Digital Temperature Sensor Mounting in Hazard Detectors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hazard detectors with temperature sensors are complex to produce and install due to the need for soldering processes and the routing of connecting lines through the detector housing, which complicates the integration of other detection modules.
Innovation Solution
A hazard detector with a digital temperature sensor mounted centrally in the housing, connected via a printed conductor foil that avoids routing through the housing interior, allowing for easy installation and integration of additional detection modules, and featuring a microcontroller with a digital data interface for reliable and direction-independent temperature detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is mounted in the detector housing with connecting lines routed through the housing interior, then the temperature detection function is achieved, but the device complexity increases and installation becomes more difficult
Solution Approach 1:
The temperature sensor is extracted from the conventional mounting location and repositioned to the outer surface of the detector housing. This extraction eliminates the need for connecting lines to pass through the housing interior and measuring chamber, thereby reducing construction complexity while maintaining the temperature detection function.
2Ease of manufacture
If connecting lines are routed through the measuring chamber interior, then the temperature sensor can be connected to the evaluation unit, but the installation of additional detection modules becomes more difficult
Solution Approach 1:
The connecting lines are extracted from the measuring chamber interior and rerouted along the outer surface of the housing. This extraction clears the measuring chamber interior space, enabling easier installation and integration of additional detection modules such as smoke detectors without interference from the temperature sensor wiring.
3Reliability
If conventional temperature sensors with long connecting lines are used, then the temperature can be detected, but electromagnetic compatibility is reduced due to signal noise
Solution Approach 1:
The conventional analog temperature sensor and its long analog connecting lines are replaced with a digital temperature sensor that outputs digital signals. This substitution eliminates the susceptibility to electromagnetic interference that plagues analog signals, thereby improving electromagnetic compatibility while maintaining reliable temperature detection.
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
Simplifies the installation process, reduces component costs, and enhances electromagnetic compatibility (EMC) by keeping the interior space free for other detection modules, enabling precise detection of fire parameters without the need for custom-made modules.
Implementation Method 1
A semiconductor temperature sensor, for example, can be used as the temperature sensor, in which the temperature is measured on the basis of semiconductor materials.
Data Source
Figure 1~2
Figure 3~4
AI summary
The hazard detector (1) has a digital temperature sensor (3) that is attached in or on a detector housing (2), for largely detecting temperature in the vicinity of detector in non-directional manner. An evaluation unit (4) is provided for evaluating the detected ambient temperature. The temperature sensor is arranged on an inner side (IS) of the detector housing, and is connected with the evaluation unit over a connection line (5) for data processing. The connection line is arranged away from the centrally-mounted temperature sensor to the evaluation unit.