Automatic exposure controlling device and controlling method for digital photography

A technology of automatic exposure and digital photography, applied in medical science, equipment for radiological diagnosis, diagnosis, etc., can solve the problems of low response sensitivity, easy to be interfered by the external environment, not easy to automate, etc., to achieve high response sensitivity, Effects that are not easily disturbed

Active Publication Date: 2013-01-02
SHANGHAI IRAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a digital photography automatic exposure control device and control method, which is used to solve the problem th...

Method used

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  • Automatic exposure controlling device and controlling method for digital photography
  • Automatic exposure controlling device and controlling method for digital photography
  • Automatic exposure controlling device and controlling method for digital photography

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Embodiment 1

[0045] Such as Figure 1~Figure 5 As shown, the present embodiment provides an automatic exposure control device for digital photography, and the automatic exposure control device for digital photography at least includes:

[0046]AEC sensor 101 for converting X-rays into visible light and converting the visible light into charge signals;

[0047] The analog module 102 has three analog channels connected to the AEC sensor 101, the analog channels are used to convert the charge signal input by the AEC sensor 101 into a voltage signal, and amplify and filter the voltage signal;

[0048] The analog-to-digital conversion module 103, connected to the analog module 102, has three analog-to-digital conversion channels corresponding to the three analog channels, and the analog-to-digital conversion channels are used to convert the voltage signal output by the corresponding analog channel to Digital signal;

[0049] The processing module 104 is connected to the analog-to-digital conv...

Embodiment 2

[0061] Such as Figure 1~6 As shown, the present embodiment provides a control method of a digital photography automatic exposure control device, and the control method includes the following steps:

[0062] Such as Figure 6 As shown, step 1) S1 is first performed, and the system initialization of the processing module 104 includes: setting of the system clock, delay initialization and initialization of the working timing function of the analog-to-digital conversion module 103;

[0063] Then proceed to step 2) S2, the processing module 104 sends a control signal to sequentially select the first analog channel, the second analog channel and the third analog channel, and each of the analog channels sequentially converts the charge signal generated by the AEC sensor 101 into a voltage signal, and it is amplified and filtered, and then the analog-to-digital conversion is performed on the voltage signal by the analog-to-digital conversion module 103 to obtain a digital signal, an...

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Abstract

The invention provides an automatic exposure controlling device and an automatic exposure controlling method for digital photography. The method comprises the following steps that an automobile emission control (AEC) sensor converts a received X ray into visible light, generates an electric charge signal, and transmits the electric charge signal to an integrator on an analog module by an interface; the integrator converts the electric charge signal into a voltage signal,amplifies and filters, and outputs the voltage signal to an analogue-digital conversion (ADC) module; the ADC module transmits the converted digital signal to a processing module (a microprocessor); the processing module performs digital filtering on the digital signal converted by the ADC module and compares the digital signal with the converted digital signal to select a maximum value; and finally, the processing module compares the maximum value with a preset value to determine whether a pulse signal is sent to an X-ray panel probe to sample. Compared with the traditional method, the automatic exposure controlling method has the advantages that a multistage amplifying and comparing module is eliminated, and the ADC module is added, so that the AEC is controlled in a digitalized mode; and the device is intelligentized and high in response sensitivity, and is difficultly interfered by the outside environment.

Description

technical field [0001] The invention relates to an automatic exposure control (AEC) technology, in particular to a digital photography automatic exposure control device and control method. Background technique [0002] In the process of medical X-ray photography, in order to ensure the quality of X-ray imaging while minimizing the radiation dose received by patients, controlling the start and end of X-ray exposure is a very critical technology. With the continuous development of science and technology, we strive to produce the best and best images with the smallest possible radiation dose, and automatic exposure control emerges at the historic moment due to its own advantages. Automatic exposure control (Automatic Exposure Control AEC) equipment is a device that controls the X-ray exposure time. Its function is to precisely control the X-ray exposure time under the premise of ensuring the quality of the X-ray image, so as to minimize the X-ray dose absorbed by the patient. ...

Claims

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Application Information

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IPC IPC(8): A61B6/00
Inventor 冯化纲张经业
Owner SHANGHAI IRAY TECH
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