JPH04130058U - Transparent smoke meter - Google Patents
Transparent smoke meterInfo
- Publication number
- JPH04130058U JPH04130058U JP4557391U JP4557391U JPH04130058U JP H04130058 U JPH04130058 U JP H04130058U JP 4557391 U JP4557391 U JP 4557391U JP 4557391 U JP4557391 U JP 4557391U JP H04130058 U JPH04130058 U JP H04130058U
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- light receiving
- emitting element
- smoke
- 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.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 47
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 abstract description 12
- 239000007789 gas Substances 0.000 description 5
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
(57)【要約】
【目的】 黒煙のみならず白煙の濃度を周囲温度、電源
電圧等の変動があっても正確に測定する。
【構成】 発光素子１２から所定の間隔をあけて発光素
子１２に対向して第１受光素子２１が設けられ、発光素
子１２と第１受光素子２１との間に排煙１４が通過し、
第１受光素子２１が受けた光量に応じて排煙１４濃度を
測定する。第１受光素子２１に近接して設けられた第２
受光素子２２が発光素子１２の発した光を受けないよう
に暗箱１６に内蔵され、発光素子１２が発した光を排煙
１４内を通過させずに鏡１７を介して受ける位置に第３
受光素子２３が設けられ、第１受光素子２１の検出した
検出値が第２及び第３受光素子２２，２３の検出した検
出値により補正される。
(57) [Summary] [Purpose] Accurately measure the concentration of not only black smoke but also white smoke even when there are fluctuations in ambient temperature, power supply voltage, etc. [Structure] A first light receiving element 21 is provided facing the light emitting element 12 at a predetermined distance from the light emitting element 12, and exhaust smoke 14 passes between the light emitting element 12 and the first light receiving element 21.
The concentration of the flue gas 14 is measured according to the amount of light received by the first light receiving element 21. A second light receiving element provided close to the first light receiving element 21
The light receiving element 22 is housed in the dark box 16 so as not to receive the light emitted by the light emitting element 12, and a third light receiving element 22 is placed in a position where the light emitted by the light emitting element 12 is received via the mirror 17 without passing through the smoke exhaust 14.
A light receiving element 23 is provided, and the detection value detected by the first light receiving element 21 is corrected by the detection values detected by the second and third light receiving elements 22 and 23.
Description
【０００１】0001
本考案は排煙濃度を測定する光透過式スモークメータに関する。更に詳しくは ディーゼルエンジンから排出される白煙の濃度を測定するのに適した光透過式ス モークメータに関するものである。 The present invention relates to a light transmission type smoke meter for measuring exhaust gas concentration. For more details A light transmitting screen suitable for measuring the concentration of white smoke emitted from diesel engines. It is related to the Morchmeter.
【０００２】0002
従来、濃度のランクが２以上の排煙濃度の測定は目視により行われ、ディーゼ ル自動車から排出される黒煙のようにその濃度のランクが０から１までの範囲に ある排煙濃度の測定は反射式スモークメータにて行われている。反射式スモーク メータは、ポンプにより一定量吸込まれたディーゼルエンジンの排気黒煙がろ紙 に補集され、その汚染されたろ紙をフォトセル・アダプタの発光素子によってそ の汚染面が照射され、その反射光の強さが受光素子により測定されて表示器にそ の汚染度が表示されるように構成される。 Conventionally, measurement of flue gas concentration with a concentration rank of 2 or higher was done visually. The concentration rank ranges from 0 to 1, like the black smoke emitted from automobiles. Some flue gas concentration measurements are performed using reflective smoke meters. reflective smoke The meter is a filter paper that collects a certain amount of diesel engine exhaust smoke that is sucked in by the pump. The contaminated filter paper is then collected by the light emitting element of the photocell adapter. The contaminated surface of The level of contamination is displayed.
【０００３】 しかし、上記反射式スモークメータではディーゼルエンジンから排出される黒 煙の濃度の測定には適しているが、ディーゼルエンジンから排出される白煙の濃 度を測定できない問題点があった。0003 However, with the reflective smoke meter mentioned above, the black smoke emitted from the diesel engine Although it is suitable for measuring the concentration of smoke, it is difficult to measure the concentration of white smoke emitted from diesel engines. There was a problem that the degree could not be measured.
