Test method of ultrasonic sensor

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【概要描述】As a detection device, the ultrasonic sensor can not only sense the measured information, but also transform the detected information into electrical signals according to certain rules, or other required forms of information output. However, the output signal of the sensor should be easy to transmit, process, store, display, record and control information. With the development of electronic and microelectronic technology, the development of the sensor is also changing with each passing day. There are more and more applications and types of sensors in production and life. For example, wireless sensor, radar sensor, infrared light temperature sensor, geomagnetic object detection sensor, etc. Ultrasonic sensor is one of the most widely used sensors. Ultrasonic sensor uses the characteristics of ultrasonic technology for sensing. The application of sensor detection based on the volume, material, and movability of the detected object includes: whether there is detection: whether the object is detected/in place/count; Color detection: detect the color/concentration of objects; Dimension measurement: length/width/height/thickness/temperature/distance; Deviation correction inspection: appearance inspection. However, the ultrasonic sensor adopts different detection methods. The common detection methods are as follows: Penetrating type: the transmitter and receiver are located on both sides respectively. When the detected object passes between them, it will be detected according to the attenuation or occlusion of the ultrasonic wave. Limited distance type: the transmitter and receiver are located on the same side. When there is a detected object passing within the limited distance, the detection is carried out according to the reflected ultrasonic wave. Regression reflection type: the transmitter and receiver are located on the same side, and the detection object is taken as the reflection surface, and the detection is carried out according to the attenuation of the reflected wave. Limited range type: the transmitter and receiver are located at the center of the limited range, the reflector is located at the edge of the limited range, and the attenuation value of the reflected wave when there is no object to be detected is taken as the reference value. When there is an object to be detected in the limited range, the attenuation value is compared with the reference value according to the attenuation condition of the reflected wave for detection.

As a detection device, the ultrasonic sensor can not only sense the measured information, but also transform the detected information into electrical signals according to certain rules, or other required forms of information output. However, the output signal of the sensor should be easy to transmit, process, store, display, record and control information. With the development of electronic and microelectronic technology, the development of the sensor is also changing with each passing day. There are more and more applications and types of sensors in production and life.
For example, wireless sensor, radar sensor, infrared light temperature sensor, geomagnetic object detection sensor, etc. Ultrasonic sensor is one of the most widely used sensors. Ultrasonic sensor uses the characteristics of ultrasonic technology for sensing.
The application of sensor detection based on the volume, material, and movability of the detected object includes: whether there is detection: whether the object is detected/in place/count; Color detection: detect the color/concentration of objects; Dimension measurement: length/width/height/thickness/temperature/distance; Deviation correction inspection: appearance inspection. However, the ultrasonic sensor adopts different detection methods. The common detection methods are as follows:
Penetrating type: the transmitter and receiver are located on both sides respectively. When the detected object passes between them, it will be detected according to the attenuation or occlusion of the ultrasonic wave.
Limited distance type: the transmitter and receiver are located on the same side. When there is a detected object passing within the limited distance, the detection is carried out according to the reflected ultrasonic wave.
Regression reflection type: the transmitter and receiver are located on the same side, and the detection object is taken as the reflection surface, and the detection is carried out according to the attenuation of the reflected wave.
Limited range type: the transmitter and receiver are located at the center of the limited range, the reflector is located at the edge of the limited range, and the attenuation value of the reflected wave when there is no object to be detected is taken as the reference value. When there is an object to be detected in the limited range, the attenuation value is compared with the reference value according to the attenuation condition of the reflected wave for detection.

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