CN113940009A - Communication system based on waveguide tube antenna - Google Patents

Abstract

The present invention provides a communication system based on a waveguide antenna, which can reliably transmit monitoring information and the like on a construction site to a monitoring center and the like through a simple structure, and can be freely installed and disassembled, thereby being reusable. A communication system based on a waveguide antenna consists of a radio wave leakage part (2) which transmits radio waves inside and leaks the radio waves from a part of the side wall, and a single pipe part (3), the single pipe part (3) The radio wave leakage part (2) and the input connector (6) are connected in a length-adjustable manner through a single-pipe pipe, and the radio wave is not leaked, and the input connector (6) is connected to the wireless access point. The leaked radio waves among the radio waves transmitted by the wireless access point perform wireless communication between the wireless device and the wireless terminal.

Description

Waveguide Antenna Based Communication System

technical field

The present invention relates to a communication system based on a waveguide antenna, and more particularly, to a communication system based on a waveguide antenna that uses a waveguide antenna having a radio wave leakage portion to leak radio waves, and is temporarily installed at a construction site such as a high-rise building. A waveguide antenna is effectively used for wireless communication in a vertical system as a waveguide, and a wireless communication network is formed by a wireless mesh network in the plane direction on each floor of a high-rise building.

Background technique

In recent construction sites such as buildings and civil engineering structures, it is desired to conduct thorough disaster prevention at each construction site and prevention of accidents of site workers by performing environmental monitoring of the construction site using various environmental sensors. In addition, it is desired to achieve high-level quality control in on-site construction by performing various on-site construction inspections and acquisition of construction data using IT equipment.

The environmental monitoring includes, for example, the measurement of meteorological conditions such as temperature, humidity, rainfall, wind direction, wind speed, and snow cover in the construction site, as well as the measurement of oxygen concentration, carbon dioxide concentration, carbon monoxide concentration, generation of toxic gases, generation of flammable gases, etc. measurement, etc. The measurement results of these environmental monitoring are preferably collected at the construction site and transmitted as communication data to a monitoring center or the like installed in the construction site or at a remote location via a wireless LAN or the like. The environment monitoring and the communication system of the measurement results can prevent the occurrence of fire in the construction site, the poisoning caused by the poisonous gas of the on-site workers, the explosion caused by the combustible gas, and the infection caused by the virus.

In addition, through the communication system for environmental monitoring and measurement results, for example, based on the measurement of meteorological data at the construction site, heavy rain, sunshine, snow, strong wind, storm, etc. can be predicted in advance, and the health of field workers such as heatstroke can be taken in advance. Countermeasures, measures for damage or destruction of building materials caused by strong winds, measures for damage to building decoration materials caused by sudden heavy rain during construction, etc.

As a system similar to the present waveguide antenna-based communication system, there is a leaky coaxial system using LCX (leaky coaxial cable). The leaky coaxial system is a radio broadcasting system that transmits radio wave signals to a terminal device or the like through a transmission cable for wireless communication, and is a system in which a slit is provided in the leaky coaxial cable and electromagnetic waves leaked from the slit are used as an antenna.

Patent Document 1 discloses a wireless communication system that can be easily installed and removed and can be suitably used for a temporary communication system of a high-rise building under construction. Here, it is described that a hollow waveguide that can be extended in the vertical direction in accordance with the progress of construction is installed inside a high-rise building, an antenna of a base station is arranged inside the hollow waveguide, and that in each floor of a high-rise building, the The waveguides respectively form openings, and cylindrical radial guides protruding toward the inside of the chamber from the circumferential edges of the openings are provided.

Patent Document 2 discloses a communication wave transmission system that allows electromagnetic waves from an access point to reach a wireless terminal and prevents indoor multipath interference. Here, the communication wave transmission medium has a rectangular or circular opening shape made of a metal material, and the effective opening size is 1/2 times or more of the wavelength of the electromagnetic wave to be propagated, and the indoor end portion of the transmission medium is It is provided with a shape that folds back into the room, and the junction of the transmission medium is shielded to prevent electromagnetic wave leakage.

(与电磁波的电场矢量的方向正交的方向上的包覆体的内表面之间的距离D)和内径

，以便以TE11模式在管轴方向上传输例如5.8GHz的微波。Patent Document 3 discloses a waveguide that takes into consideration the frequency and transmission mode of electromagnetic waves to be transmitted. Here, the outer diameter of the waveguide is set

(the distance D between the inner surfaces of the clad in the direction orthogonal to the direction of the electric field vector of the electromagnetic wave) and the inner diameter

, in order to transmit, for example, microwaves at 5.8 GHz in the TE11 mode in the direction of the tube axis.

prior art literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-159564

Patent Document 2: Japanese Patent Laid-Open Publication No. 2008-28549

Patent Document 3: Japanese Patent Laid-Open Publication No. 2016-149650

Conventionally, at construction sites, information transfer to places where telephone lines (3G, 4G, and 5G) have not been reached cannot be performed regarding environmental monitoring acquired, various on-site construction inspections using IT equipment, and transmission of construction data. In particular, it is difficult to perform communication to the upper floors of high-rise buildings covered with building materials such as concrete and steel frames that shield radio waves, and long-distance communication such as in tunnels.

This communication system based on a waveguide antenna is developed at a construction site as a communication system that uses various environmental sensors to monitor the environment of the construction site during the construction of temporary installations, not during the construction of the formal installations, and reports to the monitoring center. etc. to transmit information. Therefore, there is a demand for a system in which the production cost of the communication system itself is low and the installation and construction of the communication system are simple. In addition, it must be a sturdy device that does not easily cause malfunction or communication accident when temporarily installed at the construction site,

In addition, it must be easily attachable to other building materials at the construction site, and must be easily removable from other building materials when construction is completed. In addition, it is important not to cause damage when attaching and detaching to building materials.

Moreover, as a temporary installation material, it is necessary to store in a warehouse etc. in advance, and to be able to bring in to a construction site repeatedly and to use it. That is, not only installation and removal are easy, but also transportation itself must be easy. In addition, the problem is that the device must be reused repeatedly without performance degradation.

The communication system based on the waveguide antenna of the present invention is preferably installed in an antenna passage penetrating through the vertical system, such as a stairwell or an elevator shaft at a construction site. However, each floor of the building is composed of a wall material and a floor material made of reinforced concrete or steel-reinforced concrete, or a floor material composed of a deck board which is a composite structure of iron plate and concrete. Therefore, even in a stairwell or the like where radio waves can easily pass, when concrete or the like has a complicated shape, there is a problem that the radio waves are shielded and cannot be used as an antenna path through which the radio waves can easily pass through the vertical system. Moreover, in the case of an elevator shaft, when it is used for temporarily installing an elevator at the time of temporary installation, there exists a problem that the radio wave may be shielded and the wireless communication at the time of temporary installation becomes unstable.

In addition, in a construction site, the completion degree of the antenna path itself, such as a stairwell and an elevator hall, usually changes as the construction progresses, and there is a problem that it is necessary to deal with the change of the antenna path every time. In addition, there is a problem that each floor area to which radio waves should be transmitted may change as construction progresses, and each floor area to which the radio wave should be transmitted must be flexibly dealt with each time.

On the other hand, the leaky coaxial system using the above-mentioned LCX (leaky coaxial cable) is not in the temporary installation construction as in the present communication system, but in the actual installation construction, the functions of both the cable transmission path and the antenna are combined. Since the purpose of use of the communication system is different from that of the present apparatus, the above-mentioned problems cannot be solved.

SUMMARY OF THE INVENTION

An object of the present invention is to solve the above-mentioned problems, and to provide a communication system based on a waveguide antenna, which can use building materials that can be supplied at a construction site, and can compare the monitoring results of the construction site and the on-site construction inspection. , construction data and other information can be reliably transmitted to the monitoring center, etc., and can be freely installed and dismantled, so that it can be used repeatedly through rental, so it is suitable for temporary installation of equipment.

