JP2005257606A - Collision-avoiding system - Google Patents

Collision-avoiding system Download PDF

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JP2005257606A
JP2005257606A JP2004072439A JP2004072439A JP2005257606A JP 2005257606 A JP2005257606 A JP 2005257606A JP 2004072439 A JP2004072439 A JP 2004072439A JP 2004072439 A JP2004072439 A JP 2004072439A JP 2005257606 A JP2005257606 A JP 2005257606A
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microwave
collision prevention
antenna
mixer
directional coupler
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JP4468024B2 (en
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Kenji Kurose
憲二 黒瀬
Hayae Kayano
早衛 萱野
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Wadeco Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a collision-avoiding system using microwaves, in which price the reduction in the collision avoiding system is attempted, by unifying a transmitting antenna and a receiving antenna. <P>SOLUTION: In the collision-avoiding system which is loaded to a pair of the object movable each other or the both objects, one is fixed and other is movable, and detects the distance between both the objects via the received intensity from transmission and reception of microwaves to prevent collisions, microwaves are transmitted and received by a single antenna and the microwaves, transmitted from oneself and the microwaves transmitted from the other, are mixed, to detect the distance between both the objects via the intensity of the mixed signals concerned. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、互いに移動可能な一対の物体間、あるいは一方が固定され他方が移動可能な物体間における衝突防止装置に関する。   The present invention relates to a collision preventing apparatus between a pair of objects that can move with each other, or between objects that have one fixed and the other movable.

例えば、工場や物品を入出庫する倉庫では、天井に架設した軌道(レール)にクレーンを走行可能に装備してなるクレーン設備を備えるものがある。このようなクレーン設備においては、物品の移動や移載処理の効率を高めるため、同一の軌道上に複数のクレーンを装備するように構成されることがある。ところが、クレーンを走行可能に装備した場合には、クレーン同士又はクレーンと軌道端とが衝突しないように制御する必要が生じる。このような背景から、クレーン同士又はクレーンと軌道端間の衝突を防止する装置として、マイクロ波方式のクレーン衝突防止装置が開発されている。   For example, some factories and warehouses that store and receive goods are equipped with a crane facility that is equipped with a crane on a track (rail) installed on the ceiling so that the crane can run. Such a crane facility may be configured to equip a plurality of cranes on the same track in order to increase the efficiency of movement and transfer processing of articles. However, when the cranes are installed so as to be able to run, it is necessary to control the cranes so that the cranes do not collide with the track ends. Against this background, microwave crane collision prevention devices have been developed as devices for preventing collisions between cranes or between a crane and a track end.

図3は、このようなマイクロ波方式のクレーン衝突防止装置の使用例を示したものである(例えば、特許文献1参照)。図示されるように、共通のレール上を走行するクレーンA,Bはそれぞれ衝突防止装置A,Bを備えており、各衝突防止装置A,Bは送信アンテナ10から他方の衝突防止装置に向けてマイクロ波を送信するとともに、受信アンテナ11で他方の衝突防止装置から送信されるマイクロ波を受信し、相互に離間距離を検知し合うことで衝突を防止している。   FIG. 3 shows an example of using such a microwave crane collision prevention apparatus (see, for example, Patent Document 1). As shown in the figure, the cranes A and B traveling on a common rail are provided with collision prevention devices A and B, respectively, and each of the collision prevention devices A and B is directed from the transmitting antenna 10 toward the other collision prevention device. While transmitting the microwave, the receiving antenna 11 receives the microwave transmitted from the other collision prevention device, and the collision is prevented by detecting the separation distance from each other.

特開平8−151187号公報JP-A-8-151187

しかしながら、上記の衝突防止装置では、送信用と受信用の2つのアンテナ10,11が必要であり、コスト高が余儀なくされている。   However, in the above-described collision prevention device, two antennas 10 and 11 for transmission and reception are necessary, and the cost is inevitably increased.

従って、本発明はマイクロ波を用いた衝突防止装置において、送信用と受信用のアンテナを単一化して衝突防止装置の低コスト化を図ることを目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the cost of a collision prevention apparatus by unifying a transmission antenna and a reception antenna in a collision prevention apparatus using a microwave.

