CN107329164A - The G M count pipe pulse signal detection circuits of sampling pulse width can be limited - Google Patents
The G M count pipe pulse signal detection circuits of sampling pulse width can be limited Download PDFInfo
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- CN107329164A CN107329164A CN201710702104.0A CN201710702104A CN107329164A CN 107329164 A CN107329164 A CN 107329164A CN 201710702104 A CN201710702104 A CN 201710702104A CN 107329164 A CN107329164 A CN 107329164A
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- 238000005070 sampling Methods 0.000 title claims abstract description 80
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 230000005611 electricity Effects 0.000 claims description 6
- 210000001367 artery Anatomy 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 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
- G01T1/18—Measuring radiation intensity with counting-tube arrangements, e.g. with Geiger counters
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- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention provides a kind of G M count pipe pulse signal detection circuits for limiting sampling pulse width, belong to G M count pipe pulse signal detections field, with solve in the prior art due to pulse amplitude is inconsistent and successive pulse signals between overlapped, the problem of causing to be difficult to reach G M counts pipe institute nominal peak count rate by the G M count pipe pulse signal detection circuits based on threshold value comparison method.Including high pressure source module, G M counts tube module, sampling module and diverter module；High pressure source module is connected with G M count tube modules, and high pressure source module is used to provide the voltage needed for the work of G M counts tube module, and G M counts tube module is used to produce pulse signal；Sampling module is connected with G M count tube modules, and sampling module is used to be sampled the pulse signal that G M counts tube module is produced；Diverter module is connected with sampling module, and the electric current that diverter module is used for the pulse signal gathered to sampling module is shunted, and reduces the width of the pulse signal of sampling module collection.
Description
Technical field
The present invention relates to G-M counting tube pulse signal detection technical fields, more particularly to can to limit sampling pulse wide for one kind
The G-M counting tube pulse signal detection circuits of degree.
Background technology
G-M counting tubes (Geiger counter tube) are a kind of radiation detectors, due to simple in construction, impedance it is high, output letter
The advantages of number amplitude is big, signal to noise ratio is high, therefore be widely applied.In G-M counting tube pulse signal detection circuits, there is threshold
It is worth two kinds of pulse signal detection methods of comparison method and the differential method.G-M counting tubes pulse signal detection electricity based on threshold value comparison method
Road typically uses fixed threshold comparison method, and the pulse signal being sampled to is compared by it with default threshold level, works as pulse
Signal amplitude is considered an actual signal when reaching threshold level, otherwise it is assumed that being interference signal.In theory, G-M counting tubes
Peak count rate be its dead time inverse, but because within the recovery time of G-M counting tubes, pulse amplitude is inconsistent
And it is overlapped between successive pulse signals, cause the G-M counting tubes pulse signal detection circuit based on threshold value comparison method difficult
To reach peak count rate that G-M counting tubes are nominal.
The content of the invention
Present invention aim to address in the prior art due to pulse amplitude is inconsistent and successive pulse signals it
Between it is overlapped, cause to be difficult to reach G-M counting tubes by the G-M counting tube pulse signal detection circuits based on threshold value comparison method
The technical problem of nominal peak count rate there is provided a kind of G-M counting tube pulse signal detections for limiting sampling pulse width
Circuit.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of G-M counting tube pulse signal detection circuits for limiting sampling pulse width, including high pressure source module, G-M
Count tube module, sampling module and diverter module；
The high pressure source module counts tube module with G-M and is connected, and the high pressure source module is used to provide G-M counting pipe dies
Voltage needed for block work, the G-M, which counts tube module, to be used to produce pulse signal；
The sampling module counts tube module with G-M and is connected, and the sampling module is used to count G-M tube module generation
Pulse signal be sampled；
The diverter module is connected with sampling module, and the diverter module is used for the pulse signal to sampling module sampling
Electric current shunted, make sampling module sample pulse signal width reduce.
Alternatively, the G-M, which counts tube module, includes G-M counting tubes GM1 and anode resistance RA, and the sampling module includes
The threshold comparator U1 of sample resistance Rs and open-drain or open collector, the diverter module includes shunt resistance Rq, institute
Stating high pressure source module includes positive high voltage source+HV；One end of the anode resistance RA is connected with positive high voltage source+HV, anode resistance RA
The other end be connected with G-M counting tubes GM1 anode；Sample resistance Rs sampling end is connected with G-M counting tubes GM1 negative electrode,
Sample resistance Rs other end ground connection；Threshold comparator U1 in-phase input end is used to input threshold level, threshold comparator U1
Inverting input be connected with sample resistance Rs sampling end, threshold comparator U1 power end and ground terminal respectively with its electricity of powering
Source and ground are connected；Shunt resistance Rq one end is connected with threshold comparator U1 output end, and the shunt resistance Rq other end is with taking
Sample resistance Rs sampling end connection.
