Radiation dose measuring device and method

Abstract

The application discloses a radiation dose measuring device and method, the device comprises a foil, an ultrasonic pulse receiver and a signal collector, a liquid transmission medium is filled between the foil and the ultrasonic pulse receiver; the foil is used for receiving radiation, generating ultrasonic waves, and the sound waves are transmitted to the ultrasonic pulse receiver through the liquid transmission medium; the ultrasonic pulse receiver is used for detecting ultrasonic waves, transmitting the detected waveforms to the signal collector, the signal collector is used for reading the amplitude of the sound waves, and the amplitude is converted into the radiation dose according to the relationship between the amplitude and the radiation dose. The device and method disclosed by the application can realize real-time measurement of the radiation dose, especially high dose rate.

Description

Technical Field

[0001] This invention relates to a radiation dose measurement device and method, and more particularly to a high dose rate radiation dose measurement device and method, belonging to the field of nuclear radiation detection technology. Background Technology

[0002] High dose rate radiation, characterized by high beam intensity, narrow pulse width, high instantaneous dose rate, and high power, has attracted widespread research attention across various fields. High dose rate radiation typically involves particles with energies ranging from 0.2 to 15 MeV, pulse widths from 10 to 400 ns, and instantaneous dose rates exceeding 10. 6 Gy / s is crucial for studying the effects of transient ionizing radiation, which requires precise, real-time dose monitoring in ultra-high dose rate environments.

[0003] However, existing online dosimetry protocols, such as the American Institute of Medical Physics TG-51 protocol and the International Atomic Energy Agency's TRS-398 protocol, are only suitable for standard dosimetry. At ultra-high dose rates, they are affected by dose rate dependence and saturation effects, making it impossible to obtain measurement results directly. Additional correction factors need to be introduced, which leads to complexity in measurement and calculation.

[0004] In addition, existing radiation-chromatic film (RCF) and thermoluminescent dosimeter (TLD) can be used for the determination of ultra-high dose rates, but these methods are not real-time and the dose reading method is relatively complicated.

[0005] Therefore, it is necessary to conduct in-depth research on radiation dose measurement methods to solve the problem that they cannot achieve real-time measurement of high dose rates. Summary of the Invention

[0006] To overcome the above problems, the inventors conducted in-depth research and designed a radiation dose measurement device, characterized in that it includes a foil 1, an ultrasonic pulse receiver 2 and a signal acquisition device 3, with a liquid transmission medium filling between the foil 1 and the ultrasonic pulse receiver 2.

[0007] The foil 1 is used to receive high dose rate radiation and generate ultrasonic waves, which are transmitted to the ultrasonic pulse receiver 2 through a liquid transmission medium.

[0008] The ultrasonic pulse receiver 2 is used to detect ultrasonic waves and transmit the detected waveform to the signal acquisition unit 3.

[0009] The signal acquisition unit 3 is used to read the amplitude of the sound wave and convert the amplitude into radiation dose according to the relationship between amplitude and radiation dose.

[0010] In a preferred embodiment, the selection factors for the foil include: its radiation blocking performance, Grünesian coefficient, acoustic impedance parameters of the material, and sound velocity of the material.

[0011] In a preferred embodiment, the foil 1 is lead foil.

[0012] In a preferred embodiment, the liquid transport medium is water.

[0013] In a preferred embodiment, the optimal distance between the foil and the ultrasonic pulse receiver is obtained by:

[0014]

[0015] Where r′ represents the spatial position of the ultrasonic pulse receiver surface, t represents the ultrasonic propagation time, SIR(r′,t) represents the ultrasonic spatial response per pulse received by the ultrasonic pulse receiver at time t and position r′, S represents the surface receiving area of ​​the ultrasonic pulse receiver, r represents the spatial position of the ultrasonic source, c represents the ultrasonic propagation speed, and δ represents the instantaneous ultrasonic excitation source.

[0016] In a preferred embodiment, the amplitude between the first peak and the next trough of the ultrasonic signal is used as the measurement signal.

[0017] In a preferred embodiment, the amplitude is calibrated twice to obtain a linear fitting curve of amplitude versus radiation dose.

[0018] In a preferred embodiment, the calibration is performed using a thermoluminescent dosimeter or a radiochromic film. The radiation is detected by the thermoluminescent dosimeter or the radiochromic film to obtain the true dose of the radiation and to calibrate the amplitude.

