CN105492929B - Radiation detecting apparatus and radiation dose measurement processing method - Google Patents
Radiation detecting apparatus and radiation dose measurement processing method Download PDFInfo
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- CN105492929B CN105492929B CN201480048230.3A CN201480048230A CN105492929B CN 105492929 B CN105492929 B CN 105492929B CN 201480048230 A CN201480048230 A CN 201480048230A CN 105492929 B CN105492929 B CN 105492929B
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
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Abstract
It is an object of the invention to provide a kind of radiation detecting apparatus, radiation dose measurement processing method and radiation dose measurement processing routine, light detection sensitivity can be also improved even with the simple photo detector that light-receiving area is smaller and light detection sensitivity is relatively low, so as to improve radioactive ray detection sensitivity.Therefore, using following structure, possessing：Radioactive ray test section (2), the radioactive ray test section (2) generates radiation detection signal according to the energy of incident radioactive ray (R)；Accidental resonance portion (7), the accidental resonance portion (7) makes the radiation detection signal that radioactive ray test section (2) is generated produce Stochastic Resonance Phenomenon to carry out the radiation detection signal waveform recovery, and exports thus obtained waveform recovery signal；And operational part (8), the waveform recovery signal measurement radiological dose that the operational part (8) is generated based on accidental resonance portion (7).
Description
Technical field
The present invention relates to middle radiation detecting apparatus, the radiation dose measurement treatment side for determining radiological dose such as nuclear facilities
Method and radiation dose measurement processing routine.
Background technology
In the past, in the radiation detecting apparatus of the detection radioactive pollution in nuclear facilities etc., it is provided with scintillator
Detection means.As a kind of solid scintillator of the scintillator, have by the organic solvents such as styrene, toluene dissolve anthracene,
The plastics such as polystyrene, the polyvinyl-toluene that the fluorophor such as talan (stilbenzene) carry out producing high-molecular and manufacture dodge
Bright body.
The plastic scintillant compared with crystalline inorganic scintillator, easy processing and forming into large area film shape or
Elongated shape etc., and due to light and with flexibility, therefore impact resistance is excellent, and low cost, it is readily available, therefore use
In various radiation detecting apparatus.Additionally, plastic scintillant is small due to material proportion, gamma-rays sensitivity is relatively low, therefore suitable
For the highly sensitive radiation detecting apparatus with β rays as measure object.
Here, the radiation detecting apparatus described in patent document 1 include：The slim scintillator of large area, its configuration is in inspection
The inner upper of device container is surveyed, the passage of scintillation light of amount corresponding with the radiological dose from external incident is produced；And it is multiple slim poly-
Body of light, the plurality of slim condensing body is abreast configured in the inside of detector container with the slim scintillator of large area, to big by this
The passage of scintillation light produced in the slim scintillator of area carries out optically focused.The radiation detecting apparatus include：It is attached at the slim sudden strain of a muscle of large area
Photomask in the detector outer lateral side of bright body；And multiple photo detectors, the plurality of photo detector is with its smooth surface direction
The mode of slim condensing body is configured on the focal point of multiple slim condensing bodies, and the light that will be received to be converted to electric signal defeated
Go out to counting circuit.By using this structure, the radiation detecting apparatus can improve the detection sensitivity of radioactive ray.
Prior art literature
Patent document
Patent document 1：Japanese Patent Laid-Open 8-248139 publications
The content of the invention
The technical problems to be solved by the invention
However, in conventional radiation detecting apparatus, employing and setting light detection sensitivity large area light higher
Element sets multiple photo detectors received to passage of scintillation light and improves the structure of light detection sensitivity, therefore apparatus structure
Complicated and maximization, and the sensitivity for being obtained is difficult to exceed the light detection sensitivity of photomultiplier.
On the other hand, light guiding is being carried out to passage of scintillation light so as to using the situation of the less single photo detector of light-receiving area
Under, in order to improve light detection sensitivity, photo detector is used as using photomultiplier.In this case, there is installation cost change
Problem high.
The present invention is completed in view of the foregoing, is measured its object is to provide a kind of radiation detecting apparatus, radiological agent
Amount processing method and radiation dose measurement processing routine, even if using the letter that light-receiving area is smaller, light detection sensitivity is relatively low
Easy photo detector can also improve light detection sensitivity, so as to improve radioactive ray detection sensitivity.
