CN102322359B - Non-contact electronic accelerator device based on image - Google Patents
Non-contact electronic accelerator device based on image Download PDFInfo
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- CN102322359B CN102322359B CN 201110229385 CN201110229385A CN102322359B CN 102322359 B CN102322359 B CN 102322359B CN 201110229385 CN201110229385 CN 201110229385 CN 201110229385 A CN201110229385 A CN 201110229385A CN 102322359 B CN102322359 B CN 102322359B
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Abstract
The invention discloses a non-contact electronic accelerator device based on an image, which is used for determining a rotation angle of an accelerator pedal. The non-contact electronic accelerator device based on the image comprises the accelerator pedal, an objective image plate, a light source body, an image sensor, an optical device and an evaluation unit, wherein the rotation of the objective image plate around a rotating shaft is limited by the rotation of the accelerator pedal; the output of the image sensor is connected to the evaluation unit, so that the rotation angle of the accelerator pedal is determined; and the evaluation unit comprises a microprocessor. The non-contact electronic accelerator device is characterized in that: the objective image plate comprises an evaluable image; and the evaluation unit at least comprises an image processing module used for calculating the size of a formed image of the evaluable image on the image sensor. Through the non-contact electronic accelerator device, the problems of low stability and complex structure in the prior art are solved.
Description
Technical field
The present invention relates to a kind of non-contact electronic accelerator device based on image, relate to particularly a kind of a kind of E-Gas device based on image that is used for controller car engine cylinder oil inlet quantity.
Background technique
As everyone knows, for controlling the oil inlet quantity of motor vehicle cylinder, and then the rotating speed of control engine and power, the final control realized motor vehicle speed all is provided with gas pedal in the operator cabin of Motor Vehicle.The most traditional gas pedal mostly realizes accelerator open degree control by connecting rod or drag-line, and its a series of actions is mechanical motion.Because a series of actions of this gas pedal is all mechanical motion, make its transmission accuracy and sensitivity not high.Development along with technology, the needs that also improve in order to comply with the locomotive automation degree, and then the locomotive throttle device has entered the E-Gas epoch, the E-Gas occurred the earliest, what adopt is the contact-type electronic throttle, formed the size of brush contact angle displacement signal by resistance film track, printed circuit board or ceramic substrate in a spraying.Because resistance value can change with ambient temperature, brush contact slides on resistance track, its operating life is also limited, and the voltage of potentiometer output needs resistor to work under a very harsh working environment, the variation of ambient temperature can cause the data of debugging under factory's working environment, can produce very large error under running environment, so that exceed the detection range of permission.Simultaneously, be sprayed on resistive layer on printing plate or ceramic substrate and the continuous wearing and tearing between brush, can affect the operating life of potentiometer or sensor and the reliability contacted, and dust, humidity of the air, the parameters such as vibration also can increase the precision of electrical noise and detection.If improve the problem of above-mentioned existence, no matter mechanically, selecting of material, all can increase cost of production on electric processing technology to designed potentiometric transducer.
Progress along with technology, on the basis of contact-type electronic throttle, people's non-contact electronic accelerator device that progressively grown up, described non-contact electronic accelerator device, use some novel devices, described novel device mainly refers to the rotational displacement sensor, and the detection of described rotational displacement in the ripe application of some industrial fields for many years, people progressively recognize the rotational displacement sensor application on auto pedal, valve opening that can the control engine unit; Be applied on steamer and can carry out the control of steering wheel shaft rotary corner; Also can be applicable on the devices such as angle position control of heavy type or agricultural machinery.For the rotational displacement sensor on the locomotive non-contact electronic accelerator device, the Weight and disk type sensor that comprises photoelectric, grating sensor, hall element sensor, the magneto sensitive element sensor, General Requirements can adapt in actual use in ambient temperature-40 ℃ works under the operating conditions of+70 ℃, and operating life at least will reach action more than 500 ten thousand times, but and long-term work under dust and the very large environment of vibration.