Another object of the present invention is to solve the above-mentioned problems, and to provide a simple communication system based on a waveguide antenna in which monitoring results of a construction site, on-site construction inspection, Information such as construction data is reliably transmitted to wireless communication networks such as monitoring centers, and flexibly responds to the progress of construction.

In order to achieve the above object, the present invention provides a communication system based on a waveguide antenna, characterized by comprising a radio wave leakage part and a single pipe part, the radio wave leakage part transmits radio waves inside and leaks the radio waves, and the single pipe part passes through The single-pipe pipe connects the radio wave leakage part and the input connector in a length-adjustable manner so that radio waves do not leak, and the input connector is connected to the wireless access point. Performs wireless communication between the wireless device and the wireless terminal device.

According to the above configuration, the communication system based on the waveguide antenna of the present invention is constituted by the radio wave leakage portion and the single pipe portion. The single-pipe portion can be produced in a free length using a single-pipe pipe commonly used for scaffolding or the like in construction sites. In addition, the connection portion can be easily produced using a flange joint generally used for connection of pipes. Therefore, the present waveguide antenna can be produced using a material that is easy to supply at a construction site without using a special material. Further, the single pipe portion, the radio wave leakage portion, and the connection portion are joined by bolts or the like. Therefore, it is possible to easily perform installation and removal in the construction site. In addition, the once-fabricated waveguide antenna has no particularly complicated details, so it can be easily reused in other construction sites after disassembly. In addition, multiple sets can be made in advance, stored, and used repeatedly by renting as needed.

Further, in the communication system based on the waveguide antenna of the present invention, the input connectors at both ends of the waveguide antenna are connected to the wireless access point, and the wireless LAN from the wireless device is transmitted to the waveguide antenna via the access point. Among the transmitted radio waves, radio waves leaking from the radio wave leaking part are used to perform wireless communication between the radio device and the radio terminal devices in the vicinity of the radio wave leaking part. That is, in the case of a high-rise building, the radio waves emitted from the wireless devices can be reliably transmitted to the respective floors by using the waveguide antenna as a waveguide in the vertical system, and can be transmitted to the wireless terminals of the respective floors via the wireless access points installed on the respective floors. machine to transmit information.

Moreover, it is preferable that the communication system based on the waveguide antenna of this invention includes the connection part which connects a radio wave leakage part and a single pipe part. Thus, the communication system based on the waveguide antenna of the present invention is constituted by the radio wave leakage portion, the single pipe portion, and the connection portion.

Further, in the communication system based on the waveguide antenna, it is preferable that the radio wave leakage part is provided with a groove for allowing radio waves to leak, and the single pipe part is preferably provided with a flange joint as a connecting metal fitting to the single pipe pipe used at the construction site. Accordingly, the waveguide antenna of the present invention can be produced using a material that is easy to supply at a construction site without using a special material. In addition, by connecting the respective constituent elements to each other by bolting, it is possible to easily attach and detach at the construction site. In addition, the above-mentioned connecting metal fittings are not limited to flange joints, and may be other connecting metal fittings.

Further, in the communication system based on the waveguide antenna, it is preferable that the radio wave leakage portion and the single tube portion are alternately arranged to form one unit, and a plurality of units are connected to form a waveguide antenna of arbitrary length. Thereby, the length of the waveguide antenna can be freely adjusted without unnecessary leakage of radio waves from the waveguide antenna, and the radio waves can be reliably transmitted inside the waveguide.

In addition, in the communication system based on the waveguide antenna, it is preferable that the flange joint of the connection portion can be easily adjusted in length by preparing rings for size adjustment with different plate thicknesses and using any of them. As a result, the length can be adjusted at the construction site, and radio waves can be transmitted to any position on each floor.

In addition, in the communication system based on the waveguide antenna, it is preferable that a corrugated portion or a curved pipe which can correspond to a curved line or a broken line is attached to the connecting portion. Thereby, the construction error in the construction site can be absorbed, and the radio wave can be transmitted to an arbitrary position. Furthermore, in case the antenna paths are bent or bent, the waveguide antenna can be made to follow them.

Further, in the communication system based on the waveguide antenna, it is preferable that the radio wave leakage portion is made of aluminum, stainless steel, or copper, and that the single pipe portion is galvanized. As a result, the surface of the waveguide antenna such as the radio wave leakage portion and the single-pipe portion is smoother, and it is possible to transmit efficiently inside the waveguide antenna.

In addition, in the communication system based on the waveguide antenna, it is preferable that in a multi-story building, it is temporarily installed in an antenna passage extending in the longitudinal direction, and the radio wave is leaked through at least one radio wave leakage part in the floor where the radio wave is transmitted, A single tube portion without a slot is used in a layer that does not transmit radio waves. As a result, the radio waves can be intensively transmitted only in the layer where the radio waves are transmitted, and the efficiency of wireless communication can be improved.

Further, in the communication system based on the waveguide antenna, it is preferable that the leaked radio waves are transmitted to the wireless access points installed on each floor, and the radio waves are transmitted from the wireless access points to each wireless terminal through the wireless mesh network installed on each floor. . Thereby, by forming a wireless mesh network of a communication system using a waveguide antenna, radio waves can be reliably transmitted from the lower floor to the upper floor or to the end of each floor in a high-rise building or the like. In the past, the wireless mesh network in the high-rise building was constructed in each floor including the upper and lower floors, but the wireless mesh network is not suitable for communication of the vertical system of the high-rise building due to the existence of obstructions. However, this problem can be solved by using waveguides for communication in longitudinal systems. In addition, although the same effect can be obtained by using LCX for a vertical system, the present waveguide antenna has advantages in comparison with LCX in which there is a risk of disconnection because the robustness of the system is required in the construction site.

Further, in the communication system based on the waveguide antenna, it is preferable that the single-pipe portion is fixed to the temporary installation material in the antenna passage or the iron portion fixed to the deck plate by means of a clamp. Thereby, the single-pipe portion of the waveguide antenna can be effectively used, and it can be easily fixed to a temporary installation material, a deck board, or the like.

Further, the communication system based on the waveguide antenna preferably includes an input connector at the end, and transmits radio waves by connecting a wireless access point connected to the wireless LAN and the input connector through a coaxial cable. As a result, a coaxial cable or the like having good followability to a curve can be used for connection to the input connector at the end. In addition, the connection between the wireless access point and the input connector is not limited to the coaxial cable, and other connection members may be used.

Further, in the communication system based on the waveguide antenna, it is preferable that at least one radio wave leakage portion is arranged in the antenna path extending in the plane direction from the wireless access point, and the radio waves are transmitted in the plane direction. Thus, by effectively utilizing the present invention together with a waveguide, a wireless mesh network that transmits a wireless LAN to each wireless terminal in a high-rise building can be constructed.

Further, in the communication system based on the waveguide antenna, it is preferable that waveguide antennas composed of a plurality of systems are arranged in each antenna path in the vertical system or in the plane direction, and each waveguide antenna transmits its own information to a high-rise building. The communication system of each wireless terminal within the system. As a result, as a communication system using a waveguide antenna, for example, the first waveguide antenna can transmit the monitoring results of the construction site, and the other waveguide antennas such as the second or third can separately transmit information such as on-site construction inspection and construction data. Can avoid the interference of radio waves.

Further, in the communication system based on the waveguide antenna, it is preferable that each waveguide antenna has a dedicated wireless access point. Thereby, the monitoring results of the construction site can be transmitted using the first wireless access point, and information such as on-site construction inspection and construction data can be separately transmitted using other wireless access points such as the second or third, thereby avoiding radio wave interference and the like.

Furthermore, in the communication system based on the waveguide antenna, it is preferable that each waveguide antenna is connected to a dedicated environmental sensor installed in a multi-storey building, and the collected environmental data is transmitted to the data center. Thereby, the waveguide antenna which performs data communication can be made different for each environmental sensor, and interference of radio waves etc. can be avoided.

