CN2800691Y - Non-contact indoor lamp switch - Google Patents
Non-contact indoor lamp switch Download PDFInfo
- Publication number
- CN2800691Y CN2800691Y CNU200520028714XU CN200520028714U CN2800691Y CN 2800691 Y CN2800691 Y CN 2800691Y CN U200520028714X U CNU200520028714X U CN U200520028714XU CN 200520028714 U CN200520028714 U CN 200520028714U CN 2800691 Y CN2800691 Y CN 2800691Y
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- circuit
- infrared
- switch
- received signal
- utility
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Abstract
The utility model discloses a non-contact indoor lamp switch belonging to a switch circuit of lamps which are used on automobiles. The utility model comprises a switch circuit 4 for the indoor lamps of automobiles, a power circuit 6, an infrared emitting circuit 1 and an infrared receiving and sensing circuit 2, wherein an outside illumination detection circuit 5 is connected with the infrared emitting circuit 1, the infrared receiving and sensing circuit 2 is used for receiving signals which are sent by the infrared emitting circuit 1, the infrared receiving and sensing circuit 2 is connected with a discriminating circuit 3 for infrared received signals, the discriminating circuit 3 for infrared received signals is connected with the switch circuit 4 for the indoor lamps of automobiles and the outside illumination detection circuit 5 is also connected with the discriminating circuit 3 for infrared received signals. The utility model has the advantages that the structure is novel, the problem that attention is distracted when drivers turn on and turn off lamps during driving is effectively avoided by the adoption of the non-contact indoor lamp switch mode, the driving safety is ensured and traffic accidents are prevented from happening.
Description
Technical field
The utility model relates to the switching circuit of light fixture on a kind of automobile.Be meant specifically and adopt non-contact method to open and close a kind of lamp switch of automobile room lamp.
Background technology
The driver's cabin inner top of automobile generally all has one or more light fixtures that are used to throw light on, and we are called automobile room lamp.The mode of operation of such light fixture that provides in the market only is two kinds of hand switch formula and light touch switch types.When the driver was in night running, if think to open by oneself indoor lamp, step was to grope to look for switch usually, and then turns on light; When turning off the light, also take same step.At this moment, the attentiveness that can cause the driver is not to concentrate on fully in the driving, and is serious even can cause traffic accident thus.
Summary of the invention
The utility model provides a kind of contactless indoor lamp switch, the drive problem of attentiveness of driver that influences that exists when solving the indoor lamp on-off mode of present employing contact.The technical scheme that the utility model is taked is: comprise automobile room lamp switching circuit 4, with the power circuit 6 that is each circuit supply, it is characterized in that: also comprise infrared emission circuit 1 and infrared reception sensing circuit 2, ambient light luminance detection circuit 5 is connected with this infrared emission circuit 1, infrared reception sensing circuit 2 is used to receive the signal of infrared emission circuit 1 emission, infrared reception sensing circuit 2 is connected with the judging circuit 3 of infrared received signal, the effect of the judging circuit 3 of this infrared received signal is by the infrared signal that receives is carried out logic decision, draw turning on light and closing modulating signal of automobile room lamp, the judging circuit 3 of this infrared received signal is connected with automobile room lamp switching circuit 4, and ambient light luminance detection circuit 5 also is connected with the judging circuit 3 of this infrared received signal.
During use infrared transmitting tube in infrared emission circuit, the infrared receiving circuit or infrared receiving tube are installed in the car, the infrared emission circuit is intermittent transmission infrared modulated light invisible to the human eye initiatively, and it is that irradiation is less than on the inspection optical sensor in the circuit that this Shu Guangzheng is everlasting when accessible.Not that is to say and can be detected by circuit, when staff or other objects when a certain spatial dimension stops the emission light path, partial reflection light just can reflex to the inspection optical sensor in the infrared reception sensing circuit, the signal that detects is by the judgement of the judging circuit of infrared received signal, can be used as the Reciprocative switch signal of automobile room lamp, thereby realize contactless ground switch lamp.Ambient light luminance detection circuit function is when ambient light is enough bright, will suppresses the work of infrared light radiating circuit and forbid indoor lamp work.
The utility model utilizes infrared ray to meet the principle of object reflection by infrared emission circuit, infrared reception sensing circuit, whether has object by detecting a certain particular space, exist if any object, as driver's hand, just carry out and turn on light or turn off the light, realized contactless indoor lamp switch.
Advantage of the present utility model is: novel structure, and adopt the indoor lamp on-off mode of non-contact type to avoid the driver effectively when driving, make the problem of dispersion attention during switch lamp owing to the searching lamp switch.Guarantee safe driving, prevented the generation of traffic accident.
Description of drawings
Fig. 1, the utility model circuit block diagram;
The circuit theory diagrams of Fig. 2, the utility model embodiment,
Microprocessor U1 executive program flow chart in Fig. 3, the utility model embodiment circuit.
Embodiment
Comprise automobile room lamp switching circuit 4, with the power circuit 6 that is each circuit supply, it is characterized in that: also comprise infrared emission circuit 1 and infrared reception sensing circuit 2, ambient light luminance detection circuit 5 is connected with this infrared emission circuit 1, infrared reception sensing circuit 2 is used to receive the signal of infrared emission circuit 1 emission, infrared reception sensing circuit 2 is connected with the judging circuit 3 of infrared received signal, the effect of the judging circuit 3 of this infrared received signal is by the infrared signal that receives is carried out logic decision, draw turning on light and closing modulating signal of automobile room lamp, the judging circuit 3 of this infrared received signal is connected with automobile room lamp switching circuit 4, and ambient light luminance detection circuit 5 also is connected with the judging circuit 3 of this infrared received signal.
