At this stage, various sensors have been widely used in various fields: industrial inspection, automated control systems, automotive sensors, household appliance sensors, mobile medical sensors, aerospace and remote sensing technologies. The national standard GB7665-87 defines a sensor as "a device or device that can be measured and converted into a usable signal according to a certain rule, usually composed of a sensitive component and a conversion component."
The sensor is the primary link to realize automatic detection and automatic control. It can sense the measured information, and can transform the detected information into a signal or other required form of information output according to a certain law to meet the information transmission. Requirements for processing, storage, display, recording, and control.
The following is a brief introduction to the application of several widely used sensors in different fields. I hope to help you inspire the design.
Cell phone sensor signal acquisition
I saw a more interesting mobile phone sensor (Samsung S5) on the sharing, integrating six-axis, heart rate, air pressure, distance and gesture recognition sensors, as follows:
HRM sensor: MAX86900A
Barometer sensor: LPS25HTR
6 Axis sensor (six-axis sensor, three-axis acceleration + three-axis gyroscope): MPU-6500M
MagneTIc sensor (Geomagnetic / Gravitational Sensor): AK09911C
Gesturte sensor: TMG39923S9INT20
Proximity sensor:
The sensor circuits used in the mobile phone are highly integrated in one chip, complete the processing of the signals that need to be collected, and then transfer the data to the CPU through I2C, taking the distance sensor as an example (detecting the face close to automatically turn off the screen when making a call) The simple signal processing block diagram is as follows:
The light analog input enters the sensor through CH0/CH1, enters the ADC through the amplifier and filter, and the wavelength analog quantity is converted into digital quantity, and then the interrupt or I2C read data is generated according to the application requirements.
UMC CMOS image sensor
UMC's sensor solutions have been extensively applied in a variety of applications 
United Power (CIS) solution
In the era of increasing popularity, MEMS sensors have emerged as the most important sensing interface for the Internet of Things. UMC launched a complete line of MEMS application ICs, pure MEMS and CMOS-MEMS for the wearable and smart terminal markets.
Lianhua series MEMS process modules, such as DRIE, double side aligner, VHF, etc., assist customers in the production of MEMS structures in CMOS wafer specialists.
UMC offers high-performance CMOS image sensor (CIS) solutions to meet customer needs, including pixel sizes from 1.1 to 3.2, color filter arrays (CFA) and microlenses (uLens) to help customers save on images Sensor supply chain management resources and shorten production cycles.
UMC's image sensor solutions have been adopted by leading global imaging sensors for mainstream applications such as portable devices, medical devices, ambient light sensors, and monitors. In addition, UMC's image sensor solutions offer other flexible process options, such as image sensor splicing processes, to meet the specific needs of customers.
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