CN207395672U - A kind of hand-held gap, face difference vision measurement device - Google Patents
A kind of hand-held gap, face difference vision measurement device Download PDFInfo
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- CN207395672U CN207395672U CN201721814009.1U CN201721814009U CN207395672U CN 207395672 U CN207395672 U CN 207395672U CN 201721814009 U CN201721814009 U CN 201721814009U CN 207395672 U CN207395672 U CN 207395672U
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Abstract
The utility model discloses a kind of hand-held gap, face difference vision measurement devices, belong to automatic measurement technical field, which is characterized in that including handle（1）, display device（2）, gauge head（3）, measurement key（6）, the gauge head（3）Positioned at device front end, which is characterized in that the gauge head（3）Inside is equipped with laser conllinear on a pair of of horizontal level（4）The conllinear camera on a pair of of horizontal level（5）, the laser（4）And camera（5）To gauge head（3）Center has certain inclination angle, laser（4）Emit laser in line style, camera（5）Front end is equipped with optical filter, and the utility model utilizes structure light vision measuring principle, can realize the accurate measurement to workpiece gap, face difference, has the advantages that easy to operate, portable, measurement is quick.
Description
Technical field
The utility model is related to automatic measurement mechanism field, in particular to a kind of hand-held gap, face difference vision
Measuring device.
Background technology
In industry spot, it is contemplated that the reasons such as assembly technology, global design, beauty, in workpiece assembling process there is
Various gaps, face are poor, such as：Gap between arrangements for automotive doors and frame, appropriate gap can effectively reduce car door abnormal sound, vehicle
The problems such as door is worn, close door is laborious, meanwhile, in vehicle processing, assembling process, workpiece gap, face difference are indispensable
Therefore technique, spreads to entire industry assembling manufacture field, the gap of workpiece, face difference are the technologies related generally to, and gap
Whether distance meets design standard and is related to whole comfort, harmony, and also therefore the measurement means layer in gap, face difference is gone out
It is not poor.
Traditional measuring method often uses surveyors' staff, such as：Vernier caliper, micrometer, dial gauge etc., measurement take
Long, and due to the limitation of operating personnel's qualification, there are larger error, data are consistent for the gap of reading, face difference data
Property is poor.
The content of the invention
To solve the above-mentioned problems, the utility model integrated structure light three-dimensional measurement technology and binocular stereo vision principle,
Intelligent measuring is carried out to gap present in mechanical processing, assembling process, face difference, ensures to use while measurement accuracy portable
Formula designs, and facilitates easy to operate.
The utility model discloses a kind of hand-held gap, face difference vision measurement device, the present apparatus includes handle, display dress
It puts, gauge head, measurement key, the gauge head is located at device front end, is electrically connected with display device, and the display device is connected with handle,
The measurement key mapping is on handle, which is characterized in that laser conllinear on a pair of of horizontal level is equipped with inside the gauge head
The conllinear camera on a pair of of horizontal level, the laser and camera are tilted to head center position, and laser transmitting swashs
Light is in line style, and camera front end has optical filter；
As further improvement of the utility model, the laser and camera are tilted to head center position, are tilted
Angle value is preferably 30 °, compared to vertical shooting or single camera and the measured gap laser strip image of laser shooting, is used
The two groups of lasers in left and right and camera, and certain angle of inclination is set, the detailed information of more Multiple level, image information can be obtained
It is more complete.
The installation site of two lasers is conllinear in the horizontal direction, and the laser of transmitting is in line style, i.e. left and right position
The laser strip that is emitted of laser overlap；Camera front end is equipped with optical filter so that camera only gathers laser strip and is incident upon work
The image in part gap, i.e. the image collected are a laser strip projected image, exclude background interference.
Preferably, the handle is designed according to adult's hand size, may be provided for anti-skidding helicitic texture, before
It holds and measurement key is set at index finger location.
Preferably, the display device is preferably graphic control panel, has preferable anti-interference, existing suitable for industry
, measurement pattern can be selected by touch-screen, and it is capable of the gap of real-time display measured object or face difference, and be easy to observe.
The measurement key is used to control the unlatching of laser and camera, specifically, when pressing measurement key, laser and phase
Machine is in opening；After release, in closed state, electricity is saved.
The working distance foundation camera focus and laser works of the utility model device are away from depending on, in specific working distance
In the range of can accurately measure, it is too far or closely camera out-focus or laser strip insufficient strength etc. can be caused to ask very much apart from workpiece gap
Topic, has an impact measurement result, in order to more accurately weigh working distance in use, it is preferable that the gauge head is also equipped with
Working distance stent, length are standard working distance value, and the working distance number of holders is preferably two, and heteropleural is symmetrically placed.
