72 results about "Pulsed mode" patented technology

The invention provides an electric tungsten fire needle tumor ablation system, and the system comprises an image navigation module which is used for integrating CT / MRI / ultrasonic images, constructing a three-dimensional tumor model in real time, tracking a target region through electromagnetic positioning, and dynamically calibrating a needle insertion path; the insulating tungsten fire needle execution module is used for adopting a high-density tungsten alloy needle body and a multi-axis mechanical arm to control multi-angle puncture; the energy output module is used for intelligently adjusting radio frequency / microwave power and releasing energy in a pulse mode; and the temperature control feedback module is used for monitoring the temperature in real time and automatically terminating overheating energy. According to the technical scheme, accurate, safe and effective ablation of tumors is achieved.

The application relates to the technical field of welding, and discloses a pulse ring-shaped light spot laser welding method and a laser welding device. The method comprises the following steps: controlling a laser emitter to emit a first laser beam and a ring-shaped laser beam arranged around the periphery of the first laser beam, so that the first laser beam and the ring-shaped laser beam irradiate a to-be-welded area; controlling the ring-shaped laser beam to preheat the to-be-welded area in a first pulse mode; under the condition that the to-be-welded area reaches a preset temperature, controlling the first laser beam to heat the to-be-welded area at a first power; under the condition that the to-be-welded area is heated to form a molten pool, controlling the first laser beam and the ring-shaped laser beam to synchronously move along the extension direction of a weld at a first welding speed, and controlling the power of the first laser beam to be constant and controlling the ring-shaped laser beam to complete welding of the to-be-welded area in a second pulse mode. The application discloses the pulse ring-shaped light spot laser welding method and the laser welding device, and solves or improves the problem of poor weld quality.

This invention provides a multi-wavelength mode-locked fiber laser with adjustable wavelength spacing. It comprises a nonlinear amplifying ring consisting of a pump source (01), a wavelength division multiplexer (02), an erbium-doped fiber (07), a 3km single-mode fiber (08), a three-ring polarization controller (041), a coupler (03), and an optical fiber conduit (12) to achieve pulse mode-locking. A mode selection coupler (05) is used to convert from the fundamental mode to higher-order modes. An improved Sagnac ring consisting of a coupler (06), an optical fiber conduit (17), a three-ring polarization controller (042, 043), and polarization-maintaining fibers (09, 10) is used to achieve multi-wavelength and adjustable wavelength spacing. This multi-wavelength mode-locked fiber laser can achieve multi-wavelength pulsed mode-locked laser with adjustable output wavelength spacing and can be widely used in wavelength division multiplexing, optical communication, optical sensing systems, and other fields.

Device for controlling at least one light-emitting diode (LED1) to generate short light pulses (LP),- with an H-bridge (H) consisting of a first half-bridge (HB1: T1, T2) with a first transistor (T1) and a second transistor (T2) and a second half-bridge (HB2: T2, T3) with a third transistor (T3) and a fourth transistor (T4),- wherein the H-bridge (H) is controlled by a control unit (ST) and- wherein the H-bridge (H) can be operated by the control unit (ST) in pulsed mode (GPB) and in quasi-continuous mode (QDB) and- wherein the first half-bridge (HB1: T1, T2) is supplied with electrical energy from a first positive supply voltage (VCC1) and a first negative supply voltage (GND1) and- wherein the second half-bridge (HB2: T3,T4) is supplied with electrical energy from a second positive supply voltage (VCC2) and a second negative supply voltage (GND2) and- wherein the light-emitting diode (LED1) is connected with its cathode (K) to the output of the first half-bridge (HB1: T1, T2) and- wherein the light-emitting diode (LED1) is connected with its anode (A) to the output of the second half-bridge (HB2: T3, T4) and- wherein the first positive supply voltage (VCC1) and the second positive supply voltage (VCC2) can be equal and- wherein the first negative supply voltage (GND1) and the second negative supply voltage (GND2) can be equal and- wherein the light source, in particular the one or more light-emitting diodes (LED1), represents the load of the H-bridge (H) between the output of the first half-bridge (HB1: T1, T2) and the output of the second half-bridge (HB2: T3, T4) and- wherein the control device (ST) is designed to operate in pulsed mode (GPB) a “PAn” condition,in which a forward voltage in the forward direction of the light-emitting diode (LED1) is applied to the light-emitting diode (LED1) through the H-bridge (H), is not maintained by the H-bridge (H) for longer than a turn-on time (τpp), and- wherein the control device (ST) is designed so that in pulsed operation (GPB) a "PAus" state, in which a reverse voltage against the forward direction of the light-emitting diode (LED1) is applied to the light-emitting diode (LED1) through the H-bridge (H), is not maintained by the H-bridge (H) for longer than a clearing time (τpn), and- wherein the clearing time (τpn) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1), and- wherein the turn-on time (τpp) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1).

