Construction equipment management system
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Solution Overview
Problem
Existing building equipment management systems face challenges in accurately detecting abnormal conditions due to varying time intervals for state transitions among devices of the same type, influenced by device deterioration and differences in communication environments, which can lead to incorrect detection of normal conditions as abnormal or delayed detection of actual malfunctions when using a single reference time period.
Innovation Solution
A management system that includes an instruction transmission unit, response reception unit, detection unit, storage unit, time measurement unit, mode setting unit, and calculation unit, which calculates and updates the reference time period based on actual measurements of the time interval between instruction transmission and response reception, allowing for adaptive detection of abnormal conditions and accounting for device age and communication variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single reference time period is used for all devices, then the management system is simple to operate, but the detection accuracy of abnormal conditions deteriorates due to variations in device characteristics and communication environments
Solution Approach 1:
The patent changes the reference time period parameter dynamically based on device characteristics and communication environment. Instead of using a fixed single value, the system adjusts the reference time period to match actual device response characteristics, thereby improving detection accuracy while maintaining operational simplicity through automated parameter adaptation
2Reliability
If the reference time period is set to detect all potential abnormalities, then the detection sensitivity improves, but false alarms increase due to normal variations in device response time
Solution Approach 1:
The system uses feedback from actual device response times to continuously refine and adjust the reference time period. By monitoring the distribution of normal response times and comparing against this learned baseline, the system can distinguish between normal variations and actual abnormalities, reducing false alarms while maintaining high detection sensitivity
3Adaptability or versatility
If the reference time period is extended to accommodate slower devices, then more devices can be monitored, but the detection of actual malfunctions is delayed
Solution Approach 1:
The patent segments the reference time period into device-specific values rather than using a single universal value. Each device or device type can have its own customized reference time period based on its characteristics, allowing fast-responding devices to be monitored with shorter thresholds (enabling quicker malfunction detection) while slower devices use appropriately longer thresholds, thus eliminating the time loss without sacrificing adaptability
Data Source
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AI summary
Provided is a management system adoptable for building equipment and capable of accurately detecting abnormal conditions in the building equipment. A management system for an air conditioning apparatus includes an instruction transmission unit, a response reception unit, a detection unit, a time measurement unit, a mode setting unit, and a calculation unit. The instruction transmission unit transmits an instruction to a device included in the air conditioning apparatus. The response reception unit receives a response indicating that a state transition is made by the device in accordance with the instruction. The detection unit detects an abnormal condition. The abnormal condition is the state in which the response is not received by the response reception unit within a reference time period after transmission of the instruction by the instruction transmission unit. The time measurement unit measures the length of time from when the instruction transmission unit transmits the instruction to when the response reception unit receives the response. The mode setting unit sets the operating mode of the management system to a reference-time-period calculation mode in which calculations are performed to determine the reference time period. When the operating mode is set to the reference-time-period calculation mode, the calculation unit performs calculations to determine the reference time period based on a measurement result obtained by the time measurement unit.