JPH06105231B2 - Signal processing method of ice amount sensor - Google Patents
Signal processing method of ice amount sensorInfo
- Publication number
- JPH06105231B2 JPH06105231B2 JP63127164A JP12716488A JPH06105231B2 JP H06105231 B2 JPH06105231 B2 JP H06105231B2 JP 63127164 A JP63127164 A JP 63127164A JP 12716488 A JP12716488 A JP 12716488A JP H06105231 B2 JPH06105231 B2 JP H06105231B2
- Authority
- JP
- Japan
- Prior art keywords
- conductivity
- ice
- relative
- change
- ipf
- 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 - Lifetime
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明、ダイナミック型氷蓄熱システムにおいて氷量を
導電率を用いて検出する方法に関するものである。The present invention relates to a method for detecting the amount of ice by using conductivity in a dynamic ice heat storage system.
一般に氷量の単位としては、氷充填率すなわちIPF（Ice
PackingFactor、％）が使われており、これは種々の定
義があるが、本願においては次式で示す定義を用いる。Generally, the unit of ice volume is ice filling rate or IPF (Ice
PackingFactor,%) is used and there are various definitions, but in the present application, the definition shown by the following formula is used.
氷充填率＝（できた氷の量／初期液体重量）× 100 ・・・・・（１） 従来のダイナミック型氷蓄熱システムにおいては上記氷
充填率を求めることができず、スタティック型蓄熱シス
テムを使用して上記氷充填率を求めていた。このため、
ダイナミック型蓄熱システムで上記氷充填率が求まる方
法が要請されていた。Ice filling rate = (amount of ice produced / initial liquid weight) × 100 (1) In the conventional dynamic type ice heat storage system, the above-mentioned ice filling rate could not be obtained, and a static type heat storage system was used. It was used to determine the ice fill factor. For this reason,
There has been a demand for a method for obtaining the ice filling rate in a dynamic heat storage system.
この要請に対し、次に述べるような方法が提案された。In response to this request, the following method was proposed.
初期液体重量をＡ、水の重量をW0、添加剤の重量をＸと
すれば、 Ａ＝W0＋Ｘ ・・・・・（２） 次に、できた氷の重量をＢ、残っている水の重量をW1と
すると、 Ｂ＝W0−W1＝Ａ−（Ｘ＋W1） ＝Ａ〔１−（Ｘ＋W1）/A〕 ・・・・・（３） となる。次に、初期状態における添加剤濃度（以下、
「初期添加剤濃度」という）をφ0、ある時点における
添加剤濃度（以下、「任意時期添加剤濃度」という）を
φ1とすれば、 φ0＝100X/A ＝100（Ａ−W0）/A ・・・・・（４） φ1＝100X/（W1＋Ｘ） ＝φ0A/（W1＋Ｘ） ・・・・・・（５） （４），（５）式から φ0／φ1＝（W1＋Ｘ）/A ・・・・・（６） （３），（６）式から Ｂ＝Ａ（１−φ0／φ1） ・・・・・（７） 従って、できた氷の重量Ｂは、初期液体重量Ａ、初期添
加剤濃度φ0、任意時期添加剤濃度φ1から求まる。この
場合、初期液体重量Ａと初期添加剤濃度φ0は既知であ
り、任意時期添加剤濃度φ1を何らかの方法で求めるこ
とができれば、できた氷の重量Ｂは求まる。また、
（１）式と（７）式から、 氷充填率IPF＝100B/A ＝100（１−φ0／φ1） ・・・・・・（８） 従って、任意時期添加剤濃度が求まれば、氷充填率は求
まる。Assuming that the initial liquid weight is A, the weight of water is W 0 , and the weight of the additive is X, A = W 0 + X (2) Then, the weight of the resulting ice is B and the remaining weight When the weight of water is W 1 , B = W 0 −W 1 = A− (X + W 1 ) = A [1− (X + W 1 ) / A] (3) Next, the additive concentration in the initial state (hereinafter,
0 is called "initial additive concentration") phi, additive concentration (hereinafter at a point in time, if the) that "arbitrary timing additive concentration" phi 1 and, φ 0 = 100X / A = 100 (A-W 0 ) / A (4) φ 1 = 100X / (W 1 + X) = φ 0 A / (W 1 + X) ··· (5) From formulas (4) and (5), φ 0 / φ 1 = (W 1 + X) / A (6) From equations (3) and (6), B = A (1-φ 0 / φ 1 ) (7) Therefore The weight B of the produced ice is obtained from the initial liquid weight A, the initial additive concentration φ 0 , and the additive concentration φ 1 at any time. In this case, the initial liquid weight A and the initial additive concentration φ 0 are known, and if the additive concentration φ 1 at any time can be obtained by some method, the weight B of the produced ice can be obtained. Also,
From equations (1) and (7), ice filling rate IPF = 100B / A = 100 (1-φ 0 / φ 1 ) ... (8) Therefore, if the additive concentration at any given time is obtained , The ice filling rate can be obtained.
一方、溶液導電率（ここでは水の導電率）と溶液の添加
剤濃度についての実験の結果、導電率と添加剤濃度があ
る範囲では比例することがわかった。添加剤濃度は導電
率と温度の関数であり、ある一定温度での導電率に換算
すれば、導電率のみの関数で表わすことができ、しかも
添加剤濃度と導電率は比例していることが実験によりわ
かった。従って、（８）式から、導電率により氷充填率
IPFを求めることができることがわかる。On the other hand, as a result of experiments on the solution conductivity (here, the conductivity of water) and the additive concentration of the solution, it was found that the conductivity and the additive concentration were proportional in a certain range. The additive concentration is a function of conductivity and temperature, and if converted into conductivity at a certain constant temperature, it can be expressed as a function of conductivity alone, and the additive concentration and conductivity are proportional. It turned out by experiment. Therefore, from Equation (8), the ice filling rate can be determined by the conductivity.
It turns out that you can ask for an IPF.
しかしながら、第３図に示すように、初期添加剤濃度を
パラメータとして導電率（５℃）対IPFを求めた場合、
その特性曲線はS1〜S3に示すように初期添加剤濃度毎
（すなわち初期導電率毎）に異なるので、濃度毎に導電
率をIPFに変換するリニアライザを用意する必要があ
り、回路構成が複雑となる。However, as shown in FIG. 3, when the conductivity (5 ° C.) vs. IPF is obtained using the initial additive concentration as a parameter,
Since the characteristic curve is different for each initial additive concentration (that is, for each initial conductivity) as shown in S1 to S3, it is necessary to prepare a linearizer that converts the conductivity to IPF for each concentration, which complicates the circuit configuration. Become.
このような課題を解決するために本発明による氷量セン
サの信号処理方法は、溶液の導電率Ｇを測定し、その測
定した導電率Ｇを相対変化演算回路へ与え、この相対変
化演算回路にて、氷充填率が最大のときの導電率
Gspan，初期導電率をG0として表わされるｘ＝（Ｇ−
G0）／Gspanなる式から、相対導電率変化ｘを求め、こ
の相対導電率変化ｘによりIPFを求めるようにしたもの
である。In order to solve such a problem, the signal processing method of the ice amount sensor according to the present invention measures the electric conductivity G of the solution, gives the measured electric conductivity G to a relative change calculation circuit, and this relative change calculation circuit is supplied to this relative change calculation circuit. Conductivity at maximum ice filling rate
X represented G span, the initial conductivity as G 0 = (G-
The relative conductivity change x is obtained from the equation G 0 ) / G span, and the IPF is obtained from this relative conductivity change x.
本発明による方法においては、初期（氷量零）導電率が
違っても後段での処理が簡単となる。In the method according to the present invention, even if the initial (zero ice amount) conductivity is different, the subsequent treatment is simplified.
本発明による氷量センサの信号処理方法は相対導電率変
化ｘを使用するものである。相対導電率変化ｘは次式
（２）で表わされる。The signal processing method of the ice amount sensor according to the present invention uses the relative conductivity change x. The relative conductivity change x is expressed by the following equation (2).
ｘ＝（Ｇ−G0）／Gspan ・・・・（９） ここで、Ｇはある時点の溶液の導電率、G0は初期導電
率、GspanはIPFmaxのときの導電率である。G0とGspanは
既知であるので、Ｇにより（９）式から相対導電率変化
ｘを算出できる。相対導電率変化ｘは初期濃度がどんな
値でも、一意的にIPFと対応した値となる。従って、こ
の相対導電率変化ｘを使用すれば、初期導電率によらず
に氷量を知ることができる。相対導電率変化ｘとIPFと
の関係を第２図に示す。このように本方法においてはIP
F算出において溶液濃度の影響を受けない。x = (G−G 0 ) / G span ... (9) Here, G is the conductivity of the solution at a certain point, G 0 is the initial conductivity, and G span is the conductivity at IPF max. . Since G 0 and G span are known, the relative conductivity change x can be calculated from the equation (9) using G. The relative conductivity change x is a value that uniquely corresponds to the IPF regardless of the initial concentration. Therefore, by using this relative conductivity change x, the amount of ice can be known regardless of the initial conductivity. The relationship between relative conductivity change x and IPF is shown in FIG. Thus, in this method, IP
Solution calculation is not affected by solution concentration.
本発明による方法が適用される氷量検出システムを第１
図に示す。この氷量検出システムは、溶液の導電率を測
定する検出端１、この検出端１の出力信号を処理する信
号処理回路２、相対導電率変化を演算する相対変化演算
回路３およびIPFを演算するIPF演算回路４から構成され
る。第１図において、相対変化演算回路３とIPF演算回
路４を一緒にしてもよい。また、マイクロプロセッサな
どにより相対導電率変化に直さず直接IPF換算を行なっ
てもよい。First, an ice amount detection system to which the method according to the present invention is applied
Shown in the figure. This ice amount detection system calculates a detection end 1 for measuring the conductivity of a solution, a signal processing circuit 2 for processing an output signal of the detection end 1, a relative change calculation circuit 3 for calculating a relative conductivity change, and an IPF. It is composed of the IPF arithmetic circuit 4. In FIG. 1, the relative change calculation circuit 3 and the IPF calculation circuit 4 may be combined. In addition, the IPF conversion may be performed directly by the microprocessor or the like without correcting the change in the relative conductivity.
第１図において、検出端１は温度補正用の温度センサを
含んでおり、検出端１の出力は信号処理回路２において
或る一定温度における導電率の値に変換され、出力され
る。この値から（９）式により相対導電率変化ｘを求
め、そのまま出力するか、さらに第２図の特性曲線Ｓを
使用してIPFに換算して出力する。この際、出力を０〜1
00mV,4〜20mV,1〜5Vなど一般によく使用される出力レベ
ルと合わせておけば、市販の装置と簡単に接続できる。In FIG. 1, the detection end 1 includes a temperature sensor for temperature correction, and the output of the detection end 1 is converted into a conductivity value at a certain constant temperature in a signal processing circuit 2 and output. From this value, the relative electric conductivity change x is obtained from the equation (9) and output as it is, or further converted into IPF using the characteristic curve S of FIG. 2 and output. At this time, output 0 to 1
It can be easily connected to a commercially available device if it is combined with the commonly used output level such as 00mV, 4 to 20mV, 1 to 5V.
以上説明したように本発明は、相対導電率変化により氷
充填率を求めるようにしたことにより、初期導電率が違
っても一意的に氷充填率を求めることができるので、氷
量検出システムの構成を簡単なものとできる効果があ
る。As described above, according to the present invention, since the ice filling rate is obtained by the change in the relative electrical conductivity, the ice filling rate can be uniquely obtained even if the initial electrical conductivity is different. This has the effect of simplifying the structure.
第１図は本発明による方法が適用される氷量検出システ
ムを示す系統図、第２図は相対導電率変化対IPFの関係
を示すグラフ、第３図は導電率対IPFの関係を示すグラ
フである。 １…検出端、２…信号処理回路、３…相対変化演算回
路、４…IPF演算回路。FIG. 1 is a system diagram showing an ice amount detection system to which the method according to the present invention is applied, FIG. 2 is a graph showing the relationship between relative conductivity change and IPF, and FIG. 3 is a graph showing the relationship between conductivity and IPF. Is. 1 ... Detection end, 2 ... Signal processing circuit, 3 ... Relative change calculation circuit, 4 ... IPF calculation circuit.
フロントページの続き (72)発明者 枝川 靖典 愛知県名古屋市中区錦１丁目18番22号 株 式会社竹中工務店名古屋支店内 (72)発明者 井坂 英毅 神奈川県伊勢原市鈴川54番地 山武ハネウ エル株式会社伊勢原工場内 (72)発明者 川井 健司 神奈川県藤沢市川名１丁目12番２号 山武 ハネウエル株式会社藤沢工場内 (72)発明者 伊藤 昭彦 神奈川県伊勢原市鈴川54番地 山武ハネウ エル株式会社伊勢原工場内 (56)参考文献 特開 昭63−195551（ＪＰ，Ａ)Front page continuation (72) Inventor Yasunori Edakawa 1-18-22 Nishiki, Naka-ku, Nagoya-shi, Aichi Incorporated company Takenaka Corporation Nagoya Branch (72) Inventor Hideki Isaka 54 Suzukawa, Isehara, Kanagawa Yamatake Hanuel Inside the Isehara Factory (72) Kenji Kawai 1-12-2 Kawana, Fujisawa-shi, Kanagawa Yamatake Honeywell Co., Ltd. Inside the Fujisawa Factory (72) Akihiko Ito 54 Suzukawa, Isehara, Kanagawa Prefecture Yamatake Honeywell Co., Ltd. In the factory (56) Reference JP-A-63-195551 (JP, A)
Claims (1)
電率Ｇを相対変化演算回路へ与え、この相対変化演算回
路にて、氷充填率が最大のときの導電率をGspan，初期
導電率をG0として表わされるｘ＝（Ｇ−G0）／Gspanな
る式から、相対導電率変化ｘを求め、この相対導電率変
化ｘにより氷充填率を求めることを特徴とする氷量セン
サの信号処理方法。1. A conductivity G of a solution is measured, and the measured conductivity G is applied to a relative change calculation circuit. In this relative change calculation circuit, the conductivity when the ice filling rate is maximum is G span , An ice characterized in that a relative conductivity change x is obtained from an expression x = (G−G 0 ) / G span expressed as an initial conductivity G 0 , and an ice filling rate is obtained from this relative conductivity change x. Signal processing method of quantity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63127164A JPH06105231B2 (en) | 1988-05-26 | 1988-05-26 | Signal processing method of ice amount sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63127164A JPH06105231B2 (en) | 1988-05-26 | 1988-05-26 | Signal processing method of ice amount sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01297547A JPH01297547A (en) | 1989-11-30 |
| JPH06105231B2 true JPH06105231B2 (en) | 1994-12-21 |
Family
ID=14953234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63127164A Expired - Lifetime JPH06105231B2 (en) | 1988-05-26 | 1988-05-26 | Signal processing method of ice amount sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06105231B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4608612B2 (en) * | 2003-08-26 | 2011-01-12 | 公立大学法人高知工科大学 | Method and apparatus for measuring iron sulfide content in solid components |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0684943B2 (en) * | 1987-02-10 | 1994-10-26 | 日本鋼管株式会社 | Method for measuring the rate of freezing in the ice storage tank |
-
1988
- 1988-05-26 JP JP63127164A patent/JPH06105231B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01297547A (en) | 1989-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Abdellaoui et al. | Use of Meteosat for mapping thermal inertia and evapotranspiration over a limited region of Mali | |
| JP2005502894A (en) | Calculation method of temporal filling state signal | |
| JPH08262073A (en) | Method and apparatus for measuring power factor | |
| JPH01297547A (en) | Signal processing method for ice quantity sensor | |
| JP2850514B2 (en) | PH meter with life expectancy display | |
| JP2801124B2 (en) | Correction method for zero error of torque sensor | |
| JPS5653412A (en) | Fuel gauge | |
| JPS61273130A (en) | State estimate system of power system | |
| Eriksson | Determination of hydrofluoric acid in strong acid solutions such as stainless steel pickling baths with a lanthanum fluoride electrode and a permaplex membrane electrode | |
| JP2663469B2 (en) | Electronic balance | |
| JP2714812B2 (en) | Boiling point detection method | |
| JPH0588406B2 (en) | ||
| JPH067365Y2 (en) | Coal yard sprinkling control device | |
| JPS6319831B2 (en) | ||
| JP3687253B2 (en) | Seismic device | |
| JP2523608B2 (en) | Phase difference detection method in AC applied polarization reaction | |
| JPS6418033A (en) | Data corrector for thermocouple | |
| JPS6367132B2 (en) | ||
| JPH01195370A (en) | Electric energy arithmetic unit | |
| SU781755A1 (en) | Time shift measuring device | |
| JPH0572000B2 (en) | ||
| JPS5833529Y2 (en) | Measured value correction method | |
| JPH0232060U (en) | ||
| JP2585518B2 (en) | Motor load torque estimation device | |
| JPH06265564A (en) | Gas flow velocity detector |