JPH06337255A - Ice accretion detector - Google Patents
Ice accretion detectorInfo
- Publication number
- JPH06337255A JPH06337255A JP12674993A JP12674993A JPH06337255A JP H06337255 A JPH06337255 A JP H06337255A JP 12674993 A JP12674993 A JP 12674993A JP 12674993 A JP12674993 A JP 12674993A JP H06337255 A JPH06337255 A JP H06337255A
- Authority
- JP
- Japan
- Prior art keywords
- icing
- ice accretion
- electrodes
- detection
- ice
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、着氷検出装置に関し、
特にヘリコプタのウインドウやブレードのような回転部
等の着氷量を検出し、この検出データに基づいて、解氷
用ヒータの発熱量を適切にコントロールする場合に適用
して有用なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an icing detection device,
In particular, it is useful when applied to the case where the amount of ice accretion on a rotating part such as a window or blade of a helicopter is detected, and the heat generation amount of the thawer for defrosting is appropriately controlled based on the detected data.
【０００２】[0002]
【従来の技術】図４は、従来技術に係る着氷検出装置を
示す説明図である。同図に示すように本着氷検出装置
は、検出部７と、着氷検出制御装置１３とを備えてい
る。更に検出部７は、容器８、着氷検出用振動プローブ
９、ドライブコイル１０、ピックアップコイル１１及び
ターミナルボックス１２を備えている。2. Description of the Related Art FIG. 4 is an explanatory view showing an ice accretion detecting device according to a prior art. As shown in the figure, the present icing detection device includes a detection unit 7 and an icing detection control device 13. Further, the detection unit 7 includes a container 8, a vibration probe 9 for ice accretion detection, a drive coil 10, a pickup coil 11, and a terminal box 12.
【０００３】これらのうち容器８は、着氷検出対象部に
固定される立方体の容器であって、図中上下方向に仕切
られ、外気が図中の手前から奥に向かって通り抜けるよ
う開放された開放部８ａと、ドライブコイル１０等が設
けられたコイル部８ｂとに分かれている。なおコイル部
８ｂは、実際にはメクラブタによって閉じられている
が、図３では、説明のためこのメクラブタを省略してい
る。また容器８の側面には、ターミナルボックス１２が
設けられている。Of these, the container 8 is a cubic container which is fixed to the object of ice accretion detection and is partitioned in the vertical direction in the figure, and is opened so that the outside air can pass from the front to the back in the figure. It is divided into an open portion 8a and a coil portion 8b provided with the drive coil 10 and the like. Although the coil portion 8b is actually closed by a mechanical club, the mechanical club is omitted in FIG. 3 for the sake of explanation. A terminal box 12 is provided on the side surface of the container 8.
【０００４】着氷検出用振動プローブ９は、容器８内に
設けられた棒状の部材であって、容器８内の仕切りを貫
通し、その上部が開放部８ａ内に占位し、下部がコイル
部８ｂ内に占位するよう設けられている。ドライブコイ
ル１０及びピックアップコイル１１は、着氷検出用プロ
ーブ９の前記下部の外周部に各々設けられている。着氷
検出制御装置１３は、ターミナルボックス１２を介して
ドライブコイル１０及びピックアップコイル１１に接続
されており、内部にはドライブコイル１０に交流電流を
流し、これを励磁するための励磁回路と、ピックアップ
コイル１１に生起する交流電流から着氷検出用振動プロ
ーブ９の振動周波数を検出するための検出回路とを有し
ている。The vibration probe 9 for ice accretion detection is a rod-shaped member provided in the container 8, penetrates a partition in the container 8, its upper part is occupied in the open part 8a, and its lower part is a coil. It is provided to occupy the inside of the portion 8b. The drive coil 10 and the pickup coil 11 are provided on the outer peripheral portion of the lower portion of the icing detection probe 9, respectively. The ice accretion detection control device 13 is connected to the drive coil 10 and the pickup coil 11 via a terminal box 12, and an alternating current is passed through the drive coil 10 to excite the drive coil 10 and a pickup circuit. It has a detection circuit for detecting the vibration frequency of the vibration probe 9 for ice accretion detection from the alternating current generated in the coil 11.
【０００５】上記着氷検出装置によれば、着氷検出制御
装置１３の励磁回路によってドライブコイル１０が励磁
されると、着氷検出用振動プローブ９が次の数１式に示
す振動周波数ｆ（通常４０KHZ ）で振動する。According to the ice accretion detection device, when the drive coil 10 is excited by the excitation circuit of the ice accretion detection control device 13, the vibration probe 9 for ice accretion detection has a vibration frequency f ( usually it oscillates at 40KH Z).
【０００６】[0006]
【数１】 ただし ｍ：着氷検出用振動プローブ９の質量 ｓ：着氷検出用振動プローブの曲けスティフネス[Equation 1] However, m: mass of the vibration probe 9 for ice accretion detection s: bending stiffness of the vibration probe for ice accretion detection
【０００７】その結果ピックアップコイル１１と着氷検
出制御装置１３の検出回路とによって前記振動周波数ｆ
が検出される。As a result, the vibration frequency f is detected by the pickup coil 11 and the detection circuit of the ice accretion detection control device 13.
Is detected.
【０００８】次に上記において、着氷検出用振動プロー
ブ９に空気中の水蒸気等が着氷した場合には、この着氷
部の質量α分だけ着氷検出用振動プローブ９の実質的な
質量が増加することになり、このときの着氷検出用振動
プローブ９の振動周波数ｆiは、次の数２式に示すよう
に、前記振動周波数ｆよりも減少する。従ってこのとき
のピックアップコイル１１と着氷検出制御装置１３の検
出回路とによる検出値は、前記振動周波数ｆi となる。
そこでこの振動周波数ｆi が規定値以下の値となった場
合にヘリコプタのウインド等が着氷状態であると判断す
る。Next, in the above, when water vapor or the like in the air is iced on the icing detection vibration probe 9, the substantial mass of the icing detection vibration probe 9 is equal to the mass α of the icing portion. Is increased, and the vibration frequency f i of the vibration probe 9 for ice accretion detection at this time is lower than the vibration frequency f as shown in the following equation (2). Therefore, the detection value by the pickup coil 11 and the detection circuit of the ice accretion detection control device 13 at this time becomes the vibration frequency f i .
Therefore, when the vibration frequency f i becomes a value equal to or less than the specified value, it is determined that the helicopter window or the like is in an icing state.
【０００９】[0009]
【数２】 [Equation 2]
【００１０】[0010]
【発明が解決しようとする課題】しかしながら上述の如
き従来技術に係る着氷検出装置では、上述のようにドラ
イブコイル１０を励磁するための励磁回路が必要であ
り、またこの励磁回路用のケーブルを機体内に配線する
必要があるため、この励磁回路及びケーブルが他の機器
に対する電磁干渉となって、悪影響を与える虞がある。
このため前記励磁回路を有する着氷検出制御装置１３の
設置や前記ケーブルの選定及び配線には、十分な注意を
払う必要があり、これらの作業に手間がかかる。However, the icing detection device according to the prior art as described above requires the excitation circuit for exciting the drive coil 10 as described above, and the cable for this excitation circuit is used. Since it is necessary to wire inside the machine body, the exciting circuit and the cable may cause electromagnetic interference with other devices and adversely affect them.
Therefore, it is necessary to pay sufficient attention to the installation of the ice accretion detection control device 13 having the excitation circuit, the selection and wiring of the cables, and these operations are troublesome.
【００１１】また着氷による着氷検出用振動プローブ９
の振動周波数の変化によって、着氷の有無を検出する方
式であるため、計測範囲が限定され、このため不便をし
いられている。A vibration probe 9 for ice accretion detection by ice accretion.
Since it is a method of detecting the presence or absence of icing by the change of the vibration frequency, the measurement range is limited, which is inconvenient.
【００１２】本発明は、上記従来技術に鑑み、他の機器
に悪影響を与えることなく、定量的に着氷量を検出する
ことができる着氷検出装置を提供することを目的とす
る。In view of the above-mentioned conventional technique, it is an object of the present invention to provide an icing detection device capable of quantitatively detecting the icing amount without adversely affecting other devices.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成する本発
明の構成は、着氷検出対象部に、所定の間隔をおいて互
いに平行となるよう設置される１対の電極と、該１対の
電極に接続され、この電極に空気中の水蒸気等が着氷し
た際、この電極間の静電容量を検出し、この検出した静
電容量に基づいて、前記着氷部の厚さを求める着氷解析
装置とを備えたことを特徴とする。The structure of the present invention which achieves the above-mentioned object is a pair of electrodes installed in a portion to be detected for icing so as to be parallel to each other at a predetermined interval, and the pair of electrodes. When water vapor or the like in the air is iced on this electrode, the capacitance between the electrodes is detected, and the thickness of the icing part is obtained based on the detected capacitance. An icing analysis device is provided.
【００１４】[0014]
【作用】上記構成の本発明によれば、電極に空気中の水
蒸気等が着氷すると、この着氷部の厚さに応じて、この
電極間の静電容量が変化する。そこで着氷解析装置がこ
のときの静電容量を検出し、この検出した静電容量に基
づいて、前記着氷部の厚さを求める。According to the present invention having the above-mentioned structure, when water vapor or the like in the air is iced on the electrodes, the capacitance between the electrodes changes according to the thickness of the icing portion. Therefore, the icing analysis device detects the electrostatic capacitance at this time, and based on the detected electrostatic capacitance, obtains the thickness of the icing portion.
【００１５】[0015]
【実施例】以下本発明の実施例を図面に基づき詳細に説
明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１６】図１は、本発明の実施例に係る着氷検出装
置を示す説明図、図２は、図１の電極部分を抽出して示
す説明図である。FIG. 1 is an explanatory view showing an ice accretion detecting apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing an electrode portion extracted from FIG.
【００１７】図１に示すように本着氷検出装置は、検出
部１と、着氷解析装置６とを備えている。更に検出部１
は、容器２、１対の電極３ａ，３ｂ及びターミナルボッ
クス４を備えている。As shown in FIG. 1, the present icing detection device comprises a detection unit 1 and an icing analysis device 6. Furthermore, the detection unit 1
Includes a container 2, a pair of electrodes 3a and 3b, and a terminal box 4.
【００１８】これらのうち容器２は、着氷検出対象部に
固定される立方体の容器であって、外気が図中の手前か
ら奥に向って通り抜けるよう開放されている。また容器
２の側面には、ターミナルボックス４が設けられてい
る。Of these, the container 2 is a cubic container that is fixed to the ice accretion detection target portion, and is open so that outside air can pass from the front to the back in the figure. A terminal box 4 is provided on the side surface of the container 2.
【００１９】１対の電極３ａ，３ｂは、円柱状であっ
て、容器２内に所定の間隔ｄ0 （図２参照）をおいて互
いに平行となるよう固定されている。着氷解析装置６
は、ターミナルボックス４を介して電極３ａ，３ｂに接
続されている。この着氷解析装置６は、電極３ａ，３ｂ
間の静電容量を検出し、この検出した静電容量から着氷
部５の厚さを求めるものである。次にこの詳細を説明す
る。The pair of electrodes 3a, 3b are cylindrical and are fixed in the container 2 so as to be parallel to each other with a predetermined distance d 0 (see FIG. 2). Ice accumulator 6
Are connected to the electrodes 3a and 3b via the terminal box 4. This icing analysis device 6 includes electrodes 3a and 3b.
