Emergency communication device for positioning personnel in electric power tunnel

• Main Authors: MU RUIJIA, ZHANG MINGGUANG, LI CHANGZHONG, JIANG ZHILI, YANG ZHENWEI
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2014
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COLORIMETRY; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; RADIATION PYROMETRY; RADIO DIRECTION-FINDING; RADIO NAVIGATION; REGULATING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING