Abstract: A dropsonde with a dandelion-like structure includes a support system, a rotor wing system, a rotor wing restraint system, a sensing main control system and an electrical damping system, the support system further comprising a hollow upper strut, a hollow lower strut, an upper disc fixedly connected to top of the upper strut and a lower disc fixedly connected to top of the lower strut, the upper strut is partially inserted into the lower strut, and the upper parts of the upper disc and the upper strut are exposed outside the lower strut; wherein the rotor wing system includes a plurality of upper rotor wings, a plurality of lower rotor wings, a plurality of upper springs, a plurality of lower springs, a plurality of upper connecting members and a plurality of lower connecting members.

Abstract: A dropsonde with a dandelion-like structure includes a support system, a rotor wing system, a rotor wing restraint system, a sensing main control system and an electrical damping system, the support system further comprising a hollow upper strut, a hollow lower strut, an upper disc fixedly connected to top of the upper strut and a lower disc fixedly connected to top of the lower strut, the upper strut is partially inserted into the lower strut, and the upper parts of the upper disc and the upper strut are exposed outside the lower strut; wherein the rotor wing system includes a plurality of upper rotor wings, a plurality of lower rotor wings, a plurality of upper springs, a plurality of lower springs, a plurality of upper connecting members and a plurality of lower connecting members.

Abstract: A wearable fNIRS brain imaging system, including a light source-photoelectric detector module, a control and wireless transmission module, a power source module, and an upper computer; the system is able to solve the problems in a wearable fNIRS brain imaging system or an EEG-fNIRS multi-modal brain imaging system where the relative position of a probe cannot be freely adjusted and a detection region is limited; in the present system, the relative positions of a light source probe and a photoelectric detector can be freely adjusted according to actual circumstances, and the distance between the two is automatically measured; a brain electricity sensor may be installed at the periphery of the light source probe and a bottom face of a cylindrical casing of the photoelectric detector, and distance therebetween synchronously changes with the probe, implementing EEG-fNIRS multi-modal brain imaging, and also able to capture brain electrical signals of differing densities.