CN205607423U - Automatic identification equipment of automobile instrument pointer indicated value - Google Patents
Automatic identification equipment of automobile instrument pointer indicated value Download PDFInfo
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- CN205607423U CN205607423U CN201620289388.6U CN201620289388U CN205607423U CN 205607423 U CN205607423 U CN 205607423U CN 201620289388 U CN201620289388 U CN 201620289388U CN 205607423 U CN205607423 U CN 205607423U
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- indicated value
- pointer
- automatic identification
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Abstract
The utility model relates to an automatic identification equipment of automobile instrument pointer indicated value, the device include controller and CCD camera at least, be provided with CCD image sensor in the CCD camera, the controller is connected through the CAN bus communication instrument between the instrument with awaiting measuring, the electricity is connected between CCD image sensor and the controller, is equipped with the instrument installation of awaiting measuring face to face in that the camera lens of CCD camera is positive, the CCD camera and the rigid connection between the instrument that awaits measuring to the gauge outfit of the instrument that awaits measuring is aimed at to the camera lens of CCD camera, makes relative position between the gauge outfit of camera lens and the instrument that awaits measuring at fixed status under the circumstances of non - manual operation. The simple structure of whole device, with low costs, recognition accuracy is high and the stable performance is reliable, the instrument that will await measuring fixed mounting is in the instrument installation position of awaiting measuring, and this device of start back can be automatically digitize discernment to pointer motormeter's pointer indicated value to be tested, simple and efficient to handle.
Description
Technical field
This utility model relates to the automatic test device of a kind of automobile instrument, specifically, relates to a kind of automatic identification equipment that can automatically identify automobile meter pointer indicated value.
Background technology
Conventional automobile instrument type is pointer instrument, is typically made up of speedometer, tachoscope, water-thermometer and four dial plates of fuel gauge.Instrument function in automobile has increasing trend in recent years, and requirement that instrument function is tested by client is more and more higher, the pressure of manual testing is the most increasing, cause the function thoroughly verifying a instrument plus the uncertainty of manual testing and randomness, need substantial amounts of manpower and time to ensure the accuracy of test.Therefore automatic test is particularly important, and its pointer identification technology is again the key technology of automatic test.
The most conventional automobile meter pointer identification technology has following several:
(1) bitmap comparison technology: the several test points (0Km/h, 10Km/h, 20Km/h, 30Km/h, the 40Km/h such as speedometer ...) needing test are saved as bitmap format and leaves in picture library, external equipment is utilized to point to correspondence position by speedometer, utilize sensor acquisition to compare with the standard bitmap in picture library to the display bitmap of gauge outfit, utilize inquiry relative method to obtain the actual indicated value of speed.
(2) pointer angle calculation technology: utilize image acquiring sensor to gather gauge outfit image, image processing techniques is utilized to be extracted from image by pointer, some point one line segments of composition on fetching pin, calculate the angle of this section of line segment, go out the actual value of pointer instruction according to angle conversion.
(3) using external equipment first to determine the center of circle of pointer on the basis of (2), as the starting point of line segment, then the correct position on line segment finds another point to use send out the angle determining pointer at 2, and angle conversion is become corresponding indicated value.
All there are some drawbacks in three of the above mode, the pointer information in (1) expends memory space in a large number with bitmap form storage, and query method expends the time, is unfavorable for test；(2) in, method is no problem to the dial plate within 180 °, but hand of dial will exist the angular superposition problem of different indicated value more than 180 °；(3) although solving the problem of angular superposition, but find the center of circle accurately and need accurate equipment and suitable angle, once occur that sensor angles and position change, adjustment need to be taken considerable time.
Summary of the invention
The purpose of this utility model is to provide a kind of automatic identification equipment that can automatically identify automobile meter pointer indicated value, and this apparatus structure is simple, easy to operate, can avoid using accurate external equipment, low cost, identifies that sensitivity and precision are high, stable and reliable for performance.
To achieve these goals, the technical solution adopted in the utility model is, a kind of automatic identification equipment of automobile meter pointer indicated value, this device at least includes controller and ccd video camera, it is provided with ccd image sensor in described ccd video camera, it is connected by CAN communication tool between described controller and meters under test, electrically connect between described ccd image sensor and controller, camera lens right opposite at ccd video camera is provided with meters under test installation position, it is rigidly connected between described ccd video camera and meters under test, and the gauge outfit of the alignment lens meters under test of ccd video camera, the relative position between camera lens and the gauge outfit of meters under test is made to be in stationary state in the case of non-artificial operation.
