JPH0473756B2 - - Google Patents
Info
- Publication number
- JPH0473756B2 JPH0473756B2 JP62067351A JP6735187A JPH0473756B2 JP H0473756 B2 JPH0473756 B2 JP H0473756B2 JP 62067351 A JP62067351 A JP 62067351A JP 6735187 A JP6735187 A JP 6735187A JP H0473756 B2 JPH0473756 B2 JP H0473756B2
- Authority
- JP
- Japan
- Prior art keywords
- distance
- cargo
- hold
- antenna
- detection device
- 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
- 238000001514 detection method Methods 0.000 claims description 36
- 239000004793 Polystyrene Substances 0.000 claims description 12
- 229920002223 polystyrene Polymers 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電磁波を空中線を介して送出し、測
定対象物から反射電磁波を検出することによつ
て、測定対象物までの距離を測定する距離検出装
置を応用した連続アンローダの対船倉底間距離検
出装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention measures the distance to a measurement target by transmitting electromagnetic waves through an antenna and detecting reflected electromagnetic waves from the measurement target. This invention relates to a distance detection device for a continuous unloader using a distance detection device from the bottom of a ship's hold.
船倉に積載された土砂、コークス等の積荷を荷
役岸壁に荷揚げするものとして、バケツトエレベ
ータ型連続アンローダを用いることは広く知られ
ている。この連続アンローダは、荷揚作業に先立
ち積荷の存在する船倉内に装入され、その昇降俯
仰動作とバケツトエレベータの循環回走により積
荷を連続的に荷揚げすることができる。しかしな
がら、荷揚作業時において、バケツトエレベータ
の下端部は常に船倉底に向けられ、積荷の層の低
下と共に下降していくため、積荷の層が薄くなる
と、バケツトエレベータの下端部が船倉底と衝突
してしまうおそれがある。そのため、相互接触・
衝突に起因する事故を防止するために、従来、荷
揚作業前に作業員が船倉内に入り、積荷の層の厚
みを常時監視するのが普通である。
It is widely known that a bucket elevator type continuous unloader is used to unload cargo such as earth and sand, coke, etc. loaded in a ship's hold onto a cargo handling quay. This continuous unloader is loaded into a cargo hold prior to unloading work, and can unload the cargo continuously by raising and lowering the cargo and by circulating the bucket elevator. However, during unloading operations, the lower end of the bucket elevator is always directed towards the bottom of the hold, and it descends as the layer of cargo decreases. There is a risk of collision. Therefore, mutual contact and
In order to prevent accidents caused by collisions, it is common practice for workers to enter the cargo hold and constantly monitor the thickness of the cargo layer before unloading operations.
一方、バケツトエレベータ下端部に磁気セン
サ、あるいは、機械センサを備えた距離検出装置
を取り付け、この距離検出装置を用いて測定作業
を自動的に行なうことも知られている。磁気セン
サを備えた距離検出装置は、船倉底に対向して設
けた検出コイルの磁束変化が、船倉底に近づくに
つれて増大する作用を利用して、対船倉底間距離
を検出するものである。（特開昭58−207224）。ま
た、機械式センサを備えた距離検出装置は、バケ
ツトエレベータ下端部に昇降移動可能に取り付け
た検出杆により対船倉底間距離を監視し、危険距
離に達したときに警報信号を出力するというもの
である（実開昭61−151931、実開昭53−37182）。 On the other hand, it is also known to attach a distance detection device equipped with a magnetic sensor or a mechanical sensor to the lower end of a bucket elevator, and to automatically perform measurement work using this distance detection device. A distance detection device equipped with a magnetic sensor detects the distance between the bottom of a ship's hold and the bottom of a ship's hold by utilizing the effect that the change in magnetic flux of a detection coil provided opposite to the bottom of the ship's hold increases as the distance approaches the bottom of the hold. (Japanese Patent Application Laid-Open No. 58-207224). In addition, the distance detection device equipped with a mechanical sensor monitors the distance from the bottom of the cargo hold using a detection rod attached to the bottom end of the bucket elevator so that it can move up and down, and outputs a warning signal when a dangerous distance is reached. (Utility Model Kai 61-151931, Utility Model Kai 53-37182).
しかしながら、従来の距離検出装置を用いた場
合、以下の問題点及び欠点が指摘される。
However, when using the conventional distance detection device, the following problems and drawbacks are pointed out.
