CN215067330U - Detector for accurately searching surface radiation pollution position - Google Patents
Detector for accurately searching surface radiation pollution position Download PDFInfo
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- CN215067330U CN215067330U CN202121220790.6U CN202121220790U CN215067330U CN 215067330 U CN215067330 U CN 215067330U CN 202121220790 U CN202121220790 U CN 202121220790U CN 215067330 U CN215067330 U CN 215067330U
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Abstract
The utility model relates to a detector for accurately searching the surface radiation pollution position, belonging to the nuclear radiation detection field; the technical scheme is that the detector capable of accurately searching the surface radiation pollution position comprises the following components: the detector comprises a detector shell, an anode wire assembly, an incidence window and an insulating column; the detector shell is upper end open-ended square shell, be provided with a plurality of positive pole silk subassemblies in the detector shell, a plurality of positive pole silk subassemblies are arranged in proper order on same horizontal plane, and fix mutually through the insulated column between positive pole silk subassembly and the detector shell, and it is insulating between the positive pole silk subassembly, detector shell upper end opening covers there is the entrance window.
Description
Technical Field
The utility model relates to a detector of accurate searching surface radiation pollution position belongs to nuclear radiation detection field.
Background
At present, the technology of surface radiation intensity monitoring is well developed. The application field relates to nuclear power, workpiece flaw detection and medical radiography and the like, and after equipment which works by adopting the radioactive characteristic is used, workers need to monitor surface radiation pollution, so that the problem that the body is diseased due to the fact that radioactive substances are attached to the surface of clothes or skin is solved.
The current detectors mainly include: a proportional counter, a scintillation detector and a semiconductor detector; although various detectors have different working principles and have deviation in detection precision, the radioactive pollution intensity can be integrally monitored, and then whether the position of a worker or the position near an object is safe or not is reminded, so that a guidance scheme is provided for next measures.
However, the current detector can only monitor the detection surface for radioactive contamination, namely: radioactivity is monitored only over the detector detection area and cannot be relatively accurately indicated for the location of contamination and for the intensity of radioactivity between different locations within the area. The defect is not beneficial to workers to quickly clean the radioactive substances, and on the other hand, the defect is not beneficial to researching the leakage path and trace of the radioactive substances in the later period.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a can accurate detector of looking for surface radiation pollution position.
In order to realize the technical purpose, the utility model discloses a proportional counter's basic principle provides following technical scheme:
a detector for accurately locating a radiation contamination of a surface, comprising: the detector comprises a detector shell, an anode wire assembly, an incidence window and an insulating column; the detector shell is upper end open-ended square shell, be provided with a plurality of positive pole silk subassemblies in the detector shell, a plurality of positive pole silk subassemblies are arranged in proper order on same horizontal plane, and fix mutually through the insulated column between positive pole silk subassembly and the detector shell, and it is insulating between the positive pole silk subassembly, detector shell upper end opening covers there is the entrance window.
The anode wire assembly comprises anode wires which are bent for multiple times on the same horizontal plane, and the anode wires are not overlapped.
The insulation column comprises a fixed insulation column and a shielding insulation column, the fixed insulation column is a cylinder made of an insulation material, the fixed insulation column is fixed at the bottom of the shell of the detector shell, and the upper part of the fixed insulation column is fixed with an anode wire of the anode wire assembly;
the shield insulating column includes: the anode wire comprises an anode wire through hole, a shielding shell and an insulating shell, wherein the insulating shell is integrally of a columnar structure, a through hole is formed in the insulating shell along the axis direction of the insulating shell, the through hole is the anode wire through hole, the shielding shell is arranged in the pipe wall of the insulating shell, and the shielding shell is a metal net or a metal pipe.
The lower end of the shielding insulating column is coaxially fixed with a cylindrical clamping table which is of a tubular structure, and the outer diameter of the cylindrical clamping table is larger than that of the shielding insulating column.
The upper end of the shielding shell is completely wrapped by the shielding insulating column, the lower end of the shielding shell extends to the outside of the cylindrical clamping table from the lower end of the shielding insulating column, and the shielding shell is grounded.
And the anode wire in the anode wire assembly extends out of the cylindrical clamping table pipe from the anode wire through hole and is electrically connected with the processing module.
The projection of the shielding insulating column on the horizontal plane is superposed with the central point of the projection of the anode wire component on the horizontal plane.
The processing module comprises: the system comprises a main control chip, a partition chip and a processing circuit; the signal end of each anode wire assembly is electrically connected with one processing circuit, the processing circuits of the adjacent anode wire assemblies are electrically connected with one partition chip, and the main control chip is connected with the partition chips in series.
The processing circuit includes: the signal end of the anode wire component is connected with the input end of the corresponding signal amplification circuit, the output end of the signal amplification circuit is connected with the ADC conversion circuit, and the output end of the ADC conversion circuit is connected with the partition chip corresponding to the ADC conversion circuit.
The detector of accurate surface radiation pollution position of looking for still includes the power, the power includes: high voltage power supply and working power supply, high voltage power supply does: the input end of the transformer is connected with AC220V, the output end of the transformer is connected with a rectifier, the rectifier is connected with a high-voltage stabilizer, the anode of the output end of the high-voltage stabilizer is connected with a resistor R in series and then connected with a plurality of anode wire assemblies, and the cathode of the high-voltage stabilizer is connected with a detector shell;
the working power supply is as follows: the power supply module is connected with an AC220V power supply, the power supply module outputs a DC5V power supply, the output end of the power supply module is connected with a voltage stabilizing circuit, the voltage stabilizing circuit outputs a DC3.3V power supply, and the working power supply supplies power for the working of the processing module.
The signal amplifying circuit comprises an operational amplifier QA, the anode wire 32 is connected with one end of a resistor RB17, the other end of the resistor RB17 is connected with one end of a resistor RB13 and the inverting input end of the operational amplifier QA in parallel, the positive phase input end of the operational amplifier QA is connected with the resistor RB25 in series and then is grounded, the other end of the resistor RB13 is connected with the output end of the operational amplifier QA, the positive power supply of the operational amplifier QA is connected with a power supply end of VDD, the negative power supply of the operational amplifier QA is connected with a power supply end of VDD, the connection point of the output end of the operational amplifier QA and the resistor RB13 is also connected with one end of a resistor RB18, one end of the resistor RB18 is connected with the non-inverting input end of the operational amplifier QB, the inverting input end of the operational amplifier QB is connected with the resistor RB23 and the resistor RB24 in parallel, the other end of the resistor RB23 is grounded, the other end of the resistor RB24 is connected with the output end of the operational amplifier QB and one end of the capacitor CB9, and the capacitor CB9 is connected with the resistor RB21 and then is grounded.
A filter circuit is arranged between the anode wire 32 and the resistor RB17, and the filter circuit is as follows: one end of a capacitor CB8 is connected with the anode wire 32, the other end of the capacitor CB8 is connected with the cathode of a transient suppression diode DB1, and the anode of the transient suppression diode VTS is grounded.
The ADC conversion circuit comprises an alpha comparison circuit and a beta comparison circuit, wherein the alpha comparison circuit is as follows:
one end of a resistor R30 is connected with a connecting point of a QA output end of the operational amplifier and a resistor RB13, the other end of the resistor R30 is connected with a positive input end of a voltage comparator U5 and one end of a resistor R39, the other end of the resistor R39 is grounded, a negative input end of the voltage comparator U5 is connected with one end of a resistor R36, the other end of the resistor R36 is connected with a capacitor C21, a resistor R41 and a resistor R38 in parallel, the other end of the capacitor C21 and the other end of the resistor R41 are grounded, the other end of the resistor R38 is connected with a singlechip, an output end of the voltage comparator U5 is connected with a resistor R32, the resistor R32 is connected with a positive power end of the voltage comparator U5 and a DC5V power supply, a negative power end of the voltage comparator U5 is grounded, a connecting point of the output end of the voltage comparator U5 and a connecting point of the resistor R32 is an alpha comparison circuit output end, and the alpha comparison circuit is connected with the singlechip;
the beta comparison circuit is as follows: one end of a resistor R14 is connected with a connection point of a capacitor CB9 and a resistor RB21, the other end of the resistor R14 is connected with a positive input end of a voltage comparator U4 and a resistor R22, the other end of the resistor R22 is grounded, the negative input end of the voltage comparator U4 is connected with the resistor R16, the other end of the resistor R16 is connected with the capacitor C17 and a single chip microcomputer, the other end of the capacitor C17 is grounded, the output end of the voltage comparator U4 is connected with a resistor R13, the resistor R13 is connected with the positive power supply end of the voltage comparator U4 and a DC5V power supply, the negative power supply end of the voltage comparator U4 is grounded, the connection point of the output end of the voltage comparator U4 and the connection point of the resistor R13 is the output end of a beta comparison circuit, and the output end of the beta comparison circuit is connected with the single chip microcomputer.
The main control chip and the partition chip are both single-chip microcomputers, and the single-chip microcomputers adopt STM373CCT 6.
Compared with the prior art, the utility model following beneficial effect has:
one, the utility model discloses a plurality of positive pole silk subassemblies, every positive pole silk subassembly all can participate in alpha ray or beta ray's detection, and then improves whole detection precision, and the comparison between the positive pole silk subassembly monitoring intensity simultaneously can infer radioactive substance attachment position through calculating, provides accurate guide for the staff.
The utility model adopts a plurality of anode wire components, each anode wire component can participate in the detection of alpha rays or beta rays, so as to improve the overall detection accuracy, and meanwhile, the anode wire components are connected with the same power supply and are positioned in the same gas environment, the influence of external factors is small in the detection process, and the detection data is uniform and accurate; in addition, the shielding shell can shield the electric field interference of the vertically arranged anode wire in the anode wire assembly, so that the detection precision is ensured.
Thirdly, the utility model adopts a partition chip, which is convenient for a plurality of anode wire components to be electrically connected with a processing chip and for the rapid and accurate processing of data; on the other hand, data provided by the anode wire assembly are processed by the partition chip, the main control chip continues to provide processing data for different anode wire assemblies for comprehensive processing, the processing speed can be improved, and potential is provided for improving the precision of a detector for accurately searching a surface radiation pollution position.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic cross-sectional view of the present invention.
Fig. 3 is a schematic cross-sectional view of the shielding insulating column of the present invention.
Fig. 4 is a schematic cross-sectional view of a-a in fig. 3 according to the present invention.
Fig. 5 is a circuit diagram of the connection between the high voltage power supply and the detector housing and the anode wire assembly.
Fig. 6 is a circuit diagram of the signal amplification circuit of the present invention.
Fig. 7 is an α comparison circuit diagram of the present invention.
Fig. 8 is a beta comparison circuit diagram of the present invention.
In the figure: 1 is the detector shell, 2 is the anode wire subassembly, 3 is the incident window, 4 is the insulated column, 41 is fixed insulated column, 42 is shielding insulated column, 421 is the signal line through-hole, 422 is shielding shell, 423 is insulating shell, 424 is the cylinder ka tai.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the following examples and embodiments, taken in conjunction with the accompanying drawings:
as shown in fig. 1 to 8: a detector of accurate searching surface radiation pollution position, include: the detector comprises a detector shell 1, an anode wire assembly 2, an entrance window 3 and an insulating column 4; detector shell 1 is upper end open-ended square shell, be provided with a plurality of positive pole silk subassemblies 2 in the detector shell 1, a plurality of positive pole silk subassemblies 2 are arranged in proper order on same horizontal plane, and fix mutually through insulated column 4 between positive pole silk subassembly 2 and the detector shell 1, and it is insulating between the positive pole silk subassembly 2, 1 upper end opening covers of detector shell has entrance window 3.
The anode wire assembly 2 comprises anode wires which are bent for multiple times on the same horizontal plane, and the anode wires are not overlapped.
The insulating column comprises a fixed insulating column 41 and a shielding insulating column 42, the fixed insulating column 41 is a cylinder made of insulating materials, the fixed insulating column 41 is fixed at the bottom of the shell of the detector shell 1, and the upper part of the fixed insulating column 41 is fixed with the anode wire of the anode wire component 2;
the shield insulating column 42 includes: anode wire through-hole 421, shielding shell 422 and insulating shell 423, insulating shell 423 is whole to be the columnar structure, and insulating shell 423 is gone up and is provided with the through-hole along its axis direction, the through-hole is anode wire through-hole 421, be provided with shielding shell 422 in insulating shell 423's the pipe wall, shielding shell 422 is metal mesh or tubular metal resonator.
The lower end of the shielding insulating column 42 is coaxially fixed with a cylindrical clamping table 424, the cylindrical clamping table 424 is of a tubular structure, and the outer diameter of the cylindrical clamping table 424 is larger than that of the shielding insulating column 42.
The upper end of the shielding shell 422 is completely wrapped by the shielding insulation column 42, the lower end of the shielding shell 422 extends from the lower end of the shielding insulation column 42 to the outside of the cylindrical clamping table 424, and the shielding shell 422 is grounded.
The anode wire in the anode wire assembly 2 extends out of the cylindrical clamping table 424 from the anode wire through hole 421 and is electrically connected with the processing module.
The projection of the shielding insulating column 42 on the horizontal plane coincides with the central point of the projection of the anode wire assembly 2 on the horizontal plane.
The processing module comprises: the system comprises a main control chip, a partition chip and a processing circuit; the signal end of each anode wire assembly 2 is electrically connected with one processing circuit, the processing circuits of the adjacent anode wire assemblies 2 are electrically connected with one partition chip, and the main control chip is connected with the partition chips in series.
The processing circuit includes: the signal end of the anode wire component 2 is connected with the input end of the signal amplification circuit corresponding to the anode wire component, the output end of the signal amplification circuit is connected with the ADC conversion circuit, and the output end of the ADC conversion circuit is connected with the partition chip corresponding to the ADC conversion circuit.
The detector of accurate surface radiation pollution position of looking for still includes the power, the power includes: high voltage power supply and working power supply, high voltage power supply does: the input end of the transformer is connected with AC220V, the output end of the transformer is connected with a rectifier, the rectifier is connected with a high-voltage stabilizer, the anode of the output end of the high-voltage stabilizer is connected with a plurality of anode wire assemblies 2 after being connected with a resistor R in series, and the cathode of the high-voltage stabilizer is connected with a detector shell 1;
the working power supply is as follows: the power supply module is connected with an AC220V power supply, the power supply module outputs a DC5V power supply, the output end of the power supply module is connected with a voltage stabilizing circuit, the voltage stabilizing circuit outputs a DC3.3V power supply, and the working power supply supplies power for the working of the processing module.
The signal amplifying circuit comprises an operational amplifier QA, the anode wire 32 is connected with one end of a resistor RB17, the other end of the resistor RB17 is connected with one end of a resistor RB13 and the inverting input end of the operational amplifier QA in parallel, the positive phase input end of the operational amplifier QA is connected with the resistor RB25 in series and then is grounded, the other end of the resistor RB13 is connected with the output end of the operational amplifier QA, the positive power supply of the operational amplifier QA is connected with a power supply end of VDD, the negative power supply of the operational amplifier QA is connected with a power supply end of VDD, the connection point of the output end of the operational amplifier QA and the resistor RB13 is also connected with one end of a resistor RB18, one end of the resistor RB18 is connected with the non-inverting input end of the operational amplifier QB, the inverting input end of the operational amplifier QB is connected with the resistor RB23 and the resistor RB24 in parallel, the other end of the resistor RB23 is grounded, the other end of the resistor RB24 is connected with the output end of the operational amplifier QB and one end of the capacitor CB9, and the capacitor CB9 is connected with the resistor RB21 and then is grounded.
A filter circuit is arranged between the anode wire 32 and the resistor RB17, and the filter circuit is as follows: one end of a capacitor CB8 is connected with the anode wire 32, the other end of the capacitor CB8 is connected with the cathode of a transient suppression diode DB1, and the anode of the transient suppression diode VTS is grounded.
The ADC conversion circuit comprises an alpha comparison circuit and a beta comparison circuit, wherein the alpha comparison circuit is as follows:
one end of a resistor R30 is connected with a connecting point of a QA output end of the operational amplifier and a resistor RB13, the other end of the resistor R30 is connected with a positive input end of a voltage comparator U5 and one end of a resistor R39, the other end of the resistor R39 is grounded, a negative input end of the voltage comparator U5 is connected with one end of a resistor R36, the other end of the resistor R36 is connected with a capacitor C21, a resistor R41 and a resistor R38 in parallel, the other end of the capacitor C21 and the other end of the resistor R41 are grounded, the other end of the resistor R38 is connected with a singlechip, an output end of the voltage comparator U5 is connected with a resistor R32, the resistor R32 is connected with a positive power end of the voltage comparator U5 and a DC5V power supply, a negative power end of the voltage comparator U5 is grounded, a connecting point of the output end of the voltage comparator U5 and a connecting point of the resistor R32 is an alpha comparison circuit output end, and the alpha comparison circuit is connected with the singlechip;
the beta comparison circuit is as follows: one end of a resistor R14 is connected with a connection point of a capacitor CB9 and a resistor RB21, the other end of the resistor R14 is connected with a positive input end of a voltage comparator U4 and a resistor R22, the other end of the resistor R22 is grounded, the negative input end of the voltage comparator U4 is connected with the resistor R16, the other end of the resistor R16 is connected with the capacitor C17 and a single chip microcomputer, the other end of the capacitor C17 is grounded, the output end of the voltage comparator U4 is connected with a resistor R13, the resistor R13 is connected with the positive power supply end of the voltage comparator U4 and a DC5V power supply, the negative power supply end of the voltage comparator U4 is grounded, the connection point of the output end of the voltage comparator U4 and the connection point of the resistor R13 is the output end of a beta comparison circuit, and the output end of the beta comparison circuit is connected with the single chip microcomputer.
The main control chip and the partition chip are both single-chip microcomputers, and the single-chip microcomputers adopt STM373CCT 6.
The anode wire is 25 mu m gold-plated tungsten.
The detector shell 1 is made of brass.
The entrance window 3 is a 10 μm titanium foil.
The entrance window 3 seals an opening at the upper end of the detector shell 1, and inert gas is filled in the detector shell 1.
Be provided with the through-hole that is used for installing shielding insulating column 42 on the detector shell 1 shell bottom, just cylinder ka tai 424 is located the detector shell 1 outside, it is sealed through glue between detector shell 1 and the shielding insulating column 42.
The utility model discloses specific embodiment as follows:
when adopting the utility model discloses when surveying radioactive substance, because of its radioactivity characteristic, a plurality of positive pole silk subassemblies 2 produce the ion and receive the signal by the radiation ray ionization, and positive pole silk subassembly 2 that is close to near radioactive substance more receives the signal stronger, from this through singlechip data processing, can judge radioactive substance attachment position, then quick accurate processing. In addition, by judging the precise position where the radioactive substance is attached, scientific researchers can conveniently reversely deduce the reason of the radiation pollution and provide measures for avoiding the problems.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (10)
1. A detector for accurately locating a radiation contamination on a surface, comprising: the detector comprises a detector shell (1), an anode wire assembly (2), an entrance window (3) and an insulating column (4); detector shell (1) is upper end open-ended square shell, be provided with a plurality of positive pole silk subassemblies (2) in detector shell (1), a plurality of positive pole silk subassemblies (2) are arranged in proper order on same horizontal plane, and fix mutually through insulated column (4) between positive pole silk subassembly (2) and detector shell (1), and it is insulating between positive pole silk subassembly (2), detector shell (1) upper end opening cover has entrance window (3).
2. The detector of claim 1, wherein the detector is capable of accurately locating the radiation contamination on the surface: the anode wire assembly (2) comprises anode wires which are bent for multiple times on the same horizontal plane, and the anode wires are not overlapped.
3. The detector of claim 2, wherein the detector is capable of accurately finding the position of the surface radiation pollution: the insulation column (4) comprises a fixed insulation column (41) and a shielding insulation column (42), the fixed insulation column (41) is a cylinder made of an insulation material, the fixed insulation column (41) is fixed at the bottom of the detector shell (1), and the upper part of the fixed insulation column (41) is fixed with an anode wire of the anode wire assembly (2);
the shield insulating post (42) includes: positive pole silk through-hole (421), shielding shell (422) and insulating casing (423), insulating casing (423) wholly is the columnar structure, and insulating casing (423) are gone up and are provided with the through-hole along its axis direction, the through-hole is positive pole silk through-hole (421), be provided with shielding shell (422) in the pipe wall of insulating casing (423), shielding shell (422) are metal mesh or tubular metal resonator.
4. A detector for accurately locating radiation contamination on a surface according to claim 3, wherein: the coaxial cylinder card platform (424) that is fixed with of shielding insulated column (42) lower extreme, cylinder card platform (424) are the tubular structure, cylinder card platform (424) external diameter is greater than shielding insulated column (42) external diameter.
5. The detector of claim 4, wherein the detector is capable of accurately finding the position of the surface radiation pollution: the upper end of the shielding shell (422) is completely wrapped by the shielding insulation column (42), the lower end of the shielding shell (422) extends from the lower end of the shielding insulation column (42) to the outside of the cylindrical clamping table (424), and the shielding shell (422) is grounded.
6. The detector of claim 5, wherein the detector is capable of accurately locating the radiation contamination on the surface: and the anode wire in the anode wire component (2) extends out of the cylindrical clamping table (424) from the anode wire through hole (421) and is electrically connected with the processing module.
7. The detector of claim 6, wherein the detector is capable of accurately locating the radiation contamination on the surface: the projection of the shielding insulating column (42) on the horizontal plane is superposed with the central point of the projection of the anode wire assembly (2) on the horizontal plane.
8. The detector of claim 7, wherein the detector is capable of accurately locating the radiation contamination on the surface: the processing module comprises: the system comprises a main control chip, a partition chip and a processing circuit; the signal end of each anode wire assembly (2) is electrically connected with one processing circuit, the processing circuits of the adjacent anode wire assemblies (2) are electrically connected with one partition chip, and the main control chip is connected with the partition chips in series.
9. The detector of claim 8, wherein the detector is adapted to accurately locate a radiation contamination on a surface: the processing circuit includes: the signal end of the anode wire component (2) is connected with the input end of the corresponding signal amplification circuit, the output end of the signal amplification circuit is connected with the ADC conversion circuit, and the output end of the ADC conversion circuit is connected with the corresponding partition chip.
10. The detector of claim 9, wherein the detector is adapted to accurately locate a radiation contamination on a surface: the detector of accurate surface radiation pollution position of looking for still includes the power, the power includes: high voltage power supply and working power supply, high voltage power supply does: the input end of the transformer is connected with AC220V, the output end of the transformer is connected with a rectifier, the rectifier is connected with a high-voltage stabilizer, the anode of the output end of the high-voltage stabilizer is connected with a plurality of anode wire assemblies (2) after being connected with a resistor R in series, and the cathode of the high-voltage stabilizer is connected with a detector shell (1);
the working power supply is as follows: the power supply module is connected with an AC220V power supply, the power supply module outputs a DC5V power supply, the output end of the power supply module is connected with a voltage stabilizing circuit, the voltage stabilizing circuit outputs a DC3.3V power supply, and the working power supply supplies power for the working of the processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121220790.6U CN215067330U (en) | 2021-06-02 | 2021-06-02 | Detector for accurately searching surface radiation pollution position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121220790.6U CN215067330U (en) | 2021-06-02 | 2021-06-02 | Detector for accurately searching surface radiation pollution position |
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| Publication Number | Publication Date |
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| CN215067330U true CN215067330U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121220790.6U Active CN215067330U (en) | 2021-06-02 | 2021-06-02 | Detector for accurately searching surface radiation pollution position |
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| CN (1) | CN215067330U (en) |
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2021
- 2021-06-02 CN CN202121220790.6U patent/CN215067330U/en active Active
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