Wearable portable personal dose equivalent determination device

Abstract

The invention discloses wearable portable personal dose equivalent determination equipment. The equipment comprises a ray detection crystal, a photoelectric conversion module, an amplification module, a comparator and a data processing module, wherein the ray detection crystal is used for detecting rays irradiated by at least one part of a human body associated with the personal dose equivalent determination equipment and converting radiation energy of the rays into optical signals; the photoelectric conversion module is used for converting the optical signal into a first electric signal; the amplification module is used for amplifying the first electric signal to obtain a second electric signal; the comparator is used for comparing the second electric signal based on a reference signal to obtain a pulse sequence; and the data processing module is used for processing the pulse number of the pulses contained in the pulse sequence and determining the personal dose equivalent.

Description

Technical Field

[0001] The present application relates to the field of radiation protection technology, and in particular to a wearable and portable personal dose equivalent determination device. Background Art

[0002] In practical applications, personal dose equivalent is usually detected by thermoluminescent personal dosimeter or GM tube. However, thermoluminescent personal dosimeter requires a large readout instrument and heating operation to obtain personal dose equivalent. GM tube is large in size and consumes high power during operation. Therefore, the above technical solutions provided by the relevant technology cannot meet the needs of determining personal dose equivalent of personnel. Summary of the invention

[0003] Based on the above technical problems, an embodiment of the present application provides a wearable and portable personal dose equivalent determination device.

[0004] The technical solution provided by the embodiment of the present application is as follows:

[0005] A wearable and portable personal dose equivalent determination device comprises a radiation detection crystal, a photoelectric conversion module, an amplification module, a comparator and a data processing module; wherein:

[0006] The radiation detection crystal is used to detect radiation irradiated to at least one part of a human body associated with the personal dose equivalent determination device, and convert the radiation energy of the radiation into an optical signal;

[0007] The photoelectric conversion module is used to convert the optical signal into a first electrical signal;

[0008] The amplification module is used to amplify the first electrical signal to obtain a second electrical signal;

[0009] The comparator is used to compare the second electrical signal based on a reference signal to obtain a pulse sequence;

[0010] The data processing module is used to process the pulse number of the pulses included in the pulse sequence to determine the personal dose equivalent.

[0011] In some embodiments, the data processing module is used to count the pulses included in the pulse sequence within a unit time to obtain the number of pulses.

[0012] In some embodiments, the data processing module is further used to predetermine a calibration factor, and process the number of pulses based on the calibration factor to obtain the personal dose equivalent.

[0013] In some embodiments, the data processing module is used to fit the correlation between the k-ray radiation amount and the k-th pulse number based on the k-ray radiation amount in the target radiation environment and the k-th pulse number corresponding to the k-ray radiation amount, and determine the calibration factor based on the correlation; wherein k is an integer greater than or equal to 1 and less than or equal to K; K is an integer greater than 2.

[0014] In some embodiments, the amplification module includes a first amplification component and a second amplification component; wherein:

[0015] The first amplifying component is used to perform primary amplification processing on the first electrical signal to obtain a third electrical signal;

[0016] The second amplifying component is used to perform secondary amplification processing on the third electrical signal to obtain the second electrical signal.

[0017] In some embodiments, the data processing module includes an output component for outputting the personal dose equivalent; wherein the output component at least has a data display function.

[0018] In some embodiments, the data processing module further includes a communication component for sending the personal dose equivalent to a target device.

[0019] In some embodiments, the data processing module includes a collection component and a processing component; wherein:

[0020] The acquisition component is used to acquire at least one physiological indicator data of the human body;

[0021] The processing component is used to process the at least one physiological indication data to obtain at least one physiological index.

[0022] In some embodiments, the data processing module also includes an output component for outputting the at least one physiological indicator.

[0023] In some embodiments, the personal dose equivalent determination device also includes an electric energy conversion module and an energy storage module; wherein the electric energy conversion module is used to convert the initial electric energy output by the energy storage module to obtain target electric energy associated with the photoelectric conversion module, the amplification module and the comparator, and transmit the target electric energy to the photoelectric conversion module, the amplification module and the comparator; the energy storage module is used to store electric energy.

