{"title":"蜿蜒隧道和地下深层街道的安全通信","authors":"K. Matsui, J. Chiba","doi":"10.1109/CCST.1994.363766","DOIUrl":null,"url":null,"abstract":"In underground environments, communicability is vital in emergency cases such as fires, as well as in routine management operations. In a disaster the lines of the wire communication system may be damaged. Therefore, a simple wireless device is necessary for the preservation of public safety. This study aims at establishing a basis for solving such problems. In this paper, we have analyzed the propagation characteristics of the Crank-Tunnel. To solve such a boundary value problem, we have introduced the boundary-element method and the surface impedance approximation. In addition, reflector placed at the corner improves the radio communication characteristics in crooked tunnels.<<ETX>>","PeriodicalId":314758,"journal":{"name":"1994 Proceedings of IEEE International Carnahan Conference on Security Technology","volume":"222 3 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1994-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Security communication in winding tunnels and deep underground streets\",\"authors\":\"K. Matsui, J. Chiba\",\"doi\":\"10.1109/CCST.1994.363766\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In underground environments, communicability is vital in emergency cases such as fires, as well as in routine management operations. In a disaster the lines of the wire communication system may be damaged. Therefore, a simple wireless device is necessary for the preservation of public safety. This study aims at establishing a basis for solving such problems. In this paper, we have analyzed the propagation characteristics of the Crank-Tunnel. To solve such a boundary value problem, we have introduced the boundary-element method and the surface impedance approximation. In addition, reflector placed at the corner improves the radio communication characteristics in crooked tunnels.<<ETX>>\",\"PeriodicalId\":314758,\"journal\":{\"name\":\"1994 Proceedings of IEEE International Carnahan Conference on Security Technology\",\"volume\":\"222 3 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-10-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1994 Proceedings of IEEE International Carnahan Conference on Security Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/CCST.1994.363766\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1994 Proceedings of IEEE International Carnahan Conference on Security Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CCST.1994.363766","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Security communication in winding tunnels and deep underground streets
In underground environments, communicability is vital in emergency cases such as fires, as well as in routine management operations. In a disaster the lines of the wire communication system may be damaged. Therefore, a simple wireless device is necessary for the preservation of public safety. This study aims at establishing a basis for solving such problems. In this paper, we have analyzed the propagation characteristics of the Crank-Tunnel. To solve such a boundary value problem, we have introduced the boundary-element method and the surface impedance approximation. In addition, reflector placed at the corner improves the radio communication characteristics in crooked tunnels.<>
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