CN113534229A - Method and system for evaluating nuclear radiation resistance of nuclear radiation detector - Google Patents
Method and system for evaluating nuclear radiation resistance of nuclear radiation detector Download PDFInfo
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Abstract
The invention discloses a method and a system for evaluating nuclear radiation resistance of a nuclear radiation detector, wherein the method comprises the following steps: simulating a nuclear radiation environment, controlling the on-off of a nuclear radiation source by a master control server, detecting real-time dosage rate data in the environment by a nuclear radiation detector and transmitting the real-time dosage rate data to the master control server; starting a nuclear radiation source, obtaining nuclear radiation dose rate R1 at a nuclear radiation detector, reading real-time dose rate data of the nuclear radiation detector by a master control server at intervals of T until the number N of the T is obtained when the working state of the nuclear radiation detector is abnormal, wherein the maximum nuclear radiation resistant dose of the nuclear radiation detector is RmaxN × T × R1. The system comprises a master control server, a nuclear radiation shielding room, a communication protocol converter, a voltage-stabilized power supply, a nuclear radiation source, a nuclear radiation detector and a nuclear radiation source control system. The invention evaluates R before actual detectionmaxThe operation control during convenient actual detection improves detection accuracy, avoids damaging and causes the detection data to lose.
Description
Technical Field
The invention relates to the technical field of radiation safety monitoring, in particular to a nuclear radiation dose evaluation system and method for a nuclear radiation detector.
Background
Accidents causing leakage of a large amount of radioactive substances have occurred historically, radiation hazards are serious, and the resulting disasters cause palpitations to the heart of the public; in 2011, the first nuclear power station in the fukushima of japan caused nuclear leakage accidents due to earthquakes, and the continuously generated nuclear radiation crisis is very serious, so that public concern about safety protection of nuclear facilities is brought. In the safety protection process of nuclear facilities, nuclear radiation detection is an important ring for monitoring whether the nuclear radiation level in the area exceeds a safety threshold. In order to minimize the damage of nuclear radiation to human bodies, an unmanned aerial vehicle is adopted to enter a nuclear radiation area for detection at present.
When the nuclear radiation dose rate of a nuclear radiation area is detected, a nuclear radiation detector for detection is mounted on the unmanned aerial vehicle, but the nuclear radiation resistance of a circuit system of the nuclear radiation detector is limited when the nuclear radiation detector receives nuclear radiation. Meanwhile, in the prior art, the maximum nuclear radiation dose of the nuclear radiation detectors can not be uniformly calibrated, the maximum nuclear radiation dose of each nuclear radiation detector can be different, the circuit of the nuclear radiation detector is not easy to be perceived manually when being abnormal and damaged due to excessive nuclear radiation in the actual detection process of the unmanned aerial vehicle, and the data loss caused by circuit abnormality, inaccurate detection result or damaged scrapping due to excessive nuclear radiation occurs, so that the detection cost is increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and provide a method and a system for calibrating the maximum tolerable nuclear radiation dose of a nuclear radiation detector before the nuclear radiation detector enters a nuclear radiation area for detection, so that real-time recall is performed according to the received nuclear radiation dose in the actual detection process of the nuclear radiation detector, the accuracy of detection data is ensured, and the detection data loss caused by abnormality and damage of a circuit due to excessive nuclear radiation is avoided.
In order to solve the technical problem, the invention provides a nuclear radiation dose evaluation method for a nuclear radiation detector, which comprises the following steps: step 1: placing a nuclear radiation detector in a nuclear radiation shielding room, placing a master control server outside the nuclear radiation shielding room and connecting the master control server with the nuclear radiation detector, wherein a nuclear radiation source is arranged in the nuclear radiation shielding room, and nuclear radiation dose rates are calibrated at all positions in the nuclear radiation shielding room; the master control server controls the on-off of the nuclear radiation source, and the nuclear radiation detector detects real-time dose rate data in the environment and sends the real-time dose rate data to the master control server;
step 2: starting a nuclear radiation source in the nuclear radiation shielding room, and acquiring a nuclear radiation dose rate R1 at the position where the nuclear radiation detector is placed;
and step 3: the master control server reads real-time dose rate data R2 measured by the nuclear radiation detector at intervals of time T, the nuclear radiation source is closed until the working state of the nuclear radiation detector is abnormal, the number N of the elapsed time intervals T is obtained, and the maximum nuclear radiation resistant dose R of the nuclear radiation detector is obtained through calculationmax＝N×T×R1。
Furthermore, a nuclear radiation source control system is arranged in the nuclear radiation shielding chamber, and the master control server controls the switching of the nuclear radiation source through the nuclear radiation source control system.