[0024] The radiation detection crystal contained in the wearable and portable personal dose equivalent determination device provided in the embodiment of the present application is used to detect the radiation irradiated to at least one part of the human body associated with the personal dose equivalent determination device, and convert the radiation energy of the radiation into an optical signal. In this way, through the radiation detection crystal, accurate real-time detection of the radiation irradiated to at least one part of the human body wearing the personal dose equivalent determination device can be achieved; and the photoelectric conversion module is used to convert the optical signal into a first electrical signal, thereby realizing targeted photoelectric conversion processing of the optical signal corresponding to the radiation irradiated to at least one part; at the same time, the amplification module is used to amplify the first electrical signal to obtain a second electrical signal The comparator is used to compare the second electrical signal based on the reference signal to obtain a pulse sequence. In this way, not only can the accuracy of the comparator in processing the second electrical signal be improved, but also the accurate quantification of the second electrical signal can be achieved; on this basis, the data processing module is used to process the number of pulses contained in the pulse sequence to determine the personal dose equivalent. In this way, through the mutual cooperation between the above-mentioned modules, the personal dose equivalent can be detected anytime and anywhere without the help of any external equipment and without the support of high power consumption and high electricity, thereby meeting the determination and detection needs of the personal dose equivalent, and then providing equipment protection for the health and safety of workers working in a radiation environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a personal dose equivalent determination device provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the structure of a YSO crystal and a silicon photomultiplier (SiPM) provided in an embodiment of the present application;

[0027] Figure 3 Another structural schematic diagram of a personal dose equivalent determination device provided in an embodiment of the present application;

[0028] Figure 4 A circuit schematic diagram of a personal dose equivalent determination device provided in an embodiment of the present application;

[0029] Figure 5 A circuit schematic diagram of an operational amplifier provided in an embodiment of the present application;

[0030] Figure 6 A circuit schematic diagram of a comparator provided in an embodiment of the present application;

[0031] Figure 7 A circuit schematic diagram of a boost circuit provided in an embodiment of the present application;

[0032] Figure 8A circuit schematic diagram of a low voltage differential linear voltage regulator circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0034] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] Personal dose equivalent refers to the dose equivalent in the soft tissue at an appropriate depth below a specified body surface. Accurate monitoring of personal dose equivalent can evaluate the radiation dose received by workers performing radioactive-related work, and is also an important part of occupational health management for the above workers. Its purpose is to ensure that the radiation dose received by the workers is less than the prescribed radiation dose corresponding to the national standard requirements, so as to maintain the health of the workers.

[0036] In actual applications, radiation workers measure doses by wearing personal dosimeters. Common personal dosimeters are divided into thermoluminescence type, GM tube type, semiconductor type and scintillator type dosimeters.

[0037] Among them, the thermoluminescent personal dosimeter needs to be equipped with a larger readout instrument and can only obtain the corresponding dose information after heating. Therefore, the thermoluminescent personal dosimeter cannot monitor the radiation status that workers may be exposed to at work in real time online; and although the GM tube has improved sensitivity, it is larger in size and requires a higher voltage when working, which results in higher power consumption and cannot meet the needs of longer work periods.

[0038] Based on the above technical problems, the embodiment of the present application provides a wearable and portable personal dose equivalent determination device. Figure 1 A schematic diagram of the structure of a personal dose equivalent determination device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the personal dose equivalent determination device 100 may include a radiation detection crystal 101, a photoelectric conversion module 102, an amplification module 103, a comparator 104 and a data processing module 105; wherein:

[0039] The radiation detection crystal 101 is used to detect the radiation irradiated to at least one part of the human body associated with the personal dose equivalent device, and convert the radiation energy of the radiation into an optical signal; the photoelectric conversion module 102 is used to convert the optical signal into a first electrical signal; the amplification module 103 is used to amplify the first electrical signal to obtain a second electrical signal; the comparator 104 is used to compare the second electrical signal based on a reference signal to obtain a pulse sequence; the data processing module 105 is used to process the number of pulses included in the pulse sequence to determine the personal dose equivalent.

[0040] In one embodiment, the personal dose equivalent determination device 100 can be a wrist wearable device; exemplarily, the personal dose equivalent determination device 100 can be fixed to the wrist of the staff member by a wristband set on its shell; exemplarily, the wristband can be fixed to the shell, or can be pluggably set on the shell; exemplarily, the wristband can be composed of elastic material, or can be composed of two parts of non-elastic, detachably connected strip materials, and the embodiment of the present application is not limited to this.

