CN208620994U

CN208620994U - A kind of laser displacement sensor

Info

Publication number: CN208620994U
Application number: CN201821372541.7U
Authority: CN
Inventors: 王鹏
Original assignee: Hangzhou Whole Bridge Electric Co Ltd
Current assignee: Hangzhou Whole Bridge Electric Co Ltd
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2019-03-19
Anticipated expiration: 2028-08-24

Abstract

The utility model provides a kind of laser displacement sensor, including mode of laser group, optical imagery mould group, CCD mould group, dsp processor and MCU control module；Mode of laser group, for issuing laser signal；Optical imagery mould group, for the laser facula of testee surface reflection to be formed image in CCD mould group；Dsp processor is converted to digital signal for output pulse signal driving CCD mould group and by the analog signal that CCD mould group exports, and dsp processor is also used to carry out operation using function to digital signal, obtains measurement distance；MCU control module is compared for that will measure distance with predetermined target value, realizes the control to testee according to the driver of logical signal control testee according to comparison result output logic signal；The laser displacement sensor directly controls the movement of testee, or the movement of the logical signal control testee using input by the logical signal that MCU control module exports, and realizes the high-precision control to testee.

Description

A kind of laser displacement sensor

Technical field

The utility model relates to sensor technical fields, more particularly, to a kind of laser displacement sensor.

Background technique

Laser displacement sensor is tested to calculate by the change in location of detection 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 output, the output of 4-20mA electric current, RS485 With the synchrodatas transmission mode such as SSI, wherein the data of 0-10V voltage output mode and the output of the 4-20mA electric current way of output Precision is lower, 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, reading using RS485 communication interface, MODBUS communication protocol and 19200 baud rate One 32 bit value completes a communication process and most needs 15 milliseconds fastly, 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 guaranteed 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.

Utility model content

The purpose of this utility model is to provide a kind of laser displacement sensors, solve existing laser displacement sensor benefit The signal exported with way of outputs such as voltage, electric currents, controls the not high problem of the mobile bring accuracy of testee, passes through The logical signal of MCU control module output directly controls the movement of testee, or controls quilt using the logical signal of input The movement for surveying object, realizes the high-precision control to testee.

To achieve the above object, the utility model provides a kind of laser displacement sensor, comprising: mode of laser group, optics Imaging modules, CCD mould group, dsp processor and MCU control module；

Mode of laser group, for issuing laser signal；Optical imagery mould group, for by the laser light of testee surface reflection Spot forms image in CCD mould group；What dsp processor was exported for output pulse signal driving CCD mould group and by CCD mould group Analog signal is converted to digital signal, and dsp processor is also used 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, according to the driver of logical signal control testee, realize the control to testee.

Preferably, the laser displacement sensor further includes power module, the power module and mode of laser group, CCD mould Group, dsp processor and MCU control module connection.

Preferably, the MCU control module is also used to connect logical signal input interface, inputs 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 bracket, the mode of laser group, light are provided in shell It learns imaging modules and CCD mould group is rack-mount.

Preferably, the power of the mode of laser group is automatic adjustment.

Preferably, LED display panel and key module are provided on the shell, the LED display panel is for showing Laser displacement sensor measurement distance and parameter information, the key module for realizing parameter setting.

Preferably, the key module is provided with 4 keys, be respectively used to realize parameter value increase, reduce, exit and Confirm function.

The utility model compared with prior art, has the following advantages and outstanding effects:

Laser displacement sensor provided by the utility model passes through measured value that MCU control module is calculated and default Target value be compared, according to comparison result output logic signal, then the logical signal according to output is directly to measured object The driver of body is controlled, and the high accuracy positioning control to testee is realized.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of schematic illustration of laser displacement sensor provided by the embodiment of the utility model；

Fig. 2 is a kind of interactive interface schematic diagram of laser displacement sensor provided by the embodiment of the utility model；

Fig. 3 is a kind of internal structure cross-sectional view of laser displacement sensor provided by the embodiment of the utility model.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As shown in Figure 1, the utility model embodiment discloses a kind of laser displacement sensor, including mode of laser group 101, light Learn imaging modules 102, CCD (charge coupled device, charge-coupled device) mould group 103, DSP (digital Signal processing, Digital Signal Processing) processor 104, MCU (microcontroller unit, micro-control unit) Control module 105 and power module 106；Mode of laser group 101 is for issuing laser signal, the laser that mode of laser group 101 issues Signal directive testee surface, after testee reflects, reflected light is by optical imagery mould group 102 in CCD mould group 103 Clearly image, optical imagery mould group 102 are arranged on the reflected light path of testee for upper formation.Power module 106 and laser Mould group 101, CCD mould group 103, dsp processor 104 and MCU control module 105 connect.In the present embodiment, mode of laser group 101 The diameter for issuing laser is 1mm, and in other embodiments, the transmission power of mode of laser group 101, which can according to need, to be configured.

