Ionization chamber control method and device

Abstract

The invention discloses an ionization chamber control method and device, and the method comprises the steps: calibrating the positioning distance of measurement equipment when the ionization chamber is in a connection state with the measurement equipment, carrying out the electric leakage measurement of the ionization chamber in the calibrated measurement equipment, guaranteeing that the ionization chamber meets the measurement standard, and carrying out the electric leakage measurement of the ionization chamber under the condition that the ionization chamber meets the measurement standard. And the ionization chamber is controlled by an automatic measurement program to automatically measure the water absorbed dose of the particle source.

Description

Technical Field

[0001] The present application relates to the technical field of control and processing of an extrapolated ionization chamber, and more specifically, to a control method and device for an ionization chamber. Background Art

[0002] In order to achieve absolute measurement of the particle source water absorption dose, an extrapolation ionization chamber is required. By replacing different electrode plate spacings in the extrapolation ionization chamber, the ultimate absolute measurement of the particle source water absorption dose can be achieved.

[0003] However, the existing extrapolation ionization chamber is generally a traditional small-volume extrapolation ionization chamber, which is manually adjusted. The manual adjustment of the extrapolation ionization chamber to perform absolute measurement of the absorbed dose of the particle source water has the following disadvantages:

[0004] On the one hand, the frequent entry and exit of measurement personnel in the radiation field environment will affect the changes in the measurement environment and the measurement personnel are at risk of radiation; on the other hand, the accuracy of manual adjustment of the plate spacing cannot maintain consistent stability due to the operator's own state and the differences in technical levels among operators, resulting in low accuracy and low measurement efficiency in the absolute measurement of the particle source water absorbed dose.

[0005] Therefore, how to avoid the risk of radiation exposure to measurement personnel during the process of adjusting the extrapolation ionization chamber to perform absolute measurement of particle source water absorption dose, and how to improve the accuracy and efficiency of absolute measurement of particle source water absorption dose, are issues that need to be urgently addressed in this application. Summary of the invention

[0006] In view of this, the present application discloses a control method and device for an ionization chamber, which aims to avoid the risk of radiation to measurement personnel in the process of adjusting an extrapolated ionization chamber to perform absolute measurement of particle source water absorption dose, and to avoid measurement errors caused by human factors when measuring particle source water absorption dose, thereby improving the accuracy and measurement efficiency of absolute measurement of particle source water absorption dose.

[0007] In order to achieve the above purpose, the disclosed technical solution is as follows:

[0008] In a first aspect, the present application discloses a control method for an ionization chamber, the method being applied to a control system, the method comprising:

[0009] When connected to the measuring device, calibrate the positioning distance of the measuring device;

[0010] Conduct leakage measurement on the ionization chamber in the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards;

[0011] Under the condition that the ionization chamber meets the measurement standards, the ionization chamber is controlled by an automatic measurement program to automatically measure the absorbed dose of particle source water.

[0012] Preferably, when the measuring device is in a connected state, calibrating the positioning distance of the measuring device comprises:

[0013] Connect with the power supply, electrometer, thermometer and hygrometer and ionization chamber in the measuring equipment respectively;

[0014] After connecting with the measuring device, if the connected measuring device is detected in the operation area of ​​the control interface, it is determined that the measuring device is in a connected state;

[0015] When the measuring device is connected, the current position of the measuring device is calibrated and the measuring parameters are set to complete the calibration process of the positioning distance of the measuring device;

[0016] The measurement parameters include at least the plate spacing and step spacing value, the setting source rotation speed, the number of measurement groups, the measurement time of each group and the allowable leakage range.

[0017] Preferably, the leakage measurement of the ionization chamber in the calibrated measuring device to ensure that the ionization chamber meets the measurement standard includes:

[0018] closing a shutter of an ionization chamber in a measuring device to obtain an actual leakage current value of the calibrated ionization chamber through the electrometer;

[0019] Comparing the actual leakage current value with a preset leakage current value;

[0020] If the actual leakage current value is less than the preset leakage current value, it is determined that the ionization chamber meets the measurement standard.

