Advantages and principles of ultrasonic transducer

　What are the advantages of ultrasonic sensors

　　 Ultrasonic transducer sensor is a sensor that converts ultrasonic signals into other energy signals (usually electrical signals). It is more common in production and life, such as car reversing radar, robot automatic obstacle avoidance walking, construction sites and some industrial sites such as liquid level, well depth, pipeline length, etc. It is often seen in occasions where automatic non-contact ranging is required. . So, what are the advantages of ultrasonic gas flow transducer sensors that make it useful in these occasions?

　　In general, the strong ability of ultrasonic sensors to resist environmental interference is an important reason for their popularity. Its advantages are embodied in the following aspects:

　　1. High sensitivity, strong penetrability

　　 The high sensitivity and penetrating power of the ultrasonic sensor make it easier to detect deep objects from the outside.

　　 2. Can be used at night and in dark environments

　　 Unlike proximity sensors that rely on light sources or cameras, acoustic wave sensors can detect stably and reliably in dark environments where there is no light, without being affected at all.

　　3. High measurement accuracy

　　 Ultrasonic sensors have high accuracy in measuring the distance between the sensor and the parallel surface.

　　 4. The color or transparency of the object has no effect on the measurement

　　 Since the ultrasonic sensor measures the position of the object through reflected waves, the color or transparency of the measurement object has no effect on the reading of the ultrasonic sensor.

　　 5. Dust, dirt or high humidity environment has no influence on the measurement of ultrasonic gas sensor,Other sensors can work well in dust, dirt or high humidity environments, but under extreme conditions, a large amount of dust or water will accumulate and affect the measurement. The ultrasonic sensor is not affected by the above-mentioned harsh working conditions and can achieve reliable measurement of the liquid level.

　　Ultrasonic sensor principle

　　 The main materials of ultrasonic sensors are piezoelectric crystal and nickel-iron-aluminum alloy. The ultrasonic sensor composed of piezoelectric crystal is a reversible sensor, which can convert electrical energy into mechanical oscillation to generate ultrasonic waves. At the same time, it can also be converted into electrical energy when receiving ultrasonic waves.

　　 Ultrasonic range sensor is a sensor that converts ultrasonic signals into other energy signals (usually electrical signals). Ultrasound is a mechanical wave with a vibration frequency higher than 20kHz. It has the characteristics of high frequency, short wavelength, small diffraction phenomenon, especially good directivity, which can become rays and propagate directionally. Ultrasound has a great ability to penetrate liquids and solids, especially in solids that are opaque to sunlight. When the ultrasonic hits the impurities or the interface, it will produce a significant reflection to form a reflected echo, and it can produce a Doppler effect when it hits a moving object. Ultrasonic sensors use acoustic medium to perform non-contact and wear-free detection of the detected object. Ultrasonic sensors can detect transparent or colored objects, metal or non-metal objects, solid, liquid, and powdery substances. Its detection performance is hardly affected by any environmental conditions, including smoke and dust environments and rainy days.