Mobile Radiographic Device Slope Braking Control
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Solution Overview
Problem
Conventional mobile radiation devices struggle to safely and efficiently stop on slopes due to inadequate consideration of natural fall forces, leading to prolonged stopping times and potential collisions, and on horizontal pathways, they often experience harsh braking and jouncing.
Innovation Solution
A mobile radiation device equipped with a wheeled platform, a pressure sensor, velocity measurement means, and a brake control system that adjusts braking force based on operator input, using a velocity lowering control mechanism to slow the platform before engaging the brake module, and a memory to adjust braking force based on actual velocity changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the brake module is immediately engaged when the brake lever is operated, then the stopping time is reduced, but the wheeled platform experiences strong jounce and harsh braking
Solution Approach 1:
The system performs preliminary velocity reduction using motor control before engaging the brake module. When the brake lever is operated, the control element first commands the driving element to reduce velocity to a predetermined level, then subsequently engages the brake module to complete the stopping process. This two-stage approach prevents harsh braking and jounce while maintaining acceptable stopping time.
2Object-affected harmful factors
If the brake module is delayed in engagement to reduce jounce, then the stopping time increases, but the device can stop smoothly without harsh braking
Solution Approach 1:
The control element implements preliminary velocity reduction through motor control before brake engagement. This ensures the wheeled platform velocity is reduced to a safe level before the brake module operates, preventing jounce and harsh braking while minimizing the overall stopping time through optimized timing.
Solution Approach 2:
The system continuously monitors velocity using measurement means and adjusts the braking control accordingly. The control element receives velocity feedback and determines the optimal timing for brake module engagement, ensuring smooth stopping while maintaining efficient stopping time through real-time velocity-based decision making.
3Reliability
If conventional braking control is used on slopes, then the device fails to account for natural fall forces, but implementing adaptive control requires additional sensors and processing
Solution Approach 1:
The existing driving element and control element are made multi-functional to handle both horizontal and sloped terrain braking. The control element receives velocity input and automatically adapts the braking strategy based on detected velocity changes, eliminating the need for separate slope detection hardware while ensuring reliable stopping control across different terrain conditions.
Solution Approach 2:
The system uses its own velocity measurement capabilities to self-regulate braking control. By monitoring velocity changes during the braking process, the system automatically detects and compensates for slope conditions without requiring external sensors or complex additional processing, maintaining reliability while avoiding increased complexity.
Data Source
AI summary
An improved configuration of a mobile-type radiographic image pickup device reliably stops on a flat path without play. More specifically, the prevent invention stops reliably on an inclined path. Where a carriage accelerates regardless of that fact that a deceleration control unit has begun to restrict the movement of the carriage, a brake control unit causes a brake device to operate. According to the present invention, if the carriage accelerates regardless of the fact that a deceleration control unit has begun to restrict the movement of the carriage, the brake device is promptly operated, and prevents concern regardless of the application of an instruction to stop the carriage which is travelling on an incline, and prevents the carriage from running for a long period to time.