CN107329163A - A kind of multichannel pulse size analyzer - Google Patents
A kind of multichannel pulse size analyzer Download PDFInfo
- Publication number
- CN107329163A CN107329163A CN201710664421.8A CN201710664421A CN107329163A CN 107329163 A CN107329163 A CN 107329163A CN 201710664421 A CN201710664421 A CN 201710664421A CN 107329163 A CN107329163 A CN 107329163A
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- size analyzer
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- pulse signal
- voltage pulse
- conversion modules
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- 230000003321 amplification Effects 0.000 claims abstract description 33
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 230000005855 radiation Effects 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000005405 multipole Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- G01T1/17—Circuit arrangements not adapted to a particular type of detector
Abstract
The present invention relates to a kind of multichannel pulse size analyzer, the analyzer includes the radiation detector for being used to measure nuclear radiation energy and output voltage pulse signal；For the filtering shaping module being filtered to the voltage pulse signal that radiation detector is exported；Amplification module for being amplified processing to the voltage pulse signal after filtering shaping module filtered；A/D conversion modules for data signal to be sampled and converted it into the voltage pulse signal after amplification；For being filtered processing, data peak-seeking to the data signal that A/D conversion modules are exported, multiple tracks is counted and multiple tracks is stored, and the count information in Bing Jiangge roads is uploaded to the FPGA data processing module of user terminal；The control module being controlled respectively to A/D conversion modules and amplification module.The multichannel pulse size analyzer of the present invention, which passes through, simplifies circuit, reduces production cost, by the way that the voltage pulse signal collected is digitized, improves the accuracy of analyzer measurement, it is to avoid test leakage pulse data.
Description
Technical field
The present invention relates to nuclear radiation detection technical field, and in particular to a kind of multichannel pulse size analyzer.
Background technology
In Nuclear Techniques and application field, it is often necessary to measure the power spectrum of ray, it is by amplitude by pulse signal
Size classified and record the number of every class signal, obtained data are depicted as spectrogram shape, ray just can be made a concrete analysis of
Species and radiation intensity.Nuclear radiation signal has extremely strong randomness, and waveform is complicated, by multipole signal process circuit
Afterwards, the signal rising edge of feeding multichannel pulse scope-analyzer is minimum, and frequency is higher, and instrument will measure the width of pulse signal one by one
Spend and not test leakage as far as possible, it is ensured that the accuracy of energy spectrum diagram.Existing multichannel pulse scope-analyzer is frequently with peak holding side
Formula measures peak pulse amplitude, but the discharge and recharge of electric capacity will take the more time, thus easily test leakage pulse data, with compared with
Big instrument dead time, or raising hardware cost make up dead time body defect using various means, but this can make the maintenance of instrument
It is difficult in maintenance, more it is difficult to large-scale promotion because price is high.
The content of the invention
It is an object of the invention to provide a kind of multichannel pulse size analyzer, exist to solve existing analytical instrument
The problem of easy test leakage pulse data and high instrument price.
To achieve the above object, the present invention provides a kind of multichannel pulse size analyzer, the multichannel pulse amplitude analysis
Instrument penetrates detector including core, and the radiation detector is used to measure nuclear radiation energy and output voltage pulse signal, the multiple tracks
Pulse size analyser also includes：
Electrically connected with the radiation detector, for being filtered to the voltage pulse signal that the radiation detector is exported
Filtering shaping module；
Electrically connected with the filtering shaping module, for entering to the voltage pulse signal after the filtering shaping module filtered
The amplification module of row enhanced processing；
Electrically connected with the amplification module, for number to be sampled and converted it into the voltage pulse signal after amplification
The A/D conversion modules of word signal；
Electrically connected respectively with A/D conversion modules, user terminal, for the data signal exported to the A/D conversion modules
It is filtered processing, data peak-seeking, multiple tracks is counted and multiple tracks is stored, the count information in Bing Jiangge roads is uploaded to user terminal
FPGA data processing module；
Electrically connect, respectively A/D conversion modules and amplification module are controlled with amplification module, A/D conversion modules respectively
Control module.
It is preferred that, the multichannel pulse size analyzer also includes display, the display and control module electricity
Connection, the display is used to show the gain after voltage pulse signal amplification.
