A wide-range gamma-critical detector and detection method

Abstract

This invention discloses a wide-range gamma critical detector and detection method. The detector includes: a composite probe, which performs regional and critical radiation detection and self-testing under the control of a signal processing system, and outputs regional and critical signals corresponding to the regional and critical gamma dose rates of the environment; a signal processing system, which provides the composite probe with the corresponding operating voltage and self-test control, performs data conversion and counting acquisition of the regional and critical signals, and outputs the regional and critical radiation detection results; and a system that identifies and judges the critical radiation detection results based on a preset alarm threshold, and selects and outputs the corresponding alarm signal when the alarm threshold is exceeded. This invention utilizes a composite probe to simultaneously detect regional and critical radiation in the environment, thus widening the measurement range. The two alarm signals are selected and output according to the preset alarm threshold, which greatly reduces the false alarm rate and missed alarm rate of critical alarms, enhances reliability and stability, and has an extremely fast alarm response speed.

Description

Technical Field

[0001] This invention belongs to the field of nuclear radiation detection technology, specifically relating to a wide-range gamma critical detector and detection method. Background Technology

[0002] There is a potential risk of nuclear criticality accidents during the handling, application, storage, and transportation of fissile materials. Although the probability of such accidents is small, the damage they would cause if they occurred is enormous. Nuclear criticality monitoring and alarm systems can issue warnings before a criticality accident occurs, record radiation and changes at the accident site, and analyze the criticality accident process.

[0003] Because nuclear criticality accidents are extremely short-lived (milliseconds) and generate massive radiation fields instantaneously, they can cause ordinary regional radiation detectors to fail. Therefore, nuclear criticality monitoring and alarm systems must consider the extreme conditions of detector response time and measurement range. Simultaneously, nuclear criticality detectors need to detect even the smallest nuclear criticality accident as quickly as possible and trigger alarms with minimal delay. Furthermore, nuclear criticality detection signal processing must avoid the possibility of missed alarms caused by range switching.

[0004] Currently, gamma-critical detection is typically achieved using a composite detector consisting of an ionization chamber and a GM tube, or a plastic scintillator and a GM tube. In existing gamma-critical detection schemes, the GM tube is commonly used for regional radiation detection, while the plastic scintillator or ionization chamber detector is used for gamma-critical detection. These schemes use a single detector for either the plastic scintillator or the ionization chamber, which has the disadvantage of a narrow measurement range. This limits its application scenarios in practice, and it cannot respond promptly and reliably to radiation exceeding the measurement range of the critical gamma detector. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a wide-range gamma-critical detector and detection method. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention provides a wide-range gamma-critical detector, comprising: Composite probe and signal processing system; among which, The composite probe, under the control of the signal processing system, performs regional and critical radiation detection and self-test, and outputs the regional signal corresponding to the regional gamma dose rate and the critical signal corresponding to the critical gamma dose rate of the environment. The signal processing system provides the composite probe with the corresponding operating voltage and self-test control, performs data conversion and counting acquisition of regional and critical signals, and outputs regional radiation detection results and critical radiation detection results; it identifies and judges the critical radiation detection results based on the alarm threshold dose rate set by the user, and selects to output the corresponding alarm signal when the alarm threshold is exceeded.

[0006] In one embodiment of the present invention, the composite probe includes: The system comprises a first GM detector, a second GM detector, a first plastic flash detector, a second plastic flash detector, a first self-test LED, and a second self-test LED; among which, The first GM detector and the second GM detector are used for regional radiation detection; the first GM detector and the second GM detector have different measurement ranges; The first plastic scintillator and the second plastic scintillator are used for critical detection; the first plastic scintillator and the second plastic scintillator have different measurement ranges; The first self-test LED and the second self-test LED are used to provide self-test signals for the first plastic scintillator and the second plastic scintillator.

