38results about How to "Vibration insensitive" patented technology

A sensor unit for measuring a measurement variable in a medium, in particular in an aggressive liquid or gaseous medium, comprises a sensor that is arranged in a sensor capsule and has a sensor region that is arranged on a base body. In order to detect the measurement variable in the sensor region, a measurement opening is provided in the sensor capsule. On a side facing the measurement opening, the sensor region has a measurement surface that is provided with measurement electronics. An electrical supply line is provided on the sensor for the purpose of transmitting a sensor signal that is generated by the measurement electronics. A plated-through hole is provided in the base body. The plated-through hole is used to connect the measurement electronics to the electrical supply line via signals through the base body, on a base side of the sensor that faces away from the measurement opening.

The invention discloses a method for manufacturing a near infrared waveband three-dimensional photonic crystal, wherein an one-dimensional crystal mask is formed by utilization of holographic interference, and is transferred onto a SiO2 layer on a silicon substrate material through ion beam etching or reactive ion beam etching; high refractive index materials are filled into an etched groove; the surface is polished by the ion beam etching method, and then SiO2 is deposited; a second layer is formed after coating of photoresist, holographic photoetching, ion beam etching and so on; the steps are repeated, and layers are aligned by the Moire fringe technique; and finally the SiO2 is removed by the acid washing method, and the three-dimensional photonic crystal required is obtained. The method fully utilizes the submicron resolution of holographic photoetching, can manufacture the large-area three-dimensional photonic crystal which can then be cut into small blocks as required, has the advantages of high efficiency and low cost, and simultaneously is convenient to overcome the defects of introduction of large area and periodicity by changing wave fronts of two beams of coherent light in an interference field.

Apparatus and method for measuring displacements of a rotary or linearly-displaceable member by counting periods of displacement thereof along a predetermined displacement path, including a pulse generator located at a pulse-generation station proximate to the displacement path; and an electrical circuit controlled by the pulse generator to actuate a first sensor to sense the status of the displaceable member at the particular instant one of said second machine-sensible elements passes through the pulse-generation station, and to increment a counter in accordance with said status determination. In the described preferred embodiments, the second machine-sensible elements are magnetic elements; and the pulse generator includes a coil, a magnetic core magnetically coupled to the coil, and a spring-mounting for the magnetic core causing the core to move from an initial position in one direction with respect to the coil when aligned with one of the second machine-sensible elements, and to be returned in the opposite direction by the spring to its initial position, whereby the coil generates pulses during such movements of the magnetic core.

An electrical switch system (10) for use with a motor vehicle transmission has a movable contact assembly (16) mounted on an insulative base member (14) in turn mounted on a detent lever (22). The detent lever (22) is mounted on a manual shaft (20) for pivotal movement therewith while a housing is rotatably mounted on the manual shaft facing the detent lever. A plurality of side-by-side arcuate contact strips are insert molded in the housing wall with contact segments (1–6) exposed on a wall facing the movable contact assembly. The housing is maintained in one fixed angular position while movable contacts sweep across the contact segments upon pivotal motion of the manual shaft. A control gap is provided by ledges (12k) formed in the housing with a lip (14b) of the insulative base member (14) mounting the movable contact assembly received in the control gap to ensure that appropriate contact engagement between the movable contact assembly and control segments is maintained. In a modified embodiment an additional lip (14b′) and corresponding housing ledge (12k′) is provided at an opposite side of the insulative base member.

A safety system for an industrial press having a moveable section (30), the safety means including: a laser emitting means (1) for emitting a continuous planar laser beam (9) having a generally constant lateral width; a light receiving means (22) for receiving the laser beam and for detecting when an object intersects the laser beam; and a control means for stopping or preventing movement of the moveable section of the press when the receiving means detects that the laser beam has intersected an object.

The transport carriage (1) for the accommodation of a needle board (2) comprises a console (21) that is preferably supported so as to be pivotable about a rotational axis (22). Clamping jaws (24, 25) are provided on the console (21), with the clamping jaws clamping the needle board (2)—preferably in a force-limited manner—between each other and thus holding said needle board in a frictionally engaged manner.

