CN108801159A - A kind of laser displacement sensor - Google Patents
A kind of laser displacement sensor Download PDFInfo
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- CN108801159A CN108801159A CN201810973495.4A CN201810973495A CN108801159A CN 108801159 A CN108801159 A CN 108801159A CN 201810973495 A CN201810973495 A CN 201810973495A CN 108801159 A CN108801159 A CN 108801159A
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- module
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- displacement sensor
- laser displacement
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims 1
- 230000006854 communication Effects 0.000 description 17
- 238000004891 communication Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- 238000001514 detection method Methods 0.000 description 2
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- 238000003825 pressing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
The present invention provides a kind of laser displacement sensors, including laser module, optical imagery module, CCD modules, dsp processor and MCU control module；Laser module, for sending out laser signal；Optical imagery module, for the laser facula of testee surface reflection to be formed image on CCD modules；Dsp processor is converted to digital signal for output pulse signal driving CCD modules and by the analog signal that CCD modules export, and dsp processor is additionally operable to carry out operation using function to digital signal, obtains measurement distance；MCU control module realizes the control to testee for measurement distance to be compared with predetermined target value, according to comparison result output logic signal according to the driver of logical signal control testee；The laser displacement sensor directly controls the movement of testee by the logical signal that MCU control module exports, or the movement of testee is controlled using the logical signal of input, realizes the high-precision control to testee.
Description
Technical field
The present invention relates to sensor technical fields, more particularly, to a kind of laser displacement sensor.
Background technology
Laser displacement sensor is tested to calculate by detecting the change in location of laser facula on the image sensor
The change in location of object, mainly for detection of the measurement of the geometric senses such as the displacement of object, thickness, vibration and diameter.
In detection process, laser displacement sensor is handled by analogy and digital circuit, and passes through microprocessor analysis, meter
Corresponding output valve is calculated, in analog quantity window set by user, outputting standard data-signal in proportion.Common data letter
Number way of output generally includes communications interface transmissions mode and the SPI such as 0-10V voltage outputs, the output of 4-20mA electric currents, RS485
With the synchrodatas transmission mode such as SSI, wherein the data of 0-10V voltage outputs mode and the output of the 4-20mA electric current way of outputs
Precision is relatively low, although the data precision that the communications interface transmissions mode such as RS485, RS232 and RS422 exports is higher, data
Refresh rate is slow, for example, using RS485 communication interfaces, MODBUS communication protocols and 19200 baud rate, reads
One 32 bit value completes a communication process and most needs 15 milliseconds soon, this results in real-time very poor.
In addition, existing PLC controller is largely without the synchronous communication interfaces such as integrated SPI, SSI, the communication protocols of use
View is not standard agreement type, and existing PLC controller is caused not to be adapted to the synchrodatas transmission mode such as SPI and SSI generally, system
The about use scope of laser displacement sensor.So high-precision can be ensured by how designing one kind, and realize to measured object
The laser displacement sensor that body accurately controls in real time becomes the main problem faced at present.
Invention content
The purpose of the present invention is to provide a kind of laser displacement sensors, solve existing laser displacement sensor using electricity
The signal of the way of outputs such as pressure, electric current output controls the not high problem of accuracy that the movement of testee is brought, passes through MCU
The logical signal of control module output directly controls the movement of testee, or controls measured object using the logical signal of input
The movement of body realizes the high-precision control to testee.
To achieve the above object, the present invention provides a kind of laser displacement sensors, including：Laser module, optical imagery
Module, CCD modules, dsp processor and MCU control module；
Laser module, for sending out laser signal；Optical imagery module is used for the laser light of testee surface reflection
Spot forms image on CCD modules；Dsp processor for output pulse signal driving CCD modules and exports CCD modules
Analog signal is converted to digital signal, and dsp processor is additionally operable to carry out operation using function to the digital signal, be measured
Distance；MCU control module is for the measurement distance to be compared with predetermined target value, according to comparison result output logic letter
Number, the driver of testee is controlled according to the logical signal, realizes the control to testee.
Preferably, the laser displacement sensor further includes power module, the power module and laser module, CCD moulds
Group, dsp processor and MCU control module connection.
Preferably, the MCU control module is additionally operable to connection logical signal input interface, is inputted according to the logical signal
The communication mode of the logical signal control MCU control module of interface input or the sampling configuration of dsp processor.
Preferably, the laser displacement sensor further includes shell, and holder, the laser module, light are provided in shell
It learns imaging modules and CCD modules is rack-mount.
Preferably, the power of the laser module is automatic adjustment.
Preferably, LED display panel and key-press module are provided on the shell, the LED display panel is for showing
The measurement distance and parameter information of laser displacement sensor, the key-press module for realizing parameter setting.
Preferably, the key-press module is provided with 4 buttons, be respectively used to realize parameter value increase, reduce, exit and
Confirm function.
Compared with prior art, the present invention haing the following advantages and high-lighting effect：
Laser displacement sensor provided by the invention passes through the measured value that MCU control module is calculated and preset mesh
Scale value is compared, and according to comparison result output logic signal, then the logical signal according to output is directly to testee
Driver is controlled, and the high accuracy positioning control to testee is realized.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of principle schematic of laser displacement sensor provided in an embodiment of the present invention；
Fig. 2 is a kind of interactive interface schematic diagram of laser displacement sensor provided in an embodiment of the present invention；
Fig. 3 is a kind of internal structure sectional view of laser displacement sensor provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, the embodiment of the invention discloses a kind of laser displacement sensor, including laser module 101, optics at
As module 102, CCD (charge coupled device, charge coupling device) module 103, DSP (digital signal
Processing, Digital Signal Processing) processor 104, MCU (microcontroller unit, micro-control unit) control mould
Block 105 and power module 106；Laser module 101 for sending out laser signal, penetrate by the laser signal that laser module 101 is sent out
To testee surface, after testee reflects, reflected light is formed by optical imagery module 102 on CCD modules 103
Clearly image, optical imagery module 102 are arranged on the reflected light path of testee.Power module 106 and laser module
101, CCD modules 103, dsp processor 104 and MCU control module 105 connect.In the present embodiment, laser module 101 is sent out
The diameter of laser is 1mm, and in other embodiments, the transmission power of laser module 101 can be configured as needed.
The analog signals that CCD modules 103 export are converted to number by dsp processor 104 by processing such as digital filterings
Then signal is calculated the digital signal using function, obtains the distance between testee and laser displacement sensor.
The focal length of optical imagery module 102 can vary depending on, and can thus obtain different measurement range and precision；DSP
It is that CCD modules 103 provide driving that processor 104, which goes back output pulse signal,.
The mesh that MCU control module 105 inputs the measurement distance for the testee being calculated and user by host computer
Scale value is compared, and is controlled testee driver according to the corresponding logical signal of comparison result, is realized the control to testee
System.For example, when the measurement distance of testee is less than desired value set by user, the switch logic signals of output make measured object
The direction that body becomes larger to distance moves；When the measurement distance of testee is more than desired value input by user, the switch of output
The direction that logical signal makes testee become smaller to distance changes.
Laser displacement sensor disclosed in the present embodiment further includes logical signal input interface and serial communication interface, the logic
Signal input interface is connect with MCU control module 105, logic of the laser displacement sensor according to the input of logical signal input interface
Signal controls the communication mode of MCU control module 105 or the sampling configuration of dsp processor 104, and MCU control module 105 is led to
News pattern includes but not limited to question and answer communication mode and synchronous communication pattern；The sampling configuration of dsp processor 104 includes but unlimited
In continuous sampling and impulse sampling.In the present embodiment, serial communication interface uses RS-485 interfaces, is connected by serial communication interface
Position machine obtains high-precision numerical value, such as the numerical value of 16 precision or 32 precision, realizes to the straight of testee driver
Connect control.In other embodiments, serial communication interface can also use the interfaces such as RS-232 or RS-422 as needed.
As shown in Fig. 2, the embodiment of the invention also discloses the interactive interface on the shell of laser displacement sensor, the interaction
Include LED display panel 201 and key-press module 202 in interface, wherein LED display panel 201 is for showing that laser displacement passes
The operating parameter information of sensor and the distance measured, wherein operating parameter information include but not limited to electronic shutter, baud rate with
And the information such as communication protocol type, communication protocol type include but not limited to MODBUS, PROFBUS and custom protocol.Button
Module 202 includes four buttons, corresponding respectively to increase, reduce, exit and confirm function for realizing parameter setting function, side
User measure when be configured.When it is implemented, key-press module 202 can also realize composite-key function, for example, simultaneously
When pressing increasing key and acknowledgement key, LED display panel 201 will show main interface, that is, show all operating parameter informations；Together
When pressing increasing key and ESC Escape, LED display panel 201 will show measurement distance information.
As shown in figure 3, laser displacement sensor disclosed by the embodiments of the present invention further includes having shell 301, set in shell 301
It is equipped with holder 302, in the present embodiment, holder 302 is screwed in shell 301, and this structure is dismountable.
Laser module 101, optical imagery module 102 and CCD modules 103 are mounted on by screw on holder 302, in this shell
Portion's structure is convenient for assembly and calibration in laser displacement sensor manufacturing process.
A kind of laser displacement sensor disclosed by the embodiments of the present invention realizes and directly dsp processor is calculated
Measurement distance result is sent to MCU control module and carries out logical comparison, or obtains logic letter according to logical signal input interface
Number, the problem of data precision caused by avoiding traditional mode signal output is lost, to the driver of testee directly into
Row control, and then realize the high accuracy positioning control to testee.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the principle of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection scope of the present invention
Within.
Claims (7)
1. a kind of laser displacement sensor, which is characterized in that including：Laser module, optical imagery module, CCD modules, at DSP
Manage device and MCU control module；
Laser module, for sending out laser signal；Optical imagery module, for the laser facula of testee surface reflection to exist
Image is formed on CCD modules；Simulation of the dsp processor for output pulse signal driving CCD modules and exporting CCD modules
Signal is converted to digital signal, and dsp processor is additionally operable to carry out operation using function to the digital signal, obtain measure away from
From；MCU control module is for the measurement distance to be compared with predetermined target value, according to comparison result output logic letter
Number, the driver of testee is controlled according to the logical signal, realizes the control to testee.
2. a kind of laser displacement sensor as described in claim 1, which is characterized in that the laser displacement sensor further includes
Power module, the power module and laser module, CCD modules, dsp processor and MCU control module connect.
3. a kind of laser displacement sensor as described in claim 1, which is characterized in that the MCU control module is additionally operable to connect
Logical signal input interface is connect, the logical signal according to logical signal input interface input controls the logical of MCU control module
The sampling configuration of news pattern or dsp processor.
4. a kind of laser displacement sensor as described in claim 1, which is characterized in that the laser displacement sensor further includes
Shell is provided with holder in shell, and the laser module, optical imagery module and CCD modules are rack-mount.
5. a kind of laser displacement sensor as described in claim 1, which is characterized in that the power of the laser module is automatic
It adjusts.
6. a kind of laser displacement sensor as claimed in claim 4, which is characterized in that be provided with LED on the shell and show
Panel and key-press module, the LED display panel are used to show the measurement distance and parameter information of laser displacement sensor, institute
Key-press module is stated for realizing the setting of parameter.
7. a kind of laser displacement sensor as claimed in claim 6, which is characterized in that the key-press module be provided with 4 by
Key is respectively used to realize the increase of parameter value, reduces, exits and confirm function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973495.4A CN108801159A (en) | 2018-08-24 | 2018-08-24 | A kind of laser displacement sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973495.4A CN108801159A (en) | 2018-08-24 | 2018-08-24 | A kind of laser displacement sensor |
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| Publication Number | Publication Date |
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| CN108801159A true CN108801159A (en) | 2018-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810973495.4A Pending CN108801159A (en) | 2018-08-24 | 2018-08-24 | A kind of laser displacement sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707572A (en) * | 2020-07-10 | 2020-09-25 | 陕西航空电气有限责任公司 | Displacement calibration equipment |
| CN113970289A (en) * | 2020-07-22 | 2022-01-25 | 苏州优斯登物联网科技有限公司 | Monitoring system with digital sensor and monitoring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236081A (en) * | 2008-02-22 | 2008-08-06 | 济南大学 | Laser image and corresponding pixel distance measurement based displacement measuring device and method |
| CN201816214U (en) * | 2010-04-30 | 2011-05-04 | 西安工业大学 | Thickness on-line detection sensor used during plastic film preparation process with casting method |
| CN205972138U (en) * | 2016-08-19 | 2017-02-22 | 广东省自动化研究所 | High accuracy straight line labeller |
| CN106441112A (en) * | 2016-11-04 | 2017-02-22 | 杭州电子科技大学 | Range-variable laser trigonometry displacement measuring device and method |
| CN208620994U (en) * | 2018-08-24 | 2019-03-19 | 杭州全桥电气有限公司 | A kind of laser displacement sensor |
-
2018
- 2018-08-24 CN CN201810973495.4A patent/CN108801159A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236081A (en) * | 2008-02-22 | 2008-08-06 | 济南大学 | Laser image and corresponding pixel distance measurement based displacement measuring device and method |
| CN201816214U (en) * | 2010-04-30 | 2011-05-04 | 西安工业大学 | Thickness on-line detection sensor used during plastic film preparation process with casting method |
| CN205972138U (en) * | 2016-08-19 | 2017-02-22 | 广东省自动化研究所 | High accuracy straight line labeller |
| CN106441112A (en) * | 2016-11-04 | 2017-02-22 | 杭州电子科技大学 | Range-variable laser trigonometry displacement measuring device and method |
| CN208620994U (en) * | 2018-08-24 | 2019-03-19 | 杭州全桥电气有限公司 | A kind of laser displacement sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707572A (en) * | 2020-07-10 | 2020-09-25 | 陕西航空电气有限责任公司 | Displacement calibration equipment |
| CN113970289A (en) * | 2020-07-22 | 2022-01-25 | 苏州优斯登物联网科技有限公司 | Monitoring system with digital sensor and monitoring method |
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