Wireless Synchronous System Using Time-Division Multiplexing for Delay Compensation
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Solution Overview
Problem
Conventional wireless synchronous systems for high-speed cameras and sensor devices are complex to operate, prone to inaccurate synchronization due to delay measurement uncertainties in digital radio transmission, and require multiple radio units, increasing system scale and cost, while also limiting the ability to record three-dimensional data.
Innovation Solution
A wireless synchronous system with plural apparatuses and sensor devices, each equipped with a communicating unit, a radio synchronizing-signal generating unit, and a controlling unit, allowing for synchronized communication and data acquisition with predetermined cycles, enabling accurate and efficient synchronization of operations and data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse signal measurement method is used for delay correction, then synchronization accuracy is improved, but operational complexity increases and ease of operation deteriorates
Solution Approach 1:
The system automatically performs delay measurement and correction without requiring manual pulse signal injection or complex user configuration. The master apparatus autonomously measures transmission delays to slave apparatuses and compensates for them, eliminating the need for users to perform complicated setup procedures while maintaining high measurement precision.
2Adaptability or versatility
If multiple radio units are equipped in master apparatus to communicate with multiple slave apparatuses, then communication capability is improved, but device complexity and cost increase
Solution Approach 1:
The master apparatus uses a single radio unit that time-division multiplexes communication with multiple slave apparatuses. Instead of equipping one radio unit per slave apparatus, the system combines multiple communication functions into one radio unit by sequentially establishing synchronous communication with different slaves, thereby reducing device complexity while maintaining versatility.
Solution Approach 2:
The master apparatus periodically switches communication targets among multiple slave apparatuses in a time-division manner. By cyclically establishing synchronous communication with different slaves at predetermined intervals, the system achieves multi-apparatus communication capability using a single radio unit, avoiding the need for multiple concurrent radio units.
3Ease of operation
If digital radio transmission is used for synchronizing plural apparatuses, then ease of operation is improved, but measurement precision deteriorates due to uncertain delays
Solution Approach 1:
The master apparatus measures the transmission delay by sending a timing signal to slave apparatuses and receiving the signal back, then uses this measured delay information to compensate for timing offsets. This feedback mechanism allows the system to automatically correct for digital radio transmission uncertainties while maintaining ease of operation, as the correction happens automatically without requiring manual calibration.
Data Source
AI summary
A wireless synchronous system includes an apparatus and a sensor device. The apparatus has a radio communication unit for performing synchronous communication with an external apparatus. The apparatus generates a radio synchronizing signal having a predetermined cycle synchronized with the synchronous communication and determines a timing of controlling the apparatus based on the radio synchronizing signal. The sensor device has a radio communication unit for performing synchronous communication with the external apparatus. The sensor generates a radio synchronizing signal having a predetermined cycle being synchronized with the synchronous communication, obtains detection-data representing a state of the sensor device, and determines a timing of obtaining the detection-data in accordance with the radio synchronizing signal.