KR101672874B1 - Apparatus for detecting radiation portable and method using the same - Google Patents

Abstract

A portable radiation detection apparatus is disclosed. A portable radiation detecting apparatus according to an embodiment of the present invention includes a sensor unit for detecting radiation and converting the radiation signal into a current signal and outputting the current signal; An analog signal processing unit for amplifying a current signal output from the sensor unit and then sharpening the current signal to maintain a peak value of the signal; A temperature sensing unit for measuring a temperature of the sensor unit; A radiation detector for converting a signal output from the analog signal processor into a digital signal, analyzing the digital signal to determine whether radiation is detected, and performing temperature compensation for each section based on a compensation value preset for each temperature interval; And a result display unit for outputting the radiation detection result.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a portable radiation detection apparatus,

The present invention relates to a portable radiation detection apparatus and a method thereof, and more particularly, to a portable radiation detection apparatus and a method thereof, to which a temperature compensation algorithm for eliminating an error according to a temperature change is applied.

As the safety and security of shipping logistics is strengthened worldwide, the related technologies are being continuously studied. Particularly, researches for retrieving container cargoes such as import containers are being actively carried out. Among these studies, there are large-scale devices such as a three-dimensional container search device using X-rays and small-scale devices such as portable radiation detecting devices There is also.

The present invention relates to a portable radiation detection apparatus, and in the related art, a processor for storing a signal of a sensor and a processor for analyzing and outputting stored data are separately used in the related art, so that signal processing is fast, And maintenance is difficult. In addition, conventionally, there has been a disadvantage that a sample is always required by using a sample source set in advance to correct an error according to a temperature change, and must be corrected every time the temperature changes. That is, conventionally, there has been a problem that it is impossible to cope with a change in temperature in real time.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a portable radiation detection apparatus and method for processing signal processing, analysis, and output in a single processor.

The present invention also provides a portable radiation detection apparatus and method for performing temperature compensation for each section on the basis of compensation values set differently for different temperature intervals in order to eliminate errors caused by temperature changes.

In order to achieve the above object, a portable radiation detecting apparatus provided in the present invention includes a sensor unit for detecting radiation and converting it into a current signal and outputting the current signal; An analog signal processing unit for amplifying a current signal output from the sensor unit and then sharpening the current signal to maintain a peak value of the signal; A temperature sensing unit for measuring a temperature of the sensor unit; A radiation detector for converting a signal output from the analog signal processor into a digital signal, analyzing the digital signal to determine whether radiation is detected, and performing temperature compensation for each section based on a compensation value preset for each temperature interval; And a result display unit for outputting the radiation detection result.

Wherein the sensor unit comprises a radiation detecting sensor for converting radiation into light, the radiation detecting sensor being made of a substance that causes a light emission phenomenon based on interaction with radiation; And a photomultiplier for converting a minute light output through the radiation detection sensor into a current and outputting the current, wherein the analog signal processor includes: a preamplifier amplifying a current signal output from the sensor unit with a voltage pulse; An amplifier for amplifying the signal through the preamplifier; A signal converter for converting a signal passed through the amplifier into a Gaussian signal; A peak holder for holding a peak of a signal generated in the signal converter until the next peak; And a pulse detector for recognizing a time point at which a signal is generated by the signal converter and transmitting a signal for notifying the time point to the next stage, wherein the radiation detector includes an analog-to-digital converter for converting the signal output from the analog signal processor into a digital signal, (ADC); And a data analyzer for controlling the operation of the analog-to-digital converter (ADC) based on a predetermined operation program and for reading and analyzing the digital data from the analog-to-digital converter (ADC).

The data analyzer reads the data of the ADC from a rising edge of a signal output from the pulse detector, converts the magnitude of the digital data into a radiation energy unit, It is preferable to determine whether or not the radiation is a substance. To this end, the data analyzer can implement a radiation spectrum with the X-axis as the radiation energy and the Y-axis as the frequency, and confirm the type and intensity of the radiation from the spectrum.

