CN108008440A - low background α, β measuring device - Google Patents
low background α, β measuring device Download PDFInfo
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- CN108008440A CN108008440A CN201810101819.5A CN201810101819A CN108008440A CN 108008440 A CN108008440 A CN 108008440A CN 201810101819 A CN201810101819 A CN 201810101819A CN 108008440 A CN108008440 A CN 108008440A
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- 238000005259 measurement Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 claims abstract description 21
- 230000005250 beta ray Effects 0.000 claims abstract description 12
- 230000003321 amplification Effects 0.000 claims description 40
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 40
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 23
- 229910052700 potassium Inorganic materials 0.000 claims description 23
- 239000011591 potassium Substances 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000523 sample Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/208—Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section
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- Life Sciences & Earth Sciences (AREA)
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- High Energy & Nuclear Physics (AREA)
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- Spectroscopy & Molecular Physics (AREA)
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Abstract
The present invention provides a kind of Low background α, β measuring device, including：Main detector, anticoincidence detector and control circuit, main detector and anticoincidence detector are connected with control circuit respectively；Main detector is used to gather main detectable signal, and main detectable signal is inputted to control circuit, and main detectable signal is α, β ray that sample produces, and/or, the detectable signal of radioactivity background generation；Anticoincidence detector is used to gather anticoincidence signal, and anticoincidence signal is inputted to control circuit, and anticoincidence signal is the detectable signal of radioactivity background generation；Control circuit is used for main detectable signal and anticoincidence signal determines whether be subject to radioactivity background to disturb during α, β activity measurement is carried out to sample, and when determining to be not affected by interference, counts the measurement result of α, β activity measurement.The present invention alleviates the technical problem that existing measuring device is easily subject to radioactivity background to disturb when carrying out α, β activity measurement.
Description
Technical field
The present invention relates to the technical field of radiation detection, more particularly, to a kind of Low background α, β measuring device.
Background technology
Total α, the total β that Low background α, β measuring device is widely used in the several samples such as water sample, biological sample, environment sample live
Degree measurement, is environmental monitoring station, physical health care center, the necessary equipment of Running-water Company.
Because the specific radioactivity of institute's sample is relatively low, measuring environment need to keep extremely low environmental exact details, except installation vitriol chamber
Shielding is outer also to need installation anticoincidence detection device to shield the background interference of high-energy environment background radiation generation.Because Low background measures
To the high request of Low background, anticoincidence detection can whole accurate shielding environment background radiations interference, and sample measurement period
It is generally several or more than ten hour, it is necessary to which anticoincidence detector can continually and steadily work.
The content of the invention
In view of this, it is an object of the invention to provide a kind of Low background α, β measuring device, the present invention alleviates existing
Measuring device is easily subject to the technical problem that radioactivity background disturbs when carrying out α, β activity measurement.
To include in a first aspect, an embodiment of the present invention provides a kind of Low background α, β measuring device：Main detector, anticoincidence
Detector and control circuit, wherein, the main detector and the anticoincidence detector are connected with the control circuit respectively；
The main detector is used to gather main detectable signal, and the main detectable signal is inputted to the control circuit, wherein, it is described
Main detectable signal is α, β ray produced based on sample, and/or, the detectable signal of radioactivity background generation；The anticoincidence
Detector is used to gather anticoincidence signal, and the anticoincidence signal is inputted to the control circuit, wherein, the anticoincidence
Signal is the detectable signal based on radioactivity background generation；The control circuit is used for the main detectable signal and the anti-symbol
Close signal and determine whether be subject to radioactivity background to disturb during α, β activity measurement is carried out to sample, and determining
When going out to be not affected by interference, the measurement result of α, β activity measurement is counted.
Further, the detector and control circuit quantity are multiple, wherein, the main detector respectively with it is each
The control circuit is connected, for sending the main detectable signal to each controller；The anticoincidence detector with
Each control circuit is connected, for sending the anticoincidence signal to each controller.
Further, the control circuit includes：Discriminator circuit and logical operation circuit, wherein, the discriminator circuit bag
The first discriminator circuit and the second discriminator circuit are included, first discriminator circuit is connected with the main detector, for obtaining
State the main detectable signal of main detector transmission；Second discriminator circuit is connected with the anticoincidence detector, is used for
Obtain the anticoincidence signal of the anticoincidence detector；The logical operation circuit respectively with first discriminator circuit and
Second discriminator circuit is connected, for the examination result based on first discriminator circuit and second discriminator circuit
Screen result and determine whether be subject to radioactivity background to disturb during α, β activity measurement is carried out to sample.
Further, first discriminator circuit includes：First screens sub-circuit, and second, which screens sub-circuit and the 3rd, screens
Sub-circuit；Wherein, it is described first screen sub-circuit, it is described second screen sub-circuit and it is described 3rd screen sub-circuit respectively with institute
State main detector to be connected, the main detectable signal sent for obtaining the main detector respectively.
Further, the logical operation circuit includes：First and door, second and door, the 3rd with door and NAND gate, its
In, described first is connected with the input terminal of door with the output terminal of the described first examination sub-circuit, described second with the input of door
The output terminal with described two examination sub-circuits is held to be connected, the described 3rd screens sub-circuit with the input terminal of door and the described 3rd
Output terminal is connected, the input terminal output with the described 3rd examination sub-circuit and two discriminator circuit respectively of the NAND gate
End is connected, and the output terminal of the NAND gate is connected with the described 3rd with door input terminal respectively, the 3rd with gate output terminal respectively with
First is connected with door and described second with the input terminal of door；Described first and door, described second and door, the described 3rd with door and
The output terminal of the NAND gate is connected with microcontroller respectively.
Further, the control circuit further includes：First operational amplification circuit and the second operational amplification circuit, wherein,
First operational amplification circuit is arranged between the main detector and first discriminator circuit, for obtaining the main spy
The main detectable signal of device output is surveyed, and is inputted after being amplified to the main detectable signal to first discriminator circuit
In；Second operational amplification circuit is arranged between the anticoincidence detector and second discriminator circuit, for obtaining
The anticoincidence signal of the anticoincidence detector output, and inputted after being amplified to the anticoincidence signal to described
In second discriminator circuit.
Further, the main detector includes：Low background α, β twin scintillator, the first low potassium photomultiplier and first
Preposition amplification bleeder circuit, wherein, Low background α, β twin scintillator potassium photomultiplier low with described first is connected, institute
The input terminal that the first low potassium photomultiplier is stated with the described first preposition amplification bleeder circuit is connected；Described Low background α, β are double
Scintillator is used for α, β ray for absorbing sample generation, and/or, radioactivity background, and α, β ray is based on, and/or, institute
State radioactivity background and produce fluorescence；The first low potassium photomultiplier is used to the fluorescence being converted to electric signal；It is described
First preposition amplification bleeder circuit is used to be amplified the electric signal, and the main detectable signal is obtained after amplification.
Further, the anticoincidence detector includes：Before anticoincidence scintillator, the second low potassium photomultiplier, second
Big bleeder circuit is put, wherein, the input terminal of the second low potassium photomultiplier and the described second preposition amplification bleeder circuit
It is connected, the output terminal of the second preposition amplification bleeder circuit is connected with the anticoincidence scintillator, and the anticoincidence is dodged
Bright body is used to absorb radioactivity background, and produces fluorescence based on the radioactivity background；The second low potassium photomultiplier transit
Pipe is used to the fluorescence being converted to electric signal；The second preposition amplification bleeder circuit is used to put the electric signal
Greatly, the anticoincidence signal is obtained after amplification.
Further, described device further includes：Host computer, the host computer are connected with microcontroller, described for obtaining
The data of microcontroller transmission, and the data of microcontroller transmission are stored.
