The present invention includes a self-sounding theft prevention tag that issues one of two different sounds, that is, a first alarm or a second alarm in the event of theft, so that an abnormal state where a theft has occurred is detected with sound in a remote location without being interrupted by electromagnetic noise.

A system for fluid monitoring in a borehole for extracting hydrocarbons includes a casing to transport hydrocarbons, the casing defining an annulus between the casing and borehole wall. The system further includes a centralizer, coupled to the casing, to center the casing within the borehole. The system further includes a sensor unit, including a radio frequency identification (RFID) interrogator, positioned on the centralizer to monitor one or more fluids, including RFID tags, in the annulus.

A system for fluid monitoring in a borehole for extracting hydrocarbons includes a casing to transport hydrocarbons, the casing defining an annulus between the casing and borehole wall. The system further includes a centralizer, coupled to the casing, to center the casing within the borehole. The system further includes a sensor unit, including a radio frequency identification (RFID) interrogator, positioned on the centralizer to monitor one or more fluids, including RFID tags, in the annulus.

A magnetic tag sensor includes a cylinder and threaded pipe embedded therein and simulates a magnetic dipole; two threaded pipe wiring interfaces being connected to first and second cables, running through a cylinder upper cross-section outer wall and extending out of the cylinder; the cylinder is sleeved on a guide rail and at a junction between a riverbed and water; an guide rail end inserts into the riverbed, a water sealing box is mounted on a top of the guide rail, a power supply module, a relay and a load arranged inside the water sealing box, the first cable connected to a positive pole of the power supply module, and the second cable connected to a negative pole through the relay and load connected in series; and the threaded pipe in the wall of the cylinder moves up and down with the riverbed to generate a magnetic field signal.

A method for reading an identification tag is provided that includes detecting a content of particles having a first feature amount as a specific feature amount, where the particles are included in the identification tag; and distinguishing a type of the identification tag by information on the content of the particles having the first feature amount.

Use of traceable micro-electro-mechanical systems (“MEMS”) in subterranean formations. A method may comprise introducing a treatment fluid comprising a traceable micro-electro-mechanical system into a wellbore, wherein the traceable micro-electro-mechanical system comprises a micro-electro-mechanical system and a tagging material.

The present disclosure relates to a signal receiver and a detection system. The signal receiver includes a housing and a handle. The housing includes a body and a protrusion. The body includes a first face and a second face disposed opposite each other. The protrusion is connected to the body and protrudes relative to the first face along a direction away from the second face. The handle is arranged on the first face.

The present disclosure relates to a signal receiver and a detection system. The signal receiver includes a housing and a handle. The housing includes a body and a protrusion. The body includes a first face and a second face disposed opposite each other. The protrusion is connected to the body and protrudes relative to the first face along a direction away from the second face. The handle is arranged on the first face.

A medical supplies cabinet is disclosed. The cabinet comprises a housing presenting a medical supplies storage zone at where there is provided at least one medical supplies receptacle. The receptacle(s) is/are of a shape and configuration to be able to at least partly receive and hold at least one medical item. A sensor is associated with the receptacle(s). The sensor is configured to generate a signal indicative of the presence and/or absence, or removal of the medical item in/from the receptacle.

Techniques for operating a sensor are provided. An example method according to these techniques includes sensing, at the sensor, changes in intensity of a magnetic field of a magnet affixed to a monitored asset to produce sensor data, wherein the monitored asset is disposed in a non-metallic liquid or solid medium, and wherein the sensor is disposed outside of the non-metallic medium; The method also includes analyzing, at the sensor, the sensor data to produce feature information indicative of vibration of the monitored asset. The method also includes providing the feature information to a predictive algorithm to generate prognosis information indicating an occurrence of a known condition of the monitored asset.