CN105203148B - A kind of visible detection method of automobile combination meter - Google Patents
A kind of visible detection method of automobile combination meter Download PDFInfo
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- CN105203148B CN105203148B CN201510634848.4A CN201510634848A CN105203148B CN 105203148 B CN105203148 B CN 105203148B CN 201510634848 A CN201510634848 A CN 201510634848A CN 105203148 B CN105203148 B CN 105203148B
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Abstract
The present invention discloses a kind of visible detection method of automobile combination meter, the detecting system of use includes meters under test, camera, PC and signal generator, signal generator is sent instructions to by PC, signal generator produces corresponding signal to meters under test, instrument is made a response, while PC control camera is taken pictures and obtains image, then judges whether instrument board is qualified by image procossing, characterized in that, the visible detection method comprises the steps：Drawing template establishment, carry out template matches during detection every time；One rectangle of parameter setting, the detection zone of each individual event is confined, the detection to control lamp is exactly that the gray value and tone value in region are confined by image procossing detection, and the detection to pointer is exactly to extract the RED sector in region, it is fitted in alignment, then calculates angle.Combination instrument is detected by machine vision, substantially reduces detection time, improves efficiency, substitutes human eye detection, more accurately.
Description
Technical field
The present invention relates to the detection method of automobile combination meter, more particularly to computer based automobile combination meter regards
Feel detection method.
Background technology
Automobile combination meter is the interactive interface of people and automobile, for driver provide needed for vehicle operating parameter, failure,
The information such as mileage, it is the essential part of each automobile.Instrument show it is directly perceived with it is attractive in appearance so that drive do not ride instead of walk still
It is required, also turn into the part comfortably lived, and the accurate and reliability of parameter transmission is then directly connected to running car
Safety.The domestic detection to automobile instrument at present also rests on the artificial detection stage, and artificial to judge that whether normal lamp is bright, pointer is
No deflection is in place.This determination methods are had a great influence by subjective factor, and error detection rate can be caused higher.
In view of this, it is necessary to a kind of visible detection method of automobile combination meter is provided, to solve the above problems.
The content of the invention
In order to overcome above-mentioned the shortcomings of the prior art, it is an object of the invention to provide a kind of automobile combination meter
Visible detection method, detection method of the invention is the mechanical vision inspection technology using computer and industrial camera, by right
After the collection analysis processing of image, corresponding measured value is provided, judges whether instrument board is qualified.
In order to achieve the above object, the technical solution adopted in the present invention is：A kind of vision-based detection of automobile combination meter
Method, the detecting system of use include meters under test, camera, PC and signal generator, and signal hair is sent instructions to by PC
Raw device, signal generator produce corresponding signal and made a response to meters under test, instrument, while PC control camera is taken pictures acquisition figure
Picture, then judge whether instrument board is qualified by image procossing, it is characterised in that the visible detection method includes following steps
Suddenly：Drawing template establishment, carry out template matches during detection every time；One rectangle of parameter setting, the detection zone of each individual event is confined,
Detection to control lamp is exactly that the gray value and tone value in region are confined by image procossing detection, and the detection to pointer is exactly
The RED sector in region is extracted, fitting is in alignment, then calculates angle.
The visible detection method of automobile combination meter as described above, it is characterised in that：The establishment of the template is to use phase
Machine shoots a pictures, according to image pyramid match pattern, is created with the operator create_shape_model in halcon
Build a template, find template be also corresponding to the operator find_shape_model in halcon find template, if
Matching degree height then continues to detect, and needs to re-create template if matching degree is low, matching degree can be in the parameter of operator
Setting.
The visible detection method of automobile combination meter as described above, it is characterised in that：The detection of the control lamp, its position
Put and determine it is the picture shot according to camera, a rectangle is created by its frame with the operator gen_rectangle1 in halocn
Firmly, as ROI area-of-interests.
The visible detection method of automobile combination meter as described above, it is characterised in that：When carrying out gray scale detection to ROI,
A Threshold segmentation threshold first is carried out to ROI, black portions are got rid of, then is found inside connected domain after singulation
Area the best part tuple_find, that is, the part of whole gray value can be most represented, gray scale inspection is carried out to this part
Survey, gray value is calculated with intensity.