[0041] In one embodiment, the weight of the personal dose equivalent determination device 100 can be less than a first threshold, the volume can be less than a second threshold, and the power consumption can be less than a third threshold, so that it can meet the requirements of wearable and portable use, and can also meet the needs of long-term personal dose equivalent detection.

[0042] In one embodiment, the radiation detection crystal 101 may include a scintillator, wherein the scintillator is a solid or liquid material that can convert the energy of high-energy particles or radiation into visible light. Exemplarily, the radiation detection crystal 101 may include a YSO crystal, wherein the YSO crystal can emit a light signal after being irradiated by radiation or particles.

[0043] In one embodiment, if a worker is exposed to radiation, when the personal dose equivalent determination device 100 is in a state of being worn by the worker, the radiation detection crystal 101 can fit against the worker's wrist. At this time, the radiation irradiated on the wrist can irradiate the radiation detection crystal 101, so that it converts the radiation energy into a light signal; accordingly, at least one part of the human body associated with the personal dose equivalent determination device may include the wrist of the worker wearing the personal dose equivalent determination device.

[0044] In one embodiment, the optical signal may be a continuous analog signal.

[0045] In one embodiment, the photoelectric conversion module 102 may include a photoelectric conversion device; illustratively, the photoelectric conversion device may include a SiPM, wherein the SiPM is a commonly used photoelectric device used in combination with a scintillator, and includes a plurality of parallel micro units (microcells) or pixels (pixels) therein, each pixel is composed of an avalanche photodiode operating in a Geiger mode and a quenching resistor connected in series therewith, and after receiving a light signal, the SiPM can generate a first electrical signal under the action of photons in the light signal.

[0046] In practical applications, coupling scintillators with photoelectric conversion devices to form a detection module is one of the mainstream solutions adopted by electronic personal dosimeters in recent years. It realizes the combination of nuclear detection technology and electronic technology, and has the characteristics of high degree of digitization, small size and low power consumption.

[0047] In one implementation, the first electrical signal obtained by the photoelectric conversion module 102 converting the optical signal may be a continuous analog electrical signal; illustratively, the first electrical signal is an analog electrical signal having a double exponential pulse waveform.

[0048] Figure 2 This is a schematic diagram of the structure of the YSO crystal and SiPM provided in the embodiment of the present application. Figure 2 As shown, the periphery of the YSO crystal 201 is wrapped with a metal shielding cover 202, wherein the metal shielding cover 202 is used to fix the YSO crystal and the photoelectric conversion module, and can also block light; and the optical silicone grease 203 is used to couple the YSO crystal and the SiPM 204 to exclude the air at the interface between the two, reduce the total reflection of the optical signal at the interface, improve the transmittance, and enhance the light transmission efficiency; the photosensitive area of ​​the SiPM 204 can be 6mm*6mm, and its thickness after packaging can be 0.61mm, and the peak response wavelength can be 420nm, so that it can match the emission peak wavelength of 410nm of the YSO (Ce) crystal.

[0049] In one implementation, the amplification module 103 may include an operational amplifier capable of amplifying analog electrical signals.

[0050] In one implementation, the reference signal associated with the comparator 104 may be fixed or adjustable.

[0051] In one embodiment, the pulse sequence can be obtained by:

[0052] The comparator 104 compares the reference signal and the second electrical signal. If the mth instantaneous value corresponding to the second electrical signal at the mth moment is greater than the reference signal, the comparator outputs a pulse. If the mth instantaneous value is less than the reference signal, the comparator does not output a pulse. By traversing and comparing the instantaneous values ​​corresponding to all moments in the time period covered by the second electrical signal, a pulse sequence corresponding to the second electrical signal can be obtained; wherein m can be an integer greater than or equal to 1.

[0053] In one embodiment, the number of pulses included in the pulse sequence may be proportional to the number of instantaneous values ​​of the second electrical signal that are greater than the reference signal. Since the second electrical signal is proportional to the radiation energy of the radiation detected by the radiation detection crystal, the number of pulses in the pulse sequence can indirectly reflect the intensity of radiation to which the worker is exposed.