Alternatively, the G-M, which counts tube module, includes G-M counting tubes GM1 and anode resistance RA, and the sampling module includes
The threshold comparator U1 of sample resistance Rs and open-drain or open collector, the diverter module includes shunt resistance Rq, institute
Stating high pressure source module includes negative high voltage source-HV；The negative electrode of the G-M counting tubes GM1 is connected with negative high voltage source-HV, G-M counting tubes
GM1 anode is connected with anode resistance RA one end, and the anode resistance RA other end is connected with sample resistance Rs sampling end, is taken
Sample resistance Rs other end ground connection；Threshold comparator U1 inverting input is used to input threshold level, threshold comparator U1's
In-phase input end is connected with sample resistance Rs sampling end, threshold comparator U1 power end and ground terminal respectively with its power supply
With ground connection；Shunt resistance Rq one end is connected with threshold comparator U1 output end, the shunt resistance Rq other end and sampling
Resistance Rs sampling end connection.
The beneficial effects of the invention are as follows：
By setting diverter module to be shunted come the electric current of the pulse signal sampled to sampling module, take sampling module
The width for the pulse signal that sample is arrived reduces, and realizes after sampling module is sampled to pulse signal, by the width on edge after pulse signal
Degree reduces, so as to avoid overlapping phenomenon occur between successive pulse signals causing G-M counting tube counting losses, it is ensured that G-M is counted
Each pulse signal that number pipe is produced can be detected by follow-up pulse-detecting circuit, so as to ensure to be based on threshold value ratio
G-M counting tubes pulse signal detection circuit compared with method can reach the nominal peak count rate of G-M counting tubes institute.Therefore, with background
Technology is compared, the present invention can reach G-M counting tubes institute nominally peak count rate advantage.
Brief description of the drawings
Fig. 1 is the composition frame chart of the present invention.
Fig. 2 is a kind of Fig. 1 circuit composition schematic diagram.
Fig. 3 is Fig. 1 another circuit composition schematic diagram.
Embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
As shown in figure 1, the G-M counting tube pulse signal detection circuit bags for limiting sampling pulse width in the present embodiment
Include high pressure source module, G-M and count tube module, sampling module and diverter module；The high pressure source module counts tube module with G-M and connected
Connect, and the high pressure source module is used to provide the voltage needed for G-M counting tube module work, the G-M, which counts tube module, to be used for
Produce pulse signal；The sampling module counts tube module with G-M and is connected, and the sampling module is used to count pipe die to G-M
The pulse signal that block is produced is sampled；The diverter module is connected with sampling module, and the diverter module is used for sampling
The electric current of the pulse signal of module sampling is shunted, and reduces the width of the pulse signal of sampling module sampling.
Wherein, high pressure source module can provide positive voltage, can also provide negative voltage, and the voltage that high pressure source module is provided
Depending on size of the size according to needed for G-M counts tube module work, the present embodiment is not construed as limiting.
Alternatively, as shown in Fig. 2 in this embodiment, the G-M, which counts tube module, includes G-M counting tubes GM1 and anode
Resistance RA, the sampling module includes the threshold comparator U1 of sample resistance Rs and open-drain or open collector, described point
Flow module includes shunt resistance Rq, and the high pressure source module includes positive high voltage source+HV；One end of the anode resistance RA and positive height
Potential source+HV connections, the anode resistance RA other end is connected with G-M counting tubes GM1 anode；Sample resistance Rs sampling end and G-
M count pipe GM1 negative electrode connection, sample resistance Rs other end ground connection；Threshold comparator U1 in-phase input end is used to input
Threshold level, threshold comparator U1 inverting input is connected with sample resistance Rs sampling end, threshold comparator U1 power supply
End and ground terminal respectively with its power supply and be connected；Shunt resistance Rq one end is connected with threshold comparator U1 output end,
The shunt resistance Rq other end is connected with sample resistance Rs sampling end.