The gauge head be detachable structure, replacement easy to repair.
For the ease of carrying, the present apparatus has chargeable module, after charging, can be used in using as detection terminal.
For above device, a kind of hand-held gap, face difference vision measuring method comprise the following steps：
A. master switch is opened, system initialization chooses measurement pattern, is directed at workpiece for measurement, presses measurement key control laser
Device is opened with camera；
B. left and right two cameras correspond to the image that shooting laser strip is incident upon on workpiece and send processor to；
C. processor carries out image procossing to two width laser strip images, extracts the light stripe centric line of laser strip image, passes through
Camera monocular and binocular calibration obtain the transformational relation between photo coordinate system and world coordinate system, carry out three-dimensional of image
Match somebody with somebody, by two width optical losses line images synthesis, one secondary pending image, according to transformational relation obtained by calibrating, obtain pending figure
The space three-dimensional point cloud coordinate of picture；；
D. processor chooses characteristic point in pending image, and according to its 3 d space coordinate information, calculates measured workpiece
Gap or face difference, and carry out interface display.
Measurement pattern has alternative in the step a, and measurement pattern includes intelligent measure pattern, clearance measurement mould
Formula, face difference measurements pattern, single-measurement pattern, group measurement pattern, system default carry out intelligent measure pattern, the intelligent measure
In pattern, according to the structure light image feature of acquisition, judge to calculate the gap width of measured workpiece or face difference, if in image simultaneously
There are gaps and face difference feature, then calculate the two and show；In addition, user can also be advance in step a according to actual needs
Choose clearance measurement pattern, face difference measurements pattern, single-measurement pattern, group measurement pattern；
Under the clearance measurement pattern, only calculate measured workpiece gap width and shown, likewise, poor in the face
Under measurement pattern, only calculate measured workpiece face difference and shown；Single-measurement pattern is suitable for user to multiple works to be measured
The same position of part is detected, and by testing result real-time display, while software can generate corresponding report, sentence convenient for user
The quality of disconnected batch workpiece；Group measurement pattern is detected multiple positions of a workpiece for measurement suitable for user, detection knot
The report of fruit real-time display, at this time Software Create can assist in the quality that user judges workpiece entirety.A variety of measurement patterns
It chooses so that user's operation is more simple and clear, and workpiece calibration has more specific aim, and testing result is more intuitively changed.
Clear-cut laser strip center line image in order to obtain, image processing algorithm is gone including image in the step c
It makes an uproar, the processing of binaryzation, sub-pix.
Wherein, in order to improve the accuracy of left and right camera synthesis, in the step c, by calibration, under unified coordinate system
Cloud data in the laser strip image that two cameras measure overlaps, and in order to improve synthesis precision, match point can choose multiple points,
Stereo matching, the synthesis of two images are carried out using coordinate information.
Characteristic point is chosen according to the fringe projection characteristics of image of workpiece for measurement in the step d, that is, chooses light stripe centric line
Gap most outer point, so-called gap refers to that workpiece leaves gap in the horizontal direction, therefore laser strip projects to gap
Occurred fracture when upper in the horizontal direction, non-continuous event, in the utility model measuring method, characteristic point selection is based on this
The phenomenon of rupture of sample finds the point at light stripe centric line breaking part most outer, carries out characteristic point three-dimensional coordinate analysis, similarly, institute
Meaning face difference refers to be uneven on the vertical direction of workpiece, and therefore, the image of laser strip projection is discontinuous in the vertical direction, special
Sign point is chosen here.
In conclusion the utility model compared in the prior art, has the advantages and positive effects of：
Using vision detection technology, a kind of portable intelligent device for measuring is devised, can be realized to workpiece gap
Measurement, at the same it is easy to operate, accuracy is high.
Description of the drawings
Fig. 1 is the structure chart of the utility model device；
Fig. 2 is the cut-away view of the utility model device probe part and the signal of the angle of inclination of laser and camera
Figure；
Fig. 3 is the utility model detection method flow chart；
Fig. 4 is one camera, laser acquisition image；
Fig. 5 be the utility model acquisition image and match point synthesis treat mapping；
Fig. 6 is the utility model calculated gap value, face difference process schematic.
In figure：Handle 1, display device 2, gauge head 3, laser 4, camera 5, measurement key 6, working distance stent 7.
Specific embodiment
The optical plane launched by laser is crossed to form feature striation with measured workpiece surface, and feature striation is being spatially located at
On optical plane, the characteristic image formed through perspective projection is located on the plane of delineation of camera, therefore, establishes optical plane and camera figure
The correspondence of image plane is the effective way for establishing line-structured light vision measurement model.
The utility model proposes a kind of hand-held gap, face difference vision measurement device, as shown in Figure 1, the present apparatus includes
Handle 1, display device 2, gauge head 3, measurement key 6, the gauge head 3 are located at device front end, and the gauge head 3 is located at device front end, with
Display device 2 is electrically connected, and the display device 2 is connected with handle 1, and the measurement key 6 is located on handle, and Fig. 2 is that this practicality is new
The cut-away view of type device probe part is equipped with laser 4 conllinear on a pair of of horizontal level inside gauge head 3 and a pair is same
Sample camera 5 conllinear on horizontal level；The laser 4 and camera 5 have certain inclination to 3 center of gauge head
Angle, Fig. 3 are the angle of inclination schematic diagrames of the utility model device laser and camera, as shown in the figure, laser 4 and camera 5 are equal
The inclination angle having to the center of gauge head 3 is 30 °, tested compared to what vertical shooting or single camera and laser were shot
Laser strip image, as shown in Figure 4；Using the two groups of lasers in left and right and camera, and certain angle of inclination is set, can be obtained more
More detailed information, image information is more complete, as Fig. 5 the utility model gathers the testing image signal of image and matching synthesis
Figure.
Fig. 3 is the utility model detection method flow chart, the utility model hand-held gap, face difference vision measuring method,
Comprise the following steps：
A. master switch is opened, system initialization chooses measurement pattern, is directed at workpiece for measurement, presses measurement key control laser
Device is opened with camera；
B. left and right two cameras correspond to the image that shooting laser strip is incident upon on workpiece and send processor to；
C. processor carries out image procossing to two width laser strip images, extracts the light stripe centric line of laser strip image, passes through
Camera monocular and binocular calibration obtain the transformational relation between photo coordinate system and world coordinate system, carry out three-dimensional of image
Match somebody with somebody, by two width optical losses line images synthesis, one secondary pending image, according to transformational relation obtained by calibrating, obtain pending figure
The space three-dimensional point cloud coordinate of picture；；
D. processor chooses characteristic point in pending image, and according to its 3 d space coordinate information, calculates measured workpiece
Gap or face difference, and carry out interface display.
Measurement pattern has alternative in the step a, and measurement pattern includes intelligent measure pattern, clearance measurement mould
Formula, face difference measurements pattern, single-measurement pattern, group measurement pattern, system default carry out intelligent measure pattern.
Since the original image of projection laser strip is relatively thick, profile is not clear enough, in order to obtain in clear-cut laser strip
Heart line image, image processing algorithm includes image denoising, binaryzation, sub-pix processing in the step c.
Wherein, in order to improve the accuracy of left and right camera synthesis, in the step c, by calibration, under unified coordinate system
Cloud data in the laser strip image that two cameras measure overlaps, and in order to improve synthesis precision, match point can choose multiple points,
Stereo matching, the synthesis of two images are carried out using coordinate information.
Characteristic point is chosen according to the fringe projection characteristics of image of workpiece for measurement in the step d, that is, chooses light stripe centric line
Gap most outer point.
The utility model embodiment can be specifically described as：Device handle 1 is grasped, master switch is opened and is powered, system
After initialization, needs are measured according to actual, one in following measurement pattern are chosen by display device 2, measurement pattern includes
Intelligent measure pattern, clearance measurement pattern, face difference measurements pattern, single-measurement pattern, group measurement pattern；If without selection
Acquiescence carries out intelligent measure pattern,
Present apparatus position is adjusted, is directed at workpiece for measurement, cooperating weighs the present apparatus to the optimal of workpiece for measurement away from stent 7
Working distance presses measurement key 6 and laser 4 is controlled to be opened with camera 5；The laser that laser 4 emits is in line style, and left and right two
The laser strip that laser is emitted overlaps, and 5 front end of camera is equipped with optical filter, therefore camera collecting line type laser strip is incident upon
Image in workpiece gap excludes background interference.
The handle 1 may be provided for anti-skidding helicitic texture according to adult's hand size design.
In the present embodiment, display device 2 is graphic control panel, has anti-interference, suitable for industry spot.
Measurement key 6 is located at the index finger location of handle front end, for controlling the unlatching of laser 4 and camera 5, specifically,
When pressing measurement key 6, laser 4 is in opening with camera 5；After release, in closed state, electricity is saved.
In the present embodiment, working distance stent 7 is arranged to two, and upper-lower position is placed, and makes measurement process more firm accurate；
Gauge head 3 be detachable structure, replacement easy to repair；For the ease of carrying, the present apparatus has chargeable module, can make in use
It is used for detection terminal.
