Flicker detection system with self-checking path status function and self-checking method thereof

Abstract

The present invention discloses a scintillation detection system with a self-checking path status function and a self-checking method thereof, which solves the problem that the detection device of the path status of the existing scintillation detection system is complex in structure and occupies a large number of resources. Specifically, it comprises a scintillation detector, a shielding shell, a high-voltage coaxial cable, a light source, a capacitor unit, an oscilloscope and a power supply; the scintillation detector, the light source and the capacitor unit are all arranged in the shielding shell; the high-voltage coaxial cable comprises an inner conductor core wire of the cable and a cable shielding mesh layer coaxially sleeved outside the inner conductor core wire of the cable; one end of the inner conductor core wire of the cable is connected to the output connector port of the power supply, and the other end is connected to the high-voltage input port of the scintillation detector; one end of the cable shielding mesh layer is connected to the ground wire of the power supply, and the other end is connected to the shielding shell; the input end of the oscilloscope is connected to the signal output end of the scintillation detector; one end of the capacitor unit is connected to the inner conductor core wire, and the other end is connected to a pin at one end of the light source; the other end pin of the light source is connected to the cable shielding mesh layer.

Description

Technical Field

[0001] The present invention relates to path state detection of a detection system, in particular to a flicker detection system with a self-detection path state function and a self-detection method thereof. Background Art

[0002] Scintillation detectors are commonly used in the field of pulsed radiation field measurement. They consist of a scintillator (radiation conversion), a light collection system, and a photosensitive device (photoelectric conversion), and are used to detect ionizing radiation charged particles.

[0003] A detection system built based on a scintillation detector typically includes: a detector section, a signal and high-voltage transmission section, and a signal recording section. The detector section primarily converts information from the pulsed radiation source into an electrical signal that can be transmitted and recorded. Its structural design is determined by the type of radiation pulse particles and the intensity of the radiation pulses being detected. The signal and high-voltage transmission section includes a high-voltage transmission cable that provides operating voltage to the detector section and a signal transmission cable that transmits the current signal output by the detector to the signal recording section. The signal recording section transmits the electrical signal output by the detector via an RF coaxial signal cable to the high-sampling-rate oscilloscope channel that constitutes the recording section, enabling testing of the radiation pulse waveform and subsequent analysis and processing of the waveform characteristics. By connecting the detector section, the signal and high-voltage transmission section, and the signal recording section, a complete scintillation detection system can be constructed.

[0004] After the scintillation detection system is established, it is necessary to constantly monitor the system's path status to ensure that it is functioning properly. This is especially true for projects involving large-scale systems and long transmission distances, where real-time and efficient system-wide path status monitoring is essential.

[0005] There are two existing methods for detecting the path status of a scintillation detection system:

[0006] A scintillation detector system uses a DC high-voltage power supply to provide operating voltage. The scintillation detector is powered up with the same or different step voltages. As the vacuum photoelectric device in the scintillation detector gradually increases in power to its normal operating voltage, a microammeter monitors its anode dark pulse. When the voltage jumps from a low potential to a high potential, a transient pulse voltage surge is generated. The dark current signal output at the corresponding operating voltage is reflected by the transient voltage surge on the relatively stable dark current value measured by the microammeter, superimposed with the transient current surge. With each successive voltage surge, the dark current value of the vacuum photoelectric device measured by the microammeter relative to the operating voltage will first overshoot and then return to the stable dark current measurement value. This method, which detects and confirms whether the scintillation detection system is in normal operation, is simple and effective, but requires connecting a signal transmission cable to the microammeter and presupposes that the channel of the oscilloscope recording portion must be operating normally. Furthermore, this detection method does not monitor the photoelectric conversion process of the vacuum photoelectric device. Therefore, the shortcomings of this detection method are: the detection content of the detection system path status is incomplete.

[0007] Another method for real-time and convenient detection of the path status is to set up a dedicated path inspection circuit after the scintillation detection system is constructed. A pulse signal source provides an excitation signal to the light source in front of the light window of the vacuum photoelectric device set in the scintillation detector through this inspection circuit. The light source generates a pulse light signal, and the vacuum photoelectric device responds to the light pulse and outputs an anode current signal. The signal is recorded by the signal recording part, thereby detecting the working status of the scintillation detection system. This detection method requires laying a dedicated excitation electrical signal cable for the light source that provides the light signal, and preparing a pulse signal source device to excite the light source to emit light. Implementation requires the special configuration of transmission cables and other instrument resources, resulting in a complex structure and high resource consumption of the entire scintillation detection system. Summary of the Invention

[0008] The present invention provides a flicker detection system and a self-test method thereof with a self-test path status function, aiming to solve the problem that, when performing path status detection in existing flicker detection systems, there is a deficiency of incomplete detection content, or it is necessary to lay a dedicated excitation electrical signal cable for the light source providing the optical signal, and prepare a pulse signal source device to excite the light source to emit light, resulting in a complex structure of the entire flicker detection system and a large amount of resource occupation.

