JP2009205583A - Home fire alarm - Google Patents

Home fire alarm Download PDF

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Publication number
JP2009205583A
JP2009205583A JP2008049274A JP2008049274A JP2009205583A JP 2009205583 A JP2009205583 A JP 2009205583A JP 2008049274 A JP2008049274 A JP 2008049274A JP 2008049274 A JP2008049274 A JP 2008049274A JP 2009205583 A JP2009205583 A JP 2009205583A
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Japan
Prior art keywords
battery
fire alarm
voltage
light
battery voltage
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JP2008049274A
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Japanese (ja)
Inventor
Kazuhiko Takahara
和彦 高原
Masahiro Ono
眞裕 大野
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Aiphone Co Ltd
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Aiphone Co Ltd
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Priority to JP2008049274A priority Critical patent/JP2009205583A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a home fire alarm for performing normal operation even when a battery exchange is needed by boosting battery voltage when the battery voltage drops. <P>SOLUTION: In the home fire alarm for sensing a home fire, a fire alarm is provided with a light emission configuration part for irradiating smoke with light, a light receiving configuration part for receiving light scattered by the smoke, a battery for driving the home fire alarm, and a CPU for controlling the home fire alarm. The light emission configuration part is provided with a light emission part for emitting a light emission element, a voltage monitoring part for detecting battery voltage supplied by the battery, and a voltage boosting part for boosting battery voltage when the battery voltage drops. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、住宅火災警報器の電池電圧が低下し電池寿命が短くなった時でも正常に動作させることができる住宅火災警報器に関する。 The present invention relates to a residential fire alarm that can be operated normally even when the battery voltage of the residential fire alarm is lowered and the battery life is shortened.

従来から、住宅火災感知器は煙等の火災要因を検知する検出する手段がとられており、その検知手段で検知された検出値が所定の閾値を超えた場合に火災を判断して、警報音による音響鳴動によって警報を行うものとして知られている。
これらの機器には電池で駆動されており、電池電圧が低下し電池寿命が短くなった時にでも動作できるように、ブザー等を鳴らすことで交換時期を知らせる機能を有している。
特開平5−92892
Conventionally, residential fire detectors have been used to detect fire factors such as smoke, and if the detection value detected by the detection means exceeds a predetermined threshold, a fire is judged and an alarm is issued. It is known to give an alarm by sounding sound.
These devices are driven by a battery and have a function of notifying the replacement time by sounding a buzzer or the like so that it can operate even when the battery voltage drops and the battery life is shortened.
JP-A-5-92892

しかしながら、電池の交換時期を知らせている状況下で煙を感知した場合、電池電圧の低下により正常に警報動作できない状況となる虞がある。 However, if smoke is detected in a situation where the battery replacement time is informed, there is a risk that the alarm operation cannot be performed normally due to a decrease in battery voltage.

そこで、本発明は、電池電圧が低下した時に電池電圧を昇圧させることで、電池の交換時期となった場合でも正常な動作を行うことができる住宅火災警報器を提供する。 Therefore, the present invention provides a residential fire alarm that can perform normal operation even when the battery replacement time is reached by boosting the battery voltage when the battery voltage drops.

前述の目的を達成するため、住宅火災の火災を感知する住宅火災警報器において、火災警報器には、煙に光を照射させる発光構成部と、煙によって散乱された光を受光する受光構成部と、住宅火災警報器を駆動する電池と、住宅火災警報器を制御するCPUを備えており、発光構成部には、発光素子を発光させる発光部と、電池から供給される電池電圧を検出する電圧監視部と、電池電圧が低下した時に電池電圧を昇圧させるための昇圧部を備えたことを特徴とする。 In order to achieve the above-mentioned object, in a house fire alarm that detects a fire of a house fire, the fire alarm includes a light emitting component that emits light to smoke and a light receiving component that receives light scattered by the smoke. And a battery for driving the house fire alarm, and a CPU for controlling the house fire alarm. The light emitting component detects a light emitting unit that emits light from the light emitting element and a battery voltage supplied from the battery. A voltage monitoring unit and a boosting unit for boosting the battery voltage when the battery voltage drops are provided.

本発明の火災警報器によれば、電池寿命が短くなった時にでも、正常な警報発報を行うことができる。 According to the fire alarm device of the present invention, a normal alarm can be issued even when the battery life is shortened.

以下、本発明の住宅火災警報器を適用した好ましい形態の実施例について図面を参照して説明する。 Hereinafter, preferred embodiments of a residential fire alarm device of the present invention will be described with reference to the drawings.

図1には、住宅火災警報器のブロック図を示している。
本発明の住宅火災警報器1は、住宅火災警報器1の内部に侵入した煙に向かって光を照射させるための発光構成部10と、煙によって散乱された光を受光するための受光構成部20と、住宅火災警報器1を駆動するための電池40と、住宅火災警報器1を制御するためのCPU30を備えている。
FIG. 1 shows a block diagram of a residential fire alarm.
The house fire alarm 1 of the present invention includes a light emitting component 10 for irradiating light toward the smoke that has entered the house fire alarm 1, and a light receiving component for receiving light scattered by the smoke. 20, a battery 40 for driving the house fire alarm 1, and a CPU 30 for controlling the house fire alarm 1.

図2は発光構成部のブロック図を示している。
発光構成部10は、発光素子によって構成された発光部104と、電池電圧の低下を監視する電圧監視部101と、電圧監視部101で電池電圧が所定一以下と判定された場合に、電池電圧を昇圧させる昇圧部102と、発光部104に一定の電流を供給するための定電流源部105とで構成されている。
FIG. 2 shows a block diagram of the light emitting component.
The light emission configuration unit 10 includes a light emission unit 104 configured by a light emitting element, a voltage monitoring unit 101 that monitors a decrease in battery voltage, and a battery voltage when the voltage monitoring unit 101 determines that the battery voltage is equal to or less than a predetermined value. And a constant current source unit 105 for supplying a constant current to the light emitting unit 104.

電圧監視部101は、抵抗R1、R2で構成され、昇圧部102は、抵抗R3、R4、R5、R6、ダイオードD1、トランジスタTr1、コンデンサC1、C2から構成され、定電流源部105は、トランジスタTr2、Tr3と抵抗R7で構成される。 The voltage monitoring unit 101 includes resistors R1 and R2, the boosting unit 102 includes resistors R3, R4, R5, and R6, a diode D1, a transistor Tr1, and capacitors C1 and C2. The constant current source unit 105 includes a transistor It consists of Tr2, Tr3 and resistor R7.

次に住宅火災警報器1の接続関係を説明する。電池40の陽極は、抵抗R1、R3の一端に接続され、抵抗R1の他の一端には、CPU30、抵抗R2の一端に接続される。抵抗R3の一端からは、抵抗R4、コンデンサC1の陽極と、ダイオードD1のアノード、トランジスタTr1のエミッタに接続される。抵抗R4のその他の一端には、抵抗R5の一端、トランジスタTr1のベースに接続され、抵抗R5のその他の一端はCPU30に接続される。トランジスタTr1のコレクタは、抵抗R6の一端、コンデンサC2の陰極に接続され、コンデンサC2の陽極は、ダイオードD1のカソード、発光部104に接続される。また、発光部104のその他の一端は、トランジスタTr2のコレクタに接続される。CPU30は、トランジスタTr2のベース、Tr3のコレクタに接続され、トランジスタTr2のエミッタは、トランジスタTr3のベース、抵抗7の一端に接続される。電池40の陰極、トランジスタTr3のエミッタ、抵抗R2、R6、R7のその他の一端は、GNDに接続される。 Next, the connection relation of the house fire alarm 1 will be described. The anode of the battery 40 is connected to one end of the resistors R1 and R3, and the other end of the resistor R1 is connected to one end of the CPU 30 and the resistor R2. One end of the resistor R3 is connected to the resistor R4, the anode of the capacitor C1, the anode of the diode D1, and the emitter of the transistor Tr1. The other end of the resistor R4 is connected to one end of the resistor R5 and the base of the transistor Tr1, and the other end of the resistor R5 is connected to the CPU 30. The collector of the transistor Tr1 is connected to one end of the resistor R6 and the cathode of the capacitor C2, and the anode of the capacitor C2 is connected to the cathode of the diode D1 and the light emitting unit 104. The other end of the light emitting unit 104 is connected to the collector of the transistor Tr2. The CPU 30 is connected to the base of the transistor Tr2 and the collector of the Tr3, and the emitter of the transistor Tr2 is connected to the base of the transistor Tr3 and one end of the resistor 7. The cathode of the battery 40, the emitter of the transistor Tr3, and the other ends of the resistors R2, R6, and R7 are connected to GND.

