CN110375644A - A kind of Portable hitting, which is carved characters, accords with the detection device and detection method of depth - Google Patents
A kind of Portable hitting, which is carved characters, accords with the detection device and detection method of depth Download PDFInfo
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- CN110375644A CN110375644A CN201910600776.XA CN201910600776A CN110375644A CN 110375644 A CN110375644 A CN 110375644A CN 201910600776 A CN201910600776 A CN 201910600776A CN 110375644 A CN110375644 A CN 110375644A
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- wordline laser
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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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- 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
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
-
- 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
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- 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
- G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
Abstract
It carves characters the invention discloses a kind of Portable hitting and accords with the detection device of depth, including mechanical cover main body, clamping device, idler wheel, display screen and laser triangulation optical path unit, the laser triangulation optical path unit includes a wordline laser device, reflecting mirror, camera lens and imaging sensor, optical filter is equipped between described image sensor and camera lens, the bottom of the mechanical cover main body is glass window.The invention also discloses it is a kind of beat to carve characters accord with the detection method of depth, first generate a trigger signal, then sample character surface 3D outline data, calculating character scan wheel profile represent character feature data, finally show character machining result.Detection device and detection method of the invention, it can be to depth or height, the non-contact complete detection of character boundary and adjacent character spacing progress for carving code character, the artificial detection cost during motor vehicle manufacture and annual test can be reduced, the technical issues of improving detection accuracy and detection efficiency, solving the puzzlement industry.
Description
Technical field
The present invention relates to technical field of vehicle manufacture, carve characters more particularly to a kind of Portable hitting and accord with the detection device of depth
And detection method.
Background technique
Traditional motor vehicle VIN code and motor number detection, mainly by artificial visual, some vehicle enterprises are used with probe
Dial gauge detects the depth of VIN code and motor number.Since the tip of probe has certain thickness, character itself cannot be detected
The depth of gully details, and need artificially to press in use, there are certain subjective factors for measurement result.Traditional detection
There are high labor costs for method, and inefficiency, quantified precision is poor, and there are subjectivities, are easy the problems such as slipping.As automobile is possessed
The workload of the increase of amount and sales volume, automotive manufacturers and vehicle annual test mechanism detection VIN code and motor number is also fast
Speed increases, and traditional mechanical detection mode does not adapt to market needs.
Summary of the invention
To solve problems of the prior art, it carves characters the present invention provides a kind of Portable hitting and accords with the detection dress of depth
It sets and detection method, detection device of the invention has portability, and using detection method of the invention, can fight each other the depth of symbol of carving characters
Degree or height, character boundary, adjacent character spacing carry out non-contact complete detection, improve the work quality of reviewer, mention
High working efficiency.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of Portable hitting, which is carved characters, accords with the detection device of depth, including mechanical cover main body, set on mechanical cover main body
Clamping device on the outer wall of side, the idler wheel set on mechanical cover bottom part body, the display list set on mechanical cover body top
Member and key, the laser triangulation optical path unit set on mechanical cover body interior, display unit includes display screen and one
Or multiple LED state indicator lights, display screen are touching display screen, key is used for the operation of system switching machine and function setting,
The laser triangulation optical path unit includes a wordline laser device, reflecting mirror, camera lens and the image of two two settings angled therebetween
Sensor, the optical path direction that a wordline laser device is emitted straight down, an and word direction of a wordline laser device
Vertical with the direction of motion of the idler wheel, the reflecting mirror is located at a wordline laser of a wordline laser device transmitting through object
On reflected light path after surface reflection, the camera lens is located on the reflected light path after reflecting mirror reflects, described image sensor
In the projecting light path by the camera lens, optical filter, the mechanical cover are equipped between described image sensor and camera lens
The bottom of main body is equipped with the glass window passed through for a wordline laser.
The inside of the mechanical cover main body is additionally provided with microprocessor, and the idler wheel is equipped with rotary encoder, the figure
As the signal output end of sensor connects the first signal input part of the microprocessor, the signal output of the rotary encoder
End connects the second signal input terminal of the microprocessor, and the first signal output end of the microprocessor connects a wordline
The signal input part of laser, the second signal output end of the microprocessor connect the signal input part of the display screen.
