CN105547409A - Passive nuclear material level measurement device and method - Google Patents
Passive nuclear material level measurement device and method Download PDFInfo
- Publication number
- CN105547409A CN105547409A CN201511023224.5A CN201511023224A CN105547409A CN 105547409 A CN105547409 A CN 105547409A CN 201511023224 A CN201511023224 A CN 201511023224A CN 105547409 A CN105547409 A CN 105547409A
- Authority
- CN
- China
- Prior art keywords
- sheet lead
- plastics
- signal
- sheath
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/288—X-rays; Gamma rays or other forms of ionising radiation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a passive nuclear material level measurement device and method, and belongs to the field of nuclear material level detection. The passive nuclear material level measurement device and method aim at solving the problems that when an existing nuclear material level detector carries out measurement, a radiation source is likely to harm measurement workers and the environment, and the stability of measurement results is poor. Radiation ray energy released by a measured material in a tank is measured through a gamma-radiation detector, whether the level of the measured material in the tank reaches a calibration value or not is judged according to energy change features, and then a measurement signal is output; the energy is the minimum when no medium exits in the tank, the energy is increased when a medium exits in the tank, and the change condition of the material level is judged through comparison. In addition, the radiation ray receiving area is increased as a lateral receiving mode is adopted, and the stability of final measurement results is improved as the number of received pulses is increased. The passive nuclear material level measurement device and method are suitable for carrying out material level detection on media containing radionuclides.
Description
Technical field
The invention belongs to core Level measurement field.
Background technology
For many years; the core material level detector of domestic application is all made up of detector, radiation source, secondary instrument three part; what adopt mostly is active radiation source; radiation intensity is larger; certain harm is had to user of service's safety and surrounding environment; along with the development of national economy, the requirement of environmental protection is also stricter, and the thing followed proposes new more demand to Level measurement technology.Existing publication number is the passive type core material level detector of 103712668A, and this kind of core material level detector adopts the mode of end surface measurement, and at detection process, the receiving area of radiant rays is little, received pulse number is few, makes the poor stability of measurement result.
Summary of the invention
The present invention is that the radioactive nuclide contained to solve existing core material level detector comprises radiation source, when measuring, this radiation source easily works the mischief to survey crew and environment, and the problem of measurement result poor stability, now provides passive core article position measuring device and method.
Passive core article position measuring device, it comprises: gamma radiation detector 8, power supply 20, signal processor and data processing module;
Gamma radiation detector 8 comprises: detector connection cover 7, probe body 9, sheet lead sheath rubber cushion 10, sheet lead sheath 11, photomultiplier 12, stainless steel sheath 13, scintillation crystal 14, fastening pad 15, protection sheet lead 16, detector bottom 17 and dividing potential drop emitter follower 25;
Signal processor comprises: amplification shaping device, threshold value discriminator and pulse analyzer;
Sheet lead sheath 11 comprises sheet lead portion, one, plastics and two, plastics, sheet lead portion and one, plastics surround in a cylindrical shape, and the circumferential ratio of sheet lead portion and one, plastics is 2:1, two, plastics are cylindrical, and diameter is identical with the cylinder that sheet lead portion and plastics surround, one end of two, one end and the plastics of cylinder is connected, and one, plastics and two, plastics are in integral structure;
Stainless steel sheath 13 is cylindrical, the end of this stainless steel sheath 13 is sealed by protection sheet lead 16, the head end of stainless steel sheath 13 is sealed by the sealed end of detector connection cover 7, photomultiplier 12, it is inner that scintillation crystal 14 and fastening pad 15 are all positioned at stainless steel sheath 13, fastening pad 15 is fixed on protection sheet lead 16, scintillation crystal 14 is between photomultiplier 12 and fastening pad 15, sheet lead sheath 11 is socketed in stainless steel sheath 13 outside surface, and the cylindrical portions that in sheet lead sheath 11, sheet lead portion and plastics surround is positioned at outside scintillation crystal 14, sheet lead sheath rubber cushion 10 is socketed in outside sheet lead sheath 11, probe body 9 is socketed in outside sheet lead sheath rubber cushion 10, the end of sheet lead sheath rubber cushion 10 is sealed by detector bottom 17,
Photomultiplier 12 gathers the photoelectron signal that scintillation crystal 14 sends, the photo-multiplier signal output part of photomultiplier 12 connects the photo-multiplier signal input part of dividing potential drop emitter follower 25, dividing potential drop emitter follower 25 is also for being photomultiplier 12 supercharging, the pulse signal output end of dividing potential drop emitter follower 25 connects the pulse signal input terminal of amplification shaping device, the amplifying signal input end of the amplifying signal output terminal connect threshold discriminator of amplification shaping device, the nucleic signal output part of threshold value discriminator connects the nucleic signal input part of pulse analyzer, the Radionuclide analysis signal input part of the analytic signal output terminal connection data processing module of pulse analyzer,
Data processing module also comprises as lower unit:
Measurement parameter collecting unit: when containing radioactive nuclide medium in tank body to be measured, the analytic signal that Real-time Collection pulse analyzer exports is as measurement parameter;
Calibrating parameters collecting unit; When not containing radioactive nuclide medium in tank body to be measured, the analytic signal that acquisition pulse analyzer exports is as calibrating parameters;
Judging unit: measurement parameter and calibrating parameters are compared, judges whether measurement parameter is greater than calibrating parameters, is, the radioactivity material in tank body to be measured reaches spacing height, otherwise the radioactivity material in tank body to be measured does not reach spacing height.