[0021] Preferably, it also includes:

[0022] If the actual leakage current value is greater than or equal to the preset leakage current value, it is determined that the ionization chamber does not meet the measurement standard, and the process returns to the step of comparing the actual leakage current value with the preset leakage current value.

[0023] Preferably, the automatic measurement of the absorbed dose of the particle source water is performed by controlling the ionization chamber through an automatic measurement program under the condition that the ionization chamber meets the measurement standard, including:

[0024] When the ionization chamber meets the measurement standard, the shutter of the ionization chamber is opened to trigger the running of the automatic measurement program written in the preset programming language;

[0025] For each preset measurement group, the ionization chamber is controlled to perform automatic measurement of the particle source water absorption dose through the automatic measurement program and the preset measurement group until each preset measurement group completes the measurement, obtains the measurement result and displays it in the measurement result display area of ​​the control interface;

[0026] Among them, the automated measurement includes at least particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity measurement, air pressure measurement, decay measurement, leakage current measurement and plate spacing measurement.

[0027] In a second aspect, the present application discloses a control device for an ionization chamber, the device being applied to a control system, the device comprising:

[0028] A calibration unit, used for calibrating the positioning distance of the measuring device when the measuring device is in a connected state;

[0029] A leakage current measurement unit is used to perform leakage current measurement on the ionization chamber in the calibrated measuring device to ensure that the ionization chamber meets the measurement standards;

[0030] The automatic measuring unit is used to control the ionization chamber to automatically measure the absorbed dose of particle source water through an automatic measuring program under the condition that the ionization chamber meets the measuring standard.

[0031] Preferably, the calibration unit comprises:

[0032] A connection module, used to respectively connect with a power supply, an electrometer, a thermometer and a ionization chamber in the measuring device;

[0033] A first determination module is used to determine that the connected measuring device is in a connection state if the connected measuring device is detected in the operation area of ​​the control interface after the connection with the measuring device is established;

[0034] The calibration module is used to calibrate the current position of the measuring device and set the measurement parameters when the measuring device is connected to the measuring device to complete the calibration process of the positioning distance of the measuring device; wherein the measurement parameters at least include the plate spacing and step spacing value, set the source rotation speed, the number of measurement groups, the measurement time of each group and the allowable leakage range.

[0035] Preferably, the leakage measurement unit comprises:

[0036] An acquisition module, used for closing a shutter of an ionization chamber in a measuring device, so as to acquire an actual leakage current value of the calibrated ionization chamber through the electrometer;

[0037] A comparison module, used for comparing the actual leakage current value with a preset leakage current value;

[0038] The second determination module is used to determine that the ionization chamber meets the measurement standard if the actual leakage current value is less than the preset leakage current value.

[0039] Preferably, it also includes:

[0040] The determination unit is configured to determine that the ionization chamber does not meet the measurement standard if the actual leakage current value is greater than or equal to the preset leakage current value, and return to the step of comparing the actual leakage current value with the preset leakage current value.

[0041] Preferably, the automated measurement unit comprises:

[0042] A trigger module, used for opening a shutter of the ionization chamber under the condition that the ionization chamber meets the measurement standard, so as to trigger the running of an automatic measurement program written in a preset programming language;

[0043] The automated measurement module is used to control the ionization chamber to perform automated measurement of the particle source water absorption dose for each preset measurement group through the automated measurement program and the preset measurement group until each preset measurement group completes the measurement, obtains the measurement result and displays it in the measurement result display area of ​​the control interface; wherein the automated measurement includes at least particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity measurement, air pressure measurement, decay measurement, leakage current measurement and plate spacing measurement.

[0044] Through the above technical scheme, it can be known that the present application discloses a control method and device for an ionization chamber. When the ionization chamber is connected to the measuring device, the positioning distance of the measuring device is calibrated, and the leakage current of the ionization chamber in the calibrated measuring device is measured to ensure that the ionization chamber meets the measurement standard. Under the condition that the ionization chamber meets the measurement standard, the ionization chamber is controlled by the automatic measurement program to perform the automatic measurement of the particle source water absorption dose. Through the above scheme, there is no need for the operator to enter and exit the test environment of the ionization chamber to manually adjust the plate spacing to complete the measurement of the particle source water absorption dose. It is only necessary to write an automatic measurement program to remotely realize the functions of ionization chamber shutter switch, particle source rotation, ionization chamber plate spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the high voltage pole and grid voltage, so that the ionization chamber is remotely controlled by the automatic measurement program to perform the fully automatic measurement of the particle source water absorption dose, avoiding the risk of radiation to the measuring personnel in the process of adjusting the extrapolated ionization chamber to perform the absolute measurement of the particle source water absorption dose, and avoiding the measurement error caused by human factors when measuring the particle source water absorption dose, thereby improving the accuracy and measurement efficiency of the absolute measurement of the particle source water absorption dose. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0046] Figure 1 A schematic diagram of the structure of a control system disclosed in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the mechanical structure of the ionization chamber disclosed in the embodiment of the present application;

[0048] Figure 3 A schematic flow chart of a control method for an ionization chamber disclosed in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of a control interface of a control system disclosed in an embodiment of the present application;

[0050] Figure 5 A schematic flow chart of another ionization chamber control method disclosed in an embodiment of the present application;

[0051] Figure 6 A schematic diagram of the structure of a control device for an ionization chamber disclosed in an embodiment of the present application;

[0052] Figure 7 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0055] As can be seen from the background technology, the existing extrapolation ionization chamber is generally a traditional small-volume extrapolation ionization chamber, and the traditional small-volume extrapolation ionization chamber is manually adjusted. There are the following disadvantages in performing absolute measurement of particle source water absorption dose by manually adjusting the extrapolation ionization chamber: on the one hand, due to the frequent entry and exit of the radiation field environment by the measurement personnel, it will affect the change of the measurement environment, and the measurement personnel are at risk of radiation; on the other hand, the accuracy of manually adjusting the plate spacing cannot maintain consistent stability due to the operator's own state and the technical level differences between the operators, resulting in low accuracy and low measurement efficiency of the absolute measurement of the particle source water absorption dose. Therefore, how to avoid the risk of radiation to the measurement personnel in the process of adjusting the extrapolation ionization chamber to perform absolute measurement of the particle source water absorption dose, and to improve the accuracy and measurement efficiency of the absolute measurement of the particle source water absorption dose, is a problem that the present application urgently needs to solve.

[0056] In order to solve the above problems, the present application discloses a control method and device for an ionization chamber, which does not require an operator to enter and exit the test environment of the ionization chamber to manually adjust the plate spacing to complete the measurement of the particle source water absorption dose. It only needs to write an automatic measurement program to remotely realize the functions of ionization chamber shutter switch, particle source rotation, ionization chamber plate spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the high voltage pole and grid voltage, so as to remotely control the ionization chamber through the automatic measurement program to perform fully automated measurement of the particle source water absorption dose, avoid the risk of radiation to the measurement personnel in the process of adjusting the extrapolated ionization chamber to perform the absolute measurement of the particle source water absorption dose, and avoid the measurement error caused by human factors when measuring the particle source water absorption dose, thereby improving the accuracy and measurement efficiency of the absolute measurement of the particle source water absorption dose. The specific implementation method is specifically described by the following embodiments.

[0057] refer to Figure 1 , which is a schematic diagram of the structure of a control system (i.e., a programmable logic controller (PLC) control system) disclosed in an embodiment of the present application.

[0058] Figure 1 In the process, the control system can control the shutter switch (speed adjustable), particle source rotation, plate spacing adjustment, as well as run the temperature and humidity data reading function, ionization signal reading function, change the grid high voltage, change the high voltage to the extreme high voltage, data storage function, automatic measurement function, etc.

[0059] Figure 1 The connection relationship between the measuring equipment (ionization chamber, electrometer, high voltage power supply (grid), high voltage power supply (high voltage pole), temperature, humidity and air pressure measurement system) and the control system is as follows:

[0060] The change of the plate spacing, shutter switch and particle source rotation in the ionization chamber are controlled by the control system, and the control system and the control software can be connected by a network cable. Figure 2 shown.

