CN203761629U - Time-delay variable human body-induction LED drive circuit - Google Patents
Time-delay variable human body-induction LED drive circuit Download PDFInfo
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- CN203761629U CN203761629U CN201320871236.3U CN201320871236U CN203761629U CN 203761629 U CN203761629 U CN 203761629U CN 201320871236 U CN201320871236 U CN 201320871236U CN 203761629 U CN203761629 U CN 203761629U
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- time delay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
A time-delay variable human body-induction LED drive circuit comprises a rectification input stage, a load LED tube, a current adjusting chip, and an induction drive circuit, wherein the current adjusting chip is used for adjusting the load LED tube, and the induction drive circuit is used for controlling the current adjusting chip. The induction drive circuit is composed of a pulse delay circuit, a human body delay detection circuit and a human body movement induction circuit. An output end of the pulse delay circuit is connected with a control end of the current adjusting chip. A reset end and a timing input end of the pulse delay circuit are connected with a signal output end of the human body delay detection circuit and a signal output end of the human body movement induction circuit respectively. The beneficial effects of the time-delay variable human body-induction LED drive circuit are that a function of a human body induction control circuit is achieved, optimized treatment is carried out, a lamp is effectively prevented from dimming when a person exists, and illumination control is enabled to be smart.
Description
Technical field
The utility model belongs to electronic applications, relates to a kind of LED drive circuit, particularly the variable human body sensing LED drive circuit of a kind of time delay.
Background technology
At present the LED light fixture of Based Intelligent Control is more and more, and control method is as: acoustic control, light-operated, human body sensing and some bus control types.These intelligent control LED light fixtures are widely used need to provide the place of real-time illumination with corridor, corridor, parking lot etc.Because these places all have an identical feature: in nobody, only need to provide faint illumination, enough illumination will be provided while having people.Could perfectly reach lighting requirement so only there is the LED light fixture of Based Intelligent Control, and further realize energy-conservation.But due to acoustic control, the light-operated phenomenon that all may have misoperation, bus mastering mode is because cost is higher, and wiring is complicated, and human body sensing only can be responded to human body, does not have misoperation, so human body sensing LED light fixture occupation rate of market relatively can be much larger.
And human body sensing light fixture triggering mode mainly contains two kinds on the market: continuous trigger and discontinuous triggering, their defect of all existence, ought have people exactly near lamp, and in the situation that long-time nothing is significantly moved, lantern festival is automatically dimmed, and impact is normally used.
Utility model content
Long-time without significantly action people for overcoming existing human body sensing light fixture, as light fixture erroneous judgement people leaves while bending over one's desk working or sit quietly rest, turns down the technological deficiency of lamp brightness, the utility model discloses the variable human body sensing LED drive circuit of a kind of time delay.
The variable human body sensing LED drive circuit of time delay described in the utility model, comprises rectification input stage and load LED pipe, also comprises for the electric current of regulating load LED pipe and regulates chip; Also comprise the induction drive circuit that regulates chip for controlling electric current, described induction drive circuit is made up of pulse delay circuit, human body time delay testing circuit and human motion sensor circuit, described pulse delay circuit output regulates chip controls end to be connected with electric current, and the reset terminal of described pulse delay circuit is connected with the signal output part of human body time delay testing circuit and human motion sensor circuit respectively with timing input; Whether described human motion sensor circuit there is human motion at detection range internal induction, and whether described human body time delay testing circuit exists human body at detection range internal induction.
Preferably, described human motion sensor circuit is pyroelectric sensor.
Further, described human motion sensor circuit also comprises the RC filter being connected with pyroelectric sensor, a described RC filter by be connected in parallel on and pyroelectric sensor output between the first filter capacitor and the first filter resistance form.
Preferably, described human body time delay testing circuit is made up of with the 2nd RC filter that is connected microwave transceiver output microwave transceiver.
Further, described the 2nd RC filter comprises the second filter resistance and the second filter capacitor that are connected to microwave transceiver signal output part, described the second filter resistance other end ground connection, the second filter capacitor other end connects the signal input part of pulse delay circuit, described the 2nd RC filter also comprises DC bias circuit, described DC bias circuit by be connected to pulse delay circuit signal input part and power supply, between the first divider resistance and the second divider resistance form.
