CN109061717A - A kind of one key of nuclear radiation Calibration Experiment room calibrates control system and its control method - Google Patents

A kind of one key of nuclear radiation Calibration Experiment room calibrates control system and its control method Download PDF

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Publication number
CN109061717A
CN109061717A CN201810866273.2A CN201810866273A CN109061717A CN 109061717 A CN109061717 A CN 109061717A CN 201810866273 A CN201810866273 A CN 201810866273A CN 109061717 A CN109061717 A CN 109061717A
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control
calibrated
trolley
radioactive source
key
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CN109061717B (en
Inventor
程翀
胡玉杰
王杰
郑文祥
张淮超
郭智荣
左亮周
代传波
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719th Research Institute of CSIC
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719th Research Institute of CSIC
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01TMEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00Details of radiation-measuring instruments
    • G01T7/005Details of radiation-measuring instruments calibration techniques
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/10Plc systems
    • G05B2219/15Plc structure of the system
    • G05B2219/15018Communication, serial data transmission, modem
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/10Plc systems
    • G05B2219/15Plc structure of the system
    • G05B2219/15027RS485, MPI multipoint interface, multiple transmitters, receivers connected

Abstract

The present invention relates to technical field of nuclear radiation protection, a kind of one key of nuclear radiation Calibration Experiment room calibration control system and its control method are provided, the system includes active station, controller, data processing display unit, radioactive source controller, trolley, the radioactive source controller is for placing one or more radioactive sources, and control sources and source of exposure establishes pattern field and shielding radioactive source standard of closure field;The trolley adjusts distance of the instrument to be calibrated apart from radioactive source for placing instrument to be calibrated;This method only needs to select conventional true value to be calibrated according to the range ability of instrument, presses " key calibration starting " button, wait it is to be calibrated finish, the data acquiring and recording and final calibration factor of each conventional true value to be calibrated, easy to operate, high reliablity can be obtained.

Description

A kind of one key of nuclear radiation Calibration Experiment room calibrates control system and its control method
Technical field
The present invention relates to technical field of nuclear radiation protection, specifically a kind of one key of nuclear radiation Calibration Experiment room calibration control System and its control method processed.
Background technique
Traditional nuclear radiation Calibration Experiment room, be in the built-in vertical pattern field of calibration chamber, setting one can freely adjust with The trolley of radioactive source distance.Instrument to be calibrated is mounted on trolley objective table, and instrument external data handles display unit.Data Processing display unit is placed in outside calibration chamber, to observe the dose of radiation rate score that instrument measures.Active station is according to pact to be calibrated Determine true value and assign that command console vehicle is mobile and radioactive source switching, makes that trolley runs a certain distance and radioactive source is gone to accordingly Stop when the position of source.Data processing display unit is observed, radiation dose rate data at this time are recorded.In this state with pattern field Conventional true value is compared with the multiple measurement average value of the data, and the calibration parameter of instrument is calculated.Then with same Method records the radiation dose rate data of remaining conventional true value to be calibrated and calculates calibration parameter.
Generally, the above method needs to control trolley movement and control radioactive source sources, and then manually recorded instrument is surveyed The data obtained calculate statistical average, then calculating are compared with conventional true value, obtain the calibration parameter of a conventional true value. In the case where there are multiple conventional true values to be calibrated, need to be repeated several times this process.Entirely calibration process manually participates in relatively more, Troublesome and easy error.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described above, provide a kind of nuclear radiation Calibration Experiment room one key Calibration control system and its control method, this method are only needed to select conventional true value to be calibrated according to the range ability of instrument, be pressed Under " key calibration starting " button, wait it is to be calibrated finish, the data acquiring and recording and most of each conventional true value to be calibrated can be obtained Whole calibration factor, easy to operate, high reliablity.
The purpose of the present invention is implemented by the following technical solutions: a kind of one key of nuclear radiation Calibration Experiment room calibration control system System, which includes active station, controller, data processing display unit, radioactive source controller, trolley;
The active station includes host computer and matched data and assigns the upper computer software of instruction for showing;
The controller includes a processor and two communication modules, processor processes data and instruction, and control trolley is mobile, First communication module configuration is Modbus main website, acquires the radiation dose rate data of data processing display unit, and second logical News model block configuration is Modbus slave station, and data are exchanged with active station and receive instruction;
The data processing display unit connects instrument to be calibrated, to realize the in-site collecting of radiation dose rate data;
The radioactive source controller is for placing one or more radioactive sources, and control sources and source of exposure establishes pattern field With shielding radioactive source standard of closure field;
The trolley adjusts distance of the instrument to be calibrated apart from radioactive source for placing instrument to be calibrated.