Include in Low background α, β measuring device provided by the invention：Main detector, anticoincidence detector and control circuit,
Wherein, main detector and anticoincidence detector are connected with control circuit respectively；Main detector is used to gather main detectable signal, and
Main detectable signal is inputted to control circuit, wherein, main detectable signal is α, β ray produced based on sample, and/or, environment
The detectable signal of background radiation generation；Anticoincidence detector is used to gather anticoincidence signal, and anticoincidence signal is inputted to control
Circuit processed, wherein, anticoincidence signal is the detectable signal based on radioactivity background generation；Control circuit is used for main detectable signal
Determine whether be subject to radioactivity background to disturb during α, β activity measurement is carried out to sample with anticoincidence signal, and
When determining to be not affected by interference, the measurement result of α, β activity measurement is counted.It is provided by the present invention by foregoing description
Low background α, β measuring device anticoincidence device alleviate existing measuring device and be easily subject to when carrying out α, β activity measurement
The technical problem of radioactivity background interference.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of schematic diagram of Low background α, β measuring device provided in an embodiment of the present invention；
Fig. 2 is the arrangement of a kind of multi-channel control circuit provided in an embodiment of the present invention and anticoincidence detector and main detector
Figure；
Fig. 3 is the schematic diagram of another optional Low background α, β measuring device provided in an embodiment of the present invention；
Fig. 4 is that the embodiment of the present invention provides a kind of schematic diagram of main detector；
Fig. 5 is a kind of schematic diagram of anticoincidence detector provided in an embodiment of the present invention.
Icon：
10- main detectors；20- anticoincidence detectors；30- control circuits；301- discriminator circuits；A301- first screens electricity
Road；The second discriminator circuits of B301-；A3011- first screens sub-circuit；A3012- second screens sub-circuit；A3013 the 3rd is screened
Sub-circuit；302- logical operation circuits；3021- first and door；3022- second and door；3023- NAND gates；3024- the 3rd with
Door；303- microcontrollers；40- host computers；101- Low background α, β twin scintillators；The low potassium photomultipliers of 102- first；103- first
Preposition amplification bleeder circuit；201- anticoincidence scintillators；The low potassium photomultipliers of 202- second；The preposition amplification partial pressures of 203- second
Circuit；The first operational amplification circuits of 304-；The second operational amplification circuits of 305-.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, belong to the scope of protection of the invention.
For ease of understanding the present embodiment, a kind of Low background α, β disclosed in the embodiment of the present invention are measured first
Device describes in detail.
Embodiment one：
According to embodiments of the present invention, there is provided a kind of embodiment of Low background α, β measuring device.
Fig. 1 is according to a kind of schematic diagram of Low background α, β measuring device of inventive embodiments, as shown in Figure 1, the circuit diagram
Including：Main detector 10, anticoincidence detector 20 and control circuit 30, wherein, the main detector 10 and the anticoincidence are visited
Device 20 is surveyed to be connected with the control circuit phase 30 respectively；
The main detector 10 is used to gather main detectable signal, and the main detectable signal is inputted to the control circuit
30, wherein, the main detectable signal is α, β ray produced based on sample, and/or, the detection letter of radioactivity background generation
Number；
The anticoincidence detector 20 is used to gather anticoincidence signal, and the anticoincidence signal is inputted to the control
Circuit 30, wherein, the anticoincidence signal is the detectable signal based on radioactivity background generation；The control circuit 30 is used for
The main detectable signal and the anticoincidence signal determine whether be subject to environment during α, β activity measurement is carried out to sample
The interference of background radiation, and when determining to be not affected by interference, count the measurement result of α, β activity measurement.