The invention discloses a method for improving corrosion resistance of a pure aluminum surface in a NaCl solution, and relates to the technical field of high-current pulsed ion beams, an experiment is carried out on a TEMP-6 type HIPIB device, and a polymer anode unipolar pulse mode external magnetic insulation ion diode is adopted to generate 70% C and 30% H ion beams for an irradiation experiment; the ion beam parameters are as follows: the acceleration voltage is 300kV, the pulse width is 70-80ns, the beam density is 100A / cm < 2 >, the irradiation frequency is five times, and the background vacuum degree of a vacuum chamber during irradiation is 10 <-3 > Pa.

Matching circuitry is disclosed for power generation in a plasma processing apparatus or other application. Matching circuitry is provided in a unitary physical enclosure and is configured to provide impedance matching at multiple different frequencies. For example, in a dual frequency implementation, first and second RF generators can provide electromagnetic energy at first and second respective frequencies in a continuous mode or a pulsed mode to matching circuitry that includes first and second circuit portions. The first circuit portion can include one or more first tuning elements configured to receive RF power at a first frequency and provide impedance matching for a first ICP load (e.g., a primary inductive element). The second circuit portion can include one or more second tuning elements configured to receive RF power at a second different frequency and provide impedance matching for a second ICP load (e.g., a secondary inductive element).

The present disclosure provides a fusion system and method for radiation imaging and radioactive material monitoring of a baggage or package item. The fusion system includes a radiation imaging subsystem configured to operate in a pulsed mode to radiation image the baggage or package item, a radioactive material monitoring subsystem configured to operate in a pulsed mode to monitor whether the baggage or package item contains radioactive material, and a synchronization control subsystem in communication with both the radiation imaging subsystem and the radioactive material monitoring subsystem and configured to control the radiation imaging subsystem and the radioactive material monitoring subsystem to operate alternately.

The application provides a saturable absorption device, a preparation method and a low-threshold starting pulse mode-locked laser, and relates to the technical field of lasers. The application discloses a method for preparing a high-quality bismuth copper selenium oxide single crystal by a chemical vapor transport method, and a saturable absorption device prepared by simply using the high-quality bismuth copper selenium oxide single crystal can be applied to a pulse mode-locked laser, and can generate super-short pulse laser output, has high stability and a high signal-to-noise ratio, and has a low starting threshold.

The invention discloses an application method of a pulse mode in linear speed regulation of an electric tool. The application method aims at solving the problem that in the prior art, when an impact screwdriver deals with locked-rotor, the requirements for locked-rotor avoidance, linear power output and operation hand feeling optimization cannot be met at the same time. According to the technical scheme, when the electric tool carries out load operation and a central control chip detects that the electric tool is locked, a pulse mode is automatically started, then the duty ratio is increased by continuously pressing a pressing switch, and therefore the torque of a main shaft is gradually increased till critical impact torque is broken through and an impact state is entered, and at the moment, the pulse mode is quitted. In the pulse process, even if the instantaneous output energy is continuously increased, the average output power is low, the situation of hand twisting can be avoided, along with pressing of the pressing switch, the handheld part can obviously feel feedback of force, and the feedback is in linear positive correlation with the pressing switch.

Method for operating a fine sieve machine (1) with at least one sieve deck (10) for receiving at least one sieve lining (21) and at least one ultrasonic vibration exciter (23) for generating ultrasonic vibrations which are transmitted to the sieve lining (21), characterized in that the at least one ultrasonic vibration exciter (23) is operated in pulsed mode, wherein the ultrasonic vibration exciter (23) repeatedly switches between a first operating mode with a first vibration amplitude and a second operating mode with a second vibration amplitude that is smaller than the first.

