Monolithic Sensor Mount Assembly for Timber-Device Vibration Control
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Solution Overview
Problem
Existing sensor mounts for timber-working devices experience resonance and vibration issues within the 500 Hz to 1100 Hz frequency range, leading to reduced service life due to distortion and amplification of vibrations, particularly in the range of 600 Hz to 1000 Hz, which affects the accuracy and durability of contactless sensors like the Keyence LR-TB2000C laser sensor.
Innovation Solution
A monolithic sensor mount structure is designed with a base portion and sensor mounting portion configured to avoid resonance, manufactured from a single piece of material such as aluminum alloy, with a thickness of at least 10 mm, featuring flanges for secure attachment to the timber-working device frame and a cavity for the sensor, which reduces the likelihood of vibration-induced resonance by orienting the sensor's vulnerable axis perpendicular to the highest forces and using a transparent viewing pane to minimize vibration transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor mount is used in timber-working devices, then the sensor can detect stem ends automatically, but the mount experiences resonance and vibration in the 500 Hz to 1100 Hz range reducing service life
Solution Approach 1:
The patent changes the physical parameters of the sensor mount by using a monolithic structure with increased thickness (at least 10 mm) and specific geometry designed to shift the resonance frequency outside the harmful 500 Hz to 1100 Hz range. This parameter modification directly addresses the vibration issue while maintaining sensor functionality.
Solution Approach 2:
The patent specifies using aluminum alloy material for the monolithic sensor mount structure. This material selection provides optimal balance between vibration damping properties, structural strength, and weight, effectively reducing resonance while supporting the sensor assembly.
2Ease of manufacture
If thin plate materials and welded joins are used in sensor mounts, then manufacturing is easier, but vibration distortion and resonance are amplified
Solution Approach 1:
The patent merges multiple components into a single monolithic structure manufactured from one piece of aluminum alloy material. This eliminates welded joints and thin plate connections that amplify vibration, while the integrated structure provides inherent vibration resistance. The monolithic design maintains ease of manufacture through single-piece fabrication processes.
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
The monolithic sensor mount effectively reduces resonance and vibration-induced damage, enhancing the service life and accuracy of contactless sensors by aligning the sensor's vulnerable axis with the lowest force direction and using a thick, non-resonant structure to dampen vibrations, thereby improving the reliability of timber-working operations.
Implementation Method 1
The monolithic structure may include a base portion configured to be secured to a frame of a timber-working device. The base portion and the sensor mounting portion may be configured to avoid resonance with vibration induced by operation of the timber-working device.
Implementation Method 2
The base portion and the sensor mounting portion may be configured to have a resonance frequency outside the range of about 500 Hz to about 1100 Hz.
Data Source
AI summary
A sensor mount for use with a timber-working device includes a monolithic structure having a base portion configured to be secured to a frame of a timber-working device, and a sensor mounting portion including a cavity configured to receive a contactless sensor. The cavity has a sensor mounting surface for securing the contactless sensor thereto.