Networked Motorized Drive Roller Conveyor Gap Control
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Solution Overview
Problem
Conventional conveyor control systems require extensive wiring and specialized knowledge, leading to increased implementation time, cost, and response time issues due to central PLCs, and lack the ability to control item gaps, resulting in reduced accumulation efficiency.
Innovation Solution
A networked motorized drive roller conveyor system with distributed controls and sensors that measure and control gaps between items, eliminating the need for central PLCs and allowing localized programming and diagnostics, using motorized drive roller assemblies and sensors to manage conveyor operations and item spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a central PLC control system is used, then centralized control capability is achieved, but extensive wiring and increased response time are required
Solution Approach 1:
The patent divides the centralized control system into distributed intelligent modules, each capable of autonomous decision-making. Control functions are segmented and assigned to individual conveyor zones or devices, eliminating the need for a single central processor to handle all operations, thereby reducing response time while maintaining coordinated control.
Solution Approach 2:
The patent transitions from a single-dimension centralized control architecture to a multi-dimensional distributed network architecture. Control intelligence is distributed across multiple spatial dimensions (different zones, devices, and layers), enabling parallel processing and faster local responses while maintaining system-wide coordination through network communication.
2Ease of operation
If a central PLC control system is used, then centralized control capability is achieved, but significant wiring and installation cost are required
Solution Approach 1:
The patent extracts control intelligence from the central PLC and embeds it directly into field devices and zones. Each intelligent module contains its own processor and control logic, eliminating the need for extensive wiring to connect every device to a central controller. Only essential communication and power connections are required.
Solution Approach 2:
The patent employs universal intelligent modules that can perform multiple control functions (motion control, sensor processing, device coordination) regardless of their location in the system. This multi-functionality reduces the variety and quantity of specialized components needed, simplifying the overall system architecture and reducing wiring requirements.
3Extent of automation
If conventional PLC control is used, then basic control functions are achieved, but specialized knowledge and programming complexity are required
Solution Approach 1:
The patent implements self-service intelligent modules that automatically configure and adapt to their operational environment. The modules perform self-diagnosis, self-parameterization, and automatic coordination with neighboring modules, eliminating the need for complex manual programming and specialized knowledge for system setup and modification.
Solution Approach 2:
The patent incorporates continuous feedback mechanisms where intelligent modules monitor their own operational status and automatically adjust their control parameters based on real-time conditions. This feedback-driven autonomous operation reduces the need for manual programming and specialized knowledge, as the system adapts automatically to changing requirements.
4Use of energy by moving object
If MDR conveyor system is used, then lower power consumption and noise reduction are achieved, but inability to control item gaps results in reduced accumulation efficiency
Solution Approach 1:
The patent implements dynamic gap control where the spacing between items is continuously adjusted based on real-time conditions. The system dynamically modifies conveyor zone speeds and item release timing to optimize accumulation density while maintaining the energy-efficient MDR operation, thereby improving productivity without sacrificing power savings.
Solution Approach 2:
The patent changes operational parameters (zone speeds, item release intervals, acceleration profiles) of the MDR system to optimize item gap control. By dynamically adjusting these parameters based on accumulation requirements, the system achieves both energy efficiency and high accumulation efficiency simultaneously.
Data Source
AI summary
A motorized drive roller conveyor includes an upstream zone and a downstream zone, with each zone having a drive roller, an idler roller that is driven by the drive roller, and a sensor. The upstream zone and the downstream zone are controlled by a card, which measures a gap between a first item on the conveyor and a second item on the conveyor by beginning a counter when a trailing edge of the first item passes the sensor of the upstream zone and stopping the counter when a leading edge of the second item passes the sensor of the upstream zone to generate a counter value. If the first item is stopped in the downstream zone, the card of the upstream zone causes the drive roller of the upstream zone to advance the second item into the downstream zone for a distance derived from the counter value before stopping the transportation of the second item.