A movable member coupled to a displacement detector via a void is disposed with respect to a fixed member to which a coil is fixed. By disposing the coil in a closed loop magnetic circuit including a permanent magnet, the movable-side member, and the fixed member, a Lorentz force for moving the movable-side member in the axial direction is generated.

A movable member coupled to a displacement detector via a void is disposed with respect to a fixed member to which a coil is fixed. By disposing the coil in a closed loop magnetic circuit including a permanent magnet, the movable-side member, and the fixed member, a Lorentz force for moving the movable-side member in the axial direction is generated.

Joint analysis system for analyzing kinematics of an anatomical including a sensor device, a storage device, a magnet, and an analysis engine. The sensor device can be configured to be disposed on a first side of the joint and can have one or more sensors, a processor coupled to the one or more sensors, a wireless data transmitter coupled to the processor, a data storage device coupled to the processor, and a battery coupled to the sensors, processor, wireless data transmitter, and data storage device. The magnet can be configured to be disposed on the second side of the joint. The analysis engine can be configured to receive data from the sensors.

Joint analysis system for analyzing kinematics of an anatomical including a sensor device, a storage device, a magnet, and an analysis engine. The sensor device can be configured to be disposed on a first side of the joint and can have one or more sensors, a processor coupled to the one or more sensors, a wireless data transmitter coupled to the processor, a data storage device coupled to the processor, and a battery coupled to the sensors, processor, wireless data transmitter, and data storage device. The magnet can be configured to be disposed on the second side of the joint. The analysis engine can be configured to receive data from the sensors.

An inertial sensor includes a base portion, a weight portion, a connection portion, and a first sensing element unit. The connection portion connects the weight portion and the base portion and is capable of being deformed in accordance with a change in relative position of the weight portion with respect to the position of the base portion. The first sensing element unit is provided on a first portion of the connection portion and includes a first magnetic layer, a second magnetic layer, and a nonmagnetic first intermediate layer. The nonmagnetic first intermediate layer is provided between the first magnetic layer and the second magnetic layer.

An inertial sensor includes a base portion, a weight portion, a connection portion, and a first sensing element unit. The connection portion connects the weight portion and the base portion and is capable of being deformed in accordance with a change in relative position of the weight portion with respect to the position of the base portion. The first sensing element unit is provided on a first portion of the connection portion and includes a first magnetic layer, a second magnetic layer, and a nonmagnetic first intermediate layer. The nonmagnetic first intermediate layer is provided between the first magnetic layer and the second magnetic layer.

In one of aspects, a mobile electronic device that is configured to determine transportation thereof comprises at least one controller that is configured to, while a predetermined vibration is being detected, determine that the transportation is a train when a predetermined change in magnetic field strength is detected within a predetermined period of time. On the other hand, the at least one controller is configured to determine that the transportation is an automobile when the predetermined change in the magnetic field strength is not detected within the predetermined period of time. The at least one controller is further configured to determine that, when predetermined information regarding rotation of the mobile electronic device is detected, the transportation is an automobile even when the predetermined change in the magnetic field strength has been detected within the predetermined period of time.

In one of aspects, a mobile electronic device that is configured to determine transportation thereof comprises at least one controller that is configured to, while a predetermined vibration is being detected, determine that the transportation is a train when a predetermined change in magnetic field strength is detected within a predetermined period of time. On the other hand, the at least one controller is configured to determine that the transportation is an automobile when the predetermined change in the magnetic field strength is not detected within the predetermined period of time. The at least one controller is further configured to determine that, when predetermined information regarding rotation of the mobile electronic device is detected, the transportation is an automobile even when the predetermined change in the magnetic field strength has been detected within the predetermined period of time.

A trailer braking system having a surge component used in combination with an electric over hydraulic brake system. The surge component includes a sliding member with a magnetic sensor for detecting trailer deceleration, the sliding member providing an initial pressurization of the hydraulic system. A trailer mounted electrical circuit detects when the tow vehicle brakes are applied and includes a microcontroller for detecting the speed of deceleration provided by the magnetic sensor. A trailer mounted electric motor receives a signal from the circuit board to vary pressure to the brakes in accordance with the speed of deceleration.

A trailer braking system having a surge component used in combination with an electric over hydraulic brake system. The surge component includes a sliding member with a magnetic sensor for detecting trailer deceleration, the sliding member providing an initial pressurization of the hydraulic system. A trailer mounted electrical circuit detects when the tow vehicle brakes are applied and includes a microcontroller for detecting the speed of deceleration provided by the magnetic sensor. A trailer mounted electric motor receives a signal from the circuit board to vary pressure to the brakes in accordance with the speed of deceleration.