[0007] In one embodiment of the present invention, the signal processing system includes: The system includes a power supply drive module, a data conversion module, a control module, and an alarm judgment module; among which, The power supply and drive module provides the corresponding operating voltage for the composite probe; The data conversion module performs data conversion on the regional signals and critical signals acquired by the composite probe. The control module performs technical acquisition of the converted data, controls the data conversion module, performs corresponding self-test control of the composite probe, controls the alarm threshold of the alarm judgment module according to the alarm threshold dose rate set by the user, and stores and outputs the regional radiation detection results and critical radiation detection results. Under the control of the control module, the alarm judgment module identifies and judges the critical radiation detection results based on the critical radiation detection results, and selects to output the corresponding alarm signal when the alarm threshold is exceeded.

[0008] In one embodiment of the present invention, the power supply driving module includes: The system comprises a first high-voltage module, a second high-voltage module, a third high-voltage module, and a self-test control circuit; among which, Under the control of the control module, the first high-voltage module provides operating voltage to the first GM detector and the second GM detector in the composite probe; The second high-voltage module, under the control of the control module, provides the operating voltage to the first plastic scintillator in the composite probe; The third high-voltage module provides operating voltage to the second plastic scintillator in the composite probe under the control of the control module. The self-test control circuit, under the control of the control module, provides driving signals to the first self-test LED and the second self-test LED in the composite probe.

[0009] In one embodiment of the present invention, the alarm judgment module includes: The circuit includes a threshold control circuit, a first signal discrimination circuit, a second signal discrimination circuit, an alarm signal gating circuit, and an alarm signal driving circuit; among which, Under the control of the control module, the discrimination threshold control circuit transmits the discrimination voltage corresponding to the alarm threshold dose rate set by the user to the first signal discrimination circuit or the second signal discrimination circuit. The first signal discrimination circuit compares the voltage signal corresponding to the critical gamma dose rate with the discrimination voltage and outputs the first discrimination signal; The second signal discrimination circuit compares the voltage signal corresponding to the critical gamma dose rate with the discrimination voltage and outputs the second discrimination signal; Under the control of the control module, the alarm signal gating circuit selects either the first identification signal or the second identification signal for output. The alarm signal driving circuit converts the received first or second identification signal into an alarm signal output.

[0010] Secondly, the present invention provides a wide-range gamma critical detection method, comprising: Acquire the regional signal corresponding to the regional gamma dose rate of the environment and the critical signal corresponding to the critical gamma dose rate. The regional signal and the critical signal are converted and acquired accordingly, and the regional radiation detection results and the critical radiation detection results are output. The alarm threshold dose rate set by the user is obtained. Based on the alarm threshold dose rate set by the user, the corresponding signal discrimination circuit is selected to discriminate the critical radiation detection result. When the critical radiation detection result exceeds the alarm threshold dose rate, the first discrimination signal or the second discrimination signal is output. Convert the first or second identification signal into an alarm signal output.

[0011] In one embodiment of the present invention, the regional signal and the critical signal are respectively converted and acquired, and the regional radiation detection results and the critical radiation detection results are output, including: Convert the regional signal into a square wave pulse signal; The square wave pulse signal is counted, acquired, and converted to output the regional radiation detection results. Convert the current signal corresponding to the critical signal into a voltage signal, and then convert the voltage signal corresponding to the critical signal into a frequency signal. The frequency signal is counted, acquired, and converted to output the critical radiation detection result.

[0012] In one embodiment of the present invention, the critical radiation detection result is identified based on an alarm threshold dose rate set by the user. When the critical radiation detection result exceeds the alarm threshold dose rate, a first identification signal or a second identification signal is output, including: The alarm threshold dose rate is determined. If the alarm threshold dose rate is within the measurement range of the first plastic flash detector, and the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, a first discrimination signal is output. If the alarm threshold dose rate is within the measurement range of the second plastic flash detector, and the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, a second discrimination signal is output.