It is preferred that, the multichannel pulse size analyzer also includes gain-adjusted knob, the gain-adjusted knob
The gain amplified for setting voltage pulse signal to need.
It is preferred that, the display is LCD display.
It is preferred that, the control module is single-chip microcomputer.
It is preferred that, the FPGA data processing module is communicated with the user terminal by UART serial line interfaces.
It is preferred that, the user terminal is computer.
The invention has the advantages that：The multichannel pulse size analyzer of the present invention is produced into by simplifying circuit, reduction
This, by the way that the voltage pulse signal collected is digitized, improves the accuracy of analyzer measurement, it is to avoid test leakage umber of pulse
According to.
Brief description of the drawings
Fig. 1 is the structured flowchart of multichannel pulse size analyzer of the present invention.
Fig. 2 is the specific line map of amplification module of the present invention.
Fig. 3 is the specific line map of A/D conversion modules of the present invention.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
As shown in figure 1, the multichannel pulse size analyzer 100 includes radiation detector 1, filtering shaping module 2, amplification mould
Block 3, A/D conversion modules 4, FPGA data processing module 5 and control module 6, filtering shaping module 2 are electrically connected with radiation detector 1
Connect, amplification module 3 is electrically connected with filtering shaping module 2, and A/D conversion modules 4 are electrically connected with amplification module 3, FPGA data processing
Module 5 is electrically connected with A/D conversion modules 4, user terminal 7 respectively, control module 6 respectively with amplification module 3, A/D conversion modules 4
Electrical connection, multichannel pulse size analyzer 100 of the invention reduces production cost, analog signal is in transmission by simplifying circuit
During and the noise of superposition be difficult separation, noise can be transmitted with signal, amplify, have a strong impact on the accurate of analyzer measurement
Property, and by the way that the voltage pulse signal collected is digitized, as long as digitized signal absolute value of noise is no more than a certain thresholding
Value, receiving terminal just can differentiate that voltage pulse signal is digitized and whether there is, so as to improve the accuracy of analyzer measurement, it is to avoid
Test leakage pulse data.
Radiation detector 1 is used to measure nuclear radiation energy and output voltage pulse signal, and voltage pulse signal carries core
The energy information of radiation, the voltage pulse signal that radiation detector 1 is exported first has to shaping module 2 after filtering and it is filtered
Ripple, is close to meet the Gaussian waveform of sampling request and can keep the core spoke entrained by detector output signal without distortion
The energy information penetrated.
Fig. 2 is the specific line map of amplification module 3, and amplification module 3 is used for the filtering filtered voltage arteries and veins of shaping module 2
Rush signal and carry out Linear Amplifer, improve signal intensity, combined by radiation detector 1 with amplification module 3, it is possible to reduce radiation is visited
The output end of device 1 is surveyed to the distribution capacity influence of shaping amplification input, signal to noise ratio is improved；Simultaneously can be with being connected the high frequency of signal
Cable matches.Particularly important for the linear problem of this main amplifier, the design proposes to adjust function from programme-controlled gain
Amplification chip AD603, disclosure satisfy that signal multiple is linear and adjustable require.From programming amplifying chip AD603, the chip noise
Low, bandwidth gain is up to 90MHz.The adjustment of gain and control voltage difference Vg are linear, control voltage difference Vg input pins
Resistance be up to 50M Ω, its slew rate be 275V/ μ s.The circuit of amplification module 3 is -10~+30dB, choosing using gain ranging
Select maximum bandwidth 90MHz, control voltage difference Vg is CTL Vg and VRef port voltages difference, difference range be -500mV~
500mV, VRef end are fixed voltage, and CTL Vg voltages are exported for digital analog converter, and letter can be preferably realized by the method
Number Linear Amplifer.
Fig. 3 is the specific line map of A/D conversion modules 4, and A/D conversion modules 4 are used for the voltage pulse signal after amplification
Sampled and convert it into data signal, in the measurement process of multichannel pulse size analyzer 100, voltage pulse signal
Digital quantization error be also influence energy resolution important factor.High-resolution analog-digital converter is used in the present embodiment
AD9226 chips make digital quantization.AD9226 chips take single supply to power, with 12 precision, data parallel output, sampling
Frequency is up to 65MHz, the high performance sample/hold amplifier of AD9226 core Embeddeds and 2.0V reference data voltage sources,
AD9226 chips use multi-level differential flowing structure, with error correcting function, are being sampled so as to improve A/D conversion modules 4
Energy resolution in journey, A/D conversion modules 4 support Differential Input mode, and during the input of differential analog signal, A/D conversions
Module 4 all obtains optimum performance in terms of total harmonic distortion and SFDR.
