Form Of Triangular Prism Research Articles

Design and simulation of capacitive sensor for grain moisture detection

The high moisture content of grain would result in quality deteriorations such as mold and mildew during storage and transportation. For effective detection of grain moisture, a forked-finger capacitive sensor in the form of triangular prism is proposed. The effect of the sensor structural parameters on its capacitance, electric field distribution, sensitivity and penetration depth are investigated using finite element simulations. The results show that an optimised effective penetration depth of 2.73 mm for grain moisture detection can be achieved when the finger width, number, length and spacing are 50 μm, 25.4 mm and 50 μm, respectively. This work may provide a new approach for the structural design of capacitive grain moisture sensors.

Measuring the refractive index on a goniometer in the dynamic regime

Goniometers with ring lasers and other automatic goniometers operate in the dynamic regime, i.e., they have a continuously rotating object table with a prism. This article is devoted to a new method of measuring the refractive index of materials on a dynamic goniometer using the least-deviation method. The material carrier of unit refractive index is a sample in the form of a triangular prism or a liquid placed in a cell in the form of a hollow triangular prism. The fundamental optical layout of the measurement method is shown, and its metrological characteristics are considered. The proposed measurement method is implemented in the State Primary Standard Unit Refractive Index.

Mesoscale deformation and cracking of surface-hardened low carbon steel

Mesoscale deformation patterns of surface-hardened low-carbon steel is investigated by using the television-optical measuring technique (TOMSC-1). Surface hardening was performed by diffusion borating to produce a hardened layer with a heterogeneous structure. Plastic flow at the mesoscale level was observed for primary mesovolume in the form of triangular prism. Self-organization of neighboring primary mesovolume gives rise to formation specimen macrostructure. At certain thickness of borated layer, the tensile elongation is increased by 30% for specimens with brittle-hardened layer when compared with unhardened specimens.