摘要:
A power distribution unit (PDU) disposable in an electrical equipment rack. The PDU has a housing, a power input penetrating the housing, outlets in the housing, a processor disposed in the housing, voltage and current sensors, and a voltage calculation procedure communicable with the processor. The processor samples voltage and current waveforms and calculates RMS values and other power parameters. A method of managing electrical loads each drawing electrical power from a PDU includes repeatedly sampling voltage across and current flowing through each of the loads, calculating raw RMS values of voltage and current, and scaling the raw RMS values to obtain corrected RMS voltage and current values and other power parameters.
摘要:
The present invention relates to a system for controlling, measuring and monitoring the secondary electric power distribution grid with remote fraud and power theft detection, readings, power cuts-off, reconnection and client load control, besides continuous monitoring of the electric grid parameters, providing diagnostics on the status of the grid and public lighting from an assigned Command Central, located at the secondary busbar of the distribution transformer, and Measuring Modules at clients installations.
摘要:
A method includes lowering a sensor unit in a tank, where the tank is capable of receiving a material. The method also includes determining a first distance between the material and the sensor unit and determining a second distance between the sensor unit and a main unit that lowers the sensor unit. In addition, the method includes determining a level of the material in the tank using the first and second distances. The method could further include calibrating the sensor unit to compensate for variations in a medium within the tank, where the sensor unit transmits wireless signals through the medium to determine the first distance. Determining the first distance could include using an ultrasonic measurement technique, and determining the second distance could include using a non-contact servo measurement technique.
摘要:
A voltage measurement system has a voltage measuring device connected to a device under test by a voltage divider to drop high voltages (e.g., peaking at or above 100 kilovolts) at a measurement point to lower levels for processing by a voltage measurement and wireless printed circuit board. The voltage measuring device communicates raw measurement data wirelessly (e.g., via Bluetooth®) to a remote device such as a mobile phone, laptop or portable meter head having a display and processing device programmed to calculate voltage measurements such has absolute average (ABS AVG), AC root mean square (RMS), +/−peak voltage, and AC or DC coupling. The remote device can wirelessly communicate with multiple voltage measuring devices to capture raw measurement data therefrom for voltage measurement applications with multiple measurement points (e.g., three-phase measurement, and transformer testing).
摘要:
A system and method for behavioral analysis of a household pet. The system includes a sensor unit having at least one 3D accelerator sensor attached to the pet, a control unit connected with the 3D accelerator sensor and configured to collect acceleration data indicative of selected movements from the sensor. The control unit being configured to perform an initial analysis of the collected sensor data. The system further includes an analysis unit communicating with the control unit, the analysis unit configured to upload the collected sensor data and to receive additional data pertaining at least to the household environment and to the pet's historical condition and to define the pet's condition accordingly by neutralizing the additional data effects, wherein the data collection rate from the sensor is selected in accordance with at least the initial analysis results.
摘要:
A utility meter includes: a meter body having a chamber through which material passes; a measuring unit contained within the chamber; and a register attached to the chamber. The register includes a register body and an electronics unit operatively connected to the measuring unit and positioned within the register body. The electronics unit coacts with the measuring unit to determine at least one of a volume of flow and a flow rate of a fluid traveling through the chamber. The register also includes a multiple resonance antenna operatively connected to the electronics unit and positioned within the register. The multiple resonance antenna is configured to resonate at at least a first frequency band and a second frequency band such that a signal representing at least one of the volume of flow and the flow rate is transmitted to a remote unit within the first frequency band when the utility meter is surrounded by a first medium and the signal representing at least one of the volume of flow and the flow rate is transmitted to the remote unit within the second frequency band when the utility meter is surrounded by a second medium.
摘要:
A communication system and a receiving device that ensure reducing a risk of performing pairing processing on an incorrect pair caused by presence of a large count of communication candidates are provided. The communication system 1 includes an extractor 55 to extract the communication candidates among a plurality of biological information measuring devices 10 by the receiving device 50. The extractor 55 compares radio field intensities of a plurality of pairing signals with a second threshold value larger than a first threshold value. The first threshold value specifies a lower limit of the radio field intensity at which a transmission of biological information is effectively achieved. The extractor 55 extracts the at least one biological information measuring device 10 transmitting the pairing signal at the radio field intensity exceeding the second threshold value as the communication candidate for this receiving device 50. According to an input operation by an operator, a selector 56 selects the one biological information measuring device 10 as a communication target among the communication candidates extracted by the extractor 55.