CN201540262U - Soil radon daughter static absorption and alpha spectrum measuring device - Google Patents
Soil radon daughter static absorption and alpha spectrum measuring device Download PDFInfo
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- CN201540262U CN201540262U CN2009201690456U CN200920169045U CN201540262U CN 201540262 U CN201540262 U CN 201540262U CN 2009201690456 U CN2009201690456 U CN 2009201690456U CN 200920169045 U CN200920169045 U CN 200920169045U CN 201540262 U CN201540262 U CN 201540262U
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Abstract
The utility model discloses a soil radon daughter static absorption and alpha spectrum measuring device. The device consists of the four parts of a negative high voltage static charging device, a radon daughter static absorption device, an alpha spectrum measuring and data management device and a computer software analysis system. The negative high voltage static charging device is connected with the alpha spectrum measuring and data management device by an interface. The alpha spectrum measuring and data management device is connected with the computer software analysis system by a USB interface. While in work, the negative high voltage static charging device is connected with the radon daughter static absorption device. Soil radon is measured by measuring the alpha spectrum information of radon daughters absorbed by the radon daughter static absorption device. The method can overcome the defects of the existing soil radon measuring method, solve the problems of low soil radon measuring efficiency, precision, accuracy, reliability, etc, realize indirect soil radon measurement by measuring radon daughter nuclide in soil, and overcome the influence of thorium emanation. The utility model meets the pressing requirements of the current geological survey field and environmental assessment field for soil radon measurement.
Description
Technical field
The utility model relates to the detection technique field, specifically, surveys the application requirements of radon at the soil in present geologic prospect field and environmental evaluation field, proposes radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth.
Background technology
Soil is surveyed radon and is widely used in geologic prospect field and radioactive environmental evaluation field.In the geologic prospect field, radon exception monitoring, landslide slide structure band are reconnoitred before exploration that uranium exploration, bedrock underground water are reconnoitred, subterranean coal dieseling fire distributes, the earthquake shake, reconnoitring etc. of the reconnoitring of surface collapse and goaf, building lot potential fault and ground fissure can adopt soil survey radon method to realize.Penetrate the evaluation field in putting property of environment,, also all need to carry out Soil Radon and measure such as the detection of market place builet below the ground ground radon concentration index, the detection of structure foundation Soil Radon concentration index etc.
The method that has soil survey radon now mainly comprises: pump suction type instantaneous detecting radon method, static α card always measure radon, alpha track is surveyed radon, Po-210 method survey radon, α cup absorption method survey radon, natural thermoluminescent method survey radon.These Soil Radon measuring methods are in the reliability of surveying work efficient, working automation degree, measurement data and measure sensitivity etc. and all have some defectives, seldom make simultaneously alpha energy spectrum and measure, radon measurement is a very important gordian technique in using in earth and alpha energy spectrum is measured.Because technical reason, present main radon measurement method α cup, α card absorption method are difficult to accomplish alpha energy spectrum and measure.Static α card measuring method does not provide more stable, unified, a cheap high-pressure electrostatic holding device as yet at present, does not adopt the alpha energy spectrum metering system as yet yet.Though pump suction type transient measurement method solves the alpha energy spectrum problems of measurement, but because the measurement data of the acquisition in the factor affecting such as measurement environment, soil compactness, Soil Radon source of the gas enrichment condition make several minutes alters a great deal, be difficult to analysis and utilization, simultaneously because the detector pollution problem makes real work efficient very low.Radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism hardware system cost is low and the radon daughter electrostatic adsorption device is not fragile in the earth, be convenient to layout in a large number, being suitable for extensive geology reconnoitres, when increasing work efficiency, also can obtain the radon daughter information that Instantaneous Method and continuous mode method can't be surveyed, have simultaneously and distinguish the radon thorium, make detector avoid that radon daughter pollutes, characteristics such as easy to use.
The utility model content
Technical problem to be solved in the utility model is, how radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in the earth are provided, this method can overcome the defective that existing soil is surveyed the radon method, soil be can solve and the efficiency of measurement of radon, measuring accuracy, measurement accuracy, problem that the measurement reliability is low surveyed, can realize observational measurement to radon daughter nucleic in the earth, thereby realize measurement indirectly to radon in the earth, the influence of thoron can be eliminated, thereby the active demand that present geologic prospect field and environmental evaluation field are measured Soil Radon can be satisfied.
For reaching the purpose of foregoing invention, the technical scheme that the utility model adopted: radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth are provided, it is characterized in that total system is made of negative high voltage electrostatic charging device, radon daughter electrostatic adsorption device, alpha energy spectrum measurement and data administrator and computer software analysis system 4 parts.The negative high voltage charging device is measured with alpha energy spectrum by reference power supply interface (4) and is linked to each other with data administrator, alpha energy spectrum is measured and data administrator links to each other with the computer software analysis system by USB interface, links to each other with the radon daughter electrostatic adsorption device during work of negative high voltage electrostatic charging device.
According to radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth provided by the present invention, it is characterized in that described device comprises following job step:
A, by the negative high voltage electrostatic charging device, with the charging of radon daughter electrostatic adsorption device, make its band negative high voltage static.
B, select measurement point according to measuring needs, the radon daughter electrostatic adsorption device is embedded in the soil of each measurement point, the embedding time is the time that radon and daughter thereof can reach radioactivity mobile equilibrium again in the earth;
C, radon daughter electrostatic adsorption device are collected radon daughter in sheet (7) the absorption earth by the radon daughter of the band negative high voltage static of its inside;
D, etc. after radon daughter reaches radioactivity mobile equilibrium again in the earth, take out the radon daughter of radon daughter electrostatic adsorption device inside and collect sheet, exist side by side and pack promptly that alpha energy spectrum is measured into and data administrator carries out alpha energy spectrum and measures;
E, alpha energy spectrum measure and data administrator can be connected with computer software by interface, by computer software measurement data is carried out unified Analysis and handle, and the generation image are exported.
According to radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth provided by the present invention, it is characterized in that, the high voltage conversion circuit of DC/DC (2) is equipped with in described negative high voltage charging device inside, and negative high voltage output (1) links to each other with the radon daughter electrostatic adsorption device during work.
According to radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth provided by the present invention, it is characterized in that described radon daughter electrostatic adsorption device is made up of radon diffusion cavity (8), radon daughter collection sheet (7) and negative high voltage static retainer (6) three parts in the earth respectively.Leave radon diffusion hole (16) in the earth on the radon diffusion cavity in the earth, the mesh size can diffuse into and is advisable for soil particle should not enter in the earth radon and daughter thereof.Radon daughter collect sheet for conduction be difficult for corrosion and radon daughter had the material of better adsorbability, place the radon daughter absorption sheet of radon diffusion cavity top to place in the groove (15).The high-pressure electrostatic of negative high voltage static retainer is kept by CBB high-voltage capacitance (10), CBB high-voltage capacitance negative high voltage static output terminal connection circuit plate (11), on circuit board, weld spring (12) and be connected with negative high voltage static output terminal, internal circuit passes through ground connection copper post (9) and is connected with the earth with epoxy resin perfusion sealing, electrostatic high-pressure ground end.Radon diffusion cavity and negative high voltage static retainer shell are the insulating material with better hardness and strong ageing resistance in the earth.Negative high voltage static retainer is connected with radon diffusion cavity in the earth by connecting turnbuckle (13), and when the high-pressure electrostatic body was connected with radon diffusion cavity in the earth, its high-voltage output end can be collected sheet (14) by spring and radon daughter and be connected, and made its band negative high voltage static.
According to radon daughter electrostatic adsorption device provided by the invention, it is characterized in that, during the radon daughter electrostatic adsorption device is placed into the soil when work, and make radon daughter collection sheet place radon diffusion inside cavity and soil to isolate.
According to radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth provided by the present invention, it is characterized in that, increase adsorptive power by negative high voltage static, measure the characteristic information that obtains radon daughter in the earth by alpha energy spectrum, thereby obtain radon concentration information in the earth indirectly radon daughter in the earth.
According to radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth provided by the present invention, it is characterized in that described alpha energy spectrum is measured and data administrator is made up of radon daughter readout device and alpha energy spectrum metering circuit system.Semiconductor detector (18) and charge-sensitive pre-amplification circuit (17) are equipped with in radon daughter readout device inside, and the alpha energy spectrum metering circuit is connected by the charge-sensitive pre-amplification circuit of interface line with radon daughter readout device inside.Radon daughter is collected pack into movable tray (21) radon daughter of radon daughter readout device of sheet (20) to be collected sheet and places in the groove (19), make its radon daughter absorption surface near semiconductor detector, the radon daughter generation alpha-decay that is adsorbed on the radon daughter collection sheet produces the α particle, these α particle signals that detect by semiconductor detector, after amplifying circuit nurses one's health amplification by conditioning, convert the alpha energy spectrum signal to through multichannel pulse scope-analyzer again and enter microprocessor and carry out the alpha energy spectrum analysis.Whole alpha energy spectrum is measured and data administrator is provided with the low-power dissipation power supply administration module.
In sum, radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism have following advantage in the earth provided by the utility model:
1, in system design, radon daughter is collected and separately design of measurement of radon daughters, help eliminating the pollution of radon daughter to detector.
2, on measuring principle, based on radon static diffusion and electrostatic adsorption principle in the earth, adopted high voltage electrostatic device to increase the quantity of information of absorption radon daughter, and adopted alpha energy spectrum to survey the radon mode, the qualitative analysis of radon daughter nucleic in the earth can be provided, thereby realize the measurement of radon in the earth indirectly, can distinguish uranium series and the daughter of thorium family alpha-decay.
3, on the surveying work mode, can carry out the multi-measuring point synchronous working mode that large tracts of land is layouted, but make measurement data have more comparative.Can be according to actual measurement requirements of one's work configuration radon daughter electrostatic adsorption device quantity, this realistic application demand, surveying work efficient height.
4, on cost performance, radon daughter electrostatic adsorption device low production cost, not fragile during use, alpha energy spectrum is measured and the data administrator structure is small and exquisite, low in energy consumption, low price, easy to use etc., so is convenient to promote the use of.
5, on using, can be applicable to that uranium exploration, bedrock underground water are reconnoitred, subterranean coal dieseling fire distributes exploration, landslide slide structure band is reconnoitred, the field such as reconnoitre of the reconnoitring of surface collapse and goaf, building lot potential fault and ground fissure.
Description of drawings
Fig. 1 is the structure diagram of radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth;
Fig. 2 is a negative high voltage electrostatic charging device structure partial cut-open view;
Wherein, (1) negative high-voltage electrode; (2) the high voltage conversion circuit of DC/DC; (3) high pressure ground; (4) power supply input standard interface; (5) connect turnbuckle.
Fig. 3 forms partial sectional view for the radon daughter electrostatic adsorption device;
Wherein, (6) negative high voltage static retainer; (7) radon daughter is collected sheet; (8) radon diffusion cavity in the earth.
Fig. 4 is a radon daughter electrostatic adsorption device structure partial cut-open view;
Wherein, (9) ground connection copper post; (10) CBB high-voltage capacitance; (11) circuit board; (12) spring; (13) connect turnbuckle; (14) radon daughter is collected sheet; (15) radon daughter is collected sheet and is placed groove; (16) radon and daughter diffusion hole thereof in the earth.
Fig. 5 is a radon daughter readout device structure partial cut-open view
Wherein, (17) charge-sensitive preamplifier circuit board; (18) semiconductor detector; (19) radon daughter is collected sheet and is placed groove; (20) radon daughter is collected sheet; (21) movable tray;
Fig. 6 measures and data administrator metering circuit functional diagram for alpha energy spectrum.
Embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are described in detail.
Radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism is characterized in that in a kind of earth provided by the present invention, and described device comprises following job step: A, passes through the negative high voltage electrostatic charging device, with the charging of radon daughter electrostatic adsorption device, make its band negative high voltage static; B, select measurement point according to measuring needs, the radon daughter electrostatic adsorption device is embedded in the soil of each measurement point, the embedding time is the time that radon and daughter thereof can reach radioactivity mobile equilibrium again in the earth; C, radon daughter electrostatic adsorption device are collected radon daughter in the sheet absorption earth by the radon daughter of its inner band negative high voltage static; D, etc. after radon and daughter thereof reach radioactivity mobile equilibrium again in the earth, take out the radon daughter of radon daughter electrostatic adsorption device inside and collect sheet, exist side by side and pack promptly that alpha energy spectrum is measured into and data administrator carries out alpha energy spectrum and measures; E, alpha energy spectrum measure and data administrator can be connected with computer software by interface, and by computer software measurement data analyzing and processing, and the generation image is exported.
Figure 1 shows that the structure diagram of radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth, as shown in the figure, whole measuring system comprises that several radon daughter electrostatic adsorption devices, negative high voltage electrostatic charging device, alpha energy spectrum measurement and data administrator and computer software analysis system 4 parts constitute.Can be connected with alpha energy spectrum measurement and data administrator by the reference power supply interface line when described negative high voltage electrostatic charging device charges to the radon daughter electrostatic adsorption device obtains the power supply input, is connected with the negative high voltage electrostatic charging device by turnbuckle when described radon daughter electrostatic adsorption device charges.Imbed in the earth when described radon daughter electrostatic adsorption device is worked, after radon daughter all reaches radioactivity mobile equilibrium in the wait earth, take out radon daughter collection sheet and carry out the alpha energy spectrum measurement by alpha energy spectrum measurement and data administrator.Adopt the USB mouth to be connected between described alpha energy spectrum measurement and data administrator and the Computer Analysis software;
Figure 2 shows that negative high voltage electrostatic charging device structure partial cut-open view.As shown in the figure, its inside has the high voltage conversion circuit of DC/DC (2), when the radon daughter electrostatic adsorption device is charged, its power input measures with alpha energy spectrum by reference power supply interface line (4) and the data administrator output port of power source is connected, and negative high voltage static output terminal links to each other with the radon daughter electrostatic adsorption device by connecting turnbuckle (5).When linking to each other, radon daughter electrostatic adsorption device negative high-voltage electrode links to each other with negative high voltage electrostatic charging device negative high-voltage electrode by spring, and high pressure ground (3) link to each other with the high pressure ground (9) of radon daughter electrostatic adsorption device by clip.
Figure 3 shows that radon daughter electrostatic adsorption device composition partial sectional view, as shown in the figure, form by radon diffusion cavity (8), radon daughter collection sheet (7) and negative high voltage static retainer (6) three parts in the earth.
Figure 4 shows that radon daughter electrostatic adsorption device structure partial cut-open view, as shown in the figure, leave radon diffusion hole (16) in the earth on the radon diffusion cavity in the earth, the mesh size can diffuse into and is advisable for soil particle should not enter in the earth radon and daughter thereof.Radon daughter collect sheet for conduction be difficult for corrosion and radon daughter had the material of better adsorbability, place the radon daughter absorption sheet of radon diffusion cavity top to place in the groove (15).The high-pressure electrostatic of negative high voltage static retainer is kept by CBB high-voltage capacitance (10), CBB high-voltage capacitance negative high voltage static output terminal connection circuit plate (11), on circuit board, weld spring (12) and be connected with negative high voltage static output terminal, internal circuit passes through ground connection copper post (9) and is connected with the earth with epoxy resin perfusion sealing, electrostatic high-pressure ground end.Radon diffusion cavity and negative high voltage static retainer shell are the insulating material with better hardness and strong ageing resistance in the earth.Negative high voltage static retainer is connected with radon diffusion cavity in the earth by connecting turnbuckle (13), and when the high-pressure electrostatic body was connected with radon diffusion cavity in the earth, its high-voltage output end can be collected sheet (14) by spring and radon daughter and be connected, and made its band negative high voltage static.
Figure 5 shows that radon daughter readout device structure partial cut-open view.As shown in the figure, charge-sensitive preamplifier circuit board (17) and semiconductor detector (18) are equipped with in radon daughter readout device inside, and the alpha energy spectrum metering circuit is connected by the charge-sensitive pre-amplification circuit of interface line with radon daughter readout device inside.Radon daughter is collected pack into radon daughter on the movable tray (21) of radon daughter readout device of sheet (20) to be collected sheet and places in the groove (19), make radon daughter collect the radon daughter absorption surface of sheet near semiconductor detector, the radon daughter generation alpha-decay that is adsorbed on the radon daughter collection sheet produces the α particle, these α particle signals that detect by semiconductor detector, after amplifying circuit nurses one's health amplification by conditioning, convert the alpha energy spectrum signal to through multichannel pulse scope-analyzer again and enter microprocessor and carry out the alpha energy spectrum analysis.
Figure 6 shows that alpha energy spectrum measurement and data administrator metering circuit functional diagram.As shown in the figure, put, nurse one's health amplifying circuit, multichannel pulse scope-analyzer, SOC (system on a chip) microprocessor, man-machine interface, data memory module, GPS module, USB interface before comprising the semiconductor detector that is used to survey radon daughter, low noise.Detector detects the radon daughter signal, is amplified to the pulse signal of required size by preposition amplification and conditioning amplifying circuit, by multichannel pulse scope-analyzer this conversion of signals is become the alpha energy spectrum signal again, enters the SOC (system on a chip) microprocessor again and analyzes.By man-machine interface alpha energy spectrum measurement and data administrator are operated.The GPS module is mainly obtained the geographical position coordinates information of measuring point.The data of measuring can be stored by memory module, and can carry out exchanges data by USB interface and computer software.In order to save power supply, whole detector has adopted low-power dissipation power supply administration module design proposal.
Though described embodiments of the present invention in conjunction with the accompanying drawings, the protection domain that those of ordinary skills do not need various distortion that creativity work just can make or modification still to belong to this patent within the scope of the appended claims.
The utlity model has following features:
1. on system, radon daughter is collected and separately design of measurement of radon daughters, be conducive to eliminate radon daughter to the pollution of detector.
2. on measuring principle, based on radon static diffusion and electrostatic adsorption principle in the earth, adopted high voltage electrostatic device to increase the information content of absorption radon daughter, and adopted alpha energy spectrum to survey the radon mode, alpha energy spectrum is surveyed the qualitative analysis that radon can provide radon daughter, thereby indirectly realize the measurement of radon, can distinguish uranium series and the daughter of thorium family alpha-decay;
3. on the surveying work mode, the multi-measuring point synchronous working mode that large tracts of land is layouted can be carried out, radon daughter electrostatic adsorption device quantity can be disposed as required, the operating efficiency that realistic application demand and raising are measured;
4. on cost performance, radon daughter electrostatic adsorption device low production cost, not fragile during use, alpha energy spectrum measures and the data administrator structure is small and exquisite, low in energy consumption, low price, easy to use etc., so is convenient to promote the use of.
5. on using, can be applicable to that uranium exploration, bedrock underground water are reconnoitred, the exploration of subterranean coal dieseling fire distribution, landslide sliding structure band are reconnoitred, the field such as reconnoitre of the reconnoitring of surface collapse and goaf, building lot buried fault and ground fissure.
6. mainly finishing the radon in soil daughter alpha energy spectrum on circuit function measures. Aspect the alpha ray particle detection, because alpha ray has very strong ionizing power with material as the time spent, according to this characteristic, nuclear radiation detector can convert the alpha ray particle of different-energy to the faint electric signal of corresponding size, pass through then subsequent conditioning circuit, this faint electric signal is carried out shaping amplify, enter multichannel pulse scope-analyzer after making it to become an electric impulse signal. Carry out work by control circuit control multichannel pulse scope, the analog signal conversion of different amplitudes is become corresponding data signal, track address of this digitized representation, with the address code recording impulse number of track address as memory, the numeration of each track address just can show the distribution situation of impulse amplitude. And the range signal size is the different performance of each element emittance, and the counting of location, corresponding road represents the radiation intensity of corresponding energy. The Alpha-ray energy of radon daughter is fixed, and can measure the radon daughter relevant information data by the mode of multiple tracks power spectrum.
Claims (5)
1. based on radon daughter Electrostatic Absorption in a kind of earth and alpha energy spectrum measurement mechanism, it is characterized in that, total system is made of negative high voltage electrostatic charging device, radon daughter electrostatic adsorption device, alpha energy spectrum measurement and data administrator and computer software analysis system 4 parts, the negative high voltage charging device is measured with alpha energy spectrum by reference power supply interface (4) and is linked to each other with data administrator, alpha energy spectrum is measured and data administrator links to each other with the computer software analysis system by USB interface, links to each other with the radon daughter electrostatic adsorption device during work of negative high voltage electrostatic charging device.
2. radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth according to claim 1, it is characterized in that: the high voltage conversion circuit of DC/DC (2) is equipped with in described negative high voltage charging device inside, and negative high voltage output (1) links to each other with the radon daughter electrostatic adsorption device during work.
3. radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth according to claim 1 is characterized in that: described radon daughter electrostatic adsorption device is made up of radon diffusion cavity (8), radon daughter collection sheet (7) and negative high voltage static retainer (6) three parts in the earth respectively; Leave radon diffusion hole (16) in the earth on the radon diffusion cavity in the earth, radon daughter is collected sheet and is difficult for corrosion and material that radon daughter is had better adsorbability for what conduct electricity, place the radon daughter absorption sheet of radon diffusion cavity top to place in the groove (15), the high-pressure electrostatic of negative high voltage static retainer is kept by CBB high-voltage capacitance (10), CBB high-voltage capacitance negative high voltage static output terminal connection circuit plate (11), on circuit board, weld spring (12) and be connected with negative high voltage static output terminal, internal circuit seals with the epoxy resin perfusion, electrostatic high-pressure ground end is connected with the earth by ground connection copper post (9), and radon diffusion cavity and negative high voltage static retainer shell are the insulating material with better hardness and strong ageing resistance in the earth; Negative high voltage static retainer is connected with radon diffusion cavity in the earth by connecting turnbuckle (13), and when the high-pressure electrostatic body was connected with radon diffusion cavity in the earth, its high-voltage output end can be collected sheet (14) by spring and radon daughter and be connected.
4. radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism in a kind of earth according to claim 1 is characterized in that: in placing into the soil when described radon daughter electrostatic adsorption device is worked, and make radon daughter collection sheet place radon diffusion inside cavity and soil to isolate.
5. radon daughter Electrostatic Absorption and alpha energy spectrum measurement mechanism is characterized in that in a kind of earth according to claim 1, and described alpha energy spectrum is measured and data administrator is made up of radon daughter readout device and alpha energy spectrum metering circuit system; Semiconductor detector (18) and charge-sensitive pre-amplification circuit (17) are equipped with in radon daughter readout device inside, and the alpha energy spectrum metering circuit is connected by the charge-sensitive pre-amplification circuit of interface line with radon daughter readout device inside; Radon daughter is collected pack into radon daughter on the movable tray (21) of radon daughter readout device of sheet (20) collect sheet and place in the groove (19), radon daughter is collected the radon daughter absorption surface of sheet near semiconductor detector; Whole alpha energy spectrum is measured and data administrator is provided with the low-power dissipation power supply administration module.
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| CN2009201690456U CN201540262U (en) | 2009-08-12 | 2009-08-12 | Soil radon daughter static absorption and alpha spectrum measuring device |
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| CN2009201690456U CN201540262U (en) | 2009-08-12 | 2009-08-12 | Soil radon daughter static absorption and alpha spectrum measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043159A (en) * | 2010-10-22 | 2011-05-04 | 衡阳师范学院 | Measurement method for continuously and fast tracking radon concentration change |
| CN102820596A (en) * | 2012-08-03 | 2012-12-12 | 昆山大百科实验室设备工程有限公司 | Anti-static USB (universal serial bus) interface |
| CN105738937A (en) * | 2016-04-29 | 2016-07-06 | 成都理工大学 | Static alpha-cup multifunctional emanometer |
| CN113484895A (en) * | 2021-05-25 | 2021-10-08 | 中国工程物理研究院材料研究所 | Alpha surface pollution detector and detection method for high radon background |
-
2009
- 2009-08-12 CN CN2009201690456U patent/CN201540262U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043159A (en) * | 2010-10-22 | 2011-05-04 | 衡阳师范学院 | Measurement method for continuously and fast tracking radon concentration change |
| CN102820596A (en) * | 2012-08-03 | 2012-12-12 | 昆山大百科实验室设备工程有限公司 | Anti-static USB (universal serial bus) interface |
| CN105738937A (en) * | 2016-04-29 | 2016-07-06 | 成都理工大学 | Static alpha-cup multifunctional emanometer |
| CN113484895A (en) * | 2021-05-25 | 2021-10-08 | 中国工程物理研究院材料研究所 | Alpha surface pollution detector and detection method for high radon background |
| CN113484895B (en) * | 2021-05-25 | 2023-07-28 | 中国工程物理研究院材料研究所 | Alpha surface pollution detector and detection method for high radon background |
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