It further includes communication unit, power supply unit and reservoir that Portable hitting of the invention, which carves characters and accords with the detection device of depth,
The communication unit is network interface, bluetooth or serial communication interface, and the third signal output end connection of the microprocessor is described logical
The signal input part of unit is interrogated, the signal output end of communication unit connects the signal input part of extraneous printer or other hosts,
Character machining result can be sent to printer or other hosts by communication unit.
Power supply unit can support battery power supply and DC power supply power supply simultaneously, wherein the input voltage model of DC power supply power supply
It encloses for 12V~24V, is microprocessor, imaging sensor, rotary encoder and the power supply of a wordline laser device.
The signal input part of the reservoir connects the fourth signal output end of the microprocessor, passes for storing image
The data of sensor and rotary encoder.
The signal input part of the LED state indicator light connects the 5th signal output end of the microprocessor, and rotation is compiled
Code device often turns over certain angle, generates a trigger signal, causes previous frame image to be adopted due to too fast etc. wheel speeds
When sample does not complete, microprocessor judge current trigger signal be it is invalid, ignore the trigger signal, while outputing signal to LED shape
State indicator light is prompted.
The signal input part of the 6th signal output end connection described image sensor of the microprocessor.
The operation principle of the present invention is that: mechanical cover main body is pushed by clamping device, so that idler wheel is walked along character, is rolling
Rotary encoder is set on wheel, and for detecting the rotation angle of idler wheel, the minimum value of angle measurement resolution ratio is by following equation
It determines: smallest angular resolution: amin* 360 ° of=Δ L/ (π * d), wherein Δ L is minimum sweep span, preferably 0.05mm~
0.1mm, d are the diameter of main wheel.Rotary encoder often turns over certain angle, generates a trigger signal to microprocessor, micro- place
Reason device judges the validity of the trigger signal, specifically: lead to previous frame image sampling due to too fast etc. wheel speeds
Do not complete when, microprocessor judge current trigger signal be it is invalid, ignore the trigger signal, while outputing signal to LED state
Indicator light is prompted；When previous frame image sampling is completed, judge that current trigger signal is effective.Microprocessor receives
After effective trigger signal, an enabling signal can be exported and give a wordline laser device, starting a wordline laser device emits a wordline
Laser, meanwhile, an enabling signal is exported to imaging sensor, starts the image of imaging sensor detection a wordline laser scanning
Signal, specific light channel structure are as follows: a wordline laser of a wordline laser device transmitting is incident on character surface, anti-through character surface
Enter reflecting mirror after penetrating, is reflected into camera lens again, then project imaging sensor after optical filter, imaging sensor will test
To image information export to microprocessor, microprocessor handles the information, specific calculation processing mode are as follows: first
The straight line of the geometric jacquard patterning unit surface of each contour line representative is calculated using polynomial curve fitting algorithm and RANSAC curve fitting algorithm
Or polynomial curve, then according to the point on each contour line to the distance of the corresponding straight line of the contour line or polynomial curve,
Using character recognition algorithm, the character point cloud data for meeting character feature is extracted, finally, splicing character scan contour line extraction
Character point cloud data, depth, size and the spacing of calculating character.Later, microprocessor is by the depth for the character being calculated, ruler
Very little and spacing information is exported show to display screen, while being exported and being stored to reservoir, can also be by communication unit by character
Testing result is sent to printer or other hosts by communication unit.Detection device of the invention can be to the depth for carving code character
Or height, character boundary and adjacent character spacing carry out non-contact complete detection, can reduce motor vehicle manufacture and annual test
The technical issues of artificial detection cost in journey improves detection accuracy and detection efficiency, solves the puzzlement industry.
Preferably, the virtual image of mirror surface of the central axis at the place of a wordline laser device relative to the reflecting mirror,
The principal plane of the camera lens, the sensitized lithography of described image sensor are intersected in a bit, meet Scheimpflug condition, can be obtained
Obtain maximum Depth of field.
Preferably, the optical axis of a wordline laser device and a wordline laser of a wordline laser device transmitting are through body surface
The angle being reflected between the reflected light path of the reflecting mirror is preferably 20 °~50 °, and angle is too small, then the Measurement Resolution of z-axis
It is insufficient；Z-axis is excessive, then portion concave profile can be blocked, and influences the detection to character details.