Passive core article position measuring method, the method realizes based on lower device, and described device comprises: gamma radiation detector 8, power supply 20 and signal processor;
Gamma radiation detector 8 comprises: detector connection cover 7, probe body 9, sheet lead sheath rubber cushion 10, sheet lead sheath 11, photomultiplier 12, stainless steel sheath 13, scintillation crystal 14, fastening pad 15, protection sheet lead 16, detector bottom 17 and dividing potential drop emitter follower 25;
Signal processor comprises: amplification shaping device, threshold value discriminator and pulse analyzer;
Sheet lead sheath 11 comprises sheet lead portion, one, plastics and two, plastics, sheet lead portion and one, plastics surround in a cylindrical shape, and the circumferential ratio of sheet lead portion and one, plastics is 2:1, two, plastics are cylindrical, and diameter is identical with the cylinder that sheet lead portion and plastics surround, one end of two, one end and the plastics of cylinder is connected, and one, plastics and two, plastics are in integral structure;
Stainless steel sheath 13 is cylindrical, the end of this stainless steel sheath 13 is sealed by protection sheet lead 16, the head end of stainless steel sheath 13 is sealed by the sealed end of detector connection cover 7, photomultiplier 12, it is inner that scintillation crystal 14 and fastening pad 15 are all positioned at stainless steel sheath 13, fastening pad 15 is fixed on protection sheet lead 16, scintillation crystal 14 is between photomultiplier 12 and fastening pad 15, sheet lead sheath 11 is socketed in stainless steel sheath 13 outside surface, and the cylindrical portions that in sheet lead sheath 11, sheet lead portion and plastics surround is positioned at outside scintillation crystal 14, sheet lead sheath rubber cushion 10 is socketed in outside sheet lead sheath 11, probe body 9 is socketed in outside sheet lead sheath rubber cushion 10, the end of sheet lead sheath rubber cushion 10 is sealed by detector bottom 17,
Photomultiplier 12 gathers the photoelectron signal that scintillation crystal 14 sends, the photo-multiplier signal output part of photomultiplier 12 connects the photo-multiplier signal input part of dividing potential drop emitter follower 25, dividing potential drop emitter follower 25 is also for being photomultiplier 12 supercharging, the pulse signal output end of dividing potential drop emitter follower 25 connects the pulse signal input terminal of amplification shaping device, the amplifying signal input end of the amplifying signal output terminal connect threshold discriminator of amplification shaping device, the nucleic signal output part of threshold value discriminator connects the nucleic signal input part of pulse analyzer;
Said method comprising the steps of:
Demarcating steps: not containing the analytic signal that acquisition pulse analyzer during radioactive nuclide medium obtains in tank body to be measured, and using this analytic signal as calibrating parameters;
Measuring process: time in tank body to be measured containing radioactive nuclide medium, the analytic signal that Real-time Collection pulse analyzer obtains, and using this analytic signal as measurement parameter;
Determining step: measurement parameter and calibrating parameters are compared, judges whether measurement parameter is greater than calibrating parameters, is, the radioactivity material in tank body to be measured reaches spacing height, and terminates to measure; Otherwise the radioactivity material in tank body to be measured does not reach spacing height, and return measurement step re-starts measurement.
Passive nucleon article position measuring device of the present invention, the radiation ray energy that in tank body, substances to be measured self discharges is measured by gamma radiation detector, and obtain the thing position of measured matter in tank body according to its energy changing characteristics and whether reach calibration value, and then export measuring-signal, when in tank body without medium time, energy is minimum, measure the umber of pulse obtained minimum, when there being medium in tank body, energy quantitative change is large, measure the umber of pulse obtained and become many, judged the situation of change of thing position by contrast.And passive nucleon article position measuring device of the present invention, the form adopting side to receive adds the receiving area of radiant rays, and the number of pulses of reception increases, and makes final measurement result stability be improved.
Passive nucleon article position measuring method of the present invention, the radiation ray energy that in tank body, substances to be measured self discharges is measured by gamma radiation detector, and obtain ray energy size contained by measured matter in tank body according to its energy changing characteristics, finally the parameter of measurement and calibrating parameters are made comparisons, thus determine whether thing position reaches standard.
