Gyroscope Null Point Determination via Voltage Sampling Mode
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Solution Overview
Problem
Accurate determination of the null point of a gyroscope is challenging due to manufacturing variations and environmental factors like temperature, humidity, and power supply fluctuations, leading to errors in angular velocity measurements, which are critical for antenna positioning systems on moving vehicles.
Innovation Solution
A method involving sampling the gyroscope's output voltage to obtain multiple sampled voltages, assigning them to bins, counting occurrences, and selecting the voltage range with the highest count as the null point, allowing for quick and accurate calculation without relying on external references or constant angular velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional null point determination methods are used, then the system can operate with simple hardware, but measurement precision deteriorates due to manufacturing variations and environmental factors
Solution Approach 1:
The patent applies preliminary action by performing null point determination through statistical analysis of multiple sampled voltages before using the gyroscope for its primary function of measuring angular velocity. By pre-determining the null point using the mode of sampled voltages, the system establishes an accurate reference point that compensates for manufacturing variations and environmental factors, thereby improving measurement precision without adding complex real-time correction mechanisms
Solution Approach 2:
The system applies self-service by using the gyroscope's own output voltages to determine its null point, rather than requiring external reference sources or complex calibration equipment. The statistical mode of sampled voltages is calculated from the gyroscope's inherent signal variations, allowing the device to self-calibrate and improve measurement accuracy using its own operational data
2Measurement precision
If external reference sources are used for null point determination, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
The patent applies the taking out principle by removing the dependency on external reference sources for null point determination. Instead of requiring external calibration equipment or reference gyroscopes, the system extracts the null point information directly from the statistical distribution of the gyroscope's own output voltages. This eliminates complex external hardware while maintaining measurement precision through the mode calculation of sampled voltages
Solution Approach 2:
The system applies universality by making the gyroscope serve multiple functions: it both measures angular velocity and determines its own null point through statistical analysis of its output voltages. This multi-functionality eliminates the need for separate calibration equipment or external reference sources, reducing device complexity while maintaining measurement precision through self-calibration
3Measurement precision
If null point is determined under constant angular velocity conditions, then measurement precision improves, but productivity decreases due to restricted operational conditions
Solution Approach 1:
The patent applies dynamics by transitioning from static null point determination (requiring constant angular velocity conditions) to a dynamic approach where the null point is determined through statistical analysis of voltage samples collected during normal operational conditions. The mode of sampled voltages can be calculated regardless of angular velocity variations, allowing continuous null point determination that adapts to changing operational conditions, thereby improving productivity without sacrificing measurement precision
Data Source
AI summary
A system for correcting angular velocity measurements from a gyroscope and using the corrected angular velocity measurements to position an antenna used with a vehicle. The system determines an approximate null point voltage of a gyroscope of the type that produces a voltage related to an angular velocity to be measured by the gyroscope. The approximate null point is determined by sampling the output voltage to obtain a plurality of sampled voltages and choosing an approximate mode of the plurality of sampled voltages as the approximate null point voltage.