Disclosed are systems, methods and devices for application of determining position information for mobile devices. In specific implementations, measurement of a signal travel time and a signal's strength may be combined to characterize a transmission power of the signal's transmitter. The characterized transmission power may be applied to affect expected signal strength signature values for use of the signal's transmitter may be updated in order to enhance a location based service where location may be effected by accuracy of a transmitter's power.

An estimating apparatus includes an acquiring unit, a history recording unit, and a determining unit. The acquiring unit acquires power amounts for respective measurement times from a measuring apparatus that measures power for each branch line, as a plurality of used power amounts. The history recording unit records the plurality of used power amounts in association with dates and times. The determining unit variably sets a comparison value for comparing magnitudes of the plurality of used power amounts recorded in the history recording unit, obtains a minimum value of the comparison value in a range satisfying a condition that an amount of time for which at least some of the plurality of used power amounts are continuously equal to or below the comparison value exceeds a prescribed sustained time, and estimates the minimum value to be a peak value of stand-by power of the branch line.

An estimating apparatus includes an acquiring unit, a history recording unit, and a determining unit. The acquiring unit acquires power amounts for respective measurement times from a measuring apparatus that measures power for each branch line, as a plurality of used power amounts. The history recording unit records the plurality of used power amounts in association with dates and times. The determining unit variably sets a comparison value for comparing magnitudes of the plurality of used power amounts recorded in the history recording unit, obtains a minimum value of the comparison value in a range satisfying a condition that an amount of time for which at least some of the plurality of used power amounts are continuously equal to or below the comparison value exceeds a prescribed sustained time, and estimates the minimum value to be a peak value of stand-by power of the branch line.

In an embodiment a sensor includes a sensor element, electrical leads connected to the sensor element, a housing having an opening, wherein the sensor element is arranged in the housing such that the electrical leads protrude through the opening, and a silicone resin filling the housing such that the sensor element and the electrical leads are fixed in the housing, wherein the silicone resin is a hard silicone material, and wherein the hard silicone material is more rigid than a soft silicone material.

In an embodiment a sensor includes a sensor element, electrical leads connected to the sensor element, a housing having an opening, wherein the sensor element is arranged in the housing such that the electrical leads protrude through the opening, and a silicone resin filling the housing such that the sensor element and the electrical leads are fixed in the housing, wherein the silicone resin is a hard silicone material, and wherein the hard silicone material is more rigid than a soft silicone material.

A system for checking metering accuracy of an EVSE unit includes an EVSE unit including a cable and a charge handle. The system includes an electric vehicle including a charging port configured to be coupled to the charge handle. The electric vehicle is configured to be charged by the EVSE unit using the cable and the charge handle. In place of the electric vehicle, an electric vehicle-emulating electric load can be used. The system includes an inline electric meter device having a terminal end and a distal end. The charging port of the electric vehicle is configured to be coupled to the terminal end of the inline electric meter device. The charge handle is configured to be coupled to the distal end of the inline electric meter device. The inline electric meter device may be connected in various configurations. The inline electric meter device includes a display, a microprocessor, test and diagnostic logic, a report generator, a camera, and/or a GPS receiver.

A system for checking metering accuracy of an EVSE unit includes an EVSE unit including a cable and a charge handle. The system includes an electric vehicle including a charging port configured to be coupled to the charge handle. The electric vehicle is configured to be charged by the EVSE unit using the cable and the charge handle. In place of the electric vehicle, an electric vehicle-emulating electric load can be used. The system includes an inline electric meter device having a terminal end and a distal end. The charging port of the electric vehicle is configured to be coupled to the terminal end of the inline electric meter device. The charge handle is configured to be coupled to the distal end of the inline electric meter device. The inline electric meter device may be connected in various configurations. The inline electric meter device includes a display, a microprocessor, test and diagnostic logic, a report generator, a camera, and/or a GPS receiver.

Provided is a prepayment-type watt-hour meter including: a code recognition that recognizes a code image in which information on prepayment of a charge-based amount of electric power that is to be consumed by a load is stored as coded, and that recognizes the information on the prepayment that is stored in the code image; and a control unit that measures an amount of electric power consumption by the load, and that calculates the electric bill for the measured amount of electric power, based on the information on the prepayment that is recognized by the code recognition unit.

Provided is a prepayment-type watt-hour meter including: a code recognition that recognizes a code image in which information on prepayment of a charge-based amount of electric power that is to be consumed by a load is stored as coded, and that recognizes the information on the prepayment that is stored in the code image; and a control unit that measures an amount of electric power consumption by the load, and that calculates the electric bill for the measured amount of electric power, based on the information on the prepayment that is recognized by the code recognition unit.

A system (100) for dynamically measuring at least one power metric in a local power circuit and providing the measured power metric to a personal controller (10). The system includes a primary shadow meter (300) with a power measurement module configured to measure a local power circuit and a plurality of ancillary shadow meters (500a, 500b, 500c) that each have a power measurement module configured to measure a single power circuit. The primary shadow meter and ancillary shadow meters may be connected over a wired network and/or wireless network.