Leak-tight heat exchanger integrity inspection using tracer material

Patent metadata

Field	Value
Publication number	US-2021016396-A1
Application number	US-201916515214-A
Country	US
Kind code	A1
Filing date	Jul 18, 2019
Priority date	Jul 18, 2019
Publication date	Jan 21, 2021
Grant date	—

Abstract

An inspection system is configured to inspect the condition of a braze joint formed within a structure, wherein the braze joint is formed from a braze filler material having a tracer material disposed therein. The inspection system includes an energy source for directing energy towards the structure, an energy detector for detecting information regarding the structure following interaction with the energy directed from the energy source, and a data analysis system for analyzing the information detected by the energy detector. The data analysis system is configured to distinguish the tracer material from the remaining materials forming the structure in order to determine a suitability of the braze joint.

First claim

What is claimed is:

1 . An inspection system comprising:
an energy detector configured to detect a presence of a tracer material in a structure; a data analysis system in signal communication with the energy detector, the data analysis system configured to receive data regarding detection of the presence of the tracer material in the structure; and an energy source configured to direct energy towards the structure being tested.

2 . The inspection system of claim 1 , wherein the data analysis system is configured to perform spectral analysis regarding the data received from the energy detector.

3 . The inspection system of claim 2 , wherein the data analysis system determines a tested spectra regarding the structure being tested using the data received from the energy detector and compares the tested spectra to a reference spectra stored to a memory of the data analysis system.

4 . The inspection system of claim 3 , wherein the reference spectra corresponds to a spectra of the structure when the tracer material is positioned in a desired configuration relative to the structure, and wherein the data analysis system generates a control signal indicative of an unsuitable braze joint when a threshold value of difference is reached when comparing the tested spectra to the reference spectra.

5 . The inspection system of claim 1 , wherein the energy source is a neutron generator.

6 . The inspection system of claim 1 , wherein the tracer material is disposed within a braze filler material used to couple two or more components forming the structure.

7 . The inspection system of claim 6 , wherein the tracer material is substantially evenly distributed throughout the braze filler material.

8 . The testing system of claim 6 , wherein the tracer material is not alloyed with the braze filler material.

9 . The testing system of claim 6 , wherein the tracer material is boron- 10 .

10 . A method of inspecting a braze joint within a structure, the method comprising the steps of:
disposing a tracer material in a braze filler material used to form the braze joint; and detecting a presence of the tracer material in a desired configuration in the braze joint to determine an integrity of the braze joint.

11 . The method of claim 10 , further comprising a step of directing energy towards the braze joint to interact with the tracer material.

12 . The method of claim 11 , wherein the energy is a stream of neutrons directed by a neutron generator.

13 . The method of claim 10 , further comprising a step of analyzing data accumulated during the detecting of the presence of the tracer material at the braze joint.

14 . The method of claim 13 , wherein the analyzing of the data includes performing spectral analysis regarding the data.

15 . The method of claim 14 , wherein the spectral analysis includes determining a tested spectra regarding the braze joint and comparing the tested spectra to a reference spectra.

16 . The method of claim 15 , wherein the reference spectra corresponds to a spectra of the braze joint when the tracer material is positioned in a desired configuration, and wherein a difference determined between the tested spectra and the reference spectra indicates that the tracer material is not positioned at the desired configuration.

17 . The method of claim 13 , wherein the analyzing of the data includes forming a radiographic image of the braze joint.

18 . The method of claim 10 , wherein the detecting of the presence of the tracer material occurs from each of two perpendicular arranged perspectives.

19 . The method of claim 18 , further comprising a step of mapping a shape of the tracer material three-dimensionally relative to the remainder of the structure.

20 . The method of claim 19 , further comprising a step of comparing the shape of the tracer material mapped three-dimensionally to a reference three-dimensional shape to determine the integrity of the braze joint.

Assignees

• Hanon Systems

Inventors

• Zhang Qiong
• Gara Luan
• Abate Guglielmo
• Shaner Craig

Classifications

• B23K31/12

  relating to investigating the properties, e.g. the weldability, of materials · CPC title

• B23K11/253

  the measured parameter being a displacement or a position · CPC title

• B23K31/003

  relating to controlling of welding distortion · CPC title

• B23K20/123

  Controlling or monitoring the welding process · CPC title

• B23K35/0222

  for use in soldering or brazing (B23K35/0205 takes precedence) · CPC title