FPGA data processing module 5 is supplied to the sampling clock of A/D conversion modules 4, the numeral letter that A/D conversion modules 4 are exported
Number enter in FPGA data processing module 5, the influence that random noise is brought excluded by Kalman filter after data outflow team,
Random voltages peak value of pulse is captured according to the peak-seeking algorithm of design, the data peaks shunting location of data is counted cumulative and carried out
Storage, after acquisition time terminates, FPGA data processing module 5 will be stored in by UART serial line interfaces using UART communication protocols
Wherein each road location count information upload user terminal 7 carries out energy spectrum analysis.UART communication protocols can realize full transmitted in both directions
And reception, under certain baud rate, the low error rate of data transmission is reliable and stable.
Control module 6 is single-chip microcomputer in the present embodiment, and control module 6 is used to be controlled amplification module 3, makes amplification
The control instruction that module 3 is sent according to control module 6 carries out also setting up in Linear Amplifer, control module 6 to voltage pulse signal
There is digital-to-analogue conversion program, control module 6 can control the control instruction that A/D conversion modules 4 are sent according to control module 6 to voltage
Pulse signal is sampled.
Further, the multichannel pulse size analyzer 100 in the present embodiment also includes display 8, display 8 and control
Module 6 is electrically connected, and display 8 is used for the gain for showing voltage pulse signal amplification, and display 8 is LCD display, display 8
It is driven by control module 6.
Further, the multichannel pulse size analyzer 100 in the present embodiment also includes gain-adjusted knob 9, by turning
Amplification target value is sent to control module 6 by dynamic gain-adjusted knob 9, and the control that control module 6 is sent to amplification module 3 refers to
Order, amplification module 3 according to control instruction to voltage pulse signal carry out Linear Amplifer, therefore, can by gain-adjusted knob 9 come
Set voltage pulse signal to need the gain amplified, reach optimal amplification effect.
User terminal 7 is computer in the present embodiment, and the programming of user terminal 7 is intended using Visual C++ platforms,
Nuclear radiation gamma-spectrometric data can be carried out by means of VC platforms to show, data process＆analysis (such as energy spectrum peak-seeking, Energy Conversion), number
According to management (such as gamma-spectrometric data is read and storage).Meanwhile, various configuration parameters can be also configured by means of VC platforms, are such as adopted
The sample cycle, spectrum length, baud rate, observing interval, observation period etc., to meet the observation requirement that user is different.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be modified or improved, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (7)
1. a kind of multichannel pulse size analyzer, the multichannel pulse size analyzer includes radiation detector, the radiation is visited
Surveying device is used to measure nuclear radiation energy and output voltage pulse signal, it is characterised in that the multichannel pulse size analyzer is also
Including：
Electrically connected with the radiation detector, for the filter being filtered to the voltage pulse signal that the radiation detector is exported
Ripple shaping module；
Electrically connected with the filtering shaping module, for being put to the voltage pulse signal after the filtering shaping module filtered
The amplification module handled greatly；
Electrically connected with the amplification module, for digital letter to be sampled and converted it into the voltage pulse signal after amplification
Number A/D conversion modules；
Electrically connected respectively with A/D conversion modules, user terminal, the data signal for being exported to the A/D conversion modules is carried out
Filtering process, data peak-seeking, multiple tracks are counted and multiple tracks storage, and the count information in Bing Jiangge roads is uploaded to the FPGA of user terminal
Data processing module；
Electrically connected respectively with amplification module, A/D conversion modules, the control being controlled respectively to A/D conversion modules and amplification module
Molding block.
2. multichannel pulse size analyzer according to claim 1, it is characterised in that the multichannel pulse size analyzer
Also include display, the display is electrically connected with the control module, the display is used to show that voltage pulse signal is put
Gain after big.
3. multichannel pulse size analyzer according to claim 2, it is characterised in that the multichannel pulse size analyzer
Also include gain-adjusted knob, the gain-adjusted knob is used to set voltage pulse signal to need the gain amplified.
