JP3414139B2 - Telecommunication equipment using weak radio waves - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device using weak radio waves leaking from a tightly coupled cable, and more particularly,
The present invention relates to a communication device using weak radio waves, which can be used both as a communication device for mobiles and a communication device.

[0002]

2. Description of the Related Art Several methods have heretofore been considered in order to make a telephone call from an arbitrary point in a wide site area such as a factory, a warehouse, a construction site, or a tunnel to a remote control office or another point.

The most known method is, as shown in FIG. 4, that a plurality of fixed call points 41 are provided, and metal wires 42 are laid at these call points 41 to make a call point 41.
It is designed to allow mutual communication by using a dedicated telephone set, etc. The metal wire 42 may be an optical fiber.

In addition, there is a system in which a guide wire such as a radio wave leak cable for the purpose of making a call is laid on the ceiling of a site area and the radio wave leaked from the guide wire is caught by a wireless device carried by a worker (special feature: (Kaisho 61-220501).

It is also common to perform communication by transceiver without providing the above equipment.

[0006]

Problems of the prior art will be listed below.

(1) The metal wire system is generally considered to be a temporary system used only during construction. The metal wire after the construction is useless and will interfere with other equipment. It is not economical to make it permanent because it is used infrequently. In addition, the call is 1: N, that is, the call is simultaneously made to a large number of points, and the call cannot be made from a specific point to another specific point.

(2) In the guide wireless system, a guide line can be permanently installed and a call with a specific partner can be made.
It is superior to the metal wire system. However, it is not economical considering that it is not used frequently.

(3) The transceiver system is economical because it does not require any equipment, and it is highly practical because the call partner can be selected and the call point is arbitrary. However, there are restrictions on call distance. In addition, a call from inside the tunnel to outside the tunnel is impossible. Also, unnecessary radio waves are radiated to other equipment.

As described above, the method mainly intended for call communication is not practical in terms of economy, call distance, and operation.

By the way, a mobile body such as a patrol robot or a carrier may be introduced into the various site areas. In this case, communication equipment for traveling control of the mobile body is installed. For example, a tightly coupled cable that leaks weak radio waves is laid along the traveling route of the mobile body, and the mobile body is equipped with a wireless means for transmitting and receiving a communication signal to and from the tightly coupled cable.

In the case of a patrol robot, when an abnormality occurs at an arbitrary point on the monitoring route, the patrol robot moves to that point and performs monitoring. If monitoring the patrol robot is insufficient, a worker will go to the location and inspect it. At this time, the remote communication means is indispensable for transmitting the local situation in detail to a remote robot control room or the like, or conversely for transmitting the instruction of the control room to a local worker. Therefore, the above-mentioned call communication method is required.

[0013] In the prior art, there is no integrated communication facility for mobile units and call communication facility used by workers, and they are provided independently of each other, so that their costs are also required. .

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a communication device using weak radio waves which can be used both as a communication facility for mobile units and a facility for call communication.

[0015]

In order to achieve the above object, the present invention provides a tightly coupled cable that leaks a weak radio wave along a traveling route of a mobile body, and the tightly coupled cable is connected to the mobile body. A wireless means for transmitting and receiving a communication signal of a predetermined carrier frequency between the two, while the portable wireless device for transmitting and receiving a call signal of a single or a plurality of carrier frequencies different from the carrier frequency of the communication signal, An antenna for use in close proximity to the tightly coupled cable is connected, and the antenna is held at the tip of a support rod that is configured to be expandable and contractible.

The antenna is used by attaching an attachment interposed between the antenna and the tightly coupled cable, forming a V groove facing the tightly coupled cable in the attachment, and pressing the V groove against the tightly coupled cable. You may do it.

A coaxial cable for connecting the portable radio and the antenna may be housed inside the support rod.

The support rod may be divided into a plurality of stages from the front end to the base end, and each stage may be connected to extend and contract.

