摘要:
The disclosure describes techniques for detecting a crack or defect in a material. The technique may include applying an electrical signal to a first electrode pair electrically coupled to the material. The method also may include, while applying the electrical signal to the first electrode pair, determining a voltage between a second, different electrode pair, where at least one electrode of the second, different electrode pair is electrically coupled to the material. The method further may include determining whether a crack or other defect is present in the material based on the voltage.
摘要:
Method of determining the quality of motor-car fuel in accordance with the invention is characterized by the fact that with experimental methods the impedance calibration curve is determined, after which the impedance as a function of the frequency of resonator element (2) submerged in the fuel tested and stimulated by electric signal from generator (1), then from the measured impedance characteristics as a function of frequency, the field of circle on the complex plane of Nyquist plot ('Z, Z") is determined characteristic for the composition of the fuel mixture tested on the basis of which the fuel composition is determined. The device is equipped with generator (1) connected to the resonator (2), which by vector voltmeter ammeter (3) and vector ammeter (4) is connected to arithmetic system (5) connected to micro-controller (12).
摘要:
A PoE power utilization method constituted of: detecting a first function of a voltage between a current path node (20) and a current return path node (30) during a first time period and during a second time period, the second time period different than the first time period; sensing a second function of the magnitude of a current flowing through the current path (70) during the second time period; responsive to the detected first time period voltage function, the detected second time period voltage function and the sensed second time period current magnitude function, determining a third function of a resistance seen by the current path (70); and outputting an indication of the determined resistance function.
摘要:
El método comprende, de manera secuencial y automática: a) aplicar unas señales de tensión alterna de entrada de distintas frecuencias entre unos electrodos (E1, E2) en contacto y/o insertados en una muestra de material fibroso (M); b) obtener una pluralidad de valores de la corriente circulante por la muestra (M); c) calcular la resistencia eléctrica equivalente de la muestra (M) a partir de la aplicación de una función estadística sobre dos o más de los valores de corriente obtenidos en b) y/o sobre unos valores calculados a partir de los mismos; y d) determinar, mediante cálculo, el grado de humedad de la muestra (M) a partir del valor de resistencia eléctrica equivalente determinado. El sistema y el programa de ordenador están ambos adaptados para implementar el método de la invención.
摘要:
배터리 팩의 프리차지 저항 산출 장치 및 방법이 개시된다. 본 발명에 따른 배터리 팩의 프리차지 저항 산출 장치는, 배터리 팩 및 프리차지 저항 사이에 직렬로 연결된 부하 저항 상기 배터리 팩에 상기 부하 저항이 설치되지 않은 무부하 상태의 무부하 전압 또는 상기 부하 저항이 설치된 부하 상태에서 상기 부하 저항이 소정의 전류값을 가질 때 상기 부하 저항에 인가되는 부하 전압을 측정하는 전압 측정부; 및 상기 배터리 팩의 상기 무부하 전압, 상기 부하 전압 및 상기 소정의 전류값을 이용하여 상기 배터리 팩의 프리차지 저항을 산출하는 프리차지 저항 산출부를 포함한다.
摘要:
Method for calculating model parameters for a coil (L), comprising of: incorporating the coil into a converter (1) with a switching element (2); connecting a resistive load (9); applying an input voltage (U in ); controlling the switching element in order to obtain a periodically varying voltage across the coil; measuring at least a first and second quantity representative of respectively the voltage (U L ) across and the current (i L ) through the coil; determining at least one voltage value and at least one current value on the basis of the measured first and second quantity; calculating a loss resistance and/or a loss power of the coil on the basis of the at least one voltage value and the at least one current value.
摘要:
PDs that can be supplied through the LAN line are discriminated from PDs that cannot be so supplied in function of the resistance of the supply line and of the voltage drop Vdrop caused by nonlinear elements in series therewith. The values of these two parameters are estimated by applying two distinct voltages to the supply terminals of the LAN line and sensing the relative steady-state currents absorbed by the power supply line and by processing voltage and current values for estimating the resistance (Rdet) of the line and the voltage drop (Vdrop) caused by nonlinear elements connected in series therewith.
摘要:
ABSTRACT OF THE DISCLOSURE Methods to determine an instantaneous resistance value of an electric circuit and a measurement system to determine an instantaneous resistance value of an electric circuit are disclosed. Exemplary embodiments of the method measure an in-situ instantaneous voltage of the circuit and an in-situ instantaneous current of the circuit and calculate the instantaneous resistance. Optional temperature measurement can be included in the method and the calculated instantaneous resistance related to the measured temperature. The method can be applied to phase angle fired loads and to zero-cross (time proportioned) loads.
摘要:
본 발명은 하나의 핀으로 센서의 식별 값을 출력하는 착탈식 센서 모듈, 착탈식 센서 모듈의 센서를 하나의 핀으로 식별하는 센서 식별 장치 및 센서 식별 방법에 관한 것으로서, 센서 모듈은 적어도 하나 이상의 센서 측정 값을 출력하는 센서, 및 상기 센서에 상응하는 센서 식별 값을 아날로그 형태의 전압으로 단일 채널을 통해 출력하는 식별값 출력 회로부를 포함한다.