[0013] The beneficial effects of this invention are: The solution provided by this invention utilizes a composite probe to simultaneously detect regional radiation and critical radiation in the environment, thus broadening the measurement range of gamma critical detection. The alarm signals from the two plastic scintillator detectors can be selectively output according to preset alarm thresholds, greatly reducing the false alarm rate and missed alarm rate of critical alarms, enhancing reliability and stability, and providing extremely fast alarm response speed, making it suitable for more applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the principle of a wide-range gamma critical detector provided in an embodiment of the present invention. Figure 2 This is a schematic diagram illustrating the steps of a wide-range gamma critical detection method provided in an embodiment of the present invention. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0016] This invention provides a wide-range gamma critical detector and detection method.

[0017] Below, we will first introduce a wide-range gamma critical detector provided by an embodiment of the present invention.

[0018] The present invention provides a wide-range gamma-critical detector, such as... Figure 1 As shown, it may include: Composite probe and signal processing system; among which, The composite probe, under the control of the signal processing system, performs regional and critical radiation detection and self-test, and outputs the regional signal corresponding to the regional gamma dose rate and the critical signal corresponding to the critical gamma dose rate of the environment. The signal processing system provides the composite probe with the corresponding operating voltage and self-test control, performs data conversion and counting acquisition of regional and critical signals, and outputs regional radiation detection results and critical radiation detection results. Based on the alarm threshold dose rate set by the user, the critical radiation detection results are identified and judged, and when the alarm threshold is exceeded, the corresponding alarm signal is selected and output.

[0019] This wide-range gamma critical detector has a simple structure, reasonable design, and is easy to implement. Combined with specific measurement methods, it can effectively extend the measurement range of the gamma critical detector and improve its application scope.

[0020] Specifically, composite probes, such as Figure 1 As shown, it may include: The system comprises a first GM detector, a second GM detector, a first plastic flash detector, a second plastic flash detector, a first self-test LED, and a second self-test LED; among which, The first GM detector and the second GM detector are used for regional radiation detection; the first GM detector and the second GM detector have different measurement ranges. The first and second plastic scintillator detectors are used for critical detection; the first and second plastic scintillator detectors have different measurement ranges; The first self-test LED and the second self-test LED are used to provide self-test signals for the first plastic scintillator and the second plastic scintillator.

[0021] The first and second GM detectors are used for regional radiation detection and are auxiliary functions of this gamma-critical detector. They convert gamma rays emitted by radioactive materials into electrical signals. The measurement range of the first GM detector is 0.1 μGy / h to 10 mGy / h, and the measurement range of the second GM detector is 10 mGy / h to 10 Gy / h.

[0022] The first and second plastic scintillator detectors are used for critical detection, which is the main function of this gamma-critical detector. They consist of a plastic scintillator, a photomultiplier tube, and a voltage divider circuit, and can convert the gamma rays emitted by radioactive materials into electrical signals. The measurement range of the first plastic scintillator is 500 μGy / h to 50 mGy / h, and the measurement range of the second plastic scintillator is 50 mGy / h to 500 Gy / h, which can cover most critical detection application scenarios.

[0023] The first and second self-test LEDs provide self-test optical signals for the first and second plastic scintillator detectors, which are then converted into electrical signals by a photomultiplier tube.

[0024] Signal processing systems, such as Figure 1 As shown, it may include: The system includes a power supply drive module, a data conversion module, a control module, and an alarm judgment module; among which, The power supply and drive module provides the corresponding operating voltage for the composite probe; The data conversion module converts the regional signals and critical signals acquired by the composite probe. The control module performs technical acquisition of the converted data, high-voltage control of the data conversion module, corresponding self-test control of the composite probe, alarm threshold control of the alarm judgment module based on the alarm threshold dose rate set by the user, and stores and outputs the regional radiation detection results and critical radiation detection results. Under the control of the control module, the alarm judgment module identifies and judges the critical radiation detection results based on the critical radiation detection results, and selects to output the corresponding alarm signal when the alarm threshold is exceeded.

