring.After so operating, because ratio is only with passing
The location of sensor is relevant, even if light source 2 light it is unstable also will not cause measurement error.
In one embodiment, light source 2, the first light intensity sensor 41 and the second light intensity sensor 42 are in diffusing light guiding plate 3
On vertical point arrange successively on the same line, light source 2 is arranged on diffusing light guiding plate 3 as boundary and the first light intensity sensor 41
The relative opposite side with the second light intensity sensor 42.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical scheme makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, according to the present invention
Any simple modifications, equivalents, and modifications made to above example of technical spirit, belong to technical solution of the present invention
Protection domain.
Claims (10)
- A kind of 1. optical displacement measurement device, it is characterised in that including：Dark chamber, light source, diffusing light guiding plate, the first light intensity is closed to pass Sensor, dividing plate, main control module and drive mechanism；The light source, diffusing light guiding plate, the first light intensity sensor are arranged on the dark intracavitary of closing, and the dark chamber of closing is used for the external world Light in environment is kept apart；The diffusing light guiding plate is arranged near light source, is subtracted for making the light that light source is sent uniformly be spread along diffusing light guiding plate It is weak；First light intensity sensor is connected with main control module, for the data received to be sent into main control module；The dividing plate is arranged between light source and the first light intensity sensor, avoids the light direct beam that light source is sent from being sensed to the first light intensity On device；The drive mechanism stretches out from the dark chamber of closing, for transmitting the displacement activity in the external world；First light intensity sensor is fixedly connected with drive mechanism, straight parallel to diffusing light guiding plate under the drive of drive mechanism Line moves, and the extended line of motion track passes through light source.
- 2. optical displacement measurement device according to claim 1, it is characterised in that the light source is arranged on diffusing light guiding plate end Portion, the light source include constant light source.
- 3. optical displacement measurement device according to claim 1, it is characterised in that described also including the second light intensity sensor Second light intensity sensor is arranged on the extended line of the first light intensity sensor movement route, between the second light intensity sensor and light source Relative position fix；Upright projection point of second light intensity sensor on diffusing light guiding plate is located at light source in diffusion light-guiding Between the upright projection point of upright projection point and the first light intensity sensor on diffusing light guiding plate on plate；Second light intensity passes Sensor connects with main control module.
- 4. optical displacement measurement device according to claim 1, it is characterised in that the main control module is connected with light source, is used In the start and stop of control light source.
- 5. optical displacement measurement device according to claim 1, it is characterised in that the light that the light source is sent includes infrared At least one of line, visible ray and ultraviolet.
- 6. optical displacement measurement device according to claim 1, it is characterised in that the light source includes monochromatic source.
- 7. optical displacement measurement device according to claim 1, it is characterised in that the diffusing light guiding plate is doped with scattering diluent Light guide plate.
- 8. optical displacement measurement device according to claim 1, it is characterised in that the diffusing light guiding plate profile is plate-like, One kind in narrow strip or column.
- A kind of 9. displacement measurement method suitable for optical displacement measurement device described in claim 1, it is characterised in that the light source For constant light source, comprise the following steps：Point bright light source, obtain the functional relation of distance between the brightness of certain point and the point and light source on diffusing light guiding plate；Monochrome information first is obtained from arbitrfary point, then the first light intensity sensor is subjected to displacement with the active synchronization of outside, then Obtaining monochrome information；Monochrome information before and after displacement is correspondingly scaled the distance between light source, calculates the distance being subjected to displacement.
- 10. a kind of displacement measurement method suitable for optical displacement measurement device described in claim 1, it is characterised in that also include Second light intensity sensor, the position of second light intensity sensor and light source are relatively fixed setting, comprised the following steps：Point bright light source, obtains two groups of brightness datas, calculates the first beam intensity ratio；One light intensity sensor is subjected to displacement with external activity, is obtained two groups of brightness datas after displacement again, is calculated the second light Strong ratio；The distance being subjected to displacement is calculated by the first beam intensity ratio and the second beam intensity ratio.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108919186A (en) * | 2018-02-08 | 2018-11-30 | 深圳市海司恩科技有限公司 | Ultraviolet source localization method, ultraviolet source positioning device and storage medium |
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