The analog signals that CCD mould group 103 exports are converted to number by processing such as digital filterings by dsp processor 104 Then signal is calculated the digital signal using function, obtains the distance between testee and laser displacement sensor. The focal length of optical imagery mould group 102 can according to need and change, and can thus obtain different measurement range and precision；DSP It is that CCD mould group 103 provides 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 with 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, the switch logic signals of output make measured object when the measurement of testee distance is less than target value set by user The direction that body becomes larger to distance moves；When the measurement distance of testee is greater than the target value of user's input, 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 mode includes but is not limited to question and answer communication mode and synchronous communication mode；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 interface, 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 also can according to need using interfaces such as RS-232 or RS-422.

As shown in Fig. 2, the utility model embodiment also discloses the interactive interface on the shell of laser displacement sensor, it should It include LED display panel 201 and key module 202 in interactive interface, wherein LED display panel 201 is for showing laser position The operating parameter information of displacement sensor and the distance measured, wherein operating parameter information includes but is not limited to electronic shutter, baud The information such as rate and communication protocol type, communication protocol type include but is not limited to MODBUS, PROFBUS and custom protocol. Key module 202 includes that four keys respectively correspond increase, reduce, exit and confirm function for realizing parameter setting function Can, it is configured when facilitating user's measurement.When it is implemented, key module 202 can also realize composite-key function, than Such as, when while pressing increasing key and acknowledgement key, LED display panel 201 will show main interface, that is, show all running parameters Information；When pressing increasing key and ESC Escape simultaneously, LED display panel 201 will show measurement range information.

As shown in figure 3, laser displacement sensor disclosed in the utility model embodiment further includes having shell 301, shell 301 It is inside provided with bracket 302, in the present embodiment, bracket 302 is fixed by screws in shell 301, and this structure is removable It unloads.Mode of laser group 101, optical imagery mould group 102 and CCD mould group 103 are mounted on bracket 302 by screw, this Housing interior structure is convenient for the assembly and calibration in laser displacement sensor manufacturing process.

A kind of laser displacement sensor, realizes and directly calculates dsp processor disclosed in the utility model embodiment To measurement distance results be sent to MCU control module carry out logical comparison, or according to logical signal input interface acquisition patrol Signal is collected, the problem of data precision caused by traditional mode signal output is lost is avoided, it is straight to the driver of testee Row control is tapped into, and then realizes the high accuracy positioning control to testee.

Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model Utility model, all any modification, equivalent substitution, improvement and etc. within the principle of the utility model, done should be included in this Within the protection scope of utility model.

Claims

1. a kind of laser displacement sensor characterized by comprising mode of laser group, optical imagery mould group, CCD mould group, at DSP Manage device and MCU control module；

Mode of laser group, for issuing laser signal；Optical imagery mould group, for the laser facula of testee surface reflection to exist Image is formed in CCD mould group；Simulation of the dsp processor for output pulse signal driving CCD mould group and exporting CCD mould group Signal is converted to digital signal, and dsp processor is also used to carry out operation using function to the digital signal, obtain measurement 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, according to the driver of logical signal control testee, realize 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 mode of laser group, CCD mould group, 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 also used to connect Logical signal input interface is connect, the logical signal control MCU control module according to logical signal input interface input is led to The sampling configuration of news mode 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 bracket in shell, and the mode of laser group, optical imagery mould group and CCD mould group are rack-mount.

5. a kind of laser displacement sensor as described in claim 1, which is characterized in that the power of the mode of laser group 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 module, the LED display panel are used to show the measurement distance and parameter information of laser displacement sensor, institute Key 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 module be provided with 4 by Key is respectively used to realize the increase of parameter value, reduces, exits and confirm function.