A sensor arrangement comprising an angle sensor for measuring torsion is disclosed. The angle sensor is designed for carrying out a measurement via n poles, where n1, and primarily comprises a sensor ring which at least partially surrounds a rotational axis, and a material measure which is rotatable relative to this sensor ring. One transmitting coil and multiple receiver coils are situated on the sensor ring. A magnetic circuit is formed between the transmitting coil and the receiver coils, which magnetic circuit comprises the material measure and a pot core including two limbs. In this case, the material measure forms a variable reluctance in the magnetic circuit. At least one of the two limbs of the pot core is segmented in such a way that the limb comprises ring segments. Each of the receiver coils surrounds at least one of the ring segments. Each of the ring segments forms a circular arc having a mean radius. The ring segments may be provided in pairs. The mean radii of the two ring segments of the individual pairs have an angle () relative to each other of (60/n+i.Math.360/n), wherein i is a whole number. The disclosure further relates to a rolling bearing arrangement.

A rolling element bearing having a first ring element, a second ring element (3), a plurality of rolling elements arranged in a space between the first and the second ring elements such that the first and the second ring elements can rotate relative each other around a rotational axle. The bearing further includes a sealing ring for sealing off a circumferential opening of the space between the first and the second ring element. The sealing ring is connected to the first ring element and further arranged to rotate relative the second ring element of the rolling element bearing. The sealing ring provides a power generating system that provides at least one pick-up element arranged to generate electrical power when the rolling element bearing rotates. The power generating system is located completely within the circumferential opening of the space.

Methods and devices are described, such as for chest compression depth measurement for CPR performed on infants and for allowing active decompression of a patient's chest during a release phase of a chest compression cycle. An anterior segment of a resilient wrap-around structure may be positioned on the patient's sternum, including a first motion sensor. A posterior segment of the resilient wrap-around structure may be positioned on the patient's back, including a second motion sensor. Chest compressions may be provided such that the first motion sensor moves in fixed relation with the patient's sternum and the second sensor moves in fixed relation with the patient's back. Active decompression may be allowed for, including the resilient wrap-around structure exerting an expansive force on the patient's chest wall during a release phase of a chest compression cycle and hastening expansion of the patient's chest during the release phase.

Methods and devices are described, such as for chest compression depth measurement for CPR performed on infants and for allowing active decompression of a patient's chest during a release phase of a chest compression cycle. An anterior segment of a resilient wrap-around structure may be positioned on the patient's sternum, including a first motion sensor. A posterior segment of the resilient wrap-around structure may be positioned on the patient's back, including a second motion sensor. Chest compressions may be provided such that the first motion sensor moves in fixed relation with the patient's sternum and the second sensor moves in fixed relation with the patient's back. Active decompression may be allowed for, including the resilient wrap-around structure exerting an expansive force on the patient's chest wall during a release phase of a chest compression cycle and hastening expansion of the patient's chest during the release phase.

If a controller determines the calculation of a measured vehicle body velocity is possible, the controller calculates the measured vehicle body velocity as an estimated vehicle body velocity to conduct update processing for a K table and an AB table. If the controller determines the calculation of the measured vehicle body velocity is impossible, the controller extracts a conversion coefficient from the K table based on a detected running state while extracting a sensitivity coefficient and an offset coefficient from the AB table based on the temperature by a temperature sensor. The vehicle mounted apparatus calculates an axle pulse-based vehicle body velocity from the extracted conversion coefficient while calculating an acceleration-based vehicle body velocity from the extracted sensitivity coefficient and offset coefficient. The vehicle mounted apparatus calculates the estimated vehicle body velocity by weighting the calculation values of the axle pulse-based vehicle body velocity and the acceleration-based vehicle body velocity.

A method and system for determining a speed of a vehicle based on a GPS speed captured from a Global Positioning System (GPS). A capturing module captures GPS speed V.sub.x and a horizontal accuracy value corresponding to a time stamp T.sub.x. A speed modification module modifies the GPS speed V.sub.x corresponding to the time stamp T.sub.x. A speed correcting module corrects the GPS speed V.sub.x corresponding to the time stamp T.sub.x. The GPS speed may be corrected by filtering an error in the GPS speed by using a Slope dependent averaging (SDA) filter in order to obtain a first corrected speed V.sub.x. Further, the first corrected speed is corrected by selecting one of a center weight (CW) filter and an edge weight (EW) filter, based upon a pre-defined condition, in order to obtain a second corrected speed V.sub.x indicating the speed of the vehicle.

A method and system for determining a speed of a vehicle based on a GPS speed captured from a Global Positioning System (GPS). A capturing module captures GPS speed V.sub.x and a horizontal accuracy value corresponding to a time stamp T.sub.x. A speed modification module modifies the GPS speed V.sub.x corresponding to the time stamp T.sub.x. A speed correcting module corrects the GPS speed V.sub.x corresponding to the time stamp T.sub.x. The GPS speed may be corrected by filtering an error in the GPS speed by using a Slope dependent averaging (SDA) filter in order to obtain a first corrected speed V.sub.x. Further, the first corrected speed is corrected by selecting one of a center weight (CW) filter and an edge weight (EW) filter, based upon a pre-defined condition, in order to obtain a second corrected speed V.sub.x indicating the speed of the vehicle.

In the present invention: a power consumption calculation unit sets target speeds in a plurality of sections of a track; the power consumption calculation unit calculates, on the basis of the target speeds, the power consumption when the track is traveled; a target speed change unit changes combinations of target speeds in the plurality of sections set by the power consumption calculation unit; an evaluation value calculation unit calculates an evaluation value on the basis of an evaluation function for each combination of target speeds; the evaluation function is a function in which the power consumption calculated by the power consumption calculation unit is multiplied by a prescribed weight; and a target speed determination unit sets the combination of target speeds in which the evaluation value is smallest as the target speed of the vehicle in each section.

In the present invention: a power consumption calculation unit sets target speeds in a plurality of sections of a track; the power consumption calculation unit calculates, on the basis of the target speeds, the power consumption when the track is traveled; a target speed change unit changes combinations of target speeds in the plurality of sections set by the power consumption calculation unit; an evaluation value calculation unit calculates an evaluation value on the basis of an evaluation function for each combination of target speeds; the evaluation function is a function in which the power consumption calculated by the power consumption calculation unit is multiplied by a prescribed weight; and a target speed determination unit sets the combination of target speeds in which the evaluation value is smallest as the target speed of the vehicle in each section.

Improved bearing roller elements are disclosed. A first disclosed improvement is the addition of vanes to a ring-roller type element which allows fluids (such as liquids or gases) to flow through the bearing assembly. The fluids can then provide convection cooling. With proper configuration, the use of such vaned ring-roller elements can even allow the creation of a pump, either as part of the larger apparatus' cooling system or as a dedicated device. A second disclosed improvement, which can be used in combination with the first or in isolation, is the use of magnetic spokes in ring-roller type elements which allows them to be driven by an electromagnetic field. The use of such magnetic elements in the bearing roller elements also allows electromagnetic braking and/or regenerative braking.

A bearing assembly incorporating the roller elements in a ring configuration and using pre-load to produce additional benefits is also disclosed.