CN110425984A - A kind of non-contact displacement detection device and its method based on image recognition technology - Google Patents
A kind of non-contact displacement detection device and its method based on image recognition technology Download PDFInfo
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- CN110425984A CN110425984A CN201910842225.4A CN201910842225A CN110425984A CN 110425984 A CN110425984 A CN 110425984A CN 201910842225 A CN201910842225 A CN 201910842225A CN 110425984 A CN110425984 A CN 110425984A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 98
- 238000001514 detection method Methods 0.000 title claims abstract description 60
- 238000005516 engineering process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 32
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- 238000005485 electric heating Methods 0.000 claims description 11
- 239000002826 coolant Substances 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 9
- -1 fan Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 3
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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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- 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
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Abstract
The invention belongs to equipment detection fields, and in particular to a kind of non-contact displacement detection device based on image recognition technology, and the method using device detection equipment under test displacement.The device includes image capture module (1), laser generating unit (2), data storage and transmission module (3), power supply and control module (5) and target (8)；Image capture module (1), laser generating unit (2) and data storage and transmission module (3) are connect with power supply and control module (5) respectively；Image capture module (1) and data storage and transmission module (3) connection；The distance between image capture module (1) and laser generating unit (2) are fixed；Target (8) is set on detection device；The figure that at least two has geometric center is provided at least one exposed face of target (8).Advantages of the present invention: (1) it is convenient to carry, easy for installation.(2) applied widely, adaptable, the service life is long.(3) measurement method is simple, as a result accurately.(4) deformation and displacement in three directions can be detected simultaneously, efficiently.
Description
Technical field
The invention belongs to equipment detection fields, and in particular to a kind of contactless displacement detection based on image recognition technology
Device, and the method using device detection equipment under test displacement.
Background technique
Various field equipments (such as: GIS device, oil pipeline) are exposed to field for a long time, the frequency to break down
It is larger, most of failure cause be as equipment is expanded with heat and contract with cold and caused by.Equipment in field due to being influenced by day and night temperature,
Very big displacement deformation is had, thus a series of problems, such as equipment bending, cracking can be caused.Before problem is not eliminated, equipment
A large amount of investment manpower and material resources are guaranteed that equipment operates normally, and causes very big pressure to the routine work of operation maintenance personnel by operation maintenance personnel
Power, if while some equipment occur bending, cracking the problems such as, it may appear that great security risk, life-threatening safety and country
Property safety.
Simultaneously as field equipment is insufficient in impact evaluation of the design erection stage to climatic environment, for what is run
Field equipment, there are apparent security risks, it is therefore desirable to displacement deformation amount that is accurate and monitoring field equipment in real time, in real time
Carry out security risk assessment.
Traditional routine displacement detector is mostly used tangent displacement sensor to measure, currently on the market contact position
There are many displacement sensor type, and the range that dissimilar sensor is applicable in measurement is different.Touch sensor needs and equipment under test
Contact, just can accurate measurement data, but field environment is more complicated, encounter bad weather will lead to sensor failure or
Damage, causes working efficiency low, and job costs increase.Furthermore traditional routine displacement detector is frequently with external power supply, out of office
When outer operation, it is pretty troublesome to connect electricity, while power cable leaks outside, under the mal-condition in field, it is easy to it destroys, it is not portable.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, provide it is a kind of it is easy to carry, easy to use, measurement method is simple
It is single, measurement result is accurate, non-contact displacement detection device applied widely and with long service life and its method.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of non-contact displacement detection device based on image recognition technology, including image capture module 1, laser occur
Unit 2, data storage and transmission module 3, power supply and control module 5 and target 8；
Image capture module 1, laser generating unit 2 and data storage and transmission module 3 respectively with power supply and control module 5
Connection；
Image capture module 1 and data storage and transmission module 3 connect；
The distance between image capture module 1 and laser generating unit 2 are fixed；
Target 8 is set on detection device；Being provided at least two at least one exposed face of target 8 has geometry
The figure at center.
Further, the device further includes adjustable support 6, pedestal 7 and shell 9；The image capture module
1, laser generating unit 2, data storage and transmission module 3, power supply and control module 5 are set to inside shell 9；9 bottom of shell
It is provided with pedestal 7, the bottom of pedestal 7 is connect with adjustable support 6；
Further, the pedestal 7 is Rotatable base；The triangle branch of 6 adjustable in length of adjustable support
Frame.