Concrete, described pulse delay circuit is made up of timer and clock generator, the input end of clock of the output connection timer of described clock generator, the reset terminal of described timer is connected with the signal output part of human body time delay testing circuit and human motion sensor circuit respectively with timing input.
Preferably, described rectification input stage is made up of with the DC decompression chip being connected with full bridge rectifier output full bridge rectifier.
Further, described DC decompression chip is 78L05.
Further, described rectification input stage also comprises protective circuit, described protective circuit be connected on the fuse resistor on live wire by connection and be connected to live wire and zero line between piezo-resistance form.
Concrete, it is ADP8866 that described electric current regulates chip.
The beneficial effects of the utility model are: can realize the function of existing human body induction control circuit, and carry out optimization process, make this new-type circuit can effectively avoid occurring the situation that lamp is dimmed in people's situation, illumination be controlled more intelligent.
Brief description of the drawings
Fig. 1 is a kind of embodiment schematic diagram of the variable human body sensing LED drive circuit of time delay described in the utility model;
In figure, Reference numeral name is called: L-live wire N-zero line RF-fuse resistor RV-piezo-resistance U1-DC decompression chip U2-electric current regulates chip U3-pyroelectric sensor U4-full-bridge rectification unit U5-microwave transceiver U6-pulse delay circuit VCC-constant DC voltage C1-first filter capacitor C2-second filter capacitor C3-the 3rd filter capacitor R1-first filter resistance R2-second filter resistance R3-first R4-of divider resistance unit the second divider resistance DS-load LED pipe.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Embodiment 1
The variable human body sensing LED drive circuit of time delay described in the utility model, comprises rectification input stage and load LED pipe, also comprises for the electric current of regulating load LED pipe and regulates chip U2; Also comprise the induction drive circuit that regulates chip for controlling electric current, described induction drive circuit is made up of pulse delay circuit, human body time delay testing circuit and human motion sensor circuit, described pulse delay circuit output regulates chip controls end to be connected with electric current, and the reset terminal of described pulse delay circuit is connected with the signal output part of human body time delay testing circuit and human motion sensor circuit respectively with timing input; Whether described human motion sensor circuit there is human motion at detection range internal induction, and whether described human body time delay testing circuit exists human body at detection range internal induction.
Rectification input stage utilizes prior art that electric main is converted into the invariable direct voltage of magnitude of voltage for subsequent conditioning circuit, human motion sensing unit is for detection of in load LED pipe DS illumination zone, whether someone occurs, human motion sensing unit can adopt shock sensor, infrared sensor, temperature sensor or their combination etc., human motion sensing unit outputs to electric current by the signal detecting and regulates chip, electric current regulates chip according to the electric current of the voltage signal regulating load LED pipe of human body sensing unit output, in prior art, existing many moneys LED able to programme drives chip, for example XRP7613, ADP8860 etc., automatically adjust LED size of current according to the digital signal low and high level of input, brightness and flicker frequency etc.
In the present embodiment, human motion sensing unit is pyroelectric sensor, and the operation principle of pyroelectric sensor is that piezoelectric ceramic class dielectric can keep polarized state after electric polarization, is called spontaneous polarization.Spontaneous polarization raises and reduces with temperature, reduces to zero at Curie-point temperature.Therefore, when this material be subject to infrared radiation and temperature raise time, surface charge will reduce, and be equivalent to discharge a part of electric charge, therefore be called pyroelectricity.The electric charge of release be can be exchanged into Voltage-output through amplifier.
For example, in the time that pyroelectric sensor detects without physical activity, export a low level signal to pulse delay circuit, this signal is transferred to Current Control chip by pulse delay circuit, a lower constant current of Current Control chip output, load LED pipe DS works with low-power consumption, low-light level mode.In the time that pyroelectric sensor has detected physical activity, output high level signal is to pulse delay circuit, and this signal is transferred to Current Control chip by pulse delay circuit, and Current Control chip is heightened output current value, and load LED pipe DS works in large brightness mode.
The operation principle of human motion sensing unit has been described as an example of pyroelectric sensor example above, whether described human body time delay testing circuit continues to be positioned at surveyed area for detection of human body, can be imageing sensor, gravity sensor etc., in the present embodiment, adopt human body time delay testing circuit to be formed with the 2nd RC filter that is connected microwave transceiver output by microwave transceiver.Microwave transceiver U5 passes through constantly to extraneous launched microwave signal, and accept the microwave signal returned, but someone time, it is variant when the microwave signal of returning can be with nobody, now microwave transceiver U5 exports a Doppler signal, but because this signal cannot be gathered by back-end circuit, thus need to there is RC filter circuit to carry out frequency reducing, so that subsequent conditioning circuit can be identified this signal.
The 2nd RC filter described in the present embodiment comprises the second filter resistance and the second filter capacitor C2 that are connected to microwave transceiver signal output part, described the second filter resistance R2 other end ground connection, the second filter capacitor other end connects the signal input part of pulse delay circuit, described the 2nd RC filter also comprises DC bias circuit, described DC bias circuit by be connected to pulse delay circuit signal input part and power supply, between the first divider resistance R3 and the second divider resistance R4 form.The second filter capacitor and the second filter resistance form a low pass filter, and by high-frequency signal filtering, the first divider resistance and the second divider resistance provide DC offset voltage for AC signal, stablize threshold voltage in AC signal, avoid situation about can not identify to occur.
The function that described pulse delay circuit U6 realizes is to utilize the output signal of human body time delay testing circuit to carry out time delay variation to output signal, in the time that human motion sensing unit output signal changes, pulse delay circuit carries out timing to the output signal after changing, when timing finishes, as long as the output signal of human body time delay testing circuit indicates that people exists, the output signal logic state of pulse delay circuit U6 is constant, LED brightness also can not change, if detect when timing finishes and there is no human body in detection range, change logic state, reduce LED electric current.For example in the present embodiment, when microwave transceiver detected people time, output signal is carried out zero clearing to pulse delay circuit to its timing, time delay will add up automatically, after people is not in light fixture induction range, pulse delay circuit output signal, to Current Control chip, is turned down LED electric current, thereby avoid occurring that people goes out at lamp, or people not and the bright problem of lamp.
In the present embodiment, pulse delay circuit is made up of timer and clock generator, the input end of clock of the output connection timer of described clock generator, the reset terminal of described timer is connected with the signal output part of human body time delay testing circuit and human motion sensor circuit respectively with timing input.
Embodiment 2
The present embodiment further improves on the basis of embodiment 1, the signal output part of pyroelectric sensor is also connected with RC filter, described RC filter is made up of the filter capacitor C1 and the filter resistance R1 that are connected to ground, this low-pass filter circuit becomes the output voltage signal of pyroelectric sensor U3 to approach DC state, so that back-end circuit can correctly be identified the logical meaning of this signal.
Embodiment 3
In the present embodiment, rectification input stage is provided to a kind of embodiment, described rectification input stage is made up of with the DC decompression chip U1 being connected with full bridge rectifier output full bridge rectifier U4, full bridge rectifier is converted into electric main the direct voltage of half-sine wave, recycling DC decompression chip is translated into the constant DC voltage VCC that voltage is lower, with respect to Half bridge rectifier, full-bridge rectification mode efficiency is higher, for improving ac input end fail safe, can between the live wire of interchange input stage and zero line, be connected with piezo-resistance RV, on described live wire, be in series with fuse resistor RF, reduce the impact of surge voltage to internal components, fuse resistor fusing when large electric current, turn-off current path.In the present embodiment, DC decompression chip is 78L05.
Previously described is each preferred embodiment of the present utility model, preferred implementation in each preferred embodiment is if not obviously contradictory or taking a certain preferred implementation as prerequisite, each preferred implementation arbitrarily stack combinations is used, design parameter in described embodiment and embodiment is only the utility model proof procedure for clear statement utility model people, not in order to limit scope of patent protection of the present utility model, scope of patent protection of the present utility model is still as the criterion with its claims, the equivalent structure that every utilization specification of the present utility model and accompanying drawing content are done changes, in like manner all should be included in protection range of the present utility model.
Claims (10)
1. the variable human body sensing LED drive circuit of time delay, comprises rectification input stage and load LED pipe, also comprises for the electric current of regulating load LED pipe and regulates chip; It is characterized in that, also comprise the induction drive circuit that regulates chip for controlling electric current, described induction drive circuit is made up of pulse delay circuit, human body time delay testing circuit and human motion sensor circuit, described pulse delay circuit output regulates chip controls end to be connected with electric current, and the reset terminal of described pulse delay circuit is connected with the signal output part of human body time delay testing circuit and human motion sensor circuit respectively with timing input; Whether described human motion sensor circuit there is human motion at detection range internal induction, and whether described human body time delay testing circuit exists human body at detection range internal induction.
2. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 1, is characterized in that, described human motion sensor circuit is pyroelectric sensor.
3. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 2, it is characterized in that, described human motion sensor circuit also comprises the RC filter being connected with pyroelectric sensor, a described RC filter by be connected in parallel on and pyroelectric sensor output between the first filter capacitor and the first filter resistance form.
4. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 1, is characterized in that, described human body time delay testing circuit is made up of with the 2nd RC filter that is connected microwave transceiver output microwave transceiver.
5. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 4, it is characterized in that, described the 2nd RC filter comprises the second filter resistance and the second filter capacitor that are connected to microwave transceiver signal output part, described the second filter resistance other end ground connection, the second filter capacitor other end connects the signal input part of pulse delay circuit, described the 2nd RC filter also comprises DC bias circuit, described DC bias circuit by be connected to pulse delay circuit signal input part and power supply, between the first divider resistance and the second divider resistance form.
6. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 1, it is characterized in that, described pulse delay circuit is made up of timer and clock generator, the input end of clock of the output connection timer of described clock generator, the reset terminal of described timer is connected with the signal output part of human body time delay testing circuit and human motion sensor circuit respectively with timing input.
7. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 1, is characterized in that, described rectification input stage is made up of with the DC decompression chip being connected with full bridge rectifier output full bridge rectifier.
8. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 7, is characterized in that, described DC decompression chip is 78L05.
9. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 7; it is characterized in that; described rectification input stage also comprises protective circuit, described protective circuit be connected on the fuse resistor on live wire by connection and be connected to live wire and zero line between piezo-resistance form.
10. the variable human body sensing LED drive circuit of a kind of time delay as claimed in claim 1, is characterized in that, it is ADP8866 that described electric current regulates chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320871236.3U CN203761629U (en) | 2013-12-27 | 2013-12-27 | Time-delay variable human body-induction LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320871236.3U CN203761629U (en) | 2013-12-27 | 2013-12-27 | Time-delay variable human body-induction LED drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203761629U true CN203761629U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320871236.3U Expired - Fee Related CN203761629U (en) | 2013-12-27 | 2013-12-27 | Time-delay variable human body-induction LED drive circuit |
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| CN (1) | CN203761629U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105898846A (en) * | 2015-02-12 | 2016-08-24 | 摩托罗拉移动有限责任公司 | Adaptive filtering for presence detection |
| CN111002468A (en) * | 2019-12-12 | 2020-04-14 | 李素雅 | Electromagnetic fixing and anti-loosening cement mortar stirring device |
-
2013
- 2013-12-27 CN CN201320871236.3U patent/CN203761629U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105898846A (en) * | 2015-02-12 | 2016-08-24 | 摩托罗拉移动有限责任公司 | Adaptive filtering for presence detection |
| CN105898846B (en) * | 2015-02-12 | 2019-02-12 | 摩托罗拉移动有限责任公司 | For there is the adaptive-filtering of detection |
| CN111002468A (en) * | 2019-12-12 | 2020-04-14 | 李素雅 | Electromagnetic fixing and anti-loosening cement mortar stirring device |
| CN111002468B (en) * | 2019-12-12 | 2021-05-28 | 福建三明南方水泥有限公司 | Electromagnetic fixing and anti-loosening cement mortar stirring device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20171227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |