46results about How to "High pulse frequency" patented technology

The invention provides a pulse laser radar for large scale mapping and a method of the pulse laser radar. N sets of laser emitting units and echo detecting units are arranged on a laser head of the pulse laser radar, N>=2, and the N sets of laser emitting units and echo detecting units are distributed along the outer diameter of the laser head with a 2pi/N central angle with a rotary shaft as a center. Each laser emitting unit comprises a laser and an emitting optical system, each echo detecting unit comprises a detector and a receiving optical system, and according to the distance between the emitting optical systems and the receiving optical systems, the echo energy receiving rate ranges from 10 percent to 75 percent when the detecting distance ranges from 2 m to 15 m. High scanning frequency can be achieved, and the distance detecting dynamic range can be improved.

An ophthalmic laser device with a treatment beam path that includes a variably adjustable modulator. The ophthalmic laser device is adapted to determine for the radiation pulses to be inputted into the tissue a power density to be inputted into the relevant target volume through the treatment beam path depending on a spatial distance between two target volumes of immediately successive radiation pulses and to adjust the modulator parallel in time with the control of the deflecting unit such that the relevant pulse in the target volume has the determined power density.

For processing eye tissue (8) by means of femtosecond laser pulses, an ophthalmological device (1) includes a projection optical unit (2) for the focused projection of the femtosecond laser pulses into the eye tissue (8). Disposed upstream of the projection optical unit (2) is a first beam-deflecting scanner system (3) for scanning the eye tissue (8) with the femtosecond laser pulses along a processing line. A second beam-deflecting scanner system (5) is disposed upstream of the first scanner system (3) and is designed for scanning the eye tissue (8) with the femtosecond laser pulses in a scanning movement superimposed on the processing line and running in a deflection plane. The second scanner system (5) has a scanner speed that is a multiple of the scanning speed of the first scanner system (3). A rotation system is provided for aligning the deflection plane with a defined angle with respect to the processing line.

The invention relates to a multipath pulse laser integrated system on a quasi-molecule laser ophthalmic therapy apparatus, realizing the light path synthesis of at least two laser beams through a mechanical mode. A porous rotary wheel (or porous reflecting mirror) is arranged in the multipath pulse laser integrated system, a small hole and the reflecting mirror are alternated by utilizing the rotation of the rotary wheel through a mechanical shutter mode. A light-emitting diode is arranged in front of the rotary wheel, a photoelectric detector is placed behind the rotary wheel, the permeation of the light rays of the light-emitting diode is controlled through the rotation of the rotary wheel, the photoelectric detector can generate voltage timing-sequence signals to control the starting of different lasers, thereby achieving the integration of laser pulses. The multipath pulse laser integrated system ensures that a laser source of the quasi-molecule laser ophthalmic therapy apparatus simultaneously satisfies the requirements of high-pulse frequency, high-energy stability and sufficient pulse energy, and provides a technical solution scheme for the clinical application of the quasi-molecule laser ophthalmic therapy apparatus at present.

The invention discloses a special-purpose high-frequency pulse power supply for an ultrafine micro electric discharge machine tool, which mainly includes two modules, namely a main control module and a high-frequency discharge module. Its power supply discharge voltage and discharge gap are multi-level adjustable, and the two can be combined at will. The invention can adapt to discharge machining of different materials, processing sizes and precisions, and can conveniently expand the pulse power supply to multi-pulse output, so as to adapt to various types of ultra-fine electric discharge processing machine tools.

The invention discloses an electric control type rainproof monitoring camera, and relates to the technical field of monitoring devices. The monitoring camera comprises a monitoring body and a protection cover, wherein the monitoring body is installed at the bottom of the protection cover. The outer side of the end, away from the monitoring body, of the protection cover is installed on a monitoringrod. A heat conducting plate is fixedly connected into the protection cover; one side of the heat conducting plate is in heat conduction connection with the monitoring body; one side, far away from the monitoring body, of the heat conducting plate is fixedly connected with a plurality of conductive springs and power generation sheets; the output ends of the power generation sheets are electrically connected with a controller; and the controller is mounted in the protection cover and is electrically connected with the plurality of conductive springs. In sunny days, the monitoring body gradually generates heat in the continuous working process to increase the temperature in the protection cover, the controller is matched with the thermoelectric power generation sheets to output pulse current to the multiple conductive springs, and the conductive springs pull the sliding plate to move back and forth in the protection cover at intervals, so that hot air in the protection cover is quicklyexhausted, and direct heat dissipation is carried out.

The invention relates to a power circuit for a light emitting diode (LED) illuminating lamp. The power circuit is a conversion circuit converting mains supply into direct current ripple voltage with ripple frequency between 100Hz and 200Hz. As the power circuit for the LED lamp can convert the mains supply into the direct current ripple voltage, the LED is switched on to emit light only in a pulse high level receiving time interval but stops emitting light in a pulse low level receiving time interval, and therefore, the LED is in an on/off alternate state, fatigue, caused by long-time continuous working, of the LED, can be avoided, heat productivity is reduced, service life of the LED is prolonged greatly, and consumption of nonferrous materials for a radiator is reduced.

An arrangement and method is provided for operating a light-emitting device, wherein, a pulsed current is generated with a pulse frequency by a driver circuit, which has a clock pulse generator providing clock pulse signals for current pulsing, and a light-emitting device, which functionally couples to the driver circuit and which is formed with one or a plurality of organic light-emitting diodes, is loaded with the pulsed current with a pulse frequency of approximately 10 kHz to approximately 100 kHz, wherein: T_PWM<(T_rise+T_fall) and wherein T_PWM indicates the pulse length for the clock pulse signals generated by the clock pulse generator of the driver circuit and T_rise and also T_fall indicate the pulse rise time and the pulse fall time for the current pulses present at the one or the plurality of organic light-emitting diodes.

This invention is an automobile anti-lock device with liquid dual plunger auto pressure-adjustment used for the passenger car and the truck below 8t and the car with over 3.0 liter exhaust. It includes triple body, valve body and outlet nozzle. The triple body is fixed on and connected with the valve body by the connectors, and one side of the valve body the outlet nozzle, the valve body is fixed on and connected with the oil cylinder and form a lumen which is sealed by the O-type lock ring. The close pressure filter screen of the O-type ring can prevent dirty things from entering the oil cylinder in which is installed with slide plunger. The upper and lower ends of the plunger are tightly connected with the stern oil seal and its middle is fixed on two Yx oil seals. The hydraulic oil is injected into the oil cylinder, the self-pressuring spring is set in the plunger and the spring is dipped in the hydraulic oil. The outlet nozzle is connected with the thread of the valve body and its one end is top against the steel ball which another side is top against the outlet valve, which thread is linked with the valve body. The connectors of the base pump, the pinch nut and the triple body can form a variable-position triple valve. This invention can self-adjust the braking pressure in use in order no to lock the wheels and drag the tires. The vehicle will not be off tracking, whipping and sideslip. The steering wheel will not be locked but steered freely and lightly, so it has more obvious anti-lock effect.

The invention discloses a main engine device of a low-and-medium-frequency therapeutic apparatus. The main engine device comprises a control unit, a collecting unit and a wireless transceiving unit, wherein the collecting unit comprises at least three pulse sensors, the pulse sensors are connected with the therapeutic apparatus through a wired or wireless manner and collect pulse information of the waist, the neck and the head of a person in real time during working of the control unit, the control unit is used for performing comparison operation on pulse data acquired by the collecting unit,and preset relational data about pulses of a human body and working frequencies of the therapeutic apparatus are stored in the control unit and are output and controlled according to rules of the control unit. The main engine device of the low-and-medium-frequency therapeutic apparatus has the advantages that by storing the preset relational data about the pulses of the human body and the workingfrequencies of the therapeutic apparatus in the control unit and outputting and controlling the preset relational data according to the rules of the control unit, physical therapies of the therapeuticapparatus can achieve the best effects, and through cooperation of a data importing manner and real-time detection, customized and precise control over different individuals is realized.

The invention discloses a metal shell welding method which is suitable for a lithium battery shell. The metal shell welding method comprises the steps of laminating and stacking an upper metal shell and a lower metal shell on a clamp base, and pressing the upper metal shell and the lower metal shell by a clamp pressing block, wherein the flatness of the binding surface of the clamp pressing block and the clamp base is less than 0.05 mm; and scanning the surface of the metal upper shell along the welding track by adopting a nanosecond laser to form a welding seam to connect the metal upper shell and the metal lower shell. According to the metal shell welding method, the flatness of the binding surface of the clamp pressing block and the clamp base is 0.05 mm or less, the binding degree of the clamp and the upper metal shell and the lower metal shell is improved, meanwhile, the nanosecond laser is adopted for welding, compared with a quasi-continuous laser, the advantages of being high in pulse frequency, concentrated in energy density, small in heat affected zone and the like are achieved, the phenomena of tilting, deformation and the like of the metal shell in the welding process are reduced, and the sealing performance of the metal shell is improved.

The invention relates to fatigue test equipment. The invention discloses a pulse fatigue test device for a pressure vessel. The device comprises a pneumatic loop and a hydraulic loop which are respectively connected with a test container (1). A pneumatic control device is arranged on the pneumatic loop. The air pressure in the test container (1) can be controlled through the pneumatic control device. A hydraulic control device (3) is arranged on the hydraulic loop so that the liquid level in the test container (1) can be controlled through the hydraulic control device (3), and an air pressuredetection unit (4) used for detecting air pressure and a liquid level detection unit (5) used for detecting the liquid level are arranged in the test container (1). According to the invention, the actual working condition of the pressure vessel can be better simulated, so that the result of the fatigue test is more accurate.