Traction Force Control Method for Sensor Zero Point Stabilization
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Solution Overview
Problem
Conventional traction apparatuses face challenges in accurately controlling traction force due to fluctuations in the zero point of traction force sensors caused by transitional states, electrical power activation, and environmental changes, leading to inaccurate detection and control of traction forces.
Innovation Solution
A traction force control method that involves measuring the zero traction state, adjusting the output of the control circuit to set a reference value for the drive signal, and correcting the zero point of the traction force sensor, allowing for precise control of the traction force by adjusting the drive signal to maintain accuracy even with sensor fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traction force sensor is used to detect and control traction force, then traction force control is enabled, but the zero point of the sensor fluctuates due to transitional states, electrical power activation, and environmental changes, leading to inaccurate detection
Solution Approach 1:
The patent applies preliminary action by performing zero point adjustment before normal traction force measurement and control operations. The control circuit measures the output of the traction force sensor when no traction force is applied, determines the zero point, and stores it for subsequent corrections, ensuring accurate measurements from the start of operation
Solution Approach 2:
The patent implements feedback by continuously monitoring the traction force sensor output and comparing it against the stored zero point value. The control circuit automatically corrects measurements by subtracting the zero point offset, creating a closed-loop system that maintains measurement accuracy despite environmental changes or sensor drift over time
Data Source
AI summary
A traction force control method for a traction apparatus according to the present invention that impresses a desired traction force on an object to be hauled via a traction mechanism is provided. The method includes measuring, in a zero traction state in which an impressed traction force that is impressed on the object to be hauled is zero, the impressed traction force with a traction force sensor and outputting a zero traction value. The method also includes generating an added value in which an adjusting output from a control circuit is added to the zero traction force value; providing the added value to a drive circuit of a drive mechanism that drives the traction mechanism and outputting a drive signal that corresponds to the added value; performing adjustment by increasing or decreasing the adjusting output so that the drive signal becomes a reference value that puts the object to be hauled in the zero traction state, setting the zero traction value as a zero point of the zero traction force sensor, and the adjusting output obtained by the adjustment step as a zero point of the control output of the control circuit, respectively.