CN207051495U - High range ray rapid measurement device - Google Patents
High range ray rapid measurement device Download PDFInfo
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- CN207051495U CN207051495U CN201720875353.5U CN201720875353U CN207051495U CN 207051495 U CN207051495 U CN 207051495U CN 201720875353 U CN201720875353 U CN 201720875353U CN 207051495 U CN207051495 U CN 207051495U
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- measurement device
- ray
- operational amplifier
- high range
- rapid measurement
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Abstract
The utility model discloses a kind of high range ray rapid measurement device, the measurement apparatus has a main detector, an amplifier unit, an AD conversion unit and the control unit for being sequentially connected in series electrical connection, the main detector has a plastic scintillant, and the main detector has at least one to be close to fixed energy compensating piece with the ray incidence end of the plastic scintillant；The energy compensating piece has substrate body made of a use acrylic light-guide material, and a use zinc sulphide is sprayed on the external coating of the substrate body outer surface.It is more that high range ray rapid measurement device of the present utility model provides a kind of measurement ray type, it is possible to increase the high range ray rapid measurement device of measuring range and below 100keV low energy ray energy response time.
Description
Technical field
High range ray fast measurement technique field is the utility model is related to, more particularly to a kind of high range ray is quickly surveyed
Measure device.
Background technology
At present, the X-ray machine of hospital and the X-ray machine of industrial flaw detection are all the technologies of the high dose short-time exposure used to tested
Object is imaged.Wherein, the time for exposure of X-ray machine is 20ms~5s, and energy is in below 100keV.In the prior art, big portion
Point be using Geiger Miller detector, ionization chamber detector, cesium iodide detector, semiconductor detector, Nal detector or
The detectors such as plastic scintillator detector measure to X, γ, β ray, and the time of measuring of these detectors is all in 200ms
More than, therefore can not complete to measure the fast-pulse less than 200ms at all.
As shown in figure 1, plastic scintillator detector is mainly by plastic scintillant 11, photomultiplier 13, amplifier unit 20
(voltage-sensitive operational amplifier or charge sensitive operational amplifier), AD conversion unit 30 and control unit (CPU) 40.Photoelectricity
The negative electrode of the dynode of multiplier tube 13 is connected via high-voltage resistant lead with high pressure, and anode is connected via shielding line with amplifier unit 20.
Operation principle is：After upper electricity, photon, which is got on plastic scintillant, makes scintillator light, and caused photon is again via photomultiplier
Collect and amplify generation electric signal, after pressure sensitive operational amplifier or charge sensitive operational amplifier, access modulus turns
Change unit 30 and convert analog signals into data signal, then counter of the digital data transmission to CPU 40, completion are entirely surveyed
Amount process.Wherein, plastic scintillant 11 can only measure to X, γ, β pulse ray, but can not realize to α pulse rays
Measurement.Simultaneously as the illumination mode of plastic scintillant 11 uses Compton scattering formula, if the fortune of plastic scintillator detector
Put unit 20 and individually use pressure sensitive operational amplifier, then the low energy energy response of the measuring apparatus is poor, can not meet
The requirement of vertification regulation；If the amplifier unit 20 of plastic scintillator detector individually uses charge-sensitive operational amplifier, survey
It is slow to measure the measuring speed of equipment, and measuring range can not meet to measure quick high dose pulse ray than relatively low.
Utility model content
The utility model for the ray detector of prior art has measurement, and ray type is few, measuring range is relatively low, low
Can energy response it is poor the defects of, and it is an object of the present invention to provide a kind of measurement ray type is more, it is possible to increase measuring range and
The high range ray rapid measurement device of below 100keV low energy ray energy response time.
Realizing the technical scheme of above-mentioned purpose is：
High range ray rapid measurement device of the present utility model, there is the main detector being sequentially connected in series, a fortune
Unit, an AD conversion unit and a control unit are put, the main detector has a plastic scintillant, it is characterised in that
The main detector has at least one to be close to fixed energy compensating with the ray incidence end of the plastic scintillant
Piece；
The energy compensating piece has one using substrate body made of acrylic or high light-conductive rate silica gel light-guide material, and
One is sprayed on the external coating of the substrate body outer surface using zinc sulphide.
The amplifier unit has a pressure sensitive operational amplifier electrically connected with the main detector, and one with it is described
The charge-sensitive operational amplifier that main detector is electrically connected and electrically connected with pressure sensitive operational amplifier parallel connection.
Described control unit has one and the first counter of the pressure sensitive operational amplifier mating reaction, one and institute
State the second counter of charge-sensitive operational amplifier mating reaction, and one by first counter and second counter
The frequency gated counter that is compared of frequency values.
The AD conversion unit has one to be electrically connected in series in the pressure sensitive operational amplifier and the control is single
The first analog-digital converter between member, and one be electrically connected in series in the charge-sensitive operational amplifier and described control unit it
Between the second analog-digital converter.
The main detector also has the light being electrically connected in series between the plastic scintillant and the amplifier unit
Electric multiplier tube.
