3 results about "Dielectric spectroscopy" patented technology

A device for performing electrical and rheological measurements of a material sample, the device comprising: a first plate; a second plate; a rotatable drive shaft extending from the motor to rotate the first plate relative to the second plate; and a sample gap between the first plate and the second plate. The second plate includes a first electrode and a second electrode that receive a voltage and form an electric field at the sample gap.

The invention discloses a method, a device and a system for evaluating water content of insulation paper in an oil-immersed transformer, and belongs to the technical field of electrical equipment monitoring. The method comprises the following steps: on the basis of a frequency spectrum set of non-oil-immersed insulation paper with respect to water content, calculating frequency spectrums of oil-immersed insulation paper in a to-be-detected transformer under different water contents by adopting a formula # imgabs0 # to form a frequency spectrum set A, and further calculating to obtain frequency spectrums of main insulation of the to-be-detected transformer under different water contents to form a frequency spectrum set B; and taking the moisture content corresponding to the frequency spectrum with the minimum deviation with the main insulation frequency spectrum of the to-be-detected transformer in the frequency spectrum set B as a moisture content evaluation result of the insulation paper in the to-be-detected transformer. According to the method, the influence of the dielectric properties of different oil on the main insulation frequency spectrum of the transformer is fully considered, the influence of the dielectric properties of different oil on the water content evaluation result is effectively eliminated, and the water content evaluation precision of the insulation paper in the oil-immersed transformer is relatively high; the applicability and the reliability of water content evaluation of the frequency domain dielectric spectrum method under the field complex condition are improved.

This disclosure relates to the use of dielectric spectroscopy for selecting cells, typically cells engineered by recombinant methods, but also to hybridoma cell lines that produce antibodies and express peptides such as antibodies; CAR-T cells; induced pluripotent stem (IPS) cells; and cells derived from IPS cells.