Technical teaching for solving the problem was
To solve the above problems, goal of the invention is realized, radiation detecting apparatus of the invention are characterised by, including：Put
Ray detection portion, the radioactive ray test section generates radiation detection signal according to the energy of incident radioactive ray；Accidental resonance
Portion, the accidental resonance portion makes the radiation detection signal that the radioactive ray test section is generated produce Stochastic Resonance Phenomenon to come to institute
Stating radiation detection signal carries out waveform recovery, and exports thus obtained waveform recovery signal；And operational part, the computing
Portion is based on the waveform recovery signal measurement radiological dose that the accidental resonance portion is generated.
Additionally, radiation detecting apparatus of the invention are characterised by, and in the present invention as stated above, the accidental resonance portion bag
Include：Noise adder, the noise adder makes the radiation detection signal and noise signal that the radioactive ray test section is generated
It is added to generate noise additive signal；Threshold process portion, the threshold process portion carries out threshold process, i.e. in the noise addition
The noise additive signal that portion is generated regulation threshold value more than in the case of, export high level pulse signal；And waveform
Recovery section, waveform recovery section output has carried out what is obtained after smoothing processing to the pulse signal that is exported from the threshold process portion
Waveform recovers signal.
Additionally, radiation detecting apparatus of the invention are characterised by, in the present invention as stated above, the accidental resonance portion is in parallel
Multiple accidental resonance basic portion are configured with, the plurality of accidental resonance basic portion includes：Noise adder, the noise adder makes institute
The radiation detection signal that radioactive ray test section generated is stated to be added to generate noise additive signal with noise signal；And threshold value
Processing unit, the threshold process portion carries out threshold process, i.e. the noise additive signal generated in the noise adder is specifying
Threshold value more than in the case of, export the pulse signal of high level, the radiation detecting apparatus also include：Pulse adder, should
The pulse additive signal that the output of pulse adder is obtained after being sued for peace to the pulse signal exported from each random vibration basic portion；And
Waveform recovery section, after waveform recovery section output has carried out smoothing processing to the pulse additive signal of pulse adder output
The waveform for obtaining recovers signal.
Additionally, radiation dose measurement processing method of the invention is characterised by, make the energy according to incident radioactive ray
The radiation detection signal measured and generate produces Stochastic Resonance Phenomenon to carry out waveform recovery to the radiation detection signal, and
Export thus obtained waveform and recover signal, signal measurement radiological dose is recovered based on the waveform.
Additionally, radiation dose measurement processing routine of the invention is characterised by, computing device is set to process as follows：Make root
The radiation detection signal generated according to the energy of incident radioactive ray produces Stochastic Resonance Phenomenon to examine the radioactive ray
Surveying signal carries out waveform recovery, and exports thus obtained waveform recovery signal, and signal measurement radiation is recovered based on the waveform
Dosage.
Invention effect
According to the present invention, by accidental resonance portion makes the radiation detection signal that radioactive ray test section is generated produce at random
Covibration carries out waveform recovery to the radiation detection signal, and exports thus obtained waveform and recover signal, therefore
Even if can also improve light detection sensitivity using the simple photo detector that light-receiving area is smaller and light detection sensitivity is relatively low, so that
Radioactive ray detection sensitivity can be improved.
Brief description of the drawings
Fig. 1 is the integrally-built schematic diagram of the radiation detecting apparatus for representing embodiments of the present invention 1.
Fig. 2 is the block diagram of the detailed construction for representing accidental resonance portion.
Fig. 3 is the figure for representing the radiation detection signal i.e. time domain waveform of input signal for being input to accidental resonance portion.
Fig. 4 is the figure of the time domain waveform for representing the noise additive signal that noise adder is exported.
Fig. 5 is the figure of the time domain waveform for representing the threshold process signal that comparator is exported.
Fig. 6 is the time domain waveform for representing the additive signal using adder to being obtained after the summation of all threshold process signals
Figure.
Fig. 7 is to represent that the waveform from the output of waveform recovery section recovers the figure of the signal i.e. time domain waveform of output signal.
Fig. 8 is the circuit diagram of the structure in the accidental resonance portion for representing embodiments of the present invention 2.
Fig. 9 is at the radiation dose measurement involved by the radiation dose measurement processing routine for representing embodiment of the present invention 3
Manage the flow chart of step.
Specific embodiment
Below, referring to the drawings to being illustrated for implementing mode of the invention.
