Method for regulating temperatures in a wireless building management system
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Solution Overview
Problem
Existing building information models become obsolete and difficult to maintain as construction progresses, especially in identifying the correct controller for wireless devices in building control networks, leading to unreliable operation and maintenance challenges.
Innovation Solution
A method involving a processing circuit that identifies and selects controllers responsible for ventilation dampers by measuring temperature changes caused by altering air flow, determining which controller most affects the temperature, thereby identifying the correct controller for wireless devices in the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If building models are enhanced with detailed construction information from multiple subcontractors, then the comprehensiveness of the model improves, but the difficulty and time required to maintain the model increases
Solution Approach 1:
The system enables automatic identification of controller-device relationships through self-testing procedures. The wireless device and controller perform automated temperature measurements and sequential activation tests to establish their associations without manual intervention, thereby maintaining model accuracy while reducing maintenance burden
Solution Approach 2:
The system uses temperature as a measurable parameter to identify controller-device relationships. By monitoring temperature changes when controllers are sequentially activated, the system automatically determines which controller is responsible for each wireless device, maintaining model reliability without increasing maintenance complexity
2Loss of information
If the building model is updated continuously during construction, then the model remains current and useful, but the time and resources required for updates increase significantly
Solution Approach 1:
The system performs automatic controller identification during the commissioning phase before full operation begins. By establishing all controller-device associations upfront through automated testing, the model is populated with accurate information without requiring continuous updates during construction and operation
Solution Approach 2:
The system uses temperature feedback from wireless devices to automatically update controller associations. Temperature measurements provide real-time feedback that confirms which controller affects which device, allowing the model to self-update without manual intervention
3Measurement precision
If the system tests each controller sequentially to identify the correct one, then accurate identification is achieved, but the time required for setup increases
Solution Approach 1:
The system uses periodic activation of controllers in sequence, with each controller tested for a predetermined time period. This structured periodic approach ensures accurate identification while minimizing total testing time by systematically cycling through controllers rather than using trial-and-error methods
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for accurate identification and control of wireless devices within the building network, enhancing the reliability and maintainability of building systems by ensuring correct controller assignment and optimizing energy management.
Implementation Method 1
obtain a temperature measurement within the space with a sensor unit
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A building system includes a communication network, a plurality of wireless nodes, a plurality of passive wireless devices, a plurality of sensors, and a processing circuit. The wireless nodes are disposed within a building and are operably coupled to the communication network. Each passive wireless device is affixed to an object within the building, and contains first information regarding at least one property of the object. Each passive wireless device is configured to communicate wirelessly to the wireless nodes using power derived from communication signals detected in the passive wireless device. The sensors are configured to generate second information representative of sensed temperature throughout the building, each sensor operably connected to the communication network. The processing circuit is operably coupled to receive the first information from the wireless devices and the second information from the sensors. The processing circuit is configured to generate control information regarding the building based on the first information and the second information.