ultrasonic transducers for parking sensor

In the past 20 years, the development of piezoelectric ultrasonic transducers at home and abroad has been very rapid due to its advantages of simple production, low cost, and good stability. It has been widely used in the fields of electronics, optics, heat, acoustics, etc., and has broad development prospects. Made by the electronic piezo ceramics, ultrasonic transducers for distance can produce supersonic waves with good directivity. Ideal for measuring parameters such as speed and distance. It can work stably and reliably even under the harsh environmental conditions. 

ultrasonic transducers for parking sensor refers to sound waves with frequencies are above 20 kHz. which is a kind of mechanical wave because it has good directionality and tolerance for the environment and is used in the torque measurement technology. Ultrasonic ranging detector is a non-contact ranging technology method. There are mainly pulse method and frequency conversion method .The main method of pulse-distance measurement is pulse method. The pulse method directly measures the time of the carrier pulse signal is traveling back and forth on the distance to be measured to find the distance value, The D is the ultrasonic distance sensor to be measured, and V is the propagation speed of the carrier in the air. Z is the carrier round-trip time.

The accuracy of the pulse method ranging is affected by the accuracy of the time measurement and the accuracy of the long range distance transducer is affected by the oscillation frequency. AD = VAt/Z If ultrasonic waves are used as the carrier, the ranging accuracy AD1 cm requires measurement accuracy .That is, as long as the oscillation frequency reaches 1.7, it is very easy to implement. The positive piezoelectric effect can also be used to convert receiving ultrasonic vibrations into electrical signals. This is the working principle of ultrasonic transducers. Piezoelectric ultrasonic transducers can be regarded as four-terminal networks with electrical and mechanical ends. The relationship between the force F at the mechanical end and the voltage U. the voltage V 80khz distance transducer is at the electrical terminal and the current can be commonly used. The force impedance 9YU at a constant voltage V (or electrical short-circuit) is an electrical admittance 9A at a constant speed. U is called a force factor.These parameters are generally a function of frequency.