Tilt Sensor Leveling Device Response Delay Compensation
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Solution Overview
Problem
Conventional leveling methods using tilt sensors in surveying instruments require excessive time to complete the leveling operation due to response delays and limitations in detecting tilt angles beyond the dynamic range, leading to inefficient leveling processes.
Innovation Solution
A method and device that pre-emptively determine the response delay of tilt sensors, tilt in alternating directions to detect 0 points, calculate driving times based on these delays, and maintain tilting conditions to quickly converge the leveling operation, utilizing reduced driving speeds and optimized timing to shorten the leveling time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional leveling methods using tilt sensors are used, then leveling operation can be performed, but the converging time is excessively long due to response delays and sensor limitations
Solution Approach 1:
The system performs preliminary actions by detecting the dynamic range limits and response delay characteristics of the tilt sensor before the main leveling operation. The control unit stores the tilt angles at which the sensor output saturates (dynamic range boundaries) and the response delay time, then uses this pre-acquired information to optimize the leveling process by adjusting driving speed and predicting sensor response, thereby reducing converging time while maintaining reliability
Solution Approach 2:
The system dynamically adjusts the driving speed of the tilting mechanism based on the detected tilt angle and sensor response characteristics. When the tilt angle approaches the dynamic range boundaries or during critical convergence phases, the driving speed is automatically reduced to allow the sensor to accurately track the leveling state, preventing overshooting and improving detection reliability without excessively extending the overall leveling time
2Productivity
If tilt sensor driving speed is increased to reduce leveling time, then productivity improves, but measurement precision deteriorates due to response delays
Solution Approach 1:
The system implements periodic action by using alternating high-speed and low-speed driving phases. During most of the leveling process, the mechanism drives at high speed to improve productivity. When the tilt angle approaches zero or the dynamic range boundaries, the system switches to low-speed periodic adjustments, allowing the tilt sensor to accurately track the leveling state and complete the convergence process with high precision
Solution Approach 2:
The control unit continuously monitors the tilt sensor output and compares it with the target zero position. Based on the feedback signal and the pre-stored response delay characteristics, the system dynamically adjusts the driving speed - reducing speed when the sensor response lags behind the actual tilt change, and increasing speed when the sensor accurately tracks the position, thereby maintaining measurement precision while optimizing productivity
Data Source
AI summary
A leveling method in a device main unit with tilt sensors, wherein said method comprises a step of obtaining a response delay of said tilt sensors in advance, a step of tilting said device main unit in a first direction so that said tilt sensors detect a first 0 point, a step of tilting said device main unit in a second direction reverse to said first direction so that a second 0 point is detected after said first 0 point has been detected, a step of obtaining a time up to the detection of both 0 points, a step of calculating a driving time to tilt in the first direction further from said second direction based on said time and said response delay, a step of tilting said device main unit for the driving time, a step of maintaining tilting condition for a predetermined time after tilting and a step of converging by performing leveling operation based on detection result of said tilt sensors after the predetermined time passing.