CN208506256U - A kind of portable radiant dosemeter and dosage monitoring equipment - Google Patents
A kind of portable radiant dosemeter and dosage monitoring equipment Download PDFInfo
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- CN208506256U CN208506256U CN201820645666.6U CN201820645666U CN208506256U CN 208506256 U CN208506256 U CN 208506256U CN 201820645666 U CN201820645666 U CN 201820645666U CN 208506256 U CN208506256 U CN 208506256U
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Abstract
The utility model relates to a kind of portable radiant dosemeter and dosage monitoring equipment, belong to radiac technical field.The portable radiant dosemeter includes: CZT detector, signal processing system, processor and shielding case made of metal.CZT detector, signal processing system and processor successively couple, and CZT detector, signal processing system and processor are all set in shielding case.Compared with prior art, since electric signal export to the CZT detector using signal processing system amplified, shape, export after Screening Treatment and pre-process to the processor, so as to amplitude, the pulsewidth etc. for changing output signal, to improve the dose linear of portable radiant dosemeter and dosage monitoring equipment, the operating voltage of the CZT detector be ensure that in the safe voltage for being down to human body, which still has higher detection efficient.
Description
Technical field
The utility model belongs to radiac technical field, and in particular to a kind of portable radiant dosemeter and agent
Traffic monitoring device.
Background technique
People are also faced with special personal safety and Environmental security etc. while utilizing nuclear energy and nuclear technology extensively and ask
Topic.Therefore, to ensure in Application of Nuclear Technology the public and around the safety of ecological environment just need the dose rate instrument pair of environment grade
The environmental radiation dose of surrounding carries out real-time monitoring.
The probe segment of main dosemeter is mainly G-M pipe and silicon diode on Vehicles Collected from Market, when dead due to G-M pipe
Between it is larger and lower to gamma-ray detection efficient, while the angular response of silicon diode is poor and it is to gamma-ray detection
The reasons such as efficiency is relatively low, so that the application of the personal dosimeter of both types is by biggish limitation.And novel CZT is partly led
The dosemeter of bulk detector can make up G-M and manage defect low with silicon diode detection efficient and big the dead time.Therefore it is based on
The dose rate instrument of CZT semiconductor detector is the ideal X of one kind, gamma dose rate instrument.
CZT semiconductor detector will realize that higher detection efficient then needs higher operating voltage, however for conduct
The personal dosimeter of household needs the operating voltage of detector to be down to the peace of human body based on feature safe and reliable, easy to carry
Full voltage.However, its detection efficient also reduces accordingly with the reduction of operating voltage of detector, therefore, how to guarantee
In the case that detector has higher detection efficient, the safe voltage that its operating voltage is down to human body is become into industry concern
Focus.
Utility model content
In consideration of it, the purpose of this utility model is to provide a kind of portable radiant dosemeter and dosage monitoring equipment, with
Effectively improve the above problem.
The embodiments of the present invention are achieved in that
The utility model embodiment provides a kind of portable radiant dosemeter, comprising: CZT detector, signal processing system
System, processor and shielding case made of metal.The CZT detector, the signal processing system, the processor coupling
It closes, the CZT detector, the signal processing system and the processor are all set in the shielding case, at the signal
Reason system is exported for amplifying, shaping to the electric signal that the CZT detector exports, after Screening Treatment to the processing
Device, the processor according to the electric signal that preset standard exports the signal processing system for pre-processing.
In the utility model preferred embodiment, the signal processing system includes: pre-amplifying module, pretreatment mould
Block and comparison module, the CZT detector, the pre-amplifying module, the preprocessing module and the comparison module are successively
Coupling；The pre-amplifying module for will receive the CZT detector output electric signal amplify processing after it is defeated
Out to the preprocessing module；The preprocessing module for the electric signal that the pre-amplifying module exports is formed,
Output is to comparison module after enhanced processing；The comparison module was used for meeting in electric signal that the preprocessing module exports
The signal of preset standard is exported to be handled to the processor.
In the utility model preferred embodiment, the pre-amplifying module includes: metal-oxide-semiconductor and the first amplifier, institute
State metal-oxide-semiconductor source electrode ground connection, the drain of the metal-oxide-semiconductor respectively with the first input end and the second input terminal of first amplifier
Coupling, the grid of the metal-oxide-semiconductor are coupled with the output end of the CZT detector and first amplifier respectively, and described first
The output end of amplifier is also coupled with the preprocessing module.
