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Protective device and method of electronic gun beam flow controlling system

A technology of a control system and a protective device, which is applied in the direction of protection against overcurrent, etc., can solve the problems of easy-to-break devices, inability to protect the electronic gun control system, and potential safety hazards, and achieve the effect of improving safety.

Active Publication Date: 2017-06-13
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not disclose a technical solution for ignition protection, and cannot protect the electronic gun control system. Once ignition occurs, it is easy to damage the components in the control system, posing a safety hazard

Method used

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  • Protective device and method of electronic gun beam flow controlling system
  • Protective device and method of electronic gun beam flow controlling system
  • Protective device and method of electronic gun beam flow controlling system

Examples

Experimental program
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Effect test

Embodiment 1

[0020] figure 1 A schematic structural diagram of a protective device for an electron gun beam current control system provided in Embodiment 1 of the present invention. This embodiment is applicable to the case of protecting the electron gun beam current control system. The device can be implemented by means of hardware and / or software accomplish.

[0021] refer to figure 1 The protective device of the electron gun beam current control system provided in this embodiment specifically includes: a current sampling module 1, which is connected to the cathode of the electron gun and the negative high voltage power supply output module 3 respectively, and is used to sample the cathode current of the electron gun to obtain a sampling current; an alarm module 2. Connected to the current sampling module 1, used to judge whether the current circuit sparks according to the sampling current, and output an alarm signal when sparking occurs; the negative high-voltage power supply output mo...

Embodiment 2

[0026] figure 2 A schematic structural diagram of a protective device for an electron gun beam current control system provided in Embodiment 2 of the present invention. On the basis of the above embodiments, this embodiment preferably further optimizes the current sampling module 1 and the alarm module 2. Refer to figure 2 , including the following:

[0027] Preferably, the current sampling module 1 includes a sampling resistor 11, a differential operational amplifier 12, and a first TVS tube 13 (Transient Voltage Suppressor, transient voltage suppressor diode); one end of the sampling resistor 11 is connected to the cathode of the electron gun, and the other end is connected to the negative electrode. High-voltage power supply output module 3; the two input ends of the differential operational amplifier 12 are connected to the two ends of the sampling resistor 11, and the output end is connected to the alarm module 2; the two ends of the first TVS tube 13 are connected to t...

Embodiment 3

[0042] image 3 A schematic structural diagram of a protective device for an electron gun beam current control system provided by Embodiment 3 of the present invention. On the basis of the above embodiments, this embodiment preferably further adds an analog-to-digital-to-analog conversion module 7. Refer to image 3 , including the following:

[0043] The analog-digital-digital-analog conversion module 7 is connected with the current sampling module 1 and the buffer module 5 respectively, and is used to convert the analog sampling current signal output by the current sampling module 1 into a digital sampling current signal, and send it to the buffer module 5; the buffer module 5 is also used for buffering the digital sampling current signal, and reporting the digital sampling current signal to the monitoring module 6 for monitoring. In this way, the multiplexing of the sampling current is realized to monitor the cathode current, without using a third-party collection tool to ...

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PUM

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Abstract

The embodiment of the invention discloses a protective device and method of an electronic gun beam flow controlling system. The device comprises a current collecting module, a warning module and a negative high voltage power output module, wherein the current collecting module is separately connected with a cathode of an electron gun and the negative high voltage power output module and used for sampling the current of the cathode of the electron gun so as to obtain a sampled current; the warning module is connected with the current collecting module and used for judging whether arcing of a current circuit occurs or not according to the sampled current and outputting a warning signal when the arcing occurs; the negative high voltage power output module is connected with the warning module and used for cutting off high-voltage output when receiving the warning signal. By means of the device and method, arcing protection can be conducted on the electronic gun beam flow controlling system, and the safety of the control system is improved.

Description

technical field [0001] The embodiment of the present invention relates to protection circuit technology, in particular to a protection device and method for an electron gun beam current control system. Background technique [0002] The electron gun is a device that works in a vacuum state and accelerates electrons out through high voltage. In the radiotherapy system, when the electron gun is working normally, the size of the cathode current reflects the electronic excitation ability of the electron gun, which is a key indicator for measuring the dose in radiotherapy. At the same time, during the use of the electron gun, due to the deterioration of the vacuum degree, there will be occasional ignition. The cathode voltage and the positive electrode are instantaneously discharged during ignition. The cathode voltage power supply is generally tens of KV, and the positive electrode is PE. The cathode current (up to 100A or more) and voltage fluctuations generated during ignition...

Claims

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Application Information

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IPC IPC(8): H02H3/08
CPCH02H3/08
Inventor 杨延嗣王洪涛王海科
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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