JP2010071979A - Radiation measuring device and radiation measurement training system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a training of radiation measurement without using actual radiation source. <P>SOLUTION: In pseudo-radiation sources 12, 14, a radio wave can be generated instead of radiation. In a training mode, a radiation measuring device 10 receives the radio wave from the pseudo-radiation sources 12, 14. and calculates a pseudo-measured value from reception intensity. The pseudo-measured value is displayed on a display 36 instead of real measured value. Without using radiation source, the training of the radiation measurement can be performed. In the radio wave, the information, such as, kinds of rays, or energy can be included. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radiation measurement apparatus and a radiation measurement training system, and more particularly to a technique for training the operation of the radiation measurement apparatus.

  As a radiation measuring apparatus, a survey meter that measures an air dose rate, a personal dosimeter for personal exposure management, and the like are known. Such a radiation measurement apparatus is routinely used in nuclear power plants, nuclear fuel handling facilities, hospitals handling radioisotopes, and the like. On the other hand, recently, a radiation measuring device is being constantly installed in a fire department, a police station and other local government organizations. For example, when a fire breaks out at a nuclear power plant, radiation measurement is required to ensure the safety of dispatched staff. However, such persons are generally not familiar with the operation of the radiation measuring apparatus. Alternatively, even if the knowledge is sufficient, operations are not performed on a daily basis, which may cause confusion during actual use. Therefore, it is required to regularly perform operation training of the radiation measuring apparatus. In addition, even a person who works in a radiation handling facility may be obliged to train, and there may be a training of operation of the radiation measuring apparatus as part of new employee education.

  Patent Document 1 below discloses an automatic test apparatus for a radiation monitoring apparatus. In this apparatus, a pseudo signal from a test signal generator is input to the radiation monitoring apparatus, and the actual alarm operation is thereby tested. However, the device does not simulate the radiation radiated through the space, and the configuration of the device is not for training the operation but for operation confirmation. .

  The following Patent Document 2 discloses a training facility that simulates radiation distribution in a management area. Specifically, one or more radio wave transmitters are installed in a building that simulates a work space, and an operator carries a receiver that receives radio waves from a radio wave generator, In the case of work such as training equipment that simulates radiation equipment, the strength and reception time of radio waves received by the receiver are converted into radiation intensity and exposure time. Based on them, the cumulative exposure dose is displayed, and when it reaches the danger zone, it is controlled so that an alarm is generated. In this training facility, the equipment carried by the operator is merely a receiver that does not have a radiation measurement function, not the radiation measurement apparatus itself, so even if radiation management training can be performed, the radiation measurement apparatus itself is trained. Cannot be performed.

Japanese Patent Laid-Open No. 10-260262 JP 59-29284 A

  Conventionally, a sealed radiation source is used for operation training of the radiation measuring apparatus. However, storage management of the radiation source is complicated, especially for those who have little knowledge and experience about radiation. Although it is conceivable that the sealed radiation source is not permanently installed and is temporarily rented from a contractor for each training, and it is possible to use it, but it becomes impossible to train quickly when necessary. In addition, even if training using a sealed radiation source is actually necessary, it is better to have a mechanism that can perform preliminary training prior to or supplementarily.

  In the configuration described in Patent Document 2, the radiation measuring apparatus itself is not equipped with a training function, and thus there is a problem that the operation of the radiation measuring apparatus cannot be trained.

  An object of the present invention is to be able to train the operation of a radiation measuring apparatus without using an actual radiation source.

  Another object of the present invention is to create a situation close to actual radiation measurement so as to increase the outcome of training.

  A radiation measurement apparatus according to the present invention includes a radiation detector that detects radiation, an actual measurement value calculation unit that calculates an actual measurement value based on a detection signal output from the radiation detector, and a pseudowire used in a training mode. A reception unit that receives a pseudo wave that is not radiation from a source; a pseudo measurement value calculation unit that calculates a pseudo measurement value based on a reception signal output from the reception unit; and the radiation measurement value in an actual measurement mode; And a display unit for displaying the pseudo measurement value in the training mode.

  According to the above configuration, in the training mode, a pseudo wave (non-radiation) related to the air propagation from the pseudo radiation source is received by the receiving unit, and the pseudo measurement value is calculated based on the received signal and displayed. The That is, in the same situation as radiation measurement, it is possible to actually measure a spatially propagated wave close to radiation without using an actual radiation source, and perform radiation measurement training through such a process. The training may include, for example, a movement operation of the portable apparatus main body or the radiation detection unit, a search for identifying a contamination source, adjustment of operation conditions, reading of display contents, and the like. The pseudo wave is preferably a radio wave, but other than that, a magnetic field, a sound wave, and the like can be considered. Similar to the case of radiation measurement, if the signal level varies according to the distance, the same feeling as in the case of actual radiation measurement can be obtained. In order to prevent misidentification, it is desirable that the training mode is clearly indicated.

  Preferably, the pseudo measurement value calculation unit calculates the pseudo measurement value based on the reception intensity of the pseudo wave, and the magnitude of the pseudo measurement value according to a distance from the pseudo radiation source to the radiation measurement apparatus. Fluctuates. If the received intensity is inversely proportional to the square of the distance, a measurement situation similar to that of a typical radiation measurement can be created.

  Preferably, in the display unit, the pseudo measurement value is updated at the same cycle as the display update cycle of the actual measurement value. It is desirable to make the display mode and display contents as similar to those of actual radiation measurement as much as possible.

  Preferably, the reception unit receives the pseudo wave at a predetermined reception cycle and outputs the intensity data of the pseudo wave, and the pseudo measurement value calculation unit includes a plurality of intensities output at the predetermined reception cycle. The pseudo measurement value is calculated by averaging the data. In the case of radiation measurement, since an averaging process based on a time constant is generally applied, it is desirable to execute a calculation process corresponding to the averaging process. That is, preferably, the pseudo measurement value calculation unit has a calculation condition corresponding to a response characteristic of the actual measurement value calculation unit. Preferably, the pseudo wave is a radio wave, and the receiving unit has an antenna for receiving the radio wave. Radio waves can be easily generated and handled easily. Moreover, if it is a radio wave, it is easy to transmit information by encoding or modulation. Furthermore, multiplex transmission is also possible. A system can be easily constructed if a known communication method is used as it is. In general, it is difficult to perform training using a plurality of radiation sources, but if a pseudo radiation source is used, simultaneous measurement of a plurality of radiations can be easily simulated.

  Preferably, the pseudo wave includes at least one of identification information of the pseudo radiation source, line type information of the pseudo radiation source, and energy information about the pseudo radiation source, and the reception unit includes Information is extracted from the pseudo wave, and the pseudo measurement value calculation unit calculates the pseudo measurement value based on the information extracted from the pseudo wave. If information is transmitted, it is possible to simulate measurement conditions with different types of radiation and energy.

  A pseudo-ray source according to the present invention is a pseudo-ray source used together with a radiation measuring apparatus equipped with a training function for receiving a pseudo-wave and displaying a pseudo-measured value based on the intensity thereof. Information generating means for generating attribute information including at least one of information, line type information, and energy information, and a transmitter that emits a pseudo wave including the attribute information in the air.

  Preferably, the pseudo-ray source controls the operation of the pseudo-ray source based on the receiving unit that receives a control signal from the radiation measuring apparatus equipped with the training function and the control signal received by the receiving unit. A control unit. According to this configuration, the operation of the pseudo-ray source can be controlled by the wireless method from the apparatus main body side. Alternatively, mutual authentication or the like can be performed. Preferably, it includes means for causing a variation in the transmission power of the pseudo wave. According to this configuration, the stochastic fluctuation of radiation can be simulated.

  The system according to the present invention is a training system composed of a pseudo-ray source and a radiation measuring apparatus equipped with a training function, the pseudo-ray source having means for generating a pseudo wave other than radiation, and the training A radiation measurement apparatus equipped with a function includes: a reception unit that receives the pseudo wave; a pseudo measurement value calculation unit that calculates a pseudo measurement value based on a reception signal output from the reception unit; and the pseudo measurement value is displayed. And a display unit.

  The present invention relates to a system including a plurality of radiation measurement devices, wherein each of the radiation measurement devices includes a radiation detector that detects radiation, and an actual measurement value that calculates an actual measurement value based on a detection signal output from the radiation detector. A calculation unit, a means for controlling a pseudo wave to be transmitted when the self is designated as a pseudo-ray source in the training mode, and the pseudo wave when the self is designated as a training target in the training mode. Means for calculating a pseudo measurement value based on the received signal, displaying the actual measurement value in the actual measurement mode, and when the self is designated as a training target in the training mode, the pseudo measurement value is displayed. And a display unit for displaying the measurement value.

  According to the above configuration, when there are two radiation measuring apparatuses, the first radiation measuring apparatus can be virtually used as a pseudo-ray source, and the second radiation measuring apparatus can be used as a training target. That is, a training function and a radiation source function are incorporated in advance in the radiation measuring apparatus. Since it is not necessary to prepare a dedicated pseudo-ray source, training can be performed easily. It is also possible to perform the training using the first radiation measuring apparatus after performing the training using the second radiation measuring apparatus and then reversing the role. Training can be performed not only when the first radiation measurement apparatus and the second radiation measurement apparatus are in the same specification relationship but also in a different specification relationship.

  Preferably, it includes a management device for performing data communication with the plurality of radiation measurement devices, each of the radiation measurement devices has a communication unit for performing data communication with the management device, In each of the radiation measurement devices, the transmission of the pseudo wave and the reception of the pseudo wave are performed using the communication unit. According to this configuration, since the pseudo-ray source operation or the training operation can be performed using the communication function prepared for data communication, it is possible to avoid the complication of the configuration, and to perform advanced transmission and reception of the pseudo wave. It is also easy to use the data transmission function. The communication unit generally includes a transmission / reception unit and an antenna. It is desirable to install the antenna so that it is not obstructed during normal operation and isotropic directivity is realized as much as possible.

  Preferably, a first radiation measurement device designated as a pseudo-ray source in the training mode among the plurality of radiation measurement devices, and a first radiation measurement device designated as a training object in the training mode among the plurality of radiation measurement devices. Prior to the transmission / reception of the pseudo wave between the two radiation measurement apparatuses, authentication data communication is executed. Data communication for authentication establishes a data link mutually using a mutual communication part. When a large number of radiation measuring apparatuses coexist, a cooperating pair that operates in the training mode can be specified, and interference and malfunction can be avoided.

  Preferably, among the plurality of radiation measurement devices, the first radiation measurement device designated as the pseudo-ray source in the training mode, and among the plurality of radiation measurement devices, designated as the first training object in the training mode. The first authentication data communication is executed with the second radiation measurement apparatus prior to the transmission / reception of the pseudo wave, and the pseudo radiation source is designated in the training mode among the plurality of radiation measurement apparatuses. Prior to the transmission / reception of the pseudo wave between the first radiation measurement device and the third radiation measurement device designated as the second training object in the training mode among the plurality of radiation measurement devices. Second authentication data communication is executed. According to this configuration, training can be performed with a relationship of 1 (one pseudo-ray source) to many (a plurality of training targets). Of course, the training may be performed with a relationship of many (a plurality of pseudo-ray sources) to one (one training object). According to the above configuration, the data link can be individually established between the pseudo-ray source and the plurality of training apparatuses, and different pseudo waves can be transmitted to the respective training apparatuses.

  The radiation measurement apparatus according to the present invention includes a radiation detector that detects radiation, an actual measurement value calculation unit that calculates an actual measurement value based on a detection signal output from the radiation detector, and a self-ray source in the training mode. Means for controlling so that a pseudo wave is transmitted, and when the self is designated as a training target in the training mode, the pseudo wave transmitted from another radiation measurement device is received. Means for calculating a pseudo measurement value based on the received signal, and displaying the actual measurement value in the actual measurement mode, and when the self is designated as a training object in the training mode, the pseudo measurement value is displayed. And a display unit for displaying. A training system is constructed by linking a plurality of such radiation measuring apparatuses to each other.

  As described above, according to the present invention, the operation of the radiation measuring apparatus can be trained without using an actual radiation source. Alternatively, it is possible to create a situation close to actual radiation measurement to improve the training results.

It is a block diagram which shows the radiation measurement system carrying the training function concerning this invention. It is an external view which shows a pseudo ray source. It is a figure which shows the content of a transmission signal. It is a figure which shows an example of a random process. It is a figure for demonstrating the received signal process corresponding to a display update rate. It is a flowchart which shows the basic operation example in training mode. It is a figure which shows the flowchart containing the automatic switching process from training mode to measurement mode. It is a figure for demonstrating the production | generation of the trigger signal for mode switching in a signal processing circuit. It is a block diagram which shows the system configuration | structure in the case of performing operation training by making a some radiation measurement apparatus cooperate.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG. 1 shows a preferred embodiment of a radiation measurement system according to the present invention, and FIG. 1 is a block diagram showing the overall configuration thereof. The system according to the present embodiment includes a radiation measuring apparatus 10 and a plurality of pseudo-ray sources 12 and 14. The pseudo-ray sources 12 and 14 are used when training the operation of the radiation measuring apparatus 10.

  The radiation measuring apparatus 10 will be described. The radiation measuring apparatus 10 is, for example, a personal dosimeter or a survey meter. The radiation measuring apparatus 10 is configured as a portable apparatus, and has a battery 46 as a power source. In the configuration shown in FIG. 1, the radiation measurement apparatus 10 has a function of detecting γ rays and neutrons. Of course, a single radiation (α ray, β ray, γ ray, neutron) may be detected.

  The sensor 16 shown in FIG. 1 is a semiconductor detector for detecting γ rays. The sensor 18 is a semiconductor detector for detecting neutrons. The sensitive surface of the sensor 18 is provided with a transmutation layer 18A for detecting neutrons as charged particles (α particles). Signal processing circuits 20 and 22 are provided downstream of the sensors 16 and 18. The signal processing circuits 20 and 22 have known circuits such as a preamplifier and a wave height discriminator. Signals output from the signal processing circuits 20 and 22 are input to the counters 24 and 26.

  In the present embodiment, the microcomputer (microcomputer) 31 includes the counters 24 and 26, the arithmetic unit 32, the memory 33, and the like. The counter 24 is a counter for counting γ rays. The counter 26 is a counter for counting neutrons. The calculation unit 32 has a function of calculating a γ-ray dose (dose rate) and a neutron dose (dose rate) based on the count values of the counters 24 and 26. A dose equivalent may be calculated. They are all actual measurements. Those actual measurement values are displayed on the display 36. The display 36 is a liquid crystal display, an analog meter, a composite display, or the like.

  In the present embodiment, the calculation unit 32 has a function of calculating a pseudo measurement value (pseudo dose) based on the detection result of the pseudo radiation in the training mode. The pseudo measurement value is displayed on the display 36. That is, the display 36 displays the actual measurement value as the radiation measurement result in the normal actual measurement mode (measurement mode), and displays the pseudo measurement value instead of the actual measurement value in the training mode.

  The operation panel 34 is connected to the microcomputer 31 and can use the operation panel 34 to select an operation mode, change measurement conditions, and the like. The operation panel 34 includes various knobs and switches. The LED 38 and the buzzer 40 are means for generating an alarm when the radiation measurement result is an abnormal value. During the execution of the training mode, when the dose suddenly increases and the mode is automatically switched, that is, when the training mode is forcibly terminated and the actual measurement mode is automatically executed, the LED 38 is turned on, and The buzzer 40 may be operated. That is, it is desirable to notify the user of the mode change when the mode is automatically changed.

  The memory 33 is configured as a non-volatile memory, and the actual measurement values can be stored on the memory 33 in chronological order. Moreover, you may make it preserve | save a pseudo measurement value in a time-sequential order as needed. In particular, in the present embodiment, when radiation measurement is continuously executed in the training mode, the actually measured value obtained is stored in the memory 33, and after the training mode ends, the radiation measured during the training is stored. The dose etc. can be read out.

  The receiver 42 includes an antenna 44, and radio waves from the pseudo-ray sources 12 and 14, which will be described in detail below, are received by the antenna 44, and a reception signal generated thereby is processed by the receiver 42. In the present embodiment, the receiver 42 particularly has a function of measuring the electric field strength of the received signal and a function of extracting information contained in the received signal. The extracted information and electric field strength information are sent to the calculation unit 32. That is, in the training mode, the pseudo-ray sources 12 and 14 are used, which is regarded as the same as an actual radiation source, and receives radio waves instead of radiation, thereby operating the radiation measuring apparatus 10. It is possible to perform training and reading training of display contents.

  The pseudo-ray sources 12 and 14 have the same configuration, and the configuration will be described below as a representative of the pseudo-ray source 12. The pseudo-ray source 12 is a portable small part having a form that is easy to carry, and has a coin-type form as will be described later with reference to FIG. 2, and is installed on a floor surface or a table, for example. Is done.

  The pseudo-ray source 12 has a battery 58 as a power source, that is, the pseudo-ray source 12 can be installed at an arbitrary location. The signal processor 50 functions as a signal generator at the time of transmission, and a transmission signal including certain information is given to the transmitter 54. The transmitter 54 functions as a communication unit in the same manner as the receiver 42 described above, converts an input transmission signal into a radio wave signal, and outputs the signal to the antenna 56. Then, the radio wave 100A as pseudo radiation is emitted from the antenna 56, and the radio wave 100A is received by the antenna 44 described above. The input device 52 is an input device for setting operating conditions of the signal processor 50. For example, the function of the pseudo-ray source 12 can be switched using the input device 52. It is also possible to remotely control the operating conditions of the pseudo-ray source 12 from the radiation measuring apparatus 10 side by providing the receiver 42 with a further transmitter function while providing the transmitter 54 with a further receiver function. It is. It is also possible to perform mutual authentication between the radiation measurement apparatus 10 and the pseudo-ray source 12 or to exchange information between them. Other than that, it is conceivable to send a control signal from the radiation measuring apparatus 10 side to designate the type of radiation or to designate the intensity, and by such control, frequency switching for preventing interference is performed. Also good.

  The pseudo-ray source 12 is installed on a floor surface, for example, while the radiation measuring apparatus 10 is held by a person who performs training. The position and orientation of the radiation measurement device 10 are changed and operated so that the radio wave radiated from the pseudo-ray source 12 is received well by the radiation measurement device 10, that is, as if the detection intensity of radiation is further increased. By adjusting the operating conditions of the apparatus using the panel 34, it becomes possible to perform radiation measurement training with the same operational feeling as actual radiation measurement.

  In the present embodiment, the radiation measurement apparatus 10 has two radiation measurement functions, that is, a γ-ray measurement function and a neutron measurement function. Correspondingly, a γ-ray pseudo-ray source 12 and a neutron pseudo-ray source 14 are provided, and radio waves 100A and 100B are radiated independently from the two pseudo-ray sources. The radio waves 100A and 100B are received by the antenna 44, and the receiver 42 processes the received signal for each radio wave. As will be described later, each radio wave contains certain information. By recognizing the contents of the embedded information, the role of each pseudo-ray source can be easily recognized. It is possible to evaluate the electric field strength of each radio wave independently. In the configuration shown in FIG. 1, the calculation unit 32 calculates pseudo doses for both γ rays and neutrons based on the electric field strengths of two radio waves, and the respective pseudo doses are displayed on the display 36. In general, training using a plurality of radiation sources or neutron measurement training is difficult, but in this embodiment, since an actual radiation source is not used, there is an advantage that such training can be easily performed.

  FIG. 2 shows an example of the appearance of the pseudo-ray sources 12 and 14 shown in FIG. In the illustrated configuration, each pseudo-ray source 12, 14 has a coin shape, and radio waves are radiated isotropically from an antenna 56 provided on the upper surface thereof. Since the electric field strength of radio waves is generally inversely proportional to the square of distance, it is possible to create an intensity function similar to that of radiation measurement. Of course, the radiation measuring apparatus can be trained using only a single pseudo-ray source.

  In FIG. 3, information included in the radio wave 100A radiated from the pseudo-ray source 12 is shown as a conceptual diagram. The radio wave 100A, that is, the transmission signal includes ID information 60 that is an identifier of the pseudo-ray source and management data 62. The management data 62 is information such as the type of line type and radiation energy, for example. That is, by specifying the line type and energy as attribute data, it is possible to generate a simulated detection signal based on the information at the stage of electrical signal processing. The intensity data 64 added to the information is added by the receiver 42 shown in FIG. That is, the intensity data corresponds to the intensity of radiation, and a pseudo measurement value can be calculated by performing an operation based on the intensity data. Incidentally, in the present embodiment, two types of pseudo-radiation are generated using the two pseudo-ray sources 12, 14, but two types of pseudo-radiation may be generated from a single pseudo-ray source. By appropriately changing the contents of the management data shown in FIG. 3, various types of information can be embedded depending on the purpose of the training. However, as the simplest example, there is a method of using the intensity of a simple radio wave that is not embedded with information by modulation, coding, etc., which can also be an embodiment of the present invention.

  FIG. 4 shows the intensity of the transmission wave (radio wave) represented on the time axis. In this embodiment, random processing of transmission power is applied on the pseudo-ray source side, that is, it is configured not to set steady transmission power but to perform pseudo-random processing. Has been. In actual radiation measurement, there is a tendency for the count value to fluctuate violently, so by simulating it, it is intended to realize the same display content as the actual display content during training of the radiation measurement device. is there. Such random processing can be performed on the pseudo-ray source side, can also be realized in the receiver, and can also be performed in the microcomputer shown in FIG.

  FIG. 5 shows the contents of signal processing in the training mode. (A) shows the display update rate when the dose or dose rate is displayed. This indicates the rate in the actual measurement mode, and the same rate is set also in the training mode. Here, one period t is, for example, 0.5 seconds, or 1 second. That is, the display contents are sequentially updated at regular intervals. This is because the visibility of the user is lowered when the display contents are updated at a very high speed. On the other hand, (B) shows a sampling rate for radio waves. Here, Δt which is a sampling period is, for example, 20 ms. In this embodiment, a large number of samplings are performed per cycle of the display update rate, and a large number of received signal strength (electric field strength) values obtained by the multiple samplings are averaged. The obtained value is displayed as the indicated value (pseudo dose value). In actual radiation measurement, a moving average process based on a time constant is generally applied. Therefore, in this embodiment, display contents are manipulated so that similar response characteristics can be obtained. That is, the indicated value is calculated and displayed so that the same time constant (response characteristic) as the time constant set in actual measurement is realized.

  Although FIG. 1 shows a radiation measurement apparatus that actually performs radiation measurement, it is possible to configure a dedicated training apparatus by excluding the unit indicated by reference numeral 30 in FIG.

  FIG. 6 shows a basic operation content of the radiation measuring apparatus shown in FIG. 1 as a flowchart. In S101, the operation mode is selected by the user. When the actual measurement mode is selected, radiation measurement and display of the measurement result (actual measurement value) are executed in S102. The process of S102 is repeatedly executed until it is determined in S103 that the actual measurement mode is finished.

  On the other hand, when the training mode is selected in S101, pseudo radiation is generated in S104. Specifically, the pseudo-ray source is installed at a predetermined location and the power supply is turned on. The operation is performed by the user. In S105, the pseudo radiation is observed in the radiation measuring apparatus, and the pseudo measurement value as the measurement result is displayed. And the process of S105 is repeatedly performed until the end of training mode is determined in S106.

  As described above, according to the present embodiment, the operation and reading of the radiation measurement apparatus can be performed using a pseudo radiation source that does not use an actual radiation source, that is, a pseudo radiation source that generates radio waves that substitute for radiation. There is an advantage that can be trained. Therefore, since it is not necessary to permanently install a sealed radiation source for training, the complexity of radiation management is eliminated. Moreover, there is an advantage that the training can be executed promptly when the training is required. In this embodiment, since the intensity of the radio wave that is inversely proportional to the square of the distance is used, there is an advantage that a measurement environment similar to an actual radiation measurement situation can be realized. Of course, various measurement conditions may be simulated by giving the antenna directivity.

  By the way, when an abnormality occurs in the dose rate during execution of the training mode, that is, when the dose suddenly increases, it is desirable to quickly end the training mode and shift to the measurement mode. FIG. 7 is a flowchart showing the operation contents that meet such a request. The operation content shown in FIG. 7 can be realized by the function of the calculation unit 32 shown in FIG.

  In S201, the operation mode is determined, and if it is the actual measurement mode, the radiation measurement is started in S202 as described above, and the actual measurement value is displayed. Then, the process of S202 is repeatedly executed until it is determined in S203 that the actual measurement mode is finished.

  On the other hand, when the training mode is selected in S201, radiation measurement is started in S204. That is, it acts as a training mode for the user, and actually performs radiation measurement in parallel inside the apparatus. In S205, the operation of the timer A is started, and in S206, the operation of the timer B is started.

  In S207, radio waves are generated in the pseudo-ray source, that is, pseudo radiation is generated. In S208, a pseudo measurement value due to reception of radio waves is displayed. That is, actual training starts from this stage.

  In S209, it is determined whether or not the radiation level has increased. In this case, it may be determined that an abnormality has occurred when the radiation level has increased for a certain period of time or more, and the occurrence of the abnormality may be determined with a single increase in the radiation level. If it is determined that the radiation level has not increased, it is determined in S201 whether or not there has been no operation for a certain period of time based on the value of the timer A. Since it is necessary to automatically end the training mode when the device is left in the training mode, this S201 is provided. If any operation is performed within a certain time, the timer A is reset in S211 and the timer A starts counting again.

  In S212, based on the value of timer B, it is determined whether or not reception of radio waves has not been established within a certain period of time, that is, whether or not a radio wave reception has not been established for a certain period of time. This is also a determination step for dealing with forgetting to end the training mode. If a valid radio wave is received within a certain time, the value of timer B is reset in S213, and timer B starts counting again. In S214, it is determined whether or not to end the training mode. When maintaining the training mode, each process after S208 is repeatedly performed.

  If it is determined in S209 that the dose has increased, the actual measurement value at that time is displayed in S215. That is, the abnormal content is notified to the user. At the same time, automatic switching of the mode from the training mode to the actual measurement mode is executed, and a message to that effect is displayed. In that case, you may make it operate LED and a buzzer. In other words, it is desirable to reliably notify the user of the state of the mode change in some form. It is also desirable to display to the user whether the training mode or the actual measurement mode is easy even in normal operating conditions.

  When S215 is executed, S202 is executed next, that is, the processing routine is actually switched from the training mode to the actual measurement mode.

  Therefore, even if the training mode is selected by mistake under circumstances where radiation measurement must actually be performed, the training mode is automatically terminated if the dose increases in S209. As a result, the reliability of the apparatus and the safety of measurement can be improved. By the way, when it is determined in S210 that no operation has been performed within a certain time, and when it is determined in S212 that reception of radio waves has not been established within a certain time, the training mode is forcibly terminated. It will be. In that case, the transition to the actual measurement mode may be automatically performed as necessary. If the training mode was selected by mistake in actual measurement, but the dose does not increase, the absence of the quasi-ray source is determined in S212, and the training mode is automatically terminated. become. As a result, the user can recognize the situation and execute the actual measurement mode. Alternatively, when it is determined in S212 that reception has not been established for a certain period of time, the actual measurement mode may be automatically executed. In any case, there is an advantage that highly reliable training operation and actual measurement operation can be realized by applying error processing from various viewpoints.

  In the embodiment shown in FIG. 1, the calculation unit 32 determines the dose increase based on the count values of the counters 24 and 26. However, as shown in FIG. The operation may be stopped, and trigger signals 110A and 110B indicating a dose increase may be output from the wave height discriminating circuit or the like in the signal processing circuits 20 and 22.

  In the above embodiment, the mode is automatically changed when an increase in dose is recognized for either one of the dose of γ rays and the dose of neutrons. It is also possible to perform the operation. However, according to the operation content of the present embodiment, dose abnormality for each radiation is independently evaluated, and if an abnormality is recognized on one side, the operation of the entire apparatus is switched to actual measurement, so that more reliable measurement is possible. There is an advantage that can be performed.

  In the above embodiment, radio waves are used as pseudo waves. However, magnetic fields, ultrasonic waves, and the like can be used instead. Since the detection level of such a wave also varies in inverse proportion to the distance, it is possible to simulate radiation measurement for a radiation source.

  FIG. 9 shows a configuration example of a system according to the present invention. This system includes a plurality of radiation measuring apparatuses 200 and 202 equipped with a training function, and a host computer 204 that functions as a management apparatus.

  Each of the radiation measuring apparatuses 200 and 202 has a radiation measuring function and a training function, and corresponds to the radiation measuring apparatus 10 (survey meter, personal dosimeter, etc.) shown in FIG. However, in addition to the function of being self-training target (training operation target), it also has a function of self-pseudo-ray source. In FIG. 1, the radiation measuring apparatus 200 is a training target here, and the radiation measuring apparatus 202 plays a role as a pseudo-ray source. Of course, it is possible to reverse the roles of both. The radiation measuring apparatuses 200 and 202 may be in the same model relationship with the same specification, or may be in different model relationships with different specifications.

  The radiation measuring apparatus 200 includes a control unit 206, a communication unit 208, a signal generator 210, and the like. Similarly, the radiation measuring apparatus 202 includes a control unit 212, a communication unit 214, a signal generator 216, and the like. The control units 206 and 212 are configured by the microcomputer 31 shown in FIG. 1 and have various arithmetic functions and control functions. In particular, the control units 206 and 212 execute control so that a pseudo signal is transmitted as a radio wave when the self apparatus is in charge of the pseudo-ray source in the training mode, and the self apparatus is a training target in the training mode. Is controlled to receive a pseudo signal transmitted from another device, calculate a pseudo measurement value based on the pseudo signal, and display the pseudo measurement value. Of course, the control units 206 and 212 perform control such as calculation and display of radiation measurement values (actual measurement values) in the actual measurement mode. The signal generators 210 and 216 generate a transmission signal for transmitting a pseudo wave as a radio wave when the self apparatus is in charge of the pseudo radiation source, that is, when an operation as a pseudo radiation source is designated. . However, when a simple sine wave is used as the pseudo wave, it is not necessary to provide the signal generators 210 and 216 specially.

  The communication units 208 and 214 are modules for performing data communication between the radiation measuring apparatuses 200 and 202 and the host computer 204 as a management apparatus. The data communication includes transmission of measurement data from the radiation measurement apparatuses 200 and 202 to the host computer 204 (see reference numerals 220 and 222), and control signals from the host computer 204 to the radiation measurement apparatuses 200 and 202 are transmitted. Includes transmission. The host computer 204 includes a communication unit 218 and also includes a control unit and the like, which are not illustrated. The radiation sensors and displays provided in the radiation measuring apparatuses 200 and 202 are also not shown.

  When the user designates the training mode for the radiation measuring apparatuses 200 and 202 or when a signal designating the training mode is sent from the host computer, one of the radiation measuring apparatuses 200 and 202 is simulated. Behaves as a radiation source and the other device operates as a training target. The division of roles may be specified by the user, or may be determined on the host computer side. A command to that effect may be sent from the apparatus to be trained to the apparatus serving as the pseudo-ray source, or vice versa.

  In the example shown in FIG. 9, the radiation measuring apparatus 202 is designated as a pseudo-ray source, and a pseudo wave 224 that simulates radiation is transmitted from the apparatus to the air. The pseudo wave 224 is received by the radiation measuring apparatus 200 to be trained, the intensity of the received signal is detected, and the intensity is converted into a measured value such as a radiation dose or a dose equivalent. The measured value is displayed on the display of the radiation measuring apparatus 200. At that time, operations such as changing the range, changing the time constant, and changing the display unit can be freely performed. Since the contents of the operation are immediately reflected in the display contents, it is possible to obtain an operation feeling similar to the actual measurement. In addition, if the radiation measuring apparatus 200 is moved in a situation where the radiation measuring apparatus 202 is left stationary, the measurement result varies depending on the positional relationship between the two, so that it is possible to train such a moving operation. .

  If necessary, intensity information, energy information, and line type information may be transmitted from the radiation measurement apparatus (pseudo-ray source) 202 to the radiation measurement apparatus (training target) 200. Conversely, a control signal may be sent from the radiation measurement apparatus 200 (training target) to the radiation measurement apparatus (pseudo-ray source) 202 to change the strength of the pseudo signal. The pseudo signal can be received by the host computer 204 to perform necessary maintenance.

  In the example shown in FIG. 9, one training device has a one-to-one relationship with one pseudo-ray source, but a one-to-many relationship or a many-to-one relationship may be established. . For example, since various facilities usually have a plurality of radiation measuring devices, one of them is operated as a pseudo-ray source, and a plurality of workers are operated by using a plurality of other radiation measuring devices. It is also possible to have a measurement training. In setting and operating the apparatus during training, voice guidance or the like for guiding the setting method or operation procedure may be provided, and at the same time, the operation content may be recognized and confirmed on the apparatus side. According to such a configuration, even a person who has little operation experience can smoothly train without error, so that the training effect can be enhanced.

  In order to establish the relationship between the radiation measuring apparatus as the pseudo-ray source and the radiation measuring apparatus as the training target, it is desirable to execute mutual authentication processing at an initial stage of communication between the two. That is, it performs data communication for authentication, and generally includes transmission processing of its own identifier and registration processing of such information. If mutual authentication or a data link is established, even if a radio wave is received from the third radiation measuring apparatus, it is possible to accurately identify only the radio wave from the counterpart pseudo-ray source. That is, interference and misunderstanding can be prevented. In the mutual authentication stage, two devices (cooperating pairs) that cooperate in the training mode may be brought close to each other.

  When operating a plurality of training objects using one pseudo-ray source, authentication may be performed individually between the pseudo-ray source and each training object. For example, after the first authentication data communication is performed between the pseudo-ray source and the first training device to establish communication between the first pair, the pseudo-wire source and the second training device You may make it establish communication between those 2nd pairs by performing 2nd data communication for authentication. According to such a configuration, it is possible to change the contents of the pseudo wave, that is, the line type, energy, etc. for each training target. Of course, the radio wave may be simply sent from the pseudo-ray source, and the radio wave may be received by an unspecified number of training subjects.

  DESCRIPTION OF SYMBOLS 10 Radiation measuring device, 12, 14 Pseudo-ray source, 16, 18 Sensor, 20, 22 Signal processing circuit, 24, 26 Counter, 32 Operation part, 36 Display, 42 Receiver, 44 Antenna, 50 Signal processor, 54 Transmitter, 56 antenna, 100A, 100B radio wave.

Claims (16)

A radiation detector for detecting radiation;
An actual measurement value calculation unit for calculating an actual measurement value based on the detection signal output from the radiation detector;
A receiver for receiving a pseudo-wave that is not radiation from the pseudo-ray source used in the training mode;
A pseudo measurement value calculation unit that calculates a pseudo measurement value based on the received signal output from the reception unit;
A display unit for displaying the radiation measurement value in the measurement mode, and the pseudo measurement value in the training mode;
A radiation measuring apparatus comprising: The apparatus of claim 1.
The pseudo measurement value calculation unit calculates the pseudo measurement value based on the reception intensity of the pseudo wave,
The radiation measurement apparatus, wherein the magnitude of the pseudo measurement value varies depending on the distance from the pseudo-ray source to the radiation measurement apparatus. The apparatus according to claim 1 or 2,
In the display unit, the pseudo measurement value is updated at the same cycle as the display update cycle of the actual measurement value. The device according to any one of claims 1 to 3,
The receiving unit receives the pseudo wave at a predetermined reception cycle and outputs the intensity data of the pseudo wave,
The pseudo measurement value calculation unit calculates the pseudo measurement value by averaging the plurality of intensity data output in the predetermined reception cycle.
A radiation measuring apparatus characterized by that. In the apparatus of any one of Claims 1-4,
The radiation measurement apparatus, wherein the pseudo measurement value calculation unit has a calculation condition corresponding to a response characteristic of the actual measurement value calculation unit. In the apparatus of any one of Claims 1-5,
The pseudo wave is a radio wave,
The receiver has an antenna for receiving the radio wave;
A radiation measuring apparatus characterized by that. In the apparatus of any one of Claims 1-6,
The pseudo wave includes at least one of identification information of the pseudo radiation source, line type information of the pseudo radiation source, and energy information about the pseudo radiation source,
The receiver extracts information from the pseudo wave,
The radiation measurement apparatus, wherein the pseudo measurement value calculation unit calculates the pseudo measurement value based on information extracted from the pseudo wave. A portable pseudo-radiation source used with a radiation measurement device equipped with a training function that receives a pseudo-wave and displays a pseudo-measured value based on its intensity,
Information generating means for generating attribute information including at least one of identification information of the pseudo-ray source, line type information, and energy information;
A transmitter for emitting a pseudo wave including the attribute information into the air;
A pseudo-ray source comprising: The apparatus of claim 8.
The pseudo-ray source includes a receiving unit that receives a control signal from a radiation measuring apparatus equipped with the training function;
A control unit for controlling the operation of the pseudo-ray source based on the control signal received by the receiving unit;
A pseudo-ray source comprising: The device according to claim 8 or 9,
A pseudo-ray source comprising means for causing variation in the transmission power of the pseudo-wave. A training system composed of a pseudo-ray source and a radiation measuring device equipped with a training function,
The pseudo-ray source has means for generating a pseudo-wave other than radiation;
The radiation measuring device comprises:
A receiving unit for receiving the pseudo wave;
A pseudo measurement value calculation unit that calculates a pseudo measurement value based on the received signal output from the reception unit;
A display unit for displaying the pseudo measurement value;
A radiation measurement training system comprising: In a system including a plurality of radiation measuring devices,
Each of the radiation measuring devices is
A radiation detector for detecting radiation;
An actual measurement value calculation unit for calculating an actual measurement value based on the detection signal output from the radiation detector;
Means for controlling a pseudo wave to be transmitted when self is designated as a pseudo ray source in the training mode;
Means for controlling the pseudo wave to be received when the self is designated as a training target in the training mode, and calculating a pseudo measurement value based on the received signal;
A display unit that displays the actual measurement value in the actual measurement mode, and displays the pseudo measurement value when the self is designated as a training target in the training mode;
A system characterized by including. The system of claim 12, wherein
A management device for performing data communication with the plurality of radiation measurement devices,
Each of the radiation measurement devices has a communication unit for performing data communication with the management device,
In each of the radiation measurement devices, transmission of the pseudo wave and reception of the pseudo wave are performed using the communication unit.
A system characterized by that. The system according to claim 12 or 13,
A first radiation measurement device designated as a pseudo-ray source in the training mode among the plurality of radiation measurement devices, and a second radiation measurement designated as a training object in the training mode among the plurality of radiation measurement devices. Data communication for authentication is executed prior to the transmission / reception of the pseudo wave with the device,
A system characterized by that. The system according to claim 12 or 13,
Of the plurality of radiation measurement devices, the first radiation measurement device designated as a pseudo-ray source in the training mode, and among the plurality of radiation measurement devices, the first radiation measurement device designated as the first training object in the training mode. Prior to the transmission and reception of the pseudo wave between the two radiation measurement devices, the first authentication data communication is executed,
Among the plurality of radiation measuring devices, the first radiation measuring device designated as a pseudo-ray source in the training mode, and among the plurality of radiation measuring devices, designated as a second training object in the training mode. Prior to transmission / reception of the pseudo wave with the third radiation measuring apparatus, second authentication data communication is executed,
A system characterized by that. A radiation detector for detecting radiation;
An actual measurement value calculation unit for calculating an actual measurement value based on the detection signal output from the radiation detector;
Means for controlling a pseudo wave to be transmitted when self is designated as a pseudo ray source in the training mode;
Means for controlling the pseudo wave transmitted from another radiation measurement device to be received when self is designated as a training target in the training mode, and calculating a pseudo measurement value based on the received signal; ,
A display unit that displays the actual measurement value in the actual measurement mode, and displays the pseudo measurement value when the self is designated as a training target in the training mode;
A radiation measuring apparatus comprising:

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