Electricity meter

About: Electricity meter is a research topic. Over the lifetime, 7894 publications have been published within this topic receiving 42430 citations. The topic is also known as: electric meter & electrical meter.

DSP's based energy meter

Abstract: The new solutions on microcontrollers and DSP facilitates the transition from widely-used mechanical meters that yield limited data, to electronic meters that provide extensive information on customer energy usage. In the face of electric industry deregulation and the need for continuous improvement in customer service, the new electronic meters promise utility companies better access to information needed to establish more flexible customer rate plans and the parameters of power system also. One advantage of an electronic meter in nonlinear loads is its high metering accuracy; electronic measurements are more robust and accurate. The paper presents theoretical and experimental aspects related to the power meter design based on Motorola 56800 DSP family. The DSP56F80xfrom Motorola is a fully versatile part for a high performance, low cost, single chip electric energy meter with many additional features not found in other solutions. The on-chip ADC is capable of simultaneous dual sampling, allowing current and voltage to be sampled together in each phase. Energy computations consist mainly of multiplication and addition operations, easily be handled by this DSP. The high ADC sampling rate (up to two samples at 830KHz) contributes to high measuring accuracy, even in a nonlinear load.

S9 multi-module energy meter collecting terminal

Abstract: The invention relates to an S9 multi-module energy meter collecting terminal. The collecting terminal comprises a communication module, a central processing unit and a storage module. The communication module is used for collecting data of energy meters and sending the data to the central processing unit, and the central processing unit is used for processing on the received data and transmitting the data to the storage module to be stored. By means of the collecting terminal, on the premise that three-phase user energy meters are not replaced, the cost control function to three-phase users is maintained, meanwhile, remote information collection is realized quickly and the problem that remote data collection conflicts with cost control of the low-voltage three-phase energy meters is solved excellently.

Electricity meter data source identification circuit

Abstract: An electricity meter which, in one embodiment, includes a detection circuit, or unit, coupled to the meter microcomputer and supplies a detection signal to the microcomputer indicative of the data source is described. Using the signal supplied by the detection unit, the microcomputer can determine whether to allow access to metering data and other data stored in the meter. In an exemplary embodiment, the detection unit has three different modes, or states, of operation. These states of operation are sometimes referred to as the steady state, the optical port data transmit state, and the option board connector transmit state. The steady state refers to the condition of the unit when no data is being transmitted to the meter microcomputer from either optical port or the option board. In the steady state, the detection signal supplied to the microcomputer is high. In the optical port data transmit state, the detection signal transitions, as least momentarily, from a high state to a low state. In the option board connector transmit state, the detection signal remains in the high state even though data is being communicated to the microcomputer. The microcomputer, by detecting the state of the detection signal as well as the presence of data on the data supply line, can determine the source of the data. The microcomputer can the respond as appropriate.

Velocity production in elite BMX riders: a field based study using a SRM power meter

Abstract: Rylands L, Roberts SJ, Cheetham M, Baker A. Velocity Production in Elite BMX Riders: A Field Based Study Using a SRM Power Meter. JEPonline 2013;16(3):40-50. The aim of this study was to analyze the production of velocity in bicycle motocross (BMX) compared to other cycling disciplines. Six elite BMX riders, 5 males and 1 female who competed and trained regularly for a period of 12 yrs ± 2 agreed to take part in this study. Each rider performed 3, 50-m sprint tests and a single 200 m fatigue test. The riders’ peak power, fatigue index, power to weight ratio, and cycling revolution per minute were analyzed using a Schoberer Rad Messtechnik (SRM) BMX power meter. The BMX riders’ peak power and power to weight ratio were all found to be similar to those in other sprint cycling events. Peak power outputs of 1539 ± 148 W and 1030 W were recorded with mean power to weight ratios of 21.29 ± 0.84 W·kg and 16.65 W·kg. The BMX riders’ power fatigue index was found to be higher than other sprint events as riders fatigued at a greater rate. Mean fatigue index was 61.19 ± 5.97 W·sec for the male riders and 53.04 W·sec for the female rider. A notable finding of this study was the relationship of cycling cadence (rev·min), peak power (Watts) and velocity (mi·h). This relationship suggests once a BMX rider achieves peak power their pedaling cadence becomes the major contributory factor to velocity production.

Process for testing an electronic electricity meter

Abstract: An electronic electricity meter (1) has an optical interface (5, 6) used to test the load curve of the meter. When a test telegram is received from a testing device (7, 8, 9), the microcomputer (2) of the meter (1) switches loading meter pulses onto the optical interface (5, 6).