Method and device for controlling an ionization chamber

Abstract

The application discloses a control method and device of an ionization chamber, which calibrates the positioning distance of a measuring device when the measuring device is in a connection state, carries out leakage measurement on the ionization chamber in the calibrated measuring device, and ensures that the ionization chamber meets the measurement standard. Under the condition that the ionization chamber meets the measurement standard, the ionization chamber is controlled to automatically measure the particle source water absorbing dose through an automatic measurement program.

Description

Technical Field

[0001] This application relates to the field of control and processing technology for extrapolation ionization chambers, and more specifically, to a control method and apparatus for an ionization chamber. Background Technology

[0002] To achieve absolute measurement of the absorbed dose of particle source water, an extrapolation ionization chamber is required. By changing the electrode spacing of the extrapolation ionization chamber, the ultimate goal of absolute measurement of the absorbed dose of particle source water can be achieved.

[0003] However, existing extrapolation ionization chambers are generally traditional small-volume extrapolation ionization chambers, which are manually adjustable. Using manual adjustment of the extrapolation ionization chamber for absolute measurement of the absorbed dose of particle source water has the following drawbacks:

[0004] On the one hand, the frequent entry and exit of measurement personnel into the radiation field environment can affect the changes in the measurement environment, and the measurement personnel are at risk of radiation. On the other hand, the accuracy of manually adjusting the electrode spacing is also inconsistent due to the operator's own condition and the differences in the technical level among the operators, resulting in low absolute measurement accuracy and low measurement efficiency of particle source water absorbed dose.

[0005] Therefore, how to avoid the risk of radiation exposure to the measurement personnel during the absolute measurement of the absorbed dose of the particle source water by adjusting the extrapolation ionization chamber, and how to improve the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water are the problems that this application urgently needs to solve. Summary of the Invention

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

[0007] To achieve the above objectives, the disclosed technical solution is as follows:

[0008] The first aspect of this 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] Leakage current measurement was performed on the ionization chamber of the calibrated measuring equipment to ensure that the ionization chamber met 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 the particle source water.

[0012] Preferably, when connected to the measuring device, calibrating the positioning distance of the measuring device includes:

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

[0014] After connecting to the measuring device, if the connected measuring device is detected in the operation area of ​​the control interface, it is confirmed that the device is connected.

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

[0016] The measurement parameters include at least the electrode spacing and step spacing values, and the source rotation speed, the number of measurement groups, the measurement time for each group, and the allowable leakage current range.

[0017] Preferably, the step of performing leakage current measurement on the ionization chamber in the calibrated measuring device to ensure that the ionization chamber meets the measurement standards includes:

[0018] 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;

[0019] Compare the actual leakage current value with the preset leakage current value;

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

[0021] Preferred options also include:

[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, under the condition that the ionization chamber meets the measurement standards, the automated measurement of the particle source water absorption dose is controlled by an automatic measurement program, including:

[0024] Under the condition that the ionization chamber meets the measurement standards, the shutter of the ionization chamber is opened to trigger the operation of the automatic measurement program written in a preset programming language;

[0025] For each preset measurement group, the automatic measurement program and the preset measurement group control the ionization chamber to automatically measure the absorbed dose of the particle source water until each preset measurement group completes the measurement, and the measurement results are obtained and displayed in the measurement result display area of ​​the control interface.

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

[0027] A second aspect of this application discloses a control device for an ionization chamber, the device being used in a control system, the device comprising:

[0028] The calibration unit is used to calibrate the positioning distance of the measuring device when it is connected to the measuring device.

[0029] The leakage current measurement unit is used to measure the leakage current of the ionization chamber in the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards.

[0030] An automated measurement unit is used to automatically measure the absorbed dose of particle source water by controlling the ionization chamber through an automatic measurement program, provided that the ionization chamber meets the measurement standards.

[0031] Preferably, the calibration unit includes:

[0032] The connection module is used to connect to the power supply, electrometer, thermometer, hygrometer, and ionization chamber in the measuring equipment, respectively.

