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Determination method of total focal law before ultrasonic phased array probe flaw detection

An ultrasonic phased array and law technology, which is used in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and measuring devices, etc., can solve the problem that the method for determining the total focal law is not retrieved, etc. Achieving the effect of high signal-to-noise ratio detection

Active Publication Date: 2015-12-02
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] No public literature on the determination method of total focal law before ultrasonic phased array probe flaw detection was retrieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Using the method described in this patent, before performing ultrasonic flaw detection on high-temperature alloy parts, set the general focusing law of the ultrasonic phased array probe, and use a ring array ultrasonic phased array probe, an ultrasonic phased array Water tank, a control computer and 14 superalloy comparison test blocks with artificial defects, the diameter of artificial defects is 0.4mm, the specific operation steps are as follows:

[0045] 1. Instrument connection and preparation: Connect the cable of the ring array ultrasonic phased array probe to the corresponding interface on the ultrasonic phased array flaw detector, and immerse all the comparison test blocks according to the order of the depth of the defect, with the hole bottom facing down In the flaw detection water tank, keep the upper surface of the comparison test block horizontal, install the circular array ultrasonic phased array probe on the flaw detection fixture, connect the ultrasonic ph...

Embodiment 2

[0063] Using the method described in this patent, before performing ultrasonic flaw detection on aluminum alloy parts, set the general focusing law of the ultrasonic phased array probe, and use a ring array ultrasonic phased array probe, an ultrasonic phased array flaw detector, and a flaw detector Water tank, a control computer and 14 aluminum alloy material comparison test blocks with artificial defects, the diameter of artificial defects is 0.8mm, the specific operation steps are as follows:

[0064] 1. Instrument connection and preparation;

[0065] 2. Set the sub-focusing law by controlling the computer:

[0066] 2.1. Partition the comparison test block;

[0067] 2.2. Complete the sub-focusing law setting of each partition:

[0068] 2.2.1. Set the number of wafers used by each partition;

[0069] 2.2.2. Set the pulse emission focus form and focus depth of each partition;

[0070] 2.2.3. Set the pulse receiving focus form and focus depth of each zone;

[0071] 3. Dete...

Embodiment 3

[0076] Using the method described in this patent, before performing ultrasonic flaw detection on titanium alloy parts, the general focusing law of the ultrasonic phased array probe is set, and a ring array ultrasonic phased array probe, an ultrasonic phased array flaw detector, and a flaw detector Water tank, a control computer and 14 comparison test blocks of titanium alloy material with artificial defects, the diameter of artificial defects is 0.8mm, the specific operation steps are as follows:

[0077] 1. Instrument connection and preparation;

[0078] 2. Set the sub-focusing law by controlling the computer:

[0079] 2.1. Partition the comparison test block;

[0080] 2.2. Complete the sub-focusing law setting of each partition:

[0081] 2.2.1. Set the number of wafers used by each partition;

[0082] 2.2.2. Set the pulse emission focus form and focus depth of each partition;

[0083] 2.2.3. Set the pulse receiving focus form and focus depth of each zone;

[0084] 3. Dete...

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Abstract

The invention belongs to the technical field of lossless detection, and relates to a total focusing rule determination method before flaw detection by an ultrasonic phased array probe, used for high-flexibility flaw detection of high-thickness detected parts. The total focusing rule determination method comprises the following steps of connecting instruments and preparing; setting division focusing rules through a control computer; determining a gain value of each division zone; and forming a total focusing rule by the division focusing rules and the gain values of 7 division zones. According to the invention, high-flexibility flaw detection is carried out on the high-thickness parts by utilizing the ultrasonic phased array probe, and high signal to noise ratio of detecting micro defects in the detected parts is achieved.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and relates to a method for determining the total focal law before flaw detection of an ultrasonic phased array probe used for high-sensitivity flaw detection of large-thickness tested parts. Background technique [0002] Phased array technology is a new type of ultrasonic testing technology. This technology uses multiple chips, and uses electronic technology to change the focal position of the sound beam to replace multiple common probes with different focal lengths, and combines with partition scanning methods to improve the one-time detection ability, detection accuracy and detection efficiency of the ultrasonic beam. The design of ultrasonic phased array probes is based on Huygens' principle. The transducer is composed of multiple independent piezoelectric wafers, and each wafer is called a unit. According to certain rules and timing, the electronic system is used to control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/26
Inventor 沙正骁梁菁史亦韦王铮高祥熙
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS