CN201026858Y - Optical grating digital system observing and controlling device of windshield wiper - Google Patents
Optical grating digital system observing and controlling device of windshield wiper Download PDFInfo
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- CN201026858Y CN201026858Y CN 200620160113 CN200620160113U CN201026858Y CN 201026858 Y CN201026858 Y CN 201026858Y CN 200620160113 CN200620160113 CN 200620160113 CN 200620160113 U CN200620160113 U CN 200620160113U CN 201026858 Y CN201026858 Y CN 201026858Y
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Abstract
The utility model discloses a measurement and control device for grating digital type automatic rain brush system. The measurement and control device comprises a light0proof board, and the bottom of the light-proof board is provided with two geometry via holes with specific distance; two optical transparent objects, which are respectively arranged in the two via holes of the light-proof board and are glued within the scraping and sweeping range of the rain brush on the inner surface of windshield; an integrated light source and an integrated inductor; a digital pulse measurement and control circuit board that is provided with a digital pulse measurement and control circuit, and the digital pulse measurement and control circuit receives rainfall signal from the integrated inductor and sends out rain brush control signal after data processing; wherein, a plurality of narrow and parallel beams that are in the same distance and transmitted by the integrated light source are projected onto the outer surface of the windshield via the corresponding transparent object and arise total reflection; a plurality of unit reflection light paths that are independent with each other are formed after a plurality of total reflection on the inner and the outer surface of the windshield, and grating type sensing surface is formed; a plurality of optical signals with rainfall information is reflected by the grating type sensing surface and is transformed into a plurality of electric signals by the integrated inductor, and the electric signals are output to the digital pulse measurement and control circuit. The measurement and control device has the performances of large sensing area and high measurement precision.
Description
Technical field
The utility model relates to the automatic Wiper system controller of a kind of photoelectricity, relates in particular to a kind of automatic Wiper system controller of automobile that is used for.
Background technology
Vehicle intellectualized has been the forward position of automobile industry development, and vehicle safety and hommization particularly manufacturer and user are paid close attention to.Automatically Wiper system is the important component part of automotive safety, and its core is a rain sensor.In its invention history, various principle schemes such as metal gauze, electronics, sound equipment, humidity, electric capacity, shooting, photoelectricity are arranged.Until in recent years, new photo-electric rain sensor occurs, and has only famous automobile vendor of several families to select for use in the world, begins to have disposed automatic Wiper system on the middle and high shelves of part automobile.
At present, the rain sensor of automotive use.Be on windshield, install one to several to light-beam transmitter and inductor, on Windshield, generate sensitive face by optical system, light takes place when raindrop adhere to be leaked, cause receiving light power to change, be converted to the variation of electrical signal of reaction and perception rain condition and control the rain brush swing and scrape water, thereby guarantee the visibility of Windshield.
Because this kind rain sensor comes out and period of service is not long, at present automobile-use rainfall sensing technology is still very unripe under the condition, has also that control sensitivity and precision are not enough, defectives such as functions of use defectiveness, misoperation rate height, complex structure, cost height, production and installation requirement height.The reason that causes is more, mainly be that sensor must be installed in rain brush and scrapes in the scope of sweeping, being subjected to the driver visual field to limit its volume can not be big, and the optical system that adopts lens, prism to constitute, not only accuracy requirement is high but also the size that takes up room is bigger, increases the sensing area and becomes a main bottleneck difficult problem because of the restriction of small space makes.The existing effective sensing area of sensor only reaches the 1-2 sq cm, dutycycle about 0.1.During owing to rain raindrop distribute be at random, uneven, raindrop drop in the detecting area that sensitive face is outer to cause detecting error with regard to causing omission.Sensing area and dutycycle be more little, and then to detect error big more, is to cause the basic reason that detection accuracy is not enough, rain brush is slow in reacting, the misoperation rate is high.It is ineffective to select for use collection of simulant signal processing mode, external interference to get rid of, and also is one of reason.Many patents lay particular stress on theoretical scheme and ignore in-use performance and production, installation, maintenance condition, also have that rain brush is driedly scraped, non-dismountable, structure and complex process etc., all are that problem to be solved is arranged.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides that a kind of sensing area is big, accuracy of detection is higher, has than the numeral of consummating function Wiper system controller automatically.
The purpose of mainly founding of the present utility model is: utilize integrated optical source and this cluster reduced form of integrated induction device assembly to generate larger area Grating Digital formula sensitive face (having higher dutycycle), its intensive arrowband sensitive face can be surveyed tiny raindrop, and can survey the size of raindrop, simultaneously, larger area Grating Digital formula sensitive face reduces the detection error, thereby the detection sensitivity of making, accuracy and observing and controlling precision are significantly improved.
Other purpose of the utility model is: (1) utilizes and multistagely multiplely reaches the influence of thorough elimination bias light, temperature and electromagnetic interference as electronics methods such as optical instrument such as light hurdle, filter, thin narrow light path and pulse bandwidth filtering, raising signal to noise ratio, digitalisations, improves the stability and the reliability of work; (2) utilize microprocessor program control and employing and original manual Wiper system parallel way, substantially do not changing under the situation of original device, realize the two-stage slew rate of rain brush and the stepless automatically regulating of wobble frequency, the Wiper system to buncher can simplyr transfer the rain brush automatic stepless speed-regulating to; (3) adopt a kind of hommization measure, utilize simple micro-switch, realize fine-tuning degree of getting a clear view of driver and rain brush hunting frequency, to improve the applicability and the traveling comfort of different drivers by microprocessor; (4) utilize the deep development of microprocessor program, increase an anti-dried function of scraping, in order to avoid starting for the first time take place because of rainwater is not enough dried scrape may, to solve the protection problem of Windshield and Wiper system; (5) utilize simple, the good characteristics of transferring of digital circuit, add optimization to light, electric system, finally remove expensive lens, prism and optical focusing thereof and transferred the precise adjustment requirement of axle, substantially the simplification technological process that having realized producing and install not must light, electricity is adjusted, make it to have simple in structure, with low cost, production and easy for installation, the advantage that is particularly suitable for producing in enormous quantities.
Provide a kind of Grating Digital formula automatic Wiper system controller according to the utility model, described controller comprises:
Anti-dazzle device, it is nontransparent U template, and the bottom surface is provided with two geometric configuration through holes with preset space length, and described anti-dazzle device is bonded in rain brush and scrapes on the inside face of the Windshield in the scope of sweeping;
Two optical transparent bodies, it is the wedge that two logical light masks have certain angle, splits in two through holes of anti-dazzle device, is adhesive on the inside face of Windshield;
Integrated optical source comprises a plurality of unit light source, can launch many uniformly-spaced parallel arrow beam of lights of optical axis;
The integrated induction device comprises a plurality of unit inductor, has the parallel narrow reception visual field, unit of a plurality of uniformly-spaced optical axises;
Digital polse telemetry circuit plate which is provided with the digital polse telemetry circuit, after the rainfall signal of digital polse telemetry circuit reception integrated induction device carries out data handing, and output rain brush control signal;
Wherein, integrated optical source and integrated induction device are respectively towards the inclined-plane, two outsides of described two optical transparent bodies, and be electrically connected with digital polse telemetry circuit on the described circuit card and fixing, many the arrow beam of lights that uniformly-spaced are parallel to each other of integrated optical source emission by towards the transparent body project the outside face generation total internal reflection of Windshield, in Windshield, outside face repeatedly total internal reflection forms many separate unit reflected light roads, thereby on the Windshield outside face, form the many sensing arrowbands, unit that uniformly-spaced are parallel to each other, constitute the raster pattern sensitive face, reflect a plurality of optical signals that have rainfall information from the raster pattern sensitive face, arrive the parallel narrow reception visual field, unit of described a plurality of uniformly-spaced optical axis by another transparent body, change a plurality of electric signal into by the integrated induction device, and export to the digital polse telemetry circuit.
When not having raindrop on the sensing arrowband, unit, this pairing arrow beam of light in sensing arrowband, unit throws the narrow reception visual field, unit that cooresponding a plurality of uniformly-spaced optical axises of integrated induction device into are parallel to each other by another transparent body after total internal reflection repeatedly, when on the sensing arrowband, described unit raindrop being arranged, its light path is interdicted because of refraction takes place raindrop, and its cooresponding unit inductor does not have received signal.
Preferably, the described transparent body is provided with filter, in order to eliminate the bias light in the light beam.
Preferably, described a plurality of unit inductor is more than 4 unit inductors, and described a plurality of unit light source is more than 4 unit light sources.
Described digital polse telemetry circuit comprises microprocessor, program-controlled switching circuit, digital spc filter amplification circuit, microprocessor sends digital pulse signal to program-controlled switching circuit, many pulsed light beams of control integrated optical source sequential firing, the digital spc filter amplification circuit receives a plurality of electric signal of integrated induction device output, and in the filtering light beam after the noise signal of remaining bias light, by microprocessor follow procedure scanning collection and after the digital adaptation algorithm process output by the different control actuation signal of rainfall decision.
Fast or slow-speed actuation signal by microprocessor output by the rainfall decision, by original fast, the slow relay of vehicle, the startup Wiper motor is swung and is finished soon or slowly with fast or slow-speed drive rain brush and once scrapes the hydrodynamic(al) work, because rainfall determines the adjacent pitch time of scraping water for twice, and be continually varying, thereby realize pressing the step-less adjustment that the rainfall size is selected two kinds of rain brush slew rates and corresponding wobble frequency automatically.
Described digital polse telemetry circuit also comprises trimming circuit, described trimming circuit is connected with a fine motion reset button switch, can revise rain brush via trimming circuit by the hand reset button and start threshold value E, wherein E judges whether that the raindrop that start rain brush count threshold value.
Setting Q, P is that raindrop are counted predetermined value, and Q and P are respectively the fine setting base value and the fine setting step pitches of trimming circuit, and the driver presses number of times input coefficient n, then E=Q+nP by the fine motion reset button.
If F counts threshold value for the not dried raindrop of blowing, described microprocessor calculates the raindrop period cumulative number Bm of one of scanning and the long duration raindrop cumulative number C of scanning k field
K, as Bm＞E and C
KWhen＞F all satisfied, microprocessor can be exported the control signal that starts rain brush.
Technique scheme of the present invention causes the production efficiency of whole controller to improve, and reduces the cost of unit controller, and is easy to use, overcome the shortcoming that controller exists in the above-mentioned prior art of pointing out well.
Description of drawings
Fig. 1 is the side cutaway view of the utility model structure
Fig. 2 is integrated optical source of the present utility model and integrated induction device scheme drawing
Fig. 3 is that raindrop of the present utility model are surveyed the light path scheme drawing
Fig. 4 is Grating Digital formula sensitive face of the present utility model and raindrop scheme drawing
Fig. 5 is a digital polse detection circuit block diagram of the present utility model
Fig. 6 is the flow chart of steps of the utility model microprocessor processes rainfall electric signal
For understanding the present invention better, the invention will be further described below in conjunction with the drawings and specific embodiments.
The specific embodiment
As shown in Figure 1 and Figure 2, the utility model controller includes anti-dazzle device 8, two transparent bodies 4 and 5, integrated optical source 2, integrated induction device 3, digital polse telemetry circuit 7, filter 6, Windshield 1.Anti-dazzle device 8 is the nontransparent U template of bottom surface geometric configuration through hole that two specific distance are arranged, the light hurdle that the is used as optical system locating support of holding concurrently; Two transparent bodies 4 and 5 are optical object, and it is the wedge that two logical light faces have certain angle, light during by wedge direction change so that the total internal reflection luminous energy in the cowl is by two transparent body incident and outgoing; Integrated optical source 2 is the assembly of a plurality of unit light source, can launch many uniformly-spaced parallel arrow beam of lights of optical axis; Integrated induction device 3 is the assembly of a plurality of unit inductor, has the parallel narrow reception visual field, unit of a plurality of uniformly-spaced optical axises.
Bonding anti-dazzle device 8 on the inside face of the Windshield 1 in rain brush is scraped the scope of sweeping, two transparent bodies 4 and 5 split in two through holes of anti-dazzle device 8, being adhesive in rain brush scrapes on the inside face of the Windshield 1 in the scope of sweeping, integrated optical source 2 and integrated induction device 3 place in the anti-dazzle device by the fixed angle of customised design, make integrated optical source 2 and integrated induction device 3 inclined-plane, two outsides towards two transparent bodies 4 and 5, and electrically connect with digital polse telemetry circuit 7 respectively, digital polse telemetry circuit (plate) 7 is bonded in the U type top of anti-dazzle device 8.Owing to adopt the shape and size positioning action of anti-dazzle device 8 accurately, many the arrow beam of lights that uniformly-spaced are parallel to each other that integrated optical source 2 is launched project the outside face generation total internal reflection of Windshield 1 by the transparent body 4, through glass board 1 inside and outside surface repeatedly after the total internal reflection, earlier, the back enters narrow reception visual field, integrated induction device 3 cooresponding a plurality of unit that uniformly-spaced are parallel to each other by filter 6 and 5 projections of another transparent body.Eliminate bias lights by means of the through hole light hurdle on the anti-dazzle device 8 and filter 6, add that what select for use is thin arrow beam of light and visual field, makes it to constitute many separate unit reflected light roads 11.
As shown in Figure 3, Figure 4, many unit reflection Cheng Guanglu 11 form the many sensing arrowbands, unit 15 that uniformly-spaced are parallel to each other on Windshield 1 outside face, constitute Grating Digital formula sensitive face 10.
Drop on when raindrop 14 on the Grating Digital formula sensitive face 10 of Windshield 1, transmittance takes place because of variations in refractive index in the sensing arrowband face 15 that adherent surface occupied of raindrop 14, the emission refraction of light of the unit 12 under this sensing arrowband 15 is gone in the water droplet 14, affiliated unit reflected light road 15 is interdicted, under unit inductor 13 no received signals, be 1 (deny person be not 0) by the microprocessor count of digital polse telemetry circuit 7.The sensing arrowband number that raindrop adhere to is a cumulative number, and raindrop sizes and what its correspondence, and the unit time, interior total cumulative number was that the period cumulative number is then corresponding to rainfall.
As shown in Figure 5, be the structure of digital polse telemetry circuit and the signal processing flow of microprocessor 17, described digital polse telemetry circuit comprises: microprocessor 17, program-controlled switching circuit 16, program control filtering amplifying circuit 18 and trimming circuit 19; Described trimming circuit 19 is fine adjustment signal input circuits, implement adjustment by the driver by the fine motion reset button to described predetermined threshold E, because the driver can change the size that starts threshold value E by trimming circuit 19, therefore can guarantee the Windshield visibility that the driver needs, and can not take place that rain brush is dried to be scraped.Microprocessor 17 sends digital pulse signal to program-controlled switching circuit 16, many pulsed light beams of control integrated optical source 2 emissions.Reflect a plurality of optical signals that have rainfall information from raster pattern sensitive face 10, behind filter 6 elimination bias lights, a plurality of optical signals that will be received by integrated induction device 3 change a plurality of rainfall electric signal into, send into program control filtering amplifying circuit 18, the further noise signal of the remaining bias light of elimination, and handle by 17 pairs of a plurality of rainfall electric signal of microprocessor, through the digital adaptation algorithm process, when period cumulative number Bm greater than starting threshold value E, satisfy long duration cumulative number C simultaneously
KGreater than not dried when scraping threshold value F ponding abundant, whether be greater than or less than desired speed recognition threshold W by rainfall period cumulative number Bm again, the fast or slow-speed actuation signal of output port 20 (or 21) output Wiper motor from microprocessor starts rain brush and scrapes water.
As shown in Figure 6, be the steps flow chart of microprocessor processes rainfall electric signal:
1.A
IjBe that each sensing arrowband raindrop are gathered number, i is the line scanning ordinal number, i.e. the serial number (SN) of each unit inductor scanning sample of integrated induction device, and span is 1 number to selected unit inductor; J is the frame scan ordinal number, and it is a frame that the integrated induction device is finished single pass, and corresponding to the sampling of whole arrowband sensitive face, span 1 is to m.