Furthermore, the nuclear radiation detector is powered by a stabilized voltage power supply located outside the nuclear radiation shielding room, the stabilized voltage power supply is connected with the master control server, and the stabilized voltage power supply is provided with an output voltage value and a maximum allowed current value; and the master control server is connected with the nuclear radiation detector through a communication protocol converter.
Further, before the nuclear radiation source is started, the master control server detects the working states of a voltage-stabilized power supply and a communication protocol converter;
step 21: the master control server acquires the actual output voltage and current of the stabilized voltage power supply, judges whether the actual output voltage is the same as the set voltage and whether the actual output current is more than 0 and less than or equal to the maximum allowable current, judges that the working state of the stabilized voltage power supply is abnormal if the actual output voltage is not the same as the set voltage, and outputs error information and stops evaluation; if the voltage values are met, the working state of the stabilized voltage power supply is judged to be normal, and step 22 is executed;
step 22: the master control server is communicated with the communication protocol converter and judges whether normal communication can be carried out or not, if normal communication can be carried out, the nuclear radiation source is started, and the master control server obtains the real-time nuclear radiation dose rate R2 measured by the nuclear radiation detector; if normal communication cannot be performed, go to step 23;
step 23: outputting error information that the master control server and the communication protocol converter cannot normally communicate, judging whether to stop testing or not, and if so, stopping testing; if not, the communication protocol of the general control server and the communication protocol converter is reconfigured, and step 22 is executed.
Further, in step 3, the master control server reads the real-time dose rate data R2 measured by the nuclear radiation detector at intervals of time T, and turns off the nuclear radiation sources until the working state of the nuclear radiation detector received by the master control server is abnormal, so as to obtain the number N of elapsed time intervals T, which includes the specific processes of:
step 31: initializing N to 0, and initializing a working state FLAG of the identification nuclear radiation detector, wherein the FLAG is a binary number with the length of N bits, the value range of N is 3-32, and each bit is initialized to 0;
step 32: acquiring the actual output voltage and current of the stabilized voltage supply, judging whether the actual output voltage is the same as the set voltage and whether the actual output current is greater than 0 and less than or equal to the maximum allowable current, if not, judging that the working state of the stabilized voltage supply is abnormal, and judging that the working state of the stabilized voltage supply is normal by 1 st position of the FLAG, if so, judging that the working state of the stabilized voltage supply is normal, and not changing the value of the FLAG;
step 33: the master control server acquires the real-time dose rate data R2 of the nuclear radiation detector and judges whether the real-time dose rate data R2 of the nuclear radiation detector can be normally acquired, if the real-time dose rate data R2 of the nuclear radiation detector cannot be acquired, the step 35 is executed when the position 2 of the FLAG is 1; if so, go to step 34;
step 34: the master control server compares the real-time dose rate data R2 of the nuclear radiation detector with the nuclear radiation dose rate R1 of the nuclear radiation detector and judges whether the data are the same or not, if the data are different, the 3 rd position 1 of the FLAG is executed, and step 35 is executed; if the two are the same, executing step 35;
step 35: recording the values of the real-time dose rate data R2 and FLAG and the number N of the elapsed time intervals T;
step 36: comparing the value of FLAG with 0, and if equal to 0, executing step 37; if the time is more than 0, the working state of the nuclear radiation detector is abnormal, error information is output, the number N of the elapsed time intervals T is output, an alarm is given, and step 38 is executed;
step 37: the master control server judges whether a test stopping instruction is received or not, if the test stopping instruction is not received, after a time interval T, the step 32 is executed again, wherein N is equal to N + 1; if a stop test command is received, go to step 38;
step 38; and (4) closing the nuclear radiation source, starting nuclear radiation safety treatment measures, closing the stabilized voltage power supply and ending detection.
Further, the step 34 includes the step of the master control server determining whether the real-time dose rate data R2 of the nuclear radiation detector is different from the nuclear radiation dose rate R1 of the nuclear radiation detector, specifically:
acquiring the measurement error of the nuclear radiation detector, and if the absolute value of the difference between R2 and R1 is not less than or equal to the measurement error of the nuclear radiation detector, judging that the difference is different; if the absolute value of the difference between R2 and R1 is less than or equal to the measurement error of the nuclear radiation detector, the judgment is the same.