磁気センサを備えた距離検出装置には、検出距
離が短いため、アンローダのように、比較的広い
範囲にわたつて、距離を検出する必要がある場合
には不向きであるという欠点があたつた。機械セ
ンサを備えた距離検出装置は、積荷に対して検出
杆を挿入する必要があるため、検出杆の耐久性の
問題、及び検出杆と船倉底との接触により、船倉
底の破損等の問題があつた。 Distance detection devices equipped with magnetic sensors have a short detection distance, so they are unsuitable for applications where it is necessary to detect distance over a relatively wide range, such as in unloaders. Distance detection devices equipped with mechanical sensors require the detection rod to be inserted into the cargo, resulting in problems with the durability of the detection rod and damage to the bottom of the hold due to contact between the detection rod and the bottom of the hold. It was hot.
そこで、本発明の目的は、上記問題点及び欠点
に鑑み、作業能率の向上が図れ、検出距離が長
く、かつ高い信頼性を持ち、実用性の高い距離検
出装置を提供することである。 SUMMARY OF THE INVENTION In view of the above-mentioned problems and drawbacks, an object of the present invention is to provide a highly practical distance detection device that can improve work efficiency, has a long detection distance, has high reliability, and is highly practical.
即ち、測定対象物、即ち船倉底との間に介在す
る積荷の表面反射に影響されない連続式アンロー
ダの対船倉底間距離検出装置を提供することであ
る。 That is, it is an object of the present invention to provide an apparatus for detecting the distance between a continuous unloader and the bottom of a ship's hold, which is not affected by the surface reflection of the cargo interposed between the object to be measured, that is, the bottom of the ship's hold.
本発明によれば、バケツトエレベータを用いて
船倉底上に載置された積荷を搬出する連続アンロ
ーダの対船倉底間距離検出装置において、前記積
荷に接触し、前記船倉底に対し輻射方向が指向す
るように、前記バケツトエレベータの下端部に取
り付けられた空中線と、該空中線を介して電磁波
を送出し、前記船倉底から反射電磁波を検出する
ことによつて、該船倉底までの距離を測定するセ
ンサ部とを有し、前記空中線は、金属導波管と、
該導波管から延在するポリスチレンから成るロツ
ドとを有することを特徴とする連続アンローダの
対船倉底間距離検出装置が得られる。
According to the present invention, in the distance detection device for a continuous unloader that uses a bucket elevator to unload a cargo placed on the bottom of a cargo hold, the device contacts the cargo and the radiation direction is directed to the bottom of the cargo hold. An antenna attached to the lower end of the bucket elevator is used to direct the antenna to the bottom of the cargo hold, and by transmitting electromagnetic waves through the antenna and detecting reflected electromagnetic waves from the bottom of the cargo hold, the distance to the bottom of the cargo hold can be determined. a sensor section for measuring, and the antenna includes a metal waveguide;
There is obtained a distance detecting device for a continuous unloader from the bottom of a ship's hold, characterized in that it has a rod made of polystyrene extending from the waveguide.
以下、本発明で使用される距離検出装置の原理
的な構成及び動作を第４図及び第５図を参照して
説明する。
Hereinafter, the basic structure and operation of the distance detection device used in the present invention will be explained with reference to FIGS. 4 and 5.
第４図の概略構成図に示すとおり、この種の距
離検出装置は、搬送波に所定の変調を施す変調部
４０と、変調部４０の出力信号（変調波とする）
を所定の電力値に増幅する送信増幅部４１を有す
る。送信増幅部４１の出力信号（送信波）は、一
定方向のみの信号を通過させるサーキユレータ４
２に導かれ、空中線４３を介して外部に電磁波の
形で送出される。サーキユレータ４２は、方向性
結合器に代替されてもよい。 As shown in the schematic configuration diagram of FIG. 4, this type of distance detecting device includes a modulation section 40 that performs predetermined modulation on a carrier wave, and an output signal (defined as a modulated wave) of the modulation section 40.
It has a transmission amplification section 41 that amplifies the power to a predetermined power value. The output signal (transmission wave) of the transmission amplification section 41 is passed through a circulator 4 that allows signals to pass only in a certain direction.
2 and is sent out via the antenna 43 in the form of electromagnetic waves. The circulator 42 may be replaced by a directional coupler.
一方、送出された電磁波は、測定対象物で反射
され、この反射された電磁波は、前記空中線４３
で抽出されて送信電力に変換され、サーキユレー
タ４２を介して受信増幅部４３に導かれる。受信
増幅部４３では、この微弱な受信電力が適当な値
まで増幅される。増幅された受信電力は、復調部
４４に導かれ、ここで原信号、即ち、前記変調波
成分（復調波とする）に復調される。空中線４３
以外の部分はセンサ部４と呼ばれてもよい。 On the other hand, the transmitted electromagnetic waves are reflected by the object to be measured, and the reflected electromagnetic waves are transmitted to the antenna 43.
The signal is extracted and converted into transmission power, and guided to the reception amplification section 43 via the circulator 42. In the reception amplification section 43, this weak reception power is amplified to an appropriate value. The amplified received power is guided to the demodulation section 44, where it is demodulated into the original signal, that is, the modulated wave component (referred to as a demodulated wave). aerial line 43
The other portions may be referred to as the sensor section 4.
ところで、電磁波は、一定速度で伝搬するか
ら、前記変調波と復調波との間には、伝搬距離に
対応した時間差を生じており、この時間差を検出
することにより、測定対象物までの距離を測定で
きる。 By the way, since electromagnetic waves propagate at a constant speed, there is a time difference between the modulated wave and demodulated wave that corresponds to the propagation distance, and by detecting this time difference, the distance to the object to be measured can be determined. Can be measured.
通常用いられる電磁波を連続的に送信する連続
波レーダ式距離検出装置における変復調波の特性
関係図を第５図に示している。第５図は、例え
ば、4GHz帯程度の搬送波を、その波長が最高測
定距離より長いかあるいは同程度の三角波で周波
数変調した場合の特性図である。位相変調した場
合も同様の特性図を形成することはもちろんであ
る。第５図からわかるように、変復調波間には、
電磁波の伝搬距離に対応した周波数ビートΔfが
生じている。このΔfと測定対象物までの距離ｈ
との間には次式の関係式が成立している。 FIG. 5 shows a characteristic diagram of modulation/demodulation waves in a commonly used continuous wave radar type distance detection device that continuously transmits electromagnetic waves. FIG. 5 is a characteristic diagram when, for example, a carrier wave in the 4 GHz band is frequency-modulated with a triangular wave whose wavelength is longer than or about the same as the maximum measurement distance. Of course, a similar characteristic diagram can be formed when phase modulation is performed. As can be seen from Figure 5, between the modulation and demodulation waves,
A frequency beat Δf corresponding to the propagation distance of the electromagnetic wave occurs. This Δf and the distance h to the object to be measured
The following relational expression holds true between .
Δf＝４・fm・Ｂ／ｖ・ｈ ……
但しfm：変調繰り返し周波数
Ｂ：周波数偏移
ｖ：電磁波の媒質中の伝搬速度
式を変形すると、
ｈ＝ｖ／４・fm・Ｂ・Δf ……
従つてこのΔfを検出することによつて測定対象
物までの距離を測定することができる。 Δf=4・fm・B/v・h... However, fm: Modulation repetition frequency B: Frequency deviation v: Propagation speed of electromagnetic wave in the medium When the equation is modified, h=v/4・fm・B・Δf... ... Therefore, by detecting this Δf, the distance to the object to be measured can be measured.
尚、第５図に示すとおり変調波の任意の一点の
偏移時間ｔを検出しても距離の検出ができる。こ
れは、
ｔ＝２・ｈ／ｖ ……
ｈ＝ｔ・ｖ／２ ……
の関係式が成立することに基づく。 Incidentally, as shown in FIG. 5, the distance can also be detected by detecting the shift time t of any one point of the modulated wave. This is based on the fact that the following relational expression holds true: t=2.h/v...h=t.v/2...
次、本発明の一実施例を第１図乃至第４図を参
照して説明する。 Next, one embodiment of the present invention will be described with reference to FIGS. 1 to 4.
本発明の第１実施例に係る距離検出装置はアン
ローダの対船倉底間距離を測定するのに適した空
中線４３（第４図）を備えている。 The distance detection device according to the first embodiment of the present invention is equipped with an antenna 43 (FIG. 4) suitable for measuring the distance between the unloader and the bottom of the ship's hold.
