Abstract: A device for measuring magnetism of a permanent magnet material at a high temperature includes a laser device, a power controller, a light beam controller, a temperature controller, a magnetism measurement unit, temperature sensors, and electromagnet pole heads. The electromagnet pole heads are divided into an upper piece and a lower piece for clamping upper and lower surfaces of a sample. Heat absorbing sheets are respectively fixed on front and rear surfaces of the sample. Temperatures of the heat absorbing sheets are measured by the temperature sensors. The sample is heated by laser, and the temperature controller is used to adjust a ratio of light beams of the power controller and the light beam controller irradiating the heat absorbing sheets on the front and rear surfaces of the sample, thus adjusting the temperatures of the heat absorbing sheets. The magnetism of the sample is measured using the magnetism measurement unit.

Abstract: An underwater body for remotely operated vehicle which includes: main control system which communicates with the control center above the water with optical composite cable and receive remote control command from the center above water and upload the video information and sensor data for subsea; rotation platform equipped with video receiver, and the input terminal of the rotation platform is connected with the main control system, while the main control system controls the rotation platform according to the control command and cause the video receiver to rotate; sensor system comprising sonar component, the sonar component would detect the subsea environment in real-time manner and transmit the subsea environment information to main control system, where the main control system deliver movement control command to the movement component of the underwater body based on the subsea environment information. Optical fiber transmission technology is adopted in this invention disclosure.