Due to a variety of causes, cost, life-span, the reason of reliability aspect, contactless locomotive E-Gas device that in fact at present can ripe application, mainly comprise two types, a kind of employing be photoelectric code disc type sensor, as Toyota Company applies on automobile, the E-Gas of Denso company manufacturing is exactly a kind of typical non-contact electronic accelerator device that adopts photoelectric code disc type sensor, this E-Gas device is famous because of " foot-operated door " event of Toyota Motor, its principle is that described code-disc rotates with gas pedal, photoelectric sensor reads the data on code-disc, these data are directly related with the rotation angle of gas pedal, and there is corresponding relation, this problem of the non-contact electronic accelerator device existence of photoelectric code disc type sensor that adopted is that precision is subject to the restriction of code-disc size can not do highlyer, what is more important, if code-disc is tarnished, likely photoelectric sensor is read the data of a mistake, cause the generation of some catastrophic failures.Although Toyota Motor's " foot-operated door " event does not now also have final result, the photoelectric code disc type non-contact electronic accelerator device that event adopts to it is relevant is undisputable fact.
Another kind of can the ripe contactless locomotive E-Gas device of applying be that ZL200910025315.0 is disclosed at present, the disclosed this non-contact electronic acceleration pedal of ZL200910025315.0, a kind of non-contact electronic acceleration of magneto sensitive element as angle transducer that adopt, magneto sensitive element, as Hall element is placed in the magnetic field of rotation, magneto sensitive element will be exported the magnitude of voltage varied in size because of the difference of gas pedal rotation angle.This employing magneto sensitive element is to be subject to the impact in magnetic field larger as the problem of the non-contact electronic acceleration existence of angle transducer, drive the cross has adopted the people of this electron-like throttle vehicle that such sensation is arranged, during regional larger through the magnetic field such as high voltage wire of steered vehicle, can obviously think that the sensation of throttle and other zone are different.
Another problem that this non-contact electronic acceleration exists is, although Hall element is a linear unit, but the variation that it condition that possesses linear output is magnetic field is also linear, when relative movement occurs along with the rotation of gas pedal in Hall element and magnetic field, many situations are difficult to accomplish allow at the volley magnetic field that linear change occurs, for this reason, the angle that keeps the output of Hall element and gas pedal to rotate keeps linear relation, structural adjustment that must be by complexity and make corresponding correction and could realize on control circuit.This has just brought uncertainty on structural complexity, performance and the increase of cost.In sum, prior art has further improved necessity.
Summary of the invention
The object of the present invention is to provide a kind of non-contact electronic accelerator device based on image, the problem existed to overcome prior art, its output comparatively easily realizes stable linear relationship with the gas pedal rotation angle, simultaneously, surrounding enviroment magnetic field greatly reduces its impact, has structural simplicity and higher reliability and lower cost.
A kind of non-contact electronic accelerator device based on image of the present invention, for determining the rotation angle of gas pedal, described a kind of non-contact electronic accelerator device based on image, comprise gas pedal, the image plate, light source body, image transducer, optical apparatus, assessment unit, described light source body provides light source to the image plate, described image plate images on image transducer by optical apparatus, described image plate can rotate around the axis, the rotation that described image plate can rotation around the shaft is gas pedal is limited, the output of described image transducer is connected to assessment unit, described assessment unit is processed for the image that image transducer is generated, determine the rotation angle of gas pedal, described assessment unit comprises microprocessor, it is characterized in that comprising and can assessing figure on described image plate, described assessment unit at least comprises assessing the figure image processing module that the size of imaging is calculated on image transducer.