An electropneumatic proportional flow control device improves electropneumatic control of pneumatically operated valves. Improved turn down ratios in regards to the electromagnetic response of the device to a supplied control voltage is achieved using two variable spring devices, one linear, as part of the pressure regulator valve component, and the other non-linear, as part of the proportional valve component and which are magnetically responsive to different magnetic forces. The use of both the linear and non-linear springs together results in an increased turndown-ratio, especially during initial valve control.

An electrical hand-held power tool includes a non-contacting electrical manual control switch (3) having an operating element (4) and a sensor switch (5), a pivotable carrier (6) which carries a switching element (13) and which is manually controlled by the operating element (4) of the manually control switch (3), the sensor switch (5) being connected with the carrier (6) vibration-free, and pivot transmitting device (7) axially displaceable along the vibration axis A) of a vibrating assembly (2) of the power tool relative to the operating element (4) for pivoting the carrier (6) in response to actuation of the operating element (4).

An electropneumatic proportional flow control device improves flow control because it incorporates two internal valves in parallel: a first electronically controlled, miniature proportional valve manipulated in parallel with a second and larger pilot -operated valve. The miniature valve allows for precision control of the low-end of the full scale output; the larger mechanical valve allows for the high-end of the full scale output. These valves are encompassed within a valve assembly comprising a valve manifold, a pilot-operated diaphragm, electronic control circuitry, and a flow restrictor.

The embodiments herein relate to a method for deriving topography of an object surface (3). A linearly polarized light wave (102a, 103a) is directed towards the object surface (3) and a reference surface (2). Images of reflected linearly polarized light wave (102b, 103b) for a plurality of wavelengths are obtained. The images are obtained for at least four polarizations for each of the plurality of wavelengths. The reflected linearly polarized light wave (102b, 103b) is a reflection of the linearly polarized light wave (102a, 103a) directed towards the object surface (3) and the reference surface (2). The topography of the object surface (3) based on the obtained images is obtained.

A system for structural analysis of an object, including a device for generating an input light beam arranged so as to cause the input beam generated to interact with at least one portion of the object, and a device for receiving the output light beam resulting from the interaction between the input beam and the object. In this system, the receiving device include a wavefront analyzer arranged so as to measure the electromagnetic field of the wave of the output beam received, and the generating device has a spatial coherence adapted to that of the receiving device. A structural analysis method implementing such a system is presented.

The invention relates to a module, which can be inserted into a housing of an industrial plug-in connector (5), wherein at least one optical fibre plug-in connector (2) can be inserted in the module (1), wherein at least one adapter (3) can be inserted in the module (1) and is connected to the optical fibre plug-in connector (2), wherein the adapter (3) contains an optical imaging element (11). In the plugged-in state, the optical elements (11, 11), for example the aforementioned spherical lenses, of two modules (1) are aligned towards each other such that the light signal that emerges from the optical element (11) of the module of the first industrial plug-in connector (5) couples into the optical element (11) of the module (1) of the second industrial plug-in connector (5).

The invention belongs to the technical field of laser interferometers, and provides a laser dynamic interferometer. The laser dynamic interferometer comprises a laser, a collimation structure for collimating a laser beam emitted by the laser, a plane mirror, a plane mirror, a 1/4 wave plate, a 1/4 wave plate, a polarization beam splitter and the like. A crossed micro-polarizer array capable of changing directions freely is adopted and used for generating phase shift at the same time, a mode of combining a liquid crystal phase delayer and a traditional interferometer is adopted, different interference phases can be obtained in cooperation with different polarizer arrays, and therefore, switching measurement is achieved on the basis of original laser interferometer measurement. A polarized light interference principle is adopted, and time domain phase shift of a traditional phase shift interferometer is converted into space domain phase shift, so that full-resolution measurement can be achieved in one CCD frame frequency. According to the invention, the advantages of rapid measurement, insensitivity to vibration, reduction of the influence of airflow and the like which are not possessed by a traditional interferometer are achieved.