As an important part of modern science and technology, the sensor is widely used. From industrial automation to smart homes, from healthcare to environmental protection, sensors play a vital role. They can sense and measure various physical quantities, such as temperature, pressure, light intensity, sound, etc., and convert this information into electrical signals that can be processed and transmitted. This conversion capability makes sensors a bridge between the physical and digital worlds, providing the necessary data input for a variety of intelligent systems and devices. With the continuous advancement of technology, the accuracy, stability and reliability of sensors are also improving, providing the possibility for a wider range of application scenarios.