In Low background α, β measuring device anticoincidence device provided by the invention, including：Main detector, anticoincidence detector
And control circuit, wherein, main detector and anticoincidence detector are connected with control circuit respectively；Main detector is used to gather master
Detectable signal, and main detectable signal is inputted to control circuit, wherein, main detectable signal is α, β ray produced based on sample,
And/or the detectable signal of radioactivity background generation；Anticoincidence detector is used to gather anticoincidence signal, and anticoincidence is believed
Number input to control circuit, wherein, anticoincidence signal be based on radioactivity background generation detectable signal；Control circuit is used for
Main detectable signal and anticoincidence signal determine whether be subject to radioactivity background during α, β activity measurement is carried out to sample
Interference, and when determining to be not affected by interference, count the measurement result of α, β activity measurement.Pass through foregoing description, this hair
Bright provided Low background α, β measuring device anticoincidence device alleviates existing measuring device when carrying out α, β activity measurement
The technical problem for being easily subject to radioactivity background to disturb.
In an optional embodiment, as shown in Fig. 2, 30 quantity of the control circuit is multiple, wherein, it is described
Main detector 10 is connected with each control circuit 30 respectively, believes for sending the main detection to each controller
Number；The anticoincidence detector 20 is connected with each control circuit, described anti-for being sent to each controller
Meet signal.
As shown in figure 3, the control circuit 30 includes：Discriminator circuit 301 and logical operation circuit 302, wherein, the Zhen
Other circuit 301 includes the first discriminator circuit A301 and the second discriminator circuit B301,
The first discriminator circuit A301 is connected with the main detector 10, is sent for obtaining the main detector 10
The main detectable signal；
The second discriminator circuit B301 is connected with the anticoincidence detector 20, for obtaining the anticoincidence detection
The anticoincidence signal of device 20；
The logical operation circuit 302 respectively with the first discriminator circuit A301 and the second discriminator circuit B301 phases
Connection, the examination result for the examination result based on first discriminator circuit 301 and second discriminator circuit 302 determine
Whether it is subject to radioactivity background to disturb during α, β activity measurement is carried out to sample.
Specifically, as shown in figure 3, the first discriminator circuit A301 includes：First screens sub-circuit A3011, and second discriminates
Small pin for the case circuit A3012 and the 3rd screens sub-circuit A3013, wherein, described first screens sub-circuit A3011, and described two screen son
Circuit A3012 and the 3rd examination sub-circuit A3013 are connected with the main detector 10 respectively, described for obtaining respectively
The main detectable signal that main detector 10 is sent.
As shown in figure 3, the logical operation circuit 302 includes：First with door 3021, second with door 3022, NAND gate
3023 and the 3rd with door 3024, wherein, described first is defeated with the input terminal of door 3021 and the described first examination sub-circuit A3011
Outlet is connected, and described second is connected with the input terminal of door 3022 with the output terminal of described two examination sub-circuit A3012, described
3rd is connected with the input terminal of door 3024 with the output terminal of the described 3rd examination sub-circuit A3013, the NAND gate 3023
Output terminal of the input terminal respectively with the described 3rd examination sub-circuit A3013 and the second discriminator circuit B301 is connected, described
The output terminal of NAND gate 3023 is connected with the described 3rd with the input terminal of door 3024, the described 3rd with the output terminal point of door 3024
It is not connected with described first with door 3021 and described second with the input terminal of door 3022；Described first with door 3021, described the
Two with door 3022, the described 3rd is connected with microcontroller 303 respectively with door 3024 and the output terminal of the NAND gate 3023.
As shown in figure 3, described device further includes：Host computer 40, the host computer 40 are connected with microcontroller 303, are used for
The data that the microcontroller 303 transmits are obtained, and the data of the microcontroller 303 transmission are stored.
