Construction Machine IMU Angle Accuracy During Stop Transitions
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Solution Overview
Problem
Existing construction machines face inaccuracies in angular information computation by IMUs, leading to incorrect operation assistance, especially during transitions from traveling to stationary states, which can result in damaged construction surfaces.
Innovation Solution
A construction machine equipped with an angle measuring apparatus and a controller that computes postural information, stops operation assistance or provides warnings when accuracy falls below required levels, ensuring accurate angle computation and preventing the use of inaccurate postural information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If IMU sensors are used to acquire angular information for operation assistance, then responsiveness and attachability are improved, but accuracy of angle computation deteriorates during transitions from traveling to stationary states
Solution Approach 1:
The controller continuously monitors the machine body's action state through acceleration and angular velocity sensing, and uses this feedback to dynamically adjust the operation assistance execution. When the machine body is in a stopped state, the controller assesses whether angle computation accuracy has recovered to required levels before resuming operation assistance, thereby preventing use of inaccurate angular information.
Solution Approach 2:
The controller performs preliminary assessment of angle computation accuracy before resuming operation assistance after the machine body transitions to a stopped state. By evaluating whether the computed angle meets required accuracy thresholds in advance, the system prevents premature resumption that would result in inaccurate operation guidance.
2Productivity
If operation assistance is continuously provided based on IMU data, then productivity is improved, but construction surfaces may be damaged due to use of inaccurate postural information
Solution Approach 1:
The system continuously monitors the machine body's action state and angle computation accuracy, using this feedback to dynamically control operation assistance execution. When accuracy requirements are not met, operation assistance is suspended or warnings are issued, preventing damage to construction surfaces while resuming normal operation when accuracy is sufficient.
Solution Approach 2:
The controller implements protective measures by assessing angle computation accuracy before providing operation assistance. When the machine body is in a stopped state, the system evaluates whether the angle meets required accuracy thresholds in advance, and only provides operation assistance when accuracy requirements are satisfied, thereby preventing potential damage to construction surfaces.
3Duration of action of stationary object
If angle computation is performed during machine body movement, then continuity of operation assistance is improved, but accuracy of angular information deteriorates
Solution Approach 1:
The system dynamically adjusts the execution of operation assistance based on the machine body's action state and angle computation accuracy. Rather than maintaining a fixed continuous operation mode, the controller modulates operation assistance provision according to real-time conditions, suspending assistance when accuracy requirements are not met and resuming when they are satisfied.
Solution Approach 2:
The controller uses feedback from acceleration and angular velocity sensors to continuously assess the machine body's action state and angle computation accuracy. This feedback mechanism enables the system to maintain continuity of operation assistance only when accuracy requirements are satisfied, automatically suspending assistance when the machine body is moving or when angle accuracy is insufficient.
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
Prevents the use of inaccurate postural information during operation assistance, thereby avoiding damage to construction surfaces by ensuring accurate angle computation and timely intervention.
Implementation Method 1
inertial measurement units (IMUs) that are installed on the machine body and the work implement (work device), sense acceleration and angular velocities
Data Source
AI summary
A construction machine includes an angle measuring apparatus that sense acceleration and angular velocities of installation portions on a machine body and a work implement and that compute angles of the installation portions relative to a reference plane based on sensing results, and a controller that executes operation assistance of a work implement based on postural information on the machine body and the work implement computed on the basis of the angles from the angle measuring apparatus. The controller computes second required accuracy of angle computation by the angle measuring apparatus on the basis of first required accuracy set for the operation assistance, determines whether the state of the machine body has changed from an active state to a stopped state on the basis of the sensing results of the angle measuring apparatus, determines whether the computation accuracy of the angle measuring apparatus satisfies the second required accuracy, and stops the operation assistance of the work implement or gives a warning in a case where the state of the machine body has changed to a stopped state, and where the computation accuracy fails to satisfy the second required accuracy.