286results about How to "Continuous regulation" patented technology

The present invention provides a dynamic stabilization device positionable about a portion of a spinal column. The stabilization device may generally include a first component and a second component, where the first and second components are movably coupled to one another to define an arcuate path of motion. The stabilization device may also include one or more adjustment elements positionable within first and second adjustment openings to affect the path of motion between the first and second components and/or the behavior and characteristics of the movement. In addition, one or more resistive elements may be adjustably positionable within either and/or both of the first and second adjustment openings to provide resistance and/or dampening of the forces experienced as the first and second components move relative to one another. The stabilization device may further define a joint having three degrees of freedom to adapt to movement of a spinal column.

The present invention relates to a method with which speech is captured in a noisy environment with as high a speech quality as possible. To this end, a compact array of, for example, two single microphones is combined to form one system through signal processing methods consisting of adaptive beam formation and spectral subtraction. Through the combination with a spectral subtraction, the reference signal of the beam former is freed from speech signal components to the extent that a reference signal of the interference is formed and the beam former produces high gains.

In order to provide an electric heat system that is quieter than those of the prior art, a switching circuit is incorporated into the controls for the heating system which provides for the heating elements of the electric heater to be kept at a more constant temperature than those of the prior art. The switching circuit regulates the output power to the degree desired while not inducing sharp changes in temperature of the coils of the electric heater and thus reduces the degree of rapid expansion and contraction of the coils and the enclosure for the heater. This in turn reduces the amount of mechanical noise produced by the electric heater while also reducing wear and tear on the heating element, the heater enclosure and objects near to the heater.

The present invention discloses a switchable two-stage and cascade marine energy-saving ultralow-temperature refrigeration system which comprises a high-temperature level refrigeration system, a low-temperature level refrigeration system, a hot fluorine defrosting system of a high-temperature level air cooler and a hot fluorine defrosting system of a low-temperature level air cooler. The hot fluorine defrosting system of the high-temperature level air cooler comprises a high-temperature level compressor of which the outlet is divided into two paths through a first oil separator; and the second path is connected with an air suction port of the high-temperature level compressor through a first solenoid valve, the high-temperature level air cooler, a third solenoid valve, a first pressure relief valve, a first gas-liquid separator, a first one-way valve and a first heat regenerator. The hot fluorine defrosting system of the low-temperature level air cooler comprises a low-temperature level compressor of which the outlet is divided into two paths through a precooler and a second oil separator; and the second path is connected with an air suction port of the low-temperature level compressor through an eighth solenoid valve, the low-temperature level air cooler, a sixth solenoid valve. a second pressure relief valve, a second gas-liquid separator, a third one-way valve and a second heat regenerator. The present invention has the obvious effects of large refrigeration section, high cooling rate, good energy-saving effect and thorough defrosting.

An apparatus and method are disclosed for simulating United States football and other sports that are held on a playing field. The user stands in an area that at least approximates an actual playing field, and an apparatus incorporated into a football helmet or other headgear worn by the user superimposes simulation images onto the field of view of the user, creating an illusion of simulated action taking place on the actual field where the user is standing. This makes the information and skills conveyed by the simulation directly relevant and immediately useful. Preferred embodiments track the location and orientation of the user and thereby allow the user to participate in the simulation. In another aspect, essentially the same apparatus and method are used to simulate driving or flying of vehicles without the need of an expensive mockup of the interior of the vehicle.

A crane trolley, especially a single-rail trolley with a short overall height, with a traveling mechanism frame (2) having a hoisting mechanism (1), which can travel by running wheels (3, 3a) on a rail, especially a lower flange (4a) of an essentially horizontal beam (4), wherein at least one running wheel (3a) can be driven, and a friction roller (10) interacting with the driven running wheel (3a) is arranged on the underside (4b) of the rail. In order to create a crane trolley that guarantees a reliable reduction in the slippage of the driven running wheel (3a) with a simple design, a pair of friction rollers (10) is provided, which may be positioned against the underside (4b) of the rail by adjusting the spacing from each other via a common pressing mechanism.