In the utility model preferred embodiment, the preprocessing module includes: differential circuit and amplifying circuit, described
Differential circuit is coupled with the pre-amplifying module and the amplifying circuit respectively, the amplifying circuit and the comparison module coupling
It closes；Output is to the amplification after the differential circuit is used to that processing for the electric signal that the pre-amplifying module exports to be formed
Circuit；Output is to comparison module after the amplifying circuit is used to amplifying the electric signal that the differential circuit exports into processing.
In the utility model preferred embodiment, the differential circuit is CR differential circuit.
In the utility model preferred embodiment, the amplifying circuit includes: the second amplifier, second amplifier
First input end coupled with the differential circuit, the second input terminal of second amplifier is coupled with its output end, described
The output end of second amplifier is coupled with the comparison module, and the second input terminal of second amplifier is also grounded.
In the utility model preferred embodiment, the comparison module includes: comparator, and the first of the comparator is defeated
Enter end to couple with reference voltage, the second input terminal of the comparator is coupled with the preprocessing module, the comparator it is defeated
Outlet is coupled with the processor.
In the utility model preferred embodiment, the shielding case is provided with communication port, the communication port and institute
State processor coupling.
In the utility model preferred embodiment, the generous size of the length of the CZT detector is less than or equal to
20mmX20mmX10mm。
The utility model embodiment additionally provides a kind of dosage monitoring equipment, comprising: controlling terminal and above-mentioned portable
Dosimeter, the controlling terminal are coupled with the processor in the portable radiant dosemeter.
Portable radiant dosemeter provided by the embodiment of the utility model and dosage monitoring equipment, compared with prior art,
Due to CZT detector atomic number with higher, thus the thickness for detecting material can achieve centimetres, to guarantee
Its outstanding detection efficient, in addition, also having the characteristics that energy resolution height, high sensitivity, small in size, light-weight.In addition,
It amplified, shaped using the electric signal that signal processing system exports the CZT detector, exported after Screening Treatment to processing
Device is handled, so as to amplitude, the pulsewidth etc. for changing output signal, to improve portable radiant dosemeter and dosage monitoring
The dose linear of equipment, ensure that the operating voltage of the CZT detector in the safe voltage for being down to human body, the portable radiant
Dosemeter still has higher detection efficient.The shielding case not only can protect CZT detector disposed within, signal processing
System and processor avoid its damage, to prolong the service life；But also can to avoid CZT detector, signal processing system and
Interference of the processor by external electromagnetic signal, to improve the accuracy of radiation dose rate.In addition, the utility model is also equipped with:
The advantages that detection efficient is good, high sensitivity, small in size, strong antijamming capability.
Other feature and advantage of the utility model will illustrate in subsequent specification, also, partly from specification
It becomes apparent, or is understood and implementing the utility model embodiment.The purpose of this utility model and other advantages can
It is achieved and obtained by specifically noted structure in written specification, claims and attached drawing.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.By the way that shown in attached drawing, the above and other purpose, feature and advantage of the utility model will more
Clearly.Identical appended drawing reference indicates identical part in all the attached drawings.Do not drawn by actual size equal proportion scaling deliberately
Attached drawing processed, it is preferred that emphasis is show the purport of the utility model.
Fig. 1 shows a kind of structural schematic diagram of portable radiant dosemeter provided by the embodiment of the utility model.
Fig. 2 shows the structural block diagrams of the signal processing system in Fig. 1 provided by the embodiment of the utility model.
Fig. 3 shows the circuit diagram of the pre-amplifying module in Fig. 2 provided by the embodiment of the utility model.
Fig. 4 shows the circuit diagram of the preprocessing module in Fig. 2 provided by the embodiment of the utility model.
Fig. 5 shows the circuit diagram of the comparison module in Fig. 2 provided by the embodiment of the utility model.
Fig. 6 shows the comparison diagram carried out before and after segment processing to radiation dose rate.
Fig. 7 shows the structural block diagram of dosage monitoring equipment provided by the embodiment of the utility model.
