Abstract: Apparatus and associated methods may relate to a sensor controller configured to apply predetermined criteria to determine when a parameter value sampled by a sensor module meets the predetermined criteria, and in response to making such a determination, adjust a commanded data rate including an update time period. In an illustrative example, the predetermined criteria may be independently defined for each sensor in a network. In examples with a network of sensors, the sensor controller may dictate sensor module operation at differentiated data rates. In an illustrative example, a sensor controller may communicate with a series of pressure level sensor modules connected to a drilling apparatus in a mud logging application. Upon detection of a pressure level change that exceeds a critical condition as determined through comparison with the predetermined criteria, the sensor controller may increase or decrease a data rate of the respective sensor module, for example.

Abstract: A position sensor includes a rotor configured to be coupled to the rotatable element for rotation therewith, a non-rotationally mounted stator, a magnet non-rotationally disposed adjacent to the stator and spaced apart from the rotor, a first magnetic sensor non-rotationally mounted between the stator and the rotor, and a second magnetic sensor non-rotationally mounted between the stator and the rotor. The rotor is constructed at least partially of a magnetically permeable material and including a first rotor pole. The stator is spaced apart from the rotor and includes a first stator pole and a second stator pole, which are spaced radially apart from each other. The first magnetic sensor is disposed adjacent the first stator pole and radially offset from the second stator pole, and the second magnetic sensor is disposed adjacent the second main pole and radially offset from the first stator pole.

Abstract: A position sensor for sensing whether a rotatable element is in at least a first rotational position or a second rotational position is provided. A rotor is configured to be coupled to the rotatable element for rotation therewith, and is constructed at least partially of a magnetically permeable material and includes a first rotor pole. A stator is non-rotationally mounted, is constructed at least partially of a magnetically permeable material, is spaced apart from the rotor, and comprises a first main pole and a first stealer pole. The first main pole and the first stealer pole are spaced radially apart from each other. A magnet is non-rotationally disposed adjacent to the stator and is spaced apart from the rotor. A first magnetic sensor is non-rotationally mounted between the stator and the rotor, is disposed adjacent the first main pole, and is radially offset from the first stealer pole.

Abstract: Apparatus and associated methods may relate to a sensor controller configured to apply predetermined criteria to determine when a parameter value sampled by a sensor module meets the predetermined criteria, and in response to making such a determination, adjust a commanded data rate including an update time period. In an illustrative example, the predetermined criteria may be independently defined for each sensor in a network. In examples with a network of sensors, the sensor controller may dictate sensor module operation at differentiated data rates. In an illustrative example, a sensor controller may communicate with a series of pressure level sensor modules connected to a drilling apparatus in a mud logging application. Upon detection of a pressure level change that exceeds a critical condition as determined through comparison with the predetermined criteria, the sensor controller may increase or decrease a data rate of the respective sensor module, for example.

Abstract: This disclosure is directed to current sensing techniques for use within a magnetic current sensor. According to one aspect of the disclosure, a current sensing device includes a magnetic core, and a magnetic field sensor positioned substantially within a cavity formed by an air gap interface of the magnetic core and configured to sense a magnetic field induced by an electrical current that is conducted through a conductor passing through a central opening of the magnetic core.

Abstract: A quadrupole magnetic coded switch includes a switch housing, an actuator housing, a first pair of actuator dipole magnets, a first pair of switch dipole magnets, and a pair of first magneto-resistance (MR) sensors. The actuator housing is movable relative to the switch housing. The first pair of actuator dipole magnets is coupled to the actuator housing and is movable therewith, and the first pair of switch dipole magnets is coupled to the switch housing. The first pair of actuator dipole magnets and the first pair of switch dipole magnets are arranged to generate a first quadrupole magnetic field. Each of the first MR sensors is disposed within the switch housing and is configured to vary in resistance in response to relative movement of the actuator housing and the switch housing.

Abstract: A position sensor for sensing whether a rotatable element is in at least a first rotational position or a second rotational position is provided. A rotor is configured to be coupled to the rotatable element for rotation therewith, and is constructed at least partially of a magnetically permeable material and includes a first rotor pole. A stator is non-rotationally mounted, is constructed at least partially of a magnetically permeable material, is spaced apart from the rotor, and comprises a first main pole and a first stealer pole. The first main pole and the first stealer pole are spaced radially apart from each other. A magnet is non-rotationally disposed adjacent to the stator and is spaced apart from the rotor. A first magnetic sensor is non-rotationally mounted between the stator and the rotor, is disposed adjacent the first main pole, and is radially offset from the first stealer pole.

Abstract: A quadrupole magnetic coded switch includes a switch housing, an actuator, one or more switch dipole magnets, and a plurality of magnetically operated switch circuits. The actuator housing is movable relative to the switch housing. The plurality of actuator dipole magnets are coupled to the actuator housing and are movable therewith. The one or more switch dipole magnets are coupled to the switch housing. The one or more switch dipole magnets and the plurality of actuator dipole magnets are arranged to generate a quadrupole magnetic field. Each magnetically operated switch circuit is disposed within the switch housing and is configured to transition between a plurality of switch positions in response to relative movement of the actuator housing and the switch housing.

Abstract: This disclosure is directed to current sensing techniques for use within a magnetic current sensor. According to one aspect of the disclosure, a current sensing device includes a magnetic core, and a magnetic field sensor positioned substantially within a cavity formed by an air gap interface of the magnetic core and configured to sense a magnetic field induced by an electrical current that is conducted through a conductor passing through a central opening of the magnetic core.

Abstract: A quadrupole magnetic coded switch includes a switch housing, an actuator, one or more switch dipole magnets, and a plurality of magnetically operated switch circuits. The actuator housing is movable relative to the switch housing. The plurality of actuator dipole magnets are coupled to the actuator housing and are movable therewith. The one or more switch dipole magnets are coupled to the switch housing. The one or more switch dipole magnets and the plurality of actuator dipole magnets are arranged to generate a quadrupole magnetic field. Each magnetically operated switch circuit is disposed within the switch housing and is configured to transition between a plurality of switch positions in response to relative movement of the actuator housing and the switch housing.

Abstract: A redundant non-contact switch reports a status as closed or open for a first member and a second member that move relative to each other between an open state and a closed state. In some embodiments, the redundant non-contact switch includes a wireless authentication (WA) pair and a magnetic pair. The WA pair may include a WA responder attached to one of the first member and the second member, and a WA interrogator attached to the other of the first member and the second member. The WA pair may be configured to register a WA status of closed or open, depending on a WA authentication between the WA responder and the WA interrogator. The magnetic pair may include a magnet attached to one of the first member and the second member, and a magnet sensor attached to the other of the first member and the second member. The magnetic pair may be configured to register a magnetic status of closed or open, depending on whether a magnet distance between the magnet and magnet sensor is beyond a threshold magnet distance.