CN202904029U - Low-power nuclear signal pulse amplitude analyzer - Google Patents
Low-power nuclear signal pulse amplitude analyzer Download PDFInfo
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- CN202904029U CN202904029U CN 201220556597 CN201220556597U CN202904029U CN 202904029 U CN202904029 U CN 202904029U CN 201220556597 CN201220556597 CN 201220556597 CN 201220556597 U CN201220556597 U CN 201220556597U CN 202904029 U CN202904029 U CN 202904029U
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Abstract
The utility model provides a low-power nuclear signal pulse amplitude analyzer which comprises a detected nuclear pulse signal, a signal conditioning circuit, an over-peak detection circuit, a threshold discrimination circuit, a peak value holding circuit, a control circuit, a peak value conversion ADC and a peak value data processing unit, wherein the detected nuclear pulse signal is connected with an input end of the signal conditioning circuit, the detected nuclear pulse signal is respectively connected with the threshold discrimination circuit and the over-peak detection circuit after passing through the signal conditioning circuit, an over-threshold signal discriminated by the threshold discrimination circuit and an over-peak signal detected by the over-peak detection circuit are respectively connected with the control circuit, an output end of the control circuit is connected with the peak value holding circuit and the peak value conversion ADC to provide a holding control signal and a starting conversion signal for the peak value holding circuit and the peak value conversion ADC respectively, and the peak value conversion ADC is connected with the peak value data processing unit.
Description
Technical field
The utility model relates to the nuclear radiation signal field of detecting, is specifically related to nuclear signal pulse height technology for information acquisition.
Background technology
Multichannel pulse scope-analyzer (MCA) is the core circuit of nuclear spectrum measurement, realizes that mainly nuclear signal is with the function of energy distribution.It carries out analog to digital conversion to the signal from amplifier on the one hand, stores simultaneously transformation result; On the other hand the transformation result of storage is carried out data analysis and directly show or give computing machine by computer interface and carry out data and process and show.In portable nuclear spectrum measurement instrument, except the performance requirement that must satisfy power spectrum, also have the requirements such as low-power consumption, small size, low cost.Therefore, multichannel pulse scope-analyzer low-power consumption miniaturization is developing direction from now on.
Press the realization technology of peak detection circuit, existing MCA can be divided into numeric type and analogue type.Digital MCA is take high-speed controller as core, in conjunction with high-speed ADC, when the nuclear signal pulse amplitude surpasses threshold value, under the control of sampling pulse, signal is carried out continuous coverage, and the data that record are done first smooth filtering, calculate peak value of pulse information by certain algorithm again.When the single core signal pulse was carried out amplitude measurement, the ADC conversion times was more, more can overcome the uncertainty of peak value measurement.This just requires controller that enough processing speeds are arranged, and ADC has enough fast slewing rate, usually adopts FPGA in conjunction with the high-speed ADC technical scheme.This design proposal is more flexible, accurate than analog MCA, reliable, but its system is complicated, and power consumption is larger, is not suitable for the low-power consumption miniaturization demand of portable nuclear spectrum measurement.The analogue type peak detection circuit is then simpler, and only when pulse signal arrived, peak detection circuit was given the peak time information of appearing, and starts the ADC conversion.Difficult point is the design that obtaining of peak information and peak signal sampling keep.
The utlity model has low in energy consumption, the characteristics such as volume is little, the dead time is little and cost is low, preferably Energy linearity, energy resolution and higher counting rate are arranged.In conjunction with C8051F340 microprocessor high performance characteristics and on-the-spot portable nuclear spectrum measurement requirement, can increase corresponding peripheral circuit and signal conditioning circuit at this circuit base and consist of portable nuclear spectrum measurement system.Therefore the utility model provides a kind of technological means of innovation for the low-power consumption measurement that realizes the nuclear signal pulse height.