Wherein, the size of threshold level can be arranged as required to, for example, threshold level could be arranged to maximum impulse letter
The 10% of number amplitude.The voltage swing that threshold comparator U1 power supply is provided can also be according to threshold comparator U1 model
Depending on, the present embodiment is also not especially limited to this.
In the G-M counting tube pulse signal detection circuits for limiting sampling pulse width shown in Fig. 2, sampling module can use
Sample is to positive pulse.In this embodiment, when ionic discharge does not occur for G-M counting tubes GM1, anode resistance RA, G-M counting tube
The circuit that GM1 and sample resistance Rs is constituted does not have electric current to pass through, and the sampling voltage at sample resistance Rs two ends is 0, threshold comparator
The voltage of U1 reverse input ends is less than the voltage of its input in the same direction, and high-impedance state, shunting is presented in threshold comparator U1 output end
Resistance Rq does not influence sample resistance Rs, sample resistance Rs to be sampled to the pulse signal being likely to occur alone equivalent to disconnection.
After ionic discharge occurs for G-M counting tubes GM1, current impulse produces a voltage pulse on sample resistance Rs, and threshold value compares
The voltage of device U1 reverse input ends is higher than the voltage of its in-phase input end, and threshold comparator U1 output end output low level is divided
Leakage resistance Rq can be considered in parallel with sample resistance Rs, and shunt resistance Rq is shunted to sample resistance Rs electric current.Due to flowing through
Shunt resistance Rq electric current is inversely proportional with flowing through sample resistance Rs electric current with the resistance of the two, therefore, reasonable selection shunting electricity
Resistance Rq resistance can be such that the amplitude for the pulse signal being sampled to declines rapidly, to shorten the width for the pulse signal being sampled to, keep away
Exempt from the successive pulse signals that sampling module is sampled to overlapping, also the pulse signal of different amplitudes can be sampled as amplitude essentially identical
Pulse signal so that all pulse signals that G-M counting tubes GM1 is produced, no matter amplitude size, whether overlapping, can be by
The G-M counting tube pulse signal detection circuits that sampling pulse width can be limited are detected, it is to avoid counting loss leads to not reach G-M
The nominal peak count rate of counting tube, expands the usable measurement range of G-M counting tubes.
For example, if the amplitude for the maximum impulse signal that sample resistance Rs can be got is 10V, threshold level is set to
1V, then effective arteries and veins signal punching that the G-M counting tubes pulse signal detection circuit of sampling pulse width can be sampled can be limited
The amplitude range of signal is 1-10V.If shunt resistance Rq resistance is identical with sample resistance Rs resistance, then shunt resistance
After Rq accesses, the maximum impulse signal amplitude being sampled to is changed into 5V, and the amplitude range of effective impulse signal is 1-5V, have compressed arteries and veins
Rush the amplitude distribution scope of signal.If shunt resistance Rq resistance is 1/10th of sample resistance Rs resistances, sampling electricity
The amplitude for the maximum impulse signal that resistance Rs can be got is 1V, and all pulse signals are all sampled as the pulse that amplitude is 1V
Signal.
Alternatively, as shown in figure 3, in this embodiment, the G-M, which counts tube module, includes G-M counting tubes GM1 and anode
Resistance RA, the sampling module includes the threshold comparator U1 of sample resistance Rs and open-drain or open collector, described point
Flow module includes shunt resistance Rq, and the high pressure source module includes negative high voltage source-HV；The negative electrode of the G-M counting tubes GM1 is with bearing
High-voltage power supply-HV connections, G-M counting tubes GM1 anode is connected with anode resistance RA one end, and the anode resistance RA other end is with taking
Sample resistance Rs sampling end connection, sample resistance Rs other end ground connection；Threshold comparator U1 inverting input is used to input
Threshold level, threshold comparator U1 in-phase input end is connected with sample resistance Rs sampling end, threshold comparator U1 power supply
End and ground terminal respectively with its power supply and be connected；Shunt resistance Rq one end is connected with threshold comparator U1 output end,
The shunt resistance Rq other end is connected with sample resistance Rs sampling end.
