Self-checking system, method and equipment of portable nuclear detection equipment

Abstract

The invention relates to a self-checking system, method and device for portable nuclear detection equipment, and the system comprises a scintillator which is used for transmitting an optical signal when receiving nuclear radiation; the photomultiplier circuit is used for carrying out photoelectric conversion on the light emitted by the scintillator crystal; the multichannel analyzer is used for detecting a response signal of the photomultiplier circuit and carrying out quantitative analysis on the signal; the LED lamp is embedded between the scintillator and the photomultiplier tube circuit; and the LED lamp is connected with the FPGA chip. The self-checking method comprises the steps of starting a self-checking mode, adjusting the high-level time of the LED lamp to adapt to system gain, detecting and analyzing a response signal of the photomultiplier circuit, and adjusting self-checking parameters in time. The portable nuclear detection equipment is integrated with the self-checking system, and the processor and the memory are used for processing signals and storing data, so that the accurate monitoring and recording of the running state of the equipment are ensured. According to the invention, the self-checking efficiency and precision of the nuclear detection equipment are effectively improved, and the stability and reliability of the equipment in various environments are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear detection, and in particular to a self-checking system, method and device for portable nuclear detection equipment. Background Art

[0002] Portable nuclear detection equipment is used to detect the radioactivity level of the radiation environment to ensure the health of personnel and the safety of equipment. Before the equipment is put into operation, the status of internal components must be confirmed through the self-test system to avoid equipment failure due to component failure. Figure 1 As shown, the prior art usually uses a photomultiplier tube to perform photoelectric conversion on the light emitted by the scintillator crystal and multiply the electrons to achieve signal amplification and acquisition; however, when there is a problem with the scintillator itself, the device is unable to obtain a normal signal, and the device has no way to distinguish the source of the fault, resulting in low operating efficiency and low self-test accuracy of the portable nuclear detection equipment's self-test system. There is a risk of failure during nuclear radiation detection, which affects the user experience and overall quality of the equipment.

[0003] As a portable device, the device needs a self-test function to determine whether each functional module is working properly. Therefore, the invention intends to use LED instead of scintillator to perform self-test of the photomultiplier tube to the electronics system. When a problem occurs in the device, the self-test can determine whether it is a fault in the photomultiplier tube electronics or a fault in the scintillator. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a self-test system and method for a portable nuclear detection device to solve the problems of low operating efficiency and low self-test accuracy of the self-test system.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: The present invention provides a self-checking system for a portable nuclear detection device, characterized in that it comprises: Scintillators, which emit light signals when they receive nuclear radiation; A photomultiplier tube circuit performs photoelectric conversion on the light emitted by the scintillator crystal; A multi-channel analyzer detects the response signal of the photomultiplier tube circuit and performs quantitative analysis on the signal; wherein the multi-channel analyzer includes an FPGA chip; The LED lamp is embedded between the scintillator and the photomultiplier tube circuit and is used to simulate the light signal output of the scintillator; the LED lamp is connected to the FPGA chip, and the FPGA chip is used to control the lighting time and frequency of the LED lamp; The current limiting resistor is connected between the output pin of the FPGA chip and the LED lamp to limit the current and protect the LED lamp and the photomultiplier tube circuit.

[0006] Furthermore, the LED lamp is installed at the center of the scintillator to ensure that the light signal is evenly transmitted to the photomultiplier tube circuit.

[0007] Furthermore, the scintillator is an organic scintillator.

[0008] Furthermore, the frequency of the control signal between the output pin of the FPGA chip and the LED lamp can be adjusted in the range of 500 Hz to 2000 Hz to match different types of photomultiplier tube circuits.

[0009] Furthermore, it also includes an optical fiber for guiding the light signal emitted by the LED lamp to the photomultiplier tube circuit to improve the transmission efficiency of the light signal and reduce background noise interference.

[0010] The present invention also provides a self-test method for a portable nuclear detection device, comprising the following steps: turning on the self-test mode, the FPGA chip controls the lighting frequency of the LED lamp according to the device state; adjusting the high level time of the LED lamp to adapt to the system gain; detecting the response signal of the photomultiplier tube circuit; adjusting the self-test parameters according to the response signal to ensure that the photomultiplier tube circuit will not be saturated. This method not only simplifies the self-test process, but also improves the accuracy and efficiency of the self-test, and is suitable for nuclear emergency response and nuclear facility safety inspections that require rapid self-testing.

