A method of sensing wheel rotation can include: sensing magnetic force information in an environment of a wheel by a magnetometer to obtain measured magnetic force information; generating relative magnetic force information by performing mathematical operation processing in accordance with the measured magnetic force information, where the relative magnetic force information does not change with geomagnetic field and does change with a rotation angle of a wheel; and obtaining angle information related to the rotation angle of the wheel in accordance with the relative magnetic force information.

A crank angle detection device for an engine capable of achieving downsizing and enhancing appearance of the engine is provided. A crank angle detection device for an engine that includes a pulsar ring including a plurality of detection portions and rotating coaxially with a crank shaft of the engine, and a sensor detecting a passage state of the detection portions. Here, the pulsar ring is fixed to a crank web of the crank shaft. A weight for adjusting inertia balance of the crank shaft is fixed to the crank web arranged close to an end of the crank shaft in an axial direction. The weight has a shape obtained by increasing thickness of a part of the pulsar ring.

A motor speed monitoring system can include a monitor channel having an input configured to connect to an inverter output of an inverter to receive motor command signals from the inverter, and an intelligence module configured to determine a motor speed based on the motor power signals from the inverter.

A rotary mechanism comprises a fastener and a tone wheel. The tone wheel comprises a first radial flange, a second radial flange, a first target, and a second target. The first and second targets mounted respectively to the first and second radial flanges to be sensed by a sensor. Each of the first radial flange and the second radial flange comprises a plurality of mounting points, the plurality of mounting points of the first radial flange and the second radial flange provided for adjustment of a diameter of the tone wheel. The fastener is provided to mount the first radial flange and the second radial flange to a shaft at a selected mounting point among the plurality of mounting points of each of the first radial flange and the second radial flange to set the diameter of the tone wheel. An associated method is disclosed.

A sensor for detecting relative movements between an encoder, having a substantially periodic scale and/or pattern, and at least one sensor element, wherein the sensor comprises at least one sensor element and a signal processing device, the signal processing device being designed to take the sensor element output signal of the sensor element as a basis for providing a movement signal, wherein the signal processing device is designed such that it has two or more switching thresholds for the at least one sensor element output signal, movement information that is taken into consideration for generating the movement signal being generated substantially whenever a switching threshold is exceeded and/or is fallen short of by the sensor element output signal, wherein the signal processing device is designed such that the appearance of movement information results in a particular movement impulse of defined duration being generated in the movement signal, wherein the signal processing device is designed to substantially rate and/or compute a relative velocity between the encoder and the sensor element by itself and the defined duration of the movement impulse is dependent on the circumstance of at least one first limit velocity for the relative velocity between the encoder and the sensor element being exceeded and/or being fallen short of. It is therefore possible for the signal processing device to identify for example whether the sensor is currently operating in a high-resolution mode. The pulse length may additionally also vary on the basis of further status information such as direction of rotation or gap size.

A sensor for detecting relative movements between an encoder, having a substantially periodic scale and/or pattern, and at least one sensor element, wherein the sensor comprises at least one sensor element and a signal processing device, the signal processing device being designed to take the sensor element output signal of the sensor element as a basis for providing a movement signal, wherein the signal processing device is designed such that it has two or more switching thresholds for the at least one sensor element output signal, movement information that is taken into consideration for generating the movement signal being generated substantially whenever a switching threshold is exceeded and/or is fallen short of by the sensor element output signal, wherein the signal processing device is designed such that the appearance of movement information results in a particular movement impulse of defined duration being generated in the movement signal, wherein the signal processing device is designed to substantially rate and/or compute a relative velocity between the encoder and the sensor element by itself and the defined duration of the movement impulse is dependent on the circumstance of at least one first limit velocity for the relative velocity between the encoder and the sensor element being exceeded and/or being fallen short of. It is therefore possible for the signal processing device to identify for example whether the sensor is currently operating in a high-resolution mode. The pulse length may additionally also vary on the basis of further status information such as direction of rotation or gap size.

In one aspect, a system for filtering signal interference from sensors signals includes a header comprising a frame and a powered component supported relative to the frame, and a sensor configured to detect electromagnetic waves indicative of a parameter associated with the header. In addition, the system includes an electronic control unit operably connected to the sensor such that the electronic control unit is configured to receive signals from the sensor associated with the detection of the electromagnetic waves. The electronic control unit is further configured to filter interference from the signals deriving from motion of the powered component relative to the sensor.

Sensor assemblies incorporating a temperature varying resistor provide information regarding the temperature of the operating environment for a sensor or protect the sensor from extreme temperatures. The assembly includes only two conductors—one transmitting current from a power source and another transmitting an output signal. In one embodiment, the assembly includes a sensor and a temperature varying resistor in parallel between the conductors with the output signal including information regarding a value of a variable measured by the sensor and information regarding a temperature of an operating environment for the sensor. In another embodiment, the sensor and temperature varying resistor are in series between the conductors with the output signal including information regarding a value of a variable measured by the sensor and the temperature varying resistor preventing delivery of current to the sensor when a temperature of the operating environment for the sensor meets a predetermined condition.

Sensor assemblies incorporating a temperature varying resistor provide information regarding the temperature of the operating environment for a sensor or protect the sensor from extreme temperatures. The assembly includes only two conductors—one transmitting current from a power source and another transmitting an output signal. In one embodiment, the assembly includes a sensor and a temperature varying resistor in parallel between the conductors with the output signal including information regarding a value of a variable measured by the sensor and information regarding a temperature of an operating environment for the sensor. In another embodiment, the sensor and temperature varying resistor are in series between the conductors with the output signal including information regarding a value of a variable measured by the sensor and the temperature varying resistor preventing delivery of current to the sensor when a temperature of the operating environment for the sensor meets a predetermined condition.

A sensor device for high speed rotating machine includes a rotating body and a sensor assembly. The rotating body includes a magnetic permeable ring and at least one positioning structure. The magnetic permeable ring includes a radial displacement sensing area and a rotational speed sensing area, and the positioning feature is arranged in the rotational speed sensing area. The sensor assembly includes four radial displacement sensors and two rotational speed sensors. The radial displacement sensor is a double-probe type sensor, and the speed sensor is a double-probe or four-probe type sensor. Through different types of the rotational speed sensors and the radial displacement sensors, the rotation speed and turning direction of the rotating body can be calculated.