Abstract: A solar heat collection device for a near-zero energy consumption community, including a heat collection frame, a heat collector, a center of gravity adjusting frame and a self-adaptive angle adjusting assembly, wherein the heat collector is rotatably disposed on the heat collection frame through the self-adaptive angle adjusting assembly; the center of gravity adjusting frame is fixed on one side of the bottom of the heat collector; the self-adaptive angle adjusting assembly includes a fixing cylinder, an angle adjusting cylinder, an inner cylinder and a damping adjusting assembly; the inner cylinder is coaxially fixed inside the angle adjusting cylinder; two ends of the angle adjusting cylinder are respectively coaxially and rotatably connected with the fixing cylinder; and the damping adjusting assembly is arranged between the angle adjusting cylinder and the fixing cylinder.

Abstract: A solar heat collection device for a near-zero energy consumption community, including a heat collection frame, a heat collector, a center of gravity adjusting frame and a self-adaptive angle adjusting assembly, wherein the heat collector is rotatably disposed on the heat collection frame through the self-adaptive angle adjusting assembly; the center of gravity adjusting frame is fixed on one side of the bottom of the heat collector; the self-adaptive angle adjusting assembly includes a fixing cylinder, an angle adjusting cylinder, an inner cylinder and a damping adjusting assembly; the inner cylinder is coaxially fixed inside the angle adjusting cylinder; two ends of the angle adjusting cylinder are respectively coaxially and rotatably connected with the fixing cylinder; and the damping adjusting assembly is arranged between the angle adjusting cylinder and the fixing cylinder.

Abstract: The present invention belongs to the technical field of elemental analysis, and more particularly, relates to a dynamic calibration method for echelle spectrometer in laser-induced breakdown spectroscopy, comprising: S1: collecting a standard light source by using an echelle spectrometer; S2: in combination with a calibration function, calculating a pixel position coordinate ({circumflex over (x)},?) corresponding to a spectral wavelength ?; S3: performing dynamic searching and filtering near the pixel position coordinate ({circumflex over (x)},?) to obtain a set D of all pixel position coordinates, and adjusting all original intensity values in the set D to obtain intensity values F(Ix,y), and S4: calculating a spectral line intensity value after dynamic calibration by summing the adjusted intensity values F(Ix,y), thereby completing dynamic calibration of the result of the echelle spectrometer. The method in the present invention can overcome the shortcoming, i.e.

Abstract: The present invention belongs to the technical field of elemental analysis, and more particularly, relates to a dynamic calibration method for echelle spectrometer in laser-induced breakdown spectroscopy, comprising: S1: collecting a standard light source by using an echelle spectrometer; S2: in combination with a calibration function, calculating a pixel position coordinate ({circumflex over (x)}, ?) corresponding to a spectral wavelength ?; S3: performing dynamic searching and filtering near the pixel position coordinate ({circumflex over (x)}, ?) to obtain a set D of all pixel position coordinates, and adjusting all original intensity values in the set D to obtain intensity values F(Ix,y), and S4: calculating a spectral line intensity value after dynamic calibration by summing the adjusted intensity values F(Ix,y), thereby completing dynamic calibration of the result of the echelle spectrometer. The method in the present invention can overcome the shortcoming, i.e.

Abstract: Provided is a method for inhibiting self-absorption effect of a LIBS, comprising ablating a to-be-measured sample via a pulse laser thereby generating plasma, and selectively stimulating the plasma using a wavelength-tunable laser beam enabling transition of particles in a ground-state in the plasma to high energy state as stimulated absorption, thereby improving a stimulated absorption transition efficiency of the particles in a ground-state, and preventing plasma spectrum from being influenced by self-absorption effect. The invention is capable of eliminating the self-absorption effect without introducing external interference, obtaining original characteristics of emission spectrum from the center of the plasma, and essentially inhibiting and finally eliminating the self-absorption effect of laser plasma by making use of intrinsic physical property of plasma.

Abstract: Provided is a method for inhibiting self-absorption effect of a LIBS, comprising ablating a to-be-measured sample via a pulse laser thereby generating plasma, and selectively stimulating the plasma using a wavelength-tunable laser beam enabling transition of particles in a ground-state in the plasma to high energy state as stimulated absorption, thereby improving a stimulated absorption transition efficiency of the particles in a ground-state, and preventing plasma spectrum from being influenced by self-absorption effect. The invention is capable of eliminating the self-absorption effect without introducing external interference, obtaining original characteristics of emission spectrum from the center of the plasma, and essentially inhibiting and finally eliminating the self-absorption effect of laser plasma by making use of intrinsic physical property of plasma.