Preferably, a wordline laser device is semiconductor laser, and a wordline of a wordline laser device transmitting swashs
The line width of light is 0.03mm~0.1mm, and ensures that the length of a wordline is greater than the height for the character to be detected.
Preferably, the optical filter is narrow band filter, and the bandwidth of the optical filter is 10nm~30nm.Narrow band filter
The light wave of a bit of wave-length coverage including optical maser wavelength is only allowed to pass through, the light wave of commplementary wave length is ended, so that sweeping
The result for retouching detection is more accurate.
Preferably, it when measuring character, to guarantee that measurement laser is steadily moved relative to character surface, reduces skew and trembles
The dynamic influence to measurement result, there are three the idler wheel settings, one of them is main wheel, and three idler wheels are outer with the machinery
Shell main body is detachably connected, conveniently replaced.
Preferably, the foreign steamer material of the main wheel is the material wear-resistant, force of rolling friction is big, and such as abrasive rubber plays
Anti-skidding effect.
Preferably, the clamping device is handle, and is detachably connected with the mechanical cover main body, conveniently replaced,
It is also conveniently installed on robot arm simultaneously.
Preferably, the idler wheel mechanism is easy to disassemble and replacement.
The present invention also provides a kind of carved characters using Portable hitting of the invention accord with depth detection device carry out beat carve characters
The method for according with depth detection, technical solution is:
It is a kind of beat to carve characters accord with the detection method of depth, comprising the following steps:
S1, reception generate trigger signal；
S2, the 3D outline data for sampling character surface；
The character feature data that S3, calculating character scan wheel profile represent；
S4, display character machining result；
S5, character machining result is sent to other equipment.
Preferably, step S1 specifically includes the following steps:
S11, rotary encoder often turn over certain angle, generate a trigger signal；
S12, trigger signal Effective judgement cause previous frame image sampling not complete due to too fast etc. wheel speeds
Cheng Shi, judge current trigger signal be it is invalid, ignore the trigger signal, while lighting LED state indicator light and being prompted；When upper
When one frame image sampling is completed, judge that current trigger signal is effective；
S13, receive effective trigger signal that rotary encoder transmits, and issued to a wordline laser device and imaging sensor
Enabling signal；
S14, starting a wordline laser device emit a wordline laser, while starting imaging sensor to a wordline laser profile
Image sampling.
Preferably, step S3 specifically includes the following steps:
S31, the straight line or polynomial curve for calculating the geometric jacquard patterning unit surface that each contour line represents, specifically can be used including multinomial
Formula curve fitting algorithm, RANSAC curve fitting algorithm；
S32, according to the point on each contour line to the distance of the corresponding straight line of the contour line or polynomial curve, extract symbol
Close the character point cloud data of character feature；
S33, the character point cloud data for splicing character scan contour line extraction；
S34, depth, size and the spacing for counting character.
Preferably, step S34 specifically includes the following steps:
S341, using character recognition algorithm, extract character zone；
S342, according to the boundary rectangle calculating character size of character and the spacing of intercharacter.
The beneficial effects of the present invention are:
1, detection device and detection method of the invention can not only measure beating to carve characters and according with depth for the recess such as motor number
Degree, can also measure the character height of protrusion, the scope of application is wider；And can with one-shot measurement character size, the data such as spacing,
It include simultaneously character identification function, measurement result is more acurrate, more comprehensively.
2, a wordline laser device uses semiconductor laser, and the line width of a wordline laser of a wordline laser device transmitting is
0.03mm~0.1mm, it is ensured that the length of a wordline is greater than the height for the character to be detected.
3, optical filter uses narrow band filter, and the bandwidth of optical filter is 10nm~30nm, narrow band filter only allow include
The light wave of a bit of wave-length coverage including optical maser wavelength passes through, and the light wave of commplementary wave length is ended, and reduces external interference,
It can also be used under strong light environment, so that the result of Scanning Detction is more accurate.
4, idler wheel and aid mechanism are detachably connected with mechanical cover main body, are convenient for changing.
5, portable design, it is flexible and convenient to use.
6, wireless telecommunications are supported, report can be will test and be sent directly to printer side, usage experience is good.