The invention relates to a distractible intervertebral implant having a first assembly (10) constituted by a first prosthetic plate (16) and a first spacer element (18), the prosthetic plate being secured to the first spacer element; a second assembly (12) constituted by a second prosthetic plate (22) and by a hollow second spacer element (24), having a first end secured to the second prosthetic plate and the first spacer element being suitable for sliding in the second spacer element; and means (14) for preventing the spacer element from moving in translation or in rotation relative to each other, the means having a clamping collar (28) surrounding a portion of the outside surface of the second spacer element, and a lock screw (30) for tightening the collar onto the second spacer element.

In one aspect of the invention a communication device including circuitry operable to facilitate dynamic impedance matching includes an image impedance operable to be coupled to a receiver/transmitter pair associated with a line impedance. The device also includes matching circuitry coupled to the line impedance and the image impedance, the matching circuitry operable to measure an impedance mismatch between the line impedance and the image impedance and to generate a control signal based on the measured impedance mismatch. The image impedance is operable to be varied to more closely match the line impedance based at least in part on the control signal.

There is provided a vacuum control system for allowing the degree of vacuum in a vacuum vessel to be kept constant, effectively and accurately removing vaporized components degassed into the vacuum vessel through a gas permeation diaphragm by stably introducing a very small amount of air into a vacuum exhaust path, and thus operating stably, and a vacuum degassing apparatus employing the vacuum control system. The vacuum control system controls the rotatory power of a DC brushless motor, continuously controls displacement of a vacuum pump, and thus keeps the degree of vacuum in a vacuum vessel constant, by decompressing the inside of the vacuum vessel using an exhaust vacuum pump which operates with the DC brushless motor, monitoring the inside pressure of the vacuum vessel using a pressure sensor, and controlling a voltage applied to the DC brushless motor on the basis of an output signal resulting from measurement of the inside pressure of the vacuum vessel by the pressure sensor.

The invention relates to a method capable of adjusting the polarization and the intensity of a terahertz wave rapidly and continuously. According to the method, a focusing lens is arranged at the outlet of a femto-second laser; incident laser passes through the focusing lens and a doubling frequency crystal in sequence to generate frequency doubled light; the frequency doubled light and remaining fundamental frequency laser pass through a uniaxial birefringent crystal wafer together; according to the principle that the refractive indexes of the fundamental frequency laser and the frequency doubled light in a uniaxial birefringent crystal are different, the optical path difference, namely the time delay, between the fundamental frequency laser and the frequency doubled light can be changed by adjusting the thickness of the uniaxial birefringent crystal wafer and the spatial included angle between a glass piece and an incident light beam, so that the relative phase between the fundamental frequency laser and the frequency doubled light is changed; and therefore, the polarization and the intensity of the finally generated terahertz wave are adjusted. Finally, the generated terahertz wave enters a terahertz wave detection system after being filtered by a high-resistance silicon wafer. By the method, the polarization and the intensity of the terahertz wave can be adjusted rapidly and continuously; and the operation is simple, rapid and effective.

The invention relates to a surface modification method for a polytetrafluoroethylene separation membrane. The method comprises the following steps of: activating the surface of the PTFE (polytetrafluoroethylene) membrane by virtue of a plasma technology, and then continuously depositing thin oxide layers on the surfaces of pore channels of the separation membrane by virtue of an atomic layer deposition technology to realize precise adjustment and control on pore diameter and surface properties of the separation membrane. According to the method, the plasma technology is used for pretreating, and then the atomic layer deposition is carried out, so that the growth mechanism of a deposition layer on the surface of the PTFE membrane is changed, the island type growthof the deposition layer is changed to conformal growth, the deposition layer is uniform and smooth, and the hydrophily, the pure water flux, the separating property and the anti-pollution capacity of the separation membrane are all obviously improved.

A process and a device for contactless measurement of rotational speed with a proximity sensor operating according to the eddy current principle. The proximity sensor comprises an inductor and a capacitor connected in parallel that form an oscillating circuit which can be excited from outside, and where the resonant frequency of the oscillating circuit experiences a detectable change when an object to be measured approaches the proximity sensor. In various embodiments, the resonant frequency of the oscillating circuit or the excitation frequency of the oscillating circuit is controlled as a reaction to slow changes of the resonant frequency in such a manner that the oscillating circuit is always excited with its resonant frequency or with a frequency close to its resonant frequency and that rapid changes are detected as a measurement signal for the measurement of rotational speed.