In the G-M counting tube pulse signal detection circuits for limiting sampling pulse width shown in Fig. 3, sampling module can use
Sample is to negative pulse.In this embodiment, when ionic discharge does not occur for G-M counting tubes GM1, G-M counting tubes GM1, anode resistance
The circuit that RA and sample resistance Rs is constituted does not have electric current to pass through, and the sampling voltage at sample resistance Rs two ends is 0, threshold comparator U1
The voltage of reverse input end is less than the voltage of its input in the same direction, and high-impedance state, shunting electricity is presented in threshold comparator U1 output end
Rq is hindered equivalent to disconnection, does not influence sample resistance Rs, sample resistance Rs to be sampled to the pulse signal being likely to occur alone.When
G-M counting tubes GM1 occurs after ionic discharge, and current impulse produces a voltage pulse, threshold comparator on sample resistance Rs
The voltage of U1 reverse input ends is higher than the voltage of its in-phase input end, threshold comparator U1 output end output low level, shunting
Resistance Rq can be considered in parallel with sample resistance Rs, and shunt resistance Rq is shunted to sample resistance Rs electric current.Due to flowing through point
Leakage resistance Rq electric current is inversely proportional with flowing through sample resistance Rs electric current with the resistance of the two, therefore, reasonable selection shunt resistance
Rq resistance can be such that the amplitude for the pulse signal being sampled to declines rapidly, to shorten the width for the pulse signal being sampled to, it is to avoid
The successive pulse signals that sampling module is sampled to are overlapping, and it is essentially identical also the pulse signal of different amplitudes can be sampled as into amplitude
Pulse signal so that all pulse signals that G-M counting tubes GM1 is produced, no matter amplitude size, whether overlapping, can be by can
The G-M counting tube pulse signal detection circuits of limitation sampling pulse width are detected, it is to avoid counting loss leads to not reach that G-M is counted
The nominal peak count rate of number pipe, expands the usable measurement range of G-M counting tubes.
To sum up, in the G-M counting tube pulse signal detection circuits for limiting sampling pulse width shown in Fig. 2 and Fig. 3, lead to
Crossing setting diverter module includes shunt resistance Rq, has realized in the parallel connection of sample resistance Rs two ends one only according to G-M counting tubes
The shunt resistance the Rq whether Determines of GM1 sample-pulse signals access.When pulse signal does not occur, shunt resistance Rq breaks
Open, pulse signals are sampled sample resistance Rs alone, when pulse signal arrives, the forward position of pulse signal is in sample resistance
The voltage drop produced on Rs makes shunt resistance Rq in parallel with sample resistance Rs by subsequent conditioning circuit, the result of shunt resistance Rq accesses
So that not only avoid overlapping phenomenon occur between successive pulse signals along rapid abatement after the pulse signal being sampled to, and
Pulse amplitude distribution can be reduced, so that each pulse signal that G-M counting tubes are produced can be follow-up
Pulse-detecting circuit detect.The present invention can both catch the forward position of pulse signal, and the width of chopped pulse signal well
Degree, can limit pulse amplitude again.Therefore, compared with prior art, the present invention has circuit structure design exquisite, will not
Because the advantages of pulse signal is overlapping and amplitude reduction causes counting loss and can reach the peak count rate of G-M counting tubes.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the invention is not limited in this.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (3)
1. a kind of G-M counting tube pulse signal detection circuits for limiting sampling pulse width, it is characterised in that including high-voltage power supply
Module, G-M count tube module, sampling module and diverter module；
The high pressure source module counts tube module with G-M and is connected, and the high pressure source module is used to provide G-M counting tube module works
Voltage needed for making, the G-M, which counts tube module, to be used to produce pulse signal；
The sampling module counts tube module with G-M and is connected, and the sampling module is used to count G-M in the arteries and veins that tube module is produced
Signal is rushed to be sampled；
The diverter module is connected with sampling module, and the diverter module is used for the electricity of the pulse signal to sampling module sampling
Stream is shunted, and reduces the width of the pulse signal of sampling module sampling.
2. the G-M counting tube pulse signal detection circuits according to claim 1 for limiting sampling pulse width, its feature
It is, the G-M, which counts tube module, includes G-M counting tubes GM1 and anode resistance RA, the sampling module includes sample resistance Rs
With open-drain or the threshold comparator U1 of open collector, the diverter module includes shunt resistance Rq, the high-voltage power supply mould
Block includes positive high voltage source+HV；
One end of the anode resistance RA is connected with positive high voltage source+HV, and the anode resistance RA other end is with G-M counting tubes GM1's
Anode is connected；Sample resistance Rs sampling end is connected with G-M counting tubes GM1 negative electrode, sample resistance Rs other end ground connection；Threshold
Value comparator U1 in-phase input end is used to input threshold level, and threshold comparator U1 inverting input is with sample resistance Rs's
Sampling end is connected, threshold comparator U1 power end and ground terminal respectively with its power supply and be connected；The one of shunt resistance Rq
End is connected with threshold comparator U1 output end, and the shunt resistance Rq other end is connected with sample resistance Rs sampling end.
