Screed Head Control Using Gyro Sensor for Concrete Leveling
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Solution Overview
Problem
Screeding machines face challenges in accurately leveling and smoothing uncured concrete surfaces due to reliance on angle sensors that provide incorrect data during changes in speed or direction, leading to errors in pitch and roll angle determination, especially when one of the laser receivers is blocked.
Innovation Solution
Incorporating a gyro sensor to complement and correct angle sensor data, determining when the angle sensor data is compromised and adjusting the screed head control based on signals from both elevation sensors and gyro sensor data to ensure accurate angle determination and adjustment during screeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If angle sensor data is used to determine pitch and roll angles during screeding, then the screed head control can be simplified, but the measurement precision deteriorates when the machine changes speed or direction
Solution Approach 1:
The patent combines data from multiple sensors (angle sensor, gyro sensor, and optionally accelerometer) to determine pitch and roll angles. The control system processes signals from both the angle sensor and gyro sensor, merging their respective measurements to achieve accurate angle determination during dynamic operation when the machine changes speed or direction.
Solution Approach 2:
The control system continuously receives feedback from both the angle sensor and gyro sensor, processing their signals in real-time to determine accurate pitch and roll angles. This feedback mechanism allows the system to compensate for the limitations of individual sensors by using the complementary information from the gyro sensor, which remains accurate during dynamic movement.
2Adaptability or versatility
If reliance is placed on angle sensor during column block situations, then the control system can operate with limited sensor input, but the reliability of angle determination deteriorates
Solution Approach 1:
The gyro sensor acts as an intermediary that provides alternative or complementary information when the angle sensor data becomes unreliable during column block situations. The control system uses the gyro sensor data to determine pitch and roll angles when the angle sensor cannot provide accurate measurements, ensuring continuous reliable operation.
Solution Approach 2:
The control system dynamically changes the parameters used for angle determination based on operating conditions. During column block situations, it switches from relying primarily on angle sensor data to using gyro sensor data, thereby adapting the measurement parameters to maintain reliability under degraded sensor conditions.
3Measurement precision
If gyro sensor is added to correct angle sensor data, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The control system is designed to process signals from multiple sensor types (angle sensor, gyro sensor, and optionally accelerometer), making it universally capable of determining pitch and roll angles under various operating conditions. This multi-functional approach allows the system to use the most appropriate sensor data depending on the situation, justifying the added complexity through enhanced versatility and accuracy.
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 control of the screed head, even during lateral motion or changes in speed, by using gyro sensor data to correct angle sensor errors, ensuring consistent grade setting and surface finish.
Implementation Method 1
a gyro sensor disposed at the screed head assembly to sense a pitch and/or roll rotational velocity of the screed head assembly
Implementation Method 2
an angle sensor disposed at the screed head assembly to sense a roll angle of the screed head assembly and/or a pitch angle of the screed head assembly
Data Source
AI summary
A method for screeding an uncured concrete surface includes providing a screeding machine having a screed head assembly movable over the concrete surface. A pair of elevation sensors disposed at opposite ends of the screed head assembly sense an elevation of the respective end of the screed head assembly. An angle sensor disposed at the screed head assembly senses a pitch angle and/or a roll angle of the screed head assembly. A gyroscope sensor disposed at the screed head assembly senses rotational velocity of the screed head assembly about a lateral axis and/or a longitudinal axis of the screed head assembly. A control determines pitch angle and/or roll angle of the screed head assembly. The control controls the screed head assembly based on the signals from one or both of the elevation sensors and the determined pitch and/or roll angles.