次に、住宅火災警報器の電池電圧が正常値の時の動作説明を行う。
電池40の電池電圧が正常である場合、電圧監視部101の抵抗R2の両端電圧を検出して、電池40が正常電圧と判断され、CPU30から抵抗R5へ、LOWレベルの昇圧信号S1を出力する。すると、電池40から抵抗R3、R4、R5を介して電池電圧が供給される。予め、抵抗R3、R4、R5は、昇圧信号S1がLOWレベルの時に、抵抗R4の両端電圧が0.7V以下となるよう設計が成されている。従って、抵抗R4の両端電圧が0.7V以下であるため、トランジスタTr1がOFF状態となる。すると、電池40からの電源は、抵抗R3、ダイオードD1を介して発光部104に供給される。また、発光部104を間欠点灯させるために、CPU30から定電流源部105のトランジスタTr2のベースにパルス状の駆動信号S2を出力している。
Next, the operation when the battery voltage of the house fire alarm is a normal value will be described.
When the battery voltage of the battery 40 is normal, the voltage across the resistor R2 of the voltage monitoring unit 101 is detected, the battery 40 is determined to be normal voltage, and the LOW level boost signal S1 is output from the CPU 30 to the resistor R5. . Then, the battery voltage is supplied from the battery 40 via the resistors R3, R4, and R5. The resistors R3, R4, and R5 are designed in advance so that the voltage across the resistor R4 is 0.7 V or less when the boost signal S1 is at the LOW level. Therefore, since the voltage across the resistor R4 is 0.7V or less, the transistor Tr1 is turned off. Then, the power from the battery 40 is supplied to the light emitting unit 104 via the resistor R3 and the diode D1. Further, in order to intermittently light the light emitting unit 104, the CPU 30 outputs a pulsed drive signal S2 to the base of the transistor Tr2 of the constant current source unit 105.

ここで、定電流源部105の動作説明を行う。駆動信号S2のパルス信号がHIGHレベルの時には、トランジスタTr2のベース‐エミッタ間が0.7V以上となるため、ON状態となる。すると、抵抗R7の両端電圧が0.7V以上となり、トランジスタTr3がON状態となる。このとき、トランジスタTr3がON状態となることによって、トランジスタTr2のベース‐エミッタ間が0.7V以下となり、トランジスタTr2がOFF状態になろうとする。すると、抵抗R7の両端電圧が0.7以下となり、トランジスタTr3がOFF状態になろうとする。このような動作が繰り返され最終的に、抵抗R7の両端電圧0.7Vの状態でトランジスタTr2,Tr3が安定状態となる。従って、抵抗R7の両端電圧が0.7Vと一定となり、R7に流れる電流、つまり発光部104に流れる電流も一定となる。よって、発光部104にて一定の光量で発光させることができる。駆動信号S2がLOWレベルの時には、トランジスタTr2のベース‐エミッタ間が0.7V以下、つまりOFF状態となるため、発光部104は消灯される。従って、パルス状の駆動信号S2によって、発光部104は間欠発光動作を繰り返すこととなる。 Here, the operation of the constant current source unit 105 will be described. When the pulse signal of the drive signal S2 is at a HIGH level, the voltage between the base and the emitter of the transistor Tr2 is 0.7 V or more, so that it is turned on. Then, the voltage across the resistor R7 becomes 0.7V or higher, and the transistor Tr3 is turned on. At this time, when the transistor Tr3 is turned on, the voltage between the base and the emitter of the transistor Tr2 becomes 0.7 V or less, and the transistor Tr2 tends to be turned off. Then, the voltage across the resistor R7 becomes 0.7 or less, and the transistor Tr3 tends to be turned off. Such an operation is repeated, and finally the transistors Tr2 and Tr3 are in a stable state with the voltage across the resistor R7 being 0.7V. Therefore, the voltage across the resistor R7 is constant at 0.7V, and the current flowing through R7, that is, the current flowing through the light emitting unit 104 is also constant. Therefore, the light emitting unit 104 can emit light with a certain amount of light. When the drive signal S2 is at the LOW level, the voltage between the base and the emitter of the transistor Tr2 is 0.7 V or less, that is, the OFF state, so the light emitting unit 104 is turned off. Therefore, the light emitting unit 104 repeats the intermittent light emission operation by the pulsed drive signal S2.

次に住宅火災警報器の電池電圧が低下した時の動作説明を行う。
電池40の電圧が低下した場合、電圧監視部101の抵抗R2の両端電圧を検知して、電池40の寿命が短いと判断され、CPU30から抵抗R5へ昇圧信号S1、駆動信号S2と逆相のパルス信号を出力する。つまり、昇圧信号S1がHIGHレベルの時に駆動信号S2はLOWレベル、昇圧信号S1がLOWレベルの時に駆動信号S2はHIGHレベルの信号となる。CPU30から抵抗R5への昇圧信号S1がHIGHレベルであった場合は、電池電圧が正常値の時と同様の動作となり、パルス状の駆動信号S2の信号によって発光部104が間欠発光動作を行う。CPU30から抵抗R5への昇圧信号S1がLOWレベルであった場合は、電池40から抵抗R3、R4、R5を介して電池電圧が供給される。予め、抵抗R3、R4、R5は、昇圧信号S1がHIGHレベルの時に、抵抗R4の両端電圧が0.7V以上となるように設計が成されている。従って、抵抗R4の両端電圧が0.7V以上であるため、トランジスタTr1がON状態となる。すると、電池40からの電源は、抵抗R3、トランジスタTr1、コンデンサC2を介して、発光部104に供給される。このとき、昇圧信号S1がLOWレベルの時に蓄えられていたコンデンサC2の電荷が放電されるため、発光部104への供給電圧は電池電圧の2倍となる。
従って、CPU30からの昇圧信号S1、駆動信号S2によって、昇圧部102からの出力電圧が電池電圧の2倍の時、発光部104を発光動作させ、昇圧部102からの出力電圧が電池電圧の時、発光部104を消灯動作させることができる。
Next, the operation when the battery voltage of the house fire alarm is lowered will be described.
When the voltage of the battery 40 decreases, the voltage across the resistor R2 of the voltage monitoring unit 101 is detected and it is determined that the life of the battery 40 is short, and the CPU 30 sends the voltage R1 to the resistor R5 in a phase opposite to that of the boost signal S1 and the drive signal S2. Outputs a pulse signal. That is, when the boost signal S1 is at a HIGH level, the drive signal S2 is a LOW level, and when the boost signal S1 is at a LOW level, the drive signal S2 is a HIGH level signal. When the step-up signal S1 from the CPU 30 to the resistor R5 is at a HIGH level, the operation is the same as when the battery voltage is a normal value, and the light emitting unit 104 performs an intermittent light emission operation by the pulsed drive signal S2. When the boost signal S1 from the CPU 30 to the resistor R5 is at the LOW level, the battery voltage is supplied from the battery 40 via the resistors R3, R4, and R5. The resistors R3, R4, and R5 are designed in advance so that the voltage across the resistor R4 is 0.7 V or higher when the boost signal S1 is at the HIGH level. Therefore, since the voltage across the resistor R4 is 0.7V or more, the transistor Tr1 is turned on. Then, the power from the battery 40 is supplied to the light emitting unit 104 via the resistor R3, the transistor Tr1, and the capacitor C2. At this time, since the charge of the capacitor C2 stored when the boost signal S1 is at the LOW level is discharged, the supply voltage to the light emitting unit 104 becomes twice the battery voltage.
Accordingly, when the output voltage from the booster 102 is twice the battery voltage by the boost signal S1 and the drive signal S2 from the CPU 30, the light-emitting unit 104 is caused to emit light, and when the output voltage from the booster 102 is the battery voltage. The light emitting unit 104 can be turned off.