[0009] In order to achieve the above object, the present invention provides a flicker detection system with a self-checking path status function, which has the following features: it includes a flicker detector, a shielded housing, a high-voltage coaxial cable, a light source, a capacitor unit, an oscilloscope, and a power supply;

[0010] The scintillation detector, light source and capacitor unit are all arranged in a shielding shell;

[0011] The high-voltage coaxial cable includes an inner conductor core wire and a cable shielding layer coaxially sleeved outside the inner conductor core wire; one end of the inner conductor core wire is connected to the power output connector port, and the other end is connected to the high-voltage input port of the scintillation detector; one end of the cable shielding layer is connected to the ground wire of the power supply, and the other end is connected to the shielding shell;

[0012] The oscilloscope input end is connected to the signal output end of the scintillation detector;

[0013] One end of the capacitor unit is connected to the inner conductor core wire, and the other end is connected to a pin at one end of the light source; the other end of the pin of the light source is connected to the cable shielding layer.

[0014] Furthermore, the capacitor unit includes a capacitor C, one end of the capacitor C is connected to the inner conductor core wire, and the other end is connected to one end of the light source;

[0015] Alternatively, the capacitor unit includes two or more capacitors C, and each capacitor C is connected in series or in parallel, one end of the capacitors C connected in series or in parallel is connected to the inner conductor core wire, and the other end is connected to one end of the light source.

[0016] Furthermore, the capacitor C is a non-polar high-voltage ceramic capacitor.

[0017] Furthermore, it also includes a detector output signal splitter and an oscilloscope;

[0018] The oscilloscope includes at least two recording channels;

[0019] The signal output end of the scintillation detector is connected to the input end of the detector output signal splitter through a radio frequency coaxial signal transmission cable;

[0020] Each output end of the detector output signal splitter is connected to the input end of each recording channel of the oscilloscope respectively.

[0021] Furthermore, it also includes a resistor R located in the shielding shell;

[0022] The resistor R is connected in parallel with the light source.

[0023] Furthermore, one end of the negative electrode pin of the light source is connected to the inner conductor core wire of the cable, which is suitable for when the scintillation detector operates at a negative high voltage;

[0024] Alternatively, one end of the positive pin of the light source is connected to the inner conductor core wire of the cable, which is suitable for when the scintillation detector operates at positive high voltage.

[0025] Furthermore, the withstand voltage parameter of the capacitor unit is greater than 1.5 times the operating voltage of the scintillation detector.

[0026] At the same time, the present invention also provides a self-test method for a scintillation detection system with a self-test path status function. Based on the above-mentioned scintillation detection system with a self-test path status function, the method is special in that it includes the following steps:

[0027] Step 1: setting a power-on step amplitude for the power supply so that the power supply can simultaneously power the scintillation detector and the light source;

[0028] Step 2: The power supply is stepped from a low potential to a high potential to generate a transient impulse voltage, thereby providing a pulse current signal to the light source, lighting the light source, and causing it to emit a pulse light signal.

[0029] Step 3: Observe the moment when the light source is turned on to see whether the signal output by the flicker detector is normal, and then determine in real time whether the path status of the flicker detection system is normal.

[0030] Furthermore, after step 3, the following step is also included:

[0031] Step 4: determining waveform characteristic information output by the scintillation detector in response to the pulse signal to be measured, wherein the waveform characteristic information includes at least pulse polarity, pulse amplitude, waveform leading edge, waveform trailing edge, and waveform half-width;

[0032] Step 5: According to the waveform characteristic information output by the scintillation detector, the channel sensitivity, oscilloscope time base, and trigger level of the oscilloscope are adjusted to put the scintillation detection system into a working state ready for detection.

[0033] Furthermore, when the voltage of the power supply is added to the normal operating voltage of the scintillation detector, the voltage change rate provided by the power supply to the scintillation detector is less than 0.1%.