Tank body to be measured of the present invention does not contact with measured medium simultaneously, without the need to perforate on tank body, and does not use radiation source, safe and reliable, can not work the mischief to personnel and environment.
Passive nucleon article position measuring device of the present invention and method, be applicable to carry out Level measurement to the medium containing radioactive nuclide.
Accompanying drawing explanation
Fig. 1 is the cut-open view of passive nucleon article position measuring device of the present invention;
Fig. 2 is the A portion enlarged drawing of Fig. 1;
Fig. 3 is the electrical structure schematic diagram of passive nucleon article position measuring device of the present invention;
Fig. 4 is the one-piece construction schematic diagram of passive nucleon article position measuring device of the present invention;
Fig. 5 is the structural representation in the sheet lead sheath sheet lead portion described in embodiment one;
Fig. 6 is the process flow diagram of the passive nucleon article position measuring method described in embodiment seven.
Embodiment
Embodiment one: illustrate present embodiment referring to figs. 1 through Fig. 5, the passive core article position measuring device described in present embodiment, it comprises: gamma radiation detector 8, power supply 20, signal processor and data processing module;
Gamma radiation detector 8 comprises: detector connection cover 7, probe body 9, sheet lead sheath rubber cushion 10, sheet lead sheath 11, photomultiplier 12, stainless steel sheath 13, scintillation crystal 14, fastening pad 15, protection sheet lead 16, detector bottom 17 and dividing potential drop emitter follower 25;
Signal processor comprises: amplification shaping device, threshold value discriminator and pulse analyzer;
Sheet lead sheath 11 comprises sheet lead portion, one, plastics and two, plastics, sheet lead portion and one, plastics surround in a cylindrical shape, and the circumferential ratio of sheet lead portion and one, plastics is 2:1, two, plastics are cylindrical, and diameter is identical with the cylinder that sheet lead portion and plastics surround, one end of two, one end and the plastics of cylinder is connected, and one, plastics and two, plastics are in integral structure;
Stainless steel sheath 13 is cylindrical, the end of this stainless steel sheath 13 is sealed by protection sheet lead 16, the head end of stainless steel sheath 13 is sealed by the sealed end of detector connection cover 7, photomultiplier 12, it is inner that scintillation crystal 14 and fastening pad 15 are all positioned at stainless steel sheath 13, fastening pad 15 is fixed on protection sheet lead 16, scintillation crystal 14 is between photomultiplier 12 and fastening pad 15, sheet lead sheath 11 is socketed in stainless steel sheath 13 outside surface, and the cylindrical portions that in sheet lead sheath 11, sheet lead portion and plastics surround is positioned at outside scintillation crystal 14, sheet lead sheath rubber cushion 10 is socketed in outside sheet lead sheath 11, probe body 9 is socketed in outside sheet lead sheath rubber cushion 10, the end of sheet lead sheath rubber cushion 10 is sealed by detector bottom 17,
Photomultiplier 12 gathers the photoelectron signal that scintillation crystal 14 sends, the photo-multiplier signal output part of photomultiplier 12 connects the photo-multiplier signal input part of dividing potential drop emitter follower 25, dividing potential drop emitter follower 25 is also for being photomultiplier 12 supercharging, the pulse signal output end of dividing potential drop emitter follower 25 connects the pulse signal input terminal of amplification shaping device, the amplifying signal input end of the amplifying signal output terminal connect threshold discriminator of amplification shaping device, the nucleic signal output part of threshold value discriminator connects the nucleic signal input part of pulse analyzer, the Radionuclide analysis signal input part of the analytic signal output terminal connection data processing module of pulse analyzer,
Data processing module also comprises as lower unit:
Measurement parameter collecting unit: when containing radioactive nuclide medium in tank body to be measured, the analytic signal that Real-time Collection pulse analyzer exports is as measurement parameter;
Calibrating parameters collecting unit; When not containing radioactive nuclide medium in tank body to be measured, the analytic signal that acquisition pulse analyzer exports is as calibrating parameters;
Judging unit: measurement parameter and calibrating parameters are compared, judges whether measurement parameter is greater than calibrating parameters, is, the radioactivity material in tank body to be measured reaches spacing height, otherwise the radioactivity material in tank body to be measured does not reach spacing height.
In present embodiment, the irradiation with radiation radiated when the radiativity material in tank body to be measured is on scintillation crystal 14, scintillation crystal 14 is excited to radiate photoelectron, now photoelectronic intensity responded to by photomultiplier 12, and emitter follower part induced signal being sent to dividing potential drop emitter follower 25 strengthens, the divided fraction of dividing potential drop emitter follower 25 also carries out supercharging for photomultiplier 12 simultaneously.The photoelectron intensity level of standard is set with in threshold value discriminator, when threshold value discriminator receives the photoelectron signal of amplification shaping device transmission, if this photoelectron signal is greater than the photoelectron intensity level of standard, prove that the photoelectron signal now obtained reaches standard, and then can be analyzed by pulse analyzer, if this photoelectron signal is less than the photoelectron intensity level of standard, then current detection to photoelectron signal can not reach standard, then re-start collection.Due to the special construction of sheet lead sheath 11, radiant rays is made to be radiated scintillation crystal 14 from one, the plastics of sheet lead sheath 11, namely radiation is carried out in the side of gamma radiation detector 8, relative to the mode of existing end surface measurement, add the receiving area of radiant rays, the number of pulses received increases, and makes final measurement result stability improve 60%.