また、昇圧信号S1がHIGHレベルとなった時、居住者に電池寿命が短くなったことを知らせるようにしても良い。 Further, when the boost signal S1 becomes HIGH level, the resident may be informed that the battery life has been shortened.

本発明の実施例による住宅火災警報器の具体的な構成を示すブロック図。The block diagram which shows the specific structure of the house fire alarm by the Example of this invention. 本発明の実施例による住宅火災警報器の発光構成部の具体的なブロック図。The specific block diagram of the light emission structure part of the house fire alarm by the Example of this invention.

符号の説明Explanation of symbols

10 発光構成部
101 電圧監視部
102 昇圧部
104 発光部
20 受光構成部
30 CPU
40 電池
DESCRIPTION OF SYMBOLS 10 Light emission structure part 101 Voltage monitoring part 102 Boosting part 104 Light emission part 20 Light reception structure part 30 CPU
40 batteries

Claims (1)

住宅火災の火災を感知する住宅火災警報器において、
前記火災警報器には、煙に光を照射させる発光構成部(10)と、煙によって散乱された光を受光する受光構成部(20)と、前記住宅火災警報器を駆動する電池(40)と、前記住宅火災警報器を制御するCPU(30)を備えており、
前記発光構成部には、発光素子を発光させる発光部(104)と、前記電池から供給される電池電圧を検出する電圧監視部(101)と、前記電池電圧が低下した時に前記電池電圧を昇圧させるための昇圧部(102)を備えたことを特徴とする住宅火災警報器。
In house fire alarms that detect house fires,
The fire alarm includes a light emitting component (10) for irradiating the smoke with light, a light receiving component (20) for receiving light scattered by the smoke, and a battery (40) for driving the residential fire alarm. And a CPU (30) for controlling the residential fire alarm,
The light emitting component includes a light emitting unit (104) that emits light from a light emitting element, a voltage monitoring unit (101) that detects a battery voltage supplied from the battery, and boosts the battery voltage when the battery voltage decreases. A house fire alarm characterized by comprising a booster (102) for causing the fire.
JP2008049274A 2008-02-29 2008-02-29 Home fire alarm Pending JP2009205583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008049274A JP2009205583A (en) 2008-02-29 2008-02-29 Home fire alarm

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JP2008049274A JP2009205583A (en) 2008-02-29 2008-02-29 Home fire alarm

Publications (1)

Publication Number Publication Date
JP2009205583A true JP2009205583A (en) 2009-09-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008049274A Pending JP2009205583A (en) 2008-02-29 2008-02-29 Home fire alarm

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012105520A1 (en) * 2011-02-04 2012-08-09 富士電機株式会社 Battery-powered alarm

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012105520A1 (en) * 2011-02-04 2012-08-09 富士電機株式会社 Battery-powered alarm
JPWO2012105520A1 (en) * 2011-02-04 2014-07-03 富士電機株式会社 Battery-powered alarm
JP5608761B2 (en) * 2011-02-04 2014-10-15 富士電機株式会社 Battery-powered alarm
TWI475518B (en) * 2011-02-04 2015-03-01 Fuji Electric Co Ltd Battery alarm

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