42results about How to "Uniform amplitude" patented technology

A neurostimulation system and method of blocking a neural axon. Time-varying electrical energy is conveyed to a blocking site on the neural axon for an initial phase. The conveyed electrical energy has an amplitude and frequency during the initial phase sufficient to block action potentials from propagating along the neural axon from a location proximal to the blocking site to a location distal to the blocking site. The time-varying electrical energy is conveyed to the blocking site on the neural axon for a subsequent phase contiguous with the initial phase. The conveyed electrical energy has a decreased amplitude and a frequency during the subsequent phase sufficient to maintain blocking of the action potentials along the neural axon from the location proximal to the blocking site to the location distal to the blocking site.

A test system and method for indoor testing of a mobile antenna terminal having a first antenna with a first aperture of a first size and, preferably, operable in a receive-only mode and/or a transmit and receive mode. The system uses a second antenna having a dual port feed and a reflector, the second antenna having a second aperture of a second size, which is two or more times the first size, and being operative to form a plane wave. The first antenna is mounted to a test platform that is positioned within the second aperture and is operative for rotating and tilting movement of the antenna to simulate movement on a vehicle. The test system uses a source of RF test signals and communications test equipment coupled to at least the first antenna, as well as a processor for determining a performance of the mobile antenna terminal.

A structure of speaker is disclosed. The disclosed speaker structure includes at least a bobbin, a coil, a membrane, and a magnetic assembly. The coil is wound around the side surface of the bobbin, and the membrane is disposed at end of the bobbin. Besides, the magnetic assembly is suspended in a through hole of the bobbin and have one end adhered to the membrane.

A pulverizer without pollution and noise is composed of mainshaft, rotor, hammer plates, feeding inlet, discharging outlet, sieving plate, base, supporting frame, vibrators, seated vibration damper between base and the assemblage consisting of toothed plate, sieving plate, gate and said inlet and outlet, and the pressing vibration damper between supporting frame and assemblage.

A small ultrasound diagnostic device is provided at a low cost that enables the appropriate control by a single power supply unit so as to give a predetermined transmission power to a driving waveform different for each mode without excess or deficiency and without affecting properties of the driving waveform. The ultrasound diagnostic device includes: an ultrasound generation unit (1) that transmits ultrasound; a waveform generation unit (2) that generates a single pulse or a burst pulse whose duty factor is variable in units of a time that is a period corresponding to a frequency outside a frequency band of the ultrasound generation unit (1) so as to drive the ultrasound generation unit (1); and a single power supply unit (3) that determines an amplitude of a driving waveform generated by the waveform generation unit (2). Thereby, an acoustic power of the transmitted ultrasound can be controlled without making the transmission amplitude variable.

An interwoven spreading code is formed by a stretched spreading code series at a first frequency and a mirror of the stretched spreading code series at a second frequency. The interwoven spreading code can be used to spread a baseband signal. Data can be recovered through correlation of a received signal with the interwoven spreading code. The spreading code used in forming the interwoven spreading code can be a Barker code.

The invention relates to an anti-collision circuit for automobiles travelling in foggy roads and devices thereof, wherein the circuit consists of a plurality of groups of circuits which are composed of safety switches, transformers, far infrared emitters, far infrared receivers, relays, green lights and red lights; and the devices consist of upright columns (1), lamp brackets (2), lamp holders (3) and electrical boxes (4), and the interval and the number of the devices are determined according to local climatic conditions and visibility in the foggy weather. The invention has the advantages that automobiles traveling on foggy roads are uniformly spaced, thus the automobiles are prevented from suffering from traffic accidents, i.e. rear-end collisions; and the anti-collision circuit and the devices thereof disclosed by the invention are also suitable for uniformly-spaced traveling of automobiles on a bridge floor, the carrying capacity, and the vibration frequency and the amplitude of vibration of the bridge floor are uniformed and no crowding of the automobiles on the bridge floor is ensured, so that the damage to a bridge is prevented and the service life of the bridge is prolonged.

