JPH01113646A - Composite sensor for coal heap - Google Patents
Composite sensor for coal heapInfo
- Publication number
- JPH01113646A JPH01113646A JP27035587A JP27035587A JPH01113646A JP H01113646 A JPH01113646 A JP H01113646A JP 27035587 A JP27035587 A JP 27035587A JP 27035587 A JP27035587 A JP 27035587A JP H01113646 A JPH01113646 A JP H01113646A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- coal
- water
- moisture
- gypsum
- 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
Links
- 239000003245 coal Substances 0.000 title claims abstract description 44
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 18
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 16
- 239000010440 gypsum Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000011505 plaster Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 2
- 230000005855 radiation Effects 0.000 abstract 1
- 239000002023 wood Substances 0.000 description 7
- 238000000605 extraction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、屋内、屋外の貯炭場に堆積された石炭（以
下、堆積石炭または石炭パイルともいう、）の温度と水
分含有量とを同時に検出するセンサ（以下、複合センサ
ともいう、）に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention simultaneously measures the temperature and moisture content of coal deposited in an indoor or outdoor coal storage yard (hereinafter also referred to as deposited coal or coal pile). The present invention relates to a detecting sensor (hereinafter also referred to as a composite sensor).
例えば、石炭を使用する石炭焚火力発電所等においては
、石炭を貯蔵すべく屋内または屋外の貯炭場に長時間堆
積した状態で放置しておくことがあるが、か＼る場合に
は、堆積時間が経過するにつれて温度が徐々に上昇し、
水分も減少して遂には自然発火に至るおそれのあること
が知られている。この発火の条件は大体のところ温度と
水分に依存しており、例えば、石炭表面に付着している
水分（付着水分）が１％以下、または付着水分と石炭細
孔内に含まれる水分（固有水分）との和で表わされる全
水分が５％以下で、温度が８０〜９０°Ｃ以上になると
発火すること、また、石炭パイルにおいては、その表面
から２〜３ｍの深さにある所が最も高温になり易く、発
火し易い部分であること等の点が明らかにされている。For example, in coal-fired power plants that use coal, coal is sometimes left in an indoor or outdoor coal yard for a long time in a piled state. As time passes, the temperature gradually increases,
It is known that moisture content may also decrease, potentially leading to spontaneous combustion. The conditions for this ignition generally depend on temperature and moisture; for example, the moisture adhering to the coal surface (adhered moisture) is less than 1%, or the adhering moisture and the moisture contained in the coal pores (inherent moisture) are less than 1%. If the total moisture (expressed as the sum of moisture) is less than 5% and the temperature exceeds 80 to 90 degrees Celsius, it will ignite.In addition, in a coal pile, a portion 2 to 3 meters deep from the surface will ignite. It has been clarified that this is the part that easily reaches the highest temperature and is most likely to catch fire.
したがって、石炭パイルの複数箇所にそれぞれセンサを
予め挿入しておくか、あるいは赤外線カメラにて自然発
火のおそれのある位置を予め検出し、その都度該当位置
にセンサを挿入して石炭パイル内温度と水分含有量とを
検知しなければならず、さらに危険が検知されたらブル
ドーザ等を用いて掘削、転圧したり、または放水する等
して自然発火を未然に防ぐことが必要となる。Therefore, it is necessary to insert sensors in advance at multiple locations in the coal pile, or to use an infrared camera to detect locations where there is a risk of spontaneous combustion, and to insert sensors at the relevant locations each time to check the temperature inside the coal pile. It is necessary to detect the moisture content, and if danger is detected, it is necessary to prevent spontaneous combustion by excavating or compacting using a bulldozer or the like, or by spraying water.
そこで、出願人は石炭パイル内の同一箇所における水分
と温度の同時測定が可能な複合センサを出願している（
特開昭６０−１４４６５１号公報参照）。これは、石炭
パイルに対して挿抜自在な保護管内に温度センサと、こ
のセンサ表面に形成した電極と他の電極との間に石膏を
充填して形成された水分センサとを併設し、同一位置の
温度と水分とを同時に測定できるようにしたものである
。Therefore, the applicant has applied for a composite sensor that can simultaneously measure moisture and temperature at the same location in a coal pile (
(See Japanese Patent Application Laid-Open No. 144651/1983). This system has a temperature sensor inside a protective tube that can be inserted into and removed from the coal pile, and a moisture sensor that is formed by filling plaster between an electrode formed on the surface of this sensor and another electrode. This allows for simultaneous measurement of temperature and moisture content.