2.m be the frame scan number of times that is used to survey rain, constitute primary field scanning, m is a predetermined value, its value is relevant with system parameter.Bm is the sampling raindrop cumulative number of field scan period.
3.Q be the fine setting base value of being scheduled to, P is the fine setting stride value of being scheduled to, E judges whether that the raindrop that start rain brush count threshold value, determine by formula E=Q+nP, the driver presses number of times input coefficient n by the fine motion reset button, can revise threshold value E, realizes the fine setting to the rain brush action.
4.k be the anti-dried required field scan number of scraping, be predetermined value, C
kBe the raindrop cumulative number of scanning k head's period, η is a predetermined value less than k, F=η E; F is the anti-dried threshold value of scraping, and when Bm＞E, whether rain brush starts depends on and have or not enough rainwater on the Windshield, for avoiding the dried damage glass of scraping, need satisfy formula: C simultaneously
k＞F can start rain brush.Its actual effect is when initially raining, and does suitable time-delay according to the rainfall size, rainwater is accumulated just start rain brush when abundant, thereby avoid the dried of rain brush to scrape.Simultaneously, the driver can obtain the more clear visual field.
5.W be that the Wiper motor of being scheduled to is carried out recognition threshold fast, low-rotate speed, start the different rotating speeds of Wiper motor in order to difference.When Bm＞W, start the quick shelves of Wiper motor, otherwise start shelves at a slow speed.Because the rain brush wobble frequency depends on rain condition, the variation of wobble frequency is evenly stepless.Therefore, realize the two-stage of rain brush slew rate and the step-less adjustment of wobble frequency.
6. above-mentioned each predetermined value is set in advance by producer.Wherein:
Q---finely tunes base value; P---finely tunes step pitch; The W---rotary speed threshold value
M---field scan frame number; K---scans number of fields; The η---anti-dried coefficient of scraping.
Because the native system scheme can be removed lens, these precison optical components of prism and precision optics focusing, light modulation axle etc. and debug requirement, after adopting the enough anti-dazzle devices 8 of injection moulding process, batch manufacturing precision, realize producing and install not must light, electricity is adjusted, and makes designs simplification, cost reduce, be convenient to batch manufacturing.
The utility model is selected cheap material, simple structure and technology for use, adopts advanced raster pattern numeral rainfall sensing technology and digital polse telemetry circuit, makes vital sensing area increase several times, and observing and controlling precision and sensitivity are significantly improved.Because the step-less adjustment and the fine-tuning function of driver of anti-driedly scraping of adding rain brush, two-stage slew rate and wobble frequency all are improved significantly intellectuality, hommization and the applicability of automatic rain brush control, especially technological design is more suitable for production in enormous quantities.
By the processing of digital polse telemetry circuit, finish total cumulative number the time greater than different predetermined threshold, start automatically rain brush can sharply tuned different slew rates with the driver and wobble frequency scrape water, guarantee the Windshield visibility that the driver needs.Take place in the time of simultaneously avoiding starting that rain brush is dried to be scraped, cover glass and rain brush are injury-free.
Obviously, the present invention described here can have many variations, and this variation can not be thought and departs from the spirit and scope of the present invention.Therefore, the change that all it will be apparent to those skilled in the art all is included within the covering scope of these claims.
