CN106871813A - Machine vision device and its embedded system and measuring method - Google Patents
Machine vision device and its embedded system and measuring method Download PDFInfo
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- CN106871813A CN106871813A CN201510922118.4A CN201510922118A CN106871813A CN 106871813 A CN106871813 A CN 106871813A CN 201510922118 A CN201510922118 A CN 201510922118A CN 106871813 A CN106871813 A CN 106871813A
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- embedded system
- processor
- camera head
- vcsel lasers
- measured
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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
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
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- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Studio Devices (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of machine vision device and its embedded system and measuring method,Wherein described machine vision device includes a VCSEL lasers,One camera head and an embedded system,The VCSEL lasers and the camera head are connected to the embedded system,Wherein described embedded system drives the VCSEL lasers to produce and projection one coded structured light a to object being measured by the way of inter-train pause carries out quick charge to the large bulk capacitance for being connected to the VCSEL lasers and in pulse width time carries out repid discharge to the electric capacity,Received by the camera head and be sent to the embedded system by least a portion coded structured light of the tested object reflection,To obtain the adjustment of the object being measured,So as to complete the measurement to the object being measured.
Description
Technical field
The present invention relates to field of machine vision, more particularly to a machine vision device and its embedded system and measurement
Method, wherein the embedded system includes a processor, the processor and the machine vision device
Connected by the programmable laser drive circuit of a pair of pulse constant current high current between VCSEL lasers, to ensure
The pulse efficiency and fluorescent lifetime of the coded structured light of the VCSEL lasers transmitting.
Background technology
In recent years, computer and its correlation technique achieve the development of formula of advancing by leaps and bounds, in particular for substituting people
The machine vision technique that work is measured in the operating environment of manual work or danger is not suitable for, in industry
Application in the every field such as production and daily life is more and more extensive.With speed and precision to e measurement technology
Requirement constantly improve, be currently based on Structure light method body surface three-dimensional measurement and reconstructing method be that machine is regarded
One of method being most widely used in feel.
For measure a light projection portion of the commonly provided interconnection of NI Vision Builder for Automated Inspection, an image capture portion with
And an image processing part.During measurement is performed to object being measured, by the light projection portion active real estate
Via the coded structured light formed after coding, coded structured light is being projected onto the table of object being measured for raw and projection
Reflected by its surface behind face, the image capture portion is translated into image after the coded structured light for being reflected is received
Signal is simultaneously sent to the image processing part, the image processing part according to the pixel distribution of the picture signal and brightness with
And the information such as color, the picture signal is converted into corresponding digital information, and the image processing part to this
Digitized image carries out computing and extracts clarification of objective, so as to complete the measurement to object being measured.Can manage
Solution, NI Vision Builder for Automated Inspection for measuring uses real-time during being measured to object being measured
The mode of ground acquisition monitoring, analysis and feedback is carried out, and the image processing part is for a large amount of and continuous image
Data flow carries out real-time processing to obtain corresponding information, therefore in the actual application of the NI Vision Builder for Automated Inspection
In, how to provide the image-capable and data analysis capabilities and data transmission capabilities of the image processing part is
Improve the key of its measurement efficiency and precision.
The content of the invention
It is an object of the present invention to provide a machine vision device and its embedded system and measuring method, its
Described in embedded system the image-capable and data of the machine vision device can be significantly increased
Analysis ability, and the embedded system additionally provides efficient memory bandwidth way to manage, by such
Mode, measurement efficiency and certainty of measurement when the machine vision device is applied to measurement can be guaranteed.
It is an object of the present invention to provide a machine vision device and its embedded system and measuring method, its
Described in embedded system include a processor, the VCSEL laser of the processor and the machine vision device
It is attached by the dipulse programmable laser drive circuit of constant current high current between device, by such side
Formula, ensure that the volume in machine vision device VCSEL lasers transmitting when for measurement process
The pulse frequency and fluorescent lifetime of code structure light.
