摘要:
An electromechanical motor includes a rail to be moved, a dry, non-lubricated, sliding bearing for the rail, and driving members imposing a mechanical driving force on the rail. The bearing has two rail contacting portions. A first portion contacts the rail for obstructing displacements of the rail in a first direction transverse to a main extension of the rail. The first portion also obstructs rotation of the rail around an axis parallel to the main extension. The second portion is arranged for obstructing displacements of the rail in the first direction transverse to the main extension, while allowing at least a minor movement of at least one of rotation of the rail. The motor allows for mechanical flexibility at certain selected positions and ensures immobility at other selected positions, in order to reduce the impact of externally induced displacements, torques and rotations at critical places in the motor.
摘要:
An electromechanical motor (1), using at least two bimorph, monomorph or multimorph electromechanical actuating elements (6) interconnected by a common actuator backbone (5) is disclosed. The actuating elements (6) are controllable in both a longitudinal direction (L), i.e. in the main extension direction of the actuating element (6), and a flexural direction, i.e. bending of the actuating element (6), separately. The different actuating elements (6) can be controlled individually as well. The actuator (3) dimensions are preferably selected to resonance frequencies in vicinity of a certain frequency. The actuating elements (6) are provided with interaction portions (7) at which any contact between the actuator and a body (2) to be moved is made. In order to operate well both in fine-positioning and resonant motion, the interaction portions (7) are arranged to partially suppress the transfer of acoustic waves between the actuating elements (6) and the body (2) to be moved.
摘要:
A digital camera is constructed with multiple lenses mounted in a pair of tubular elements which are nested together for relative axial movement. Movement is provided by piezoelectric actuators mounted externally to a support tube on flexible printed circuit board elements. Each lens tube is provided with a drive rail which extends at least partially over the length of the lens tube and projects radially outward from the periphery of each of the tubes. The rails are accessible to the engagement pads of the piezoelectric actuators to allow the transmission of drive forces to each of the tubes.
摘要:
The present invention combines bending mode mechanical (frm) and electrical (fre) resonances, whereby a relatively good efficiency can be achieved within a relatively broad frequency range (Δf3). An electrical resonance (frc) or mechanical resonance is designed to be situated in the same order of magnitude as another mechanical resonance (frm), but separated therefrom. Preferably, the separation (Δf2) is smaller than 2f1/Q1, where f1 is the resonance frequency for the resonance having lowest quality value, and Q1 is the corresponding quality value of the mechanical resonance. An electromechanical motor comprising a driving element and electrical resonance circuit according to the above ideas may comprise a double bimorph driving element having one single actuating point influencing a body to be moved. The double bimorph driving element is excited in bending vibrations perpendicular to a main displacement direction, whereby both tangential and perpendicular motions are created by bending mode vibrations.
摘要:
Management information is determined for both non-drifting and drifting mobile radios being serviced by a cell and/or by an RNC and reported to a management system for further processing. A distribution of drifting mobile radios to non-drifting mobile radios in a particular cell (or for all cells controlled by another RNC) is determined using the number of established radio links in the cell (or cells) for both drifting and non-drifting mobile radios. The distribution along with management information detected for non-drifting mobile radios are used to estimate corresponding management information for drifting mobile radios. In this way, management information for both drifting and non-drifting mobile radios is reported to the management system using existing formats, protocols, and procedures in both the traffic and management systems.
摘要:
In an electromechanical motor, elongated electromechanical drive elements are mechanically and preferably also electrically attached to a carrier. A spring is arranged to apply a force on the electromechanical drive element by pressing the backside of the carrier at a pivot point. The carrier is allowed to pivot around the pivot point around an axis parallel to a the element elongation. The electromechanical drive element is thereby suspended in a floating manner. The electromechanical drive elements are arranged to present a bending motion having strokes perpendicular to the elongation. The pivot point, the mechanical joint between the carrier and the electromechanical drive element, and preferably also a nodal point of bending motions of the electromechanical element are situated at a common plane perpendicular to the element elongation. In one embodiment, the electromechanical drive element is provided with metallizations to which the carrier is soldered.
摘要:
A peristaltic actuating element (30) is arranged against a body (20). The peristaltic actuating element (30) comprises volumes (34A-G) of electromechanical material and is arranged for selectively causing a dimension change in a main motion direction (90) of the peristaltic actuating element (30) within a limited peristaltic section (40). By changing voltage signals activating the volumes (34A-G), the peristaltic section (40) is caused to move along the peristaltic actuating element (30). The body (20) interacting with the peristaltic actuating element is thereby displaced relative to the peristaltic actuating element (30). Preferably, the length of the peristaltic section (40) is less than half the length of the entire peristaltic actuating element (30), more preferably much less. It is also preferred, if the peristaltic actuating element (30) is arranged so that the surface (32) interacting with the body (20) is removed therefrom within the peristaltic section (40).
摘要:
The present invention uses the resilient behaviour of a flexible printed circuit board (10), both to mechanically clamp the components (20) in a permanent manner and to achieve good electrical contacts (24) between conducting parts (12) of the flexible circuit board (10) and the components (20). By cutting the flexible printed circuit board in such a manner that small tab-like, resilient members (12,16) are formed, the forces caused by elastically deformed resilient members (12,16) are usable both for mechanically fixing the components (20) and for causing an electrical contact (24). By choosing appropriate sizes of the resilient members (12,16), the relative strength of the spring force is increased, which even will be large enough to cause a plastic deformation of the material in the contact points (24) between the conducting resilient members (12) and the component contact members (22). In such a manner, soldering or gluing may be totally omitted.
摘要:
Method in a network node (110) comprised in a wireless communication system (100), for adjusting size of a cell (115) served by the network node (110). The method comprises estimating (304) a parameter value, related to a number of unsuccessful network connection attempts made by one or more user equipment (120) during a measurement period, and/or a number of dropped user equipment connections to the network node (110) during the measurement period. Further, the method comprises comparing (305) the estimated (304) parameter value with a threshold value, and adjusting (306) the size of the cell (115), based on the result of the comparison (305) of the estimated (304) parameter value with the threshold value.