JP2009059137A - Alarm - Google Patents
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- JP2009059137A JP2009059137A JP2007225221A JP2007225221A JP2009059137A JP 2009059137 A JP2009059137 A JP 2009059137A JP 2007225221 A JP2007225221 A JP 2007225221A JP 2007225221 A JP2007225221 A JP 2007225221A JP 2009059137 A JP2009059137 A JP 2009059137A
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- 239000000779 smoke Substances 0.000 claims description 29
- 239000013078 crystal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 208000032041 Hearing impaired Diseases 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 208000016354 hearing loss disease Diseases 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
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Abstract
Description
本発明は、圧電ブザーを広い周波数帯で鳴動させることにより、誰でも聞き取りやすいブザー音を実現することのできる警報器に関するものである。 The present invention relates to an alarm device capable of realizing a buzzer sound that anyone can easily hear by ringing a piezoelectric buzzer in a wide frequency band.
警告時、非常時等にブザーを鳴動させ、使用者等に警報する警報器が知られている。ブザーとして圧電ブザー(圧電振動子)が用いられることがある。
この種警報器は、例えば、火災発生時の煙感知器や熱感知器、防犯ブザー等に用いられており、異常の検知又は使用者の操作等により、ブザー音等によって警報を発する。鳴動する圧電ブザーの音量を調節した警報器として、特許文献１では、圧電ブザーに供給する電圧を増加させており、圧電ブザーのブザー音を鳴動開始時から徐々に大きくするようにしている。
There is known an alarm device that sounds a buzzer at a warning or in an emergency to warn a user or the like. A piezoelectric buzzer (piezoelectric vibrator) may be used as the buzzer.
This type of alarm device is used, for example, in a smoke detector, a heat detector, a security buzzer, etc. in the event of a fire, and emits an alarm by a buzzer sound or the like upon detection of an abnormality or user operation. As an alarm device that adjusts the volume of the piezoelectric buzzer that rings, in Patent Document 1, the voltage supplied to the piezoelectric buzzer is increased, and the buzzer sound of the piezoelectric buzzer is gradually increased from the start of ringing.
上記のように、従来は、圧電ブザーのブザー音を大きくすることで、誰でも聞き取りやすいように警報を調節していたが、高齢者や聴覚障害者では、高い周波数帯域の音を聞き取りにくい傾向にあり、例え、ブザー音が大きくても、その鳴動周波数が、高周波数帯域であれば、聞き取ることは困難である。
一方、聴覚正常者では、低い周波数帯域の音よりも、高い周波数帯域の音の方が、警報音として捉えやすい傾向にある。
As mentioned above, by adjusting the buzzer sound of the piezoelectric buzzer to make it easier for anyone to hear, the alarm has been adjusted in the past. However, elderly people and people with hearing impairments are less likely to hear high-frequency sound. For example, even if the buzzer sound is loud, it is difficult to hear if the ringing frequency is a high frequency band.
On the other hand, a normal hearing person tends to catch a high frequency band sound as an alarm sound rather than a low frequency band sound.
また、図６は、一般的な圧電ブザーの鳴動周波数と音圧特性の関係を示すグラフである。図に示すように、圧電ブザーでは、電圧の周波数がズレると、急激に音圧が低下することがある。従って、一定周波数の電圧を供給した場合、製品のバラツキ等により、音量が十分に確保できないことがあった。 FIG. 6 is a graph showing the relationship between the ringing frequency and sound pressure characteristics of a general piezoelectric buzzer. As shown in the figure, in the piezoelectric buzzer, when the frequency of the voltage is shifted, the sound pressure may be rapidly decreased. Therefore, when a voltage having a constant frequency is supplied, the sound volume may not be sufficiently secured due to product variations.
本発明の目的は、圧電ブザーを広い周波数帯で鳴動させることにより、誰でも聞き取りやすいブザー音を実現することのできる警報器を提供することにある。 An object of the present invention is to provide an alarm device capable of realizing a buzzer sound that anyone can easily hear by ringing a piezoelectric buzzer in a wide frequency band.
上記課題を解決するために本発明の警報器は、
圧電ブザーと、
該圧電ブザーを制御する警報回路と、
該警報回路の動作を制御する制御手段と、を具えた警報器において、
制御手段は、警報回路を介して圧電ブザーに出力する電圧の周波数を変化させることで、圧電ブザーの鳴動周波数を変化させるようにした。
In order to solve the above problems, the alarm device of the present invention is
A piezoelectric buzzer,
An alarm circuit for controlling the piezoelectric buzzer;
A control means for controlling the operation of the alarm circuit, and an alarm device comprising:
The control means is configured to change the ringing frequency of the piezoelectric buzzer by changing the frequency of the voltage output to the piezoelectric buzzer via the alarm circuit.
本発明によれば、圧電ブザーに出力する電圧の周波数を変化させることにより、圧電ブザーの鳴動周波数を低周波数から高周波数まで変化させることができ、聴覚正常者のみならず、高齢者や聴覚障害者にも聞き取りやすい警報音を発する警報器を提供できる。 According to the present invention, by changing the frequency of the voltage output to the piezoelectric buzzer, the ringing frequency of the piezoelectric buzzer can be changed from a low frequency to a high frequency. It is possible to provide an alarm device that emits an audible alarm sound that is easy to hear.
一般に、人間の聴覚に一番敏感な周波数は３〜４ｋＨｚであり、聴覚正常者が最も聞き取りやすい周波数は４ｋＨｚである。一方、高齢者においては、聞き取りやすい周波数は２.５ｋＨｚ程度であり、聴覚正常者よりも低い周波数帯域となっている(例えば、「ＪＩＳ Ｓ ００１３：高齢者・障害者配慮設計指針−消費生活製品の報知音解説」参照)。 In general, the frequency that is most sensitive to human hearing is 3 to 4 kHz, and the frequency that a normal hearing person can easily hear is 4 kHz. On the other hand, for elderly people, the frequency that is easy to hear is about 2.5 kHz, which is a frequency band lower than that of normal hearing people (for example, “JIS S 0013: Elderly / disabled person-friendly design guidelines—consumer products). (See the description of the alarm sound of).
そこで、本発明では、圧電ブザーの鳴動周波数をこれら周波数帯域が含まれる音域で変化させるようにしている。具体的には、以下で説明するように２.５〜５.５ｋＨｚの帯域を例示できるが、これよりも広い周波数帯域又は狭い周波数帯域とすることも勿論可能である。 Therefore, in the present invention, the ringing frequency of the piezoelectric buzzer is changed in a sound range including these frequency bands. Specifically, as described below, a band of 2.5 to 5.5 kHz can be exemplified, but it is of course possible to use a wider frequency band or a narrower frequency band.
以下、本発明の警報器を光電式煙感知器(10)に適用した実施例について説明する。
図１は、本発明の光電式煙感知器(10)の一実施例を示すブロック図、図２は、光電式煙感知器(10)の外観を示す側面図である。
光電式煙感知器(10)は、図２に示す外周ケーシング(12)の内部に、図１に示すように、制御手段(40)、発光手段(20)、受光手段(30)、電源回路(54)、警報回路(42)、クリスタル回路(44)、電池切れ検出回路(56)、制御手段リセット回路(46)、外部スイッチ(60)、移報回路(48)、ヒューズ回路(52)及び電池(50)を具える。これら回路等は、光電式煙感知器(10)の内部に配備された基板(図示せず)上に形成又は基板に接続される。
Hereinafter, an embodiment in which the alarm device of the present invention is applied to a photoelectric smoke detector (10) will be described.
FIG. 1 is a block diagram showing an embodiment of the photoelectric smoke detector (10) of the present invention, and FIG. 2 is a side view showing the appearance of the photoelectric smoke detector (10).
As shown in FIG. 1, the photoelectric smoke detector (10) has a control means (40), a light emitting means (20), a light receiving means (30), a power supply circuit in the outer casing (12) shown in FIG. (54), alarm circuit (42), crystal circuit (44), battery exhaustion detection circuit (56), control means reset circuit (46), external switch (60), transfer circuit (48), fuse circuit (52) And with battery (50). These circuits and the like are formed on or connected to a substrate (not shown) provided inside the photoelectric smoke detector (10).
発光手段(20)は、発光素子(22)と該発光素子(22)を発光駆動させる発光制御回路(24)とを具える。
発光素子(22)は、光電式煙感知器(10)のケーシング(12)の内部に形成された監視空間(14)に配置される。監視空間(14)は、所謂ラビリンス等によって外部からの光が遮蔽されるが、空気は侵入可能な空間である。
発光素子(22)として、赤外線発光ダイオードを例示できる。
The light emitting means (20) includes a light emitting element (22) and a light emission control circuit (24) for driving the light emitting element (22) to emit light.
