CN110308453A - More laser spot position detection devices and method based on line array CCD and FPGA - Google Patents
More laser spot position detection devices and method based on line array CCD and FPGA Download PDFInfo
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- CN110308453A CN110308453A CN201910569735.9A CN201910569735A CN110308453A CN 110308453 A CN110308453 A CN 110308453A CN 201910569735 A CN201910569735 A CN 201910569735A CN 110308453 A CN110308453 A CN 110308453A
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000013500 data storage Methods 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011326 mechanical measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000036186 satiety Effects 0.000 description 1
- 235000019627 satiety Nutrition 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/4861—Circuits for detection, sampling, integration or read-out
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/491—Details of non-pulse systems
- G01S7/4912—Receivers
- G01S7/4913—Circuits for detection, sampling, integration or read-out
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
The invention discloses a kind of more laser spot position detection devices and method based on line array CCD and FPGA, device include laser emitting module, ccd sensor module, FPGA signal processing module, data storage and transmission module and host computer.Method includes: laser emitting module Vertical Launch multi beam line laser to part surface to be measured；Ccd sensor module acquires the laser of object reflection to be measured, and carries out photoelectric conversion；FPGA signal processing module is amplified to analog electrical signal and analog-to-digital conversion, and realizes more laser spot center positioning, and data are transmitted to data storage and transmission module and host computer by treated；Host computer seeks the corresponding location information of each hot spot according to positioning result and using laser triangulation, finally obtains the geological information of part to be measured and exports result.The present invention has many advantages, such as untouchable, highly sensitive, high-precision, strong real-time and high degree of automation, is able to satisfy industrial requirement, and it is at low cost, structure is simple, have broad application prospects.
Description
Technical field
The invention belongs to technical field of electro-optical measurement, especially a kind of more laser facula positions based on line array CCD and FPGA
Set detection device and method.
Background technique
Position sensing all has great importance in many industrial technical fields such as thickness measuring, survey width and surface testing etc., passes
The location detection methods of system include manual measurement, mechanical measurement etc., these method measurement efficiencies are low, precision is low and not can be carried out
Real-time measurement, and the measurement method having directly is contacted with measured object, can have secondary damage to measured object, these methods
It has been not applied for the industrial production of modernization.
With the development of the technologies such as photoelectric technology and mechano-electronic, the position sensing technology based on laser triangulation is gradually
It is applied.The method of photoelectric measurement has many advantages, such as that untouchable, precision is high and measuring speed is fast.It is traditional based on laser
The position sensing technology of triangulation in industrial circle such as thickness measuring and is surveyed in width, is using single-point to the mode check bit penetrated
Confidence breath, and then obtain thickness value and width value etc..This method is justifiable, if but applying it to surface testing neck
Domain, it will go wrong, this is because will be unable to avoid because tested using single-point laser detection in industrial surface testing field
Moving up and down for object and bring position detection error, thus influence surface testing result.
FPGA (Field Programmable Gate Array, field programmable gate array) is led to based on concurrent operation
Hardware description language is crossed to realize, its integrated level is high, logic function is strong, flexibility is big and the speed of service is fast, wide at present
The general design applied to digital circuit.Carrying out position sensing in conjunction with FPGA has important research significance.
Summary of the invention
The purpose of the present invention is to provide one kind have it is untouchable, processing speed is fast, real-time is high, detection accuracy is high,
The positional detecting device and method of the advantages that at low cost.
The technical solution for realizing the aim of the invention is as follows: being detected based on more laser spot positions of line array CCD and FPGA
Device, including the storage of laser emitting module, ccd sensor module, FPGA signal processing module, data and transmission module and upper
Machine；
The laser emitting module, for Vertical Launch multi beam line laser to the surface of object to be measured；
The ccd sensor module for receiving the laser of object reflection to be measured, and carries out photoelectric conversion, completes light letter
Number acquisition and conversion；
The FPGA signal processing module, for carrying out pretreatment and modulus to the analog electrical signal after photoelectric conversion
Conversion, and realize more laser spot center positioning；
Data storage and transmission module, for storing the image data of FPGA signal processing module, and by more laser
Facula Center Location result is transmitted to host computer；
The host computer is sought each for obtaining the result data of FPGA signal processing module using laser triangulation
The corresponding location information of hot spot finally obtains the geological information of part to be measured and exports result.
