CN101203082A - Intelligent table lamp - Google Patents

Abstract

The invention relates to a desk lamp, in particular to an intelligent desk lamp which utilizes the moving signal of people and light signal as the switch. The intelligent desk lamp comprises a microwave inductor, a photosensitive inductor, a light intensity comparator and a CB555 control unit. The moving signal of the microwave inductor is transmitted to an input end of the CB555 control unit; the light signal of the photosensitive inductor is compared by the light intensity comparator and then transmitted to the other input end of the CB555 control unit. The input end of the CB555 control unit is connected with the desk lamp. The invention has the advantages of simple circuit and safety and reliability, which can not only bring convenience and fun to the life of people but also save electric energy.

Description

Intelligent desk lamp

Technical field

The present invention relates to a kind of desk lamp, particularly a kind of people's of utilization movable signal and light signal come the intelligent desk lamp of place of switches.

Technical background

Along with the continuous progress of present society science and technology, people are also more and more higher to intelligentized requirement in the life, and people also require product to do more and more exquisitelyr when requiring quality of life, offer convenience and entertaining for the trickle aspect in the life.Yet desk lamp all is provided with switch usually, when people need open, generally is in the dark, comes into desk lamp, opens desk lamp switch gropingly, like this, obviously makes troubles to people, uses desk lamp to bring unsafe factor especially for some old men and child.

Summary of the invention

Defective in view of above-mentioned prior art exists the invention provides a kind of people's of utilization movable signal and the intelligent desk lamp that light signal comes place of switches.Intelligent desk lamp is exactly to have increased automatic induction system and control section on the basis of desk lamp in the past, people is not be used in walk close to desk lamp in the dark room, comes switch control with hand, and it is safer to allow child and old man use, not only convenient but also power saving.

This desk lamp by day or light enough strong the time (is standard with the suitable light intensity of reading), whether no matter the people arranged near desk lamp, desk lamp can not light automatically, when evening or light hint (being lower than etalon optical power), as the close desk lamp of people, its just automatic energized is luminous, and control luminous intensity by ambient light, after the people left, desk lamp meeting auto power off was realized automatic switch.

The present invention is that the technical scheme of being taked that achieves the above object is: a kind of intelligent desk lamp, it is characterized in that, comprise microwave sensor, light-inductive device, light intensity comparator and CB555 control unit, the movable signal of described microwave sensor is transferred to an input of CB555 control unit, the light signal of light-inductive device carries out another input that signal is transferred to the CB555 unit after relatively by the light intensity comparator, and the output of CB555 control unit connects desk lamp.

In technique scheme, the effect of light-inductive device is exactly the size that the power of the light signal that will feel is converted into resistance value, and compares with standard of luminous intensity value, comparison value is passed on informed controlling parts, comes the control switch state and regulates light intensity; The effect of microwave sensor is to have nobody close in feeling closely, and informs control unit in real time, control desk lamp switch state; The control unit effect is the signal that transmits according to light-inductive device and microwave sensor, promptly the light intensity around the desk lamp and have nobody near the light on and off of controlling lamp its.

The beneficial effect that the present invention produces is: the intelligent desk lamp circuit is simple, safe and reliable, brings convenience and enjoyment to people's life, and the while is saves energy again.

Description of drawings

Fig. 1 is a catenation principle block diagram of the present invention and as Figure of abstract.

Fig. 2 is an electrical schematic diagram of the present invention.

Embodiment

With reference to accompanying drawing, the CB555 control unit is by the CB555 chip and add the multivibrator that a spot of Resistor-Capacitor Unit is formed.If the initial voltage U of electric capacity _c=0, energized during t=0 is owing to capacitance voltage can not suddenly change, so high and low trigger end $V_{\mathrm{TH}}=V_{\mathrm{TL}}=0<\frac{1}{3}{V}_{\mathrm{cc}},$ Comparator A ₁Be output as high level, A ₂Be output as low level, i.e. R _D=1, S _D=0 (1 expression high potential, 0 expression electronegative potential), the R-S trigger puts 1, timer output u ₀=1 this moment Q=0, timer internal discharge triode ends, power supply V _CcThrough R ₁, R ₂To capacitor C charging, u _cRaise gradually.Work as u _cRise to

The time, A ₂Output is 1 by 0 upset, at this moment R _D=S _D=1, R-S triggers along hold mode constant.So 0＜t＜t ₁During this time, timer output u ₀Be high level 1.

