초록 ▼

A method and apparatus are disclosed for sensing, sampling and performing calculations on a parameter of a physical quantity at a plurality of remote locations comprising a plurality of remote sensing units and at least one processing unit linked to said plurality of remote sensing units via a two w

A method and apparatus are disclosed for sensing, sampling and performing calculations on a parameter of a physical quantity at a plurality of remote locations comprising a plurality of remote sensing units and at least one processing unit linked to said plurality of remote sensing units via a two way communication link. Parameters of a physical quantity are sensed and sampled, calculations are performed and accumulated and transmitted, on demand, provided to the processing unit using a plurality of frequency bands one of which is identified as having valid data.

대표청구항 ▼

A remote sensing system comprising: a plurality of remote sensing digital meters comprising: means for sensing one or more parameters of a physical quantity as a measure thereof, means for taking a plurality of samples of a function of the parameters sensed by said sensing means, means for calculati

A remote sensing system comprising: a plurality of remote sensing digital meters comprising: means for sensing one or more parameters of a physical quantity as a measure thereof, means for taking a plurality of samples of a function of the parameters sensed by said sensing means, means for calculating from the samples taken by said sampling means one or more numerical values representative of said physical quantity, means for accumulating the magnitude of the numerical value or values calculated by said calculating means, means for providing the accumulated value to a remote location, and at least one processing unit linked to said plurality of remote sensing meters via AC power lines, said processing unit comprising: a central processing unit, means for storing accumulated values received from said remote sensing meters, and means for communicating with said remote sensing meters, said means comprising: means for transmitting identical signals to said remote sensing meters on a plurality of spaced apart frequency bands and means for receiving signals from said remote sensing meters on one of said frequency bands.