[0019] This invention also discloses a method for measuring radiation dose, comprising the following steps:

[0020] S1. Fill the space between the foil and the ultrasonic pulse receiver with a liquid transmission medium;

[0021] S2. A foil sheet is used to receive radiation and generate sound waves;

[0022] S3. Use an ultrasonic pulse receiver to receive ultrasonic waves, acquire ultrasonic signals, and use the amplitude between the first peak and the next trough of the ultrasonic signal as the measurement value.

[0023] S4. Based on the measured values, obtain the radiation dose according to the linear fitting curve of amplitude and radiation dose.

[0024] In a preferred embodiment, the linear fitting curve of the amplitude versus radiation dose is obtained by the following method:

[0025] The first test is conducted: any type of radiation is tested using a thermoluminescent dosimeter or a radiation-changing film to obtain the true dose of the radiation; the measured value of the radiation is obtained using the methods in S1 to S3.

[0026] A second test is conducted: a different dose of radiation is used, and the true dose of the radiation is obtained again using a thermoluminescent dosimeter or a radiation-changing film. The measured value of the radiation is obtained using the methods in S1 to S3.

[0027] Linear fitting is performed based on the actual dose and measured value obtained from the first test and the actual dose and measured value obtained from the second test to obtain a linear fitting curve of amplitude versus radiation dose.

[0028] The beneficial effects of this invention include:

[0029] (1) It can achieve online, rapid, and real-time measurement of high dose rate radiation dose and has a rapid response capability;

[0030] (2) The measurement results have high accuracy;

[0031] (3) The radiation dose and the sound pressure signal show a highly linear relationship, and the detection sensitivity is significantly improved;

[0032] (4) The measuring device has a simple structure, low cost, and strong stability;

[0033] (5) Based on acoustic signal detection, it is immune to electromagnetic interference and is particularly suitable for complex radiation environments. Attached Figure Description

[0034] Figure 1 A schematic diagram of a radiation dose measuring device according to a preferred embodiment of the present invention is shown.

[0035] Figure 2 A schematic diagram of an ultrasonic pulse receiver receiving a signal in a radiation dose measurement device according to a preferred embodiment of the present invention is shown.

[0036] Figure 3 A schematic diagram showing the measurement signal obtained by a radiation dose measuring device according to a preferred embodiment of the present invention is illustrated.

[0037] Figure 4 The measurement results obtained in Example 1 and the corresponding actual doses are shown.

[0038] Explanation of icon numbers:

[0039] 1-Foil;

[0040] 2-Ultrasonic pulse receiver;

[0041] 3-Signal Acquisition Unit;

[0042] 4-Thermoluminescent dosing film or radiation-sensitive film. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent.

[0044] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0045] According to the present invention, a radiation dose measuring device, particularly a high dose rate radiation dose measuring device, is provided, such as... Figure 1 As shown, it includes a foil 1, an ultrasonic pulse receiver 2, and a signal acquisition device 3, with a liquid transmission medium filling the space between the foil 1 and the ultrasonic pulse receiver 2.

[0046] According to the present invention, the foil 1 is used to receive radiation and generate ultrasonic waves, which are transmitted to the ultrasonic pulse receiver 2 through a liquid transmission medium.

[0047] The ultrasonic pulse receiver 2 is used to detect ultrasonic waves and transmit the detected waveform to the signal acquisition unit 3.

[0048] The signal acquisition unit 3 is used to read the amplitude of the sound wave and convert the amplitude into radiation dose according to the relationship between amplitude and radiation dose.

[0049] Existing online dosimetry methods generally utilize electron or ion detectors generated by radiation pulses irradiating materials to obtain the radiation dose. However, under high dose rate radiation, the extremely high dose rate leads to an extremely high ionization density. This ionization density causes electrons and ions to recombine, producing a saturation effect. Consequently, the linearity between the radiation dose and the detected particles is lost, especially at 10⁻⁶ ppm. 4 Linearity cannot be maintained at Gy / s.

