CN102033240B - Real-time and on-spot water trace radioactive substance and radiation remote wireless monitoring system - Google Patents

Real-time and on-spot water trace radioactive substance and radiation remote wireless monitoring system Download PDF

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Publication number
CN102033240B
CN102033240B CN200910217733XA CN200910217733A CN102033240B CN 102033240 B CN102033240 B CN 102033240B CN 200910217733X A CN200910217733X A CN 200910217733XA CN 200910217733 A CN200910217733 A CN 200910217733A CN 102033240 B CN102033240 B CN 102033240B
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monitoring
detector
data
module
real
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CN200910217733XA
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CN102033240A (en
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周保红
胡天佐
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长春博信光电子有限公司
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Abstract

The invention discloses a real-time and on-spot water trace radioactive substance and radiation remote wireless monitoring system and belongs to the field of detection technology. The system is used for monitoring the trace radioactive substances and radiation in water and overcomes the shortcomings of complicated operation, low precision, danger, failure in real-time monitoring and the like in the prior art. The system consists of a surface platform floating on the water surface of a monitored spot, a floating barrel fixed on the surface platform, a global positioning system (GPS) module arranged in the floating barrel, a data processing and electric signal radio transmitting device, a solar panel, a radioactive radiation detector soaked in water, a radioactive nuclide accumulating device, which is connected with the radioactive radiation detector and consists of a permeable membrane and macromolecular gel, an accumulator settled at the water bottom, a radio signal receiver and a master control computer. The system has the advantages that: the monitoring range in a low trace level is widened greatly; historical data and a predetermined threshold value can be inquired, and an alarm can be given in real time; monitoring precision is high; radiation damage to monitoring staff is avoided; operation is simple and convenient; and manufacturing cost is low.

Description

On-the-spot underwater trace radiomaterial and radiation remote wireless monitoring system in real time,
Technical field
The invention belongs to the test technique automatic field.Can be widely used in national security, nuclear tests, nuclear power station, nuclear fuel material exploitation, medical science, water treatment procedure center contamination monitoring, nuclear leakage detection, nuke rubbish monitoring and environment control.
Background technology
Because expanding economy, shortage of energy sources, and to the consideration of national security, impel countries in the world nuclear power industry to emerge rapidly.In the development and utilization process of nuclear energy, inevitably will be to the environmental emission radioactive pollutant.In case cause radioactive contamination, consequence is beyond imagination.After radioactive pollutant enters human body, can continue to emit α, β ray, harm people soma, and can put aside at inside of human body, facilitate various illnesss such as anaemia, malignant tumour and its offspring is had harmful effect.Radioactive contamination has following singularity: (1) and general chemical harmful toxic matter pollute different, and radioactive contamination does not normally have to be smelt colourlessly, and the chemical state of its radioactivity and material has nothing to do, and is not easy to discover very much.(2) each radioactive nuclide has certain half life period, does not change because of air pressure, temperature.(3) radioactive nuclide can both be launched one or more rays (α, β, gamma-rays) with certain energy usually, except the nuclear reaction condition, any chemistry, physics, biological processing all can not change the character of radioactive nuclide, but radioactive nuclide can or be flowing in the occurring in nature migration along with the diffusion of medium, and enter in plant, animal, the human body be absorbed, enrichment.
Many countries get rid of in the exploitation of nuclear energy and profit and occur alpha-contamination situation in the process successively, as: the Chernobyl Plant of USSR (Union of Soviet Socialist Republics) and U.S.'s nuclear power plant accident.The uranium ore of states such as the U.S., Australia, Portugal pollutes, the nuclear pollution problem of states such as Canada, Poland, Mongolia and Romania.For this reason, pay attention to the research of radioactive nuclide and environmental concerns in the world always.From the monitoring radioactive contamination, develop into alpha-contamination control and reparation, mainly adopt physics and chemical technology, but monitor radioactive contamination how real-timely, on-the-spot, be a difficult problem always.