The invention also provides an unmanned aerial vehicle monitoring method for checking nuclear radiation dose resistance of the nuclear radiation detector, which comprises the following steps: before the nuclear radiation detector enters a nuclear radiation area for detection, the maximum nuclear radiation resistant dose R of the nuclear radiation detector is obtained by using an evaluation method of the nuclear radiation resistant performance of the nuclear radiation detectormax；
The unmanned aerial vehicle is mounted with the nuclear radiation detector and enters a nuclear radiation area to carry out nuclear radiation dosage rate detection, and real-time dosage rate data R 'of the nuclear radiation detector are read at intervals of time T'i(T '), after N' time intervals, if
Then theThe unmanned aerial vehicle automatically navigates back, wherein E is a preset maximum nuclear radiation dose allowance.
The invention also provides an evaluation system for the nuclear radiation resistance of the nuclear radiation detector, which comprises a master control server, a nuclear radiation shielding room, a communication protocol converter and a stabilized voltage power supply, wherein a nuclear radiation source and the nuclear radiation detector are arranged in the nuclear radiation shielding room,
the nuclear radiation shielding chamber is used for simulating a nuclear radiation environment, a nuclear radiation source is arranged in the nuclear radiation shielding chamber, nuclear radiation dose rates are calibrated at all positions in the nuclear radiation shielding chamber, nuclear radiation generated after the nuclear radiation source is turned on enables all positions in the shielding chamber to be filled with the nuclear radiation dose rates identical to the calibrated nuclear radiation dose rates, the communication protocol converter is used for enabling the master control server to be connected with and communicate with the nuclear radiation detector, and the voltage stabilizing power supply is used for supplying power to the nuclear radiation detector;
the nuclear radiation detector is a tested device, detects the real-time nuclear radiation dosage rate under the simulated nuclear radiation environment and transmits the real-time nuclear radiation dosage rate to the master control server through the communication protocol converter;
the master control server is used for controlling the switch of the nuclear radiation source, and monitoring the real-time working conditions of the stabilized voltage power supply and the nuclear radiation detector so as to evaluate the maximum nuclear radiation resistant dosage which can be borne by the nuclear radiation detector.
Further, the system also comprises a nuclear radiation source control system, and the master control server controls the switch of the nuclear radiation source through the nuclear radiation source control system.
Furthermore, the communication protocol converter is connected with the nuclear radiation detector in a wired mode for communication, and the communication protocol converter is communicated with the master control server in a wired mode;
the master control server controls the nuclear radiation source control system in a wired mode, and the master control server controls and monitors the work of the stabilized voltage power supply through a wired control communication interface.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the method for evaluating the nuclear radiation resistance of the nuclear radiation detector simulates the nuclear radiation environment before the nuclear radiation detector actually monitors the nuclear radiation area and evaluates and calibrates the maximum nuclear radiation resistance dose, so that the operation control can be carried out in real time according to the received nuclear radiation resistance dose in the subsequent actual monitoring process. The accuracy of the detection result of the nuclear radiation detector is improved, meanwhile, the nuclear radiation detector is convenient to overhaul in time, and the condition that nuclear radiation detection data are lost due to damage and scrapping caused by excessive radiation is effectively avoided.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic structural diagram of a FLAG FLAG according to the present invention.
Fig. 3 is a schematic diagram of the system of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
In the description of the present invention, it should be understood that the term "comprises/comprising" is intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the listed steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, an embodiment of a method for evaluating a nuclear radiation dose resistance of a nuclear radiation detector according to the present invention includes:
step 1: a nuclear radiation detector is arranged in a nuclear radiation shielding room, a master control server is arranged outside the nuclear radiation shielding room and is connected with the nuclear radiation detector, a nuclear radiation source is arranged in the nuclear radiation shielding room, and nuclear radiation dose rates are calibrated at all positions in the nuclear radiation shielding room; the nuclear radiation dose rate of a nuclear radiation source at each position in a nuclear radiation shielding chamber is calibrated in advance according to the distance, a raised source is taken as a center, gamma-ray radiation is taken as an example, attenuation is carried out in inverse proportion to the square of the distance, and calibrated dose rate tables are arranged at different distances (equivalent to the radius) from the center. The master control server controls the on-off of the nuclear radiation source, the nuclear radiation detector is a device to be tested, and the nuclear radiation detector detects real-time dose rate data in the environment and sends the real-time dose rate data to the master control server.
