Ultrasonic sensor and method of using such a sensor
AssigneeImra Europe SAS
InventorPierre Bonnefoy
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Abstract
A ultrasonic sensor for detecting the location of objects disposed in a substantially gaseous environment includes a plurality of nodes arranged into a uniform network. A plurality of circular transducers are provided such that each transducer is disposed at a node. The center of adjacent transducers are spaced at a distance no greater than the wavelength of acoustic waves emitted by the transducers. A method of detecting the location of objects disposed in a substantially gaseous environment is also disclosed.
Claims9
An ultrasonic sensor for detecting the location of objects disposed in a substantially gaseous environment, comprising:
- a plurality of nodes arranged into a uniform network;
- and
- a plurality of circular transducers that operate at a specified set of frequencies, each transducer having a diameter of approximately a wavelength of acoustic waves emitted by the transducers and having a center and disposed at a node such that the center of adjacent transducers are spaced at a distance no greater than the wavelength of acoustic waves emitted by the transducers, wherein the transducers are arranged into several rows, the transducers of each row sharing a common axis, such that the axes intersect at a center of a common central transducer.
A method of detecting the location of objects disposed in a substantially gaseous environment, comprising the steps of:
- specifying a shape of at least one object disposed in the substantially gaseous environment;
- emitting an ultrasonic wave from a sensor including a plurality of circular transducers the diameter of which is approximately the wavelength of acoustic waves emitted by the transducers, each transducer disposed at one of a plurality of nodes arranged into a uniform network such that the center of adjacent transducers are spaced at a distance no greater than the wavelength of the ultrasonic waves emitted, the wave propagating within the substantially gaseous environment;
- receiving an echo from the wave;
- and
- analyzing the echo to determine the position of the object within the substantially gaseous environment.
A method according to the steps of claim 6, wherein the receiving step includes using the transducers to receive the echo from the wave.
A method according to the steps of claim 6, further comprising the step of arranging the transducers into rows such that the receiving step includes receiving the echo from the wave with transducers disposed at ends of the rows.
Dependencies are inferred from the claim text.