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Triggering device, scanning system and triggering and scanning method for industrial computed tomography (CT)

A trigger device, industrial technology, applied in the direction of measuring devices, instruments, using wave/particle radiation, etc., can solve the problems of spatial resolution error of projection image data, inability to correct, uneven scanning process, etc., and achieve the effect of accurate reconstruction

Active Publication Date: 2011-11-09
GRANPECT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the stroke error of the mechanical motion system, the speed change during the start-stop process of the mechanical motion system, and the mechanical transmission error, the scanning process triggered by equal time intervals is not uniform, and the obtained projection image data will bring uncertainty during image reconstruction. Errors in the spatial resolution of , cannot be corrected for

Method used

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  • Triggering device, scanning system and triggering and scanning method for industrial computed tomography (CT)
  • Triggering device, scanning system and triggering and scanning method for industrial computed tomography (CT)
  • Triggering device, scanning system and triggering and scanning method for industrial computed tomography (CT)

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1, a trigger device for industrial CT, such as figure 1 shown, including:

[0052] A set of position sensors; at least one position sensor corresponding to the degree of freedom is installed on the transmission end of the degree of freedom to be moved during scanning;

[0053] A storage module, configured to store a set of trigger conditions; wherein, one of the trigger conditions is the output of all or part of the set of position sensors;

[0054] A control module, configured to compare all or part of the output of the group of position sensors with each trigger condition; start the enable module when the output matches at least one trigger condition;

[0055] Enable module, used to send a trigger signal on every boot.

[0056] In this embodiment, the transmission end refers to the component used in the last link of the transmission action; the degrees of freedom include translational degrees of freedom and rotational degrees of freedom.

[0057]If only ...

Embodiment 2

[0079] Embodiment 2, a trigger method for industrial CT, including:

[0080] Install a group of position sensors, at least one position sensor corresponding to the degree of freedom is installed on the transmission end of the degree of freedom to be moved during scanning;

[0081] Save a group of trigger conditions; wherein, one of the trigger conditions is the output of all or part of the group of position sensors;

[0082] The output of all or part of the group of position sensors is compared with each trigger condition; when the output matches at least one trigger condition, a trigger signal is generated.

[0083] In this embodiment, the transmission end refers to the component used in the last link of the transmission action; the degrees of freedom include translational degrees of freedom and rotational degrees of freedom.

[0084] In this embodiment, the step of generating a trigger signal specifically includes:

[0085] After waiting for a predetermined time, the trigg...

Embodiment 3

[0102] Embodiment 3, a scanning system of industrial CT, comprising:

[0103] a radiation source for generating radiation when a trigger signal is received;

[0104] A signal acquisition and processing device for obtaining and storing image information according to ray penetration attenuation when a trigger signal is received;

[0105] trigger device, including:

[0106] A set of position sensors; at least one position sensor corresponding to the degree of freedom is installed on the transmission end of the degree of freedom to be moved during scanning;

[0107] A storage module, configured to store a set of trigger conditions; wherein, one of the trigger conditions is the output of all or part of the set of position sensors;

[0108] A control module, configured to compare all or part of the output of the group of position sensors with each trigger condition; start the enable module when the output matches at least one trigger condition;

[0109] An enabling module, config...

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Abstract

The invention discloses a triggering device, a scanning system and a triggering and scanning method for industrial computed tomography (CT). The triggering device comprises a group of position sensors, a storage module, a control module and an enabling module, wherein at least one position sensor corresponding to the degree of freedom (DOF) is arranged at the transmission tail end of the moving DOF in scanning; the storage module is used for storing a group of triggering conditions, wherein one triggering condition is all or partial output quantity of the group of position sensors; the control module is used for comparing the all or partial output quantity in the group of position sensors wit the triggering conditions; when the output quantity is matched with at least one triggering condition, the enabling module is started; and the enabling module is used for sending a triggering signal during starting each time. Through the triggering device, the scanning process is not affected by the transmission error and the movement velocity of a mechanical device, and the accuracy of the rebuilt three-dimensional image is improved.

Description

technical field [0001] The invention relates to the field of industrial CT non-destructive testing, in particular to an industrial CT trigger device, a scanning system, and a triggering and scanning method. Background technique [0002] Industrial CT is the abbreviation of industrial computerized tomography. Compared with traditional tomographic imaging technology, industrial CT can obtain tomographic imaging of the inspected object in multiple degrees of freedom. In the scanning inspection of the same object, it is necessary to change the scanning method multiple times to obtain the three-dimensional projection image of the object under inspection. In this case, for the projection image data under various scanning methods, the position or Angle, in order to ensure that the three-dimensional image of the object is reconstructed. Considering the stroke error of the mechanical motion system, the speed change during the start-stop process of the mechanical motion system, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04G01B15/04
Inventor 龚光华薛涛任海东王涛
Owner GRANPECT