The invention discloses reactive ion etching equipment and an etching method for processing a semiconductor device, and relates to the technical field of semiconductor etching, and the reactive ion etching equipment comprises a reaction cavity which is provided with an upper gas distribution area and a lower sample placement area; wherein at least a first chamber and a second chamber are formed in the reaction chamber, the first chamber and the second chamber cover part of the wafer, and airflow control units are arranged in the first chamber and the second chamber; etching gas passes through the plasma from top to bottom and forms a sheath layer above the sample stage, so that ions generated by the plasma pass through the sheath layer and then are incident towards the surface of the wafer. Through the combination of structural partition, movable recovery and variable gas supply, sample table cooperation and closed-loop sequential control, the etching stability in a continuous mode is kept, the influence of by-product accumulation on the etching precision in a pulse mode is reduced, and the repeatability, the selective control capability and the device yield of pulse etching are improved.

The invention relates to a method for operating a fuel cell system (1) comprising a fuel cell stack (2) with a cathode (2.1) and an anode (2.2), wherein hydrogen is supplied to the anode (2.2) via an anode circuit (3), which is taken from a tank and metered into the anode circuit (3) by means of a hydrogen metering valve (4), and wherein anode gas containing residual hydrogen exiting the anode (2.2) is recirculated via the anode circuit (3). According to the invention, the hydrogen metering valve (4) is operated in pulsed mode, at least temporarily, particularly during partial load operation, so that pressure pulses promoting water discharge are generated in the anode circuit (3) and in the anode (2.2). The invention further relates to a control unit for executing the method or process steps.

A dental procedure performed on target tissue without anesthetic or anesthesia including preconditioning the target tissue using a laser device constructed to produce light in a wavelength range of 2750 nm to 11500 nm, to provide an energy fluence in a range of 50 J / cm2 to 100 J / cm2, and to operate in a free running pulsed mode providing 60 μm bursts at a frequency of at least 50 Hz. Preconditioning includes selecting a combination of average optical output power and preconditioning time to administer low level laser therapy. The laser device is adjusted to deliver light through the light guide of the laser device at the selected average optical output power. Light delivered through the light guide of the adjusted laser device is directed toward the target tissue for the selected preconditioning time providing analgesia to the target tissue. Oral tissue is removed from the preconditioned target tissue during analgesia.

The utility model relates to DSA equipment. The DSA equipment comprises a C-shaped arm, an X-ray tube, an inverter box and a high-pressure oil tank. The high-pressure oil tank is connected with the inverter box through a first cable; the high-voltage oil tank and the X-ray tube are both arranged on the C-shaped arm, the inverter box is used for providing high-frequency alternating current for the high-voltage oil tank, and the high-voltage oil tank is used for converting the high-frequency alternating current into high-voltage direct current so as to provide a high-voltage direct-current electric field for the X-ray tube, so that X-rays are generated in the X-ray tube. The high-voltage oil tank and the X-ray tube are arranged on the C-shaped arm, so that the distance between the high-voltage oil tank and the X-ray tube is greatly shortened, a high-voltage cable between the high-voltage oil tank and the X-ray tube is shortened or canceled, and the situation that when the system works in a kV pulse mode, a large number of invalid rays are generated when voltage drops is avoided; therefore, the radiation dose of doctors and patients is reduced. And meanwhile, the second cable is short, so that the difficulty and the cost of cable laying can be reduced.

1. The name of the design product: graphic user interface of dot laser therapy machine for electronic equipment. 2. The use of the design product: for human-computer interaction and display information. 3. The design points of the design product: in the graphic user interface. 4. The picture or photo that best shows the design points: front view. 5. The design for which protection is sought contains color. 6. The use of the graphic user interface: for electronic equipment. 7. The human-computer interaction mode of the graphic user interface: the user can select different programs by clicking or touching the icons / words in the interface. 8. The change state description of the graphic user interface: click "pulse mode" at the bottom of the front view, the interface jumps to interface change state figure 1; click "system settings" at the bottom of interface change state figure 1, the interface jumps to interface change state figure 2; click "system information" at the bottom of interface change state figure 2, the interface jumps to interface change state figure 3.

The application provides a direct-current high-voltage pulse strong-current pulse neutron generator, and relates to the technical field of neutron generators, comprising a main arc power module (3), a high-voltage accelerating power module (9) and a neutron tube (12). The neutron generator of the application is a strong-current pulse neutron generator working and driven in a direct-current high-voltage accelerating and pulse mode, can realize adjustable pulse parameters, is simpler to realize, widens the neutron pulse width from sub-microsecond to several milliseconds, and is helpful to widen the application field of the strong-current pulse neutron generator. For example, the ms-level strong-current pulse neutron source can be applied to the mass flow rate and component measurement based on neutron activation.

