X-ray Movable Carriage Deceleration Control
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Solution Overview
Problem
Conventional X-ray apparatuses for round visit experience sudden stops when braking, leading to shock, potential operator collisions, and floor damage due to immediate electromagnetic brake engagement, especially at high speeds.
Innovation Solution
Incorporating a deceleration control device that manages deceleration through switching elements to apply short brakes or reverse motor current, allowing for smoother stops before engaging the brakes, thereby reducing shock and ensuring operator safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If electromagnetic brakes are immediately engaged to stop the apparatus, then stopping distance is reduced, but shock and vibration increase causing operator safety issues and floor damage
Solution Approach 1:
The motor is used to perform preliminary deceleration before the electromagnetic brake is engaged. The control unit first commands the motor to reduce speed, then subsequently activates the brake for complete stopping. This preliminary action by the motor prevents sudden shock while achieving efficient stopping.
Solution Approach 2:
The motor acts as an intermediary between the brake operation and the moving carriage. Instead of directly engaging the brake on the moving carriage, the control unit mediates by first using motor deceleration, then applying the brake. This intermediary action smooths the stopping process and reduces harmful shock.
2Productivity
If the brake lever is released in a high-speed state, then stopping response is improved, but sudden stop causes operator collision risk
Solution Approach 1:
When the brake lever is released during high-speed movement, the control unit immediately commands motor deceleration as a preliminary action before engaging the electromagnetic brake. This ensures smooth speed reduction even when stopping is urgently required, preventing operator collision while maintaining rapid stopping response.
3Productivity
If immediate braking is applied, then stopping efficiency is improved, but floor impairment occurs due to strong friction
Solution Approach 1:
The motor performs preliminary deceleration before the electromagnetic brake is engaged, reducing the speed and kinetic energy of the apparatus. This preliminary action lessens the friction force required during braking, preventing floor damage while maintaining efficient stopping.
Solution Approach 2:
The motor's deceleration capability is converted into a beneficial pre-braking phase. By using the motor to reduce speed first, the subsequent brake engagement requires less friction force, transforming what would be a harmful high-friction event into a controlled, floor-friendly stopping process.
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
The deceleration control device prevents sudden stops, minimizing shock and floor damage, ensuring a safer and more controlled braking process for the X-ray apparatus and operators.
Implementation Method 1
traveling motors... the motors can rotate to cause forward and backward movements
Implementation Method 2
Electromagnetic brakes are attached to traveling drive wheels, and the CPU outputs a brake drive command to the electromagnetic brakes... the traveling drive wheels connected to the motors are completely locked by the electromagnetic brakes
Data Source
AI summary
With an X-ray apparatus for round visit of this invention, when a brake operation is carried out, a CPU performs deceleration control (braking current control at c and short brake control at e) of a movable carriage instead of immediately driving electromagnetic brakes, and drives the electromagnetic brakes at time f. Therefore, a great shock does not occur to the apparatus, and there is no possibility of the operator colliding with the apparatus. Since the deceleration control of the movable carriage is carried out in advance, the apparatus does not stop suddenly and does not impair the floor. As a result, the X-ray apparatus for round visit is realized, in which no great shock occurs to the apparatus at times of deceleration, and which is also safe for the operator.