초록 ▼

An ultrasonic sensor includes an ultrasonic transmitter, an ultrasonic receiver and a support structure. First and second elongated tubes are mechanically coupled to and extend from the support structure. A first elongated waveguide is operably coupled to the ultrasonic transmitter and extends throu

An ultrasonic sensor includes an ultrasonic transmitter, an ultrasonic receiver and a support structure. First and second elongated tubes are mechanically coupled to and extend from the support structure. A first elongated waveguide is operably coupled to the ultrasonic transmitter and extends through the support structure and a bore in the first tube. The first waveguide is acoustically isolated from the support structure and first tube except at a distal portion of the first waveguide. A second elongated waveguide is operably coupled to the ultrasonic receiver and extends through the support structure and a bore in the second tube. The second waveguide is acoustically isolated from the support structure and the second tube except at a distal portion of the second waveguide. A measurement gap is located between the distal portions of the first and second waveguides.

대표청구항 ▼

[ What is claimed is:] [1.] An ultrasonic sensor comprising:an ultrasonic transmitter;an ultrasonic receiver;a support structure;first and second elongated tubes which are mechanically coupled to and extend from the support structure;a first elongated waveguide which is operably coupled to the ultra

[ What is claimed is:] [1.] An ultrasonic sensor comprising:an ultrasonic transmitter;an ultrasonic receiver;a support structure;first and second elongated tubes which are mechanically coupled to and extend from the support structure;a first elongated waveguide which is operably coupled to the ultrasonic transmitter and extends through the support structure and a bore in the first tube, wherein the first waveguide is acoustically isolated from the support structure and the first tube except at a distal portion of the first tube;a first acoustic coupling between a distal portion of the first waveguide and the distal portion of the first tube;a second elongated waveguide which is operably coupled to the ultrasonic receiver and extends through the support structure and a bore in the second tube, wherein the second waveguide is acoustically isolated from the support structure and the second tube except at a distal portion of the second tube;a second acoustic coupling between a distal portion of the second waveguide and the distal portion of the second tube; anda measurement gap located between the distal portions of the first and second waveguides.