• Land and Housing Review
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• v.13 no.4
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• pp.105-114
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• 2022

Non-fire activated fire alarms caused by such actions as cigarette smoke, cooking, and high humidity are fire safety risk factors. In such instances, it is important to quickly locate and replace the actuated detector. However, it is difficult to locate those detectors because most do not have an address function. While new apartments can incorporate addressable fire alarm detectors, in existing apartments there are limitations in converting over to addressable detectors due to cost and power line issues. This study developed an efficient address function for fire alarms in existing apartments. The newly developed system consists of the existing receiver, and a proposed addressable repeater and detector. Utilizing an experimental setup, the performance of the proposed address monitoring system was confirmed to be stable and compatible with the receiver and existing detectors.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.6
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• pp.1038-1045
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• 1994

In this paper, algorithm and built-in test circuit for testing all PSF(Pattern Sensitive Fault) occuring in CAM(Content Addressable Memory) are proposed. That is, built-in test circuit that uses minimum additional circuit without external equipment is designed. Additional circuit consist`s of parallel comparator, error detector, and modified decoder for parallel testing. Besides, the study on eulerian path for effectiv test pattern is carried out simultaneously. Consequently, using proposed algorithm, we can test all contents of CAM with 325+2b(b:number of bits) operations regardless of number of words. The area occupied by test circuit is about 7.5% of total circuit area.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.25 no.5
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• pp.39-44
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• 2011

Automatic fire alarm system is set up to automatically detect fire on buildings. Because of economic reasons, P-type receiver and a conventional type fire detector is normally used for automatic fire alarm system in Korea. Because early detection of fire is regarded as important, the need of finding technique of fire location increases. This paper is studied a method to improve a reliability and add a function of fire location detection on a conventional type fire detector and P-type receiver. Fire location is detected by a method that controller attached on the receiver and the detector is read with a time lag. A reliability of fire detection alarm system is improved with a method that false fire alarm is able to decrease using two different principle detector together. This paper is studied for basic data of improvement of low-cost addressable automatic fire alarm system.

• Fire Science and Engineering
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• v.24 no.4
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• pp.1-11
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• 2010

This paper describes a design and implementation of an analog detector and a fire alarm system with recent technology on information and communication. A hierarchical architecture design from the detector to the main system enables to accommodate medium to large size buildings located nearby or far-away. And a software design from communication protocol to application program handles large amount of events efficiently to show information on a large LCD. A PC-based alarm system provides higher speed and larger capacity in a large LCD screen compared with foreign microprocessor-based small screen systems. Thus, very large buildings with several thousands of analog detectors can be easily covered in a single system. When an alarm occurs, a staff alarm scenario specially attempted only in the system is considered to play a major role to distinguish a real fire from unwanted alarms.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.10a
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• pp.175-179
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• 2010

본 논문에서는 주소형화재감지기의 필요성을 확인하고자 기존 일반형감지기의 회로분석 및 문제점을 통해 한계성을 분석하여, 화재 및 비화재보시 자동화재탐지설비의 성능향상을 위해 일반형감지기에 주소기능을 부여한 주소발생 및 주소수신모듈을 설계 제작하였고, 작동테스트를 통해 주소형감지기의 필요성을 알리고자 한다.