(implementation method 1)
[overall structure]
Fig. 1 is the integrally-built schematic diagram of the radiation detecting apparatus for representing embodiments of the present invention 1.Such as Fig. 1 institutes
Show, radiation detecting apparatus 1 have radioactive ray test section 2 and signal processing part 3.Radioactive ray test section 2 has scintillator 4, light
Lead 5 and photo detector 6.Signal processing part 3 has accidental resonance portion 7 and operational part 8.
Scintillator 4 from after external incident, produces the passage of scintillation light corresponding with the energy of radioactive ray R in radioactive ray R, makes flicker
Light incides the light guide 5 supported to scintillator 4.Light guide 5 is tapered, and scintillator is configured with the larger end face of its area
4, and it is configured with photo detector 6 on the less other end of area.The passage of scintillation light for inciding light guide 5 reaches light through multiple reflections
The less photo detector 6 of area.Photo detector 6 according to the incident light quantity of passage of scintillation light export through after opto-electronic conversion by optical signal,
And the output signal is arrived the accidental resonance portion 7 of signal processing part 3 as the input signal Vin outputs to accidental resonance portion 7.Should
Input signal Vin is the radiation detection signal detected by radioactive ray test section 2.
Accidental resonance portion 7 can be processed to faint input that is in the past undetectable, being mixed in noise by accidental resonance
Signal Vin carries out highly sensitive waveform recovery.Accidental resonance refers to following this phenomenon：If to potentially having weak beat
The nonlinear system of (small-signal) applies a certain suitable noise, then before the beat (small-signal) hidden become on the contrary
Substantially, so as to be gone out with good sensitivity technique.Accidental resonance portion 7 produces the input signal Vin from the input of photo detector 6
Stochastic Resonance Phenomenon carries out waveform recovery to radiation detection signal, and generation waveform recovers signal, i.e. output signal Vout, and
By output signal Vout outputs to operational part 8.Here, generally, the radiation detection signal (input signal Vin) of radioactive ray R is
The signal of pulse type, output signal Vout is also pulse-like signal.Operational part 8 is output signal Vout based on pulse-like signal
Size and number measures the computing of radiological dose.In addition, being output to as the radiological dose of operation result not shown
Display part, communication unit etc..
[structure in accidental resonance portion]
Fig. 2 is the block diagram of the detailed construction for representing accidental resonance portion 7.As shown in Fig. 2 accidental resonance portion 7 have four with
Machine resonance basic portion 40a~40d, adder 30 and waveform recovery section 50.Four accidental resonance basic portion 40a~40d are in parallel
Connection, and input has input signal Vin respectively.
Each accidental resonance basic portion 40a~40d respectively have noise adder 10a~10d and threshold process portion 20a~
20d.Noise adder 10a~10d has noise adder 11a~11d and noise source 12a~12d respectively.In addition, threshold value
Processing unit 20a~20d has threshold voltage source 21a~21d and comparator 22a~22d respectively.
Each noise adder 11a~11d is by respectively from the noise signal Vn1~Vn4 difference of noise source 12a~12d outputs
Be added with the input signal Vin being input into, so as to as noise additive signal Va1~Va4 be respectively outputted to comparator 22a~
22d.In addition, noise signal Vn1~Vn4 is orthogonal signal.Additionally, noise signal Vn1~Vn4 is preferably white noise message
Number, but it is not limited to the noise signal of this, or other species.
Each comparator 22a~22d has been input into above-mentioned noise additive signal Va1~Va4 and from each threshold voltage source respectively
Threshold signal Vth1~the Vth4 of 21a~21d outputs.Each comparator 22a~22d is in the noise additive signal Va1 being input into respectively
~Va4 in the case of threshold signal Vth1~more than Vth4, exports the threshold process signal Vc1 of high level pulse signal respectively
~Vc4, in the case where noise additive signal Va1~Va4 is respectively lower than threshold signal Vth1~Vth4, exports low level pulse
The threshold process signal Vc1~Vc4 of signal.Threshold process signal Vc1~Vc4 is imported into adder 30.In addition, threshold value is believed
The value of number Vth1~Vth4 is set as the signal of the noise level included than input signal Vin and noise signal Vn1~Vn4
Level wants big value.
30 couples of four threshold process signal Vc1~Vc4 from each comparator 22a~22d inputs of adder sue for peace, and
As additive signal Vad outputs to waveform recovery section 50.The additive signal Vad that waveform recovery section 50 pairs is input into carries out smooth place
Reason, output carries out the output signal Vout after waveform recovery to original input signal Vin.
Here, each accidental resonance basic portion 40a~40d improves the S/N of input signal Vin, and generation can improve detection spirit
The Stochastic Resonance Phenomenon of sensitivity.Generally, the small-signal below the value of threshold signal Vth1~Vth4 is undetectable, if but
Using accidental resonance basic portion 40a~40d, then random resonance phenomenon can be utilized, even so that threshold signal Vth1~
Small-signal (input signal Vin) below the value of Vth4, the input signal Vin that will only can be also mixed in noise highlight into
Row output.
[signal waveform in accidental resonance portion]
Then, the treatment based on the signal waveform in accidental resonance portion 7 to accidental resonance portion 7 is illustrated.First, Fig. 3
It is the figure of the time domain waveform for representing input signal Vin.As shown in Figure 3, although noise has been mixed into input signal Vin, but in the phase
Between there is the pulse type radiation detection signal P that photo detector 6 is detected in ta.Due to pulse type radiation detection signal P
It is the small-signal being mixed in noise, therefore cannot be detected in the past.
Fig. 4 is the figure of the time domain waveform for representing the noise additive signal Va1 that noise adder 11a is exported.Such as Fig. 4 institutes
Show, noise additive signal Va1 is obtained after input signal Vin is added with noise signal Vn1.By applying the noise signal
Vn1 so that the noise additive signal Va1 in period ta reaches more than threshold signal Vth1.
Fig. 5 is the figure of the time domain waveform for representing the threshold process signal Vc1 that comparator 22a is exported.As shown in figure 5,
In period ta, due to Stochastic Resonance Phenomenon so that the pulse-like signal P1 corresponding with pulse type radiation detection signal P is defeated
Go out.
Fig. 6 is to represent the additive signal obtained after be added for all threshold process signal Vc1~Vc4 by adder 30
The figure of the time domain waveform of Vad.According to additive signal Vad, then in period ta outputs close to pulse type radiation detection signal P
Waveform, i.e. stepped signal P2.
Fig. 7 is the figure of the time domain waveform for representing the output signal Vout from the output of waveform recovery section 50.Waveform recovery section 50
Specifically frequency filter circuit, is the low pass filter for removing stair-stepping high fdrequency component.In addition, low pass filter
Cut-off frequency need to be set as with the signal frequency calculated according to the pulse width of pulse type radiation detection signal P compared with enough
Enough big values.In Fig. 7, the waveform occurred in period ta recovers signal P3 more puts down compared with the additive signal Vad shown in Fig. 6
It is sliding, and recovered the waveform roughly the same with the signal waveform of pulse type radiation detection signal P.
In addition, in Stochastic Resonance Phenomenon, because noise signal Vn1~Vn4 is orthogonal signal, therefore can pass through
It is extensive closer to the waveform of pulse type radiation detection signal P to carry out to increase the number in parallel of accidental resonance basic portion 40a~40d
It is multiple.In addition, the number in parallel of accidental resonance basic portion 40a~40d is set to 4 in Fig. 2, but the numeral illustrate only an example
Son.
In present embodiment 1, Stochastic Resonance Phenomenon is produced using the accidental resonance portion 7 of easy structure, can be from input signal
Unwanted noise is removed in Vin, so as to greatly improve the S/N ratios of pulse type radiation detection signal P, therefore can be with simple
Structure improve radioactive ray detection sensitivity.
Additionally, in present embodiment 1, even if not using the expensive photo detector such as photomultiplier for example, can also utilize
The low cost semiconductor light-receiving device such as avalanche photodide improves radioactive ray detection sensitivity.
Additionally, above-mentioned signal processing part 3 can be simulated signal transacting, it is also possible to A/D is carried out to input signal Vin and is turned
Bringing carries out Digital Signal Processing.In the case where Digital Signal Processing is carried out, integrated signal processing unit is carried out preferably by FPGA
3。
(implementation method 2)
Employed structure four accidental resonance basic portion 40a~40d in parallel in above-mentioned implementation method 1, but also can be only
Accidental resonance portion 7 is constituted using an accidental resonance basic portion 40a.