[0054] In one embodiment, the personal dose equivalent may be determined by:

[0055] The data processing module 105 counts the number of pulses to obtain a statistical result, and determines the statistical result as a personal dose equivalent.

[0056] From the above, it can be seen that the radiation detection crystal contained in the wearable and portable personal dose equivalent determination device provided in the embodiment of the present application is used to detect the radiation irradiated to at least one part of the human body associated with the personal dose equivalent determination device, and convert the radiation energy of the radiation into an optical signal. In this way, through the radiation detection crystal, it is possible to achieve accurate real-time detection of the radiation irradiated to at least one part of the human body wearing the personal dose equivalent determination device; and the photoelectric conversion module is used to convert the optical signal into a first electrical signal, thereby realizing targeted photoelectric conversion processing of the optical signal corresponding to the radiation irradiated to at least one part; at the same time, the amplification module is used to amplify the first electrical signal to obtain a second The comparator is used to compare the second electrical signal based on the reference signal to obtain a pulse sequence. In this way, not only can the accuracy of the comparator in processing the second electrical signal be improved, but also the accurate quantification of the second electrical signal can be achieved. On this basis, the data processing module is used to process the number of pulses contained in the pulse sequence to determine the personal dose equivalent. In this way, through the mutual cooperation between the above modules, the personal dose equivalent can be detected anytime and anywhere without the help of any external equipment and without the support of high power consumption and high electricity, thereby meeting the determination and detection needs of the personal dose equivalent, and further providing equipment protection for the health and safety of workers working in a radiation environment.

[0057] Based on the foregoing embodiments, in the personal dose equivalent determination device provided in the embodiments of the present application, the data processing module 105 is used to count the pulses contained in the pulse sequence within a unit time to obtain the number of pulses.

[0058] In one embodiment, the unit time may include minutes or several seconds; illustratively, the unit time may be preset, or may be adjusted according to the actual determination requirements of the personal dose equivalent, which is not limited in this embodiment of the present application.

[0059] As can be seen from the above, in the personal dose equivalent determination device provided by the present application, the data processing module is used to count the pulses contained in the pulse sequence within a unit time to obtain the number of pulses. In this way, controllable statistics of the number of pulses are achieved, which can not only reduce the consumption of power and data processing resources generated by continuous statistics of pulses in the pulse sequence, but also reduce the error of personal dose equivalent generated by the above continuous statistical operation.

[0060] Based on the foregoing embodiments, in the personal dose equivalent determination device provided in the embodiments of the present application, the data processing module 105 is also used to predetermine a calibration factor, and process the number of pulses based on the calibration factor to obtain a personal dose equivalent.

[0061] In one embodiment, the calibration factor may include a parameter or set of parameters used to calibrate the number of pulses.

[0062] In one embodiment, the calibration factor may include a weight value or a set of weight values ​​for weighting the number of pulses.

[0063] In one embodiment, the personal dose equivalent can be obtained by:

[0064] The number of pulses is weighted based on the weight value in the calibration factor, and the result of the weighted processing is determined as the personal dose equivalent; illustratively, the personal dose equivalent rate corresponding to the personal dose equivalent can be calculated by formula (1):

[0065]

[0066] in, is the personal dose equivalent rate in μSv / h, n is the counting rate of the number of pulses, and a and b can be calibration factors.

[0067] As can be seen from the above, the personal dose equivalent determination device and data processing module provided in the embodiment of the present application are also used to predetermine the calibration factor, and process the number of pulses based on the calibration factor to obtain the personal dose equivalent. In this way, through the above operation, the calibration processing of the number of pulses is realized, thereby improving the accuracy of the personal dose equivalent.

[0068] Based on the aforementioned embodiments, in the personal dose equivalent determination device provided in the embodiments of the present application, the data processing module is used to fit the correlation between the k-th ray radiation amount and the k-th pulse number based on the k-th ray radiation amount in the target radiation environment and the k-th pulse number corresponding to the k-th ray radiation amount, and determine the calibration factor based on the correlation.

[0069] Wherein, k is an integer greater than or equal to 1 and less than or equal to K, and K is an integer greater than 2.