7, to sum up, detection device and detection method of the invention, can to carve code character depth or height, character boundary with
And adjacent character spacing carries out non-contact complete detection, can reduce artificial detection during motor vehicle manufacture and annual test at
The technical issues of this, improves detection accuracy and detection efficiency, solves the puzzlement industry.
Detailed description of the invention
Fig. 1 carves characters for Portable hitting described in the embodiment of the present invention and accords with the structural schematic diagram of the detection device of depth；
Fig. 2 is the light channel structure schematic diagram of laser triangulation optical path unit described in the embodiment of the present invention；
Fig. 3 carves characters for Portable hitting described in the embodiment of the present invention and accords with the perspective view of the detection device of depth；
Fig. 4 be the embodiment of the present invention described in Portable hitting carve characters accord with depth detection device detection when schematic diagram；
Fig. 5 is the control principle block diagram of the embodiment of the present invention；
Fig. 6 is the flow chart one that the detection method for according with depth of carving characters is beaten described in the embodiment of the present invention；
Fig. 7 is the flow chart for receiving or generating trigger signal described in the embodiment of the present invention；
Fig. 8 is the flow chart for the character feature data that calculating character scan wheel profile described in the embodiment of the present invention represents；
Fig. 9 is the flow chart of the depth, size and spacing of statistics character described in the embodiment of the present invention；
Figure 10 is to beat to carve characters described in the embodiment of the present invention to accord with the flowchart 2 of the detection method of depth.
Description of symbols:
101, mechanical cover main body；102, clamping device；103, idler wheel；104, display screen；105, LED state indicator light；
106, key；107, a wordline laser device；108, reflecting mirror；109, camera lens；110, imaging sensor；111, optical filter；112,
Rotary encoder；113, communication unit；114, power supply unit；115, reservoir；116, microprocessor；
L1, a wordline laser optical path；The projecting direction of L2, a wordline laser；L3, the laser wheel of projection on a surface of an
Profile；201, the mirror surface virtual image of the laser beam axis relative to reflective mirror；202, camera lens principal plane direction；203, imaging sensor is photosensitive
The direction in face；204, it beats to carve characters and accords with surface.
Specific embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
Embodiment:
As shown in fig. 1~fig. 5, a kind of Portable hitting, which is carved characters, accords with the detection device of depth, including mechanical cover main body 101,
Clamping device 102 on the side outer wall of mechanical cover main body 101, the idler wheel set on 101 bottom of mechanical cover main body
103, set on the display unit and key 106, the laser inside mechanical cover main body 101 at 101 top of mechanical cover main body
Triangulation optical path unit, display unit include display screen 104 and one or more LED state indicator lights 105, display screen 104
For the operation that touching display screen 104, key 106 are arranged for system switching machine and function, the laser triangulation optical path
Unit includes a wordline laser device 107, reflecting mirror 108, camera lens 109 and the imaging sensor 110 of two two settings angled therebetween, institute
State optical path direction that a wordline laser device 107 is emitted straight down, and a word direction of a wordline laser device 107 and institute
The direction of motion for stating idler wheel 103 is vertical, and the mirror surface of the reflecting mirror 108 is located at a word of a wordline laser device 107 transmitting
For line laser on the reflected light path after body surface reflects, the camera lens 109 is located at the reflected light path after the reflection of reflecting mirror 108
On, described image sensor 110 is set in the projecting light path by the camera lens 109, described image sensor 110 and camera lens
Optical filter 111 is equipped between 109, the bottom of the mechanical cover main body 101 is equipped with the glass window passed through for a wordline laser.
The inside of the mechanical cover main body 101 is additionally provided with microprocessor 116, and the idler wheel 103 is equipped with rotary coding
Device 112, the signal output end of described image sensor 110 connect the first signal input part of the microprocessor 116, the rotation
The signal output end for turning encoder 112 connects the second signal input terminal of the microprocessor 116, the microprocessor 116
First signal output end connects the signal input part of a wordline laser device 107, and the second signal of the microprocessor 116 is defeated
Outlet connects the signal input part of the display screen 104.