Fig. 8 is the circuit diagram of the structure in the accidental resonance portion for representing embodiments of the present invention 2.As shown in figure 8, random common
Accidental resonance basic portion 40a, Yi Jibo that implementation method 1 of the portion 17 with configuration in accidental resonance portion 7 of shaking is used
Shape recovery section 60.Ripple is arrived in threshold process signal Vc1 outputs of the accidental resonance basic portion 40a using input signal Vin shown in Fig. 5
Shape recovery section 60.Pair arteries and veins corresponding with pulse type radiation detection signal P in the sampling period of regulation of waveform recovery section 60
Rush shape signal P1 to move averagely, pulse type radiation detection signal P is finally recovered from pulse-like signal P1 so as to obtain
To and generate waveform and recover signal P3.Then, waveform recovery signal P3 is come defeated by waveform recovery section 60 as output signal Vout
Go out.In addition, rolling average is a kind of low-pass filtering treatment.
(implementation method 3)
Signal processing part 3 in above-mentioned implementation method 1,2 employs the hardware configurations such as electronic loop, but present embodiment 3
In, carry out the treatment corresponding with signal processing part 3 by using the Digital Signal Processing of software.Additionally, the data signal
Treatment is performed by radiation dose measurement processing routine.In this case, being come directly to input using high-speed a/d conversion element etc.
Signal Vin carries out A/D conversions, and is input in the arithmetic unit comprising CPU and memory, and CPU is using being stored in memory
In radiation dose measurement program perform a series of radiation dose measurement treatment, i.e. noise addition process, threshold process, add
Method treatment, waveform recovery treatment, radiation dose measurement treatment etc..Additionally, it is preferred that being filled by the computing comprising CPU and memory
Put and radiation dose measurement processing routine is configured to signal processing part 3.Additionally, CPU can also only be performed at random using program
The treatment of resonance part 7.
Fig. 9 is at the radiation dose measurement involved by the radiation dose measurement processing routine for representing embodiment of the present invention 3
Manage the flow chart of step.As shown in figure 9, first, the CPU pairs for the treatment of corresponding with accidental resonance basic portion 40a~40d is carried out simultaneously
Row treatment (step S101a, S102a, S101b, S102b, S101c, S102c, S101d, S102d).That is, CPU is to following first
~fourth process carries out parallel processing：Carried out and threshold after the addition process (step S101a) corresponding with noise adder 10a
First treatment of value processing unit 20a corresponding threshold process (step S102a)；Add in corresponding with noise adder 10b
The second processing of the threshold process (step S102b) corresponding with threshold process portion 20b is carried out after method treatment (step S101b)；
The threshold value corresponding with threshold process portion 20c is carried out after the addition process (step S101c) corresponding with noise adder 10c
3rd treatment for the treatment of (step S102c)；And after the addition process (step S101d) corresponding with noise adder 10d
Carry out the fourth process of the threshold process (step S102d) corresponding with threshold process portion 20d.
Afterwards, CPU carries out the addition process (step S103) corresponding with adder 30.Afterwards, CPU carries out extensive with waveform
Corresponding waveform recovery treatment (step S104) in multiple portion 50.In addition, CPU also carries out the radiological dose corresponding with operational part 8
Measurement processing (step S105).Afterwards, CPU is repeated the above in the sampling period that each specifies.In addition, believing input
Each sampled data of number Vin carries out whole above-mentioned treatment.Here, the waveform recovery treatment of step S104, step S105
Using data be saved in memory past time series to be processed by the measurement processing of radiological dose.
In present embodiment 3, the treatment of signal processing part 3, therefore energy are carried out using radiation dose measurement processing routine
Various radiation detecting apparatus are flexibly designed and design alteration, and can significantly be cut down circuit components.
In addition, in above-mentioned implementation method 1~3, radioactive ray test section 2 uses scintillator 4, is received by photo detector 6 and come from
The passage of scintillation light of the scintillator 4, so as to detect pulse type radiation detection signal P.But it is not limited to this, it is also possible to do not use sudden strain of a muscle
Bright body 4, and pulse type radiation detection signal P is detected using the radiation detection device of direct detection radioactive ray.Namely
Say, as long as radioactive ray test section 2 can generate output signal (the pulse type radioactive ray corresponding with the energy of incident radioactive ray R
Detection signal P).