More laser spot position detection methods based on line array CCD and FPGA, comprising the following steps:
Step 1, PC control laser emitting module Vertical Launch multi beam line laser to the surface of object to be measured；
Step 2, ccd sensor module acquire the laser of object reflection to be measured, and carry out photoelectric conversion；
Step 3, FPGA signal processing module amplify pretreatment and mould to the analog electrical signal after photoelectric conversion
Number conversion, and realize more laser spot center positioning, and data are transmitted to data storage and transmission module by treated；
More laser spot center positioning results are transmitted to host computer by step 4, FPGA signal processing module, host computer according to
Positioning result simultaneously seeks the corresponding location information of each hot spot using laser triangulation, finally obtains the geological information of part to be measured simultaneously
Export result.
Compared with prior art, the present invention its remarkable advantage are as follows: 1) laser emitting module uses laser line generator, with vertical
Mode emits multi beam line laser, the primary location information for obtaining multiple spot, mutual correction position detection as a result, greatly reducing face shape
The error of equal geological informations testing result, and it is by PC control, organically combines laser emitting module and other modules,
Improve automation, intelligence degree；2) processing of photosignal is completed based on FPGA, using the high speed performance of FPGA,
It is embedded in the location algorithm of more laser spot centers in FPGA, handles multiple spot signals, is quickly obtained the pixel position of each hot spot
Confidence breath, not only increases the speed of signal processing, and reduces the cost of signal processing module exploitation；3) with host computer
Communication is transmitted based on gigabit Ethernet, is substantially increased the transmission rate of data, is improved the real-time that detection device is shown；
4) measuring device is based on laser triangulation, and using multiple laser detection by the way of, may be implemented untouchable online real-time
Measurement, and precision is high.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is that the present invention is based on the structural block diagrams of more laser spot position detection devices of line array CCD and FPGA.
Fig. 2 is the working principle diagram of positional detecting device of the present invention.
Fig. 3 is the functional block diagram of Photoelectric Signal Processing of the present invention.
Fig. 4 is more laser spot center localization method flow charts based on FPGA signal processing.
Specific embodiment
In conjunction with Fig. 1, the present invention is based on more laser spot position detection devices of line array CCD and FPGA, including Laser emission
Module, ccd sensor module, FPGA signal processing module, data storage and transmission module and host computer；
Laser emitting module, for Vertical Launch multi beam line laser to the surface of object to be measured；
Ccd sensor module for receiving the laser of object reflection to be measured, and carries out photoelectric conversion, completes optical signal
Acquisition and conversion；
FPGA signal processing module, for carrying out pretreatment and modulus turn to the analog electrical signal after photoelectric conversion
It changes, and realizes more laser spot center positioning；
Data storage and transmission module, for storing the image data of FPGA signal processing module, and by more laser faculas
Centralized positioning result is transmitted to host computer；
Host computer seeks each hot spot using laser triangulation for obtaining the result data of FPGA signal processing module
Corresponding location information finally obtains the geological information of part to be measured and exports result.
It is further preferred that laser emitting module includes by being located at the N number of line laser in same level and being coaxially disposed
The laser array that device is constituted, and laser emitting module passes through PC control.
Further illustratively, laser line generator is controlled using the regulation technology of adaptive power of straining, and laser can basis
The feedback of line array CCD light spot received energy size, the output power of adaptive adjusting laser, to ensure that line array CCD receives
To the suitable facula information of energy.It thereby inhibits because light intensity is excessive or the satiety of too small ccd signal and/or too weak problem go out
It is existing.
It is further preferred that ccd sensor module includes the optical filter for avoiding veiling glare from entering set gradually, control exposure
Aperture diaphragm, optical lens and the linear CCD sensor of amount；And exist between optical lens and the axis of linear CCD sensor
So that ccd sensor module meets the angle theta of permanent focused light passages condition.
Further, FPGA signal processing module pre-processes the analog electrical signal after photoelectric conversion, specifically:
Processing is amplified to analog electrical signal using operational amplifier.
It is further preferred that data storage sends data to host computer with transmission module, specifically: it is based on Ethernet
PHY chip realizes network communication, and sends data to host computer by udp protocol and gigabit network interface.
In conjunction with Fig. 2, Fig. 3, the present invention is based on more laser spot position detection methods of line array CCD and FPGA, including it is following
Step:
Step 1, PC control laser emitting module Vertical Launch multi beam line laser to the surface of object to be measured；
Step 2, ccd sensor module acquire the laser of object reflection to be measured, and carry out photoelectric conversion；
Step 3, FPGA signal processing module amplify pretreatment and mould to the analog electrical signal after photoelectric conversion
Number conversion, and realize more laser spot center positioning, and data are transmitted to data storage and transmission module by treated；
More laser spot center positioning results are transmitted to host computer by step 4, FPGA signal processing module, host computer according to
Positioning result simultaneously seeks the corresponding location information of each hot spot using laser triangulation, finally obtains the geological information of part to be measured simultaneously
Export result.
Further, in conjunction with Fig. 4, FPGA realizes more laser spot centers positioning in step 3, specifically:
Step 3-1, digital signal is filtered；
Step 3-2, more laser faculas are split according to the peak value of filtered signal, obtain several single laser lights
Spot；
Step 3-3, the center of each laser facula is sought using centroid method.
It is exemplary preferably, in step 3-1 to filter specifically using mean filter method.
The present invention is based on the more laser spot position detection devices and method of line array CCD and FPGA, are surveyed based on laser triangulation
Amount technology is realized, by the way of multiple laser detection, and using FPGA as the main controller of ccd sensor module, has non-connect
Touching property, high sensitivity, high-precision, strong real-time and the advantages that high degree of automation, can satisfy industrial requirement, and at
This is low, structure is simple, has broad application prospects.
Claims (8)
1. a kind of more laser spot position detection devices based on line array CCD and FPGA, which is characterized in that including Laser emission mould
Block, ccd sensor module, FPGA signal processing module, data storage and transmission module and host computer；
The laser emitting module, for Vertical Launch multi beam line laser to the surface of object to be measured；
The ccd sensor module for receiving the laser of object reflection to be measured, and carries out photoelectric conversion, completes optical signal
Acquisition and conversion；
The FPGA signal processing module, for carrying out pretreatment and modulus turn to the analog electrical signal after photoelectric conversion
It changes, and realizes more laser spot center positioning；
Data storage and transmission module, for storing the image data of FPGA signal processing module, and by more laser faculas
Centralized positioning result is transmitted to host computer；
The host computer seeks each hot spot using laser triangulation for obtaining the result data of FPGA signal processing module
Corresponding location information finally obtains the geological information of part to be measured and exports result.
2. more laser spot position detection devices according to claim 1 based on line array CCD and FPGA, feature exist
In the laser emitting module includes by being located at the laser that in same level and N number of laser line generator of coaxial arrangement is constituted
Array, and laser emitting module passes through PC control.
3. more laser spot position detection devices according to claim 1 based on line array CCD and FPGA, feature exist
In the ccd sensor module includes the optical filter set gradually, aperture diaphragm, optical lens and linear CCD sensor；
And exist between optical lens and the axis of linear CCD sensor so that ccd sensor module meets the folder of permanent focused light passages condition
Angle θ.
4. more laser spot position detection devices according to claim 1 based on line array CCD and FPGA, feature exist
In, the FPGA signal processing module pre-processes the analog electrical signal after photoelectric conversion, specifically: it is put using operation
Big device amplifies processing to analog electrical signal.
5. more laser spot position detection devices according to claim 1 based on line array CCD and FPGA, feature exist
In, the data storage sends data to host computer with transmission module, specifically: network is realized based on ethernet PHY chip
Communication, and host computer is sent data to by udp protocol and gigabit network interface.
6. more laser spot position detection methods based on line array CCD and FPGA, which comprises the following steps:
Step 1, PC control laser emitting module Vertical Launch multi beam line laser to the surface of object to be measured；
Step 2, ccd sensor module acquire the laser of object reflection to be measured, and carry out photoelectric conversion；
Step 3, FPGA signal processing module amplifies pretreatment to the analog electrical signal after photoelectric conversion and modulus turns
It changes, and realizes more laser spot center positioning, and data are transmitted to data storage and transmission module by treated；
More laser spot center positioning results are transmitted to host computer by step 4, FPGA signal processing module, and host computer is according to positioning
As a result the corresponding location information of each hot spot and using laser triangulation is sought, finally obtains the geological information of part to be measured and output
As a result.
7. more laser spot position detection methods according to claim 6 based on line array CCD and FPGA, feature exist
In, FPGA described in step 3 realizes more laser spot center positioning, specifically:
Step 3-1, digital signal is filtered；
Step 3-2, more laser faculas are split according to the peak value of filtered signal, obtain several single laser faculas；
Step 3-3, the center of each laser facula is sought using centroid method.
8. more laser spot position detection methods according to claim 7 based on line array CCD and FPGA, feature exist
In filtering described in step 3-1 specifically uses mean filter method.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112737681A (en) * | 2020-12-31 | 2021-04-30 | 四川云盾光电科技有限公司 | Rotating mechanism non-contact communication method and device |
| CN113218306A (en) * | 2021-04-28 | 2021-08-06 | 大连理工大学 | FPGA-based light spot position detection system and method |
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2019
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| CN112737681A (en) * | 2020-12-31 | 2021-04-30 | 四川云盾光电科技有限公司 | Rotating mechanism non-contact communication method and device |
| CN113218306A (en) * | 2021-04-28 | 2021-08-06 | 大连理工大学 | FPGA-based light spot position detection system and method |
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Application publication date: 20191008 |