Disclosed are a foggy road vehicle anti-collision circuit and devices thereof. The foggy road vehicle anti-collision circuit is composed of various circuits formed by safety switches, transformers, far infrared emitters, far infrared receivers, relays, green lights and red lights, the devices are composed of stand columns (1), light holders (2), light bases (3) and electric appliance boxes (4), and spacing distance and numbers of the devices are determined according to local climatic conditions and visibility of foggy days. The foggy road vehicle anti-collision circuit and the devices thereof have the advantages that road vehicles on foggy days can travel at equal intervals, road accidents of vehicle rear-end collision can be prevented, the foggy road vehicle anti-collision circuit and the devices thereof are also suitable for traveling of bridge road vehicles at equal intervals, bridge road carrying capacity, vibration frequency and amplitude are uniform, bridge road vehicles can be prevented from being jammed, damages to a bridge can be prevented, and the service life of the bridge can be prolonged.

The application belongs to the technical field of metasurface application, and provides an image decryption method, the image decryption method is applied to an image decryption system, and the imagedecryption system comprises a preset light source, a first phase change material metasurface group and a second phase change material metasurface group; a first sub-laser is controlled to be incidentto the first phase change material metasurface group, and a second sub-laser is controlled to be incident to the second phase change material metasurface group; the first sub-laser is modulated by reference image information to generate first modulated light, and the first modulated light is emitted from the first phase change material metasurface group and then focused to an imaging area; the second sub-laser is modulated by the reference image information to generate second modulated light, and the second modulated light is emitted from the second phase change material metasurface group andthen focused to the imaging area; and the encrypted information in the imaging area is obtained according to interference signals generated by the first modulated light and the second modulated light.According to the embodiment of the invention, the problem that the encrypted information obtained by decryption is missing or unclear is solved.

The invention relates to the technical field of ultrasonic equipment, and aims to provide a longitudinal-radial coupled vibration double-roller ultrasonic rolling welding device. The longitudinal-radial coupled vibration double-roller ultrasonic rolling welding device comprises an ultrasonic vibration part and a fixed clamping part, wherein the ultrasonic vibration part comprises a double-roller seam welding tool head and ultrasonic transducer switches, the double-roller seam welding tool head is arranged coaxial with the ultrasonic transducer switches; the double-roller roll welding tool head is composed of two T-shaped roll welding tool heads which are in butt joint, disc structures at the ends of the two T-shaped roll welding tool heads are connected through bolts to achieve symmetrical arrangement, and the ends of axial amplitude-change poles of the two T-shaped roll welding tool heads are each connected with an ultrasonic transducer; coaxial conductive slip rings are respectively arranged at the end parts of the outer sides of the two ultrasonic transducers; and the fixed clamping part comprises a set of synchronous belt wheels, two sets of fixed shells and two sets of bearings. According to the longitudinal-radial coupled vibration double-roller ultrasonic rolling welding device, it can be ensured that the ultrasonic vibration part achieves the optimal vibration effect at the resonant frequency of the ultrasonic vibration part, and the high-speed rotation function of the ultrasonic vibration part is achieved; and stable feeding is achieved while welding is conducted, the problem of material extrusion in the welding process is solved, and better welding sealing is achieved on different material thicknesses.

The invention provides an earthquake data combination method, apparatus and system. The method comprises: correcting seismic channels of earthquake data to the same starting time; carrying out offset distance grouping and azimuth grouping on the earthquake data after correction; and performing superposition on the seismic channels in each group after the offset distance grouping and azimuth grouping are performed, and finishing combination of the earthquake data. By using each embodiment of the invention, at the time when the earthquake data is compressed, the influence on original data is reduced, and the spatial distribution characteristic and the effective information of the original data are well maintained. According to the invention, at the time when the earthquake data with wide azimuth angles is compressed, the signal-to-noise ratio of the earthquake data after compression can also be improved, and convenience is provided for subsequent earthquake data processing and interpretation.

There is provided a an apparatus for manufacturing a display device. An apparatus for manufacturing a display device comprises a body generating ultrasonic vibration; and a horn including a horn body portion connected to the body and amplifying the ultrasonic vibration and a horn tip portion connected to the horn body portion and applying the ultrasonic vibration onto a bonding object, wherein the horn body portion includes at least one body groove surrounded by the horn body portion and completely penetrating the horn body portion in a thickness direction from the surface of the horn body portion.