Also, the data analyzer generates a signal for initializing the peak holder, and the compensation value of the radiation detector may be set differently for each temperature interval based on the temperature characteristic of the material constituting the radiation detection sensor.

According to another aspect of the present invention, there is provided a radiation detecting method comprising: generating light in response to radiation; Converting the light into a current signal; An analog signal processing step of amplifying the current signal and then sharpening the signal to maintain a peak value of the signal; Converting the analog signal into a digital signal; Analyzing the digital signal to measure a frequency of each data size, converting the digital data size to a radiation energy unit, implementing a radiation spectrum with the X-axis as the radiation energy size and the Y-axis as the frequency; Correcting the radiation spectrum by performing temperature compensation based on a current temperature based on a compensation value preset for each temperature interval; And checking the presence or absence of radiation detection and the type and intensity of the detected radiation based on the corrected radiation spectrum.

Wherein the step of correcting the radiation spectrum comprises the steps of: correcting the spectrum based on a compensation value set differently for each temperature interval based on a temperature characteristic of a material reacting with radiation, and sensing a current temperature; Detecting a compensation value corresponding to a temperature interval including the current temperature; And correcting the spectrum by applying the compensation value to a radiation energy magnitude.

The present invention is advantageous in that a single processor of signal processing, analysis, and output processes it, thereby reducing the waste of power and facilitating debugging and maintenance. Also, according to the present invention, temperature compensation is performed for each section on the basis of compensation values that are set differently for each temperature interval, so that it is possible to cope with temperature changes in real time without using a separate sample.

1 is a schematic block diagram of a portable radiation detecting apparatus according to an embodiment of the present invention.
2 is a schematic block diagram of a sensor unit included in the portable radiation detecting apparatus illustrated in FIG.
FIG. 3 is a graph illustrating the operating characteristics of a material constituting the gamma detection sensor included in the sensor unit illustrated in FIG. 2 according to temperature changes.
FIG. 4 is a schematic block diagram of an analog signal processing unit included in the portable radiation detecting apparatus illustrated in FIG. 1; FIG.
5 is a table showing preferred operating characteristics of the amplifier illustrated in FIG.
FIG. 6 is a diagram showing an example of an output signal of the gamma ray detection sensor illustrated in FIG. 2. FIG.
FIG. 7 is a diagram showing an example of a result of converting the output signal of the gamma ray detecting sensor illustrated in FIG. 6 into a Gaussian form in a signal converter implemented by a CR circuit and an RC circuit.
8 is a circuit diagram of the signal converter illustrated in FIG.
Fig. 9 is a circuit diagram for the peak holder illustrated in Fig. 4. Fig.
10 is a circuit diagram for the pulse detector illustrated in FIG.
FIG. 11 is a schematic block diagram of a radiation detection unit included in the portable radiation detection apparatus illustrated in FIG. 1; FIG.
12 is a schematic processing flowchart of a radiation detection method according to an embodiment of the present invention.
13 is a schematic process flow chart for the radiation spectrum correction step by temperature compensation illustrated in Fig.
14 is a diagram for comparing temperature compensation before and after applying the algorithm according to an embodiment of the present invention.
FIG. 15 is a table showing results of comparison between before and after application of the temperature compensation algorithm disclosed in the present invention, based on the example illustrated in FIG. 14. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, which will be described in detail to facilitate a person skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and like parts are denoted by similar reference numerals throughout the specification. And a detailed description thereof will be omitted to omit descriptions of portions that can be readily understood by those skilled in the art.

Throughout the specification and claims, where a section includes a constituent, it does not exclude other elements unless specifically stated otherwise, but may include other elements.

1 is a schematic block diagram of a portable radiation detecting apparatus according to an embodiment of the present invention. 1, a portable radiation detecting apparatus according to an embodiment of the present invention includes a sensor unit 100, an analog signal processing unit 200, a radiation detecting unit 300, a temperature sensor 400, and a result display unit 500 do.

