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.

Metering device and method for radio frequency testing system errors in mobile terminal production

Abstract: The invention discloses a metering device and method for radio frequency testing system errors in mobile terminal production, wherein the device comprises a single source, a power meter, a testing device and an output module, the method comprises the following steps: the signal source is used for sending upstream testing signals, the power meter is used for testing internal loss of the signal source according to the upstream testing signals, the testing device is used for testing the line loss of the upstream testing signals, the output module is used for outputting the difference value of the line loss of the upstream testing signals tested by the testing device and the internal loss of the signal resource tested by the power meter, wherein the difference value is taken as upstream chain line loss of a radio frequency testing system in the mobile terminal production. The meter device and method avoid hidden dangers brought by the self errors of a golden board of a golden machine, and adopt the stable signal resource and the power meter with higher accuracy to test the internal loss of the signal resource, so that the system errors are metered more accurately, and further the accuracy, stability and reliability of the radio frequency testing system in the mobile terminal production are improved.

Direct current energy meter test device, energy error test method and creeping calibration method

Abstract: The invention discloses a direct current energy meter test device and a method thereof, which belong to the technical field of direct current metering. The direct current energy meter test device comprises a program-controlled constant voltage power supply, a program-controlled constant current power supply, a voltage sensor, a current sensor, a data acquiring module, a control module, a communication module and a control host. After being connected with equipment, test time, voltage reference value, current reference value and test points of the direct current energy meter test device are set, an acquisition mode of data information of a to-be-tested direct current energy meter is selected, the control host controls the program-controlled constant voltage power supply and the program-controlled constant current power supply to output preset direct current voltage and current and computes reference energy according to digital information outputted by the data acquiring module, simultaneously, electric energy of the to-be-tested direct current electric meter is computed according to the selected acquisition mode, and electric energy error can be computed after the set test time is out. The invention is adaptable to test of direct current energy meters with different signal output modes and can achieve more accurate test results.

Optical port multiplexer for electric metering equipment

Abstract: A single optical port in an electric meter is multiplexed between at least two internal systems by using a multiplexer circuit which has a set of data lines which can be connected to the optical port and to one of the internal systems. The multiplexer is controlled by means of a magnetic reed switch which is mounted within the cover of the meter, so no mechanical changes to the meter cover are required.

Cellular Network Coverage Analysis and Optimization in Challenging Smart Grid Environments

Abstract: Smart grid services require reliable and efficient communication, which can be provided by modern cellular networks. However, smart grid components are often installed in environments that are challenging for radio networks, like energy meters in basements. While grid operators need to know the availability of cellular networks before installing components, current methods for evaluating mobile network coverage in such environment usually require lengthy tests or expensive and complicated measurement equipment. In this paper, we introduce the Mobile Network Analyzer (MNA), which is an easy to use device for fast coverage analyses and network quality assessment. It can be used by grid operators to check the network coverage before deploying smart grid components. We show the applicability of the MNA in an exemplary case study on the cellular network coverage at electricity meter cabinets at 168 locations and in a six month long-term field campaign in a wind farm. We determined that the communication availability can be improved by up to 29 % by leveraging the networks of multiple cellular network operators with the help of global SIM cards or national roaming. Additionally, we examined specific smart meter gateway installations, focusing on deep indoor coverage.

Peculiarities of current sensors used in contemporary electric energy metering devices

Abstract: An electricity meter is a tool that determines the amount of electricity transferred to the network by a producer and consumed by electrically powered loads. Metering devices are composed of sensitive sensors that simultaneously measure currents and voltages and a microprocessor, which calculates required values basing on the received data. This article gives an overview of the most common current sensors, which are used in contemporary electricity metering devices. Their principles, advantages and disadvantages are reviewed, conclusions about the external influences on the sensors, which can lead to the incorrect operation of a meter and wrong definition of consumed electricity, are made.