Angular Position Sensor Latency Compensation Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for simultaneously measuring angular position and time using a toothed wheel sensor either require costly hardware devices or suffer from non-deterministic latency issues with software devices, leading to measurement errors.
Innovation Solution
A method that uses a hardware acquisition device to determine the angular position at the desired time, triggers a software acquisition for a substantially simultaneous measurement of angular position and time, estimates the time error, and calculates a compensated measurement by accounting for the time delay and tooth characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If software acquisition is used to measure angular position and time, then cost is reduced, but measurement precision deteriorates due to non-deterministic latency
Solution Approach 1:
The patent introduces a compensation mechanism that acts as an intermediary between the software acquisition system and the desired precise measurement. By calculating and compensating for the latency delay based on tooth characteristics and acquisition timing, the system achieves precise simultaneous measurement of angular position and time without requiring expensive hardware acquisition devices
Solution Approach 2:
The patent changes the approach from directly relying on software acquisition timing to using a compensated measurement approach. By introducing compensation parameters (latency delay calculation, tooth duration, angular resolution) and transforming the raw software acquisition data into compensated values, the system achieves hardware-level precision through software processing
2Measurement precision
If hardware acquisition device is used to measure angular position and time simultaneously, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of hardware acquisition and software processing by using a single software acquisition device to perform both angular position and time measurements. The compensation mechanism combines information from tooth characteristics, acquisition timing, and latency calculations to achieve simultaneous measurement without requiring separate hardware devices
Solution Approach 2:
The software acquisition device is made multi-functional by enabling it to perform both angular position measurement and time measurement through the compensation mechanism. The same software device that reads angular position also captures time information and calculates latency compensation, eliminating the need for dedicated hardware acquisition devices
Data Source
AI summary
Method for compensating a reference measurement including a measurement of angular position α and a measurement of time T1 that are simultaneous at the time t1, for an angular position sensor of the type including a toothed wheel, includes the following steps: determination of a first measurement α of corresponding angular position at the moment in time t1 when a reference measurement is desired; triggering of a software acquisition function; substantially simultaneous acquisitions of a second measurement α′ of the angular position and of a measurement T2 of the time by software acquisition at a time t2; estimation of an error ΔT; and calculation of the compensated measurement of time, T1=T2−ΔT. A Sensor for measuring angular position, of the type including a toothed wheel, implementing such a compensation method is described.