The following describes the detailed operation principle of circuit each several part:
Infrared emission circuit 1 is responsible for the emission infrared modulated light, and the centre frequency of modulation is 38KHz, and the emission working forms is a batch (-type), and the resting period is adopted 100ms.The purpose of doing like this is to reduce the interference of ambient light, improves functional reliability, can also reduce energy resource consumption simultaneously.Infrared reception sensing circuit 2 parts contain infrared inspection optical sensor, and the 38KHz modulating wave amplifies demodulator circuit, and it will shine, and faint reflection modulation light amplification is demodulated to square wave on the inspection optical sensor, and offers subordinate's circuit.The judegment part of infrared received signal divides the working condition according to the infrared emission circuit part, contrasts the square-wave signal that infrared reception sensing circuit partly detects, and judges in the light path whether have object; Block object if exist, will judge whether shelter is to enter the detection spatiality, still leaves the detection spatiality, according to the open and-shut mode of indoor lamp, sends the order that opens or closes indoor lamp to the automobile room lamp switching circuit again.Like this, can strengthen the accuracy of circuit judges widely, reduce the possibility of false triggering.The automobile room lamp switching circuit portion adopts the pulse-width modulation PWM control mode, and the power controlling pipe is switched on or switched off bulb circuit.Ambient light luminance detection part when ambient light is enough bright, will suppresses the work of infrared light radiating circuit and forbid indoor lamp work.
According to the utility model theory diagram, provide concrete circuit theory diagrams to further specify the utility model.Referring to Fig. 2.
D1 is the circuit protection diode, prevents that the circuit that causes because of the power supply reversal connection from damaging.U3 is the 5V integrated regulator, and it is responsible for providing the working power of microprocessor U1.D2 is the infraluminescence pipe, drive by triode TR1, its base stage is controlled by 2 pin of microprocessor U1, this pin is when illumination is dark, the modulating pulse at intermittence of output 38KHz, the resting period generally is set in 0.1s, and the 38KHz burst width is 20ms, this has not only increased detecting reliability, has also reduced certain energy resource consumption simultaneously.U2 is infrared receiving integrate circuit, and its output is connected to 4 pin of microprocessor U1; After U2 detects infrared modulated light, detected profiled pulses is outputed to microprocessor, the microprocessor internal program will be according to state determine switch indoor lamp at that time, referring to Fig. 3; R1, C4 have constituted the decoupling circuit of U2 power supply.R3, R4, C6 have formed simple light measuring circuit, and wherein, microprocessor 6 pin provide the reference power source of light measuring circuit, and microprocessor 7 pin are light intensity modulus measuring junction, and R3 is the photometry light resistance, and its resistance changes with illuminance.Microprocessor 5 pin are defined as the pulse-width modulation PWM output, and the pulse of output converts direct voltage to through the filter circuit that R5, R6, C7, C8 form, and the conducting of control compound transistor TR2, TR3, finally control the bright dark of bulb.
3 pin of microprocessor are the test pin, and it is provided with use for factory testing, provides by this pin such as the isoparametric setting of calibration, running time of illuminance.
Claims (1)
1, a kind of contactless indoor lamp switch, comprise automobile room lamp switching circuit (4), with the power circuit (6) that is each circuit supply, it is characterized in that: also comprise infrared emission circuit (1) and infrared reception sensing circuit (2), ambient light luminance detection circuit (5) is connected with this infrared emission circuit (1), infrared reception sensing circuit (2) is used to receive the signal of infrared emission circuit (1) emission, infrared reception sensing circuit (2) is connected with the judging circuit (3) of infrared received signal, the effect of the judging circuit of this infrared received signal (3) is by the infrared signal that receives is carried out logic decision, draw turning on light and closing modulating signal of automobile room lamp, the judging circuit of this infrared received signal (3) is connected with automobile room lamp switching circuit (4), and ambient light luminance detection circuit (5) also is connected with the judging circuit (3) of this infrared received signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520028714XU CN2800691Y (en) | 2005-06-01 | 2005-06-01 | Non-contact indoor lamp switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520028714XU CN2800691Y (en) | 2005-06-01 | 2005-06-01 | Non-contact indoor lamp switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2800691Y true CN2800691Y (en) | 2006-07-26 |
Family
ID=36843172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520028714XU Expired - Lifetime CN2800691Y (en) | 2005-06-01 | 2005-06-01 | Non-contact indoor lamp switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2800691Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438368A (en) * | 2011-11-01 | 2012-05-02 | 奇瑞汽车股份有限公司 | Automobile indoor illumination system and automobile |
| TWI513364B (en) * | 2012-01-06 | 2015-12-11 | Eminent Electronic Technology Corp Ltd | Sesnor-controlled system and method for electronic apparatus |
-
2005
- 2005-06-01 CN CNU200520028714XU patent/CN2800691Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438368A (en) * | 2011-11-01 | 2012-05-02 | 奇瑞汽车股份有限公司 | Automobile indoor illumination system and automobile |
| TWI513364B (en) * | 2012-01-06 | 2015-12-11 | Eminent Electronic Technology Corp Ltd | Sesnor-controlled system and method for electronic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150601 Granted publication date: 20060726 |