CN110988956A - Method and device for measuring space gamma dose rate radiation field - Google Patents
Method and device for measuring space gamma dose rate radiation field Download PDFInfo
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- CN110988956A CN110988956A CN201911163685.0A CN201911163685A CN110988956A CN 110988956 A CN110988956 A CN 110988956A CN 201911163685 A CN201911163685 A CN 201911163685A CN 110988956 A CN110988956 A CN 110988956A
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/02—Dosimeters
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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Abstract
The invention provides a measuring method and a measuring device for a space gamma dose rate radiation field, wherein the measuring method comprises the following steps: s1, measuring the radiation dose rate of the current position of the radiation field by using a dose rate meter, and transmitting the measured radiation dose rate data to a computer for processing; s2, measuring the spatial coordinate position of the radiation field where the dose rate meter is located by using a total station, and transmitting the measured spatial coordinate position information to a computer for processing; s3, processing the dose rate data and the spatial coordinate position information received in the steps S1 and S2 by the computer to obtain the radiation dose rate and the spatial coordinate position data information of the position of the radiation field; s4, the dose rate meter measures the radiation dose rate of the other position of the radiation field, and the steps S1 to S3 are repeated until the radiation dose rate and the spatial position data information of the measurement point of the whole radiation field are collected; the measuring method in the scheme can greatly reduce the workload and the working time and avoid the excessive dosage of the personnel.
Description
Technical Field
The invention relates to the technical field of gamma ray detection, in particular to a method and a device for measuring a space gamma dose rate radiation field.
Background
The measurement of radiation fields in three-dimensional space provides a data basis for radiation protection optimization, so that how to accurately, quickly and conveniently measure dose rate data of space position coordinates under the condition of minimum irradiated dose becomes a key. The general method has more defects, and a mature measuring system and device do not exist, specifically, a long-rod dose rate meter is used for measuring the dose rates at different positions, but coordinate points of a current measuring point in the whole three-dimensional space cannot be accurately obtained, so that great inconvenience is brought to subsequent radiation field calculation and source item inversion work, and therefore a new measuring method and device are urgently needed to realize accurate and rapid three-dimensional space dose field measurement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a device for measuring a space gamma dose rate radiation field, which can accurately, quickly and conveniently measure dose rate data of a space position coordinate.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for spatial gamma dose rate radiation field measurement, the method comprising the steps of:
s1, measuring the radiation dose rate of the current position of the radiation field by using a dose rate meter, and transmitting the measured radiation dose rate data to a computer for processing; s2, measuring the spatial coordinate position of the radiation field where the dose rate meter is located by using a total station, and transmitting the measured spatial coordinate position information to a computer for processing; s3, processing the dose rate data and the spatial coordinate position information received in the steps S1 and S2 by the computer to obtain the radiation dose rate and the spatial coordinate position data information of the position of the radiation field; and S4, the dosage rate meter measures the radiation dosage rate of the other position of the radiation field, and the steps S1 to S3 are repeated until the radiation dosage rate and the spatial position data information of the measurement point of the whole radiation field are acquired.
Further, in step S1, the radiation dose rate data measured by the dose rate meter is transmitted to the infrared-to-bluetooth module in the form of infrared light, and the infrared-to-bluetooth module transmits the received data to the computer.
Further, in step S2, the total station acquires coordinate information by receiving a coordinate acquisition command sent from a computer.
Further, the total station starts to continuously acquire coordinate information three times after receiving the coordinate command and feeds the coordinate information back to the computer for processing.
Further, when the total station starts to measure, a timer and a timer event with a certain time period are set, and after the set time period of the timer is reached, the cubic coordinate information collected by the total station is processed on the computer, wherein when the relative deviation of the cubic coordinate information is smaller than a certain threshold value, the measured data is available, otherwise, the measured data is abandoned.
Further, the timer has a timing time of 4.5 seconds, and in the event of the set 4.5S timer and timer, the dosimeter transmits dose rate data at a rate of 1/S, and in the process, 4 dose rate information is received, target information is extracted, and an average dose rate value is obtained.
Meanwhile, the invention also provides a measuring device for realizing the measuring method for the space gamma dose rate radiation field, wherein the measuring device comprises a total station, a measuring rate instrument, a computer and upper computer software installed on the computer, the total station is in communication connection with the computer through a USB data line, and the measuring rate instrument is in communication connection with the computer through wireless.
Furthermore, the measuring rate instrument is wirelessly connected with the computer through a data acquisition and processing unit and a Bluetooth module which are arranged.
Further, the rate meter includes an inner probe and an outer probe.