Further, the device further includes temperature adjustment module 4；Temperature adjustment module 4 and power supply and control module 5
It is connected.
Further, the temperature adjustment module 4 includes temp probe, fan, coolant circulation system and electric heating
System；Temp probe, fan, coolant circulation system and electric heating system are connect with power supply and control module 5 respectively.
Further, the image capture module 1 is high-precision, fine definition camera.
The non-contact displacement detection device detection device position based on image recognition technology is utilized the present invention also provides a kind of
The method of shifting.
A kind of contactless displacement detection method based on image recognition technology comprising the steps of:
S101 will test front or main displacement deformation direction and its vertical direction that device is fixed on equipment, leveling；
Target is fixed on equipment under test, and the spot center for projecting laser generating unit is located on target, is detected
Actual range of the device away from target is L0；
Defining the direction that two geometrical center lines are parallel on target is X-direction, target and detection device
Between horizontal distance direction be Y-direction, the direction vertical with plane XY be Z-direction；
S102 image capture module shoots an image, and the pixel distance of two geometrical centers is X on image0, clap
The Pixel Dimensions of the one of geometrical center of LASER SPECKLE centre distance are L in X-direction component on the image taken the photographX0, in the side Y
It is L to componentY0, the proportionality coefficient of Pixel Dimensions on the image of physical length and shooting are as follows: K=XIt is practical/X0；
LASER SPECKLE center initial position is calculated apart from the geometrical center X-direction actual size LX0 is practical=K ×
LX0, Y-direction actual size LY0 is practical=K × LY0；
S103 calculates the deformation displacement in equipment under test horizontal X direction and Y-direction, and image capture module shoots a figure
Picture, two geometrical center pixel distances are X on image1, pixel of the spot center away from side geometrical center on image
Size is L in X-direction componentX1, component is L in the Y directionY1, the proportionality coefficient of Pixel Dimensions on the image of physical length and shooting
Are as follows: K1=XIt is practical/X1, LASER SPECKLE center initial position is calculated apart from the geometrical center X-direction actual size LX1 is practical=
K×LX1, Y-direction actual size LY1 is practical=K × LY1, so, actual displacement D occurs for physical device X-directionX is practical=LX1 is practical-
LX0 is practical, Y-direction generation actual displacement DY is practical=LY1 is practical-LY0 is practical；
S104 calculates the displacement in equipment under test Z-direction, and the actual range of two geometrical centers is on target
XIt is practical, the distance away from camera lens is L before target is subjected to displacement0, the distance away from camera lens is L after target is subjected to displacement1；
The image distance of two geometrical centers is X on target before being subjected to displacementAs before, it is subjected to displacement on rear target
The image distance of two geometrical centers is XAs after, the distance between camera lens and image inductor are P0,
Actual displacement D occurs in Z-directionZ is practicalIt is calculated by following formula:
L0/P0=XIt is practical/XAs before, L1/P0=XIt is practical/XAs after,
Then L0=(XIt is practical/XAs before)×P0, L1=(XIt is practical/XAs after)×P0,
DZ is practical=L0-L1。
Further, target described in S101 is fixed on equipment under test, the spot center for projecting laser generating unit
Positioned on target at two geometrical centers on the same line.
Further, using the image capture module of zoom camera, before detection device comes into operation, to varifocal
The image capture module of camera carries out data acquisition, establishes database, obtain target and camera lens distance on image
The relationship of the image distance of two geometrical centers；Database is called directly during atual detection, is displaced by measurement
The image distance of two geometrical centers on the image of front and back, to directly obtain displacement front and back target and phase from database
Machine distance of camera lens obtains the vertical Z-direction shift value of equipment.
A kind of non-contact displacement detection device based on image recognition technology provided by the invention, image capture module are adopted
With high-precision, camera high-definition, it can guarantee result high precision in this way, while can also be to avoid encountering exceedingly odious day
Gas on taking pictures caused by error influence.The shell for installing an anticorrosion sand-proof additional outside image capture module, by shell bottom
Seat is fixed on front or the main displacement deformation direction and its vertical of equipment.