As shown in figure 3, the control circuit 30 further includes：First operational amplification circuit 304 and the second operational amplification circuit
305, wherein,
First operational amplification circuit 304 be arranged on the main detector 10 and the first discriminator circuit A301 it
Between, the main detectable signal that is exported for obtaining the main detector 10, and after being amplified to the main detectable signal
Input is into the first discriminator circuit A301；
Second operational amplification circuit sets 305 and puts in the anticoincidence detector 20 and the second discriminator circuit B301
Between, for obtaining the anticoincidence signal of the output of anticoincidence detector 20, and the anticoincidence signal is put
Input is into the second discriminator circuit B301 after big.
In another optional embodiment, as shown in figure 4, the main detector 10 includes：The double flickers of Low background α, β
Body 101, the first low preposition amplification bleeder circuit 103 of potassium photomultiplier 102 and first, wherein, the double flickers of described Low background α, β
The potassium photomultiplier 102 low with described first of body 101 is connected, before the first low potassium photomultiplier 102 and described first
The input terminal for putting big bleeder circuit 103 is connected.
Low background α, β twin scintillator 101 is used for α, β ray for absorbing sample generation, and/or, radioactivity background,
And α, β ray is based on, and/or, the radioactivity background produces fluorescence；The first low potassium photomultiplier 102 is used
In the fluorescence is converted to electric signal；The first preposition amplification bleeder circuit 103 is used to be amplified the electric signal,
The main detectable signal is obtained after amplification.
In another optional embodiment, as shown in figure 5, the anticoincidence detector 20 includes：Anticoincidence flickers
Body 201, the second low potassium photomultiplier 202, the second preposition amplification bleeder circuit 203, wherein, the second low potassium photomultiplier transit
Pipe 202 is connected with the input terminal of the described second preposition amplification bleeder circuit 203, the second preposition amplification bleeder circuit 202
Output terminal be connected with the anticoincidence scintillator 201,
The anticoincidence scintillator 201 is used to absorb the radioactivity background in sample, and is based on the environmental exact details spoke
Penetrate generation fluorescence；The second low potassium photomultiplier 202 is used to the fluorescence being converted to electric signal；Put before described second
Big bleeder circuit 203 is used to be amplified the electric signal, and the anticoincidence signal is obtained after amplification.
Next combine Fig. 3 the course of work of Low background α, β measuring device anticoincidence device is described in detail and
Supplement：
First, Low background α, β twin scintillator of main detector are used to absorb particle containing α or β particles in sample, can produce
Fluorescence, at this time photomultiplier be used to be converted into the fluorescence (namely optical signal) electric signal, and by electric signal transmission to first
Make enhanced processing in operational amplifier.Target electric signal is obtained after amplification.
Then, target electric signal is transmitted separately in three discriminator circuits, each discriminator circuit has its threshold value (i.e.,
Threshold value one, threshold value two and threshold value three).The operation principle of discriminator circuit is：When target electric signal is (that is, the main detection letter in Fig. 2
Number) impulse amplitude when being less than corresponding threshold value, which corresponds to without output when the impulse amplitude of target electric signal is more than
Threshold value when, which has output.
In this application, the operation principle of the anticoincidence scintillator in anticoincidence detector and Low background α, β twin scintillator
It is identical, all it is that fluorescence is produced after radioactivity background is absorbed to.At this time, the photomultiplier in anticoincidence detector can incite somebody to action
The fluorescence that anticoincidence scintillator produces is converted to electric signal, and the electric signal is amplified, and obtains anticoincidence signal.At this time,
Anticoincidence signal will be inputted into anticoincidence discriminator circuit and handled, wherein, the work of anticoincidence discriminator circuit and foregoing circuit
It is identical to make principle, i.e. if the impulse amplitude of anticoincidence signal is less than the threshold value of anticoincidence discriminator circuit, electricity is screened in anticoincidence
Road is without output, if the impulse amplitude of anticoincidence signal is more than the threshold value of anticoincidence discriminator circuit, anticoincidence discriminator circuit has
Output.
