CN205176285U - Anticoincidence output system of examineing - Google Patents
Anticoincidence output system of examineing Download PDFInfo
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- CN205176285U CN205176285U CN201520998057.5U CN201520998057U CN205176285U CN 205176285 U CN205176285 U CN 205176285U CN 201520998057 U CN201520998057 U CN 201520998057U CN 205176285 U CN205176285 U CN 205176285U
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Abstract
The utility model discloses an anticoincidence output system of examineing, main detector output pulse collector divide into two the tunnel after being connected with a pulse forming module, are connected with pulse amplitude discriminator, temporary storage, controller, delayer in proper order all the way, and output module is connected to the delayer, and time discriminator is connected on another way, supplementary detector pulse collector is connected the back with another pulse forming module and is connected with time discriminator, and time discriminator is connected with the controller. The beneficial effects are that only rely on 2 main and auxiliary detector output signal just can realize the purpose of examineing, realized the simplification to whole measurement system.
Description
Technical field
The utility model belongs to radiation detecting apparatus technical field, relates to a kind of anticoincidence and exports discrimination system.
Background technology
" under high background condition low content radiological measuring " technology is subject to concern (H.Oeschger, 1975 of Chinese scholars always for a long time; KenichiNogami, 1978; The ó rssonP.1991; Zheng Renqi, 1985,1995; Li Deping, 1994; Huang Naiming, 2004; Deng).
The low local gamma spectrum anticoincidence major part of existing environment adopts the mode of multiple detector coupling measurement, object (P.P.Povinec, 1996 of realize reducing sample-out count, effectively extracting target species Radioactive information; A.Chernyaev, 2004; Etal).
Mainly use in office analysis for existing Low background gamma-rays anticoincidence detector, generally comprise three detectors: main detector, auxiliary detector, plastic annular detector, corresponding anticoincidence circuit is also be made up of, as Fig. 1 three parts.The B signal input of a-signal and annular detector Pulse sampling device that main detector exports Pulse sampling device can input with residue two respectively and form anticoincidence.The A road signal of main detector output Pulse sampling device can block the B signal of annular detector Pulse sampling device, when namely main detector exports Pulse sampling device a-signal generation output, is blocked being made the B signal of annular detector Pulse sampling device by anticoincidence.The C input signal of auxiliary detector Pulse sampling device can block the output that main detector exports Pulse sampling device, annular detector Pulse sampling device.Discriminator will be triggered when the input signal of auxiliary detector Pulse sampling device meets or exceeds discriminator and produce output signal.Output after this signal transacting can block the output that main detector exports Pulse sampling device, annular detector Pulse sampling device, this type systematic only can meet event from differentiation the time, cannot distinguish exactly to meet when sample-out count is higher and meet with vacation, also just cannot by artificial radionuclide characteristic information high efficiency extraction from background.
The domestic patent research present situation about environmental γ spectroscopy detection system mainly contains: " ocean original position Anticoincidence shield gamma energy spectrometer " (CN203502589U) of the people such as the Cheong Kuoc Va of Oceanic Instruments & Meters Inst., Shandong Prov. Academy of Sciences, " the Low background gamma energy spectrometer for Marine Radioactivity is measured " (CN103217702A) of the people such as Zhang Yingying, Tsing-Hua University's journey builds equality people " a kind of combination screened room of Low background gamma ray spectrometer " (CN103675887A) etc.The anticoincidence discrimination system related in above patent mainly concentrates on lab analysis and in-situ study field, ocean, measuring system is larger, and be similar in the utility model be applied to conbined usage pulse height in portable environment low-activity detecting instrument the time carry out meeting the system of examination and algorithm have not been reported.
Utility model content
The purpose of this utility model is to provide a kind of anticoincidence and exports discrimination system, existing only examination from 3 detector output signals of dependence the burst length is met event, change into and only rely on main and auxiliary 2 detector output signals just can realize the object of screening, achieve the simplification to whole measuring system.
The technical scheme that the utility model adopts is, a kind of anticoincidence exports discrimination system, comprises main detector and exports Pulse sampling device and auxiliary detector Pulse sampling device; Main detector is divided into two-way after exporting Pulse sampling device and a pulse-shaping model calling, and a road is connected with pulse-amplitude discriminator, working storage, controller, delayer successively, and delayer connects output module, another road tie-time discriminator; Auxiliary detector Pulse sampling device is connected with time discriminator with after another pulse-shaping model calling, and time discriminator is connected with controller.
The beneficial effects of the utility model are: existing anticoincidence discrimination system serves primarily in experiment desk research and bulky measurement equipment, along with the increase to portable Low background gamma spectrum measurement demand, the miniaturization of anticoincidence discrimination system also becomes increasingly urgent, the utility model is that portable anti-Compton detector Aided design exports discrimination system, by existing dependence 3 detector output signals, change into and only rely on master, auxiliary 2 detector output signals just can realize the object that anticoincidence reduces background, achieve the redesign to such detection system, reduce instrument cost to the full extent.Meanwhile, because this discrimination system only has two signalling channels, intermediate node number reduces to some extent, improves 100% compared with the stability of prior art system.
Accompanying drawing explanation
Fig. 1 is existing anticoincidence system architecture schematic diagram.
Fig. 2 is that in the utility model, anticoincidence exports discrimination system structural representation.
Fig. 3 is that algorithm fundamental diagram is screened in anticoincidence.
In figure, 1, main detector exports Pulse sampling device, 2, annular detector Pulse sampling device, 3, auxiliary detector Pulse sampling device, 4, pulse-shaping module, 5, delayer, 6, time discriminator, 7, output module, 8, pulse-amplitude discriminator, 9, working storage, 10, controller.