Closely cooperate between sheet lead sheath rubber cushion 10 and sheet lead sheath 11, sheet lead sheath 11 and protection sheet lead 16, for shielding natural natural ray, improve the Measurement sensibility of product.Fastening pad 15 is sponge, is filled in completely between scintillation crystal 14 and protection sheet lead 16, prevents hard contact damage scintillation crystal 14, simultaneously can also fastening scintillation crystal 14 and photomultiplier 12.
Embodiment two: present embodiment is described further the passive core article position measuring device described in embodiment one, and in present embodiment, scintillation crystal 14 is plastic crystal or sodium iodide crystal.
In present embodiment, adopt plastic crystal or sodium iodide crystal, cost-saving.
Embodiment three: present embodiment is described further the passive core article position measuring device described in embodiment one, and in present embodiment, it also comprises: display unit, input block and output unit;
The display output terminal of the display input end connection data processing module of display unit, this display unit is LCDs 18,
The setting parameter signal input end of the setting parameter signal output terminal connection data processing module of input block,
The on-off model output terminal of the on-off model input end connection data processing module of output unit.
In present embodiment, output unit comprises: output circuit and relay, and the result of data processing module connects output unit by on-off model output terminal; Input block is made up of button, mainly realizes parameter modification and setting; Display unit display measurement parameter value, utilizes LCDs to show numeral, more accurately and directly perceived.
Embodiment four: present embodiment is described further the passive core article position measuring device described in embodiment three, in present embodiment, it also comprises: host shell lid 1, display unit back up pad 2, processor back up pad 3, power supply back up pad 4, host shell seat 5, fixed mount 6, power supply 20, line connector 26 and photomultiplier holder 27;
It is inner that line connector 26 is positioned at detector connection cover 7, and be together fixed on detector connection cover 7 by photomultiplier holder 27 and photomultiplier 12, dividing potential drop emitter follower 25 is fixed on line connector 26, dividing potential drop emitter follower 25 is connected with power supply 20 by the signal-transmitting cable 24 on line connector 26, the end of fixed mount 6 is fixed on the link of detector connection cover 7, the end of host shell seat 5 is fixed on the head end of fixed mount 6, power supply back up pad 4 is fixed on the head end of host shell seat 5, signal-transmitting cable 24 is successively through fixed mount 6, host shell seat 5 is connected with power supply 20 with power supply back up pad 4, power supply 20 is fixed in power supply back up pad 4, processor back up pad 3 is fixed in power supply back up pad 4 by connecting copper post 19, display unit back up pad 2 is fixed in processor back up pad 3 by connecting copper post 19, signal processor is fixed in processor back up pad 3, LCDs 18 is fixed in display unit back up pad 2,
Host shell lid 1 can snap onto on host shell seat 5.
In present embodiment; when host shell lid 1 snaps onto on host shell seat 5; it is inner that the display unit back up pad 2 that host shell seat 5 carries, processor back up pad 3, power supply back up pad 4 and LCDs 18 are all positioned at host shell lid 1, and all devices of host shell lid 1 to its inside play a protective role.
Embodiment five: present embodiment is described further the passive core article position measuring device described in embodiment four, and in present embodiment, the opening part of host shell lid 1 is provided with waterproof case 28.
Embodiment six: present embodiment is described further the passive core article position measuring device described in embodiment four, and in present embodiment, it also comprises: splicing ear 21, signal cable 22 and locking wire mouth 23;
Locking wire mouth 23 is fixed on the sidewall of host shell seat 5, for locking signal cable 22, splicing ear 21 is for being connected one end of signal cable 22 with signal processor, and the other end of signal cable 22 is connected with data processing module with locking wire mouth 23 through host shell seat 5.