【０００４】 この点を解消するために、発光素子から所定の間隔をあけて発光素子に対向し て第１受光素子が設けられ、発光素子と受光素子との間に排煙が通過し、受光素 子の受光量に応じて排煙濃度を測定するように構成された光透過式スモークメー タが知られている。0004 In order to solve this problem, a light-emitting element is placed facing the light-emitting element at a predetermined distance from the light-emitting element. A first light-receiving element is provided, and exhaust smoke passes between the light-emitting element and the light-receiving element. A light-transmitting smoke meter configured to measure exhaust smoke concentration according to the amount of light received by the sensor. ta is known.
【０００５】[0005]
しかし、上記光透過式スモークメータの受光素子はその周囲の温度が変化する と、実際の排煙濃度が一定であってもその検出値が変化して正確な排煙濃度を測 定できない不具合があった。また発光素子の発する光量がその電源電圧等の変化 や発光素子の寿命により変化すると、実際の排煙濃度が一定であるにも拘らず受 光素子の検出値が変化して正確な排煙濃度を測定できない問題点があった。 However, the light-receiving element of the above-mentioned light transmission type smoke meter is subject to changes in the surrounding temperature. Even if the actual flue gas concentration is constant, the detected value changes, making it difficult to accurately measure the flue gas concentration. There was a problem that could not be determined. In addition, the amount of light emitted by the light emitting element may change due to changes in its power supply voltage, etc. Even though the actual flue gas concentration is constant, the received There was a problem in that the detection value of the optical element changed, making it impossible to accurately measure the flue gas concentration.
【０００６】 本考案の目的は、黒煙のみならず白煙の濃度を周囲温度、電源電圧等の変動が あっても正確に測定できる光透過式スモークメータを提供することにある。[0006] The purpose of this invention is to control the concentration of not only black smoke but also white smoke by controlling fluctuations in ambient temperature, power supply voltage, etc. To provide a light transmission type smoke meter that can accurately measure even if the smoke is present.
【０００７】[0007]
上記目的を達成するための本考案の構成を、実施例に対応する図１を用いて説 明する。 本考案は、発光素子１２から所定の間隔をあけて発光素子１２に対向して第１ 受光素子２１が設けられ、発光素子１２と第１受光素子２１との間に排煙１４が 通過し第１受光素子２１の受光量に応じて排煙１４濃度を測定するように構成さ れた光透過式スモークメータの改良である。 その特徴ある構成は、第１受光素子２１に近接して設けられかつ発光素子１２ が発した光を受けないように暗箱１６に内蔵された第２受光素子２２と、発光素 子１２が発した光を排煙１４内を通過させずに受ける位置に設けられた第３受光 素子２３とを備えたところにある。 また、この光透過式スモークメータ１１は第２受光素子２２又は第３受光素子 ２３のいずれか一方のみを備えることができる。 The configuration of the present invention to achieve the above object will be explained using FIG. 1 corresponding to the embodiment. I will clarify. In the present invention, the first light emitting element 12 is arranged opposite to the light emitting element 12 at a predetermined distance from the light emitting element 12. A light receiving element 21 is provided, and exhaust smoke 14 is disposed between the light emitting element 12 and the first light receiving element 21. The exhaust smoke 14 concentration is measured according to the amount of light received by the first light receiving element 21. This is an improvement of the light transmission type smoke meter. Its characteristic configuration is that the light emitting element 12 is provided close to the first light receiving element 21 and The second light-receiving element 22 is built into the dark box 16 so as not to receive the light emitted by the light-emitting element. A third light receiver provided at a position where the light emitted by the child 12 is received without passing through the smoke exhaust 14. The device 23 is provided with the element 23. Moreover, this light transmission type smoke meter 11 has a second light receiving element 22 or a third light receiving element. Only one of 23 can be provided.