第１図ａを参照すると、本発明の一実施例にお
ける空中線は高周波電力を供給する同軸ケーブル
給電線１４と、一端は開口され、他端は、結合さ
れた前記給電線１４の芯線から所定の距離を隔て
て短絡された円形金属管導波管１１と、前記開口
された一端から延在するポリスチレンロツド１３
を有している。円形金属管導波管１１は、前記給
電線１４と前記ポリスチレンロツド１３とのイン
ピーダンス整合がとれる形状を有し、具体的に
は、第１図ａ内に示した管内波長λg、自由空間
波長λに基づいて定められる。円形金属管導波管
１１の側部には、前記インピーダンス整合を補助
する同調スタブ１０が設けられている。ポリスチ
レンロツド１３は、前記円形金属管導波管１１の
開放端から延在方向に6λの長さを有し、その径
は、前記開放端から3λの長さまでは0.5λから0.3λ
へテーパ状に細まり、その後は0.3λの径を有する
円形ロツドである。ここにλは、搬送波の自由空
間波長である。 Referring to FIG. 1a, the antenna in one embodiment of the present invention is connected to a coaxial cable feed line 14 that supplies high frequency power, one end of which is open, and the other end of which is connected to a predetermined distance from the core wire of the coupled feed line 14. A circular metal tube waveguide 11 short-circuited at a distance, and a polystyrene rod 13 extending from the open end.
have. The circular metal tube waveguide 11 has a shape that allows impedance matching between the feed line 14 and the polystyrene rod 13, and specifically, the tube wavelength λg and the free space wavelength shown in FIG. It is determined based on λ. A tuning stub 10 is provided on the side of the circular metal tube waveguide 11 to assist in the impedance matching. The polystyrene rod 13 has a length of 6λ in the extending direction from the open end of the circular metal pipe waveguide 11, and its diameter is 0.5λ to 0.3λ from the open end to a length of 3λ.
It tapers to a circular rod with a diameter of 0.3λ. Here λ is the free space wavelength of the carrier wave.
空中線１を上記の様に構成すれば、同軸ケーブ
ル給電線１４から供給された高周波信号は、電磁
波に変換され、ポリスチレンロツド１３に案内さ
れて、延在方向に最大エネルギーを有して輻射さ
れる。上記の様に構成した空中線１の指向特性図
を第１図ｂに示す。 If the antenna 1 is configured as described above, the high frequency signal supplied from the coaxial cable feeder line 14 is converted into an electromagnetic wave, guided by the polystyrene rod 13, and radiated with maximum energy in the extending direction. Ru. A directional characteristic diagram of the antenna 1 constructed as described above is shown in FIG. 1b.
本実施例では、以上のように、単一指向特性を
有し、かつ、積荷との接触に耐え得る材料から成
るロツドを備える空中線を用いてアンローダ用の
対船倉底間距離検出装置を形成したから、空中線
を積荷に接触させた状態で距離を測定でき、空気
中の電磁波の拡散防止、Ｓ／Ｎ比の向上、送信電
力の節約が図れる。また、ロツドを低廉かつ加工
の容易なポリスチレンにしたから、適用範囲の広
い、実用性の高い距離検出装置が実現できる。更
に、空中線は、前述したように単一指向性を有す
るから、積荷に対して空中線を深く挿入する必要
がなく、船底の破損を防止できる。他方、空中線
は、積荷との接触に耐え得る強靱な材料から成る
ロツドを備えるから、空中線の破損をも防止でき
る。 In this embodiment, as described above, the distance detection device for the unloader to the bottom of the cargo hold is formed using an antenna equipped with a rod made of a material that has unidirectional characteristics and can withstand contact with cargo. This allows the distance to be measured with the antenna in contact with the cargo, preventing the spread of electromagnetic waves in the air, improving the S/N ratio, and saving transmission power. Furthermore, since the rod is made of polystyrene, which is inexpensive and easy to process, a highly practical distance detection device with a wide range of applications can be realized. Furthermore, since the antenna has unidirectionality as described above, there is no need to insert the antenna deeply into the cargo, and damage to the bottom of the ship can be prevented. On the other hand, since the antenna is provided with a rod made of a strong material that can withstand contact with the cargo, damage to the antenna can also be prevented.
次に、以下、上記空中線を用いた距離検出装置
が連続アンローダの対船倉底間距離検出装置とし
て使用される場合についてより具体的に説明す
る。第２図及び第３図に示すとおり、対船倉底間
距離検出装置は例えば、バケツトエレベータ２の
下端部に取り付けられた支持部材３に、上記した
構造の空中線１を固定した構成を備え、空中線１
はセンサ部４と電気的に接続されている。空中線
１は、電磁波の輻射方向が船倉底面に指向されて
いる。センサ部４は、第４図に基づいて既述した
構成とする。支持部材３は、空中線１を支持する
絶縁体がポリスチレンロツド１３の延在方向に伸
縮自在に取り付けられ、その伸縮量を検出できる
よう構成する。 Next, a case in which the distance detecting device using the above-mentioned antenna is used as a distance detecting device to the bottom of a cargo hold of a continuous unloader will be described in more detail. As shown in FIGS. 2 and 3, the distance detection device from the bottom of the ship's hold has, for example, a configuration in which the antenna 1 having the above-described structure is fixed to the support member 3 attached to the lower end of the bucket elevator 2. aerial line 1
is electrically connected to the sensor section 4. The antenna 1 has an electromagnetic wave radiated toward the bottom of the hold. The sensor section 4 has the configuration already described based on FIG. 4. The support member 3 is configured such that an insulator supporting the antenna 1 is attached so as to be expandable and contractible in the extending direction of the polystyrene rod 13, and the amount of expansion and contraction can be detected.
上記構成に基づいて、連続式アンローダの対船
倉底間距離検出装置の作用を説明する。第２図及
び第３図に示すように荷揚作業前、あるいは荷揚
作業中、支持部材３を船倉底方向に伸ばして、該
支持部材３に支持された空中線１を積荷層５に接
触させる。このようにすれば、空中線から輻射さ
れる電磁波は、空気層を経由しないため、空気層
と積荷層５との比誘電率の差による積荷表面６か
らの反射の影響を受けない。いま、第３図に示す
ように、船倉底７からバケツトエレベータ最下端
点までの距離をｘ、空中線１の接触点までの距離
をｙ、積荷表面６までの距離をｚとする。伸縮す
る支持部材３によつて変化するｙとｘとの差分
は、本実施例に係る対船倉底検出装置の取付の際
に知ることができる。また、空中線１を積荷表面
６に接触させた状態にすれば、ｚ＝ｙとなる。 Based on the above configuration, the operation of the continuous unloader to cargo hold bottom distance detection device will be explained. As shown in FIGS. 2 and 3, before or during the unloading operation, the support member 3 is extended toward the bottom of the hold, and the antenna 1 supported by the support member 3 is brought into contact with the cargo layer 5. In this way, the electromagnetic waves radiated from the antenna do not pass through the air layer, so they are not affected by reflection from the cargo surface 6 due to the difference in dielectric constant between the air layer and the cargo layer 5. Now, as shown in FIG. 3, the distance from the bottom of the hold 7 to the lowest point of the bucket elevator is x, the distance to the contact point of the antenna 1 is y, and the distance to the cargo surface 6 is z. The difference between y and x, which changes due to the expanding and contracting support member 3, can be known when the cargo hold bottom detection device according to this embodiment is installed. Furthermore, if the antenna 1 is brought into contact with the cargo surface 6, z=y.
この様に、空中線１が常に積荷層５内の任意の
点と接触した状態で電磁波の送受を行なうから、
積荷表面７の乱反射に影響されず、かつ、バケツ
トエレベータ最下端点と船倉底間の距離を測定で
きる対船倉底間距離検出装置を実現できる。ま
た、上記空中線１は、前記第１実施例で示した低
廉かつ加工容易なポリスチレンロツドを素材とす
るから、実用性の高い対船倉底間距離検出装置を
実現できる。 In this way, since the antenna 1 always sends and receives electromagnetic waves while being in contact with any point within the cargo layer 5,
It is possible to realize a distance-to-ship hold bottom distance detection device that is not affected by diffused reflection from the cargo surface 7 and can measure the distance between the lowest point of the bucket elevator and the hold bottom. Furthermore, since the antenna 1 is made of the inexpensive and easily processed polystyrene rod shown in the first embodiment, a highly practical distance detecting device from the bottom of a ship's hold can be realized.
尚、本発明に係る距離検出装置は、スタツカ
ー、リクレーマ等港湾荷役装置、あるいは、サイ
ロ等食料倉庫の荷役装置にも応用することができ
る。 The distance detection device according to the present invention can also be applied to port cargo handling devices such as stackers and reclaimers, or cargo handling devices in food warehouses such as silos.
以上の説明のとおり、本発明によれば、作業能
率の向上が図れ、検出距離が長く、かつ高信頼
性、高実用性の電磁波センサを備えた距離検出装
置を提供することができる。
As described above, according to the present invention, it is possible to provide a distance detection device that improves work efficiency, has a long detection distance, and is equipped with a highly reliable and highly practical electromagnetic wave sensor.