Summary of the invention
Nuclear signal pulse height low-power consumption miniaturization is developing direction from now on.The purpose of this utility model is in portable nuclear spectrum measurement instrument, except the performance requirement that satisfies power spectrum, also want the demands such as low-power consumption, small size, low cost, utilize high-performance C8051F340 microprocessor, in conjunction with the low-power consumption peripheral circuit, adopt low-power consumption Miniaturization Design scheme, measure purpose from the low-power consumption that realizes the nuclear signal pulse height.The utility model institute supplying method is reasonable, and theoretical foundation is abundant, the technical scheme mature and feasible of realization.
For reaching the foregoing invention purpose, the technical scheme that adopts is specifically to comprise: tested nuclear pulse signal, signal conditioning circuit, mistake peak testing circuit, threshold value discriminator circuit, peak holding circuit, control circuit, peak value conversion ADC and peak-data processing unit; Tested nuclear pulse signal is connected with the signal conditioning circuit input end, tested nuclear pulse signal by after the signal conditioning circuit conditioning respectively with discriminator circuit and cross the peak testing circuit and be connected, carry out threshold value by the threshold value discriminator circuit and screened threshold signal and be connected with control circuit respectively by crossing the peak-to-peak signal of crossing that the peak testing circuit carried out detecting at the peak; The control circuit output terminal links to each other with peak value conversion ADC with peak holding circuit, and for peak holding circuit provides the retentive control signal, ADC provides the startup switching signal for the peak value conversion; Peak value conversion ADC output is connected with the peak-data processing unit, and the peak-data processing unit connects again control circuit; So device all adopt low energy-consumption electronic device.
A kind of low-power consumption nuclear signal pulse height analyzer that provides according to the utility model, it is characterized in that: the described peak testing circuit of crossing is by crossing peak Sampling network (R4, R5, R6, R7, C2, C4) and cross peak trigger comparator U3B and consist of, the U3B positive-negative input end respectively with peak value Sampling network output terminal M+, M-links to each other, the U3B output terminal links to each other with the CLK input end of d type flip flop U4B.
A kind of low-power consumption nuclear signal pulse height analyzer that provides according to the utility model, it is characterized in that: described threshold value discriminator circuit is by threshold value setting resistor network (R2, R3) and cross threshold trigger comparator U3A and consist of, isolate with peak detection circuit by signal follower U2A; The U3A positive-negative input end respectively with the conditioning after the nuclear pulse signal link to each other with the threshold value setting resistor network, output terminal OUTA links to each other with the CLK input end of d type flip flop U4A.
A kind of low-power consumption nuclear signal pulse height analyzer that provides according to the utility model, it is characterized in that: described peak holding circuit keeps capacitor C 1 and pressure release analog switch U1B to consist of by CBB, is connected with peak value conversion ADC by voltage follower U2B and protection stabilivolt D1; Analog switch U1B control end links to each other with d type flip flop U4A output terminal Q.
A kind of low-power consumption nuclear signal pulse height analyzer according to the utility model provides is characterized in that: described control circuit is made of d type flip flop U4A and U4B, analog switch U1A and control level pull-up resistor R1; The PRE of d type flip flop and the state of U4A arrange end D and connect pull-up resistor R1, are arranged to draw level VCC by it; The CLR zero clearing control end of d type flip flop is connected with the microprocessor of peak-data processing unit; The output terminal of d type flip flop U4A arranges input end D with the state of d type flip flop U4B and links to each other; The control end of U1A is connected with the output terminal Q of d type flip flop U4B.
A kind of low-power consumption nuclear signal pulse height analyzer according to the utility model provides is characterized in that: described peak value conversion ADC and peak-data processing unit adopt the C8051F340 microprocessor to design as acp chip; Peak value conversion ADC starts control end and links to each other with d type flip flop U4B output terminal Q.