[0033] The first determining module is used to determine that the device is in a connected state if the connected measuring device is detected in the operation area of ​​the control interface after the device is connected.

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

[0035] Preferably, the leakage current measurement unit includes:

[0036] The acquisition module is used to close the shutter of the ionization chamber in the measuring device to acquire the actual leakage current value of the calibrated ionization chamber through the electrometer;

[0037] The comparison module is used to compare the actual leakage current value with the preset leakage current value;

[0038] The second determining 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] Preferred options also include:

[0040] 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 to return to the step of comparing the actual leakage current value with the preset leakage current value.

[0041] Preferably, the automated measurement unit includes:

[0042] The trigger module is used to open the shutter of the ionization chamber when the ionization chamber meets the measurement standards, so as to trigger the operation of the automatic measurement program written in a preset programming language.

[0043] An automated measurement module is used to control the ionization chamber to automatically measure the absorbed dose of the particle source water for each preset measurement group through the automatic measurement program and the 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 electrode spacing measurement.

[0044] As can be seen from the above technical solution, this application discloses a control method and device for an ionization chamber. When connected to a measuring device, the positioning distance of the measuring device is calibrated, and leakage current measurement is performed on the ionization chamber in the calibrated measuring device 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 automatically controlled by an automatic measurement program to automatically measure the absorbed dose of the particle source water. With the above solution, there is no need for operators to enter and exit the test environment of the ionization chamber to manually adjust the electrode spacing to complete the measurement of the absorbed dose of the particle source water. It is only necessary to write an automatic measurement program to remotely realize functions such as ionization chamber shutter opening and closing, particle source rotation, ionization chamber electrode spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the voltage of the high voltage electrode and the grid. Thus, the ionization chamber is remotely controlled by the automatic measurement program to perform fully automated measurement of the absorbed dose of the particle source water. This avoids the risk of radiation to the measuring personnel during the absolute measurement of the absorbed dose of the particle source water by adjusting the extrapolation ionization chamber, and avoids measurement errors caused by human factors in the measurement of the absorbed dose of the particle source water, thereby improving the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of the control system disclosed in the embodiments of this application;

[0047] Figure 2 This is a schematic diagram of the mechanical structure of the ionization chamber disclosed in an embodiment of this application;

[0048] Figure 3 This is a schematic flowchart of a control method for an ionization chamber disclosed in an embodiment of this application;

[0049] Figure 4 This is a schematic diagram of the control interface of the control system disclosed in the embodiments of this application;

[0050] Figure 5 This is a schematic flowchart of another control method for an ionization chamber disclosed in an embodiment of this application;

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

[0052] Figure 7 This is a schematic diagram of the structure of the electronic device disclosed in the embodiments of this application. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] As the background technology shows, existing extrapolation ionization chambers are generally traditional small-volume extrapolation ionization chambers, which are manually adjustable. Using manual adjustment of the extrapolation ionization chamber for absolute measurement of the absorbed dose of particle source water has the following drawbacks: Firstly, frequent entry and exit of the measurement personnel into the radiation field can affect the measurement environment and pose a radiation risk to the personnel; secondly, the accuracy of manually adjusting the electrode spacing is inconsistent due to variations in the operator's condition and skill level, resulting in low accuracy and efficiency in the absolute measurement of the absorbed dose of the particle source water. Therefore, how to avoid the risk of radiation exposure to the measurement personnel during the adjustment of the extrapolation ionization chamber for absolute measurement of the absorbed dose of the particle source water, and how to improve the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water, are the problems that this application urgently needs to solve.

[0056] To address the aforementioned problems, this application discloses a control method and apparatus for an ionization chamber. This eliminates the need for operators to manually adjust the electrode spacing within the ionization chamber's testing environment to measure the absorbed dose of the particle source water. Instead, an automated measurement program is programmed to remotely control functions such as ionization chamber shutter operation, particle source rotation, electrode spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changes to the high-voltage electrode and grid voltage. This fully automated measurement of the absorbed dose of the particle source water is achieved through remote control of the ionization chamber. This avoids the risk of radiation exposure to personnel during the absolute measurement of the absorbed dose of the particle source water by adjusting the extrapolated ionization chamber, and also avoids measurement errors caused by human factors, thus improving the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water. The specific implementation is illustrated in the following embodiments.

[0057] refer to Figure 1 The diagram shown is a structural schematic of the control system (i.e., the Programmable Logic Controller (PLC) control system) disclosed in the embodiments of this application.

[0058] Figure 1 In the process, the control system can control the shutter switch (speed adjustable), particle source rotation, electrode spacing adjustment, as well as the functions of reading operating temperature and humidity data, reading ionization signals, changing grid high voltage, changing high voltage electrode high voltage, data storage, and automatic measurement.

[0059] Figure 1 The connection relationships between the measuring equipment (ionization chamber, electrometer, high-voltage power supply (grid), high-voltage power supply (high-voltage electrode), temperature, humidity and barometric pressure measurement system) and the control system are as follows:

[0060] The changes in electrode spacing, shutter switching, and particle source rotation within the ionization chamber are controlled by a control system, which can be connected to the control software via a network cable. The main mechanical structure of the ionization chamber is as follows: Figure 2 As shown.

[0061] The overall ionization chamber mechanical components include the shutter, wire harness aperture, front-end housing, water phantom (front plate), water phantom (rear plate), high-voltage electrode, grid, grid segmentation block, collecting electrode, outer shielding box, positioning track, and particle source rotation support. A temperature probe was added to the ionization chamber design, placed inside the chamber for better measurement of the operating environment temperature.

[0062] The electrometer reading and high-voltage power supply functions can be connected to the control software via the IEE-488 protocol; the protocol for connecting the electrometer reading and high-voltage power supply functions 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; 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] Automatic measurement programs can be written using preset programming languages ​​to remotely realize functions such as ionization chamber shutter switching, particle source rotation, ionization chamber electrode spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changing the high-voltage electrode and gate voltage. The preset programming languages ​​include, but are not limited to, C#.

[0065] Because the measurements involve many repetitive operations and are time-consuming, an automatic measurement program was developed to achieve fully automated measurement of a single particle source, specifically the automated measurement of the water absorbed dose from the particle source. The specific control system and automatic measurement program for achieving automated measurement of the water absorbed dose from the particle source are as follows:

[0066] When the control system and the measuring equipment are connected, the positioning distance of the measuring equipment is calibrated.

[0067] The control system performs leakage current 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 to remotely perform automated measurement of the particle source water absorption dose through an automatic measurement program.

[0069] The beneficial effects of this application's embodiments are as follows: No operator is required to manually adjust the electrode spacing within the ionization chamber testing environment to measure the absorbed dose of the particle source water. Instead, an automatic measurement program is written to remotely control functions such as ionization chamber shutter opening and closing, particle source rotation, ionization chamber electrode spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changes to the high-voltage electrode and grid voltage. This allows for fully automated measurement of the absorbed dose of the particle source water by remotely controlling the ionization chamber. This avoids the risk of radiation exposure to measurement personnel during the absolute measurement of the absorbed dose of the particle source water by adjusting the extrapolated ionization chamber, and also avoids measurement errors caused by human factors, thus improving the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water.

[0070] refer to Figure 3 The diagram illustrates a control method for an ionization chamber disclosed in this application, which is applied to the aforementioned embodiment. Figure 1 The publicly disclosed control system and control method for the ionization chamber mainly include the following steps:

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

[0072] Specifically, when connected to the measuring device, 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 / hygrometer, and ionization chamber in the measuring equipment respectively.

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

[0075] In A2, in response to the measurement system's click command to connect devices, the power supply, electrometer, thermometer, hygrometer, and PLC controller are connected. Once the connection is complete, the operation area changes from unavailable to available, and the connected test devices are displayed.

[0076] The control interface is as follows: Figure 4 As 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; among which, the measurement parameters include at least the electrode spacing and step spacing values, and set the source rotation speed, the number of measurement groups, the measurement time of each group, and the allowable leakage current range.

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

[0079] The electrode spacing and step spacing are limited only by mechanical constraints and user settings. The PS350 high-voltage power supply has a maximum voltage of 5000V and a minimum of 50V, with a minimum voltage step of 1V. The classic value for the source rotation speed is 18° / s. The number of measurement groups and the cumulative charge time for each group can be set by the user as needed.

[0080] S302: Perform leakage current measurement on the ionization chamber of the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards.

[0081] The specific process of performing leakage current measurement on the ionization chamber of the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards 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, the ionization chamber is confirmed to meet the measurement standard.

[0085] The program allows setting a preset leakage current value. If the actual leakage current measured by the electrometer is lower than this value, the leakage current is considered acceptable and the next measurement can be performed; otherwise, the program returns to the leakage current measurement section.

[0086] The preset leakage current value can be set according to the actual situation, and this application does not impose specific limitations.

[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 standards, the ionization chamber is controlled by an automatic measurement program to automatically measure the absorbed dose of the particle source water.

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

[0090] C1: Under the condition that the ionization chamber meets the measurement standards, open the shutter of the ionization chamber to trigger the operation of the automatic measurement program written in a preset programming language.

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

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

[0093] Among them, automated absolute measurement includes at least 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 electrode spacing adjustment measurement.

[0094] The preset measurement group refers to the preset total step size. The measurement is considered complete when all preset total steps have been executed.

[0095] For each corresponding voltage and plate spacing, the control system first closes the shutter to measure the leakage current when it is not open. After the requirements are met, the shutter is opened (if not, the leakage current measurement is repeated), the cumulative charge and time under the current position and voltage are measured, and the data is processed into current values. 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] The allowable leakage current can be set in the automatic measurement program. If the leakage current measured by the electrometer is lower than this value, the leakage current is considered qualified and the next measurement can be performed; otherwise, return to the leakage current measurement section.

[0097] To facilitate understanding of the control process of the ionization chamber, combined with Figure 5 To explain, Figure 5 A flowchart illustrating another control method for an ionization chamber is shown.

[0098] Figure 5 In the middle, automated measurement of the absorbed dose of particle source water began;

[0099] The shutter of the ionization chamber in the measuring device is closed to perform ionization chamber leakage current measurement, that is, to obtain the actual leakage current value of the calibrated ionization chamber through an electrometer.

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

[0101] If the actual leakage current value is less than the preset leakage current value, the ionization chamber is deemed to meet the measurement standard, i.e., it is qualified.

[0102] 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 the particle source water, that is, to adjust and read the electrode spacing, apply high voltage to the grid and high voltage electrode, read and record temperature, humidity and air pressure data, and measure leakage current accumulation.

[0103] In the process of adjusting and reading the electrode spacing, both the electrode spacing and the high voltage are adjusted in a stepping manner. After setting the maximum value, step size and number of steps, the electrode spacing and the high voltage change simultaneously.

[0104] Both the electrode spacing and the high voltage are adjusted in a stepping manner. After setting the maximum value, step size and number of steps, the electrode spacing and the high voltage electrode voltage change simultaneously.

[0105] Open the shutter of the ionization chamber in the measuring device to perform automated measurement of the water absorption dose from the particle source. This involves sequentially rotating the particle source, measuring the cumulative ionization charge, reading and controlling the temperature, humidity, air pressure, and measurement time, performing temperature, humidity, air pressure, and decay corrections, subtracting the current, recording the net ionization, and adjusting the electrode spacing.

[0106] In 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] During the process of adjusting the electrode spacing, the PLC is controlled to move the electrode spacing and the electrode voltage is changed through PS350. After the movement and voltage adjustment are completed, the process returns to the step of adjusting and reading the electrode spacing, until all preset measurement groups have been measured.

[0108] Previously, measurements using an extrapolation ionization chamber required specialized personnel to set voltage, electrode spacing, electrometer parameters, and record experimental data, which was very time-consuming and could pose a risk to operators due to radiation. This new method, however, only requires setting the parameters and then automatically measuring, recording, and completing the experiment.

[0109] This application can reduce measurement errors caused by human factors when measuring the absolute dose of particle source water absorption, and can reduce the radiation dose to operators, thus greatly improving measurement efficiency.

[0110] The beneficial effects of this application's embodiments are as follows: No operator is required to manually adjust the electrode spacing within the ionization chamber testing environment to measure the absorbed dose of the particle source water. Instead, an automatic measurement program is written to remotely control functions such as ionization chamber shutter opening and closing, particle source rotation, ionization chamber electrode spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changes to the high-voltage electrode and grid voltage. This allows for fully automated measurement of the absorbed dose of the particle source water by remotely controlling the ionization chamber. This avoids the risk of radiation exposure to measurement personnel during the absolute measurement of the absorbed dose of the particle source water by adjusting the extrapolated ionization chamber, and also avoids measurement errors caused by human factors, thus improving the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water.

[0111] Based on the above embodiments Figure 3 The present application discloses a control method for an ionization chamber, and also discloses a corresponding control device for an ionization chamber, such as... Figure 6 As shown, the control device for the ionization chamber includes:

[0112] The calibration unit 601 is used to calibrate the positioning distance of the measuring device when it is connected to the measuring device.

[0113] The leakage current measurement unit 602 is used to perform leakage current measurement on the ionization chamber in the calibrated measurement equipment to ensure that the ionization chamber meets the measurement standards.

[0114] The automated measurement unit 603 is used to automatically measure the absorbed dose of particle source water by controlling the ionization chamber through an automatic measurement program, provided that the ionization chamber meets the measurement standards.

[0115] Furthermore, the calibration unit 601 includes:

[0116] The connection module is used to connect to the power supply, electrometer, thermometer, hygrometer, and ionization chamber in the measuring equipment, respectively.

[0117] The first determining module is used to determine that the device is in a connected state if the connected measuring device is detected in the operation area of ​​the control interface after the device is connected.

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

[0119] Furthermore, the leakage current measurement unit 602 includes:

[0120] The acquisition module is used to close the shutter of the ionization chamber in the measuring device to acquire the actual leakage current value of the calibrated ionization chamber through the electrometer;

[0121] The comparison module is used to compare the actual leakage current value with the preset leakage current value.

[0122] The second determining 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.

[0123] Furthermore, the control device for 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 to 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] The trigger module is used to open the shutter of the ionization chamber when the ionization chamber meets the measurement standards, so as to trigger the operation of the automatic measurement program written in a preset programming language.

[0127] The automated measurement module is used to control the ionization chamber to automatically measure the absorbed dose of the particle source water through an automatic measurement program and preset measurement groups until each preset measurement group completes the measurement, and the measurement results are displayed in the measurement result display area of ​​the control interface. 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 electrode spacing measurement.

[0128] The beneficial effects of this application's embodiments are as follows: No operator is required to manually adjust the electrode spacing within the ionization chamber testing environment to measure the absorbed dose of the particle source water. Instead, an automatic measurement program is written to remotely control functions such as ionization chamber shutter opening and closing, particle source rotation, ionization chamber electrode spacing adjustment, temperature and humidity data reading, ionization current data reading and processing, and changes to the high-voltage electrode and grid voltage. This allows for fully automated measurement of the absorbed dose of the particle source water by remotely controlling the ionization chamber. This avoids the risk of radiation exposure to measurement personnel during the absolute measurement of the absorbed dose of the particle source water by adjusting the extrapolated ionization chamber, and also avoids measurement errors caused by human factors, thus improving the accuracy and efficiency of the absolute measurement of the absorbed dose of the particle source water.

[0129] This application also provides a storage medium that includes stored instructions, wherein when the instructions are executed, the device containing the storage medium is controlled to perform the control method for the ionization chamber described above.

[0130] This application also provides an electronic device, the structural schematic diagram of which is shown below. Figure 7 As shown, it specifically includes a memory 701 and one or more instructions 702, wherein one or more instructions 702 are stored in the memory 701 and configured to be executed by one or more processors 703 to perform the control method of the ionization chamber described above.

[0131] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0132] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system-type embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0133] The steps in the methods of the various embodiments of this application can be adjusted, combined, or deleted according to actual needs.

