Direct-Drive Container Module Control for Interference Detection
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Solution Overview
Problem
Existing robotic pharmaceutical preparation systems face challenges in safely and efficiently handling interferences during the movement of container-receiving modules, such as obstacles or human intervention, which can lead to system malfunctions and user safety risks.
Innovation Solution
A direct drive actuation system is employed, where container-receiving modules are directly coupled to motors without intermediate transmission elements, allowing real-time monitoring of electrical current consumption to detect interferences, and a controller modifies system operations based on current consumption deviations to prevent collisions or hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional transmission elements (gears, belts, etc.) are used to drive container-receiving modules, then the system has mechanical advantage and force amplification, but the system loses precision, increases complexity, and cannot detect interferences in real-time
Solution Approach 1:
The patent removes intermediate transmission elements (gears, belts, couplings) from the drive system, directly coupling the motor to the container-receiving module. This extraction eliminates the complexity and measurement errors associated with multiple mechanical components while maintaining the necessary drive functionality through direct motor actuation.
Solution Approach 2:
The patent replaces the traditional mechanical transmission system with an electrical control system that uses motor current consumption as a sensor to detect interferences. Instead of mechanical linkages with physical sensors, the system uses electrical parameters (current draw) to monitor and detect obstacles or interference during module movement.
2Reliability
If traditional mechanical transmission systems are used, then the system has robust force transmission, but real-time interference detection is delayed and system safety is reduced
Solution Approach 1:
The patent implements a feedback mechanism where the motor controller continuously monitors current consumption during module movement. When current exceeds a threshold indicating interference, the system immediately responds by stopping or reversing movement. This closed-loop feedback provides real-time safety monitoring without the time delays inherent in traditional mechanical sensing systems.
Solution Approach 2:
The patent replaces delayed mechanical interference detection (through physical contact sensors or mechanical limit switches) with immediate electrical detection through motor current monitoring. The electrical signal provides instantaneous detection of interference, enabling real-time safety responses before physical damage or hazardous exposure can occur.
3Manufacturing precision
If direct drive actuation is used, then precision and interference detection are improved, but the motor requires higher torque and power
Solution Approach 1:
The patent employs dynamic control of the direct-drive motor, adjusting speed and torque in real-time based on operational requirements. The motor operates at high power only during acceleration or when overcoming interference (detected through current monitoring), and at lower power during steady-state movement, optimizing the balance between positioning precision and power consumption.
Solution Approach 2:
The patent changes the operational parameters of the motor by using variable speed and torque control rather than constant high-power operation. By monitoring current consumption and adjusting motor output dynamically, the system achieves precise positioning without requiring continuously high power, resolving the contradiction between precision and power requirements.
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 approach enhances precision, safety, and efficiency by immediately detecting and responding to interferences, reducing the risk of system failure and user exposure to hazardous materials.
Implementation Method 1
a motor coupled to the container-receiving module for directly driving movement of the container-receiving module along a movement path
Implementation Method 2
circuitry configured to detect electrical current consumption of the at least one motor
Data Source
AI summary
A robotic pharmaceutical preparation system comprising at least one container-receiving module configured to hold at least one container; a motor coupled to the container-receiving module for directly driving movement of the container-receiving module along a movement path; circuitry configured to detect electrical current consumption of the at least one motor; and a controller configured for: receiving an indication from the circuitry regarding the electrical current consumption; determining that an interference exists based on the indication; and upon determining that an interference exists, modifying operation of the system.