[0050] In this invention, by irradiating a foil, energy is deposited within the foil by the radiation. This energy is converted into heat, causing the foil to thermally expand and generate ultrasonic waves. The radiation dose is measured by measuring the amplitude of these ultrasonic waves. Because the energy is converted twice—through heat and ultrasonic waves—the energy conversion efficiency is greatly reduced, solving the saturation effect problem. Furthermore, verification shows that the converted energy has extremely high linearity with the radiation pulse. Experiments have confirmed that the device in this invention achieves high performance within 10... 4 Gy / s ~ 1010 Dosage measurement can be effectively performed at all Gy / s.

[0051] According to the present invention, the foil 1 can be a metal foil, such as lead, tungsten, gold, silver, bismuth, etc., or an organic polymer foil, such as polytetrafluoroethylene foil, or an inorganic compound foil, such as NaI, Al2O3, etc.

[0052] Preferably, the selection factors for the foil include: its radiation blocking performance, Grünesian coefficient, acoustic impedance parameters of the material, and sound velocity of the material.

[0053] 1. X-ray blocking performance: Good blocking performance is necessary to generate a large energy density gradient at the contact point between the X-ray and the foil;

[0054] 2. Grünesian coefficient: This coefficient reflects the material's ability to convert energy density into sound pressure. Selecting a material with a higher Grünesian coefficient can increase sound pressure.

[0055] III. Acoustic impedance parameters of the material: Acoustic impedance Z = ρc, where ρ is the density of the material and c is the sound velocity of the material. The acoustic impedance Z of the material should be matched with the water to ensure that the sound pressure at the modulator can be transmitted normally into the water for detection.

[0056] IV. Sound velocity of materials: The sound velocity of materials should not be too high in order to ensure that the frequency of the radiated sound is low.

[0057] Preferably, the foil 1 is lead foil. Compared to other foils, lead foil can achieve better frequency modulation, resulting in better linearity of ultrasound and radiation. Furthermore, the pulsed rays incident on the lead foil form a large energy density deposition, creating a steep energy density gradient distribution at the lead foil-water interface, which can generate a strong initial sound pressure distribution. This initial pressure distribution corresponds to a wide distribution in the frequency domain of the pressure signal. Due to the structural differences between lead foil and water, their acoustic impedances differ significantly. When the sound wave signal propagates through the interface, most of the signal is reflected, with less transmission. Therefore, sound signals of various frequencies are reflected multiple times inside the lead foil. Signals that meet the resonance condition are amplified, while pressure waves of non-resonant frequencies cancel each other out during multiple reflections. Ultimately, only the wave of the resonant frequency can be received by the ultrasonic pulse receiver, thus providing clear and distinct peaks and troughs, such as... Figure 2 As shown.

[0058] In this invention, the size of the foil is not particularly limited, and those skilled in the art can freely set it according to actual needs. Preferably, the length and width of the lead foil are both set to 10-50 mm, and the thickness is set to 1-3 mm, for example, 40 mm * 40 mm * 2 mm. The length and width of the foil can affect the wavefront of the radiated ultrasonic signal. Selecting a foil with a length and width greater than its thickness results in a plane wave ultrasonic signal. The amplitude of the plane wave does not attenuate with the increase of the propagation distance, which is important for improving the sensitivity of the system.

[0059] Furthermore, the thickness of the foil affects measurement sensitivity. When the thickness is too low, the ultrasonic signal frequency increases; a thinner lead foil can lead to insufficient dose deposition, resulting in a weaker acoustic signal at a higher frequency. However, high-frequency signals are more prone to attenuation during propagation, making them difficult for ultrasonic sensors to detect. On the other hand, if the foil is too thick, the signal frequency decreases. While this may enhance signal strength, the longer propagation time of low-frequency signals reduces temporal resolution, especially during dynamic processes, where crucial timing information may be lost. In addition, low-frequency signals are more susceptible to background noise such as mechanical vibration or electromagnetic interference, thus reducing the signal-to-noise ratio and affecting detection accuracy.

[0060] According to the present invention, the liquid transport medium may be water, silicone oil, glycerin, or other liquids.

[0061] In a preferred embodiment, the liquid transmission medium is water, which has the weakest attenuation for ultrasonic signals, thus preserving the signal peak to the greatest extent and avoiding distortion.