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

[0135] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0136] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A control method for an ionization chamber, characterized in that, The method is applied to a control system, and the method includes: When connected to the measuring device, calibrate the positioning distance of the measuring device; Leakage current measurement was performed on the ionization chamber of the calibrated measuring equipment to ensure that the ionization chamber met 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 the particle source water. The step of calibrating the positioning distance of the measuring device when connected to it includes: Connect to the power supply, electrometer, thermometer, hygrometer, and ionization chamber of the measuring equipment respectively; After connecting to the measuring device, if the connected measuring device is detected in the operation area of ​​the control interface, it is confirmed that the device is connected. While connected to the measuring device, the current position of the measuring device is calibrated, and the measurement parameters are set to complete the calibration process of the positioning distance of the measuring device. The measurement parameters include at least the electrode spacing and step spacing values, and the source rotation speed, the number of measurement groups, the measurement time for each group, and the allowable leakage current range.

2. The method according to claim 1, characterized in that, The process of performing leakage current measurement on the ionization chamber of the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards includes: 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; Compare the actual leakage current value with the preset leakage current value; If the actual leakage current value is less than the preset leakage current value, the ionization chamber is determined to meet the measurement standard.

3. The method according to claim 2, 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.

4. The method according to claim 1, characterized in that, Under the condition that the ionization chamber meets the measurement standards, the automated measurement of the particle source water absorption dose is controlled by an automatic measurement program, including: Under the condition that the ionization chamber meets the measurement standards, the shutter of the ionization chamber is opened to trigger the operation of the automatic measurement program written in a preset programming language; For each preset measurement group, the automatic measurement program and the preset measurement group control the ionization chamber to automatically measure the absorbed dose of the particle source water until each preset measurement group completes the measurement, and the measurement results are obtained and displayed in the measurement result display area of ​​the control interface. Among them, automated measurements include at least particle source rotation measurement, ionization charge accumulation measurement, temperature and humidity measurement, air pressure measurement, decay measurement, leakage current measurement, and electrode spacing measurement.

5. A control device for an ionization chamber, characterized in that, The device is used in a control system, and the device includes: The calibration unit is used to calibrate the positioning distance of the measuring device when it is connected to the measuring device. The leakage current measurement unit is used to measure the leakage current of the ionization chamber in the calibrated measuring equipment to ensure that the ionization chamber meets the measurement standards. An automated measurement unit is used to automatically measure the absorbed dose of particle source water by controlling the ionization chamber through an automatic measurement program, provided that the ionization chamber meets the measurement standards. The calibration unit includes: The connection module is used to connect to the power supply, electrometer, thermometer, hygrometer, and ionization chamber in the measuring equipment, respectively. The first determining module is used to determine that the device is in a connected state if the connected measuring device is detected in the operation area of ​​the control interface after the device is connected. The calibration module is used to calibrate the current position of the measuring device while it is connected to the measuring device, and to set measurement parameters to complete the calibration process of the positioning distance of the measuring device; wherein, the measurement parameters include at least the electrode spacing and step spacing values, and the source rotation speed, the number of measurement groups, the measurement time of each group, and the allowable leakage current range.

6. The apparatus according to claim 5, characterized in that, The leakage current measurement unit includes: The acquisition module is used to close the shutter of the ionization chamber in the measuring device to acquire the actual leakage current value of the calibrated ionization chamber through the electrometer; The comparison module is used to compare the actual leakage current value with the preset leakage current value; The second determining 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.

7. The apparatus according to claim 6, characterized in that, Also includes: 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 to return to the step of comparing the actual leakage current value with the preset leakage current value.

8. The apparatus according to claim 5, characterized in that, The automated measurement unit includes: The trigger module is used to open the shutter of the ionization chamber when the ionization chamber meets the measurement standards, so as to trigger the operation of the automatic measurement program written in a preset programming language; An automated measurement module is used to control the ionization chamber to automatically measure the absorbed dose of the particle source water for each preset measurement group through the automatic measurement program and the 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 electrode spacing measurement.

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