Device for stratified in-situ monitoring of water quality and dissolved oxygen of sediments in tidal river network region

A device for stratified in-situ monitoring of the water quality and dissolved oxygen of sediments in a tidal river network region, comprising a floating platform, wherein:

• three take-up and pay-off assemblies are fixedly connected to an edge of a top surface of the floating platform, each said take-up and pay-off assembly comprises a sheave wheel, a first cable, a base plate, two oblique rods and a first gear motor, a water quality monitoring assembly, a sediment monitoring assembly and a first balancing weight are fixedly connected to bottom ends of the three first cables on the three take-up and pay-off assemblies respectively, and a central control unit is fixedly connected to the top surface of the floating platform;
• the water quality monitoring assembly comprises a shell, a pressure sensor and a dissolved oxygen meter are fixedly connected to one side of the shell, two water quality samplers are fixedly connected to two sides of the shell respectively, top ends of the water quality samplers are open, two cover plates are rotatably connected to the two sides of the shell and are located above the two water quality samplers respectively, and a center of a top end of the shell is fixedly connected to a bottom end of the corresponding first cable;
• the sediment monitoring assembly comprises a circular counterweight shell, a vertical opening is vertically formed in the circular counterweight shell, two horizontal support rods are fixedly connected to an inner wall of the vertical opening, a main plate is fixedly connected between the two horizontal support rods, a camera and a lamp are fixedly connected to one side of the main plate, a sliding groove is formed in a side, away from the camera, of the main plate, a sliding block is vertically and slidably connected into the sliding groove, a movable plate is fixedly connected to a side, located outside the sliding groove, of the sliding block, and a dissolved oxygen probe is fixedly connected to a bottom end of the movable plate.