Boundary Wire Signal Gain Control for Accurate Robot Positioning
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Solution Overview
Problem
Automatic moving devices face interference from electromagnetic fields generated by motors, adjacent working regions, and external electromagnetic waves, leading to misjudgment of their position within working regions, which affects their control and operation.
Innovation Solution
The system employs a control method that includes detecting electromagnetic fields, amplifying detection signals, determining feature points, and adjusting amplification factors based on threshold values to eliminate or reduce interference, ensuring accurate positioning and operation within defined working regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If electromagnetic field detection is used to determine position in working region, then position detection capability is improved, but detection precision deteriorates due to interference from motors, adjacent regions, and external electromagnetic waves
Solution Approach 1:
The patent implements feedback by continuously monitoring the detection signal characteristics and dynamically adjusting the amplification factor based on the detected signal strength and interference levels. The processor analyzes the detection signal from the periodic current signal in the boundary wire and adjusts the amplification factor in real-time to maintain optimal detection precision despite varying interference conditions.
Solution Approach 2:
The patent changes the parameter of amplification factor dynamically based on detection conditions. When interference is detected or signal strength varies, the amplification factor is adjusted to optimize the detection signal. This parameter change allows the system to adapt to different electromagnetic environments and maintain reliable position detection.
2Measurement precision
If amplification factor is increased to enhance detection signal, then detection sensitivity is improved, but interference signal amplification worsens
Solution Approach 1:
The patent applies dynamics by making the amplification factor variable rather than fixed. The amplification factor changes dynamically based on the detected signal characteristics and interference levels. This dynamic adjustment allows the system to amplify weak detection signals while avoiding excessive amplification of interference signals, resolving the contradiction between sensitivity and interference amplification.
Solution Approach 2:
The system uses feedback to monitor the detection signal quality and adjust the amplification factor accordingly. When interference is detected or signal-to-noise ratio deteriorates, the feedback mechanism reduces the amplification factor to prevent further interference amplification, thus maintaining optimal detection sensitivity without exacerbating interference.
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 effectively filters out noise and interference, enhancing the anti-interference capacity of the automatic working system, allowing for precise control and efficient operation within designated working areas.
Implementation Method 1
a current signal generating an electromagnetic field when flowing through a boundary wire
Implementation Method 2
a signal detecting device which generates a detection signal by sensing the changed electromagnetic field
Data Source
AI summary
A control method of an automatic working system, which comprises the following steps: a signal generating device generates a boundary signal; the boundary signal flows through the boundary wire to generate an electromagnetic field; a detecting device on an automatic moving device detects the electromagnetic field to generate a detection signal, amplify the detection signal to form a gain signal, compare an feature point of the gain signal with a preset condition, the preset condition comprising: the feature point is lower than an upper threshold value and higher than a lower threshold value, then automatically adjust the gain signal according to a comparing result, such that the feather point of the gain signal formed after adjusting accords with the preset condition, further to process the gain signal, An automatic working system and an automatic moving device also be disclosed.