Multi-Protocol Fire Sensor Control Unit
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Solution Overview
Problem
Current fire detection systems are rigid and inflexible, requiring specific communication protocols that limit the use of different types of fire sensors and central control units, making it costly and impractical to update or replace components during the system's operational life.
Innovation Solution
An electronic monitoring and controlling unit that generates multiple digital cyclical querying signals adapted to different communication protocols (NOTIFIRE, APOLLO, and HOCHIKI) using DC-DC voltage converters and selector circuits, allowing it to manage and control fire sensors of various types simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single communication protocol is used in fire detection systems, then the system is simple and reliable, but the system loses flexibility and adaptability when needing to update or replace sensors
Solution Approach 1:
The central control unit is designed with multi-protocol capability, allowing it to communicate with fire sensors using different communication protocols (NOTIFIRE, APOLLO, HOCHIKI). This universal design enables the same control unit to manage diverse sensor types without requiring protocol-specific hardware for each sensor type, thereby maintaining system reliability while significantly improving adaptability and versatility.
Solution Approach 2:
The control unit incorporates dynamic protocol selection capability, allowing it to adapt its communication protocol based on the sensor type being accessed. This dynamic adjustment enables the system to maintain reliable communication with different sensor protocols while providing the flexibility needed for system updates and replacements without hardware changes.
2Adaptability or versatility
If the central control unit is replaced to support new sensor types, then the system can use newer sensors, but the cost increases due to requiring replacement of all sensors in the system
Solution Approach 1:
The control unit is designed as a universal platform that can communicate with multiple sensor types through different protocols. This eliminates the need to replace all sensors when upgrading to new sensor types, as the existing control unit can accommodate them. Consequently, system cost is significantly reduced while maintaining full sensor compatibility.
Solution Approach 2:
The control unit contains embedded protocol implementations that replicate the communication protocols of different sensor types within its internal architecture. This allows the control unit to 'copy' the necessary communication behaviors for various protocols without requiring physical protocol-specific hardware for each sensor type, reducing overall system cost.
3Device complexity
If the system uses fixed communication protocols, then the system structure is simple, but the system cannot be easily modified during operation
Solution Approach 1:
The control unit incorporates dynamic protocol selection capability, allowing it to adapt its communication protocol based on the sensor type being accessed. This dynamic adjustment enables the system to maintain a relatively simple structure while providing the flexibility needed for system updates and replacements without hardware changes.
Solution Approach 2:
The control unit can change its operational parameters, specifically the communication protocol used, based on the sensor type. This parameter change capability allows the system to adapt to different sensor protocols without changing the fundamental system structure, thereby maintaining simplicity while enabling modifiability.
Data Source
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AI summary
The invention relates to an electronic unit (10) for monitoring and controlling one or more fire sensors (SEN) of a fire detection system (100). Such unit comprising: - a processing stage (1); - a managing stage (2) of the sensors which can be connected and activated to generate digital cyclical querying signals (S1, S2) to be sent to the sensors to verify their operative state; - an electrical power supplying stage (3) to generate direct current electrical potentials to be supplied to the managing stage of the sensors starting from a predetermined reference power supply potential (Vcc). In such electronic unit, the electrical power supplying stage comprises a first electronic circuit (30, 40, 50) to generate: - a first potential (V1) higher than the reference potential; - a second potential (V2) equal to the reference potential; - a third potential (V3) lower than the reference potential. The managing stage of the sensors comprises a second electronic circuit (60, 61, 65, 66) to generate: a first digital cyclical querying signal which assumes a high level equal to the second potential and a low level equal to the third potential; a second digital cyclical querying signal adapted to assume a high level equal to the first potential and a low level equal to the second potential. Such first and second digital cyclical querying signals are associated with different communication protocols to be made available to the fire sensors of different type of the fire detection system.