It is an object of the present invention to provide a machine vision device and its embedded system and measuring method, its
In for connecting the VCSEL lasers and the laser drive circuit of the processor uses inter-train pause
Quick charge to large bulk capacitance and in pulse width time using the spy of electric capacity repid discharge and high-energy-density
Property, the problem of constant current high current and Precision trimming during Millisecond pulse can be efficiently solved, to ensure
State the reliability connected between VCSEL lasers and the processor.
It is an object of the present invention to provide a machine vision device and its embedded system and measuring method, its
Described in embedded system include a power supervisor, the power supervisor is connected to the processor to manage
Manage the energy consumption of all parts of the embedded system, thus the power supervisor can be effectively reduced it is described
, for the consume of electric energy, to cause the machine vision device more energy efficient, this is for portable for embedded system
The lifting of the endurance of the machine vision device is more effective.
It is an object of the present invention to provide a machine vision device and its embedded system and measuring method, its
Described in embedded system also include that multiple is connected to the interfaces of the processor, and each described interface with
Circuit between the processor is further optimized, and the data transmissions of the embedded system are improved according to this
Power.
In order to achieve the above object, the present invention provides the embedded system of a machine vision device, wherein the machine
Device sighting device includes a VCSEL lasers, wherein the embedded system includes a processor and with one
The programmable laser drive circuit of dipulse constant current high current, the VCSEL lasers are by the Laser Driven
Circuit is connected to the processor, wherein the laser drive circuit using inter-train pause to being located at the laser
The capacitor fast charging of drive circuit and the mode that the electric capacity carries out repid discharge is driven in pulse width time
The VCSEL lasers.
A preferred embodiment of the invention, the embedded system also includes a power supervisor and tool
Have a power management circuit, the power supervisor by the power management connection in the processor, and
And the power management circuit is separate with the laser drive circuit.
A preferred embodiment of the invention, the processor is a Myriad2 processors.
A preferred embodiment of the invention, the embedded system also includes multiple interfaces, wherein often
The individual interface is connected to the processor respectively.
A preferred embodiment of the invention, the interface be selected from MIPI TX connector interfaces,
MIPI interfaces, HDMI, the type group of USB interface composition.
According to another aspect of the present invention, the present invention also provides a machine vision device, and it includes：
One embedded system；
One VCSEL lasers；And
One camera head, wherein the VCSEL lasers and the camera head be connected to respectively it is described embedding
The processor of embedded system, wherein the coded structured light that the VCSEL lasers are produced is being projected
Reflected after to an object being measured, the camera head receives at least a portion coding structure for being reflected
Light obtains the image related to the object being measured to carry out photoelectric conversion, and described image is described by transmission
Processor.
According to another aspect of the present invention, the present invention also provides a measuring method, wherein the measuring method bag
Include following steps：
(a) by a VCSEL lasers produce via to light carry out encode formation a coding structure light projection
To an object being measured；
B () receives at least a portion coding structure reflected by the object being measured by a camera head
Light；And
C () is based on the spy of the content acquisition object being measured that the camera head feeds back by a processor
Levy；
Wherein in the step (a), the VCSEL lasers are used inter-train pause to being connected to
Stating the electric capacity of VCSEL lasers carries out quick charge and carries out repid discharge to the electric capacity in pulse width time
Mode operate, to produce and project the coded structured light.
A preferred embodiment of the invention, in the above-mentioned methods, by a pair of pulse constant current high current
Programmable laser drive circuit connects the VCSEL lasers and the processor.
A preferred embodiment of the invention, in the step (b), the camera head 30 will
The coded structured light for being received carries out photoelectric conversion, to obtain the image related to the object being measured,
And the processor that the camera head transmits described image.
A preferred embodiment of the invention, the VCSEL lasers and the camera head is adjacent
Near-earth is set, and the VCSEL lasers, formation between the camera head and the object being measured
Triangular structure.
A preferred embodiment of the invention, the processor is a Myriad2 processors.
Brief description of the drawings
Fig. 1 is the block diagram representation of the machine vision device of the preferred embodiment according to invention.
