CN2869955Y - Automobile intelligent defrosting controller - Google Patents
Automobile intelligent defrosting controller Download PDFInfo
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- CN2869955Y CN2869955Y CN 200520009921 CN200520009921U CN2869955Y CN 2869955 Y CN2869955 Y CN 2869955Y CN 200520009921 CN200520009921 CN 200520009921 CN 200520009921 U CN200520009921 U CN 200520009921U CN 2869955 Y CN2869955 Y CN 2869955Y
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- signal
- demist
- receiver
- demister
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Abstract
This utility model relates to an intelligent demisting controller for vehicles, which comprises signal transmitter, desired signal receiver, interfering signal receiver, amplifying circuit, comparator circuit and drive circuit for demisting device. The desired signal receiver converts the signal into electric signal and passes the electric signal to the subsequent amplifying circuit. After comparison with the interfering signal from the interfering signal receiver and removal of the interfering signal, the amplified desired signal is again sent to the comparator circuit for comparison with the threshold value to judge if the demisting device is to start or stop. The output signal of the comparator circuit is passed to the drive circuit of the demisting device to send on/off control signal to the demisting device. This controller automatically detects and identifies mist condensation on the windshield, automatically starts the demisting device to demist when needed and automatically stops the demisting device at the completion of demisting, indicating a high application value for safe driving.
Description
Technical field
The utility model relates to a kind of automobile demist technology.
Background technology
In vehicle traveling process, usually can run into the phenomenon that fog appears in the windshield face.This fog can influence driver's sight line, can make the driver can't see the situation of vehicle front clearly in the time of serious at all.Therefore, must in time remove the fog (hereinafter to be referred as " demist ") of windshield face, with guarantee driving safety.
At present, the method for demist has multiple.Such as: suitably open some vehicle windows, make the circulation of car inner air and outer air, reduce the car internal-external temperature difference, can eliminate the surface condensation fog in the windshield; Perhaps open the fog on the temperature elimination windshield in the air-conditioning adjusting compartment; Perhaps with towel or paper handkerchief wiping to reach the purpose of demist.
Though the effectively demist of these methods, in running car, these methods are made troubles to the driver also.When at terribly cold, the awfully hot weather of temperature, sleety weather or when running at high speed, it is worthless adopting the method for opening the vehicle window demist; Some driver is while driving with towel or paper handkerchief wiping demist, and being that driving is big avoids; Adopting air-conditioning air-supply demist, is the main means of present automobile demist.
Adopt air-conditioning air-supply demist, the driver only need open the just demist very easily of air-conditioning demist switch, but abominable at weather conditions, under the road conditions complicated situation, need frequent operation air-conditioning demist switch, can disperse driver's notice greatly, be unfavorable for safe driving.
Summary of the invention
The purpose of this utility model is the problem that exists in the existing demist technology, a kind of automobile intelligent demist controller is provided, automatically the windshield fog situation of condensing is surveyed and discerned realizing, and start the demister demist when needed automatically, when demist is finished, close demister again automatically, improve traveling security.
The technical solution used in the present invention is as follows:
This demist controller is to utilize visible light, laser, infrared ray, microwave or ultrasound wave at glass surface the principle that occurs different reflection strengths under mist and the situation of not having mist to be arranged, and the fog situation of condensing on vehicle glass surface is surveyed and discerned.With the infrared ray is example, does not have fog and has under the situation of fog at glass surface, and the ultrared intensity that same position detects can change, and by monitoring this change, just can determine whether glass surface fog occurred.When fog occurring, start demister and carry out demist; When fog weakens or disappear, then close demister.Whole process all realizes intelligence operation, need not driver's manual intervention.
The automobile intelligent demist controller that the utility model proposes comprises signal projector, the useful signal receiver, the undesired signal receiver, amplifying circuit, comparator circuit and demister driving circuit, the useful signal receiver sends follow-up amplifying circuit to after conversion of signals is become electric signal, compare by undesired signal with the undesired signal receiver, after eliminating undesired signal, the useful electric signal that amplifies imports comparator circuit again and threshold value compares, judge whether to start or close demister, the output signal of comparator circuit inserts the demister driving circuit, and demister is sent the ON/OFF control signal.
Wherein, the useful signal receiver is installed on the reflected path of detectable signal and the sensing signal receives reflected signal at incoming position on glass, or is installed near the reflected path of detectable signal and the sensing signal receives diffuse signal at incoming position on glass.Useful detectable signal shows as reflection of glass surface signal or diffuse signal.The undesired signal receiver is installed near the reflection paths of detectable signal and with detectable signal and keeps certain included angle to receive undesired signal in the direction of incoming position on glass.
The signal that the signal projector of above-mentioned controller and receiver utilize is selected visible light, laser, infrared ray, microwave or ultrasound wave.