Icon: 10- portable radiant dosemeter；11- shielding case；13-CZT detector；15- signal processing system；
151- pre-amplifying module；152- preprocessing module；1521- differential circuit；1522- amplifying circuit；153- compares mould
Block；17- processor；20- dosage monitoring equipment；21- controlling terminal.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings or this is practical new
Type product using when the orientation or positional relationship usually put, be merely for convenience of describing the present invention and simplifying the description, and
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore
It should not be understood as limiting the present invention.In addition, term " first ", " second " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection ", " coupling " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
The utility model embodiment provides a kind of portable radiant dosemeter 10, as shown in Figure 1.The portable radiant agent
Measuring instrument 10 includes: CZT detector 13, signal processing system 15, processor 17 and shielding case 11.
The shielding case 11 is for protecting the CZT detector 13, the signal processing system 15 and processor 17, that is,
The CZT detector 13, signal processing system 15 and processor 17 are all set in the shielding case 11.The shape of the shielding case 11
Shape can there are many, for example, it may be cuboid, is also possible to cylindrical body, can also be Elliptic Cylinder etc..The shielding case 11
It is made of metal material, for example, it may be iron, aluminium, copper etc., to protect CZT detector 13, signal processing system 15 and processor
17 from external electromagnetic signal interference, to improve the accuracy of radiation dose rate.In this present embodiment, it is preferable that the screen
It covers cover 11 and is provided with communication port (not shown), which couples with the processor 17.The communication port is used for
It is communicated with external equipment, is referred in order to export the signal of detection to external equipment, and the control of reception external equipment
It enables, convenient for the processing such as update, maintenance of portable radiant dosemeter 10.Wherein, which can be USB port, can also
To be the port RS232, it can also be the communication port such as the port RJ45.
The CZT detector 13 is a kind of using detector made of CdZnTe ternary semiconductor material, due to
Cadmium-zinc-teiluride (CdZnTe) atomic number with higher, thus the thickness for detecting material can achieve centimetres, to guarantee
Its outstanding detection efficient.CZT detector 13 is a kind of novel nuclear radiation detection component, output pulse signal, and probe is not necessarily to
Refrigeration has the characteristics that energy resolution height, high sensitivity, small in size, light-weight, is mainly used for X and the survey of gamma-ray power spectrum
Amount.The CZT detector 13 can be the CZT detector 13 being often used on the market at present, for example, the type of the CZT detector 13
Number it can be DT-P01.Wherein it is preferred to which the generous size of length of the CZT detector 13 is not more than (being less than or equal to)
20mmX20mmX10mm comprising sizes, for example, 20mmX20mmX8mm, 20mmX20mmX10mm,
10mmX20mmX5mm etc., in this present embodiment, it is further preferred that the generous size of the length of the CZT detector 13 is
20mmX20mmX5mm。
The signal processing system 15 is for amplifying the electric signal that CZT detector 13 exports, filtering, shaping, sieving
The processing such as choosing, analog-to-digital conversion, to improve the dose linear of portable radiant dosemeter 10.In this present embodiment, as shown in Fig. 2,
Preferably, the signal processing system 15 includes: pre-amplifying module 151, preprocessing module 152 and comparison module 153.
The pre-amplifying module 151 is coupled with the CZT detector 13 and the preprocessing module 152 respectively, is used for
Output is to the preprocessing module 152 after the electric signal that the CZT detector 13 received exports is amplified processing.In
In the present embodiment, as shown in Figure 3, it is preferable that the pre-amplifying module 151 includes: metal-oxide-semiconductor Q1 and the first amplifier U1.Institute
The source electrode ground connection for stating metal-oxide-semiconductor Q1, it is further preferred that the source electrode of the metal-oxide-semiconductor Q1 is grounded through first resistor R1.The metal-oxide-semiconductor
The drain of Q1 is coupled with the first input end of the first amplifier U1 and the second input terminal respectively, in addition, the metal-oxide-semiconductor Q1
Drain is also connect through second resistance R2 with+5V power supply and the drain of the metal-oxide-semiconductor Q1 is also through 3rd resistor R3 and+5V power supply
Connection.The grid of the metal-oxide-semiconductor Q1 is coupled with the output end of the CZT detector 13 and the first amplifier U1 respectively, excellent
The grid of selection of land, the metal-oxide-semiconductor Q1 is connect through first capacitor C1 with the CZT detector 13；The grid of the metal-oxide-semiconductor Q1 also passes through
Second capacitor C2 is coupled with the output end of the first amplifier U1 and the grid of the metal-oxide-semiconductor Q1 is also through the 4th resistance R4 and
The output end of one amplifier U1 couples.The output end of the first amplifier U1 is also coupled with the preprocessing module 152.This
Outside, the second input terminal of the first amplifier U1 is also grounded through the 5th resistance R5.The first power end of first amplifier U1 with+
The connection of 5V power supply, second source end ground connection.
