JPS63233389A - Distance detector and detector of distance from unloader to hold bottom utilizing the same - Google Patents
Distance detector and detector of distance from unloader to hold bottom utilizing the sameInfo
- Publication number
- JPS63233389A JPS63233389A JP62067351A JP6735187A JPS63233389A JP S63233389 A JPS63233389 A JP S63233389A JP 62067351 A JP62067351 A JP 62067351A JP 6735187 A JP6735187 A JP 6735187A JP S63233389 A JPS63233389 A JP S63233389A
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- Prior art keywords
- antenna
- distance
- hold
- detection device
- cargo
- 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.)
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- 239000004793 Polystyrene Substances 0.000 claims abstract description 17
- 229920002223 polystyrene Polymers 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 239000012212 insulator Substances 0.000 abstract description 2
- 230000001788 irregular Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000000034 method Methods 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
- 238000009792 diffusion process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
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って、測定対、象物
までの距離を測定する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 or object by transmitting electromagnetic waves through an antenna and detecting reflected electromagnetic waves from the measurement target. The present invention relates to a distance detection device.
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、バケッ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ッ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、バケットエレベータ
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、バケット
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。BACKGROUND ART 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 toward the bottom of the hold, and it descends as the layer of cargo decreases, so as the layer of cargo becomes thinner, the lower end of the bucket elevator collides with the bottom of the hold. There is a risk that this may occur. Therefore, in order to prevent accidents caused by mutual contact and 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、バケッ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
ッ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 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 the hold and the bottom of the hold by utilizing the effect that the change in magnetic flux of a detection coil placed opposite the bottom of the hold increases as it approaches the bottom of the hold ( Japanese Patent Publication No. 58-207224
). In addition, the distance detection device equipped with a mechanical sensor monitors the distance between the bottom of the cargo hold and the bottom of the cargo hold using a detection rod attached to the lower end of the bucket elevator so that it can move up and down, and outputs a warning signal when a dangerous distance is reached. (1986)
-151931, Utility Model 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って
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
欠点があった。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
倉底め破損等の問題があった。Distance detection devices equipped with magnetic sensors have a short detection distance, so they have the disadvantage that they are unsuitable for applications where it is necessary to detect distance over a relatively wide range, such as in an unloader. 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 problems such as damage to the bottom of the hold due to contact between the detection rod and the bottom of the hold. was there.
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、かつ高い信転
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。Therefore, in view of the above problems and drawbacks, an object of the present invention is to
It is an object of the present invention to provide a highly practical distance detection device that can improve work efficiency, has a long detection distance, and has high reliability.
本発明の他の目的は、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。Another object of the present invention is 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 surface reflections of cargo interposed between the object to be measured, that is, the bottom of the ship's hold.
本発明によれば、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って、測定対
象物までの距離を測定する距離検出装置において、前記
空中線は、金属管導波管と該導波管から延在するポリス
チレンロッドを有することを特徴とする距離検出装置が
得られる。According to the present invention, in the distance detection device that measures the distance to an object to be measured by transmitting electromagnetic waves via an antenna and detecting reflected electromagnetic waves from the object, the antenna is formed of a metal tube waveguide. and a polystyrene rod extending from the waveguide.
また、本発明によれば、バケットエレベータを有する連
続アンローダの対船倉底間距離検出装置において、前記
バケットエレベータ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、測定対象物から反射電磁波
を検出することによって、測定対象物までの距離を測定
するセンサ部とを有し、前記空中線は、金属管導波管と
該導波管から延在するボ゛リスチレンロッドを有するこ
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。Further, according to the present invention, in the distance detection device for a continuous unloader having a bucket elevator, the antenna is attached to the bucket elevator, and an electromagnetic wave is transmitted through the antenna, and an electromagnetic wave is reflected from an object to be measured. and a sensor unit that measures the distance to the object to be measured by detecting the distance, and the antenna includes a metal pipe waveguide and a polystyrene rod extending from the waveguide. A device for detecting the distance between a continuous unloader and the bottom of a ship's hold is obtained.
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
キュレータ４２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。サーキュレータ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 detection device includes a modulation section 40 that performs predetermined modulation on a carrier wave, and an output signal (modulated wave) of the modulation section 40 that is amplified to a predetermined power value. It has a transmission amplifying section 41 that performs the following steps. The output signal (transmission wave) of the transmission amplification section 41 is guided to a circulator 42 that allows signals in only a certain direction to pass, and is sent out via an 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、サーキュレータ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 extracted by the antenna 43, converted to 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
弐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。FIG. 5 shows a diagram showing the characteristics of modulation and demodulation waves in a conventional continuous wave radar 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.
第５図かられかるように、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りとの間には次式の関係式
が成立している。As can be seen from FIG. 5, a frequency beat Δf corresponding to the propagation distance of the electromagnetic wave occurs between the modulation and demodulation waves. The following relational expression holds true between this Δf and the distance to the object to be measured.
０式を変形すると、
ｈ＝□°Δｆ ・・・・・・■
４・ｆｍ−Ｂ 、
従ってこのΔｆを検出することによって測定対象物まで
の距離を測定することができる。If the equation 0 is modified, h=□°Δf 4·fm−B 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＝□ ・・・・・・■■
ｈ＝□ ・・・・・・■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 expressions are established: t=□...■■ h=□...■■.
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１
４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１工と、前記開口された一端から延在するポリス
チレンロッド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ッド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（ａｌ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クブ１０
が設けられている。ポリスチレンロッド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ヘテーパ状に細まり、その後は０．
３λの径を有する円形ロンドである。ここにλは、搬送
波の自由空間波長である。Referring to FIG. 1(a), the antenna in one embodiment of the present invention is a coaxial cable feeder 14 that supplies high frequency power.
, one end is open and the other end is connected to the feeder line 1
The waveguide has a circular metal pipe waveguide short-circuited at a predetermined distance from the core wire of No. 4, and a polystyrene rod 13 extending from the open end. Circular metal tube waveguide 11
has a shape that allows impedance matching between the power supply line 14 and the polystyrene rod 13, and specifically,
Figure 1 (tube wavelength λg shown in al, free space wavelength λ
It is determined based on. On the side of the circular metal tube waveguide 11, there is a tuning squib 10 that assists the impedance matching.
is provided. The polystyrene rod 13 has a length of 6λ in the extending direction from the open end of the circular metal tube waveguide 11, and its diameter is 0 from the open end to a length of 3λ.
, tapers from 5λ to 0.3λ, and then tapers to 0.
It is a circular rondo with a diameter of 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、
ポリスチレンロッド１３に案内されて、延在方向に最大
エネルギーを存して輻射される。上記の様に構成した空
中線１の指向特性図を第１図（ｂｌ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 electromagnetic waves,
It is guided by the polystyrene rod 13 and radiates with maximum energy in the extending direction. A directional characteristic diagram of the antenna 1 constructed as described above is shown in FIG. 1 (bl).
本実施例では、以上のように、単一指向特性を有する空
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、空気層内での電磁波の拡散を防止でき、Ｓ／
Ｎ比の向上、送信電力の節約が図れる。また、空中線の
素材を低度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、積荷に対して空中線を深く挿入する必要もな
いから、空中線の破損並びに船底の破損等をも防止でき
る。In this embodiment, as described above, since the antenna with unidirectional characteristics is used to form the distance detection device for the unloader from the cargo hold bottom, the distance can be measured with the antenna in contact with the cargo, and the It can prevent the diffusion of electromagnetic waves within the layer, and S/
It is possible to improve the N ratio and save transmission power. In addition, since the material of the antenna is polystyrene, which is low-strength and easy to process,
A highly practical distance detection device with a wide range of applications can be realized. Furthermore, since there is no need to insert the antenna deep into the cargo, damage to the antenna and the bottom of the ship can 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。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.