上記目的は、本発明に係る下記衝突防止方法及び衝突防止装置により達成される。
(1)互いに移動可能な一対の各物体、あるいは一方が固定され他方が移動可能な各物体に装着され、マイクロ波を送受信して受信強度から両物体間の距離を検知して衝突を防止する装置であって、
一方の物体側の衝突防止装置は、第1の周波数のマイクロ波を発振するマイクロ波発振器と、前記マイクロ波発振器から発振されたマイクロ波を送信し、かつ、他方の物体側の衝突防止装置から送信されるマイクロ波を受信するためのアンテナと、前記マイクロ波発信器から発振されたマイクロ波を分波してその一部を前記アンテナ側に送り、残部をミキサ側に送る方向性結合器と、前記方向性結合器と前記アンテナとの間に介挿されるサーキュレータと、前記方向性結合器で分波された残りのマイクロ波と、前記サーキュレータから送られるマイクロ波とをミキシングするミキサと、前記ミキサから出力される周波数信号の強度から他方の物体側の衝突防止装置までの距離を算出する制御部とを備え、
他方の物体側の衝突防止装置は、第2の周波数のマイクロ波を発振するマイクロ波発振器と、前記マイクロ波発振器から発振されたマイクロ波を送信し、かつ、一方の物体側の衝突防止装置から送信されるマイクロ波を受信するためのアンテナと、前記マイクロ波発信器から発振されたマイクロ波を分波してその一部を前記アンテナ側に送り、残部をミキサ側に送る方向性結合器と、前記方向性結合器と前記アンテナとの間に介挿されるサーキュレータと、前記方向性結合器で分波された残りのマイクロ波と、前記サーキュレータから送られるマイクロ波とをミキシングするミキサと、前記ミキサから出力される周波数信号の強度から他方の物体側の衝突防止装置までの距離を算出する制御部とを備えることを特徴とする衝突防止装置。
The above object is achieved by the following collision prevention method and collision prevention apparatus according to the present invention.
(1) A pair of movable objects, or one fixed object and the other movable object, are attached to each other, and transmit and receive microwaves to detect the distance between the two objects from the received intensity to prevent collision. A device,
One object-side collision prevention apparatus transmits a microwave oscillator that oscillates a microwave of a first frequency, and a microwave oscillated from the microwave oscillator, and from the other object-side collision prevention apparatus An antenna for receiving a microwave to be transmitted, a directional coupler for demultiplexing the microwave oscillated from the microwave transmitter, sending a part thereof to the antenna side, and sending the remainder to the mixer side; A circulator interposed between the directional coupler and the antenna, a remaining microwave demultiplexed by the directional coupler, and a mixer for mixing the microwaves sent from the circulator, A controller that calculates the distance from the intensity of the frequency signal output from the mixer to the collision prevention device on the other object side,
The other object-side collision prevention apparatus transmits a microwave oscillator that oscillates a microwave having a second frequency, the microwave oscillated from the microwave oscillator, and the one object-side collision prevention apparatus An antenna for receiving a microwave to be transmitted, a directional coupler for demultiplexing the microwave oscillated from the microwave transmitter, sending a part thereof to the antenna side, and sending the remainder to the mixer side; A circulator interposed between the directional coupler and the antenna, a remaining microwave demultiplexed by the directional coupler, and a mixer for mixing the microwaves sent from the circulator, A collision prevention apparatus comprising: a control unit that calculates a distance from the intensity of the frequency signal output from the mixer to the collision prevention apparatus on the other object side.

本発明によれば、送信用と受信用のアンテナを単一化してマイクロ波を用いた衝突防止装置の低コスト化を図ることができる。   According to the present invention, it is possible to reduce the cost of a collision prevention apparatus using microwaves by unifying transmission and reception antennas.

以下、本発明に関して図面を参照して詳細に説明するが、ここでは図3に示したクレーン同士の衝突防止を例示して説明する。尚、図1は衝突防止装置を示す概略図であり、図2はその主要構成部品の回路図である。   Hereinafter, the present invention will be described in detail with reference to the drawings. Here, the prevention of collision between cranes shown in FIG. 3 will be described as an example. FIG. 1 is a schematic view showing a collision prevention device, and FIG. 2 is a circuit diagram of its main components.

図1に示されるように、共通のレール上を走行するクレーンA,Bはそれぞれ本発明の衝突防止装置A,Bを備えており、各衝突防止装置A,Bはそれぞれ単一のアンテナ5を介してマイクロ波の送受信を行う。   As shown in FIG. 1, cranes A and B traveling on a common rail are provided with collision prevention devices A and B of the present invention, respectively, and each collision prevention device A and B has a single antenna 5. Via microwaves.

図2に示すように、一方の衝突防止装置Aでは、マイクロ波発振器1により周波数(f1)のマイクロ波を発振し、方向性結合器2によりその一部をサーキュレータ3を経由してアンテナ5に送り、他方の衝突防止装置Bに向けてマイクロ波を送信する。また、方向性結合器2は、残りのマイクロ波をミキサ4に送る。サーキュレータ3は、方向性結合器2から送られるマイクロ波をアンテナ5に送る操作と、アンテナ5で受信した衝突防止装置Bからの送信されたマイクロ波をミキサ4に送る操作を行う。従って、ミキサ4には、衝突防止装置A自身が送信するマイクロ波と、衝突防止装置Bから送信されるマイクロ波とが入力され、2つのマイクロ波がミキシングされる。   As shown in FIG. 2, in one anti-collision device A, a microwave having a frequency (f1) is oscillated by a microwave oscillator 1, and a part of the directional coupler 2 is passed through a circulator 3 to an antenna 5. The microwave is transmitted toward the other collision prevention apparatus B. Further, the directional coupler 2 sends the remaining microwaves to the mixer 4. The circulator 3 performs an operation of sending the microwave sent from the directional coupler 2 to the antenna 5 and an operation of sending the microwave sent from the collision prevention apparatus B received by the antenna 5 to the mixer 4. Accordingly, the mixer 4 receives the microwave transmitted from the collision prevention apparatus A itself and the microwave transmitted from the collision prevention apparatus B, and mixes the two microwaves.

また、他方の衝突防止装置Bでは、マイクロ波発振器1により周波数(f2)のマイクロ波を発振し、方向性結合器2によりその一部をサーキュレータ3を経由してアンテナ5に送り、上記衝突防止装置Aに向けてマイクロ波を送信する。また、方向性結合器2は、残りのマイクロ波をミキサ4に送る。サーキュレータ3は、方向性結合器2から送られるマイクロ波をアンテナ5に送る操作と、アンテナ5で受信した衝突防止装置Aからの送信されたマイクロ波をミキサ4に送る操作を行う。従って、ミキサ4には、衝突防止装置B自身が送信するマイクロ波と、衝突防止装置Aから送信されるマイクロ波とが入力され、2つのマイクロ波がミキシングされる。   In the other anti-collision device B, the microwave oscillator 1 oscillates the microwave of the frequency (f2), and the directional coupler 2 sends a part thereof to the antenna 5 via the circulator 3 to prevent the above-described collision prevention. A microwave is transmitted toward apparatus A. Further, the directional coupler 2 sends the remaining microwaves to the mixer 4. The circulator 3 performs an operation of transmitting the microwave transmitted from the directional coupler 2 to the antenna 5 and an operation of transmitting the microwave transmitted from the collision prevention apparatus A received by the antenna 5 to the mixer 4. Accordingly, the mixer 4 receives the microwave transmitted from the collision prevention apparatus B itself and the microwave transmitted from the collision prevention apparatus A, and mixes the two microwaves.

即ち、両衝突防止装置A,Bでは、それぞれのミキサ4において、衝突防止装置Aからの周波数(f1)のマイクロ波と、衝突防止装置Bからの周波数(f2)のマイクロ波とがミキシングされ(ヘテロダイン方式)、両周波数の差の周波数の信号がそれぞれの増幅器6から出力される。そして、図示は省略される制御部において、出力信号の強度から両衝突防止装置A,Bの離間距離を算出し、所定の距離まで近づいたと判断されたときに、クレーンA,Bを停止させて衝突を回避する。   That is, in both of the collision prevention devices A and B, in each mixer 4, the microwave of the frequency (f1) from the collision prevention device A and the microwave of the frequency (f2) from the collision prevention device B are mixed ( Heterodyne system), a signal having a frequency difference between the two frequencies is output from each amplifier 6. And in the control part which illustration is abbreviate | omitted, when the separation distance of both the collision prevention apparatuses A and B is calculated from the intensity | strength of an output signal and it is judged that it approached to the predetermined distance, the cranes A and B are stopped. Avoid collisions.

尚、上記において、主たる構成部品のマイクロ波発信器1、方向性結合器2、サーキュレータ3、ミキサ4、アンテナ5及び増幅器6は、何れも公知のもので構わない。   In the above, the microwave transmitter 1, the directional coupler 2, the circulator 3, the mixer 4, the antenna 5, and the amplifier 6 as main components may be any known ones.

このように、本発明の衝突防止装置では、マイクロ波の送受信を単一のアンテナで行うことができ、低コスト化を実現できる。   Thus, in the collision preventing apparatus of the present invention, microwaves can be transmitted and received with a single antenna, and cost reduction can be realized.

本発明の衝突防止装置の一例を示す概略図である。It is the schematic which shows an example of the collision prevention apparatus of this invention. 本発明の衝突防止装置の主要構成部品を示す回路図である。It is a circuit diagram which shows the main components of the collision prevention apparatus of this invention. 従来の衝突防止装置の一例を示す概略図である。It is the schematic which shows an example of the conventional collision prevention apparatus.

符号の説明Explanation of symbols

1 マイクロ波発振基
2 方向性結合器
3 サーキュレータ
4 ミキサ
5 アンテナ
6 増幅器
1 Microwave Oscillation Base 2 Directional Coupler 3 Circulator 4 Mixer 5 Antenna 6 Amplifier

Claims (1)

互いに移動可能な一対の各物体、あるいは一方が固定され他方が移動可能な各物体に装着され、マイクロ波を送受信して受信強度から両物体間の距離を検知して衝突を防止する装置であって、
一方の物体側の衝突防止装置は、第1の周波数のマイクロ波を発振するマイクロ波発振器と、前記マイクロ波発振器から発振されたマイクロ波を送信し、かつ、他方の物体側の衝突防止装置から送信されるマイクロ波を受信するためのアンテナと、前記マイクロ波発信器から発振されたマイクロ波を分波してその一部を前記アンテナ側に送り、残部をミキサ側に送る方向性結合器と、前記方向性結合器と前記アンテナとの間に介挿されるサーキュレータと、前記方向性結合器で分波された残りのマイクロ波と、前記サーキュレータから送られるマイクロ波とをミキシングするミキサと、前記ミキサから出力される周波数信号の強度から他方の物体側の衝突防止装置までの距離を算出する制御部とを備え、
他方の物体側の衝突防止装置は、第2の周波数のマイクロ波を発振するマイクロ波発振器と、前記マイクロ波発振器から発振されたマイクロ波を送信し、かつ、一方の物体側の衝突防止装置から送信されるマイクロ波を受信するためのアンテナと、前記マイクロ波発信器から発振されたマイクロ波を分波してその一部を前記アンテナ側に送り、残部をミキサ側に送る方向性結合器と、前記方向性結合器と前記アンテナとの間に介挿されるサーキュレータと、前記方向性結合器で分波された残りのマイクロ波と、前記サーキュレータから送られるマイクロ波とをミキシングするミキサと、前記ミキサから出力される周波数信号の強度から他方の物体側の衝突防止装置までの距離を算出する制御部とを備えることを特徴とする衝突防止装置。
It is a device that prevents a collision by attaching a pair of movable objects to each other, or one fixed object and the other fixed movable object, and transmitting and receiving microwaves to detect the distance between the two objects from the received intensity. And
One object-side collision prevention apparatus transmits a microwave oscillator that oscillates a microwave of a first frequency, and a microwave oscillated from the microwave oscillator, and from the other object-side collision prevention apparatus An antenna for receiving a microwave to be transmitted, a directional coupler for demultiplexing the microwave oscillated from the microwave transmitter, sending a part thereof to the antenna side, and sending the remainder to the mixer side; A circulator interposed between the directional coupler and the antenna, a remaining microwave demultiplexed by the directional coupler, and a mixer for mixing the microwaves sent from the circulator, A controller that calculates the distance from the intensity of the frequency signal output from the mixer to the collision prevention device on the other object side,
The other object-side collision prevention apparatus transmits a microwave oscillator that oscillates a microwave having a second frequency, the microwave oscillated from the microwave oscillator, and the one object-side collision prevention apparatus An antenna for receiving a microwave to be transmitted, a directional coupler for demultiplexing the microwave oscillated from the microwave transmitter, sending a part thereof to the antenna side, and sending the remainder to the mixer side; A circulator interposed between the directional coupler and the antenna, a remaining microwave demultiplexed by the directional coupler, and a mixer for mixing the microwaves sent from the circulator, A collision prevention apparatus comprising: a control unit that calculates a distance from the intensity of the frequency signal output from the mixer to the collision prevention apparatus on the other object side.
JP2004072439A 2004-03-15 2004-03-15 Collision prevention device Expired - Lifetime JP4468024B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010248460A (en) * 2009-03-26 2010-11-04 Nitto Boseki Co Ltd Method for producing diallyldialkylammonium salt/maleic acid copolymer
EP2383217A3 (en) * 2010-04-29 2012-11-28 Demag Cranes & Components GmbH Method for fetching a crane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010248460A (en) * 2009-03-26 2010-11-04 Nitto Boseki Co Ltd Method for producing diallyldialkylammonium salt/maleic acid copolymer
EP2383217A3 (en) * 2010-04-29 2012-11-28 Demag Cranes & Components GmbH Method for fetching a crane

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