JPH087183A - Gas leakage alarming device - Google Patents

Gas leakage alarming device

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Publication number
JPH087183A
JPH087183A JP14157394A JP14157394A JPH087183A JP H087183 A JPH087183 A JP H087183A JP 14157394 A JP14157394 A JP 14157394A JP 14157394 A JP14157394 A JP 14157394A JP H087183 A JPH087183 A JP H087183A
Authority
JP
Japan
Prior art keywords
gas
signal
alarm
gas concentration
concentration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14157394A
Other languages
Japanese (ja)
Other versions
JP2666178B2 (en
Inventor
Ritsuo Hama
律雄 浜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOMITA DENKI KK
Tomita Electric Co Ltd
Original Assignee
TOMITA DENKI KK
Tomita Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TOMITA DENKI KK, Tomita Electric Co Ltd filed Critical TOMITA DENKI KK
Priority to JP6141573A priority Critical patent/JP2666178B2/en
Publication of JPH087183A publication Critical patent/JPH087183A/en
Application granted granted Critical
Publication of JP2666178B2 publication Critical patent/JP2666178B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Alarm Systems (AREA)

Abstract

PURPOSE:To inhibit the generation of an erroneous alarm for gas concentration for tentatively increasing concentration other than the gas of monitoring object and to automatically perform recovery even when the erroneous alarm is issued by any chance. CONSTITUTION:This device is provided with a gas concentration detection means 10 for changing a DC voltage corresponding to the concentration of the gas, a reference signal generation means 9 corresponding to the gas concentration of a prescribed value, a signal coincidence detection means 7 for checking the coincidence of gas concentration signals G and reference signals B, a time measurement means 7 for measuring the fixed period of time after the coincidence of both signals is detected, a signal size discrimination means 7 for checking the sizes of both signals G and B immediately after measuring the fixed period of time and discriminating the sizes, alarm generation means 30 and 31 for generating the alarm when the signal size discrimination means 7 judges that the gas concentration signals G are larger and further, an alarm stopping means 7 for automatically performing the recovery against the erroneous alarm at the time of judging that the concentration signals G are smaller.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、家庭の台所等に常設し
て使用されるガス漏れ警報装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leak alarm device which is permanently installed in a kitchen or the like at home.

【0002】[0002]

【従来の技術】従来のガス漏れ警報装置は、ガス検出セ
ンサが規定濃度値以上のガス濃度を検出すると、発音や
発光もしくは電気信号に基づいて、警報を発するように
なっている。
2. Description of the Related Art A conventional gas leak alarm device issues an alarm based on sound, light emission, or an electric signal when a gas detection sensor detects a gas concentration higher than a specified concentration value.

【0003】[0003]

【発明が解決しようとする課題】従来のガス漏れ警報器
は、本来警報を発するべき都市ガスやLPガス以外の、
殺虫剤、ヘヤースプレー、酒、調味料、煙等の有機体の
飛散、噴霧、揮発、蒸発による、一過性の雑ガスの濃度
を感知した際にも、警報を発してしまう。本発明は、こ
のような本来のガス以外によって発せられる警報を防止
することを目的としている。
A conventional gas leak alarm device is a gas leak alarm device other than city gas or LP gas, which should originally generate an alarm.
It also gives an alarm when it senses the concentration of transient miscellaneous gases due to the scattering, spraying, volatilization, or evaporation of organisms such as insecticides, hair spray, liquor, seasonings, and smoke. The present invention aims to prevent such alarms emitted by other than the original gas.

【0004】[0004]

【課題を解決するための手段】本発明によると、上記課
題は次のようにして解決される。
According to the present invention, the above problems can be solved as follows.