【０００８】[0008]
第１受光素子２１の周囲の温度が変化すると、第１受光素子２１の検出した検 出値から第１受光素子２１とほぼ同様に温度変化する第２受光素子２２の検出し た検出値が減算され、第１受光素子２１の検出値は第１の補正がなされる。また 発光素子１２の発光量が変化すると、発光素子１２の所定の発光量に対して第３ 受光素子２３の検出する検出値である基準値と第３受光素子２３の実際の検出し た検出値との偏差が第１受光素子２１の検出した検出値に加減算され、第１受光 素子２１の検出値は第２の補正がなされる。 When the temperature around the first light receiving element 21 changes, the detection value detected by the first light receiving element 21 changes. Detection of the second light receiving element 22 whose temperature changes in almost the same way as the first light receiving element 21 from the output value. The detected value of the first light receiving element 21 is subtracted, and the detected value of the first light receiving element 21 is subjected to a first correction. Also When the amount of light emitted by the light emitting element 12 changes, the third The reference value which is the detection value detected by the light receiving element 23 and the actual detection value of the third light receiving element 23 The deviation from the detected value detected by the first light receiving element 21 is added or subtracted from the detected value detected by the first light receiving element 21. The detected value of the element 21 is subjected to a second correction.
【０００９】[0009]
次に本考案の一実施例を図面に基づいて詳しく説明する。 図１に示すように、光透過式スモークメータ１１は発光素子１２とこの発光素 子１２から所定の間隔をあけて発光素子１２に対向して設けられた第１受光素子 ２１とを備える。発光素子１２は第１受光素子２１に対向する壁に開口部３１ａ が形成された第１ケース３１に内蔵され、第１受光素子２１は発光素子１２に対 向する壁に開口部３２ａが形成された第２ケース３２に内蔵される。発光素子１ ２と第１受光素子２１との間には煙道１３から排出された排煙１４が通過するよ うに構成され、排煙１４はこの例では自動車のディーゼルエンジンから排出され た白煙である。 Next, one embodiment of the present invention will be described in detail based on the drawings. As shown in FIG. 1, the light transmission type smoke meter 11 includes a light emitting element 12 and a first light receiving element provided facing the light emitting element 12 at a predetermined distance from the child 12; 21. The light emitting element 12 has an opening 31a in the wall facing the first light receiving element 21. The first light-receiving element 21 is built in a first case 31 formed with a It is housed in a second case 32 that has an opening 32a formed in the wall facing the camera. Light emitting element 1 2 and the first light receiving element 21 so that the flue gas 14 discharged from the flue 13 passes. In this example, the exhaust gas 14 is emitted from a diesel engine of a car. It was white smoke.
【００１０】 第２ケース３２に外接して設けられた暗箱１６には第２受光素子２２が内蔵さ れ、暗箱１６は第２受光素子２２が発光素子１２の発した光を受けないように形 成される。また第１ケース３１には発光素子１２が発した光を鏡１７を介して受 ける第３受光素子２３が内蔵され、第３受光素子２３が鏡１７を介した光のみを 受けるように発光素子１２は遮光筒１８により被包される。発光素子１２はこの 例ではタングステンランプ又はネオンランプであり、第１、第２及び第３受光素 子２１，２２，２３はこの例ではＣｄＳ、ＣｄＳｅ又はＰｂＳ等の多結晶をベー スとした光導電素子である。また発光素子１２は電源１９に接続される。0010 The second light-receiving element 22 is built into the dark box 16 provided in the circumference of the second case 32. The dark box 16 is shaped so that the second light receiving element 22 does not receive the light emitted by the light emitting element 12. will be accomplished. Also, the first case 31 receives the light emitted by the light emitting element 12 via the mirror 17. A third light-receiving element 23 is built-in, and the third light-receiving element 23 receives only the light that passes through the mirror 17. The light emitting element 12 is covered with a light shielding tube 18 so as to receive the light emitting element 12 . The light emitting element 12 is An example is a tungsten lamp or a neon lamp, and the first, second and third light receiving elements In this example, the elements 21, 22, and 23 are based on polycrystals such as CdS, CdSe, or PbS. It is a photoconductive element with a low temperature. Further, the light emitting element 12 is connected to a power source 19.
