Autonomous Vehicle Area Signal Selection via Pulse Recurrence
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Solution Overview
Problem
Unmanned autonomous operating vehicles face challenges in accurately recognizing contiguous operating areas due to weakened signal intensity and opposing magnetic field directions, leading to reduced recognition accuracy.
Innovation Solution
A selection mechanism is implemented at the charge station to allow users to select from multiple pulse currents with varying pulse recurrence times, enabling accurate area recognition and easy signal selection, even in contiguous operating areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single kind of electric pulse current is used for operating areas with limited reception time, then the recognition accuracy is enhanced within a predetermined time window, but the area recognition accuracy is not always satisfactory when multiple contiguous operating areas are present
Solution Approach 1:
The patent segments the single pulse current signal into multiple distinct pulse currents with different pulse recurrence times. Each pulse current is assigned to a specific operating area, allowing the system to distinguish between contiguous areas by identifying which pulse recurrence time pattern is detected. This segmentation resolves the contradiction by providing unique signal characteristics for each area while maintaining the time-window-based reception limitation.
Solution Approach 2:
The patent changes the temporal parameter (pulse recurrence time) of the electric pulse current to differentiate between operating areas. By varying the pulse recurrence time for each area while keeping other parameters constant, the system achieves reliable recognition in contiguous areas without requiring complex signal processing or additional hardware.
2Measurement precision
If pulse current reception time is equal to each other in adjacent vehicle sensors, then the signal intensity is weakened due to cancellation, but using different reception times increases device complexity
Solution Approach 1:
The patent employs periodic pulse currents with different recurrence times for each operating area. The magnetic sensor detects these periodic signals and identifies the operating area based on the detected pulse recurrence time. This periodic action approach simplifies the system compared to using asexual signals with different characteristics, as it maintains signal regularity while enabling area differentiation.
3Measurement precision
If multiple pulse currents with varying pulse recurrence times are provided, then area recognition accuracy is enhanced in contiguous areas, but the selection mechanism increases device complexity
Solution Approach 1:
The patent implements a selection mechanism that allows the system to automatically select the appropriate pulse current based on the operating conditions. The ECU monitors the magnetic field signals and autonomously determines which pulse recurrence time pattern is present, selecting the corresponding pulse current without requiring manual intervention or complex external control systems. This self-service approach minimizes the increase in device complexity while maintaining high recognition accuracy.
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 solution enhances area recognition accuracy and reliability by allowing users to choose the appropriate pulse current, ensuring precise identification of operating areas and preventing signal interference.
Implementation Method 1
detect a magnetic field, more precisely a direction of the magnetic field generated in the area wire 72 by the pulse current (i.e., area signal) supplied through the current supplier of the charge station 74 with the use of a magnetic sensor installed on the vehicle
Data Source
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AI summary
An unmanned autonomous operating system comprises a station provided with a signal generator for supplying an electric pulse current area signal to an area wire that defines an operating area, and an unmanned autonomous vehicle having magnetic sensors for detecting a magnetic field generated by the area wire and a microcomputer programmed to recognize the operating area from the detected magnetic field, whereby a selection mechanism is installed at the station so as to output one of several possible area signals from the signal generator in response to a selection by a user, and whereby the area signal generated from the signal generator is registered by the vehicle as the registered area signal, and the operating area is further recognized based on that signal.