【0005】(1) 検出するべきガスの濃度に応じて直
流電圧を変化するガス濃度検出手段と、弁別するべきガ
スの濃度に応じた基準信号を発生する基準信号発生手段
と、ガス濃度検出手段からのガス濃度信号と、基準信号
発生手段からの基準信号との一致を調べる信号一致検出
手段と、信号一致手段が両信号の一致を検出してから、
一定時間の経過を計測する時間計測手段と、時間計測手
段による一定時間の計測直後に、ガス濃度信号と基準信
号の大きさを調べて、両信号の大小を判別する信号大小
判別手段と、信号大小判別手段がガス濃度信号を大と判
定したときに、警報を発生する警報発生手段とを備える
ことを特徴とする。
(1) Gas concentration detecting means for changing a DC voltage according to the concentration of gas to be detected, reference signal generating means for generating a reference signal according to the concentration of gas to be discriminated, and gas concentration detecting means After the gas concentration signal from the signal and the signal coincidence detecting means for checking the coincidence of the reference signal from the reference signal generating means and the signal coincidence means detect the coincidence of both signals,
A time measuring means for measuring the passage of a fixed time, and a signal magnitude discriminating means for discriminating the magnitude of both signals by examining the magnitudes of the gas concentration signal and the reference signal immediately after measuring the constant time by the time measuring means, and a signal. An alarm generation means is provided for generating an alarm when the size determination means determines that the gas concentration signal is high.

【0006】(2) 上記(1)項において、信号大小判別
手段がガス濃度信号を小と判定したときに、警報発生手
段が警報発生中であれば、警報を停止させる警報停止手
段を設ける。
(2) In the above item (1), an alarm stop means is provided for stopping the alarm if the alarm generation means is generating an alarm when the signal level determination means determines that the gas concentration signal is low.

【0007】[0007]

【作用】ガス濃度が所要の規定値に達したときから、一
定時間経過後に、その時点で検出されるガス濃度の大小
を、規定値と比較して、警報の発生を決定するため、一
過性のガス濃度変動に対する誤報の発生頻度は大幅に減
少する。
[Function] After a certain time has passed since the gas concentration reached the required specified value, the magnitude of the gas concentration detected at that time is compared with the specified value to determine the occurrence of an alarm. The frequency of false alarms due to changes in the gas concentration of sex is greatly reduced.

【0008】また、警報停止手段を設けておけば、一旦
ガス濃度が大と判定されて警報発生中に、ガス濃度と比
較基準値の一致が得られて、再判定の機会を生じた場合
には、一過性のガス濃度増加に対する誤報の自動リセッ
トが行われる。
If an alarm stopping means is provided, the gas concentration is once determined to be high, and during the generation of an alarm, a match between the gas concentration and the comparison reference value is obtained. Automatically resets false alarms for transient gas concentration increases.

【0009】[0009]

【実施例】図1は、本発明の一実施例を示すものであ
る。図1において(1)は、一般商用電源(2)に接続され
た1次巻線を備えるトランスで、2つある2次巻線(3)
(4)の中の一方(3)には、整流器(5)とコンデンサ(6)
が接続され、マイクロコンピュータを内蔵した制御回路
(7)のための直流電源(8)を生成する。
FIG. 1 shows an embodiment of the present invention. In FIG. 1, (1) is a transformer having a primary winding connected to a general commercial power supply (2), and there are two secondary windings (3).
One (3) of (4) has a rectifier (5) and a capacitor (6)
Control circuit with a built-in microcomputer
Generate a DC power supply (8) for (7).

【0010】他方の2次巻線(4)には、基準信号発生手
段(9)と、ガス濃度検出手段(10)とが並列的に接続さ
れ、両手段(9)(10)の信号取出し部分は、後述のように
平衡ブリッヂ回路を形成している。
A reference signal generating means (9) and a gas concentration detecting means (10) are connected in parallel to the other secondary winding (4) to take out signals from both means (9) and (10). The parts form a balanced bridge circuit as described below.

【0011】基準信号発生手段(9)は、可変感度を増大
するための直列抵抗(11)(12)を両端に備えた可変抵抗器
(13)の中央の摺動端子(14)に、出力される基準信号(B)
が正極性になるように、半波整流用のダイオード(15)を
出力電圧に直列に、かつ平滑コンデンサ(16)を出力電圧
に並列に接続して構成されている。
The reference signal generating means (9) is a variable resistor having series resistors (11) and (12) at both ends for increasing the variable sensitivity.
Reference signal (B) output to the sliding terminal (14) in the center of (13)
The diode (15) for half-wave rectification is connected in series with the output voltage, and the smoothing capacitor (16) is connected in parallel with the output voltage so that the voltage has a positive polarity.

【0012】ガス濃度検出手段(10)は、検出ガスに反応
して抵抗値を低下させるガス感知部(17)を上部(反接地
側)として、接地側に固定抵抗部(18)を直列接続し、そ
の中間接続部(10a)から、ガス濃度に対応した交流信号
を取り出し、その交流信号を半波整流用のダイオード(1
9)で整流するとともに、平滑コンデンサ(20)で平滑化し
て、直流のガス濃度信号(G)を得ている。
The gas concentration detecting means (10) has a gas sensing portion (17) which lowers a resistance value in response to a detected gas as an upper portion (anti-ground side) and a fixed resistance portion (18) connected in series to the ground side. Then, an AC signal corresponding to the gas concentration is extracted from the intermediate connection (10a), and the AC signal is converted to a diode (1) for half-wave rectification.
It is rectified by 9) and smoothed by a smoothing capacitor (20) to obtain a DC gas concentration signal (G).

【0013】基準信号発生手段(9)における可変抵抗器
(13)及び直列抵抗(11)(12)と、ガス濃度検出手段(10)に
おけるガス感知部(17)及び固定抵抗部(18)は、2次巻線
(4)の両端に接続されたブリッヂ回路を構成しており、
可変抵抗器(13)の摺動端子(14)と、ガス感知部(17)の下
端の中間接続部(11a)は、ブリッヂ回路の平衡電圧出力
端になっている。
Variable resistor in the reference signal generating means (9)
(13) and the series resistances (11) and (12), and the gas sensing section (17) and the fixed resistance section (18) in the gas concentration detecting means (10) are secondary windings.
A bridge circuit connected to both ends of (4),
The sliding terminal (14) of the variable resistor (13) and the intermediate connecting part (11a) at the lower end of the gas sensing part (17) are the balanced voltage output end of the bridge circuit.

【0014】基準信号(B)とガス濃度信号(G)は、前記
制御回路(7)の入力ポート(21)(22)に接続されている。
入力ポート(21)(22)に入力する基準信号(B)とガス濃度
信号(G)は、制御回路(7)において、その一致を調べら
れたり、大小が比較されたりする。
The reference signal (B) and the gas concentration signal (G) are connected to the input ports (21) and (22) of the control circuit (7).
The control circuit (7) checks whether the reference signal (B) and the gas concentration signal (G) input to the input ports (21) and (22) match each other or compares them in magnitude.

【0015】この入力ポート(21)(22)部分における両信
号(B)(G)は、2次巻線(4)の両端を交流電圧源とする
ブリッジ回路の平衡電圧出力端から、それぞれダイオー
ド(15)(19)を介して整流された信号であるから、交流電
圧の変動分に対しては、相対値として無視できる程度
に、ブリッジ回路の初期平衡を調整して得られる安定な
信号である。
Both signals (B) and (G) at the input ports (21) and (22) are diode-coupled from the balanced voltage output terminal of the bridge circuit using both ends of the secondary winding (4) as an AC voltage source. (15) Since it is a signal rectified via (19), it is a stable signal obtained by adjusting the initial balance of the bridge circuit to the extent that it can be ignored as a relative value for fluctuations in AC voltage. is there.

