摘要:
A method of calibrating a magnetic field sensor includes setting a first input signal at a first input node of a processor of the magnetic field sensor to a constant value. While the magnetic field sensor experiences a magnetic field, a first transition at an output node of the processor is measured. A second input signal at a second input node of the processor is set to the constant value. While the magnetic field sensor experiences the magnetic field, a second transition of at the output node of the processor is measured. An orthogonality error value is calculated based on a deviation of the first transition and the second transition. The first and/or second input signal is adjusted by modifying the first and/or second input signal by a function of the calculated orthogonality error value to compensate for the orthogonality error.
摘要:
Automatic test equipment with multiple components to generate highly accurate and stable analog test signals and method for operating the test system in semiconductor manufacturing process are disclosed. Output analog signals from existing test systems often fail the stability and accuracy requirement with less than 10 mV variations for testing certain electronic devices, due in part to environmental condition variations such as temperature fluctuations. Traditional compensation mechanisms for temperature variations involve time consuming and disruptive calibration procedures. Disclosed here is a system and method that provides near real-time monitoring and compensation for temperature-induced variations via a digital control mechanism that compensates for environmental variations in a time scale of less than 10 milliseconds and maintains the AC output analog signal with 10 milliVolt accuracy.
摘要:
본 발명은 다기능 미터 및 미터 교정기의 직류전압 기능 교정 장치에 관한 것이다. 본 발명의 다기능 미터 교정기의 직류전압 기능 교정 장치는 기준 포인트에 대해 기준값으로 교정되고, 제 1 플러스 단자, 제 1 마이너스 단자를 갖는 제 1 미터 교정기, 기준 포인트에 대해 기준값으로 교정되고, 제 2 플러스 단자, 제 1 마이너스 단자에 연결된 제 2 마이너스 단자를 갖는 제 2 미터 교정기, 제 1 플러스 단자와 연결되는 제 3 플러스 단자와 제 2 플러스 단자와 연결되는 제 3 마이너스 단자를 갖는 디지털 멀티 미터, 및 제 1 미터 교정기와 제 2 미터 교정기에 설정된 기준값에 근거하여 디지털 멀티 미터를 이용하여 전압값을 상향 변환 또는 하향 변환을 통해 다른 포인트들에 대해 직류전압을 교정하도록 제어하는 직류전압 교정 회로를 포함한다.
摘要:
The invention relates to a combination of at least three conductors (2,3,4) and at least three current sensors (6), wherein each current sensor (6) comprises: • - a body with a conductor reception space (5), wherein one of the at least three conductors (2,3,4) extends through the conductor reception space (5); • - a first magnetic field sensor arranged in the body at a first distance from the reception space (5); • - a second magnetic field sensor arranged in the body at a second distance, different from the first distance, from the reception space (5); • - a sensor controller for combining the output of the first and second magnetic field sensor to provide an output signal correlated to the current of a conductor (2,3,4) extending through the conductor reception space (5); and wherein the combination further comprises: • - a main controller (8) connected to each sensor controller for receiving the output signals of each current sensor (6), wherein the main controller (8) comprises calibration means for gathering calibration data and for correcting the output signals of the current sensors (6) for interfering magnetic fields.
摘要:
The invention concerns devices and methods for calibrating an Automated Test Equipment (102) for automated testing of a Device Under Test. According to an aspect of the invention, the method comprises providing at least two digital channel signals (501, 502) by at least two different channels (601, 602) of the Automated Test Equipment (102), wherein the digital channel signals (501, 502) comprise, except for a possible time shift relative to each other, an identical or a complementary pattern with respect to their edges (301, 302). The method further comprises sum-combining or difference-combining the at least two digital channel signals (501, 502) in order to obtain a combined residual signal (607). The step of combining is performed such that the combining provides a combined residual signal (607) without a time-variant component (609) if the at least two digital channel signals (501, 502) have a predetermined time shift (τ) or a predetermined phase shift (Δρ) relative to each other, or such that the combined residual signal (607) comprises a time variant component (609) if the two digital channel signals (501, 502) have a time shift different from the predetermined time shift or a phase shift different from the predetermined phase shift. The method further comprises measuring the combined residual signal (607) and determining a relative timing of the at least two digital channel signals (501, 502) relative to each other on the basis of the measurement of the combined residual signal (607).
摘要:
Die Anmeldung betrifft eine Messwiderstandskalibriervorrichtung (10), welche einen Messanschluss (24), einen Referenzwiderstand (30), einen Referenzanschluss (52) und einen Analog-Digital-Wandler (60) aufweist, wobei die Messwiderstandskalibriervorrichtung in einem Bauelement oder als Bauelement ausgeführt ist. Die Anmeldung betrifft des Weiteren ein zugehöriges Verfahren sowie einen Batteriesensor mit einer solchen Messwiderstandskalibriervorrichtung.
摘要:
A method and device for calibration of a three-axis magnetometer that facilitates a more efficient and routine procedure by calibration of hard and soft iron errors of a 3D-magnetometer integrated into a mobile electronic device, and a set of operations for coprocessing measurements of the 3D-magnetometer and inertial sensors (e.g., a 3D-accelerometer and 3D-gyro), which can determine magnetic heading and attitude of the electronic device.
摘要:
Die Erfindung betrifft ein Messsystem (200) zur Ausgleichsstrommessung an wenigstens einer elektrisch leitfähigen Stromsammlereinheit (20) eines elektrischen Energiespeichers (10), aufweisend eine Messvorrichtung (210) zur elektrischen Spannungsmessung an einem Messabschnitt (21) der Stromsammlereinheit (20), und eine Kalibrierungsvorrichtung (220) zur Einprägung zumindest eines elektrischen Kalibrierungsstroms (Ical) in diesem Messabschnitt (21), wobei wenigstens eine Kalibrierungsmessung derart durch die Messvorrichtung (210) und die Kalibrierungsvorrichtung (220) durchführbar ist, dass zumindest eine Störgröße der Ausgleichsstrommessung reduzierbar ist.
摘要:
An energy metering system includes a plurality of sensors arranged in proximity to circuit breakers of a distribution panel for sensing a magnetic field in the area of the circuit breakers and providing corresponding sensor data. The system further includes a data processing system for converting the sensor data of the plurality of sensors into electrical load information for a plurality of electrical circuits protected by corresponding circuit breakers. The system further includes a calibration unit configured to determine at least a reference voltage and a reference current of at least one circuit. The data processing system is configured to calibrate a relationship between the sensor data and the load information based on the reference voltage and reference current determined by the calibration device in a calibration mode of the energy metering system.
摘要:
A method of calibrating or correcting near field or far field data from a scanner board array of integrated measuring probes that are electronically switched to capture near- field data from an antenna-under-test (AUT) and having a board output includes the steps of coupling a calibrating probe with one of the measuring probes, measuring the power through the measuring probe and the calibrating probe and isolating the effect of the RF path from the measuring probe to the board output by removing the effect of the calibrating probe, and repeating for each measuring probe. Also disclosed are methods for correcting for scattering effects and loading effects on the AUT.