CN104192056B - The dynamic value of a kind of intelligent dimmer detects the method for headlight - Google Patents
The dynamic value of a kind of intelligent dimmer detects the method for headlight Download PDFInfo
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- CN104192056B CN104192056B CN201410481054.4A CN201410481054A CN104192056B CN 104192056 B CN104192056 B CN 104192056B CN 201410481054 A CN201410481054 A CN 201410481054A CN 104192056 B CN104192056 B CN 104192056B
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- intelligent dimmer
- resistance value
- automobile front
- resistance
- front lamp
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Abstract
The invention discloses the method that the dynamic value of a kind of intelligent dimmer detects headlight, comprising: under automobile front lamp normal condition, the resistance of intelligent dimmer to automobile front lamp two ends is measured, and is kept in the memory device of intelligent dimmer by the resistance value of measurement; Afterwards, every the time period of a setting, intelligent dimmer remeasures the resistance value at automobile front lamp two ends, the resistance value measured below and the resistance value measured above are compared, if the ratio between former and later two resistance values is more than or equal to setting value, intelligent dimmer then judges that automobile front lamp damages, and automatically quits work; If the ratio between former and later two resistance values is less than setting value, intelligent dimmer then judges that automobile front lamp is normal, and the resistance value measured below is replaced the resistance value measured above is kept in the memory device of intelligent dimmer.The inventive method can detect the quality of headlight effectively, accurately.
Description
Technical field
The invention belongs to Intelligent light changer for motor vehicle, be specifically related to the method that the dynamic value of a kind of intelligent dimmer detects headlight.
Background technology
Cars meeting at night was manual type realization in the past, and for avoiding country beam dazzling, meeting both sides chaufeur all must open lower beam illumination.But for a long time, always some chaufeur is not observed traffic rules and regulations, Kaiyuan City's light, not dimming during nighttime meeting, cause driver, because distance light is dazzle the eyes, traffic accident occurs.In order to distance light when solving vehicle meeting dazzles the eyes problem, occur that a kind of intelligent dimmer that utilizes forces meeting vehicle to become the technical solution of light at present, it is on all public vehicles, all install intelligent dimmer (disclosed in patent of invention ZL200910225709.03 automatic device for changing light) additional, two when being equipped with the cars meeting at night of intelligent dimmer, if wherein open dipped beam for one, the intelligent dimmer of this car will launch wireless varying optical signal, after the intelligent dimmer of the self-propelled vehicle of another Kaiyuan City's light receives this varying optical signal, will automatically control headlight and become lower beam illumination from distance light.But in actual applications, be there is damaged condition if find by change ray machine motor-car passing light, as a dipped beam or two dipped beams damage, after change light, due to luminance shortage, still can cause new potential safety hazard.This defect of existing intelligent dimmer should give solution.
Summary of the invention
The object of the invention is for prior art Problems existing, a kind of method that the dynamic value of the whether normal intelligent dimmer of automobile front lamp detects headlight that can correctly judge is provided.
Technical scheme of the present invention is achieved in that
The dynamic value of intelligent dimmer detects the method for headlight, and comprising: under automobile front lamp normal condition, the resistance of intelligent dimmer to automobile front lamp two ends is measured, and is kept in the memory device of intelligent dimmer by the resistance value of measurement; Afterwards, every the time period of a setting, intelligent dimmer remeasures the resistance value at automobile front lamp two ends, the resistance value measured below and the resistance value measured above are compared, if the ratio between former and later two resistance values is more than or equal to setting value, intelligent dimmer then judges that automobile front lamp damages, and automatically quits work, and does not namely launch wireless varying optical signal and does not perform change light; If the ratio between former and later two resistance values is less than setting value, intelligent dimmer then judges that automobile front lamp is normal, and the resistance value measured below is replaced the resistance value measured above is kept in the memory device of intelligent dimmer.
The time period of described setting is 10 minutes ~ 60 minutes.
Described setting value is for being greater than 1.5.
Beneficial effect of the present invention:
The inventive method is a kind of dynamically value control methods, is characterized in not fixing initial condition resistance value, new measuring resistance value and former resistance value is contrasted at regular intervals later, major cause is: resistance value and temperature correlation join, in general, temperature is higher, and resistance value is larger.If just resistance value under initial condition to be fixed the foundation as detecting contrast later, so, if install the resistance value under intelligent dimmer initial condition winter, to hot day, or some is local, and day and night temperature is just larger, at that rate, although headlight does not damage, because heal differential then likely makes the resistance value of twice measurement in front and back be more than or equal to 1.5, i.e. R
newly>=1.5R
old, intelligent dimmer then can think that headlight damages and enters dormant state, and this is obviously unreasonable.And if get the new resistance value (such as: detect 1 time for every 15 minutes) measured at set intervals, and replace the resistance value measured in without obvious increase situation above, and as the foundation of contrast next time, then the error concealment that temperature traverse may be able to be caused.Because at short notice, the natural environment residing for vehicle can not have too large temperature traverse, and like this, the mode of this dynamic value contrast just can detect effectively, accurately and intelligent dimmer be played a positive role the quality of headlight, guarantees traffic safety.
Technical scheme of the present invention is further illustrated below in conjunction with embodiment.
Accompanying drawing explanation
Fig. 1 is existing automatic device for changing light circuit diagram.
Detailed description of the invention
The dynamic value of intelligent dimmer detects the method for headlight, and comprising: under automobile front lamp normal condition, the resistance of intelligent dimmer to two automobile front lamp two ends is measured, and the resistance value R that will measure
oldbe kept in the memory device of intelligent dimmer; Afterwards, by programming control every 15 minutes (or 10 minutes or 30 minutes or 60 minutes), intelligent dimmer remeasures the resistance value R at two automobile front lamp two ends
newly, by the resistance value R measured below
newlywith the resistance value R measured above
oldcompare, if occur, the observed reading of new measured resistance value obviously than last is high, and the ratio namely between former and later two resistance values is more than or equal to setting value 1.5, i.e. R
newly>=1.5R
old, ratio also can be 1.4,1.6,1.7 etc., and intelligent dimmer then judges that automobile front lamp damages, and automatically quits work, and enters dormant state, does not namely launch wireless varying optical signal and does not perform change light; If the ratio between former and later two resistance values is less than setting value 1.5, i.e. R
newly< 1.5R
old, intelligent dimmer then judges that automobile front lamp is normal, and the resistance value R that will measure below
newlythe resistance value R that replacement is measured above
oldbe kept in the memory device of intelligent dimmer.
The physical circuit of described measurement of resistance can adopt prior art, such as, in patent of invention 200910225709.0, just provides a kind of mode detecting headlight resistance, and as shown in Figure 1, its testing circuit is connected to form by amplifier IC, electric capacity C and related resistors R.Under SCM program commander, this testing circuit amplifier output pin exports high level, can detect dipped beam, country beam resistance respectively, and preserved in memory by resistance data record through the built-in AD conversion of micro controller system.When detecting headlight, only data in new measuring resistance data and memory device need be compared, if find, new data of surveying obviously increase, as R
newly>=1.5R
old, system then thinks that headlight damages.
Claims (3)
1. the dynamic value of intelligent dimmer detects a method for headlight, and it is characterized in that comprising: under automobile front lamp normal condition, the resistance of intelligent dimmer to automobile front lamp two ends is measured, and is kept in the memory device of intelligent dimmer by the resistance value of measurement; Afterwards, every the time period of a setting, intelligent dimmer remeasures the resistance value at automobile front lamp two ends, the resistance value measured below and the resistance value measured above are compared, if the ratio between former and later two resistance values is more than or equal to setting value, intelligent dimmer then judges that automobile front lamp damages, and automatically quits work, and does not namely launch wireless varying optical signal and does not perform change light; If the ratio between former and later two resistance values is less than setting value, intelligent dimmer then judges that automobile front lamp is normal, and the resistance value measured below is replaced the resistance value measured above is kept in the memory device of intelligent dimmer.
2. the dynamic value of intelligent dimmer according to claim 1 detects the method for headlight, it is characterized in that the time period of described setting is 10 minutes ~ 60 minutes.
3. the dynamic value of intelligent dimmer according to claim 1 and 2 detects the method for headlight, it is characterized in that described setting value is for being greater than 1.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410481054.4A CN104192056B (en) | 2014-09-19 | 2014-09-19 | The dynamic value of a kind of intelligent dimmer detects the method for headlight |
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|---|---|---|---|
| CN201410481054.4A CN104192056B (en) | 2014-09-19 | 2014-09-19 | The dynamic value of a kind of intelligent dimmer detects the method for headlight |
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| CN104192056A CN104192056A (en) | 2014-12-10 |
| CN104192056B true CN104192056B (en) | 2016-01-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5666028A (en) * | 1994-04-06 | 1997-09-09 | Gentex Corporation | Automobile headlamp and running light control system |
| CN101092122A (en) * | 2006-06-22 | 2007-12-26 | 赵立 | Automatic device for changing light of front headlight of motor vehicle |
| CN201590926U (en) * | 2009-11-23 | 2010-09-22 | 赵立 | Auto-dimming device for headlamp of motor vehicle |
| CN201590925U (en) * | 2009-11-23 | 2010-09-22 | 赵立 | Auto-dimming device for headlamp of motor vehicle |
| CN102069751A (en) * | 2009-11-23 | 2011-05-25 | 赵立 | Automatic luminosity-changing device for headlights of automotive vehicle |
| EP2489548A1 (en) * | 2011-02-17 | 2012-08-22 | Valeo Vision | Method for controlling the switching of an adaptive headlight system of an automobile |
-
2014
- 2014-09-19 CN CN201410481054.4A patent/CN104192056B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5666028A (en) * | 1994-04-06 | 1997-09-09 | Gentex Corporation | Automobile headlamp and running light control system |
| CN101092122A (en) * | 2006-06-22 | 2007-12-26 | 赵立 | Automatic device for changing light of front headlight of motor vehicle |
| CN201590926U (en) * | 2009-11-23 | 2010-09-22 | 赵立 | Auto-dimming device for headlamp of motor vehicle |
| CN201590925U (en) * | 2009-11-23 | 2010-09-22 | 赵立 | Auto-dimming device for headlamp of motor vehicle |
| CN102069751A (en) * | 2009-11-23 | 2011-05-25 | 赵立 | Automatic luminosity-changing device for headlights of automotive vehicle |
| EP2489548A1 (en) * | 2011-02-17 | 2012-08-22 | Valeo Vision | Method for controlling the switching of an adaptive headlight system of an automobile |
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| CN104192056A (en) | 2014-12-10 |
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