Work Machine Display Control for Delay Compensation
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Solution Overview
Problem
The existing display control systems for work machines cannot effectively prevent a decrease in operability caused by image transmission delays, as they do not adequately account for the movement and orientation changes of the work machine during the delay time.
Innovation Solution
A display control device that includes an image receiving unit and a display control unit, which processes images based on the movement amount of the work machine during the receipt delay time, generating a display signal that compensates for the delays by shifting and rescaling the image to match the machine's current position and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If image transmission is performed from work machine to monitoring station, then remote operation capability is enabled, but image transmission delay occurs causing decrease in operability
Solution Approach 1:
The monitoring station performs preliminary coordinate transformation and position correction based on movement data received from the work machine. By pre-calculating the corrected image position using the formula x1 = x - vt*cos(θ) and y1 = y - vt*sin(θ), the system compensates for transmission delay before the operator views the image, maintaining operational accuracy despite time loss.
Solution Approach 2:
The system continuously receives movement data (position, speed, orientation) from the work machine and uses this feedback to dynamically adjust the displayed image coordinates. This closed-loop feedback mechanism ensures the displayed image always reflects the current machine position, counteracting the effects of transmission delay on operability.
2Measurement precision
If coordinate transformation is performed based on movement distance in transmission delay time, then image position accuracy is improved, but the method fails when imaging device cannot capture distant image
Solution Approach 1:
The coordinate transformation method is designed to be universally applicable regardless of the imaging device's specific capabilities. The monitoring station processes images from any work machine imaging device by applying the same coordinate correction formulas based on machine movement data, making the system adaptable to both distant-image-capable and non-capable imaging devices without requiring method changes.
Solution Approach 2:
The system adjusts the coordinate transformation parameters (movement distance vt, orientation angle θ) based on real-time machine state data. By dynamically changing these parameters according to the actual movement and orientation of the work machine, the system maintains image position accuracy across varying operating conditions and imaging device capabilities.
Data Source
AI summary
A display control device includes an image receiving unit that receives an image captured by an imaging device included in a work machine and a display control unit that processes the image based on a movement amount of the work machine in receipt delay time of the image, and generates a display signal.