Embodiment
The utility model anticoincidence exports the structure of discrimination system as shown in Figure 2, comprises main detector and exports Pulse sampling device 1 and auxiliary detector Pulse sampling device 3; Main detector exports after Pulse sampling device 1 is connected with a pulse-shaping module 4 and is divided into two-way, one tunnel is connected with pulse-amplitude discriminator 8, working storage 9, controller 10, delayer 5 successively, two output modules 7 are connect respectively, another road tie-time discriminator 6 after delayer 5; Be connected with time discriminator 6 after auxiliary detector Pulse sampling device 3 is connected with another pulse-shaping module 4, time discriminator 6 is connected with controller 10.
Based on pulse height temporal joint anticoincidence screen algorithm, principle of work as shown in Figure 3, is specifically carried out according to following steps:
Above-mentioned anticoincidence is adopted to export discrimination system: main detector exports after Pulse sampling device 1 is connected with a pulse-shaping module 4 and is divided into two-way, one tunnel is connected with pulse-amplitude discriminator 8, working storage 9, controller 10, delayer 5 successively, two output modules 7 are connect respectively, another road tie-time discriminator 6 after delayer 5; Be connected with time discriminator 6 after auxiliary detector Pulse sampling device 3 is connected with another pulse-shaping module 4, time discriminator 6 is connected with controller 10;
When signal arrives, first by pulse-shaping module 4, nuclear signal is shaped as full sized pules signal, the pulse amplitude exported by pulse-amplitude discriminator 8 paired pulses forming module 4 is afterwards screened; When output pulse amplitude is lower than (tentatively regarding as useful information) during threshold value, by pulse signal stored in working storage 9; The information such as amplitude, time of pulse signal is retained in working storage 9;
The burst length after shaping exported by time discriminator 6 pairs of main detectors output Pulse sampling devices 1, auxiliary detector Pulse sampling devices 3 is screened; Export the examination result of Pulse sampling device 1 output pulse amplitude simultaneously in conjunction with amplitude discriminator 8 pairs of main detectors, whether differentiating for meeting event, then terminating if meet event; Otherwise controller 10 triggers and exports control signal, by buffer memory pulse stored in delayer 5, and is exported by output module 7.
Wherein, meet event to refer to: have in nuclear physics and manyly occur simultaneously or occur in short time interval and be called in the dependent event of causal relation in having to meet event, this event often reflects the characteristics of motion of atomic nucleus inherence, as nuclear cascade decay be relevant in time between the particle that radiates, the average time interval of cascade decay is determined.Some measurement will be got rid of and meet event, and this system is just called as anticoincidence system, and anticoincidence circuit has τ resolving time determined, if detector record that one group of time interval is less than τ respectively meet event, anticoincidence circuit pulse-free signal exports; On the contrary, if recording events interval is greater than τ, circuit output pulse signal (come from " atomic nuclear physics test method " Peking University of Tsing-Hua University of Fudan University and compile Atomic Energy Press's publication).
Claims (2)
1. anticoincidence exports a discrimination system, it is characterized in that, comprises main detector and exports Pulse sampling device (1) and auxiliary detector Pulse sampling device (3); Main detector exports after Pulse sampling device (1) is connected with a pulse-shaping module (4) and is divided into two-way, one tunnel is connected with pulse-amplitude discriminator (8), working storage (9), controller (10), delayer (5) successively, delayer (5) connects output module (7), another road tie-time discriminator (6); Be connected with time discriminator (6) after auxiliary detector Pulse sampling device (3) is connected with another pulse-shaping module (4), time discriminator (6) is connected with controller (10).
2. a kind of anticoincidence according to claim 1 exports discrimination system, it is characterized in that, connects two output modules (7) after described delayer (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520998057.5U CN205176285U (en) | 2015-07-19 | 2015-12-07 | Anticoincidence output system of examineing |
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| CN201520523994 | 2015-07-19 | ||
| CN2015205239945 | 2015-07-19 | ||
| CN201520998057.5U CN205176285U (en) | 2015-07-19 | 2015-12-07 | Anticoincidence output system of examineing |
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| CN205176285U true CN205176285U (en) | 2016-04-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425275A (en) * | 2015-07-19 | 2016-03-23 | 成都理工大学 | Anti-coincidence output discrimination system and anti-coincidence discrimination algorithm thereof |
| CN112068180A (en) * | 2020-09-15 | 2020-12-11 | 成都理工大学 | Online measuring device and method for alpha and beta radioactive nuclides in water body |
| CN112083471A (en) * | 2020-09-15 | 2020-12-15 | 成都理工大学 | anti-Compton aviation gamma energy spectrum measuring system and measuring method thereof |
-
2015
- 2015-12-07 CN CN201520998057.5U patent/CN205176285U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425275A (en) * | 2015-07-19 | 2016-03-23 | 成都理工大学 | Anti-coincidence output discrimination system and anti-coincidence discrimination algorithm thereof |
| CN105425275B (en) * | 2015-07-19 | 2017-04-19 | 成都理工大学 | Anti-coincidence output discrimination system |
| CN112068180A (en) * | 2020-09-15 | 2020-12-11 | 成都理工大学 | Online measuring device and method for alpha and beta radioactive nuclides in water body |
| CN112083471A (en) * | 2020-09-15 | 2020-12-15 | 成都理工大学 | anti-Compton aviation gamma energy spectrum measuring system and measuring method thereof |
| CN112083471B (en) * | 2020-09-15 | 2022-12-06 | 成都理工大学 | anti-Compton aviation gamma energy spectrum measuring system and measuring method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20181207 |