【0016】制御回路(7)は、前記直流電源(8)により
駆動され、図3に示すフローチャートに応じたプログラ
ムによってデジタル制御を行う、マイクロプロッセッサ
を備えるマイクロコンピュータにより構成されている。
The control circuit (7) is constituted by a microcomputer equipped with a microprocessor which is driven by the DC power source (8) and performs digital control by a program according to the flow chart shown in FIG.

【0017】制御回路(7)は、警報を発するときに、電
流を吸込むように制御される出力ポート(23)と、電流を
吐き出すように制御される出力ポート(24)を備え、出力
ポート(23)は、発光ダイオード(25)と限流抵抗(26)を直
列として、直流電源(8)に接続されている。
The control circuit (7) is provided with an output port (23) which is controlled to suck current and an output port (24) which is controlled to discharge current when an alarm is issued. ) Is connected to the DC power supply (8) with the light emitting diode (25) and the current limiting resistance (26) in series.

【0018】出力ポート(24)は、直流電源(8)に接続さ
れている発音用圧電素子(27)と、トランジスタ(28)との
直列回路におけるトランジスタ(28)のベース端子(28a)
に接続されている。
The output port (24) is a base terminal (28a) of the transistor (28) in a series circuit of the sound producing piezoelectric element (27) connected to the DC power source (8) and the transistor (28).
It is connected to the.

【0019】制御回路(7)が警報を発するときは、発光
ダイオード(25)に電流を流して、発光ダイオード(25)を
発光させ、またトランジスタ(28)のベース端子(28a)
に、所要繰り返し周波数のパルス列を印加して、発音用
の圧電素子(27)を所要の周波数で発音させるように、制
御回路(7)はそれらを制御する。
When the control circuit (7) issues an alarm, a current is passed through the light emitting diode (25) to cause the light emitting diode (25) to emit light, and the base terminal (28a) of the transistor (28).
Then, the control circuit (7) controls them so that the piezoelectric element (27) for sounding is sounded at the required frequency by applying the pulse train of the required repeating frequency.

【0020】発音用圧電素子(27)には、過電圧保護用の
抵抗器(29)が並列に、また、トランジスタ(28)のベース
端子(28a)には、限流抵抗(28b)が接続されている。
A resistor (29) for overvoltage protection is connected in parallel to the sounding piezoelectric element (27), and a current limiting resistor (28b) is connected to the base terminal (28a) of the transistor (28). ing.

【0021】上記構成のガス漏れ警報装置は、図2のタ
イムチャートのように、図3のフローチャートに基づい
て、プログラム制御される。
The gas leak alarm device having the above configuration is program-controlled based on the flowchart of FIG. 3 as shown in the time chart of FIG.

【0022】図2の実線曲線及び太点線は、ガス感知部
(17)の近傍のガス濃度に応じたガス濃度信号(G)を示
し、同図の細点線は、弁別を要するガス濃度に応じた基
準信号(B)を示している。
The solid curve and the thick dotted line in FIG. 2 are the gas sensor.
The gas concentration signal (G) corresponding to the gas concentration in the vicinity of (17) is shown, and the thin dotted line in the figure shows the reference signal (B) corresponding to the gas concentration requiring discrimination.

【0023】プログラム制御は、図3に示す如く、ステ
ップ(S1)において、ガス濃度信号(G)が基準信号(B)
に等しくなったことを検出すると、予め定められた時間
(T)を計数する時間計測手段の計時を、ステップ(S2)
で開始する。
In the program control, as shown in FIG. 3, in step (S1), the gas concentration signal (G) is changed to the reference signal (B).
Is detected for a predetermined time
Step (S2) is the time measurement of the time measuring means for counting (T).
Start with.

