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Automatic exposure control method and system

A technology of automatic exposure and control method, applied in the parts of TV system, TV, color TV and other directions, can solve the problems of exposure radiation field and difficult control of exposure dose, and achieve accurate exposure radiation field. , The effect of shortening the sampling cycle and convenient operation

Active Publication Date: 2021-04-30
SHANGHAI IRAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an automatic exposure control method and system for solving the problems in the prior art that the exposure radiation field and the exposure dose are difficult to control in industrial inspection

Method used

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  • Automatic exposure control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 As shown, this embodiment provides an automatic exposure control method, and the automatic exposure control method includes:

[0048] 1) Turn on the flat panel detector, and set the parameters of the flat panel detector.

[0049]Specifically, first place the flat panel detector in the detection system and electrically connect it with other devices in the detection system. The detection system includes but not limited to DR (Digital Radiography, direct digital X-ray), CT (computed tomography, electronic Computed tomography) and security inspection machines, any system that uses flat panel detectors for image acquisition is applicable.

[0050] Specifically, the flat panel detector is turned on, and the parameters of the flat panel detector are set. The set parameters include but not limited to the exposure dose threshold and other parameters to ensure the normal operation of the flat panel detector, which are not limited to this embodiment. Step 2) aft...

Embodiment 2

[0065] Such as figure 2 As shown, this embodiment provides an automatic exposure control method. The difference from Embodiment 1 is that the automatic exposure control method detects the exposure by scanning the exposure dose of the exposure radiation field area of ​​the flat panel detector. Start time, and control the exposure dose of the first image acquisition (for determining the exposure radiation field) by predicting the exposure dose at the end of the image acquisition, including the following steps:

[0066] 1) Turn on the flat panel detector, and set the parameters of the flat panel detector.

[0067] For the specific method, refer to Embodiment 1, which will not be repeated here.

[0068] 2) Real-time detection of the exposure start time, the exposure dose is detected after the exposure starts and the exposure dose at the end of the exposure is predicted. If the exposure dose at the end of the exposure is predicted to reach the first exposure dose threshold, the e...

Embodiment 3

[0077] Such as Figure 3 ~ Figure 5As shown, this embodiment provides an automatic exposure control system 1. In this embodiment, the automatic exposure control system 1 is used to implement the automatic exposure control method described in Embodiments 1-2. The automatic exposure control system 1 includes:

[0078] A flat panel detector 11 , a high voltage controller 12 , a high voltage generating device 13 and a ball tube 14 .

[0079] Such as image 3 As shown, the flat panel detector 11 implements automatic exposure control and automatically collects images.

[0080] Specifically, as Figure 4 As shown, the flat panel detector 11 includes a detection panel 111, an exposure radiation field calculation module 112 and an automatic exposure control module 113; the detection panel 111 detects X-rays and converts them into electrical signals; the exposure radiation The field calculation module 112 is connected to the output terminal of the detection panel 111, and determines...

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Abstract

The invention provides an automatic exposure control method and system. The automatic exposure control method comprises the following steps of: turning on a flat panel detector and setting parameters; detecting exposure starting time in real time, detecting exposure dose or exposure time after exposure is started, if the exposure dose reaches a first exposure dose threshold value or the exposure time reaches an exposure time threshold value, collecting an image, and determining an exposure irradiation field; opening an exposure window, and enabling the flat panel detector to enter an automatic exposure control mode and trigger a switching-off control signal; and detecting the exposure ending moment in real time, and triggering image acquisition by the flat panel detector after exposure is ended. According to the automatic exposure control method and the system, accurate control of exposure irradiation radiation field and exposure dose is realized, the structure is simple, the cost is low, the image acquisition period is short, and the operation complexity is low.

Description

technical field [0001] The invention relates to the field of flat panel detection, in particular to an automatic exposure control method and system. Background technique [0002] Flat panel detector is a new type of X-ray image detection technology that was born in the last century. It is famous for its fast imaging speed and high resolution. It is widely used in medical detection, non-destructive testing, security inspection, anti-terrorism and other fields. In the application of industrial inspection, the traditional film records the exposure radiation image, which is expensive and difficult to save. The application of digital flat panel detectors in industrial inspection has become the future development direction. [0003] In recent years, integrated intelligent automatic exposure detection has emerged as an emerging technology in the industry. In industrial inspection applications, due to the large size of the workpiece device and high absorption rate of X-rays, long-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/235H04N5/32
CPCH04N5/32H04N23/61H04N23/73
Inventor 黄翌敏何承林
Owner SHANGHAI IRAY TECH
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