Laboratory Mill Active Vibration Cancellation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laboratory mills operating on the impact and/or cutting principle generate significant sound emissions due to vibrations and comminution processes, which are difficult to mitigate using existing sound-insulation methods, especially when milling stock is being fed or removed through an open milling stock tube.
Innovation Solution
The implementation of a counter-vibration apparatus with a control unit and vibration-generation unit that generates counter-vibrations to actively reduce the amplitude of disruptive vibrations and sound emissions by creating destructive interference, and an anti-sound system to further reduce sound emissions through counter-sound waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sound-absorbing materials are used to reduce sound emissions, then sound radiation is reduced, but the device complexity and cost increase
Solution Approach 1:
The patent replaces passive mechanical sound insulation materials with an active electronic system consisting of sensors, control units, and speakers that generate anti-phase sound waves to cancel vibrations and sound emissions dynamically during milling operations
Solution Approach 2:
The system dynamically adjusts sound wave parameters (frequency, amplitude, phase) based on real-time detection of vibration and sound characteristics during milling, allowing adaptive cancellation without requiring fixed structural modifications
2Object-affected harmful factors
If the milling stock tube is closed to reduce sound emissions, then sound radiation through the tube is reduced, but the ease of operation deteriorates due to repeated opening and closing
Solution Approach 1:
The patent replaces the mechanical approach of opening/closing the milling stock tube with an electronic anti-sound system that generates counter-vibrations and anti-phase sound waves, allowing the tube to remain open for continuous material feeding while eliminating sound emissions
3Object-affected harmful factors
If the laboratory mill is completely encased for sound insulation, then sound emissions are reduced, but the device complexity and space requirements increase
Solution Approach 1:
The patent extracts the sound cancellation function from the structural housing and implements it as a separate electronic system with sensors and speakers positioned strategically around the milling chamber, eliminating the need for bulky sound-insulating enclosures
Solution Approach 2:
The system uses thin speaker membranes and sensor elements that can be integrated into existing mill components without requiring thick sound-insulating walls or large enclosing structures
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 significantly reduces sound radiation from laboratory mills during operation, particularly through the milling stock tube, while allowing for uninterrupted feeding and removal of milling stock, enhancing operational efficiency and user experience.
Implementation Method 1
vibrations of the device and/or housing part that generate disruptive sound are eliminated at least in part by means of destructive interference
Implementation Method 2
at least one sound-generation unit (17) for generating counter-sound waves for active sound reduction
Data Source
AI summary
The invention relates to a laboratory mill comprising at least one counter-vibration device (27) which has at least one control unit (29a) for providing a counter-vibration signal (29b) and at least one controllable vibration generation unit (29) for converting the counter-vibration signal (29b) into counter-vibrations (30), wherein the vibration-generation unit (29) counteracts a device- and/or housing part (31) of the laboratory mill (1) and the counter-vibrations (30) lead to an active reduction in the vibrations of the device- and/or housing part (31) and/or an at least partial suppression of noise-inducing vibrations of the device- and/or housing part (31), by means of destructive interference.