The nuclear radiation detector is powered by a stabilized voltage power supply positioned outside the nuclear radiation shielding chamber, the stabilized voltage power supply is connected with the master control server, and the stabilized voltage power supply is provided with an output voltage value and a maximum allowable current value; the set output voltage value (unit is volt (V)) of the stabilized voltage supply stably supplies power for the nuclear radiation detector, and whether a circuit of the nuclear radiation detector is interfered and damaged due to nuclear radiation can be judged through voltage conversion of the stabilized voltage supply; the maximum allowable current value (unit is ampere (A)) plays a role in limiting current, prevents the damage of the detected nuclear radiation detector caused by overlarge circuit current, and can also be used for judging whether the circuit is interfered and damaged due to nuclear radiation. The master control server is connected with the nuclear radiation detector through a communication protocol converter, and before the nuclear radiation source is started, a protocol for communicating with the nuclear radiation detector is configured on the master control server, so that the master control server can communicate with the nuclear radiation detector through the communication protocol converter.
Step 2: the nuclear radiation in the nuclear radiation shielding room is controlled by a switch of a nuclear radiation source in the nuclear radiation shielding room, the nuclear radiation source in the nuclear radiation shielding room is started, the nuclear radiation shielding room is filled with the nuclear radiation dose rate which is the same as the calibrated nuclear radiation dose rate, and the nuclear radiation dose rate R1 at the position where the nuclear radiation detector is placed is obtained.
Before the nuclear radiation source is started, the master control server carries out initialization configuration and sets the voltage and the voltage of the voltage-stabilized power supply. Meanwhile, the master control server detects the working states of the stabilized voltage power supply and the communication protocol converter, and is used for avoiding inaccurate evaluation of the maximum nuclear radiation resistant dose caused by the problems of the stabilized voltage power supply and the communication protocol converter.
Step 21: the master control server acquires the actual output voltage and current of the stabilized voltage power supply, judges whether the actual output voltage and current are normal, namely judges whether the actual output voltage meets the set voltage and whether the actual output current meets the maximum allowable current which is more than 0 and less than or equal to the maximum allowable current, if not, judges that the working state of the stabilized voltage power supply is abnormal, and outputs error information and stops evaluation; if the voltage values are met, the working state of the stabilized voltage power supply is judged to be normal, and step 22 is executed;
step 22: the master control server is communicated with the communication protocol converter and judges whether normal communication can be carried out or not, if normal communication can be carried out, data of the nuclear radiation detector at the moment are displayed and a nuclear radiation source is started, and the master control server obtains real-time nuclear radiation dose rate R2 measured by the nuclear radiation detector; if normal communication cannot be performed, go to step 23;
step 23: outputting error information that the master control server and the communication protocol converter cannot normally communicate, judging whether to stop testing or not, and if so, stopping testing; if not, the communication protocol of the general control server and the communication protocol converter is reconfigured, and step 22 is executed.
After the nuclear radiation detector is started, the nuclear radiation detector detects the real-time dose rate in the environment in the nuclear shielding room, and the master control server reads the real-time dose rate data and displays nuclear radiation warning icons and information for reminding an operator to start detection. After the nuclear radiation source is started, timing is started, and the timing has two functions: on the one hand, to associate real-time dose rate data with a time point, and on the other hand, to periodically acquire real-time dose rate data under test at configured time intervals T (minutes).
And step 3: and the master control server reads real-time dose rate data R2 measured by the nuclear radiation detector at intervals of time T, and closes the nuclear radiation source until the working state of the nuclear radiation detector is abnormal, so as to obtain the number N of the elapsed time intervals T. Real-time dose rate data R2 measured by the radiation detector and energy spectrum information, such as geiger counter count values, neutron energy spectrum data, gamma energy spectrum data, neutron flux count values, and the like.
Step 31: the initialization N is 0, the working state FLAG of the nuclear radiation detector is identified through initialization, the FLAG is a binary number with the length of N bits, the value range of N is 3-32, each bit of the initialization is 0, and the FLAG is used for identifying whether the nuclear radiation detector works normally. In the embodiment, n is 16, and it is most convenient from the programming perspective to use 16 bits or 32 bits, since there are three cases in the present invention for determining the operating state of the nuclear radiation detector, 16 bits are selected here, and 13 state expansion interfaces are left. As shown in fig. 2, which is a schematic structural diagram of FLAG, each bit of 16 bits is default to 0; f _ DevPower bit for identifying whether the power supply of the nuclear radiation detector is normal, 0 represents normal, and 1 represents abnormal; f _ DevComm bit for identifying whether the communication of the nuclear radiation detector is normal, 0 represents normal, and 1 represents abnormal; an F _ DevData bit for identifying whether the measurement data of the nuclear radiation detector is normal, wherein 0 represents normal, and 1 represents abnormal; the Rev area is reserved from 4 th bit to 16 th bit and can be expanded for use according to functions. In this embodiment, the FLAG is stored by using a 16-bit binary register, the 0 th bit of the binary register bit sequence is the lowest bit, and the 0 th to 15 th bit sequences of the binary register correspond to the 1 st to 16 th bits of the FLAG structure.
