A sensor technology enabling “detection” that is the first step toward the IoT society.
Ultrasonic sensors employing ultrasonic waves are expected to come into widespread use in a variety of fields such as mobility. Learn basic knowledge about things like how ultrasonic waves work and how they can be used.
What is an ultrasonic sensor?
Generally speaking, the term “ultrasonic waves” refers to sound waves at frequencies higher than the range from low frequencies to the top of the audible frequency range (0 Hz to 20 kHz). Ultrasonic sensors receive and transmit ultrasonic waves by converting vibrations into electrical signals via the expansion and contraction of a piezoceramic material and by converting electrical signals into vibrations.
Basic knowledge: What is an ultrasonic sensor?
Properties of ultrasonic waves
Among the properties of ultrasonic waves are that their propagation speed differs depending on the medium through which they travel and that their directionality and resolution vary according to frequency. Such performance characteristics can affect the measurement distance and accuracy as well as the detection range.
Basic knowledge: Properties of sound waves
What can you do with ultrasonic sensors?
Since the propagation speed of ultrasonic waves differs depending on the medium, ultrasonic waves are either transmitted through or reflected by different media. This property of reflection is used mainly to detect the presence or state of objects, and for distance detection.
Basic knowledge: What can you do with sound waves?
Basic uses of ultrasonic sensors
Here we describe some precautions regarding aspects such as the housing and mounting to ensure efficient reception and transmission by ultrasonic sensors.
Basic knowledge: Basic uses
Features of each type of ultrasonic sensor
Learn about the features of the drip-proof type, high-frequency type, open structure type (lead type) and open structure type (SMD type).
Basic knowledge: Features of each type