The electrostatic capacitance between them is detected, and the thickness of the icing part 5 is obtained from the detected electrostatic capacitance. The details will be described below.
【００２０】一般に図３に示すような２本の平行円柱導
体１４，１５間の静電容量ｃは、次の数３式のように表
わされる。Generally, the electrostatic capacitance c between the two parallel columnar conductors 14 and 15 as shown in FIG. 3 is expressed by the following equation (3).
【００２１】[0021]
【数３】 ただし、ε：円柱導体１４，１５間の誘電率 ｄ：円柱導体１４，１５間の距離 ａ：円柱導体１４の外径 ｂ：円柱導体１５の外径[Equation 3] However, ε: dielectric constant between the cylindrical conductors 14 and 15 d: distance between the cylindrical conductors 14 and 15 a: outer diameter of the cylindrical conductor 14 b: outer diameter of the cylindrical conductor 15
【００２２】そこで図２に示すように、電極３ａ，３ｂ
の外径を何れもａ、電極３ａ，３ｂ間の距離をｄ0 、電
極３ａ，３ｂ間の誘電率である空気の誘電率をε2 とす
ると、電極３ａ，３ｂ間の静電容量ｃ1 は、次の数４式
で表わされる。Therefore, as shown in FIG. 2, the electrodes 3a and 3b are provided.
Where a is the outer diameter of each electrode, d 0 is the distance between the electrodes 3 a and 3 b, and ε 2 is the dielectric constant of air, which is the dielectric constant between the electrodes 3 a and 3 b, the capacitance c 1 between the electrodes 3 a and 3 b is Is expressed by the following equation 4.
【００２３】[0023]
【数４】 [Equation 4]
【００２４】ここで更に、図２に示すように着氷部５の
厚さをｄ1 、氷の誘電率をε1 とすると、このときの電
極３ａ，３ｂ間の静電容量ｃ2 は、次の数５式で表わさ
れる。Assuming that the thickness of the ice accretion portion 5 is d 1 and the permittivity of ice is ε 1 as shown in FIG. 2, the electrostatic capacitance c 2 between the electrodes 3a and 3b at this time is It is expressed by the following equation (5).
【００２５】[0025]
【数５】 ただし、ｄ2 ：着氷部５の厚さ２ｄ1 を除いた電極３
ａ，３ｂ間の距離[Equation 5] However, d 2 : the electrode 3 excluding the thickness 2d 1 of the icing part 5
Distance between a and 3b
【００２６】従って電極３ａ，３ｂ間の距離ｄ0 が既知
の値であり、ｄ2 ＝ｄ0 −２ｄ1 であるから、残る静電
容量ｃ2 の値が判明すれば、着氷部５の厚さｄ1 を知る
ことができる。すなわち着氷解析装置６は、この静電容
量ｃ2 を検出し、この検出データに基づき、数５式から
着氷部５の厚さｄ1 を求めるものである。Therefore, since the distance d 0 between the electrodes 3a and 3b is a known value and d 2 = d 0 -2d 1 , if the value of the remaining capacitance c 2 is known, the ice accretion portion 5 It is possible to know the thickness d 1 . That is, the icing analysis device 6 detects this electrostatic capacitance c 2 and obtains the thickness d 1 of the icing part 5 from the equation 5 based on this detection data.
【００２７】[0027]
【発明の効果】以上実施例とともに具体的に説明したよ
うに、本発明によれば、従来技術のように電磁干渉によ
って他の機器に悪影響を与える虞がないため、装置の設
置が容易であり、しかも着氷部の厚さを定量的に検出す
ることができるため、解氷用ヒータの適切な発熱量コン
トロールに資することができる。As described above in detail with reference to the embodiments, according to the present invention, there is no possibility of adversely affecting other devices by electromagnetic interference unlike the prior art, so that the apparatus can be easily installed. Moreover, since the thickness of the ice accretion portion can be quantitatively detected, it is possible to contribute to appropriate control of the heat generation amount of the ice-breaking heater.
