JPS6231861Y2 - - Google Patents
Info
- Publication number
- JPS6231861Y2 JPS6231861Y2 JP13500480U JP13500480U JPS6231861Y2 JP S6231861 Y2 JPS6231861 Y2 JP S6231861Y2 JP 13500480 U JP13500480 U JP 13500480U JP 13500480 U JP13500480 U JP 13500480U JP S6231861 Y2 JPS6231861 Y2 JP S6231861Y2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- load resistor
- ultraviolet
- detection tube
- 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.)
- Expired
Links
- 238000000825 ultraviolet detection Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Emergency Alarm Devices (AREA)
Description
【考案の詳細な説明】
（利用分野）
本考案は火災の炎を検出する炎検出装置に関す
る。[Detailed Description of the Invention] (Field of Application) The present invention relates to a flame detection device for detecting the flame of a fire.
（従来技術の問題点）
一般にこの種炎検出装置は、第２図に示す如
く、直流電源イの電圧を電圧変換回路ロにて昇圧
して紫外線検出管ハに印加し、炎の紫外線が紫外
線検出管ハに入射すると放電を起し負荷抵抗ニに
出力電圧を発生させこの出力電圧を検知回路ホに
入力して信号処理しスイツチング回路ヘをスイツ
チング動作させて警報装置トを動作させると共に
紫外線検出管ハに並列接続したスイツチチの操作
にて紫外線検出管ハの放電状態を模擬的に負荷抵
抗ニに発生させ動作試験を行うものがあつた。(Problems with the prior art) In general, this type of flame detection device, as shown in Fig. 2, boosts the voltage of a DC power supply A with a voltage conversion circuit B and applies it to an ultraviolet detection tube C. When it enters the detection tube C, it causes a discharge and generates an output voltage across the load resistor D. This output voltage is input to the detection circuit E, which processes the signal and operates the switching circuit to operate the alarm device G and detect ultraviolet rays. There was one in which an operation test was conducted by simulating the discharge state of the ultraviolet detection tube C on the load resistor by operating a switch connected in parallel with the tube C.
而して上記の如きものであると、スイツチチの
操作にて動作試験を行うことは出来るが回路状態
の試験であり紫外線検出管ハが放電を起し負荷抵
抗ニに電圧が発生して警報装置トが動作するか否
かは確認出来ず、従つて紫外線検出管を含めた全
体的な試験を行うことは出来ないので信頼性に欠
けていた。 In the case of the above, although it is possible to perform an operation test by operating a switch, it is only a test of the circuit condition, and the ultraviolet detector tube causes discharge, voltage is generated across the load resistor, and the alarm device is activated. It was not possible to confirm whether the UV detector was working or not, and therefore it was not possible to perform a comprehensive test including the UV detector tube, resulting in a lack of reliability.
（本考案の目的）
本考案は上記の様な点に鑑み、スイツチの操作
にて紫外線検出管に負荷抵抗を介して紫外線検出
管の放電開始電圧以上の電圧を印加することによ
り、紫外線検出管の放電を含めて動作試験が行
え、動作試験の信頼性を向上させることを目的と
したものである。(Purpose of the present invention) In view of the above points, the present invention has been developed to apply a voltage higher than the discharge starting voltage of the ultraviolet detection tube to the ultraviolet detection tube via a load resistor by operating a switch. The purpose of this test is to improve the reliability of operation tests by allowing operation tests to be performed, including discharges.
