Haptic Feedback Riding Mower for Noise-Resistant Driver Alerts
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Solution Overview
Problem
Open-cabin riding mowers face challenges in effectively communicating alarms and messages to drivers due to noise interference and vibrations from the power source and mowing operations, which can mask auditory and visual alerts, and existing haptic feedback systems struggle to transmit vibrations effectively and differentiate between various alarm types.
Innovation Solution
An open-cabin riding mower equipped with a haptic feedback device integrated into the driver's seat, footrest, or maneuvering tool, which provides physical stimuli like vibration, and a condition evaluation unit that controls the operational pattern of the haptic feedback based on evaluated conditions, allowing for differentiated and effective communication of alerts through varying intensity, frequency, duration, and repetition of the stimulus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If auditory or visual alarm systems are used in open-cabin mowers, then information can be communicated to the driver, but the noise from the engine and grass mowing masks the alarm sounds and messages
Solution Approach 1:
The patent replaces auditory and visual alarm systems with a haptic feedback system that uses vibration motors to provide tactile alerts to the driver. The vibration motor generates mechanical vibrations that are transmitted through the mower's structure to the driver's body, substituting the acoustic and optical fields with a mechanical vibration field that is not masked by engine noise.
Solution Approach 2:
The patent introduces the mower's structural components (seat, handle, footrest) as intermediaries to transmit the vibration from the motor to the driver's body. These structural members serve as mediators that conduct the haptic feedback signal directly to the driver, bypassing the noisy environment.
2Ease of operation
If vibration-based haptic feedback is transmitted through vehicle constituent members, then physical stimulus can be provided to the driver, but the vibration is not effectively transmitted unless enhanced
Solution Approach 1:
The patent employs vibration motors that generate enhanced vibrational forces to overcome the damping effect of the mower's structure. By increasing the amplitude and frequency parameters of the vibration, the system ensures that the haptic feedback signal remains detectable by the driver despite being transmitted through multiple structural members.
3Device complexity
If a single vibration frequency is used for haptic feedback, then the system is simple, but external vibrations from the mower mask the alarm vibration when frequencies are similar
Solution Approach 1:
The patent implements a dynamic frequency selection mechanism where the control unit selects different vibration frequencies based on the detected operating state of the mower. When external vibrations are detected, the system adjusts the vibration frequency to avoid resonance and masking effects, ensuring reliable alarm transmission across various operating conditions.
4Ease of operation
If the driver is directly exposed to engine and mowing noise, then the open-cabin design provides better visibility and access, but the driver cannot hear alarm sounds or voice messages
Solution Approach 1:
The patent replaces the auditory communication channel with a mechanical vibration channel that bypasses the noisy environment. The haptic feedback system uses the mower's structure as a transmission medium to deliver tactile alerts directly to the driver's body, maintaining the open-cabin design's advantages while solving the noise interference problem.
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 haptic feedback system ensures that critical information is conveyed to the driver even in noisy conditions, with distinct alerts for different emergency levels, enhancing the driver's ability to respond promptly to various mower conditions, such as obstacles, fuel issues, or external communications.
Implementation Method 1
a haptic feedback device incorporated in at least one of the driver's seat, the footrest and the maneuvering operational tool and configured to provide a physical stimulus to the driver
Data Source
AI summary
An open-cabin riding mower includes a haptic feedback device incorporated in at least one of a driver's seat, a footrest and a maneuvering operational tool which are contact with the driver's body in the course of traveling and configured to provide a physical stimulus to the driver, a condition evaluation unit for evaluating a condition related to traveling of the mower and a device control section for controlling an operational pattern of the haptic feedback device based on result of the evaluation by the condition evaluation unit.