High-sensitivity personal dose alarm

Abstract

The utility model relates to the technical field of radioactivity detection, and discloses a high-sensitivity personal dose alarm apparatus, which comprises a power supply module, a CsI-SiPM detector, a PD detector, an ambient light sensor, an alarm module and a controller, and is characterized in that the power supply module is connected with the CsI-SiPM detector, the PD detector, the ambient light sensor, the alarm module and the controller; the CsI-SiPM detector, the PD detector, the alarm module and the ambient light sensor are all connected with the controller. The device can efficiently convert radiation energy into visible light signals, and is high in response sensitivity to light signals, accurate in radiation energy measurement, high in speed, low in power consumption and convenient to carry.

Description

Technical Field

[0001] This utility model relates to the field of radioactivity detection technology, specifically to a high-sensitivity personal dose alarm device. Background Technology

[0002] Most existing personal dosimeters use GM tubes as detectors. GM tubes generate electrical signals by detecting radiation particles in the environment. After amplification and processing, these signals are used to calculate the dose rate and cumulative dose, triggering an alarm when the radiation level exceeds a set threshold. However, GM tubes have low sensitivity to light signals and operate at relatively high voltages (approximately several hundred volts), posing significant safety hazards during use.

[0003] Existing personal dosimeters typically use replaceable dry cell batteries and wired connections for data transmission. Wired transmission may use other wired methods such as USB or serial port. This transmission method has some advantages, such as relatively stable connection, low latency and high transmission speed, but it also has some limitations, such as inconvenience of use and limitations imposed by connection length and environment. Utility Model Content

[0004] In view of this, the present invention provides a high-sensitivity personal dosing alarm to solve the problem of low sensitivity in existing personal dosing alarms.

[0005] This utility model provides a high-sensitivity personal dosimeter alarm, comprising: a power supply module, a CsI-SiPM detector, a PD detector, an ambient light sensor, an alarm module, and a controller. The power supply module is connected to the CsI-SiPM detector, the PD detector, the ambient light sensor, the alarm module, and the controller. The CsI-SiPM detector, the PD detector, the alarm module, and the ambient light sensor are all connected to the controller.

[0006] This invention provides a high-sensitivity personal dosimeter alarm. The CsI-SiPM detector can sensitively detect weak radiation and efficiently convert the radiation energy into a visible light signal. Furthermore, the CsI-SiPM detector has high sensitivity to light signals, and the PD detector requires a low bias voltage, making the personal dosimeter alarm both safe and sensitive while being easily portable. This invention also utilizes an ambient light sensor to detect ambient light leaking into the personal dosimeter alarm's housing, eliminating interference from ambient light on the measurement results and improving the reliability of the measurements. The integrated design of the personal dosimeter alarm reduces complexity, lowers costs, and improves portability.

[0007] In one optional implementation, the power supply module includes: a Type-C interface device, a fast charging unit, a charge / discharge protection unit, a battery, and a voltage conversion unit connected in series.

[0008] The personal dosing alarm device provided by this invention features a fast-charging unit that shortens battery charging time, enabling continuous operation without battery replacement. A charge / discharge protection unit prevents overcharging and over-discharging, improving battery safety.

[0009] In one optional implementation, the alarm module includes an alarm light, a vibration motor, and a buzzer, wherein the alarm light, the vibration motor, and the buzzer are all connected to the controller.

[0010] In one alternative implementation, the personal dosimeter further includes a signal processing circuit connected to the controller, the CsI-SiPM detector, and the PD detector.

[0011] In one alternative implementation, the signal processing circuit includes an amplifier circuit and a pulse comparison circuit connected in series.

[0012] In one alternative implementation, the personal dosing alarm further includes buttons and a screen, wherein both buttons and the screen are connected to a controller.

[0013] In one optional implementation, the personal dose alarm device further includes a positioning module connected to the controller, the positioning module having a built-in Beidou positioning unit, a GPS positioning unit and a UWB positioning unit.

[0014] The high-sensitivity personal dosimeter alarm provided by this utility model uses Beidou and GPS for outdoor positioning to improve the success rate of positioning; and uses UWB technology for indoor positioning to achieve high-precision indoor positioning.

[0015] In one alternative implementation, the personal dosing alarm further includes a flash memory connected to the controller.

[0016] In one alternative implementation, the personal dosing alarm further includes a communication module connected to the controller and server.

