Torque Sensor Amplifier Directional Gain Control
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Solution Overview
Problem
Conventional tightening torque measuring units experience errors in torque measurement when tightening in either clockwise or counterclockwise directions due to constant gain amplification, leading to inaccuracies as the torque value increases.
Innovation Solution
A tightening torque measuring unit with an amplifier that applies different gains based on the tightening direction, featuring a clockwise amplifier and a counterclockwise amplifier, ensuring accurate torque measurement by adjusting gains accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If constant gain amplification is applied to torque sensor output, then the measurement system is simple, but measurement precision deteriorates as torque value increases in either clockwise or counterclockwise direction
Solution Approach 1:
The amplifier is divided into multiple amplification units, each dedicated to a specific tightening direction (clockwise or counterclockwise). Each unit contains its own gain adjustment mechanism, allowing independent optimization of measurement precision for each direction without interfering with the other direction's performance.
Solution Approach 2:
Different gain values are applied locally to different tightening directions based on their specific characteristics. The system adjusts the amplification factor according to the actual torque sensor output characteristics in each direction, ensuring optimal measurement precision for both clockwise and counterclockwise operations.
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 reduces measurement errors to within ±0.3% in both directions, enabling high-precision torque measurement by aligning the output from the torque sensor with the actual torque value.
Implementation Method 1
a torque sensor 12 such as a strain gauge
Data Source
AI summary
A tightening torque measuring unit capable of reducing errors with respect to either a clockwise or counterclockwise direction as soon as possible is provided. A tightening torque measuring unit 10, installed in a tightening device, includes a torque sensor 12 that detects a tightening torque and an amplifier that amplifies an output from the torque sensor 12. The amplifier 40 or 42 applies a different gain to the output from the torque sensor depending on whether the tightening direction of the tightening apparatus is clockwise or counterclockwise.