しかしなから、か−る複合センサは石炭の銘柄（種類）
や粒子の大きさ（粒径）により、特に水分検出特性が可
成り異なると云う問題がある。However, for some reason, the composite sensor is able to detect the brand (type) of coal.
There is a problem in that the moisture detection characteristics in particular vary considerably depending on the size of the particles (particle diameter).
したがって、この発明は特に石炭の銘柄や粒径によって
水分検出特性が余り影響を受けない、堆積石炭用複合セ
ンサを提供することを目的とする。Therefore, it is an object of the present invention to provide a composite sensor for deposited coal whose moisture detection characteristics are not particularly affected by the brand or particle size of the coal.
堆積石炭用複合センサの石膏内に、石英ガラス粒子を所
定の割合で混入する。Quartz glass particles are mixed into the gypsum of the composite sensor for deposited coal at a predetermined ratio.
石膏内に石英ガラス粒子を混入すると、水分検出特性が
石炭の銘柄や粒径に関係なく略−義的に定まることを数
々の実験により確かめ、これを利用することにより上記
問題の解決を図る。なお、石炭の銘柄と粒径を変えてそ
の水分Ｗ（％）と検出抵抗Ｒ（ＫΩ）との関係を求めた
実験結果を第８図に示す。同図からも明らかなように、
多小のばらつきはあるもの一路１つの線Ｘ上にあると考
えることができる。つまり、検出抵抗Ｒ（ＫΩ）と水分
Ｗ（％）との関係には、
ＬｏｇＲ＝ Ａ ＋ Ｂ ＬｏｇＷ ・−４１
）なる関係にあることが実験の結果明らかにされている
。こ−に、Ａ、Ｂはセンサの電極構造等によって定まる
定数である。Through a number of experiments, we have confirmed that when quartz glass particles are mixed into gypsum, the moisture detection characteristics are essentially fixed regardless of the brand of coal or the particle size, and by utilizing this we aim to solve the above problem. Incidentally, FIG. 8 shows the results of an experiment in which the relationship between the water content W (%) and the detection resistance R (KΩ) was determined by changing the brand of coal and the particle size. As is clear from the figure,
It can be considered that all variations are on a single line X. In other words, the relationship between detection resistance R (KΩ) and moisture W (%) is as follows: LogR = A + B LogW ・-41
) has been revealed through experiments. Here, A and B are constants determined by the electrode structure of the sensor, etc.
第１図はこの発明による複合センサの内部構造を示す断
面図、第１Ａ図は第１図の線Ａ−Ａ’に沿う断面図、第
２図は複合センサの外観図である。FIG. 1 is a sectional view showing the internal structure of a composite sensor according to the present invention, FIG. 1A is a sectional view taken along line AA' in FIG. 1, and FIG. 2 is an external view of the composite sensor.
この発明による複合センサ１は、外観的には第２図に示
すように、保護管１０と先端部１１と取っ手１２とから
構成され、石炭パイル２の内部所定位置に挿入して使用
される。前述の如く、石炭パイル２はその表面から２〜
３ｍの深さにある位置が最も高温になり易いので、複合
センサ１の全長も２〜３ｍ程度に選ばれ、その先端部１
１は石炭パイル２内への挿入が容易になるように、例え
ば円錐形状に形成される一方、その他端には挿抜を容易
にするための取っ手１２が設けられる。なお、この取っ
手１２はセンサｌが石炭パイル内に潜り込んでしまわな
いように、潜り止めの役目も果している。保護管１０は
ステンレス製のパイプからなり、その先端部近傍の所定
位置には、水分を吸、脱水するための複数の開口１７が
形成されている。As shown in FIG. 2, the composite sensor 1 according to the present invention is comprised of a protective tube 10, a tip 11, and a handle 12, and is used by being inserted into a predetermined position inside a coal pile 2. As mentioned above, the coal pile 2 is
Since the position at a depth of 3 m is likely to reach the highest temperature, the total length of the composite sensor 1 is also selected to be approximately 2 to 3 m, and its tip 1
1 is formed into a conical shape, for example, so that it can be easily inserted into the coal pile 2, and a handle 12 is provided at the other end to facilitate insertion and removal. Note that this handle 12 also serves as a stopper to prevent the sensor l from sinking into the coal pile. The protection tube 10 is made of a stainless steel pipe, and a plurality of openings 17 for absorbing and dehydrating water are formed at predetermined positions near the tip thereof.
センサ内部は第１図の如く、先端部１１、電極１３．１
３’、本体部１５およびジヨイント部１６に大別され、
本体部１５と先端部１１．ジヨイント部１６はそれぞれ
ネジ部１８によって結合されている。本体部１５の中空
部には電極１３．１３′が設けられており、これらの間
には例えば石膏に石英ガラス粒子を混入した、水分の吸
脱木材Ｃが充填されている（斜線部参照）。本体部１５
の周辺には石炭中の水分の吸収、脱水のための開口１７
が複数設けられているので、吸脱木材Ｃはこの間口１７
を通して外部と接触することになり、したがって、複合
センサが石炭パイル内に挿入されると、その内部の水分
は吸脱木材Ｃを通して浸透して水分の平衡状態が保たれ
、これによって水分検知が行なわれる一方、熱電対１３
Ａによる温度検知が行なわれる。なお、このセンサを石
炭パイルから抜き出して大気中に放置すると石膏内の水
分は蒸発し、再び使用可能な状態に復元する。As shown in Figure 1, the interior of the sensor includes a tip 11 and an electrode 13.1.
3', main body part 15 and joint part 16,
Main body part 15 and tip part 11. The joint parts 16 are connected by threaded parts 18, respectively. Electrodes 13, 13' are provided in the hollow part of the main body 15, and a moisture absorbing/absorbing wood C made of, for example, plaster mixed with quartz glass particles is filled between these electrodes (see the shaded area). . Main body part 15
There are openings 17 around the coal for absorption and dehydration of moisture in the coal.
Since there are multiple openings, the suction/extraction wood C is
Therefore, when the composite sensor is inserted into the coal pile, the moisture inside will penetrate through the adsorption-extraction wood C to maintain the moisture equilibrium state, thereby performing moisture detection. On the other hand, thermocouple 13
Temperature detection is performed by A. Note that when this sensor is removed from the coal pile and left in the atmosphere, the moisture in the gypsum evaporates and the sensor is restored to a usable state.
また、１９は絶縁部であり、電極１３．１３’と保護管
１０、本体部１５およびジヨイント部−６とを電気的に
絶縁するために設けられている。さらに、電極１３は例
えばシース形熱電対１３Ａからなる測温センサの表面に
金メツキを施して形成し、これにより温度センサと水分
センサとの双方を備えた複合センサを構成するようにし
ている。Moreover, 19 is an insulating part, which is provided to electrically insulate the electrodes 13 and 13' from the protective tube 10, the main body part 15, and the joint part-6. Further, the electrode 13 is formed by, for example, plating the surface of a temperature sensor consisting of a sheathed thermocouple 13A with gold, thereby configuring a composite sensor having both a temperature sensor and a moisture sensor.
なお、このよう゛に構成される複合センサは、石炭パイ
ル中に挿入されるような苛酷な状況下で使用されること
から、特に図示はしていないが、水密。Note that the composite sensor configured in this manner is used under harsh conditions such as being inserted into a coal pile, so it is watertight, although not particularly shown.
気密となるように工夫されている。It is designed to be airtight.
温度センサ１３Ａからの出力は、リード線Ｌ２゜Ｌ３を
介して図示されない温度検出回路に与えられて温度計測
が行なわれる一方、１対の電極１３゜１３′からなる水
分センサからの出力は、リード線ＬＯ，Ｌｌを介して水
分検出回路に与えられて水分計測が行なわれる。第３図
に水分検出回路の具体例を示す。The output from the temperature sensor 13A is sent to a temperature detection circuit (not shown) via lead wires L2゜L3 to measure the temperature, while the output from the moisture sensor consisting of a pair of electrodes 13゜13' It is applied to the moisture detection circuit via lines LO and Ll to perform moisture measurement. FIG. 3 shows a specific example of the moisture detection circuit.
同図において、３１は水分センサ、３２は発振器、３３
はローパスフィルタ、３４Ａ、３４Ｂはダイオード、３
５は対数増幅器（ログアンプ）、３６は出力アンプであ
る。In the figure, 31 is a moisture sensor, 32 is an oscillator, and 33 is a moisture sensor.
is a low-pass filter, 34A and 34B are diodes, 3
5 is a logarithmic amplifier, and 36 is an output amplifier.