[0061] The overall mechanical structure of the ionization chamber includes shutter, beam aperture, front housing, water phantom (front plate), water phantom (rear plate), high voltage pole, grid, grid segmentation block, collector, outer shielding box, positioning track and particle source rotating bracket, etc. In the design, a temperature probe is added to the ionization chamber, and the temperature probe is designed inside the ionization chamber to better measure the working environment temperature of the ionization chamber.

[0062] The electrometer reading and the high voltage power supply function can be connected to the control software via the IEE-488 protocol; wherein the protocol connecting the electrometer reading and the high voltage power supply function to the control software includes but is not limited to the IEE-488 protocol.

[0063] The temperature, humidity and pressure measurement system can be connected to the control software via the RS-485 protocol; wherein the connection protocol between the temperature, humidity and pressure measurement system and the control software includes but is not limited to the RS-485 protocol.

[0064] The automatic measurement program is written in a preset programming language to remotely realize functions such as ionization chamber shutter switch, particle source rotation, ionization chamber plate spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing high voltage pole and grid voltage. The preset programming language includes but is not limited to C# language.

[0065] Since the measurement has many repetitive operations and takes a long time, an automatic measurement program has been written to realize the fully automatic measurement of a single particle source, that is, the automatic measurement of the particle source water absorbed dose. The specific control system and automatic measurement program realize the automatic measurement of the particle source water absorbed dose. The process is as follows:

[0066] When the control system is connected to the measuring device, the positioning distance of the measuring device is calibrated;

[0067] The control system performs leakage measurement on the ionization chamber in the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards;

[0068] Under the condition that the ionization chamber meets the measurement standards, the control system controls the ionization chamber through an automatic measurement program to remotely perform automated measurement of the particle source water absorption dose.

[0069] The beneficial effects of the embodiments of the present application are as follows: there is no need for operators to enter and exit the test environment of the ionization chamber to manually adjust the plate spacing to complete the measurement of the particle source water absorption dose. It is only necessary to write an automatic measurement program to remotely realize the functions of ionization chamber shutter switch, particle source rotation, ionization chamber plate spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the high voltage pole and grid voltage. The ionization chamber is remotely controlled by the automatic measurement program to perform fully automated measurement of the particle source water absorption dose, avoiding the risk of radiation to the measurement personnel in the process of adjusting the extrapolated ionization chamber to perform absolute measurement of the particle source water absorption dose, and avoiding measurement errors caused by human factors when measuring the particle source water absorption dose, thereby improving the accuracy and efficiency of the absolute measurement of the particle source water absorption dose.

[0070] refer to Figure 3 As shown, a control method of an ionization chamber disclosed in an embodiment of the present application is applied to the above-mentioned embodiment. Figure 1 The disclosed control system and the control method of the ionization chamber mainly include the following steps:

[0071] S301: When the measuring device is connected, calibrate the positioning distance of the measuring device.

[0072] Specifically, when the measuring device is in a connected state, the process of calibrating the positioning distance of the measuring device is shown in A1-A3.

[0073] A1: Connect to the power supply, electrometer, thermometer and ionization chamber in the measuring equipment respectively.

[0074] A2: After connecting with the measuring device, if the connected measuring device is detected in the operation area of ​​the control interface, it is determined that the measuring device is in a connected state.

[0075] In A2, in response to the measurement system clicking the instruction to connect the equipment, the power supply, electrometer, thermometer and hygrometer and PLC controller are connected. After the connection is completed, the operation area changes from unavailable to available, and the connected test equipment is displayed.

[0076] The control interface is as follows: Figure 4 shown.

[0077] A3: When connected to the measuring device, calibrate the current position of the measuring device and set the measurement parameters to complete the calibration process of the positioning distance of the measuring device; wherein the measurement parameters at least include the plate spacing and step spacing value, set the source rotation speed, the number of measurement groups, the measurement time for each group, and the allowable leakage range.

[0078] In A3, after calibrating the current position of the measuring device, set the gate, high voltage pole voltage, step voltage value, plate spacing, step spacing value, source rotation speed, number of groups to be measured, measurement time for each group, and allowable leakage range.

[0079] The plate spacing and step spacing are only limited by mechanical limitations and user settings. The maximum voltage value of the PS350 high voltage power supply is 5000V, the minimum value is 50V, the minimum voltage step is 1V, and the classic value of the source rotation speed is 18° / s. The number of measurement groups and the accumulated charge time of each group can be set by the user according to needs.

[0080] S302: Perform leakage measurement on the ionization chamber in the calibrated measuring device to ensure that the ionization chamber meets the measurement standard.

[0081] The specific process of performing leakage measurement on the ionization chamber in the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standard is shown in B1-B3.

[0082] B1: Close the shutter of the ionization chamber in the measuring device to obtain the actual leakage current value of the calibrated ionization chamber through the electrometer.

[0083] B2: Compare the actual leakage current value with the preset leakage current value.

[0084] B3: If the actual leakage current value is less than the preset leakage current value, it is determined that the ionization chamber meets the measurement standard.

[0085] The program can set a preset leakage current value. If the leakage current actually measured by the electrometer is lower than this value, the leakage is considered qualified and the next step of measurement is performed. Otherwise, the program returns to the leakage measurement part.

[0086] Among them, the preset leakage current value is set according to the actual situation, and this application does not make any specific limitation.

[0087] If the actual leakage current value is greater than or equal to the preset leakage current value, it is determined that the ionization chamber does not meet the measurement standard, and the process returns to the step of comparing the actual leakage current value with the preset leakage current value.

[0088] S303: Under the condition that the ionization chamber meets the measurement standard, the ionization chamber is controlled by an automatic measurement program to perform automatic measurement of the particle source water absorption dose.

[0089] Specifically, under the condition that the ionization chamber meets the measurement standards, the process of automatically measuring the particle source water absorption dose by controlling the ionization chamber through the automatic measurement program is shown in C1-C2.

[0090] C1: When the ionization chamber meets the measurement standard, open the shutter of the ionization chamber to trigger the automatic measurement program written in the preset programming language.

[0091] The preset programming languages ​​include but are not limited to C# language.

[0092] C2: For each preset measurement group, the ionization chamber is controlled to perform automatic absolute measurement of the particle source water absorption dose through the automatic measurement program and the preset measurement group until each preset measurement group completes the measurement, obtains the measurement result and displays it in the measurement result display area of ​​the control interface.

[0093] Among them, the automated absolute measurement at least includes particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity correction measurement, air pressure measurement correction, decay measurement correction, leakage current subtraction measurement and plate spacing adjustment measurement.

[0094] The preset measurement group refers to the preset total step length. The measurement is considered completed when all the preset total step lengths are executed.

[0095] For each set of corresponding voltage and plate spacing, the control system first closes the shutter to measure the leakage when the source is not open. After the requirements are met, the shutter is opened (if not met, the leakage measurement is repeated), the accumulated charge and time at the current position and voltage are measured, and the data is processed into current values, and the temperature, humidity, air pressure, position, voltage and other parameters and specific measurement data are recorded, and the results are displayed in the data area on the right side of the control interface, that is, the measurement result display area of ​​the control interface.

[0096] In the automatic measurement program, you can set the size of the allowable leakage current. If the leakage current actually measured by the electrometer is lower than this value, it is considered that the leakage current is qualified and the next measurement is carried out. Otherwise, it returns to the leakage current measurement part.

[0097] In order to facilitate the understanding of the control process of the ionization chamber, combined with Figure 5 To explain, Figure 5 A schematic flow chart of another method for controlling an ionization chamber is shown.

