Dig Detection via Payload Weight Rate and Cylinder Pressure
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Solution Overview
Problem
Existing dig operation detection systems in machines, such as wheel loaders, fail to accurately identify unconventional dig operations and provide inadequate detection due to various materials encountered, affecting training deficiency identification and machine productivity data.
Innovation Solution
A system utilizing an implement position sensor and pressure sensors associated with a cylinder to determine the weight of the payload and detect the dig status based on the rate of change of weight and implement position, enabling accurate detection of dig operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If known dig detection systems monitor lift and tilt linkage sensors and machine direction of motion, then the system structure is simple, but the system cannot detect unconventional dig operations and provides inadequate detection
Solution Approach 1:
The patent combines multiple sensor types (implement position sensors, pressure sensors, and machine motion sensors) into an integrated dig detection system. This merging of sensing modalities allows the system to detect both conventional and unconventional dig operations by analyzing multiple parameters simultaneously, thereby improving detection reliability without requiring overly complex individual sensor components.
Solution Approach 2:
The detection system is designed to perform multiple functions: detecting conventional dig operations, detecting unconventional dig operations, monitoring payload weight, and providing training feedback. This multi-functionality is achieved through a centralized controller that processes data from various sensors and applies multiple detection algorithms, allowing a single system to address diverse detection needs.
2Loss of information
If dig detection systems use conventional sensor monitoring, then the system is easy to operate, but machine productivity data is affected and training deficiency identification is impaired
Solution Approach 1:
The system incorporates feedback mechanisms where the controller continuously monitors sensor data, compares it against expected dig operation patterns, and provides feedback for detecting deviations. This feedback loop enables comprehensive data collection for productivity analysis and training assessment while maintaining automated operation that does not require complex manual intervention.
Solution Approach 2:
The system pre-establishes detection algorithms and thresholds for identifying both conventional and unconventional dig operations. By preparing these detection criteria in advance, the system can automatically process incoming sensor data without requiring complex real-time decision-making, thus preserving data completeness while keeping operation simple.
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 system provides reliable and accurate detection of dig operations, regardless of operator experience, improving machine productivity data and enabling real-time payload and performance monitoring.
Implementation Method 1
a pressure sensor associated with a cylinder. The cylinder is coupled to the implement. The pressure sensor is configured to generate a pressure signal indicative of a pressure of the cylinder
Implementation Method 2
an implement position sensor configured to generate a position signal indicative of a position of an implement
Data Source
AI summary
A system for determining an operational state of a machine is provided. The system includes an implement position sensor configured to generate a position signal indicative of a position of an implement. The system further includes a pressure sensor configured to generate a pressure signal indicative of a pressure of a cylinder of the machine. The system also includes a controller communicably coupled to the implement position sensor and the pressure sensor. The controller is configured to receive the position signal and the pressure signal. The controller is further configured to determine a weight of a payload of the machine based on the received signals. Further, the controller is configured to determine a dig status of the machine based, at least in part, on a rate of change of the weight of the payload and the position of the implement.