In the method for existing radioactive pollution monitoring, usually with fixed point, decide the source sampling, the mode of testing laboratory's detection is that intense source is checked basically then, and a little less than extremely thin to the monitoring method of the migration of radioactive nuclide in water, diffusion, dissolution/absorbtion.Existing detector precision can't directly measure trace level activity material and the radiation in the water.Traditional underwater trace radiomaterial and monitoring method complicated operation, the precision of radiation is low, cost is high, tool is dangerous can not be realized real-time monitoring simultaneously.It is loaded down with trivial details to be embodied in (1) water sample preprocessing process, comprising: sampling, concentrate, conversion, washing, calcination, ashing, a series of links such as weigh.(2) the testing result precision is low, the deviation that any tiny water sample loss in testing process and sample contamination all can cause assay.(3) when carrying out the operation of radioactive powder, the testing staff must carry out personal protection work, avoids sucking radioactive particle once in a while and harm people soma in the manufacturing process.(4) detect the cost costliness, with at present generally the ICP instrument of usefulness be example, its new machine market price is 250,000USD to 450,000.00USD, also will with the valuable inert gas argon gas of costliness (every machine consumes 2 every year approximately, 000.00USD to 4,000.00USD).(5) the water sample result is the pollution of waterhead situation that presents other day, does not have the ability of real-time field monitoring, can not carry out Realtime Alerts to accident, affects the best opportunity of taking corresponding measure adversely.
Summary of the invention
The purpose of this invention is to provide a kind of real-time, on-the-spot underwater trace radiomaterial and radiation remote wireless monitoring system, be used for the monitoring of underwater trace radiomaterial and radiation, have simple to operate, precision is high, cost is low, and utilize sun power and wireless data transceiving, overcome that the complicated operation, the precision that exist in the prior art are low, cost is high, tool is dangerous, can not realize shortcomings such as monitoring in real time simultaneously.
The present invention is made up of the data acquisition, processing, data-signal hop and the remote monitoring main control part that are placed on the monitoring waters.The data acquisition in monitoring waters wherein, handle, the data-signal hop comprises the surface platform that floats on the on-the-spot water surface of monitoring, be fixed on the floating drum above the surface platform, be installed in the floating drum by global positioning satellite (GPS) module, comprise microprocessor, the data handling system of data-switching and storage unit, the data that wireless communication module is formed are handled and the electric signal wireless base station apparatus, be installed in solar panel and emitting antenna on the floating drum, be fixed on radioactive emission detector under water on the surface platform, the radionuclide accumulation device of being formed by permeable membrane and high-molecular gel that links with radioactive emission detector, sink to water-bed accumulator, connect accumulator and data and handle, the cable of signal transmission circuit and solar panel charging control circuit; The remote monitoring main control part comprises wireless signal receiver and main control computer.
Wherein, the radioactive emission detector in data acquisition, processing, the data-signal hop can be selected X-ray detectors such as existing various HpGe (HPGe) detector, HpGe X-ray detector, silicon (lithium) [Si (Li)], silicon drifting detector, planar technology silicon (Si-PIN) detector, charged particle detector, [Si-PIN detector, silicon surface barrier detector, silicon (lithium) detector], scintillation detector [assembly of NaI (Tl), Cs (Tl) etc. and photomultiplier], LaCl for use 3(Ce), LaBr 3(Ce) scintillation detector, GSO:Ce, LSO:Ce, BSO, BGO, BaF 2Scintillation detector, cadmium telluride and tellurium zinc cadmium (CdTe/CdZnTe) semiconductor detector, adamas detector, proportional counter (PC).
Wireless communication module can select for use wireless communication module to select for use scope to comprise radio-frequency communication module, the 3G wireless communication module, GSM/GPRS or CDMA module, bluetooth module, the satellite communication module, infrared module, microwave communication mould, IEEE802.11 module, IEEE802.15 module, the IEEE802.16 module, wireless RS-232 module, wireless UWB, one or more in the radio USB module.
The course of work of the present invention is:
Surface platform is put into waters to be measured, is connected with cable, accumulator simultaneously, and accumulator is as standby power supply and sink to the bottom weight in case system floats from waters to be determined with current.Floating drum on the surface platform be used for guaranteeing whole data processing and emission coefficient, solar panel and antenna keep afloat on operate as normal.Solar panel and solar charging electric control circuit link to each other with accumulator, convert sun power to electrical power storage and power to total system.Because dual power supply is even also being transformed into storage battery power supply under the inadequate situation overcast and rainy, sunshine continuously, carry out the detection of radioactive nuclide and radiant quantity, the processing of real time data and emission incessantly with the assurance system in water.
Radionuclide accumulation device under the surface platform carries out enrichment to the radioactive nuclide in the water, detector is to the real-time data acquisition of radiant quantity, detector, electrooptical device, signal amplification integeral type circuit three parts form signalling channel, convert the radiation intensity of radioactive nuclide to count pulse, data are handled the processing of finishing detection data with control module, the data of handling are sent to long-range main monitoring computer by communication module through antenna through interface conversion circuit.The radioactivity that described radioactive emission detector is measured comprises one or more in α, β, γ, X ray, the neutron.The content of measuring comprises one or more in nuclide identification, nucleic dose rate, counting rate, dose rate, integral dose, the mean dose information.Main control computer shows radiant quantity and concentration and the room and time information of radioactive nuclide in real time in curve map/tables of data mode, dynamic real-time shows the monitoring result in a certain section time zone as required, but the Monitoring Data in playback time zone, from background data base, inquire about all or historical data sometime, predetermined threshold value, Realtime Alerts.
The advantage of monitoring system of the present invention is:
1, enlarged the monitoring range of low trace direction, the radionuclide accumulation device of being formed by permeable membrane and high-molecular gel among the present invention, the resin of water and high-molecular gel is kept apart, control the ion exchange process of radioactive nuclide and gel by the middle layer.Because the combination of high-molecular gel and radioactive nuclide, make middle layer between the gel of outside water and inner combination form the concentration difference of a radioactive nuclide, like this, the amount of radionuclide accumulation to be measured and accumulated time have a corresponding relation, in the time of separating and accumulating, the diffusion flux of radioactive nuclide can calculate with the Fick diffusion law, and the amount that records accumulation by detector just can be calculated radiant quantity and the concentration of the trace level activity nucleic in the water outlet.This technology can survey that low-down trace ion concentration (can reach 10 in the water -7Mol/L).State-of-the-art detector also can not arrive so low trace ion concentration by direct detection in the world at present.Can be widely used in departments such as nuclear test site, nuclear power plant, stone pit, pharmaceutical factory, hospital, testing laboratory, metal treatment plant, drinking water treatment factory, health and epidemic prevention, river and environmental protection to the daily real-time monitoring at water source.When occurring nuclear with the radiation abnormal conditions, the decision-making foundation of taking corresponding action in time is provided, in order to start emergency rescue system rapidly, nuclear and radiation accident are reduced to minimum level to social harm and personnel's damage, also have very important meaning to taking precautions against nuclear with the radiation terrorist incident.
2, main control computer shows radiant quantity and concentration and the room and time information of radioactive nuclide in real time in curve map/tables of data mode, dynamic real-time shows the monitoring result in a certain section time zone as required, but the Monitoring Data in playback time zone, from background data base, inquire about all or historical data sometime, predetermined threshold value, Realtime Alerts.The staff can take immediate measure and deal with accident and pre-anti-pollution further diffusion.This is that present monitoring technology institute is inaccessible.
3, monitoring accuracy height carries out real-time, on-the-spot detection to waters to be measured.By the wireless transmission result, can accurately measure trace level activity nucleic and radiation in the water.Ratio of precision is collected at present, laboratory measurement method prefabricated and that leave the theatre improves greatly.Any tiny water sample loss and sample contamination in the testing process of laboratory all can cause the big deviation of assay.
4, to the radiationless harm of monitoring personnel, owing to adopted long distance wireless transmission result's mode, detectoscope has replaced the tester to sample to the waters of unknown radiation pollution frequently. simultaneously, the detection in on-the-spot waters makes the tester avoid might being subjected to radiation hazard from sampling in the laboratory.
5, easy and simple to handle, the tester only need put into total system once in radioactive waters to be measured, can be at remote real-time monitoring.Present employed laboratory method need be handled water sample, comprising: sampling, concentrate, conversion, washing, calcination, ashing, a series of links such as weigh.Process is loaded down with trivial details, time-consuming, effort.
6, cost is low, and primary system is installed and can be monitored in real time for a long time, and total expenses is 1/tens of present laboratory testing cost.
Countries in the world government and the people reach common understanding to environmental protection now; the improvement of the earth environment that we are depended on for existence has been instant problem; the national environmental protection system is built in the Eleventh Five-Year Plan and is pointed out; want " according to the standardization construction of national requirements standard environmental law enforcement system, environmental monitoring system, environmental publicity and education ability, to accelerate to improve environmental monitoring network, environment and nuclear safety infosystem, the emergent monitoring of environmental accident and great environment accident pre-alarming system." native system is applicable to the requirement of environs radiation monitoring fully, in the environmental monitoring field very wide application prospect arranged for this reason.
Description of drawings
Fig. 1 is monitoring system one-piece construction figure.
Fig. 2 is for adopting the workflow diagram of radio frequency signal transmission.
Fig. 3 is for adopting the workflow diagram of GPRS mobile communication signal transmission.
Embodiment
Embodiment one
Consult Fig. 1, Fig. 2, if float over the surface platform 5 on the on-the-spot water surface of monitoring, fixing floating drum 3 above the surface platform, in floating drum, install by global positioning satellite (GPS) module, comprise microprocessor, the data handling system of data-switching and storage unit, the data that the less radio-frequency transmitter module is formed are handled and electric signal wireless base station apparatus 4, at floating drum solar panel 2 and emitting antenna 1 are installed, radioactive emission detector 6 under water is installed under surface platform, the radionuclide accumulation device 7 that links at radioactive emission detector, if sink to water-bed accumulator 9, connect the cable 8 between accumulator and data processing circuit and the solar panel charging control circuit, form monitoring waters data acquisition, data are handled, data-signal wireless transmit part.Radioactive emission detector 6 wherein is HpGe (HPGe) detector (built-in caesium-137 standard radioactive source, the about 500Bq/15 nCi of activity can carry out energy to instrument and calibrate automatically).Radionuclide accumulation device wherein is by the cellulose nitrate permeable membrane of 100 micron thickness, 0.45 micron pore size, and the copper ferrocyanide gel assembling that polyacrylamide and chelex-100 resin combine constitutes.The collection of control data wherein, the wireless transmit of handling, finish data are selected the MSP430F1611 chip for use, and its operating voltage is that 1.8V~3.6V, electric current are 0.1 μ A~400 μ A, has little power consumption, microminiaturized characteristics.The MSP430F1611 chip has 16 interrupt sources, CPU can be placed battery saving mode, also can in 6 μ s times, CPU be waken up, its table look-up efficiently disposal route and higher data processing speed, satisfy data acquisition and the data transmission requirement of sensor and wireless transmission circuit fully, and also be favourable for the solar storage battery electric power system.Wherein, solar powered part is by solar panel, solar charging electric control circuit and accumulator are formed, absorbed solar energy by solar panel and to change into electric energy, flow to the solar charging electric control circuit, being charged a battery by the solar charging electric control circuit again and outwards export the d. c. voltage signal of 6V. the solar charging electric control circuit adopts 8 monolithic P87LPC767 of PHLIPS company, it contains the eprom memory of 4kB and one 8 A/D converter, simple in structure, low in energy consumption, relatively be suitable as the control chip of charger, accumulator adopts lead-acid accumulator, and take waterproof measure, sink under water, accumulator is as sinking to the bottom weight in case system floats from waters to be determined with current, battery capacity is 6Ah. accumulator and governor circuit, detector, module and wireless radio frequency modules circuit were connected when GPS fixed a point with the school, as its working power. because dual power supply, even at continuous wet weather, also can be transformed into storage battery power supply under the inadequate situation sunshine, in water, carry out the detection of radioactive nuclide and radiant quantity incessantly with the assurance system, the processing of real time data and emission. the wireless transmission part is by the radio frequency chip circuit, antenna and radio receiver are formed. and the radio frequency chip circuit is selected the multiband radio transmitting and receiving chip nRF905 of Northern Europe integrated circuit company for use, it adopts and optimizes the GMSK modulation-demodulation technique, can be to be up to the speed transmission data of 76.8kb/s under the effective bandwidth of 155.6kHz, its passage, frequency range, output power can arrange by 14 bit registers with parameters such as exporting clock frequency. and the radio frequency chip circuit is connected with governor circuit by spi bus, by the MSP430 single-chip microcomputer it is finished necessary initial configuration and data reception, controls such as transmission. the radio-frequency antenna interface adopts differential antennae.
The main control part of remote monitoring is by antenna, less radio-frequency receiving trap, and principal computer is formed.Wherein the less radio-frequency receiving trap also designs at the nRF905 chip basis. and the whole system operation principle is as follows: the signal of detector collection is finished the data processing through main control microprocessor and is sent by the radio frequency chip circuit, after wireless signal receives via the less radio-frequency receiving trap, extract data, sending remote host computer to through the RS232 interface again. the principal computer platform software adopts Visual C++ exploitation, and with SQL Server as background data base, show monitoring result in real time in curve map/tables of data mode, dynamic real-time shows the monitoring result in a certain section time zone, but the also Monitoring Data in playback time zone, from background data base, inquire about all or historical data sometime as required, predetermined threshold value, Realtime Alerts.
Embodiment two:
Consult Fig. 1, Fig. 3, establish with the monitoring waters data acquisition of embodiment one identical macrostructure, data handle, the main control part of data-signal wireless transmit part and remote monitoring.Difference is radionuclide accumulation device 7, by 100 micron thickness, 0.45 the copper ferrocyanide gel that the cellulose nitrate permeable membrane of micron pore size, polyacrylamide and homogeneity polyacrylic resin combine assembles, this device and sodium iodide (NaI) scintillation detector (built-in caesium-137 standard radioactive source, the about 500Bq/15nCi of activity, can carry out energy to instrument calibrates automatically) connect, put into water, be used for detection and be combined in the concentration of caesium-137 nucleic in the copper ferrocyanide gel and total radiant quantity, this system can measure and be lower than 1Bq/m in the water 3The caesium of concentration-137 nucleic.
Module, power supply and principal computer and platform software adopted the identical configuration of embodiment one when present embodiment main control microprocessor, GPS located with the school.GPRS (General PacketRadio Service) module is adopted in wireless transmit and acceptance.The GPRS packet-switch technology is to utilize existing gsm system.Make mobile communication and data network unite two into one.Have characteristics such as very fast transmission, always online and price material benefit.GPRS network connects together by mobile server and Internet, can realize length apart from remote real-time monitoring, the control point in each different waters can also be connect simultaneously and form total real-time monitoring network system.

Claims (6)

1. real-time, on-the-spot underwater trace radiomaterial and radiation remote wireless monitoring system, it is characterized in that: by the data acquisition that is placed on the monitoring waters, handle, data-signal hop and remote monitoring main control part are formed, the data acquisition in monitoring waters wherein, handle, the data-signal hop comprises the surface platform that floats on the surface, be fixed on the floating drum above the surface platform, be installed in the floating drum by the GPS module, comprise microprocessor, the data handling system of data-switching and storage unit, the data that wireless communication module is formed are handled and the electric signal wireless base station apparatus, be installed in solar panel and emitting antenna on the floating drum, be fixed on the radioactive emission detector under the surface platform, the radionuclide accumulation device of being formed by permeable membrane and high-molecular gel that links with radioactive emission detector, sink to water-bed accumulator, connecting accumulator and data handles, the cable of signal transmission circuit and solar panel charging control circuit, the remote monitoring main control part comprises wireless signal receiver and main control computer.
2. according to real-time, on-the-spot underwater trace radiomaterial as claimed in claim 1 and radiation remote wireless monitoring system, it is characterized in that: radionuclide accumulation device wherein is by the cellulose nitrate permeable membrane of 100 micron thickness, 0.45 micron pore size, and the copper ferrocyanide gel that polyacrylamide and chelex-100 resin combine is formed.
3. according to as claimed in claim 1 real-time, on-the-spot underwater trace radiomaterial and radiation remote wireless monitoring system, it is characterized in that: radioactive emission detector wherein is built-in caesium-137, the standard radioactive source of the about 500Bq/15 nCi of activity, can carry out the energy high purity germanium detector of calibration automatically to instrument, the collection of control data wherein, handle, finish the wireless transmit of data and select the MSP430F1611 chip for use, the solar charging electric control circuit adopts 8 monolithic P87LPC767 of PHLIPS company, the radio frequency chip circuit is selected the multiband radio transmitting and receiving chip nRF905 of Northern Europe integrated circuit company for use, the radio frequency chip circuit is connected with governor circuit by spi bus, by MSP430 F1611 chip it is finished necessary initial configuration and data reception, send control, the radio-frequency antenna interface adopts differential antennae, the less radio-frequency receiving trap is based on the nRF905 chip in the remote monitoring main control part, wireless signal sends main control computer to through the RS232 interface, the main control computer platform software adopts Visual C++ exploitation, and with SQL Server as background data base.
4. according to real-time, on-the-spot underwater trace radiomaterial as claimed in claim 1 and radiation remote wireless monitoring system, it is characterized in that: the radionuclide accumulation device is assembled by the copper ferrocyanide gel that cellulose nitrate permeable membrane, polyacrylamide and the homogeneity polyacrylic resin of 100 micron thickness, 0.45 micron pore size combines, radiation detector is built-in caesium-137, the standard radioactive source of the about 500Bq/15 nCi of activity, can carry out the energy NaI scintillation detector of calibration automatically to instrument, the GPRS module is adopted in wireless transmit and acceptance.
5. according to real-time, on-the-spot underwater trace radiomaterial as claimed in claim 1 and radiation remote wireless monitoring system, it is characterized in that: the used radiation detector of system can be selected various high purity germanium detectors for use, the silicon drifting detector, the planar technology silicon detector, Si-PIN detector, silicon surface barrier detector, GSO:Ce, LSO:Ce, BSO, BGO, BaF 2Scintillation detector, cadmium telluride and tellurium zinc cadmium semiconductor detector, adamas detector, proportional counter.
6. according to real-time, on-the-spot underwater trace radiomaterial as claimed in claim 1 and radiation remote wireless monitoring system, it is characterized in that: wireless communication module is selected 3G for use, GSM/GPRS or CDMA module, bluetooth module, the satellite communication module, infrared module, IEEE802.11 module, IEEE802.15 module, the IEEE802.16 module, wireless RS-232 module, wireless UWB module, one or more in the radio USB module.
CN200910217733XA 2009-09-30 2009-09-30 Real-time and on-spot water trace radioactive substance and radiation remote wireless monitoring system CN102033240B (en)

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