Basic information of ultrasonic transducer

1. Ultrasonic transducers, what kind of pulses do they need to generate or obtain ultrasound? How to confirm the resonance frequency ?

   About ultrasonic transducer, the pulse required is a high-frequency pulse signal, and is determined by its driving frequency. As for the resonant frequency of the transducer,you could inquire us, or the impedance analyzer can be used for detection, and the circuit can be used for detection.You can select an appropriate method according to the actual situation of distance measuring transducer.
   

   
   

   
   

2. How to detect the impedance of the ultrasonic transducer? And, there are some impacts on the capacitance of the ultrasonic transducer?

   Ultrasonic distance measuring transducer is better than the impedance of the transducer. If it is to be detected, it is relatively simple to use an impedance analyzer. If you don't have one, you can take a look at the book about acoustic measurement experiment, which has some corresponding methods for specific operations. As for the capacitance effect of the ultrasonic transducer, because it is only a manifestation, it will affect the specific aspect of the transducer matching.

   
   

 3. Is the upper limit of the operating voltage on the ultrasonic transducer?

About distance measurement sensor, the upper limit of the operating voltage is      marked. Therefore, it cannot exceed assigned voltage . Otherwise, the transducer is easily damaged. For example, if the transducer is represented as PHA-34-12C, then its operating voltage is nominally 1500Vpp.

4.About ultrasonic transducers, how they properly disassemble them? How can they match circuit?

Firstly,They need to disassemble ultrasonic sensor circuit of the positive and negative wires, and then applying the degumming syrup to the contacting surface. After that, using a wrench to disassemble screws, and at the same time, dealing with the contacting faces , so that the ultrasonic transducer can be smoothly  removed. As for the matching circuit of the arduino ultrasonic sensor, in general, there is a certain difference between different products, but it is commonly used for series inductance matching.