Sensor Data Transmission System Using Merged Signal Bus
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Solution Overview
Problem
Existing sensor data transmission systems for security control systems are cumbersome due to the abundance of dedicated wires, which increases costs and reduces system robustness, and retrofitting these systems is not practical.
Innovation Solution
A sensor data transmission system that uses a daisy-chained communication network with a resistor to supervise the conductor loop, allowing sensors to communicate efficiently and reducing the need for dedicated wiring by using a central processor to interpret unique peak patterns generated by modules within the sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated wires are used for each sensor condition signal, then signal transmission reliability is improved, but wiring complexity and cost increase
Solution Approach 1:
Multiple sensor condition signals are merged into a single communication bus, allowing multiple signals to share the same physical medium. The system combines alarm, tamper, and other condition signals onto one communication line, eliminating the need for separate dedicated wires for each signal type.
Solution Approach 2:
The communication bus serves multiple functions simultaneously - it carries power, data, and various condition signals (alarm, tamper, etc.) between sensors and the control panel. This multi-functional approach replaces the traditional one-wire-one-signal paradigm.
2Reliability
If dedicated wires are used for each sensor condition signal, then signal interference is reduced, but system cost increases
Solution Approach 1:
Multiple condition signals are combined onto a single communication bus, reducing the quantity of wires required. The system uses one shared communication medium instead of multiple separate wires, directly reducing material costs and installation expenses.
3Reliability
If traditional hard-wired sensor systems are used, then system robustness is improved, but retrofitting feasibility deteriorates
Solution Approach 1:
The communication bus provides universal connectivity that can accommodate multiple sensor types and conditions through a single interface. This universal approach simplifies retrofitting as existing infrastructure can be leveraged and new sensors can be integrated without requiring separate wiring for each device.
Solution Approach 2:
The system allows for dynamic configuration and expansion of sensor nodes along the communication bus. New sensors can be added or removed without restructuring the entire wiring system, providing flexibility for retrofits and future expansions.
Data Source
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AI summary
A sensor data transmission system includes a central processor, first and second sensor assemblies, and first and second conductors. The sensor assemblies each include a sensor, a processor and a relay. The sensor is configured to detect a condition. The processor is configured to receive a condition detected signal from the sensor and open the respective relay at least once indicative of the condition and within a pre-determined time interval. The first conductor is electrically in contact with the processors of the first and second sensor assemblies and is interposed by the relay of the second sensor assembly. The second conductor is electrically in contact with the central processor and the processor of the first sensor assembly and is interposed by the relay of the first sensor assembly.