Counter tube for ionizing radiation detection, isolated detection device and power supply system

Abstract

The present invention discloses a counter tube, an isolated detection device and a power supply system for ionizing radiation detection. The counter tube for ionizing radiation detection includes: a first counter tube, the first counter tube includes a first cathode tube, a mica sheet, a first isolation plate and a first anode wire, both ends of the first cathode tube are connected to the mica sheet, the first isolation plate is disposed in the through hole of the first cathode tube, and the first end of the first anode wire passes through the first isolation plate and extends into the first cathode tube; a second counter tube, the second counter tube includes a second cathode tube, a second isolation plate and a second anode wire, the second isolation plate is disposed in the through hole of the second cathode tube, and the first end of the second anode wire passes through the second isolation plate and extends into the second cathode tube. The counter tube for ionizing radiation detection provided by this application can achieve precise detection of specific ionizing rays.

Description

Technical Field

[0001] The present invention relates to electrical basic devices, and more particularly, to a counter tube, an isolation detection device and a power supply system for ionizing radiation detection. Background Art

[0002] As some radioactive elements are harmful to the human body, such as uranium, thorium or radon, etc., and radon is a gaseous radioactive element. The α particles of radon gas, that is, helium nuclei, carry two positive charges and have very strong ionization ability. Moreover, when a person inhales radon into the lungs, it will cause internal irradiation, which is one of the factors causing lung cancer. At present, the existing radon gas sensors usually adopt sensors based on the ionization chamber scheme, but such sensors are more vulnerable to electromagnetic interference. Summary of the Invention

[0003] An object of the present invention is to provide a counter tube, an isolation detection device and a power supply system for ionizing radiation detection.

[0004] According to a first aspect of the present invention, there is provided a counter tube for ionizing radiation detection, the counter tube for ionizing radiation detection comprising:

[0005] A first counter tube, the first counter tube comprising a first cathode tube, a mica sheet, a first isolation plate and a first anode wire. Both ends of the first cathode tube are connected to the mica sheet. The first isolation plate is disposed in a through hole of the first cathode tube. A first end of the first anode wire passes through the first isolation plate and extends into the first cathode tube;

[0006] A second counter tube, the second counter tube comprising a second cathode tube, a second isolation plate and a second anode wire. The second isolation plate is disposed in a through hole of the second cathode tube. A first end of the second anode wire passes through the second isolation plate and extends into the second cathode tube;

[0007] Wherein, a connection end of a second end of the first anode wire and a second end of the second anode wire serves as a positive pole of a power connection end of the counter tube for ionizing radiation detection, and a connection end of the first cathode tube and the second cathode tube serves as a negative pole of the power connection end of the counter tube for ionizing radiation detection.

[0008] Optionally, the counter tube for ionizing radiation detection further comprises an amplification circuit, a sampling and filtering circuit and a control circuit;

[0009] A first end of the amplification circuit is connected to a second end of the first anode wire, a first end of the sampling and filtering circuit is connected to a second end of the second anode wire, and a second end of the amplification circuit and a second end of the sampling and filtering circuit are respectively connected to the control circuit;

[0010] The control circuit is configured to: determine the target generation quantity of specific rays within the target time in response to a first ray signal output by the amplification circuit within the target time and a second ray signal output by the sampling and filtering circuit within the target time.

[0011] Optionally, the counter tube for ionizing radiation detection further includes a first filter capacitor, and the first filter capacitor is disposed between the second end of the first anode wire and the amplification circuit.

[0012] Optionally, the sampling and filtering circuit includes a second filter capacitor, a first filter resistor, a first sampling resistor, and a second sampling resistor;

[0013] Wherein, the connection point of the first end of the first sampling resistor and the first end of the second sampling resistor is connected to the second end of the second anode wire, the connection point of the second end of the first sampling resistor and the first end of the first filter resistor is connected to the control circuit, the second filter capacitor is connected across the first filter resistor, and the connection point of the second end of the first filter resistor and the second end of the second sampling resistor is connected to the ground end of the counter tube for ionizing radiation detection.

[0014] Optionally, the control circuit is configured to: determine a first generation quantity reflected by the first ray signal and a second generation quantity reflected by the second ray signal in response to the first ray signal output by the amplification circuit within the target time and the second ray signal output by the sampling and filtering circuit within the target time; determine the difference between the first generation quantity and the second generation quantity as the target generation quantity of specific rays within the target time.

[0015] Optionally, the first counter tube is a mica window counter tube, and the second counter tube is a Geiger counter tube.

[0016] According to a second aspect of the present invention, an isolated detection device is provided, and the isolated detection device includes:

[0017] A shielding container;

[0018] A counter tube for ionizing radiation detection, which is the counter tube for ionizing radiation detection described in the first aspect, and the counter tube for ionizing radiation detection is disposed within the shielding container.

[0019] A shielding plate is further disposed within the shielding container, the shielding plate is located between the air inlet hole of the shielding container and the counter tube for ionizing radiation detection, and a first spacing distance between the shielding plate and the air inlet hole of the shielding container is less than a second spacing distance between the shielding plate and the counter tube for ionizing radiation detection.

[0020] According to a third aspect of the present invention, a power supply system is provided, and the power supply system includes:

[0021] A counter tube for ionizing radiation detection, the counter tube for ionizing radiation detection being the counter tube for ionizing radiation detection described in the first aspect, and the counter tube for ionizing radiation detection further includes an amplification circuit, a sampling and filtering circuit, and a control circuit; a first end of the amplification circuit is connected to a second end of the first anode wire, a first end of the sampling and filtering circuit is connected to a second end of the second anode wire, and a second end of the amplification circuit and a second end of the sampling and filtering circuit are respectively connected to the control circuit;

[0022] A first conversion unit, a first end of the first conversion unit is connected to a positive pole of a power connection end of the counter tube for ionizing radiation detection;

[0023] A second conversion unit, a first end of the second conversion unit is connected to a power supply end of the control circuit;

[0024] A power supply unit, a first end of the power supply unit is connected to a second end of the first conversion unit, and a second end of the power supply unit is connected to a second end of the second conversion unit.

[0025] Optionally, the first conversion unit includes a first boost circuit and a second boost circuit;

[0026] Wherein, a first end of the first boost circuit is connected to a first end of the power supply unit, a second end of the first boost circuit is connected to a first end of the second boost circuit, and a second end of the second boost circuit is connected to a positive pole of a power connection end of the counter tube for ionizing radiation detection.

[0027] According to an embodiment of the present disclosure, the counter tube for ionizing radiation detection provided in the present application can be composed of a first counter tube and a second counter tube. By configuring the first counter tube with mica sheets, X, γ, α, and β rays can be detected. By configuring only the second counter tube with a second cathode tube, X, γ, and β rays can be detected. The first counter tube and the second counter tube cooperate with each other to be able to more accurately detect α rays in radon gas and are not easily affected by electromagnetic interference.

[0028] Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0030] Figure 1 It is a schematic structural diagram of an isolated detection device according to an embodiment of the present application.

[0031] Figure 2 It is a schematic structural diagram of another isolated detection device according to an embodiment of the present application.

[0032] Figure 3 It is a schematic structural diagram of a counter tube for ionizing radiation detection according to an embodiment of the present application.

[0033] Figure 4 It is a schematic structural diagram of a power supply system according to an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Power supply unit; 2. Second conversion circuit; 3. First boost circuit; 4. Second boost circuit; 6. Second counter tube; 61. Second cathode tube; 62. Second isolation plate; 63. Second anode wire; 11. Control circuit; 14. First counter tube; 141. First cathode tube; 142. Mica sheet; 143. First isolation plate; 144. First anode wire; 15. Amplification circuit; 20. Sampling and filtering circuit; 200. Shielding container; 210. Air inlet; 211. Shielding plate; 212. Support part; 213. Transition part; 214. Connection part; 300. Power supply. Detailed implementation manners

[0036] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present invention, its application, or its use.

[0038] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description.

[0039] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0040] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] The present application provides a counter tube for ionizing radiation detection. The counter tube for ionizing radiation detection includes:

[0042] A first counter tube 14, which includes a first cathode tube 141, a mica sheet 142, a first separator 143, and a first anode wire 144. Both ends of the first cathode tube 141 are connected to the mica sheet 142. The first separator 143 is disposed in the through hole of the first cathode tube 141. The first end of the first anode wire 144 passes through the first separator 143 and extends into the first cathode tube 141;

[0043] A second counter tube 6, which includes a second cathode tube 61, a second separator 62, and a second anode wire 63. The second separator 62 is disposed in the through hole of the second cathode tube 61. The first end of the second anode wire 63 passes through the second separator 62 and extends into the second cathode tube 61;

[0044] Wherein, the connection end of the second end of the first anode wire 144 and the second end of the second anode wire 63 serves as the positive electrode of the power connection end of the counter tube for ionizing radiation detection, and the connection end of the first cathode tube 141 and the second cathode tube 61 serves as the negative electrode of the power connection end of the counter tube for ionizing radiation detection.

[0045] In this embodiment, as Figure 1 shown, the positive electrode of the power connection end of the counter tube for ionizing radiation detection can be connected to the positive electrode of the power supply 300, and the negative electrode of the power connection end of the counter tube for ionizing radiation detection can be connected to the negative electrode of the power supply 300. The power supply 300 can provide a 900V charge pump.

[0046] In this embodiment, the first counter tube 14 can be a mica window counter tube. The mica sheet 142 of the first counter tube 14 can be an ultra-thin mica sheet. This ultra-thin mica sheet serves as a detection window, enabling α-rays with relatively weak penetration performance to enter the anode inside the mica window counter tube. When radon gas undergoes α decay on the surface of the mica sheet 142, the charges ionized by the α-rays are received by the anode of the ionization chamber with a 900V high-voltage bias, generating a pulse current. After being amplified by the subsequent amplifier circuit 15, a counting pulse signal, that is, the first ray signal within the target time, can be generated. Since X, γ, α, and β rays all have strong ionization and penetration effects, multiple counting pulse signals of X, γ, α, and β will be generated when this circuit operates. For example, Figure 3 shown, CPS = 9 can represent that 9 ionization signals are detected within 1 second. At this time, through the CPS count value, the number of ionizing radiation decays can be reflected. When the radon gas concentration increases, the CPS count value will also increase, thereby reflecting the level of the radon concentration in the surrounding environment.

[0047] In this embodiment, the second counter tube 6 can be a Geiger counter tube, which is configured to prevent alpha rays from penetrating through the second cathode metal tube of the Geiger counter tube, so as to only detect X, γ, and β rays.

[0048] In some embodiments, the counter tube for ionizing radiation detection further includes an amplifier circuit 15, a sampling and filtering circuit 20, and a control circuit 11;

[0049] The first end of the amplifier circuit 15 is connected to the second end of the first anode wire 144, the first end of the sampling and filtering circuit 20 is connected to the second end of the second anode wire 63, and the second ends of the amplifier circuit 15 and the sampling and filtering circuit 20 are respectively connected to the control circuit 11;

[0050] The control circuit 11 is configured to: in response to the first ray signal output by the amplifier circuit 15 within the target time and the second ray signal output by the sampling and filtering circuit 20 within the target time, determine the target generation quantity of specific rays within the target time.

[0051] In some embodiments, as Figure 4 shown, the counter tube for ionizing radiation detection further includes a first filter capacitor C12, and the first filter capacitor C12 is disposed between the second end of the first anode wire 144 and the amplifier circuit 15.

[0052] In this embodiment, as Figure 4 shown, the first end of the first filter capacitor C12 is connected to the second end of the first anode wire 144 of the first counter tube 14, and the second end of the first filter capacitor C12 is connected to the first end of the amplifier circuit 15. By providing the first filter capacitor C12, the first ray signal output by the first counter tube 14 can be made more stable.

[0053] In some embodiments, as Figure 4 shown, the sampling and filtering circuit 20 includes a second filter capacitor C10, a first filter resistor R9, a first sampling resistor R8, and a second sampling resistor R7;

[0054] Among them, the connection point of the first end of the first sampling resistor R8 and the first end of the second sampling resistor R7 is connected to the second end of the second anode wire 63, the connection point of the second end of the first sampling resistor R8 and the first end of the first filter resistor R9 is connected to the control circuit 11, the second filter capacitor C10 is connected across the first filter resistor R9, and the connection point of the second end of the first filter resistor R9 and the second end of the second sampling resistor R7 is connected to the ground terminal of the counter tube for ionizing radiation detection.

[0055] In this embodiment, as Figure 4As shown, by setting the second filter capacitor C10, the first filter resistor R9, the first sampling resistor R8, and the second sampling resistor R7, the second ray signal can be regularized to match the first ray signal, effectively achieving the accuracy of the determined target production quantity.

[0056] In some embodiments, the control circuit 11 is configured to: in response to the first ray signal within the target time output by the amplification circuit 15 and the second ray signal within the target time output by the sampling and filtering circuit 20, determine the first production quantity reflected by the first ray signal and the second production quantity reflected by the second ray signal; determine the difference between the first production quantity and the second production quantity as the target production quantity of the specific ray within the target time.

[0057] In this embodiment, as Figure 3 shown, the first ray signal within the target time output by the amplification circuit 15 is represented as CPS = 9, and the second ray signal within the target time output by the sampling and filtering circuit 20 is represented as CPS = 3. The difference can be obtained by pulse subtraction calculation inside the control circuit 11 as the α count output CPS = 6, that is, the specific ray is the α ray, and the target production quantity of the specific ray within the target time is 6. Through this pulse subtraction, the α decay generated by radon gas can be screened out by pulse subtraction calculation.

[0058] This application also provides an isolation detection device, as Figure 1 shown, the isolation detection device includes:

[0059] A shielding container 200;

[0060] A counter tube for ionizing radiation detection, and the counter tube for ionizing radiation detection is the counter tube for ionizing radiation detection in any of the above embodiments, and the counter tube for ionizing radiation detection is disposed inside the shielding container 200.

[0061] In this embodiment, as Figure 1 shown, the shielding container 200 can be made of lead to detect α rays in the environment under a high ionizing radiation environment. By setting the shielding container 200, the ionizing radiation inside the shielding container 200 can be processed in a low background state, and through the air inlet hole 210 opened at the top of the shielding container 200, radon gas can enter the shielding container 200 and block a part of X, γ, β from entering.

[0062] In some embodiments, a shielding plate 211 is further disposed inside the shielding container 200. The shielding plate 211 is located between the air inlet hole 210 of the shielding container 200 and the counter tube for ionizing radiation detection, and the first spacing distance between the shielding plate 211 and the air inlet hole 210 of the shielding container 200 is less than the second spacing distance between the shielding plate 211 and the counter tube for ionizing radiation detection.

[0063] In this embodiment, the shielding plate 211 can be fixed within the shielding container 200, and by providing the shielding plate 211, the "inlet maze" effect can be achieved, further blocking a portion of X, γ, β from entering.

[0064] In some embodiments, such as Figure 1 shown, the shielding plate 211 can be a straight plate.

[0065] In some embodiments, to further block more X, γ, β from entering, such as Figure 2 shown, the shielding plate 211 can include a plurality of sequentially connected plate groups. Each plate group includes two support portions 212, two connection portions 214, and a transition portion 213. One end of one support portion 212 is fixedly connected to one end of one connection portion 214. The other end of one connection portion 214 is connected to one end of the transition portion 213. The other end of the transition portion 213 is connected to one end of the other connection portion 214. The other end of the other connection portion 214 is fixedly connected to one end of the other support portion 212. And adjacent plate groups can be fixedly connected through the support portions 212 of the adjacent plate groups.

[0066] In this embodiment, the support portion 212 can be a straight plate. The cross-section of the connection portion 214 is a right triangle, and one right side of the connection portion 214 is fixedly connected to the support portion 212. The hypotenuse of the connection portion 214 faces the air inlet 210 of the shielding container 200. The other right side of the connection portion 214 is fixedly connected to the transition portion 213. The surface of the transition portion 213 facing the air inlet 210 of the shielding container 200 is a curved surface. By providing the transition portion 213, more X, γ, β rays can be blocked. By providing the connection portion 214, the situation of α rays being blocked can be effectively reduced while blocking more X, γ, β rays.

[0067] This application also provides a power supply system, such as Figure 4 shown, the power supply system includes:

[0068] A counter tube for ionizing radiation detection. The counter tube for ionizing radiation detection is the counter tube for ionizing radiation detection in any of the above embodiments. The counter tube for ionizing radiation detection further includes an amplifier circuit 15, a sampling and filtering circuit 20, and a control circuit 11. The first end of the amplifier circuit 15 is connected to the second end of the first anode wire 144. The first end of the sampling and filtering circuit 20 is connected to the second end of the second anode wire 63. The second ends of the amplifier circuit 15 and the sampling and filtering circuit 20 are respectively connected to the control circuit 11.

[0069] The first conversion unit, the first end of the first conversion unit is connected to the positive pole of the power supply connection terminal of the counter tube for ionizing radiation detection;

[0070] The second conversion unit, the first end of the second conversion unit is connected to the power supply terminal of the control circuit 11;

[0071] The power supply unit 1, the first end of the power supply unit 1 is connected to the second end of the first conversion unit, and the second end of the power supply unit 1 is connected to the second end of the second conversion unit.

[0072] In this embodiment, the power supply unit 1 can be a 3.7V lithium battery, the second conversion unit can convert the 3.7V lithium battery into a 113V DC high voltage and output it to the first conversion unit, and the first conversion unit can convert the 113V DC high voltage into a 900V charge pump and output it to the positive pole of the power supply connection terminal of the counter tube for ionizing radiation detection.

[0073] In this embodiment, a twelfth resistor R12 is provided between the first counter tube 14 and the first conversion unit, and a fifth resistor R5 is provided between the second counter tube 6 and the first conversion unit, so that the 900V charge pump generates a 900V high voltage to provide a bias voltage to the second counter tube 6 through the fifth resistor R5 and to the first counter tube 14 through the twelfth resistor R12. When there is ionizing radiation, the first counter tube 14 and the second counter tube 6 respectively generate counting pulses with different counts, and the counting pulses of the first counter tube 14 and the second counter tube 6 are input into the control unit through the amplifier circuit 15 and the sampling and filtering circuit 20 for subtraction counting.

[0074] In some embodiments, the first conversion unit includes a first boost circuit 3 and a second boost circuit 4;

[0075] Wherein, the first end of the first boost circuit 3 is connected to the first end of the power supply unit 1, the second end of the first boost circuit 3 is connected to the first end of the second boost circuit 4, and the second end of the second boost circuit 4 is connected to the positive pole of the power supply connection terminal of the counter tube for ionizing radiation detection.

[0076] In this embodiment, by setting the first boost circuit 3 and the second boost circuit 4, the stability of the power supply system for supplying power to the counter tube for ionizing radiation detection and the control circuit 11 is effectively improved.

[0077] In this embodiment, the control circuit 11 may be a control chip. The communication terminal of the control chip is connected to the communication terminal of the second conversion circuit 2, and the power supply terminal of the control chip is connected to the output terminal of the second conversion circuit 2, so that the second conversion circuit 2 can obtain the 3.7V direct current output by the power supply unit 1. Moreover, the second conversion circuit 2 converts the 3.7V direct current into a direct current meeting the requirements of the control unit and outputs it to the control unit. After the control unit is powered on, it can control whether the second conversion circuit 2 enters the standby mode. In the standby mode, the second conversion circuit 2 supplies power to the control chip after an interval of a first set duration. In the working mode, the second conversion circuit 2 supplies power to the control chip after an interval of a second set duration. Herein, the first set duration is greater than the second set duration, and both the first set duration and the second set duration are set manually and are not limited herein.

[0078] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A counter tube for ionizing radiation detection, characterized in that, The counter tube for ionizing radiation detection includes: A first counter tube, which includes a first cathode tube, a mica sheet, a first separator, and a first anode wire. Both ends of the first cathode tube are connected to the mica sheet. The first separator is disposed in the through hole of the first cathode tube, and the first end of the first anode wire passes through the first separator and extends into the first cathode tube; A second counter tube, which includes a second cathode tube, a second separator, and a second anode wire. The second separator is disposed in the through hole of the second cathode tube, and the first end of the second anode wire passes through the second separator and extends into the second cathode tube; Wherein, the connection end of the second end of the first anode wire and the second end of the second anode wire serves as the positive pole of the power connection end of the counter tube for ionizing radiation detection, and the connection end of the first cathode tube and the second cathode tube serves as the negative pole of the power connection end of the counter tube for ionizing radiation detection.

2. The counting tube for ionizing radiation detection according to claim 1, wherein The counter tube for ionizing radiation detection further includes an amplification circuit, a sampling and filtering circuit, and a control circuit; The first end of the amplification circuit is connected to the second end of the first anode wire, the first end of the sampling and filtering circuit is connected to the second end of the second anode wire, and the second ends of the amplification circuit and the sampling and filtering circuit are respectively connected to the control circuit; The control circuit is configured to: in response to the first ray signal output by the amplification circuit within a target time and the second ray signal output by the sampling and filtering circuit within the target time, determine the target generation quantity of a specific ray within the target time; the specific ray is an α ray.

3. The counting tube for ionizing radiation detection according to claim 2, characterized in that, The counter tube for ionizing radiation detection further includes a first filter capacitor, which is disposed between the second end of the first anode wire and the amplification circuit.

4. The counting tube for ionizing radiation detection according to claim 2, characterized in that, The sampling and filtering circuit includes a second filter capacitor, a first filter resistor, a first sampling resistor, and a second sampling resistor; Wherein, the connection point of the first end of the first sampling resistor and the first end of the second sampling resistor is connected to the second end of the second anode wire, the connection point of the second end of the first sampling resistor and the first end of the first filter resistor is connected to the control circuit, the second filter capacitor is connected across the first filter resistor, and the connection point of the second end of the first filter resistor and the second end of the second sampling resistor is connected to the ground end of the counter tube for ionizing radiation detection.

5. The counter tube for ionizing radiation detection according to claim 2, characterized in that, The control circuit is configured to: in response to the first ray signal output by the amplification circuit within a target time and the second ray signal output by the sampling and filtering circuit within the target time, determine the first generation quantity reflected by the first ray signal and the second generation quantity reflected by the second ray signal; Determine the difference between the first generation quantity and the second generation quantity as the target generation quantity of the specific ray within the target time.

6. The counter tube for ionizing radiation detection according to claim 1, characterized in that, The first counter tube is a mica window counter tube, and the second counter tube is a Geiger counter tube.

7. An isolation detection device, characterized in that, The isolated detection device includes: A shielding container; A counter tube for ionizing radiation detection, where the counter tube for ionizing radiation detection is the counter tube for ionizing radiation detection described in any one of claims 1-6, and the counter tube for ionizing radiation detection is disposed within the shielding container.

8. The isolation detection device according to claim 7, characterized in that A shielding plate is further disposed within the shielding container, the shielding plate being located between the air inlet hole of the shielding container and the counter tube for ionizing radiation detection, and a first spacing distance between the shielding plate and the air inlet hole of the shielding container is less than a second spacing distance between the shielding plate and the counter tube for ionizing radiation detection.

9. A power supply system, characterized in that, The power supply system includes: A counter tube for ionizing radiation detection, where the counter tube for ionizing radiation detection is the counter tube for ionizing radiation detection described in any one of claims 1-6, and the counter tube for ionizing radiation detection further includes an amplification circuit, a sampling and filtering circuit, and a control circuit; a first end of the amplification circuit is connected to a second end of the first anode wire, a first end of the sampling and filtering circuit is connected to a second end of the second anode wire, and a second end of the amplification circuit and a second end of the sampling and filtering circuit are respectively connected to the control circuit; A first conversion unit, a first end of the first conversion unit being connected to the positive pole of the power connection terminal of the counter tube for ionizing radiation detection; A second conversion unit, a first end of the second conversion unit being connected to the power supply terminal of the control circuit; A power supply unit, a first end of the power supply unit being connected to a second end of the first conversion unit, and a second end of the power supply unit being connected to a second end of the second conversion unit.

10. The power supply system according to claim 9, wherein The first conversion unit includes a first boost circuit and a second boost circuit; Wherein, a first end of the first boost circuit is connected to a first end of the power supply unit, a second end of the first boost circuit is connected to a first end of the second boost circuit, and a second end of the second boost circuit is connected to the positive pole of the power connection terminal of the counter tube for ionizing radiation detection.

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