The invention relates to an ocean profile loop detection
buoy for collecting temperature,
salinity and other profile data of ocean water. The ocean profile loop detection
buoy structurally comprises a cylindrical pressure-resistant case body, an upper end cover and a lower end cover, wherein the upper end cover is provided with a sensor and a
satellite antenna, a hydraulic
plunger pump is arranged inside the pressure-resistant case body, the cylindrical pressure-resistant case body is short and thick and comprises an outer case and an inner case, the outer case is sleeved outside the inner case, the outer case and the inner case are in close fit with each other and can move, the upper and the lower end covers are respectively connected with the outer case and the inner case through upper and lower flanges, a
hydraulic cylinder is mounted inside the case body, a cylinder tube and a
piston rod of the
hydraulic cylinder are respectively fixed on the upper and the lower flanges, and the hydraulic
plunger pump is communicated with the cylinder tube. By adopting the
hydraulic cylinder as a drive source, the volume of the
buoy can be changed. The case body has the short and thicker cylindrical structure, so that the length of the buoy is reduced, the
diameter of the buoy is increased, and the height of center of gravity of the buoy is lowered, as a result, the buoy can be protected against the
impact caused by ocean currents and
waves and remain stable.