Work Machine Video Retention Using Object and Operation Sensing
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Solution Overview
Problem
Work machines like hydraulic excavators face challenges in accurately recording and retaining video data of necessary scenes due to frequent impacts during operations, leading to decreased recording accuracy and potential data loss from overwriting.
Innovation Solution
A work machine equipped with a machine body, actuators, operation sensors, photographing devices, a video data recording device, and object sensors, where a controller determines recording and retaining conditions based on sensor data to selectively record and retain video data, improving accuracy and reducing data volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video data is recorded continuously during work machine operation, then complete video coverage is achieved, but the amount of video data increases and recording accuracy decreases
Solution Approach 1:
The patent segments the continuous recording process into discrete recording intervals based on detected events (impacts, object detections, operation inputs). Instead of recording continuously, the system divides recording into event-triggered segments, thereby reducing total data volume while maintaining reliability for important scenes.
Solution Approach 2:
The system implements periodic monitoring of detection signals (impact sensors, object sensors, operation sensors) at predetermined intervals. Recording is activated periodically when specific conditions are met during these monitoring cycles, reducing unnecessary continuous recording while ensuring important events are captured.
2Quantity of substance
If overwriting processing is performed to reduce video data volume, then data storage capacity is maintained, but necessary video data may be deleted
Solution Approach 1:
The system performs preliminary detection and evaluation of recording conditions before actually recording video data. By pre-assessing whether an event meets recording criteria (impact threshold, object presence, operation input), the system avoids recording unnecessary data that would consume storage space without providing valuable information, thus preventing wasteful overwriting of potentially important data.
Solution Approach 2:
The system uses feedback from multiple sensors (impact sensors, object sensors, operation sensors) to dynamically control recording activation. This feedback mechanism ensures that recording occurs only when meaningful events are detected, optimizing the use of limited storage capacity and preventing overwriting of important data with redundant footage.
3Reliability
If recording is activated in response to impact detection, then important scenes are captured, but recording accuracy decreases due to frequent activation during work
Solution Approach 1:
The patent merges multiple detection mechanisms (impact detection, object detection, operation input detection) into a unified recording control system. By combining these different signal sources, the system reduces false activation from single-event noise and requires corroboration from multiple sensors, thereby improving recording accuracy while managing complexity through integrated control logic.
Solution Approach 2:
The control unit acts as an intermediary that processes and evaluates signals from multiple sensors before triggering recording. This intermediary layer filters out spurious signals and coordinates the combined information from impact sensors, object sensors, and operation sensors, improving the precision of recording activation decisions while providing a structured approach to managing system complexity.
Data Source
AI summary
A work machine includes: a machine body; an actuator attached to the machine body; an operation device used to operate the actuator; an operation sensor that senses an operation of the operation device; a photographing device that photographs surroundings of the machine body; a video data recording device that records video data including video photographed by the photographing device; a controller that controls the video data recording device; and an object sensor that senses an object in the surroundings of the machine body. The controller determines whether or not a recording and retaining condition including a condition that an object is present in the surroundings of the machine body and a condition that the operation device is operated is satisfied on the basis of a result of sensing in the object sensor and a result of sensing in the operation sensor, and makes the video data recording device record and retain the video data when the recording and retaining condition is satisfied.