Claims (7)
1. automatic Wiper system controller of Grating Digital formula, described controller comprises:
Anti-dazzle device, it is nontransparent U template, and the bottom surface is provided with two through holes, and described anti-dazzle device is bonded in rain brush and scrapes on the inside face of the Windshield in the scope of sweeping;
Two optical transparent bodies, it is the wedge that two logical light faces have certain angle, splits in two through holes of anti-dazzle device, is adhesive in rain brush and scrapes on the inside face of the Windshield in the scope of sweeping;
Integrated optical source comprises a plurality of unit light source;
The integrated induction device comprises a plurality of unit inductor;
Digital polse telemetry circuit plate which is provided with the digital polse telemetry circuit, after the rainfall signal of digital polse telemetry circuit reception integrated induction device carries out data handing, and output rain brush control signal;
It is characterized in that, integrated optical source and integrated induction device are respectively towards the inclined-plane, two outsides of described two optical transparent bodies, and be electrically connected with digital polse telemetry circuit on the described circuit card and fixing, many the arrow beam of lights that uniformly-spaced are parallel to each other of integrated optical source emission by towards the transparent body project the outside face generation total internal reflection of Windshield, in Windshield, outside face repeatedly total internal reflection forms many separate unit reflected light roads, thereby on the Windshield outside face, form the many sensing arrowbands, unit that uniformly-spaced are parallel to each other, constitute the raster pattern sensitive face, reflect a plurality of optical signals that have rainfall information from the raster pattern sensitive face, arrive the parallel narrow reception visual field, unit of described a plurality of uniformly-spaced optical axis by another transparent body, change a plurality of electric signal into by the integrated induction device, and export to the digital polse telemetry circuit.
2. controller according to claim 1 is characterized in that: circuit card is bonded in the U type top of anti-dazzle device.
3. controller according to claim 1 and 2, it is characterized in that: the transparent body is provided with filter.
4. controller according to claim 3 is characterized in that: a plurality of unit inductor is more than 4 unit inductors, and described a plurality of unit light source is more than 4 unit light sources.
5. controller according to claim 4, the digital polse telemetry circuit comprises microprocessor, program-controlled switching circuit, program control filtering amplifying circuit, microprocessor sends digital pulse signal to program-controlled switching circuit, many pulsed light beams of control integrated optical source sequential firing, the program control filtering amplifying circuit receives a plurality of electric signal of integrated induction device output, and in the filtering light beam after the noise signal of remaining bias light, handle the control actuation signal of back output by microprocessor follow procedure scanning collection.
6. controller according to claim 5, it is characterized in that: by the fast or slow-speed actuation signal by the rainfall decision of microprocessor output, by original fast, the slow relay of vehicle, the startup Wiper motor is swung and is finished soon or slowly with fast or slow-speed drive rain brush and once scrapes the hydrodynamic(al) work.
7. controller according to claim 5 is characterized in that: the digital polse telemetry circuit also comprises trimming circuit, and described trimming circuit is connected with a fine motion reset button switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620160113 CN201026858Y (en) | 2006-11-29 | 2006-11-29 | Optical grating digital system observing and controlling device of windshield wiper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620160113 CN201026858Y (en) | 2006-11-29 | 2006-11-29 | Optical grating digital system observing and controlling device of windshield wiper |
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| CN201026858Y true CN201026858Y (en) | 2008-02-27 |
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| CN 200620160113 Expired - Fee Related CN201026858Y (en) | 2006-11-29 | 2006-11-29 | Optical grating digital system observing and controlling device of windshield wiper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819144A (en) * | 2010-05-06 | 2010-09-01 | 上海大学 | Automobile rainfall sensor |
| CN104215267A (en) * | 2013-05-30 | 2014-12-17 | 赫拉胡克公司 | Sensor device |
| CN104768809A (en) * | 2013-01-11 | 2015-07-08 | 康蒂-特米克微电子有限公司 | Illumination for the detection of raindrops on a window by means of a camera |
| CN109300286A (en) * | 2017-07-24 | 2019-02-01 | 长城汽车股份有限公司 | A kind of self-adapting detecting method and device |
-
2006
- 2006-11-29 CN CN 200620160113 patent/CN201026858Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819144A (en) * | 2010-05-06 | 2010-09-01 | 上海大学 | Automobile rainfall sensor |
| CN104768809A (en) * | 2013-01-11 | 2015-07-08 | 康蒂-特米克微电子有限公司 | Illumination for the detection of raindrops on a window by means of a camera |
| CN104215267A (en) * | 2013-05-30 | 2014-12-17 | 赫拉胡克公司 | Sensor device |
| CN104215267B (en) * | 2013-05-30 | 2018-06-01 | 赫拉胡克公司 | Sensor device |
| CN109300286A (en) * | 2017-07-24 | 2019-02-01 | 长城汽车股份有限公司 | A kind of self-adapting detecting method and device |
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Granted publication date: 20080227 Termination date: 20121129 |