The invention provides a method for measuring a dual-jet direct-current arc
plasma space temperature field in real time, and belongs to the technical field of hot
plasma temperature measurement. The method is characterized in that in a real-time measurement
system, internal and external parameters of given cameras are worked out, calibration and stereo correction are conducted, two matched target images preprocessed through a set
parallax deviation are obtained, the intensities of spectral lines on corresponding pixel points at the same moment are obtained from a
spectrograph, a gray value-
spectral line intensity mapping table is built, and the
electron excitation temperature of a spatial point corresponding to the similar spectral lines is calculated through the relative intensities of the spectral lines, wherein the real-time measurement
system is composed of a
plasma generator, an image
information acquisition device, a spectrum acquisition device and a computer, the image
information acquisition device is formed by splicing the two CCD cameras, optical filters with different central wavelengths are arranged in front of lenses on the two sides, the spectrum acquisition device is mainly composed of the
spectrograph, and the computer is connected with a triggering
signal output card used for synchronously triggering the two CCD cameras and the
spectrograph. The method is simple and feasible, the resolution ratio and
temperature measurement accuracy are high, and dynamic performance is good.