Laser emission element using high-precision, high irradiation distance laser emitter, in this way can under larger distance,
Hot spot can also be clearly irradiated on target, while can accurately find geometric center, ensure that accuracy.Power supply
In control module, power module is battery or the battery being connected with solar panel；Control module is single-chip microcontroller
Or PLC controller.
A kind of non-contact displacement detection device based on image recognition technology provided by the invention, data storage and transmission
Module is that the collected picture of image capture module is locally stored by SD card, then carries out data using data radio station
Transmission, in this way can in some remote districts, such as Northwest High Altitude area, marine, coal mine adverse circumstances area carry out using.
Certainly it is also not necessarily limited to the transmission mode, is also possible to other wireless transmission methods either wire transmission mode.Data transmission
Module is the 3G being connected with PLC or RTU data terminal or 4G or WiFi or ZigBee terminal.
A kind of non-contact displacement detection device based on image recognition technology provided by the invention, power module can be adopted
Use built-in power.Built-in power can provide persistently continuation of the journey to internal each device, in the protection of good shell and internal temperature
Under humid control, various field extreme environments can be coped with, are convenient for carrying simultaneously.Displacement detector also can connect external electrical
Online displacement detecting for a long time may be implemented in source.
A kind of non-contact displacement detection device based on image recognition technology provided by the invention, temperature adjustment module can
To automatically adjust equipment internal temperature.When detection device internal temperature is excessively high, more than setting numerical value when, temperature adjustment module opens
Dynamic fan and coolant circulation system, are reduced to specified value for device internal temperature；When detection device internal temperature is too low, it is lower than
When the numerical value of setting, temperature adjustment module starts electric heating module, and device internal temperature is increased to specified value.
Using adjustable support, the underface that device is placed on equipment will test, or can also will test device and be placed on and set
Standby direction of displacement or direction of displacement it is vertical, and level.
A kind of non-contact displacement detection device detection device position of the utilization based on image recognition technology provided by the invention
The method of shifting can be calculated by calculating the distance between geometrical center and laser spot on the photo that camera is shot
The deformation and displacement of equipment under test, method is simple, and as a result accuracy is high.One photo can be detected equipment under test in three directions
On deformation and displacement.
Compared with prior art, non-contact displacement detection device provided by the invention based on image recognition technology and its
The advantages of method:
(1) displacement detector of the invention carries convenient, easy for installation, without contacting with equipment under test, encounters severe
Weather will not cause displacement detector to fail.
(2) various field extreme environments can be coped with, applied widely, adaptable, service life of equipment is long.
(3) measurement method is simple, as a result accurately.
(4) deformation and displacement in three directions can be detected simultaneously, efficiently.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the non-contact displacement detection device provided by the invention based on image recognition technology；
Fig. 2 is the structure of the target of the non-contact displacement detection device provided by the invention based on image recognition technology
Schematic diagram；
Fig. 3 is the contactless displacement detection method equipment under test displacement side provided by the invention based on image recognition technology
To schematic diagram；
Fig. 4 is distance relation schematic diagram on first photo that camera provided by the invention takes；
Fig. 5 be camera provided by the invention take equipment under test displacement after photo on distance relation schematic diagram；
Fig. 6 is 6 equipment under test displacement diagram of the embodiment of the present invention.
Specific embodiment
To make those skilled in the art more fully understand technical solution of the present invention, following embodiment is to work of the invention
It is described in further detail, following embodiment is merely to illustrate invention, but is not intended to limit the scope of the invention.
A kind of non-contact displacement detection device based on image recognition technology, the device include image capture module
1, laser generating unit 2, data storage and transmission module 3, power supply and control module 5 and target 8；
Image capture module 1, laser generating unit 2 and data storage and transmission module 3 respectively with power supply and control module 5
Connection；
Image capture module 1 and data storage and transmission module 3 connect；
The distance between image capture module 1 and laser generating unit 2 are fixed；
Target 8 is set on detection device；Being provided at least two at least one exposed face of target 8 has geometry
The figure at center.
Further, the device further includes adjustable support 6, pedestal 7 and shell 9；The image capture module
1, laser generating unit 2, data storage and transmission module 3, power supply and control module 5 are set to inside shell 9；9 bottom of shell
It is provided with pedestal 7, the bottom of pedestal 7 is connect with adjustable support 6；
Further, the pedestal 7 is Rotatable base；The triangle branch of 6 adjustable in length of adjustable support
Frame.
Further, the device further includes temperature adjustment module 4；Temperature adjustment module 4 and power supply and control module 5
It is connected.
Further, the temperature adjustment module 4 includes temp probe, fan, coolant circulation system and electric heating
System；Temp probe, fan, coolant circulation system and electric heating system are connect with power supply and control module 5 respectively.
Further, the image capture module 1 is high-precision, fine definition camera.
The non-contact displacement detection device detection device position based on image recognition technology is utilized the present invention also provides a kind of
The method of shifting.
A kind of contactless displacement detection method based on image recognition technology comprising the steps of:
S101 will test front or main displacement deformation direction and its vertical direction that device is fixed on equipment, leveling；
Target is fixed on equipment under test, and the spot center for projecting laser generating unit is located on target, is detected
Actual range of the device away from target is L0；
Defining the direction that two geometrical center lines are parallel on target is X-direction, target and detection device
Between horizontal distance direction be Y-direction, the direction vertical with plane XY be Z-direction；
S102 image capture module shoots an image, and the pixel distance of two geometrical centers is X on image0, clap
The Pixel Dimensions of the one of geometrical center of LASER SPECKLE centre distance are L in X-direction component on the image taken the photographX0, in the side Y
It is L to componentY0, the proportionality coefficient of Pixel Dimensions on the image of physical length and shooting are as follows: K=XIt is practical/X0；
LASER SPECKLE center initial position is calculated apart from the geometrical center X-direction actual size
LX0 is practical=K × LX0, Y-direction actual size LY0 is practical=K × LY0；
S103 calculates the deformation displacement in equipment under test horizontal X direction and Y-direction, and image capture module shoots a figure
Picture, two geometrical center pixel distances are X on image1, pixel of the spot center away from side geometrical center on image
Size is L in X-direction componentX1, component is L in the Y directionY1,
The proportionality coefficient of Pixel Dimensions in physical length and the image of shooting are as follows: K1=XIt is practical/X1, calculate LASER SPECKLE center
Initial position is apart from the geometrical center X-direction actual size LX1 is practical=K × LX1,
Y-direction actual size LY1 is practical=K × LY1；
So actual displacement D occurs for physical device X-directionX is practical=LX1 is practical-LX0 is practical, Y-direction generation actual displacement DY is practical=
LY1 is practical-LY0 is practical；
S104 calculates the displacement in equipment under test Z-direction, and the actual range of two geometrical centers is on target
XIt is practical, the distance away from camera lens is L before target is subjected to displacement0, the distance away from camera lens is L after target is subjected to displacement1；
The image distance of two geometrical centers is X on target before being subjected to displacementAs before, it is subjected to displacement on rear target
The image distance of two geometrical centers is XAs after, the distance between camera lens and image inductor are P0,
Actual displacement D occurs in Z-directionZ is practicalIt is calculated by following formula:
L0/P0=XIt is practical/XAs before, L1/P0=XIt is practical/XAs after,
Then L0=(XIt is practical/XAs before)×P0, L1=(XIt is practical/XAs after)×P0,
DZ is practical=L0-L1。
Further, target described in S101 is fixed on equipment under test, the spot center for projecting laser generating unit
Positioned on target at two geometrical centers on the same line.
Embodiment 1
In conjunction with shown in Fig. 1~3, a kind of non-contact displacement detection device based on image recognition technology, including image are adopted
Collect module 1, laser generating unit 2, data storage and transmission module 3, power supply and control module 5 and target 8；Image Acquisition mould
Block 1, laser generating unit 2 and data storage and transmission module 3 are connect with power supply and control module 5 respectively；Image capture module 1
It is connected with data storage and transmission module 3；The distance between image capture module 1 and laser generating unit 2 are fixed；Target 8
It is set on detection device；2 circles are provided on one exposed face of target 8.
The image capture module 1 is high-precision, fine definition camera.
