Wireless Hazard Detector Isolating Electrical Interference
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Solution Overview
Problem
Existing hazard detectors connected to multiple evaluation units can trigger false alarms due to current fluctuations between interfaces, making it difficult to connect them to multiple fire detector and extinguishing control centers without causing interference.
Innovation Solution
A hazard detector with a wireless data connection between two electronic assemblies allows for independent transmission of alarm signals to remote evaluation units, preventing false alarms by isolating electrical connections and using standardized transceivers for secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hazard detector is electrically connected to multiple evaluation units via wired interfaces, then the detector can transmit alarm signals to multiple fire detector control centers and building management systems, but current fluctuations and voltage equalization between interfaces can trigger false alarms
Solution Approach 1:
The patent replaces wired electrical connections with wireless communication interfaces. The hazard detector uses wireless transceivers (WiFi, Bluetooth, Zigbee) to communicate alarm signals and status data to multiple evaluation units without physical electrical contact, thereby eliminating current fluctuations and voltage equalization issues that cause false alarms while maintaining the ability to connect to multiple systems
Solution Approach 2:
The patent introduces a microcontroller unit (MCU) as an intermediary that manages all communication interfaces. The MCU processes sensor data locally and selectively transmits only genuine alarm signals through multiple wireless interfaces to different evaluation units, preventing false alarm propagation while enabling multi-connection capability
2Ease of operation
If wired electrical connections are used between the hazard detector and evaluation units, then power can be supplied and data can be transmitted simultaneously, but electrical interference and potential equalization currents cause measurement errors and false event detection
Solution Approach 1:
The patent replaces electrical wiring with wireless communication technology. The hazard detector is equipped with wireless transceivers that transmit data and receive commands wirelessly, while power is supplied separately through a dedicated power interface. This separation eliminates electrical interference and potential equalization currents between data and power lines
Solution Approach 2:
The patent separates power supply and data communication into independent channels. Power is provided through a dedicated power interface, while data transmission occurs through separate wireless communication interfaces. This segmentation prevents electrical interference between power and data signals while maintaining operational convenience
Data Source
AI summary
The invention relates to a hazard detector for an evaluation unit (12, 14), e.g. a fire detector and/or extinguishing control center (12). The hazard detector (10) comprises a housing (16) having at least one sensor unit (22) or a sensor interface for connecting the sensor unit (22) to capture a hazard parameter. Moreover, the hazard detector (10) comprises a first electronic assembly (26), electrically connected to the sensor unit (22) or the sensor interface, for processing sensor signals of the sensor unit (22), and a second electronic assembly (30), connected to at least one first interface (38) for electrically connecting the second electrical assembly (30) to a physically remote evaluation unit (12, 14). In this arrangement, the first electronic assembly (26) and the second electronic assembly (30) comprise a wireless data connection (32) for transmitting the processed sensor signals from at least the first electronic assembly (26) to the second electronic assembly (30). At least the first electronic assembly (26) and the second electronic assembly (30) are arranged inside the housing (16). Further, the invention relates to a method for transmitting hazard signals and to a system having the hazard detector (10).