The light emitting element (22) is disposed in a monitoring space (14) formed inside the casing (12) of the photoelectric smoke detector (10). The surveillance space (14) is a space in which light from the outside is shielded by a so-called labyrinth or the like, but air can enter.
An example of the light emitting element (22) is an infrared light emitting diode.
受光手段(30)は、受光素子(32)と、該受光素子(32)の出力を制御手段(40)に送信する受光制御回路(34)とを有する。受光制御回路(34)には、図２に示すように、増幅回路(36)を有し、該増幅回路(36)によって、受光素子(32)の出力は増幅されて、制御手段(40)に送信される。
受光素子(32)として、フォトダイオード、フォトＩＣ、太陽電池、ＣｄＳ素子を例示でき、受光素子(32)は、発光素子(22)からの放射光を直接受光しないが、監視空間(14)に煙が侵入したときに、放射光の散乱光を受光可能となるように監視空間(14)に配置される。
The light receiving means (30) includes a light receiving element (32) and a light receiving control circuit (34) for transmitting the output of the light receiving element (32) to the control means (40). As shown in FIG. 2, the light receiving control circuit (34) has an amplifying circuit (36), and the output of the light receiving element (32) is amplified by the amplifying circuit (36) to control means (40). Sent to.
Examples of the light receiving element (32) include a photodiode, a photo IC, a solar cell, and a CdS element. The light receiving element (32) does not directly receive the radiated light from the light emitting element (22). When smoke enters, it is arranged in the monitoring space (14) so that it can receive scattered light of the emitted light.
警報回路(42)は、警報音を発する手段としての圧電ブザー(43)と、警報を光で報知する発光装置(図示せず)を具え、制御手段(40)から信号を受けて、煙(火災)の発生を音と光で報知する。圧電ブザー(43)はケーシング(12)の内部に配備され、発光装置は、ケーシング(12)の一部に設けられた透過性の窓(13)から視認可能となるように配備される。 The alarm circuit (42) includes a piezoelectric buzzer (43) as a means for emitting an alarm sound, and a light emitting device (not shown) for notifying the alarm by light, receives a signal from the control means (40), and smoke ( The occurrence of fire) is notified by sound and light. The piezoelectric buzzer (43) is provided inside the casing (12), and the light emitting device is provided so as to be visible from a transmissive window (13) provided in a part of the casing (12).
警報回路(42)は、制御手段(40)からの信号を受けて、圧電ブザー(43)に電力を供給し、圧電ブザー(43)を鳴動させる。
図３は、警報回路(42)の回路図である。警報回路(42)は、ＦＥＴ Ｑ１、抵抗Ｒ１〜Ｒ３、ダイオードＤ１、インダクタＬ１及び圧電ブザーＢＺ(43)を図３に示すように接続して構成される。
警報回路(42)は、制御手段(40)より任意の周波数でＦＥＴ Ｑ１のオン、オフ切替えを行ない、並列に接続された昇圧コイルＬ１で昇圧することにより、大音量のブザー音を実現している。また、昇圧時のリンキングの発生を抑えるため、昇圧コイルＬ１にダイオードＤ１を直列に接続している。さらに、高電圧からＦＥＴを保護するため、コンデンサＣ１と抵抗Ｒ３でスナバ回路を形成している。
なお、警報回路(42)及び圧電ブザー(43)の鳴動については後述する。
The alarm circuit (42) receives a signal from the control means (40), supplies power to the piezoelectric buzzer (43), and sounds the piezoelectric buzzer (43).
FIG. 3 is a circuit diagram of the alarm circuit (42). The alarm circuit (42) is configured by connecting an FET Q1, resistors R1 to R3, a diode D1, an inductor L1, and a piezoelectric buzzer BZ (43) as shown in FIG.
The alarm circuit (42) switches the FET Q1 on and off at an arbitrary frequency from the control means (40), and boosts the voltage with a booster coil L1 connected in parallel to realize a loud buzzer sound. Yes. Further, a diode D1 is connected in series with the booster coil L1 in order to suppress the occurrence of linking during boosting. Furthermore, in order to protect the FET from high voltage, a snubber circuit is formed by the capacitor C1 and the resistor R3.
The sounding of the alarm circuit (42) and the piezoelectric buzzer (43) will be described later.