（実施例）
以下本考案を一実施例として掲げた図面第１図
に基づいて説明すると、１は直流電源、２は直流
電源１に入力を並列接続した電圧変換回路であつ
て、直流電源１の電圧を昇圧する。３は限流用抵
抗、４は対向した陽極４ａと陰極４ｂとを紫外線
透過率のよい紫外線透過ガラス或は石英ガラス等
にて封入した紫外線検出管、５は負荷抵抗であつ
て、電圧変換回路２の出力に限流用抵抗３と紫外
線検出管４の陽極４ａ及び陰極４ｂと負荷抵抗５
との直列回路を並列接続する。而して電圧変換回
路２の出力電圧は紫外線検出管４の放電開始電圧
以下の電圧であり、紫外線が入射されると、電極
４ａ，４ｂ間にタウンゼント領域にて放電が起り
負荷抵抗５にパルス電圧が出力される。６は検知
回路であつて、負荷抵抗５に発生したパルス出力
電圧を入力し第１のパルス電圧と第１のパルス電
圧の次に出力された第２のパルス電圧との間の時
間が所定値内の際に信号を出力する。７はトラン
ジスタのスイツチング回路８はブザー或はベル等
の警報装置であつて、検知回路６の出力信号にて
スイツチング回路７がスイツチング動作し警報装
置８に直流電源１より電流を流し警報音を発す
る。即ち、検知回路６とスイツチング回路７と警
報装置８とで負荷抵抗５に発生する出力電圧を信
号処理し警報音を発生する検出回路９を構成す
る。而して火災が発生すると、炎の紫外線の紫外
線検出管４に入射して放電を起し負荷抵抗５にパ
ルス電圧を出力して検知回路６に入力し信号処理
してスイツチング回路７を動作させて警報装置８
を動作させるのである。１０は高圧発生回路であ
つて、スイツチ１１の操作にて紫外線検出管５に
負荷抵抗５を介して紫外線検出管５の放電開始電
圧以上の電圧を印加する。即ち、電圧変換回路２
の出力に限流用抵抗３を介して充電抵抗１２と放
電抵抗１３との直流回路を並列接続し、この放電
抵抗１３にコンデンサ１４とトリガ変圧器１５の
一次巻線との直列回路とサイリスタ１６のアノー
ド及びカソードとを並列接続し、さらにサイリス
タ１６のゲートを直流電源１にスイツチ１１を介
して並列接続した分圧抵抗１７，１８の分圧点に
接続し、而もトリガ変圧器１５の二次巻線を逆流
防止用ダイオード１９を介して紫外線検出管４と
負荷抵抗５との直列回路に接続しており、常時は
電圧変換回路２の出力より充電抵抗１２を介して
コンデンサ１４が充電されている。而してスイツ
チ１１を操作し閉極することにより分圧抵抗１
７，１８の分圧点に電圧が発生してサイリスタ１
６がスイツチング動作し、コンデンサ１４の充電
電荷がサイリスタ１６のアノード及びカソードと
トリガ変圧器１５の一次巻線とを介して放電しト
リガ変圧器１５の二次巻線に紫外線検出管４の放
電開始電圧以上の電圧を発生し紫外線検出管４と
負荷抵抗５との直列回路に印加するのである。２
０は限流用抵抗３と紫外線検出管４との直列回路
の間に接続した逆流防止用ダイオードである。(Embodiment) The present invention will be explained below based on FIG. 1, which shows an embodiment of the present invention. 1 is a DC power supply, 2 is a voltage conversion circuit whose input is connected in parallel to the DC power supply 1, boost the voltage. 3 is a current limiting resistor; 4 is an ultraviolet detection tube in which an anode 4a and a cathode 4b facing each other are sealed with ultraviolet transmitting glass or quartz glass having good ultraviolet transmittance; 5 is a load resistor; Current limiting resistor 3, anode 4a and cathode 4b of ultraviolet detection tube 4, and load resistor 5 are connected to the output of
Connect the series circuits in parallel. Therefore, the output voltage of the voltage conversion circuit 2 is a voltage lower than the discharge starting voltage of the ultraviolet detection tube 4, and when ultraviolet rays are incident, discharge occurs in the Townsend area between the electrodes 4a and 4b, and a pulse is generated in the load resistor 5. Voltage is output. 6 is a detection circuit which inputs the pulse output voltage generated in the load resistor 5 and determines the time between the first pulse voltage and the second pulse voltage outputted next to the first pulse voltage to a predetermined value. Outputs a signal when inside. 7 is a transistor switching circuit 8 is an alarm device such as a buzzer or a bell, and the switching circuit 7 performs a switching operation in response to the output signal of the detection circuit 6, causing current to flow from the DC power supply 1 to the alarm device 8 and emitting an alarm sound. . That is, the detection circuit 6, the switching circuit 7, and the alarm device 8 constitute a detection circuit 9 that processes the output voltage generated at the load resistor 5 and generates an alarm sound. When a fire occurs, the ultraviolet rays from the flames enter the ultraviolet detection tube 4 and cause a discharge, which outputs a pulse voltage to the load resistor 5 and inputs it to the detection circuit 6, which processes the signal and operates the switching circuit 7. alarm device 8
It operates. Reference numeral 10 denotes a high voltage generating circuit, which applies a voltage higher than the discharge starting voltage of the ultraviolet detection tube 5 to the ultraviolet detection tube 5 via the load resistor 5 by operating a switch 11. That is, voltage conversion circuit 2
A DC circuit of a charging resistor 12 and a discharging resistor 13 is connected in parallel to the output of the current limiting resistor 3, and a series circuit of a capacitor 14 and a primary winding of a trigger transformer 15 and a thyristor 16 are connected to the output of the discharging resistor 13 in parallel. The anode and cathode are connected in parallel, and the gate of the thyristor 16 is connected to the voltage dividing point of voltage dividing resistors 17 and 18 connected in parallel to the DC power supply 1 via the switch 11. The winding is connected to a series circuit of the ultraviolet detection tube 4 and the load resistor 5 via a backflow prevention diode 19, and the capacitor 14 is normally charged from the output of the voltage conversion circuit 2 via the charging resistor 12. There is. Then, by operating the switch 11 and closing the voltage dividing resistor 1.