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、バケットエレベータ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ｌ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。As shown in FIGS. 2 and 3, the distance detecting device to the bottom of a ship's hold has, for example, a configuration in which an antenna 1 having the above-described structure is fixed to a support member 3 attached to the lower end of a bucket elevator 2. l is electrically connected to the sensor section 4. The antenna 1 has an electromagnetic wave radiated toward the bottom of the hold.
センサ部４は、第４図に基づいて既述した構成とする。The sensor section 4 has the configuration already described based on FIG. 4.
支持部材３は、空中線１を支持する絶縁体がポリスチレ
ンロッド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。The support member 3 is configured such that an insulator that supports the antenna 1 is attached 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Ｎ５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からバケッ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２とする。伸縮する支持部材３によって変化
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 N5. In this way, the electromagnetic waves radiated from the antenna will not pass through the air layer,
It is 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, it is assumed that 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 2. The difference between y and X, which changes due to the expanding and contracting support member 3, can be known at the time of installing the cargo hold bottom detection device according to this embodiment. 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、バケットエレベータ最下端点
と船倉度量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
で示した低度かつ加工容易なポリスチレンロッドを素材
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 not affected by diffuse reflection from the cargo surface 7, and the distance between the lowest point of the bucket elevator and the cargo space is It is possible to realize a distance detection device between the bottom of the ship's hold and the bottom of the ship's hold. Furthermore, since the antenna 1 is made of the low-strength and easy-to-process polystyrene rod shown in the first embodiment, it is possible to realize a highly practical distance detecting device from the bottom of a ship's hold.
尚、本発明に係る距離検出装置は、スタンカー、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 stunkers 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（、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、ポリスチレンロッドを有する空中線の
断面構成図、第１図（ｂｌ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：ポリスチレンロッドを有する空中線、３：支持部材
、４：距離検出部、ｌＯ：同調スタブ、１１：円形金属
管導波管、１３：ポリスチレンロッド、１４：同軸ケー
ブル給電線。
第１図
第２図FIG. 1(a) is a cross-sectional configuration diagram of an antenna having a polystyrene rod, FIG. 1(bl is a directional characteristic diagram of the antenna,
Figure 2 is a side view of a continuous unloader equipped with a distance detection device to the bottom of the cargo hold, Figure 3 is a front view of the same, Figure 4 is a schematic diagram of the distance detection device equipped with an electromagnetic wave sensor, and Figure 5 1 shows a characteristic relationship diagram 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, IO: tuning stub, 11: circular metal pipe waveguide, 13: polystyrene rod, 14: coaxial cable feeder line. Figure 1 Figure 2
Claims (1)
射電磁波を検出することによって、測定対象物までの距
離を測定する距離検出装置において、前記空中線は、金
属管導波管と該導波管から延在するポリスチレンロッド
を有することを特徴とする距離検出装置。 ２）バケットエレベータを有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、前記バケットエレベータ
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、測定対象物から反射電磁波を検出することによ
って、測定対象物までの距離を測定するセンサ部とを有
し、前記空中線は、金属管導波管と該導波管から延在す
るポリスチレンロッド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。[Claims] 1) A distance detection device that measures the distance to a measurement target by transmitting electromagnetic waves via an antenna and detecting reflected electromagnetic waves from the measurement target, wherein the antenna is a metal tube conductor. A distance detection device comprising a waveguide and a polystyrene rod extending from the waveguide. 2) In a distance detection device for a continuous unloader having a bucket elevator, the antenna is attached to the bucket elevator, and by transmitting electromagnetic waves through the antenna and detecting reflected electromagnetic waves from the object to be measured, a sensor section for measuring a distance to an object to be measured, and the antenna has a metal pipe waveguide and a polystyrene rod extending from the waveguide. 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 true JPS63233389A (en) | 1988-09-29 |
| JPH0473756B2 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 |
|---|---|
| JPH0473756B2 (en) | 1992-11-24 |
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