[0062] When the testing environment is high temperature or corrosive, silicone oil or glycerin is preferred. Glycerin has high viscosity, is not easy to evaporate or leak, and is suitable for long-term experiments. Although its sound wave attenuation is slightly higher than that of water, which may lead to signal weakening in high-frequency experiments, it can still provide good acoustic matching. Silicone oil has a density and acoustic impedance close to that of water, is chemically stable, and is suitable for high temperature or corrosive environments. It has low volatility and is friendly to long-term experiments.

[0063] The ultrasonic pulse receiver can be any existing receiver capable of receiving ultrasonic waves, such as a non-focused immersion detector.

[0064] Preferably, the bandwidth f of the ultrasonic pulse receiver needs to satisfy:

[0065]

[0066] Where h represents the speed of sound in the foil, and d represents the thickness of the foil.

[0067] According to the present invention, when the acoustic signal propagates through the interface, most of the signal is reflected. Therefore, the acoustic signals of various frequencies are reflected multiple times inside the lead foil. The signal that meets the resonance condition will be enhanced. The pressure waves of the non-resonant frequency will cancel each other out during multiple reflections. Finally, only the wave of the resonant frequency can transmit a small portion into the liquid and be detected by the ultrasonic pulse receiver. Therefore, the bandwidth of the ultrasonic pulse receiver needs to match the frequency of the radiated acoustic signal to ensure detection accuracy.

[0068] The distance between the foil and the ultrasonic pulse receiver has a significant impact on signal acquisition. When the distance between the foil and the ultrasonic pulse receiver is too close, the geometric characteristics of the foil and the ultrasonic pulse receiver are mismatched, causing the wavefront to arrive at the detector surface at different times. The signal superposition will either enhance or destroy the original signal. When the distance between the foil and the ultrasonic pulse receiver is too far, although it will not affect the signal waveform, the measurement accuracy will be reduced because the ultrasonic signal will attenuate in water.

[0069] In a preferred embodiment, the optimal distance between the foil and the ultrasonic pulse receiver is obtained by:

[0070]

[0071] Where, r ′ The SIR(r) represents the spatial position of the ultrasonic pulse receiver surface, t represents the ultrasonic propagation time, and SIR(r) represents the time of ultrasonic wave propagation. ′ ,t) represents time t and position r ′ At point S, the ultrasonic pulse receiver receives the ultrasonic spatial response per pulse, where S represents the surface receiving area of ​​the ultrasonic pulse receiver, r represents the spatial position of the ultrasonic source, c represents the ultrasonic propagation speed, and δ represents the instantaneous ultrasonic excitation source.

[0072] Experiments show that, using the above distance and lead foil as the foil, the linear response between the signal amplitude intensity and radiation dose acquired by the ultrasonic pulse receiver can reach 0.999, and the measurement accuracy is extremely high.

[0073] In a preferred embodiment, a signal amplifier is further provided between the ultrasonic pulse receiver and the signal acquisition unit to increase the signal amplitude.

[0074] According to the present invention, the ultrasonic pulse receiver receives three signals: the first signal is electrical noise caused by the instantaneous electromagnetic pulse generated by radiation; the second signal is an ultrasonic signal; and the third signal is the ultrasonic signal that is reflected by the ultrasonic pulse receiver surface, then reflected by the foil, and then reaches the ultrasonic pulse receiver again.

[0075] In this invention, the amplitude of the ultrasonic signal is used as the measurement signal, that is, the second signal is used as the measurement signal.

[0076] Furthermore, the first, second, and third signals are separated in time, such as... Figure 2 As shown, the first signal is generated at time 0, the second signal is generated at time 18μs, and the third signal is generated at time 52μs. Therefore, it is easy to distinguish between the different signals.

[0077] Because ultrasonic signals undergo multiple reflections and transmissions between the ultrasonic pulse receiver and the cross-section of the liquid transmission medium, they form attenuated oscillating signals. According to this invention, the amplitude between the first peak and the next trough of the ultrasonic signal is used as the measurement signal, such as... Figure 3 As shown.

[0078] In a preferred embodiment, the signal acquisition device converts the amplitude into a voltage value, and uses the converted voltage value as a measurement signal for easy reading and calculation.

[0079] According to the present invention, there is a linear relationship between amplitude and radiation dose. Only two calibrations of the amplitude are required to obtain a linear fitting curve between amplitude and radiation dose. The measured amplitude can be converted into radiation dose based on the linear fitting curve.

[0080] In a preferred embodiment, the calibration is performed using a thermoluminescent dosimeter (TLD) or a radiochromic film (RCF). The radiation is detected by the thermoluminescent dosimeter or the radiochromic film 4 to obtain the true dose of the radiation and to calibrate the amplitude.

[0081] Radiation needs to be measured offline using thermoluminescent dosimeters or radiochromic films. In this invention, the method for detecting the true radiation dose using thermoluminescent dosimeters or radiochromic films will not be described in detail, and those skilled in the art can freely perform it based on experience.

[0082] This invention also discloses a radiation dose measurement method, particularly suitable for real-time measurement of high dose rate radiation dose, comprising the following steps:

[0083] S1. Fill the space between the foil and the ultrasonic pulse receiver with a liquid transmission medium;

[0084] S2. A foil sheet is used to receive radiation and generate sound waves;

[0085] S3. Use an ultrasonic pulse receiver to receive ultrasonic waves, acquire ultrasonic signals, and use the amplitude between the first peak and the next trough of the ultrasonic signal as the measurement value.

[0086] S4. Based on the measured values, obtain the radiation dose according to the linear fitting curve of amplitude and radiation dose.

[0087] Preferably, the linear fitting curve of the amplitude and radiation dose is obtained by the following method:

[0088] The first test is conducted: any type of radiation is tested using a thermoluminescent dosimeter or a radiation-changing film, preferably high dose rate radiation, to obtain the true dose of the radiation; the measured value of the radiation is obtained using the methods in S1 to S3.

[0089] A second test is conducted: a different dose of radiation is used, preferably a different dose of high dose rate radiation, and the true dose of the radiation is obtained again using a thermoluminescent dosimeter or a radiation-changing film. The measured value of the radiation is obtained using the methods in S1 to S3.

[0090] Linear fitting is performed based on the actual dose and measured value obtained from the first test and the actual dose and measured value obtained from the second test to obtain a linear fitting curve of amplitude versus radiation dose.

[0091] Example

[0092] Example 1

[0093] The following device was used for real-time radiation dose measurement:

[0094] It includes a foil 1, an ultrasonic pulse receiver 2, and a signal acquisition device 3, with a liquid transmission medium filling the space between the foil 1 and the ultrasonic pulse receiver 2;

[0095] The foil 1 is used to receive radiation and generate ultrasonic waves, which are transmitted to the ultrasonic pulse receiver 2 through a liquid transmission medium.

[0096] The ultrasonic pulse receiver 2 is used to detect ultrasonic waves and transmit the detected waveform to the signal acquisition unit 3.

[0097] The signal acquisition device is used to read the amplitude of the sound wave and convert the amplitude into radiation dose based on the relationship between amplitude and radiation dose.

[0098] The foil is lead foil with dimensions of 40mm*40mm*2mm. The liquid transmission medium is water. The signal acquisition device is a non-focusing water immersion detector V303-SU. The distance between the foil and the signal acquisition device is 2.5cm.

[0099] X-rays generated by a high-current pulsed electron beam accelerator are used as radiation for detection.

[0100] The testing process includes the following steps:

[0101] S1. Fill the space between the foil and the ultrasonic pulse receiver with a liquid transmission medium;

[0102] S2. A foil sheet is used to receive radiation and generate sound waves;

[0103] S3. Use an ultrasonic pulse receiver to receive ultrasonic waves, acquire ultrasonic signals, and use the amplitude between the first peak and the next trough of the ultrasonic signal as the measurement value.

[0104] S4. Based on the measured values, obtain the radiation dose according to the linear fitting curve of amplitude and radiation dose.

[0105] The linear fitting curve of amplitude versus radiation dose was obtained in the following way:

[0106] The first test is conducted: a thermoluminescent dosimeter is used to detect any high dose rate radiation to obtain the true dose of the high dose rate radiation; the measured value of the radiation is obtained using the methods in S1 to S3.

[0107] A second test was conducted: a different dose of high dose rate radiation was used, and the actual dose of the high dose rate radiation was obtained again using a thermoluminescent dosimeter. The measured value of the radiation was obtained using the methods in S1 to S3.

[0108] Linear fitting is performed based on the actual dose and measured value obtained from the first test and the actual dose and measured value obtained from the second test to obtain a linear fitting curve of amplitude versus radiation dose.

[0109] Furthermore, the signal acquisition device converts the amplitude into a voltage value, and uses the converted voltage value as a measurement signal.

[0110] The fitted curve obtained from the experiment is as follows Figure 4 As shown, the red dots represent the corresponding results of the first and second tests.

[0111] In the experiment, multiple different doses of X-rays were detected, and the actual dose was obtained using a thermoluminescent dosimeter. The results are as follows: Figure 4 As shown, the black squares represent the test results and their actual doses.

[0112] As can be seen from the figure, the method in this invention can obtain accurate detection results.

[0113] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this invention, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0114] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0115] The present invention has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present invention based on these embodiments, all of which fall within the scope of protection of the present invention.

Claims

1. A radiation dose measuring device, characterized in that, It includes a foil, an ultrasonic pulse receiver, and a signal acquisition device, with a liquid transmission medium filling the space between the foil and the ultrasonic pulse receiver; The foil is lead foil, used to receive radiation and generate ultrasonic waves, which are transmitted to the ultrasonic pulse receiver through a liquid transmission medium. The thickness of the foil is set at 1~3mm; The ultrasonic pulse receiver is used to detect ultrasonic waves and transmit the detected waveform to the signal acquisition unit. The signal acquisition device is used to read the amplitude of the sound wave and convert the amplitude into radiation dose according to the relationship between amplitude and radiation dose; The bandwidth of the ultrasonic pulse receiver The following conditions must be met: in, This indicates the speed of sound of ultrasound within the foil. This indicates the thickness of the foil.

2. The radiation dose measuring device according to claim 1, characterized in that, The selection factors for the foil include: its ability to block radiation, Coefficients, acoustic impedance parameters of the material, and sound velocity of the material.

3. The radiation dose measuring device according to claim 1, characterized in that, The liquid transport medium is water.

4. The radiation dose measuring device according to claim 1, characterized in that, The optimal distance between the foil and the ultrasonic pulse receiver is obtained by the following method: in, Indicates the spatial position of the ultrasonic pulse receiver surface. Indicates the time it takes for ultrasound to travel. Indicates time and location At that location, the ultrasonic spatial response received by the ultrasonic pulse receiver per pulse, This indicates the surface receiving area of ​​the ultrasonic pulse receiver. Indicates the spatial location of the ultrasound source. Indicates the speed of ultrasonic wave propagation. This refers to an instantaneous ultrasonic excitation source.

5. The radiation dose measuring device according to claim 1, characterized in that, The amplitude between the first peak and the next trough of the ultrasonic signal is used as the measurement signal.

6. The radiation dose measuring device according to claim 1, characterized in that, The amplitude was calibrated twice to obtain a linear fitting curve between amplitude and radiation dose.

7. The radiation dose measuring device according to claim 6, characterized in that, The calibration is performed using a thermoluminescent dosimeter or a radiochromic film. The radiation is detected using the thermoluminescent dosimeter or the radiochromic film to obtain the true dose of the radiation and to calibrate the amplitude.

8. A method for measuring radiation dose, using the radiation dose measuring device as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Fill the space between the foil and the ultrasonic pulse receiver with a liquid transmission medium; S2. A foil sheet is used to receive radiation and generate sound waves; S3. Use an ultrasonic pulse receiver to receive ultrasonic waves, acquire ultrasonic signals, and use the amplitude between the first peak and the next trough of the ultrasonic signal as the measurement value. S4. Based on the measured values, obtain the radiation dose according to the linear fitting curve of amplitude and radiation dose.

9. The radiation dose measurement method according to claim 8, characterized in that, The linear fitting curve of amplitude versus radiation dose was obtained in the following way: The first test is conducted: any type of radiation is tested using a thermoluminescent dosimeter or a radiation-changing film to obtain the true dose of the radiation; the measured value of the radiation is obtained using the methods in S1 to S3. A second test is conducted: a different dose of radiation is used, and the true dose of the radiation is obtained again using a thermoluminescent dosimeter or a radiation-changing film. The measured value of the radiation is obtained using the methods in S1 to S3. Linear fitting is performed based on the actual dose and measured value obtained from the first test and the actual dose and measured value obtained from the second test to obtain a linear fitting curve of amplitude versus radiation dose.

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