Label declaration
1 radiation detecting apparatus
2 radioactive ray test sections
3 signal processing parts
4 scintillators
5 light guides
6 photo detectors
7th, 17 accidental resonance portion
8 operational parts
10a~10d noise adders
11a~11d noise adders
12a~12d noise sources
20a~20d threshold process portion
21a~21d threshold voltage sources
22a~22d comparators
30 adders
40a~40d accidental resonance basic portion
50th, 60 waveform recovery section
P pulse type radiation detection signals
P1 pulse-like signals
The stepped signals of P2
P3 waveforms recover signal
R radioactive ray
During ta
Va1~Va4 noise additive signals
Vad additive signals
Vc1~Vc4 threshold process signals
Vin input signals
Vn1~Vn4 noise signals
Vout output signals
Vth1~Vth4 threshold signals
Claims (16)
1. a kind of radiation detecting apparatus, radiological dose is calculated according to from the radioactive ray of external incident, and by calculate this put
Penetrate dosage output to display part or communication unit, it is characterised in that including：
Scintillator, the scintillator produces the passage of scintillation light corresponding with the energy of the radioactive ray from external incident；
Photo detector, the photo detector exports the input letter by being obtained after opto-electronic conversion according to the incident light quantity of the passage of scintillation light
Number；
Accidental resonance portion, the accidental resonance portion makes the input signal that the photo detector is exported produce Stochastic Resonance Phenomenon to enter
Traveling wave shape is recovered, and exports thus obtained waveform recovery signal；And
Operational part, the operational part measures treatment, i.e. recover signal measurement based on the waveform that the accidental resonance portion is generated
Radiological dose,
The accidental resonance portion includes：
Noise adder, the noise adder enters Row noise addition process, i.e. make the input signal with noise signal phase Calais
Generation noise additive signal；
Threshold process portion, the threshold process portion carries out threshold process, i.e. in the noise addition letter that the noise adder is generated
Number regulation threshold value more than in the case of, export high level pulse signal；And
Waveform recovery section, the waveform recovery section carries out waveform recovery treatment, i.e. export the arteries and veins to being exported from the threshold process portion
The waveform that rushing signal obtained after smoothing processing recovers signal.
2. radiation detecting apparatus as claimed in claim 1, it is characterised in that
Each of the sampled data of the time series of the noise adder, the threshold process portion to the input signal is adopted
Sample data enter Row noise addition process and threshold process respectively.
3. radiation detecting apparatus as claimed in claim 1, it is characterised in that
The sampled data of the past time series of the input signal is stored in storage by the waveform recovery section, the operational part
In device, treatment and measurement processing are recovered to carry out waveform respectively.
4. radiation detecting apparatus as claimed in claim 2, it is characterised in that
The sampled data of the past time series of the input signal is stored in storage by the waveform recovery section, the operational part
In device, treatment and measurement processing are recovered to carry out waveform respectively.
5. radiation detecting apparatus as described in any one of Claims 1-4, it is characterised in that
The photo detector is semiconductor light-receiving device.
6. a kind of radiation detecting apparatus, radiological dose is calculated according to from the radioactive ray of external incident, and by calculate this put
Penetrate dosage output to display part or communication unit, it is characterised in that including：
Scintillator, the scintillator produces the passage of scintillation light corresponding with the energy of the radioactive ray from external incident；
Photo detector, the photo detector have passed through the input obtained after opto-electronic conversion according to the output of the incident light quantity of the passage of scintillation light
Signal；
Accidental resonance portion, the accidental resonance portion makes the input signal that the photo detector is exported produce Stochastic Resonance Phenomenon to enter
Traveling wave shape is recovered, and exports thus obtained waveform recovery signal；And
Operational part, the operational part measures treatment, i.e. recover signal measurement based on the waveform that the accidental resonance portion is generated
Radiological dose,
The accidental resonance portion includes：
Multiple accidental resonance basic portion, the plurality of accidental resonance basic portion parallel configuration, wherein, the accidental resonance basic portion bag
Include：Noise adder, the noise adder makes the input signal be added with noise signal to generate noise additive signal；And
Threshold process portion, the threshold process portion carries out threshold process, i.e. the noise additive signal generated in the noise adder exists
In the case of more than the threshold value of regulation, the pulse signal of high level is exported；
Pulse adder, the pulse adder by during the synchronization of the pulse signal exported from each accidental resonance basic portion each other
It is added, and exports thus obtained pulse additive signal；And
Waveform recovery section, the waveform recovery section carries out waveform recovery treatment, i.e. pulse of the output to pulse adder output
The waveform that additive signal obtained after smoothing processing recovers signal.
