Patent ID: 11898893
Assignee: ABB SCHWEIZ AG
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 9:
10. A non-invasive measurement method, comprising:
a) mounting a base material to a wall of a vessel containing a liquid, the base material comprising a plurality of outer faces, including a first face and a plurality of second faces, the first face being mounted to the wall of the vessel,
wherein a first one of the plurality of second faces is contiguous and angled to the first face at an angle less than an angle of 90 degrees internal to the base material, and is angled to a second one of the plurality of second faces at an angle greater than an angle of 90 degrees internal to the base material,
wherein a third one of the plurality of second faces is contiguous and angled to the first face at an angle less than an angle of 90 degrees internal to the base material, and is angled to a fourth one of the plurality of second faces at an angle greater than an angle of 90 degrees internal to the base material,
wherein a first piezoelectric element is mounted to the first one of the plurality of second faces,
wherein a third piezoelectric element is mounted to the third one of the plurality of second faces, and
wherein a fourth piezoelectric element is mounted to the fourth one of the plurality of second faces;
b) mounting a second piezoelectric element to the wall of the vessel at a position adjacent to the base material; and
c) activating the first piezoelectric element, the second piezoelectric element, the third piezoelectric element, and the fourth piezoelectric element.