In fact, in the electromagnetic wave, only the microwave is suitable for the vehicle reversing radar, otherwise the wavelength is longer than the car, and its accuracy cannot guarantee the safety of reversing. Below I will use microwaves to represent electromagnetic waves.The reversing radar has an

The vibration of the object can generate fluctuations.The mechanical wave with a frequency between 16 Hz and 20 kHz can cause human hearing. The mechanical wave in this band is called sound wave. Ultrasonic frequencies below 20 kHz are called infrasound waves, and flat frequencies above 20 kHz are c

In order to improve the anti-interference ability and measurement accuracy of the ultrasonic ranging system, an appropriately selected PN can be used.The code replaces the single pulse signal as the encoded information. The noise signal is uncorrelated with the encoded information can be filtered by

Modeling and experiment of ultrasonic transducer in the air medium, the frequency band of the ultrasonic sensor is generally narrow, which directly affects its detection performance for high-speed moving targets. In order to solve the narrow band of the ultrasonic sensor, a micro-miniature transduce

The phase estimation method of time delay estimation is a practical method to improve the accuracy of ultrasonic delay estimation. Based on the fact that for a simple harmonic, the fourier transform (DFT) can be used to calculate its fourier coefficient corresponding to the resonant frequency, and t

In the industry, the typical application of ultrasonic distance transducers are non-destructive testing of metals and ultrasonic thickness measurement. In the past, many technologies were hindered by inability detecting the inside of objects, and the emergence of ultrasonic sensing technology change

As the medium for transmitting information, ultrasonic is more and more important in various fields such as flaw detection, ranging, and speed measurement due to its direct and reflective properties and its characteristics that are not easily affected by external factors such as light and electromag

What are the distance methods for ultrasonic distance transducer?In the ultrasonic distance transducer,distance methods generally have a single-shot dual-receiving type, and it is also a sonic logging method. In terms of composition, there are mainly three sound systems, sound insulators and electro

high-temperature thin-film ultrasonic transducerA wide range of high-temperature thin-film ultrasonic transducer are introduced. high-temperature thin-film strain gauges and high-temperature thin-film strain gauges are used for alloy thin films duo to the sensitive

New technology application of ultrasonic sensor (二) Some ultrasonic transducers use separate transmitters and receivers. When it is detecting slow-moving objects, or when they need to respond quickly, when underwater ultrasonic distance sensors are used in the wet environments, this type of beam-gui

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Ultrasonic sensors apply to parking sensor systemPrinciples of measuring distanceThe example of pulse transmitting circuitBy the ultrasonic sensor, conBy the ultrasonic sensor, control and display (or buzzer) and local composition of ultrasonic distance transducer , it can tell the driver his around obstacles by voice or a more intuitive display case. Relieve the driver stop, reverse and start to visit around the vehicle caused by problems, and to assist the driver to clean the line of sight angle and sight ambiguous death of the shortcomings of progressive drive insurance. trol and display (or buzzer) and local composition of ultrasonic distance transducer , it can tell the driver his around obstacles by voi

applications of ultrasonic distance transducer the basic principle of ultrasonic distance measurement is that the ultrasonic emission transducer emits waves