また、本発明によれば、測定対象物、即ち、船
倉底との間に介在する積荷等の表面反射に影響さ
れない距離検出装置を提供することができる。 Further, according to the present invention, it is possible to provide a distance detecting device that is not affected by surface reflections of cargo or the like interposed between the object to be measured, that is, the bottom of the cargo hold.
第１図ａは、ポリスチレンロツドを有する空中
線の断面構成図、第１図ｂは、該空中線の指向特
性図、第２図は、対船倉底間距離検出装置を取り
付けた連続式アンローダの側面図、第３図は同正
面図、第４図は電磁波センサを備えた距離検出装
置の概略構成図、第５図は、連続波レーダ式距離
検出装置における変復調波の特性関係図を示す。
図中、１……ポリスチレンロツドを有する空中
線、３……支持部材、４……距離検出部、１０…
…同調スタブ、１１……円形金属管導波管、１３
……ポリスチレンロツド、１４……同軸ケーブル
給電線。
Fig. 1a is a cross-sectional diagram of an antenna having a polystyrene rod, Fig. 1b is a directional characteristic diagram of the antenna, and Fig. 2 is a side view of a continuous unloader equipped with a distance detection device to the bottom of the cargo hold. 3 is a front view of the same, FIG. 4 is a schematic configuration diagram of a distance detection device equipped with an electromagnetic wave sensor, and FIG. 5 is a diagram showing the characteristics of modulation and demodulation waves in a continuous wave radar type distance detection device. In the figure, 1... antenna having a polystyrene rod, 3... support member, 4... distance detection section, 10...
... Tuning stub, 11 ... Circular metal tube waveguide, 13
...Polystyrene rod, 14...Coaxial cable feeder line.
Claims (1)
された積荷を搬出する連続アンローダの対船倉底
間距離検出装置において、前記積荷に接触し、前
記船倉底に対し輻射方向が指向するように、前記
バケツトエレベータの下端部に取り付けられた空
中線と、該空中線を介して電磁波を送出し、前記
船倉底から反射電磁波を検出することによつて、
該船倉底までの距離を測定するセンサ部とを有
し、前記空中線は、金属導波管と、該導波管から
延在するポリスチレンから成るロツドとを有する
ことを特徴とする連続アンローダの対船倉底間距
離検出装置。1. In a distance detection device for a continuous unloader that uses a bucket elevator to carry out a cargo placed on the bottom of a cargo hold, the device contacts the cargo and directs the radiation direction toward the bottom of the cargo hold, By transmitting electromagnetic waves through an antenna attached to the lower end of the bucket elevator and detecting reflected electromagnetic waves from the bottom of the hold,
a sensor section for measuring the distance to the bottom of the cargo hold, and the antenna includes a metal waveguide and a rod made of polystyrene extending from the waveguide. Hold bottom distance detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62067351A JPS63233389A (en) | 1987-03-20 | 1987-03-20 | Distance detector and detector of distance from unloader to hold bottom utilizing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62067351A JPS63233389A (en) | 1987-03-20 | 1987-03-20 | Distance detector and detector of distance from unloader to hold bottom utilizing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63233389A JPS63233389A (en) | 1988-09-29 |
| JPH0473756B2 true JPH0473756B2 (en) | 1992-11-24 |
Family
ID=13342510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62067351A Granted JPS63233389A (en) | 1987-03-20 | 1987-03-20 | Distance detector and detector of distance from unloader to hold bottom utilizing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63233389A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329547A (en) * | 1976-09-01 | 1978-03-18 | Hitachi Ltd | Relay unit for pilot wire |
| JPS59194942A (en) * | 1983-04-19 | 1984-11-05 | Ishikawajima Harima Heavy Ind Co Ltd | Operation of unloader |
| JPS6127837A (en) * | 1984-07-13 | 1986-02-07 | Ishikawajima Harima Heavy Ind Co Ltd | Positioning of continuous unloader |
-
1987
- 1987-03-20 JP JP62067351A patent/JPS63233389A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329547A (en) * | 1976-09-01 | 1978-03-18 | Hitachi Ltd | Relay unit for pilot wire |
| JPS59194942A (en) * | 1983-04-19 | 1984-11-05 | Ishikawajima Harima Heavy Ind Co Ltd | Operation of unloader |
| JPS6127837A (en) * | 1984-07-13 | 1986-02-07 | Ishikawajima Harima Heavy Ind Co Ltd | Positioning of continuous unloader |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63233389A (en) | 1988-09-29 |
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