CN106054236A - Dual-channel multifunctional digital nuclear spectrometer - Google Patents
Dual-channel multifunctional digital nuclear spectrometer Download PDFInfo
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- CN106054236A CN106054236A CN201610560004.4A CN201610560004A CN106054236A CN 106054236 A CN106054236 A CN 106054236A CN 201610560004 A CN201610560004 A CN 201610560004A CN 106054236 A CN106054236 A CN 106054236A
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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
- G01T1/36—Measuring spectral distribution of X-rays or of nuclear radiation spectrometry
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- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
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- Measurement Of Radiation (AREA)
Abstract
The invention discloses a dual-channel multifunctional digital nuclear spectrometer comprising a first pulse shaping unit, a second pulse shaping unit, a first analog-to-digital conversion unit, a second analog-to-digital conversion unit, an algorithm design unit and a data transmission unit. The first pulse shaping unit is connected with the first analog-to-digital conversion unit. The second pulse shaping unit is connected with the second analog-to-digital conversion unit. The first analog-to-digital conversion unit and the second analog-to-digital conversion unit are connected with the algorithm design unit. The algorithm design unit is connected with the data transmission unit. Two channels are formed by using two pulse shaping units and two digital-to-analog conversion units. A pulse peak-seek algorithm and a digital constant ratio timing algorithm are performed through an FPGA chip so that energy information and time information are acquired, the flexibility of the signal processing process is enhanced, different parameter settings can be given for different input signals, the equipment universality can be enhanced, and one set of system can be used for measurement of different signal energy spectrums and time spectrums of different occasions.
Description
Technical field
The invention belongs to Application of Nuclear Technology field, relate to a kind of digital nuclear spectrometer, specifically a kind of double-channel multifunctional
Digital nuclear spectrometer.
Background technology
In Application of Nuclear Technology, it usually needs obtain particle or the energy of ray and temporal information.Particle or the essence of ray
Really temporal information is to use constant fraction discriminator discriminator to obtain, and energy information is to be obtained by integral amplifier.Constant fraction discriminator
Discriminator is presently mainly and uses simulation constant fraction discriminator circuit to realize, and uses simulation timing circuit to provide timing signal, then by
Time-to-digit converter quantifies, and by host computer, temporal information is carried out statistics and analysis, it is possible to obtain time required
Between power spectrum, its simulation circuit structure is complex, and system equipment is huge, and function singleness, can only carry out time spectrum measurement, nothing
Method tests accurate power spectrum.Although integral energy spectrum amplifier can calculate the power spectrum of particle or ray, but cannot obtain accurately
Temporal information.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is provided that a kind of double-channel multifunctional digital nuclear spectrometer, carry out simultaneously
Particle or the power spectrum of ray and the measurement of time spectrum, and real-time online process can be carried out.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of double-channel multifunctional digital nuclear spectrometer, including first for processing the output signal of detector
Pulse shaping unit and the second pulse shaping unit, for converting analog signals into the first AD conversion unit of digital signal
With the second AD conversion unit, it is used for realizing constant fraction discriminator algorithm and the algorithm design cell of pulse peak-seeking algorithm, based on inciting somebody to action
The data obtained are transferred to terminal and carry out processed offline, the data transmission unit analyzed and preserve；
The first described pulse shaping unit connects the first AD conversion unit, and the second described pulse shaping unit connects
Second AD conversion unit, the first described AD conversion unit and the second AD conversion unit be all connected with algorithm design cell,
Described algorithm design cell connects data transmission unit.
Further, the first described pulse shaping unit and the second pulse shaping unit all include for detector is defeated
Go out the amplifier that signal amplifies, for the pole-zero cancellation chip to signal pole-zero cancellation, for signal being filtered process
Bessel filter, for the single-ended transfer difference chip to signal single-ended transfer difference；Described amplifier connects pole-zero cancellation core
Sheet, described pole-zero cancellation chip connects Bessel filter, and described Bessel filter connects single-ended transfer difference chip.
Further, the first described AD conversion unit and the second AD conversion unit all use digital to analog converter.
Further, described algorithm design cell uses fpga chip.
Further, described data transmission unit includes Ethernet interface and USB interface.
Beneficial effects of the present invention: the present invention utilizes two pulse shaping units and two AD conversion unit to form two
Passage, carries out pulse peak-seeking algorithm and numeral constant fraction discriminator algorithm by fpga chip, obtains energy information and temporal information, carry
The high motility of signal processing, can provide different parameters for different input signals and arrange, reduce instrument
The difficulty of design, simplifies system structure, it is achieved that hardware designs software implementation, improves the integrated level of system, enhance equipment
Versatility, use set of system to may be used for different occasion unlike signal power spectrum and the measurement of time spectrum.
Accompanying drawing explanation
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the system structure schematic diagram of the present invention.
Fig. 2 is the workflow diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, those of ordinary skill in the art obtained under not making creative work premise all other
Embodiment, broadly falls into the scope of protection of the invention.
As shown in Figure 1-2, the invention provides a kind of double-channel multifunctional digital nuclear spectrometer, including for detector
Output signal carry out the first pulse shaping unit and the second pulse shaping unit that process, be used for converting analog signals into number
First AD conversion unit of word signal and the second AD conversion unit, be used for realizing constant fraction discriminator algorithm and pulse peak-seeking algorithm
Algorithm design cell, carry out processed offline for calculated data being transferred to terminal, analyze and preserve
Data transmission unit.
First pulse shaping unit and the second pulse shaping unit are all connected with detector, and the first pulse shaping unit connects the
One AD conversion unit, the second pulse shaping unit connects the second AD conversion unit, the first AD conversion unit and the second mould
Number conversion unit is all connected with algorithm design cell, and algorithm design cell connects data transmission unit, and data transmission unit connects meter
Calculation machine terminal.
First pulse shaping unit and the second pulse shaping unit all include for putting of being amplified by detector output signal
Big device, for the pole-zero cancellation chip to signal pole-zero cancellation, for signal is filtered the Bessel filter processed, uses
In the single-ended transfer difference chip to signal single-ended transfer difference, wherein amplifier connects pole-zero cancellation chip, and pole-zero cancellation chip is even
Connecing Bessel filter, Bessel filter connects single-ended transfer difference chip.
First AD conversion unit and the second AD conversion unit all use analog-digital converter, are exported by pulse shaping unit
Analogue signal be converted to digital signal and export algorithm design cell.
Algorithm design cell uses fpga chip, calculates by digital signal is filtered, removes baseline and pulse peak-seeking
Method obtains energy information, obtains temporal information by digital signal carries out numeral constant fraction discriminator algorithm, with total digitalization means
The complete whole field datas retaining nuclear incident, it is possible to one-shot measurement obtains energy, time, particle types etc. from pulse train
A whole set of information, system structure is simple, and algorithm is easy to adjust.
Data transmission unit includes connecting the Ethernet interface of terminal computer by Ethernet and being connected by USB data line
Connect the USB interface of terminal computer.
When particle is carried out energy measurement, the first pulse shaping unit and the first AD conversion unit form first and lead to
Road, the second pulse shaping unit and the second AD conversion unit form second channel, enter into algorithm after analog signal digital
In design cell, digital signal is filtered, removes baseline and pulse peak-seeking calculates, finally calculate the energy peak of pulse
Value, then by data transmission unit, is transferred to terminal the data obtained calculated, the data produced are carried out from
Line processes, analyzes and preserve.