[0070] In one embodiment, the target radiation environment may include a physical radiation environment in which the radiation amount of radiation is controllable and adjustable.

[0071] In one embodiment, the calibration factor may be determined as follows:

[0072] The kth radiation energy is converted through a ray detection crystal to obtain a kth light signal, and then the kth light signal is processed through a photoelectric conversion module to obtain an electrical signal corresponding to the kth light signal, and then the electrical signal corresponding to the kth light signal is amplified, and then the electrical signals corresponding to the amplified kth light signal are compared to obtain a kth pulse sequence corresponding to the kth light signal, and then the kth relationship between the kth pulse number corresponding to the kth pulse sequence and the kth radiation energy is determined, and then based on the first relationship to the Kth relationship, the calibration factor is fitted.

[0073] As can be seen from the above, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module is used to fit the correlation between the k-th ray radiation amount and the k-th pulse number based on the k-th ray radiation amount in the target radiation environment and the k-th pulse number corresponding to the k-th ray radiation amount, and determine the calibration factor based on the correlation. In this way, through the above steps, the accuracy of the calibration factor can be improved.

[0074] Figure 3 Another structural schematic diagram of a personal dose equivalent determination device provided in an embodiment of the present application is as follows: Figure 3 As shown, in the personal dose equivalent determination device provided in the embodiment of the present application, the amplification module 103 includes a first amplification component 1031 and a second amplification component 1032; wherein the first amplification component 1031 is used to perform primary amplification processing on the first electrical signal to obtain a third electrical signal, and the second amplification component 1032 is used to perform secondary amplification processing on the third electrical signal to obtain a second electrical signal.

[0075] In one implementation, the first amplifying component 1031 and the second amplifying component 1032 may be connected in series.

[0076] In one embodiment, the magnification of the first amplifying component 1031 and the magnification of the second amplifying component 1032 may be different.

[0077] In one implementation, a feedback circuit may be provided between the first amplifying component 1031 and the second amplifying component 1032 to improve the stability of the amplification process of the first amplifying component 1031 and the second amplifying component 1032 .

[0078] As can be seen from the above, in the personal dose equivalent determination device provided in the embodiment of the present application, the amplification module includes a first amplification component and a second amplification component, and the first amplification component is used to perform primary amplification processing on the first electrical signal to obtain a third electrical signal, and the second amplification component is used to perform secondary amplification processing on the third electrical signal to obtain a second electrical signal. In this way, with the help of the first amplification component and the second amplification component, the amplification gain of the amplification module can be improved, and the stability of the amplification processing of the first electrical signal can also be improved, thereby reducing the probability of oscillation and instability.

[0079] Based on the foregoing embodiment, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module includes an output component 1051 for outputting the personal dose equivalent; wherein the output component at least has a data display function.

[0080] In one embodiment, the data processing module may further include a processing component, and the processing component is used to process the number of pulses to obtain a personal dose equivalent.

[0081] In one embodiment, the processing component is electrically connected to the output component, so that after the processing component sends the personal dose equivalent to the output component 1051, the output component 1051 can output the personal dose equivalent.

[0082] In one embodiment, the output component 1051 can output the personal dose equivalent in at least one form of vibration, audio, and image.

[0083] In one embodiment, under the condition that the output component 1051 has at least a data display function, the output component 1051 may include a surface arranged on the housing of the personal dose equivalent determination device away from the radiation detection crystal side to facilitate the staff to read the personal dose equivalent.

[0084] As can be seen from the above, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module includes an output component for outputting the personal dose equivalent, and the output component at least has a data display function. In this way, through the output component, a flexible and intuitive display of the personal dose equivalent can be achieved.

[0085] Based on the foregoing embodiments, in the personal dose equivalent determination device provided in the embodiments of the present application, the data processing module 105 also includes a communication component 1052 for sending the personal dose equivalent to the target device.

[0086] In one implementation, the target device may include a mobile electronic device; illustratively, the mobile electronic device may include a mobile phone, a notebook computer, and the like.

[0087] In one embodiment, the target device may also include a non-mobile electronic device; illustratively, the non-mobile electronic device may include a cloud server or a management device of a personal dose equivalent determination device, etc.