It further includes communication unit 113, power supply unit 114 and storage that Portable hitting of the invention, which carves characters and accords with the detection device of depth,
Storage 115, the communication unit 113 are network interface, bluetooth or serial communication interface, and the third signal of the microprocessor 116 is defeated
Outlet connects the signal input part of the communication unit 113, the signal output end of communication unit 113 connect extraneous printer or its
Character machining result can be sent to printer or other hosts by communication unit 113 by the signal input part of its host.
Power supply unit 114 can support battery power supply and DC power supply power supply simultaneously, wherein the input electricity of DC power supply power supply
Pressure range is 12V~24V, is that microprocessor 116, imaging sensor 110, rotary encoder 112 and a wordline laser device 107 supply
Electricity.
The signal input part of the reservoir 115 connects the fourth signal output end of the microprocessor 116, for storing
The data of imaging sensor 110 and rotary encoder 112.
The signal input part of the LED state indicator light 105 connects the 5th signal output end of the microprocessor 116,
Rotary encoder 112 often turns over certain angle, generates a trigger signal, causes when due to 103 excessive velocities of idler wheel etc.
When previous frame image sampling does not complete, microprocessor 116 judge current trigger signal be it is invalid, ignore the trigger signal, simultaneously
LED state indicator light 105 is outputed signal to be prompted.
The signal input part of the 6th signal output end connection described image sensor 110 of the microprocessor 116.
There are three the idler wheel 103 settings, and rear end is main wheel (can also front end be main wheel), and three idler wheels 103 with
The mechanical cover main body 101 is detachably connected, conveniently replaced.
The foreign steamer material of the main wheel is the material wear-resistant, force of rolling friction is big, and such as abrasive rubber plays anti-skidding work
With.
The clamping device 102 is handle, and is detachably connected with the mechanical cover main body 101, conveniently replaced.
The operation principle of the present invention is that: mechanical cover main body 101 is pushed by clamping device 102, makes idler wheel 103 along character
Rotary encoder 112 is arranged, for detecting the rotation angle of idler wheel 103, angle measurement resolution ratio in walking on idler wheel 103
Minimum value determined by following equation: smallest angular resolution: amin* 360 ° of=Δ L/ (π * d), wherein Δ L is between minimum scans
Away from preferably 0.05mm~0.1mm, d are the diameter of main wheel.Rotary encoder 112 often turns over certain angle, generates a triggering
Signal judges the validity of the trigger signal to microprocessor 116, microprocessor 116, specifically: when due to 103 speed of idler wheel
When the reasons such as too fast cause previous frame image sampling not complete, microprocessor 116 judge current trigger signal be it is invalid, ignore this
Trigger signal, while outputing signal to LED state indicator light 105 and being prompted；When previous frame image sampling is completed, judgement
Current trigger signal is effective.After microprocessor 116 receives effective trigger signal, an enabling signal can be exported to a word
Laser line generator 107, starting a wordline laser device 107 emit a wordline laser, meanwhile, an enabling signal is exported to image sensing
Device 110, starting imaging sensor 110 detect the picture signal of a wordline laser scanning, specific light channel structure are as follows: a wordline swashs
The a wordline laser that light device 107 emits is incident on character surface, and reflecting mirror 108, then secondary reflection are entered after character surface reflection
Into camera lens 109, then imaging sensor 110 is projected after optical filter 111, the image letter that imaging sensor 110 will test
Breath output is to microprocessor 116, and microprocessor 116 handles the information, specific calculation processing mode are as follows: use first
Polynomial curve fitting algorithm and RANSAC curve fitting algorithm calculate the straight line or more of the geometric jacquard patterning unit surface of each contour line representative
Item formula curve uses then according to the point on each contour line to the distance of the corresponding straight line of the contour line or polynomial curve
Character recognition algorithm extracts the character point cloud data for meeting character feature, finally, the character of splicing character scan contour line extraction
Point cloud data, depth, size and the spacing of calculating character.Later, microprocessor 116 is by the depth for the character being calculated, ruler
Very little and spacing information is exported to be shown to display screen 104, while output is stored to reservoir 115, can also be by communication unit
Character machining result is sent to printer or other hosts by communication unit 113 by 113.Detection device of the invention can be to quarter
The depth or height of code character, character boundary and adjacent character spacing carry out non-contact complete detection, can reduce motor vehicle
Artificial detection cost during manufacture and annual test improves detection accuracy and detection efficiency, and the technology for solving the puzzlement industry is asked
Topic.