Fig. 2 is of the embedded system of the machine vision device of above preferred embodiment of the invention
Principle schematic.
Fig. 3 is the another of the embedded system of the machine vision device of above preferred embodiment of the invention
Individual principle schematic.
Fig. 4 is the stream of the measuring method of the utilization machine vision device of above preferred embodiment of the invention
Journey schematic diagram.
Specific embodiment
Hereinafter describe for disclosing the present invention so that those skilled in the art can realize the present invention.In below describing
Preferred embodiment be only used as citing, it may occur to persons skilled in the art that other obvious modifications.With
The general principle of the invention defined in lower description can apply to other embodiments, deformation program, improvement side
Case, equivalent and the other technologies scheme without departing from the spirit and scope of the present invention.
Fig. 1 of refer to the attached drawing, will be elucidated with according to the machine vision device of a preferred embodiment of the present invention.Institute
Stating machine vision device includes an embedded system 10, a VCSEL lasers 20 and a camera head 30,
The VCSEL lasers 20 and the camera head 30 are set are connected to the embedded system 10 respectively.
During the machine vision device is used for one object being measured 100 of measurement, the embedded system
A coded structured light to the quilt is formed after the 10 operation VCSEL lasers 20 are produced and projection is encoded
Measurement object 100, subsequently, the camera head 30 is received by the reflection of the object being measured 100 extremely
Few a part of coded structured light and to carry out photoelectric conversion related to the object being measured 100 to obtain
Image, and be further conveyed to for the image related to the object being measured 100 by the camera head 30
The embedded system 10 is analyzed and extracts feature, so as to complete the survey to the object being measured 100
Amount.
It is noted that the camera head 30 be it is any can be by receiving by the object being measured 100
The coded structured light of reflection and obtain the mechanism of the image related to the object being measured 100, for example exist
In this preferred embodiment of the invention, the camera head 30 be implemented as one include optical lens and
The camera module of sensitive chip, when the coded structured light is connect by the optical lens with by the sensitive chip
Time receiving, the sensitive chip is obtained in that in the image of the correlation of the object being measured 100 by photoelectric conversion.
As shown in Figures 2 and 3, the embedded system 10 further includes a processor 11 and with one
The programmable laser drive circuit 12 of dipulse constant current high current, the laser drive circuit 12 is set connection
In the processor 11 and the VCSEL lasers 20, and the laser drive circuit 12 uses pulse
Gap carries out quick charge and in pulse width time to the large bulk capacitance for being located at the laser drive circuit 12
The VCSEL lasers 20 are driven to produce and project the volume to the mode that the electric capacity carries out repid discharge
Code structure light, by such mode, the embedded system 10 of the invention can solve the problem that Millisecond pulse
The problem of period constant current high current and Precision trimming, thus ensure the VCSEL lasers 20 with it is described
The reliability of the connection between processor 11.In addition, the connection place that the laser drive circuit 12 is provided
Reason device 11 and the VCSEL lasers 20 connected mode ensure that the machine vision device by with
The VCSEL lasers 20 are produced and described in projecting during measure the object being measured 100
The pulse frequency and fluorescent lifetime of coded structured light, so as to improve measure the quilt by described and its sighting device
Measure the measurement efficiency and precision of object 100.In addition, those skilled in the art is, it is understood that this hair
Bright defined measurement not only includes measuring between the object being measured 100 and the machine vision device
Distance, and weight can be subsequently being carried out to it by measuring the surface characteristics of the object being measured 100
Structure.
It is noted that the programmable Laser Driven electricity of dipulse constant current high current that the present invention is defined
Road 12 is PWM (Pulse Width Modulation, pulsewidth modulation) circuit, and it is a kind of to analog signal
Level carries out digitally coded mode, so that by the laser drive circuit 12, the VCSEL lasers
20 can subsequently produce and project the coded structured light.