This controller can select to use reflectometry or diffuse reflection method to carry out the automatic control that vehicle glass has the identification of mist and no vaporific attitude and realizes demister:
With the infrared ray is example, reflective automobile intelligent demist controller principle as shown in Figure 1, launch infrared ray by infrared transmitter to windscreen surface, receiver is installed in the position that can receive reflected infrared under the normal condition (being the situation that glass surface does not have fog), and this moment, infrared ray was received by receiver through after the reflection of glass surface.When glass surface did not have fog, the infra-red intensity that infrared receiver receives was maximum relatively; When glass surface had fog to condense, the infra-red intensity that infrared receiver receives weakened relatively, and when arriving to a certain degree a little less than the infra-red intensity that receives, after the situation of condensing of fog was judged, demisters such as startup air-conditioning carried out demist.Otherwise along with the carrying out of demist process, the infra-red intensity that infrared receiver receives strengthens gradually, when the fog of glass surface is attenuated to a certain degree, the infra-red intensity that then receives also is strengthened to analog value, and think then that glass surface fog eliminates, then closes corresponding demister this moment.
For shown in Figure 2 be the principle of diffuse reflection type automobile intelligent demist controller, launch infrared ray by infrared transmitter to windscreen surface, receiver is installed in the position that can not receive reflected infrared under the normal condition (being the situation that glass surface does not have fog).When glass surface did not have fog, the infra-red intensity that infrared receiver receives was minimum relatively; When glass surface had fog to condense, infrared ray diffuse reflection can occur at glass surface, and at this moment, infrared receiver just can receive the infrared ray of certain intensity, and after the situation of condensing of fog was judged, started demister and carry out demist this moment.Otherwise along with the carrying out of demist process, the infra-red intensity that infrared receiver receives is attenuated to a certain degree, can think that then glass surface fog eliminates, then closes corresponding demister.Whole process all realizes intelligence operation, need not the driver intervene.
This shows, the automobile intelligent demist controller that the utility model proposes can be realized the windshield fog situation of condensing is surveyed and discerned automatically, and can start the demister demist when needed automatically, when demist is finished, close demister again automatically, have great using value for safe driving.
Description of drawings
The schematic diagram of the reflective automobile intelligent defrosting control of Fig. 1;
The schematic diagram of Fig. 2 diffuse reflection type automobile intelligent defrosting control;
Fig. 3 automobile intelligent demist controller is formed synoptic diagram;
The schematic diagram of Fig. 4 infrared transmitter;
The schematic diagram of reception of Fig. 5 infrared ray and amplifying circuit;
The schematic diagram of Fig. 6 comparator circuit.
Embodiment
Be elaborated below in conjunction with the specific implementation of accompanying drawing to method of the present invention and controller:
Fig. 3 has provided the composition synoptic diagram that embodies a kind of automobile intelligent demist controller of the inventive method, and it is made up of signal projector, signal receiver (including with signal receiver and undesired signal receiver), amplifying circuit, comparator circuit and demister driving circuit.Signal projector is the detectable signal emissive source, and the detectable signal that sends can be visible light, laser, infrared ray, microwave or ultrasound wave; The useful signal receiver receives the detectable signal of interior surfaces of glass reflection (reflective) or diffuse reflection (diffuse reflection type), and the detectable signal that receives is converted to electric signal, and the electrical signal converted size changes with the variation of the detectable signal that receives; The undesired signal receiver receives the undesired signal of external environment and is converted into electric signal, and the electric signal that amplifying circuit is changed out receiver is eliminated undesired signal and amplified and obtains useful signal; The useful electric signal and the threshold value of reflection of glass surface (reflective) that the expression receiver after comparator circuit will amplify receives or diffuse reflection (diffuse reflection type) detectable signal size compare, thereby judge whether to start or close demister.Demister driving circuit among Fig. 3 is common relay or photoelectrical coupler.Demister can be air conditioning for automobiles.
Below be a kind of specific implementation circuit that example provides automobile intelligent demist controller with the infrared signal:
1, the circuit of infrared transmitter is realized: in the infrared transmitter, adopt three terminal regulator 7805 with automobile storage battery+the 12V direct supply is converted to+the 5V direct supply is a circuit supply.+ 5V direct supply at first links to each other with the anode of infrarede emitting diode IR-LED by a resistance R 1, and the negative terminal of infrarede emitting diode links to each other with power supply ground.Desirable 100 Ω of the representative value of resistance R 1 (its value is according to the type decided of selected infrarede emitting diode).At this moment, infrared ray is sent in infrarede emitting diode work.