4. multichannel pulse size analyzer according to claim 2, it is characterised in that the display is LCD display.
5. multichannel pulse size analyzer according to claim 1, it is characterised in that the control module is single-chip microcomputer.
6. multichannel pulse size analyzer according to claim 1, it is characterised in that the FPGA data processing module with
The user terminal is communicated by UART serial line interfaces.
7. multichannel pulse size analyzer according to claim 5, it is characterised in that the user terminal is computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664421.8A CN107329163A (en) | 2017-07-31 | 2017-07-31 | A kind of multichannel pulse size analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664421.8A CN107329163A (en) | 2017-07-31 | 2017-07-31 | A kind of multichannel pulse size analyzer |
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| Publication Number | Publication Date |
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| CN107329163A true CN107329163A (en) | 2017-11-07 |
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| CN201710664421.8A Pending CN107329163A (en) | 2017-07-31 | 2017-07-31 | A kind of multichannel pulse size analyzer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469551A (en) * | 2018-05-25 | 2018-08-31 | 河北工业大学 | A kind of multichannel small capacitance signal acquisition processing circuit |
| CN108964637A (en) * | 2018-05-18 | 2018-12-07 | 成都理工大学 | A kind of superelevation percent of pass current mode digitized pulse processing method based on FPGA |
| CN109597112A (en) * | 2018-12-28 | 2019-04-09 | 中国科学院国家空间科学中心 | A kind of aviation combined radiation dosimetry system |
| CN110082808A (en) * | 2018-11-29 | 2019-08-02 | 绵阳市维博电子有限责任公司 | One kind is based on core pulse signal quick detection and recognition methods under complex background |
| CN110347965A (en) * | 2019-07-17 | 2019-10-18 | 四川新先达测控技术有限公司 | Core pulse signal processing method and processing device |
| CN112817028A (en) * | 2020-12-29 | 2021-05-18 | 上海工物高技术产业发展有限公司 | Multichannel analyzer zero clearing method, device and system and storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964637A (en) * | 2018-05-18 | 2018-12-07 | 成都理工大学 | A kind of superelevation percent of pass current mode digitized pulse processing method based on FPGA |
| CN108469551A (en) * | 2018-05-25 | 2018-08-31 | 河北工业大学 | A kind of multichannel small capacitance signal acquisition processing circuit |
| CN108469551B (en) * | 2018-05-25 | 2023-08-01 | 河北工业大学 | Multipath tiny capacitance signal acquisition processing circuit |
| CN110082808A (en) * | 2018-11-29 | 2019-08-02 | 绵阳市维博电子有限责任公司 | One kind is based on core pulse signal quick detection and recognition methods under complex background |
| CN109597112A (en) * | 2018-12-28 | 2019-04-09 | 中国科学院国家空间科学中心 | A kind of aviation combined radiation dosimetry system |
| CN110347965A (en) * | 2019-07-17 | 2019-10-18 | 四川新先达测控技术有限公司 | Core pulse signal processing method and processing device |
| CN110347965B (en) * | 2019-07-17 | 2023-02-03 | 四川新先达测控技术有限公司 | Nuclear pulse signal processing method and device |
| CN112817028A (en) * | 2020-12-29 | 2021-05-18 | 上海工物高技术产业发展有限公司 | Multichannel analyzer zero clearing method, device and system and storage medium |
| CN112817028B (en) * | 2020-12-29 | 2024-02-13 | 上海工物高技术产业发展有限公司 | Multichannel analyzer resetting method, multichannel analyzer resetting device, multichannel analyzer resetting system and storage medium |
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Effective date of registration: 20180503 Address after: 621010 Mian Xingdong Road, hi tech Zone, Fucheng District, Mianyang, Sichuan, 133 Applicant after: SICHUAN NANTANG TECHNOLOGY CO.,LTD. Applicant after: Southwest University of Science and Technology Applicant after: Liu Xiaonan Address before: 621010 Mian Xingdong Road, hi tech Zone, Fucheng District, Mianyang, Sichuan, 133 Applicant before: SICHUAN NANTANG TECHNOLOGY CO.,LTD. Applicant before: Liu Xiaonan |
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Application publication date: 20171107 |