This non-contact electronic accelerator device based on image of the present invention, the rotation that described image plate can rotation around the shaft is gas pedal is limited, for this reason, when gas pedal is rotated, described image plate will rotate together, but the rotation of image plate will cause the variation of evaluate image imaging on image transducer on the image plate, although changing, the angle of this variation and gas pedal do not have direct linear relationship, but there is definite non-linear relation in the two, this is different from the non-contact electronic accelerator device of the magneto sensitive element of prior art as angle transducer, in non-contact electronic accelerator device at magneto sensitive element as angle transducer, when the angle of gas pedal changes, the relative position of Hall element and magnetic field carrier is corresponding to change, there is simple linear relationship in the angle variation of this change in location and gas pedal, but the caused changes of magnetic field of this change in location be between the two a kind of complexity and immeasurable non-linear relation in some cases, influence factor is a lot, the influence factor that comprises external environment condition, for this reason, need could obtain through complicated processing the linearity output of Hall element.In the present invention, but using the imaging of the evaluate image after changing as the basis of processing, and but there is simple, measurable, that determine, that available trigonometric function an is expressed non-linear relation in the angle variation of the imaging of the evaluate image after this variation and gas pedal, this variation comprises the variation of position and the dimensional changes of shape, the rotation angle of the variation of this position and the dimensional changes of shape and gas pedal also has definite measurable non-linear relation, and this definite mensurable non-linear relation is not to be subject to external environment influence simultaneously.The dimensional changes of the variation of this position and shape is through the simple process of assessment unit for this reason, can obtain direct linear output character, simultaneously, this non-contact electronic accelerator device based on image, also return to have kept away to adopt magneto sensitive element to be subject to external environment condition as the non-contact electronic accelerator device of angle transducer, as the problem of magnetic interference.In addition, on precision, because the size calculation accuracy based on image can have been done very highly, for this reason in the code-disc size situation of a size in the photoelectric code disc type non-contact electronic accelerator device of image board size size and prior art, the present invention is can getable output accuracy much higher.
As preferably, the figure assessed on described image plate is the gray scale figure, and the image imaged on image transducer is gray level image, colorful image carries too much information, but the system resource that the colorful image of usining need to expend as evaluate image is too much, processing time efficiency is not high, but using gray level image, as evaluate image, can meet requirement of the present invention, has improved again the efficiency of system.
As further preferred, the figure assessed on described image plate, be black and white pattern.The present invention is that the size can assess the imaging of figure on image transducer is calculated as basis, for the size that can assess the imaging of figure on image transducer, calculate, the extraction on border is important link, and the key factor that affects Boundary Extraction is the contrast of object, in the image of realizing, the contrast maximum be black and white picture, its gradation of image presents obvious bimodal pattern, be conducive to like this extraction on size border, be conducive to the calculating of size, the efficiency of favourable elevator system.
As preferably, described image processing module comprises pre-filtering noise reduction module and border detection operator module, and the input of described pre-filtering noise reduction module is connected to image transducer, and output is connected to the border detection operator module.But the dimension survey most critical of evaluate image is Target Segmentation and Boundary Extraction.But in generation, transmission and the conversion of image, due to the impact of many factors, often make between image and original scenery or produce some difference between original image, Here it is becomes bad.The change of image is bad to make to obtain various information from image and causes difficulty and inconvenience.The bad feature of the topmost change of picture size measuring system is picture noise.Comprise in optical imagery and sampling process many noise source interference such as often there will be aliasing noise, insertion noise, jittering noise, electron noise.And edge detection is more responsive to noise ratio, therefore need to before detecting, to image, carry out the filtering noise reduction process, the present invention that Here it is arranges the purpose of pre-filtering noise reduction module.
The filtering noise reduction module is divided into linear filtering and the large class of nonlinear filtering two.Although linear filtering has smoothing effect preferably to Gaussian noise, poor to other noise suppression effects, and can fuzzy edge.And the medium filtering in nonlinear filtering can also well be protected the edge profile information in filtered noise.It is very useful, particularly particularly effective for binary noise to the interference of eliminating isolated point and line segment.But this point physical dimension to evaluate image according to the invention is especially measured the demand of edge precision positioning, so, as further improving, described filtering noise reduction module of the present invention adopts median filter.
Border detection operator module in described image processing module, its function is to determine the border that can assess the imaging of figure on image transducer, so that assessment unit driven dimension, as preferably, described border detection operator module adopts the Sobel operator, and described Sobel operator is the differential operator of taking the single order of weighted mean filtering, and the low noise image of gray scale gradual change is had and detects preferably effect, processing rate is fast, relatively is applicable to applied environment of the present invention.
