Anti-overturning Warning for Work Machines Using Wheel Pressure Sensors
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Solution Overview
Problem
Existing anti-overturning warning methods for work machines are prone to untimely and incorrect judgments, especially when operating on complex or changing ground conditions, such as soft soil or landslides, leading to potential overturning risks.
Innovation Solution
The method involves acquiring positive pressures from pressure sensors at the supporting wheels of the work machine to determine the intersection point of the gravity direction with the ground and the outer contour of the supporting wheels, using these data to calculate an overturning warning boundary and assess the risk level, providing timely warnings based on the intersection point's position relative to this boundary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gravity sensors are installed on various parts of the vehicle body to calculate the center of gravity, then the overturning risk can be determined, but the judgment may be incorrect when the surrounding environment changes (e.g., soft soil or landslide)
Solution Approach 1:
The patent replaces the mechanical gravity sensor-based center of gravity calculation system with a pressure sensor-based ground reaction force measurement system. By measuring the positive pressure distribution at the supporting wheels and calculating the ground reaction force, the system directly assesses the actual ground interaction state, which is more reliable than indirect gravity measurement when ground conditions change. This substitution resolves the contradiction by making the overturning risk judgment based on actual ground contact forces rather than assumed gravitational distribution.
2Loss of time
If the center of gravity position is used to determine overturning risk, then the judgment can be made, but the warning may be untimely when the work machine changes posture due to environment changes
Solution Approach 1:
The patent implements preliminary action by continuously monitoring the positive pressure distribution at the supporting wheels and calculating the ground reaction force in real-time. This allows the system to detect changes in ground conditions and machine posture before they lead to actual overturning. By establishing an overturning warning boundary based on ground reaction force characteristics, the system can issue timely warnings when the machine approaches dangerous states, rather than waiting for center of gravity calculations to indicate risk.
Solution Approach 2:
The patent employs feedback by continuously measuring the ground reaction force through pressure sensors and comparing it against the predetermined overturning warning boundary. The system provides real-time feedback on the machine's stability status, allowing operators to take corrective action before overturning occurs. This closed-loop feedback mechanism ensures both timely warning and high reliability by continuously adjusting to changing ground conditions and machine postures.
3Measurement precision
If pressure sensors are used to measure ground reaction force, then the overturning risk can be accurately assessed, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the pressure sensor system to serve multiple functions: measuring positive pressure distribution, calculating ground reaction force, determining machine posture, and assessing overturning risk. By making the sensor system multi-functional, the patent achieves high measurement precision without proportionally increasing device complexity. The same pressure sensors that measure ground contact forces also provide information about machine orientation and stability, reducing the need for separate sensor systems.
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
This approach improves the accuracy of overturning risk assessment and provides timely warnings, reducing the likelihood of incorrect judgments and preventing overturning incidents even on challenging terrain.
Implementation Method 1
acquiring a plurality of positive pressures collected by a plurality of pressure sensors, where the plurality of pressure sensors are respectively provided at a plurality of supporting wheels of the work machine
Data Source
AI summary
Disclosed are an anti-overturning warning method and an anti-overturning warning apparatus for a work machine, a work machine and an electronic device. The anti-overturning warning method includes: acquiring a plurality of positive pressures collected by a plurality of pressure sensors. The plurality of pressure sensors are respectively provided at a plurality of supporting wheels of the work machine; obtaining an intersection point where a gravity direction of the work machine intersects a ground based on the plurality of positive pressures; and obtaining an outer contour of the plurality of supporting wheels, and performing a warning of an overturning risk of the work machine based on the intersection point and the outer contour of the plurality of supporting wheels.