【００１１】 第１、第２及び第３受光素子２１，２２，２３の検出出力はコントローラ２４ の入力インタフェース２５を介して比較回路２６に接続され、比較回路２６には 増幅回路２７及び出力インタフェース２８を介して表示器３３が接続される。ま た比較回路２６にはメモリ２９が接続され、メモリ２９には発光素子１２の所定 の発光量に対して第３受光素子２３の検出する検出値である基準値が記憶される 。比較回路２６は第１受光素子２１及び第２受光素子２２の検出したそれぞれの 検出値に基づいて演算し、第１受光素子２１の検出値は第１の補正がなされるよ うになっている。また比較回路２６は上記基準値及び第３受光素子２３の検出し た実際の検出値に基づいて演算し、第１受光素子２１の検出値は第２の補正がな されるようになっている。表示器３３には発光素子１２が発した光を完全透過す るときを０％、完全不透過するときを１００％とした不透過率を百分率で表した 排煙濃度が表示されるようになっている。 また図２は時間の経過に対する排煙濃度の変化を示し、図中において実線が補 正される前の排煙濃度の変化を示し、破線が第１の補正がなされた排煙濃度の変 化を示し、一点鎖線が更に第２の補正がなされた排煙濃度の変化を示す。[0011] The detection outputs of the first, second and third light receiving elements 21, 22, 23 are transmitted to the controller 24. is connected to the comparator circuit 26 via the input interface 25 of the comparator circuit 26. A display 33 is connected via the amplifier circuit 27 and output interface 28 . Ma A memory 29 is connected to the comparison circuit 26, and the memory 29 has a predetermined value of the light emitting element 12. A reference value, which is a detection value detected by the third light receiving element 23, is stored for the amount of light emitted. . The comparison circuit 26 detects each of the first light receiving element 21 and the second light receiving element 22. The calculation is performed based on the detected value, and the detected value of the first light receiving element 21 is subjected to the first correction. The sea urchin is turning. Further, the comparison circuit 26 detects the above reference value and the third light receiving element 23. The detected value of the first light receiving element 21 is calculated based on the actual detected value, and the detected value of the first light receiving element 21 is calculated without the second correction. It is supposed to be done. The display 33 is completely transparent to the light emitted by the light emitting element 12. The opacity is expressed as a percentage, with 0% when it is completely opaque and 100% when it is completely opaque. The exhaust smoke concentration is now displayed. Figure 2 also shows the change in flue gas concentration over time, and the solid line in the figure shows the compensation. The dashed line shows the change in flue gas concentration before the first correction. The one-dot chain line shows the change in the exhaust gas concentration after the second correction.
【００１２】 このように構成された光透過式スモークメータの動作を図１及び図２に基づい て説明する。 第１受光素子２１の周囲の温度が変化すると、第２受光素子２２の周囲の温度 も第１受光素子２１とほぼ同様に変化する。比較回路２６は第１受光素子２１の 検出した検出値から第２受光素子２２の検出した検出値を減算し、第１受光素子 ２１の検出値は図２の破線で示すように第１の補正がなされる。また電源１９の 電圧等の変化により発光素子１２の発光量が変化すると、比較回路２６はメモリ ２９に記憶された基準値と第３受光素子２３の実際に検出した検出値との偏差が 第１受光素子２１の検出した検出値に加算又は減算され、第１受光素子２１の検 出値は図２の一点鎖線で示すように更に第２の補正がなされる。このように補正 された第１受光素子２１の検出値は増幅回路２７及び出力インタフェース２８を 介して表示器３３に排煙濃度として表示される。この結果、表示器３３には常に 正確な排煙濃度が表示される。0012 The operation of the light transmission type smoke meter configured in this way is explained based on Figs. 1 and 2. I will explain. When the temperature around the first light receiving element 21 changes, the temperature around the second light receiving element 22 changes. also changes in substantially the same way as the first light receiving element 21. The comparison circuit 26 is connected to the first light receiving element 21. The detection value detected by the second light receiving element 22 is subtracted from the detected value, and the detection value detected by the first light receiving element 22 is subtracted from the detected value. The detected value No. 21 is subjected to a first correction as shown by the broken line in FIG. Also, power supply 19 When the amount of light emitted from the light emitting element 12 changes due to a change in voltage, etc., the comparison circuit 26 The deviation between the reference value stored in 29 and the detected value actually detected by the third light receiving element 23 is The detection value detected by the first light receiving element 21 is added to or subtracted from the detected value detected by the first light receiving element 21. The output value is further subjected to a second correction as shown by the dashed line in FIG. Correct like this The detected value of the first light receiving element 21 is sent to the amplifier circuit 27 and the output interface 28. It is displayed on the display 33 as the exhaust gas concentration. As a result, the display 33 always shows Accurate smoke concentration is displayed.