In the present invention, when parallel with the rotational plane of image plate on the plane of image plate of the present invention, described assessment unit can be calculated as basis can assess figure size of imaging on image transducer to the calculating of gas pedal rotation angle, the impact point that can assess on figure of can take is calculating object, we can assess the imaging of figure on image transducer and be defined as initial imaging before gas pedal is not rotated, imaging after rotation is defined as the change imaging, described impact point has a position in initial imaging, after gas pedal is rotated an angle, in the earthquake imaging of described impact point position, a position is also arranged, described initial imaging and change imaging stack are merged into to a sub-picture, on image after this stack merges, will there be a displacement impact point position of initial imaging with the impact point interdigit of change imaging, obviously, there are specific trigonometric function relation in described displacement and gas pedal rotation angle, this two objects point of take is border, the displacement calculating value, can obtain the rotation angle of gas pedal.In the present invention, it is calculating object that described assessment unit be take the impact point that can assess on figure, and described initial imaging and change imaging stack are merged into to a sub-picture, and take initial imaging the impact point position with the change imaging the impact point position be the size border, the displacement calculating value, and convert the rotation angle of gas pedal to.
When parallel with the rotational plane of image plate on the plane of image plate, but this sample loading mode of displacement of the imaging on image transducer by calculating evaluate image is carried out the rotation angle of calculation of throttle pedal, although comparatively simple, but, because the distance of described displacement is limited, the precision of calculating is had a certain impact.For this reason, in the present invention, as preferably, can adopt the plane of described image plate to be not parallel to the technological scheme of image plate rotational plane, to adapt to the more situation of requirements for high precision.In this case, described change imaging size dwindles in the horizontal by a certain percentage, can to take the horizontal boundary that can assess the imaging of figure on image transducer be calculating object to assessment unit for this reason, before gas pedal is rotated, we are defined as initial imaging can to assess the imaging of figure on image transducer.Corresponding, the horizontal boundary of initial imaging is defined as initial imaging size apart from us, the horizontal boundary distance of initial imaging, be that initial imaging size is a definite value after product export or after system calibrating, can process as constant in system, that is to say, after product export or after system calibrating, initial imaging size is demarcated as to definite value, in system, as constant, process, but the processing rate of elevator system like this.
The image plate is after rotation, because the image plate has rotated an angle, we are defined as the change imaging by the figure the assessed imaging on image transducer on it after angle of image plate rotation, and the horizontal boundary of corresponding change imaging is defined as the change imaging size apart from us.In the situation that the plane of image plate is not parallel to image plate rotational plane, this change imaging size dwindles in the horizontal by a certain percentage, so just can change the rotation angle data that imaging size and initial imaging size and the difference of these two carry out the calculation of throttle pedal by calculating.The benefit of processing like this is, because the radix calculated will be far longer than the comparable situation that position is put in front and back, higher relative accuracy is arranged for this reason.Generally, it is calculating object apart from maximum boundary distance that assessment unit can be take initial imaging and change imaging transverse, and the highest calculation accuracy is arranged like this.
As further improving, described assessment unit also comprises a sized data storehouse, data in described sized data storehouse comprise the sized data row and are listed as gas pedal rotation angle data one to one with sized data, and all by certain precision setting, assessment unit can be assessed the size of figure imaging on image transducer and the sized data in the sized data storehouse is contrasted, for example, the change imaging size data of the figure the assessed imaging on image transducer after assessment unit rotates the image plate and the sized data in the sized data storehouse compare, can directly draw gas pedal rotation angle data.The mode system of processing has like this been removed some complicated computational processes from, and higher processing rate will be arranged.
