Keywords: infrared, inductive switch, infrared radiation, detection area
This paper will introduce the principle of Doppler effect and put forward PT8A262 1 amplified micro-signal. Then the relay is driven to complete the on-off of infrared electric heating. This switch can measure the infrared rays of moving objects. Once in the measuring area, the switch will automatically turn on. This kind of invitation can be used for automatic switch in companies, hotels, shopping malls and other places, and can be sensed in alleys, stairs, bathrooms, warehouses and other places. The effect of bringing and leaving. It's novel and convenient, and it also reduces the cost of electricity and can resist theft. Its structure is very simple. It doesn't emit rays, and it is small in size, low in price, good in concealment, widely used, and has practical value in popularization.
Keywords: infrared, sensor switch, infrared radiation, detection area
China is the largest developing country in the world, and it is also a big producer and consumer of energy. Energy output is second only to the United States and Russia, ranking third in the world; Basic energy consumption accounts for L/ 10 of the world's total consumption, ranking second in the world after the United States. China is also a country with coal as the main energy source, and the contradiction between economic development and environmental pollution is more prominent. In recent years, energy security has increasingly become the focus of national life and even the whole society, and has increasingly become a hidden danger of China's strategic security and a bottleneck restricting the sustainable development of economy and society. Since 1990s, the sustained and rapid economic development in China has led to a sharp rise in energy consumption. Since 1993, China has changed from a net exporter of energy to a net importer. The total energy consumption has exceeded the total supply, and the external dependence of energy demand has risen rapidly. There are gaps in coal, electricity, oil and natural gas in China, so the concept of energy saving is particularly important. The central idea of energy conservation is to take measures that are technically feasible, economically reasonable and environmentally and socially acceptable, so as to use energy more effectively. In order to achieve this goal, it is necessary to carry out better scientific management and technological transformation from the development of energy resources to the terminal utilization, so as to achieve higher energy utilization efficiency and reduce energy consumption per unit product. Because conventional energy resources are limited, and with the development of industrial and agricultural production and the improvement of people's living standards, the total energy consumption in the world is increasing, all countries in the world attach great importance to the research of energy-saving technologies, especially to save coal, oil and natural gas in conventional energy, because these are precious chemical raw materials; As a clean and convenient energy source, electricity is widely used in our life and production, so energy saving of electric energy is particularly important. To save energy, we must first save energy, and then invent more humanized and energy-saving appliances through scientific research.
Pyroelectric infrared sensor is a kind of sensor that can detect infrared rays emitted by human or animals and output electrical signals. As early as 1938, it was proposed to use pyroelectric effect to detect infrared radiation, but it was not taken seriously. Until the 1960s, with the rapid development of laser and infrared technology, the research of pyroelectric effect and the application of pyroelectric transistor were promoted. Thermoelectric transistor has been widely used in infrared spectrometer, infrared remote sensing and thermal radiation detector, and can be used as an ideal detector for infrared laser. Its goal is to be widely used in various automatic control devices. Besides being used in the well-known corridor automatic switch and burglar alarm, it has broad application prospects in more fields. For example: air conditioners and water dispensers that automatically stop when the room is empty. A mechanism by which a television can judge that no one is watching or that the audience automatically turns off after sleep.
The purpose and significance of 1 infrared induction lamp control system research.
Objective: This topic is to design a control system of infrared induction lamp control system, understand the working principle of infrared induction lamp control system through this design, and then study the design method of infrared induction lamp control system.
Through the knowledge of analog circuit, the infrared induction lamp control switch circuit is designed, and then the photosensitive circuit composed of photoresistor controls the trigger of induction lamp switch, and the control switch and energy-saving lamp form a home lighting system.
