Machine State Data Collection With On-Demand Historical Retrieval
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Solution Overview
Problem
Conventional collection systems for industrial machines face increased communication and processing loads due to high volumes of state data, particularly when trying to view detailed historical data after an abnormality is detected, as they only increase transmission frequency post-detection, making it difficult to access past detailed information efficiently.
Innovation Solution
A collection device and method that acquire state data in a predetermined cycle, transmit partial data under a first condition, store non-transmitted data, and transmit it upon demand based on a command designating a past time, reducing communication load by adjusting transmission conditions and frequencies, and allowing for detailed past data access while minimizing usual state data volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the frequency of transmission of state data is increased after detection of an abnormality, then detailed information from the abnormality detection point onward can be obtained, but it becomes difficult to view detailed information from a specific time in the past such as when the abnormality was detected and the period before and after this point
Solution Approach 1:
The collection device stores state data locally in its own storage unit before any abnormality detection or data request occurs. This preliminary storage action ensures that detailed historical data is preserved and can be transmitted to the management server on demand, without requiring increased transmission frequency after abnormality detection. The data is prepared in advance for potential retrieval.
Solution Approach 2:
The collection device acts as an intermediary between the machine and the management server, maintaining a local storage buffer. This intermediary storage capability allows the system to decouple the transmission frequency from the data collection frequency, enabling detailed past data to be retrieved without requiring continuous high-frequency transmission to the management server.
2Loss of information
If the volume of state data transmitted to the management server is increased to provide detailed historical data, then detailed past data can be accessed, but communication load and processing load on the management server increase
Solution Approach 1:
The patent extracts the data storage function from the management server and places it in the collection device's local storage unit. This extraction allows detailed state data to be stored locally without occupying management server resources. When data is needed, only the necessary portions are transmitted to the server, rather than continuously transmitting all historical data.
Solution Approach 2:
Instead of transmitting all collected state data continuously to the management server, the system transmits only partial data - specifically, detailed historical data is transmitted on-demand when requested by the management server or user. This partial transmission approach reduces routine communication load while maintaining the capability to provide detailed information when needed.
Data Source
AI summary
To provide a collection device, a collection method, and a collection program capable of making detailed data in the past available for viewing according to demand while reducing the volume of communication data in a usual state. A collection device comprises: an acquisition unit that acquires state data about a machine in a predetermined cycle; a first transmission unit that transmits partial data belonging to the state data and matching a first condition set in advance to a management server; a storage unit that stores state data not having been transmitted from the first transmission unit to the management server; and a second transmission unit that, in response to a first command including designation of a time in the past, transmits state data from the designated time onward stored in the storage unit to the management server.