As further preferred, described assessment unit comprises the standard code picture library, standard code figure in described standard code picture library is corresponding one by one with the gas pedal rotation angle, the described assessment on figure comprises identifying code figure, and using the identifying code figure code figure imaging that imaging forms on image transducer of the figure assessed on the image plate as identifying code figure, in the present invention, described image plate rotates with gas pedal, therefore the imaging of the figure assessed on the image plate on image transducer will deform, the accelerator pedal angle difference, the imaging of the figure assessed on the image plate on image transducer is by difference, in like manner, identifying code figure also can deform, and become the identifying code figure that represents that another determines meaning by distortion, read this identifying code figure, directly and the standard code figure in the standard code picture library contrasted, can directly obtain the rotation angle of gas pedal.Simultaneously this result can be calculated as basic data and supports the use with assessing figure size of imaging on image transducer, checking mutually.
The accompanying drawing explanation
The surface structure schematic diagram of a kind of non-contact electronic accelerator device gas pedal based on image that Fig. 1 provides for preferred embodiment one of the present invention when initial position.
A kind of non-contact electronic accelerator device gas pedal based on image that Fig. 2 provides for preferred embodiment one of the present invention is rotated the surface structure schematic diagram after an angle.
A kind of non-contact electronic accelerator device based on image that Fig. 3 provides for preferred embodiment one of the present invention is removed the internal structure schematic diagram after gas pedal.
Schematic diagram after the initial imaging of the figure assessed on image transducer on a kind of non-contact electronic accelerator device image plate based on image that Fig. 4 provides for preferred embodiment one of the present invention and change imaging stack.
A kind of non-contact electronic accelerator device system architecture diagram based on image that Fig. 5 provides for preferred embodiment one of the present invention.
A kind of non-contact electronic accelerator device based on image that Fig. 6 provides for preferred embodiment two of the present invention is removed the internal structure schematic diagram after gas pedal.
The figure assessed on a kind of non-contact electronic accelerator device image plate based on image that Fig. 7 provides for preferred embodiment two of the present invention.
A kind of non-contact electronic accelerator device based on image that Fig. 8 provides for preferred embodiment two of the present invention before gas pedal is not rotated, the initial imaging of the figure assessed on the image plate on image transducer.
A kind of non-contact electronic accelerator device based on image that Fig. 9 provides for preferred embodiment two after gas pedal is rotated an angle, the change imaging of the figure assessed on the image plate on image transducer.
A kind of non-contact electronic accelerator device system architecture diagram based on image that Figure 10 provides for preferred embodiment two of the present invention.
Can assess figure with identifying code figure on a kind of non-contact electronic accelerator device image plate based on image that Figure 11 provides for preferred embodiment three of the present invention.
On the image plate of a kind of non-contact electronic accelerator device based on image that Figure 12 provides for preferred embodiment three of the present invention with the figure assessed imaging on image transducer before gas pedal is not rotated of identifying code figure.
The imaging on image transducer after gas pedal is not rotated an angle of the figure assessed with identifying code figure on the image plate of a kind of non-contact electronic accelerator device based on image that Figure 13 provides for preferred embodiment three.
In each figure, 1 is gas pedal, 101 is the gas pedal rotating shaft, 2 is housing, 201 is horizontal line, 202 is pivoted arm, 203 is the image plate, 204 is optical apparatus, 205 is image transducer, 206 is light source body, 3 is assessment unit, 301 is image processing module, 3011 is the pre-filtering noise reduction module, 3012 is the border detection operator module, 302 is microprocessor, 303 is the sized data storehouse, 304 is output terminal, 305 is the standard code picture library, 4 for can assess figure, 43 is identifying code figure, 401 is initial imaging, 402 is the change imaging, 403 is code figure imaging, Φ is rotational angle, H is displacement, H1 is initial imaging size, H2 is the change imaging size.
Embodiment
Below with reference to the preferred embodiment of a kind of non-contact electronic accelerator device based on image provided by the invention and accompanying drawing thereof, the invention will be further described.
