An Ultrasonic Automatic Inspection Method Considering Workpiece Clamping Error Correction

An error correction and automatic detection technology, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, measuring devices, etc. And the effect of improving efficiency, increasing ultrasonic energy, and improving defect detection ability

Active Publication Date: 2019-11-29
CHINA WEAPON SCI ACADEMY NINGBO BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the technical problem that the detection accuracy decreases due to the clamping error of the workpiece, the technical solution of the present invention provides an ultrasonic C-scan path correction method considering the clamping error of the workpiece, including the following steps:

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  • An Ultrasonic Automatic Inspection Method Considering Workpiece Clamping Error Correction
  • An Ultrasonic Automatic Inspection Method Considering Workpiece Clamping Error Correction
  • An Ultrasonic Automatic Inspection Method Considering Workpiece Clamping Error Correction

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0036] The hardware device adopted in this embodiment includes a 6-degree-of-freedom industrial robot, a robot controller, a water tank, a water circulation system, an independent turntable, a DC servo motor, a driver, an ultrasonic probe, a signal generator / receiver, an industrial computer (including a motion control card, a high-speed data acquisition card) and supporting cables, etc. During detection, the workpiece is placed vertically on the turntable driven by the servo motor at the bottom of the water tank, and is centered and clamped with a three-jaw chuck, and the turntable rotates at a specific speed. At the same time, the ultrasonic probe is clamped by an industrial robot and moves at a constant sp...

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Abstract

The invention discloses an ultrasonic automatic detection method capable of considering workpiece clamping error correction. Under the condition that a clamping error exists in the workpiece, an industrial robot carries an ultrasonic probe to perform C scanning detection route correction to realize clamping error compensation. The method particularly comprises the following steps: identifying the actual clamping error of the workpiece through a change rule of water sound distance along with time in the rotating process of the workpiece, calculating a route transformation matrix from a workpiece coordinate system to a world coordinate system, and performing route transformation calculation on a scanning target route under the workpiece coordinate system to obtain a moving route of a probe under the world coordinate system to obtain the corrected probe moving route.

Description

technical field [0001] The invention relates to an ultrasonic automatic detection method considering workpiece clamping error correction. Background technique [0002] Ultrasonic testing is an important branch of non-destructive testing, and digital, automated, and intelligent robotic ultrasonic testing technology can effectively solve many problems caused by manual testing. Robots have been widely used in testing work in the world. [0003] When performing ultrasonic scanning inspection on a rotary workpiece, the workpiece is usually clamped and rotated by the turntable, and the mechanical platform is used to carry the ultrasonic probe along the workpiece generatrix to complete the spiral scanning of the workpiece. During the detection process, the probe needs to be aligned with the normal direction of the workpiece at all times to ensure the vertical incidence of the sound beam. Since the three-jaw chuck has the advantages of convenient clamping and automatic centering, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/265
CPCG01N29/048G01N29/265G01N2291/023
Inventor 倪培君张荣繁李雄兵宋永锋史亦韦黄远添付英东
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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