Significance of the subject: In order to adapt to the development of the network era, the modern home lighting system should introduce the concept of intelligence. In the traditional home lighting system, it is generally integrated wiring and controlled by the switch of the knife, which has a short life and consumes a lot of electricity. However, in recent years, with the development of economy and the progress of science and technology, people have put forward higher requirements for energy saving and scientific management of lighting lamps, making lighting control more and more important in the intelligent field. In the upsurge of commercial housing construction, major real estate developers and developers have also realized the importance of intelligent lighting. The use of intelligent lighting control system can better reflect its advantages in energy saving and management. When the infrared intelligent power-saving switch is triggered, it does not need any sound, but the human body radiates infrared heat when walking, and finally controls the turn-on of the light. When people leave, it will go out automatically after a certain delay. Because it is different from acousto-optic control, it does not need sound and switch control, thus avoiding the intrusion of voice control noise. At the same time, because it is a control switch that senses human body heat, it avoids the loss of invalid electric energy and achieves the effect of energy saving.
At present, the most widely used lighting in public places (such as public corridors and stairwells) is the acousto-optic control delay lights and switches that appeared a few years ago. The appearance of this kind of lamps and switches has realized that people come to light and people go to turn off the lights, and now it has become the mainstream product of lighting switches in public places. Of course, this product does achieve the purpose of energy saving to a certain extent, but it also causes some damage to people's living environment. Due to the limitation of the product's own performance, the realization of this acousto-optic light control and switch automatic control needs the cooperation of sound (above 60 decibels), which has caused certain noise pollution to the quiet environment needed by the public.
With the development of society and people's concern for the ecological environment, the acousto-optic controlled lamps and switches have gradually failed to meet people's needs, which requires more energy-saving and environmental-friendly automatic lighting control products to meet people's needs for high-quality life.
Intelligent infrared energy-saving switch is a high-tech product based on mature infrared sensing technology and adding more high-tech elements, which has broad market prospects. Its appearance makes up for the defects of acousto-optic control technology. Its automatic control does not need the cooperation of sound and other conditions that will affect the environment, but the body radiates infrared heat to the outside world when walking, and finally realizes its automatic control function.
Present situation and development trend of infrared induction lamp control system
China Lighting lacks original products, mostly imitations, and its basic processing is backward. It only pays attention to appearance and ignores functions, and its products are single in variety and poor in performance. Especially in the aspect of "intelligent" lighting, there is insufficient innovation, and there is a big gap between the technical research and foreign intelligent lamps. At present, the lighting system in our country generally uses the main power supply to be divided into multiple distribution output lines through the distribution box to supply power to the lighting circuit, and the switch panel in series in the lighting circuit directly connects or disconnects the power supply line to realize the control of the lamp. There are only two states of lights, on and off, and there is no logic time sequence and dimming control, so it is impossible to form scene and system control of various lighting brightness combinations. The United States, Japan and other countries and China's Taiwan Province Province have predicted the benefits of LED lighting. In the United States, 55% of incandescent lamps and 55% of fluorescent lamps are replaced by LEDs, saving $35 billion in electricity bills and reducing 755 million tons of carbon dioxide emissions every year. In Japan, replacing 100% incandescent lamps with LEDs can reduce the power generation of 1 ~ 2 nuclear power plants every year, saving more than 1 100 million liters of crude oil consumption. In Taiwan Province province, 15% incandescent lamps are replaced by LEDs, saving110 billion kwh of electricity every year. Global energy shortage and environmental pollution are particularly prominent in China with rapid economic development. In order to realize the sustainable development of social economy in China, energy conservation and environmental protection are urgent problems to be solved. The annual electricity consumption for lighting accounts for about 12% ~ 15% of the total electricity consumption. As a big energy consumer, we must find an energy-saving and environmental protection light source that can replace the traditional light source as soon as possible. Compared with traditional lighting sources, LED has the advantages of lower power demand, better driving characteristics, faster response, higher earthquake resistance, longer service life, environmental protection and continuous improvement of luminous efficiency, which has become the development direction of China's lighting system in the future. Based on the current situation at home and abroad, especially the energy shortage, intelligent lighting is bound to be the development direction of future lighting systems. Intelligent lighting will make people use it more conveniently, improve the family environment, improve the management level and reduce the maintenance cost. It can not only provide various artistic effects for architectural lighting, but also make the control and maintenance of lamps easier, with high reliability and convenient installation and wiring.