Conveyor Layer Height Control via Sensor Feedback
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Solution Overview
Problem
Conventional conveyor systems in sorting centers face challenges in maintaining a stable product flow, leading to overloads or underloads, which can cause production disruptions, equipment jams, and musculoskeletal disorders due to the inability to promptly adjust to variations in product height and flow.
Innovation Solution
A method involving a first and second conveyor with sensors to measure product flow and height, allowing for real-time control of conveyor speeds to maintain a quasi-constant product layer height, using dynamic and static filtering to refine flow setpoints and prevent overloads and underloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical limiters are used to limit the height of product flow on a conveyor, then the height of product layer is controlled, but jams are generated and the system lacks flexibility
Solution Approach 1:
The patent replaces mechanical limiters with an optical measurement system (sensor) and electronic control system. The sensor measures product layer height and sends signals to a controller, which adjusts conveyor speed electronically. This substitution eliminates mechanical contact that causes jams while maintaining precise height control through non-contact measurement and electronic regulation.
Solution Approach 2:
The system enables the conveyor to self-regulate product layer height through feedback control. The sensor continuously monitors the product layer height, and the controller automatically adjusts the conveyor speed based on measured values, allowing the system to maintain optimal height without external mechanical intervention or manual adjustment.
2Ease of operation
If conveyor speed is controlled based on delayed measurement from downstream conveyor, then speed regulation is achieved, but rapid variations in product flow are not compensated and control oscillations occur
Solution Approach 1:
The patent implements preliminary action by measuring product layer height upstream on the first conveyor before products reach the second conveyor. This upstream measurement allows the control system to anticipate and compensate for flow variations before they propagate downstream, preventing oscillations and ensuring stable flow regulation by acting in advance rather than reacting to delayed downstream conditions.
Data Source
AI summary
The invention relates to a method for adjusting the thickness (H2) of a layer of solid products on a conveyor (20), comprising the steps of: conveying products on a first linear conveyor (10) at a first speed (V1), emptying the products from the first conveyor (10) onto the second linear conveyor (20), and conveying the products on the second conveyor (20) at a second speed (V2). Said method is substantially characterized in that it further includes steps of: determining a nearly constant set product flow rate Ø2,cons and a second nearly constant speed (V2) on the second conveyor (20), measuring the flow of products on the first conveyor (10) by means of a first sensor (11), and controlling the first speed (V1) by at least the value of the flow measured by the first sensor (11) and at set product flow rate value Phi2.