Powder Weight Transducer for 8-16 Hz Vibration Attenuation

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Solution Overview

Problem

Handheld devices, including industrial and sports equipment, transmit vibrations that cause physiological damage due to frequencies between 5 and 2000 Hz, particularly affecting the hand, arm, and shoulder, with existing vibration damping solutions being ineffective for the 8-16 Hz frequency range.

Innovation Solution

A transducer that converts vibrational energy into fluidization energy using a canister with a powder that transitions from a settled to a fluidized state when excited by damaging vibrations, attenuating these frequencies by converting vibration energy into fluidization energy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional vibration damping materials are used in anti-vibration gloves or hand grips, then high frequency vibrations are effectively damped, but vibrations in the 8-16 Hz frequency range remain insufficiently damped

Engineering Contradiction:

Improvevibration damping effectivenessVSAvoidprotection against physiologically damaging frequencies

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention changes the physical state parameter of the damping material by using powder that transitions from a settled state to a fluidized state when exposed to vibration. This phase transition enables the material to effectively dampen the specific 8-16 Hz frequency range that conventional solid damping materials cannot address, while maintaining effectiveness across broader frequency ranges.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a composite approach by combining powder material with specific physical properties that enable both high-frequency damping and low-frequency (8-16 Hz) attenuation. The powder's ability to fluidize creates a composite damping mechanism that operates across multiple frequency ranges simultaneously, overcoming the limitations of single-material solutions.

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If rigid stabilization devices are attached to increase mass and moment of inertia, then device stability is improved, but vibration energy is transmitted directly to the user causing physiological damage

Engineering Contradiction:

Improvedevice stabilityVSAvoidvibration transmission to user

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The invention introduces powder as an intermediary substance between the vibrating device and the user's hand. This powder layer acts as a mediator that absorbs and dissipates vibration energy through fluidization, preventing direct transmission of harmful vibrations to the user while maintaining the stabilizing mass effect of the rigid device.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention converts the harmful vibration energy that would otherwise be transmitted to the user into beneficial fluidization of the powder. The vibration energy is transformed into kinetic energy of the powder particles, creating a damping effect that protects the user while the external rigid structure continues to provide stability.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Loss of energy

If anti-vibration gloves with damping material are used, then high frequency vibration damping is achieved, but the 8-16 Hz frequency range causing greatest physiological damage is not adequately protected

Engineering Contradiction:

Improvevibration energy dissipationVSAvoidphysiologically damaging vibrations

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

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 transducer effectively reduces physiological damage by absorbing vibrational energy, improving user comfort and device stability while maintaining accuracy and performance.

Implementation Method 1

a transducer that converts vibrational energy into fluidization energy using a canister with a powder that transitions from a settled to a fluidized state when excited by damaging vibrations

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

the powder, when excited by physiologically damaging vibration, has a fluidized state occupying the entire enclosure of said canister

Methodology Applied

Scientific EffectFluidization: Fluidisation

Data Source

PatentUS10890409B2Powder weight transducer

Publication Date: 2021.01.12 PIONEER ARCHERY DESIGNS LLC

AI summary

A transducer attenuates a physiologically damaging vibration by converting vibration energy to fluidization energy. The transducer includes a canister defining a sealed enclosure, a powder contained within the enclosure, and a coupler for vibrationally coupling the canister to the physiologically damaging vibration. When undisturbed, the powder has a settled state occupying less than the entire enclosure of the canister. However, when excited by physiologically damaging vibration, the powder has a fluidized state occupying the entire enclosure of the canister. When agitated by the physiologically damaging vibration via the coupler, the canister transmits vibration energy to the powder contained therein and causes the powder to fluidize, thereby attenuating the physiologically damaging vibration.