In one of the embodiments, as shown in Fig. 2, the central axis at the place of a wordline laser device 107 is opposite
It is handed in the sensitized lithography of the virtual image of mirror surface of the reflecting mirror 108, the principal plane of the camera lens 109, described image sensor 110
It is compiled in a bit.
In one of the embodiments, as shown in Fig. 2, the optical axis of a wordline laser device 107 and a wordline laser device
107 transmitting a wordline lasers be reflected into through body surface the included angle A between the reflected light path of the reflecting mirror 108 be 20 °~
50°。
The a wordline laser device 107 is semiconductor laser, a wordline laser device in one of the embodiments,
The line width of a wordline laser of 107 transmittings is 0.03mm~0.1mm, it is ensured that the length of a wordline is greater than the height for the character to be detected
Degree.
The optical filter 111 is narrow band filter 111 in one of the embodiments, and the bandwidth of the optical filter 111 is
10nm~30nm.Narrow band filter 111 only allows the light wave of a bit of wave-length coverage including optical maser wavelength to pass through, remaining
The light wave of wavelength is ended, so that the result of Scanning Detction is more accurate.
As shown in fig. 6, it is a kind of beat to carve characters accord with the detection method of depth, comprising the following steps:
S1, reception generate trigger signal；
S2, the 3D outline data for sampling character surface；
The character feature data that S3, calculating character scan wheel profile represent；
S4, display character machining result；
S5, character machining result is sent to other equipment.
In one of the embodiments, as shown in fig. 7, step S1 specifically includes the following steps:
S11, rotary encoder 112 often turn over certain angle, generate a trigger signal；
S12, trigger signal Effective judgement, when leading to previous frame image sampling due to 103 excessive velocities of idler wheel etc.
Do not complete when, judge current trigger signal be it is invalid, ignore the trigger signal, while lighting LED state indicator light 105 and being mentioned
Show；When previous frame image sampling is completed, judge that current trigger signal is effective；
S13, receive effective trigger signal that rotary encoder 112 transmits, and to a wordline laser device 107 and image sensing
Device 110 issues enabling signal；
S14, starting a wordline laser device 107 emit a wordline laser, while starting imaging sensor 110 and swashing to a wordline
Halo exterior feature image sampling.
In one of the embodiments, as shown in figure 8, step S3 specifically includes the following steps:
S31, the straight line or polynomial curve for calculating the geometric jacquard patterning unit surface that each contour line represents, specifically can be used including multinomial
Formula curve fitting algorithm, RANSAC curve fitting algorithm；
S32, according to the point on each contour line to the distance of the corresponding straight line of the contour line or polynomial curve, extract symbol
Close the character point cloud data of character feature；
S33, the character point cloud data for splicing character scan contour line extraction；
S34, depth, size and the spacing for counting character.
In one of the embodiments, as shown in figure 9, step S34 specifically includes the following steps:
S341, using character recognition algorithm, extract character zone；
S342, according to the boundary rectangle calculating character size of character and the spacing of intercharacter.
In one of the embodiments, as shown in Figure 10, it is a kind of beat to carve characters accord with the detection method of depth, including following step
It is rapid:
S101, beginning, shifting roller 103 are pressed；
S102, the rotary encoder 112 synchronous with idler wheel 103 issue trigger signal at equal intervals；
S103, judge it is whether invalid from external trigger signal, if ignoring when previous frame image sampling does not complete
Current trigger signal, and LED state indicator light 105 is lighted, prompt trigger signal invalid or 103 excessive velocities of idler wheel；If triggering
Signal is effective, then enters step S104；
S104, it issues laser and samples character outline；
S105, extract current outline represent character point cloud data, by 104 interface display character point cloud of display screen into
Degree；
The beginning and end mark of S106, calculating character；
Whether the character that S107, judgement detect terminates, if terminating, enters step S108；If being not finished, under waiting
One trigger signal；
S108, calculating character, which are beaten, carves depth or height, size and the spacing with a upper character, is shown by 104 interface of display screen
Show character size calculating and recognition result.
