A composition ratio estimation device estimates a composition ratio of a content having mixed substances with different boiling points in a tank. The content is retained as a liquid in the tank lower part. The substances are partially floatable as a gas or liquid in a space in the tank upper part. The device includes a reference object disposed in the space, a transmitting-receiving unit that transmits radar waves toward the reference object and the surface of the liquid and receives reflected radar waves, a temperature measuring unit that acquires a level at which a boiling point of a floating substance is reached, a dielectric constant calculating unit that stores in advance a physical distance between the unit and the object and calculates a dielectric constant of a space between the unit and the object, and a composition ratio derivation unit that derives a composition ratio of the liquid.

The measurement device for measuring permeability and permittivity of an object, includes a probe in which a signal transmission line is formed and on which the object is capable of being disposed close to or in contact with the signal transmission line; a magnetic-field application unit configured to apply a magnetic-field to the object; a signal measurement instrument configured to measure a signal transmitted through the signal transmission line in each state in which the object is disposed and not disposed on the signal transmission line and in each state in which the magnetic-field is applied and not applied; a permeability processing unit configured to obtain the permeability of the object; and a permittivity processing unit configured to obtain the permittivity of the object, the both units obtaining based on the signal transmitted through the signal transmission line in each state in which the magnetic-field is applied and not applied.

The present invention discloses an insulation detection circuit and a detection method thereof for a two-way on-board charger. The detection circuit comprises an inverter circuit, a first Y capacitor connected between an output live line and a ground line of the inverter circuit, a second Y capacitor connected between an output neutral line and the ground line of the inverter circuit, a live line sampling circuit and a neutral line sampling circuit which are connected with the output live line and the output neutral line of the inverter circuit, and a controller. The controller determines an insulation state of the two-way on-board charger according to two sampling voltages.

Disclosed is a single-ended test method for the wave-absorbing characteristic of a material. The device comprises a sample cavity, a microwave transmission rod, spring needles, an SMA joint and a vector network analyzer, wherein one end of the sample cavity is provided with a test fixture; the microwave transmission rod is arranged in the sample cavity and is connected with the test fixture in a penetrating mode; the spring needles are arranged in the microwave transmission rod; the SMA joint is arranged at the other end of the sample cavity; the receiving end of the vector network analyzer is electrically connected with a coaxial cable, and the other end of the coaxial cable is electrically connected with the other end of the SMA joint.

The present invention relates to a non-invasive Capacitance Level Detector useful for continuous detection of the level and/or mass of a non-conductive or weakly-conductive bulk material in a vessel, and methods of using the detector.

Various embodiments provide for determining a capacitance (or capacitor value) of a circuit, determining a resistance-capacitance time constant (or RC time constant) of a circuit, or both. The circuit can comprise an integrated circuit (IC), such as a circuit implemented on die. An IC of some embodiments generates a frequency of a dock wave signal (e.g., an output signal) such that the clock wave signal encodes an effective capacitance of the IC, a RC time constant of the IC, or both. A component external to the IC, such as a controller, can receive the clock wave signal and determine the effective capacitance of the IC, the RC time constant of the IC, or both based on the received clock wave signal.

A method and system of a method of measuring complex dielectric constant and permeability includes directing two polarizations onto a material under test and measuring one or more values of reflection coefficients. Further, the method includes integrating a p-wave reflection coefficient and a s-wave reflection coefficient and calculating, based on the measured one or more values of the reflection coefficients in association with a Brewster's angle, one or more of a complex dielectric constant and permeability.

The present invention provides a general four-port on-wafer high frequency de-embedding method. The method comprises: for each on-wafer de-embedding dummy, building a model considering the distributive nature of high frequency characteristics of the on-wafer de-embedding dummy; obtaining the intrinsic Y-parameter admittance matrix of said N on-wafer de-embedding dummies by calculation or simulation by using said models; and solving the equation set which the corresponding measurement and calculation or simulation data of said on-wafer de-embedding dummies satisfy for the elements of the related admittance matrices of the parasitic four-port network to be stripped in de-embedding and model parameters of models on which said calculation or simulation is based.

A measurement device includes an electric field generator, an electric field detector, a thickness gauge, and a processor. The electric field generator generates an alternating current electric field. The electric field detector detects the alternating current electric field generated by the electric field generator. The thickness gauge measures a thickness of a measurement target in a non-contact manner. The processor derives a calibration curve representing a relationship between a specific dielectric constant and an intensity of an alternating current electric field. The measurement target is insertable between the electric field generator and the electric field detector. The electric field detector detects an intensity of the alternating current electric field attenuated by the measurement target. The processor calculates a specific dielectric constant of the measurement target based on the detected intensity of the alternating current electric field, the measured thickness, and the derived calibration curve.

Provided herein are systems, methods and apparatuses for a Biomarker sensor.