Another object of the present invention is to solve the above-mentioned problems, and to provide a simple communication system based on a waveguide antenna that can reliably transmit monitoring information and the like at a construction site to a monitoring center based on the waveguide antenna. and other wireless communication networks to flexibly respond to the progress of construction.

As described above, according to the communication system based on the waveguide antenna of the present invention, it is possible to provide a communication system based on the waveguide antenna in which the monitoring results, on-site construction inspections, and construction data of the construction site are recorded using the construction materials that can be supplied at the construction site. Such information can be reliably transmitted to a monitoring center, etc., and can be freely installed and dismantled, and can be used repeatedly through rental, so that it can be used for temporarily installed equipment.

In addition, according to the communication system based on the waveguide antenna of the present invention, it is possible to provide a communication system based on a simple waveguide antenna that uses the waveguide antenna to reliably obtain information such as monitoring results of construction sites, site construction inspections, and construction data. It is transmitted to a wireless communication network such as a monitoring center to flexibly respond to the progress of construction.

Description of drawings

FIG. 1 is a side view showing a schematic component configuration of an embodiment of the waveguide antenna of the present invention.

2 is a perspective view and a side view showing the shape and structure of a radio wave leakage portion of the waveguide antenna.

3 is a perspective view and a cross-sectional view showing the shape and structure of a single tube portion of the waveguide antenna.

4 is a perspective view, a cross-sectional view, and a side view of a corrugated portion showing the shape and structure of the connection portion of the waveguide antenna.

5 is a perspective view showing the shape and structure of the input connector of the waveguide antenna.

FIG. 6 is an explanatory diagram showing an embodiment of a wireless communication system in which a waveguide is provided in an antenna path.

FIG. 7 is an explanatory diagram showing an evaluation result on the second floor of a high-rise building in which a waveguide antenna is not installed.

FIG. 8 is an explanatory diagram showing an evaluation result on the ninth floor of a high-rise building in which a waveguide antenna is not installed.

FIG. 9 is an explanatory diagram showing an evaluation result on the second floor of a high-rise building in which a waveguide antenna is installed.

FIG. 10 is an explanatory diagram showing an evaluation result on the ninth floor of a high-rise building in which a waveguide antenna is installed.

Detailed ways

(Structure of waveguide antenna)

Hereinafter, the waveguide antenna 1 of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic configuration of an embodiment of the waveguide antenna 1 of the present invention by a component configuration diagram. In FIG. 1( a ), as the component configuration of the waveguide antenna 1 , a radio wave leaking portion 2 that leaks radio waves and connecting portions 4 provided at both ends of the radio wave leaking portion 2 are shown. A slot 7 is provided in the radio wave leakage portion 2 . 1( b ) shows the basic unit of the waveguide antenna 1 , which is formed by connecting the single tube portion 3 to the component structure of FIG. 1( a ) and connecting the input connector 6 to the end of the waveguide antenna 1 . 1( c ) shows the component configuration of the waveguide antenna 1 including the three radio wave leakage portions 2 .

Thus, the waveguide antenna 1 of the present invention is constituted by the radio wave leakage portion 2 , the connection portion 4 , and the single tube portion 3 as a basic unit. By repeatedly connecting the basic units, a predetermined length can be obtained. The waveguide antenna 1 can be used as a wireless communication system at the construction site by installing the waveguide antenna 1 in the antenna passage extending along the vertical system at the construction site. Here, "the antenna passage extending in the vertical system in the construction site" means that the waveguide antenna 1 can be extended in the vertical system in the construction site of a high-rise building, such as a stairwell, elevator shaft, etc., so that the radio wave can be An antenna path leaking from the radio wave leakage portion 2 in each predetermined layer. Here, the radio wave propagates inside the waveguide antenna 1 rather than the inside of the antenna passage, which is different from the case of using a steel column, a mast of a crane, and a metal pipe as a hollow waveguide as in Patent Document 1.

