KR970048403A - Moisture measurement device of powder - Google Patents

Abstract

The present invention relates to a method and apparatus for irradiating near infrared rays and a laser beam on the surface of a powder to be measured for moisture, measuring light in a wavelength band absorbed in the moisture of infrared rays reflected on the powder surface, light in a wavelength band not absorbed by moisture, B (red, green, blue) color band and an optical mask through which only the used laser band is passed; CCD cameras sensitive to these wavelength ranges; An image processing unit for measuring light quantity of each wavelength band from an image signal captured by a CCD camera and extracting a profile of the laser line and binarizing the profile; And an arithmetic processing section for calculating the color and reflectance of the powder and estimating the particle size to correct the signal ratio of the light amount in the wavelength band absorbed in the moisture and the light in the wavelength band not absorbed in the moisture to measure the moisture content ≪ / RTI >

Description

Moisture measurement device of powder

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a schematic view of a conventional moisture measuring apparatus. FIG.

FIG. 2 is a graph showing measured values of a moisture meter by a conventional moisture measuring apparatus.

FIG. 3 is a schematic view of the moisture measuring apparatus of the present invention. FIG.

FIG. 4 is a state diagram showing the optical mask of the present invention. FIG.

5a and 5b also show profiles of surface particle size and FFT processing results.

6 is a graph showing moisture measurement values by image processing of the present invention.

Description of the Related Art [0002]

1: infrared light source 2: condensing lens

3: rotating disk 4: mirror reflecting mirror

5: powder 6: concave mirror

7: Convex mirror 8: Infrared detection sensor

9: amplifier 10: synchronous rectifier

11: rotational position sensor 12: synchronous signal generator

13: operation unit 15: optical mask

16: CCD camera 17: Image processing section

18: operation processing unit 19: ultraviolet cut filter

20: Laser light source 21: Line generator

22: Reflected light condensing mirror 23: Zoom lens

Claims (1)

A laser irradiating means comprising a laser light source 20, a selector beam generator 21 and a reflected light condensing mirror 22 for obliquely irradiating the surface of the powder 5 with a laser beam; Infrared irradiation means comprising an infrared light source (1), a condenser lens (2) and an ultraviolet cut filter (19) for irradiating the surface of the powder (5) with infrared rays; Of the laser light reflected from the powder (5) (λ _R), the powder (5) of light and the wavelength band (λ ₁₎ is absorbed by the moisture in the infrared, that is not absorbed in the water the wavelength band that is reflected from (λ ₂ ) And an optical mask 15 for passing only the visible light of the red, green, and blue color wavelength bands (R, G, B); A CCD camera (16) for detecting and capturing an amount of light of a band wavelength passed through the optical mask (15); (Tonal values;? _R ,? ₁ ,? ₂ , R, G, B) of each wavelength band are measured from the captured image signal of the CCD camera 16 and the profile (? _L ) An image processing unit 17 for performing image processing; And determining the type of the object to be measured from the color signal gradation values (R, G, B) and subjecting the profile value (? _L ) of the binarized laser beam to FFT processing to obtain a grain size correlation index (Pi) and an arithmetic processing unit (18) for calculating the moisture corrected from the particle size indexes (? _R ,? ₁ ,? ₂ , R, G, B) and the particle size index (Pi). ※ Note: It is disclosed by the contents of the first application.