7. radiation detecting apparatus as claimed in claim 6, it is characterised in that
Each of the sampled data of the time series of the noise adder, the threshold process portion to the input signal is adopted
Sample data enter Row noise addition process and threshold process respectively.
8. radiation detecting apparatus as claimed in claim 6, it is characterised in that
The sampled data of the past time series of the input signal is stored in storage by the waveform recovery section, the operational part
In device, treatment and measurement processing are recovered to carry out waveform respectively.
9. radiation detecting apparatus as claimed in claim 7, it is characterised in that
The sampled data of the past time series of the input signal is stored in storage by the waveform recovery section, the operational part
In device, treatment and measurement processing are recovered to carry out waveform respectively.
10. radiation detecting apparatus as described in any one of claim 6 to 9, it is characterised in that
The photo detector is semiconductor light-receiving device.
A kind of 11. radiation dose measurement processing methods, it is characterised in that including：
The step of producing the passage of scintillation light corresponding with the energy of the radioactive ray from external incident；
The step of output carries out the input signal obtained after opto-electronic conversion according to the input light quantity of the passage of scintillation light；
The step of entering Row noise addition process, i.e. generation makes the input signal that the noise addition for obtaining is added with noise signal
Signal；
The step of carrying out threshold process, i.e. in the case where the noise additive signal is more than the threshold value of regulation, output electricity high
Flat pulse signal；
Carry out waveform and recover the step of processing, i.e. the waveform that output is obtained after being smoothed to the pulse signal recovers
Signal；
The step of measuring treatment, i.e. signal measurement radiological dose is recovered based on the waveform；And
The step of radiological dose output that will be measured is to display part or communication unit.
12. radiation dose measurement processing methods as claimed in claim 11, it is characterised in that
Each sampled data to the sampled data of the time series of the input signal carries out the noise addition process, institute
State threshold process.
The 13. radiation dose measurement processing method as described in claim 11 or 12, it is characterised in that
The sampled data of the past time series of the input signal is preserved in memory to carry out at the waveform recovery
Reason and the measurement processing.
A kind of 14. radiation dose measurement processing methods, it is characterised in that including：
The step of producing the passage of scintillation light corresponding with the energy of the radioactive ray from external incident；
The step of incident light quantity output according to the passage of scintillation light have passed through the input signal obtained after opto-electronic conversion；
The step of entering Row noise addition process, i.e. the input signal is divided into multiple, makes each input signal after segmentation and makes an uproar
Message phase adduction generates thus obtained noise additive signal；
The step of carrying out threshold process, i.e. in the case where the noise additive signal is more than the threshold value of regulation, output electricity high
Flat pulse signal；
By the step of phase adduction exports thus obtained pulse additive signal each other during the synchronization of each pulse signal；
Carry out waveform and recover the step of processing, i.e. the ripple that output to the pulse additive signal obtained after smoothing processing
Shape recovers signal；
The step of measuring treatment, i.e. signal measurement radiological dose is recovered based on the waveform；And
The step of radiological dose output that will be measured is to display part or communication unit.
15. radiation dose measurement processing methods as claimed in claim 14, it is characterised in that
Each sampled data to the sampled data of the time series of the input signal carries out the noise addition process, institute
State threshold process.
The 16. radiation dose measurement processing method as described in claims 14 or 15, it is characterised in that
The sampled data of the past time series of the input signal is preserved in memory to carry out at the waveform recovery
Reason and the measurement processing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-037222 | 2014-02-27 | ||
| JP2014037222 | 2014-02-27 | ||
| PCT/JP2014/070513 WO2015129069A1 (en) | 2014-02-27 | 2014-08-04 | Radiation detection device, radiation dosimetry processing method, and radiation dosimetry processing program |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105492929A CN105492929A (en) | 2016-04-13 |
| CN105492929B true CN105492929B (en) | 2017-06-13 |
Family
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| JP2010078338A (en) * | 2008-09-24 | 2010-04-08 | Toshiba Corp | X-ray detector |
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| Application of Stochastic Resonance for Imaging Enhancement of Computed Tomography in Hepatocellular Carcinoma;Jia-Rong Yeh 等;《IEEE International Conference on Bioinformatics and Biomedicine Workshops》;20111231;第945-947页 * |
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