Anticollision protective device for medical electronic linear accelerator

A linear accelerator and protection device technology, applied in the field of electronics, can solve the problems of misjudgment or misoperation, high price, large transmission interference, etc., and achieve the effects of simple control, high reliability and strong anti-interference ability.

Active Publication Date: 2014-10-22
SHENYANG NEUSOFT ZHIRUI RADIOTHERAPY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, this anti-collision method in the prior art has the following disadvantages: the position information of the lifting floor 6 is measured using a wire-guide encoder, which is expensive, and one needs about five thousand yuan; in addition, because the position of the wire-guy encoder is close to the standing wave accelerator The X-ray source, the encoder failure rate is relatively high when

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  • Anticollision protective device for medical electronic linear accelerator
  • Anticollision protective device for medical electronic linear accelerator
  • Anticollision protective device for medical electronic linear accelerator

Examples

Experimental program
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Embodiment 1

[0082] See figure 2 , The figure is a schematic diagram of the collision avoidance device of the medical electronic linear accelerator provided by the present invention.

[0083] The anti-collision device provided in the embodiment of the present invention is provided with an inclination sensor 3 and a limit switch 7;

[0084] It should be noted that the inclination sensor 3 is arranged on the rotating frame and is used to detect the angle of the rotating frame 2.

[0085] The limit switch 7 is set at a predetermined horizontal position, and the predetermined horizontal position is a position where the lifting floor 6 needs to be lowered when the rotating frame 2 is within a predetermined angle range; that is, the rotating frame 2 rotates to a predetermined angle range When the lifting floor 6 is lowered into position, the rotating frame 2 will not collide with the lifting floor 6.

[0086] See image 3 This figure is a schematic diagram of Embodiment 1 of the anti-collision protecti...

Embodiment 2

[0103] The following is a detailed introduction to the composition and working principle of each department in combination with the specific circuit diagram.

[0104] See Figure 4 , The figure is a schematic diagram of the limit switch and signal conditioning circuit provided by the present invention.

[0105] The limit switch S1 includes a static contact COM, a normally closed contact NO1 and a normally open contact NO2;

[0106] The static contact COM is connected to a first power source; it should be noted that the first power source may be +24V.

[0107] When the limit switch S1 is not operating, the normally closed contact NO1 is connected to the static contact COM, and the normally closed contact NO1 serves as the signal output terminal of the limit switch;

[0108] When the limit switch S1 is activated, the normally open contact NO2 is connected to the static contact COM;

[0109] The signal conditioning circuit includes an optocoupler U1B;

[0110] The normally closed contact NO1...

Embodiment 3

[0117] See Figure 5 , The figure is a schematic diagram of the angle judgment circuit provided by the present invention.

[0118] In the embodiment provided by the present invention, two single-axis tilt angle sensors are used to realize the angle detection of the rotating frame in the range of 360°.

[0119] Because a single-axis tilt sensor can measure angles within a range of 180°.

[0120] For example, a single-axis tilt sensor can use SCA60C, the power supply voltage of the tilt sensor is +5V, the measurement range is ±90°, and the corresponding analog voltage output range is 0.5V~4.5V, that is, the output voltage is linearly proportional to the measured angle Relationship.

[0121] It should be noted that the voltage output by the uniaxial tilt sensor corresponds to an angle, and the value of the voltage is different, the corresponding angle is different.

[0122] The inclination sensor includes two single-axis inclination sensors, namely a first single-axis inclination sensor N...

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Abstract

The invention provides an anticollision protective device for a medical electronic linear accelerator. The anticollision protective device includes a limit switch which is arranged at a preset horizontal position which is a position to which a lifting floor needs to descend when a rotating rack is located in a preset angle range, wherein the limit switch judges whether the lifting floor triggers the limit switch; a signal conditioning circuit which sends a first digital signal corresponding to the limit switch to a logic judgment circuit; an inclined-angle sensor which is arranged on the rotating rack to detect the angle of the rotating rack; an angle judgment circuit which sends a control signal to the logic judgment circuit when it is judged that the angle is in the preset angle range; the logic judgment circuit which carries out logic calculation on the first digital signal and the control signal; a control circuit which controls the rotating rack to stop rotating when it is judged the calculation result complies with an collision condition; and the rotating rack which is driven to rotate by a driving motor. All components of the device are realized by pure hardware so that the device is simple to control and free from communication circuits and thus the device is high in anti-interference capability and higher in reliability.

Description

Technical field [0001] The present invention relates to the field of electronic technology, in particular to an anti-collision protection device for a medical electronic linear accelerator. Background technique [0002] At present, the 6MV medical linear accelerator adopts standing wave accelerating tube, which is installed vertically, such as figure 1 As shown, the standing wave acceleration tube is arranged on the treatment head 5, and the treatment head 5 can be rotated under the drive of the rotating gantry 2. It can be understood that the rotating frame 2 can rotate around the rotating shaft 1 within a range of 360°. [0003] Based on medical requirements, there is a requirement for the height between the rotating shaft 1 and the ground plane 8. Therefore, when the rotating gantry 2 is rotated to a vertical position, the horizontal position of the treatment head 5 needs to be lower than the ground plane 8. [0004] Based on this requirement, a lifting floor 6 is set within a ce...

Claims

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Application Information

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IPC IPC(8): H02H5/00H05H7/22
Inventor 邹惟涛田新智柴猛杨洪彪
Owner SHENYANG NEUSOFT ZHIRUI RADIOTHERAPY TECH CO LTD
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