Realtime densitometer for glass wool using solar cells

Abstract

An optical method to measure the weight density of raw glass wool has been developed for use in a manufacturing plant. The method is based on the light attenuation theory. The system consists of the usual white light as a light source, a solar cell as a light-sensitive receiver, an amplifier, a personal computer with an A/D converter for data acquisition and a monitor for display of the data. The accuracy of the system was found to be above 98% and the system can be effectively applied to practical use in the factory. The system may be further applied for quality control in manufacturing raw glass wool.

Nondestructive Method for Measuring the Local Weight Density of Glass Wool Pipe.

“…Strictly speaking, the linearity between the received light intensity and the gap deviates slightly due to the noise lights such as a diffraction light at the edge of the gap and a laser speckle. However the intensity of these noise lights is rather small compared with the total received light in- local weight density, i. e., the accuracy of the measurement, was above 90% under the condition described in (1). We are currently developing our system for practical applications.…”

Ultrafine Glass Fibers Produced by Centrifugal-Spinneret-Blow Process

“…Glass fibers feature extremely low thermal conductivity,high modulus,high toughness, chemical durability,light weight and non-combustible property [1],so they have been widely used as high-quality heat-insulating and sound-absorbing materials in automobiles and buildings [2], reinforcing phase in composite materials [3],separators to insulate electric current in batteries [4],core material in vacuum insulation panel [5].In principle,all glass fibers can be used for insulationmaterials in construction.However,sub-nanometer-thin glass fiber(diameter d<0.6µm)is preferablefor filters;micron-thin glass fiber(d=0.6µm~1.0µm)for glass paper,glass cardboard and adsorbents;ultrafine glass fiber(d=1µm~4µm)for superlight heat-insulation and sound-absorbing materials andinsulation for equipment operating at high temperatures;thin glass fiber(d=4µm~12µm)forheat-insulation and acoustic technical or constructional parts;thick glass fiber(d=12µm~15µm)forheat and sound insulation in construction and for reinforcement of waterproof;coarse glass fiber(d≥25μm)for concrete reinforcement [6].…”

Effect of Vitreous Fluid Temperature on Fiber Diameter and Surface Topography of Glass Wool by Centrifugal-Spinneret-Blow Process

“…For its extremely low thermal conductivity, light weight, low moisture absorption, stable chemical property, and non-combustible property, glass wool has been widely used for dust-proof papers in semiconductor factories, separators to insulate electric current in batteries, heat-and sound-resisting mats employed in automobiles and buildings [1][2][3]. The efficiency of the finished products (panel, felt and pipe) mainly depends on the manufacturing process and the weight density of raw glass wool.…”