High-precision social distance sensing system based on mutual distance measurement of sound signals of multi-user smart phones

• Main Authors: XUE CAN, CAI SHENGSHENG, XU DONGYANG, LUO FURONG, WANG ZHI
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TELEPHONIC COMMUNICATION; TESTING

The invention provides a high-precision social distance sensing system based on multi-user smart phone sound signal mutual distance measurement, which is composed of a plurality of smart phone user subsystems, and each smart phone user subsystem comprises a sound signal transmitting module, a sound signal receiving module, a sound signal receiving module and a sound signal sending module, an acoustic signal receiving module; the data processing module is used for carrying out robust identification on the sound signals so as to confirm the ID of the sound signals, receiving and processing the sound signals by utilizing carrier perception multiple access, frequency division multiple access and ChirpBOK methods and adopting a rollback mechanism, determining the distance between the smartphone subsystems to which any two sound signals received by the current smartphone user subsystem belong, and sending the distance to the smartphone user subsystem. And then the actual time when each sound signal is received is d