Wherein, metal-oxide-semiconductor Q1 is the input stage of amplifier, improving input impedance, and CZT detector 13 is exported
Signal amplifies.Among the above through the second capacitor C2 be feedback capacity, the 4th resistance R4 be feedback resistance, by adjusting C2,
R4 can change amplitude and pulse width.
Wherein it is preferred to which the first input end of the first amplifier U1 can be non-inverting input terminal, first amplification
The second input terminal of device U1 can be inverting input terminal.The first power end of the first amplifier U1 is with phase power end, institute
The second source end for stating the first amplifier U1 is inverting power supplies end.
Wherein, the port HV in Fig. 3 is for connecing external high pressure power supply, wherein the external high voltage power supply can be down to 20-
100V, for powering for CZT detector 13.Port 1 in Fig. 3 with preprocessing module 152 for connecting.
The preprocessing module 152 is coupled with the pre-amplifying module 151 and the comparison module 153 respectively, is used for
The electric signal that the pre-amplifying module 151 exports is filtered, is shaped, is exported after enhanced processing to comparison module 153.In
In the present embodiment, as shown in Figure 4, it is preferable that the preprocessing module 152 includes: differential circuit 1521 and amplifying circuit 1522.
The differential circuit 1521 is coupled with the pre-amplifying module 151 and the amplifying circuit 1522 respectively, Yu Ben
In embodiment, it is preferable that the differential circuit 1521 is CR differential circuit.It is further excellent as shown in the left side dotted line frame in Fig. 4
Selection of land, the differential circuit 1521 include: third capacitor C3 and the 6th resistance R6.One end of the third capacitor C3 be used for it is preposition
Amplification module 151 connects, and further, one end of the third capacitor C3 with first in pre-amplifying module 151 for putting
The output end connection of big device U1.The other end of the third capacitor C3 is grounded through the 6th resistance R6, in addition, the third capacitor C3
The other end also coupled with amplifying circuit 1522.The pulse signal exported through pre-amplifying module 151 is through the differential circuit 1521
Afterwards, become quasi- gaussian signal output, in addition, the differential circuit 1521, which can also filter out, is superimposed upon 13 output signal of CZT detector
In noise signal.
The amplifying circuit 1522 is coupled with the differential circuit 1521 and the comparison module 153 respectively, for will be through
Output is to comparison module 153 after the signal amplification that differential circuit 1521 exports.In this present embodiment, such as the right dotted line in Fig. 4
Shown in frame, it is preferable that the amplifying circuit 1522 includes: the second amplifier U2.The first input end of the second amplifier U2
Couple, further, the first input end of the second amplifier U2 and the third capacitor C3 with the differential circuit 1521
The other end connection and the second amplifier U2 first input end also through the 6th resistance R6 be grounded.In addition, described second
First input end of the first input end of amplifier U2 also through the 7th resistance R7 ground connection and the second amplifier U2 is also through the
Eight resistance R8 are connect with+5V power supply.The second input terminal of the second amplifier U2 is coupled with its output end, further preferably
Second input terminal on ground, the second amplifier U2 is connect through the 9th resistance R9 with its output end.In addition, second amplifier
The second input terminal of U2 is also grounded, it is further preferred that the second input terminal of the second amplifier U2 is also through the tenth resistance R10
It is grounded with after the 4th capacitor C4 series connection.The output end of the second amplifier U2 is coupled with the comparison module 153, further
The output end on ground, second amplifier U2 is coupled through eleventh resistor R11 with the comparison module 153.Second amplifier U2's
First power end is connect with+5V power supply, second source end ground connection.
Wherein it is preferred to which the first input end of the second amplifier U2 can be non-inverting input terminal, second amplification
The second input terminal of device U2 can be inverting input terminal.The first power end of the second amplifier U2 is with phase power end, institute
The second source end for stating the second amplifier U2 is inverting power supplies end.
