Teleoperation Vibration Filtering for Attachment Contact Detection
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Solution Overview
Problem
Existing remote operation systems for construction machines struggle to accurately determine whether vibrations detected by sensors are due to the attachment contacting a work target, as they transmit all vibrations to the operator, including those from the machine body, making it difficult for the operator to discern contact.
Innovation Solution
A remote operation device with a vibration detector that identifies multiple vibration components and selectively transmits only vibrations meeting a preset amplitude threshold, ensuring the operator receives vibrations likely caused by attachment contact with an object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all vibration signals from the sensor are transmitted to the remote operator without selection, then the operator receives complete vibration information, but the operator cannot distinguish between contact vibrations and machine body vibrations, reducing operational accuracy
Solution Approach 1:
The patent segments the vibration signal into multiple frequency components using Fourier transform, separating contact vibrations from machine body vibrations based on their distinct frequency characteristics. This allows selective transmission of only the relevant contact vibration components to the remote operator.
Solution Approach 2:
The patent extracts the specific frequency component corresponding to attachment contact from the mixed vibration signal. By identifying and extracting only the contact-related vibration frequency, the system transmits precise contact information while filtering out irrelevant machine body vibrations.
2Measurement precision
If vibration signals are filtered to transmit only contact vibrations, then operational accuracy improves, but the system complexity increases due to signal processing requirements
Solution Approach 1:
The patent uses feedback from the vibration sensor to continuously monitor and analyze vibration frequencies. The system compares detected frequencies against predetermined contact frequency ranges and adjusts signal transmission accordingly, creating a closed-loop system that automatically distinguishes contact vibrations from machine body vibrations.
Solution Approach 2:
The patent replaces complex mechanical vibration isolation systems with electronic signal processing. By using Fourier transform and frequency-based filtering, the system achieves vibration separation through computational methods rather than mechanical means, reducing overall system complexity.
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
This solution allows the operator to accurately determine attachment contact, enhancing operational precision by filtering out non-contact vibrations, thereby improving the accuracy of remote operation.
Implementation Method 1
a vibration detector configured to detect a plurality of vibration components in a plurality of directions different from each other, the vibration components being included in a vibration caused on the attachment
Data Source
AI summary
A remote operation device includes: a vibration detector to detect a plurality of vibration components in a plurality of directions different from each other, the vibration components being included in a vibration caused on an attachment; a transmission device; and a transmission control section that controls an operation of the transmission device. A vibration determination condition is set in advance, the vibration determination condition including a condition that an amplitude of a maximum vibration component largest in amplitude among the plurality of vibration components detected by the vibration detector is equal to or larger than a preset amplitude threshold. The transmission control section controls the operation of the transmission device to allow the vibration information to be transmitted to an operator only when the vibration determination condition is met.