[0017] In one alternative implementation, the personal dose alarm further includes a clock unit connected to the controller. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1This is a composition diagram of a personal dosing alarm device according to an embodiment of the present utility model;

[0020] Figure 2 This is a composition diagram of the power supply module according to an embodiment of the present utility model;

[0021] Figure 3 This is a composition diagram of the alarm module according to an embodiment of the present utility model;

[0022] Figure 4 This is a composition diagram of another human dose alarm device according to an embodiment of the present utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, 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; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] Traditional instruments for detecting ionizing radiation generally use GM tubes, which are widely used in nuclear radiation detection, radioactive material monitoring, and radiation measurements in laboratories and industry. Based on the principle of GM tubes, ionizing radiation interacts with gas molecules to generate ion pairs, and these ion pairs are used to induce current pulses, thereby detecting the presence and intensity of radiation. However, GM tubes have low sensitivity to light signals, leading to inaccurate measurement results, and they also have the problem of high operating voltage, posing certain safety hazards during portable use.

[0028] This embodiment provides a high-sensitivity personal dosing alarm device, such as Figure 1 As shown, it includes: controller 1, power supply module 2, CsI-SiPM detector 3, PD detector 4, ambient light sensor 5 and alarm module 6. The power supply module 2 is connected to the CsI-SiPM detector 3, PD detector 4, ambient light sensor 5, alarm module 6 and controller 1. The CsI-SiPM detector 3, PD detector 4, ambient light sensor 5 and alarm module 6 are all connected to controller 1.

[0029] Specifically, Figure 1 In this device, controller 1, ambient light sensor 5, and alarm module 6 are all integrated on a single circuit board. Power supply module 2 supplies power to controller 1, ambient light sensor 5, and alarm module 6 via lines on this circuit board. Controller 1, power supply module 2, CsI-SiPM detector 3, PD detector 4, ambient light sensor 5, and alarm module 6 are all housed inside the personal dosimeter housing. The detection ends of CsI-SiPM detector 3 and PD detector 4 extend out of the housing to collect real-time radiation dose rates outside the housing.

[0030] Specifically, Figure 1 In this circuit, the CsI-SiPM detector 3 is a combination of a SiPM detector and a CsI scintillator. The SiPM detector consists of many tiny photodiodes used to detect the arrival time and intensity of photons. The circuit of the SiPM detector 4 consists of a high-voltage circuit and a signal processing circuit. The high-voltage circuit uses a low-power power supply chip to reduce system power consumption and extend operating time. The CsI scintillator utilizes the flashes of light produced by ionizing radiation in certain substances for detection. When there is radiation in the environment, atoms or molecules in the CsI scintillator that are ionized or excited by the radiation energy emit visible light during the de-excitation process. The visible light generated by the CsI scintillator is converted into an electrical signal by the SiPM detector and output to the controller 1.

[0031] Specifically, Figure 1In this circuit, the PD detector (4-pole photodetector) utilizes the photoelectric effect, where photons are absorbed and electrons are released when they strike a semiconductor material, generating current or voltage. The PD detector's circuitry consists of a charge-sensitive preamplifier, a multi-stage amplifier circuit, and a comparator. After capturing the radiation signal and generating a charge, the charge-sensitive preamplifier converts the weak charge signal into a voltage pulse signal. This weak voltage signal is then amplified to the required amplitude by the multi-stage amplifier circuit. Finally, the comparator converts the voltage pulse into a rectangular pulse, which is then transmitted to the controller (1). Compared to GM transistors, the PD detector requires only a few volts of bias voltage, consumes less power, and is suitable for portable devices and battery-powered applications. It also offers superior performance at high count rates.

[0032] Specifically, Figure 1 In the process, controller 1 simultaneously acquires the electrical signals output by CsI-SiPM detector 3 and PD detector 4, and automatically switches the measurement range based on the data from the two detectors. For example, when the ambient radiation dose is below 2 mSv / h, the data output by CsI-SiPM detector 3 is used, and when the ambient radiation dose is above 2 mSv / h, the data output by PD detector 4 is used.

[0033] It should be noted that the controller can compare the magnitude of the output electrical signal of the CsI-SiPM detector and the PD detector with the built-in voltage range respectively, and automatically switch the range loop according to the comparison result, such as the level signal. Those skilled in the art can use existing technology to set the range switching method of the controller. That is, this embodiment only protects the structure of the personal dosimeter alarm and does not protect the range switching method.