Embodiment seven: illustrate present embodiment, the passive core article position measuring method described in present embodiment with reference to Fig. 1 and 6, the method realizes based on lower device, and described device comprises: gamma radiation detector 8, power supply 20 and signal processor;
Gamma radiation detector 8 comprises: detector connection cover 7, probe body 9, sheet lead sheath rubber cushion 10, sheet lead sheath 11, photomultiplier 12, stainless steel sheath 13, scintillation crystal 14, fastening pad 15, protection sheet lead 16, detector bottom 17 and dividing potential drop emitter follower 25;
Signal processor comprises: amplification shaping device, threshold value discriminator and pulse analyzer;
Sheet lead sheath 11 comprises sheet lead portion, one, plastics and two, plastics, sheet lead portion and one, plastics surround in a cylindrical shape, and the circumferential ratio of sheet lead portion and one, plastics is 2:1, two, plastics are cylindrical, and diameter is identical with the cylinder that sheet lead portion and plastics surround, one end of two, one end and the plastics of cylinder is connected, and one, plastics and two, plastics are in integral structure;
Stainless steel sheath 13 is cylindrical, the end of this stainless steel sheath 13 is sealed by protection sheet lead 16, the head end of stainless steel sheath 13 is sealed by the sealed end of detector connection cover 7, photomultiplier 12, it is inner that scintillation crystal 14 and fastening pad 15 are all positioned at stainless steel sheath 13, fastening pad 15 is fixed on protection sheet lead 16, scintillation crystal 14 is between photomultiplier 12 and fastening pad 15, sheet lead sheath 11 is socketed in stainless steel sheath 13 outside surface, and the cylindrical portions that in sheet lead sheath 11, sheet lead portion and plastics surround is positioned at outside scintillation crystal 14, sheet lead sheath rubber cushion 10 is socketed in outside sheet lead sheath 11, probe body 9 is socketed in outside sheet lead sheath rubber cushion 10, the end of sheet lead sheath rubber cushion 10 is sealed by detector bottom 17,
Photomultiplier 12 gathers the photoelectron signal that scintillation crystal 14 sends, the photo-multiplier signal output part of photomultiplier 12 connects the photo-multiplier signal input part of dividing potential drop emitter follower 25, dividing potential drop emitter follower 25 is also for being photomultiplier 12 supercharging, the pulse signal output end of dividing potential drop emitter follower 25 connects the pulse signal input terminal of amplification shaping device, the amplifying signal input end of the amplifying signal output terminal connect threshold discriminator of amplification shaping device, the nucleic signal output part of threshold value discriminator connects the nucleic signal input part of pulse analyzer;
Said method comprising the steps of:
Demarcating steps: not containing the analytic signal that acquisition pulse analyzer during radioactive nuclide medium obtains in tank body to be measured, and using this analytic signal as calibrating parameters;
Measuring process: time in tank body to be measured containing radioactive nuclide medium, the analytic signal that Real-time Collection pulse analyzer obtains, and using this analytic signal as measurement parameter;
Determining step: measurement parameter and calibrating parameters are compared, judges whether measurement parameter is greater than calibrating parameters, is, the radioactivity material in tank body to be measured reaches spacing height, and terminates to measure; Otherwise the radioactivity material in tank body to be measured does not reach spacing height, and return measurement step re-starts measurement.
Claims (7)
1. passive core article position measuring device, it is characterized in that, it comprises: gamma radiation detector (8), power supply (20), signal processor and data processing module;
Gamma radiation detector (8) comprising: detector connection cover (7), probe body (9), sheet lead sheath rubber cushion (10), sheet lead sheath (11), photomultiplier (12), stainless steel sheath (13), scintillation crystal (14), fastening pad (15), protection sheet lead (16), detector bottom (17) and dividing potential drop emitter follower (25);
Signal processor comprises: amplification shaping device, threshold value discriminator and pulse analyzer;
Sheet lead sheath (11) comprises sheet lead portion, one, plastics and two, plastics, sheet lead portion and one, plastics surround in a cylindrical shape, and the circumferential ratio of sheet lead portion and one, plastics is 2:1, two, plastics are cylindrical, and diameter is identical with the cylinder that sheet lead portion and plastics surround, one end of two, one end and the plastics of cylinder is connected, and one, plastics and two, plastics are in integral structure;
Stainless steel sheath (13) is cylindrical, the end of this stainless steel sheath (13) is by protection sheet lead (16) sealing, the head end of stainless steel sheath (13) is sealed by the sealed end of detector connection cover (7), photomultiplier (12), it is inner that scintillation crystal (14) and fastening pad (15) are all positioned at stainless steel sheath (13), fastening pad (15) is fixed in protection sheet lead (16), scintillation crystal (14) is positioned between photomultiplier (12) and fastening pad (15), sheet lead sheath (11) is socketed in stainless steel sheath (13) outside surface, and the cylindrical portions that in sheet lead sheath (11), sheet lead portion and plastics surround is positioned at scintillation crystal (14) outside, sheet lead sheath rubber cushion (10) is socketed in sheet lead sheath (11) outside, probe body (9) is socketed in sheet lead sheath rubber cushion (10) outside, the end of sheet lead sheath rubber cushion (10) is by detector bottom (17) sealing,
Photomultiplier (12) gathers the photoelectron signal that scintillation crystal (14) sends, the photo-multiplier signal output part of photomultiplier (12) connects the photo-multiplier signal input part of dividing potential drop emitter follower (25), dividing potential drop emitter follower (25) is also for being photomultiplier (12) supercharging, the pulse signal output end of dividing potential drop emitter follower (25) connects the pulse signal input terminal of amplification shaping device, the amplifying signal input end of the amplifying signal output terminal connect threshold discriminator of amplification shaping device, the nucleic signal output part of threshold value discriminator connects the nucleic signal input part of pulse analyzer, the Radionuclide analysis signal input part of the analytic signal output terminal connection data processing module of pulse analyzer,
Data processing module also comprises as lower unit:
Measurement parameter collecting unit: when containing radioactive nuclide medium in tank body to be measured, the analytic signal that Real-time Collection pulse analyzer exports is as measurement parameter;
Calibrating parameters collecting unit; When not containing radioactive nuclide medium in tank body to be measured, the analytic signal that acquisition pulse analyzer exports is as calibrating parameters;
Judging unit: measurement parameter and calibrating parameters are compared, judges whether measurement parameter is greater than calibrating parameters, is, the radioactivity material in tank body to be measured reaches spacing height, otherwise the radioactivity material in tank body to be measured does not reach spacing height.
2. passive core article position measuring device according to claim 1, is characterized in that, scintillation crystal (14) is plastic crystal or sodium iodide crystal.
3. passive core article position measuring device according to claim 1, it is characterized in that, it also comprises: display unit, input block and output unit;
The display output terminal of the display input end connection data processing module of display unit, this display unit is LCDs (18),
The setting parameter signal input end of the setting parameter signal output terminal connection data processing module of input block,
The on-off model output terminal of the on-off model input end connection data processing module of output unit.
4. passive core article position measuring device according to claim 3, it is characterized in that, it also comprises: host shell lid (1), display unit back up pad (2), processor back up pad (3), power supply back up pad (4), host shell seat (5), fixed mount (6), power supply (20), line connector (26) and photomultiplier holder (27);
It is inner that line connector (26) is positioned at detector connection cover (7), and be together fixed on detector connection cover (7) by photomultiplier holder (27) and photomultiplier (12), dividing potential drop emitter follower (25) is fixed on line connector (26), dividing potential drop emitter follower (25) is connected with power supply (20) by the signal-transmitting cable (24) on line connector (26), the end of fixed mount (6) is fixed on the link of detector connection cover (7), the end of host shell seat (5) is fixed on the head end of fixed mount (6), power supply back up pad (4) is fixed on the head end of host shell seat (5), signal-transmitting cable (24) is successively through fixed mount (6), host shell seat (5) is connected with power supply (20) with power supply back up pad (4), power supply (20) is fixed in power supply back up pad (4), processor back up pad (3) is fixed in power supply back up pad (4) by connecting copper post (19), display unit back up pad (2) is fixed in processor back up pad (3) by connecting copper post (19), signal processor is fixed in processor back up pad (3), LCDs (18) is fixed in display unit back up pad (2),
Host shell lid (1) can snap onto on host shell seat (5).
5. passive core article position measuring device according to claim 4, is characterized in that, the opening part of host shell lid (1) is provided with waterproof case (28).
6. passive core article position measuring device according to claim 4, it is characterized in that, it also comprises: splicing ear (21), signal cable (22) and locking wire mouth (23);
Locking wire mouth (23) is fixed on the sidewall of host shell seat (5), for locking signal cable (22), splicing ear (21) is for being connected one end of signal cable (22) with signal processor, and the other end of signal cable (22) is connected with data processing module with locking wire mouth (23) through host shell seat (5).
7. passive core article position measuring method, is characterized in that, the method realizes based on lower device, and described device comprises: gamma radiation detector (8), power supply (20) and signal processor;
Gamma radiation detector (8) comprising: detector connection cover (7), probe body (9), sheet lead sheath rubber cushion (10), sheet lead sheath (11), photomultiplier (12), stainless steel sheath (13), scintillation crystal (14), fastening pad (15), protection sheet lead (16), detector bottom (17) and dividing potential drop emitter follower (25);
Signal processor comprises: amplification shaping device, threshold value discriminator and pulse analyzer;
Sheet lead sheath (11) comprises sheet lead portion, one, plastics and two, plastics, sheet lead portion and one, plastics surround in a cylindrical shape, and the circumferential ratio of sheet lead portion and one, plastics is 2:1, two, plastics are cylindrical, and diameter is identical with the cylinder that sheet lead portion and plastics surround, one end of two, one end and the plastics of cylinder is connected, and one, plastics and two, plastics are in integral structure;
Stainless steel sheath (13) is cylindrical, the end of this stainless steel sheath (13) is by protection sheet lead (16) sealing, the head end of stainless steel sheath (13) is sealed by the sealed end of detector connection cover (7), photomultiplier (12), it is inner that scintillation crystal (14) and fastening pad (15) are all positioned at stainless steel sheath (13), fastening pad (15) is fixed in protection sheet lead (16), scintillation crystal (14) is positioned between photomultiplier (12) and fastening pad (15), sheet lead sheath (11) is socketed in stainless steel sheath (13) outside surface, and the cylindrical portions that in sheet lead sheath (11), sheet lead portion and plastics surround is positioned at scintillation crystal (14) outside, sheet lead sheath rubber cushion (10) is socketed in sheet lead sheath (11) outside, probe body (9) is socketed in sheet lead sheath rubber cushion (10) outside, the end of sheet lead sheath rubber cushion (10) is by detector bottom (17) sealing,
Photomultiplier (12) gathers the photoelectron signal that scintillation crystal (14) sends, the photo-multiplier signal output part of photomultiplier (12) connects the photo-multiplier signal input part of dividing potential drop emitter follower (25), dividing potential drop emitter follower (25) is also for being photomultiplier (12) supercharging, the pulse signal output end of dividing potential drop emitter follower (25) connects the pulse signal input terminal of amplification shaping device, the amplifying signal input end of the amplifying signal output terminal connect threshold discriminator of amplification shaping device, the nucleic signal output part of threshold value discriminator connects the nucleic signal input part of pulse analyzer,
Said method comprising the steps of:
Demarcating steps: not containing the analytic signal that acquisition pulse analyzer during radioactive nuclide medium obtains in tank body to be measured, and using this analytic signal as calibrating parameters;
Measuring process: time in tank body to be measured containing radioactive nuclide medium, the analytic signal that Real-time Collection pulse analyzer obtains, and using this analytic signal as measurement parameter;
Determining step: measurement parameter and calibrating parameters are compared, judges whether measurement parameter is greater than calibrating parameters, is, the radioactivity material in tank body to be measured reaches spacing height, and terminates to measure; Otherwise the radioactivity material in tank body to be measured does not reach spacing height, and return measurement step re-starts measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511023224.5A CN105547409B (en) | 2015-12-30 | 2015-12-30 | Passive core article position measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511023224.5A CN105547409B (en) | 2015-12-30 | 2015-12-30 | Passive core article position measuring device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105547409A true CN105547409A (en) | 2016-05-04 |
| CN105547409B CN105547409B (en) | 2018-10-09 |
Family
ID=55826761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511023224.5A Active CN105547409B (en) | 2015-12-30 | 2015-12-30 | Passive core article position measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105547409B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884686A (en) * | 2019-03-18 | 2019-06-14 | 中国原子能科学研究院 | A kind of source positions detection device |
| CN109974811A (en) * | 2019-04-15 | 2019-07-05 | 上海沃纳机电设备有限公司 | A kind of array radiation level-sensing device and its measurement method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2565963A (en) * | 1948-01-02 | 1951-08-28 | Ollie W Graham | Method of and apparatus for making liquid level determinations |
| RU2006000C1 (en) * | 1992-01-03 | 1994-01-15 | Владимир Алексеевич Ролдугин | Method of contactless position check of level |
| CN2379811Y (en) * | 1999-06-17 | 2000-05-24 | 深圳奥沃国际科技发展有限公司 | Device for measuring radiation |
| CN2694239Y (en) * | 2003-11-13 | 2005-04-20 | 黑龙江省中贝技术有限公司 | Digital integrative gamma ray object position meter |
| CN2744444Y (en) * | 2005-06-10 | 2005-12-07 | 包头新日立科贸发展有限公司 | Liquid steel level detector of continuous casting crystallizer |
| CN202903278U (en) * | 2012-12-03 | 2013-04-24 | 黑龙江省中贝技术有限公司 | Continuous nuclear material level monitoring detector |
| CN103712668A (en) * | 2014-01-22 | 2014-04-09 | 黑龙江省中贝技术有限公司 | Passive nuclear material level detector and detecting method |
| CN203657885U (en) * | 2014-01-22 | 2014-06-18 | 黑龙江省中贝技术有限公司 | Passive nuclear material level detector |
| CN204269568U (en) * | 2014-08-19 | 2015-04-15 | 开封市测控技术有限公司 | The explosion-proof grey sub sensor of a kind of natural Gamma ray |
| DE102013110972A1 (en) * | 2013-10-02 | 2015-04-23 | Endress + Hauser Gmbh + Co. Kg | Radiometric back-scattering gauge |
| CN104934087A (en) * | 2015-06-12 | 2015-09-23 | 同方威视技术股份有限公司 | Lead shielding structure of non-detection surface of scintillant |
-
2015
- 2015-12-30 CN CN201511023224.5A patent/CN105547409B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2565963A (en) * | 1948-01-02 | 1951-08-28 | Ollie W Graham | Method of and apparatus for making liquid level determinations |
| RU2006000C1 (en) * | 1992-01-03 | 1994-01-15 | Владимир Алексеевич Ролдугин | Method of contactless position check of level |
| CN2379811Y (en) * | 1999-06-17 | 2000-05-24 | 深圳奥沃国际科技发展有限公司 | Device for measuring radiation |
| CN2694239Y (en) * | 2003-11-13 | 2005-04-20 | 黑龙江省中贝技术有限公司 | Digital integrative gamma ray object position meter |
| CN2744444Y (en) * | 2005-06-10 | 2005-12-07 | 包头新日立科贸发展有限公司 | Liquid steel level detector of continuous casting crystallizer |
| CN202903278U (en) * | 2012-12-03 | 2013-04-24 | 黑龙江省中贝技术有限公司 | Continuous nuclear material level monitoring detector |
| DE102013110972A1 (en) * | 2013-10-02 | 2015-04-23 | Endress + Hauser Gmbh + Co. Kg | Radiometric back-scattering gauge |
| CN103712668A (en) * | 2014-01-22 | 2014-04-09 | 黑龙江省中贝技术有限公司 | Passive nuclear material level detector and detecting method |
| CN203657885U (en) * | 2014-01-22 | 2014-06-18 | 黑龙江省中贝技术有限公司 | Passive nuclear material level detector |
| CN204269568U (en) * | 2014-08-19 | 2015-04-15 | 开封市测控技术有限公司 | The explosion-proof grey sub sensor of a kind of natural Gamma ray |
| CN104934087A (en) * | 2015-06-12 | 2015-09-23 | 同方威视技术股份有限公司 | Lead shielding structure of non-detection surface of scintillant |
Non-Patent Citations (3)
| Title |
|---|
| 吴斯彧，顾玲娟，瑚琦，张立成: "无源核子料位计中脉冲峰值采样系统的设计", 《电子设计工程》 * |
| 罗向东，赵孝文，徐晓秋，李北城: "基于多微处理器主从式核物位监测系统的研制", 《自动化技术与应用》 * |
| 罗向东，赵孝文，徐晓秋，李北城: "数字式一体化γ射线物位计的研制", 《科技创新导报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884686A (en) * | 2019-03-18 | 2019-06-14 | 中国原子能科学研究院 | A kind of source positions detection device |
| CN109884686B (en) * | 2019-03-18 | 2020-12-11 | 中国原子能科学研究院 | Radioactive source position detection device |
| CN109974811A (en) * | 2019-04-15 | 2019-07-05 | 上海沃纳机电设备有限公司 | A kind of array radiation level-sensing device and its measurement method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105547409B (en) | 2018-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103712668B (en) | Passive type core material level detector and detection method | |
| CN103928068B (en) | The system and method for quantitative measurement PWR nuclear power plant primary Ioops coolant slip | |
| CN101937090B (en) | High-sensitivity wide-range X-gamma ambient dose equivalent rate monitor probe | |
| CN105068108A (en) | Multifunctional neutron/gamma detector based on single probe | |
| JP6434206B2 (en) | System for detecting gamma rays from radiation specimens | |
| CN101750132B (en) | Radiometrical level or density measurement | |
| CN207408601U (en) | A kind of neutron based on CLYC crystal, gamma dose measurement system | |
| CN109975854B (en) | Method and system for pulse waveform discrimination | |
| JP6301386B2 (en) | Radioactive contamination inspection equipment | |
| CN102540270A (en) | Device for monitoring and identifying radioactive substances | |
| CN105547409A (en) | Passive nuclear material level measurement device and method | |
| CN114924306A (en) | Online monitoring system and method for radiation state of radioactive substance storage container | |
| EP2615475A2 (en) | Radiation sensor system | |
| CN208334663U (en) | low background α, β measuring device | |
| CN205280181U (en) | Passive nuclear thing position measuring device | |
| CN204705719U (en) | A kind of portable radioactive contamination meter | |
| CN105486379B (en) | Adjustable sigmatron backscattering article position measuring method | |
| JP2013156116A (en) | Method and apparatus for measuring radioactive concentration in domestic animal body | |
| JP6029054B2 (en) | Radioactive cesium simple measuring method and portable radioactive cesium simple measuring device | |
| CN107655917A (en) | A kind of water body radiating particle activity detection analysis instrument | |
| CN204142960U (en) | Based on the online Radiation Protection Monitoring system in core medicine production and circulation field of Internet of Things | |
| CN202013424U (en) | Novel portable gamma energy spectrometer | |
| CN209606620U (en) | A kind of radiation-measurment equipment | |
| CN215005887U (en) | Fixed measuring device for depth position with directional dose equivalent rate of 7mm | |
| CN205809315U (en) | A kind of radionuclide rapid detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Xiaowen Inventor after: Li Yan Inventor after: Zhao Hongtao Inventor after: Yan Haixia Inventor after: Gao Yajuan Inventor after: Fan Qingli Inventor after: Jiang Jicheng Inventor before: Zhao Xiaowen Inventor before: Gao Yajuan Inventor before: Li Beicheng Inventor before: Wan Zhiwei Inventor before: Pan Zhikui |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |