Abstract: The present invention discloses a differential COTDR distributed acoustic sensing device based on heterogeneous double-sideband chirped-pulses of the invention, comprising a light source (1), a 1×2 polarization-maintaining optical-fiber coupler (2), a dual Mach-Zehnder electro-optical modulator (3), an arbitrary waveform generator (4), a first low noise microwave amplifier (5), a second low noise microwave amplifier (6), an electro-optical modulator bias control panel (7), a 1×2 optical-fiber coupler (8), an erbium-doped optical-fiber amplifier (9), an optical-fiber filter (10), an optical-fiber circulator (11), a sensing optical fiber (12), a tricyclic polarization controller (13), a 2×2 optical-fiber coupler (14), a balanced photoelectric detector (15), a data acquisition card (16) and a processing unit (17).

Abstract: A passenger state analysis method and apparatus, a vehicle, an electronic device and a storage medium. The method includes: obtaining a video stream of a rear seat area in a vehicle; performing face and/or body detection on at least one image frame in the video stream; determining state information of a passenger in the rear seat area according to a face and/or body detection result; and in response to the fact that the state information of the passenger satisfies a predetermined condition, outputting prompt information to a driver area or a specified device in the vehicle.

Abstract: A method for intelligent adjustment of a driving environment includes: extracting a face feature of a driver's image captured by a vehicle-mounted camera; authenticating the extracted face feature based on at least one pre-stored registered face feature; in response to successful face feature authentication, determining driving environment personalization information corresponding to the registered face feature corresponding to the face feature; and sending the driving environment personalization information to a vehicle provided with the vehicle-mounted camera, or controlling the vehicle to adjust the driving environment according to the driving environment personalization information.

Abstract: A method and an apparatus for intelligent adjustment of a vehicle seat, and a medium are provided. The method includes: detecting an image of a riding person, to obtain a detection result; determining body type related information and/or face height information of the riding person according to the detection result; determining adjustment information of a seat of the riding person based on the body type related information and/or the face height information; and outputting the adjustment information, or adjusting the seat based on the adjustment information.

Abstract: A passenger state analysis method and apparatus, a vehicle, an electronic device and a storage medium. The method includes: obtaining a video stream of a rear seat area in a vehicle; performing face and/or body detection on at least one image frame in the video stream; determining state information of a passenger in the rear seat area according to a face and/or body detection result; and in response to the fact that the state information of the passenger satisfies a predetermined condition, outputting prompt information to a driver area or a specified device in the vehicle.