[0034] Beneficial effects of the present invention:

[0035] 1. The flicker detection system provided by the present invention provides a shielded shell for the flicker detector, light source and capacitor unit, and reasonably connects the power supply with other components and the shielded shell through a high-voltage coaxial cable, forming a flicker detection system that can self-check the path status. The detection system does not require the laying of path detection cables in advance, nor does it require the separate configuration of a pulse signal source to excite the light source. The entire system simply and effectively implements the detection of the entire system status, can ensure the integrity of the detection content, and achieves the simplification of resources.

[0036] 2. The power supply in the present invention not only supplies power to the entire flicker detection system, but also supplies power to the path status detection circuit. While ensuring the normal operation of the detection system, it realizes real-time detection of the path connection status of the entire system, which is simple and practical.

[0037] 3. The scintillation detection system of the present invention can perform real-time detection of its own path status, thereby more effectively ensuring the normal operation of the entire scintillation detection system.

[0038] 4. The scintillation detection system provided by the present invention can not only significantly save experimental costs when the transmission distance is long and the system scale is large, but also complete the path status detection work of all scintillation detection systems in a relatively short time, which is economical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of a structure of an embodiment of a scintillation detection system with a self-checking path status function according to the present invention;

[0040] Figure 2 This is a second structural diagram of an embodiment of a scintillation detection system with a self-checking path status function according to the present invention;

[0041] Figure 3 This is the waveform of the signal output from the anode of the photomultiplier tube (included in the scintillation detector) when the instantaneous voltage shock in the different step voltage boosting processes in the embodiment of the present invention excites the light source to emit light.

[0042] Figure Number:

[0043] 2-1. Scintillation detector, 2-2. RF coaxial signal transmission cable, 2-3. High-voltage coaxial cable, 2-4. Shielded shell, 2-5. Cable inner conductor core, 2-6. Cable shielding layer, 3-1. Detector output signal splitter, 3-21. Oscilloscope first recording channel, 3-22. Oscilloscope second recording channel, 3-3. Power supply. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] Principle of the invention: Without separately setting up a path detection signal transmission cable and an excitation signal source, the present invention uses the instantaneous impulse voltage during the pressurization process of the high-voltage transmission cable to illuminate the light source generating device located on the front side of the optical window of the vacuum photoelectric device of the scintillation detector, and utilizes the existing scintillation detection system to perform real-time detection of its own path status, while ensuring that it does not affect the normal test working state of the scintillation detector for radiation pulses.

[0046] A flicker detection system with a self-checking path status function, such as Figure 1 and Figure 2 As shown, it includes a scintillation detector 2-1, a shielding shell 2-4, a high-voltage coaxial cable 2-3, a light source, a capacitor unit, a power supply 3-3, a detector output signal splitter 3-1, an oscilloscope and a resistor R;