Further, left and right two cameras correspond to shooting workpiece laser image and send processor to；
Further, processor carries out image procossing to original laser image, including image denoising, binaryzation, sub- picture
Element processing, extracts clear-cut laser strip center line image；By calibration, the laser that two cameras measure under unified coordinate system
Cloud data in image overlaps, and obtains the transformational relation between photo coordinate system and world coordinate system, processor from
It is corresponding in the image that left and right camera obtains to choose match point, as shown in figure 5, according to the coordinate position of match point, carry out left and right two
Width image Stereo matching, synthesis by one secondary pending image of two images synthesis, according to transformational relation obtained by calibrating, obtain
The space three-dimensional point cloud coordinate of pending image；
Further, processor chooses the characteristic point of pending image gap most outer, and according to the space three of the point
Dimension coordinate information calculates the gap of measured workpiece or face difference, and carries out interface display.Specifically, as shown in fig. 6, respectively
Make the parallel lines and vertical line of light stripe centric line, by calculating characteristic point to the distance of parallel lines, must appear difference；Calculate feature
Point draws gap width to the distance of vertical line.
The utility model integrated structure light three-dimensional measurement technology and binocular stereo vision principle devise a kind of portable
Intelligent device for measuring, can realize the measurement to workpiece gap, at the same it is easy to operate, accuracy is high.
Specific case used herein is set forth the principle and embodiment of the utility model, above example
Explanation be only intended to help to understand the method and its core concept of the utility model.It should be pointed out that for the art
For those of ordinary skill, on the premise of the utility model principle is not departed from, several change can also be carried out to the utility model
Into and modification, these improvement and modification are also fallen into the protection domain of the utility model claims.
Claims (6)
1. a kind of hand-held gap, face difference vision measurement device, which is characterized in that including handle（1）, display device（2）, gauge head
（3）, measurement key（6）, the gauge head（3）Positioned at device front end, with display device（2）Electrical connection, the display device and handle
（1）It is connected, the measurement key（6）It is installed on handle（1）On, the gauge head（3）Inside is equipped on a pair of of horizontal level collinearly
Laser（4）The conllinear camera on a pair of of horizontal level（5）, the laser（4）And camera（5）To gauge head（3）In
Heart position tilts, laser（4）Emit laser in line style, camera（5）Front end has optical filter.
2. a kind of hand-held gap according to claim 1, face difference vision measurement device, which is characterized in that the handle
（1）It is threaded structure.
3. a kind of hand-held gap according to claim 1, face difference vision measurement device, which is characterized in that the display
Device（2）For graphic control panel.
4. a kind of hand-held gap according to claim 1, face difference vision measurement device, which is characterized in that the gauge head
（3）It is also equipped with working distance stent（7）, the working distance stent（7）There are two, heteropleural installation.
5. a kind of hand-held gap according to claim 1, face difference vision measurement device, which is characterized in that the gauge head
（3）For detachable structure.
6. a kind of hand-held gap according to claim 1, face difference vision measurement device, which is characterized in that the laser
Device（4）And camera（5）To gauge head（3）Center inclination angle value is 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721814009.1U CN207395672U (en) | 2017-12-22 | 2017-12-22 | A kind of hand-held gap, face difference vision measurement device |
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| CN201721814009.1U CN207395672U (en) | 2017-12-22 | 2017-12-22 | A kind of hand-held gap, face difference vision measurement device |
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| CN207395672U true CN207395672U (en) | 2018-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107957247A (en) * | 2017-12-22 | 2018-04-24 | 易思维（天津）科技有限公司 | A kind of hand-held gap, face difference vision measurement device and method |
| CN111780683A (en) * | 2020-06-29 | 2020-10-16 | 易思维（杭州）科技有限公司 | Portable scanning system and method of use |
-
2017
- 2017-12-22 CN CN201721814009.1U patent/CN207395672U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107957247A (en) * | 2017-12-22 | 2018-04-24 | 易思维（天津）科技有限公司 | A kind of hand-held gap, face difference vision measurement device and method |
| CN107957247B (en) * | 2017-12-22 | 2023-09-08 | 易思维（天津）科技有限公司 | Handheld gap and surface difference vision measurement device and method |
| CN111780683A (en) * | 2020-06-29 | 2020-10-16 | 易思维（杭州）科技有限公司 | Portable scanning system and method of use |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Feng Weichang Inventor after: Guo Lei Inventor before: Feng Weichang Inventor before: Yin Shibin Inventor before: Guo Lei Inventor before: Guo Yin |