Sonic Sensor Laser Alignment for Paving Material Height Measurement
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Solution Overview
Problem
Conventional paving systems face challenges in accurately measuring the height of paving material deposited in front of a screed, as the position of sonic sensors used for this measurement is difficult to adjust without visual indication, affecting the accuracy of the measurement.
Innovation Solution
A system combining a sonic sensor and a laser pointer, where the sonic signal and laser beam are aimed at a common position, allowing for adjustable positioning to ensure accurate measurement of the paving material height, with optional integration or coupling to an actuator and controller for automated adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position of the sonic sensor is adjusted to improve measurement accuracy, then the accuracy of determining material height is improved, but the ease of operation deteriorates due to lack of visual indication for proper positioning
Solution Approach 1:
A laser pointer is introduced as an intermediary device that provides visual indication of the measurement location. The laser beam projects onto the paving material to show exactly where the sonic sensor is measuring, enabling the operator to visually confirm and adjust the sensor position to achieve accurate measurements at the desired location.
2Adaptability or versatility
If the sonic sensor position is made adjustable to target different material positions, then the adaptability improves for various measurement needs, but the device complexity increases due to additional positioning mechanisms
Solution Approach 1:
The laser pointer serves multiple functions: it provides visual indication of the measurement location, guides the operator in positioning the sonic sensor, and confirms the target measurement point on the material. This multi-functional approach achieves adaptability without requiring complex positioning mechanisms for the sonic sensor itself.
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
Enables reliable and easy adjustment of sensor position for precise measurement of paving material height, improving the accuracy of determining the correct auger rotational speed for uniform material distribution.
Implementation Method 1
the sonic sensor directs a sonic signal towards the paving material that has been spread by the auger and the time interval it takes for the signal to bounce back to the sensor is used to determine the height of the material
Implementation Method 2
A laser pointer is coupled to the sonic sensor to provide visual indication of the location of the sonic signal on the loose paving material
Data Source
AI summary
A system for measuring the height of paving material distributed by an auger of a paving machine in front of a grading implement, such as a screed, is disclosed. The system includes a sonic sensor and a laser pointer. The sonic sensor generates a sonic signal which is directed at the paving material distributed by the auger. The laser pointer generates a laser beam which is similarly directed at the paving material that has been distributed by the auger. The laser beam and the sonic signal meet at a common position on the paving material.