【００１３】 なお、実施例では第２受光素子及び第３受光素子の双方を用いて第１受光素子 の検出値を補正したが、これは一例であって第１受光素子の温度を常に一定にす ることができれば第２受光素子を用いずに第３受光素子のみでよく、発光素子が 常に一定の光量を発するようにできれば第３受光素子を用いずに第２受光素子の みでよい。 また、実施例では発光素子としてタングステンランプ又はネオンランプを挙げ たが、これに限らず電気エネルギを光エネルギに変換する素子であれば発光ダイ オード又はその他の素子でもよい。 また、実施例では受光素子としてＣｄＳ、ＣｄＳｅ又はＰｂＳ等の多結晶をベ ースとした光導電素子を挙げたが、光エネルギを電気エネルギに変換する素子で あればフォトダイオードやフォトトランジスタ等の光起電力素子でもよい。 更に、実施例ではディーゼルエンジンの排出する白煙の濃度を検出したが、デ ィーゼルエンジンの排出する黒煙の濃度又はその他の排煙濃度を検出してもよい 。[0013] In the example, both the second light receiving element and the third light receiving element are used to detect the first light receiving element. The detected value of If possible, only the third light-receiving element may be used without using the second light-receiving element, and the light-emitting element may be If it is possible to always emit a constant amount of light, the second light receiving element can be used without using the third light receiving element. It's good to see. In addition, in the examples, a tungsten lamp or a neon lamp is used as a light emitting element. However, it is not limited to this, and any element that converts electrical energy into light energy can be used as a light emitting diode. It may also be an ode or other element. In addition, in the examples, a polycrystalline material such as CdS, CdSe, or PbS is used as the light receiving element. Although we have mentioned the photoconductive element as a base, it is an element that converts light energy into electrical energy. If available, a photovoltaic element such as a photodiode or a phototransistor may be used. Furthermore, in the example, the concentration of white smoke emitted by a diesel engine was detected; The concentration of black smoke emitted by a diesel engine or other exhaust smoke may also be detected. .
【００１４】[0014]
以上述べたように、本考案によれば、発光素子から所定の間隔をあけて発光素 子に対向して第１受光素子が設けられ、発光素子と第１受光素子との間に排煙が 通過し、第１受光素子が受けた光量に応じて排煙濃度を測定し、第１受光素子に 近接して設けられた第２受光素子が発光素子の発した光を受けないように暗箱に 内蔵され、発光素子が発した光を排煙内を通過させずに直接受ける位置に第３受 光素子が設けられたので、光透過式スモークメータに起因する誤差が補正され、 排煙の濃度を正確に測定することができる。この光透過式スモークメータは反射 式スモークメータでは測定できない白煙の濃度の検出に適している。 As described above, according to the present invention, the light emitting element is spaced apart from the light emitting element by a predetermined distance. A first light-receiving element is provided opposite to the light-emitting element, and exhaust smoke is disposed between the light-emitting element and the first light-receiving element. The flue gas concentration is measured according to the amount of light received by the first light-receiving element. Place it in a dark box so that the second light-receiving element installed nearby does not receive the light emitted by the light-emitting element. Built-in, there is a third receiver located at a position where the light emitted by the light emitting element is directly received without passing through the smoke exhaust. Since the optical element is installed, the error caused by the light transmission type smoke meter is corrected, The concentration of flue gas can be measured accurately. This light transmission type smoke meter is reflective Suitable for detecting the concentration of white smoke that cannot be measured with a type smoke meter.
【図１】本考案一実施例の光透過式スモークメータの構
成図。FIG. 1 is a configuration diagram of a light transmission type smoke meter according to an embodiment of the present invention.
【図２】時間の経過に対する排煙濃度の変化を示す図。FIG. 2 is a diagram showing changes in exhaust gas concentration over time.