The scheme has the beneficial technical effects that: the measuring method and the measuring device in the scheme are connected with a computer (PC) in a wireless mode by adopting the total station and the dose rate meter, so that the working load and the working time are greatly reduced, and further, the excessive dose of the personnel is avoided; meanwhile, the measuring device is connected with a PC and upper computer software by utilizing USB communication and wireless Bluetooth communication, automatically receives, processes, displays and stores measured data, and is greatly convenient for on-site measurement work.
Drawings
FIG. 1 is a schematic diagram of a device for measuring a spatial gamma dose rate radiation field according to the present invention.
Fig. 2 is a block diagram illustrating the wireless data transmission principle of the dose rate meter according to the present invention.
Fig. 3 is a schematic diagram of the initialization setting process of the upper computer software in the present invention.
Fig. 4 is a schematic diagram of the data measurement and processing flow of the upper computer software in the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The embodiment provides a method and a device for measuring a space gamma dose rate radiation field, which can accurately, quickly and conveniently measure dose rate data of space position coordinates, aiming at the problems that the existing measuring means of the radiation field in the three-dimensional space can not accurately obtain coordinate points of a current measuring point in the whole three-dimensional space and brings great inconvenience to subsequent radiation field calculation and source item inversion work.
Referring to fig. 1, the device for measuring a spatial gamma dose rate radiation field in the present embodiment includes a total station, a dose rate meter, and a tablet computer. The total station adopts prism-free infrared laser total station of KOLIDA (Kolida), which has large measuring range and high precision. And the total station is connected with the tablet personal computer through a USB line to send instructions and acquire coordinate data. The dose rate meter is a multifunctional radiation measuring instrument of Thermo (Sammerfo) company, can be combined with an external intelligent probe, and can communicate with a PC (personal computer) through a connecting line of an infrared-to-serial port.
In the actual measurement situation, when the position of the dose rate meter changes frequently and the radiation hot spot area or the spatial position is high, the connection line between the dose rate meter and the PC causes inconvenience in actual use. In order to remove the adverse effect of the connecting line, the dosage rate information is transmitted to the PC in a wireless transmission mode by adopting an infrared-to-Bluetooth mode. Referring to fig. 2 in combination, the dose rate meter itself includes an internal probe, and may also incorporate an external probe for measurement. The data acquisition unit transmits the dose rate data of the internal probe and the external probe to the infrared coding and decoding module in a UART (serial port communication) mode, then transmits the dose rate data in an infrared light mode, starts a decoding function, and transmits the dose rate data to the MCU (microprocessor) through the UART for data processing. The MCU after finishing the data sends the data information to the Bluetooth module through the UART, and the Bluetooth module carries the data on a 2.4G carrier wave for wireless transmission. The PC opens the Bluetooth function, searches the infrared Bluetooth module, and performs data acquisition, processing and display by the upper computer after completing pairing.
In this embodiment, the upper computer software installed on the PC is written in Visual Studio-C sharp language, and data communication is mainly performed through a COM port. Because the total station and the dose rate meter in the radiation field measurement system are respectively in serial communication in different communication modes, two COM ports are required to be designed in the software for respective communication, and then collected data is processed. The upper computer software functions comprise serial communication, parameter setting, data acquisition and judgment, data display, data deletion and data storage, wherein the data display comprises corresponding historical original data, processed data and measuring time.
Initializing software of an upper computer:
referring to fig. 3, a schematic diagram of an initialization setting process of the upper computer software is shown. When the electronic total station is used, the electronic total station is connected to a tablet personal computer through a USB (universal serial bus), and equipment is normally found; and opening the Bluetooth module of the tablet personal computer, searching the dose rate meter, and normally discovering the equipment after pairing is successful. Opening the upper computer software to select the COM port of the corresponding equipment, configuring serial port communication parameters, and starting initialization setting, wherein the communication parameter configuration is as shown in the following table I:
watch 1
If the COM port of the corresponding device is not found, checking whether the device connection is correct, then refreshing again, and selecting the corresponding COM port to realize successful connection configuration.
The upper computer data acquisition, processing and display:
and after the initialization of the upper computer is completed, starting to acquire data. Serial port communication mainly adopts a Serialport control to send and collect data. When the upper computer sends a command, the character string needs to be converted into a byte array, and the byte array is sent through a serial port write () function. The serial port data receiving event seriaport1.datareceived subscribes to receive data, and the specific event subscription statement is as follows:
SeriaPort1.DataReceived+＝new SerialDataReceivedEventHandler(serialPort1_DataReceived1)；
wherein seriaPort1.DataReceived is a data receiving method. When the receiving events of the two SeriaPort are subscribed, the corresponding data can be respectively received.
When the rate meter starts to communicate, a data packet is automatically sent every second (time can be set), the data packet comprises internal probe rate information, external probe rate information and current rate meter battery voltage information, and the data format for receiving the rate information is shown in the following table 2:
watch two
The total station receives a coordinate acquisition command sent by upper computer software, adopts three times of continuous measurement and averaging, and then sends three times of coordinate information and final average coordinate information to the upper computer software. In order to improve the accuracy of the dosage rate, a method for solving an average value by multiple measurements is adopted. The total station has the coordinate average value of the feedback data information, but the limit value of the relative deviation of the coordinate data measured three times is not judged and abandoned. If only the final coordinate mean is used as the current coordinate data, it is very easy to cause the coordinate to deviate seriously. Therefore, three times of data of the total station are needed to be subjected to relative deviation calculation analysis, and whether the coordinates are available or not is determined. The format of the command and the format of the return data of the collecting total station are shown in the third table.
Watch III
And after receiving the coordinate acquisition command, the total station starts to continuously acquire coordinate information for three times and feeds the coordinate information back to the upper computer, and the process takes about 4 seconds. Therefore, at the start of the measurement, a 4.5S timer and a timer event need to be set. In the process, 4 dose rate information is received, target information is extracted, an average dose rate value is obtained, the coordinate information is processed after 4.5s, when the relative deviation of the three times of coordinate information is smaller than a certain threshold value, the measurement data is available, otherwise, the measurement data is discarded. And then, the dosage rate information, the coordinate information and the current time are written into the DataGridView as a data packet at one time for displaying the measured data information. The specific data measurement process can be seen with reference to fig. 4.
Deleting and storing the upper computer software data:
to remove the non-conforming data from DataGridView, a delete row data function is added. Clicking a line head to be deleted by a mouse, pressing a deletion button to delete the line change, facilitating subsequent use and analysis of measured data, storing the data in the DataGridView, continuously reading each line of data in the DataGridView, and conveniently writing all measured data into a text document by using a StreamWrite class to realize data storage.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (9)
1. A method for measuring a spatial gamma dose rate radiation field, the method comprising the steps of:
s1, measuring the radiation dose rate of the current position of the radiation field by using a dose rate meter, and transmitting the measured radiation dose rate data to a computer for processing;
s2, measuring the spatial coordinate position of the radiation field where the dose rate meter is located by using a total station, and transmitting the measured spatial coordinate position information to a computer for processing;
s3, processing the dose rate data and the spatial coordinate position information received in the steps S1 and S2 by the computer to obtain the radiation dose rate and the spatial coordinate position data information of the position of the radiation field;
and S4, the dosage rate meter measures the radiation dosage rate of the other position of the radiation field, and the steps S1 to S3 are repeated until the radiation dosage rate and the spatial position data information of the measurement point of the whole radiation field are acquired.
2. A method for spatial gamma dose rate radiation field measurement as claimed in claim 1 wherein: in step S1, the radiation dose rate data measured by the dose rate meter is transmitted to the infrared-to-bluetooth module in the form of infrared light, and the infrared-to-bluetooth module transmits the received data to the computer.
3. A method for spatial gamma dose rate radiation field measurement as claimed in claim 1 or claim 2 wherein: in step S2, the total station acquires coordinate information by receiving a coordinate acquisition command sent from a computer.
4. A method for spatial gamma dose rate radiation field measurement as claimed in claim 3 wherein: and after receiving the coordinate command, the total station starts to continuously acquire coordinate information for three times and feeds the coordinate information back to the computer for processing.
5. A method for spatial gamma dose rate radiation field measurement as claimed in claim 4 wherein: when the total station starts to measure, a timer and a timer event with a certain time period are set, and after the set time period of the timer is reached, the cubic coordinate information collected by the total station on a computer is processed, wherein when the relative deviation of the cubic coordinate information is smaller than a certain threshold value, the measured data is available, otherwise, the measured data is abandoned.
6. A method for spatial gamma dose rate radiation field measurement as claimed in claim 5 wherein: the timer is timed for 4.5 seconds, and in the set 4.5S timer and timer event, the dosimeter sends dose rate data at a speed of 1/S, and in the process, 4 dose rate information is received, target information is extracted, and an average dose rate value is obtained.
7. A measurement device for use in a method of spatial gamma dose rate radiation field measurement as claimed in any one of claims 1 to 6, wherein: the measuring device comprises a total station, a measuring rate instrument, a computer and upper computer software installed on the computer, wherein the total station is in communication connection with the computer through a USB data line, and the measuring rate instrument is in communication connection with the computer through wireless.
8. A measurement apparatus for a spatial gamma dose rate radiation field as claimed in claim 7 wherein: the measuring rate instrument is wirelessly connected with the computer through a data acquisition processing unit and a Bluetooth module.
9. A measurement apparatus for spatial gamma dose rate radiation fields as claimed in claim 7 or claim 8, wherein: the rate meter includes an inner probe and an outer probe.
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