電池(50)は、光電式煙感知器(10)に電源を供給する。また、電源回路(54)は、所定電圧を発光手段(20)及び受光手段(30)に供給する。
電池(50)は、一次電池や二次電池を用いることができる。これら電池と併せて、太陽電池(51)を用いることもできる。この場合、太陽電池(51)は、図２に示すように、光電式煙感知器(10)のケーシング(12)の外周に取り付けることが望ましい。また、太陽電池(51)は、設置場所における照明や外乱光を効率的に受けるために、ケーシング(12)の側面の複数箇所に取り付けることが望ましい。
光電式煙感知器(10)の非作動時の消費電力が６μＡ程度である場合、面積約４００ｍｍ2程度の太陽電池(51)を併用することで、光電式煙感知器(10)にて１０年間で消費される電力の約４０％を太陽電池(51)によって補うことができ、電池(50)の長寿命化を達成でき、また、一次電池や二次電池に安価な低容量の電池を採用できる利点がある。
The battery (50) supplies power to the photoelectric smoke detector (10). The power supply circuit (54) supplies a predetermined voltage to the light emitting means (20) and the light receiving means (30).
As the battery (50), a primary battery or a secondary battery can be used. In combination with these batteries, a solar battery (51) can also be used. In this case, the solar cell (51) is preferably attached to the outer periphery of the casing (12) of the photoelectric smoke detector (10) as shown in FIG. Further, the solar cell (51) is preferably attached to a plurality of locations on the side surface of the casing (12) in order to efficiently receive illumination and disturbance light at the installation location.
If the photoelectric smoke detector (10) consumes about 6μA when it is not in operation, it can be combined with a solar cell (51) with an area of about 400mm 2 to produce 10 photoelectric smoke detector (10). Approximately 40% of the power consumed annually can be supplemented by solar cells (51), which can extend the life of batteries (50), and provide low-cost, low-capacity batteries for primary and secondary batteries. There is an advantage that can be adopted.
クリスタル回路(44)は、所定周期毎に制御手段(40)に信号を送信し、該信号に基づいて、制御手段(40)は、発光手段(20)に発光動作を生じせしめると共に、受光手段(30)のサンプリングを行なう。
また、クリスタル回路(44)は、警報回路(42)の作動時間、作動間隔を制御する。
The crystal circuit (44) transmits a signal to the control means (40) at predetermined intervals, and on the basis of the signal, the control means (40) causes the light emitting means (20) to emit light and receives the light receiving means. Sampling of (30) is performed.
The crystal circuit (44) controls the operation time and operation interval of the alarm circuit (42).
外部スイッチ(60)は、警報の停止及び光電式煙感知器(10)が正常に機能しているかどうかを試験するスイッチである。外部スイッチ(60)の操作ボタン(15)は、図２に示すようにケーシング(12)に配備される。
警報作動時に操作ボタン(15)を使用者が操作することで、外部スイッチ(60)が作動すると、制御手段(40)は、一定の時間圧電ブザー(43)のみ、又は、発光装置のみを停止させる。
警報非作動時に、外部スイッチ(60)が操作されると、光電式煙感知器(10)の動作試験を行なうことができる。具体的には、発光手段(20)及び受光手段(30)等が正常に機能しているか、又、圧電ブザー(43)及び／又は発光装置による報知が正常に行なわれるかどうかが確認される。
The external switch (60) is a switch for testing whether the alarm is stopped and whether the photoelectric smoke detector (10) is functioning normally. The operation button (15) of the external switch (60) is provided on the casing (12) as shown in FIG.
When the external switch (60) is activated by the user operating the operation button (15) when the alarm is activated, the control means (40) stops only the piezoelectric buzzer (43) or only the light emitting device for a certain period of time. Let
If the external switch (60) is operated when the alarm is not activated, the operation test of the photoelectric smoke detector (10) can be performed. Specifically, it is confirmed whether the light emitting means (20), the light receiving means (30), etc. are functioning normally, and whether the notification by the piezoelectric buzzer (43) and / or the light emitting device is normally performed. .
移報回路(48)は、煙を検出した場合や、光電式煙感知器(10)に異常や故障が生じた場合に、外部に具えられた外付け警報装置の発光装置や発音装置を発光、鳴動させる等により、使用者に火災を報知したり、光電式煙感知器(10)の点検を促す。 The transfer circuit (48) emits a light emitting device or sounding device of an external alarm device provided externally when smoke is detected or when an abnormality or failure occurs in the photoelectric smoke detector (10). The user is informed of a fire or urged to check the photoelectric smoke detector (10) by making it ring.
制御手段リセット回路(46)は、上述のとおり、警報回路(42)やクリスタル回路(44)のカウント等のリセットを行なう。 As described above, the control means reset circuit (46) resets the count of the alarm circuit (42) and the crystal circuit (44).