[0025] Power supply driver module, such as Figure 1 As shown, it may include: The system comprises a first high-voltage module, a second high-voltage module, a third high-voltage module, and a self-test control circuit; among which, Under the control of the control module, the first high-voltage module provides operating voltage to the first GM detector and the second GM detector in the composite probe. The second high-voltage module, under the control of the control module, provides the operating voltage to the first plastic scintillator in the composite probe; The third high-voltage module, under the control of the control module, provides the operating voltage to the second plastic scintillator in the composite probe; Under the control of the control module, the self-test control circuit provides drive signals to the first and second self-test LEDs in the composite probe.

[0026] The first high-voltage module provides a working high voltage for the first GM tube detector and the second GM tube detector. This working high voltage is a positive voltage.

[0027] The second high-voltage module provides a working high voltage for the first plastic scintillator. This working high voltage is a negative voltage and can be adjusted by controlling the voltage.

[0028] The third high-voltage module provides a working high voltage for the second plastic scintillator. This working high voltage is a negative voltage and can be adjusted by controlling the voltage.

[0029] The self-test control circuit provides driving electrical signals for the first self-test LED and the second self-test LED. The driving signal width, frequency, and duration can be set to simulate the signal when a critical event occurs.

[0030] Data conversion module, such as Figure 1 As shown, it may include: The circuit includes a GM tube signal processing and acquisition circuit, a first plastic scintillator signal conversion circuit, a second plastic scintillator signal conversion circuit, a first signal acquisition circuit, and a second signal acquisition circuit; among which, The GM tube signal processing and acquisition circuit converts the electrical signals from the first GM tube detector and the second GM tube detector into square wave pulse signals, which facilitates the subsequent circuitry to perform counting and acquisition, and then converts the count into the corresponding dose rate data.

[0031] The first and second plastic scintillator signal conversion circuits convert the weak current signals from the first and second plastic scintillator detectors into voltage signals, which are convenient for subsequent circuit processing. The signal conversion circuits also have pulse filtering functions, which can filter out interference pulse signals with a pulse width of less than 1ms.

[0032] The first signal acquisition circuit and the second signal acquisition circuit convert the voltage signals from the first plastic scintillator signal conversion circuit and the second plastic scintillator signal conversion circuit into frequency signals, which facilitates the subsequent circuits to perform counting and acquisition, and then converts the count into the corresponding dose rate data.

[0033] Control module, such as Figure 1 As shown, it may include: High-voltage regulation and control circuit and controller; among which, The high-voltage regulation and control circuit provides control voltage to the second and third high-voltage modules, regulates the output high voltage, and is implemented using a digital-to-analog converter.

[0034] The control module may further include: a communication circuit and a parameter storage circuit; wherein... The communication circuit is used to transmit the final regional gamma dose rate and gamma critical dose rate data, and can also receive instructions from the host computer.

[0035] The parameter storage circuit is used to store parameters such as the detector's operating high voltage, alarm threshold, and calibration coefficient, and can be implemented using an EEPROM memory.

[0036] The controller is used for counting acquisition, data conversion, high voltage control, self-test control, identification threshold control, alarm signal gating control, communication control, and parameter management. It is the core control device of this gamma critical detector.

[0037] Alarm judgment module, such as Figure 1 As shown, it may include: The circuit includes a threshold control circuit, a first signal discrimination circuit, a second signal discrimination circuit, an alarm signal gating circuit, and an alarm signal driving circuit; among which, Under the control of the control module, the discrimination threshold control circuit transmits the discrimination voltage corresponding to the alarm threshold dose rate set by the user to the first signal discrimination circuit or the second signal discrimination circuit. The first signal discrimination circuit compares the voltage signal corresponding to the critical gamma dose rate with the discrimination voltage and outputs the first discrimination signal. The second signal discrimination circuit compares the voltage signal corresponding to the critical gamma dose rate with the discrimination voltage and outputs the second discrimination signal. Under the control of the control module, the alarm signal gating circuit selects either the first discrimination signal or the second discrimination signal for output. The alarm signal driving circuit converts the received first or second identification signal into an alarm signal output.