[0098] Figure 5 In the process, the automated measurement of the absorbed dose of particle source water was started;

[0099] Close the shutter of the ionization chamber in the measuring device to measure the leakage of the ionization chamber, that is, obtain the actual leakage current value of the calibrated ionization chamber through the electrometer;

[0100] Compare the actual leakage current value with the preset leakage current value to determine whether the ionization chamber is leaking;

[0101] If the actual leakage current value is less than the preset leakage current value, it is determined that the ionization chamber meets the measurement standard and is qualified;

[0102] Under the condition that the ionization chamber meets the measurement standards, the ionization chamber is controlled by the automatic measurement program to automatically measure the absorbed dose of the particle source water, that is, to adjust and read the plate spacing, the grid and the high voltage pole, read the temperature, humidity and air pressure data and record and measure the leakage current accumulation;

[0103] Among them, in the process of adjusting and reading the plate spacing, the plate spacing and high voltage are adjusted in a step-by-step manner. After setting the maximum value, step length and number of steps, the plate spacing and high voltage voltage change simultaneously;

[0104] The plate spacing and high voltage are both adjusted in a step-by-step manner. After setting the maximum value, step length and number of steps, the plate spacing and high voltage voltage change simultaneously.

[0105] Open the shutter of the ionization chamber in the measuring equipment to automatically measure the absorbed dose of the particle source water, that is, rotate the particle source, measure the ionization charge accumulation, read and discipline the temperature, humidity, air pressure and measurement time, make temperature, humidity, air pressure and decay corrections, deduct the current, record the net ionization and adjust the plate spacing;

[0106] Among them, during the process of temperature, humidity, air pressure and decay correction, the automatic measurement program automatically calculates the correction factor according to the principle of ionizing radiation dosimetry;

[0107] In the process of adjusting the plate spacing, control the PLC to move the plate spacing and change the plate voltage through PS350. After waiting for the movement and voltage adjustment to be completed, return to the step of adjusting and reading the plate spacing until all preset measurement groups are measured.

[0108] In the past, when using an extrapolated ionization chamber for measurement, a person was required to set the voltage, plate spacing, electrometer parameters, etc., and to record the experiment, which was very time-consuming, took up the time of the experimenter, and due to the presence of radiation, would cause certain harm to the operator. However, this application only requires setting the parameters and waiting for it to automatically measure and record until the experiment is completed.

[0109] The present application can reduce the measurement error caused by human factors during the absolute measurement of the particle source water absorption dose, and can reduce the exposure dose of the operator, thereby greatly improving the measurement efficiency.

[0110] The beneficial effects of the embodiments of the present application are as follows: there is no need for operators to enter and exit the test environment of the ionization chamber to manually adjust the plate spacing to complete the measurement of the particle source water absorption dose. It is only necessary to write an automatic measurement program to remotely realize the functions of ionization chamber shutter switch, particle source rotation, ionization chamber plate spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the high voltage pole and grid voltage. The ionization chamber is remotely controlled by the automatic measurement program to perform fully automated measurement of the particle source water absorption dose, avoiding the risk of radiation to the measurement personnel in the process of adjusting the extrapolated ionization chamber to perform absolute measurement of the particle source water absorption dose, and avoiding measurement errors caused by human factors when measuring the particle source water absorption dose, thereby improving the accuracy and efficiency of the absolute measurement of the particle source water absorption dose.

[0111] Based on the above embodiment Figure 3 A control method for an ionization chamber is disclosed, and an embodiment of the present application also discloses a control device for an ionization chamber, such as Figure 6 As shown, the control device of the ionization chamber includes:

[0112] The calibration unit 601 is used to calibrate the positioning distance of the measuring device when the measuring device is in a connected state;

[0113] A leakage current measurement unit 602 is used to perform leakage current measurement on the ionization chamber in the calibrated measurement device to ensure that the ionization chamber meets the measurement standard;

[0114] The automatic measurement unit 603 is used to control the ionization chamber to perform automatic measurement of the particle source water absorption dose through an automatic measurement program under the condition that the ionization chamber meets the measurement standard.

[0115] Furthermore, the calibration unit 601 includes:

[0116] A connection module, used to respectively connect with a power supply, an electrometer, a thermometer and a ionization chamber in the measuring device;

[0117] A first determination module is used to determine that the connected measuring device is in a connection state if the connected measuring device is detected in the operation area of ​​the control interface after the connection with the measuring device is established;

[0118] The calibration module is used to calibrate the current position of the measuring device when it is connected to the measuring device, and set the measurement parameters to complete the calibration process of the positioning distance of the measuring device; wherein the measurement parameters at least include the plate spacing and step spacing value, set the source rotation speed, the number of measurement groups, the measurement time of each group, and the allowable leakage range.

[0119] Furthermore, the leakage measuring unit 602 includes:

[0120] An acquisition module, used for closing a shutter of an ionization chamber in a measuring device, so as to acquire an actual leakage current value of the calibrated ionization chamber through an electrometer;

[0121] A comparison module, used for comparing an actual leakage current value with a preset leakage current value;

[0122] The second determination module is used to determine whether the ionization chamber meets the measurement standard if the actual leakage current value is less than the preset leakage current value.

[0123] Furthermore, the control device of the ionization chamber also includes:

[0124] The determination unit is used to determine that the ionization chamber does not meet the measurement standard if the actual leakage current value is greater than or equal to the preset leakage current value, and return to the step of comparing the actual leakage current value with the preset leakage current value.

[0125] Furthermore, the automated measurement unit 603 includes:

[0126] A trigger module, used for opening a shutter of the ionization chamber under the condition that the ionization chamber meets the measurement standard, so as to trigger the running of an automatic measurement program written in a preset programming language;

[0127] The automated measurement module is used to control the ionization chamber to perform automated measurement of the particle source water absorption dose for each preset measurement group through an automatic measurement program and a preset measurement group until each preset measurement group completes the measurement, obtains the measurement results and displays them in the measurement result display area of ​​the control interface; wherein the automated measurement includes at least particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity measurement, air pressure measurement, decay measurement, leakage current measurement and plate spacing measurement.

[0128] The beneficial effects of the embodiments of the present application are as follows: there is no need for operators to enter and exit the test environment of the ionization chamber to manually adjust the plate spacing to complete the measurement of the particle source water absorption dose. It is only necessary to write an automatic measurement program to remotely realize the functions of ionization chamber shutter switch, particle source rotation, ionization chamber plate spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the high voltage pole and grid voltage. The ionization chamber is remotely controlled by the automatic measurement program to perform fully automated measurement of the particle source water absorption dose, avoiding the risk of radiation to the measurement personnel in the process of adjusting the extrapolated ionization chamber to perform absolute measurement of the particle source water absorption dose, and avoiding measurement errors caused by human factors when measuring the particle source water absorption dose, thereby improving the accuracy and efficiency of the absolute measurement of the particle source water absorption dose.

[0129] An embodiment of the present application further provides a storage medium, which includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the control method of the ionization chamber as described above.

[0130] The present application also provides an electronic device, whose structural diagram is as follows: Figure 7 As shown, it specifically includes a memory 701 and one or more instructions 702, wherein the one or more instructions 702 are stored in the memory 701 and are configured to be executed by one or more processors 703 to execute the one or more instructions 702 to perform the above-mentioned ionization chamber control method.

[0131] For the aforementioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the order of the actions described, because according to the present application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0132] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0133] The steps in the methods of the embodiments of the present application can be adjusted in order, combined, and deleted according to actual needs.

[0134] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0135] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0136] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling an ionization chamber, characterized in that: The method is applied to a control system, and the method comprises: When connected to the measuring device, calibrate the positioning distance of the measuring device; Conduct leakage measurement on the ionization chamber in the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards; Under the condition that the ionization chamber meets the measurement standards, the ionization chamber is controlled by an automatic measurement program to automatically measure the absorbed dose of particle source water.

2. The method according to claim 1, characterized in that: When the measuring device is in a connected state, calibrating the positioning distance of the measuring device comprises: Connect with the power supply, electrometer, thermometer and hygrometer and ionization chamber in the measuring equipment respectively; After connecting with the measuring device, if the connected measuring device is detected in the operation area of ​​the control interface, it is determined that the measuring device is in a connected state; When the measuring device is connected, the current position of the measuring device is calibrated and the measuring parameters are set to complete the calibration process of the positioning distance of the measuring device; The measurement parameters include at least the plate spacing and step spacing value, the setting source rotation speed, the number of measurement groups, the measurement time of each group and the allowable leakage range.

3. The method according to claim 2, characterized in that The leakage measurement of the ionization chamber in the calibrated measuring device to ensure that the ionization chamber meets the measurement standard includes: closing a shutter of an ionization chamber in a measuring device to obtain an actual leakage current value of the calibrated ionization chamber through the electrometer; Comparing the actual leakage current value with a preset leakage current value; If the actual leakage current value is less than the preset leakage current value, it is determined that the ionization chamber meets the measurement standard.

4. The method according to claim 3, characterized in that Also includes: If the actual leakage current value is greater than or equal to the preset leakage current value, it is determined that the ionization chamber does not meet the measurement standard, and the process returns to the step of comparing the actual leakage current value with the preset leakage current value.

5. The method according to claim 1, characterized in that The method controls the ionization chamber to automatically measure the absorbed dose of the particle source water by an automatic measurement program under the condition that the ionization chamber meets the measurement standard, including: When the ionization chamber meets the measurement standard, the shutter of the ionization chamber is opened to trigger the running of the automatic measurement program written in the preset programming language; For each preset measurement group, the ionization chamber is controlled to perform automatic measurement of the particle source water absorption dose through the automatic measurement program and the preset measurement group until each preset measurement group completes the measurement, obtains the measurement result and displays it in the measurement result display area of ​​the control interface; Among them, the automated measurement includes at least particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity measurement, air pressure measurement, decay measurement, leakage current measurement and plate spacing measurement.

6. A control device for an ionization chamber, characterized in that: The device is applied to a control system, and the device comprises: A calibration unit, used for calibrating the positioning distance of the measuring device when the measuring device is in a connected state; A leakage current measurement unit is used to perform leakage current measurement on the ionization chamber in the calibrated measuring device to ensure that the ionization chamber meets the measurement standards; The automatic measuring unit is used to control the ionization chamber to automatically measure the absorbed dose of particle source water through an automatic measuring program under the condition that the ionization chamber meets the measuring standard.

7. The device according to claim 6, characterized in that The calibration unit comprises: A connection module, used to respectively connect with a power supply, an electrometer, a thermometer and a ionization chamber in the measuring device; A first determination module is used to determine that the connected measuring device is in a connection state if the connected measuring device is detected in the operation area of ​​the control interface after the connection with the measuring device is established; The calibration module is used to calibrate the current position of the measuring device and set the measurement parameters when the measuring device is connected to the measuring device to complete the calibration process of the positioning distance of the measuring device; wherein the measurement parameters at least include the plate spacing and step spacing value, set the source rotation speed, the number of measurement groups, the measurement time of each group and the allowable leakage range.

8. The device according to claim 7, characterized in that The leakage measuring unit comprises: An acquisition module, used for closing a shutter of an ionization chamber in a measuring device, so as to acquire an actual leakage current value of the calibrated ionization chamber through the electrometer; A comparison module, used for comparing the actual leakage current value with a preset leakage current value; The second determination module is used to determine that the ionization chamber meets the measurement standard if the actual leakage current value is less than the preset leakage current value.

9. The device according to claim 8, characterized in that Also includes: The determination unit is configured to determine that the ionization chamber does not meet the measurement standard if the actual leakage current value is greater than or equal to the preset leakage current value, and return to the step of comparing the actual leakage current value with the preset leakage current value.

10. The device according to claim 6, characterized in that The automated measuring unit comprises: A trigger module, used for opening a shutter of the ionization chamber under the condition that the ionization chamber meets the measurement standard, so as to trigger the running of an automatic measurement program written in a preset programming language; The automated measurement module is used to control the ionization chamber to perform automated measurement of the particle source water absorption dose for each preset measurement group through the automated measurement program and the preset measurement group until each preset measurement group completes the measurement, obtains the measurement result and displays it in the measurement result display area of ​​the control interface; wherein the automated measurement includes at least particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity measurement, air pressure measurement, decay measurement, leakage current measurement and plate spacing measurement.

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