A specific embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (9)
1. a kind of Portable hitting, which is carved characters, accords with the detection device of depth, which is characterized in that including mechanical cover main body, be set to outside mechanical
Clamping device on the side outer wall of shell main body, set on mechanical cover bottom part body idler wheel, be set to mechanical cover body top
Display screen and laser triangulation optical path unit set on mechanical cover body interior, the laser triangulation optical path unit
A wordline laser device, reflecting mirror, camera lens and imaging sensor including two two settings angled therebetween, a wordline laser device institute
Straight down, and a word direction of a wordline laser device is vertical with the direction of motion of the idler wheel for the optical path direction of transmitting,
The reflecting mirror is located at a wordline laser of a wordline laser device transmitting on the reflected light path after body surface reflects, institute
It states camera lens to be located on the reflected light path after reflecting mirror reflects, described image sensor is set to the projecting light path by the camera lens
On, optical filter is equipped between described image sensor and camera lens, the bottom of the mechanical cover main body is equipped with glass window；
The inside of the mechanical cover main body is additionally provided with microprocessor, and the idler wheel is equipped with rotary encoder, and described image passes
The signal output end of sensor connects the first signal input part of the microprocessor, and the signal output end of the rotary encoder connects
The second signal input terminal of the microprocessor is connect, the first signal output end of the microprocessor connects a wordline laser
The signal input part of device, the second signal output end of the microprocessor connect the signal input part of the display screen.
2. Portable hitting according to claim 1, which is carved characters, accords with the detection device of depth, which is characterized in that a wordline swashs
The central axis at the place of light device is passed relative to the virtual image of the mirror surface of the reflecting mirror, the principal plane of the camera lens, described image
The sensitized lithography of sensor is intersected in a bit.
3. Portable hitting according to claim 2, which is carved characters, accords with the detection device of depth, which is characterized in that a wordline swashs
The a wordline laser of optical axis and a wordline laser the device transmitting of light device is reflected into the reflected light path of the reflecting mirror through body surface
Between angle be 20 °~50 °.
4. Portable hitting according to claim 3, which is carved characters, accords with the detection device of depth, which is characterized in that a wordline swashs
Light device is semiconductor laser, and the line width of a wordline laser of a wordline laser device transmitting is 0.03mm~0.1mm.
5. Portable hitting according to claim 1, which is carved characters, accords with the detection device of depth, which is characterized in that the Portable hitting is carved
The detection device of character depth further includes communication unit, the communication unit be network interface, bluetooth or serial communication interface, it is described micro-
The third signal output end of processor connects the signal input part of the communication unit.
6. it is a kind of beat to carve characters accord with the detection method of depth, which comprises the following steps:
S1, reception generate trigger signal；
S2, the 3D outline data for sampling character surface；
The character feature data that S3, calculating character scan wheel profile represent；
S4, display character machining result.
7. it is according to claim 6 beat to carve characters accord with the detection method of depth, which is characterized in that step S1 specifically includes following
Step:
S11, rotary encoder often turn over certain angle, generate a trigger signal；
S12, trigger signal Effective judgement, when previous frame image sampling do not complete when, judge current trigger signal be it is invalid, suddenly
The slightly trigger signal；When previous frame image sampling is completed, judge that current trigger signal is effective；
S13, receive effective trigger signal that rotary encoder transmits, and issue starting to a wordline laser device and imaging sensor
Signal；
S14, starting a wordline laser device emit a wordline laser, while starting imaging sensor to a wordline laser contour images
Sampling.
8. it is according to claim 6 beat to carve characters accord with the detection method of depth, which is characterized in that step S3 specifically includes following
Step:
S31, the geometry table that the representative of each contour line is calculated using polynomial curve fitting algorithm and RANSAC curve fitting algorithm
The straight line or polynomial curve in face；
S32, according to the point on each contour line to the distance of the corresponding straight line of the contour line or polynomial curve, extract matching word
Accord with the character point cloud data of feature；
S33, the character point cloud data for splicing character scan contour line extraction；
S34, depth, size and the spacing for counting character.
9. it is according to claim 8 beat to carve characters accord with the detection method of depth, which is characterized in that step S34 specifically include with
Lower step:
S341, using character recognition algorithm, extract character zone；
S342, according to the boundary rectangle calculating character size of character and the spacing of intercharacter.
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