JP2015206780A - Radiation perception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation perception device which allows a user to easily, intuitively and audibly grasp the dose-rate distribution.SOLUTION: In a radiation perception device comprising: a photoelectric multiplier which converts and amplifies an optical signal generated by a scintillation fiber for detecting a radiation of an object to be measured in an environment into an electric signal; a signal waveform pre-processing unit which performs signal waveform pre-processing on the amplified electric signal for improving temporal resolution; a delay unit which performs time interval adjustment of a start signal and a stop signal for the signal from the signal waveform pre-processing unit; a time peak converter which performs input time difference peak conversion for converting the time interval into the magnitude of output for the signal from the delay unit; a multiple peak analyzer which classifies the output signal from the time peak converter in accordance with the strength of the signal; and an auditory unit which makes the output signal from the multiple peak analyzer audible, the auditory unit consists of a plurality of piezoelectric buzzers arranged in a first direction in parallel to the longitudinal direction of the scintillation fiber.

Description

  The present invention relates to a radiation perception apparatus capable of easily, intuitively, auditorily, and visually grasping a dose rate distribution.

  When measuring the air dose rate distribution at a decontamination site, radiation facility, radioactive waste storage facility, or the like, for example, a portable dosimeter is used.

As such a portable device, Patent Document 1 (Japanese Patent Laid-Open No. 2012-242192) discloses a GM tube survey meter.
JP 2012-242192 A

  When a conventional portable dosimeter is used to continuously investigate the dose rate distribution in a given area, the operator scans the measurement points using a portable dosimeter that is held by hand. There is a problem in that it takes time and effort to record and measure point by point, which requires time and labor.

  Thus, when a conventional portable dosimeter is used, there is a problem that it is difficult to intuitively and intuitively grasp the dose rate distribution.

  This invention solves the said subject, The invention which concerns on Claim 1 uses the scintillation fiber which detects the radiation of the to-be-measured object in an environment, and the optical signal generated with the said scintillation fiber as an electrical signal. A photomultiplier tube that converts and amplifies, a preamplifier that amplifies the signal from the photomultiplier tube into an electrical signal, and a signal waveform that preprocesses the electrical waveform amplified by the preamplifier to improve time resolution A pre-processing device, a signal from the signal waveform pre-processing device, a delay device for adjusting a time interval between a start signal and a stop signal, and a signal from the delay device, an input time difference for converting the time interval into an output magnitude A time wave height converter in which the wave height conversion is performed, and a multi-wave height analyzer that separates an output signal from the time wave height converter according to the intensity of the signal; A radiological perception apparatus comprising: a hearing part that auralizes an output signal from the multi-wave height analyzer; and the hearing part includes a plurality of pronunciations arranged in a first direction parallel to a longitudinal direction of the scintillation fiber. It consists of parts.

  According to a second aspect of the present invention, in the radiation perception apparatus according to the first aspect, the sound volume of the sound generation unit is controlled in accordance with the detected radiation dose rate.

  According to a third aspect of the present invention, in the radiation perception apparatus according to the first aspect, the frequency of the sound generating unit is controlled in accordance with the detected dose rate of the radiation.

  According to a fourth aspect of the present invention, in the radiation perception apparatus according to any one of the first to third aspects, a display unit that visualizes an output signal from the multi-wave height analyzer, And the display unit includes a plurality of light emitting units arranged in a first direction parallel to a longitudinal direction of the scintillation fiber.

The invention according to claim 5 is characterized in that, in the radiation perception apparatus according to claim 4, the emission intensity of the light emitting unit is controlled in accordance with the dose rate of the detected radiation.

  According to a sixth aspect of the present invention, in the radiation perception apparatus according to the fourth aspect, the color of the light emitting unit is controlled in accordance with the detected radiation dose rate.

  The invention according to claim 7 is the radiation perception apparatus according to claim 4, wherein the display unit includes a first direction parallel to a longitudinal direction of the scintillation fiber and a first direction perpendicular to the longitudinal direction. It consists of a plurality of light emitting sections arranged in a matrix in two directions.

  The invention according to claim 8 is the radiation perception apparatus according to claim 7, wherein whether or not the light emitting unit arranged in the first direction emits light according to the position of the detected radiation. It is controlled.

The invention according to claim 9 is the radiation perception apparatus according to claim 7 or 8,
Whether to emit light from the light emitting unit arranged in the second direction is controlled according to the detected radiation dose rate.

  Since the radiation perception apparatus according to the present invention includes a plurality of piezoelectric buzzers (sound generation units) arranged in a first direction parallel to the longitudinal direction of the scintillation fiber, such a radiation perception apparatus according to the present invention is provided. According to this, it becomes possible to grasp the dose rate distribution simply, intuitively and audibly.

  Also, according to the radiation perception apparatus according to the present invention, it is possible to grasp the dose rate distribution simply, intuitively and visually.

It is a figure explaining the outline | summary of the radiation perception-izing apparatus 1 which concerns on embodiment of this invention. It is a figure explaining the measurement principle of the radiation perception apparatus 1 which concerns on embodiment of this invention. It is a figure which shows the relationship between the scintillation fiber bundle 20 and the display part 100 of the radiation perception apparatus 1 which concerns on embodiment of this invention. It is a figure explaining the outline | summary of the radiation perception-izing apparatus 1 which concerns on other embodiment of this invention. It is a figure which shows the relationship between the scintillation fiber bundle 20 and the display part 100 of the radiation perception-izing apparatus 1 which concerns on other embodiment of this invention. It is a figure explaining the outline | summary of the radiation perception-izing apparatus 1 which concerns on other embodiment of this invention. It is a figure which shows the relationship between the scintillation fiber bundle 20 and the auditory part 130 of the radiation perception apparatus 1 which concerns on other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic block diagram of a radiation perception apparatus 1 according to an embodiment of the present invention.

  The radiation perception apparatus 1 includes a scintillation fiber bundle 20 that is linear in the longitudinal direction, and a display unit 100 that is provided along the longitudinal direction of the scintillation fiber bundle 20. The longitudinal direction of the scintillation fiber bundle 20 is defined as the first direction. The x direction in FIG. 1 is the first direction.

  The scintillation fiber bundle 20 is formed by bundling a plurality of scintillation fibers 10. The light propagated through each scintillation fiber 10 enters the photomultiplier tubes 30 and 30 ′ provided at both ends of the scintillation fiber bundle 20.

  Here, the principle of radiation measurement using the scintillation fiber 10 will be described. FIG. 2 is a diagram for explaining the measurement principle of the radiation perception apparatus 1 according to the embodiment of the present invention.

  As shown in FIG. 2, the scintillation fiber 10 is composed of a core 11 located at the center and a clad 12 surrounding the core 11 like a normal optical fiber, and a plastic scintillator that reacts with radiation is used for the core 11. .

  The principle of light emission is the same as other scintillators, and scintillation light is generated by the excitation action of radiation. The light generated in the core 11 due to radiation propagates as a light pipe (light guide) by the total reflection at the boundary between the core 11 and the clad 12 as in the case of a normal optical fiber, and is located at the end. It reaches the photomultiplier tubes 30 and 30 ′ and is detected.

As shown in FIG. 2A, the refractive index n ₁ of the core 11 is set larger than the refractive index n _{2 of the} cladding (n ₁ > n ₂ ), and the critical angle θ _C.
θ _C = sin ⁻¹ (n ₂ / n ₁ )
On the other hand, if the incident angle θ _A from the core to the cladding is θ _A > θ _C , the light is reflected at the boundary surface,
If the incident angle θ _B from the core to the cladding is θ _B <θ _C , light leaks to the outside. Therefore, for example, the light emitted on the central axis propagates by repeating total reflection only of the light emitted in the cone of the critical angle by the core 11 and the clad 12 (indicated by reference numeral 14 in FIG. 6B). Will reach the photomultiplier tubes 30, 30 ′ provided at both ends.

  Details of the display unit 100 provided along the scintillation fiber bundle 20 which is a bundle of scintillation fibers 10 as described above will be described. FIG. 3 is a diagram showing the relationship between the scintillation fiber bundle 20 and the display unit 100 of the radiation perception apparatus 1 according to the embodiment of the present invention.

  In FIG. 3, the scintillation fiber bundle 20 and a part of the display unit 100 are shown enlarged.

  The display unit 100 includes a plurality of LED units 115 arranged linearly with a first direction (x direction) parallel to the longitudinal direction of the scintillation fiber bundle 20. Such an LED unit 115 is provided on the base 110, and its light emission is controlled by the light emission control unit 90.

  As the LED unit 115, either (a) a single color whose emission intensity is variable or (b) a display capable of displaying a plurality of colors can be used. In addition, as such a display part 100, an LED tape can be used.

In the present embodiment, it is assumed that m LED units 115 are arranged in the first direction (x direction). In FIG. 3, the n-th LED unit 115 in the first direction (x direction) It shows a state. In place of the LED unit 115, other light emitting means may be used. The number of LED units 115 arranged in the first direction (x direction) may be provided over the length of the scintillation fiber bundle 20, and is not particularly limited.

  When the scintillation fiber 10 detects radiation of the measurement object in the environment, it propagates through the scintillation fiber 10 and reaches the photomultiplier tubes 30 and 30 ′ provided at both ends of the scintillation fiber 10.

  Each photomultiplier tube 30, 30 ′ converts and amplifies the optical signal generated by the scintillation fiber 10 into an electrical signal. The preamplifiers 40 and 40 'amplify signals from the photomultiplier tubes 30 and 30' into electric signals.

  The CFD 50, 50 '(also referred to as "signal waveform pre-processing device") performs signal waveform pre-processing for improving the time resolution of the electrical signal amplified by the preamplifiers 40, 40'.

  The delay device 60 adjusts the time interval between the start signal and the stop signal for the signals from the CFDs 50 and 50 '.

  In the TAC 70 (also referred to as “time wave height converter”), input time difference wave height conversion for converting the signal from the delay device 60 into a magnitude of the output is performed.

  Further, the output signal from the TAC 70 (also referred to as “multiple wave height analyzer”) is classified according to the intensity of the signal.

  From the TAC 70, detection position information relating to which position of the scintillation fiber 10 the radiation has entered and radiation dose rate information relating to what the radiation dose is are output to the light emission control unit 90. The

  The light emission control unit 90 controls whether or not the LED units 115 arranged in the first direction (x direction) are caused to emit light according to the position of the detected radiation. That is, in the display unit 100, the LED unit 115 arranged in the first direction (x direction) serves as an indicator indicating at which position of the scintillation fiber 10 radiation has entered.

  In the case where a single color LED whose emission intensity is variable is used as the LED unit 115, the emission control unit 90 controls the emission intensity of the LED unit 115 according to the detected radiation dose rate. That is, the higher the dose rate of the detected radiation, the stronger the emission intensity of the LED unit 115.

  On the other hand, when the LED unit 115 is capable of displaying a plurality of colors, the light emission control unit 90 controls the color of the LED unit 115 according to the detected radiation dose rate. . For example, when the radiation dose rate is evaluated in three stages of low, medium and high, the LED unit 115 emits “blue” when it is at a low level, and the LED unit 115 emits “yellow” when it is at a medium level. When the level is high, control is performed so that the LED unit 115 emits light in “red”. The combination of dose rate and color is arbitrary.

The light emission control of the LED unit 115 by the light emission control unit 90 will be described with reference to FIG. As shown in FIG. 3, when radiation is incident on a section of x _n (n = _{1 to} m) of the scintillation fiber 10 in the scintillation fiber bundle 20, in the radiation perception apparatus 1 according to the present invention, the first direction In the (x direction), the nth LED unit 115 is caused to emit light.

  If the LED unit 115 is a single color and the light emission intensity is variable, the nth LED unit 115 emits light with the lowest light emission intensity.

  In addition, when an LED unit 115 capable of displaying a plurality of colors is used, the LED unit 115 is caused to emit “blue” in the previous example.

  As described above, in the radiation perception apparatus 1 according to the present invention, the display unit 100 provided along the scintillation fiber bundle 20 can indicate which position has what dose rate.

  As described above, the radiation perception apparatus 1 according to the present invention includes a plurality of light emitting units (LED units 115) arranged in the first direction parallel to the longitudinal direction of the scintillation fiber 10. According to the radiation perception apparatus 1, it is possible to grasp the dose rate distribution simply, intuitively and visually.

  Next, another embodiment of the present invention will be described. FIG. 4 is a schematic block diagram of a radiation perception apparatus 1 according to another embodiment of the present invention.

  The radiation perception apparatus 1 includes a scintillation fiber bundle 20 that is linear in the longitudinal direction, and a display unit 100 that is provided along the longitudinal direction of the scintillation fiber bundle 20. The longitudinal direction of the scintillation fiber bundle 20 is defined as the first direction, and the direction perpendicular to the hand direction is defined as the second direction. The x direction in FIG. 4 is the first direction, and the y direction is the second direction.

  The scintillation fiber bundle 20 is formed by bundling a plurality of scintillation fibers 10. The light propagated through each scintillation fiber 10 enters the photomultiplier tubes 30 and 30 ′ provided at both ends of the scintillation fiber bundle 20.

  Here, the principle of radiation measurement using the scintillation fiber 10 is the same as in the previous embodiment.

  Details of the display unit 100 provided along the scintillation fiber bundle 20 which is a bundle of scintillation fibers 10 as described above will be described. FIG. 5 is a diagram showing a relationship between the scintillation fiber bundle 20 and the display unit 100 of the radiation perception apparatus 1 according to another embodiment of the present invention.

  In FIG. 5, the scintillation fiber bundle 20 and a part of the display unit 100 are shown in an enlarged manner.

  The display unit 100 is arranged in a matrix in a first direction (x direction) parallel to the longitudinal direction of the scintillation fiber bundle 20 and a second direction (y direction) perpendicular to the longitudinal direction (x direction). A plurality of LEDs 120 are provided. Such an LED 120 is provided on the base 110, and its light emission is controlled by the light emission control unit 90.

In the present embodiment, it is assumed that m LEDs 120 are arranged in the first direction (x direction), and eight LEDs 120 are arranged in the second direction (y direction). The state of the n-th LED 120 in one direction (x direction) is shown. Note that other light emitting means may be used in place of the LED 120. The number of LEDs 120 arranged in the first direction (x direction) may be provided over the length of the scintillation fiber bundle 20, and is not particularly limited.

  In addition, since the LEDs 120 arranged in the second direction (y direction) exhibit high and low dose rates, the number of LEDs 120 arranged in the second direction (y direction) is preferably two or more.

  When the scintillation fiber 10 detects radiation of the measurement object in the environment, it propagates through the scintillation fiber 10 and reaches the photomultiplier tubes 30 and 30 ′ provided at both ends of the scintillation fiber 10.

  Each photomultiplier tube 30, 30 ′ converts and amplifies the optical signal generated by the scintillation fiber 10 into an electrical signal. The preamplifiers 40 and 40 'amplify signals from the photomultiplier tubes 30 and 30' into electric signals.

  The CFD 50, 50 '(also referred to as "signal waveform pre-processing device") performs signal waveform pre-processing for improving the time resolution of the electrical signal amplified by the preamplifiers 40, 40'.

  The delay device 60 adjusts the time interval between the start signal and the stop signal for the signals from the CFDs 50 and 50 '.

  In the TAC 70 (also referred to as “time wave height converter”), input time difference wave height conversion for converting the signal from the delay device 60 into a magnitude of the output is performed.

  Further, the output signal from the TAC 70 (also referred to as “multiple wave height analyzer”) is classified according to the intensity of the signal.

  From the TAC 70, detection position information relating to which position of the scintillation fiber 10 the radiation has entered and radiation dose rate information relating to what the radiation dose is are output to the light emission control unit 90. The

  The light emission control unit 90 controls whether or not the LEDs 120 arranged in the first direction (x direction) are caused to emit light according to the position of the detected radiation. That is, in the display unit 100, the LED 120 arranged in the first direction (x direction) serves as an indicator indicating at which position of the scintillation fiber 10 radiation has entered.

  Further, the light emission control unit 90 controls whether or not the LEDs 120 arranged in the second direction (y direction) are caused to emit light according to the detected radiation dose rate. That is, in the display unit 100, the LED 120 arranged in the second direction (y direction) serves as an indicator that indicates how much radiation has entered the scintillation fiber 10. In the present embodiment, since there are eight LEDs 120 arranged in the second direction (y direction), it is possible to notify the level of the eight-stage dose rate.

The light emission control of the LED 120 by the light emission control unit 90 will be described with reference to FIG. As shown in FIG. 5, when the radiation having the lowest dose rate among the eight dose rates is incident on the _xn (n = _{1 to} m) section of the scintillation fiber 10 in the scintillation fiber bundle 20, the present invention is applied. In such a radiation perception apparatus 1, light emission control is performed such that the first LED 120 is turned on in the nth direction in the first direction (x direction) and in the second direction (y direction).

As described above, in the radiation perception apparatus 1 according to the present invention, the display unit 100 provided along the scintillation fiber bundle 20 can indicate which position has what dose rate.

  The radiation perception apparatus 1 according to another embodiment as described above is arranged in a matrix in a first direction parallel to the longitudinal direction of the scintillation fiber 10 and a second direction perpendicular to the longitudinal direction. Since the plurality of light emitting units (LEDs 120) are provided, according to the radiation perception apparatus 1 according to such another embodiment, the dose rate distribution can be easily and intuitively grasped visually. It becomes.

  Next, another embodiment of the present invention will be described. FIG. 6 is a schematic block diagram of a radiation perception apparatus 1 according to another embodiment of the present invention.

  So far, in the first embodiment and the second embodiment described above, the visualization is performed by the LED unit 115 or the like when the dose rate distribution is perceived. On the other hand, in the third embodiment described below, when the dose rate distribution is perceived, the sounding unit such as a piezoelectric buzzer or a piezoelectric speaker is used for auralization.

  The radiation perception apparatus 1 includes a scintillation fiber bundle 20 that is straight in the longitudinal direction, and a hearing unit 130 that is provided along the longitudinal direction of the scintillation fiber bundle 20. The longitudinal direction of the scintillation fiber bundle 20 is defined as the first direction. The x direction in FIG. 6 is the first direction.

  The scintillation fiber bundle 20 is formed by bundling a plurality of scintillation fibers 10. The light propagated through each scintillation fiber 10 enters the photomultiplier tubes 30 and 30 ′ provided at both ends of the scintillation fiber bundle 20.

  Here, the principle of radiation measurement using the scintillation fiber 10 is the same as in the previous embodiment.

  Details of the auditory unit 130 provided along the scintillation fiber bundle 20 which is a bundle of scintillation fibers 10 as described above will be described. FIG. 7 is a view showing the relationship between the scintillation fiber bundle 20 and the auditory unit 130 of the radiation perception apparatus 1 according to the embodiment of the present invention.

  In FIG. 7, a part of the scintillation fiber bundle 20 and the auditory unit 130 are shown enlarged.

  The auditory unit 130 has a plurality of piezoelectric buzzers 150 arranged in a straight line with a first direction (x direction) parallel to the longitudinal direction of the scintillation fiber bundle 20. Such a piezoelectric buzzer 150 is provided on the base 140, and its sound generation is controlled by the sound generation control unit 95.

  In the present embodiment, the piezoelectric buzzer 150 is used as the sound generation unit, but any other sound generator such as a piezoelectric buzzer can be used.

In this embodiment, it is assumed that m piezoelectric buzzers 150 are arranged in the first direction (x direction). In FIG. 7, the nth piezoelectric buzzer 150 in the first direction (x direction) is assumed. It shows a state. The number of the piezoelectric buzzers 150 arranged in the first direction (x direction) may be provided over the length of the scintillation fiber bundle 20, and is not particularly limited.

  When the scintillation fiber 10 detects radiation of the measurement object in the environment, it propagates through the scintillation fiber 10 and reaches the photomultiplier tubes 30 and 30 ′ provided at both ends of the scintillation fiber 10.

  Each photomultiplier tube 30, 30 ′ converts and amplifies the optical signal generated by the scintillation fiber 10 into an electrical signal. The preamplifiers 40 and 40 'amplify signals from the photomultiplier tubes 30 and 30' into electric signals.

  The CFD 50, 50 '(also referred to as "signal waveform pre-processing device") performs signal waveform pre-processing for improving the time resolution of the electrical signal amplified by the preamplifiers 40, 40'.

  The delay device 60 adjusts the time interval between the start signal and the stop signal for the signals from the CFDs 50 and 50 '.

  In the TAC 70 (also referred to as “time wave height converter”), input time difference wave height conversion for converting the signal from the delay device 60 into a magnitude of the output is performed.

  Further, the output signal from the TAC 70 (also referred to as “multiple wave height analyzer”) is classified according to the intensity of the signal.

  From the TAC 70, detection position information relating to which position of the scintillation fiber 10 the radiation has entered and radiation dose rate information relating to what the radiation dose is are output to the sound generation control unit 95. The

  The sound generation control unit 95 controls whether or not the piezoelectric buzzer 150 arranged in the first direction (x direction) is caused to sound according to the detected position of the radiation. That is, in the auditory unit 130, the piezoelectric buzzer 150 disposed in the first direction (x direction) serves as a notification unit that indicates in which position of the scintillation fiber 10 the radiation is incident.

  The sound generation control unit 95 can also control the volume of the piezoelectric buzzer 150 according to the detected radiation dose rate. That is, the higher the dose rate of the detected radiation, the greater the volume of the piezoelectric buzzer 150.

  In addition, the sound generation control unit 95 can control the frequency of the piezoelectric buzzer 150 according to the detected radiation dose rate. For example, the higher the dose rate of the detected radiation, the higher the frequency of the piezoelectric buzzer 150.

The sound generation control of the piezoelectric buzzer 150 by the sound generation control unit 95 will be described with reference to FIG. As shown in FIG. 7, when radiation enters the x _n (n = _{1 to} m) section of the scintillation fiber 10 in the scintillation fiber bundle 20, in the radiation perception apparatus 1 according to the present invention, the first direction In the (x direction), the nth piezoelectric buzzer 150 is sounded.

  When the sound generation control unit 95 is set to a mode for controlling the volume of the piezoelectric buzzer 150, the sound generation control unit 95 controls the volume of the nth piezoelectric buzzer 150 according to the radiation dose rate.

When the sound generation control unit 95 is set to a mode for controlling the frequency of the piezoelectric buzzer 150, the sound generation control unit 95 controls the frequency of the nth piezoelectric buzzer 150 according to the radiation dose rate.

  As described above, in the radiation perception apparatus 1 according to the present invention, which position and what dose rate can be indicated by the auditory unit 130 provided along the scintillation fiber bundle 20.

  As described above, the radiation perception apparatus 1 according to the present invention includes a plurality of sound generating portions (piezoelectric buzzers 150) arranged in the first direction parallel to the longitudinal direction of the scintillation fiber 10. According to the radiation perception apparatus 1, the dose rate distribution can be easily and intuitively grasped.

  Moreover, according to the radiation perception apparatus 1 according to the present invention, the dose rate distribution on the line is sounded at the measurement position, so that anyone can instantaneously confirm the intensity of the dose rate and can safely Ensuring the safety and notification of danger can be easily communicated to surrounding workers. Also, monitoring of decontamination and the like makes it possible to instantly identify the location and quickly and accurately find the decontamination required location. There is no indirect trouble of confirming the dose rate position distribution on the display or confirming the target location at the measurement position, and the complexity and mistakes of location identification are greatly reduced.

  In particular, the dose disposal distribution of the accident-derived waste disposal facility and its storage facility fluctuates from moment to moment due to loading / unloading sorting, etc. while moving. For this reason, it is necessary to constantly monitor the dose rate at many points such as the boundary of the site, the boundary of the radiation control area, the boundary of the restricted area within the control area, and the workers at the work site can immediately grasp the dose rate at the site. This is very effective in managing occupational safety and environmental safety.

  In the present specification, the radiation perception apparatus 1 according to the first to third embodiments has been described independently. For example, the LED unit 115 is used to visualize the dose rate distribution. It is also possible to visualize and auralize the dose rate distribution by combining the embodiment with the third embodiment using the piezoelectric buzzer 150 to auralize the dose rate distribution.

  As described above, the radiation perception apparatus 1 according to the first to third embodiments can be arbitrarily combined to form one embodiment, and the radiation perception apparatus 1 derived by such a combination is used. Are also within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Radiation perception apparatus 10 ... Scintillation fiber 11 ... Core 12 ... Cladding 14 ... Cone 20 ... Scintillation fiber bundle 30, 30 '... Photomultiplier tubes 40, 40 '... Preamplifier 50, 50' ... CFD (signal waveform pre-processing device)
60 ... delay device 70 ... TAC (time wave height converter)
80 ... MCA (Multiple Wave Height Analyzer)
90 ... Light emission control unit 95 ... Sound generation control unit 100 ... Display unit 110 ... Base 115 ... LED (light emitting diode) unit 120 ... LED (light emitting diode)
130 ... Auditory part 140 ... Base 150 ... Piezoelectric buzzer (sound generator)

Claims (9)

A scintillation fiber that detects the radiation of the measurement object in the environment;
A photomultiplier tube that converts and amplifies the optical signal generated by the scintillation fiber into an electrical signal;
A preamplifier for amplifying a signal from the photomultiplier tube into an electrical signal;
A signal waveform pre-processing device that performs signal waveform pre-processing for improving the time resolution of the electrical signal amplified by the preamplifier;
A delay device for adjusting a time interval between a start signal and a stop signal, from the signal waveform pre-processing device;
A time wave height converter in which an input time difference wave height conversion is performed to convert the signal from the delay device into a time interval and an output magnitude; and
In a radiation perception apparatus comprising: a multi-wave height analyzer that classifies an output signal from the time wave height converter according to a signal intensity; and a hearing unit that auralizes the output signal from the multi-wave height analyzer. ,
The auditory part comprises a plurality of sounding parts arranged in a first direction parallel to the longitudinal direction of the scintillation fiber. The radiation perception apparatus according to claim 1, wherein a volume of the sound generation unit is controlled in accordance with a detected radiation dose rate. The radiation perception apparatus according to claim 1, wherein the frequency of the sound generation unit is controlled in accordance with a detected dose rate of radiation. And a display unit for visualizing an output signal from the multi-wave height analyzer,
4. The radiation perception according to claim 1, wherein the display unit includes a plurality of light emitting units arranged in a first direction parallel to a longitudinal direction of the scintillation fiber. apparatus. The radiation perception apparatus according to claim 4, wherein the light emission intensity of the light emitting unit is controlled according to the detected radiation dose rate. The radiation perception apparatus according to claim 4, wherein the color of the light emitting unit is controlled in accordance with a detected dose rate of radiation. 5. The display unit includes a plurality of light emitting units arranged in a matrix in a first direction parallel to a longitudinal direction of the scintillation fiber and a second direction perpendicular to the longitudinal direction. Radiation perception device. The radiation perception apparatus according to claim 7, wherein whether or not the light emitting unit arranged in the first direction is caused to emit light is controlled according to the position of the detected radiation. The radiation perception according to claim 7 or 8, wherein whether or not the light emitting unit arranged in the second direction is caused to emit light is controlled according to a detected radiation dose rate. apparatus.

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