The measurement apparatus has a multi-level output high voltage power supply, the multi-level output high voltage power supply and the photomultiplier transit
The negative electrode of pipe dynode electrically connects via high-voltage resistant lead, and the anode of the photomultiplier is via shielding line and the amplifier list
Member connection.
The plastic scintillant that it is 4ns die-away times that the plastic scintillant, which is,.
Positive effect of the present utility model is：
1) by the way that energy compensating piece to be close to fix with plastic scintillant, improve and low energy of the energy less than 100keV is penetrated
Heat input responds, insensitive to high-energy ray, while and can realizes measurement α particles, solves existing plastic scintillator detector
X, γ, Beta-ray defect can only be measured, cost is reduced while improves performance；
2) negative electrode of photomultiplier dynode is connected with multi-level output high voltage power supply, anode signal directly with amplifier unit
Connection, realize to simulation model collection, wherein, the multi-level output high voltage power supply being connected with the negative electrode of photomultiplier dynode can
The high-voltage value for changing multi-level output high voltage power supply is automatically controlled by CPU, improves radionetric survey range；
3) amplifier unit is provided with pressure sensitive operational amplifier and charge-sensitive operational amplifier simultaneously, is counted according to first
Device, the second counter and frequency gated counter, realize automatic switchover metering system, solve in the prior art to less than
It is slow that 200ms fast-pulse can not measure measuring speed, and measuring range than it is relatively low the problem of, wherein, sampling processing speed
Degree is that 30ns is arrived in the frequency of exposure lifting of X-ray machine；
4) measurement equipment adds expert mode function, metering can be carried out under rapid pulsation mode and traced to the source, measurement result
It is more accurate, while blue tooth communication function is added, it can complete to read data message by APP or the behaviour such as running parameter is set
Make.
Design, concrete structure and caused technique effect of the present utility model are made furtherly below with reference to accompanying drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Brief description of the drawings
Fig. 1 is the theory structure schematic diagram of existing plastic scintillator detector；
Fig. 2 is the theory structure schematic diagram of high range ray rapid measurement device of the present utility model.
Embodiment
Enumerate preferred embodiment below, and become apparent from intactly illustrating the utility model with reference to accompanying drawing.
As shown in Fig. 2 the high range ray rapid measurement device for the present embodiment.The high range ray of the present embodiment is quick
Measurement apparatus, which is sequentially connected in series, is electrically connected with main detector 10, amplifier unit 20, AD conversion unit 30, control unit 40 and multistage
Export high voltage power supply 50.In one preferred embodiment, control unit 40 is 200M high-speed CPUs.
There is main detector 10 plastic scintillant 11, at least one to be close to fixed energy compensating piece with plastic scintillant 11
12, and the photomultiplier 13 being electrically connected in series between plastic scintillant 11 and amplifier unit 20.In one embodiment, plastics dodge
The plastic scintillant that it is 4ns die-away time that bright body 11, which is,.Measurement apparatus has an energy compensating piece 12.Energy compensating piece 12 is used for
Energy compensating is carried out to plastic scintillant 11.Energy compensating piece 12 has substrate body 121 and is sprayed on the appearance of substrate body 121
The external coating 122 in face, substrate body 121 are made of acrylic light-guide material etc., and external coating 122 uses zinc sulphide etc.,.Energy
Compensating plate 12 realizes the energy response for improving low energy ray of the energy less than 100keV, insensitive to high-energy ray, while and can
Realization is measured to α particles, and X, γ, Beta-ray defect can only be measured by solving existing plastic scintillator detector.Photoelectricity times
The negative electrode for increasing the dynode of pipe 13 is connected via high-voltage resistant lead with multi-level output high voltage power supply 50, and anode is via shielding line and amplifier
Unit 20 connects.The magnitude of voltage of the multi-level output high voltage power supply 50 of the negative electrode connection of the dynode of photomultiplier 13 is by control unit
40 control to adjust, and improve radionetric survey range.
There is amplifier unit 20 the pressure sensitive computing electrically connected with the anode of the photomultiplier 13 of main detector 10 to put
Big device 21, and electrically connect with the anode of the photomultiplier 13 of main detector 10 and company in parallel with pressure sensitive operational amplifier 21
The charge-sensitive operational amplifier 22 connect.The pressure sensitive operational amplifier 21 of high bandwidth is used to gather the pulse less than 200ms
Formula ray and acquisition pulse transmitted intensity, the charge-sensitive operational amplifier 22 of high input impedance are more than or equal to for collection
200ms pulsed ray and acquisition pulse transmitted intensity.
AD conversion unit 30, which has, to be electrically connected in series between pressure sensitive operational amplifier 21 and control unit 40
First analog-digital converter 31, and the second modulus being electrically connected in series between charge-sensitive operational amplifier 22 and control unit 40
Converter 32.The different relatively threshold values of the analog-digital converter 32 of analog-digital converter 31 or second are set, respectively by Alpha-ray signal with
X, γ, Beta-ray signal be by distinguishing, while the data signal that the analog signal of input is changed into response exports, and provides
Whole measurement process is completed to control unit 40.
Control unit 40 has the first counter 41 and charge-sensitive with the mating reaction of pressure sensitive operational amplifier 21
Second counter 42 of the mating reaction of operational amplifier 22, and for by the frequency number of the first counter 41 and the second counter 42
The frequency gated counter 43 that value is compared, automatic switching range is realized according to frequency gated counter.Control unit 40 connects
The data signal that AD conversion unit 30 transmits is received, the data of measurement are calculated and exported to display.
Simultaneous measuring apparatus also add expert mode function, metering can be carried out under rapid pulsation mode and traced to the source, measurement
As a result it is more accurate, while blue tooth communication function is added, it can complete to read data message by APP or running parameter etc. is set
Operation.
The measuring method of high range ray rapid measurement device of the present utility model, including：
Step 1, the ray incidence end that energy compensating piece 12 is close to be fixed on plastic scintillant 11, electricity in measurement apparatus,
X, γ, Beta-ray particle are got on the plastic scintillant 11 of main detector 10, produce photon；
Step 2, photomultiplier 13 of the caused photon transfer to main detector 10 by photon collection and amplifies, produced
Raw electric signal；
Step 3, ray frequency is tested by the first counter 41 and the automatic decision of the second counter 42 of control unit 40
Rate, and measurement pattern is selected by frequency gated counter 43, and automatically control the negative electrode connection of the dynode of photomultiplier 13
Multi-level output high voltage power supply 50 magnitude of voltage；When the radiation frequencies of collection are less than 200ms, control unit 40 controls amplifier list
The pressure sensitive operational amplifier 21 of member 20 is acquired pulsed ray and pulse transmitted intensity；When the radiation frequencies of collection are big
When 200ms, control unit 40 controls the charge-sensitive operational amplifier 22 of amplifier unit 20 to be acquired pulsed
Ray and pulse transmitted intensity；
Step 4, by the analog signal transmission after being handled via amplifier unit 20 to AD conversion unit 30, pass through modulus
The different comparison threshold values that converting unit 30 is set, Alpha-ray signal and X, γ, Beta-ray signal are made a distinction, meanwhile,
Analog signal is changed into data signal via AD conversion unit 30, and is transferred to control unit 40.
Each preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill of this area
Personnel make many modifications and variations without creative work can according to design of the present utility model.Therefore, all this technologies
Technical staff passes through logic analysis, reasoning or limited on the basis of existing technology according to design of the present utility model in field
Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. a kind of high range ray rapid measurement device, there is a main detector, an amplifier unit, the mould being sequentially connected in series
Number converting unit and a control unit, the main detector have a plastic scintillant, it is characterised in that
The main detector has at least one to be close to fixed energy compensating piece with the ray incidence end of the plastic scintillant；
The energy compensating piece has one to use substrate body made of acrylic or high light-conductive rate silica gel light-guide material, and one adopts
The external coating of the substrate body outer surface is sprayed on zinc sulphide.
2. high range ray rapid measurement device as claimed in claim 1, it is characterised in that the amplifier unit have one with
The pressure sensitive operational amplifier of main detector electrical connection, and one electrically connect and clever with the voltage with the main detector
The charge-sensitive operational amplifier of quick operational amplifier electrical connection in parallel.
3. high range ray rapid measurement device as claimed in claim 2, it is characterised in that described control unit have one with
First counter of the pressure sensitive operational amplifier mating reaction, one and the charge-sensitive operational amplifier mating reaction
The second counter, and a frequency that the frequency values of first counter and second counter are compared selects
Counter.
4. high range ray rapid measurement device as claimed in claim 2, it is characterised in that the AD conversion unit has
One is electrically connected in series in the first analog-digital converter between the pressure sensitive operational amplifier and described control unit, and a string
Connection is connected electrically in the second analog-digital converter between the charge-sensitive operational amplifier and described control unit.
5. high range ray rapid measurement device as claimed in claim 1, it is characterised in that the main detector also has one
The photomultiplier being electrically connected in series between the plastic scintillant and the amplifier unit.
6. high range ray rapid measurement device as claimed in claim 5, it is characterised in that the measurement apparatus has more than one
The negative electrode of level output high voltage power supply, the multi-level output high voltage power supply and the photomultiplier dynode is via high-voltage resistant lead
Electrical connection, the anode of the photomultiplier are connected via shielding line with the amplifier unit.
7. high range ray rapid measurement device as claimed in claim 1, it is characterised in that the plastic scintillant is decay
Time is 4ns plastic scintillant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720875353.5U CN207051495U (en) | 2017-07-19 | 2017-07-19 | High range ray rapid measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720875353.5U CN207051495U (en) | 2017-07-19 | 2017-07-19 | High range ray rapid measurement device |
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| CN207051495U true CN207051495U (en) | 2018-02-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107153213A (en) * | 2017-07-19 | 2017-09-12 | 上海仁机仪器仪表有限公司 | High range ray rapid measurement device and its measuring method |
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2017
- 2017-07-19 CN CN201720875353.5U patent/CN207051495U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107153213A (en) * | 2017-07-19 | 2017-09-12 | 上海仁机仪器仪表有限公司 | High range ray rapid measurement device and its measuring method |
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