CN2919774Y

CN2919774Y - Intelligent small lamp used at night

Info

Publication number: CN2919774Y
Application number: CNU200620017449XU
Authority: CN
Inventors: 张平
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-16
Filing date: 2006-06-16
Publication date: 2007-07-04
Anticipated expiration: 2016-06-16

Abstract

The utility model discloses a little intelligent night-light, which comprises a main control circuit, a human body pyroelectric infrared sensor, a light sensor, a power circuit and a luminous circuit. The human body pyroelectric infrared sensor, light sensor, power circuit and luminous circuit are respectively connected electrically to the main control circuit; the power circuit is connected with the main control circuit and luminous circuit respectively. The little night-light of the utility model adds with environment light sensor and the sensor to detect human body action, and therefore the utility will not turn on unless the environment light intensity is lower than the predetermined value and human body action is detected, thus preventing waste of energy resulted from illuminating when there is no human body action nor necessity of illumination, and greatly reducing the electric power demand; the night-light can be turned on and be turned off automatically, which provides convenience to users.

Description

The intelligence mini light night

[technical field]

The utility model relates to a kind of emergency lighting device that is used for.

[background technology]

In occasions such as families, under (intense light source) condition that mini light night is used to there is not main light source or the temporary emergency lighting under the situation that does not need main light source.At present, the intelligent degree of mini light night is not high, having plenty of needs hand switch fully, when using in the family, this kind mini light night is arranged on corridor, lavatory etc. and locates, in kinsfolk's illumination that is opened just before going to bed, even may not have personnel up and about in All Through The Night, do not need the illumination of mini light night, mini light night still can be worked and is closed until the next morning; Though general mini light night power is lower, roughly about 5W, the long-time use expended still not lowly, causes to waste energy.The mini light night that has has increased light control functionality, hour opens automatically in ambient lighting intensity, and closes when intensity of illumination is big, has just realized automatic switch, does not accomplish rationally to use mini light night, still can not solve above-mentioned energy waste problem.

[summary of the invention]

The purpose of this utility model is exactly in order to overcome above the deficiencies in the prior art part, and the intelligent mini light night of a kind of degree of intelligence height, saving electric energy, applying flexible is provided.

For achieving the above object, the utility model proposes a kind of intelligent mini light night, comprise that main control circuit, people's body heat release infrared sensor, optical sensor, power circuit, lighting circuit, described people's body heat is released infrared sensor, optical sensor, lighting circuit and is electrically connected with described main control circuit respectively; Described power circuit is electrically connected with described main control circuit, lighting circuit respectively.

Above-mentioned intelligent mini light night, described main control circuit comprises MCU, delay circuit, switching circuit, described delay circuit, switching circuit are electrically connected with described MCU respectively.Described switching circuit comprises switch triode (Q1), its base stage and the coupling of described MCU one output pin, and collector electrode is connected emitter grounding with described lighting circuit one end.

Described power circuit comprises AC-DC conversion step-down module, and input is used for the incoming transport civil power, and output is electrically connected with described main control circuit, lighting circuit.Or described power circuit comprises battery or battery pack.

Described lighting circuit comprises first light-emitting diode, second light-emitting diode in parallel.

Described delay circuit is the RC oscillator, can change the frequency of RC oscillator by the value that changes resistance, electric capacity, thereby changes delay time.

Resistance one end of described RC oscillator connects described power circuit, and the other end and electric capacity are connected to the signal input pin of described MCU altogether, described electric capacity other end ground connection.

Described AC-DC conversion reduction voltage circuit comprises resistance-capacitance depressurization branch road, rectifying and wave-filtering branch road, voltage stabilizing branch road, described rectifying and wave-filtering branch road, the parallel connection of voltage stabilizing branch road, and this parallel branch is connected with described resistance-capacitance depressurization branch road.

Described main control circuit also comprises intensity of illumination threshold values adjustment resistance, and the one end is connected in described power circuit, and the other end and described optical sensor are connected to the signal input pin of described MCU altogether.

Owing to adopted above scheme, set up the transducer of ambient light sensor and detection physical activity, the utility model mini light night satisfies at the same time: ambient lighting intensity is less than set point (concrete data can be adjusted as requested), when these two conditions of physical activity are arranged, just be unlocked, its opening time reduces significantly, avoided fully mini light night unmanned movable, continue illumination waste electric energy when not needing to use, its required electric energy reduces significantly, reaches the purpose of energy-conserving and environment-protective; And its automatic switch, greatly facilitate the user.

Because its required electric energy reduces significantly, make mini light night to have broken through the limitation of prior art with battery as power supply simultaneously, the use of mini light night no longer is confined to the place of electrical socket, greatly facilitates installing and using of mini light night.

[description of drawings]

Fig. 1 is the utility model schematic block circuit diagram;

Fig. 2 is the PIR controller principle figure that the utility model adopts;

Fig. 3 is the circuit theory diagrams of the utility model embodiment 1.

Fig. 4 is the circuit theory diagrams of the utility model embodiment 2.

[embodiment]

Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.

Embodiment one: please refer to shown in Figure 1ly, the intelligent mini light night of this example comprises that main control circuit, people's body heat release infrared sensor (PIR), optical sensor, power supply, lighting circuit; Light sensor probes ambient light intensity, PIR are surveyed the physical activity in the certain distance scope, and when ambient lighting intensity was set threshold values and PIR and detected physical activity less than one, main control circuit was opened conducting lighting circuit luminous lighting.

Main control circuit comprises that mainly PIR controls special-purpose MCU M7612 and realizes, the inner block diagram as a result of M7612 as shown in Figure 2, M7612 is a PIR controller that CMOS technology is integrated.Power consumption is very low, its internal structure adopts the simulation and the hybrid mode of digital hybrid circuit to design, comprising two-stage calculation amplifier, reference voltage generator, double threshold comparator, pulse duration detector, logic control element, operating time time-delay clock, schmitt trigger etc.

Please refer to shown in Figure 3ly, be these routine circuit theory diagrams, lighting circuit adopts the first light-emitting diode D1, the second light-emitting diode D2 parallel connection.When in the certain limit physical activity being arranged, PIR changes into the faint signal of telecommunication with the infrared ray that human body discharges, the signal of telecommunication send first order in-phase amplifier to amplify through the NII1 of M7612 pin, gain amplifier is by resistance R 2 and R5 decision, please in conjunction with shown in Figure 2, the signal that amplified is given second level inverting amplifier through capacitor C 2 couplings, gain amplifier is by R4 and R1 decision, signal after dual-stage amplifier amplifies is given the double threshold comparator, the double threshold comparator can be with signal intercept more by a small margin, signal is by the double threshold comparator when amplitude is bigger than to a certain degree, by the signal behind the double threshold comparator through the further filtering spurious signal of a pulse duration detector, prevent false triggering, give logic control element with useful signal at last and handle.

The power supply supply power voltage adds to the CDS pin of M7612 through resistance R 8 and photo resistance CDS dividing potential drop, CDS pin inside is a schmitt trigger, ambient lighting is strong more, the CDS resistance is more little, and CDS pin voltage is low more, otherwise, CDS pin voltage is high more, when intensity of illumination was set threshold values less than one, the schmitt trigger output HIGH voltage was given logic control element and is handled.The intensity of illumination threshold values can be adjusted by the resistance that changes R8.

Logic control element is judged according to the above-mentioned human activity signal, the ambient light intensity signal that detect, when having pulse output and schmitt trigger, pulse duration detecting is output as when high, the RELAY pin output high level of M7612, give the base stage of triode Q1 through resistance R 9, make the Q1 conducting, the first light-emitting diode D1, the second light-emitting diode D2 light.Resistance R 7, capacitor C 9 constitute the RC oscillator as the delay circuit clock with the M7612 internal circuit, can change the frequency of RC oscillator by the value that changes R7, C9, thereby the change delay time, if there is not triggering signal in time of delay, LED will be closed automatically.

Embodiment two: please refer to shown in Figure 4, in this example, power circuit adopts resistance-capacitance depressurization, capacitor C 10, resistance R 12, resistance R 13 are used for step-down, by the rectification of rectifier diode D3, the voltage stabilizing of voltage stabilizing didoe D4, the filtering of filter capacitor C11, become the operating voltage of 4.5v, supply with main control circuit, each transducer use.After human activity signal, the ambient light intensity signal common trigger first light-emitting diode D1, the second light-emitting diode D2 light,, close illumination automatically behind the time-delay certain hour by the hardware timing circuit or the internal clocking timing of main control circuit.

Claims

1, a kind of intelligent mini light night, it is characterized in that: comprise that main control circuit, people's body heat release infrared sensor, optical sensor, power circuit, lighting circuit, described people's body heat is released infrared sensor, optical sensor, lighting circuit and is electrically connected with described main control circuit respectively; Described power circuit is electrically connected with described main control circuit, lighting circuit respectively.

2, intelligent mini light night as claimed in claim 1, it is characterized in that: described main control circuit comprises MCU, delay circuit, switching circuit, described delay circuit, switching circuit are electrically connected with described MCU respectively.

3, intelligent mini light night as claimed in claim 1, it is characterized in that: described power circuit comprises the AC-DC conversion reduction voltage circuit, and input is used for the incoming transport civil power, and output is electrically connected with described main control circuit, lighting circuit.

4, as claim 1 or 3 described intelligent mini light nights, it is characterized in that: described power circuit comprises battery or battery pack.

5, as each described intelligent mini light night among the claim 1-3, it is characterized in that: described lighting circuit comprises first light-emitting diode (D1), second light-emitting diode (D2) in parallel.

6, intelligent mini light night as claimed in claim 2 is characterized in that: described delay circuit is the RC oscillator, can change the frequency of RC oscillator by the value that changes RC, thereby changes delay time.

7, intelligent mini light night as claimed in claim 2 is characterized in that: described switching circuit comprises switch triode (Q1), its base stage and the coupling of described MCU one output pin, and collector electrode is connected emitter grounding with described lighting circuit one end.

8, intelligent mini light night as claimed in claim 2, it is characterized in that: described main control circuit also comprises intensity of illumination threshold values adjustment resistance (R8), the one end is connected in described power circuit, and the other end and described optical sensor are connected to the signal input pin of described MCU altogether.

9, intelligent mini light night as claimed in claim 2, it is characterized in that: described delay circuit comprises electric capacity (C9), resistance (R7), described resistance (R7) end connects described power circuit, the other end and described electric capacity (C9) are connected to the signal input pin of described MCU altogether, described electric capacity (C9) other end ground connection.

10, intelligent mini light night as claimed in claim 3, it is characterized in that: described AC-DC conversion reduction voltage circuit comprises resistance-capacitance depressurization branch road, rectifying and wave-filtering branch road, voltage stabilizing branch road, described rectifying and wave-filtering branch road, the parallel connection of voltage stabilizing branch road, this parallel branch is connected with described resistance-capacitance depressurization branch road.