Calibration device for proton heavy ion accelerator control unit

Abstract

The utility model provides a calibration device used for a proton heavy ion accelerator control unit, comprising an analog output unit comprising an analog current output portion and a test portion, the analog current output portion outputting a first current; the input end of the power supply control unit is electrically connected to an analog current output part so that the first current can be input to the power supply control unit, the power supply control unit is used for adjusting the first current to a second current, and the output end of the power supply control unit is electrically connected to the input end of the test part so that the second current can be input to the analog current output part. The second current is output to the testing part, and the output end of the testing part outputs the second current; and the voltage measuring unit is electrically connected to the output end of the testing part and is used for measuring the voltage value of the output end of the testing part. According to the scheme, the calibration time is greatly shortened, the risk of actual operation of the power supply is reduced, and the calibration precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of proton and heavy ion cancer treatment equipment, in particular to a calibration device for a proton and heavy ion accelerator control unit. Background Art

[0002] Proton and heavy ion accelerators use many electromagnets to adjust or guide the beam, and ultimately lead the particles out of the treatment room for patient treatment. The control unit of the key magnet is very complex. For example, the output of the 6 pairs of bending magnets that deflect the beam by 60 degrees must meet the design requirements. If there is a deviation, various problems will arise in the beam led out to the treatment room. These electromagnets are powered by a switching power supply. Since the required switching power supply has high power and long operating time, and the output needs to respond differently at any time according to the particle energy, after the switching power supply has been running for a period of time, its output current may deviate from the normal range and cause a beam position deviation. At this time, the control unit needs to be calibrated to ±15ppm; in addition, the newly replaced control unit also needs to be calibrated.

[0003] The usual calibration method is to directly connect a DCCT (direct current sensor), a current converter and a precision voltmeter to the output end of the power supply for measurement. During this online calibration process, the entire device is in a shutdown state and the whole process takes about 3 hours. In addition, the electromagnetic environment on site will interfere with the output, thereby affecting the calibration accuracy, and multiple repeated measurements are often required. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art and provide a calibration device for a proton and heavy ion accelerator control unit.

[0005] The utility model achieves the above technical effects through the following technical solutions:

[0006] The utility model provides a calibration device for a proton and heavy ion accelerator control unit, the calibration device comprising:

[0007] An analog output unit, comprising an analog current output portion and a testing portion, wherein the analog current output portion outputs a first current;

[0008] A power control unit, wherein an input end of the power control unit is electrically connected to the analog current output unit so that the first current is input to the power control unit, the power control unit is used to adjust the first current to a second current, an output end of the power control unit is electrically connected to an input end of the test unit and outputs the second current to the test unit, and an output end of the test unit outputs the second current;

[0009] A voltage measuring unit is electrically connected to the output end of the test unit and measures a voltage value of the output end of the test unit.

[0010] In this solution, the analog circuit output part of the analog output unit outputs a first current, the power control unit adjusts the first current to a second current according to preset requirements, the second current is output through the test part and the actual voltage value of the second current is measured by the power measurement unit. According to multiple groups of measured voltage values ​​and corresponding preset second current values, the power control unit can be calibrated. This solution is an offline calibration, which greatly shortens the calibration time compared to online calibration, while reducing the risk of actual operation of the power supply, and also improves the calibration accuracy. In addition, this solution does not need to occupy the use time of the proton and heavy ion cancer treatment equipment, and can make the machine time of the proton and heavy ion cancer treatment equipment be used for patient treatment as much as possible.

[0011] Preferably, the calibration device further comprises a test control unit, which is electrically connected to the analog current output unit and is used to control a current value and / or a voltage value of the first current output by the analog current output unit.

[0012] In this solution, the test control unit is used to send a current output signal to the analog current output unit, so that the analog circuit output unit outputs current according to preset requirements.

[0013] Preferably, the calibration device further comprises a calculation unit, which is configured to fit new calibration parameters according to the voltage values ​​measured by the plurality of voltage measurement units and the voltage values ​​output by a plurality of preset power supply control units.

[0014] In this solution, new calibration parameters can be obtained through the above structural settings.

[0015] Preferably, the calculation unit is electrically connected to the power control unit, and sends the new calibration parameter signal to the power control unit.

[0016] In this solution, through the above structural setting, the system can automatically calculate new calibration parameters according to the measured voltage value and write them into the power control unit.

[0017] Preferably, the analog output unit further comprises a box, and the analog current output part and the testing part are arranged in the box.

[0018] In this solution, the box body protects the analog current output unit and the test unit, preventing dust from entering and increasing the service life.

[0019] Preferably, a first output terminal, a second output terminal and a first input terminal are provided on the outside of the box, the first output terminal is connected to the power control unit by wires and outputs the first current, the first input terminal is connected to the power control unit by wires and inputs the second current, and the second output terminal outputs the second current.

[0020] In this solution, the electrical connection between various components is simply and conveniently achieved through the above-mentioned arrangement.

[0021] Preferably, the power control unit further includes a temperature sensor, and the temperature sensor is used to measure the temperature inside the power control unit.

[0022] In this solution, by setting up a temperature sensor, the working status of the analog output unit can be monitored, and the operation can be stopped in time when an abnormality occurs.

[0023] Preferably, the voltage measuring unit is a high-precision voltmeter.

[0024] In this solution, a high-precision voltmeter is used to improve the calibration accuracy, which can reach 10ppm.

[0025] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0026] The positive and progressive effects of the utility model are:

[0027] This solution is an offline calibration, which greatly shortens the calibration time compared to online calibration, reduces the risk of actual operation of the power supply, and improves the calibration accuracy. In addition, this solution does not need to occupy the use time of the proton and heavy ion cancer treatment equipment, so that the machine time of the proton and heavy ion cancer treatment equipment can be used for patient treatment as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art will be more aware of the above and other features and advantages of the present invention.

[0029] Figure 1 It is a schematic diagram of a calibration device according to a preferred embodiment of the utility model.

[0030] The reference numerals are as follows:

[0031] Calibration device 100

[0032] Power control unit 10

[0033] Analog output unit 20

[0034] Analog current output unit 201

[0035] Testing Department 202

[0036] First output terminal 203

[0037] Second output terminal 204

[0038] First input terminal 205

[0039] Voltage measurement unit 30 DETAILED DESCRIPTION

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0041] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0042] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0043] In this article, "one" not only means "only one", but also means "more than one". In this article, "first", "second", etc. are only used to distinguish each other, rather than to indicate their importance and order, or the premise of each other's existence.

[0044] The utility model discloses a calibration device 100 for a proton and heavy ion accelerator control unit. Figure 1 As shown, the calibration device 100 includes: an analog output unit 20, including an analog current output unit 201 and a test unit 202, the analog current output unit 201 outputs a first current; a power control unit 10, the input end of the power control unit 10 is electrically connected to the analog current output unit 201, so that the first current is input to the power control unit 10, the power control unit 10 is used to adjust the first current to the second current, the output end of the power control unit 10 is electrically connected to the input end of the test unit 202, and the second current is output to the test unit 202, and the output end of the test unit 202 outputs the second current; a voltage measuring unit 30, the voltage measuring unit 30 is electrically connected to the output end of the test unit 202, and measures the voltage value of the output end of the test unit 202.

[0045] In this embodiment, the analog circuit output unit of the analog output unit 20 outputs a first current, the power control unit 10 adjusts the first current to a second current according to the preset requirements, the second current is output through the test unit 202 and the actual voltage value of the second current is measured by the power measurement unit. According to multiple groups of measured voltage values ​​and corresponding preset second current values, the power control unit 10 can be calibrated. This scheme is an offline calibration, which greatly shortens the calibration time compared to the online calibration, while reducing the risk of actual operation of the power supply, and also improves the calibration accuracy. In addition, this scheme does not need to occupy the use time of the proton and heavy ion cancer treatment equipment, and can make the machine time of the proton and heavy ion cancer treatment equipment be used for patient treatment as much as possible.

[0046] Specifically, for example, the analog current output unit 201 outputs a first current of 1 mA, the power control unit 10 presets it to adjust to a second current of 10 A and outputs it through the test unit 202, and the voltage measurement unit 30 measures the actual value of the second current in the test unit 202 for calibration.