T=t ₁Constantly, u _cRise to

Comparator A ₁Output become 0 by 1, R at this moment _D=0, S _D=1, the R-S trigger answers 0, timer output u ₀=0.

t ₁＜t＜t ₂During this time, Q=1, discharge triode T conducting, capacitor C is passed through R ₂Discharge.u _cPress index law and descend, when $u_c<\frac{2}{3}{V}_{\mathrm{cc}}$ The time comparator A ₁Output becomes 1 by 0, the R of R-S trigger _D=S _D=1, the state of Q is constant, u ₀State still be low level.

T=t ₂Constantly, u _cDrop to

Comparator A ₂Output becomes 0 by 1, the R of R---S trigger _D=1, S _D=0, trigger is in 1, timer output u ₀=1.This moment, power supply to the capacitor C discharge, repeated said process once more.

Utilize CB555 to form multivibrator in the present invention and make desk lamp sometimes bright sometimes dark, meet a triode T2 at 2 ends (low level trigger end) of 555 chips, with the operating state of locking desk lamp in order to prevent light from small variation taking place within the specific limits.

Microwave sensor is TS982.It utilizes microwave technology, in a slight space, set up electric microfield, will reflection echo when the people enters electric field, detection through electronic circuit, measure faint frequency-shift signaling, sort signal just can be exported control signal through intelligent the processing again, as the input signal of 555 multivibrators.

The light-inductive device is a photo resistance, the intensity of photo resistance sensing light, to be resistance value change with the variation of the power of light for it, resistance diminished when light was strong, its magnitude of voltage also diminishes, light if the time its resistance become big, it is big that magnitude of voltage also becomes, the ambient light line strength is converted into magnitude of voltage, light intensity magnitude of voltage when reading with standard again compares, if environmental light intensity magnitude of voltage overgauge voltage, environmental light intensity then is described if, produce control signal, input to control circuit, on the contrary the environmental light intensity magnitude of voltage less than normal voltage, illustrate environmental light intensity bright when standard is read light intensity, so then do not produce control signal, even microwave sensor has the people also can not make desk lamp shinny around sensing.

Describe operation principle of the present invention with reference to the accompanying drawings in detail: when light strong inadequately, and when having the people close, frequency-shift signaling when microwave sensor detects people's activity, the control circuit of inductor will be exported a low level, this low level has been added in the base stage of triode T1, triode T1 by, thereby make the collector electrode of triode T1 be in high level, just start working by the multivibrator that 555 chips constitute.Since light a little less than, the resistance of photo resistance is bigger, this moment, the voltage of dividing point of photo resistance GM and resistance R 4 was lower than 1/3Vcc, the output of CB555 control unit is exported high level, makes controllable silicon 97A6 conducting, desk lamp is lighted.Simultaneously this high level has been added in the base stage of triode T2 by resistance R 5, makes triode T2 conducting, and the collector electrode of triode T2 then is in low level, thereby locks this kind operating state.

When the people leaves the desk lamp certain distance, the output of microwave sensor will be exported high level, and triode T1 is through resistance R 2 biasing conductings, and the collector electrode of triode T1 just is in low level, and 555 multivibrators are not worked, so even the light concealed light can be not bright yet.When light was more intense, the resistance of photo resistance was just smaller, and the voltage of the branch piezoelectricity of photo resistance GM and resistance R 1 is higher than 1/3Vcc, the output output low level of CB555 control unit, and then controllable silicon ends, at this moment, even the people is arranged near also can be not bright.

Claims (1)

1. intelligent desk lamp, it is characterized in that, comprise microwave sensor, light-inductive device, light intensity comparator and CB555 control unit, the movable signal of described microwave sensor is transferred to an input of CB555 control unit, the light signal of light-inductive device carries out another input that signal is transferred to the CB555 unit after relatively by the light intensity comparator, and the output of CB555 control unit connects desk lamp.

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