Step 32: and acquiring the actual output voltage and current of the stabilized voltage supply, judging whether the actual output voltage is the same as the set voltage and whether the actual output current is greater than 0 and less than or equal to the maximum allowable current, if not, judging that the working state of the stabilized voltage supply is abnormal, and judging that the working state of the stabilized voltage supply is normal by 1 st position of the FLAG, and if so, judging that the working state of the stabilized voltage supply is normal without changing the value of the FLAG.
Step 33: the master control server acquires real-time dose rate data R2 of the nuclear radiation detector and judges whether the real-time dose rate data R2 of the nuclear radiation detector can be normally acquired, if the real-time dose rate data R2 cannot be acquired, namely the master control server and the nuclear radiation detector cannot normally communicate at the moment, the 2 nd position 1 of the FLAG is executed, and step 35 is executed; if so, step 34 is performed.
Step 34: the general control server displays R2 by adopting a graphical method, compares the real-time dose rate data R2 of the nuclear radiation detector with the nuclear radiation dose rate R1 at the position and judges whether the data are the same or not, namely, the measurement error of the nuclear radiation detector is obtained firstly, and if the difference between R2 and R1 is not less than or equal to the measurement error of the nuclear radiation detector, the data are judged to be different; if the difference between R2 and R1 is less than or equal to the measurement error of the nuclear radiation detector, the judgment is the same. If not, the 3 rd position of the FLAG is 1, and the step 35 is executed; if so, step 35 is performed directly.
Step 35: and recording the current real-time dose rate data R2, the value of the FLAG and the number N of the elapsed time intervals T, wherein the value of the FLAG records the working state of the nuclear radiation detector when the data information is acquired.
Step 36: comparing the value of FLAG with 0, namely judging whether the working state of the current nuclear radiation detector in the working state evaluation period is normal, if so, indicating that the working state of the nuclear radiation detector is normal, and executing step 37; if the number of the time intervals T is larger than 0, the working state of the nuclear radiation detector is abnormal, the master control server outputs error information, the number N of the elapsed time intervals T and gives an alarm, an operator is prompted to check the fault, and the step 38 is executed; the alarm mode comprises the steps of alarming through a loudspeaker of the master control server, displaying interface warning information, flashing and alarming, alarming for a short message of a mobile phone number prestored by an operator, and alarming for sending a mail to an Email address prestored by the operator. In this embodiment, the alarm mode is one of four modes or any combination of several modes.
Step 37: the master control server judges whether a test stopping instruction is received or not, if the test stopping instruction is not received, after a time interval T (minutes), the step 32 is executed again, and the N is equal to N + 1; if a stop test command is received, go to step 38; the test stopping instruction mainly comprises the following three forms: the method comprises the steps that an operator directly controls a master control server to send a test stopping instruction, the operator remotely sends the test stopping instruction to the master control server, and the operator sends the test stopping instruction to forcibly stop testing when a nuclear radiation source is abnormal.
By periodically executing the flow from step 32 to step 37 at intervals of time T (minutes), the acquisition, storage and graphical display of the working state data of the nuclear radiation detector based on the time line can be realized, and the working state data can be used for calculating and obtaining the maximum nuclear radiation dose of the nuclear radiation detector.
Step 38: and (4) closing the nuclear radiation source, starting the nuclear radiation safety treatment measures and closing the stabilized voltage supply, namely closing the nuclear radiation detector, and ending the detection.
In this embodiment, the time interval T is {0.5,1, 1.5., 4.5,5} minutes, preferably 0.5 minutes. The nuclear radiation source is closed until the working state of the nuclear radiation detector received by the master control server is abnormal, namely the FLAG value is not equal to 0, the number N of the elapsed time intervals T is obtained, and the maximum nuclear radiation resistant dose R of the nuclear radiation detector is obtained through calculationmax＝N×T×R1。
The embodiment also provides an unmanned aerial vehicle monitoring method for nuclear radiation dose resistance of a nuclear radiation detector, which comprises the following steps:
before the nuclear radiation detector enters a nuclear radiation area for detection, the method for evaluating the nuclear radiation resistance of the nuclear radiation detector in the embodiment is used for obtaining the maximum nuclear radiation resistance dose R of the nuclear radiation detectormax。
The unmanned aerial vehicle is mounted on the nuclear radiation detector and enters a nuclear radiation area to perform nuclear radiation dosage rate detection, in the embodiment, the unmanned aerial vehicle is controlled by a remote controller, the remote controller controls the unmanned aerial vehicle to move, and real-time dosage rate data R 'of the nuclear radiation detector is read at intervals of time T'i(T '), the amount of nuclear radiation to which the nuclear radiation detector has been exposed after N' time intervals
If it is
Then it is gotThe unmanned aerial vehicle automatic return voyage is characterized in that E is a preset maximum nuclear radiation resistant dose allowance and is used for ensuring that the unmanned aerial vehicle can normally detect the nuclear radiation dose rate before the unmanned aerial vehicle returns voyage, and the value of E is a normal number. In this embodiment, the time interval T' is 0.5 minute, the total nuclear radiation doses received by the nuclear radiation detector are superimposed in real time, and the nuclear radiation doses received in the return path are considered to be the same, if the requirements are met
The method has the advantages that the accuracy of the detection result can be guaranteed by the time return process, and the nuclear radiation detector can return process before being damaged, so that the nuclear radiation detector can be maintained in time, and data loss caused by damage and scrapping is avoided.
Referring to fig. 3, an embodiment of an evaluation system for nuclear radiation resistance of a nuclear radiation detector in the present invention includes:
the nuclear radiation shielding room is internally provided with a nuclear radiation source and a nuclear radiation detector, the nuclear radiation source is arranged in the nuclear radiation shielding room for environmental safety to prevent nuclear radiation from leaking, and the master control server, the stabilized power supply and the communication protocol converter are arranged outside the nuclear radiation shielding room.
The nuclear radiation shielding chamber is used for simulating a nuclear radiation environment, a nuclear radiation source is arranged in the nuclear radiation shielding chamber, nuclear radiation dose rates are calibrated at all positions in the nuclear radiation shielding chamber, nuclear radiation generated after the nuclear radiation source is turned on enables all positions in the shielding chamber to be filled with the nuclear radiation dose rates identical to the calibrated nuclear radiation dose rates, and the communication protocol converter is used for enabling the master control server to be connected with and communicated with the nuclear radiation detector. The voltage stabilizing power supply is respectively connected with the master control server and the nuclear radiation detector and is used for supplying power to the nuclear radiation detector; the nuclear radiation detector is a tested device, detects the real-time nuclear radiation dose rate in a simulated nuclear radiation environment and transmits the real-time nuclear radiation dose rate to the master control server through the communication protocol converter; the master control server is used for controlling the switch of the nuclear radiation source, monitoring the real-time working conditions of the stabilized voltage power supply and the nuclear radiation detector, and accordingly evaluating the maximum nuclear radiation resistant dose which can be borne by the nuclear radiation detector. The master control server controls and monitors the work of the stabilized voltage power supply, and the master control server controls the output voltage and the maximum current of the stabilized voltage power supply and obtains the actual voltage and current output value of the stabilized voltage power supply so as to monitor the working state of the stabilized voltage power supply. The master control server monitors the operation of the nuclear radiation detector and gives an alarm when an error occurs.
And a nuclear radiation source control system is also arranged in the nuclear radiation shielding chamber, and the master control server controls the switch of the nuclear radiation source through the nuclear radiation source control system. The nuclear radiation source control system is an existing device and comprises a sedimentation device and a sealing solution. When the nuclear radiation source is closed, the master control server sinks the nuclear radiation source into the water through the sedimentation device to be closed, and no nuclear radiation exists in the nuclear radiation shielding chamber; when the nuclear radiation source is started, the master control server lifts the nuclear radiation source from the water through the sedimentation device, and nuclear radiation in the nuclear radiation shielding chamber is shielded.
The communication protocol converter is connected with the nuclear radiation detector in a wired mode for communication, and the communication protocol converter is communicated with the master control server in a wired mode; the master control server can acquire nuclear radiation detection data of the nuclear radiation detector through wired communication outside the nuclear radiation shielding room, and the communication effect in a nuclear radiation area is guaranteed. The master control server controls the nuclear radiation source control system in a wired mode, and controls and monitors the work of the stabilized voltage power supply through a wired control communication interface. The communication protocol converter is adapted to a data communication interface of the nuclear radiation detector, and the data communication interface supports protocols such as RS485 and RS 422; the control communication interface comprises a serial port and a network interface (LAN) communication interface.
Compared with the prior art, the technical scheme of the invention has the following advantages: the method for evaluating the nuclear radiation resistance of the nuclear radiation detector simulates the nuclear radiation environment before the nuclear radiation detector actually monitors the nuclear radiation area and evaluates and calibrates the maximum nuclear radiation resistance dose, so that the operation control can be carried out in real time according to the received nuclear radiation resistance dose in the subsequent actual monitoring process. The accuracy of the detection result of the nuclear radiation detector is improved, meanwhile, the nuclear radiation detector is convenient to overhaul in time, and the condition that nuclear radiation detection data are lost due to damage and scrapping caused by excessive radiation is effectively avoided.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A method for evaluating the nuclear radiation resistance of a nuclear radiation detector is characterized by comprising the following steps:
step 1: the method comprises the steps that a nuclear radiation detector is arranged in a nuclear radiation shielding room, a master control server is arranged outside the nuclear radiation shielding room and is connected with the nuclear radiation detector, a nuclear radiation source is arranged in the nuclear radiation shielding room, and nuclear radiation dose rates are calibrated at all positions in the nuclear radiation shielding room; the master control server controls the on-off of the nuclear radiation source, and the nuclear radiation detector detects real-time dose rate data in the environment and sends the real-time dose rate data to the master control server;
step 2: starting the nuclear radiation source, and acquiring a nuclear radiation dose rate R1 at the position where the nuclear radiation detector is placed;
and step 3: the master control server reads real-time dose rate data R2 measured by the nuclear radiation detector at intervals of time T, the nuclear radiation source is closed until the working state of the nuclear radiation detector is abnormal, the number N of the elapsed time intervals T is obtained, and the maximum nuclear radiation resistant dose R of the nuclear radiation detector is obtained through calculationmax＝N×T×R1。
2. The method for evaluating the nuclear radiation resistance of the nuclear radiation detector according to claim 1, wherein: and a nuclear radiation source control system is arranged in the nuclear radiation shielding chamber, and the master control server controls the switching of the nuclear radiation source through the nuclear radiation source control system.
3. The method for evaluating the nuclear radiation resistance of the nuclear radiation detector according to claim 1, wherein: the nuclear radiation detector is powered by a stabilized voltage power supply positioned outside the nuclear radiation shielding chamber, the stabilized voltage power supply is connected with the master control server, and the stabilized voltage power supply is provided with an output voltage value and a maximum allowable current value; and the master control server is connected with the nuclear radiation detector through a communication protocol converter.
4. A method for evaluating the nuclear radiation resistance of a nuclear radiation detector according to claim 3, wherein: before the nuclear radiation source is started, the master control server detects the working states of a voltage-stabilized power supply and a communication protocol converter;
step 21: the master control server acquires the actual output voltage and current of the stabilized voltage power supply, judges whether the actual output voltage is the same as the set voltage and whether the actual output current is greater than 0 and less than or equal to the maximum allowable current, judges that the working state of the stabilized voltage power supply is abnormal if the actual output voltage is not greater than 0 and less than or equal to the maximum allowable current, and outputs error information and stops evaluation; if the voltage values are met, the working state of the stabilized voltage power supply is judged to be normal, and step 22 is executed;
step 22: the master control server communicates with the communication protocol converter and judges whether normal communication can be carried out or not, if the normal communication can be carried out, the nuclear radiation source is started, and the master control server obtains the real-time nuclear radiation dose rate R2 measured by the nuclear radiation detector; if normal communication cannot be performed, go to step 23;
step 23: outputting error information that the master control server and the communication protocol converter cannot normally communicate, judging whether to stop testing or not, and if so, stopping testing; if not, the communication protocol of the general control server and the communication protocol converter is reconfigured, and step 22 is executed.
5. A method for evaluating the nuclear radiation resistance of a nuclear radiation detector according to claim 3, wherein: in step 3, the master control server reads the real-time dose rate data R2 measured by the nuclear radiation detector at a time interval T, and turns off the nuclear radiation source until the working state of the nuclear radiation detector received by the master control server is abnormal, so as to obtain the number N of the elapsed time intervals T, which specifically includes the following steps:
step 31: initializing N to 0, and initializing a working state FLAG of the identification nuclear radiation detector, wherein the FLAG is a binary number with the length of N bits, the value range of N is 3-32, and each bit is initialized to 0;
step 32: acquiring the actual output voltage and current of the stabilized voltage supply, judging whether the actual output voltage is the same as the set voltage and whether the actual output current is greater than 0 and less than or equal to the maximum allowable current, if not, judging that the working state of the stabilized voltage supply is abnormal, and judging that the working state of the stabilized voltage supply is normal by 1 st position of the FLAG, if so, judging that the working state of the stabilized voltage supply is normal, and not changing the value of the FLAG;
step 33: the master control server acquires the real-time dose rate data R2 of the nuclear radiation detector and judges whether the real-time dose rate data R2 of the nuclear radiation detector can be normally acquired, if the real-time dose rate data R2 of the nuclear radiation detector cannot be acquired, the step 35 is executed when the position 2 of the FLAG is 1; if so, go to step 34;
step 34: the master control server compares the real-time dose rate data R2 of the nuclear radiation detector with the nuclear radiation dose rate R1 of the nuclear radiation detector and judges whether the data are the same or not, if the data are different, the 3 rd position 1 of the FLAG is executed, and step 35 is executed; if the two are the same, executing step 35;
step 35: recording the values of the real-time dose rate data R2 and FLAG and the number N of the elapsed time intervals T;
step 36: comparing the value of FLAG with 0, and if equal to 0, executing step 37; if the number of the time intervals T is larger than 0, the working state of the nuclear radiation detector is abnormal, error information is output, the number N of the elapsed time intervals T is output, an alarm is given, and step 38 is executed;
step 37: the master control server judges whether a test stopping instruction is received or not, if the test stopping instruction is not received, after a time interval T, the step 32 is executed again, wherein N is equal to N + 1; if a stop test command is received, go to step 38;
step 38; and (4) closing the nuclear radiation source, starting nuclear radiation safety treatment measures, closing the stabilized voltage power supply and ending detection.
6. The method for evaluating the nuclear radiation resistance of the nuclear radiation detector according to claim 5, wherein: the step 34 is that the master control server determines whether the real-time dose rate data R2 of the nuclear radiation detector is different from the nuclear radiation dose rate R1 at the location, specifically:
acquiring the measurement error of the nuclear radiation detector, and if the absolute value of the difference between R2 and R1 is not less than or equal to the measurement error of the nuclear radiation detector, judging that the difference is different; and if the absolute value of the difference between the R2 and the R1 is less than or equal to the measurement error of the nuclear radiation detector, the judgment is the same.
7. An unmanned aerial vehicle monitoring method for verifying nuclear radiation dose resistance of a nuclear radiation detector is characterized by comprising the following steps:
before the nuclear radiation detector enters a nuclear radiation area for detection, the method for evaluating the nuclear radiation resistance of the nuclear radiation detector according to any one of claims 1 to 6 is used for obtaining the maximum nuclear radiation resistance dose R of the nuclear radiation detectormax；
The unmanned aerial vehicle is mounted with the nuclear radiation detector and enters a nuclear radiation area to carry out nuclear radiation dosage rate detection, and real-time dosage rate data R 'of the nuclear radiation detector are read at intervals of time T'i(T '), after N' time intervals, if
And the unmanned aerial vehicle automatically navigates back, wherein E is the preset maximum nuclear radiation resistant dose allowance.
8. An evaluation system for nuclear radiation resistance of a nuclear radiation detector is characterized in that: comprises a master control server, a nuclear radiation shielding room, a communication protocol converter and a stabilized voltage power supply, wherein a nuclear radiation detector is arranged in the nuclear radiation shielding room,
the nuclear radiation shielding chamber is used for simulating a nuclear radiation environment, a nuclear radiation source is arranged in the nuclear radiation shielding chamber, nuclear radiation dose rates are calibrated at all positions in the nuclear radiation shielding chamber, nuclear radiation generated after the nuclear radiation source is turned on enables all positions in the shielding chamber to be filled with the nuclear radiation dose rates identical to the calibrated nuclear radiation dose rates, the communication protocol converter is used for enabling the master control server to be connected with and communicate with the nuclear radiation detector, and the stabilized voltage power supply is used for supplying power to the nuclear radiation detector;
the nuclear radiation detector is a tested device, detects the real-time nuclear radiation dose rate in a simulated nuclear radiation environment and transmits the real-time nuclear radiation dose rate to the master control server through the communication protocol converter;
the master control server is used for controlling the switch of the nuclear radiation source, monitoring the real-time working conditions of the stabilized voltage power supply and the nuclear radiation detector, and accordingly evaluating the maximum nuclear radiation resistant dose which can be borne by the nuclear radiation detector.
9. The system for evaluating the nuclear radiation resistance of the nuclear radiation detector according to claim 8, wherein: the system also comprises a nuclear radiation source control system, and the master control server controls the switch of the nuclear radiation source through the nuclear radiation source control system.
10. The system for evaluating the nuclear radiation resistance of the nuclear radiation detector according to claim 9, wherein: the communication protocol converter is connected with the nuclear radiation detector in a wired mode for communication, and the communication protocol converter is communicated with the master control server in a wired mode;
the master control server controls the nuclear radiation source control system in a wired mode, and controls and monitors the work of the stabilized voltage power supply through a wired control communication interface.
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