すなわち、水分センサ３１の出力を発振器３２からの所
定周波数の交流信号によって変調し、その一方をローパ
スフィルタ３３およびダイオード３４Ａを介して、また
他方をダイオード３４Ｂを介してそれぞれ整流した後、
対数増幅器３５にてセンサ出力の対数出力を得、これを
出力アンプ３６を介して取り出すものである。こ＼で、
対数増幅器３５を用いるのは、検出抵抗と石炭中の水分
との関係が先の（１）式の如く、対数の関係で表わされ
るからである。That is, after modulating the output of the moisture sensor 31 with an AC signal of a predetermined frequency from the oscillator 32, and rectifying one of them through the low-pass filter 33 and the diode 34A, and the other through the diode 34B,
A logarithmic output of the sensor output is obtained by a logarithmic amplifier 35 and taken out via an output amplifier 36. Here,
The reason why the logarithmic amplifier 35 is used is that the relationship between the detection resistance and the moisture in the coal is expressed as a logarithmic relationship as shown in equation (1) above.
第４図はこの発明の他の実施例を示す断面図、第４Ａ図
はそのＡ−Ａ’線に沿う断面図である。FIG. 4 is a sectional view showing another embodiment of the present invention, and FIG. 4A is a sectional view taken along the line AA'.
これは第１図に示す電極１３’のかわりに導電部１４を
設ける一方、保護管１０を導電体とし、これらの間に吸
脱木材Ｃを配置して水分センサを形成することにより、
構造の簡略化を図ったものである。したがって、図示さ
れないリード線ＬＯは保護管１０と接続され、これとリ
ード線Ｌ１を第３図に示す水分検出回路に導くことによ
り、第１図の場合と同様に水分検出が可能となる。This is achieved by providing a conductive portion 14 instead of the electrode 13' shown in FIG. 1, using the protective tube 10 as a conductor, and arranging the suction/extraction wood C between them to form a moisture sensor.
This is an attempt to simplify the structure. Therefore, the lead wire LO (not shown) is connected to the protection tube 10, and by guiding this and the lead wire L1 to the moisture detection circuit shown in FIG. 3, moisture detection becomes possible in the same manner as in the case of FIG. 1.
第４図の構成で、吸脱木材を石膏のみとした場合と、石
膏に石英ガラス粒子を混入した場合の、水分対検出抵抗
との関係を示すと、例えば第５図の如くなる。こ−に、
「ＯＪ印で表わされる点が。For example, in the configuration shown in FIG. 4, the relationship between moisture and detection resistance is shown in FIG. 5 when only gypsum is used as the adsorbing/extracting wood and when quartz glass particles are mixed in the gypsum. To this day,
``The point indicated by the OJ seal.
石膏のみの場合を示し、「Δ」印で表わされる点が石英
ガラス混入の場合を示している。両者を比較すれば明ら
かなように、石英ガラスを混入した場合の方が、同じ検
出抵抗範囲に対して水分の変化範囲が大きいので、精度
良く水分検出が行なわれることになる。なお、石英ガラ
ス粒子の混入割合は、強度との関係から略２０％程度と
される。The case where only gypsum is used is shown, and the points indicated by the "Δ" mark show the case where quartz glass is mixed. As is clear from comparing the two, when quartz glass is mixed, the range of moisture change is larger for the same detection resistance range, so moisture detection can be performed with higher accuracy. Note that the mixing ratio of quartz glass particles is approximately 20% from the viewpoint of strength.
同様に、吸脱木材を石膏のみとした場合と、石膏に石英
ガラスを混入した場合の、水分センサ出力を経過時間と
＼もに観測すると、例えば第６図のようになる。こ＼に
、「Ｏ」印で表わされる点が石英ガラス混入の場合を示
し、「口」印で表わされる点が石膏のみの場合を示して
いる。これらから、石英ガラスを混入した場合の方が、
水分センサ出力が安定化する迄の時間、つまり応答時間
が短縮されることがわかる。Similarly, when the moisture sensor output is observed with respect to the elapsed time when only gypsum is used as the adsorbing/extracting wood and when quartz glass is mixed with the gypsum, the results are as shown in FIG. 6, for example. Here, the points indicated by the "O" mark indicate the case where quartz glass is mixed, and the points indicated by the "mouth" mark indicate the case where only gypsum is present. From these, it is better to mix quartz glass.
It can be seen that the time it takes for the moisture sensor output to stabilize, that is, the response time, is shortened.
、 第７図は水分センサの電極間距離および電極構造を
変えた場合の水分検出特性の変化を示すもので、同図（
イ）は電極間間隔（第４図Ｄ１参照）を変えた場合、同
図（ロ）は電極の直径（第４図Ｄ２参照）は変えずにそ
の長さ（第４図Ｄ３参照）を変えた場合をそれぞれ示し
ている。, Figure 7 shows the change in moisture detection characteristics when the distance between the electrodes of the moisture sensor and the electrode structure are changed.
(a) is when the inter-electrode spacing (see Fig. 4 D1) is changed, and the same figure (b) is when the length (see Fig. 4 D3) is changed without changing the electrode diameter (see Fig. 4 D2). Each case is shown below.
なお、第１図の場合でも、第５図および第６図の如き特
性を示すことは云う迄もない。It goes without saying that even the case shown in FIG. 1 exhibits the characteristics as shown in FIGS. 5 and 6.
この発明によれば、石膏に石英ガラス粒子を混入するだ
けで、石炭の銘柄や粒径を意識すること無く、高速かつ
高精度に水分検出を行なうことが可能になる利点がもた
らされる。According to the present invention, an advantage is provided that moisture can be detected at high speed and with high precision simply by mixing quartz glass particles into gypsum without being concerned with the brand of coal or the particle size.
第１図はこの発明による複合センサの内部構造を示す断
面図、第１Ａ図は第１図の線Ａ−Ａ’に沿う断面図、第
２図は複合センサの外観図、第３図は水分検出回路の具
体例を示すブロック図、第４図はこの発明の他の実施例
を示す構成図、第４Ａ図は第４図の線Ａ−Ａ’に沿う断
面図、第５図は石膏だけの場合と石膏に石英ガラス粒子
を混入した場合の水分検出特性の相違を説明するための
グラフ、第６図は石膏だけの場合と石膏に石英ガラス粒
子を混入した場合の水分検出応答特性の相違を説明する
ためのグラフ、第７図は水分センサの電極間距離および
電極構造を変えた場合の水分検出特性の変化を説明する
ためのグラフ、第８図は石炭の銘柄１粒径を変えたとき
の水分と検出抵抗との関係を示すグラフである。
符号説明
１・・・・・・複合センサ、２・・・・・・石炭パイル
、１０・・・・・・保護管、１１・・・・・・先端部、
１２・・・・・・取っ手、１３．１３’・・・・・・電
極、１３Ａ・・・・・・熱電対（温度センサ）、１４・
・・・・・導電部、１５・・・・・・本体部、１６・・
・・・・ジヨイント部、１７・・・開口、１８・・・・
・・ネジ部、１９・・・絶縁部、３１・・・・・・水分
センサ、３２・・・・・・発振器、３３・・・・・・ロ
ーパスフィルタ、３４Ａ、３４Ｂ・・・・・・ダイオー
ド、３５・・・・・・対数増幅器（ログアンプ）、３６
・・・・・・出力アンプ、Ｃ・・・・・・吸脱木材、Ｌ
Ｏ〜Ｌ３・・・・・・リード線。
代理人 弁理士 並 木 昭 夫
代理人 弁理士 松 崎 清
簾１５１１ 遍ＩＡ囚
冨 ２ 図
第 ３ 図
１１４図
１５図 。２
水分（２）−
第 ６ 図
ＭｉａＢ寺Ｆ５ （ＪＩｖＬ）
水分（％）−
！Ｉ７ 因
１口）
水’？ｊ（’／、）−Fig. 1 is a sectional view showing the internal structure of a composite sensor according to the present invention, Fig. 1A is a sectional view taken along line A-A' in Fig. 1, Fig. 2 is an external view of the composite sensor, and Fig. 3 is a sectional view showing the internal structure of the composite sensor according to the present invention. FIG. 4 is a block diagram showing a specific example of the detection circuit, FIG. 4 is a configuration diagram showing another embodiment of the present invention, FIG. 4A is a cross-sectional view taken along line A-A' in FIG. 4, and FIG. 5 shows only plaster. Figure 6 is a graph to explain the difference in moisture detection characteristics between when gypsum is used and when quartz glass particles are mixed into plaster. Figure 7 is a graph to explain the change in moisture detection characteristics when the distance between the electrodes of the moisture sensor and the electrode structure are changed. Figure 8 is a graph when the grain size of one brand of coal is changed. It is a graph showing the relationship between moisture and detection resistance at the time. Description of symbols 1...Composite sensor, 2...Coal pile, 10...Protection tube, 11...Tip part,
12...Handle, 13.13'...Electrode, 13A...Thermocouple (temperature sensor), 14.