[0011] Furthermore, starting the self-check mode includes switching the state through a physical button on the device or a software command.

[0012] Furthermore, the high level time of the LED lamp is adjusted to calculate the required time according to the current system gain, so as to ensure the linear response of the photomultiplier tube circuit.

[0013] The present invention also provides a portable nuclear detection device, comprising the self-checking system of the portable nuclear detection device; and further comprising: A processor, used for processing a detection signal of a photomultiplier tube circuit; Memory, used to store device status and self-test data.

[0014] Furthermore, the processor adopts a multi-core architecture to improve signal processing speed and accuracy.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The self-test system and method provided by the present application realizes efficient self-test of the photomultiplier tube circuit of portable nuclear detection equipment by embedding LED lights to simulate the light signal generated by nuclear radiation. The precise control of the FPGA chip and the protection measures of the current limiting resistor ensure the stability and safety of the self-test process. In addition, by adjusting the high-level time and luminous intensity of the LED light, it can adapt to the self-test requirements under different gains, avoid the saturation of the photomultiplier tube circuit, and improve the accuracy and reliability of the self-test.

[0016] 2. The use of organic scintillators and optical fibers further improves the response speed, transmission efficiency and background noise suppression capabilities of optical signals, making the self-test system more efficient and stable. Overall, the self-test system and method of the present application can significantly improve the self-test efficiency and accuracy of portable nuclear detection equipment, providing a strong guarantee for the long-term stable operation of the equipment, and is particularly suitable for applications in the fields of nuclear radiation monitoring, nuclear safety inspections, and nuclear medical imaging. In actual applications, this self-test system and method can reduce the time for equipment maintenance and calibration, reduce operating costs, and improve the efficiency and safety of nuclear detection equipment. It is an important technological advancement in the field of nuclear detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The invention relates to a circuit for photoelectrically converting light emitted by a scintillator crystal using a photomultiplier tube in the prior art.

[0018] Figure 2 It is the self-checking system of the portable nuclear detection equipment of the present invention. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. It is usually described and shown in the drawings herein that the components can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments provided in the drawings is not intended to limit the scope of protection claimed, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 2 As shown, the present invention provides a self-test system for a portable nuclear detection device, comprising: a scintillator, which is used to emit a light signal when receiving nuclear radiation; a photomultiplier tube circuit, which performs photoelectric conversion on the light emitted by the scintillator crystal; a multi-channel analyzer, which detects the response signal of the photomultiplier tube circuit and performs quantitative analysis on the signal, so that the self-test system can more accurately quantify the response of the photomultiplier tube circuit, thereby improving the accuracy and credibility of the self-test result, wherein the multi-channel analyzer includes an FPGA chip; the innovation of the present invention is that it also includes an LED lamp, which is embedded between the scintillator and the photomultiplier tube circuit, and is used to simulate the light signal output of the scintillator; the LED lamp is connected to the FPGA chip, and the FPGA chip is used to control the lighting time and frequency of the LED lamp; and it also includes a current limiting resistor, which is connected between the output pin of the FPGA chip and the LED lamp, and is used to limit the current and protect the LED lamp and the photomultiplier tube circuit. The present invention adopts such a precise control and protection mechanism so that the self-test system can accurately simulate the actual working environment without damaging the equipment, ensuring the long-term stability and reliability of the equipment, and is particularly suitable for nuclear radiation monitoring stations and nuclear medicine laboratories that require frequent self-tests.

[0022] In one embodiment of the present invention, the LED lamp is installed at the center of the scintillator to ensure that the light signal is evenly propagated to the photomultiplier tube circuit. This design ensures the uniform distribution of the light signal and improves the stability and consistency of the self-test signal. The lighting frequency used to control the LED lamp is 1kHz, and the high level time is adjusted according to the system gain to ensure that the photomultiplier tube circuit will not be saturated in the self-test mode.

[0023] The luminous intensity of the LED lamp is controlled by adjusting the working current to meet the self-test requirements of different gains. This flexible adjustment mechanism enables the self-test system to adapt to various working environments and equipment states, improves the adaptability and efficiency of self-test, and is particularly suitable for nuclear radiation detectors and nuclear medicine equipment with large gain changes.

[0024] In one embodiment, the scintillator is an organic scintillator to improve the response speed and efficiency of the optical signal. The use of organic scintillators not only speeds up the generation of optical signals, but also increases the intensity of optical signals, so that the self-test system can detect the response of the photomultiplier tube circuit more quickly and accurately, and is suitable for nuclear safety inspections and nuclear reactor monitoring that require high sensitivity and fast response.

[0025] In one embodiment, the control signal frequency between the output pin of the FPGA chip and the LED lamp can be adjusted in the range of 500Hz to 2000Hz to match different types of photomultiplier tube circuits. This wide range of frequency adjustment capability enables the self-test system to be compatible with various types of photomultiplier tube circuits, improves the versatility and interchangeability of the equipment, and is suitable for the maintenance and inspection of various nuclear detection equipment.

[0026] In one embodiment, the self-test system further includes an optical fiber for guiding the light signal emitted by the LED lamp to the photomultiplier tube circuit to improve the transmission efficiency of the light signal and reduce the background noise interference. The use of the optical fiber not only improves the transmission efficiency of the light signal, but also reduces the interference of the background noise, so that the self-test system can more accurately detect the response of the photomultiplier tube circuit, which is suitable for nuclear medicine imaging and nuclear physics research that requires high-precision measurement and low background noise.

[0027] The present invention also provides a self-test method for the portable nuclear detection device, comprising the following steps: turning on the self-test mode, the FPGA chip controls the lighting frequency of the LED lamp according to the device state; adjusting the high level time of the LED lamp to adapt to the system gain; detecting the response signal of the photomultiplier tube circuit; adjusting the self-test parameters according to the response signal to ensure that the photomultiplier tube circuit will not be saturated. This method not only simplifies the self-test process, but also improves the accuracy and efficiency of the self-test, and is suitable for nuclear emergency response and nuclear facility safety inspections that require rapid self-test.

[0028] Among them, starting the self-test mode includes switching the state through a physical button on the device or a software command. This flexible switching method allows users to perform self-tests at any time as needed, improves the user-friendliness and operational convenience of the device, and is suitable for on-site operation and maintenance of various nuclear detection equipment.

[0029] Among them, adjusting the high-level time of the LED light further includes calculating the required time according to the current system gain to ensure the linear response of the photomultiplier tube circuit. This precise adjustment mechanism ensures the consistency of the self-test signal and the actual working signal, improves the accuracy and reliability of the self-test, and is suitable for nuclear medical imaging and nuclear physics research that require high-precision measurement.

[0030] The present invention also provides a portable nuclear detection device, comprising: a self-test system of the portable nuclear detection device as described above; a processor for processing the detection signal of the photomultiplier tube circuit; and a memory for storing the device status and self-test data. This device not only has an efficient self-test capability, but also can quickly process the detection signal and store the self-test data, thereby improving the overall performance and data management capability of the device, and is suitable for nuclear radiation monitoring and nuclear safety inspections that require real-time data processing and long-term data storage.

[0031] Among them, the processor adopts a multi-core architecture to improve the speed and accuracy of signal processing. The use of multi-core processors significantly improves the speed and accuracy of signal processing, allowing the equipment to respond to nuclear radiation changes more quickly, and is suitable for nuclear emergency response and nuclear facility safety monitoring that require real-time monitoring and rapid response. The memory includes a non-volatile storage unit for saving self-test data and equipment status when the equipment is powered off. The use of non-volatile storage units ensures the safe storage of equipment status and self-test data, and can maintain data integrity and consistency even when the equipment is powered off. It is suitable for nuclear radiation monitoring stations and nuclear medicine laboratories that require long-term data storage and data security.