Voltage is generated at the voltage dividing points 7 and 18, and thyristor 1
6 performs a switching operation, and the charge in the capacitor 14 is discharged through the anode and cathode of the thyristor 16 and the primary winding of the trigger transformer 15, and the discharge of the ultraviolet detection tube 4 begins in the secondary winding of the trigger transformer 15. A voltage higher than the voltage is generated and applied to the series circuit of the ultraviolet detection tube 4 and the load resistor 5. 2
0 is a backflow prevention diode connected between the series circuit of the current limiting resistor 3 and the ultraviolet detection tube 4.
（効果）
かように本考案は、スイツチの操作にて紫外線
検出管に負荷抵抗を介して紫外線検出管の放電開
始電圧以上の電圧を印加する高圧発生回路を設け
たので、スイツチの操作にて紫外線検出管に放電
が起り負荷抵抗に電圧が発生するから、紫外線検
出管の放電を含めた動作試験が行え動作試験の信
頼性を向上させることが出来る効果がある。(Effects) As described above, the present invention is equipped with a high voltage generation circuit that applies a voltage higher than the discharge starting voltage of the ultraviolet detection tube to the ultraviolet detection tube via the load resistor by operating the switch. Since a discharge occurs in the ultraviolet detection tube and a voltage is generated in the load resistor, an operation test including the discharge of the ultraviolet detection tube can be performed, which has the effect of improving the reliability of the operation test.
図面第１図は本考案の炎検出装置の一実施例を
示す回路図、第２図は従来の炎検出装置の回路図
である。
１……直流電源、２……電圧変換回路、４……
紫外線検出管、５……負荷抵抗、６……検知回
路、７……スイツチング回路、８……警報装置、
９……検出回路、１０……高圧発生回路、１１…
…スイツチ。
FIG. 1 is a circuit diagram showing an embodiment of the flame detection device of the present invention, and FIG. 2 is a circuit diagram of a conventional flame detection device. 1...DC power supply, 2...Voltage conversion circuit, 4...
Ultraviolet detection tube, 5...Load resistance, 6...Detection circuit, 7...Switching circuit, 8...Alarm device,
9...detection circuit, 10...high voltage generation circuit, 11...
...Switch.
Claims (1)
極と陰極との間に印加され炎の紫外線に応答して
放電を起す紫外線検出管と、前記負荷抵抗に発生
する電圧を検知回路にて信号処理しスイツチング
回路を介して警報装置を動作する検出回路と、ス
イツチの操作にて前記紫外線検出管に負荷抵抗を
介して前記紫外線検出管の放電開始電圧以上の電
圧を印加する高圧発生回路とでなる炎検出装置。 A voltage below the discharge starting voltage is applied between the anode and the cathode via a load resistor, and a UV detection tube generates a discharge in response to the ultraviolet rays of the flame, and the voltage generated across the load resistor is signal processed by a detection circuit. a detection circuit that operates an alarm device via a switching circuit; and a high voltage generation circuit that applies a voltage higher than the discharge starting voltage of the ultraviolet detection tube to the ultraviolet detection tube via a load resistor when the switch is operated. Flame detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13500480U JPS6231861Y2 (en) | 1980-09-22 | 1980-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13500480U JPS6231861Y2 (en) | 1980-09-22 | 1980-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5757370U JPS5757370U (en) | 1982-04-03 |
| JPS6231861Y2 true JPS6231861Y2 (en) | 1987-08-15 |
Family
ID=29495192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13500480U Expired JPS6231861Y2 (en) | 1980-09-22 | 1980-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6231861Y2 (en) |
-
1980
- 1980-09-22 JP JP13500480U patent/JPS6231861Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5757370U (en) | 1982-04-03 |
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