Embodiment 2
In conjunction with shown in Fig. 1~3, a kind of non-contact displacement detection device based on image recognition technology, including image are adopted
Collect module 1, laser generating unit 2, data storage and transmission module 3, power supply and control module 5 and target 8；Image Acquisition mould
Block 1, laser generating unit 2 and data storage and transmission module 3 are connect with power supply and control module 5 respectively；Image capture module 1
It is connected with data storage and transmission module 3；The distance between image capture module 1 and laser generating unit 2 are fixed；Target 8
It is set on detection device；2 rectangles are provided on one exposed face of target 8.The image capture module 1 is high-precision
Degree, fine definition camera.
The device further includes adjustable support 6, pedestal 7 and shell 9；The image capture module 1, laser occur
Unit 2, data storage and transmission module 3, power supply and control module 5 are set to inside shell 9；9 bottom of shell is provided with pedestal
7, the bottom of pedestal 7 is connect with adjustable support 6；The pedestal 7 is Rotatable base；6 length of adjustable support
Adjustable A-frame.
Embodiment 3
In conjunction with shown in Fig. 1~3, a kind of non-contact displacement detection device based on image recognition technology, the device
Including image capture module 1, laser generating unit 2, data storage and transmission module 3, power supply and control module 5 and target 8；
Image capture module 1, laser generating unit 2 and data storage and transmission module 3 are connect with power supply and control module 5 respectively；Figure
As acquisition module 1 and data storage and transmission module 3 connect；The distance between image capture module 1 and laser generating unit 2 are solid
It is fixed；Target 8 is set on detection device；2 hexagons are provided on one exposed face of target 8.Image capture module 1
For high-precision, fine definition camera.
The device further includes adjustable support 6, pedestal 7 and shell 9；The image capture module 1, laser occur
Unit 2, data storage and transmission module 3, power supply and control module 5 are set to inside shell 9；9 bottom of shell is provided with pedestal
7, the bottom of pedestal 7 is connect with adjustable support 6；Pedestal 7 is Rotatable base；6 adjustable in length of adjustable support
A-frame.
The device further includes temperature adjustment module 4；Temperature adjustment module 4 is connected with power supply and control module 5.It is described
Temperature adjustment module 4 include temp probe, fan, coolant circulation system and electric heating system；It is temp probe, fan, cold
But fluid circulation and electric heating system are connect with power supply and control module 5 respectively.
Embodiment 4
In conjunction with shown in Fig. 1~5, a kind of contactless displacement detection method and device based on image recognition technology, detection
Device includes image capture module (high-precision, fine definition camera), laser generator, data storage and transmission module, temperature
Adjustment module (temp probe, fan, coolant circulation system and electric heating system), power supply and control module, adjustable support,
Pedestal and target and shell.
Target is in use, if equipment has particular/special requirement or equipment surface that cannot install target in installation targets target
In equipment under test parallel position, guarantee that target can be moved with equipment under test.Detection device place when, need by
Equipment is placed in the visual field of detection device.
Image capture module can guarantee result high precision using high-precision, camera high-definition in this way, while
Can to avoid exceedingly odious weather is encountered on taking pictures caused by error influence.Install an anticorrosion additional outside image capture module
Outer casing base is fixed on front or the main displacement deformation direction and its vertical of equipment by the shell of sand-proof.
Laser emission element using high-precision, high irradiation distance laser emitter, in this way can under larger distance,
Hot spot can also be clearly irradiated on target, while can accurately find geometric center, ensure that accuracy.
Present embodiment data storage and transmission module are to carry out the collected picture of image capture module by SD card
It is locally stored, is then carried out data transmission using data radio station, it in this way can be in some remote districts, such as Northwest High Altitude
The adverse circumstances such as area, sea, coal mine area carry out using.Certainly it is also not necessarily limited to the transmission mode, is also possible to other wireless
Transmission mode either wire transmission mode.
Present embodiment uses built-in power.Built-in power can provide persistently continuation of the journey to internal each device, good
Shell protection and internal temperature humid control under, various field extreme environments can be coped with, be convenient for carrying simultaneously.Displacement detecting
Device also can connect external power supply, and online displacement detecting for a long time may be implemented.
Temperature adjustment module can automatically adjust equipment internal temperature.When detection device internal temperature is excessively high, more than setting
Numerical value when, temperature adjustment module starts fan and coolant circulation system, and device internal temperature is reduced to specified value；Work as inspection
Survey device internal temperature it is too low, lower than setting numerical value when, temperature adjustment module start electric heating module, by device internal temperature
It is increased to specified value.
Using adjustable support, the underface that device is placed on equipment will test, or can also will test device and be placed on and set
Standby direction of displacement or direction of displacement it is vertical, and level.
It is round example with design reference figure on target two sides, is also possible to circle, hexagon, triangle, pros
Shape, other figures such as rectangle.The actual range of two geometric centers is XIt is practical, XIt is practicalLength be 300mm.
When measurement, keep target geometrical center line parallel with X-direction, target is moved with equipment, and
Laser facula is fixed.
When starting measurement, image capture module shoots an image, the pixel distance X of two circular centrals on image0
=150mm, the Pixel Dimensions of the one of circular central of LASER SPECKLE centre distance are in X-direction component L on the image of shootingX0=
75mm, in the Y direction component LY0The proportionality coefficient of Pixel Dimensions on the image of=50mm, physical length and shooting are as follows: K=XIt is practical/X0
=2.
X-direction actual size of the LASER SPECKLE center initial position apart from the circular central can be calculated
LX0 is practical=K × LX0=150mm；
Y-direction actual size LY0 is practical=K × LY0=100mm.
Embodiment 5
In conjunction with shown in Fig. 1~5, the deformation displacement in horizontal X direction and Y-direction, image capture module occur for equipment under test
Shoot an image, two circular central pixel distance X on image1=150mm, spot center is round away from side on image at this time
The Pixel Dimensions at center are in X-direction component LX1=50mm, in the Y direction component LY1On the image of=25mm, physical length and shooting
The proportionality coefficient of Pixel Dimensions are as follows: K1=XIt is practical/X1=2, LASER SPECKLE center initial position can be calculated in the circle
The X-direction actual size L of the heartX1 is practical=K × LX1=100mm, Y-direction actual size LY1 is practical=K × LY1=50mm,
So actual displacement D occurs for physical device X-directionX is practical=LX1 is practical-LX0 is practical=-50mm；
Actual displacement D occurs for Y-directionY is practical=LY1 is practical-LY0 is practical=-50mm；
"+", "-" represent direction, and "+" is i.e. mobile to reference axis forward direction, and "-" is i.e. mobile to reference axis negative sense.
Embodiment 6
In conjunction with shown in Fig. 1~6, the displacement in vertical Z-direction occurs for equipment under test, and spot center is away from side circle on target
The actual range X at shape centerIt is practical=300mm, image distance of the spot center away from the circular central on target before being subjected to displacement
XAs before=30mm is subjected to displacement on rear target spot center away from the circular image distance XAs after=40mm, camera lens with
The distance between image inductor P0=20mm.
According to camera imaging principle, can obtain:
L0/P0=HIt is practical/HAs before, L1/P0=HIt is practical/HAs after, then L0=(XIt is practical/XAs before)×P0=200mm,
L1=(XIt is practical/XAs after)×P0=150mm, DZ is practical=L0-L1=50mm.
"+", "-" represent direction, and "+" is i.e. mobile to reference axis forward direction, and "-" is i.e. mobile to reference axis negative sense.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of transformation can be carried out to technical solution of the present invention, these letters within the scope of the technical concept of the present invention
Monotropic type all belongs to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments and step,
In the case of no contradiction, it can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention couple
No further explanation will be given for various combinations of possible ways.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. a kind of non-contact displacement detection device based on image recognition technology, which is characterized in that the device includes figure
As acquisition module (1), laser generating unit (2), data storage and transmission module (3), power supply and control module (5) and target
(8)；
Image capture module (1), laser generating unit (2) and data storage and transmission module (3) respectively with power supply and control mould
Block (5) connection；
Image capture module (1) and data storage and transmission module (3) connection；
The distance between image capture module (1) and laser generating unit (2) are fixed；
Target (8) is set on detection device；Being provided at least two at least one exposed face of target (8) has geometry
The figure at center.
2. a kind of non-contact displacement detection device based on image recognition technology according to claim 1, feature exist
In: the device further includes adjustable support (6), pedestal (7) and shell (9)；
Image capture module (1), laser generating unit (2), data storage and the transmission module (3), power supply and control mould
It is internal that block (5) is set to shell (9)；
Shell (9) bottom is provided with pedestal (7), and the bottom of pedestal (7) is connect with adjustable support (6).
