Working Vehicle Attachment Identification Using Signal Strength and Time
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Solution Overview
Problem
Existing systems for determining the attachment on a working vehicle do not accurately consider the point in time at which an acceleration signal is received, leading to potential errors in attachment identification.
Innovation Solution
A working vehicle system that includes a hitch, a receiver for near field communication signals, and a controller that calculates judgment values based on signal strength and elapsed time to accurately identify the attached attachment, using a memory to store identification information and associate it with signal strengths and times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only received signal strength is used to identify attachment, then identification process is simple, but identification accuracy deteriorates due to not considering signal reception timing
Solution Approach 1:
The system pre-stores identification information and signal strength data in memory before final identification occurs. By maintaining a history of received signals and their corresponding timestamps, the system prepares necessary data in advance to enable accurate identification that considers temporal factors, resolving the contradiction between simplicity and accuracy.
Solution Approach 2:
The invention adds a temporal dimension to the identification process by incorporating elapsed time since signal reception as a critical factor. Instead of relying solely on signal strength (one-dimensional), the system evaluates both signal strength and time parameters (two-dimensional), thereby improving identification accuracy without excessive complexity increase.
2Measurement precision
If multiple parameters including elapsed time are considered for attachment identification, then identification accuracy is improved, but calculation complexity increases
Solution Approach 1:
The system continuously monitors signal strength and elapsed time, feeding this data back into the identification process. By establishing a feedback mechanism that regularly updates identification information in memory based on current signal conditions and timing, the system achieves high accuracy through iterative refinement rather than complex one-time calculations.
Solution Approach 2:
The invention dynamically adjusts the weight or significance of different parameters (signal strength, elapsed time) based on current operational conditions. By allowing parameter importance to change rather than using fixed complex algorithms, the system achieves accurate identification while keeping the calculation process adaptable and manageable.
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
Enables precise attachment identification by considering both signal strength and time elapsed since signal reception, improving accuracy and reliability in attachment detection.
Implementation Method 1
a receiver to receive one or more wireless signals which are transmitted periodically from one or more transmitters in or on one or more of the attachments, and which include respective one or more pieces of identification information of the one or more attachments, and which are compliant with a near field communication standard
Data Source
AI summary
A working vehicle includes a hitch, a receiver to receive wireless signal(s) from transmitter(s) in/on attachment(s) and including piece(s) of identification information of the attachment(s), and a controller configured or programmed to select identification information of the attached attachment based on the piece(s) of identification information included in the received signal(s) and received signal strength(s) of the signal(s); perform a process based on the selected information; cause a memory to store, for a period, the piece(s) of identification information included in the signal(s); calculate time(s) from when the signal(s) are received or time(s) from when the piece(s) of identification information are stored; calculate judgment value(s) based on the strength(s) at time point(s) at which the piece(s) of identification information are received and the calculated time(s); and select, based on the value(s), the identification information of the attached attachment from those stored in the memory.