Paper color online detecting system for paper production line

Abstract

The invention discloses a paper color online detecting system for a paper production line, which comprises an online detecting system, a scanning frame and a control system which are used for drivingthe online detecting system to move, a computer data processing system, wherein the control system receives signals for controlling electrical structures in the scanning frame through an interface, transmits the signals to a drive unit of the scanning frame through an interface, and drives devices supporting and installing in the online detecting system to move; the control system performs data communication with the online detecting system, receives detection feedback signals of the online detecting system, and transmits the feedback signals to the computer data processing system for processing. The invention has the beneficial effect of in-time and accurately detecting paper color indexes in production process, performing non-contact detection on detection sensors and papers, automatically calibrating with a built-in color plate, having special paper stabilizing technology and functions of dynamic data real-time display, over-error detection alarm, recording detection results of production process, and establishment of a database for inquiry.

Description

technical field [0001] The invention relates to a measurement system, in particular to an online detection system used in a papermaking production line. Background technique [0002] The optical properties of paper include whiteness, chroma, opacity, etc., which belong to the diffuse reflection characteristics of paper, and are very important indicators for cultural paper, newsprint, decorative paper, high-grade coated paper and other paper types. According to the principle of colorimetry, chromaticity measurement includes lighting and observation conditions, observers (persons or observation instruments), and observation objects. The International Association of Illumination (CIE) has developed detailed standards. According to these standards, the paper industry aims at the optical properties of paper. There are corresponding national standards, and paper color measurement must meet the requirements of these standards. [0003] There are two types of instruments used for p...

AI Technical Summary

Problems solved by technology

This is because the contact measurement is easy to scratch the measurement object, and the glue, fiber, and dust on the surface of the paper are easy to contaminate the detection window and affect the measurement accuracy.

[0008] (2) Only multi-layer measurement

[0009] When measuring the chromaticity of paper, it is necessary to stack multiple layers of paper together to eliminate the influence of the light transmittance of the paper, especially the low-weight cultural paper with strong light transmittance, and the number of superimposed layers is more. For single-layer measurement, measure Accuracy cannot be guaranteed

On the production line, only single-layer measurements can be performed

[0010] (3) The measurement environment is demanding

[0011] Mainly for laboratory environment applications, the measurement accuracy cannot be guaranteed for the harsh working environment on the papermaking production line where the ambient temperature is as high as 70 degrees, heavy dust, high humidity, and strong static electricity

[0012] (4) The detection method lags behind

[0013] The existing detection method is that after a stage of the production process is completed, the finished paper is off-line, sampling is carried out, and the chromaticity value of the paper can only be known when it is sent to the laboratory for testing. However, it is unpredictable during this production process, that is, after-the-fact testing, which is seriously lagging behind. , the process cannot be adjusted in time, affecting product quality, and even producing defective products, reducing production efficiency

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