3. the G-M counting tube pulse signal detection circuits according to claim 1 for limiting sampling pulse width, its feature
It is, the G-M, which counts tube module, includes G-M counting tubes GM1 and anode resistance RA, the sampling module includes sample resistance Rs
With open-drain or the threshold comparator U1 of open collector, the diverter module includes shunt resistance Rq, the high-voltage power supply mould
Block includes negative high voltage source-HV；
The negative electrode of the G-M counting tubes GM1 is connected with negative high voltage source-HV, and G-M counting tubes GM1 anode is with anode resistance RA's
One end is connected, and the anode resistance RA other end is connected with sample resistance Rs sampling end, sample resistance Rs other end ground connection；Threshold
Value comparator U1 inverting input is used to input threshold level, and threshold comparator U1 in-phase input end is with sample resistance Rs's
Sampling end is connected, threshold comparator U1 power end and ground terminal respectively with its power supply and be connected；The one of shunt resistance Rq
End is connected with threshold comparator U1 output end, and the shunt resistance Rq other end is connected with sample resistance Rs sampling end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710702104.0A CN107329164A (en) | 2017-08-16 | 2017-08-16 | The G M count pipe pulse signal detection circuits of sampling pulse width can be limited |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710702104.0A CN107329164A (en) | 2017-08-16 | 2017-08-16 | The G M count pipe pulse signal detection circuits of sampling pulse width can be limited |
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| CN107329164A true CN107329164A (en) | 2017-11-07 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201315479Y (en) * | 2008-11-17 | 2009-09-23 | 河北实华科技有限公司 | Pulse by pulse overcurrent shutoff protective circuit |
| CN102291104A (en) * | 2011-06-09 | 2011-12-21 | 电子科技大学 | High-power pulse current/voltage generating circuit |
| CN202837556U (en) * | 2012-11-09 | 2013-03-27 | 广东工业大学 | Nuclear radiation detecting device based on Geiger-Miller counter |
| CN203191436U (en) * | 2013-01-05 | 2013-09-11 | 北京科诺伟业科技有限公司 | Over-current detection circuit applied on wind power generation current transformer |
| CN105241591A (en) * | 2015-10-30 | 2016-01-13 | 湖北航天技术研究院总体设计所 | Adjustable retardation pressure alarm device |
| CN106788354A (en) * | 2016-12-23 | 2017-05-31 | 长沙景美集成电路设计有限公司 | A kind of programmable hysteresis comparator of sluggish width |
| CN207198339U (en) * | 2017-08-16 | 2018-04-06 | 山西中辐核仪器有限责任公司 | The G M count pipe pulse signal detection circuits of sampling pulse width can be limited |
-
2017
- 2017-08-16 CN CN201710702104.0A patent/CN107329164A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201315479Y (en) * | 2008-11-17 | 2009-09-23 | 河北实华科技有限公司 | Pulse by pulse overcurrent shutoff protective circuit |
| CN102291104A (en) * | 2011-06-09 | 2011-12-21 | 电子科技大学 | High-power pulse current/voltage generating circuit |
| CN202837556U (en) * | 2012-11-09 | 2013-03-27 | 广东工业大学 | Nuclear radiation detecting device based on Geiger-Miller counter |
| CN203191436U (en) * | 2013-01-05 | 2013-09-11 | 北京科诺伟业科技有限公司 | Over-current detection circuit applied on wind power generation current transformer |
| CN105241591A (en) * | 2015-10-30 | 2016-01-13 | 湖北航天技术研究院总体设计所 | Adjustable retardation pressure alarm device |
| CN106788354A (en) * | 2016-12-23 | 2017-05-31 | 长沙景美集成电路设计有限公司 | A kind of programmable hysteresis comparator of sluggish width |
| CN207198339U (en) * | 2017-08-16 | 2018-04-06 | 山西中辐核仪器有限责任公司 | The G M count pipe pulse signal detection circuits of sampling pulse width can be limited |
Non-Patent Citations (1)
| Title |
|---|
| 佚名: "建立比较器的外部滞回电压", 《HTTPS://WWW.ELECFANS.COM/NEWS/POWER/2009050756701.HTML》 * |
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