Vibratory Compactor Drum Acceleration Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibratory compactor drum measurement systems face challenges in accurately measuring compaction forces due to the need for a movable sensor that can withstand rotational movement and prevent signal distortion from vibrations.
Innovation Solution
A drum assembly with a rotatable sensor mounted on a hub via a flexible strap, allowing limited rotational movement and maintaining communication path integrity, enabling accurate acceleration measurement and minimizing signal distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is mounted on a nonrotating element of the drum, then the sensor remains stationary and stable, but the sensor cannot accurately measure the acceleration of the rotating drum
Solution Approach 1:
The patent introduces a rotating hub as an intermediary component between the stationary drum structure and the sensor. The hub rotates with the drum and carries the sensor, allowing the sensor to measure drum acceleration while the hub's rotational movement is constrained by a flexible strap to prevent excessive motion that would distort signals.
Solution Approach 2:
The patent transitions from a static sensor mounting (nonrotating) to a dynamic mounting system where the sensor is carried on a rotating hub. The flexible strap provides dynamic constraint, allowing necessary rotational movement while limiting excessive motion, thus adapting the sensor system to the rotating drum environment.
2Measurement precision
If the sensor is mounted on a moveable element of the drum, then the sensor can measure drum acceleration, but the sensor signal may become distorted due to vibrations and rotational movement
Solution Approach 1:
The flexible strap provides dynamic constraint to the rotating hub, allowing it to rotate with the drum while preventing excessive rotational movement. This dynamic limitation reduces vibration-induced signal distortion while maintaining the sensor's ability to measure drum acceleration.
Solution Approach 2:
The flexible strap changes the rotational parameter of the hub by limiting its angular displacement. This parameter control reduces the amplitude of vibrations transmitted to the sensor, thereby minimizing signal distortion while preserving measurement capability.
3Adaptability or versatility
If a flexible strap is used to connect the bearing to the frame, then the strap allows rotational movement and accommodates drum motion, but the strap may become tangled or distorted
Solution Approach 1:
The flexible strap is designed to be dynamic rather than rigid, allowing it to accommodate the rotational movement of the drum and hub. The strap's flexibility enables it to bend and flex with the motion while maintaining connection, preventing tangling through controlled flexibility rather than rigid constraint.
Data Source
AI summary
A drum assembly for a vibratory compactor and method of retrofitting a vibratory compactor to measure the acceleration and/or vibratory movement of a drum rotatably mounted on the frame of the vibratory compactor. The drum assembly may comprise a drum including a shell, a mounting wall disposed inside the drum and a bulkhead disposed inside the drum and attached to the shell, a first bearing disposed between the frame and the mounting wall, a second bearing, a sensor, and a strap. The first bearing may include an inner race fixedly mounted to the frame. The second bearing may comprise a hub and a bearing shaft circumscribed by the hub and mounted to the bulkhead of the drum. The strap may be attached to the inner race and the hub.