【0024】ステップ(S3)において、時間(T)秒に達
すると、次のステップ(S4)において、ガス濃度信号
(G)と基準信号(B)の大きさを比較し、もしガス濃度信
号(G)の方が大きければステップ(S5)に進み、トラン
ジスタ(28)と圧電素子(27)によるブザー回路(30)に、所
要周波数のパルス信号を送り、圧電素子(27)を発音させ
(ブザー回路(30)をONにする)、かつ発光ダイオード(2
5)と限流抵抗(26)によるLED回路(31)に電流を流し
て、発光ダイオード(25)を点灯し(LED回路(31)をO
Nにする)、その後ステップ(S1)に戻る。
When the time (T) seconds have been reached in step (S3), the gas concentration signal is output in the next step (S4).
(G) and the reference signal (B) are compared, and if the gas concentration signal (G) is larger, the process proceeds to step (S5), and the buzzer circuit (30) including the transistor (28) and the piezoelectric element (27) is used. ), Send a pulse signal of the required frequency to cause the piezoelectric element (27) to sound.
(Turn on the buzzer circuit (30)) and light-emitting diode (2
5) and a current limiting resistor (26) are used to pass a current through the LED circuit (31) to turn on the light emitting diode (25) (the LED circuit (31) is turned off.
(Set to N), and then return to step (S1).

【0025】ステップ(S4)において、もしガス濃度信
号(G)が基準信号(B)よりも小さいときには、ステップ
(S6)に進み、ブザー回路(30)及びLED回路(31)がO
Nであれば、両回路(30)(31)をOFFにして、ステップ
(S1)に戻る。ステップ(S1)においては、常時このステ
ップ(S1)を繰り返して、ガス濃度信号(G)と基準信号
(B)の一致を調べる。
In step (S4), if the gas concentration signal (G) is smaller than the reference signal (B),
Proceed to (S6) and the buzzer circuit (30) and LED circuit (31) are turned off.
If N, both circuits (30) and (31) are turned off and step
Return to (S1). In step (S1), this step (S1) is constantly repeated to obtain the gas concentration signal (G) and the reference signal.
Check the match of (B).

【0026】図2に示す本発明のガス漏れ警報装置の作
動状況は、次の如くである。
The operating condition of the gas leak alarm device of the present invention shown in FIG. 2 is as follows.

【0027】(イ)は、ガス濃度信号(G)の値が、基準信
号(B)より小さい値から漸増して、基準信号(B)の値と
交差する場合。
In the case (a), the value of the gas concentration signal (G) gradually increases from a value smaller than the reference signal (B) and crosses the value of the reference signal (B).

【0028】(ロ)は、ガス濃度信号(G)の値が、前記
(イ)の状況を過ぎた後も漸増状態を継続する場合。
(B) shows that the value of the gas concentration signal (G) is
In the case of continuing the gradual increase state after the situation of (a).

【0029】(ハ)は、ガス濃度信号(G)の値が、基準信
号(B)より大きい値から漸減して、基準信号(B)の値と
交差する場合。
In the case (c), the value of the gas concentration signal (G) gradually decreases from a value larger than the reference signal (B) and crosses the value of the reference signal (B).

【0030】(ニ)は、ガス濃度信号(G)の値が、基準信
号(B)より小さい値から漸増し、基準信号(B)を一旦越
えた後漸減して、ステップ(S2)の設定時間(T)秒以内
に基準信号(B)以下に戻った場合。
(D), the value of the gas concentration signal (G) gradually increases from a value smaller than the reference signal (B), gradually decreases after once exceeding the reference signal (B), and the step (S2) is set. When the signal returns below the reference signal (B) within the time (T) seconds.

【0031】前記(イ)の場合は、一過性のガスであって
も、実際のガス漏れであっても、この状況は一旦通過
し、所定の時間(T)の後に、圧電素子(27)のブザーが鳴
り、発光ダイオード(25)の警報灯が点灯する。
In the case of the above (a), this situation is once passed, whether it is a transient gas or an actual gas leak, and after a predetermined time (T), the piezoelectric element (27 ), The buzzer sounds, and the warning light of the light emitting diode (25) lights up.