Embodiment one: a kind of non-contact electronic accelerator device based on image of this preferred embodiment, as accompanying drawing 1, accompanying drawing 2, shown in accompanying drawing 3, comprise gas pedal 1, image plate 203, light source body 206, image transducer 205, optical apparatus 204, assessment unit 3, described light source body 206 provides light source to image plate 203, described image plate 203 images on image transducer 205 by optical apparatus 204, in the present embodiment, described image plate 203 is fixed on the pivoted arm 202 with gas pedal rotating shaft 101 one, therefore the rotation of described image plate 203 is limited by the rotation of gas pedal 1, simultaneously, described image plate 203 arranges can assess the plane of figure 4 and the rotational plane of image plate 203, be that pivoted arm 202 rotates the plane parallel formed.In this preferred embodiment, the output of described image transducer 205 is connected to assessment unit 3, and described assessment unit 3 is processed for the image that image transducer 205 is generated, and determines the rotational angle Φ of gas pedal 1.
In this preferred embodiment, as shown in Figure 4, described image plate 203 is provided with point-like can assess figure 4 for point-like figure, its initial imaging formed on image transducer 205 is relevant to the rotational angle Φ of gas pedal 1 with the size of the displacement H of change imaging, there is specific trigonometric function relation in the rotational angle Φ that is described displacement H and gas pedal 1, be of a size of basis with displacement H and calculated, can obtain the rotational angle Φ of gas pedal 1.In this preferred embodiment, the described figure 4 of assessing is for black and white pattern.
In this preferred embodiment, as shown in Figure 5, described assessment unit 3 comprises microprocessor 302, simultaneously, described assessment unit 3 also comprises image processing module 301, described image processing module 301 comprises pre-filtering noise reduction module 3011 and border detection operator module 3012, and the input of described pre-filtering noise reduction module 3011 is connected to image transducer 205, and output is connected to border detection operator module 3012.In this preferred embodiment, described filtering noise reduction module 3011 adopts median filter, and described border detection operator module 3012 adopts the Sobel operator.
In this preferred embodiment, as previously mentioned, the plane parallel of described image plate 203 is in image plate 203 rotational planes, therefore the figure assessed 4 of take on the image plate on 203 initial imaging 401 and change imaging 402 on 205 on image transducer is calculating object.Carry out initial imaging 401 and the change imaging 402 after the noise reduction process through preposition filtering noise reduction module 3011 and will be merged into a sub-picture, then determined the border of the displacement H that will calculate by border detection operator module 3012, again by the value of microprocessor 302 displacement calculating H, and convert thereof into the rotation angle Φ value of gas pedal 1, finally by output terminal 306 outputs of microprocessor 302.
Embodiment two: a kind of non-contact electronic accelerator device based on image of this preferred embodiment, as accompanying drawing 6, shown in accompanying drawing 10, be that with embodiment one difference the plane of described image plate 203 is not parallel to image plate 203 rotational planes, be not parallel to pivoted arm 202 and rotate formed plane, as shown in Figure 7 simultaneously, described image plate 203 is provided with the figure assessed 4 of square box shape figure shape, as shown in Figure 8, can assess the initial imaging 401 of figure 4 on image transducer 205 on image plate 203 is also square block diagram shape, in this preferred embodiment, the horizontal boundary of the figure assessed 4 of take on the image plate on 203 imaging on 205 on image transducer is calculating object, as shown in Figure 8, before gas pedal 1 is not rotated, be before image plate 203 does not rotate, the horizontal boundary distance that in initial imaging 401, two vertical boundary frame lines of its horizontal boundary of formation limit is initial imaging size H1, this initial imaging size H1 is a determined value after product export or after demarcating, in system, can use as constant.As shown in Figure 9, after angle Φ of the rotation of image plate 203, change imaging 402 can have been dwindled on transverse dimension by a certain percentage with respect to initial imaging 401, at this moment, the horizontal boundary distance that in change imaging 402, two vertical boundary frame lines of its horizontal boundary of formation limit is change imaging size H2.