Wherein, the principle of anticoincidence detector is to meet the pulse of time using coincident circuit to eliminate.That is, work as
When the 3rd examination sub-circuit corresponding to threshold value three has output (for example, 1), when the second discriminator circuit also has output (for example, 1),
After 3rd screens sub-circuit and anticoincidence discriminator circuit (that is, the second discriminator circuit) progress and non-process, output is exactly 0.Should
Output result (that is, 0) and the output result (for example, 1) of the 3rd examination sub-circuit are asked with after, and output result is 0.At this time, even if
First screens sub-circuit (discriminator circuit corresponding to threshold value one) or the second examination sub-circuit (examination electricity corresponding to threshold value two
Road) there is output (for example, 1), then and the first examination sub-circuit and the 3rd result (that is, 0) exported with door are asked and handle it
Afterwards, and without output (that is, 0)；Second examination sub-circuit is asked and handled with the 3rd and the output result result (that is, 0) of door
Afterwards, and without output (that is, 0), the 3rd examination sub-circuit and the 3rd result (that is, 0) exported with door asked and handle it
Afterwards, still without output (that is, 0).
When the 3rd examination sub-circuit corresponding to threshold value three has output (for example, 1), the second discriminator circuit also has output
When (for example, 0), the 3rd, which screens sub-circuit and the second discriminator circuit, carries out and after non-process, output is exactly 1, is somebody's turn to do and non-result
Do not asked with after with the 3rd Zhen sub-circuit, output result is 1.At this time, if the first examination sub-circuit has output (for example, 1), then
It is exactly 1 that first examination sub-circuit and the 3rd result (that is, 1) exported with door, which ask with result afterwards, first is screened at this time
Sub-circuit has output.If the second discriminator circuit has output (for example, 1), then second screens sub-circuit and the 3rd exports with door
Result (that is, 1) ask with result afterwards be exactly 1, the second examination sub-circuit has output at this time.Similarly, if the 3rd
Screen sub-circuit and the 3rd result (i.e. 1) exported with door ask and result afterwards is 1, at this time, the 3rd screens sub-circuit
There is output.
By aforesaid operations, effectively radioactivity background can be eliminated, so that activity measurement is more accurate
Really.
In embodiment provided by the invention, radioactivity background is eliminated by anticoincidence, so that activity measurement is more
It is accurate to add, and reduces and the higher technical problem of measuring environment background interference exists in the prior art.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
With the specific work process of device, the corresponding process in preceding method embodiment is may be referred to, details are not described herein.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment the method for the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In the description of the present invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Easy to describe the present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for description purpose, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, is only the embodiment of the present invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify the technical solution described in previous embodiment or can be light
It is readily conceivable that change, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention answers the scope of the claims of being subject to.
Claims (9)
- A kind of 1. Low background α, β measuring device, it is characterised in that including：Main detector, anticoincidence detector and control circuit, Wherein, the main detector and the anticoincidence detector are connected with the control circuit respectively；The main detector is used to gather main detectable signal, and the main detectable signal is inputted to the control circuit, wherein, The main detectable signal is α, β ray produced based on sample, and/or, the detectable signal of radioactivity background generation；The anticoincidence detector is used to gather anticoincidence signal, and the anticoincidence signal is inputted to the control circuit, Wherein, the anticoincidence signal is the detectable signal based on radioactivity background generation；The control circuit is used for the main detectable signal and the anticoincidence signal determines carrying out α, β activity measurement to sample During whether disturbed be subject to radioactivity background, and when determining to be not affected by interference, count the survey of α, β activity measurement Measure result.
- 2. device according to claim 1, it is characterised in that the control circuit quantity is multiple, wherein,The main detector is connected with each control circuit respectively, for sending the main spy to each controller Survey signal；The anticoincidence detector is connected with each control circuit, for sending the anti-symbol to each controller Close signal.
