Dual-Interface Sensor Communication for Data Integrity
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Solution Overview
Problem
Current interfaces for sensor devices to control systems, such as incremental interfaces (IIF) and UVW interfaces, primarily transmit angle information without verifying data integrity, leading to potential errors due to noise and lower resolution.
Innovation Solution
Implementing a dual-interface system where a high-resolution first interface transmits primary sensor data and a second interface, with lower data rate and integrity verification capabilities, transmits redundant or additional data, including diagnostic information, using protocols like SPC-based edge-based pulse-width modulation for error detection and correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single interface is used to transmit sensor data, then device complexity is reduced, but data integrity and reliability deteriorate due to inability to verify transmission accuracy
Solution Approach 1:
The patent divides the data transmission function into two separate interfaces: a first interface for transmitting primary sensor data and a second interface for transmitting redundant sensor data and integrity verification information. This segmentation allows the system to verify data integrity through comparison while maintaining relatively simple individual interface designs.
2Measurement precision
If a high-resolution interface is used for sensor data transmission, then measurement precision is improved, but susceptibility to noise and errors increases
Solution Approach 1:
The patent implements a feedback mechanism where the control system transmits integrity verification information (such as checksums or error detection codes) back through the second interface, and the sensor device uses this feedback to detect and correct transmission errors, thereby maintaining high measurement precision while reducing noise susceptibility.
Solution Approach 2:
The patent employs error detection and correction codes that are prepared in advance and transmitted along with the sensor data. These pre-prepared verification mechanisms cushion against the harmful effects of noise and transmission errors before they can corrupt the high-resolution measurement data.
3Reliability
If redundant data transmission is implemented, then data integrity is improved, but communication bandwidth and time consumption increase
Solution Approach 1:
The patent transmits redundant sensor data through the second interface, but only at a lower resolution or with reduced frequency compared to the primary data transmission. This partial redundancy provides sufficient error detection and verification capability without duplicating the full bandwidth requirements of the primary interface.
Data Source
AI summary
Sensor device, control system and method of communication between a sensor device and a control system. Sensor devices, control systems and methods for communication between sensor devices and control systems are provided. In these, sensor data are transmitted via first interfaces and redundant sensor data and/or other data are transmitted via second interfaces.