Double-color laser ore grinding particle size on-line analyzer
An analyzer and laser technology, which is applied in the field of laser particle size analyzer, can solve the problems of expensive optical system, low signal-to-noise ratio, and the light angle cannot accept or distinguish light energy signals well, so as to reduce the cost and simplify the structure of the optical system Effect
Inactive Publication Date: 2015-11-25
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0004] Due to physical interference, the particle size analyzer with the structure of the light scattering method cannot accept or distinguish the light energy signal well when the light angle corresponding to the particles of certain sizes is too large or too small, and the signal-to-noise ratio is extremely low, so it needs complicated , expensive optical system and optical signal data acquisition system, resulting in very expensive existing instruments capable of measuring particle size distribution
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[0012] The specific embodiment of the present invention is described in conjunction with accompanying drawing, as figure 1 As shown, the two-color laser grinding particle size online analyzer sequentially includes a transmitting unit, an optical system, a receiving unit, a signal processing and a control unit;
[0013] The emitting unit includes two infrared semiconductor laser diodes, which are respectively an infrared semiconductor laser diode 1 placed in parallel and an infrared semiconductor laser diode 2 placed vertically;
[0014] Described optical system comprises right-angle prism 3, sample pool 4 and Fourier imaging lens 5 in turn; The light that the infrared semiconductor laser diode 1 that is placed in parallel enters from a right-angle surface of right-angle prism 3, emits from the inclined plane, and the infrared semiconductor that vertically places The light emitted by the laser diode 2 is reflected from the slope of the rectangular prism 3, and the light emitted...
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The invention relates to a laser particle analyzer, and concretely relates to a double-color laser ore grinding particle size on-line analyzer. The analyzer comprises an emission unit, an optical system, a reception unit and a signal processing and controlling unit. The emission unit comprises two infrared semiconductor laser diodes, one is parallelly arranged and the other one is vertically arranged; light emitted from the parallelly arranged infrared semiconductor laser diode enters from a right angle surface of a rectangular prism and emits from an inclined plane, light emitted from the vertically arranged infrared semiconductor laser diode is reflected from the inclined plane of the rectangular prism, light emitted from the two infrared semiconductor laser diodes merge on the inclined plane of the rectangular prism, and light passes through a sample cell and a Fourier imaging lens in order. According to the double-color laser ore grinding particle size on-line analyzer provided by the invention, data of light signals with low signal to noise ratios are not needed to be acquired, and thereby simplifying the optical system structure and reducing cost.
Description
technical field [0001] The invention relates to a laser particle size analyzer, in particular to a particle size analyzer which uses the principle of laser scattering to measure the distribution of grinding particle size, namely a two-color laser grinding particle size online analyzer. Background technique [0002] Grinding and classifying operations play a very important role in the production of metallurgical mines, non-ferrous mines, some gold and non-metallic mines. At present, the actual grinding particle size detection method is manual detection, the process is cumbersome, and the working conditions are poor. The main disadvantage is that the cycle is long, which cannot meet the real-time and online requirements of automatic control. [0003] For general particle testing, the main methods are microscopy, sieving, sedimentation, photon coherence, mass spectrometry, and light scattering, each with its own advantages and disadvantages and scope of application. Relatively ...
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Inventor 郝成杨志刚王建民
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY