Log Modulus Detection via Rotating Transfer Station
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for determining the modulus of elasticity of logs in sawmills are hindered by large and complex detection stations, leading to significant downtime and reduced productivity due to the need for substantial lifting equipment and log transfer between detection stations.
Innovation Solution
An apparatus and method that integrates the detection of natural frequencies and density measurement at a transfer station between conveyor lines, using a device with rotating supports to simultaneously transfer and measure logs, reducing system complexity and dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate detection station with lifting equipment is used to measure natural frequencies, then the modulus of elasticity can be identified, but the system dimensions and complexity increase significantly
Solution Approach 1:
The patent combines the natural frequency detection function with the existing log transfer station between conveyor lines. The detection device is integrated into the transfer station structure, eliminating the need for a separate detection station with independent lifting equipment. This merging reduces overall system complexity while maintaining the capability to identify modulus of elasticity through natural frequency measurement.
2Measurement precision
If logs are transferred to a separate detection station for measurement, then natural frequencies can be detected, but system productivity decreases due to significant downtime
Solution Approach 1:
The patent enables continuous operation by integrating detection into the log transfer process. Logs are detected during their regular transfer between conveyor lines without requiring removal from the production flow. The detection occurs continuously as logs pass through the transfer station, eliminating idle time and maintaining continuous productive action throughout the system.
3Measurement precision
If logs are picked up and transferred to a detection station, then measurement can be performed, but the detection station requires significant dimensions to house lifting equipment
Solution Approach 1:
The transfer station serves multiple functions: it transfers logs between conveyor lines and simultaneously performs natural frequency detection for modulus of elasticity identification. By making the transfer station universal and multi-functional, the patent eliminates the need for a dedicated separate detection station, thereby reducing the overall space requirements and avoiding the need for additional lifting equipment infrastructure.
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 allows for simultaneous log transfer and detection, minimizing downtime and increasing productivity while simplifying the system design, thereby enhancing overall efficiency in log processing systems.
Implementation Method 1
The station for detecting the natural frequencies of the log comprises a device which generates an impact on one of the two faces of the log, normally using a suitably sized hammer, then detects an acoustic emission caused by the impact
Implementation Method 2
or alternatively optically detects a consequent log vibration
Data Source
AI summary
An apparatus for identifying the modulus of elasticity of logs includes a device (2) equipped for detecting at least one log (T) eigenfrequency (natural frequency) and with a plurality of supports (10) able to move by rotating between a pick up position, in which they are located at a loading station (7), and a release position in which they are located at an unloading station (8) which is on the opposite side of a supports (10) axis of rotation relative to the loading station (7). A method for identifying the modulus of elasticity of logs includes the steps of picking up a log (T) while it is fed along a first direction (A1) on a first conveyor line (102); subjecting the log (T) to a step of detecting at least one natural frequency; and a step of releasing the log (T) on a second conveyor line (103) defining a second feed direction (A2) which is transversal to the first conveying direction (A1).