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出願の表示

1. CN101836244 - Fire alarm system

官庁 中華人民共和国
出願番号 200880113407.8
出願日 21.10.2008
公開番号 101836244
公開日 15.09.2010
特許番号 101836244
特許付与日 23.05.2012
公報種別 B
IPC
G08B 17/10
G物理学
08信号
B信号または呼出し装置;指令発信装置;警報装置
17火災警報;爆発に応答する警報
10煙またはガスの存在によって動作するもの
G01N 29/00
G物理学
01測定;試験
N材料の化学的または物理的性質の決定による材料の調査または分析
29超音波,音波または亜音波の使用による材料の調査または分析;超音波または音波を物体内に伝播させることによる物体内部の可視化
G01N 29/02
G物理学
01測定;試験
N材料の化学的または物理的性質の決定による材料の調査または分析
29超音波,音波または亜音波の使用による材料の調査または分析;超音波または音波を物体内に伝播させることによる物体内部の可視化
02流体の分析
CPC
G08B 17/10
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17Fire alarms; Alarms responsive to explosion
10Actuation by presence of smoke or gases ; automatic alarm devices for analysing flowing fluid materials by the use of optical means
G01N 29/032
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
02Analysing fluids
032by measuring attenuation of acoustic waves
G01N 29/348
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
34Generating the ultrasonic, sonic or infrasonic waves ; , e.g. electronic circuits specially adapted therefor
348with frequency characteristics, e.g. single frequency signals, chirp signals
G01N 29/4427
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
44Processing the detected response signal ; , e.g. electronic circuits specially adapted therefor
4409by comparison
4427with stored values, e.g. threshold values
G01N 2291/0217
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
02Indexing codes associated with the analysed material
021Gases
0217Smoke, combustion gases
G01N 2291/045
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
04Wave modes and trajectories
045External reflections, e.g. on reflectors
出願人 Panasonic Elec Works Co., Ltd.
松下电器产业株式会社
発明者 Watabe Yoshifumi
渡部祥文
Honda Yoshiaki
本多由明
Hayashi Masanori
林雅则
Takada Yuji
高田裕司
Nishikawa Takayuki
西川尚之
代理人 di wankui
北京市柳沈律师事务所 11105
発明の名称
(EN) Fire alarm system
(ZH) 火灾警报系统
要約
(EN)
In a fire alarm system for judging the occurrence of a fire by ultrasound, a sound wave generating means and a sound wave detecting means are disposed so as to detect sound waves traveling through two propagation paths with different path lengths. The system comprises a sound pressure ratio calculating means for calculating a sound pressure ratio that is the ratio between a first detected sound pressure that is the sound pressure of the sound wave propagating through the first propagation path and a second detected sound pressure that is the sound pressure of the sound wave propagating through the second propagation path and a smoke density estimating means. The smoke density estimating means obtains the rate of change between the sound pressure ratio calculated by the sound pressure ratio calculating means and a predetermined standard sound pressure ratio and determines the smoke density from the rate of change in accordance with a preset relational expression representing the relation between the rate of change and the smoke density. The fire is judged to have occurred when the smoke density exceeds a predetermined threshold value.

(ZH)

在利用超声波确定火灾的存在性的火灾警报系统中,声波生成部件和声波检测部件被配置为检测沿着具有不同路径长度的两个传播路径而行进的声波。所述系统包括:声压比计算部件,用于计算第一检测声压和第二检测声压之间的声压比,其中第一检测声压是经过第一传播路径传播的声波的声压,第二检测声压是经过第二传播路径传播的声波的声压;以及烟浓度估计部件。所述烟浓度估计器获得由所述声压比计算部件计算的声压比与预定的标准声压比之间的变化率,并根据表示所述变化率与烟浓度之间的关系的预设的关系表达式,由所述变化率确定烟浓度。当所述烟浓度超过预定的阈值时确定火灾已发生。