[0034] Specifically, Figure 1 In this embodiment, the personal dose alarm uses a combination of CsI-SiPM detector 3 and PD detector 4 to detect radiation dose rate. Compared with the traditional GM tube, the SiPM detector of CsI-SiPM detector 3 has high sensitivity to light signals. The ambient light sensor 5 is used to detect the ambient light intensity inside the personal dose alarm housing to prevent ambient light from entering the housing due to housing damage or gaps at the connection and affecting the measurement results.

[0035] Optionally, Figure 1In the personal dosimeter alarm module 6, alarm devices such as a buzzer, vibration motor, and alarm light may be included. When the controller 1 determines that the ambient radiation level exceeds a preset threshold based on the electrical signals sent by the CsI-SiPM detector 3 and the PD detector 4, the controller 1 activates the alarm devices in the alarm module 6. When the ambient light sensor 5 detects that the light intensity exceeds a preset brightness threshold, the ambient light sensor 5 outputs a sensing signal to the controller 1. The controller 1 can then display this signal on the screen of the personal dosimeter alarm or activate the buzzer, vibration motor, and alarm light of the personal dosimeter alarm to remind the user of the influence of external light and prompt the user to replace or reassemble the casing of the personal dosimeter alarm.

[0036] Optionally, Figure 1 In the middle, the power supply module 2 includes a rechargeable battery and a voltage conversion module, which can output different levels of power supply voltage to power different devices.

[0037] The high-sensitivity personal dosimeter alarm provided in this embodiment utilizes a CsI-SiPM detector, which can sensitively detect weak radiation and efficiently convert the radiation energy into a visible light signal. The CsI-SiPM detector exhibits high sensitivity to light signals, while the PD detector requires a low bias voltage, resulting in a personal dosimeter alarm that offers excellent safety and sensitivity while being easily portable. The SiPM detector boasts advantages such as high gain, high sensitivity, and low operating voltage, performing exceptionally well in detecting weak radiation. Combined with a CsI scintillator, it can efficiently convert weak radiation energy into a visible light signal. Furthermore, the CsI-SiPM detector requires only a bias voltage of tens of volts, offering higher safety compared to traditional GM tubes. This embodiment also utilizes an ambient light sensor to detect ambient light leaking into the personal dosimeter alarm's housing, eliminating interference from ambient light on the measurement results and improving their reliability. The integrated design of the personal dosimeter alarm reduces complexity, lowers costs, and enhances portability.

[0038] In some alternative implementations, such as Figure 2 As shown, the power supply module includes: a Type-C interface device 21, a fast charging unit 22, a charge / discharge protection unit 23, a battery 24, and a voltage conversion unit 25 connected in series.

[0039] Specifically, Figure 2 In this device, the personal dosing alarm utilizes a fast charging unit 22 for fast charging. Compared to traditional personal dosing alarms that use dry batteries, there is no need to replace the battery after shutting down, meeting the needs of continuous operation. The charging efficiency is more than 50% higher than that of traditional personal dosing alarms without fast charging function, supporting simultaneous charging and use. It also integrates a charge and discharge protection unit 23, supporting real-time monitoring of charging status and temperature control to prevent overcharging and over-discharging of the battery.

[0040] In some alternative implementations, such as Figure 3 As shown, the alarm module 6 includes an alarm light 61, a vibration motor 62, and a buzzer 63, wherein the alarm light 61, the vibration motor 62, and the buzzer 63 are all connected to the controller 1.

[0041] Specifically, Figure 3 In China, human dose alarm devices can achieve radiation monitoring and alarm functions through LED light, vibration, or sound.

[0042] In some alternative implementations, such as Figure 4 As shown, the personal dose alarm also includes a signal processing circuit 7, which is connected to the controller 1, the CsI-SiPM detector 3, and the PD detector 4.

[0043] Optionally, the signal processing circuit includes an amplifier circuit and a pulse comparison circuit connected in series.

[0044] Optionally, Figure 4 In the signal processing circuit 7, a signal amplification circuit and a pulse comparison circuit are used. The signal amplification circuit amplifies the electrical signals output by the CsI-SiPM detector 3 and the PD detector 4 and inputs them into the pulse comparison circuit. After comparing them with the threshold voltage, the corresponding electrical signal is output to the controller 1.

[0045] In some alternative implementations, such as Figure 4 As shown, the personal dose alarm also includes: button 8 and screen 9, wherein both button 8 and screen 9 are connected to controller 1.

