Hydraulic Cylinder Fault Detection Using Coupled Pressure and Depth
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Solution Overview
Problem
Existing agricultural implements lack effective detection mechanisms for undesirable positions or forces applied by ground-engaging tools, leading to inefficient planting operations due to undetected faults in control systems.
Innovation Solution
A control system that includes position sensors and pressure sensors to monitor the piston rod and fluid pressure within fluid cylinders, with a controller comparing expected and actual changes to identify faults, enabling real-time detection and diagnosis of issues in ground-engaging tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no detection mechanism is installed, then the system remains simple, but faults in ground-engaging tools cannot be detected
Solution Approach 1:
The patent implements feedback by installing sensors (position sensors and pressure sensors) that continuously monitor the operational parameters of ground-engaging tools and feed this information back to a controller. The controller compares actual readings with expected values to detect faults, enabling real-time monitoring without requiring complex manual inspection systems.
Solution Approach 2:
The patent replaces complex mechanical detection mechanisms with electronic sensing systems. Instead of using mechanical linkages and physical indicators to detect tool position and force, the system uses electronic sensors to measure position and pressure, converting mechanical parameters into electrical signals for easier processing and analysis by the controller.
2Productivity
If manual inspection is used, then the system remains simple, but planting operations become inefficient due to undetected faults
Solution Approach 1:
The system implements self-service by automatically monitoring its own operational status through sensors and controllers. The ground-engaging tools' health is assessed autonomously without requiring external manual inspection, allowing the planting operation to continue efficiently while faults are detected and reported in real-time.
Solution Approach 2:
Real-time feedback from position and pressure sensors enables continuous monitoring of tool performance during planting operations. The controller receives ongoing data streams and immediately identifies deviations from expected behavior, allowing for prompt fault detection without interrupting the planting workflow.
3Measurement precision
If sensors are installed to monitor position and pressure, then fault detection improves, but system cost and complexity increase
Solution Approach 1:
The patent replaces complex mechanical measurement devices with modern electronic sensors that offer superior precision at lower cost. Position sensors and pressure sensors provide accurate digital readings that are easily processed by microcontrollers, simplifying the overall measurement system while improving accuracy compared to traditional mechanical gauges and indicators.
Data Source
AI summary
A control system includes a position sensor configured to monitor a position of a piston associated with a fluid cylinder and a pressure sensor configured to monitor a fluid pressure inside the fluid cylinder. The control system includes a controller configured to receive signals from the position sensor and the pressure sensor to determine a position change and a pressure change during a certain period of time. The controller is configured to compare the position change to an expected position change associated with the pressure change and compare the pressure change to an expected pressure change associated with the position change. The controller is configured to identify a fault in response to determining the position change is not within a first threshold range of the expected position change, or determining the pressure change is not within a second threshold range of the expected pressure change, or a combination thereof.