[0047] The calibration device 100 also includes a test control unit, which is electrically connected to the analog current output unit 201 and is used to control the current value and / or voltage value of the first current output by the analog current output unit 201. The test control unit is used to send a current output signal to the analog current output unit 201 so that the analog circuit output unit outputs current according to preset requirements. Specifically, different first current values ​​will be taken during calibration, for example, measurements are performed every 200 mA, and the first current values ​​output by the analog current output unit 201 can be sequentially changed by the test control unit.

[0048] The calibration device 100 also includes a calculation unit, which fits new calibration parameters according to the voltage values ​​measured by the multiple voltage measurement units 30 and the voltage values ​​output by the multiple preset power control units 10. The new calibration parameters can be obtained through the above structural setting. Specifically, the calibration parameters conform to the function of y=ax+b, and the corresponding parameters can be calculated by obtaining multiple groups of measurement values ​​and preset values ​​every 200 mA.

[0049] The calculation unit is electrically connected to the power control unit 10, and sends a new calibration parameter signal to the power control unit 10. Through the above structure setting, the system can automatically calculate the new calibration parameter according to the measured voltage value and write it into the power control unit 10.

[0050] The analog output unit 20 also includes a box, and the analog current output unit 201 and the test unit 202 are arranged in the box. The box has a protective effect on the analog current output unit 201 and the test unit 202. Avoid dust from entering and increase the service life. The outside of the box is provided with a first output terminal 203, a second output terminal 204 and a first input terminal 205. The first output terminal 203 is connected to the power control unit 10 by wire and outputs a first current. The first input terminal 205 is connected to the power control unit 10 by wire and inputs a second current. The second output terminal 204 outputs a second current. Through the above arrangement, the electrical connection between the various components is simply and conveniently achieved.

[0051] The power control unit 10 also includes a temperature sensor, which is used to measure the temperature inside the power control unit 10. By setting the temperature sensor, the working state of the analog output unit 20 can be monitored, and the operation can be stopped in time when an abnormality occurs. The voltage measurement unit 30 is a high-precision voltmeter. Using a high-precision voltmeter can improve the calibration accuracy, and the calibration accuracy can reach 10ppm.

[0052] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A calibration device for a proton and heavy ion accelerator control unit, characterized in that: The calibration device comprises: An analog output unit, comprising an analog current output portion and a testing portion, wherein the analog current output portion outputs a first current; A power control unit, wherein an input end of the power control unit is electrically connected to the analog current output unit so that the first current is input to the power control unit, the power control unit is used to adjust the first current to a second current, an output end of the power control unit is electrically connected to an input end of the test unit and outputs the second current to the test unit, and an output end of the test unit outputs the second current; A voltage measuring unit is electrically connected to the output end of the test unit and measures a voltage value of the output end of the test unit.

2. The calibration device for a proton and heavy ion accelerator control unit according to claim 1, characterized in that: The calibration device further includes a test control unit, which is electrically connected to the analog current output unit and is used to control a current value and / or a voltage value of the first current output by the analog current output unit.

3. The calibration device for a proton and heavy ion accelerator control unit according to claim 1, characterized in that: The calibration device further comprises a calculation unit, which is configured to fit new calibration parameters according to voltage values ​​measured by the plurality of voltage measurement units and voltage values ​​output by a plurality of preset power supply control units.

4. The calibration device for a proton and heavy ion accelerator control unit according to claim 3, characterized in that: The calculation unit is electrically connected to the power control unit and sends the new calibration parameter signal to the power control unit.

5. The calibration device for a proton and heavy ion accelerator control unit according to claim 1, characterized in that: The analog output unit further includes a box, and the analog current output part and the testing part are arranged in the box.

6. The calibration device for a proton and heavy ion accelerator control unit according to claim 5, characterized in that: The outside of the box is provided with a first output terminal, a second output terminal and a first input terminal, the first output terminal is connected to the power control unit by wires and outputs the first current, the first input terminal is connected to the power control unit by wires and inputs the second current, and the second output terminal outputs the second current.

7. The calibration device for a proton and heavy ion accelerator control unit according to claim 1, characterized in that: The power control unit further includes a temperature sensor, and the temperature sensor is used to measure the temperature inside the power control unit.

8. The calibration device for a proton and heavy ion accelerator control unit according to any one of claims 1 to 7, characterized in that: The voltage measuring unit is a high-precision voltmeter.

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