CN104019843A - Device and method for achieving automatic zero position correction of pointer of automobile instrument based on image processing and metaprograming technology - Google Patents
Device and method for achieving automatic zero position correction of pointer of automobile instrument based on image processing and metaprograming technology Download PDFInfo
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Abstract
The invention discloses a device and method for achieving automatic zero position correction of pointers of automobile instruments based on the image processing and metaprograming technology, and belongs to the technical field of zero position correction of the pointers of the automobile instruments. The device and method aim to solve the problems that the zero position of the pointers of the automobile instruments is corrected manually in the prior art, the precision is low and misalignment of the zero position is easily caused. The device comprises a visual detection module, an industrial camera and a programmer. In the method, starting from internal programs of the automobile instruments, initialization programs of the instruments are modified to different degrees according to different conditions of the instruments; considering that program parameters corresponding to the speed, the angle of the pointers and the rotation angle of motors are in linear correspondence, only the number of revolutions of the motors is modified; after automobiles are started, the pointers point to the zero position accurately; due to the fact that the zero deviation parameters of the instruments are different, it is needed to carry out zero position detection first and then carry out correction. The device and method are applied to automatic correction of the pointers of the automobile instruments.
Description
Technical field
The present invention relates to the automobile meter pointer zero-bit automatic straightening device and method based on image processing and metaprogramming technology, belong to automobile meter pointer zero-bit correcting technology field.
Background technology
Automobile instrument is taked pipelining in the time producing, mechanization, electrifing degree are higher, only have the installation of gauge pointer to remain and take handwork, because indicator and indicator axle are interference fit, again because automobile instrument belongs to exact instrument, higher to machining precision and quality requirements, the method of handwork is in precision and all unsatisfactory qualitatively, extremely easily there is the situation of null position misalignment, so automobile instrument production industry is badly in need of a kind of method of reliable automatic straightening automobile instrument zero-bit.
Pointer zero-bit is corrected often needs two links: the position deviation that 1, detects zero-bit; 2, the initial position of change pointer.In most factories, adopt human eye detection zero drift, then manual setting pointer travel, the extremely low and as easy as rolling off a log mistake that occurs of this working method efficiency, also easily brings other unpredictable mistake.
Image processing techniques can improve precision and the speed that zero drift detects, and can greatly improve the efficiency of the flow work flow process, and than human eye detection, the data that obtain are more reliable.And the present pointer position detection technique based on image processing is relatively ripe, adopts the gauge pointer corner recognition methods based on image processing, can reach the desired error range of instrument zero-bit completely.How, based on image processing techniques, realizing the automatic straightening of automobile meter pointer zero-bit, is another problem that need to solve.
Summary of the invention
The zero-bit the present invention seeks in order to solve existing automobile meter pointer takes manual type to correct, precision is low and easily cause the problem of null position misalignment, provides a kind of and has processed and the automobile meter pointer zero-bit automatic straightening device and method of metaprogramming technology based on image.
Automobile meter pointer zero-bit automatic straightening device based on image processing and metaprogramming technology of the present invention, it comprises:
Be used for controlling automobile instrument system initialization, control industrial camera and carry out image acquisition, the instrument gray level image of industrial camera collection is processed to acquisition gauge pointer zero drift value; The parameter that the zero drift value of definition motor module is obtained interface, adjusted with macrodefined form statement motor module wish, and by the independent header file of the parameter read-in motor module of zero drift value and wish adjustment, preset the default value of motor module, online the zero drift value of obtaining is constantly write in motor module header file with macro definition form, to upgrade the vision-based detection module of motor module;
For the gauge pointer image of automobile instrument system is taken pictures and is obtained the industrial camera of instrument gray level image;
For the program burn writing device to the motor control chip of automobile instrument system by the motor module programming after upgrading.
The instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value for adopting image processing module to realize, and it comprises:
For instrument gray level image is carried out to image pre-service, then carry out binary conversion treatment and obtain the pretreatment module of instrument gray level image to be identified;
Be used for treating identification instrument gray level image and carry out dial scale information extraction acquisition panel board image, then panel board image is carried out to Hough circle transformation, finally determine the image processing module in the panel board center of circle;
Carry out the polar coordinate transform module of polar coordinate transform acquisition polar coordinate image for treat identification instrument gray level image according to the panel board center of circle; The radius of circle of the corresponding panel board of x axle of polar coordinate image, the corresponding pointer anglec of rotation of y axle;
For set up the module of scale sequence according to the scale part of polar coordinate image;
For according to the pointer on polar coordinate image, obtain the equation module of the parametric equation of the straight line of pointer;
For obtaining the scale value of pointed according to scale sequence and the parametric equation of the straight line, then subtract each other with zero graduation the deviation computing module that obtains zero drift value.
