CN201412709Y - An intelligent energy-saving lighting system - Google Patents

Abstract

An intelligent energy-saving lighting system, which solves the problem of power waste caused by inability to turn off the lights in time or false lighting of the lamps. Circuit and LED drive circuit, the pyroelectric infrared detector collects the infrared signal of the human body, and the light intensity signal collected by the photosensitive element. The output terminals of the above two are connected to the control circuit, and the control circuit outputs the control signal to the LED drive circuit, and the LED drive circuit outputs The driving signal is connected to the LED lighting circuit. The utility model has the advantages of automatically adjusting the light intensity according to the environment of the house and the outdoor light intensity, and automatically turning off the electric light when no one is judged, so as to avoid waste.

Description

An intelligent energy-saving lighting system

technical field

The utility model relates to an LED lighting system, in particular to an intelligent energy-saving lighting system.

Background technique

With the increasingly sharp energy contradiction, energy conservation has been widely concerned. The annual lighting consumption accounts for about 20% of the total electricity consumption of the society, accounting for about 8% of the total energy consumption of various forms in the whole society. Therefore, energy conservation in the lighting field Become an important part of the energy-saving torrent of the whole society.

Today's society's requirements for lighting have also undergone great changes. At present, in many public places, especially in enterprises and institutions, the phenomenon of waste of electric energy occurs from time to time. People often go to the empty offices where the lights are brightly lit, and the voice-activated lights no matter External noise during the day and night will cause false lighting, or delay turning off the lights when there is no need for lighting, which causes great waste and affects the life of the lamps.

Contents of the invention

The utility model provides an intelligent energy-saving lighting system. In order to solve the problem of electric energy waste caused by the inability to turn off the lights in time or the lighting of the lamps by mistake, an intelligent energy-saving lighting system is designed. brightness.

In order to achieve the above purpose, the design scheme adopted by the utility model is an intelligent energy-saving lighting system. The circuit structure includes a power supply and an LED lighting circuit. The power supply outputs a DC voltage signal to the LED lighting circuit. The technical improvement is that the lighting In the system, a pyroelectric infrared detector, a photosensitive element, a control circuit and an LED drive circuit are added to detect the human body. The pyroelectric infrared detector collects the infrared signal of the human body and the light intensity signal collected by the photosensitive element. The output terminal is connected to the control circuit, the control circuit outputs a control signal and sends it to the LED driving circuit, and the LED driving circuit outputs the driving signal to connect to the LED lighting circuit.

The utility model has the beneficial effects of automatically adjusting the light intensity according to the environment of the house and the outdoor light intensity, and automatically turning off the electric light when no one is judged, so as to avoid waste.

Description of drawings

Fig. 1 is the functional block diagram of the utility model circuit.

Fig. 2 is a connection embodiment of the LED driving circuit and the LED lighting circuit of the present invention.

Fig. 3 is the embodiment of the utility model control circuit.

In Fig. 1, 1 is a power supply circuit, 2 is a pyroelectric infrared detector, 3 is a photosensitive element, 4 is a control circuit, 5 is an LED driving circuit, and 6 is an LED lighting circuit.

In Figure 2 and Figure 3, WR1 and WR2 are photoresistor pairs, AP-2B320 is a power integrated block, R1, Ra, Rb, Rn are resistors, C1 is capacitor, Q is thyristor, L1a, L1n, L1b, Lnb , L1n, Lnn are light-emitting diodes, ADC0832 is an A/D conversion chip, 89C55 is a single-chip microcomputer, DAC7226 is a D/A conversion chip, and LF is a comparator.

Below in conjunction with accompanying drawing illustrate how the utility model is specifically realized.

Detailed ways

An intelligent energy-saving lighting system. The circuit structure includes a power supply and an LED lighting circuit. A pyroelectric infrared detector 2 capable of detecting a human body, a photosensitive element 3, a control circuit 4 and an LED driving circuit 5 are added to the lighting system. The pyroelectric infrared detector 2 collects the infrared signal of the human body and the light intensity signal collected by the photosensitive element 3. The output terminals of the above two are connected to the control circuit 4, and the output control signal of the control circuit 4 is sent to the LED driving circuit 5, and the LED driving circuit 5 outputs The driving signal is connected to the LED lighting circuit 6 .

The above-mentioned pyroelectric infrared detector 2 adopts a Fresnel filter chip, a Fresnel lens, a pyroelectric sensor, an MP01 chip and a peripheral circuit for supporting overlapping.

The above-mentioned photosensitive element 3 adopts a pair of photoresistors WR1 and WR2.

The above-mentioned control circuit 4 includes A/D conversion chip ADC0832, single-chip microcomputer 89C55, D/A conversion chip DAC7266 and peripheral supporting components. The human body infrared signal collected by the detector 2 is processed and sent to the single-chip microcomputer 89C55, and the output control signal of the single-chip microcomputer 89C55 is sent to the LED driving circuit 5 after being processed by the D/A conversion chip DAC7266.

The above-mentioned LED drive circuit 5 includes an AC bypass channel composed of a thyristor Q, a resistor R1 and a capacitor C1. The base of the thyristor Q receives the control signal processed by the control circuit 4, and realizes LED lighting by changing its own internal resistance. Circuit 6 for brightness adjustment.

The above-mentioned LED lighting circuit 6 is a group of LED light strings connected in parallel, and the positive end of the LED light string receives the DC signal processed by the power supply integrated block AP-2B320 in the power supply circuit 1 .

When the utility model is actually used, the photosensitive element 3 and the pyroelectric infrared detector 2 are used to detect the light intensity signal and the human body infrared signal in the room in real time. When the room is too bright, the output power of the LED lighting circuit 6, that is, the brightness, can be automatically reduced by the LED driving circuit 5; when the room is too dark, the brightness of the LED lighting circuit 6 can be automatically increased by the LED driving circuit 5, and the reference light Strong signal can be set by single chip microcomputer 89C55 and supporting program. The adjustment of the brightness of the LED lighting circuit 6 is realized by changing the internal resistance of the power supply through the thyristor Q, and the AC bypass channel composed of the resistor R1 and the capacitor C1 is used for steady current regulation, so that the output of the LED lighting circuit 6 is more stable.

Considering the problem of further reducing energy waste, the utility model is also provided with a pyroelectric infrared detector 2, which can collect human body infrared signals. The detector has three key components: Fresnel filter chip, which acts as a bandpass filter through the filter chip with a cut-off wavelength of 8-12 μm; Fresnel lens, focusing function, which is about to refract the infrared signal released (Reflection) On the pyroelectric infrared sensor, the second function is to divide the warning area into several bright areas and dark areas, so that moving objects entering the warning area can be reflected on the pyroelectric infrared sensor in the form of temperature changes. Generate changes in the pyroelectric infrared signal; the pyroelectric infrared sensor converts the change of the infrared radiation energy passing through the filter chip into an electrical signal, that is, thermoelectric conversion. When the pyroelectric infrared detector 2 cannot detect the infrared signal of the human body, the output current is controlled by the thyristor Q in the single-chip microcomputer 89C55 and the LED drive circuit 6 so that the LED light string is extinguished; when the infrared signal of the human body is detected , and then control the thyristor Q to increase the current to turn on the LED light string. In this way, intelligent automatic control is realized when no one is watching, not only can automatically adjust the brightness of the LED light string, but also control the switch of the LED light string.

Claims (6)

1. An intelligent energy-saving lighting system. The circuit structure includes a power supply and an LED lighting circuit. The power supply outputs a DC voltage signal to the LED lighting circuit. Pyroelectric infrared detector (2) and photosensitive element (3), control circuit (4) and LED drive circuit (5), pyroelectric infrared detector (2) collects infrared signal of human body, photosensitive element (3) collects light intensity signal, the output ends of the above two are connected to the control circuit (4), the control circuit (4) outputs the control signal and sends it to the LED drive circuit (5), and the LED drive circuit (5) outputs the drive signal to connect the LED lighting circuit (6). 2. An intelligent energy-saving lighting system according to claim 1, characterized in that: the pyroelectric infrared detector (2) adopts a Fresnel filter chip, a Fresnel lens, a pyroelectric sensor, The MP01 chip and the peripheral circuit are connected together. 3. An intelligent energy-saving lighting system according to claim 1, characterized in that: the photosensitive element (3) is a pair of photoresistors (WR1, WR2). 4. An intelligent energy-saving lighting system according to claim 1, characterized in that: the control circuit (4) includes an A/D conversion chip (ADC0832), a single-chip microcomputer (89C55), a D/A conversion chip (DAC7266 ) and peripheral supporting components, the A/D conversion chip (ADC0832) receives the light intensity signal collected by the photoresistor pair (WR1, WR2) and the human body infrared signal collected by the pyroelectric infrared detector (2), and sends it to the single chip microcomputer ( 89C55), the output control signal of the single chip microcomputer (89C55) is sent to the LED drive circuit (5) after being processed by the D/A conversion chip (DAC7266). 5. An intelligent energy-saving lighting system according to claim 1, characterized in that: said LED drive circuit (5) includes an AC bypass composed of a thyristor (Q), a resistor (R1) and a capacitor (C1). The base of the thyristor (Q) receives the control signal processed by the control circuit (4), and adjusts the brightness of the LED lighting circuit (6) by changing its own internal resistance. 6. An intelligent energy-saving lighting system according to claim 1, characterized in that: the LED lighting circuit (6) is a group of LED light strings connected in parallel, and the positive end of the LED light string receives the power supply circuit (1 ) DC signal processed by the power integrated block (AP-2B320).

Images