Work Vehicle Inclination Sensor Diagnosis at Reference Stop Positions
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Solution Overview
Problem
Abnormalities in the inclination sensor of a work vehicle can affect its travel, and there is a need to monitor the presence or absence of such abnormalities effectively.
Innovation Solution
A management system for a work vehicle that includes a standard value calculation unit to determine the presence or absence of abnormality in the inclination sensor by calculating a standard value based on detection values when the vehicle stops at a predetermined position, using both a reference attitude angle sensor and a diagnosis unit to assess the normalcy of the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the work vehicle travels based on detection value of the inclination sensor, then the vehicle can maintain proper orientation and travel path alignment, but if an abnormality occurs in the inclination sensor, the abnormality may affect the travel and cause positioning errors
Solution Approach 1:
The system performs preliminary diagnosis of the inclination sensor by comparing detection values at a predetermined position where the vehicle should be level. A standard value is calculated when the vehicle is known to be in a reference state (at the predetermined position), and this standard value is used to verify sensor accuracy before normal travel operations. This preliminary check prevents abnormal detection values from causing positioning errors during travel.
2Reliability
If a diagnosis system is implemented to monitor inclination sensor abnormalities, then sensor reliability can be monitored, but the system complexity increases due to additional diagnosis units and standard value calculation requirements
Solution Approach 1:
The diagnosis unit utilizes existing sensor data and vehicle position information to perform sensor verification, rather than requiring completely separate diagnostic hardware. The predetermined position serves as both a operational location and a diagnostic reference point. The standard value calculation repurposes normal sensor readings taken at a known reference state, making the diagnosis function integrated into the existing sensor system rather than adding entirely separate complexity.
Data Source
AI summary
A management system for a work vehicle includes: a standard value calculation unit that calculates a standard value related to a detection value based on the detection value of a first attitude angle sensor when a work vehicle including the first attitude angle sensor stops at a predetermined position of a work site; and a diagnosis unit that determines presence or absence of abnormality of a second attitude angle sensor based on the standard value calculated by the standard value calculation unit and a detection value of the second attitude angle sensor when a work vehicle including the second attitude angle sensor stops at the predetermined position.