[0047] The scintillation detector 2-1, light source, capacitor unit and resistor R are all arranged in the shielding shell 2-4; the high-voltage coaxial cable 2-3 includes an inner conductor core wire 2-5 of the cable and a cable shielding mesh layer 2-6 coaxially sleeved on the outer side of the inner conductor core wire 2-5 of the cable; one end of the inner conductor core wire 2-5 of the cable is connected to the output connector port of the power supply 3-3, and the other end is connected to the high-voltage input port of the scintillation detector 2-1; one end of the cable shielding mesh layer 2-6 is connected to the ground wire of the power supply 3-3, and the other end is connected to the shielding shell 2-4; one end of the capacitor unit is connected to the inner conductor core wire 2-5, and the other end is connected to one end pin of the light source, and the withstand voltage parameter of the capacitor unit is greater than 1.5 times the working voltage of the scintillation detector 2-1; the other end pin of the light source is connected to the cable shielding mesh layer 2-6, and the embodiment of the present invention uses a light-emitting diode (LED) as the light source. The determining factor for whether the positive or negative pin of the LED is connected to the inner conductor core wire 2-5 of the cable is determined by the operating voltage polarity of the scintillation detector 2-1. When the scintillation detector 2-1 operates at a negative high voltage, the negative pin of the light source is connected to the inner conductor core wire 2-5 of the cable; when the scintillation detector 2-1 operates at a positive high voltage, the positive pin of the light source is connected to the inner conductor core wire 2-5 of the cable, and the other pin is connected to the shielding shell 2-4, that is, connected to the cable shielding mesh layer 2-6 to form a loop. Among them, the capacitor unit includes at least one capacitor C; when the capacitor unit includes two or more capacitors C, each capacitor C is connected in series with each other, or in parallel with each other, in this embodiment, they are connected in series. Capacitor C can be a kilovolt high-voltage direct current (DC) isolation magnetic dielectric capacitor, preferably a non-polar ceramic capacitor. The function of the capacitor unit is to isolate the DC high voltage signal, and only pass the instantaneous voltage shock pulse when the potential increases step by step. The value of the capacitor unit should take into account the time performance of the RC circuit. The capacitor unit is the key point of the present invention, playing the role of isolating DC and allowing AC. Without the capacitor unit, this method is difficult to implement. To ensure safe and effective operation of the capacitor unit, its withstand voltage parameter is determined based on the operating voltage of the vacuum photoelectric device in scintillation detector 2-1, at least 1.5 times higher than the operating voltage of the vacuum photoelectric device. If the withstand voltage of a single capacitor C is lower than the operating voltage of the photoelectric device, multiple capacitors C can be connected in series to achieve safe capacitor operation. Resistor R is connected in parallel across the pins of the light source. The circuit formed by capacitor C and resistor R can mitigate the impact of transient pulse voltage, making the voltage application process of the photoelectric device smoother and safer. When a transient voltage surge pulse occurs, the current is diverted from the LED, protecting the LED from overload damage caused by transient voltage overshoot. Furthermore, capacitor C serves as an energy storage device in the scintillation detector's power supply circuit, replenishing the scintillation detector's charge during pulse signal testing and stabilizing the voltage of the scintillation detector under pulse operating conditions.The scintillation detector 2-1 is connected to the input end of the detector output signal splitter 3-1 through the radio frequency coaxial signal transmission cable 2-2; the first output end of the detector output signal splitter 3-1 is connected to the input end of the first recording channel 3-21 of the oscilloscope, and its second output end is connected to the input end of the second recording channel 3-22 of the oscilloscope.

[0048] Power supply 3-3 provides a high-voltage DC power source for the entire scintillation detection system. The scintillation detector 2-1 is composed of a radiation converter (e.g., an organic scintillator, an inorganic scintillator, or a Cherenkov radiator) and a vacuum photoelectric device. The radiation converter converts the radiation pulse signal to be tested into an optical signal. The vacuum photoelectric device then converts the optical signal into a recordable electrical signal through photoelectric conversion, thereby completing the measurement of the radiation pulse signal. The electrical signal detected by the scintillation detector 2-1 is transmitted and distributed to the first and second recording channels 3-21 and 3-22 of the oscilloscope via the RF coaxial signal transmission cable 2-2 and the detector output signal splitter 3-1, respectively. The detector output signal splitter 3-1 can be an electronic device such as a coaxial power splitter, a coaxial power attenuator, or a signal amplifier. The oscilloscope can be a high-sampling-rate digital oscilloscope. The high-sampling-rate digital oscilloscope can set parameters such as the waveform sampling rate, recording length, and trigger channel of the recording channel according to test requirements. The current signal output by the scintillation detector is converted into a voltage signal through the internal resistance of the high-sampling-rate digital oscilloscope and recorded. By analyzing and processing the recorded waveform characteristics, the purpose of diagnosing information such as the timing and intensity of the radiation pulse is achieved. This scintillation detection system can not only provide a stable operating voltage for the scintillation detector, but also quickly and efficiently perform real-time, near-end, or remote detection of the scintillation detection system's operating status.

[0049] An embodiment of the present invention further provides a self-test method for a scintillation detection system having a self-test path status function. Based on the above-mentioned scintillation detection system having a self-test path status function, the method specifically includes the following steps:

[0050] Step 1: Set the power-on step amplitude for the power supply so that the power supply can supply power to the scintillation detector 2-1 and the light source simultaneously.

[0051] Specifically, analyze the waveform characteristics of the radiation pulse signal to be measured, select an organic scintillator to cooperate with a vacuum photoelectric converter (the vacuum photoelectric converter in this embodiment is a photomultiplier tube) to form a scintillation detector 2-1, design a shielding shell 2-4 with electromagnetic shielding performance for the scintillation detector 2-1, first test and select the performance parameters of the photomultiplier tube, and then assemble the organic scintillator and the photomultiplier tube in the shielding shell 2-4. Determine the sensitivity range of the scintillation detector 2-1, and calibrate its sensitivity on the corresponding radiation simulation device and different radiation sources. Install an LED in front of the photomultiplier tube light window of the scintillation detector 2-1 with calibrated sensitivity, and the LED is adjusted according to the sensitivity range. Figure 2 Connect the scintillation detector using a scintillation detection method and place it at the measurement location. A DC high-voltage power supply 3-3 provides the system with operating voltage. A radio frequency coaxial signal transmission cable, namely high-voltage coaxial cable 2-3, is used as the transmission medium for the scintillation detector's output current signal. The cable model is determined based on a combination of factors, including signal amplitude, bandwidth, transmission distance, and project requirements. Once the scintillation detection system is established, set the power-up step amplitude for power supply 3-3.

[0052] Step 2: The power supply is stepped from low potential to high potential to generate instantaneous impulse voltage, provide a pulse current signal for the light source, light up the light source LED, and make it emit a pulse light signal.

[0053] Specifically, such as Figure 3 As shown, DC high-voltage power supply 3-3 applies a negative polarity operating voltage to the photomultiplier tube. This voltage is gradually increased from a low potential to the normal operating voltage of the photoelectric device. During the successive power-up steps, the transient surge voltage generated by the voltage jump from a low potential to a higher potential (from -1000V to -1200V, -1200V to -1400V, -1400V to -1600V, and -1600V to -1700V) provides the LED with a transient pulse operating current for tens of milliseconds, illuminating the LED and emitting a transient pulse light signal. The photomultiplier tube gradually increases its voltage into the operating range, responding to the pulse light signal emitted by the LED, enabling real-time detection of the entire system's path status. Figure 3 This is the waveform of the photomultiplier tube's anode output in response to a pulsed light signal during the DC high-voltage power supply's four-step voltage boost. Once the DC high-voltage power supply reaches the photomultiplier tube's predetermined operating voltage, it provides a stable operating voltage with a voltage variation rate of less than 0.1%. This eliminates sudden transients, prevents the LED from operating, and allows the detector to enter its normal detection state.

[0054] Step 3: Observe the moment when the light source is turned on to see if the signal output by the scintillation detector 2-1 is normal, and then determine in real time whether the path status of the scintillation detection system is normal.

[0055] Specifically, the optoelectronic device gradually ramps up its voltage to enter the operating range and begins operating, responding to pulsed light signals emitted by the LED, thereby performing real-time monitoring of the flicker detection system. When the flicker detection system reaches a predetermined operating voltage and enters a stable operating state, high-voltage power supply 3-3 operates in a stable output mode with a voltage stability of less than or equal to 0.1%. The LED in the path status check shunt no longer emits light. The flicker detection system completes the radiation pulse signal testing process. Specifically, when a radiation pulse signal arrives, it undergoes a measurement process involving radiation-induced light and then light-to-electrical signal conversion, converting the radiation pulse signal into a pulsed current signal that can be transmitted and recorded.

[0056] Step 4: determining waveform characteristic information output by the scintillation detector 2-1 in response to the pulse signal to be measured, wherein the waveform characteristic information includes at least pulse polarity, pulse amplitude, waveform leading edge, waveform trailing edge, and waveform half-width;

[0057] Step 5: According to the waveform characteristic information output by the scintillation detector 2-1, the vertical sensitivity, oscilloscope time base, trigger level, scanning speed, etc. of the first recording channel 3-21 and the second recording channel 3-22 of the oscilloscope are adjusted to put the scintillation detection system into a working state to be tested.

[0058] Specifically, the output signal of the photomultiplier tube anode is first distributed by the detector output signal splitter 3-1. The embodiment of the present invention preferably uses a coaxial power divider, and then enters the first recording channel 3-21 and the second recording channel 3-22 of the oscilloscope respectively. Of course, a corresponding number of high-sampling-rate digital oscilloscope recording channels can also be arranged according to measurement needs. The settings of the oscilloscope include: vertical sensitivity, time base, trigger level, etc., which are adjusted according to the characteristics of the waveform being tested.

[0059] The method has the advantages of convenient implementation, resource economy, practicality and effectiveness, and can achieve the purpose of real-time working status detection of the scintillation detection system.

[0060] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention shall be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A self-test method for a scintillation detection system having a self-test path status function, based on a scintillation detection system having a self-test path status function, characterized by: The scintillation detection system with a self-checking path status function comprises a scintillation detector (2-1), a shielding shell (2-4), a high-voltage coaxial cable (2-3), a light source, a capacitor unit, an oscilloscope, and a power supply (3-3); The scintillation detector (2-1), the light source, and the capacitor unit are all arranged in a shielding shell (2-4); The high-voltage coaxial cable (2-3) comprises a cable inner conductor core wire (2-5) and a cable shielding mesh layer (2-6) coaxially sleeved outside the cable inner conductor core wire (2-5); one end of the cable inner conductor core wire (2-5) is connected to the output connector port of the power supply (3-3), and the other end is connected to the high-voltage input port of the scintillation detector (2-1); one end of the cable shielding mesh layer (2-6) is connected to the ground wire of the power supply (3-3), and the other end is connected to the shielding shell (2-4); The oscilloscope input end is connected to the signal output end of the scintillation detector (2-1); One end of the capacitor unit is connected to the inner conductor core wire (2-5) of the cable, and the other end is connected to a pin at one end of the light source; the other end of the pin of the light source is connected to the cable shielding layer (2-6); The self-test method of the scintillation detection system with the self-test path status function comprises the following steps: Step 1: setting a power-on step amplitude for the power supply (3-3) so that the power supply (3-3) can supply power to the scintillation detector (2-1) and the light source simultaneously; Step 2: The power supply (3-3) is energized in a step-by-step manner from a low potential to a high potential to generate an instantaneous impulse voltage, thereby providing a pulse current signal to the light source, lighting the light source, and causing it to emit a pulse light signal; Step 3: Observe the moment when the light source is turned on to see if the signal output by the flicker detector (2-1) is normal, and then determine in real time whether the path status of the flicker detection system is normal; Step 4, determining waveform characteristic information output by the scintillation detector (2-1) in response to the pulse signal to be measured, wherein the waveform characteristic information at least includes pulse polarity, pulse amplitude, waveform leading edge, waveform trailing edge, and waveform half-width; Step 5: According to the waveform characteristic information output by the scintillation detector (2-1), the channel sensitivity, oscilloscope time base and trigger level of the oscilloscope are adjusted to put the scintillation detection system into a working state ready for detection.

2. The self-test method of a scintillation detection system with a self-test path status function according to claim 1, characterized in that: In step 2, when the voltage of the power supply (3-3) is added to the normal operating voltage of the scintillation detector (2-1), the voltage change rate provided by the power supply (3-3) to the scintillation detector (2-1) is less than 0.1%.

3. The self-test method of a scintillation detection system with a self-test path status function according to claim 2, characterized in that: The capacitor unit includes a capacitor C, one end of which is connected to the inner conductor core wire (2-5) of the cable, and the other end of which is connected to one end of the light source; Alternatively, the capacitor unit includes two or more capacitors C, and each capacitor C is connected in series or in parallel, one end of the capacitors C connected in series or in parallel is connected to the inner conductor core wire (2-5) of the cable, and the other end is connected to one end of the light source.

4. The self-test method of a scintillation detection system with a self-test path status function according to claim 3, characterized in that: The capacitor C is a non-polar high-voltage ceramic capacitor.

5. The self-test method of a scintillation detection system with a self-test path status function according to claim 4, characterized in that: The scintillation detection system with the function of self-checking the path status further comprises a detector output signal splitter (3-1) and an oscilloscope; The oscilloscope includes at least two recording channels; The signal output end of the scintillation detector (2-1) is connected to the input end of the detector output signal splitter (3-1) via a radio frequency coaxial signal transmission cable (2-2); Each output end of the detector output signal splitter (3-1) is connected to the input end of each recording channel of the oscilloscope respectively.

6. The self-test method of a scintillation detection system with a self-test path status function according to claim 5, characterized in that: The flicker detection system with a self-checking path status function further includes a resistor R located in the shielding housing (2-4); The resistor R is connected in parallel with the light source.

7. The self-test method of a scintillation detection system with a self-test path status function according to claim 6, characterized in that: One end of the negative electrode pin of the light source is connected to the inner conductor core wire (2-5) of the cable, which is suitable for when the scintillation detector (2-1) operates at a negative high voltage; Alternatively, one end of the positive electrode pin of the light source is connected to the inner conductor core wire (2-5) of the cable, which is suitable for when the scintillation detector (2-1) operates at positive high voltage.

8. The self-test method of a scintillation detection system with a self-test path status function according to claim 7, characterized in that: The withstand voltage parameter of the capacitor unit is greater than 1.5 times the operating voltage of the scintillation detector (2-1).

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