A headset comprising a microphone and a speaker may be connected to the portable radio device, and a grip portion may be formed at the base end of the support rod.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, in the communication device according to the present invention, a tightly coupled cable 1 for leaking weak radio waves is laid along the traveling route of the patrol robot, and the tightly coupled cable 1 is connected to the patrol robot. Wireless means for transmitting and receiving a communication signal of a predetermined carrier frequency between them is mounted on the other hand, a portable wireless device 2 for transmitting and receiving a call signal of a plurality of carrier frequencies different from the carrier frequency of the communication signal for the patrol robot, Connect the antenna 3 for use close to the coupling cable 1,
This antenna 3 is held at the tip of a support rod 4 which is configured to be expandable and contractible.

Although the traveling rail of the patrol robot is not shown, it is installed at a high place so as to form a traveling route in the site area. The tightly coupled cable 1 is attached to the running rail. Therefore, the tightly coupled cable 1 of FIG.
You can think of it at a height of ~ 3m.

The portable wireless device 2 is of a form that can be carried, and for example, a belt member (not shown) for wearing on the body so that it can be hung from a shoulder or a shoulder like a rucksack. Is attached. A headset 7 in which a small microphone 5 and a receiver (headphone or earphone) 6 are integrated is attached to the portable wireless device 2. This headset 7 can be worn directly on the human head or on a helmet.

The portable radio 2 has a built-in battery 8 and a radio transmitter / receiver 9, a voice modulator 10 and a voice demodulator 11. The plurality of carrier frequencies f ₁ , f _2, ... Used by the duplexer 9 are selected in bands that do not interfere with the communication signals for patrol robot control. Also,
The portable wireless device 2 is provided with a power switch 12, a connector 13 for connecting the headset 7, and a connector 14 for connecting a coaxial cable on the surface.

The antenna 3 may take any form as long as it can transmit and receive weak radio waves to and from the tightly coupled cable 1, but here, as shown in FIG. 2, the antenna body (not shown) is a rectangular parallelepiped. It is housed in the housing 15 of. An attachment 16 is attached to the upper surface of the housing 15. The attachments 16 are provided at both ends of the housing 15 in the longitudinal direction. A V groove 17 is formed at the center of the attachment 16. The tightly coupled cable 1 can be fitted into the V groove 17 as shown in the figure. It is configured so that the radio coupling with the antenna body in the housing 15 is good in a state where the tightly coupled cable 1 is fitted in the V grooves 17 of both attachments 16. Here, since the electric wave leaking from the tightly coupled cable 1 is weak, the distance between the tightly coupled cable 1 and the antenna body is 10 mm.

The support rod 4 may be a single rod as long as the antenna 3 held at the tip of the support rod 4 can reach the tightly coupled cable 1 at a high place, but the support rod 4 can be stored, carried or height adjusted. It is flexible for convenience. A foldable type will be described as one form of expansion and contraction.

As shown in FIG. 3, the support rod 4 is formed by connecting a plurality of channel members 18 each having a length of 300 to 500 mm and a U-shaped or U-shaped cross section in a plurality of stages.
The connecting portion 19 is allowed to move by pinning or the like.
When all the support rods 4 are folded in this way, 3
It has a length of 00 to 500 mm and can be fixedly carried on the portable wireless device 2. Moreover, when the support rod 4 is expanded, a sufficient length can be obtained.
A coaxial cable 20 that connects the portable wireless device 2 and the antenna 3 is housed in the space inside the channel member 18. The base end of the support rod 4 may have an elliptical or semicircular cross section to form a grip portion (not shown). Also,
A stopper mechanism may be added to lock the linear support rod 4 when the support rod 4 is unfolded into a linear shape.

Next, a method of using the communication device will be described.

Description will be made on the premise that a call is made between an arbitrary point on the traveling route of the patrol robot and a remote monitoring room. It is assumed that the patrol robot system is already in operation. When an abnormality occurs at any point on the monitoring route, the patrol robot moves to that point and performs monitoring. If monitoring the patrol robot is insufficient, a worker will go to the location and inspect it. At this time, the communication device of the present invention is used to convey the local situation in detail to a remote robot control room or the like, or conversely to transmit an instruction of the control room to a local worker.

When the communication device is not used, the support bar 4 is folded and integrally housed in the portable radio 2. The worker has a portable wireless device 2 in which the support bar 4 is integrally stored up to the point.
Carry it on your back. At this point, the worker holds the antenna 3 at the tip of the support rod 4 and connects the coaxial cable 20 in the support rod 4 to the connector 13 of the portable wireless device 2. When the power switch 12 is turned on, it becomes ready for use. The support rod 4 is extended to bring the antenna 3 close to the tightly coupled cable 1. At this time, attachment 1
By pressing the V-groove 17 of 6 onto the tightly coupled cable 1, the antenna 3 is prevented from coming off the tightly coupled cable 1, and the distance between the tightly coupled cable 1 and the antenna body is constant at any point. Become.

The antenna 3 is lightly pressed against the tightly coupled cable 1 during a call, but since the grip is formed at the base end of the support rod 4, the pressing is easy. Also,
Since the portable wireless device 2 is carried on the back and the headset 7 is used, the freedom of movement of the worker is not impaired during the call.

Since a carrier frequency different from the carrier frequency of the communication signal of the patrol robot is used for the call signal,
There is no risk of interference, and it is possible to make a call without affecting the operation of the patrol robot.

Although the above embodiment has been described on the premise that a call is made between an arbitrary point and a remote monitoring room, the portable radio 2 is provided with a channel changeover switch so that the portable radios 2 and 2 can be connected to each other. That is, it is possible to make a call between a plurality of points.

Further, it can be used not only for inspection work in a site area where a patrol robot has been introduced, but also in an emergency such as a fire. Moreover, it is not limited to remote calls, and workers can be used when the site area is in a noisy environment. Can also be used.

[0035]

The present invention exhibits the following excellent effects.

(1) Since it is possible to use both the communication equipment for mobile units and the equipment for communication of telephone calls, it is economical.

(2) Since the attachment with the V groove is provided, the distance between the antenna and the tightly coupled cable can be kept constant, and stable communication can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a telephone device showing an embodiment of the present invention.

FIG. 2 is a perspective view of an antenna of the present invention.

FIG. 3 is a perspective view of a support rod of the present invention.

FIG. 4 is a configuration diagram of a conventional metal line type communication device.

[Explanation of symbols]

1 Tightly coupled cable 2 Portable radio 3 antennas 4 support rods 7 headset 20 coaxial cable

Claims (5)

(57) [Claims] 1. A radio means for laying a tightly coupled cable for leaking a weak radio wave along a traveling route of a mobile body, for transmitting and receiving a communication signal of a predetermined carrier frequency to and from the tightly coupled cable to the mobile body. On the other hand, on the other hand, connect the antenna for use in close proximity to the tightly coupled cable to a portable radio that transmits and receives call signals of single or multiple carrier frequencies different from the carrier frequency of the communication signal. , A communication device using weak radio waves, characterized in that this antenna is held at the tip of a support rod that is configured to be extendable and contractible. 2. An antenna, which is interposed between the antenna and the tightly coupled cable, is attached to the antenna, a V groove facing the tightly coupled cable is formed in the attachment, and the V groove is pressed against the tightly coupled cable to form the antenna. The communication device utilizing weak radio waves according to claim 1, characterized in that 3. The communication device using weak radio waves according to claim 1 or 2, wherein a coaxial cable for connecting the portable wireless device and the antenna is housed inside the support rod. 4. The weak radio wave according to claim 1, wherein the support rod is divided into a plurality of stages from the tip to the base end and the stages are connected to each other so that the support rod can expand and contract. A telephone device using 5. The weakness according to claim 1, wherein a headset comprising a microphone and a speaker is connected to the portable wireless device, and a grip portion is formed at the base end of the support rod. A telephone device that uses radio waves.