Work Tool Ground Sensing for Precise Surface Contact Detection
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Solution Overview
Problem
Utility vehicle operators face challenges in determining if the work tool is in contact with the surface during operations, especially during precision maneuvers like grading, due to limited visibility.
Innovation Solution
A utility vehicle equipped with a ground sensing apparatus and an electronic processor that receives image data from the apparatus to determine if the work tool is in contact with the surface, and generates as-built data for the surface after the work tool has passed over it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the operator relies on direct visual observation of the work tool contact with the surface, then the system remains simple without additional sensors or processors, but the operator cannot accurately determine if the work tool is in contact with the surface during precision maneuvers
Solution Approach 1:
The patent replaces direct visual observation (mechanical/optical system) with an electronic imaging system comprising a sensor array and processor. The ground sensing apparatus captures images of the work tool's contact with the surface, and the processor analyzes these images to determine contact status, substituting human visual judgment with automated electronic detection.
Solution Approach 2:
The patent introduces an intermediary imaging system between the work tool contact event and the operator's knowledge of that contact. The ground sensing apparatus and processor act as intermediaries that capture, process, and interpret the contact information, providing indirect but accurate measurement of the contact status.
2Loss of information
If the operator positions themselves closer to the work tool for better visibility, then contact detection may improve, but the operator's safety and comfort are compromised due to proximity to moving parts
Solution Approach 1:
The ground sensing apparatus serves as an intermediary that collects contact status information without requiring the operator to be physically close to the work tool. The sensor array and processor remotely capture and analyze contact events, providing the operator with information while maintaining a safe distance.
Solution Approach 2:
The patent creates a visual copy (image) of the work tool contact event through the ground sensing apparatus. Instead of directly observing the contact, the operator receives processed image data that replicates the contact information, allowing remote monitoring of the contact status.
3Loss of time
If manual observation methods are used to determine work tool contact status, then the system remains simple, but time is lost during precision maneuvers due to difficulty in determining contact
Solution Approach 1:
The patent replaces manual visual observation with automated electronic image capture and processing. The ground sensing apparatus continuously captures images and the processor automatically analyzes them to determine contact status, eliminating the time delay associated with manual observation during precision maneuvers.
Solution Approach 2:
The imaging system operates continuously to capture work tool contact events, ensuring that contact status information is available in real-time without interruption. This continuous operation eliminates gaps in detection that would occur with intermittent manual observation, reducing time loss during precision maneuvers.
Data Source
AI summary
In accordance with an example embodiment, a utility vehicle comprising a main frame; a work tool configured to move relative to the main frame to move a material on a surface; a ground sensing apparatus proximate the work tool, wherein the ground sensing apparatus is configured to detect contact between the work tool and the surface; a non-transitory computer-readable memory storing operation information; and an electronic processor configured to: receive image data captured by the ground sensing apparatus as the work tool passes over the surface, and determine if the work tool is in contact with the surface based on the image data.