Radiation dose detection system and method based on glass browning

Abstract

The invention discloses a radiation dose detection system and method based on glass browning, and mainly solves the technical problems of high detection cost, complex structure and the like of an existing detector. The detection system comprises a light source, glass, an image sensor and a signal processing module, the glass is browned in an irradiation environment; the optical axis of the light source is vertical to the glass surface and passes through the center of the glass; the image sensor is mounted on one side of the glass away from the light source and used for acquiring light source images through the glass; the signal processing module is connected with the image sensor and used for receiving the light source image transmitted by the image sensor and calculating and outputting parameter information of the irradiation environment, and the detection system is simple in overall structure and low in detection cost. Meanwhile, the invention further discloses a detection method based on the detection system, and the method is convenient to operate and high in detection precision and accuracy.

Description

Technical Field

[0001] The invention relates to a radiation dose detection method, and in particular to a radiation dose detection system and method based on glass browning. Background Art

[0002] Radiation dose refers to the radiation energy absorbed by a unit mass of matter, which is used to measure the degree of effect of ionizing radiation on matter. In the field of ionizing radiation applications, radiation dose is a key parameter and involves various effects produced by the interaction between radiation and matter. Therefore, it is particularly important to evaluate the total radiation dose of electronic equipment working in a nuclear radiation environment, such as nuclear emergency robots and surveillance cameras.

[0003] At present, scintillation detectors and gas ionization chamber detectors are commonly used to detect the total radiation dose. Among them, scintillation detectors are the most widely used radiation detectors, which use the flashes produced by ionizing radiation in certain substances to detect radiation doses. This type of detector has high sensitivity, but requires expensive photomultiplier tubes (PMTs) for signal reading, so the detection cost is high.

[0004] A gas ionization detector is a radiation detector that uses gas as the detection medium. It ionizes the working gas in the detector through the radiation in the radiation environment and collects the generated charge to achieve the purpose of recording the radiation. However, the internal structure of this type of detector is relatively complex and the overall volume is relatively large, which limits the places of use. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems of existing detectors such as high detection cost, complex structure, large overall volume, and limited use places, and to provide a radiation dose detection system and method based on glass browning.

[0006] To achieve the above objectives, the technical solutions provided by the present invention are:

[0007] A radiation dose detection system based on glass browning, used in radiation environment, its special features are:

[0008] Including light source, glass, image sensor and signal processing module;

[0009] The glass is transparent glass with both sides being flat and will turn brown under irradiation; the optical axis of the light source is perpendicular to the glass surface and passes through the center of the glass;

[0010] The image sensor is installed on the side of the glass away from the light source, and is used to collect the light source image through the glass;

[0011] The signal processing module is connected to the image sensor, and is used to receive the light source image transmitted by the image sensor, and calculate and output parameter information of the irradiation environment according to the brightness change of the light source image before and after irradiation.

[0012] Furthermore, it also includes a display module and a storage module respectively connected to the signal processing module, and is used for real-time display and storage of parameter information output by the signal processing module.

[0013] Furthermore, the signal processing module is an image processing chip.

[0014] Furthermore, it also includes a power supply module connected to the light source and the signal processing module respectively.

[0015] At the same time, the present invention also provides a radiation dose detection method based on glass browning, comprising the following steps:

[0016] Step【1】System initial calibration

[0017] 1.1. Assemble the above-mentioned radiation dose detection system based on glass browning and place it in a non-irradiation environment;

[0018] 1.2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module;

[0019] 1.3. The signal processing module extracts the current brightness value of the light source from the light source image and uses it as the initial brightness value, thereby completing the initial calibration of the system;

[0020] Step【2】System calibration

[0021] 2.1. Place the glass browning-based radiation dose detection system assembled in step 1.1 in an irradiation environment with a known total radiation dose;

[0022] 2.2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module;

[0023] 2.3. Change the total radiation dose of the irradiation environment, collect light source images under different total radiation doses according to the method in step 2.2, and transmit them to the signal processing module;

[0024] 2.4. Extracting brightness values ​​corresponding to the light source images under different total radiation doses from the light source images obtained in step 2.2 and step 2.3 through the signal processing module;

[0025] 2.5. Combining the brightness value obtained in step 2.4 and the initial brightness value obtained in step 1.3, a model function is fitted to complete the system calibration;

[0026] Step【3】Calibrate before use

[0027] Replace the glass in the radiation dose detection system based on glass browning assembled in step 2.1, and complete the calibration of the system before use in accordance with steps 1.1 to 1.3; wherein the parameters of the replaced glass are consistent with those of the glass before replacement;

[0028] Step【4】Measurement

[0029] 4.1. Place the radiation dose detection system calibrated in step [3] in an unknown radiation environment;

[0030] 4.2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module;

[0031] 4.3. The current brightness value of the light source image is extracted through the signal processing module, and combined with the model function obtained in step 2.5, the total radiation dose of the unknown radiation environment is output, thereby completing the radiation dose detection based on glass browning.

[0032] Furthermore, step [4] also includes: 4.5, calculating the radiation dose rate of the unknown radiation environment by combining the total radiation dose obtained in step 4.3 at fixed intervals.

[0033] Furthermore, in step 1.3 and step 2.4, the method for the signal processing module to extract the brightness value is specifically as follows:

[0034] The signal processing module converts the received light source image into a grayscale image, and traverses each pixel in the grayscale image to obtain the grayscale value corresponding to each pixel, then accumulates each grayscale value, and then combines the total number of pixels in the grayscale image to calculate the average grayscale value of the grayscale image. The average grayscale value is the current brightness value of the corresponding light source image.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The radiation dose detection system based on glass browning provided by the present invention includes a light source, glass, an image sensor and a signal processing module. The overall structure is simple. Based on the color change of glass under irradiation, the image of the light source is collected through the glass by the image sensor, and then the brightness change of the light source image is extracted by the signal processing module. The total radiation dose and dose rate of the radiation field can be obtained based on the brightness change. The overall structure of the detection system is simple and the detection cost is low.

[0037] 2. The radiation dose detection system based on glass browning provided by the present invention also includes a display module and a storage module, wherein the display module can display the detection information in real time, thereby improving the visualization of the system; the storage module can store the detected information in a timely manner for later analysis and use.

[0038] 3. The radiation dose detection method based on glass browning provided by the present invention is simple to operate and has high detection precision and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of an embodiment of a radiation dose detection system based on glass browning of the present invention.

[0040] Figure 2 The figure is a flow chart of the actual use of the radiation dose detection method based on glass browning of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention.

[0042] like Figure 1 As shown, this embodiment provides a radiation dose detection system based on glass browning, including a light source, glass, an image sensor and a signal processing module. Since the detection system is used in a radiation environment, except for the glass, the remaining components need to be treated with radiation protection to ensure their stability in the irradiated environment.

[0043] This embodiment uses a gamma radiation environment as an example for explanation. It has been found through research that conventional glass will turn brown in color as the total radiation dose increases in a gamma radiation environment, resulting in a decrease in its light transmittance. Based on this, this embodiment uses the characteristics of glass browning to perform low-cost radiation dose detection of the total radiation dose and dose rate of the radiation field.

[0044] The glass is a transparent glass with both sides being flat, and is used to cause browning under irradiation. The optical axis of the light source is perpendicular to the glass surface and passes through the center of the glass. In this embodiment, glass is selected for easy replacement, so the cost of detection is relatively low.

[0045] The image sensor is installed on the side of the glass away from the light source, and is used to continuously capture the light source image through the glass. In this embodiment, the resolution of the image sensor is 1920x1080.

[0046] The signal processing module is connected to the image sensor and is used to receive the light source image transmitted by the image sensor and calculate and output parameter information of the irradiation environment, which generally includes the total radiation dose and the radiation dose rate. The signal processing module is an image processing chip, and the corresponding model of processing chip can be selected as needed.

[0047] This embodiment also includes a display module and a storage module respectively connected to the signal processing module, the display module is used to display the parameter information output by the signal processing module in real time, so that the operator can observe the detection process in real time. The storage module is used to store the parameter information output by the signal processing module in time, so as to facilitate the later analysis and use.

[0048] This embodiment also includes a power supply module connected to the light source and the signal processing module respectively, so as to improve the stability of the system operation.

[0049] Combination Figure 2 As shown, this embodiment also provides a radiation dose detection method based on glass browning, comprising the following steps:

[0050] Step【1】System initial calibration

[0051] 1.1. Assemble the above-mentioned radiation dose detection system based on glass browning and place it in a non-irradiation environment.

[0052] 1.2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module.

[0053] 1.3. The signal processing module extracts the current brightness value of the light source from the light source image and uses it as the initial brightness value, thereby completing the initial calibration of the system and providing reference information for the calibration of the detection system.

[0054] In this embodiment, the method for the signal processing module to extract the brightness value is specifically as follows: the signal processing module converts the received light source image into a grayscale image, and traverses each pixel in the grayscale image to obtain the grayscale value corresponding to each pixel, and then accumulates each grayscale value to obtain the grayscale sum, and then combines the total number of pixels of the grayscale image, divides the grayscale value sum by the total number of pixels, and calculates the average grayscale value of the grayscale image. The average grayscale value is the brightness value of the corresponding light source image.

[0055] Step【2】System calibration

[0056] 2.1. Place the glass browning-based radiation dose detection system assembled in step 1.1 in an irradiation environment with a known total radiation dose.

[0057] 2.2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module.

[0058] 2.3. Change the total radiation dose of the irradiation environment, collect light source images under different total radiation doses according to the method in step 2.2, and transmit them to the signal processing module.

[0059] 2.4. The signal processing module extracts the brightness values ​​corresponding to the light source images under different total radiation doses from the light source images obtained in step 2.2 and step 2.3. The extraction method is the same as step 1.3 and will not be repeated here. As the total radiation dose increases, the degree of glass browning becomes more and more serious, and the brightness value corresponding to the light source image will continue to decrease.

[0060] 2.5. Combine the brightness value obtained in step 2.4 and the initial brightness value obtained in step 1.3 to fit the model function, thereby completing the calibration of the system.

[0061] The model function obtained by fitting in this embodiment is f(x)=0.1056x 2 +0.7792x+0.7585, x represents the change of the current average grayscale value relative to the initial grayscale value, that is, the change of the current brightness value relative to the initial brightness value. Based on this model function, the total radiation dose value of the radiation field to be measured can be output by inputting the corresponding brightness value change.

[0062] Step【3】Calibrate before use

[0063] Since the glass used for calibration in step [2] has browned, in order to ensure detection accuracy, before formal use, the glass in the radiation dose detection system based on glass browning assembled in step 2.1 needs to be replaced, and the system needs to be calibrated before use in accordance with steps 1.1 to 1.3; the parameters of the replaced glass are consistent with those of the glass before replacement.

[0064] Step【4】Measurement

[0065] 4.1. Place the radiation dose detection system calibrated in step [3] in an unknown radiation environment.

[0066] 4.2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module.

[0067] 4.3. The current brightness value of the light source image is extracted through the signal processing module, and the total radiation dose of the unknown radiation environment is output based on the model function fitted in step 2.5. Thus, the radiation dose detection based on glass browning is completed. 4.4. The radiation dose rate of the unknown radiation environment is calculated by combining the total radiation dose obtained in step 4.3 at fixed intervals, thereby completing the radiation dose detection based on glass browning.

