Abstract: A system for estimating a position of a component of a fluid control device includes an optical fiber sensor having a section disposed at a fixed location relative to the fluid control device, the fluid control device configured to be disposed in a borehole in an earth formation and including a moveable member, the fixed location selected so that acoustic signals generated by fluid flowing through the fluid control device are receivable by the section of the optical fiber sensor. The system also includes an interrogation assembly configured to inject an optical signal into the optical fiber and receive a return signal, and a processing device configured to detect the return signal, identify a signal pattern based on the return signal, and estimate a position of the moveable member based on the identified signal pattern.

Abstract: A system for estimating a position of a component of a fluid control device includes an optical fiber sensor having a section disposed at a fixed location relative to the fluid control device, the fluid control device configured to be disposed in a borehole in an earth formation and including a moveable member, the fixed location selected so that acoustic signals generated by fluid flowing through the fluid control device are receivable by the section of the optical fiber sensor. The system also includes an interrogation assembly configured to inject an optical signal into the optical fiber and receive a return signal, and a processing device configured to detect the return signal, identify a signal pattern based on the return signal, and estimate a position of the moveable member based on the identified signal pattern.

Abstract: Provided is a digital radio receiver system and method for switching from receiving a first broadcast service to an alternative broadcast service. Also provided is a digital radio receiver system and method for scanning for broadcast services in a broadcast signal to generate an alternative broadcast service list for use in controlling the digital radio receiver system. A digital radio receiver utilizes spectrum awareness data, which includes data defining one or more frequencies at which broadcast services may be receivable, in order to faster selection of an alternative broadcast service from an alternative broadcast service list containing data relating to alternative broadcast services that are linked by a relationship to other broadcast services. By using the spectrum awareness data, only entries that are considered valid (i.e.

Abstract: Provided is a method of scanning for broadcast services in a broadcast signal to generate a broadcast service list for use with a digital radio receiver system, and the digital radio receiver system used for scanning for broadcast services to generate a broadcast service list. The system utilises spectrum awareness data, which includes data defining one or more frequencies at which broadcast services may be receivable, in order to reduce the number of frequencies to scan such that the overall scan time may be reduced. The data in the spectrum awareness data is a filtered subset of the plurality of frequencies at which the broadcast services may be received, which allows the controller of a digital radio receiver to tune a tuner to only the frequencies that are likely to contain a broadcast service when generating or updating a broadcast service list.

Abstract: Provided is a method of scanning for broadcast services in a broadcast signal to generate a broadcast service list for use with a digital radio receiver system, and the digital radio receiver system used for scanning for broadcast services to generate a broadcast service list. The system utilises spectrum awareness data, which includes data defining one or more frequencies at which broadcast services may be receivable, in order to reduce the number of frequencies to scan such that the overall scan time may be reduced. The data in the spectrum awareness data is a filtered subset of the plurality of frequencies at which the broadcast services may be received, which allows the controller of a digital radio receiver to tune a tuner to only the frequencies that are likely to contain a broadcast service when generating or updating a broadcast service list.

Abstract: Provided is a digital radio receiver system and method for switching from receiving a first broadcast service to an alternative broadcast service. Also provided is a digital radio receiver system and method for scanning for broadcast services in a broadcast signal to generate an alternative broadcast service list for use in controlling the digital radio receiver system. A digital radio receiver utilises spectrum awareness data, which includes data defining one or more frequencies at which broadcast services may be receivable, in order to faster selection of an alternative broadcast service from an alternative broadcast service list containing data relating to alternative broadcast services that are linked by a relationship to other broadcast services. By using the spectrum awareness data, only entries that are considered valid (i.e.

Abstract: A low pressure backseat sealing apparatus having a flexible sealing lip which contacts the backseat prior to contact between a stem shoulder and the backseat, with the stem shoulder positioned above the flexible lip, thereby limiting stem movement while allowing internal valve pressure to achieve a seal between the flexible lip and the bonnet.