42results about How to "Uniform amplitude" patented technology

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 discloses an ultrasonic cutting tool. The ultrasonic cutting tool comprises a transducer, a variable amplitude rod, a changeover mechanism and a blade, wherein the transducer is connected with the variable amplitude rod; the top of the changeover mechanism is connected with the variable amplitude rod; and the bottom of the changeover mechanism is connected with the blade. According to the ultrasonic cutting tool, the blade and the changeover mechanism resonate in the same vibration mode under the same frequency, the blade well vibrates, vibration amplitude is uniform, obvious pitch surfaces do not exist on the blade, and the phenomenon of local tool sticking is avoided; besides, the blade is of a flakelike structure, an edge is relatively long, cutting depth is relatively large, processing range is relatively wide, and difference of cut angles of the two ends of a cutting surface and interference between the upper end of the cutting tool and a material are avoided; and the changeover mechanism can be manufactured through an aluminium alloy, cost is reduced, the flakelike blade can be manufactured through stainless steel or alloy steel, hardness is much higher than that of a titanium alloy, the cutting tool can be utilized to cut relatively hard materials, and utilization range of the ultrasonic cutting tool is greatly increased.

The invention discloses an indoor signal equalization distribution system, which includes an indoor micro base station and a plurality of radio frequency power equalizers connected in series through radio frequency transmission lines, the signal output port of the indoor micro base station is connected to the radio frequency power equalizer at the head end through the radio frequency transmission line The signal input port is connected, the branch signal output port of each said radio frequency power equalizer is respectively connected with a radiation antenna, each said radio frequency power equalizer, the radio frequency transmission line connected with the signal input port of the radio frequency power equalizer and connected The radiation antenna on the radio frequency power equalizer is a signal radiation node. The invention can make the 5G signal fully covered indoors, and the coverage, amplitude and phase of the signal are highly consistent, and the receiving effect of the mobile terminal is good.

The invention belongs to the technical field of ultrasonic machining of non-traditional machining technologies and discloses a single-excitation two-dimensional ultrasonic vibration-assisted micro machining platform. The single-excitation two-dimensional ultrasonic vibration-assisted micro machining platform comprises a right-angle-shaped bottom plate, linear guide rails, an upper vibration block, a lower vibration block, supporting plates, amplitude-change poles, transducers and an ultrasonic generator. The upper vibration block and the lower vibration block are perpendicular to each other in the feeding and cutting edge working engagement directions. The lower vibration block is connected with the bottom plate through the corresponding linear guide rail, and the lower vibration block is connected with the upper vibration block through the corresponding linear guide rail. A workpiece is fixed to the upper vibration block in a threaded connection mode. The vibration blocks are connected with the amplitude-change poles through studs, and the amplitude-change poles are connected with the transducers through studs. The two amplitude-change poles are fixed to the bottom plate through the supporting plates at joints. The two transducers are connected with the same ultrasonic generator through guide lines, two ultrasonic signals are output simultaneously, the phase difference adjusting function is achieved, by adjusting the amplitude and phase difference of the output signals of the ultrasonic generator, different elliptical vibration paths are coupled according to actual demands, and high-efficiency and high-precision machining is achieved.