...Conductive part, 15... Main body part, 16...
...Joint part, 17...Opening, 18...
...Screw part, 19...Insulation part, 31...Moisture sensor, 32...Oscillator, 33...Low pass filter, 34A, 34B... Diode, 35... Logarithmic amplifier (log amplifier), 36
...Output amplifier, C...Suction/extraction wood, L
O~L3...Lead wire. Agent Patent Attorney Akio Namiki Agent Patent Attorney Seiren Matsuzaki 1511 Ben IA Prisoner 2 Figure 3 Figure 114 Figure 15. 2 Moisture (2) - Figure 6 MiaB temple F5 (JIvL) Moisture (%) - ! I7 1 mouth) Water'? j('/,)−
Claims (1)
て挿抜自在な所定長さの保護管内部に石膏を充填し、さ
らにその内部に堆積石炭内所定位置の温度を検出する温
度センサと、１対の電極からなり前記保護管に形成され
た開口を介して石膏に吸、脱水される水分による電極間
抵抗値から水分含有量を検出する水分センサとを有して
なる堆積石炭用複合センサにおいて、 前記石膏内に石英ガラス粒子を所定の割合をもって混入
したことを特徴とする堆積石炭用複合センサ。 ２）特許請求の範囲第１項に記載の堆積石炭用複合セン
サにおいて、前記保護管を導電性とし、これを前記水分
センサの一方の電極として用いることを特徴とする堆積
石炭用複合センサ。 ３）特許請求の範囲第１項に記載の堆積石炭用複合セン
サにおいて、前記１対の電極の一方を温度センサ表面に
形成することを特徴とする堆積石炭用複合センサ。[Claims] 1) A protective tube of a predetermined length that has a plurality of openings in a predetermined portion and can be inserted into and removed from the deposited coal is filled with gypsum, and the inside of the protective tube is filled with gypsum. It has a temperature sensor that detects temperature, and a moisture sensor that is made up of a pair of electrodes and that detects moisture content from the interelectrode resistance value due to moisture absorbed and dehydrated by the plaster through an opening formed in the protective tube. A composite sensor for deposited coal, characterized in that quartz glass particles are mixed in the gypsum at a predetermined ratio. 2) The composite sensor for deposited coal according to claim 1, wherein the protective tube is electrically conductive and is used as one electrode of the moisture sensor. 3) The composite sensor for deposited coal according to claim 1, wherein one of the pair of electrodes is formed on the surface of the temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27035587A JPH01113646A (en) | 1987-10-28 | 1987-10-28 | Composite sensor for coal heap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27035587A JPH01113646A (en) | 1987-10-28 | 1987-10-28 | Composite sensor for coal heap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01113646A true JPH01113646A (en) | 1989-05-02 |
| JPH0445779B2 JPH0445779B2 (en) | 1992-07-27 |
Family
ID=17485112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27035587A Granted JPH01113646A (en) | 1987-10-28 | 1987-10-28 | Composite sensor for coal heap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01113646A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5947455A (en) * | 1995-12-05 | 1999-09-07 | Honda Giken Kogyo Kabushiki Kaisha | Liquid-encapsulated vibration-proof mount device |
| JP2009075076A (en) * | 2007-08-28 | 2009-04-09 | Yamari Sangyo Kk | Heat-resistant protective box of temperature measuring instrument, temperature measuring device using this, and temperature measuring method |
-
1987
- 1987-10-28 JP JP27035587A patent/JPH01113646A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5947455A (en) * | 1995-12-05 | 1999-09-07 | Honda Giken Kogyo Kabushiki Kaisha | Liquid-encapsulated vibration-proof mount device |
| JP2009075076A (en) * | 2007-08-28 | 2009-04-09 | Yamari Sangyo Kk | Heat-resistant protective box of temperature measuring instrument, temperature measuring device using this, and temperature measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0445779B2 (en) | 1992-07-27 |
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