[0088] In one embodiment, the communication component may include a wireless communication component or a wired communication component; illustratively, the wireless communication component may have a mobile communication function, wherein the mobile communication function may realize long-distance or short-distance wireless communication.

[0089] As can be seen from the above, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module also includes a communication component for sending the personal dose equivalent to the target device. In this way, through the communication component, the personal dose equivalent can be flexibly synchronized between the personal dose equivalent determination device and the target device.

[0090] Based on the foregoing embodiments, in the personal dose equivalent determination device provided in the embodiments of the present application, the data processing module includes an acquisition component 1053 and a processing component 1054; wherein the acquisition component 1053 is used to acquire at least one physiological indication data of the human body; and the processing component 1054 is used to process at least one physiological indication data to obtain at least one physiological index.

[0091] In one embodiment, at least one physiological indicator may also be sent to a target device via a communication component.

[0092] In one embodiment, the at least one physiological indicator data may include data such as blood pressure, heart rate, body temperature, and blood oxygen of the human body.

[0093] In one embodiment, at least one physiological indicator may include the amount of change in blood pressure per unit time, the range of body temperature change, the fluctuation state of heart rate, and blood oxygen saturation, etc.

[0094] In one embodiment, the processing component can perform statistics on at least one physiological indication data to obtain at least one physiological index.

[0095] As can be seen from the above, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module includes an acquisition component, a processing component and an output component, wherein the acquisition component is used to acquire at least one physiological indication data of the human body, and the processing component is used to process at least one physiological indication data to obtain at least one physiological index. In this way, through the above operations of the acquisition component and the processing component, the personal dose equivalent determination device can monitor and output at least one physiological index of the human body, thereby expanding the functional scope of the personal dose equivalent determination device.

[0096] Based on the foregoing embodiment, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module further includes an output component 1051 for outputting at least one physiological indicator.

[0097] In one embodiment, the output component can output at least one physiological indicator in the form of text and / or graph.

[0098] In one embodiment, the communication component may also send at least one physiological indicator to the target device.

[0099] As can be seen from the above, in the personal dose equivalent determination device provided in the embodiment of the present application, the data processing module further includes an output component for outputting at least one physiological indicator. Thus, the output component can realize an intuitive presentation of at least one physiological indicator.

[0100] Based on the foregoing embodiments, the personal dose equivalent determination device provided in the embodiments of the present application may further include an electric energy conversion module 106 and an energy storage module 107; wherein the electric energy conversion module is used to convert the initial electric energy output by the energy storage module to obtain the target electric energy associated with the photoelectric conversion module, the amplification module and the comparator, and transmit the target electric energy to the photoelectric conversion module, the amplification module and the comparator; the energy storage module 107 is used to store electric energy.

[0101] In one implementation, the energy storage module 107 may include at least one battery cell for receiving and storing electrical energy transmitted by a power supply device.

[0102] In one implementation, the target electric energy may include a first electric energy and a second electric energy, wherein the magnitude of the first electric energy may be greater than the magnitude of the second electric energy.

[0103] In one implementation, the power conversion module 106 may transmit the first power to the photoelectric conversion module, and transmit the second power to the amplification module and the comparator.

[0104] In one implementation, the power conversion module 106 may also convert the initial power to obtain third power that matches the data processing module, and transmit the third power to the data processing module.

[0105] As can be seen from the above, the power conversion module and energy storage module included in the personal dose equivalent determination device provided by the embodiment of the present application, wherein the power conversion module is used to convert the initial power output by the power supply device to obtain the target power associated with the photoelectric conversion module, the amplification module and the comparator, and transmit the target power to the photoelectric conversion module, the amplification module and the comparator, and the energy storage module is used to store power. Through the power storage function of the energy storage module, the personal dose equivalent determination device can get rid of the dependence on the power supply device, thereby improving the flexibility and portability of the use of the personal dose equivalent determination device; and, through the power conversion module, the flexible and accurate conversion of the initial power output by the energy storage module is realized, so that the target power can match the working power of the photoelectric conversion module, the amplification module and the comparator, thereby improving the stability of the working state of the photoelectric conversion module, the amplification module and the comparator.