2, the circuit of infrared receiver (including with signal receiver and undesired signal receiver) is realized
The infrared light that Fig. 4 sends can be carried out the reception and the amplification of signal by infrared radiation receiving circuit shown in Figure 5 after reflecting (or diffuse reflection) through the windshield inside surface.Infrared receiving tube VD2 receives useful detectable signal, and infrared receiving tube VD1 receives the external interference signal.The anode of infrared receiving tube VD1 and VD2 links to each other with the anode of operational amplifier A 1 and A2 respectively, and is connected with ground; The negative terminal of VD1 and VD2 links to each other with the negative terminal of two operational amplifiers respectively, the negative terminal of VD1 links to each other with capacitor C 1 by parallel resistor R2 with the output of operational amplifier A 1, and the negative terminal of VD2 links to each other with capacitor C 1 ' by parallel resistor R2 ' with the output of operational amplifier A 2.But operational amplifier A 1, A2 adopt the operational amplifier of the single power supply of FET input, and concrete model can be CA3140 and interchangeable integrated operational amplifier.The desirable 2M Ω of the representative value of resistance R 2 and R2 ', the desirable 0.1 μ F of the representative value of capacitor C 1 and C1 '.The output of A1 links to each other with the negative terminal of operational amplifier A 3 by R3, the output of A2 is passed through R3 ' and is linked to each other with the anode of operational amplifier A 3, the negative terminal of A3 links to each other by resistance R _ f with output terminal, the anode of A3 passes through resistance R _ f with ground ' link to each other, constitute difference and amplify, to eliminate of the influence of external interference light detectable signal.But operational amplifier A 3 adopts the operational amplifier of single power supply, and concrete model can be LM324 and interchangeable integrated operational amplifier.
3, the realization of comparator circuit
Among Fig. 6, be input to the anode of voltage comparator A4 through the signal after the infrared radiation receiving circuit amplification; Adjustable resistance R4 one end is connected with+5V, and the other end links to each other with ground, and its adjustable end is connected with the negative terminal of voltage comparator, and the magnitude of voltage of its adjustable end is the threshold value that starts demister, and this threshold value is determined by actual conditions.The output of voltage comparator A4 links to each other with a pull-up resistor R5.The representative value of pull-up resistor R5 can be 1K Ω, the desirable 10K Ω of the representative value of adjustable resistance R4.But voltage comparator A4 selects the LM339 of single power supply for use.When the output signal of infrared receiving circuit during less than threshold value, output signal is a logical zero; When the output signal of infrared receiving circuit during greater than threshold value, output signal is a logical one.
The output of comparator circuit is used to control the demister driving circuit.The demister driving circuit can be common relay or photoelectrical coupler.When selecting for use reflection to realize principle, drive demister during comparator circuit output " 0 " and carry out demist, comparator circuit stops demist when exporting " 1 " or expression does not have mist vapour; And when selecting for use diffuse reflection to realize principle, driving demister during comparator circuit output " 1 " carries out demist, stops demist during comparator circuit output " 0 " or expression does not have mist vapour.
Claims (2)
1, a kind of automobile intelligent demist controller, it is characterized in that: controller comprises signal projector, the useful signal receiver, the undesired signal receiver, amplifying circuit, comparator circuit and demister driving circuit, the useful signal receiver sends follow-up amplifying circuit to after conversion of signals is become electric signal, compare by undesired signal with the undesired signal receiver, after eliminating undesired signal, the useful electric signal that amplifies inserts comparator circuit again and threshold value compares, judge whether to start or close demister, the output signal of comparator circuit inserts the demister driving circuit, and demister is sent the ON/OFF control signal.
2, automobile intelligent demist controller according to claim 1, it is characterized in that: described useful signal receiver is installed on the reflected path of detectable signal and the incoming position of sensing signal on vehicle glass receives reflected signal, or the reflected path that is installed in detectable signal is neighbouring and the incoming position of sensing signal on vehicle glass receives diffuse signal, and useful detectable signal shows as reflection of glass surface signal or diffuse signal; Described undesired signal receiver is installed near the reflection paths of detectable signal and keeps certain included angle to receive undesired signal with the direction of the incoming position of detectable signal on vehicle glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520009921 CN2869955Y (en) | 2005-09-08 | 2005-09-08 | Automobile intelligent defrosting controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520009921 CN2869955Y (en) | 2005-09-08 | 2005-09-08 | Automobile intelligent defrosting controller |
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| Publication Number | Publication Date |
|---|---|
| CN2869955Y true CN2869955Y (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520009921 Expired - Fee Related CN2869955Y (en) | 2005-09-08 | 2005-09-08 | Automobile intelligent defrosting controller |
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| Country | Link |
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| CN (1) | CN2869955Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482743B (en) * | 2008-01-09 | 2011-05-25 | 财团法人工业技术研究院 | Demisting control system and method |
| TWI392839B (en) * | 2009-12-11 | 2013-04-11 | Ind Tech Res Inst | Power-saving defog controller with temperature compensation adjustment control |
-
2005
- 2005-09-08 CN CN 200520009921 patent/CN2869955Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482743B (en) * | 2008-01-09 | 2011-05-25 | 财团法人工业技术研究院 | Demisting control system and method |
| TWI392839B (en) * | 2009-12-11 | 2013-04-11 | Ind Tech Res Inst | Power-saving defog controller with temperature compensation adjustment control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING RUIYANG TECHNOLOGY DEVELOPMENT CO., LTD Free format text: FORMER OWNER: ZAN XINWU; PATENTEE Effective date: 20070810 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070810 Address after: 400023 No. 286 laterite land, Jiangbei District, Chongqing Patentee after: Chongqing Ruiyang Technology Development Co.Ltd Address before: 400044 School of opto electronic engineering, Chongqing University, Shapingba District, Chongqing Co-patentee before: Fu Yumei Patentee before: Zan Cuanwu |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070214 Termination date: 20130908 |