In the above-mentioned technical solutions, the processor is Siemens S7-CPU-1214C, and the communication module is Siemens S7-CM-1241。
In the above-mentioned technical solutions, the radioactive source controller uses turntable type structure, is evenly distributed on turntable circumference several A screened room, each radioactive source are individually placed in a screened room of turntable, and screened room is furnished with shield door, are turned by motor control Platform rotation, and shield door open or close is controlled, motor is connected with host computer, is gone to accordingly when needing to source by motor control Stop when the position of source.
In the above-mentioned technical solutions, the trolley includes the instrument desk and running mechanism for placing instrument to be calibrated, By motor control mechanism walking out of shape, motor is connected with host computer.When needing to source by the operation of motor control trolley it is certain away from From when stop.
The present invention also provides a kind of control methods of above-mentioned one key of nuclear radiation Calibration Experiment room calibration control system, including Following steps:
(1) fixed instrument to be calibrated is on trolley instrument desk, and the good network of configuration, closes laboratory after clearing out a gathering place safely in the controller Shield door;
(2) according to the range ability of instrument to be calibrated, several conventional true values to be calibrated are selected;Conventional true value to be calibrated is corresponding with The absolute value of specific radioactive source number and trolley range ability, it is only necessary to seek the radioactive source and operation trolley to the absolute value At distance, conventional true value to be calibrated can be obtained;
(3) the several to be calibrated conventional true values determining in active station selection press next key calibration start button, start scale;
(4) trolley operation and radioactive source controller rotation stop after sourcing to the 1st conventional true value A1 to be calibrated, and controller is every The real-time dosage rate data of data processing display unit acquisition were automatically recorded every t seconds, are recorded 10 times altogether, this 10 times notes are calculated The average value B1 of record show that calibration parameter herein is C1=A1/B1;
(5) trolley operation and radioactive source controller rotation stop after sourcing to the 2nd conventional true value A2 to be calibrated, and controller is every The real-time dosage rate data of data processing display unit acquisition were automatically recorded every t seconds, are recorded 10 times altogether, this 10 times notes are calculated The average value B2 of record show that calibration parameter herein is C2=A2/B2;
(6) repetitive operation, until trolley operation and radioactive source controller rotation are sourced to n-th of conventional true value An to be calibrated Stop, controller automatically recorded the real-time dosage rate data of data processing display unit acquisition every t seconds, recorded 10 altogether It is secondary, the average value Bn of this 10 times records is calculated, show that calibration parameter herein is Cn=An/Bn;
(7) this calibration factor value C=(C1+C2+ ... Cn)/n is calculated by processor.
In the above-mentioned technical solutions, instrument to be calibrated has a certain amount journey, needed before calibration in range ability determine to Calibrate conventional true value, conventional true value to be calibrated be by select different radioactive sources and different instrument apart from radioactive source away from It is realized from value, is the point calibrated in pattern field by National primary standard comparison instrument.
In the above-mentioned technical solutions, the value of n is the integer more than or equal to 3 in step (5).Select several agreements to be calibrated True value, just takes several, generally takes 3.
In the above-mentioned technical solutions, step (4), (5), the value of t is 10 seconds in (6).
In the above-mentioned technical solutions, the process of control trolley operation is as follows:
In the controller, each conventional true value to be calibrated corresponds to a trolley range ability value, and active station selection three is about Determine true value, controller obtains the signal of three conventional true values, so that it is determined that three distance values of trolley operation;According to selection to school These three range ability values are respectively written into three absolute position motion modules by the sequencing of quasi- conventional true value;For the first time Trolley is run using " key calibration starting " button signal as the flag bit for the trolley that brings into operation;Second and later operation The signal that trolley is completed using last time data record can be realized automatic running trolley and arrive as the flag bit for the trolley that brings into operation Of about fixed position.
In the above-mentioned technical solutions, the process that the rotation of control radioactive source controller sources is as follows:
In the controller, each conventional true value to be calibrated corresponds to a radioactive source, and active station selects three conventional true values, control Device processed obtains the signal of three conventional true values, so that it is determined that three radioactive source numbers;When needing to source each time, according to selection to The sequencing set radioactive source number of calibration conventional true value sources flag bit, and the number source is utilized after sourcing each time Digital quantity input signal in place resets this and sources flag bit, source for the first time using " key calibration starting " button signal as Start the flag bit sourced;Second and later the signal completed using last time data record is sourced as the mark for starting to source Will position can be realized and source automatically.
