| 摘要 |
<p>Communicating relative to a subterranean well includes encoding information in an amplitude and a duration for a pulse. A detectable change in response to both the amplitude and duration communicates the information. Two distinct items of information can be encoded wherein the information encoded in the amplitude is distinct from the information encoded in the duration. A single, more highly resolved, item of information can be defined in that the amplitude and the duration can together represent one aspect of the information to be communicated. Particular application is found in a subterranean well having three-phase power conductors connected to a three-phase motor in the well with the amplitude and duration being communicated through the power conductors. A system for communicating in a subterranean well includes an information source, to provide a signal representing a numerical value to be communicated in a subterranean well; it also includes an encoder, connected to the information source, to encode the numerical value into an amplitude and a duration for an analog pulse wherein the amplitude and duration together define the numerical value.</p> |