[0038] The discrimination threshold control circuit generates a voltage value corresponding to the alarm threshold dose rate, providing discrimination voltage for the first signal discrimination circuit and the second signal discrimination circuit. It is implemented using a digital-to-analog converter and an amplifier, and is continuously adjustable within the measurement range.

[0039] The first signal discrimination circuit and the second signal discrimination circuit are used to generate alarm signals. When the voltage signal corresponding to the dose rate output by the first plastic flash signal conversion circuit and the second plastic flash signal conversion circuit exceeds the preset dose rate threshold, the first discrimination signal or the second discrimination signal is output.

[0040] The alarm signal gating circuit selects the first or second discrimination signal output according to the alarm threshold set by the user.

[0041] The alarm signal driving circuit converts the received first or second discrimination signal into an alarm signal output. It converts the received signal into a differential isolation signal that can be transmitted over long distances, thereby enhancing the driving capability and anti-interference capability of signal transmission and reducing the probability of false alarms.

[0042] The gamma critical detector proposed in this embodiment of the invention uses two plastic scintillator detectors. Through improvements and innovations in circuit design and measurement methods, the measurement range of gamma critical detectors is broadened. The alarm signals of the two plastic scintillator detectors can be selected for output according to a preset alarm threshold.

[0043] The composite probe simultaneously detects regional radiation and critical radiation in the environment, broadening the measurement range of gamma critical detection. The alarm signals from the two plastic scintillator detectors can be selected for output according to preset alarm thresholds, greatly reducing the false alarm and missed alarm rates of critical alarms, enhancing reliability and stability, and providing extremely fast alarm response speed, making it suitable for more applications.

[0044] Secondly, corresponding to the above-described embodiments of the gamma-critical detector, this invention also provides a wide-range gamma-critical detection method, such as... Figure 2 As shown, it may include: S1, acquiring the regional signal corresponding to the regional gamma dose rate of the environment and the critical signal corresponding to the critical gamma dose rate, may include: The first GM detector and the second GM detector in the composite probe are used to obtain the regional signal corresponding to the regional gamma dose rate of the environment. The first plastic scintillator and the second plastic scintillator in the composite probe are used to obtain the critical signal corresponding to the critical gamma dose rate of the environment.

[0045] In step S1, the first plastic scintillator and the second plastic scintillator convert the gamma radiation dose rate of the environment into a corresponding electrical signal.

[0046] S2 performs corresponding data conversion and acquisition on the regional signal and the critical signal respectively, and outputs the regional radiation detection results and the critical radiation detection results, which may include: Convert the regional signal into a square wave pulse signal; The square wave pulse signal is counted, acquired, and converted to output the regional radiation detection results. Convert the current signal corresponding to the critical signal into a voltage signal, and then convert the voltage signal corresponding to the critical signal into a frequency signal. The frequency signal is counted, acquired, and converted to output the critical radiation detection result.

[0047] The GM tube signal processing and acquisition circuit converts the electrical signals from the first and second GM tube detectors into square wave pulse signals, facilitating counting and acquisition by subsequent circuits, and then converting the counts into corresponding dose rate data. The signals are then converted into corresponding voltage signals by the first and second plastic scintillator signal conversion circuits, while filtering out interference pulse signals with a pulse width of less than 1 ms.

[0048] S3, acquire the user-set alarm threshold dose rate, select the corresponding signal discrimination circuit to discriminate the critical radiation detection result according to the user-set alarm threshold dose rate, and output a first discrimination signal or a second discrimination signal when the critical radiation detection result exceeds the alarm threshold dose rate, which may include: The alarm threshold dose rate is determined. If the alarm threshold dose rate is within the measurement range of the first plastic flash detector, and the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, a first discrimination signal is output. If the alarm threshold dose rate is within the measurement range of the second plastic flash detector, and the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, a second discrimination signal is output.