3. a kind of non-contact displacement detection device based on image recognition technology according to claim 2, feature exist
In: the pedestal (7) is Rotatable base；The A-frame of described adjustable support (6) adjustable in length.
4. a kind of contactless displacement based on image recognition technology according to any one of claims 1 to 3 detects dress
It sets, it is characterised in that: the device further includes temperature adjustment module (4)；
Temperature adjustment module (4) is connected with power supply and control module (5).
5. a kind of non-contact displacement detection device based on image recognition technology according to claim 4, feature exist
In: the temperature adjustment module (4) includes temp probe, fan, coolant circulation system and electric heating system；
Temp probe, fan, coolant circulation system and electric heating system are connect with power supply and control module (5) respectively.
6. a kind of non-contact displacement detection device based on image recognition technology according to claim 4 or 5, feature
Be: the image capture module (1) is high-precision, fine definition camera.
7. a kind of contactless displacement detection method based on image recognition technology, which is characterized in that this method includes following step
It is rapid:
S101 will test front or main displacement deformation direction and its vertical direction that device is fixed on equipment, leveling；
Target is fixed on equipment under test, and the spot center for projecting laser generating unit is located on target, detection device
Actual range away from target is L0；
Defining the direction that two geometrical center lines are parallel on target is X-direction, between target and detection device
The direction of horizontal distance is Y-direction, and the direction vertical with plane XY is Z-direction；
S102 image capture module shoots an image, and the pixel distance of two geometrical centers is X on image0, the figure of shooting
As the Pixel Dimensions of the upper one of geometrical center of LASER SPECKLE centre distance are L in X-direction componentX0, component in the Y direction
For LY0, the proportionality coefficient of Pixel Dimensions on the image of physical length and shooting are as follows: K=XIt is practical/X0；
LASER SPECKLE center initial position is calculated apart from the geometrical center X-direction actual size LX0 is practical=K × LX0, Y
Direction actual size LY0 is practical=K × LY0；
S103 calculates the deformation displacement in equipment under test horizontal X direction and Y-direction, and image capture module shoots an image, figure
As upper two geometrical center pixel distances are X1, spot center exists away from the Pixel Dimensions of side geometrical center on image
X-direction component is LX1, component is L in the Y directionY1, the proportionality coefficient of Pixel Dimensions on the image of physical length and shooting are as follows: K1=
XIt is practical/X1, LASER SPECKLE center initial position is calculated apart from the geometrical center X-direction actual size LX1 is practical=K × LX1, Y
Direction actual size LY1 is practical=K × LY1, so, actual displacement D occurs for physical device X-directionX is practical=LX1 is practical-LX0 is practical, Y-direction
Actual displacement D occursY is practical=LY1 is practical-LY0 is practical；
S104 calculates the displacement in equipment under test Z-direction, and the actual range of two geometrical centers is X on targetIt is practical, mesh
The distance away from camera lens is L before target is subjected to displacement0, the distance away from camera lens is L after target is subjected to displacement1；
The image distance of two geometrical centers is X on target before being subjected to displacementAs before, two are subjected to displacement on rear target
The image distance of geometrical center is XAs after, the distance between camera lens and image inductor are P0,
Actual displacement D occurs in Z-directionZ is practicalIt is calculated by following formula:
L0/P0=XIt is practical/XAs before, L1/P0=XIt is practical/XAs after,
Then L0=(XIt is practical/XAs before)×P0, L1=(XIt is practical/XAs after)×P0,
DZ is practical=L0-L1。
8. a kind of contactless displacement detection method based on image recognition technology according to claim 7, feature exist
In: target described in S101 is fixed on equipment under test, and the spot center for projecting laser generating unit is located at two on target
At a geometrical center on the same line.
9. a kind of contactless displacement detection method based on image recognition technology according to claim 7 or 8, feature
It is:
Using the image capture module of zoom camera, before detection device comes into operation, the image of zoom camera is adopted
Collect module and carry out data acquisition, establishes database, obtain in target and camera lens distance and two geometric figures on image
The relationship of the image distance at center；
Database is called directly during atual detection, and the figure of two geometrical centers on the image of front and back is displaced by measurement
Image distance is from obtaining the vertical Z-direction position of equipment to directly obtain displacement front and back target and camera lens distance from database
Shifting value.
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