Adjustable Stringline Sensors for Precise Slip Form Paving
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Solution Overview
Problem
Traditional stringline guidance systems for slip form paving machines lack effective control mechanisms for maintaining precise paving thickness and alignment during operations.
Innovation Solution
A slip form paving machine equipped with front and rear height-adjustable lifting columns, sensor actuators, and a controller that adjusts the longitudinal inclination of the machine frame by controlling the vertical positions of front and rear stringline sensors, ensuring consistent concrete slab height and alignment through precise actuator adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of sensor height is used, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent replaces manual mechanical adjustment of sensor height with an automated sensor actuator system. The actuator includes a motor, spindle, and leadscrew mechanism that automatically adjusts the vertical position of stringline sensors based on controller commands, eliminating the need for manual intervention while maintaining precise control over sensor positioning and paving thickness.
Solution Approach 2:
The sensor actuator system enables the paving machine to self-adjust its sensor positions automatically during operation. The controller receives input from operators or automated systems and independently controls the actuators to maintain optimal sensor alignment with the stringline, allowing the machine to self-correct positioning without manual intervention.
2Manufacturing precision
If sensor actuators are added, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The sensor actuator system is designed to perform multiple functions: it adjusts sensor vertical position, maintains sensor alignment with the stringline during machine operation, and compensates for machine frame movements. This multi-functionality justifies the added complexity by consolidating several control tasks into a single integrated subsystem.
Solution Approach 2:
The actuator system introduces dynamic adjustment capability to the previously static sensor mounting. The motor-driven spindle and leadscrew mechanism allow continuous, precise adjustment of sensor position during paving operations, transforming the sensor system from a fixed to a dynamically adjustable configuration that adapts to changing operational conditions.
3Adaptability or versatility
If longitudinal inclination adjustment is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent divides the machine frame support system into separate front and rear lifting columns that can be independently controlled. This segmentation allows the controller to adjust the inclination of the machine frame by independently actuating individual lifting columns, enabling precise control over the longitudinal slope of the paved surface while maintaining overall system stability.
Data Source
AI summary
A slip form paving machine includes a machine frame, a plurality of ground engaging wheels or tracks, and front and rear height adjustable lifting columns adjustable to adjust a longitudinal inclination of the machine frame in a paving direction. A slip form mold is supported from the machine frame. The machine further includes a front stringline sensor, a front sensor actuator arranged to adjust a vertical position of the front stringline sensor relative to the machine frame, a rear stringline sensor, and a rear sensor actuator arranged to adjust a vertical position of the rear stringline sensor relative to the machine frame. A controller is configured to send command signals to the front and rear sensor actuators to cause an adjustment in the longitudinal inclination of the machine frame.