CN113940009B - Communication System Based on Waveguide Antenna - Google Patents

Abstract

The present invention provides a communication system based on a waveguide antenna, which reliably transmits monitoring information on a construction site to a monitoring center and the like through a simple structure, can be freely installed and disassembled, and can be used repeatedly. A communication system based on a waveguide antenna is composed of a radio wave leakage part (2) and a radio wave non-leakage part (3). The leaking part (3) connects the radio wave leaking part (2) and the input connector (6) through a single pipe in a freely adjustable length, and prevents radio waves from leaking, and the input connector (6) is connected to the wireless access point, Wireless communication between a wireless device and a wireless terminal is performed by leaking radio waves among radio waves transmitted from a wireless access point.

Description

Communication System Based on Waveguide Antenna

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 that has a radio wave leaking portion to leak radio waves and is temporarily installed at a construction site such as a high-rise building The waveguide antenna is effectively used for vertical system wireless communication as a waveguide, and a wireless communication network is formed by a planar wireless mesh network on each floor of a high-rise building, and it can also be used as it is for formally installed equipment.

Background technique

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

This environmental monitoring includes, for example, the measurement of meteorological conditions such as temperature, humidity, rainfall, wind direction, wind speed, and snow accumulation at the construction site, as well as monitoring of oxygen concentration, carbon dioxide concentration, carbon monoxide concentration, generation of toxic gas, and generation of flammable gas. Determination etc. The measurement results of these environmental monitoring are preferably collected at the construction site and transmitted as communication data via a wireless LAN or the like to a monitoring center or the like installed in the construction site or at a remote location. This communication system for environmental monitoring and measurement results can prevent fires at construction sites, poisoning of site workers by toxic gases, explosions by flammable gases, and infection by viruses.

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

As a system similar to this waveguide antenna-based communication system, there is a leaky coaxial system using LCX (Leaky Coaxial Cable). The leaky coaxial system is a wireless broadcasting system that transmits radio signals to terminal devices and the like through a transmission cable for wireless communication, and is a system in which a leaky coaxial cable is provided with a slit and electromagnetic waves leaking from the slit are used as an antenna.

Patent Document 1 discloses a wireless communication system that is easy to install and remove, and can be suitably used as a temporary communication system for 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 a hollow waveguide is placed on each floor of the high-rise building. Each of the waveguides forms openings, and cylindrical radiation guides protruding from the peripheral edges of the openings toward the interior of the chamber are respectively 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 is a rectangular or circular opening shape made of a metal material, the effective opening size is more than 1/2 times the wavelength of the electromagnetic wave to be propagated, and the indoor end of the transmission medium is The shape that turns back into the room is provided, 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 considers the frequency and propagation mode of electromagnetic waves to be transmitted. Here, the waveguide sets the outer diameter

(the distance D between the inner surfaces of the covering body in the direction perpendicular to the direction of the electric field vector of the electromagnetic wave) and the inner diameter

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

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 a construction site, it was not possible to transfer information to locations that were not reached by telephone lines (3G, 4G, 5G) regarding acquired environmental monitoring, various on-site construction inspections using IT equipment, and transmission of construction data. In particular, communication to the upper floors of high-rise buildings covered with building materials that shield radio waves, such as concrete and steel frames, and long-distance communication in tunnels, etc., are difficult.

This waveguide antenna-based communication system was developed at the initial construction site as a communication system that monitors the environment of the construction site by using various environmental sensors during temporary installation and construction, not during the construction of formally installed equipment, and reports to the monitoring Center, etc. to transmit information. Therefore, there is a demand for a system in which the manufacturing 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 robust device that does not easily cause malfunctions or communication accidents when temporarily installed at a construction site.

In addition, it must be easy to attach to other construction materials at the construction site, and be easily detachable from other construction materials after construction is completed. Furthermore, it is important not to cause damage during installation and removal of building materials.

In addition, as the temporary installation material, it must be stored in a warehouse or the like in advance and can be repeatedly brought to the construction site and used. That is, not only installation and disassembly must be simple, but also transportation itself must be easy. In addition, there is a problem that it must be a device that is repeatedly reused without performance degradation.

This waveguide antenna-based communication system is preferably installed in an antenna passage penetrating through a vertical system, such as a stairwell or an elevator shaft at a construction site. However, each floor of the building is composed of reinforced concrete or steel-reinforced concrete wall materials, floor materials, or floor materials composed of deck plates that are composite structures of iron plates and concrete. Therefore, even in stairwells where radio waves easily pass, if concrete or the like has a complicated shape, radio waves are shielded and there is a problem that the vertical system antenna path cannot be easily passed by radio waves. In addition, in the case of an elevator shaft, when it is used to temporarily install an elevator during temporary installation, there is a problem that radio waves may be shielded and wireless communication during temporary installation may be unstable.

Also, at a construction site, the degree of completion of the antenna path itself, such as a stairwell or an elevator hall, usually changes with the progress of construction, and there is a problem of having to deal with changes in the antenna path every time. In addition, as the construction progresses, the area of each floor where radio waves should be transmitted may change, and there is a problem that it is necessary to flexibly respond to the change of each floor area where radio waves are transmitted.

On the other hand, the leaky coaxial system using the above-mentioned LCX (Leaky Coaxial Cable) is not a temporary installation construction like this communication system, but a combination of the functions of both the cable transmission path and the antenna during the actual installation construction. Since the purpose of use of the communication system is different from that of this device, the above-mentioned problems cannot be solved.

Contents of the invention

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

Another object of the present invention is to solve the above-mentioned problems and provide a simple communication system based on a waveguide antenna. The simple communication system based on a waveguide antenna forms the monitoring results of the construction site, on-site construction inspection, Information such as construction data is reliably transmitted to a wireless communication network such as a monitoring center, 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, which is characterized in that it has a radio wave leaking part, a radio wave non-leaking part, a clamp and a connecting part, and the radio wave leaking part transmits radio waves inside and makes the Radio wave leakage, the radio wave non-leakage part connects the radio wave leaking part and the input connector in a length-adjustable manner through a single-tube pipe, and prevents the radio wave from leaking, and the input connector is connected to a wireless access point performing wireless communication between the wireless device and the wireless terminal by using the leaked radio waves in the radio waves transmitted from the wireless access point, and the clamp is fixed to the single tube by clamping the single tube Near the end of the pipe, the clamp has a connecting bolt hole into which the connecting bolt is inserted, the connecting part has a first end and a second end, the first end is fixed to the clamp, The first end portion has a joint that engages with and covers the periphery of the tip portion of the single-pipe pipe, the joint has a connection bolt hole that is inserted into the joint of the joint bolt hole, the connection part is fixed to the fixture by the connecting bolt inserted into the connection bolt hole of the joint and the fixture, the second end is fixed to the radio wave leakage part, and the second end is fixed to the electric wave leakage part. The two ends have flange joints, and the flange joints are fixed to the radio wave leakage part, and any one of the corrugated part and the curved pipe freely corresponding to any one of the curve and the broken line is installed on the connection part. The leakage part is provided with two slots which are arranged to have angles in opposite directions with respect to the main axis of the radio wave leakage part.

According to the above configuration, the waveguide antenna-based communication system of the present invention is composed of a radio wave leaking unit and a radio wave non-leaking unit. The radio wave non-leakage part can be manufactured in a free length using a single-pipe pipe commonly used for scaffolding or the like at a construction site. In addition, the connecting portion can be easily produced using a flange joint generally used for connecting 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. In addition, the radio wave non-leakage part, the radio wave leak part and the connection part are joined by bolts or the like. Therefore, installation and removal can be easily performed at a construction site. In addition, waveguide antennas made at one time can be easily reused in other construction sites after disassembly because they do not have particularly complicated details. In addition, multiple sets can be made in advance and stored, and can be used repeatedly by renting out as needed.

In addition, in the communication system using 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, the radio waves leaked from the radio wave leaking part perform wireless communication between the wireless device and the wireless terminal devices around the radio wave leaking part. That is, in the case of a high-rise building, the radio wave emitted from the wireless device can be reliably transmitted to each floor using the waveguide antenna as a waveguide in the longitudinal system, and can be sent to the wireless terminal on each floor via the wireless access point installed on each floor. machine for information transfer.

Furthermore, the waveguide antenna-based communication system according to the present invention preferably includes a connecting section connecting the radio wave leaking section and the radio wave non-leaking section. Thus, the communication system using the waveguide antenna of the present invention is constituted by a radio wave leaking part, a radio wave non-leaking part, and a connecting part.

In addition, 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 wave leakage, and the radio wave non-leakage part is provided with a flange joint as a connecting metal fitting on the single pipe used at the construction site. Accordingly, the waveguide antenna of the present invention can be produced using materials that are easy to supply at a construction site without using special materials. In addition, by connecting each constituent element to each other with bolts, it is possible to easily perform attachment and detachment at a construction site. In addition, the above-mentioned connecting metal parts are not limited to flange joints, and may also be other connecting metal parts.

In addition, in a communication system using a waveguide antenna, it is preferable that radio wave leaking parts and radio wave non-leaking parts are arranged alternately to form a unit, and that a waveguide antenna of any length can be formed by connecting a plurality of units. Accordingly, the length of the waveguide antenna can be freely adjusted without unnecessary leakage of radio waves from the waveguide antenna, and radio waves can be reliably transmitted inside the waveguide.

In addition, in a communication system using a waveguide antenna, it is preferable that length adjustment can be easily performed by preparing dimension adjustment rings having different plate thicknesses in the flange joint of the connection portion and using any one of them. Thereby, length adjustment can be performed on a construction site, and radio waves can be transmitted to arbitrary positions on each floor.

In addition, in a communication system using a waveguide antenna, it is preferable that a corrugated portion or a bent pipe that can be freely matched to a curve or a broken line is attached to the connection portion. Thereby, construction errors in the construction site can be absorbed, and radio waves can be transmitted to arbitrary positions. Furthermore, in case of bends or bends in the antenna paths, it is possible to make the waveguide antenna follow them.

In addition, in the communication system based on the waveguide antenna, it is preferable that the radio wave leakage part is made of aluminum, stainless steel or copper, and that the radio wave non-leakage part is galvanized. Thereby, the surface of the waveguide antenna such as the radio wave leaking portion and the radio wave non-leakage portion becomes smoother, enabling efficient transmission inside the waveguide antenna.

In addition, the communication system based on the waveguide antenna is preferably installed in the antenna path extending along the longitudinal system as a temporary installation in a multi-storey building, and the radio wave is leaked through at least one radio wave leakage part in the layer where the radio wave is transmitted, A radio wave non-leakage portion having no slot hole is used in the layer that does not transmit radio waves. Accordingly, it is possible to intensively transmit radio waves only in the layer that transmits radio waves, thereby improving the efficiency of wireless communication.

In addition, 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. . Thus, by forming a wireless mesh network of a communication system using a waveguide antenna, it is possible to reliably transmit radio waves from a lower floor to an upper floor or to the end of each floor in a high-rise building or the like. Conventionally, the wireless mesh network in this high-rise building is constructed in each floor including the upper and lower floors, but this wireless mesh network is not suitable for communication of the vertical system of the high-rise building due to the presence of occluders. However, this problem can be solved by using waveguides for the communication of the longitudinal system. In addition, although the same effect can be obtained by using LCX in a vertical system, since robustness of the system is required at a construction site, this waveguide antenna has an advantage compared with LCX which has a risk of disconnection.

In addition, in the communication system based on the waveguide antenna, it is preferable that the radio wave non-leakage part is fixed to a temporary installation material in the antenna passage or an iron part fixed to the deck plate with a clamping tool. Thereby, the radio wave non-leakage part of the waveguide antenna can be effectively utilized, and it can be easily fixed to a temporary installation material, a deck board, etc.

Furthermore, it is preferable that the waveguide antenna-based communication system includes an input connector at the end, and a wireless access point connected to the wireless LAN is connected to the input connector with a coaxial cable to transmit radio waves. 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 a coaxial cable, and other connection means may be used.

In addition, in the waveguide antenna-based communication system, it is preferable that at least one radio wave leaking portion is arranged in the antenna path extending from the wireless access point in the planar direction to transmit radio waves in the planar direction. Thus, by utilizing the present invention together with waveguides, it is possible to construct a wireless mesh network that transmits wireless LAN to each wireless terminal in a high-rise building.

In addition, in the communication system based on waveguide antennas, it is preferable that waveguide antennas composed of multiple systems are arranged in each antenna path in the vertical system or planar direction, and each waveguide antenna transmits its own information to high-rise buildings. The communication system of each wireless terminal in the network. Thus, as a communication system using a waveguide antenna, for example, the monitoring results of the construction site can be transmitted through the first waveguide antenna, and information such as on-site construction inspection and construction data can be separately transmitted through other waveguide antennas such as the second or third, It can avoid the interference of radio waves, etc.

In addition, in the communication system based on waveguide antennas, it is preferable that each waveguide antenna has a dedicated wireless access point. Thus, the first wireless access point can be used to transmit the monitoring results of the construction site, and other wireless access points such as the second or third can be used to separately transmit information such as on-site construction inspections and construction data, thereby avoiding radio wave interference and the like.

In addition, in the communication system based on waveguide antennas, it is preferable that each waveguide antenna is connected to a dedicated environmental sensor installed in a multi-storey building, and transmits the collected environmental data to the data center. In this way, the waveguide antenna for performing data communication can be different for each environmental sensor, and interference of radio waves and the like can be avoided.

Another object of the present invention is to solve the above problems and provide a simple waveguide antenna-based communication system that reliably transmits monitoring information on the construction site to the 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 waveguide antenna-based communication system of the present invention, it is possible to provide a waveguide antenna-based communication system that uses building materials that can be supplied at the construction site to store monitoring results at the construction site, site construction inspections, and construction data. Such information can be reliably transmitted to the monitoring center, etc., and can be freely installed and removed, and can be used repeatedly through rental, so that it can be used for temporarily installed equipment, and can also be used for formally installed equipment as it is.

In addition, according to the waveguide antenna-based communication system of the present invention, it is possible to provide a simple waveguide antenna-based communication system that forms information such as monitoring results of construction sites, site construction inspections, and construction data reliably using waveguide antennas. 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 a 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 radio wave non-leakage 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 a connection portion of the waveguide antenna.

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

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

FIG. 7 is an explanatory view showing evaluation results on the second floor of a high-rise building in which no waveguide antenna is installed.

FIG. 8 is an explanatory view showing evaluation results on the ninth floor of a high-rise building in which no waveguide antenna is installed.

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

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

Detailed ways

(Structure of waveguide antenna)

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

Thus, the waveguide antenna 1 of the present invention is composed of the radio wave leaking portion 2 , the connection portion 4 and the radio wave non-leakage portion 3 as basic units. A predetermined length can be obtained by repeatedly connecting the basic units. By installing this waveguide antenna 1 in the antenna path extending systematically in the longitudinal direction at the construction site, it can be used as a wireless communication system at the construction site. Here, the "antenna path extending longitudinally in the construction site" means that the waveguide antenna 1 can extend longitudinally in a construction site such as a high-rise building, such as a stairwell, an elevator shaft, etc. The antenna path leaked from the radio wave leaking part 2 in each predetermined layer. Here, radio waves are propagated inside the waveguide antenna 1 instead of the antenna path, so it is different from the case where a steel column, a crane mast, or a metal pipe is used 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 . (a) of FIG. 2 is a perspective view of the radio wave leaking part 2, and FIG. 2(b) is a side view of the radio wave leaking part 2. As shown in FIG. FIG. 3 is a perspective view and a cross-sectional view showing the shape and structure of the radio wave non-leakage portion 3 . FIG. 4( a ) and FIG. 4( b ) are perspective views and cross-sectional views showing the shape and structure of the connecting portion 4 . In addition, (c) of FIG. 4 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 FIG. 2( a ) and FIG. 2( b ), slots 7 are provided at two places in a part of the radio wave leakage portion 2 . The slots 7 are provided at angles opposite to each other with respect to the main axis so that the radio waves propagating inside the radio wave leaking portion 2 can easily leak.

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

This radio wave non-leakage portion 3 can directly use the single-tube pipe 9 that is often used for temporary installations and the like at construction sites. In addition, the jigs 5a, 5b which are commonly used for temporary installations etc. at a construction site can also be used as it is. Therefore, at the construction site, the waveguide antenna 1 can be fabricated from building materials used in daily life. Furthermore, the remaining monopipe pipe 9 and clamps 5a, 5b can be returned to the construction site for use.

FIG. 4 shows the connecting portion 4 . (a) of FIG. 4 is a perspective view of the connection part 4, and (b) of FIG. 4 is a cross-sectional view of the connection part 4. As shown in FIG. 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 jigs 5a, 5b of the radio wave non-leakage part 3, flange joints 8a, 8b are provided at both ends. Connecting bolt holes 25 are provided in the connecting direction of the flange joints 8a and 8b, and are connected to components connected in various directions through connecting bolts 24 . In the flange joints 8a and 8b of the connecting part 4, as shown in FIG.

Moreover, as shown in FIG.4(c), corrugated part 14 can be provided in this connection part 4 so that it may change in a curve shape. For the corrugated portion 14, a member such as a flexible hose that can freely correspond to a curve or a folded line is used. In addition, the corrugated portion 14 is sealed so that the radio wave flowing through the connection portion 4 does not leak. By making effective use of the corrugated portion 14, even if the linearity of the antenna path changes, it can sufficiently cope.

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 tip of the input connector 6 and is connected to the wireless access point 16 via the coaxial cable 17 . Moreover, it has the connection bolt hole 25 which connects with the jig|tool 5a, 5b of the radio wave non-leakage part 3 by the connection bolt 24. As shown in FIG.

(communication system using waveguide)

FIG. 6 shows an embodiment of a wireless communication system in which a waveguide 1 is provided in an antenna path. When the waveguide antenna 1 is used in a wireless communication system in the vertical direction of a high-rise building, it is referred to as a waveguide 1 in this specification. In Fig. 6, carry out the monitoring of wireless mesh network 36 and environment sensor 30 etc. based on B floor 27 in continuous A floor 26, B floor 27, C floor 28 of high-rise building, and the result of monitoring is delivered to monitoring center etc.

A wireless access point 16 connected to a 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 . In addition, the waveguide 1 may be directly connected to the wireless access point 16 . In the B floor 27 , the radio wave leaked from the waveguide 1 is transmitted to the wireless access point 16 of the B floor 27 , and is sent to the wireless mesh network 36 of the wireless terminal 35 of the B floor 27 .

On the other hand, in the B floor 27 , an environmental sensor 30 including an environmental sensor main body 31 and, for example, a temperature sensor box 32 , a combustible gas sensor box 33 , and a virus detection box 34 communicates wirelessly with the waveguide 1 . Environmental measuring devices such as the temperature sensor box 32 monitor the working environment at the construction site, and transmit the results of the monitoring to the monitoring center and the like. In addition, the construction status and the like can be grasped by monitoring cameras 29 and the like installed at the construction site. In addition, 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 radio wave measurement on the second floor of a high-rise building in which no waveguide 1 is installed. In addition, FIG. 8 shows the evaluation results of the radio wave measurement on the 9th floor of a high-rise building in which the waveguide 1 is not installed. In addition, FIG. 9 shows the evaluation results of radio wave measurement on the second floor of a high-rise building in which the waveguide 1 is installed. In addition, FIG. 10 shows the evaluation results of radio wave measurement on the ninth floor of a high-rise building in which the waveguide 1 is installed. This evaluation was performed on the 2nd and 9th floors of a 9-story high-rise building. Fig. 7 and Fig. 8 are the situation that the waveguide 1 is not set in the antenna path such as the elevator shaft or the stairwell, Fig. 9 and Fig. 10 are the situation that the waveguide 1 is set in the antenna path such as the elevator shaft or the stairwell, according to whether the waveguide is set 1. Use RSSI (dB) to measure the received power level or the intensity of radio waves in the corridor, and display the evaluation in six levels (above 30dB, 25-29dB, 20-24dB, 15-19dB, 10-14dB, and below 9dB) result.

In the measurement on the second floor where the reception level is high, when the waveguide 1 is not installed as shown in FIG. 7 , the maximum value is 20 to 24 dB in the corridor around the stairwell, but it is 10 to 14 dB in the room enclosed by the wall. On the other hand, in the case where the waveguide 1 is installed in Fig. 9, the maximum value is 30 dB or more in the corridor around the stairwell, and it is 25 to 29 dB even in the room enclosed by the wall. Effect.

In the nine floors 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, in the case of installing the waveguide 1 in FIG. 10 , the maximum level 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 is used, since the drop in the received power level in high-rise buildings is hardly found, it is proved that the waveguide 1 has stable characteristics in the height direction.

The structure, shape, size, and arrangement relationship of the waveguide antenna 1 or waveguide 1 described in the above 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 various changes can be made without departing from the scope of the technical idea shown in the claims.

Explanation of reference signs

1 waveguide antenna or waveguide, 2 radio wave leakage part, 3 radio wave non-leakage part, 4 connection part, 5a, 5b clamp, 6 input connector, 7 slot, 8a, 8b flange joint, 9 single pipe, 10 size Adjusting ring, 14 Corrugated part, 16 Wireless access point, 17 Coaxial cable, 18 Connector part, 22 Clamp fixing bolt, 23 Clamp fixing bolt hole, 24 Connection bolt, 25 Connection bolt hole, 26A layer, 27B layer, 28C Layer, 29 surveillance cameras, 30 environmental sensors, 31 main body of environmental sensors, 32 temperature sensor boxes, 33 combustible gas sensor boxes, 34 virus detection boxes, 35 wireless terminals, 36 wireless mesh network.

Claims (12)

1. A waveguide antenna-based communication system is characterized by comprising a radio wave leakage section, a radio wave non-leakage section, a clamp, and a connection section,

the radio wave leakage part transmits radio waves inside and leaks the radio waves,

the radio wave non-leakage part is connected with the input connector in a length-adjustable way through a single pipe pipeline, and prevents the radio wave from leakage,

the input connector is connected to a wireless access point, and performs wireless communication between a wireless device and a wireless terminal device by the leaked radio wave among the radio waves transmitted from the wireless access point,

the clamp is secured to the single tube conduit near the end thereof by clamping the single tube conduit,

the clamp has a connecting bolt hole into which a connecting bolt is inserted,

the connection having a first end secured to the clamp and a second end, the first end having a fitting that engages and covers around the tip portion of the single tube conduit,

the joint has a connecting bolt hole into which a connecting bolt is inserted, the connecting portion is fixed to the jig by a connecting bolt inserted into the connecting bolt hole of the joint and the jig,

the second end is fixed on the electric wave leakage part, the second end is provided with a flange joint, the flange joint is fixed on the electric wave leakage part,

the connecting part is provided with any one of a corrugated part and a bending tube which can be freely corresponding to any one of a curve and a broken line,

the radio wave leakage portion is provided with two slots which are provided at angles having mutually opposite directions with respect to a main axis of the radio wave leakage portion.

2. The waveguide antenna-based communication system according to claim 1, wherein the radio wave leaking portion and the radio wave non-leaking portion are alternately arranged to form one unit, and a waveguide antenna of an arbitrary length is formed by connecting a plurality of units.

3. The waveguide antenna-based communication system according to claim 1 or 2, wherein in the flange joint of the connection portion, length adjustment is performed by preparing a ring for size adjustment having different plate thicknesses and using any one of them.

4. The waveguide antenna-based communication system according to claim 1 or 2, wherein the radio wave leakage portion is made of aluminum, stainless steel, or copper, and the radio wave non-leakage portion is galvanized.

5. The waveguide antenna-based communication system according to claim 1 or 2, wherein the radio wave leakage portion is provided as an antenna path extending in a longitudinal system as a temporary arrangement in a multi-story building, the radio wave is leaked by at least one of the radio wave leakage portions in a layer transmitting the radio wave, and the radio wave non-leakage portion having no slot hole is used in a layer not transmitting the radio wave.

6. The waveguide antenna-based communication system according to claim 1, wherein the leaked radio waves are transmitted to the wireless access points provided in the respective layers, and the radio waves are transmitted from the wireless access points to the respective wireless terminals through wireless mesh networks provided in the respective layers.

7. The waveguide antenna based communication system of claim 1, wherein the radio wave non-leaky section is secured to a temporary setting funding within the antenna path or to an iron section of the deck plate by clamping means.

8. A waveguide antenna based communication system according to claim 1 or 2, 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 electric waves.

9. The waveguide antenna-based communication system according to claim 1 or 2, wherein at least one of the radio wave leakage sections is disposed in an antenna path extending in a planar direction from a wireless access point, and the radio wave is transmitted in the planar direction.

10. The waveguide antenna-based communication system according to claim 1 or 2, wherein the waveguide antennas each configured by a plurality of systems are disposed in each antenna path in a longitudinal direction or a planar direction, and each waveguide antenna is a communication system for transmitting respective information to each wireless terminal in a high-rise building.

11. A waveguide antenna based communication system according to claim 1 or 2, wherein each waveguide antenna has a dedicated wireless access point.

12. A waveguide antenna based communication system according to claim 1 or 2, wherein each waveguide antenna is connected to a dedicated environmental sensor provided in the multi-story building, respectively, for transmitting the acquired environmental data to a data center.

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