Smart sensors have been widely used in various industries in our country
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- 发布时间：2021-10-09
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【概要描述】 The differential pressure switch is a kind of differential pressure sensor. It uses MEMS technology. It can provide many normally closed and normally open nodes, without moving components, and is no
Smart sensors have been widely used in various industries in our country
【概要描述】 The differential pressure switch is a kind of differential pressure sensor. It uses MEMS technology. It can provide many normally closed and normally open nodes, without moving components, and is no
- 分类：Industry News
- 作者：
- 来源：
- 发布时间：2021-10-09
- 访问量：0
详情
The differential pressure switch is a kind of differential pressure sensor. It uses MEMS technology. It can provide many normally closed and normally open nodes, without moving components, and is not sensitive to orientation, has good repeatability and use Long life and other advantages, it has a wide range of applications, such as in the fields of variable wind systems and HVAC systems.
The differential pressure sensor needs to be installed in accordance with certain regulations or through a certain design structure. It can effectively convert the change before and after the pressure into the relevant change of the pressure sensitive element, and then the weak signal formed by the deformation of the sensitive element The output is processed and modulated, or it is processed through analog-to-digital conversion and chip arithmetic processing to output a digital signal.
Now take the capacitive differential pressure sensor as an example to introduce its working principle. The different pressures of the pressure transmitter on both sides of the measured substance pass through the high and low pressure chambers respectively, and act on the isolation diaphragms on the two edges of the sensitive element, and then pass through the element and the filling solution in the isolation sheet. It is transported to both sides of the processing diaphragm, and the electrodes and the measuring diaphragm on both sides of the insulating sheet form a capacitor respectively.
When the pressure on both sides is different, the measuring diaphragm will form a certain displacement, and its displacement is proportional to the pressure difference, so the capacitance on both sides is different, then After the link of oscillation and demodulation, it can be converted into a signal proportional to the pressure. Finally, the signal can be modulated to obtain the modulated current smoothly. The current in the demodulator can be obtained by using an A/D converter. Effectively converted into a digital signal, the microprocessor can use this value to judge the input pressure value, and finally the microprocessor controls the relevant work of the pressure sensor.
In fact, in real life, if everyone does not have a comprehensive understanding of the sensor principle mentioned above, the following should be very clear.
1. Smart sensors are now commonly used in industrial production, agricultural production, national defense, aerospace, and other fields. Optical alarms, humidity alarms, temperature alarms, and water level alarms are all smart sensors.
2. The electronic scale actually measures the pressure of the object corresponding to the variable plate according to the relevant principle of the mechanical sensor, so that the measured weight can be obtained.
3. The water supply in the community is generally controlled within a certain range of water pressure, which requires a pressure sensor to measure the water pressure.
4, digital cameras and mobile phone cameras, etc., all work based on optical sensors, which can effectively capture relevant images.
5. The smoke alarm used in daily life measures the concentration of smoke based on the smoke resistance, so that the purpose of alarming can be effectively accomplished.
6. Automatic doors are already in use in many places. They open and close the doors according to the infrared microwave of the human body.
In short, sensors are widely used in reality, as long as you observe carefully, you can find many. Pressure sensor is the most widely used one. With the development of science and technology, future products will be more integrated and intelligent, with more comprehensive functions.
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“Chengdu Huitong West-electronic.,Ltd”(HTW for short) was established in 2007 and is a professional manufacturer of piezoelectric ceramic materials and piezoelectric ceramics R&D, production and sales. So far, he has more than 40 years of experience in the development and production of electroceramic materials and piezoelectric devices.
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