[0068] Of course, corresponding radiation field parameters can be further calculated based on the above total radiation dose and radiation dose rate values.

[0069] Afterwards, the above-mentioned total radiation dose and radiation dose rate information can be transmitted to the corresponding display module and / or storage module through the serial port for display and / or storage.

[0070] The detection method of this embodiment is easy to operate, and the total radiation dose detected based on this method has high accuracy and precision.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present invention.

Claims

1. A radiation dose detection system based on glass browning, characterized in that: Including light source, glass, image sensor and signal processing module; The glass is a transparent glass with both sides being flat and is used for browning under irradiation environment; The optical axis of the light source is perpendicular to the glass surface and passes through the center of the glass; The image sensor is installed on the side of the glass away from the light source, and is used to collect the light source image through the glass; The signal processing module is connected to the image sensor, and is used to receive the light source image transmitted by the image sensor, and calculate and output parameter information of the irradiation environment according to the brightness change of the light source image before and after irradiation.

2. The radiation dose detection system based on glass browning according to claim 1, characterized in that: It also includes a display module and a storage module respectively connected to the signal processing module, and is used for real-time display and storage of parameter information output by the signal processing module.

3. The radiation dose detection system based on glass browning according to claim 1, characterized in that: The signal processing module is an image processing chip.

4. The radiation dose detection system based on glass browning according to claim 1, characterized in that: It also includes a power supply module connected to the light source and the signal processing module respectively.

5. A radiation dose detection method based on glass browning, characterized in that: The following steps are involved: Step【1】System initial calibration 1.

1. Assemble the radiation dose detection system based on glass browning according to any one of claims 1 to 4 and place it in a non-irradiation environment; 1.

2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module; 1.

3. The signal processing module extracts the current brightness value of the light source from the light source image and uses it as the initial brightness value, thereby completing the initial calibration of the system; Step【2】System calibration 2.

1. Place the glass browning-based radiation dose detection system assembled in step 1.1 in an irradiation environment with a known total radiation dose; 2.

2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module; 2.

3. Change the total radiation dose of the irradiation environment, collect light source images under different total radiation doses according to the method in step 2.2, and transmit them to the signal processing module; 2.

4. Extracting brightness values ​​corresponding to the light source images under different total radiation doses from the light source images obtained in step 2.2 and step 2.3 through the signal processing module; 2.

5. Combining the brightness value obtained in step 2.4 and the initial brightness value obtained in step 1.3, a model function is fitted to complete the system calibration; Step【3】Calibration before use Replace the glass in the radiation dose detection system based on glass browning assembled in step 2.1, and complete the calibration of the system before use in accordance with steps 1.1 to 1.3; wherein the parameters of the replaced glass are consistent with those of the glass before replacement; Step【4】Measurement 4.

1. Place the radiation dose detection system calibrated in step [3] in an unknown radiation environment; 4.

2. Start the light source, collect the light source image through the glass through the image sensor, and transmit it to the signal processing module; 4.

3. The current brightness value of the light source image is extracted through the signal processing module, and combined with the model function obtained in step 2.5, the total radiation dose of the unknown radiation environment is output, thereby completing the radiation dose detection based on glass browning.

6. The radiation dose detection method based on glass browning according to claim 5, characterized in that: Step [4] also includes: 4.

4. Calculate the radiation dose rate of the unknown radiation environment by combining the total radiation dose obtained in step 4.3 at fixed intervals.

7. The radiation dose detection method based on glass browning according to claim 5 or 6, characterized in that: In step 1.3 and step 2.4, the method for the signal processing module to extract the brightness value is specifically as follows: The signal processing module converts the received light source image into a grayscale image, and traverses each pixel in the grayscale image to obtain the grayscale value corresponding to each pixel, then accumulates each grayscale value, and then combines the total number of pixels in the grayscale image to calculate the average grayscale value of the grayscale image. The average grayscale value is the brightness value of the corresponding light source image.

Images