【図１】本発明の実施例に係る着氷検出装置を示す説明
図である。FIG. 1 is an explanatory diagram showing an icing detection device according to an embodiment of the present invention.
【図２】本発明の実施例に係る着氷検出装置の電極部分
を抽出して示す説明図である。FIG. 2 is an explanatory diagram showing an extracted electrode portion of the icing detection device according to the embodiment of the present invention.
【図３】一般的な平行円柱導体間の静電容量を説明する
ための説明図である。FIG. 3 is an explanatory diagram for explaining a capacitance between common parallel cylindrical conductors.
【図４】従来技術に係る着氷検出装置を示す説明図であ
る。FIG. 4 is an explanatory view showing an ice accretion detecting device according to a conventional technique.
３ａ，３ｂ 電極 ５ 着氷部 ６ 着氷解析装置 3a, 3b electrode 5 icing part 6 icing analyzer
Claims (1)
互いに平行となるよう設置される１対の電極と、 該１対の電極に接続され、この電極に空気中の水蒸気等
が着氷した際、この電極間の静電容量を検出し、この検
出した静電容量に基づいて、前記着氷部の厚さを求める
着氷解析装置とを備えたことを特徴とする着氷検出装
置。1. A pair of electrodes installed in the ice accretion detection target portion so as to be parallel to each other at a predetermined interval, and connected to the pair of electrodes, water vapor or the like in the air being connected to the electrodes. When icing is performed, an electrostatic capacitance between the electrodes is detected, and an icing analysis device for determining the thickness of the icing portion based on the detected electrostatic capacitance is provided. Detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12674993A JPH06337255A (en) | 1993-05-28 | 1993-05-28 | Ice accretion detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12674993A JPH06337255A (en) | 1993-05-28 | 1993-05-28 | Ice accretion detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06337255A true JPH06337255A (en) | 1994-12-06 |
Family
ID=14942965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12674993A Withdrawn JPH06337255A (en) | 1993-05-28 | 1993-05-28 | Ice accretion detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06337255A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086391A3 (en) * | 2007-01-10 | 2008-08-28 | Sikorsky Aircraft Corp | Ice rate meter with virtual aspiration |
| CN103900459A (en) * | 2014-04-10 | 2014-07-02 | 运城学院 | Automatic detection device for saline solution crystallization thickness |
| CN109405881A (en) * | 2018-10-30 | 2019-03-01 | 重庆理工大学 | Device for monitoring icing of electric transmission line based on ice sheet dielectric property and rotated conductors |
| WO2021101465A1 (en) * | 2019-11-22 | 2021-05-27 | Koc Universitesi | An apparatus and a method for monitoring accretion of ice and deicing |
| CN110567360B (en) * | 2018-06-06 | 2021-07-23 | 宏碁股份有限公司 | Three-dimensional scanning system |
-
1993
- 1993-05-28 JP JP12674993A patent/JPH06337255A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086391A3 (en) * | 2007-01-10 | 2008-08-28 | Sikorsky Aircraft Corp | Ice rate meter with virtual aspiration |
| CN103900459A (en) * | 2014-04-10 | 2014-07-02 | 运城学院 | Automatic detection device for saline solution crystallization thickness |
| CN110567360B (en) * | 2018-06-06 | 2021-07-23 | 宏碁股份有限公司 | Three-dimensional scanning system |
| CN109405881A (en) * | 2018-10-30 | 2019-03-01 | 重庆理工大学 | Device for monitoring icing of electric transmission line based on ice sheet dielectric property and rotated conductors |
| WO2021101465A1 (en) * | 2019-11-22 | 2021-05-27 | Koc Universitesi | An apparatus and a method for monitoring accretion of ice and deicing |
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| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000801 |