As shown in Figure 10, described assessment unit 3 comprises microprocessor 302, simultaneously, described assessment unit 3 also comprises image processing module 301, described image processing module 301 comprises pre-filtering noise reduction module 3011 and border detection operator module 3012, the input of described pre-filtering noise reduction module 3011 is connected to image transducer 205, and output is connected to border detection operator module 3012.In this preferred embodiment, described filtering noise reduction module 3011 adopts median filter, and described border detection operator module 3012 adopts the Sobel operator.In this preferred embodiment, image transducer 205 is sent into filtering noise reduction module 3011 by the initial imaging 401 collected with change imaging 402 and is carried out noise reduction process, then send into border detection operator module 3012 and carry out the border confirmation, the microprocessor 302 of finally inputting assessment unit 3 calculates initial imaging size H1 and change imaging size H2 and the two is poor, be convertible into the rotation angle Φ Value Data of gas pedal 1 by converting, these data are through output terminal 304 outputs of microprocessor 302 again.
As shown in Figure 10, in this preferred embodiment, described assessment unit 3 also comprises a sized data storehouse 303, data in described sized data storehouse 303 comprise sized data row and angle-data row, data in described sized data row and angle-data row have one-to-one relationship, simultaneously, data in described angle-data row and the actual rotation angle Φ value of gas pedal 1 also have one-to-one relationship, and all by certain precision setting, assessment unit 3 can be assessed the size of figure 4 imaging on image transducer 205 and the sized data in sized data storehouse 303 is compared, for example, the change imaging size H2 of the figure assessed 4 imaging on image transducer 205 after assessment unit 3 rotates image plate 203 and the data in the row of the sized data in the sized data storehouse compare, after finding out the correspondingly-sized data, can find the angle-data in the angle-data row corresponding with this sized data, these data are gas pedal 1 rotational angle Φ value.Output terminal 304 output gas pedal 1 rotational angle Φ values finally by microprocessor 302.The mode system of processing has like this been removed some complicated computational processes from, and higher processing rate will be arranged.
Embodiment three: a kind of non-contact electronic accelerator device based on image of this preferred embodiment, with the difference of a kind of non-contact electronic accelerator device based on image of implementation column two, be, described assessment unit 3 comprises standard code picture library 305, code figure in described standard code picture library 305 is corresponding one by one with the rotation angle Φ of gas pedal 1, simultaneously, as accompanying drawing 11, accompanying drawing 12, shown in accompanying drawing 13, the described assessment on figure 4 comprises identifying code Figure 43, and can assess the identifying code Figure 43 imaging generated code figure imaging 403 on image transducer 205 in figure 4 on image plate 203, in this preferred embodiment, described image plate 203 rotates with gas pedal 1, because the situation with in embodiment two is the same, the plane of described image plate 203 is not parallel to image plate 203 rotational planes, therefore lateral deformation will occur in the imaging of the figure assessed 4 on image transducer 205 on image plate 203, the rotation angle Φ difference of gas pedal 1, the imaging of the figure assessed 4 on image transducer 205 on image plate 203 is by difference, in like manner, the code figure imaging 403 of identifying code Figure 43 also can deform, become the code figure imaging 403 that represents that another determines meaning by distortion, simultaneously assessment unit 3 is can assess identifying code Figure 43 code figure imaging 403 that imaging forms on image transducer 205 in figure 4 object as a comparison on image plate 203, assessment unit 3 reads this yard figure imaging 403, and a code figure of 305 in this yard figure imaging 403 and standard code picture library is contrasted, directly obtain the rotational angle Φ value of gas pedal 1.And output terminal 304 outputs by microprocessor 302 by this rotational angle Φ value.Preceding method can be applied separately, also can with embodiment two in be calculated as basic data with size and support the use, checking mutually, further to improve reliability and Security.
Claims (7)
1. the non-contact electronic accelerator device based on image, for determining the rotation angle of gas pedal, described a kind of non-contact electronic accelerator device based on image, comprise gas pedal, the image plate, light source body, image transducer, optical apparatus, assessment unit, described light source body provides light source to the image plate, described image plate images on image transducer by optical apparatus, described image plate can rotate around the axis, the rotation that described image plate can rotation around the shaft is gas pedal is limited, the output of described image transducer is connected to assessment unit, described assessment unit is processed for the gray level image that image transducer is generated, determine the rotation angle of gas pedal, described assessment unit comprises microprocessor, it is characterized in that, comprise and can assess figure on described image plate, the described figure of assessing is to assess the black and white rectangular graph, described assessment unit at least comprises assessing the figure image processing module that the gray level image size of imaging is calculated on image transducer.
