A magnetorheological braking device for setting operating states by way of rotational movements has an axle unit and a rotary body rotatable about the axle unit. The rotatability of the rotary body can be decelerated and/or blocked by a magnetorheological braking apparatus. A sensor apparatus has a magnetic ring unit and a magnetic field sensor for sensing a magnetic field of the magnetic ring unit. A shielding apparatus at least partially shields the sensor apparatus from a magnetic field of a coil unit of the braking apparatus. The shielding apparatus includes a shielding body surrounding the magnetic ring unit and a separating unit between the shielding body and the magnetic ring unit, and having a magnetic conductivity multiple times lower than the shielding body. A holding apparatus connects the shielding apparatus to the rotary body in an at least partially rotationally fixed manner.

The invention relates to a system for representing vibrations for a vehicle, comprising a vehicle seat with an upper part and a lower part, which are mounted movably relative to each other by means of a vibration device, wherein at least a first sensor, which is adapted to detect at least one first characteristic of a first acceleration of the upper part relative to the lower part, is arranged on the upper part, and wherein at least one second sensor, which is adapted to detect at least one second characteristic of a second acceleration of the lower part relative to a subsurface of the vehicle, is arranged on the lower part, wherein a display device is arranged with a first section and a second section, in each case exhibiting a complete division into at least two, preferably three segments, wherein the size ratios of the at least two segments to one another can be updated depending on a current value of the at least one first characteristic or the at least one second characteristic.

The present invention belongs to the technical fields of civil engineering, smart material and health monitoring, and provides a viscous damper fluid viscosity monitoring device and method based on piezoceramic transducers, comprising piezoceramic transducers, wires, corks, a baffle and a viscous damper. When the fluid viscosity of the viscous damper changes, the energy dissipation of pressure waves during propagation in a fluid will change, and signals received by the piezoceramic transducers will change, so that the viscosity of the fluid in the viscous damper can be calculated by the amplitude change of the signals received. The device of the present invention has a simple structure and accurate monitoring results, and provides a simple and feasible method for real-time monitoring of fluid viscosity of viscous dampers in engineering.

A wireless active suspension system with at least one wireless sensor coupled with at least one unsprung mass of a vehicle is disclosed. The system also includes at least one damper comprising an active valve, the damper being part of a vehicle suspension. The system additionally includes, at least one controller, the at least one controller in wireless communication with the at least one wireless sensor and the at least one damper, wherein the at least one controller receives the sensor data from the at least one wireless sensor and communicates an adjustment command to the active valve to modify a damping characteristic of the at least one damper.

A vibration damper for vehicles includes a damper tube which is at least partially filled with damper medium and which has a longitudinal axis along which a piston rod is movable back and forth. A working piston is movable jointly with the piston rod, by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space. The vibration damper has a leakage indicator for the damper medium.

A damper assembly has a longitudinal axis and includes a damper housing with a side wall portion and an end wall portion defining a damping chamber containing a quantity of damping fluid. A photon source and a photon receptor are operatively disposed in optical communication with the non-gaseous damping fluid in the damping chamber. The photon source is operable to direct a photon through the non-gaseous damping fluid toward an associated target surface. The photon receptor is operable to receive the photon reflected off the associated target surface through the non-gaseous damping fluid. A sensor suitable for such use as well as spring and damper assemblies and suspension systems are also included.

A shock absorber includes: a piston which is connected to an upper end of a rod by a fixing member and moves forward and backward in a cylinder; a conductor member which penetrates the piston from an upper end of an outer tube and extends into the rod; a coil which is provided in the rod so as to be capable of detecting a displacement of the conductor member with respect to the rod; an elastic body made of a resin material which is provided adjacent to the conductor member and on an outer side of an outer peripheral surface of the conductor member; and a support portion which supports an outer peripheral surface of the elastic body so as to restrict movement of the elastic body in a direction intersecting a center line of the conductor member.

A method for monitoring a shock strut may comprise measuring a first shock strut pressure, measuring an ambient temperature, measuring a shock strut stroke, measuring a second shock strut pressure, and determining a servicing condition of the shock strut based upon the first shock strut pressure, the ambient temperature, the shock strut stroke, and the second shock strut pressure, wherein the servicing condition indicates whether it is desirable for the shock strut to be serviced with at least one of a liquid and a gas. The first shock strut pressure and the shock strut stroke may be measured before the takeoff event with a weight of an aircraft supported by the shock strut.

A shock absorber for a vehicle suspension system may include a damper tube defining an axis, a rod operably coupled to the damper tube to be movable along the axis relative to the damper tube in response to jounce and rebound events, a dust boot operably coupled to the rod and extending along peripheral sides of the rod and at least a proximal end of the damper tube relative to the rod, the dust boot being movable with the rod, a target disposed on a damper bump cap operably coupled to the proximal end of the damper tube, and a measurement assembly affixed to the dust boot. The measurement assembly may include a PCB elongated parallel to the axis to track relative movement between the target and the measurement assembly responsive to the jounce and rebound events to generate ride height information based on the relative movement.

A shock absorber includes a gas spring cylinder containing a piston moveable between an extended position and a compressed position within the gas spring cylinder. A mechanical actuator is arranged whereby a bleed port is automatically closed when the gas spring is compressed to a predetermined position corresponding to a desired sag setting. In one embodiment, the position corresponds to a predetermined sag setting whereby the gas spring is partially compressed. In another embodiment, a proper sag setting is determined through the use of a processor and sensor that in one instance measure a position of shock absorber components to dictate a proper sag setting and in another instance calculate a pressure corresponding to a preferred sag setting.