[0046] Optionally, Figure 4 In the middle, screen 9 can display information such as radiation dose rate and external light leakage into the personal dose alarm housing. Users can switch the display status of screen 9 by pressing buttons.

[0047] In some alternative implementations, such as Figure 4 As shown, the personal dose alarm device also includes a positioning module, which is connected to the controller 1. The positioning module has a built-in Beidou positioning unit, GPS positioning unit and UWB positioning unit.

[0048] Specifically, Figure 4 In terms of outdoor positioning, BeiDou and GPS are used to improve the success rate, while UWB technology is used for indoor positioning to achieve high-precision indoor positioning. Through multi-system redundancy design, the positioning success rate is increased to 99.7%. Combined with existing positioning software, it can realize functions such as high-precision indoor and outdoor positioning, electronic fence and area alarm, path tracing and exposure analysis.

[0049] In some alternative implementations, the personal dosing alarm also includes a flash memory 11 and a communication module 12, wherein both the flash memory 11 and the communication module 12 are connected to the controller 1.

[0050] Specifically, Figure 4 In this system, controller 1 stores real-time dose rate, cumulative dose, alarm data, and location information in flash memory 11, and synchronously transmits it to the server via 4G technology through communication module 12. Local data information stored in flash memory 11 allows users to access it interactively via buttons 8 and screen 9. 4G wireless transmission technology enables remote transmission and real-time monitoring of radiation detection data, improving the flexibility and practicality of the equipment, enhancing emergency response capabilities, and making the monitoring process more convenient. This solves the problems of existing personal dose alarms, such as low dose rate range, inconvenience of wired data transmission, and poor reliability.

[0051] Optionally, the communication module can also use Bluetooth LAN transmission technology, allowing the personal dosimeter to connect to a companion mobile application or a dedicated receiver to transmit monitoring data via Bluetooth; it can also use wireless LAN transmission technology to connect to a local area network or the Internet to transmit monitoring data to a remote server or cloud platform; or it can use fiber optic wired transmission technology to achieve high-speed, stable wired data transmission with low signal attenuation and anti-interference capabilities; or it can use infrared short-range transmission technology to enable the personal dosimeter to transmit data within a short range, such as communicating with a companion receiver or monitoring device.

[0052] Optionally, Figure 4 The personal dose alarm also includes a clock 13, which is connected to the controller 1 and is used to record the device's running time and real-time.

[0053] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A high sensitivity personal dosimeter alarm characterized in that, The personal dose alarm comprises a power supply module, a CsI-SiPM detector, a PD detector, an ambient light sensor, an alarm module and a controller, wherein The power supply module is connected with the CsI-SiPM detector, the PD detector, the ambient light sensor, the alarm module and the controller. The CsI-SiPM detector, the PD detector, the alarm module and the ambient light sensor are all connected with the controller. The power supply module comprises a Type-C interface device, a fast charging unit, a charge and discharge protection unit, a battery and a voltage conversion unit connected in sequence.

2. The high sensitivity personal dosimeter alarm according to claim 1, characterized in that, The alarm module comprises an alarm lamp, a vibration motor and a buzzer, wherein The alarm lamp, the vibration motor and the buzzer are all connected with the controller.

3. The high sensitivity personal dosimeter alarm of claim 1, wherein, Further comprising a signal processing circuit, 4. The high sensitivity personal dosimeter alarm of claim 1, wherein, The signal processing circuit is connected with the controller, the CsI-SiPM detector and the PD detector.

5. The high-sensitivity personal dose alarm according to claim 4, wherein The signal processing circuit comprises an amplification circuit and a pulse comparison circuit connected in series. Further comprising a key and a screen, wherein 6. The high sensitivity personal dosimeter alarm of claim 1, wherein, The key and the screen are both connected with the controller. Further comprising a positioning module, 7. The high sensitivity personal dosimeter alarm of claim 1, wherein, The positioning module is connected with the controller, and the positioning module is internally provided with a Beidou positioning unit, a GPS positioning unit and a UWB positioning unit. Further comprising a flash memory, 8. The high sensitivity personal dosimeter alarm of claim 1, wherein, The flash memory is connected with the controller. Further comprising a communication module, 9. The high sensitivity personal dosimeter alarm of claim 1, wherein, The communication module is connected with the controller and a server. Further comprising a clock, 10. The high sensitivity personal dosimeter alarm of claim 1, wherein, The clock is connected with the controller. ​ ​

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