技术领域Technical field
本申请涉及隧道通信技术领域，尤其涉及一种降低隧道通信干扰的系统及方法。The present application relates to the field of tunnel communication technology, and in particular, to a system and method for reducing tunnel communication interference.
背景技术Background technique
随着国家发展需要，提高人们的交通便利，在一些偏远山区，开挖隧道是一种必然选择，并且由于网络的发展，隧道内的通信技术也在不断的发展提高，使人们在隧道内也能与外界进行顺畅的通信。With the needs of national development and improving people's transportation convenience, tunnel excavation is an inevitable choice in some remote mountainous areas. And due to the development of the network, communication technology in tunnels is also constantly developing and improving, allowing people to travel in tunnels. Able to communicate smoothly with the outside world.
但是目前隧道通信受限于其特殊的环境条件，隧道内通信经常会受到各种干扰，如磁场干扰、无线局域网(WLAN)干扰、天线的分布对无线通信系统信号的干扰等。However, tunnel communication is currently limited by its special environmental conditions. Communication in tunnels is often subject to various interferences, such as magnetic field interference, wireless local area network (WLAN) interference, and antenna distribution interference on wireless communication system signals.
因此，本申请从多方面设计了一种降低隧道通信干扰的系统及方法。Therefore, this application designs a system and method for reducing tunnel communication interference from many aspects.
发明内容Contents of the invention
本申请实施例的目的在于提供一种降低隧道通信干扰的系统及方法，以解决隧道通信干扰的技术问题。具体技术方案如下：The purpose of the embodiments of the present application is to provide a system and method for reducing tunnel communication interference, so as to solve the technical problem of tunnel communication interference. The specific technical solutions are as follows:
第一方面，提供了一种降低隧道通信干扰的系统，所述系统包括：In a first aspect, a system for reducing tunnel communication interference is provided. The system includes:
双工器、接收天线、第一定向耦合器、第二定向耦合器、基站、信号分配器、信号合路器、近端机、第一OFDM调频器、第二OFDM调频器、第一OFDM解调器、第二OFDM解调器、多个远端机、多个发送天线、主控机和电源，其中，Duplexer, receiving antenna, first directional coupler, second directional coupler, base station, signal distributor, signal combiner, near-end unit, first OFDM frequency modulator, second OFDM frequency modulator, first OFDM Demodulator, second OFDM demodulator, multiple remote units, multiple transmitting antennas, main control unit and power supply, among which,
所述基站与所述双工器双向通信连接，所述双工器与所述接收天线连接，在所述基站与双工器下行通道上还串联有第一定向耦合器，在所述基站与所述双工器下行通道上还串联有第二定向耦合器，所述第一定向耦合器与所述信号分配器连接，所述信号分配器通过下行通信线与所述近端机的信号接收端口连接，所述第二定向耦合器与所述信号合路器连接，所述信号分配器通过上行通信线与所述近端机的信号发送端口连接，所述近端机通过光纤连接所述第一OFDM调频器和第二OFDM解调器，所述第一OFDM调频器与所述第一OFDM解调器连接，第二OFDM调频器与所述第二OFDM解调器，所述第一OFDM解调器和第二OFDM调频器与多个均匀间隔设置在隧道内的远端机连接，每个所述远端机连接有一个板状的发送天线，所述主控机分别与所述双工器、第一定向耦合器、第二定向耦合器、信号分配器、信号合路器、近端机、第一OFDM调频器、第一OFDM解调器、第二OFDM调频器、第二OFDM解调器、多个远端机通过控制线连接，所述电源通过电源线分别与所述双工器、第一定向耦合器、第二定向耦合器、信号分配器、信号合路器、近端机、第一OFDM调频器、第一OFDM解调器、第二OFDM调频器、第二OFDM解调器、多个远端机通过控制线连接。The base station is connected to the duplexer for bidirectional communication, the duplexer is connected to the receiving antenna, and a first directional coupler is connected in series on the downlink channel of the base station and the duplexer. A second directional coupler is also connected in series with the downlink channel of the duplexer. The first directional coupler is connected to the signal distributor. The signal distributor is connected to the near-end machine through a downlink communication line. The signal receiving port is connected, the second directional coupler is connected to the signal combiner, the signal distributor is connected to the signal sending port of the near-end machine through an uplink communication line, and the near-end machine is connected through an optical fiber. The first OFDM frequency modulator and the second OFDM demodulator, the first OFDM frequency modulator is connected to the first OFDM demodulator, the second OFDM frequency modulator is connected to the second OFDM demodulator, and the The first OFDM demodulator and the second OFDM frequency modulator are connected to a plurality of remote machines evenly spaced in the tunnel. Each of the remote machines is connected to a plate-shaped transmitting antenna, and the main control machine is connected to The duplexer, the first directional coupler, the second directional coupler, the signal distributor, the signal combiner, the near-end machine, the first OFDM frequency modulator, the first OFDM demodulator, and the second OFDM frequency modulator , the second OFDM demodulator, and multiple remote machines are connected through control lines. The power supply is respectively connected to the duplexer, the first directional coupler, the second directional coupler, the signal distributor, and the signal through the power line. The combiner, the near-end machine, the first OFDM frequency modulator, the first OFDM demodulator, the second OFDM frequency modulator, the second OFDM demodulator, and multiple remote machines are connected through control lines.
可选地，所述系统还包括：隔离电流环，所述隔离电流环安装在每个设备的通信端口处。Optionally, the system further includes: an isolation current ring installed at the communication port of each device.
可选地，所述系统还包括：多个干扰源检测设备，所述干扰源检测设备均匀间隔安装在隧道内壁上，所述多个干扰源检测设备与所述主控机连接。Optionally, the system further includes: multiple interference source detection devices, the interference source detection devices are installed at even intervals on the inner wall of the tunnel, and the multiple interference source detection devices are connected to the main control machine.
可选地，所述接收天线和发送天线均采用定向天线。Optionally, both the receiving antenna and the transmitting antenna adopt directional antennas.
可选地，所述控制线、通信线和电源线之间设置有隔离板。Optionally, isolation boards are provided between the control lines, communication lines and power lines.
第二方面，本申请提供一种降低隧道通信干扰的方法，所述方法包括：In a second aspect, this application provides a method for reducing tunnel communication interference. The method includes:
将基站信号通过第一定向耦合器发送给信号分配器；Send the base station signal to the signal distributor through the first directional coupler;
信号分配器将基站信号分配给多个近端机；The signal distributor distributes the base station signal to multiple near-end units;
每个近端机通过光纤将基站信号发送给第一OFDM调频器；Each near-end machine sends the base station signal to the first OFDM frequency modulator through optical fiber;
第一OFDM调频器将基站信号转换成多路低速载波信号进行传输，传输至隧道内的多个远端机处，并经过第一OFDM解调器合成一路高速信号后发送给远端机；The first OFDM frequency modulator converts the base station signal into multiple low-speed carrier signals for transmission, and transmits them to multiple remote machines in the tunnel. The first OFDM demodulator synthesizes a high-speed signal and sends it to the remote machine;
远端机将信号发送给对应的目标接收设备。The remote machine sends the signal to the corresponding target receiving device.
可选地，所述方法还包括：Optionally, the method also includes:
将隧道内设备的信号通过远端机发送给第二OFDM调频器；Send the signal of the equipment in the tunnel to the second OFDM frequency modulator through the remote machine;
第二OFDM调频器将信号转换成多路低速载波信号后传输给隧道口处的第二OFDM解调器；The second OFDM frequency modulator converts the signal into multiple low-speed carrier signals and then transmits them to the second OFDM demodulator at the tunnel entrance;
第二OFDM解调器将信号合成一路高速信号后经近端机发送给信号合路器；The second OFDM demodulator synthesizes the signal into a high-speed signal and sends it to the signal combiner through the near-end machine;
信号合路器经过第二定向耦合器将隧道内的信号发送给基站。The signal combiner sends the signal in the tunnel to the base station through the second directional coupler.
可选地，所述方法还包括：Optionally, the method also includes:
通过干扰源检测设备检测干扰信号；Detect interference signals through interference source detection equipment;
将干扰信号发送给主控机，由主控机判断干扰信号的来源；Send the interference signal to the main control computer, and the main control computer determines the source of the interference signal;
若来源来自WLAN信号，则将干扰信号调整至空闲信道。If the source comes from a WLAN signal, adjust the interference signal to an idle channel.
可选地，所述方法还包括：Optionally, the method also includes:
在每个设备的通信端口处加装隔离电流环。Install an isolation current loop at the communication port of each device.
本申请实施例有益效果：Beneficial effects of the embodiments of this application:
本申请实施例提供了一种降低隧道通信干扰的系统及方法，本申请通过设置双工器和第一定向耦合器、第二定向耦合器能够将接收信号和发射信号进行有效隔离，防止相互干扰；通过第一OFDM调频器、第一OFDM解调器、第二OFDM调频器和第二OFDM解调器能够既保证信号的高速传输，又降低多径衰落的干扰；并且还将接收天线和发送天线设置为定向天线，增加信号强度，进而增加信号抗干扰能力。The embodiments of this application provide a system and method for reducing tunnel communication interference. This application can effectively isolate the receiving signal and the transmitting signal by arranging a duplexer and a first directional coupler and a second directional coupler to prevent each other. interference; the first OFDM frequency modulator, the first OFDM demodulator, the second OFDM frequency modulator and the second OFDM demodulator can not only ensure high-speed transmission of signals, but also reduce the interference of multipath fading; and the receiving antenna and The transmitting antenna is set as a directional antenna to increase signal strength and thereby increase signal anti-interference capability.
当然，实施本申请的任一产品或方法并不一定需要同时达到以上所述的所有优点。Of course, implementing any product or method of the present application does not necessarily require achieving all the above-mentioned advantages simultaneously.
附图说明Description of drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to describe the embodiments or the prior art. Obviously, for those of ordinary skill in the art, It is said that other drawings can be obtained based on these drawings without exerting creative labor.
图1为本申请实施例提供的一种降低隧道通信干扰的系统的结构示意图。Figure 1 is a schematic structural diagram of a system for reducing tunnel communication interference provided by an embodiment of the present application.
其中，101、基站；102、第一定向耦合器；103、第二定向耦合器；104、双工器；105、接收天线；106、信号分配器；107、信号合路器；108、近端机；109、第一OFDM调频器；110、第二OFDM调频器；111、第一OFDM解调器；112、第二OFDM解调器；113、远端机；114、发送天线。Among them, 101. Base station; 102. First directional coupler; 103. Second directional coupler; 104. Duplexer; 105. Receiving antenna; 106. Signal distributor; 107. Signal combiner; 108. Near Terminal unit; 109. First OFDM frequency modulator; 110. Second OFDM frequency modulator; 111. First OFDM demodulator; 112. Second OFDM demodulator; 113. Remote unit; 114. Transmitting antenna.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
本申请实施例提供了一种降低隧道通信干扰的系统，下面将结合具体实施方式，对本申请实施例提供的一种降低隧道通信干扰的系统进行详细的说明，如图1所示，该系统包括：双工器104、接收天线105、第一定向耦合器102、第二定向耦合器103、基站101、信号分配器106、信号合路器107、近端机108、第一OFDM调频器109、第二OFDM调频器110、第一OFDM解调器111、第二OFDM解调器112、多个远端机113、多个发送天线114、主控机和电源，其中，The embodiment of the present application provides a system for reducing tunnel communication interference. The system for reducing tunnel communication interference provided by the embodiment of the present application will be described in detail below in conjunction with the specific implementation. As shown in Figure 1, the system includes : Duplexer 104, receiving antenna 105, first directional coupler 102, second directional coupler 103, base station 101, signal distributor 106, signal combiner 107, near-end unit 108, first OFDM frequency modulator 109 , the second OFDM frequency modulator 110, the first OFDM demodulator 111, the second OFDM demodulator 112, a plurality of remote units 113, a plurality of transmitting antennas 114, a main control unit and a power supply, wherein,
所述基站101与所述双工器104双向通信连接，所述双工器104与所述接收天线105连接，在所述基站101与双工器104下行通道上还串联有第一定向耦合器102，在所述基站101与所述双工器104下行通道上还串联有第二定向耦合器103，所述第一定向耦合器102与所述信号分配器106连接，所述信号分配器106通过下行通信线与所述近端机108的信号接收端口连接，所述第二定向耦合器103与所述信号合路器107连接，所述信号分配器106通过上行通信线与所述近端机108的信号发送端口连接，所述近端机108通过光纤连接所述第一OFDM调频器109和第二OFDM解调器112，所述第一OFDM调频器109与所述第一OFDM解调器111连接，第二OFDM调频器110与所述第二OFDM解调器112，所述第一OFDM解调器111和第二OFDM调频器110与多个均匀间隔设置在隧道内的远端机113连接，每个所述远端机113连接有一个板状的发送天线114，所述主控机分别与所述双工器104、第一定向耦合器102、第二定向耦合器103、信号分配器106、信号合路器107、近端机108、第一OFDM调频器109、第一OFDM解调器111、第二OFDM调频器110、第二OFDM解调器112、多个远端机113通过控制线连接，所述电源通过电源线分别与所述双工器104、第一定向耦合器102、第二定向耦合器103、信号分配器106、信号合路器107、近端机108、第一OFDM调频器109、第一OFDM解调器111、第二OFDM调频器110、第二OFDM解调器112、多个远端机113通过控制线连接。The base station 101 is connected to the duplexer 104 for bidirectional communication. The duplexer 104 is connected to the receiving antenna 105. A first directional coupling is also connected in series on the downlink channel of the base station 101 and the duplexer 104. The second directional coupler 103 is also connected in series on the downlink channel of the base station 101 and the duplexer 104. The first directional coupler 102 is connected to the signal distributor 106. The signal distributor The second directional coupler 103 is connected to the signal combiner 107 and the signal distributor 106 is connected to the signal receiving port of the near-end machine 108 through a downlink communication line. The signal transmission port of the near-end machine 108 is connected. The near-end machine 108 is connected to the first OFDM frequency modulator 109 and the second OFDM demodulator 112 through optical fiber. The first OFDM frequency modulator 109 and the first OFDM The demodulator 111 is connected to the second OFDM modulator 110 and the second OFDM demodulator 112. The first OFDM demodulator 111 and the second OFDM modulator 110 are connected to a plurality of remote devices evenly spaced in the tunnel. The terminal machine 113 is connected, and each remote machine 113 is connected to a plate-shaped transmitting antenna 114. The main control machine is connected to the duplexer 104, the first directional coupler 102, and the second directional coupler respectively. 103. Signal distributor 106, signal combiner 107, near-end unit 108, first OFDM frequency modulator 109, first OFDM demodulator 111, second OFDM frequency modulator 110, second OFDM demodulator 112, multiple The remote machine 113 is connected through a control line, and the power supply is connected to the duplexer 104, the first directional coupler 102, the second directional coupler 103, the signal distributor 106, the signal combiner 107, and The local unit 108, the first OFDM frequency modulator 109, the first OFDM demodulator 111, the second OFDM frequency modulator 110, the second OFDM demodulator 112, and multiple remote units 113 are connected through control lines.
可选地，所述系统还包括：隔离电流环，所述隔离电流环安装在每个设备的通信端口处。Optionally, the system further includes: an isolation current ring installed at the communication port of each device.
可选地，所述系统还包括：多个干扰源检测设备，所述干扰源检测设备均匀间隔安装在隧道内壁上，所述多个干扰源检测设备与所述主控机连接。在一个示例中，干扰源检测设备可以采用频谱仪。Optionally, the system further includes: multiple interference source detection devices, the interference source detection devices are installed at even intervals on the inner wall of the tunnel, and the multiple interference source detection devices are connected to the main control machine. In one example, the interference source detection device may use a spectrum analyzer.
可选地，所述接收天线105和发送天线114均采用定向天线。Optionally, both the receiving antenna 105 and the transmitting antenna 114 adopt directional antennas.
可选地，所述控制线、通信线和电源线之间设置有隔离板。Optionally, isolation boards are provided between the control lines, communication lines and power lines.
第二方面，基于同样的发明构思，本申请提供一种降低隧道通信干扰的方法，所述方法包括：In a second aspect, based on the same inventive concept, this application provides a method for reducing tunnel communication interference. The method includes:
将基站101信号通过第一定向耦合器102发送给信号分配器106；Send the base station 101 signal to the signal distributor 106 through the first directional coupler 102;
信号分配器106将基站101信号分配给多个近端机108；The signal distributor 106 distributes the base station 101 signals to multiple near-end units 108;
每个近端机108通过光纤将基站101信号发送给第一OFDM调频器109；Each near-end unit 108 sends the base station 101 signal to the first OFDM frequency modulator 109 through optical fiber;
第一OFDM调频器109将基站101信号转换成多路低速载波信号进行传输，传输至隧道内的多个远端机113处，并经过第一OFDM解调器111合成一路高速信号后发送给远端机113；The first OFDM frequency modulator 109 converts the base station 101 signal into multiple low-speed carrier signals for transmission, and transmits them to multiple remote terminals 113 in the tunnel. The first OFDM demodulator 111 synthesizes a high-speed signal and sends it to the remote terminal. Terminal 113;
在本申请实施例中，通过第一OFDM调频器109将基站101信号转换成多路低速载波信号进行传输，能够降低信号的带宽，如果信号带宽小于相干带宽，那么就可以认为信号的传输过程是没有频率选择性衰落的，也就是能有效抵抗多径衰落。同时为了高速传输数据，经过第一OFDM解调器111合成一路高速信号后发送给远端机113。In the embodiment of the present application, the base station 101 signal is converted into multiple low-speed carrier signals for transmission through the first OFDM frequency modulator 109, which can reduce the bandwidth of the signal. If the signal bandwidth is smaller than the coherence bandwidth, then the signal transmission process can be considered as There is no frequency selective fading, that is, it can effectively resist multipath fading. At the same time, in order to transmit data at high speed, a high-speed signal is synthesized through the first OFDM demodulator 111 and then sent to the remote machine 113.
远端机113将信号发送给对应的目标接收设备。The remote machine 113 sends the signal to the corresponding target receiving device.
可选地，所述方法还包括：Optionally, the method also includes:
将隧道内设备的信号通过远端机113发送给第二OFDM调频器110；Send the signal of the equipment in the tunnel to the second OFDM frequency modulator 110 through the remote machine 113;
第二OFDM调频器110将信号转换成多路低速载波信号后传输给隧道口处的第二OFDM解调器112；The second OFDM frequency modulator 110 converts the signal into multiple low-speed carrier signals and then transmits them to the second OFDM demodulator 112 at the tunnel entrance;
第二OFDM解调器112将信号合成一路高速信号后经近端机108发送给信号合路器107；The second OFDM demodulator 112 synthesizes the signal into a high-speed signal and then sends it to the signal combiner 107 through the near-end unit 108;
信号合路器107经过第二定向耦合器103将隧道内的信号发送给基站101。The signal combiner 107 sends the signal in the tunnel to the base station 101 through the second directional coupler 103 .
可选地，所述方法还包括：Optionally, the method also includes:
通过干扰源检测设备检测干扰信号；Detect interference signals through interference source detection equipment;
将干扰信号发送给主控机，由主控机判断干扰信号的来源；Send the interference signal to the main control computer, and the main control computer determines the source of the interference signal;
若来源来自WLAN信号，则将干扰信号调整至空闲信道。If the source comes from a WLAN signal, adjust the interference signal to an idle channel.
在本申请示例中，WLAN信号可能来自于隧道内车辆中人们携带的手机、平板等无线通信设备。In the example of this application, the WLAN signal may come from wireless communication devices such as mobile phones and tablets carried by people in vehicles in the tunnel.
可选地，所述方法还包括：Optionally, the method also includes:
在每个设备的通信端口处加装隔离电流环。Install an isolation current loop at the communication port of each device.
需要说明的是，在本文中，诸如“第一”和“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should be noted that in this article, relational terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.
以上所述仅是本申请的具体实施方式，使本领域技术人员能够理解或实现本申请。对这些实施例的多种修改对本领域的技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所申请的原理和新颖特点相一致的最宽的范围。The above descriptions are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111072926.8ACN113794665B (en) | 2021-09-14 | 2021-09-14 | System and method for reducing tunnel communication interference |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111072926.8ACN113794665B (en) | 2021-09-14 | 2021-09-14 | System and method for reducing tunnel communication interference |
| Publication Number | Publication Date |
|---|---|
| CN113794665A CN113794665A (en) | 2021-12-14 |
| CN113794665Btrue CN113794665B (en) | 2024-01-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111072926.8AActiveCN113794665B (en) | 2021-09-14 | 2021-09-14 | System and method for reducing tunnel communication interference |
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| CN (1) | CN113794665B (en) |
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| CN112333739A (en)* | 2014-06-05 | 2021-02-05 | 奥卡多创新有限公司 | Communication system and method |
| CN104092498A (en)* | 2014-06-23 | 2014-10-08 | 广东科学技术职业学院 | Co-site mixed signal long-distance optical fiber radio frequency coverage system and method |
| CN109257098A (en)* | 2018-09-13 | 2019-01-22 | 郑州三友软件科技有限公司 | A kind of more scene communication full-service light distribution system control methods |
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| CN113794665A (en) | 2021-12-14 |
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| CB03 | Change of inventor or designer information | Inventor after:Guan Desheng Inventor after:Lu Zhifeng Inventor after:Xu Peng Inventor after:Zhang Jian Inventor after:Zheng Qiang Inventor before:Lu Zhifeng Inventor before:Xu Peng Inventor before:Zhang Jian Inventor before:Zheng Qiang | |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | Denomination of invention:A system and method for reducing tunnel communication interference Granted publication date:20240105 Pledgee:Development Zone sub branch of Bank of Guangzhou Co.,Ltd. Pledgor:GUANGZHOU BENYI INFORMATION TECHNOLOGY Co.,Ltd. Registration number:Y2024980058814 |