As a kind of improvement of the present utility model, it is also associated with on described controller touching display screen, touch display screen to use as man-machine interface, the test parameter of whole device can be set by touching display screen, and the state tested and data etc. can present in front of the user intuitively by touching display screen.
As a kind of improvement of the present utility model, described controller is provided with for identifying the position SR whether being moved between meters under test with imageing sensor relative to position, when being manually pressed by position SR, Mobile sign position in controller is arranged to numerical value " 1 ", when the control instruction of controller has performed to look for the center of rotation (the i.e. new center of circle) of pointer to be upspring by button after operating, and the Mobile sign position in controller is arranged to numerical value " 0 ".
As a kind of improvement of the present utility model, it is connected by wire or bluetooth or wireless network between described controller and ccd video camera.
As a kind of improvement of the present utility model, described controller uses dsp chip to realize.
Relative to prior art, of the present utility model simple and reliable for structure, easy to use, low cost, labor intensity is low, and meters under test is fixedly installed in meters under test installation position, after start this device can automatically to pointer-type automobile instrument pointer indicated value be digitized identify test, without accurate external equipment, False Rate is low and stable and reliable for performance；Relative position between ccd video camera camera lens with meters under test gauge outfit is automatically identified by controller by the state of detection position SR, and accuracy of identification is high, simple and quick.
Accompanying drawing explanation
Fig. 1 is system architecture diagram of the present utility model.
Fig. 2 is to use this device to carry out the test flow chart that speedometer pointer indicated value identifies automatically.
Detailed description of the invention
In order to deepen understanding and cognition of the present utility model, below in conjunction with the accompanying drawings this utility model it is further described and introduce.
As it is shown in figure 1, the automatic identification equipment of a kind of automobile meter pointer indicated value, including controller, ccd video camera and touch display screen.Described controller uses dsp chip to realize, it is provided with ccd image sensor in described ccd video camera, it is connected by CAN communication tool (such as SPY3, CANoe etc.) between described controller and meters under test, is connected by wire between described controller and ccd video camera.Camera lens right opposite at ccd video camera is provided with meters under test installation position, it is rigidly connected between described ccd video camera and meters under test, and the gauge outfit of the alignment lens meters under test of ccd video camera so that the relative position between camera lens and the gauge outfit of meters under test is in stationary state in the case of non-artificial operation.
Described controller is provided with for identifying the position SR whether being moved between meters under test with imageing sensor relative to position, when being manually pressed by position SR, Mobile sign position in controller is arranged to numerical value " 1 ", when position SR is upspring automatically, the Mobile sign position in controller is arranged to numerical value " 0 ".
Described touch display screen uses as man-machine interface, can arrange the test parameter of whole device by touching display screen, and the state tested and data etc. can present in front of the user intuitively by touching display screen.
As in figure 2 it is shown, the test operating procedure using above-mentioned automatic identification equipment automatically to test speedometer is as follows:
(1) fixed vehicle speed table: will carry out the gauge outfit allowing camera lens be directed at speedometer that is rigidly connected between speedometer with ccd video camera, the Mobile sign position in controller is manually set to numerical value " 1 " by SR depressed position.
(2) initial pictures obtains: use CAN communication tool to be communicatively coupled controller and speedometer, the start that powers on arranges test parameter by touching display screen, controller arranges the pointer travel of speedometer automatically after completing to initialize be the scale zero position on initial angle 0(i.e. dial plate), ccd image sensor gathers the first two field picture and sends into controller；The most automatically the pointer travel arranging speedometer is 90 ° of angles relative to initial angle, and the equation herein using right angle mode to make to calculate the center of rotation position of pointer is the simplest efficiently, and ccd image sensor gathers the second two field picture and sends into controller.
(3) initial pictures pretreatment: the first frame that controller collects and the second two field picture are the source color image of lossless BMP form, the first width black and white BMP image and the second width black and white BMP image of only black and white it is converted into after source images is carried out gradation of image and binary conversion treatment, in black and white BMP image, pointer is white, and the scale information on dial plate and dial plate is black.
(4) center of rotation of pointer is determined: controller arranges two radiuses and all cuts so that the pointer in image and two concentric circulars produce two intersection points less than the concentric circular of pointer length to the first width black and white BMP image, and obtain Article 1 straight line, reuse concentric circular the second width black and white BMP image is cut and obtains Article 2 straight line, two linear equations can be drawn according to Article 1 and Article 2 straight line, utilize linear equation to calculate intersection point, obtain the center of rotation of pointer.
(5) test benchmark line is determined: the length of pointer as the known center of circle and is formed new circle as radius and cuts the first width black and white BMP image by the center of rotation of pointer by controller, pointer in image produces an intersection point with this circle, this intersection point is connected one ray of formation, using this ray as the datum line of test with the known center of circle.