電池切れ検出回路(56)は、電池(50)の残量を検知し、電池(50)が消耗したことを検知すると、例えば、警報回路(42)の発光装置を点灯、点滅させることで使用者に光電式煙感知器(10)の点検を促す。 The battery exhaustion detection circuit (56) detects the remaining amount of the battery (50), and when it detects that the battery (50) is depleted, it can be used, for example, by turning on or flashing the light emitting device of the alarm circuit (42). Urge the person to check the photoelectric smoke detector (10).
ヒューズ回路(52)は、電池(50)から供給される過電圧から光電式煙感知器(10)を保護する。 The fuse circuit (52) protects the photoelectric smoke detector (10) from an overvoltage supplied from the battery (50).
上記構成の光電式煙感知器(10)において、通常作動時、即ち、煙が監視空間(14)に侵入していない場合には、クリスタル回路(44)からの信号に基づいて、所定時間毎(例えば、約１０秒間隔)に発光手段(20)が発光素子(22)を発光させる。このとき、発光素子(22)の放射光は、受光素子(32)には検知されないから、受光素子(32)の出力はゼロ又は極めて低い値となる。 In the photoelectric smoke detector (10) configured as described above, during normal operation, i.e., when smoke does not enter the monitoring space (14), based on the signal from the crystal circuit (44), every predetermined time. The light emitting means (20) causes the light emitting element (22) to emit light (for example, at intervals of about 10 seconds). At this time, since the light emitted from the light emitting element (22) is not detected by the light receiving element (32), the output of the light receiving element (32) becomes zero or an extremely low value.
火災等の発生により、煙が監視空間(14)に侵入した状態で、制御手段(40)からの信号に基づいて発光素子(22)が発光すると、その放射光が煙の微粒子によって乱反射し、散乱光が受光素子(32)にて受光される。受光素子(32)の出力は増幅され、制御手段(40)に送信される。受光素子(32)の出力(増幅値)が所定の閾値を越えていると判断されると、制御手段(40)は、警報回路(42)に信号を送信し、圧電ブザー(43)及び発光装置を作動させ、音と光によって警報を行なう。圧電ブザー(43)は、以下の要領で作動する。 When the light emitting element (22) emits light based on a signal from the control means (40) in a state where smoke has entered the monitoring space (14) due to the occurrence of a fire or the like, the emitted light is irregularly reflected by the fine particles of smoke, Scattered light is received by the light receiving element (32). The output of the light receiving element (32) is amplified and transmitted to the control means (40). When it is determined that the output (amplification value) of the light receiving element (32) exceeds a predetermined threshold, the control means (40) transmits a signal to the alarm circuit (42), and the piezoelectric buzzer (43) and the light emission Activate the device and give an alarm by sound and light. The piezoelectric buzzer (43) operates as follows.
受光素子(32)の出力が所定の閾値を越えると、制御手段(40)は、警報回路(42)にＦＥＴ Ｑ１をオン、オフする周波数を階段状に制御する信号を送信し、図４に示すように、圧電ブザー(43)の鳴動周波数を２.５ｋＨｚから５.５ｋＨｚまで階段状に増加するように調節する。図示の例では、０.５秒毎に０.５秒間鳴動するようにしている。 When the output of the light receiving element (32) exceeds a predetermined threshold, the control means (40) transmits a signal for controlling the frequency at which the FET Q1 is turned on and off in a stepwise manner to the alarm circuit (42). As shown, the ringing frequency of the piezoelectric buzzer (43) is adjusted to increase stepwise from 2.5 kHz to 5.5 kHz. In the example shown in the figure, the sound is generated for 0.5 seconds every 0.5 seconds.
図４では、圧電ブザー(43)の鳴動周波数を、最初は低周波数(２.５ｋＨｚ)、その後、徐々に高くして、最終的に高周波数(５.５ｋＨｚ)で鳴動するようにしている。このように圧電ブザー(43)の鳴動周波数を調節することで、高齢者や聴覚障害者でも警報音が聞き取りやすく、また、聴覚健常者もブザー音を警報音として認識しやすくすることができる。
圧電ブザー(43)は、鳴動を低周波数から開始させることが望ましい。高齢者や聴覚障害者への警報を先んじるためである。
In FIG. 4, the ringing frequency of the piezoelectric buzzer (43) is initially lowered at a low frequency (2.5 kHz) and then gradually increased to finally ring at a high frequency (5.5 kHz). By adjusting the ringing frequency of the piezoelectric buzzer (43) in this way, it is easy for elderly people and hearing-impaired people to hear the alarm sound, and also for a normal hearing person, the buzzer sound can be easily recognized as the alarm sound.
The piezoelectric buzzer (43) preferably starts ringing from a low frequency. This is in order to alert the elderly and hearing impaired.
警報が作動している状態で、外部スイッチ(60)を操作すると、上記のとおり、圧電ブザー(43)及び発光装置による警報が一定の時間停止させられる。 When the external switch (60) is operated while the alarm is activated, the alarm by the piezoelectric buzzer (43) and the light emitting device is stopped for a certain period of time as described above.
なお、図４では、段階的に鳴動周波数を変化させているが、図５に示すように、直線的に変化させることも勿論可能である。 In FIG. 4, the ringing frequency is changed step by step, but it is of course possible to change it linearly as shown in FIG.
上記では、本発明の警報器を光電式煙感知器に適用した実施例について説明したが、本発明は、熱感知器、防犯ブザー等の警報音を発する装置に広く適用することができる。 In the above description, the embodiment in which the alarm device of the present invention is applied to the photoelectric smoke detector has been described. However, the present invention can be widely applied to devices that emit an alarm sound such as a heat sensor and a security buzzer.
本発明は、圧電ブザーを広い周波数帯で鳴動させることにより、誰でも聞き取りやすいブザー音を実現することのできる警報器として有用である。 INDUSTRIAL APPLICATION This invention is useful as an alarm device which can implement | achieve a buzzer sound which anyone can hear easily by ringing a piezoelectric buzzer in a wide frequency band.
(10) 光電式煙感知器
(20) 発光手段
(30) 受光手段
(40) 制御手段
(42) 警報回路
(43) 圧電ブザー
(10) Photoelectric smoke detector
(20) Light emission means
(30) Light receiving means
(40) Control means
(42) Alarm circuit
(43) Piezoelectric buzzer
Claims (4)
該圧電ブザーを制御する警報回路と、
該警報回路の動作を制御する制御手段と、を具えた警報器において、
制御手段は、警報回路を介して圧電ブザーに出力する電圧の周波数を変化させることで、圧電ブザーの鳴動周波数を変化させるようにしたことを特徴とする警報器。 A piezoelectric buzzer,
An alarm circuit for controlling the piezoelectric buzzer;
A control means for controlling the operation of the alarm circuit, and an alarm device comprising:
An alarm device characterized in that the control means changes the ringing frequency of the piezoelectric buzzer by changing the frequency of the voltage output to the piezoelectric buzzer via the alarm circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007225221A JP2009059137A (en) | 2007-08-31 | 2007-08-31 | Alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007225221A JP2009059137A (en) | 2007-08-31 | 2007-08-31 | Alarm |
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| Publication Number | Publication Date |
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| JP2009059137A true JP2009059137A (en) | 2009-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2007225221A Withdrawn JP2009059137A (en) | 2007-08-31 | 2007-08-31 | Alarm |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157145A (en) * | 2010-01-29 | 2011-08-17 | 能美防灾株式会社 | Audible alarm device and fire alarm system including the same |
| JP2013257846A (en) * | 2012-06-14 | 2013-12-26 | New Cosmos Electric Corp | Method for setting frequency output characteristic of alarm tone |
| JP2017004101A (en) * | 2015-06-05 | 2017-01-05 | 富士通株式会社 | Fire detection device, fire detection system, fire detection method, and fire detection program |
-
2007
- 2007-08-31 JP JP2007225221A patent/JP2009059137A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157145A (en) * | 2010-01-29 | 2011-08-17 | 能美防灾株式会社 | Audible alarm device and fire alarm system including the same |
| EP2362379A1 (en) | 2010-01-29 | 2011-08-31 | Nohmi Bosai Ltd. | Audible alarm device and fire alarm system including the same |
| CN102157145B (en) * | 2010-01-29 | 2014-05-07 | 能美防灾株式会社 | Audible alarm device and fire alarm system including the same |
| JP2013257846A (en) * | 2012-06-14 | 2013-12-26 | New Cosmos Electric Corp | Method for setting frequency output characteristic of alarm tone |
| JP2017004101A (en) * | 2015-06-05 | 2017-01-05 | 富士通株式会社 | Fire detection device, fire detection system, fire detection method, and fire detection program |
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