Cabin Audio Feedback for Fine Hydraulic Blade Control
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Solution Overview
Problem
Modern motor graders with electromechanical controls and improved sound isolation make it difficult for operators to perceive hydraulic valve sounds and vibrations, leading to challenges in fine control of the blade, reduced situational awareness, and potential unintentional control inputs due to the lack of tactile and auditory feedback.
Innovation Solution
Implementing a controller within the motor grader that receives operational parameters from external components using input devices, executes a sound-generation algorithm to convert these parameters into audio, and outputs the audio to the operator via speakers, providing synthetic audio feedback to enhance control precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If improved sound isolation is introduced in the cabin, then operator comfort is improved, but auditory feedback from hydraulic valves is lost
Solution Approach 1:
The patent introduces an intermediary system consisting of microphones positioned near hydraulic valves and speakers in the cabin that transmit auditory feedback. This mediator allows the operator to hear valve sounds without compromising the sound isolation of the cabin structure itself.
Solution Approach 2:
The system creates a copy of the auditory feedback from hydraulic valves by using microphones to capture the sounds and reproducing them through speakers in the cabin, allowing the operator to perceive valve operation sounds without removing the sound isolation barriers.
2Ease of operation
If electromechanical controls are introduced, then ease of operation is improved, but tactile feedback is lost
Solution Approach 1:
The patent implements an audio feedback system that provides real-time auditory information about hydraulic valve operation and cylinder movement. This feedback loop allows operators to perceive system state and make precise control adjustments, compensating for the lack of tactile feedback from electromechanical controls.
3Measurement precision
If visual feedback is used for blade control, then control precision is maintained, but situational awareness is reduced
Solution Approach 1:
The patent adds an auditory dimension to the control feedback system, allowing operators to monitor blade position and hydraulic system state through sound rather than relying solely on visual information. This multi-sensory approach maintains control precision while freeing visual attention for broader situational awareness.
Data Source
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AI summary
With the introduction of electromechanical input devices (132) and sound-proofed cabins (130), it has become difficult for operators in a cabin (130) to receive audio feedback from a work implement (120) of a work machine (100). This hinders fine control of the work implement (120). Accordingly, disclosed embodiments synthetically re-introduce audio feedback into the cabin (130). In particular, a controller (115) monitors operational parameters associated with movement of the work implement (120), executes a sound-generation algorithm to convert those operational parameters into audio (e.g., with different audio layers associated with different components of the work implement (120)), and outputs the audio to the operator (e.g., via at least one speaker (134)) in the cabin (130).