The sensor unit 100 senses radiation, converts the radiation into a current signal, and outputs the current signal.

The analog signal processing unit 200 processes analog signals that occur during the processing for detecting radiation. That is, the analog signal processing unit 200 amplifies the current signal output from the sensor unit 100 and then sharpens the signal to maintain the peak value of the signal.

The radiation detector 300 converts the signal output from the analog signal processor 200 into a digital signal, analyzes the digital signal to determine whether or not the radiation is detected, and performs temperature compensation on a per- Conduct. For this, the radiation detector 300 preferably stores various operation programs in advance, and the compensation value may be stored in advance.

The temperature sensor 400 senses the temperature of the sensor unit 100 and transmits the sensed temperature to the radiation detecting unit 300 to reflect the real time temperature during the temperature compensation.

The result display unit 500 outputs the radiation detection result.

2 is a schematic block diagram of a sensor unit 100 included in the portable radiation detection apparatus illustrated in FIG. Referring to FIG. 2, the sensor unit 100 includes a gamma ray detection sensor 110 and a photomultiplier 120.

The gamma ray detection sensor 110 is composed of a material (for example, a NaI (T1) scintillator) that causes a luminescence phenomenon based on interaction with radiation, particularly, a gamma ray. At this time, since the intensity of light emitted according to the temperature changes depending on the temperature of the material causing the luminescence phenomenon, an error may occur if the material is not taken into consideration. Therefore, these changes must be considered to derive accurate radiation detection results. In the present invention, the compensation value corresponding to the current temperature is applied to the radiation detection result by setting the compensation value for each interval differently according to the temperature interval in consideration of the operating characteristic according to the temperature change, thereby minimizing the error according to the temperature variation .

In the case of a NaI (T1) scintillator mainly used for gamma ray detection, as shown in FIG. 3, light is output at a maximum temperature (about 30) and the temperature is lowered or higher The output of the light gradually weakens. Therefore, according to the present invention, in the case of a portable radiation detecting apparatus using a NaI (T1) scintillator as a light emitting material, the temperature interval is divided into [0-20] sections G1, 30], [30-40], and [40-60] sections, and a compensation value reflecting the slope of the graph is previously set for each section, It is possible to perform temperature compensation based on the compensation value. For example, the compensation value is set to 0.28% in the [0-20] section G1, the compensation value is set to 0.23% in the [20-30] section G2, ), The compensation value is set to 0.3%, the compensation value is set to 0.35% in the range [40-60] (G4), the current temperature is measured before the output of the radiation detection result, And the result (e.g., the radiation spectrum) can be corrected. At this time, FIG. 3 is only for explaining one embodiment of the present invention, and thus the present invention is not limited thereto. That is, when the light emitting material is a material other than the NaI (T1) scintillator, the temperature interval may be set differently according to the operation characteristics thereof, and the compensation value may be set differently according to the slope change.

The photomultiplier tube 120 converts the minute light output from the gamma ray detection sensor 110 into a current and outputs the current. To this end, the photomultiplier tube is configured in the form of a tube sealed with a vacuum tube, an incident window, a photocathode, a dynode, and anodes, and the light output from the gamma- And then photoelectrons are generated by passing through a photoelectric cathode. The photoelectrons thus generated are gradually amplified while passing through the dynode, and are gathered at the anode and output in the form of current.

FIG. 4 is a schematic block diagram of an analog signal processing unit 200 included in the portable radiation detecting apparatus illustrated in FIG. 4, the analog signal processing unit 200 includes a preamplifier 210, an amplifier 220, a pulse shaper 230, a peak holder 240, And a pulse detector (Pulse Detector) 250.

The preamplifier 210 amplifies the current output from the optoelectronic amplifier 120 of FIG. 2 by a voltage pulse and outputs the amplified current.