【0032】前記(ロ)の場合は、(イ)の状況を通過した
後、ガス濃度が減少しない状況であるから、実際のガス
漏れ状況に合致し、圧電素子(27)のブザーが鳴り、発光
ダイオード(25)の警報灯が点灯した警報状態は持続す
る。
In the case of (b), since the gas concentration does not decrease after passing through the situation of (a), it matches the actual gas leakage situation and the buzzer of the piezoelectric element (27) sounds, The alarm condition in which the warning light of the light emitting diode (25) is lit continues.

【0033】前記(ハ)の場合は、一旦圧電素子(27)のブ
ザーが鳴り、発光ダイオード(25)の警報灯が点灯して、
警報状態になるが、その後、ガス濃度が減少して、設定
時間(T)の後には、ガス濃度が規定値以下に減少した状
況であり、この場合には、一過性のガス濃度増加状況と
して、警報状態を停止して通常状態に復旧する(自動的
にリセットする)。
In the case of (c), the buzzer of the piezoelectric element (27) sounds once, the warning light of the light emitting diode (25) lights up,
After the alarm state, the gas concentration decreased, and after the set time (T), the gas concentration decreased below the specified value. In this case, the gas concentration increased temporarily. As a result, the alarm state is stopped and the normal state is restored (it is automatically reset).

【0034】前記(ニ)の場合は、極少量の感応ガスが、
ガス感知部(17)の近傍に流れてきたような状況で、一過
性のガス濃度の増加とするよりは、測定の外乱、ノイ
ズ、過渡現象的な状況であって、設定時間(T)以内に生
じるガス濃度の瞬時的な規定値オーバに対して、警報状
態とすることなく、一過性の現象を無視する。
In the case of the above (d), a very small amount of the sensitive gas is
In the situation where the gas flows near the gas sensing unit (17), rather than a transient increase of the gas concentration, it is a situation of measurement disturbance, noise, or a transient phenomenon, and the set time (T) When the gas concentration exceeds the specified value instantaneously, the transient phenomenon is ignored without setting the alarm state.

【0035】[0035]

【発明の効果】本発明は、上記した構成であるので、以
下のような効果を奏しうる。
EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, the following effects can be obtained.

【0036】(a) 一時的に短時間、ガス濃度が予め定
めた規定値を越えても、警報を発しないので、一過性の
ガス濃度変動に対しては、誤報の発生頻度が大幅に減少
する。
(A) Even if the gas concentration exceeds a predetermined value temporarily for a short time, no alarm is issued. Decrease.

【0037】(b) ガス濃度が規定値を越えて一旦警報
を発しても、その後、ガス濃度が一定時間以内に規定値
より低下していると、自動的に警報を停止するので、一
過性のガス濃度増加に伴う誤報の自動リセットを行うこ
とができる(請求項2)。
(B) Even if an alarm is once issued when the gas concentration exceeds the specified value, the alarm is automatically stopped if the gas concentration falls below the specified value within a certain time. It is possible to automatically reset an erroneous alarm due to an increase in the concentration of the volatile gas (claim 2).

【0038】(c) 制御要素が、電圧値の単純な一致検
出と、電圧値の大小比較と、時間計数のみで構成されて
いるので、電子回路構成が簡単になり、かつプログラム
制御部分が簡単であるため、制御回路におけるマイクロ
コンピュータの部分が、最低機能のマイクロプロセッサ
を備えたIC素子で十分である。しかも、プログラムも
短く、データ量も極く少ないので、プログラムメモリ容
量の少ないIC素子で十分であり、安価に提供できる。
(C) Since the control elements are constituted only by simple coincidence detection of voltage values, comparison of voltage values, and time counting, the electronic circuit configuration is simplified and the program control portion is simplified. Therefore, for the microcomputer part in the control circuit, an IC element equipped with a microprocessor having the minimum function is sufficient. In addition, since the program is short and the amount of data is extremely small, an IC element having a small program memory capacity is sufficient and can be provided at low cost.

【0039】(d) 制御パラメータが、電圧と時間のみ
であるため、安価な電子回路部品により、十分な精度を
長期間得ることが容易である。しかも、調整や校正が容
易であるため、生産性の高い量産に適したガス漏れ警報
装置を提供できる。
(D) Since the control parameters are only voltage and time, it is easy to obtain sufficient accuracy for a long time with inexpensive electronic circuit components. Moreover, since adjustment and calibration are easy, a gas leak alarm device suitable for mass production with high productivity can be provided.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す電気回路図である。FIG. 1 is an electric circuit diagram showing an embodiment of the present invention.

【図2】本発明装置の動作要領を示すタイムチャートで
ある。
FIG. 2 is a time chart showing the operating procedure of the device of the present invention.

【図3】本発明装置における制御回路を動作するフロー
チャートである。
FIG. 3 is a flowchart for operating a control circuit in the device of the present invention.

【符号の説明】[Explanation of symbols]

(1)トランス (2)一般商用電源 (3)(4)2次巻線 (5)整流器 (6)コンデンサ (7)制御回路 (8)電源 (9)基準信号発生手段 (10)ガス濃度検出手段 (11a)中間接続部 (12)直列抵抗 (13)可変抵抗器 (14)摺動端子 (15)ダイオード (16)平滑コンデンサ (17)ガス感知部 (18)固定抵抗部 (19)ダイオード (20)平滑コンデンサ (21)(22)入力ポート (23)(24)出力ポート (25)発光ダイオード (26)限流抵抗 (27)発音用圧電素子 (28)トランジスタ (28a)ベース端子 (28b)限流抵抗 (29)抵抗器 (30)ブザー回路 (31)LED回路 (G)ガス濃度信号 (B)基準信号 (T)設定時間 (1) Transformer (2) General commercial power supply (3) (4) Secondary winding (5) Rectifier (6) Capacitor (7) Control circuit (8) Power supply (9) Reference signal generating means (10) Gas concentration detection Means (11a) Intermediate connection (12) Series resistance (13) Variable resistor (14) Sliding terminal (15) Diode (16) Smoothing capacitor (17) Gas detector (18) Fixed resistor (19) Diode ( 20) Smoothing capacitor (21) (22) Input port (23) (24) Output port (25) Light emitting diode (26) Current limiting resistor (27) Piezoelectric element (28) Transistor (28a) Base terminal (28b) Current limiting resistance (29) Resistor (30) Buzzer circuit (31) LED circuit (G) Gas concentration signal (B) Reference signal (T) Setting time

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成6年7月1日[Submission date] July 1, 1994

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0013[Correction target item name] 0013

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0013】基準信号発生手段(9)における可変抵抗器
(13)及び直列抵抗(11)(12)と、ガス濃度検出手段(10)に
おけるガス感知部(17)及び固定抵抗部(18)は、2次巻線
(4)の両端に接続されたブリッヂ回路を構成しており、
可変抵抗器(13)の摺動端子(14)と、ガス感知部(17)の下
端の中間接続部(10a)は、ブリッヂ回路の平衡電圧出力
端になっている。
Variable resistor in the reference signal generating means (9)
(13) and the series resistances (11) and (12), and the gas sensing section (17) and the fixed resistance section (18) in the gas concentration detecting means (10) are secondary windings.
A bridge circuit connected to both ends of (4),
The sliding terminal (14) of the variable resistor (13) and the intermediate connection part (10a) at the lower end of the gas sensing part (17) are balanced voltage output terminals of the bridge circuit.

【手続補正2】[Procedure Amendment 2]

【補正対象書類名】図面[Document name to be corrected] Drawing

【補正対象項目名】図1[Name of item to be corrected] Figure 1

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【図1】 FIG.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 検出するべきガスの濃度に応じて直流電
圧を変化するガス濃度検出手段と、 弁別するべきガスの濃度に応じた基準電圧を発生する基
準信号発生手段と、 ガス濃度検出手段からのガス濃度信号と、基準信号発生
手段からの基準信号との一致を調べる信号一致検出手段
と、 信号一致手段が両信号の一致を検出してから、一定時間
の経過を計測する時間計測手段と、 時間計測手段による一定時間の計測直後に、ガス濃度信
号と基準信号の大きさを調べて、両信号の大小を判別す
る信号大小判別手段と、 信号大小判別手段がガス濃度信号を大と判定したとき
に、警報を発生する警報発生手段とを備えることを特徴
とするガス漏れ警報装置。
1. A gas concentration detecting means for changing a DC voltage according to a concentration of a gas to be detected, a reference signal generating means for generating a reference voltage according to a concentration of a gas to be discriminated, and a gas concentration detecting means. A signal coincidence detecting means for checking the coincidence between the gas concentration signal of No. 1 and the reference signal from the reference signal generating means, and a time measuring means for measuring the passage of a fixed time after the signal coincidence means detects the coincidence of both signals. Immediately after measuring a certain period of time by the time measuring means, the magnitude of the gas concentration signal and the reference signal are checked, and the signal magnitude discriminating means that discriminates the magnitude of both signals, and the signal magnitude discriminating means determines the gas concentration signal as large A gas leak alarm device, comprising: an alarm generating means for generating an alarm when the gas leaks.
【請求項2】 信号大小判別手段がガス濃度信号を小と
判定したときに、警報発生手段が警報発生中であれば、
警報を停止させる警報停止手段を設けてなる請求項1記
載のガス漏れ警報装置。
2. When the signal generation discriminating means judges that the gas concentration signal is small and the alarm generating means is generating an alarm,
The gas leak alarm device according to claim 1, further comprising alarm stop means for stopping the alarm.
JP6141573A 1994-06-23 1994-06-23 Gas leak alarm method Expired - Lifetime JP2666178B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6141573A JP2666178B2 (en) 1994-06-23 1994-06-23 Gas leak alarm method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6141573A JP2666178B2 (en) 1994-06-23 1994-06-23 Gas leak alarm method

Publications (2)

Publication Number Publication Date
JPH087183A true JPH087183A (en) 1996-01-12
JP2666178B2 JP2666178B2 (en) 1997-10-22

Family

ID=15295126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6141573A Expired - Lifetime JP2666178B2 (en) 1994-06-23 1994-06-23 Gas leak alarm method

Country Status (1)

Country Link
JP (1) JP2666178B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008003831A (en) * 2006-06-22 2008-01-10 Yazaki Corp Gas alarm and gas alarming method
CN105243796A (en) * 2015-10-29 2016-01-13 桂林市腾瑞电子科技有限公司 Kitchen safety monitoring system
CN106355841A (en) * 2016-10-20 2017-01-25 广西大学 Gas leakage audible and visual alarm
JP2017049871A (en) * 2015-09-03 2017-03-09 矢崎エナジーシステム株式会社 Gas alarm unit and gas alarming method
JP2019071103A (en) * 2016-03-31 2019-05-09 綜合警備保障株式会社 Alarm device, alarm method, and program

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107698U (en) * 1979-01-25 1980-07-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107698U (en) * 1979-01-25 1980-07-28

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008003831A (en) * 2006-06-22 2008-01-10 Yazaki Corp Gas alarm and gas alarming method
JP2017049871A (en) * 2015-09-03 2017-03-09 矢崎エナジーシステム株式会社 Gas alarm unit and gas alarming method
CN105243796A (en) * 2015-10-29 2016-01-13 桂林市腾瑞电子科技有限公司 Kitchen safety monitoring system
JP2019071103A (en) * 2016-03-31 2019-05-09 綜合警備保障株式会社 Alarm device, alarm method, and program
CN106355841A (en) * 2016-10-20 2017-01-25 广西大学 Gas leakage audible and visual alarm

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Publication number Publication date
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