１１ 光透過式スモークメータ １２ 発光素子 １４ 排煙 １６ 暗箱 ２１ 第１受光素子 ２２ 第２受光素子 ２３ 第３受光素子 11 Light transmission type smoke meter 12 Light emitting element 14 Smoke exhaust 16 Dark box 21 First light receiving element 22 Second light receiving element 23 Third light receiving element
Claims (1)
記発光素子(12)に対向して第１受光素子(21)が設けら
れ、前記発光素子(12)と前記第１受光素子(21)との間に
排煙(14)が通過し前記第１受光素子(21)の受光量に応じ
て前記排煙(14)濃度を測定するように構成された光透過
式スモークメータにおいて、前記第１受光素子(21)に近
接して設けられかつ前記発光素子(12)が発した光を受け
ないように暗箱(16)に内蔵された第２受光素子(22)又は
前記発光素子(12)が発した光を前記排煙(14)内を通過さ
せずに受ける位置に設けられた第３受光素子(23)のいず
れか一方又は双方を備えたことを特徴とする光透過式ス
モークメータ。1. A first light-receiving element (21) is provided opposite the light-emitting element (12) at a predetermined distance from the light-emitting element (12), and the light-emitting element (12) and the first light-receiving element (21), and is configured to allow flue gas (14) to pass between the light receiving element (21) and measure the concentration of the flue gas (14) according to the amount of light received by the first light receiving element (21). , a second light-receiving element (22) or the light-emitting element that is provided close to the first light-receiving element (21) and built in a dark box (16) so as not to receive the light emitted by the light-emitting element (12); A light transmission type characterized by comprising either one or both of the third light receiving element (23) provided at a position to receive the light emitted by (12) without passing through the smoke exhaust (14). smoke meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4557391U JPH04130058U (en) | 1991-05-21 | 1991-05-21 | Transparent smoke meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4557391U JPH04130058U (en) | 1991-05-21 | 1991-05-21 | Transparent smoke meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04130058U true JPH04130058U (en) | 1992-11-30 |
Family
ID=31925403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4557391U Pending JPH04130058U (en) | 1991-05-21 | 1991-05-21 | Transparent smoke meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04130058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101694079B1 (en) * | 2015-12-23 | 2017-01-09 | 대전대학교 산학협력단 | Apparatus for measuring the optical smoke density by light extinction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63124935A (en) * | 1986-11-14 | 1988-05-28 | Hochiki Corp | Dimming type smoke sensor |
| JPH01105134A (en) * | 1987-10-19 | 1989-04-21 | Komatsugawa Kakoki Kk | Photometric device |
-
1991
- 1991-05-21 JP JP4557391U patent/JPH04130058U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63124935A (en) * | 1986-11-14 | 1988-05-28 | Hochiki Corp | Dimming type smoke sensor |
| JPH01105134A (en) * | 1987-10-19 | 1989-04-21 | Komatsugawa Kakoki Kk | Photometric device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101694079B1 (en) * | 2015-12-23 | 2017-01-09 | 대전대학교 산학협력단 | Apparatus for measuring the optical smoke density by light extinction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI468073B (en) | Field Sensitive Sensitivity Adjustment Device for Light Sensing Non - contact Switching Device (SW) | |
| US4040740A (en) | Opto-electronic sensor | |
| JP2604754B2 (en) | Spectrophotometer | |
| JPH09501253A (en) | Infrared type intrusion detector | |
| US20050190370A1 (en) | Turbidity sensing system with reduced temperature effects | |
| GB2083313A (en) | Distance detecting device | |
| JPH04130058U (en) | Transparent smoke meter | |
| KR910700446A (en) | Photometric detectors for internal combustion engines, engine operation and temperature sensing | |
| US4707614A (en) | Self-contained portable photoelectric gas measuring and warning apparatus | |
| CN114063094A (en) | Photoelectric sensor based laser sensing distance method and photoelectric sensor | |
| JPH04301769A (en) | Liquid sensor | |
| KR102413565B1 (en) | Improved chimney dust gauge | |
| CN215374218U (en) | Illuminance measuring device | |
| CN211262494U (en) | Temperature detection system | |
| JPH08247722A (en) | Dimension measuring instrument | |
| JPH0714809Y2 (en) | Optical displacement meter | |
| CN209673119U (en) | A kind of imaging type photoelectric rectification sensor | |
| JPH05203495A (en) | Color meter and color measuring method for color meter | |
| US4168125A (en) | Light sensing device | |
| JP3756549B2 (en) | Width detection device for transported paper sheets | |
| JPH0321508Y2 (en) | ||
| JPH0729427U (en) | Online inspection device for radiation thermometer | |
| SU449238A1 (en) | Photoelectric device for retrieving information from the rotor of a cordless gyroscope | |
| JPH03197847A (en) | Oil deterioration detector | |
| CN110068307A (en) | Range-measurement system and the method for measuring distance |