Description of drawings
Accompanying drawing 1 is a kind of low-power consumption nuclear signal pulse height analyzer system pie graph;
Accompanying drawing 2 is a kind of low-power consumption nuclear signal pulse height analyzer peak detection circuit schematic diagram;
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Fig. 1 is a kind of low-power consumption nuclear signal pulse height analyzer system pie graph.As shown in the figure, specifically comprise: tested nuclear pulse signal, signal conditioning circuit, mistake peak testing circuit, threshold value discriminator circuit, peak holding circuit, control circuit, peak value conversion ADC and peak-data processing unit; Tested nuclear pulse signal is connected with the signal conditioning circuit input end, tested nuclear pulse signal by after the signal conditioning circuit conditioning respectively with discriminator circuit and cross the peak testing circuit and be connected, carry out threshold value by the threshold value discriminator circuit and screened threshold signal and be connected with control circuit respectively by crossing the peak-to-peak signal of crossing that the peak testing circuit carried out detecting at the peak; The control circuit output terminal links to each other with peak value conversion ADC with peak holding circuit, and for peak holding circuit provides the retentive control signal, ADC provides the startup switching signal for the peak value conversion; Peak value conversion ADC output is connected with the peak-data processing unit; So device all adopt low energy-consumption electronic device.
Fig. 2 is a kind of low-power consumption nuclear signal pulse height analyzer peak detection circuit schematic diagram.As shown in the figure, cross the peak testing circuit by crossing peak Sampling network (R4, R5, R6, R7, C2, C4) and cross peak trigger comparator U3B formation, the U3B positive-negative input end respectively with peak value Sampling network output terminal M+, M-links to each other, the U3B output terminal links to each other with the CLK input end of d type flip flop U4B.
The threshold value discriminator circuit is by threshold value setting resistor network (R2, R3) and cross threshold trigger comparator U3A formation, by signal follower U2A and peak detection circuit isolation; The U3A positive-negative input end respectively with the conditioning after the nuclear pulse signal link to each other with the threshold value setting resistor network, output terminal OUTA links to each other with the CLK input end of d type flip flop U4A.
Peak holding circuit keeps capacitor C 1 and pressure release analog switch U1B to consist of by CBB, is connected with peak value conversion ADC by voltage follower U2B and protection stabilivolt D1; Analog switch U1B control end links to each other with d type flip flop U4A output terminal Q.
Control circuit is made of d type flip flop U4A and U4B, analog switch U1A and control level pull-up resistor R1; The PRE of d type flip flop and the state of U4A arrange end D and connect pull-up resistor R1, are arranged to draw level VCC by it; The CLR zero clearing control end of d type flip flop is connected with the microprocessor of peak-data processing unit; The output terminal of d type flip flop U4A arranges input end D with the state of d type flip flop U4B and links to each other; The control end of U1A is connected with the output terminal Q of d type flip flop U4B.
Peak value conversion ADC and peak-data processing unit adopt the C8051F340 microprocessor to design as acp chip; Peak value conversion ADC starts control end and links to each other with d type flip flop U4B output terminal Q.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these various improvements and modifications that do not need creative work just can make also should be considered as protection domain of the present utility model.
Claims (6)
1. a low-power consumption nuclear signal pulse height analyzer is characterized in that: specifically comprise tested nuclear pulse signal, signal conditioning circuit, mistake peak testing circuit, threshold value discriminator circuit, peak holding circuit, control circuit, peak value conversion ADC and peak-data processing unit; Tested nuclear pulse signal is connected with the signal conditioning circuit input end, tested nuclear pulse signal by after the signal conditioning circuit conditioning respectively with discriminator circuit and cross the peak testing circuit and be connected, cross threshold signal and be connected with control circuit respectively by crossing the peak-to-peak signal of crossing that the peak testing circuit detects by what the threshold value discriminator circuit was screened; The control circuit output terminal links to each other with peak value conversion ADC with peak holding circuit, and for peak holding circuit provides the retentive control signal, ADC provides the startup switching signal for the peak value conversion; Peak value conversion ADC output is connected with the peak-data processing unit, and the peak-data processing unit connects again control circuit; So device all adopt low energy-consumption electronic device.
2. a kind of low-power consumption nuclear signal pulse height analyzer according to claim 1, it is characterized in that: the described peak testing circuit of crossing is by crossing peak Sampling network R4, R5, R6, R7, C2, C4 and mistake peak trigger comparator U3B consist of, the U3B positive-negative input end respectively with peak value Sampling network output terminal M+, M-links to each other, the U3B output terminal links to each other with the CLK input end of d type flip flop U4B.
3. a kind of low-power consumption nuclear signal pulse height analyzer according to claim 1, it is characterized in that: described threshold value discriminator circuit is by threshold value setting resistor network R2, R3 and mistake threshold trigger comparator U3A consist of, by signal follower U2A and peak detection circuit isolation; The U3A positive-negative input end respectively with the conditioning after the nuclear pulse signal link to each other with the threshold value setting resistor network, output terminal OUTA links to each other with the CLK input end of d type flip flop U4A.
4. a kind of low-power consumption nuclear signal pulse height analyzer according to claim 1, it is characterized in that: described peak holding circuit keeps capacitor C 1 and pressure release analog switch U1B to consist of by CBB, is connected with peak value conversion ADC by voltage follower U2B and protection stabilivolt D1; Analog switch U1B control end links to each other with d type flip flop U4A output terminal Q.
5. a kind of low-power consumption nuclear signal pulse height analyzer according to claim 1 is characterized in that: described control circuit is made of d type flip flop U4A and U4B, analog switch U1A and control level pull-up resistor R1; The PRE of d type flip flop and the state of U4A arrange end D and connect pull-up resistor R1, are arranged to draw level VCC by it; The CLR zero clearing control end of d type flip flop is connected with the microprocessor of peak-data processing unit; The output terminal of d type flip flop U4A arranges input end D with the state of d type flip flop U4B and links to each other; The control end of U1A is connected with the output terminal Q of d type flip flop U4B.
6. a kind of low-power consumption nuclear signal pulse height analyzer according to claim 1 is characterized in that: described peak value conversion ADC and peak-data processing unit adopt the C8051F340 microprocessor to design as acp chip; Peak value conversion ADC starts control end and links to each other with d type flip flop U4B output terminal Q.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556597 CN202904029U (en) | 2012-10-29 | 2012-10-29 | Low-power nuclear signal pulse amplitude analyzer |
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| CN 201220556597 CN202904029U (en) | 2012-10-29 | 2012-10-29 | Low-power nuclear signal pulse amplitude analyzer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300941A (en) * | 2014-09-23 | 2015-01-21 | 中国船舶重工集团公司第七一九研究所 | Nuclear impulse processing circuit |
| CN104483557A (en) * | 2014-12-24 | 2015-04-01 | 中国科学技术大学 | Pulse amplitude measurement circuit and method capable of reducing counting losses |
| CN105676263A (en) * | 2016-02-02 | 2016-06-15 | 华中科技大学 | Pulse signal peak detection method based on phase compensation |
| CN114089036A (en) * | 2021-11-09 | 2022-02-25 | 许继集团有限公司 | Key phase pulse intelligent acquisition device and acquisition method thereof |
-
2012
- 2012-10-29 CN CN 201220556597 patent/CN202904029U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300941A (en) * | 2014-09-23 | 2015-01-21 | 中国船舶重工集团公司第七一九研究所 | Nuclear impulse processing circuit |
| CN104483557A (en) * | 2014-12-24 | 2015-04-01 | 中国科学技术大学 | Pulse amplitude measurement circuit and method capable of reducing counting losses |
| CN105676263A (en) * | 2016-02-02 | 2016-06-15 | 华中科技大学 | Pulse signal peak detection method based on phase compensation |
| CN105676263B (en) * | 2016-02-02 | 2018-07-03 | 华中科技大学 | A kind of pulse signal peak-value detection method based on phase compensation |
| CN114089036A (en) * | 2021-11-09 | 2022-02-25 | 许继集团有限公司 | Key phase pulse intelligent acquisition device and acquisition method thereof |
| CN114089036B (en) * | 2021-11-09 | 2024-04-16 | 许继集团有限公司 | Key phase pulse intelligent acquisition device and acquisition method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20131029 |