Encoder Serial Format Adaptation for Accurate Multi-Turn Position Data
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Solution Overview
Problem
In control systems with encoders performing serial communication, the varying amount of multi-rotation data and position data within a single rotation can lead to incorrect data transmission, especially in battery-less encoders, where the data format is not automatically determined, resulting in incomplete or inaccurate position information.
Innovation Solution
An encoder and control system that includes a position information generating unit, a configuration information generating unit, and a transmission unit to transmit position information and configuration information as serial data, allowing the control device to process the data optimally by determining the ratio of absolute position data and multi-rotation data, thereby ensuring correct data transmission without manual parameter settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a specific data format is determined for serial communication, then communication efficiency is improved, but the encoder cannot accommodate varying amounts of multi-rotation data and position data
Solution Approach 1:
The patent applies dynamics by making the data format configurable and adaptable. The encoder includes a configuration information generating unit that dynamically determines the data format based on the actual amounts of multi-rotation data and position data. This allows the system to switch between different data formats (e.g., 10-bit/18-bit, 12-bit/16-bit, 14-bit/14-bit divisions) depending on the encoder's capabilities, resolving the contradiction between fixed-format efficiency and variable-format adaptability.
2Device complexity
If the amount of multi-rotation data and position data is fixed, then serial communication format is simplified, but correct position data cannot be obtained for all encoder types
Solution Approach 1:
The patent applies parameter changes by allowing the data format parameters (bit allocation for multi-rotation data vs. position data) to vary based on the encoder type. The configuration information generating unit selects appropriate parameter combinations (different bit allocations) to match the encoder's data capabilities. This ensures that each encoder type transmits data in the optimal format, maintaining both communication simplicity and position data accuracy.
3Measurement precision
If manual parameter settings are required for data format, then data transmission accuracy is improved, but system operation becomes more complex
Solution Approach 1:
The patent applies self-service by enabling the encoder to automatically generate and transmit configuration information that describes its data format capabilities. The control device receives this configuration information and automatically configures the communication parameters accordingly. This eliminates the need for manual parameter settings while ensuring accurate data transmission, as the encoder self-describes its capabilities and the control device adapts automatically.
Data Source
AI summary
A control system includes an encoder and a control device that controls a target object by using information transmitted from the encoder by serial communication. The encoder includes a position information generating unit that generates position information made of a predetermined amount of data and including absolute position data of an object to be detected; a configuration information generating unit that generates configuration information representing a ratio of the absolute position data in the amount of data during serial communication; and a transmission unit that transmits, to the control device, the position information and the configuration information as a series of serial data. The control device includes a reception unit that receives the position information and the configuration information transmitted from the encoder; and a control unit that processes the position information received by the reception unit on the basis of the configuration information received by the reception unit.