(Structural components of waveguide antennas)

2 to 6 show the shape and function of each component of the waveguide antenna 1 . FIG. 2( a ) is a perspective view of the radio wave leakage portion 2 , and FIG. 2( b ) is a side view of the radio wave leakage portion 2 . FIG. 3 is a perspective view and a cross-sectional view showing the shape and structure of the single-pipe portion 3 . FIGS. 4( a ) and 4 ( b ) are a perspective view and a cross-sectional view showing the shape and structure of the connection portion 4 . Moreover, FIG.4(c) shows the corrugated part 14 used for the connection part 4 in order to correspond to a curved surface. FIG. 5 is a perspective view showing the shape and structure of the input connector 6 .

As shown in FIGS. 2( a ) and 2 ( b ), in a part of the radio wave leakage portion 2 , slot holes 7 are provided at two locations. The slot holes 7 are provided at angles opposite to each other with respect to the main axis, so that the radio waves propagating in the radio wave leakage portion 2 are easily leaked.

FIG. 3 shows the single-pipe portion 3 , a jig 5 a for connecting one end of the single-pipe portion 3 to the connection portion 4 , and a jig 5 b for connecting the other end of the single-pipe portion 3 to the input connector 6 . As shown in FIG. 3( a ), the clamps 5 a and 5 b are provided with clamp fixing bolt holes 23 . In addition, the jig itself is fixed to the single-pipe portion 3 by the jig fixing bolts 22 . In addition, the clamps 5a and 5b are provided with connecting bolt holes 25, and the single pipe portion 3, the connecting portion 4, and the input connector 6 are respectively connected by the connecting bolts 24.

The single-pipe portion 3 can directly use the single-pipe pipe 9 commonly used for temporary installations and the like in construction sites. In addition, the jigs 5a, 5b can also be used as they are for blocks 5a, 5b that are commonly used for temporary installations and the like in construction sites. Therefore, at the construction site, the waveguide antenna 1 can be produced from building materials that are used on a daily basis. Furthermore, the remaining single pipe 9 and the clamps 5a, 5b can be returned to the construction site for use.

FIG. 4 shows the connecting portion 4 . FIG. 4( a ) is a perspective view of the connection portion 4 , and FIG. 4( b ) is a cross-sectional view of the connection portion 4 . In this connection part 4, since one end is connected to the radio wave leakage part 2 and the other end is connected to the clamps 5a and 5b of the single pipe part 3, flange joints 8a and 8b are provided at both ends, and the flange Connection bolt holes 25 are provided in the connection direction of the joints 8 a and 8 b , and the connection bolts 24 are used to connect components connected in each direction. In the flange joints 8a and 8b of the connection portion 4, as shown in FIG. 4(b) , the length adjustment of the connection portion 4 can be performed by preparing size adjustment rings 10 with different plate thicknesses and using any of them.

Moreover, as shown in FIG.4(c), the corrugated part 14 can be provided in the connection part 4 corresponding to the case where it changes in a curve shape. The corrugated portion 14 uses a member such as a flexible hose that can freely correspond to a curved line or a broken line. Then, the corrugated portion 14 is sealed so as not to leak the radio waves flowing through the connection portion 4 . By effectively utilizing the corrugated portion 4, even if the linearity of the antenna path changes, it can sufficiently cope with it.

FIG. 5 shows the shape and structure of the input connector 6 of the waveguide antenna 1 . A connector portion 18 is provided at the front end of the input connector 6 and is connected to the wireless access point 16 via a coaxial cable 17 . In addition, there are connecting bolt holes 25 to which the jigs 5 a and 5 b of the single pipe portion 3 are connected by connecting bolts 24 .

(Communication system using waveguide)

FIG. 6 shows an embodiment of a wireless communication system in which the waveguide 1 is provided in the antenna path. When the waveguide antenna 1 is used in a wireless communication system in the longitudinal direction of a high-rise building, it is referred to as a waveguide 1 in this specification. In FIG. 6, the monitoring of the wireless mesh network 36 based on the B layer 27 and the environmental sensor 30, etc. in the continuous A layer 26, B layer 27, C layer 28 of the high-rise building is performed, and the monitoring results are transmitted to the monitoring Center etc.

A wireless access point 16 connected to the wireless LAN is provided at the end of the waveguide 1 , and the waveguide 1 is connected to the wireless access point 16 through a coaxial cable 17 . Alternatively, the waveguide 1 may be directly connected to the wireless access point 16 . In the B layer 27 , the radio waves leaked from the waveguide 1 are transmitted to the wireless access point 16 of the B layer 27 , and transmitted to the wireless mesh network 36 of the wireless terminals 35 of the B layer 27 .

On the other hand, in the B layer 27 , the environmental sensor 30 including the environmental sensor main body 31 and, for example, a temperature sensor box 32 , a combustible gas sensor box 33 , a virus detection box 34 , and the like communicate wirelessly with the waveguide 1 . The environment measuring device such as the temperature sensor box 32 monitors the labor environment at the construction site, and transmits the monitoring result to the monitoring center or the like. In addition, the construction status and the like can be grasped by monitoring cameras 29 and the like installed on the construction site. In addition, the on-site construction inspection and construction data can be wirelessly communicated with a monitoring center or the like using the waveguide 1 .

(Evaluation results based on waveguide)

FIG. 7 shows the evaluation results of the radio wave measurement on the second floor of the high-rise building in which the waveguide 1 is not installed. In addition, FIG. 8 shows the evaluation result of the radio wave measurement in the 9th floor of the high-rise building in which the waveguide 1 was not installed. In addition, FIG. 9 shows the evaluation result of the radio wave measurement in the 2nd floor of the high-rise building in which the waveguide 1 was installed. In addition, FIG. 10 shows the evaluation result of the radio wave measurement in the 9th floor of the high-rise building in which the waveguide 1 was installed. This evaluation was performed on the 2nd and 9th floors of a 9-story high-rise building. 7 and 8 show the case where the waveguide 1 is not provided in the antenna path such as the elevator shaft or stairwell, and FIGS. 9 and 10 show the case where the waveguide 1 is provided in the antenna path such as the elevator shaft and the stairwell, depending on whether the waveguide is provided or not. 1. Measure the received power level or the intensity of the radio waves in the corridor by RSSI (dB), and use six levels (30dB or more, 25~29dB, 20~24dB, 15~19dB, 15~19dB, 10~14dB, 9dB below) show the evaluation results.

In the measurement of two floors with high reception level, when the waveguide 1 is not installed as shown in FIG. 7 , the maximum is 20 to 24 dB in the corridor around the stairwell, but 10 to 14 dB in the room enclosed by the wall. On the other hand, when the waveguide 1 is installed as shown in FIG. 10 , the maximum is 30 dB or more in the corridor around the stairwell, and it is 15 to 19 dB even in the room enclosed by the wall. Effect.

In the nine layers where the reception level is low, in the case where the waveguide 1 in FIG. 8 is not provided, the reception power level is almost 9 dB or less. On the other hand, when the waveguide 1 is installed as shown in FIG. 9 , the maximum value is 30 dB or more in the corridor around the stairwell, and it can be seen that the received power level corresponding to the second floor is maintained.

According to the evaluation results of the radio wave measurement of these high-rise buildings, when the waveguide 1 was used, the received power level in the high-rise building was hardly decreased, so it was proved that the waveguide 1 had stable characteristics in the height direction.

The structure, shape, size, and arrangement relationship of the waveguide antenna 1 or the waveguide 1 described in the above-described embodiments are only schematically shown to the extent that the present invention can be understood and implemented. Therefore, the present invention is not limited to the described embodiments, and can be changed into various forms without departing from the scope of the technical idea shown in the claims.

Description of reference numerals

1 Waveguide Antenna or Waveguide, 2 Radio Wave Leakage Parts, 3 Single Tube Parts, 4 Connection Parts, 5a, 5b Clamps, 6 Input Connectors, 7 Slots, 8a, 8b Flange Joints, 9 Single Tube Pipes, 10 Size Adjustments Ring, 14 Corrugated Parts, 16 Wireless Access Points, 17 Coaxial Cables, 18 Connector Parts, 22 Clamp Fixing Bolts, 23 Clamp Fixing Bolt Holes, 24 Attachment Bolts, 25 Attachment Bolt Holes, 26A Layer, 27B Layer, 28C Layer , 29 surveillance cameras, 30 environmental sensors, 31 environmental sensor bodies, 32 temperature sensor boxes, 33 combustible gas sensor boxes, 34 virus detection boxes, 35 wireless terminals, 36 wireless mesh networks.

Claims (15)

1. A communication system using a waveguide antenna, comprising a radio wave leakage unit for transmitting radio waves inside and leaking the radio waves, and a single pipe unit for connecting the radio wave leakage unit to an input connector via a single pipe so as to be adjustable in length and preventing the leakage of the radio waves, wherein the input connector is connected to a radio access point, and radio communication between a radio device and a radio terminal is performed by the leaked radio waves among the radio waves transmitted from the radio access point.

2. The waveguide-antenna-based communication system according to claim 1, comprising a connection portion connecting the electric wave leakage portion and the single-tube portion.

3. The waveguide-antenna-based communication system according to claim 1 or 2, wherein the electric wave leakage portion is provided with a groove for leaking the electric wave, and the single pipe portion is provided with a flange joint as a connecting metal member on the single pipe used at a construction site.

4. A waveguide antenna-based communication system according to any one of claims 1 to 3, wherein the radio wave leakage part and the single-tube part are alternately arranged to form one unit, and a plurality of units are connected to form a waveguide antenna of any length.

5. A waveguide antenna-based communication system according to any one of claims 2 to 4, wherein the flange joint of the connection portion is adjusted in length by preparing size adjustment rings having different plate thicknesses and using any one of them.

6. A waveguide antenna based communication system according to any of claims 2 to 5, wherein a corrugated portion or a bent pipe is attached to the connection portion so as to be freely corresponding to a curved line or a broken line.

7. A waveguide antenna-based communication system according to any one of claims 1 to 6, wherein the radio wave leaking portion is made of aluminum, stainless steel or copper, and the single-tube portion is galvanized.

8. A waveguide antenna-based communication system according to any one of claims 1 to 7, wherein an antenna path extending in a vertical system is provided as a temporary installation in a multi-story building, the radio wave is leaked by at least one of the radio wave leaking portions in a story transmitting the radio wave, and the single-pipe portion having no slot is used in a story not transmitting the radio wave.

9. The waveguide antenna-based communication system according to claim 1, wherein the leaked electric wave is transmitted to the wireless access points provided in the respective layers, and the electric wave is transmitted from the wireless access points to the wireless terminals via wireless mesh networks provided in the respective layers.

10. A waveguide antenna based communication system according to claim 1 or 2, wherein the single tube part is secured by clamping means to a temporary setting material in the antenna passage or to an iron part of the deck plate.

11. A waveguide antenna-based communication system according to any one of claims 1 to 3, comprising an input connector at an end portion, wherein a wireless access point connected to a wireless LAN and the input connector are connected by a coaxial cable to transmit an electric wave.

12. The waveguide antenna-based communication system according to claim 4, wherein at least one of the electric wave leakage portions is disposed in an antenna path extending in a planar direction from the radio access point, and transmits the electric wave in the planar direction.

13. A waveguide antenna-based communication system according to any one of claims 1 to 5, wherein the waveguide antennas of a plurality of systems are arranged in respective antenna paths in a longitudinal system or a planar direction, and the respective waveguide antennas are communication systems for transmitting respective information to the respective wireless terminals in a high-rise building.

14. A waveguide antenna based communication system according to claim 6, wherein each waveguide antenna has a dedicated radio access point.

15. The waveguide antenna based communication system according to claim 8, wherein each of the waveguide antennas is connected to a dedicated environment sensor provided in the multi-story building, and transmits the collected environment data to a data center.

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