2. a kind of non-contact electronic accelerator device based on image according to claim 1, it is characterized in that described image processing module comprises pre-filtering noise reduction module and border detection operator module, the input of described pre-filtering noise reduction module is connected to image transducer, output is connected to the border detection operator module, described filtering noise reduction module adopts median filter, and described border detection operator module adopts the Sobel operator.
3. a kind of non-contact electronic accelerator device based on image according to claim 2, the plane that it is characterized in that described image plate is parallel with the rotational plane of image plate, and it is calculating object that described assessment unit be take the impact point that can assess on figure, and initial imaging and change imaging stack are merged into to a sub-picture, and take initial imaging the impact point position with the change imaging the impact point position be the size border, the displacement calculating value, and convert the rotation angle of gas pedal to.
4. a kind of non-contact electronic accelerator device based on image according to claim 2, the plane that it is characterized in that described image plate is not parallel to image plate rotational plane, it is calculating object that assessment unit be take the horizontal boundary that can assess the imaging of figure on image transducer, calculate initial imaging size and change the poor of imaging size, and being converted to the rotation angle data of gas pedal.
5. a kind of non-contact electronic accelerator device based on image according to claim 4, it is characterized in that after product export or after system calibrating, initial imaging size be demarcated as to definite value, in system, as constant, process, to take initial imaging and change imaging transverse be calculating object apart from the maximum boundary distance to assessment unit simultaneously.
6. a kind of non-contact electronic accelerator device based on image according to claim 2, it is characterized in that described assessment unit also comprises a sized data storehouse, data in described sized data storehouse comprise sized data row and angle-data row, data in described sized data row and angle-data row have one-to-one relationship, simultaneously, data in described angle-data row and the rotational angle value of gas pedal also have one-to-one relationship, and all by certain precision setting, assessment unit can be assessed the size of figure imaging on image transducer and the sized data in the sized data storehouse is compared, draw the gas pedal rotational angle.
7. a kind of non-contact electronic accelerator device based on image according to claim 1, it is characterized in that described assessment unit comprises the standard code picture library, code figure in described standard code picture library is corresponding one by one with the rotational angle of gas pedal, the described assessment on figure comprises identifying code figure, can assess the identifying code figure imaging generated code figure imaging on image transducer in figure on described image plate, described assessment unit is can assess identifying code figure in the figure code figure imaging that imaging forms on image transducer object as a comparison on the image plate, assessment unit reads this yard figure imaging, and the code figure in this yard figure imaging and standard code picture library is contrasted, obtain the rotational angle value of gas pedal.
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| CN102980596A (en) * | 2012-11-19 | 2013-03-20 | 上海航盛实业有限公司 | Electronic accelerator pedal magnetic field mechanism of Hall effect |
| CN110196130B (en) * | 2019-05-28 | 2020-11-10 | 上海航天设备制造总厂有限公司 | Slip ring electric brush contact pressure detection method based on image processing |
| CN112164021A (en) * | 2020-08-12 | 2021-01-01 | 中国科学院西安光学精密机械研究所 | Image measuring method and device for spacecraft load vibration |
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| US5049742A (en) * | 1989-11-16 | 1991-09-17 | Kyodo Oil Technical Research Co., Ltd. | Apparatus for detecting deterioration of engine oil |
| CN1367754A (en) * | 1999-08-26 | 2002-09-04 | Otm技术有限公司 | Edge detector |
| CN101105392A (en) * | 2006-07-12 | 2008-01-16 | 欧姆龙株式会社 | Displacement sensor |
| CN201397127Y (en) * | 2009-04-24 | 2010-02-03 | 长安大学 | Automotive brake pedal travel measurement system |
| CN201821451U (en) * | 2010-08-04 | 2011-05-04 | 长安大学 | Measuring device for driver pedal operation |
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