Relative to traditional processor, the processor 11 of the embedded system 10 of the invention has more
Strong data-handling capacity and more efficient memory bandwidth managerial ability, so that the processor 11 disclosure satisfy that
The machine vision device uses needs when the increasingly complex object being measured 100 is measured.For example exist
In a preferred embodiment of the invention, the processor 11 of the embedded system 10 of the invention can
To be a Myriad2 processors 11, wherein the Myriad2 processors 11 are an always online movements
Vision processor.
Further, the embedded system 100 includes a power supervisor 13 and with a power management line
Road 14, the power supervisor 13 is connected to the processor 11 by the power management circuit 14, and
The power management circuit 14 is further optimized, to enable the power supervisor 13 to of the invention
The all grade of processor as described 11 components of the embedded system 100 to electric energy consume situation carry out efficiently
Management, so that the embedded system 10 is more energy efficient, this is for improving the portable machine vision
It is particularly useful for device.Preferably, the power management circuit 14 and the laser drive circuit 12 it
Between be separate.
Further, the embedded system 10 also includes multiple interfaces 15,15 points of each described interface
It is not connected to the processor 11 independently, by interface 15 each described, the embedded system 10 permits
Perhaps more equipment are integrated, for example in one embodiment of the invention, the machine vision device it is described
Camera head 30 is integrated into the embedded system 10 by interface one of them described 15.Also
It is to say, the embedded system 10 of the invention is a main part of the machine vision device, it is permitted
Perhaps the integrated equipment that difference in functionality can be provided of needs is used according to different.
The type of the interface 15 can be chosen and provide, such as in described interface 15 is allowed by reality
It is MIPI TX connector interfaces 15 to apply, and for use as signal input interface, and is implemented as the MIPI
The interface 15 of TX connector interfaces 15 can make the MIPI signals on up to 6 tunnels while being input to institute
In stating processor 12, signal after being processed by the processor 12 also can by interface 15 each described,
For example connect by being implemented as the interface of the MIPI TX connector interfaces 15 or be implemented as HDMI
Mouthful or be implemented as the interface 15 of USB interface and export, it is provided as needed.May be appreciated
Be, the type of the interface 15 be selected from MIPI TX connector interfaces, MIPI interfaces, HDMI,
The type group of USB interface composition.
As shown in figure 4, the present invention also provides a measuring method 400, wherein the measuring method 400 is included such as
Lower step：
Step 401, (a) by a VCSEL lasers 20 produce via to light carry out encode formation a volume
Code project structured light is to an object being measured 100；
Step 402, (b) receives at least a portion reflected by the object being measured by a camera head 30
The coded structured light；And
Step 403, (c) obtains institute by a processor 11 based on the content that the camera head 30 feeds back
State the feature of object being measured 100.
The VCSEL lasers 20 and the processor 11 are connected by the laser drive circuit 12, and
The laser drive circuit 12 is quickly filled using inter-train pause to the electric capacity for being located at the laser drive circuit 12
Electricity and drive the VCSEL lasers 20 to the mode that the electric capacity carries out repid discharge in pulse width time.
Further, in the step (b), the coding structure that the camera head 30 will be received
Light carries out photoelectric conversion, to obtain the image related to the object being measured 100, and the camera head
Described image is sent to the processor 11 by 30, so that in the step (c), the processor 11
It is analyzed after the described image related to the object being measured 100 is obtained and extracts described tested
The feature of object 100 is measured, so as to complete the measurement to the object being measured 100.
It should be understood by those skilled in the art that the embodiments of the invention shown in foregoing description and accompanying drawing are only used as
Illustrate and be not intended to limit the present invention.The purpose of the present invention completely and is effectively realized.Function of the invention and
Structural principle shows and illustrates in embodiment, under without departing from the principle, embodiments of the present invention
Can there are any deformation or modification.
Claims (12)
1. the embedded system of a machine vision device, wherein the machine vision device includes a VCSEL lasers, its
It is characterised by, the embedded system includes a processor and with the programmable Laser Driven electricity of a pair of pulse constant current high current
Road, the VCSEL lasers are connected to the processor by the laser drive circuit, wherein the laser drive circuit
Using inter-train pause to being located at the capacitor fast charging of the laser drive circuit and in pulse width time the electric capacity being entered
The mode of row repid discharge drives the VCSEL lasers.