[0106] Figure 4 The circuit schematic diagram of the personal dose equivalent determination device provided in the embodiment of the present application is as follows: Figure 4 As shown, the personal dose equivalent determination device may include a radiation detection module 401, a pulse output circuit 402 and a pulse processing circuit 403; wherein, the radiation detection module 401 may include a radiation detection crystal and a photoelectric conversion module, the pulse output circuit may include an amplification module including a first operational amplifier U1A and a second operational amplifier U1B, an electric energy conversion module composed of U1 and U2, and a comparator U3, and the pulse output circuit 402 may include a microcontroller, a screen and communication module and a sensor; wherein, the microcontroller may be the processing component in the aforementioned embodiment, the screen and communication module may include the output component and the communication component in the aforementioned embodiment, and the sensor may be the acquisition component in the aforementioned embodiment; illustratively, the sensor may include a small-volume multi-channel health monitoring chip.

[0107] Figure 5 Schematic diagram of a circuit of an operational amplifier provided in an embodiment of the present application; wherein the operational amplifier 500 may be the amplification module in the aforementioned embodiment; Figure 5 As shown, the operational amplifier 500 may include a first operational amplifier U1A and a second operational amplifier U1B, wherein the Vin pin is used to input the first electrical signal, and VCC is the +3.3V electrical energy obtained after the electrical energy conversion module converts the initial electrical energy; the secondary amplification circuit formed by the above circuit structure of the operational amplifier 500 can effectively improve the amplification factor for the first electrical signal and improve the system signal-to-noise ratio; wherein the amplification factor can be calculated by formula (2):

[0108]

[0109] Among them, the first amplifier and the second amplifier can form a low-power, high-speed, single-power supply, in-phase two-stage amplifier circuit, wherein resistors R3, R4, R7, and R8 respectively raise the in-phase input terminals of the first amplifier and the second amplifier to half of the power rail and provide a stable static operating point, so that the amplitude of the second electrical signal is significantly higher than the peak-to-peak value of the noise, thereby effectively reducing the false counting caused by noise to improve the stability of the circuit.

[0110] Figure 6 The circuit schematic diagram of the comparator provided in the embodiment of the present application is as follows: Figure 6 As shown, the comparator 104 can use a device with an open-drain output characteristic, and it can be pulled up by a resistor R 10 The voltage value electrically connected to the input pin of the back-end microcontroller can be flexibly selected according to the standards of different devices; at the same time, in order to reduce the output jitter caused by the analog pulse signal with superimposed noise repeatedly passing through the switching threshold, positive feedback can be used to increase hysteresis.

[0111] Combined with the above circuit schematic, resistors R1 and R2 can form positive feedback to form high and low dual comparison thresholds, so that the amplified double exponential pulse can be shaped into a digital pulse, thereby reducing the jitter pulse caused by noise and interference, thereby reducing the probability of miscounting and improving the accuracy of the system; and the voltage division of resistors R4 and R5 can generate a reference voltage V ref And input to the inverting input of the comparator, the resistor R 10 Pull up to high level and achieve compatibility with different microcontroller interfaces by setting different high level voltage values.

[0112] Among them, the high threshold and low threshold of the comparator after the hysteresis characteristic is introduced can be calculated by equations (3) to (4) respectively:

[0113]

[0114] in,

[0115] Figure 7 The circuit schematic diagram of the boost circuit provided in the embodiment of the present application is as follows: Figure 7 As shown, the boost circuit 700 can convert the initial voltage of 3.3V into the working voltage of 28V of SiPM and transmit it to SiPM to maintain the photoelectric conversion function of SiPM. At this time, SiPM can be in Geiger mode; wherein, Geiger mode refers to the working state in which the working voltage of SiPM is greater than its breakdown voltage.

[0116] For example, the operating voltage V of the SiPM in Geiger mode is op It can be calculated by formula (5):

[0117] V op =V br +V ov (5)

[0118] Among them, V br is the breakdown voltage, V ov The overvoltage may be greater than or equal to 1V and less than or equal to 5V.

