Directional object detection with soundpipes
In order to limit the sound beam of ultrasonic sensors, sensor specialist PiL Sensoren, which is part of the Inelta Group, offers special cylindrical sound reduce pipes for some of its ultrasonic sensors.
These reduce the sound beam of the ultrasonic waves and reduce the scanning range at the same time. By limiting the sound waves using a defined hollow cylinder, interfering objects in the boundary area of the sound beam are masked out. This enables targeted focusing on the target object.
To avoid scattering or absorption losses, the manufacturer matches the material and dimensions to the acoustic properties of the sound pipe. The shape and length of the attachment are adapted by PiL to the ultrasonic frequency of the transducer of an ultrasonic sensor in order to ensure precise and reliable measurements even in very narrow detection ranges through targeted frequency selection and alignment of the sensor in combination with the soundpipe.
Typical areas of application for sound pipes include level measurement in pipes with very small diameters – for example in medical technology, in filling or capsule closing systems. In the case of sensors arranged very close together – such as in arrays for height profile monitoring – sound pipes are used not only to synchronize the sensors on the control side but also to suppress interference-related disturbances.
PiL supports its customers in selecting and equipping the sensor technology with appropriate noise reduction pieces and also manufactures customer-specific special solutions on request.
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