- 3. device according to claim 1 or 2, it is characterised in that the control circuit includes：Discriminator circuit and logic fortune Circuit is calculated, wherein, the discriminator circuit includes the first discriminator circuit and the second discriminator circuit,First discriminator circuit is connected with the main detector, the main detection sent for obtaining the main detector Signal；Second discriminator circuit is connected with the anticoincidence detector, for obtaining the described anti-of the anticoincidence detector Meet signal；The logical operation circuit is connected with first discriminator circuit and second discriminator circuit respectively, for based on institute State the examination result of the first discriminator circuit and the examination result of second discriminator circuit determines carrying out sample the survey of α, β activity Whether disturbed during amount be subject to radioactivity background.
- 4. device according to claim 3, it is characterised in that first discriminator circuit includes：First screens sub-circuit, Second, which screens sub-circuit and the 3rd, screens sub-circuit；Wherein, it is described first screen sub-circuit, it is described two screen sub-circuit and it is described 3rd screen sub-circuit respectively with the master Detector is connected, the main detectable signal sent for obtaining the main detector respectively.
- 5. device according to claim 4, it is characterised in that the logical operation circuit includes：First and door, second with Door, the 3rd with door and NAND gate；Wherein, described first is connected with the input terminal of door with the output terminal of the described first examination sub-circuit；Described second is connected with the input terminal of door with the output terminal of described two examination sub-circuits；Described 3rd is connected with the input terminal of door with the output terminal of the described 3rd examination sub-circuit, and the described 3rd and gate output terminal It is connected respectively with described first with door and described second with the output terminal of door；Output terminal of the input terminal of the NAND gate respectively with the described 3rd examination sub-circuit and two discriminator circuit is connected, The output terminal of the NAND gate is connected with the described 3rd with door input terminal；Described first and door, described second and door, the described 3rd with door and the output terminal of the NAND gate respectively with microcontroller phase Connection.
- 6. device according to claim 3, it is characterised in that the control circuit further includes：First operational amplification circuit With the second operational amplification circuit, wherein,First operational amplification circuit is arranged between the main detector and first discriminator circuit, described for obtaining The main detectable signal of main detector output, and input to described first and screen after being amplified to the main detectable signal In circuit；Second operational amplification circuit is arranged between the anticoincidence detector and second discriminator circuit, for obtaining The anticoincidence signal of the anticoincidence detector output, and inputted after being amplified to the anticoincidence signal to described In second discriminator circuit.
- 7. device according to claim 1, it is characterised in that the main detector includes：Low background α, β twin scintillator, First low potassium photomultiplier and the first preposition amplification bleeder circuit, wherein, Low background α, β twin scintillator and described first Low potassium photomultiplier is connected, the input terminal of the first low potassium photomultiplier and the described first preposition amplification bleeder circuit It is connected；Low background α, β twin scintillator is used for α, β ray for absorbing sample generation, and/or, radioactivity background, and be based on α, β ray, and/or, the radioactivity background produces fluorescence；The first low potassium photomultiplier is used to the fluorescence being converted to electric signal；The first preposition amplification bleeder circuit is used to be amplified the electric signal, and the main detection letter is obtained after amplification Number.
- 8. device according to claim 1, it is characterised in that the anticoincidence detector includes：Anticoincidence scintillator, Two low potassium photomultipliers, the second preposition amplification bleeder circuit, wherein, before the second low potassium photomultiplier and described second The input terminal for putting big bleeder circuit is connected, and the output terminal of the second preposition amplification bleeder circuit is flickered with the anticoincidence Body is connected,The anticoincidence scintillator is used to absorb radioactivity background, and produces fluorescence based on the radioactivity background；The second low potassium photomultiplier is used to the fluorescence being converted to electric signal；The second preposition amplification bleeder circuit is used to be amplified the electric signal, and the anticoincidence letter is obtained after amplification Number.
- 9. device according to claim 1, it is characterised in that described device further includes：Host computer, the host computer and list Piece machine is connected, and is stored for obtaining the data of the microcontroller transmission, and to the data of microcontroller transmission.
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