[0119] exist Figure 7 In the embodiment, the boost chip U1 can be a constant frequency current mode boost converter, which is suitable for small low power consumption scenarios; the chip input voltage range can be 2.5 to 5.5V, and the maximum output voltage is 28V to meet the operating voltage required by SiPM. The chip can include a switch pin, which can be pulled down when the boost processing is not required to reduce power consumption; and the feedback pin can be connected to resistors of different resistance values ​​to achieve the regulation of the output voltage; wherein, the output voltage V out It can be calculated by formula (6):

[0120]

[0121] Figure 8 The circuit schematic diagram of the low voltage differential linear voltage regulator circuit provided in the embodiment of the present application is as follows: Figure 8 As shown, the low voltage differential linear voltage regulator circuit 800 is used to convert the initial voltage into a stable and low-noise operating voltage for an operational amplifier and a comparator, so as to convert a 3.3V power supply voltage into a 3V voltage with low noise.

[0122] The boost circuit and the low voltage differential linear voltage regulator circuit can together constitute the power conversion module in the aforementioned embodiment.

[0123] Through the above-mentioned circuit structure, the embodiment of the present application provides a personal dose equivalent determination device with high sensitivity, low power consumption, long standby time, high flexibility, good real-time performance, and easy integration. Through this device, flexible real-time detection and display of personal dose equivalent can be realized, and a variety of physiological indication data can be collected, so as to not only monitor personal dose equivalent, but also meet the needs of radiation workers for monitoring health data such as heart rate and blood oxygen.

[0124] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0125] The features disclosed in the various product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0126] The features disclosed in the various method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0127] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0128] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0129] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A wearable and portable personal dose equivalent determination device, characterized in that: The personal dose equivalent determination device includes a radiation detection crystal, a photoelectric conversion module, an amplification module, a comparator and a data processing module; wherein: The radiation detection crystal is used to detect radiation irradiated to at least one part of a human body associated with the personal dose equivalent determination device, and convert the radiation energy of the radiation into an optical signal; The photoelectric conversion module is used to convert the optical signal into a first electrical signal; The amplification module is used to amplify the first electrical signal to obtain a second electrical signal; The comparator is used to compare the second electrical signal based on a reference signal to obtain a pulse sequence; The data processing module is used to process the pulse number of the pulses included in the pulse sequence to determine the personal dose equivalent.

2. The personal dose equivalent determination device according to claim 1, characterized in that: The data processing module is used to count the pulses contained in the pulse sequence within a unit time to obtain the number of pulses.

3. The personal dose equivalent determination device according to claim 1, characterized in that: The data processing module is also used to predetermine a calibration factor and process the number of pulses based on the calibration factor to obtain the personal dose equivalent.

4. The personal dose equivalent determination device according to claim 3, characterized in that: The data processing module is used to fit the correlation between the k-ray radiation amount and the k-th pulse number based on the k-ray radiation amount in the target radiation environment and the k-th pulse number corresponding to the k-ray radiation amount, and determine the calibration factor based on the correlation; wherein k is an integer greater than or equal to 1 and less than or equal to K; K is an integer greater than 2.

5. The personal dose equivalent determination device according to claim 1, characterized in that: The amplification module comprises a first amplification component and a second amplification component; wherein: The first amplifying component is used to perform primary amplification processing on the first electrical signal to obtain a third electrical signal; The second amplifying component is used to perform secondary amplification processing on the third electrical signal to obtain the second electrical signal.

6. The personal dose equivalent determination device according to claim 1, characterized in that: The data processing module includes an output component for outputting the personal dose equivalent; wherein the output component at least has a data display function.

7. The personal dose equivalent determination device according to claim 1, characterized in that: The data processing module also includes a communication component for sending the personal dose equivalent to a target device.

8. The personal dose equivalent determination device according to claim 1, characterized in that: The data processing module includes a collection component and a processing component; wherein: The acquisition component is used to acquire at least one physiological indicator data of the human body; The processing component is used to process the at least one physiological indication data to obtain at least one physiological index.

9. The personal dose equivalent determination device according to claim 8, characterized in that: The data processing module also includes an output component for outputting the at least one physiological indicator.

10. The personal dose equivalent determination device according to claim 1, characterized in that: The personal dose equivalent determination device also includes an electric energy conversion module and an energy storage module; wherein the electric energy conversion module is used to convert the initial electric energy output by the energy storage module to obtain the target electric energy associated with the photoelectric conversion module, the amplification module and the comparator, and transmit the target electric energy to the photoelectric conversion module, the amplification module and the comparator; the energy storage module is used to store electric energy.

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