Water body profile ambient light field free fall measurement system

Abstract

The invention discloses a water body profile ambient light field free falling body measurement system. A system main body sequentially comprises a floating body shell, a main floating body embedded into the floating body shell and a base frame from top to bottom; the base frame is hollow and located below the main floating body, a plurality of balance weight adjusting blocks are arranged below the base frame, and force bearing connectors and steel wire synchronous belts are symmetrically arranged on the side edges of the base frame; the steel wire synchronous belt is fixed to the outer side of the base frame and used for fixing a sensor, and the force bearing connector is located on the inner side of the base frame and used for being connected with an armored cable; and the armored cable is connected with the sensor to provide communication and power transmission. The system can be used in oceans or lakes, the measured data is a real water environment light field, the device drifts outwards away from a ship under the action of water flow to reach a certain distance (20-30 m), and the influence of a ship body on the water optical environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of ocean observation, and in particular relates to a free-fall measurement system for an ambient light field of a water body profile. Background technique [0002] When sunlight enters a water body (ocean or lake), it interacts with water molecules and particles in the water, producing a unique ambient light field. Marine environmental light field profile measurement is a routine measurement item in ocean optical surveys, which can be applied to the inversion of the concentration of phytoplankton, non-pigmented particles and soluble organic matter in water and the authenticity test of satellite water color remote sensing products. In addition, the underwater light field distribution also plays an important role in the study of underwater vision, underwater imaging and laser communication. [0003] The measurement of the ambient light field of the underwater profile can generally be achieved in the following...

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Problems solved by technology

[0003] The measurement of the ambient light field of the underwater profile can generally be achieved in the following three ways: (1) through an optical sensor and a ship-borne winch, that is, the optical sensor is integrated in an optical cage, and then the optical cage is released and recovered by the winch to measure the underwater profile Ambient light field; this method is easy to implement, but the disadvantage is that the measured ambient light field in water is greatly affected by the hull because the winch is fixed on the hull

(2) Measure seawater optical radiation at a fixed depth by fixing the optical sensor on the buoy, such as the published patent application numbers "CN 110116787A" and "CN 110470386A"; the advantage of this method is that it can work for a long time, and the disadvantage is that it can only measure The light field of the water body environment at a fixed depth, and the optical buoy is large in size and weight, and cannot be used portablely for large-scale sea area surveys

(3) By fixing the optical sensor on the platform with power devices such as electricity and hydraulic pressure, buoyancy control is realized to realize profile measurement, such as the authorized patent "CN 108917727 B" and the published patent application "CN110715652 A"; the advantages of this method It is easy to control the attitude of the platform, but it needs power devices such as hydraulic pressure and electric power, and the overall design is more complicated

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