[0049] Specifically, according to the alarm threshold dose rate set by the user, the controller determines and converts the alarm threshold dose rate. If the converted alarm threshold is within the gamma critical measurement range of the first plastic scintillator, the controller controls the discrimination threshold control circuit to output a first discrimination voltage corresponding to the alarm threshold dose rate and provides it to the first signal discrimination circuit. When the voltage signal output by the first plastic scintillator signal conversion circuit is greater than the first discrimination voltage, the first signal discrimination circuit outputs a first discrimination signal. Simultaneously, the controller controls the alarm signal gating circuit to select and output the first discrimination signal output by the first signal discrimination circuit, closes the second signal discrimination circuit, and controls the alarm signal driving circuit to convert the first discrimination signal into an alarm signal output. If the converted alarm threshold is within the gamma critical measurement range of the second plastic scintillator, the controller controls the discrimination threshold control circuit to output a second discrimination voltage corresponding to the alarm threshold dose rate and provides it to the second signal discrimination circuit. When the voltage signal output by the second plastic scintillator signal conversion circuit is greater than the second discrimination voltage, the second signal discrimination circuit outputs a second discrimination signal. Simultaneously, the controller controls the alarm signal gating circuit to select and output the second discrimination signal output by the second signal discrimination circuit, closes the first signal discrimination circuit, and controls the alarm signal driving circuit to convert the second discrimination signal into an alarm signal output.

[0050] S4 converts the first or second identification signal into an alarm signal output.

[0051] In this embodiment of the invention, an alarm signal driving circuit is used to convert the received first or second discrimination signal into a differential isolation signal that can be transmitted over long distances as an alarm signal output, thereby enhancing the driving capability and anti-interference capability of signal transmission and reducing the probability of false alarms.

[0052] The gamma critical detection method provided in this invention utilizes a composite probe to simultaneously detect regional radiation and critical radiation in the environment, thus broadening the measurement range of gamma critical detection. The alarm signals from the two plastic scintillator detectors can be selectively output according to preset alarm thresholds, greatly reducing the false alarm rate and missed alarm rate of critical alarms, enhancing reliability and stability, and providing extremely fast alarm response speed, making it suitable for more applications.

[0053] It should be noted that, in the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A wide-range gamma-critical detector, characterized in that, include: Composite probe and signal processing system; among which, The composite probe, under the control of the signal processing system, performs regional and critical radiation detection and self-test, and outputs the regional signal corresponding to the regional gamma dose rate and the critical signal corresponding to the critical gamma dose rate of the environment. The composite probe includes: a first plastic scintillator and a second plastic scintillator; the first plastic scintillator and the second plastic scintillator are used for critical detection; the first plastic scintillator and the second plastic scintillator have different measurement ranges. The signal processing system provides the composite probe with corresponding operating voltage and self-test control, performs data conversion and counting acquisition of regional and critical signals, and outputs regional radiation detection results and critical radiation detection results; it also identifies and judges the critical radiation detection results based on the user-set alarm threshold dose rate, and selects to output corresponding alarm signals when the alarm threshold is exceeded, including: The alarm threshold dose rate is determined and converted as follows: If the converted alarm threshold is within the gamma critical measurement range of the first plastic scintillator, the first discrimination voltage corresponding to the alarm threshold dose rate is controlled and provided to the first signal discrimination circuit in the signal processing system. When the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, the first signal discrimination circuit is controlled to output the first discrimination signal, the second signal discrimination circuit in the signal processing system is turned off, and the first discrimination signal is converted into an alarm signal output. If the converted alarm threshold is within the gamma critical measurement range of the second plastic scintillator, the second discrimination voltage corresponding to the alarm threshold dose rate is controlled and provided to the second signal discrimination circuit. When the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, the second signal discrimination circuit is controlled to output the second discrimination signal, the first signal discrimination circuit is turned off, and the second discrimination signal is converted into an alarm signal output.

2. The wide-range gamma-critical detector according to claim 1, characterized in that, The composite probe includes: The system comprises a first GM detector, a second GM detector, a first self-test LED, and a second self-test LED; among which... The first GM detector and the second GM detector are used for regional radiation detection; the first GM detector and the second GM detector have different measurement ranges; The first self-test LED and the second self-test LED are used to provide self-test signals for the first plastic scintillator and the second plastic scintillator.

3. The wide-range gamma-critical detector according to claim 1, characterized in that, The signal processing system includes: The system includes a power supply drive module, a data conversion module, a control module, and an alarm judgment module; among which, The power supply and drive module provides the corresponding operating voltage for the composite probe; The data conversion module performs data conversion on the regional signals and critical signals acquired by the composite probe. The control module performs technical acquisition of the converted data, controls the data conversion module, performs corresponding self-test control of the composite probe, controls the alarm threshold of the alarm judgment module according to the alarm threshold dose rate set by the user, and stores and outputs the regional radiation detection results and critical radiation detection results. Under the control of the control module, the alarm judgment module identifies and judges the critical radiation detection results based on the critical radiation detection results, and selects to output the corresponding alarm signal when the alarm threshold is exceeded.

4. A wide-range gamma-critical detector according to claim 3, characterized in that, The power supply drive module includes: The system comprises a first high-voltage module, a second high-voltage module, a third high-voltage module, and a self-test control circuit; among which, Under the control of the control module, the first high-voltage module provides operating voltage to the first GM detector and the second GM detector in the composite probe; The second high-voltage module, under the control of the control module, provides the operating voltage to the first plastic scintillator in the composite probe; The third high-voltage module provides operating voltage to the second plastic scintillator in the composite probe under the control of the control module. The self-test control circuit, under the control of the control module, provides driving signals to the first self-test LED and the second self-test LED in the composite probe.

5. A wide-range gamma-critical detection method, applied in the wide-range gamma-critical detector as described in any one of claims 1-4, characterized in that, include: Acquire the regional signal corresponding to the regional gamma dose rate of the environment and the critical signal corresponding to the critical gamma dose rate. The regional signal and the critical signal are converted and acquired accordingly, and the regional radiation detection results and the critical radiation detection results are output. The system acquires the user-set alarm threshold dose rate, selects the appropriate signal discrimination circuit based on the user-set alarm threshold dose rate to discriminate the critical radiation detection result, and outputs a first discrimination signal or a second discrimination signal when the critical radiation detection result exceeds the alarm threshold dose rate, including: The alarm threshold dose rate is determined and converted as follows: If the converted alarm threshold is within the gamma critical measurement range of the first plastic scintillator, a first discrimination voltage corresponding to the alarm threshold dose rate is controlled and provided to the first signal discrimination circuit in the signal processing system. When the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, the first signal discrimination circuit is controlled to output a first discrimination signal, and the second signal discrimination circuit in the signal processing system is turned off. If the converted alarm threshold is within the gamma critical measurement range of the second plastic scintillator, a second discrimination voltage corresponding to the alarm threshold dose rate is controlled and provided to the second signal discrimination circuit. When the voltage corresponding to the alarm threshold dose rate is greater than the voltage corresponding to the critical radiation detection result, the second signal discrimination circuit is controlled to output a second discrimination signal, and the first signal discrimination circuit is turned off. Convert the first or second identification signal into an alarm signal output.

6. The wide-range gamma critical detection method according to claim 5, characterized in that, The process of performing corresponding data conversion and acquisition on the regional signal and the critical signal, and outputting the regional radiation detection results and the critical radiation detection results, includes: Convert the regional signal into a square wave pulse signal; The square wave pulse signal is counted, acquired, and converted to output the regional radiation detection results. Convert the current signal corresponding to the critical signal into a voltage signal, and then convert the voltage signal corresponding to the critical signal into a frequency signal. The frequency signal is counted, acquired, and converted to output the critical radiation detection result.

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