# US 10,768,147 B2 · Probe approach for DGS sizing

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- Number: US 10,768,147 B2
- Document ID: US10768147B2
- Status: Granted
- Kind: B2
- Application number: 16/241,383
- Filed: 2019-01-07
- Published: 2019-07-11
- Granted: 2020-09-08
- Earliest claimed: 2012-12-06
- Assignees: General Electric Company
- Applicants: General Electric Company
- Inventors: York Oberdoerfer; Roman Heinrich Koch; Wolf-Dietrich Kleinert
- Web page: https://patentgrep.com/patent/US10768147B2

## CPC

- G01N 29/2487: {Directing probes, e.g. angle probes (directing arrangements G01N29/221)}
- G01N 29/043: {in the interior, e.g. by shear waves}
- G01N 29/069: {Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique}
- G01N 29/262: {by electronic orientation or focusing, e.g. with phased arrays (phased arrays per se G10K11/34)}
- G01N 29/28: providing acoustic coupling {, e.g. water (impedance matching G10K11/02)}
- G01N 29/4463: {Signal correction, e.g. distance amplitude correction [DAC], distance gain size [DGS], noise filtering}
- G01N 2291/106: one or more transducer arrays
- G01N 2291/2634: cylindrical from outside
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

An ultrasonic detection assembly for detecting a characteristic in a test object having a cylindrical peripheral surface. The ultrasonic detection assembly includes a phased array probe positioned in proximity to the cylindrical peripheral surface of the test object. The phased array probe includes a plurality of adjacent transducer elements. Each transducer is operatively configured to emit a respective beam into the test object so as to provide a pattern of constructive interference. The ultrasonic detection assembly is structurally configured to provide for cylindrical contact between the phased array probe and the cylindrical peripheral surface of the test object. The ultrasonic detection assembly includes a controller operatively connected to the phased array probe for causing each transducer to emit the respective beam into the test object.

## Claims

### Claim 1

An ultrasonic detection assembly for detecting a characteristic in a test object having a cylindrical peripheral surface, the ultrasonic detection assembly comprising:
a phased array probe configured to be positioned in proximity to the cylindrical peripheral surface of the test object, the phased array probe including a plurality of transducer elements extending linearly across a distal end of the phased array probe and forming a circular inspection surface of the phased array probe, each transducer element of the plurality of transducer elements being laterally spaced apart and separated from adjacent transducer elements by a gap formed within the inspection surface, wherein at least one of the plurality of transducer elements extend in a linear manner fully across the circular inspection surface, wherein each transducer element is operatively configured to emit a respective beam into the test object in a time-delayed manner relative to an adjacent transducer element so as to provide a pattern of constructive interference;
a beam adjustment structure for providing cylindrical contact between the phased array probe and the cylindrical peripheral surface of the test object, the beam adjustment structure directly coupled to the inspection surface of the phased array probe; and
a controller operatively connected to the phased array probe for causing each transducer to emit the respective beam into the test object.

### Claim 2 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the beam adjustment structure includes a surface that matches the cylindrical peripheral surface of the test object.

### Claim 3 (depends on 2)

The ultrasonic detection assembly of claim 2, wherein the surface of the beam adjustment structure that matches the cylindrical peripheral surface of the test object is a cylindrical surface.

### Claim 4 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the pattern of constructive interference is provided as a single, rotationally symmetric sound beam emitted into the test object, and the phased array probe is configured to provide for a rotational symmetry that exists over a complete steering range of the phased array probe.

### Claim 5 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the phased array probe and the controller operatively connected thereto are configured such that the phased array probe is non-movably positioned in proximity to the peripheral surface of the test object as the sound beam is moved within the test object.

### Claim 6 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the plurality of transducer elements extending linearly across the distal end of the phased array probe are configured to generate and transmit the sound beam, the sound beam being movable along a two dimensional direction within the test object responsive to control from the controller.

### Claim 7 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the controller is operatively connected to the phased array probe via a wireless connection.

### Claim 8 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the controller includes a user interface provided on a display of the controller.

### Claim 9 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the phased array probe is an elongate, cylindrically shaped probe.

### Claim 10 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the respective beam emitted into the test object is emitted at an angle between about +24 degrees and −24 degrees with respect to a perpendicular axis extending through a center of the circular inspection surface.

### Claim 11 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the beam adjustment structure has a concave second surface matching a curvature of the cylindrical peripheral surface of the test object.

### Claim 12 (depends on 1)

The ultrasonic detection assembly of claim 1, wherein the beam adjustment structure is formed from an acrylic material.