Compared with the prior art, the present invention has the following advantages:
1. selecting conventional true value to be calibrated, after key calibration starting, other operations are not needed.
2. automatically recording data, facilitate to form file;Automatic data processing obtains final calibration factor.
3. recording a data every the t time, it is therefore an objective to wait detector substantially stabilized after reaching conventional true value to be calibrated Afterwards, the data of acquisition are reliable.
Detailed description of the invention
Fig. 1 builds schematic diagram for present system.
Fig. 2 is the button arrangement schematic diagram of active station in the present invention.
Fig. 3 is configuration Modbus main website schematic diagram in the present invention.
Fig. 4 is configuration Modbus slave station schematic diagram in the present invention.
Fig. 5 is that trolley absolute position motion module schematic diagram is controlled in the present invention.
Fig. 6 is to source motion module schematic diagram in the present invention.
Fig. 7 is the setting schematic diagram of sampling interval duration in the present invention.
Fig. 8 be in the present invention at first conventional true value to be calibrated into the condition of interruption and configuration into interrupting schematic diagram.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
The present embodiment builds experimental enviroment as shown in Figure 1.Mainly include active station, controller, data processing display unit, Detector to be calibrated, trolley, source screening arrangement.Communication module all uses RS-485 serial ports to connect, and trolley carries detection to be calibrated Device, controller receive the instruction of active station, then control trolley movement to change detector at a distance from radioactive source, different Distance obtains different size of pattern field and calibrates for detector.
Fig. 2 is the button arrangement schematic diagram of active station.First and second row's button is conventional true value to be selected, conventional true value It is by National primary standard instrumental calibration mistake, accuracy with higher.Each conventional true value is corresponding with determining radioactive source Number and the trolley determined and radioactive source are apart from absolute value.After selected three true value to be calibrated, " key calibration starting " is pressed Button starts scale work at once.When pressing " as soon as key calibration stops " button, current scale work stops.
Fig. 3 is configuration Modbus main website, realizes the acquisition of data.First module is for communication modes are arranged.Communication Mode uses serial communication, baud rate 9600, no parity check position.Second module is the transmission for requests data reading is arranged Mode." M0.1/Clock_5Hz " is the pulse of 5Hz, indicate five times per second send data requesting instructions read data, then Data are stored in the position of " DB1.DBD28/DT1.Soc_Pst "." DB1.DBD28 " is the 28th word in DB1 global data block Save the doubleword address started." MB_ADDR " is that the tributary address of 1 expression data processing display unit is 1."MODE","DATA_ ADDR " combines the data for indicating to read 2 words that acquisition data processing display unit address 1 starts, default with " DATA_LEN " The data of this 2 words are the value of radiation dose rate.
Fig. 4 is configuration Modbus slave station, is realized and active station data exchange.First module is for communication side is arranged Formula.Communication modes use serial communication, baud rate 9600, no parity check position.Second module be for be arranged tributary address and Allow the block accessed." MB_ADDR " is that the tributary address of 2 controllers is 2." MB_HOLD_REG " is " DB16/Date_PLC_ TO_PC " indicates that active station is allowed to access DB16 data block.These data include collecting for controlling the mobile instruction of trolley Dosage rate data, the result etc. obtained after data processing.
Fig. 5 is control trolley absolute position motion module." Axis " is that " DB2 " indicates that the object for needing absolute value mobile is The technique axis " translation shaft " of configuration.Distance including the operation of one week trolley of motor operation in " translation shaft " object of this configuration, And the parameters such as origin position operation rule of trolley, these are all the bases of trolley absolute value operation." Execute " is " mono- key of DB16.DBX206.0/ calibration starting " indicates that starting one key operation, this instruction come from active station button, as shown in Figure 2. Second of move of trolley is finished from first time data record." Positon " is " DB1.DBD78/DT1. distance _ 1 " Indicate the absolute value distance of trolley operation for the first time.This value is the control after active station selectes first conventional true value to be calibrated It is preceding that the distance between the corresponding trolley of this conventional true value and radioactive source are written in " DB1.DBD78/DT1. distance _ 1 " address, Indicate absolute position motion module by this distance operation.Second of absolute value distance run with third time is similarly.
Fig. 6 is to source motion module.It is finished and second in key calibration starting, first conventional true value calibration to be calibrated Conventional true value calibration to be calibrated is required to find specified radioactive source when finishing.It sources and takes the circumference method of operation, travel at the uniform speed, " DB23 " is the block of background data that this sources module, and internal configuration has the relevant parameter to travel at the uniform speed." Axis " is that " DB17/ is sought Source axis " indicates that the object for sourcing needs movement is the technique axis " sourcing axis " of configuration.Movement is sourced to open after starting key calibration Begin to execute, sources axis and rotated with the speed of 10 °/s.After seeking corresponding source, stopping sources movement."DB1.DBW98/DT1.RD_ Count " it is the counting for recording data, value terminates since 0 to 29, records three 30 data of conventional true value to be calibrated altogether.When It when " DB1.DBW98 " is " 10 ", indicates that first group of data record finishes, starts to source for the second time.When " DB1.DBW98 " is " 20 " When, it indicates that second group of data record finishes, starts third time and source.
Fig. 7 is the setting of sampling interval duration.When sampling in progress, " DB1.DBD104/DT1. sampling time " The time interval of write-in is saved, this example is 10 seconds, i.e., it is primary every " DB1.DBX103.3/DT1. sampling " set in 10 seconds, it is used for It is interrupted into primary, acquires a data.
Fig. 8 is at first conventional true value to be calibrated into the condition of interruption and configuration into interruption.It is to be calibrated at first When in conventional true value calibration, trolley operation is finished, and sources operation and finish, and then can be entered number under the sampling period and is 20 interrupt tissue block.Second and third conventional true value to be calibrated are similarly.
It is every to enter primary interruption, just collected data are stored in the internalname of the entitled Data_from_PDU of data block For Dest_D [0..29] array in an element, the address instruction+1 of array after storage, for next time storage prepare. Then 30 obtained data are handled, final calibration factor can be obtained.
Wherein: control trolley absolute position motion module sources motion module, the setting of sampling interval duration, to school It is realized into the condition of interruption and configuration into interruption, data storage etc. by processor at quasi- conventional true value.
The specific calibration process of the present embodiment is as follows:
(1) it according to the good network of configuration in the controller shown in Fig. 1, arranges equipment and closes laboratory shielding after confirming safety Door;
(2) according to the range ability of detector to be calibrated, 3 conventional true values to be calibrated are selected;
(3) the several to be calibrated conventional true values determining in active station selection press " key calibration starting " button, start school It is quasi-;
(4) trolley and radioactive source controller stop after running to the 1st conventional true value A1 to be calibrated, controller every 10 seconds from The real-time dosage rate data of dynamic record data processing display unit acquisition, record 10 times altogether, calculate the flat of this 10 times records Mean value B1 show that calibration parameter herein is C1=A1/B1;
(5) trolley and radioactive source controller stop after running to the 2nd conventional true value A2 to be calibrated, controller every 10 seconds from The real-time dosage rate data of dynamic record data processing display unit acquisition, record 10 times altogether, calculate the flat of this 10 times records Mean value B2 show that calibration parameter herein is C2=A2/B2;
(6) trolley and radioactive source controller stop after running to the 3rd conventional true value An to be calibrated, controller every 10 seconds from The real-time dosage rate data of dynamic record data processing display unit acquisition, record 10 times altogether, calculate the flat of this 10 times records Mean value B3 show that calibration parameter herein is C3=A3/B3;
(7) calibration factor value C=(C1+C2+C3)/3 that this has can be obtained is calculated by processor.
The content being not described in detail in this specification belongs to the prior art well known to those skilled in the art.
Examples detailed above of the invention only examples made by the present invention to clearly illustrate, rather than embodiments of the present invention It limits.For those of ordinary skill in the art, other different forms can also be made on the basis of the above description Variation or variation.Here all embodiments can not be exhaustive.All technical solution of the present inventions that belongs to are amplified Obvious changes or variations out are still in the scope of protection of the present invention.

Claims (9)

1. a kind of one key of nuclear radiation Calibration Experiment room calibrates control system, it is characterised in that: the system includes active station, control Device, data processing display unit, radioactive source controller, trolley;
The active station includes host computer and matched data and assigns the upper computer software of instruction for showing;
The controller includes a processor and two communication modules, processor processes data and instruction, and control trolley is mobile It is sourced with control radioactive source controller, first communication module configuration is Modbus main website, acquires data processing display unit Radiation dose rate data, second communication module configuration is Modbus slave station, and data exchanges with active station and reception instructs;
The data processing display unit connects instrument to be calibrated, to realize the in-site collecting of radiation dose rate data;
The radioactive source controller is for placing one or more radioactive sources, and control sources and source of exposure establishes pattern field With shielding radioactive source standard of closure field;
The trolley adjusts distance of the instrument to be calibrated apart from radioactive source for placing instrument to be calibrated.
2. one key of nuclear radiation Calibration Experiment according to claim 1 room calibrates control system, it is characterised in that: the processing Device is Siemens S7-CPU-1214C, and the communication module is Siemens S7-CM-1241.
3. one key of nuclear radiation Calibration Experiment according to claim 1 room calibrates control system, it is characterised in that: the radiation Source control device uses turntable type structure, several uniformly distributed screened rooms on turntable circumference, and each radioactive source is individually placed at turntable A screened room in, screened room be furnished with shield door, rotated by motor control turntable, and control shield door open or close, electricity Machine is connected with host computer.
4. one key of nuclear radiation Calibration Experiment according to claim 1 room calibrates control system, it is characterised in that: the trolley Including the instrument desk and running mechanism for placing instrument to be calibrated, by motor control, mechanism out of shape walks, motor with it is upper Machine is connected.
5. a kind of control method of one key of nuclear radiation Calibration Experiment as described in claim 1 room calibration control system, feature Be method includes the following steps:
(1) fixed instrument to be calibrated is on trolley instrument desk, and the good network of configuration, closes laboratory after clearing out a gathering place safely in the controller Shield door;
(2) according to the range ability of instrument to be calibrated, several conventional true values to be calibrated are selected;Conventional true value to be calibrated is corresponding with The absolute value of specific radioactive source number and trolley range ability, it is only necessary to seek the radioactive source and operation trolley to the absolute value At distance, conventional true value to be calibrated can be obtained;
(3) the several to be calibrated conventional true values determining in active station selection press next key calibration start button, start scale;
(4) trolley operation and radioactive source controller rotation stop after sourcing to the 1st conventional true value A1 to be calibrated, and controller is every The real-time dosage rate data of data processing display unit acquisition were automatically recorded every t seconds, are recorded 10 times altogether, this 10 times notes are calculated The average value B1 of record show that calibration parameter herein is C1=A1/B1;
(5) trolley operation and radioactive source controller rotation stop after sourcing to the 2nd conventional true value A2 to be calibrated, and controller is every The real-time dosage rate data of data processing display unit acquisition were automatically recorded every t seconds, are recorded 10 times altogether, this 10 times notes are calculated The average value B2 of record show that calibration parameter herein is C2=A2/B2;
(6) repetitive operation, until trolley operation and radioactive source controller rotation are sourced to n-th of conventional true value An to be calibrated Stop, controller automatically recorded the real-time dosage rate data of data processing display unit acquisition every t seconds, recorded 10 altogether It is secondary, the average value Bn of this 10 times records is calculated, show that calibration parameter herein is Cn=An/Bn;
(7) this calibration factor value C=(C1+C2+ ... Cn)/n is calculated by processor.
6. one key of nuclear radiation Calibration Experiment according to claim 5 room calibrates the control method of control system, feature exists In:
The value of n is the integer more than or equal to 3 in step (5).
7. one key of nuclear radiation Calibration Experiment according to claim 5 room calibrates the control method of control system, feature exists The value of t is 10 seconds in: step (4), (5), (6).
8. one key of nuclear radiation Calibration Experiment according to claim 5 room calibrates the control method of control system, feature exists In: the process of control trolley operation is as follows:
In the controller, each conventional true value to be calibrated corresponds to a trolley range ability value, and active station selection three is about Determine true value, controller obtains the signal of three conventional true values, so that it is determined that three distance values of trolley operation;According to selection to school These three range ability values are respectively written into three absolute position motion modules by the sequencing of quasi- conventional true value;For the first time Trolley is run using " key calibration starting " button signal as the flag bit for the trolley that brings into operation;Second and later operation The signal that trolley is completed using last time data record can be realized automatic running trolley and arrive as the flag bit for the trolley that brings into operation Of about fixed position.
9. one key of nuclear radiation Calibration Experiment according to claim 5 room calibrates the control method of control system, feature exists In: the process that control radioactive source controller rotation sources is as follows:
In the controller, each conventional true value to be calibrated corresponds to a radioactive source, and active station selects three conventional true values, control Device processed obtains the signal of three conventional true values, so that it is determined that three radioactive source numbers;When needing to source each time, according to selection to The sequencing set radioactive source number of calibration conventional true value sources flag bit, and the number source is utilized after sourcing each time Digital quantity input signal in place resets this and sources flag bit, source for the first time using " key calibration starting " button signal as Start the flag bit sourced;Second and later the signal completed using last time data record is sourced as the mark for starting to source Will position can be realized and source automatically.
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