The visible detection method of automobile combination meter as described above, it is characterised in that：When carrying out color detection to ROI,
ROI is divided into R, G, B triple channels, then R is calculated with intensity, G, the gray value of B triple channels, if G is maximum, is defined as green
Color, if B is maximum, blueness is defined as, if R is maximum, and R and G ratio value is more than predetermined value, is defined as red, if R
Maximum, and R and G ratio value is less than predetermined value, is defined as orange, and predetermined value is specifically set by adjusting camera.
The visible detection method of automobile combination meter as described above, it is characterised in that：Even during tin detection, by all detections
Lamp ROI make a union using union2, then detect one of ROI supplementary set, calculate the gray value in supplementary set, such as
Fruit is more than setting value, then it is assumed that it and other lamp short circuits, setting value is depending on actual conditions.
The visible detection method of automobile combination meter as described above, it is characterised in that：When pointer detects, find pointer and calculate
Method is the picture shot according to camera, and a rectangle is created by corresponding dial plate with the operator gen_rectangle1 in halocn
Frame, as ROI area-of-interests, because pointer is red, then first carry out gray level threshold segmentation threshold, then
RGB image is transformed into HSI color gamut spaces again, then hue threshold segmentation threshold is carried out to passage H, finally by major axis
The feature select_shape of short axle comes out pointer extracting.
The visible detection method of automobile combination meter as described above, it is characterised in that：Calculating angle in pointer detection
It is that eigentransformation shape_trans is carried out to the pointer extracted, an ellipse is changed into, further according to elliptic_
Axis calculates major axis and the radian of X-axis, then calculates angle by tuple_mult.
Compared with prior art, computer based of the present invention for automobile combination meter visible detection method have with
Lower beneficial effect：
1. there is industrial camera to replace human eye detection.Detection efficiency is improved, reduces false drop rate；
2. system operatio is simple and practical, detection information convenient storage；
3. can compatible a variety of automobile instruments.
Brief description of the drawings
Fig. 1 is the theory diagram of the visible detection method of the automobile combination meter of the present invention.
Fig. 2 is the overhaul flow chart of the visible detection method of the automobile combination meter of the present invention.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.Those skilled in the art can make various changes or modifications to the present invention, these
The equivalent form of value is equally within the scope of claims listed by the application limit.
The present invention discloses a kind of visible detection method of automobile combination meter.There are multiple signals to need on automobile combination meter disk
Detect, LED（Analog signal）, CAN control lamp（CAN signal）, speedometer（Frequency signal）, revolution counter（CAN signal）、
Fuel level gauge（Resistance signal）, water-thermometer（CAN signal）, upper air gauge（Voltage signal）, lower air gauge（Voltage signal）.Referring to figure
1, the detecting system that the visible detection method uses includes meters under test, camera, PC and signal generator.Detection method
It is：PC sends instructions to signal generator, and signal generator produces corresponding signal and made a response to meters under test, instrument, together
When PC control camera take pictures and obtain image, then judge whether instrument board qualified by image procossing.Pass through machine vision pair
Combination instrument is detected, and substantially reduces detection time, improves efficiency, substitutes human eye detection, more accurately.
Referring to Fig. 2, computer based is directed to the visible detection method of automobile combination meter, and its main flow is：Create
Template, template matches are carried out during detection every time, prevented because dial plate pose to be checked caused by external cause changes（Pose changes not
It can be rotated, be offset to position by radiating conversion in the case of big）.One rectangle of parameter setting, confines each list
The detection zone of item, the detection to lamp are exactly that the gray value and tone value in region are confined by image procossing detection.To pointer
Detection be exactly to extract the RED sector in region, fitting is in alignment, then calculates angle.For the electricity in detection process
Pressure, electric current are monitored in real time.Prevent that voltage x current is excessive, damage instrument.
The specific implementation method of the visible detection method is described in detail below.The algorithm of image processing section is
With Halcon this software completions, the code then write is embedded into VS2012.
1. template
Camera shoots a pictures, according to image pyramid match pattern, with the operator create_shape_ in halcon
Model creates a template.Searching template is found corresponding to being also with the operator find_shape_model in halcon
Template.Continue to detect if matching degree height, need to re-create template if matching degree is low.Matching degree can be in operator
Parameter in set.
2. lamp inspection is controlled to survey
1）Position determines
The picture shot according to camera, a rectangle is created by its frame with the operator gen_rectangle1 in halocn
Firmly.As ROI（Area-of-interest）.
2）Gray scale detection
Gray scale detection is carried out to ROI.When being entered due to some lamps by frame, there are the black portions of hollow out, gray scale can be dragged down and put down
Average, so first carrying out a Threshold segmentation threshold to ROI, black portions are got rid of, then connected domain after singulation
Area the best part tuple_find is found in the inside, that is, can most represent the part of whole gray value, and this part is entered
Row gray scale detection.Gray value is calculated with intensity.
3）Color detection
ROI is divided into R, G, B triple channels, R, G, the gray value of B triple channels are being calculated with intensity.If G is maximum,
It is defined as green.If B is maximum, blueness is defined as.If R is maximum, and R and G ratio value is more than predetermined value, is defined as red
Color.If R is maximum, and R and G ratio value is less than predetermined value, is defined as orange.Predetermined value is specifically set by adjusting camera
It is fixed.
4）Even tin detection
The lamp ROI of all detections is made into a union using union2, then detects one of ROI supplementary set, is counted
Calculate the gray value in supplementary set.If greater than setting value, then it is assumed that it and other lamp short circuits.Setting value according to actual conditions and
It is fixed.
3. pointer detects
1）Find pointer
The picture shot according to camera, creating a rectangle with the operator gen_rectangle1 in halocn will be corresponding
Dial plate frames.As ROI（Area-of-interest）.Because pointer is red, gray level threshold segmentation is then first carried out
Threshold, RGB image is then transformed into HSI color gamut spaces again, then hue threshold segmentation is carried out to passage H
Threshold, pointer extracting is come out finally by the feature select_shape of major axis short axle.
2）Calculate angle
Eigentransformation shape_trans is carried out to the pointer extracted, is changed into an ellipse, further according to
Elliptic_axis calculates major axis and the radian of X-axis, then calculates angle by tuple_mult.
4.LCD is detected
1）Position determines
The picture shot according to camera, a rectangle is created by its frame with the operator gen_rectangle1 in halocn
Firmly.As ROI（Area-of-interest）.
2）Progress bar detects
A progress bar is first clapped as empty picture, a ROI is extracted by the rectangle frame of establishment, then shoot one and want to reach
To the progress bar picture of a certain position, another ROI is extracted by the rectangle frame of establishment.By comparing check_
Difference, you can obtain progress bar.Minimum enclosed rectangle is obtained further according to smallest_rectangle1, is finally calculated
Rectangle length is progress bar length.
5. maximum power dissipation detects and two output voltage detection
Programmable power supply is sent instructions to by serial ports（The road programmable power supplies of Ai Dekesi tri-）, feed back corresponding voltage x current
Value.
6. output waveform detects
The frequency of output waveform, amplitude and dutycycle are detected with reference to PCIE1810 board.
The criterion of testing result：The master meter thought by one piece of producer, its all item is detected one by one, measured
Analog value i.e. be considered standard value.It is saved in a data structure.Further according to the value of standard value setting bound, preserve
Into an argument structure body.Every time during detection, if the value measured in the range of bound, that is, it is qualified to think, if it exceeds
Scope, then regard as unqualified.
The main feature of the visible detection method has：1. drawing template establishment before detection, directly template is carried out during detection
Matching.Matching degree height then continues to detect.Matching degree is low then to stop detection.
2. all detections on pair instrument board carry out parameter editor, can probably position.Wherein pointer be positioned to
The position that suitable rectangle may deflect it all includes.
3. it can be detected individually for some lamp（Calculate hue and luminance value）, or for the progress of a certain pointer
Detection（Calculate deflection angle）.All items can also be detected simultaneously.
4. being compared by the analog value and setting value of system detectio, judge whether instrument board is qualified.
5. detecting each time, an Excel form can be all automatically generated, records all detection informations, if wrong, meeting
One Excel charting error message of regeneration in addition.
6. real-time monitoring voltage, current value in detection process, if too high can alarm.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (6)
1. a kind of visible detection method of automobile combination meter, the detecting system of use includes meters under test, camera, PC and letter
Number generator, signal generator is sent instructions to by PC, signal generator produces corresponding signal and made to meters under test, instrument
Reaction, while PC control camera is taken pictures and obtains image, then judge whether instrument board is qualified by image procossing, its feature exists
In the visible detection method comprises the steps：Drawing template establishment, carry out template matches during detection every time；Parameter setting one
Rectangle, the detection zone of each individual event is confined, the detection to control lamp is exactly to be confined by image procossing detection in region
Gray value and tone value, the detection to pointer are exactly to extract the RED sector in region, and fitting is in alignment, then calculates folder
Angle；
When pointer detects, it is the picture shot according to camera to find pointer algorithm, with the operator gen_ in halocn
Rectangle1 creates a rectangle and frames corresponding dial plate, as the ROI area-of-interests of pointer, because pointer is red
, gray level threshold segmentation threshold is then first carried out, RGB image is then transformed into HSI color gamut spaces again, then to passage H
Hue threshold segmentation threshold is carried out, comes out pointer extracting finally by the feature select_shape of major axis short axle；
Calculating angle in pointer detection is to carry out eigentransformation shape_trans to the pointer extracted, is changed into one
Individual ellipse, major axis and the radian of X-axis are calculated further according to elliptic_axis, then angle is calculated by tuple_mult.
2. the visible detection method of automobile combination meter according to claim 1, it is characterised in that：The establishment of the template
It is to shoot a pictures with camera, according to image pyramid match pattern, with the operator create_shape_ in halcon
Model creates a template, find template be also corresponding to found with the operator find_shape_model in halcon
Template, continue to detect if matching degree height, need to re-create template if matching degree is low, matching degree can be in operator
Parameter in set.
3. the visible detection method of automobile combination meter according to claim 1, it is characterised in that：The inspection of the control lamp
Survey, its position determines it is the picture shot according to camera, and a rectangle is created with the operator gen_rectangle1 in halocn
Framed, as control the ROI area-of-interests of lamp.
4. the visible detection method of automobile combination meter according to claim 3, it is characterised in that：ROI to controlling lamp
When area-of-interest carries out gray scale detection, a Threshold segmentation threshold first is carried out to the ROI area-of-interests for controlling lamp,
Black portions are got rid of, then area the best part tuple_find is found inside connected domain after singulation, that is, most
The part of whole gray value can be represented, gray scale detection is carried out to this part, gray value is calculated with intensity.
5. the visible detection method of automobile combination meter according to claim 3, it is characterised in that：ROI to controlling lamp
When area-of-interest carries out color detection, the ROI area-of-interests for controlling lamp are divided into R, G, B triple channels, then use intensity
R is calculated, G, the gray value of B triple channels, if G is maximum, green is defined as, if B is maximum, is defined as blueness, if R is maximum,
And R and G ratio value is more than predetermined value, is defined as red, if R is maximum, and R and G ratio value is less than predetermined value, fixed
Justice is orange, and predetermined value is specifically set by adjusting camera.
6. the visible detection method of automobile combination meter according to claim 3, it is characterised in that：, will even during tin detection
The ROI area-of-interests of the control lamp of all detections make a union using union2, then the one of control lamp of detection
ROI area-of-interests supplementary set, the gray value in supplementary set is calculated, if greater than setting value, then it is assumed that it is with other lamp short circuits
, setting value is depending on actual conditions.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106404417A (en) * | 2016-08-03 | 2017-02-15 | 重庆盟讯电子科技有限公司 | Non-contact type automobile instrument panel test system and method |
| CN106951900B (en) * | 2017-04-13 | 2019-10-22 | 杭州申昊科技股份有限公司 | A kind of automatic identifying method of arrester meter reading |
| CN109060799A (en) * | 2018-05-23 | 2018-12-21 | 嘉兴微芒科技有限公司 | A kind of assembling line finished product detection determination method |
| CN109186943A (en) * | 2018-08-17 | 2019-01-11 | 国营芜湖机械厂 | A kind of image collecting device of aircraft parameter display |
| CN109489988A (en) * | 2018-09-27 | 2019-03-19 | 惠州市德赛西威汽车电子股份有限公司 | A kind of simulation real vehicle key starting vision durability Meter Test system |
| CN110146121B (en) * | 2019-05-24 | 2021-02-09 | 安徽扬远信息科技有限公司 | Instrument panel performance evaluation control system |
| CN110987467A (en) * | 2019-11-25 | 2020-04-10 | 航天科技控股集团股份有限公司 | Method for realizing automatic detection of automobile instrument by configuring csv file |
| CN112418222B (en) * | 2020-12-07 | 2023-07-25 | 安徽江淮汽车集团股份有限公司 | Vehicle-mounted liquid crystal combination meter identification method, device, equipment and storage medium |
| CN113532882A (en) * | 2021-07-22 | 2021-10-22 | 中国第一汽车股份有限公司 | Automobile instrument testing method, device and system and storage medium |
| CN113865636B (en) * | 2021-09-28 | 2024-02-02 | 北斗星通智联科技有限责任公司 | Instrument testing method and system and electronic equipment |
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