Based on the automobile meter pointer zero-bit automatic correction method of image processing and metaprogramming technology, it comprises:
For carrying out image acquisition by the initialization of vision-based detection module controls automobile instrument system, control industrial camera, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value; The parameter that the zero drift value of definition motor module is obtained interface, adjusted with macrodefined form statement motor module wish, and by the independent header file of the parameter read-in motor module of zero drift value and wish adjustment, preset the default value of motor module, online the zero drift value of obtaining is constantly write in motor module header file with macro definition form, to upgrade the step of motor module;
For adopting industrial camera to take pictures and obtain the step of instrument gray level image the gauge pointer image of automobile instrument system;
For the motor module after upgrading is passed through to the step of program burn writing device programming to the motor control chip of automobile instrument system.
The instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value for to realize by image processing step, and it comprises:
For instrument gray level image is carried out to image pre-service, then carry out binary conversion treatment and obtain the pre-treatment step of instrument gray level image to be identified;
Be used for treating identification instrument gray level image and carry out dial scale information extraction acquisition panel board image, then panel board image is carried out to Hough circle transformation, finally determine the step in the panel board center of circle;
Carry out the step of polar coordinate transform acquisition polar coordinate image for treat identification instrument gray level image according to the panel board center of circle; The radius of circle of the corresponding panel board of x axle of polar coordinate image, the corresponding pointer anglec of rotation of y axle;
For set up the step of scale sequence according to the scale part of polar coordinate image;
For according to the pointer on polar coordinate image, obtain the step of the parametric equation of the straight line of pointer;
For obtaining the scale value of pointed according to scale sequence and the parametric equation of the straight line, then subtract each other with zero graduation the step that obtains zero drift value.
Advantage of the present invention: when apparatus of the present invention and method are considered automobile starting, gauge pointer can all reset, if pointer zero-bit misalignment can be seen obvious deviation at this moment.So start with from the internal processes of automobile instrument, for the different situations of instrument, instrument initialize routine is made to different amendments.Consider that speed, pointer angle and the corresponding program parameter of motor corner are linear corresponding, can successfully, can make like this after automobile starting so only need to change the motor revolution of zero-bit, pointer points to zero-bit exactly.Due to the zero drift parameter difference of each instrument, thus need to first carry out zero testing, then correct.It is automobile instrument motor module programming code that the present invention adopts metaprogramming technology, improved greatly work efficiency, and error rate is extremely low.
Combining image treatment technology of the present invention and metaprogramming technology are processed instrument zero-bit misalignment situation, automaticity is high, only need workman to place to click a few buttons after instrument both to have completed whole work, improve greatly the work efficiency of whole streamline, and improved greatly the accuracy of correction result.
Adopt metaprogramming technology to write motor module code, the code speed of writing is exceedingly fast, and error rate is extremely low, as long as at metaprogram place modifying target code compiling form, the arbitrary portion code that just can revise arbitrarily motor module program has high work efficiency in batch production.
The present invention can be applicable to the zero-bit of various automobile instruments and corrects, and only need write different object codes according to the type of drive of different motors at the object code place of writing, and favorable expandability, is easy to amendment.
Brief description of the drawings
Fig. 1 is the FB(flow block) of apparatus of the present invention and method;
Fig. 2 is the workflow diagram of apparatus of the present invention and method.
Embodiment
Embodiment one: below in conjunction with Fig. 1 and Fig. 2, present embodiment is described, processes described in present embodiment and the automobile meter pointer zero-bit automatic straightening device of metaprogramming technology based on image, it comprises:
Be used for controlling automobile instrument system initialization, control industrial camera and carry out image acquisition, the instrument gray level image of industrial camera collection is processed to acquisition gauge pointer zero drift value; The parameter that the zero drift value of definition motor module is obtained interface, adjusted with macrodefined form statement motor module wish, and by the independent header file of the parameter read-in motor module of zero drift value and wish adjustment, preset the default value of motor module, online the zero drift value of obtaining is constantly write in motor module header file with macro definition form, to upgrade the vision-based detection module of motor module;
For the gauge pointer image of automobile instrument system is taken pictures and is obtained the industrial camera of instrument gray level image;
For the program burn writing device to the motor control chip of automobile instrument system by the motor module programming after upgrading.
In present embodiment, vision-based detection module, industrial camera and automobile instrument system form zero testing subsystem, this subsystem complete control, the image of control, the instrument of industrial camera acquisition and processing, write the required respective code of automobile instrument motor module program, wherein vision-based detection module is metaprogram.
Program burn writing device and automobile instrument system composition program burn writing subsystem, the relevant parameter code of motor control chip is generated by metaprogram, and the work of program burn writing subsystem is by zero testing subsystem controls.