2. embedded system according to claim 1, also including a power supervisor and with a power management circuit,
The power supervisor is swashed in the processor, and the power management circuit by the power management connection with described
Light drive circuit is separate.
3. the embedded system according to right 1 or 2, wherein the processor is a Myriad2 processors.
4. embedded system according to claim 1 and 2, also including multiple interfaces, wherein each described interface point
The processor is not connected to.
5. embedded system according to claim 3, also including multiple interfaces, wherein each described interface respectively by
It is connected to the processor.
6. embedded system according to claim 5, wherein the interface be selected from MIPI TX connector interfaces,
MIPI interfaces, HDMI, the type group of USB interface composition.
7. a machine vision device, it is characterised in that including：
One according to any one described embedded system in claim 1 to 6；
One VCSEL lasers；And
One camera head, wherein the VCSEL lasers and the camera head are connected to the embedded system respectively
The processor, wherein the VCSEL lasers produce a coded structured light after an object being measured is projected onto
Reflected, the camera head receives at least a portion coded structured light for being reflected to carry out photoelectric conversion so as to obtain
The image related to the object being measured, described image is transmitted the processor.
8. a measuring method, it is characterised in that the measuring method comprises the following steps：
(a) by a VCSEL lasers produce via to light carry out encode formation a coded structured light project a quilt
Measurement object；
B () receives at least a portion coded structured light reflected by the object being measured by a camera head；And
C () is based on the feature of the content acquisition object being measured that the camera head feeds back by a processor；
Wherein in the step (a), the VCSEL lasers are used inter-train pause to being connected to the VCSEL
The electric capacity of laser carries out quick charge and the mode that the electric capacity carries out repid discharge is operated in pulse width time, to produce
With the projection coded structured light.
9. measuring method according to claim 8, wherein in the above-mentioned methods, by a pair of pulse constant current high current
Programmable laser drive circuit connects the VCSEL lasers and the processor.
10. measuring method according to claim 9, wherein in the step (b), the camera head 30 will
The coded structured light for being received carries out photoelectric conversion, to obtain the image related to the object being measured and described
The processor that camera head transmits described image.
11. according to any described measuring method in claim 8,9 or 10, wherein by the VCSEL lasers and
The camera head is neighboringly set, and the VCSEL lasers, the camera head and the object being measured it
Between form triangular structure.
12. measuring methods according to claim 11, wherein the processor is a Myriad2 processors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510922118.4A CN106871813A (en) | 2015-12-11 | 2015-12-11 | Machine vision device and its embedded system and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510922118.4A CN106871813A (en) | 2015-12-11 | 2015-12-11 | Machine vision device and its embedded system and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106871813A true CN106871813A (en) | 2017-06-20 |
Family
ID=59177396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510922118.4A Pending CN106871813A (en) | 2015-12-11 | 2015-12-11 | Machine vision device and its embedded system and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106871813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224320A (en) * | 2020-04-21 | 2020-06-02 | 常州纵慧芯光半导体科技有限公司 | Laser chip and manufacturing method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545890A (en) * | 2013-10-29 | 2014-01-29 | 荆丙礼 | Super-capacitance high-energy pulse source based on embedded microcontroller |
| CN104247178A (en) * | 2012-03-01 | 2014-12-24 | Iee国际电子工程股份公司 | Spatially coded structured light generator |
-
2015
- 2015-12-11 CN CN201510922118.4A patent/CN106871813A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104247178A (en) * | 2012-03-01 | 2014-12-24 | Iee国际电子工程股份公司 | Spatially coded structured light generator |
| CN103545890A (en) * | 2013-10-29 | 2014-01-29 | 荆丙礼 | Super-capacitance high-energy pulse source based on embedded microcontroller |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224320A (en) * | 2020-04-21 | 2020-06-02 | 常州纵慧芯光半导体科技有限公司 | Laser chip and manufacturing method and application thereof |
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Application publication date: 20170620 |
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