[0032] The present invention also provides a computer-readable storage medium storing a computer program, which implements the self-test method described above when executed by a processor. The use of this storage medium enables the self-test method to be quickly loaded and executed by various processors, thereby improving the flexibility and efficiency of the self-test, and is suitable for nuclear detection equipment and nuclear medicine imaging systems that require rapid deployment and updating of self-test programs.

[0033] The storage media include but are not limited to flash memory, hard disk, optical disk and RAM. This diverse selection of storage media enables the self-test program to adapt to a variety of equipment types and working environments, improves the compatibility and versatility of the self-test system, and is suitable for the maintenance and testing of various nuclear detection equipment.

[0034] A computer program product includes a computer program stored on a computer-readable storage medium, and when the program is executed by a processor, the self-test method described above is implemented. The use of this program product not only simplifies the deployment and update of the self-test program, but also improves the accuracy and efficiency of the self-test, and is suitable for nuclear radiation monitoring stations and nuclear medicine laboratories that require rapid self-test and program update. The program product also includes a self-test system initialization module for automatically executing the self-test program when the device is started. The integration of the self-test system initialization module enables the device to automatically perform self-test at startup, ensuring that the device is in the best working condition before each use, and is suitable for nuclear emergency response equipment and nuclear facility safety inspection systems that require frequent startup and self-test.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A self-test system for a portable nuclear detection device, characterized in that: include: Scintillators, which emit light signals when they receive nuclear radiation; A photomultiplier tube circuit performs photoelectric conversion on the light emitted by the scintillator crystal; A multi-channel analyzer detects the response signal of the photomultiplier tube circuit and performs quantitative analysis on the signal; wherein the multi-channel analyzer includes an FPGA chip; The LED lamp is embedded between the scintillator and the photomultiplier tube circuit and is used to simulate the light signal output of the scintillator; the LED lamp is connected to the FPGA chip, and the FPGA chip is used to control the lighting time and frequency of the LED lamp; The current limiting resistor is connected between the output pin of the FPGA chip and the LED lamp to limit the current and protect the LED lamp and the photomultiplier tube circuit.

2. The self-test system of the portable nuclear detection equipment according to claim 1, characterized in that: The LED lamp is installed at the center of the scintillator to ensure that the light signal is evenly transmitted to the photomultiplier tube circuit.

3. The self-test system of the portable nuclear detection equipment according to claim 1, characterized in that: The scintillator is an organic scintillator.

4. The self-test system of the portable nuclear detection equipment according to claim 1, characterized in that: The frequency of the control signal between the output pin of the FPGA chip and the LED lamp can be adjusted in the range of 500 Hz to 2000 Hz to match different types of photomultiplier tube circuits.

5. The self-test system of the portable nuclear detection equipment according to claim 1, characterized in that: It also includes an optical fiber for guiding the light signal emitted by the LED lamp to the photomultiplier tube circuit to improve the transmission efficiency of the light signal and reduce background noise interference.

6. A self-test method for a portable nuclear detection device, characterized in that: The following steps are involved: When the self-test mode is turned on, the FPGA chip controls the lighting frequency of the LED light according to the device status; adjusts the high-level time of the LED light to adapt to the system gain; Detect the response signal of the photomultiplier tube circuit; adjust the self-test parameters according to the response signal to ensure that the photomultiplier tube circuit will not be saturated; This method not only simplifies the self-inspection process, but also improves the accuracy and efficiency of self-inspection. It is suitable for nuclear emergency response and nuclear facility safety inspections that require rapid self-inspection.

7. The self-test method of the portable nuclear detection equipment according to claim 6, characterized in that: The starting of the self-check mode includes switching the state through a physical button on the device or a software command.

8. The self-test method of the portable nuclear detection equipment according to claim 6, characterized in that: The high level time of the LED lamp is adjusted to calculate the required time according to the current system gain, so as to ensure the linear response of the photomultiplier tube circuit.

9. A portable nuclear detection device, characterized in that: A self-checking system comprising the portable nuclear detection device according to any one of claims 1 to 6; and further comprising: A processor, used for processing a detection signal of a photomultiplier tube circuit; Memory, used to store device status and self-test data.

10. The portable nuclear detection device according to claim 9, characterized in that: The processor adopts a multi-core architecture to improve signal processing speed and accuracy.

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