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Physicochemical properties and application analysis of sensors
A sensor is a device that transforms physical or chemical quantities into electrical signals, which are easy to process and use. These devices play a crucial role in modern technology by enabling the measurement and monitoring of various parameters. Today, sensors are widely categorized based on different criteria.
Firstly, based on the type of physical or chemical quantity they measure, sensors can be classified into displacement, force, speed, temperature, flow, gas composition, and many others. Secondly, according to their working principle, they can be divided into resistive, capacitive, inductive, piezoelectric, Hall effect, photoelectric, grating, thermocouple, and more. Lastly, based on the nature of their output signal, sensors are grouped into switch-type (digital), analog, and pulse/digital types.
In practice, the static output of a sensor often follows a curved line rather than a straight one. To ensure uniform readings, a fitting line is typically used to approximate the actual characteristic curve. This approximation leads to a performance metric called linearity, or non-linearity error. There are several methods to select this fitting line, such as using the theoretical straight line connecting the zero input and full-scale output point, or the least squares method, which minimizes the square of deviations from each point on the curve.
Sensors have diverse applications across multiple industries. In household appliances like microwave ovens, air conditioners, and heaters, infrared temperature sensors are commonly used. They are also essential in medical devices, office automation, and industrial instruments. Moreover, they support advanced systems such as optical lenses, ASICs, and custom algorithms tailored to specific user needs.
Special equipment, including medical, environmental, and meteorological tools, relies heavily on high-performance sensors. The magnetic flap level gauge is an emerging market with significant growth potential. These sensors must evolve toward miniaturization, cost-effectiveness, and high reliability.
In industrial automation, sensors are vital for process control, machinery, and measuring variables like temperature, pressure, and flow. In communication electronics, the rise of smartphones with advanced features has increased the demand for sensors, including ultrasonic and magnetic field sensors.
In the automotive industry, the number and quality of pressure sensors reflect the sophistication of a vehicle's electronic control system. Modern luxury cars can have over 200 sensors, covering everything from motion to safety systems.
The resolution of a sensor refers to its ability to detect the smallest change in the measured value. If the input changes slowly, the sensor may not respond until the change exceeds a certain threshold. Once this threshold is crossed, the output will change accordingly.
At Huajiang Automation, we prioritize customer satisfaction and provide professional support for all sensor-related inquiries. Our team of experts is always ready to assist you. Whether you're looking for sensors, modules, or complete systems, we offer tailored solutions to meet your unique requirements. For more information, feel free to reach out.
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