(6) controller enters official testing pattern: controller first sends numerical value " 0 " to Mobile sign position, position SR is upspring, the most automatically the pointer arranging speedometer is actual test value, ccd image sensor gathers image, image is being obtained black and white BMP image through gradation of image and binary conversion treatment, utilizing Hough (Hough) conversion to extract pointer line segment in black and white BMP image, the intersection point produced with above-mentioned circle according to pointer line segment and the known center of circle constitute test ray.
(7) it is rotated clockwise to test ray and terminates formed angle by initiateing from benchmark ray and be designated as the deflection angle of pointer, the numerical value corresponding relation formula Y=A* θ of the indicated value of the deflection angle according to pointer and pointer is (wherein, Y is the actual indicated value of pointer, A is proportionality coefficient, and θ is the deflection angle of pointer) calculate the actual indicated value of current pointer.Such as, general speedometer, its throw of pointer angular range is generally 0-240 °, corresponding velocity amplitude scope is 0-220km/h, A=220/240=11/12, therefore for this speedometer, the deflection angle of its pointer is specially V=11/12* θ with the numerical value corresponding relation formula of indicated value, in formula, V is speed, and θ is the deflection angle of pointer.
(8) controller test data are delivered to touch display screen carry out real-time output display.
When behind the artificial relative position adjusted between ccd video camera and speedometer, position SR is pressed, controller detects when position SR is pressed, the numerical value of Mobile sign position is set to " 1 ", jump to step (2) restart down to perform simultaneously, as controller detects that position SR is not pressed, then jump to step (6) and continue down to perform.
It should be noted that above-described embodiment, be not used for limiting protection domain of the present utility model, equivalents done on the basis of technique scheme or replacement each fall within this utility model scope of the claimed protection.
Claims (5)
1. the automatic identification equipment of an automobile meter pointer indicated value, it is characterized in that: this device at least includes controller and ccd video camera, it is provided with ccd image sensor in described ccd video camera, it is connected by CAN communication tool between described controller and meters under test, electrically connect between described ccd image sensor and controller, camera lens right opposite at ccd video camera is provided with meters under test installation position, it is rigidly connected between described ccd video camera and meters under test, and the gauge outfit of the alignment lens meters under test of ccd video camera.
The automatic identification equipment of a kind of automobile meter pointer indicated value the most as claimed in claim 1, it is characterised in that be also associated with on described controller touching display screen.
The automatic identification equipment of a kind of automobile meter pointer indicated value the most as claimed in claim 1, it is characterised in that described controller is provided with for identifying the position SR whether being moved between meters under test with imageing sensor relative to position.
The automatic identification equipment of a kind of automobile meter pointer indicated value the most as claimed in claim 2 or claim 3, it is characterised in that be connected by wire or bluetooth or wireless network between described controller and ccd video camera.
The automatic identification equipment of a kind of automobile meter pointer indicated value the most as claimed in claim 4, it is characterised in that described controller uses dsp chip to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620289388.6U CN205607423U (en) | 2016-04-08 | 2016-04-08 | Automatic identification equipment of automobile instrument pointer indicated value |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620289388.6U CN205607423U (en) | 2016-04-08 | 2016-04-08 | Automatic identification equipment of automobile instrument pointer indicated value |
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| CN205607423U true CN205607423U (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620289388.6U Active CN205607423U (en) | 2016-04-08 | 2016-04-08 | Automatic identification equipment of automobile instrument pointer indicated value |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314784A (en) * | 2017-08-11 | 2017-11-03 | 华东交通大学 | A kind of new method of portable installing type train instrument monitoring |
| CN108507604A (en) * | 2018-04-10 | 2018-09-07 | 航天科技控股集团股份有限公司 | A kind of full-automatic pointer regulation system |
| CN109991013A (en) * | 2017-12-29 | 2019-07-09 | 上汽通用五菱汽车股份有限公司 | A kind of Bus- Speed Monitoring platform of view-based access control model system |
-
2016
- 2016-04-08 CN CN201620289388.6U patent/CN205607423U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314784A (en) * | 2017-08-11 | 2017-11-03 | 华东交通大学 | A kind of new method of portable installing type train instrument monitoring |
| CN109991013A (en) * | 2017-12-29 | 2019-07-09 | 上汽通用五菱汽车股份有限公司 | A kind of Bus- Speed Monitoring platform of view-based access control model system |
| CN108507604A (en) * | 2018-04-10 | 2018-09-07 | 航天科技控股集团股份有限公司 | A kind of full-automatic pointer regulation system |
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