X-Ray Couch Drive Control for Low-Force Precise Positioning
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Solution Overview
Problem
Existing X-ray diagnostic devices face challenges in operability due to high manual operating forces required for moving the couchtop, especially when loaded with subjects or additional devices, and difficulty in precise positioning during electrically assisted movements.
Innovation Solution
The X-ray diagnostic device incorporates a couch device with a drive mechanism and processing circuitry that acquires weight and deflection data to assist manual movements by adjusting motor force based on operator input, reducing the load and enabling precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the operator moves the couchtop manually, then precise positioning can be achieved, but a large operating force is required especially when the couchtop is loaded
Solution Approach 1:
The patent replaces the purely mechanical manual moving system with an electro-mechanical system. A motor is integrated into the couch device to provide electrical assistance when moving the couchtop, reducing the manual operating force required while maintaining positioning precision through coordinated control of the motor and operator input
2Force
If the operator moves the couchtop electrically, then the operating force is reduced, but precise positioning becomes difficult to achieve
Solution Approach 1:
The patent implements a dynamic control system that adjusts the level of motor assistance based on the operator's input force and the positioning requirements. The system transitions between fully manual and fully electrical modes, providing variable assistance that maintains positioning precision while reducing operating force as needed
Solution Approach 2:
The patent incorporates feedback mechanisms where the control unit monitors the operator's input force and the couchtop's position, adjusting the motor output in real-time. This feedback loop enables precise positioning by continuously comparing the desired position with the actual position and making corrective adjustments
3Weight of moving object
If the couchtop is designed to support heavy loads, then it can accommodate subjects and additional devices, but the operating force required to move it increases
Solution Approach 1:
The patent replaces the mechanical force requirement with an electrical motor system that can dynamically adjust its output based on the actual load. The motor provides sufficient force to move the couchtop even when heavily loaded, eliminating the direct relationship between load capacity and manual operating force
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 solution enhances the operability of couchtop movements by reducing manual effort and allowing for precise positioning, improving the overall usability of the X-ray diagnostic device.
Implementation Method 1
a load sensor that outputs a detection signal indicating a detected value when the weight applied to the couchtop is detected
Implementation Method 2
the magnitude of the force applied to the couchtop manually by the operator is acquired by the drive control function
Data Source
AI summary
An X-ray diagnostic device according to embodiments includes an X-ray tube, an X-ray detector, a couchtop, a drive mechanism, an input interface, and processing circuitry. The X-ray tube emits X-rays to a subject. The X-ray detector detects X-rays transmitted through the subject. The couchtop has the subject placed thereon. The drive mechanism generates the driving force for moving the couchtop. The input interface accepts instruction operations from an operator regarding the movement of the couchtop. The processing circuitry acquires one of a weight applied to the couchtop and a deflection amount of the couchtop, and determines the driving force to be generated by the drive mechanism based on one of the weight and the deflection amount and on the instruction operation.