Power collecting device, power measuring device, and power collecting method

A power collecting device being connected to a network and collecting, from an appliance connected to the network, measured data including a plurality of measured values indicating current power consumption of the appliance for each time measured by the appliance, said power collecting device comprising:

• a target appliance management unit configured to hold the number of connections as the number of the appliances connected to the network;
• a timer interval determination unit configured to determine, based on the number of connections, communication speed of the network, and network protocol specifications, a timer interval as a time interval at which the appliance transmits the measured data to said power collecting device;
• and
• a data transmission request unit configured to transmit to the appliance a request message requesting the appliance for transmitting the measured data at the timer interval.

A power measuring device measuring current power consumption of an appliance and transmitting, to a power collecting device connected to a network, measured data including at least one of the current power consumption and accumulated power consumption, said power collecting device comprising:

• a measurement unit configured to measure the current power consumption of the appliance for each time and outputting a measured value obtained through the measurement;
• a transmission request reception unit configured to receive a request message transmitted from said power collecting device, the message including a timer interval as a time interval at which said power measuring device transmits the measured data to said power collecting device;
• a band measurement unit configured to measure a communicable band usable for communication between said power measuring device and said power collecting device;
• a sampling interval determination unit configured to determine a sampling interval as an interval between measurement times of a plurality of measured values included in the measured data so that a data volume of the measured data defined by the sampling interval and the timer interval becomes equal to or smaller than a data volume that can be communicated within the timer interval by using the communicable band;
• and
• a measured data transmission unit configured to transmit, to said power collecting device at the timer interval, the measured data including the measured value obtained through the measurement at the sampling interval.

A power collecting method in a power collecting device being connected to a network and collecting, from an appliance connected to the network, measured data including one or a plurality of at least one kind of data of current power consumption and accumulated power consumption of the appliance, said power collecting method comprising:

• determining a polling interval as a time interval at which the measured data is collected from the appliance;
• measuring a communicable band usable for communication between said power collecting device and the appliance;
• determining a sampling interval as an interval between measurement times of a plurality of measured values included in the measured data so that a data volume of the measured data defined by the sampling interval and the polling interval becomes equal to or smaller than a data volume that can be communicated within the polling interval by using the communicable band;
• and
• transmitting, to the appliance at the polling interval, a request message requesting the appliance for transmitting the measured data including the measured value obtained through the measurement at the sampling interval.