What are the commonly used data acquisition chips
What are the commonly used data acquisition chips
1. Temperature sensor
Temperature sensor is a kind of equipment to measure temperature, which can be widely used in industry, automobile and other fields. At present, the commonly used temperature sensor chips are DS18B20, MAX31855, LM35 and so on.
The DS18B20 is a digital temperature sensor with a 1-Wire bus interface that can be connected directly to a single bus. It has the characteristics of high precision, low power consumption, waterproof and so on, and is widely used in the Internet of Things, smart home and other fields.
The MAX31855 is a chip that integrates a type K thermocouple input and a digital temperature sensor interface to directly read temperature values. It has the characteristics of high precision, low noise, automatic linear compensation, etc., and can be widely used in industry, automobile and other fields.
2. Acceleration sensor
Acceleration sensor is a device to measure acceleration, which can be widely used in smart phones, automotive electronics and other fields. At present, the commonly used acceleration sensor chips are ADXL345, MPU6050, BMI160 and so on.
The ADXL345 is a digital three-axis acceleration sensor that can read sensor data via an I2C bus or SPI bus interface. It has the characteristics of low power consumption, high precision and high sensitivity, and can be widely used in smart phones, tablet computers and other fields.
The MPU6050 is a six-axis motion tracker containing a three-axis acceleration sensor and a three-axis gyroscope. It has the characteristics of high precision, low power consumption, programmable motion detection, etc., and can be widely used in game controllers, electric toys and other fields.
The BMI160 is an intelligent low-power six-axis inertial measurement unit that can simultaneously measure triaxial acceleration and triaxial angular velocity. It has the characteristics of high precision, low power consumption, configurable digital filter, etc., and can be widely used in automotive electronics, power tools and other fields.
3, pressure sensor
Pressure sensor is a device to measure pressure, which can be widely used in the Internet of Things, smart home, automotive electronics and other fields. At present, the commonly used pressure sensor chips are MPX5700, MPXV5004 and so on.
The MPX5700 is a pressure sensor that measures pressure in the range of 0 to 700kPa. It has the characteristics of high sensitivity, low power consumption and high reliability, and can be widely used in air compressor, hydraulic control and other fields.
The MPXV5004 is a pressure sensor that measures pressure in the range of 0 to 3.92kPa. It has the characteristics of high precision, low noise, waterproof, etc., and can be widely used in tropical meteorology, barometer and other fields.
Working principle of data acquisition hardware
1. Refers to the collection of various physical quantities, signals and data into the computer. There are many ways of signal acquisition, analog signal acquisition and digital signal acquisition are common. Analog signal acquisition refers to the conversion of analog signal into digital signal, and the commonly used analog signal acquisition equipment includes analog converter and sampler. Digital signal acquisition refers to the direct acquisition of digital signals, the commonly used digital signal acquisition equipment includes digital converter and digital signal processor.
2.refers to the conversion of the collected signal into a digital signal that can be recognized and processed by the computer. There are many ways of signal conversion, common analog-to-digital conversion and digital-to-analog conversion. Analog-to-digital conversion refers to the conversion of analog signals into digital signals, and the commonly used analog-to-digital conversion equipment includes analog converters and samplers. Digital-to-analog conversion refers to the conversion of digital signals into analog signals, and the commonly used digital-to-analog conversion equipment includes digital converters and digital signal processors.
3. Refers to the processing and analysis of the collected signals. There are many ways of signal processing, the common ones are filtering, amplification, noise reduction and analysis. Filtering refers to the filtering of signals to remove noise and interference. Amplification refers to the amplification of the signal to enhance the strength and clarity of the signal. Noise reduction refers to the denoising of the signal to remove noise and interference. Analysis refers to the analysis and processing of the signal to get the characteristics and rules of the signal.
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