When particle is carried out measure of time, the first pulse shaping unit and the first AD conversion unit form first and lead to
Road, inputs start signal, the second pulse shaping unit and the second AD conversion unit and forms second channel, input stop signal,
This pair signal enters into algorithm design cell after being respectively converted into digital signal, then is filtered two paths of signals respectively, goes
Except baseline and digitized constant fraction discriminator calculate, finally give the time difference of start and stop passage, through data transmission unit
It is transferred to terminal, and the data of transmission are processed in real time and analyze, it is possible to obtain time spectrum.
The present invention utilizes two pulse shaping units and two D/A conversion units to form two passes, passes through fpga chip
Carry out pulse peak-seeking algorithm and numeral constant fraction discriminator algorithm, obtain energy information and temporal information, improve signal processing
Motility, different parameter can be provided for different input signals and arrange, reduce the difficulty of instrument design, simplify
System structure, it is achieved that hardware designs software implementation, improves the integrated level of system, enhances the versatility of equipment, uses a set of
System may be used for different occasion unlike signal power spectrum and the measurement of time spectrum.
In the description of this specification, the description of reference term " embodiment ", " example ", " concrete example " etc. means
Specific features, structure, material or feature in conjunction with this embodiment or example description is contained at least one enforcement of the present invention
In example or example.In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.
And, the specific features of description, structure, material or feature can be to close in any one or more embodiments or example
Suitable mode combines.
Above content is only to present configuration example and explanation, affiliated those skilled in the art couple
Described specific embodiment makes various amendment or supplements or use similar mode to substitute, without departing from invention
Structure or surmount scope defined in the claims, all should belong to protection scope of the present invention.
Claims (5)
1. a double-channel multifunctional digital nuclear spectrometer, it is characterised in that: include for the output signal of detector is carried out
The first pulse shaping unit processed and the second pulse shaping unit, for converting analog signals into the first mould of digital signal
Number conversion unit and the second AD conversion unit, single for realizing the algorithm design of constant fraction discriminator algorithm and pulse peak-seeking algorithm
Unit, carries out processed offline, the data transmission unit analyzed and preserve for calculated data are transferred to terminal；
The first described pulse shaping unit connects the first AD conversion unit, and the second described pulse shaping unit connects second
AD conversion unit, the first described AD conversion unit and the second AD conversion unit are all connected with algorithm design cell, described
Algorithm design cell connect data transmission unit.
A kind of double-channel multifunctional digital nuclear spectrometer the most according to claim 1, it is characterised in that: the first described arteries and veins
Rush shaping unit and the second pulse shaping unit all includes the amplifier for being amplified by detector output signal, for signal
The pole-zero cancellation chip of pole-zero cancellation, for being filtered the Bessel filter processed, for single-ended turn of signal to signal
The single-ended transfer difference chip of difference；Described amplifier connects pole-zero cancellation chip, and described pole-zero cancellation chip connects shellfish plug
That wave filter, described Bessel filter connects single-ended transfer difference chip.
A kind of double-channel multifunctional digital nuclear spectrometer the most according to claim 1, it is characterised in that: the first described mould
Number conversion unit and the second AD conversion unit all use analog-digital converter.
A kind of double-channel multifunctional digital nuclear spectrometer the most according to claim 1, it is characterised in that: described algorithm sets
Meter unit uses fpga chip.
A kind of double-channel multifunctional digital nuclear spectrometer the most according to claim 1, it is characterised in that: described data pass
Defeated unit includes Ethernet interface and USB interface.
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| CN201610560004.4A CN106054236A (en) | 2016-07-15 | 2016-07-15 | Dual-channel multifunctional digital nuclear spectrometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427136A (en) * | 2018-01-03 | 2018-08-21 | 沈阳东软医疗系统有限公司 | A kind of detector timing means and detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427136A (en) * | 2018-01-03 | 2018-08-21 | 沈阳东软医疗系统有限公司 | A kind of detector timing means and detector |
| CN108427136B (en) * | 2018-01-03 | 2019-11-12 | 东软医疗系统股份有限公司 | A kind of detector timing means and detector |
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