Mobile Radiography Antenna Layout for Stable Wireless Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile radiography apparatuses face challenges in maintaining stable wireless communication due to the rotation of the C-arm and movement of the carriage, which affects the relative position between the antenna and the external apparatus, leading to unstable radio wave transmission.
Innovation Solution
The antenna is positioned on a support part that remains unchanged relative to the arm's rotation, allowing it to maintain a consistent radiation direction and be adjustable to align with the external apparatus, using a 60 GHz frequency band for wireless communication, and incorporating an orientation adjustment mechanism with sensors and actuators to optimize antenna orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the antenna is provided at the upper end of the arm to avoid radio wave blocking, then the communication stability is improved, but the relative position between the external apparatus and the antenna changes due to arm rotation, making stable communication difficult
Solution Approach 1:
The system is divided into two independent antenna mounting locations: the arm (for radiation image transmission) and the body part (for control signal transmission). This segmentation allows each antenna to be optimized for its specific function without being affected by arm rotation, resolving the contradiction between avoiding radio wave blocking and maintaining communication stability.
Solution Approach 2:
The body part serves as an intermediary structure that remains stationary relative to the external apparatus while the arm rotates. By mounting one antenna on the body part rather than the arm, the system eliminates the relative position change issue caused by arm rotation, ensuring stable communication for control signals.
2Reliability
If the antenna is fixed to a location other than the arm to maintain stable communication, then the relative position stability is improved, but the carriage movement cannot be handled, making stable communication difficult
Solution Approach 1:
The system uses two antennas with different degrees of freedom: the arm-mounted antenna moves with the arm for radiation image transmission, while the body part-mounted antenna remains relatively stationary for control signal transmission. This dynamic configuration allows the system to adapt to both arm rotation and carriage movement while maintaining communication stability.
Solution Approach 2:
The dual-antenna system provides multi-functionality: one antenna handles radiation image data transmission when the arm is in use, while the other antenna ensures continuous control signal transmission regardless of arm position or carriage movement. This universal approach resolves the contradiction between communication stability and mobility adaptation.
3Device complexity
If a single antenna is used for both radiation image transmission and control signal transmission, then the device complexity is reduced, but the communication quality deteriorates due to interference between different signal types
Solution Approach 1:
The communication function is segmented into two independent channels: one antenna on the arm for radiation image transmission and another antenna on the body part for control signal transmission. This segmentation eliminates signal interference while maintaining manageable device complexity through clear functional separation.
Solution Approach 2:
Each antenna is optimized for its specific location and function: the arm-mounted antenna is positioned to avoid radio wave blocking during radiation imaging, while the body part-mounted antenna is positioned to maintain stable communication with the external apparatus. This local optimization resolves the contradiction between device simplicity and communication quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration ensures stable wireless communication during arm rotation and carriage movement by maintaining consistent radio wave direction and adjusting antenna orientation, enhancing communication quality and reliability.
Implementation Method 1
an antenna 27 that emits a radio wave for wirelessly communicating with an external apparatus
Data Source
AI summary
Provided is a mobile radiography apparatus capable of performing relatively stable wireless communication even in a case in which the mobile radiography apparatus is moved due to traveling of a carriage or an arm is rotated.A mobile radiography apparatus includes a radiation source, a radiation image detector that detects a radiation image of a subject by receiving radiation emitted from the radiation source and transmitted through the subject, an arm that holds the radiation source and the radiation image detector, a body part to which the arm is rotatably attached, a carriage on which the body part is mounted, and an antenna that emits a radio wave for wirelessly communicating with an external apparatus, the antenna being provided in a portion in which a radiation direction of the radio wave is not changed even in a case in which the arm is rotated and capable of changing the radiation direction of the radio wave.