Wherein for connecting with the port 1 in Fig. 3, the port 3 in Fig. 4 is used for and comparison module 153 port 2 in Fig. 4
Connection.
The comparison module 153 is coupled with the preprocessing module 152 and processor 17 respectively, is used for the pretreatment
The signal for meeting preset standard in electric signal that module 152 exports is exported to be handled to processor 17.In this present embodiment,
As shown in Figure 5, it is preferable that the comparison module 153 includes: comparator U3.The first input end of the comparator U3 and reference
Voltage coupling, it is further preferred that the first input end of the comparator U3 is connect through twelfth resistor R12 with reference voltage,
In addition, the first input end of the comparator U3 is also grounded through thirteenth resistor R13.The second input terminal of the comparator U3 with
The preprocessing module 152 couples, it is further preferred that the first input end of the comparator U3 through the 14th resistance R14 with
The preprocessing module 152 connects, in addition, the first input end of the comparator U3 is also grounded through the 15th resistance R15.It is described
Comparator U3 output end is coupled with the processor 17, it is preferable that the output end of the comparator U3 and the 16th resistance R16 connect
It is coupled after connecing with the processor 17.The first power end of the comparator U3 is connect with+5V power supply, and the of the comparator U3
Two power ends ground connection.The quasi- gaussian signal that preprocessed module 152 exports exports square-wave signal after the screening of comparison module 153.
In addition, the analog signal that the comparison module 153 is also used to receive is converted to digital signal output.
Wherein, which can set according to actual needs, in this present embodiment, it is preferable that the comparison module
The signal greater than reference voltage in 153 electric signals for exporting preprocessing module 152 exports.Wherein, pre- bidding among the above
Standard is reference voltage, can be set according to actual needs, for example, setting the reference voltage as+5V in the present embodiment.
Wherein it is preferred to the first input end of the comparator U3 can be inverting input terminal, the of the comparator U3
Two input terminals can be non-inverting input terminal.The first power end of the comparator U3 be with phase power end, the comparator U3's
Second source end is inverting power supplies end.
Wherein, for connecting with the port 3 in Fig. 4, the port 5 in Fig. 5 is used to connect with processor 17 port 4 in Fig. 5
It connects.
The processor 17 is coupled with the signal processing system 15, is used for according to preset standard to the signal processing system
The electric signal of 15 output of system is pre-processed.Preferably, 153 coupling of comparison module in the processor 17 and signal processing system 15
It closes, further, is connect with the output end of the comparator U3 in comparison module 153.Processor 17 exports comparison module 153
Signal is handled according to preset standard, to reduce the output bias of the portable radiant dosemeter 10, especially in low dosage
Output bias under rate environment.Wherein, preset standard among the above refers to manager according to actual use demand according to default threshold
Value carries out sectional calibration processing to the signal that processor 17 receives.
In order to more clearly illustrate the principle of preset standard, only illustrate with the case where two preset thresholds below
Bright, the case where remaining preset threshold, is similar therewith, no longer burdensome herein.Preferably, when processor 17 receives comparison module 153
When the signal of output, the numerical value of the signal received is judged with first threshold, if the numerical value of the signal received is less than
First threshold then obtains dosage rate y1 according to the first default calibration factor and the signal value of acquisition.If the signal received
Numerical value is more than or equal to first threshold, then obtains dosage rate y2 according to the second default calibration factor and the signal value of acquisition.Its table
It is as follows up to formula:
Wherein, a, b are the first default calibration factor, and c, d are the second default calibration factor, and y is dosage rate, and x is processor
The numerical value of 17 signals received, as portable radiant dosemeter 10 are to X, gamma-ray response data.
As shown in fig. 6, this is portable after carrying out segment processing according to preset standard to the signal that comparison module 153 exports
The output bias of dosimeter 10 becomes smaller, and especially at low dose rate, from original deviation 280%, is reduced to -12%.
Wherein, the deviation data before and after sectional calibration is as shown in table 1.
Table 1
From the data in table it is not difficult to find that after the signal progress segment processing that comparison module 153 exports, so that this is portable
The output bias of dosimeter 10 becomes smaller, the significant effect especially at low dose rate.
Wherein a, b, c, d can be as obtained by Standard Ratio field calibration, for example, the portable radiant dosemeter 10 is placed in
In the standard dose field of one threshold value section (x < 1000), the sound of 10 pairs of portable radiant dosemeter radiation under multiple groups dosage rate is tested
Data are answered, array (xi, yi) is obtained, are fitted to obtain coefficient a, b using least square line, expression formula is as follows: yi=axi
+b。
The portable radiant dosemeter 10 is placed in the standard dose field of second threshold section (x >=1000), tests multiple groups
The response data of 10 pairs of portable radiant dosemeter radiation, obtains array (xi, yi) under dosage rate, straight using least square method
Line is fitted to obtain coefficient c, d, and expression formula is as follows: yi=cxi+d.
Wherein, in order to as make calibration factor a, b, c, d accurate as possible, test multiple groups Different Dose Rates as much as possible are answered
The response data of lower 10 pairs of radiation of the portable radiant dosemeter, is not less than 3 groups under normal conditions.
Wherein, it should be appreciated that the case where illustrating only the preset standard under two preset thresholds among the above may be used also
To include the case where multiple preset thresholds, for example, the first preset value is 100, second threshold 200, third preset value is 300
Deng it is thus impossible to the case where preset standard under two preset values shown in will be above-mentioned and the reason such as the numerical value of preset threshold
Solution is at being limitations of the present invention, and no matter how the numerical value of preset threshold changes, and how many a preset thresholds of setting etc.,
As long as should be included in the protection scope of the utility model among its principle.
Wherein, above-mentioned processor 17 can be a kind of IC chip, the processing capacity with signal.Above-mentioned place
Reason device 17 can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc.；Can also be digital signal processor (Digital Signal Processing,
DSP), specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate
Array (Field Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or crystal
Pipe logical device, discrete hardware components.General processor can be microprocessor or the processor 17 be also possible to it is any often
Processor 17 of rule etc..For example, when the processor 17 selects STM32 single-chip microcontroller, universal input/output of single-chip microcontroller
The port (General Purpose Input Output, referred to as GPIO) is connect with the output end of its comparator U3.
The utility model embodiment additionally provides a kind of dosage monitoring equipment 20, as shown in Figure 7.The dosage monitoring equipment 20
It include: controlling terminal 21 and above-mentioned portable radiant dosemeter 10, the controlling terminal 21 and the portable radiant dosage
Processor 17 in instrument 10 couples.The controlling terminal 21 can be used for receiving the signal of the transmission of processor 17, the i.e. portable radiant
The dosage rate that dosemeter 10 exports.In addition, the controlling terminal 21 can also be according to actual needs in time to portable radiant
Dosemeter 10 carries out data update, program updates etc., for example, updating storage the preset standard etc. in processor 17.Wherein, on
Controlling terminal 21 in stating includes but is not limited to computer.
In conclusion the utility model embodiment provides a kind of portable radiant dosemeter and dosage monitoring equipment.It should
Portable radiant dosemeter includes: CZT detector, signal processing system, processor and shielding case.Wherein, the signal processing
System includes: pre-amplifying module, preprocessing module and comparison module.Due to CZT detector atomic number with higher,
Thus the thickness of detection material can achieve centimetres, to ensure that its outstanding detection efficient, in addition, also having energy
High resolution, high sensitivity, it is small in size, light-weight the features such as.In addition, defeated to the CZT detector using signal processing system
Electric signal out is amplified, is shaped, filtering, output is pre-processed to the processor after Screening Treatment, so as to change
Become amplitude, the pulsewidth etc. of output signal, to improve the dose linear of portable radiant dosemeter and dosage monitoring equipment.Further
Ground, the pulse signal for the CZT detector output which is used to receive export after amplifying processing
To the preprocessing module；Through the pulse signal of pre-amplifying module output after the preprocessing module, become quasi- gaussian signal
Output, in addition, the preprocessing module can also filter out the noise signal being superimposed upon in CZT detector output signal；It is preprocessed
The quasi- gaussian signal of module output exports square-wave signal after comparison module screens.In addition, using processor to the ratio received
Compared with module output signal pre-processed, ensure that the operating voltage of the CZT detector in the safe voltage for being down to human body,
The portable radiant dosemeter still has higher detection efficient, and the output of the portable radiant dosemeter can be effectively reduced
Deviation makes its output bias become smaller, especially the significant effect in low dose rate.The shielding case, which not only can protect, is placed in it
Interior CZT detector, signal processing system and processor, avoids its damage, to prolong the service life；But also it can be to avoid
The interference of CZT detector, signal processing system and processor by external electromagnetic signal, to improve the accurate of radiation dose rate
Property.In addition, the utility model is also equipped with: the advantages that detection efficient is good, high sensitivity, small in size, strong antijamming capability.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.
Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap
Containing being within the protection scope of the utility model.
Claims (10)
1. a kind of portable radiant dosemeter characterized by comprising CZT detector, signal processing system, processor and by
Shielding case made of metal material, the CZT detector, the signal processing system, processor coupling, the CZT are visited
Survey device, the signal processing system and the processor are all set in the shielding case, the signal processing system for pair
The electric signal of the CZT detector output is amplified, is shaped, exporting after Screening Treatment to the processor, the processor
Electric signal for exporting according to preset standard to the signal processing system pre-processes.
2. portable radiant dosemeter according to claim 1, which is characterized in that before the signal processing system includes:
Set amplification module, preprocessing module and comparison module, the CZT detector, the pre-amplifying module, the pretreatment mould
Block, the comparison module and the processor successively couple；
The electric signal for the CZT detector output that the pre-amplifying module is used to receive exports after amplifying processing
To the preprocessing module；
The preprocessing module for the electric signal that the pre-amplifying module exports is formed, after enhanced processing output to
Comparison module；
The comparison module be used to export the signal for meeting preset standard in electric signal that the preprocessing module exports to
The processor is handled.
3. portable radiant dosemeter according to claim 2, which is characterized in that the pre-amplifying module includes: MOS
Pipe and the first amplifier, the source electrode of the metal-oxide-semiconductor are grounded, the drain of the metal-oxide-semiconductor respectively with first amplifier first
Input terminal and the coupling of the second input terminal, the grid of the metal-oxide-semiconductor are defeated with the CZT detector and first amplifier respectively
Outlet coupling, the output end of first amplifier are also coupled with the preprocessing module.
4. portable radiant dosemeter according to claim 2, which is characterized in that the preprocessing module includes: differential
Circuit and amplifying circuit, the differential circuit are coupled with the pre-amplifying module and the amplifying circuit respectively, the amplification
Circuit is coupled with the comparison module；
Output is put to described after the differential circuit is used to for the electric signal that the pre-amplifying module exports being formed processing
Big circuit；
Output is to comparison module after the amplifying circuit is used to amplifying the electric signal that the differential circuit exports into processing.
5. portable radiant dosemeter according to claim 4, which is characterized in that the differential circuit is CR differential electricity
Road.
6. portable radiant dosemeter according to claim 4, which is characterized in that the amplifying circuit includes: second to put
The first input end of big device, second amplifier is coupled with the differential circuit, the second input terminal of second amplifier
It being coupled with its output end, the output end of second amplifier is coupled with the comparison module, and the second of second amplifier
Input terminal is also grounded.
7. portable radiant dosemeter according to claim 2, which is characterized in that the comparison module includes: comparator,
The first input end of the comparator is coupled with reference voltage, the second input terminal of the comparator and the preprocessing module coupling
It closes, the output end of the comparator is coupled with the processor.
8. portable radiant dosemeter according to claim 1, which is characterized in that the shielding case is provided with communication ends
Mouthful, the communication port is coupled with the processor.
9. portable radiant dosemeter according to claim 1, which is characterized in that the generous ruler of the length of the CZT detector
It is very little to be less than or equal to 20mmX20mmX10mm.
10. a kind of dosage monitoring equipment characterized by comprising controlling terminal and as described in claim 1-9 any one
Portable radiant dosemeter, the controlling terminal couples with the processor in the portable radiant dosemeter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820645666.6U CN208506256U (en) | 2018-05-02 | 2018-05-02 | A kind of portable radiant dosemeter and dosage monitoring equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820645666.6U CN208506256U (en) | 2018-05-02 | 2018-05-02 | A kind of portable radiant dosemeter and dosage monitoring equipment |
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| CN208506256U true CN208506256U (en) | 2019-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109858A (en) * | 2021-04-13 | 2021-07-13 | 中北大学 | Highly integrated gamma irradiation detector |
-
2018
- 2018-05-02 CN CN201820645666.6U patent/CN208506256U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109858A (en) * | 2021-04-13 | 2021-07-13 | 中北大学 | Highly integrated gamma irradiation detector |
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