Conveyor Sensor Array Layout for Feed Layer Height Control
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Solution Overview
Problem
Existing material processing systems face challenges in reliably determining the layer thickness of feed material without disrupting operation, particularly in mobile setups where additional structures are undesirable.
Innovation Solution
A sensor array with sensors having detection volumes aligned at least partially in or opposite to the conveying direction, allowing flexible positioning and minimizing disruption, is used to determine layer height and velocity of the feed material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are positioned above the conveying system to measure layer height, then measurement capability is improved, but access to the conveying system and overall system height are impaired
Solution Approach 1:
The patent transitions the sensor arrangement from a vertical positioning (above the conveying system) to a lateral positioning (at the side of the conveying system). This dimensional change allows the sensors to measure layer height without obstructing access to the conveying system from above, resolving the contradiction between measurement capability and operational access.
2Measurement precision
If structures are added above the conveying system for measurement, then measurement capability is improved, but overall system height increases
Solution Approach 1:
The patent relocates the sensor system from a vertical arrangement (requiring additional height) to a lateral arrangement (using horizontal space). This dimensional shift enables layer height measurement without increasing the overall system height, making the solution suitable for mobile material processing equipment with space constraints.
3Productivity
If feed rate is increased to improve productivity, then output is improved, but crusher fill level becomes excessively high causing mechanical stress and wear
Solution Approach 1:
The patent implements a feedback control system where sensors continuously monitor the layer height of feed material on the conveying device. This real-time information is fed back to the control unit, which adjusts the feed rate to maintain optimal crusher fill level. This prevents excessive mechanical stress and wear while maximizing productivity within safe operating parameters.
4Strength
If feed rate is decreased to reduce mechanical stress, then mechanical stress is reduced, but productivity and machine utilization decrease
Solution Approach 1:
The feedback control system dynamically adjusts the feed rate based on real-time layer height measurements. Instead of using a fixed conservative feed rate, the system optimizes the feed rate continuously to maintain optimal crusher fill level. This maximizes machine utilization and productivity while preventing excessive mechanical stress, resolving the contradiction between strength and productivity.
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
Enables reliable and efficient control of material flow, preventing overload and underload situations, enhancing machine utilization, fuel efficiency, and product quality by accurately measuring layer height and velocity.
Implementation Method 1
the sensors each detect as a signal waves that are reflected at least partially along a detection volume of the respective sensor by the feed material
Data Source
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AI summary
The invention relates to a method for determining the layer height of a feed material that is conveyed to a crushing and/or screening plant of a material processing facility, wherein the feed material is conveyed by means of a conveying device in a conveying direction, and wherein the layer height of the feed material is determined by means of a sensor array consisting of a plurality of sensors. A reliable method that can be carried out with minimal effort and without impairing the operation of the material processing facility is achieved by ensuring that the longitudinal axes of the detection volumes of the sensors run at least partially in and/or opposite to the conveying direction.