Systems and methods for measuring alternating current (AC) voltage of an insulated conductor (e.g., insulated wire) are provided, without requiring a galvanic connection between the conductor and a test electrode or probe. A non-galvanic contact (or non-contact) voltage measurement system includes a plurality of conductive sensors which capacitively couple with the insulated conductor. At least one processor receives signals indicative of the voltages at the conductive sensors due to the AC voltage in the insulated conductor, and determines the AC voltage in the insulated conductor based at least in part on the received signals.

A voltage detecting probe includes: a shield barrel that is a barrel-shaped member made of an electrically conductive material and has an insertion concave for inserting a wire formed in a front end thereof by cutting away an outer circumferential wall at the front end along a direction perpendicular to an axis; and a detection electrode that is formed of a cylindrical member made of an electrically conductive material, whose front end surface and outer circumferential surface are covered with an insulating covering, and is housed inside the shield barrel and capable of moving relative to the shield barrel along the axis direction. When the detection electrode has been moved relative to the shield barrel and the front end surface is positioned at the insertion concave, the front end surface becomes capacitively coupled, via the insulating covering, with a wire inserted in the insertion concave.

A controller including a memory having computer-readable instructions stored therein; and a processor configured to execute the computer-readable instructions to: estimate a synthesized grid voltage vector angle at a terminal of an alternating current (AC) grid based on at least an adjusted angle, to generate Pulse Width Modulation (PWM) signals to control power switches of the AFE inverter based on at least the synthesized grid voltage vector angle, and to control the AFE inverter to exchange power between the AC grid and a load based on the PWM signals.

According to some examples, systems and methods are provided for voltage sampling using one or more analog-to-digital converters (ADCs) to sense divided portions of a sampled voltage (e.g., of an output signal), using the one or more analog-to-digital converters to provide a plurality of digital values representative of those divided portions, and combining the plurality of digital values to produce a total digital value representative of the sampled voltage. Such systems and methods can achieve a high resolution for the total digital value while permitting use of ADCs that have a resolution lower than would otherwise be required to achieve the high resolution.

The present disclosure relates to a battery current monitoring method, a controller and a circuit. The method is applied to a current monitoring circuit, the current monitoring circuit includes a hall sensor, a controller and a constant voltage source. The current monitoring method includes: acquiring, by the controller, an output voltage of the constant voltage source and a first analog-to-digital conversion value of the output voltage of the constant voltage source; determining an analog-to-digital conversion correction coefficient based on the output voltage of the constant voltage source and the first analog-to-digital conversion value; acquiring a second analog-to-digital conversion value of an output voltage of the hall sensor and a third analog-to-digital conversion value of a supply voltage of the hall sensor; and determining the battery current based on the analog-to-digital conversion correction coefficient, the second analog-to-digital conversion value and the third analog-to-digital conversion value.

Disclosed is a device and method for monitoring a common mode voltage. There is provided the device for monitoring a common mode voltage including an input end connected to a node between an energy storage device and a power conversion device, a voltage divider that divides a voltage applied to the input end, a comparator that compares an output of the voltage divider and a reference voltage, and a controller that detects an abnormality in a voltage applied from the power conversion device to the energy storage device based on an output of the comparator.

A power consumption measurement assembly includes: at least two sampling modules respectively connected to a circuit to be measured in series; a gating module configured to gate one of the at least two sampling modules; an amplifying module configured to acquire and amplify a voltage signal across the gated sampling module; and a processing module connected to the gating module and the amplifying module and configured to: control and adjust the gated sampling module and an amplification of the amplifying module, calculate a power consumption value based on the amplified voltage signal and transmit the power consumption value.

A detection device includes a housing, a wall detection assembly, a multimeter assembly, and a circuit setting layer. The wall detection assembly includes a wall detection processing circuit and a sensor assembly. The multimeter assembly includes a multimeter measurement circuit. Both the circuit setting layer and the sensor assembly are located inside the housing. The housing consists of a top housing and a bottom housing that fit together. The circuit setting layer has a first setting surface facing the bottom housing, which includes a first setting area and a second setting area partitioned for different functions. The wall detection processing circuit is located in the first setting area, and the multimeter measurement circuit is located in the second setting area. The sensor assembly is located in the bottom housing and positioned opposite the first setting area.

A detection device includes a housing, a wall detection assembly and a multimeter assembly, wherein the wall detection assembly comprises a sensing assembly and a wall detection processing circuit, the sensing assembly comprising at least one of a metal detection sensing element, a foreign object detection sensing element and an alternating-current voltage signal sensing element; wherein the sensing assembly and the wall detection processing circuit are arranged spaced apart in a first direction the sensing assembly and the multimeter assembly are arranged staggered in a second direction; and the sensing assembly is mounted to an inner side wall of the housing via a connection structure which is a non-metallic material structure. The staggered arrangement of the sensing assembly and the multimeter assembly adopts a staggering with a spatial distance, thereby reducing the adverse effects of large-volume metallic components and parts of a multimeter on the sensing assembly.

A digital voltmeter, where a number of clock pulses for a first ramp voltage to reach an input voltage is determined. Next, a number of clock pulses for a second ramp voltage to reach the input voltage is determined. One of the first and the second ramp voltages having a least number of clock pulses to reach the input voltage is determined. A determination is made for a number of clock pulses for the determined one of the first and the second ramp voltages to reach a reference voltage. A digital code is generated for the input voltage based on the determined number of clock pulses for reaching the reference voltage and the determined least number of clock pulses for reaching the input voltage.