In vision-based detection module, the default value of motor module represents the relevant parameter when program of motor control chip does not need to adjust.Vision-based detection module is sent startup command to automobile instrument system, makes it start instrument carry out initialization, allows pointed zero-bit, then sends photographing command to industrial camera, collects a width instrument gray level image; After zero drift value is write in described header file with macro definition form, discharge the control of vision-based detection module to automobile instrument system, and send programming order to program burn writing device, so far work and proceed to program burn writing subsystem by zero testing subsystem;
Program burn writing device is received after the order from zero testing subsystem, by new motor module program burn writing in motor control chip, treat to send end signal to vision-based detection module after programming, and the control of release procedure fever writes to instrument system, so far work and proceed to zero testing subsystem by program burn writing subsystem;
Vision-based detection module is received after the signal from program burn writing subsystem, repeats above-mentioned correcting process, until zero drift finishes all working within the scope of permissible error.
Embodiment two: present embodiment is described below in conjunction with Fig. 1, present embodiment is described further embodiment one, in present embodiment, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value for adopting image processing module to realize, it comprises:
For instrument gray level image is carried out to image pre-service, then carry out binary conversion treatment and obtain the pretreatment module of instrument gray level image to be identified;
Be used for treating identification instrument gray level image and carry out dial scale information extraction acquisition panel board image, then panel board image is carried out to Hough circle transformation, finally determine the image processing module in the panel board center of circle;
Carry out the polar coordinate transform module of polar coordinate transform acquisition polar coordinate image for treat identification instrument gray level image according to the panel board center of circle; The radius of circle of the corresponding panel board of x axle of polar coordinate image, the corresponding pointer anglec of rotation of y axle;
For set up the module of scale sequence according to the scale part of polar coordinate image;
For according to the pointer on polar coordinate image, obtain the equation module of the parametric equation of the straight line of pointer;
For obtaining the scale value of pointed according to scale sequence and the parametric equation of the straight line, then subtract each other with zero graduation the deviation computing module that obtains zero drift value.
Embodiment three: below in conjunction with Fig. 1 and Fig. 2, present embodiment is described, processes described in present embodiment and the automobile meter pointer zero-bit automatic correction method of metaprogramming technology based on image, it comprises:
For carrying out image acquisition by the initialization of vision-based detection module controls automobile instrument system, control industrial camera, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value; The parameter that the zero drift value of definition motor module is obtained interface, adjusted with macrodefined form statement motor module wish, and by the independent header file of the parameter read-in motor module of zero drift value and wish adjustment, preset the default value of motor module, online the zero drift value of obtaining is constantly write in motor module header file with macro definition form, to upgrade the step of motor module;
For adopting industrial camera to take pictures and obtain the step of instrument gray level image the gauge pointer image of automobile instrument system;
For the motor module after upgrading is passed through to the step of program burn writing device programming to the motor control chip of automobile instrument system.
In present embodiment, the zero drift value of definition motor module is obtained interface GetZeroOfs (), in function, import the member variable of motor module class into by correcting parameter, and in independent header file, state some macro definitions, macrodefined value is from zero testing subsystem.
Windows operating system is installed on industrial computer, and opens vision-based detection module, module starts by CAN bus control instrument, and make each pointed zero-bit, take pictures by 1394 card control industrial cameras again, thereby collect piece image, be converted into gray level image.
Gray level image is processed.First mark area-of-interest, then image is carried out to thresholding, then adopt Canny operator extraction profile, image is corroded by the template of 3*3, then carry out connected domain and search, obtain and only contain calibration points image, all scale central points are carried out to Hough circle transformation to determine the dial plate center of circle.Centered by the dial plate center of circle, image is carried out to polar coordinate transform, the pointer that the image obtaining contains traverse and the calibration points of longitudinal arrangement.Image is carried out to connected domain and search acquisition calibration points information and pointer part image, and then obtain the ordinate sequence of calibration points, pointer part image is carried out carrying out the conversion of Hough straight line after refinement again, obtain straight-line equation.The scale value of utilizing straight-line equation and scale retrieval straight line to point to, then subtract each other acquisition zero drift with zero graduation, the result obtaining in experiment is+0.153, unit is scale.
By relevant position in header file described in zero drift substitution, export in file.Then close instrument, and start-up routine fever writes, prepare in the motor chip of the new burned instrument of instrument program.
In program burn writing device, read in new instrument program, then by program burn writing in instrument, after completing, close instrument, and rerun the trace routine of vision-based detection step, again repeat said process, until zero drift meet error range require after power cut-off.
Embodiment four: present embodiment is described below in conjunction with Fig. 1, present embodiment is described further embodiment three, in present embodiment, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value for to realize by image processing step, it comprises:
For instrument gray level image is carried out to image pre-service, then carry out binary conversion treatment and obtain the pre-treatment step of instrument gray level image to be identified;
Be used for treating identification instrument gray level image and carry out dial scale information extraction acquisition panel board image, then panel board image is carried out to Hough circle transformation, finally determine the step in the panel board center of circle;
Carry out the step of polar coordinate transform acquisition polar coordinate image for treat identification instrument gray level image according to the panel board center of circle; The radius of circle of the corresponding panel board of x axle of polar coordinate image, the corresponding pointer anglec of rotation of y axle;
For set up the step of scale sequence according to the scale part of polar coordinate image;
For according to the pointer on polar coordinate image, obtain the step of the parametric equation of the straight line of pointer;
For obtaining the scale value of pointed according to scale sequence and the parametric equation of the straight line, then subtract each other with zero graduation the step that obtains zero drift value.
Claims (4)
1. the automobile meter pointer zero-bit automatic straightening device based on image processing and metaprogramming technology, is characterized in that, it comprises:
Be used for controlling automobile instrument system initialization, control industrial camera and carry out image acquisition, the instrument gray level image of industrial camera collection is processed to acquisition gauge pointer zero drift value; The parameter that the zero drift value of definition motor module is obtained interface, adjusted with macrodefined form statement motor module wish, and by the independent header file of the parameter read-in motor module of zero drift value and wish adjustment, preset the default value of motor module, online the zero drift value of obtaining is constantly write in motor module header file with macro definition form, to upgrade the vision-based detection module of motor module;
For the gauge pointer image of automobile instrument system is taken pictures and is obtained the industrial camera of instrument gray level image;
For the program burn writing device to the motor control chip of automobile instrument system by the motor module programming after upgrading.
2. the automobile meter pointer zero-bit automatic straightening device based on image processing and metaprogramming technology according to claim 1, it is characterized in that, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value for adopting image processing module to realize, and it comprises:
For instrument gray level image is carried out to image pre-service, then carry out binary conversion treatment and obtain the pretreatment module of instrument gray level image to be identified;
Be used for treating identification instrument gray level image and carry out dial scale information extraction acquisition panel board image, then panel board image is carried out to Hough circle transformation, finally determine the image processing module in the panel board center of circle;
Carry out the polar coordinate transform module of polar coordinate transform acquisition polar coordinate image for treat identification instrument gray level image according to the panel board center of circle; The radius of circle of the corresponding panel board of x axle of polar coordinate image, the corresponding pointer anglec of rotation of y axle;
For set up the module of scale sequence according to the scale part of polar coordinate image;
For according to the pointer on polar coordinate image, obtain the equation module of the parametric equation of the straight line of pointer;
For obtaining the scale value of pointed according to scale sequence and the parametric equation of the straight line, then subtract each other with zero graduation the deviation computing module that obtains zero drift value.
3. the automobile meter pointer zero-bit automatic correction method based on image processing and metaprogramming technology, is characterized in that, it comprises:
For carrying out image acquisition by the initialization of vision-based detection module controls automobile instrument system, control industrial camera, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value; The parameter that the zero drift value of definition motor module is obtained interface, adjusted with macrodefined form statement motor module wish, and by the independent header file of the parameter read-in motor module of zero drift value and wish adjustment, preset the default value of motor module, online the zero drift value of obtaining is constantly write in motor module header file with macro definition form, to upgrade the step of motor module;
For adopting industrial camera to take pictures and obtain the step of instrument gray level image the gauge pointer image of automobile instrument system;
For the motor module after upgrading is passed through to the step of program burn writing device programming to the motor control chip of automobile instrument system.
4. the automobile meter pointer zero-bit automatic correction method based on image processing and metaprogramming technology according to claim 3, it is characterized in that, the instrument gray level image of industrial camera collection is processed and obtained gauge pointer zero drift value for to realize by image processing step, and it comprises:
For instrument gray level image is carried out to image pre-service, then carry out binary conversion treatment and obtain the pre-treatment step of instrument gray level image to be identified;
Be used for treating identification instrument gray level image and carry out dial scale information extraction acquisition panel board image, then panel board image is carried out to Hough circle transformation, finally determine the step in the panel board center of circle;
Carry out the step of polar coordinate transform acquisition polar coordinate image for treat identification instrument gray level image according to the panel board center of circle; The radius of circle of the corresponding panel board of x axle of polar coordinate image, the corresponding pointer anglec of rotation of y axle;
For set up the step of scale sequence according to the scale part of polar coordinate image;
For according to the pointer on polar coordinate image, obtain the step of the parametric equation of the straight line of pointer;
For obtaining the scale value of pointed according to scale sequence and the parametric equation of the straight line, then subtract each other with zero graduation the step that obtains zero drift value.
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| CN108663079A (en) * | 2018-04-10 | 2018-10-16 | 航天科技控股集团股份有限公司 | A kind of full-automatic pointer regulation method |
| CN108762181A (en) * | 2018-04-11 | 2018-11-06 | 航天科技控股集团股份有限公司 | Automobile meter pointer adjusting process |
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