The amplifier 220 amplifies the signal through the preamplifier 210 and outputs the amplified signal. This is because the amplitude of the signal output through the preamplifier 210 is very small and thus it is difficult to convert the signal into a Gaussian signal and it is difficult to determine whether a pulse is generated. On the other hand, gamma rays generated from nuclides occur stochastically rather than with a constant period, so that when a large amount of nuclei are present near the nucleus, the cycle of occurrence is accelerated. Accordingly, the amplifier 220 must satisfy the characteristic that the reaction rate must be faster along the generation period, and the peak value of the signal must be accurately transmitted for accurate radiation detection. For this purpose, it is desirable to employ an amplifier 220 having a bandwidth of 1.5 GHz and a slew rate of 350 V / us. In FIG. 5, an amplifier (for example, , LMH6624) are shown in the table. Figure 5 shows an example of a preferred amplifier that is selectable, but the invention is not limited thereby.

A pulse transformer 230 transforms the signal passed through the amplifier 220 into a Gaussian signal. In the case of the signal output from the gamma ray detection sensor 110 of FIG. 2, the signal is converted as follows. As illustrated in FIG. 6, when a pulse is generated before the end of one pulse, And it is impossible to analyze normal nuclides. That is, the signal converter 230 converts the output signal of the gamma ray detection sensor 110 of FIG. 2, which is input via the amplifier 220, into a Gaussian signal as illustrated in FIG. 7, And eliminates external noise, thereby enabling normal nuclide analysis. To this end, the signal converter 230 includes a CR circuit and an RC circuit. The signal converter 230 converts a signal input through the amplifier 220 into a Gaussian signal by adjusting the time constant by changing the size of the resistor and the capacitor. An example of such a signal converter 230 is illustrated in FIG.

Peak Holder 240 maintains a peak of the signal generated in signal converter 230 until it is read at the next stage. That is, the peak value is maintained until it is read by the ACD of the radiation detector 300 (FIG. 11). To this end, the peak holder 240 includes a capacitor, and the reaction rate and peak value holding time are determined based on the capacitance magnitude of the capacitor. Therefore, it is important to appropriately set the capacitance of the capacitor. For example, when the capacitance of the capacitor is large, it does not immediately respond to a fast signal, but also maintains a value smaller than the peak of the input signal. Conversely, when the capacitance of the capacitor is small, Because it drops quickly, the correct value can not be read in the next step. Therefore, in order to ensure that the peak remains unchanged for a long time, it is desirable to use the largest capacity within a range capable of capturing all peaks of high-energy fast signals. An example of such a peak holder 240 is illustrated in FIG.

A pulse detector (pulse detector) 250 is a circuit for recognizing when a signal is generated and informing it of the signal. A signal for notifying when the signal is generated in the signal converter 230 and informing the signal is transmitted to the next stage The pulse detector 250 serves to activate the ACD of the radiation detector 300. For this purpose, the pulse detector 250 generates an ACD (shown in FIG. And a comparator which compares a voltage of a natural radiation ray set in advance with a voltage of a signal generated by the signal converter and outputs the voltage when the voltage of the signal generated by the signal converter is higher as a result of the comparison of the comparator. An example of the pulse detector 250 is illustrated in FIG.

11 is a schematic block diagram of a radiation detector 300 included in the portable radiation detection apparatus illustrated in FIG. Referring to FIG. 11, the radiation detector 300 includes an analog digital converter (hereinafter referred to as an analog digital converter) 310 and a data analyzer 320.

The ADC 310 converts the signal output from the analog signal processing unit 200 of FIG. 1 into a digital signal. That is, the peak value output from the peak holder 240 of FIG. 4 is converted into a digital signal.

The data analyzer 320 controls the operation of the ADC 310 based on a preset operation program, reads the digital data from the ADC 310, and performs analysis for radiation detection. To this end, the data analyzer 320 reads the data of the ADC 310 at the rising edge of the signal output from the pulse detector 250 of FIG. That is, the data analyzer 320 reads the data of the ADC 310 by executing a preset interrupt service routine (ISR) on the rising edge, and stores one or more data in an array You can read it all at once. On the other hand, after the data of the ADC 310 is read, a signal for initializing the peak holder 240 of FIG. 4 is generated. Then, the peak holder 240 of FIG. 4 initializes the peak value held in response to the initialization signal.

In addition, the data analyzer 320 analyzes the digital data read from the ADC 310 to determine whether it is a radiation material. To this end, the frequency of the digital data is measured, and the digital data size is converted into radiation energy units The frequency of each energy is analyzed to determine whether it is a radiation substance. To this end, the data analyzer 320 preferably implements a radiation spectrum with the X-axis as the radiation energy and the Y-axis as the frequency, and confirms the type and intensity of the radiation from the spectrum.

The data analyzer 320 performs a predetermined temperature compensation algorithm in order to compensate for the error according to the temperature change included in the digital data. The data analyzer 320 performs the temperature compensation algorithm described in the description of the gamma ray detection sensor 110 of FIG. 2 It is preferable to perform the temperature compensation algorithm on the basis of the compensation value set differently for each temperature section based on the temperature characteristic of the light emitting material. In addition, the data analyzer 320 preferably performs the temperature compensation algorithm every predetermined compensation period (for example, 4 seconds) in consideration of the time for accumulating the radiation, instead of continuously executing the temperature compensation algorithm.

12 is a schematic processing flowchart of a radiation detection method according to an embodiment of the present invention. 1 and 12, a radiation detection method using a portable radiation detection apparatus according to an embodiment of the present invention is as follows.

First, the sensor unit 100 detects radiation, that is, gamma rays (S100). At this time, if the light emitting material contained in the sensor unit 100 reacts with the gamma rays to generate light, the light is converted into a current signal by the photoelectrically-converting apparatus (shown in FIG.

Then, the analog signal processor 200 transforms the current signal into an analytical signal (S200). That is, since the current signal is weak, it is amplified and the noise included in the signal is removed to transform it into an analytical signal. To this end, the analog signal processor 200 amplifies the current signal and then sharpens the current signal to maintain the peak value of the signal.

After receiving the analog peak value, the radiation detector 300 converts the signal into a digital signal (S300), analyzes the digital signal to measure the frequency of the digital signal, (S400). The X-axis is converted into the radiation energy and the Y-axis is converted into the frequency spectrum. Since the radiation spectrum generated at this time may include an error depending on the temperature characteristic of the light emitting material, the radiation detecting unit 300 may calculate the current temperature based on the compensation value preset for each temperature interval according to the temperature characteristic of the light emitting material. The reflected radiation spectrum is corrected by performing temperature compensation (S500). At this time, it is preferable that the radiation spectrum correction step (S500) corrects the spectrum based on the compensation value set differently for each temperature interval based on the temperature characteristic of the material reacting with radiation. In addition, it is preferable to perform the compensation every predetermined compensation period (for example, 4 seconds) in consideration of the time for accumulating the radiation.

Then, based on the corrected radiation spectrum, whether or not the radiation is detected and the type and intensity of the detected radiation are confirmed (S600).

13 is a schematic process flow chart for the step S500 of correcting the radiation spectrum by the temperature compensation illustrated in FIG. Referring to FIG. 1 and FIG. 13, in the step S500 of correcting the radiation spectrum by temperature compensation, a step S510 of waiting for a corresponding time is performed first for each compensation period. When the waiting time has elapsed, the current temperature (Cr.tmp) of the sensor unit 100 including the light emitting material is measured (S520). The current temperature Cr.tmp is compared with the peak temperature Pk.tmp of the light emitting material in order to detect a compensation value corresponding to the temperature range including the current temperature Cr.tmp at operation S530. 2, when the light emitting material is a NaI (T1) scintillator, the peak temperature (Pk.tmp) is 30, and thus the process (S530) Higher or lower. If the current temperature Cr.tmp is lower than the peak temperature Pk.tmp, the low temperature compensation value is calculated in step S540. If the current temperature Cr.tmp is higher than the peak temperature Pk.tmp, The compensation value is calculated (S550). Referring to FIG. 2, if the light emitting material is a NaI (T1) scintillator and the current temperature is 25, the compensation value is 0.23%, so that the process S540 determines whether the peak temperature Pk (5 * 0.23) by multiplying the difference value (5) between the current temperature (Crtmp) and the current temperature (Crtmp) by the compensation value (0.23). If the light emitting material is a NaI (T1) scintillator and the current temperature is 34, referring to the example described with reference to FIG. 2, the compensation value is 0.3%, so the process (S550) (4 * 0.3) by multiplying the difference value (4) between the current temperature (Cr.tmp) and the current temperature (Cr.tmp) by the compensation value (0.3).

After calculating the compensation value for each temperature interval, the radiation spectrum is corrected on the basis of the compensation value for each temperature interval (S560). An example in which the radiation spectrum is corrected by temperature compensation is illustrated in Figs. 14 and 15. Fig.

Fig. 14 (a) shows the radiation spectrum before temperature compensation, and Fig. 14 (b) shows the radiation spectrum after temperature compensation. Referring to FIG. 14 (a), the position of the radiation spectrum is shifted according to the temperature. On the other hand, referring to FIG. 14 (b), it can be seen that, even if the temperature changes, the position of the radiation spectrum is fixed without being shifted. FIG. 15 is a table showing results of comparison between before and after application of the temperature compensation algorithm disclosed in the present invention, based on the example illustrated in FIG. 14. FIG. Referring to FIG. 15, changes in the position of the radiation energy values before and after application of the temperature compensation algorithm can be confirmed numerically.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders .

It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

Claims (19)

In a portable radiation detection apparatus,
A sensor unit that detects radiation and converts the radiation signal into a current signal and outputs the current signal;
An analog signal processing unit for amplifying a current signal output from the sensor unit and transforming the current signal into a Gaussian form to maintain a peak value of the signal;
A temperature sensing unit for measuring a temperature of the sensor unit;
A radiation detector for converting a signal output from the analog signal processor into a digital signal, analyzing the digital signal to determine whether radiation is detected, and performing temperature compensation for each section based on a compensation value preset for each temperature interval; And
A result display unit for outputting the radiation detection result;
Lt; / RTI >
The compensation value of the radiation detector is
And is set differently according to a temperature interval based on a temperature characteristic of a substance that senses radiation contained in the sensor unit
Wherein the sensor unit includes a NaI (T1) scintillator,
The compensation value of the radiation detector is
0.2% in the temperature range from 0 ° C to less than 20 ° C, 0.23% in the temperature range from 20 ° C to less than 30 ° C, 0.3% in the temperature range from 30 ° C to less than 40 ° C, C and 0.35% in a temperature interval of less than 60 ° C. The apparatus of claim 1, wherein the sensor unit
A radiation detecting sensor composed of a substance that causes a luminescence phenomenon based on interaction with radiation and converts the radiation into light; And
And a photomultiplier for converting the minute light output through the radiation detection sensor into a current and outputting the current. delete 3. A method according to claim 1 or 2,
Gamma ray. ≪ / RTI > The apparatus of claim 1, wherein the analog signal processor
A preamplifier for amplifying a current signal output from the sensor unit by a voltage pulse;
An amplifier for amplifying the signal through the preamplifier;
A signal converter for converting a signal passed through the amplifier into a Gaussian signal;
A peak holder for holding a peak of a signal generated in the signal converter until the next peak; And
And a pulse detector for detecting a point of time when a signal is generated in the signal converter and transmitting a signal for informing the point of time to the next stage. 6. The apparatus of claim 5, wherein the amplifier
A band width of 1.5 GHz, and a slew rate of 350 V / us. 6. The apparatus of claim 5, wherein the signal converter
It is implemented with a CR circuit and an RC circuit,
Wherein the signal inputted through the amplifier is converted into a Gaussian signal by controlling the time constant. 6. The apparatus of claim 5, wherein the peak holder
And a capacitor for maintaining a peak value of the generated signal,
Wherein the reaction rate and the peak value holding time are determined based on the capacity of the capacitor. 6. The apparatus of claim 5, wherein the pulse detector
And a comparator for comparing a voltage of a natural radiation preset in advance with a voltage of a signal generated in the signal converter,
And outputs the voltage when the voltage of the signal generated in the signal converter is higher as a result of the comparison of the comparator. 6. The apparatus of claim 5, wherein the radiation detector
An analog-to-digital converter (ADC) for converting the signal output from the analog signal processor into a digital signal; And
And a data analyzer for controlling the operation of the analog-to-digital converter (ADC) based on a preset operation program and for reading and analyzing the digital data from the analog-to-digital converter (ADC). 11. The apparatus of claim 10, wherein the data analyzer
Reads data of the analog-to-digital converter (ADC) at a rising edge of a signal output from the pulse detector, and generates a signal for initializing the peak holder. 12. The apparatus of claim 11, wherein the data analyzer
The interruption service routine (ISR) is executed on the rising edge to read the data of the analog-to-digital converter (ADC), and one or more data is stored in the array and read at a time Wherein the radiation detector comprises: 11. The apparatus of claim 10, wherein the data analyzer
Wherein the digital data read from the analog-to-digital converter is analyzed to determine a frequency of the data size, and the digital data size is converted into a radiation energy unit and the frequency of each energy is analyzed to determine whether a radiation material is present. Detection device. 14. The apparatus of claim 13, wherein the data analyzer
Wherein a radiation spectrum having the X-axis as the radiation energy and the Y-axis as the frequency is implemented, and the type and intensity of the radiation are confirmed from the spectrum. delete In the radiation detection method,
Generating light in response to radiation;
Converting the light into a current signal;
An analog signal processing step of amplifying the current signal and then transforming the current signal into a Gaussian form to maintain a peak value of the signal;
Converting the analog signal into a digital signal;
Analyzing the digital signal to measure a frequency of each data size, converting the digital data size to a radiation energy unit, implementing a radiation spectrum with the X-axis as the radiation energy size and the Y-axis as the frequency;
Correcting the radiation spectrum by performing temperature compensation based on a current temperature based on a compensation value preset for each temperature interval; And
Determining whether the radiation is detected and the type and intensity of the detected radiation based on the corrected radiation spectrum;
Lt; / RTI >
The step of calibrating the radiation spectrum
The spectrum is corrected on the basis of the compensation value set differently for each temperature section based on the temperature characteristic of the material reacting with radiation,
The operation of detecting radiation and converting it into a current signal and outputting the radiation is performed by a sensor unit including a NaI (T1) scintillator,
The compensation value
0.2% in the temperature range from 0 ° C to less than 20 ° C, 0.23% in the temperature range from 20 ° C to less than 30 ° C, 0.3% in the temperature range from 30 ° C to less than 40 ° C, C < / RTI > and less than < RTI ID = 0.0 > 60 C. ≪ / RTI > delete 17. The method of claim 16, wherein the step of calibrating the radiation spectrum
Sensing a current temperature;
Detecting a compensation value corresponding to a temperature interval including the current temperature; And
And applying the compensation value to a radiation energy magnitude to correct the spectrum. 19. The method of claim 18, wherein the step of calibrating the radiation spectrum
Wherein said step of performing the radiation detection is performed every predetermined compensation period in consideration of the time for accumulating the radiation.

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