6results about "Ac/dc measuring bridges" patented technology

Provided is an electric current sensor comprising: a first bus bar (10A), a second bus bar (10B), and a third bus bar (10C) through which a three-phase AC current flows; a first sensor unit (20A) having a first magnetic detection element (30A) and a second magnetic detection element (30B); and a second sensor unit (20B) having a third magnetic detection element (30C) and a fourth magnetic detection element (30D), the first sensor unit (20A) being disposed between two bus bars other than one arbitrary bus bar to be measured from among the first through third bus bars, the second sensor unit (20B) having as a measurement object one of the two bus bars other than the one bus bar to be measured, and being disposed between the one bus bar to be measured and the other of the two bus bars other than the one bus bar to be measured, the distance between the first magnetic detection element (30A) and the one of the two bus bars other than the one bus bar to be measured and the distance between the second magnetic detection element (30B) and the other of the two bus bars other than the one bus bar to be measured being substantially equal, and the distance between the third magnetic detection element (30C) and the other of the two bus bars other than the one bus bar to be measured and the distance between the fourth magnetic detection element (30D) and the one bus bar to be measured being substantially equal.

The invention relates to a pressure sensor and a sensor. The pressure sensor comprises a sensor element (WB) in the form of a Wheatstone bridge and having four piezoresistive resistors (R1, R2, R3, R4), and a reference element (RW) in the form of a reference Wheatstone bridge and having four piezoresistive reference resistors (R5, R6, R7, R8), the reference resistors (R5, R6, R7, R8) being arranged in the same way as the resistors (R1, R2, R3, R4), the pressure sensor being arranged on a single crystal and comprising a cavity closed on one side by a diaphragm, the resistors (R1, R2, R3, R4) being arranged at least partially on the diaphragm, the reference resistors (R5, R6, R7, R8) not being arranged on the diaphragm, the first to fourth resistors (R1, R2, R3, R4) respectively being identical to the fifth to eighth resistors (R5, R6, R7, R8) in that they are constructed in the same way, and the reference Wheatstone bridge (RW) serving as a reference noise source for subsequent signal processing.

A magnetic sensor comprises at least one bridge circuit and a plurality of magnetoresistive elements. The at least one bridge circuit comprises a first resistance section, a second resistance section, and a third resistance section. Each of the magnetoresistive elements comprises a magnetization-fixed layer with a magnetization whose direction is defined. The plurality of magnetoresistive elements comprises first, second, and third magnetoresistive elements, each forming first, second, and third resistance sections, respectively. The magnetization directions of the magnetization-fixed layer of the first magnetoresistive element, the magnetization directions of the magnetization-fixed layer of the second magnetoresistive element, and the magnetization directions of the magnetization-fixed layer of the third magnetoresistive element intersect at angles other than 0 degrees and 180 degrees.

The application discloses an improved device for conductor online measurement of direct current resistance, and relates to the technical field of electrical measurement, comprising a digital display bridge and a clamp mechanism, wherein the clamp mechanism comprises a linear slide rail, a moving seat is arranged on the linear slide rail, a clamp arm mechanism is arranged at the top end position of the moving seat, a locking mechanism is arranged between the moving seat and the linear slide rail, a locking driving mechanism is arranged at the bottom of the inner cavity of the moving seat, and a blocking mechanism is arranged at the top of the inner cavity of the moving seat and is driven to move up and down by the locking driving mechanism. The locking driving mechanism and the blocking mechanism are arranged between the locking mechanism and the clamp arm mechanism on the moving seat, so that the clamp arm mechanism can clamp the conductor, the sequential control between the locking mechanism and the clamp arm mechanism is established, the damage of the conductor caused by misoperation is avoided, and the accuracy of the positioning of the conductor measurement position is ensured.

This disclosure provides an interconnect structure impedance measurement circuit. By optimizing the Wheatstone bridge structure, it employs three parallel branches. In one branch, the interconnect structure to be measured is connected in series. In the other two branches, two resistors are connected in series. By controlling the branch containing the interconnect structure and one of the other two branches to be simultaneously turned on, the voltage between the two turned-on branches is measured. The impedance of the two interconnect structures is calculated based on the current flowing into the interconnect structure impedance measurement circuit, the measured voltage, and the resistance in the branches. This disclosure allows for convenient, large-scale, and accurate measurement of interconnect structure impedance, and enables real-time and accurate monitoring of the impedance of a single interconnect structure in reliability experiments. This disclosure also provides an interconnect structure impedance measurement device and method.