In recent years, with the continuous improvement of people's requirements for home and office space, we must fully consider the issue of energy conservation and environmental protection while creating a smart home environment. Taking smart lighting as an example, under the background of the country's efforts to promote energy conservation and emission reduction, the on-demand environmental lighting system that achieves the best of both worlds in energy conservation and comfort has entered the stage of verification experiments through the research stage. Among them, as the key to detecting the number of people and the location of people, the demand for sensory sensors is constantly rising.
At present, thermoelectric sensors that are generally used for human-sensing sensors cannot detect stationary people. Therefore, it is very difficult to detect the number of people and the locations of people in real time. In view of this situation, OMRON has developed a temperature detection system that can detect a static person, has a wide field of view of 90 degrees and can realize a high-precision area, and a MEMS non-contact temperature sensor for human sensor (1*8, 4* 4 unit type).
Hello everyone
I am a temperature sensor from OMRON
First of all, I want to tell you about my composition.
Ultra-small is my characteristic! You can't underestimate my small size. I did it with the thermopile components and the ASIC in the same package and realized the ultra-small non-contact thermopile array sensor module. All this made possible. Thanks to Omron's advanced MEMS production technology ~ HOHO
Let's introduce my working principle
I used the thermopile of MEMS technology to convert the infrared energy emitted by a target object into heat energy, and measured the temperature by the thermoelectromotive force formed by the temperature difference between the two metal contacts. According to the Seebeck effect, the connection of two kinds of metals occurs. The temperature difference will form an electromotive force.
Tips
temperature
Objects with higher temperatures than absolute zero (-273°C) emit infrared light, which means that all objects on Earth emit infrared light.
wavelength
Infrared rays are invisible to the naked eye and can cause objects to rise in temperature if they hit the surface of the object. It is a longer light wave (0.8 to 1000 μm) than visible light.
The relationship between infrared and temperature
High temperature: Infrared light with a short wavelength emits more (strongly).
Low temperature: Long-wavelength infrared light will be emitted less (weakly).
If infrared rays are captured, the temperature of the object can be measured in a non-contact state.
Finally come to understand my workplace
On the one hand, I will be active in air conditioners, televisions, and security equipment. Through human detection, I will be able to save electricity and quickly control functions. On the other hand, I will also appear in microwave ovens, IH heating, and industrial equipment. Through the detection of non-contact temperature, the task of adjusting the temperature and predicting the abnormal heating failure is completed.
Original transferred from Omron Electronic Components
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