In certain embodiments, an ophthalmic laser surgical system for treating a floater in a vitreous of an eye includes a floater detection system, a laser device, and a computer. The floater detection system determines the location of the floater in the vitreous of the eye. The laser device directs a laser beam along a laser beam path towards the floater. The computer accesses a three-dimensional scan pattern for the laser beam that yields a three-dimensional pulse pattern of laser pulses. The three-dimensional pulse pattern has a bubble shield pulse pattern at the posterior side of the three-dimensional pulse pattern. The bubble shield pulse pattern forms a bubble shield that reduces laser radiation exposure at a retina of the eye. The computer instructs the laser device to direct the laser beam towards the floater according to the three-dimensional scan pattern.

The invention relates to the technical field of chemical engineering and equipment, and discloses a continuous feeding reaction device for lignin photodegradation, which comprises a reaction tube, an LED light source array and a transducer arranged outside the reaction tube, and a rotating shaft arranged inside the reaction tube and driven by a rotation driving mechanism. A composite scraping mechanism is mounted on the rotating shaft and is used for forcibly scraping reaction liquid on the inner wall of the reaction tube to form a thin film. The transducer is used for generating an ultrasonic standing wave field to drive photocatalyst particles to form a high-density array; the LED light source array works in a pulse mode, and the triggering time of light pulses of the LED light source array is matched with the time when the density of the catalyst array reaches a peak value. Through the synergistic effect of dynamic film scraping self-cleaning, the sound field tissue catalyst and pulsed light synchronous irradiation, the problems of light shielding, easy blockage and slow mass transfer in a high-viscosity dark multiphase system are solved, and the reaction efficiency and stability are improved.

Headlights (SW), in particular for use in vehicles,- with at least one first LED (LED1) as a light source and- wherein the headlight (SW) may include further light sources and- wherein the headlight (SW) emits light in a emitted wavelength range (AWB) in the visible wavelength range and- wherein the headlight (SW) is capable of emitting light pulses in at least one visible wavelength range, the light pulsed wavelength range (LPWB) and- wherein the light pulsed wavelength range (LPWB) is a sub-range of the emitted wavelength range (AWB) of the headlight (SW) or is equal to the emitted wavelength range (AWB) of the headlight (SW) and- wherein the first LED (LED1) can emit light in this light pulsed wavelength range (LPWB) and- with an H-bridge (H) for controlling and supplying the first LED (LED1) with electrical energy,- wherein the H-bridge (H) is controlled by a control device (ST) and- wherein the H-bridge (H) can be operated by the control device (ST) in pulsed mode (GPB) and in quasi-continuous mode (QDB) and- wherein the control device (ST) is designed such that in pulsed mode (GPB) a "PAn" state, in which a forward voltage in the forward direction of the LED (LED1) is applied to the LED (LED1) by the H-bridge (H), is not maintained by the H-bridge (H) for longer than a turn-on time (τpp) and- wherein the control device (ST) is designed such that in pulsed mode (GPB) a "PAus" state, in which a reverse voltage is applied to the LED (LED1) by the H-bridge (H), is not maintained by the H-bridge (H) for longer than a turn-off time (τpn)and- where the clearing time (τpn) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1) and- where the turn-on time (τpp) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1).

The present invention provides technology that achieves more accurate measurement while preventing luminance saturation.　The present technology provides a measurement device, etc., comprising a light source capable of switching between pulse operation and CW operation, and a control unit that controls the switching between pulse operation and CW operation, wherein the light source includes a saturable absorber that exhibits a quantum-confined Stark effect (QCSE). The control unit may control a voltage applied to the saturable absorber to switch between pulse operation and CW operation.

The invention provides a light dose control method and device and a physical therapy lamp, and relates to the technical field of physical therapy lamps, the physical therapy lamp comprises at least one light emitting array, light emitting monomers with different wavelengths and different numbers are configured in the array, and a touch screen is used for generating a control signal of a target light dose. After the system receives the control signal, a light dose calculation process is started, distribution information, wavelength types and irradiation distances of the light-emitting monomers and preset irradiance data corresponding to different wavelengths and distances are obtained, and the output percentage, the pulse mode, the power mode and the irradiation time of each wavelength channel are obtained. The system calculates the current light dose based on the irradiance data, the output percentage, the pulse coefficient, the irradiation time and the power coefficient, and adjusts the irradiation parameters of the light-emitting array according to the difference value between the calculation result and the target light dose, including the adjustment power, the pulse mode, the irradiation time or the number of switches of the light-emitting monomers, so that the output light dose meets the target requirement.

The invention relates to a preparation method of a probe surface coating of an MEMS probe card. The preparation method comprises the following steps: 1) fixing a metal probe in a deposition chamber of a three-dimensionally rotatable magnetron sputtering tool; (2) introducing inert gas into the deposition chamber, and applying direct-current negative bias to remove pollutants on the surface of the probe; (3) applying negative bias voltage in a pulse mode; (4) sputtering and depositing a metal and silicon composite coating in an inert gas atmosphere; (5) introducing acetylene, applying negative bias to deposit a high-hardness diamond-like carbon layer on the surface of the composite coating, and synchronously introducing carbon tetrafluoride; (6) continuously increasing the flow of carbon tetrafluoride and reducing the flow of acetylene; (7) stopping introducing acetylene when the flow of the carbon tetrafluoride reaches 120sccm and the refractive index is less than or equal to 1.8; (8) switching off the power supply, introducing inert gas for temperature control cooling, and taking out the probe after cooling to room temperature; and (9) stripping the coatings of the probe head and the probe tail, so that the conductivity of the probe is not influenced.

The invention discloses a radioactive drug subpackaging device and method, and relates to the field of biological medicines.The subpackaging method comprises the following steps that S1, drugs are extracted at the flow speed of 0.8 mL / s and used for rapidly establishing a stable flow field and inhibiting surfactant adsorption and bubble nucleation; s2, the flow speed is smoothly transited to 0.3 mL / s from 0.8 mL / s, and the medicine is extracted at the flow speed of 0.3 mL / s to be used for promoting breakage of generated bubbles; and S3, the medicine is extracted in a pulse mode, the pulse mode comprises extraction at the flow speed of 1.2 mL / s for 80 ms, then extraction is paused for 40 ms, and the pulse operation is repeated until the total subpackaging amount is completed so as to be used for flushing residual bubbles. The three-stage dynamic coupling flow velocity time sequence chain is adopted, so that full automation of bubble suppression is achieved, bubble control can be completed without interrupting the process, the continuity and reliability of subpackaging operation are effectively improved, and process interruption and operation accidents caused by bubbles are reduced.

A method for producing a security element (01) or a security document (02) having a printed image (27), in which several image elements (28) of the printed image (27) are formed by applying printing ink to a substrate (26), in which the previously applied printing ink is removed from at least one selected location of a selected image element (28) of the printed image (27) by means of a laser beam (66) emanating from a laser (63), wherein the laser (63) is operated in pulsed mode, characterized in that a gas laser is used as the laser (63), wherein the laser (63) is operated with a pulse duration in the range between 1 ns and 40 ns, wherein a structure with a width in the range between 0.25 µm and 1 µm is formed in the selected image element (28) of the printed image (27) with the laser beam (66).wherein the at least one image element (28) with the at least one area to be freed from printing ink is formed in white printing ink.

Provided is a method of forming a conformal film on a recess of a substrate in a reaction chamber by repeating a cycle comprising forming a first film comprising supplying a silicon source and a reactant and applying a first power from a power supply unit to the reaction chamber while supplying the silicon source and the reactant, treating the first film by applying a second power from the power supply unit to the reaction chamber while supplying the reactant, wherein the first power is applied in a pulsed mode, wherein the power supply unit comprises a matching network comprising electronically variable capacitors.

This invention discloses a high-speed blood flow Doppler measurement method and system for miniaturized ultrasound catheter probes. It employs a high-pulse repetition frequency complementary Golay-coded pulse sequence to replace continuous wave transmission, achieving a distance-dimensional information-discarding equivalent CW effect through extremely high PRF combined with range-gate coherent summation. Pulse compression processing gain is obtained through Golay BPSK encoding excitation. A pulse-by-pulse A / B alternating transmission strategy is used, with each physical pulse independently extracting Doppler samples using a matched filter corresponding to the codeword. Time-division multiplexing of pulse modes enables full-aperture transmission and reception, eliminating TX-RX acoustic leakage. This invention achieves a comprehensive signal-to-noise ratio gain of approximately 31 dB without exceeding the thermal load of traditional CW, restoring clinically usable CW equivalent Doppler spectra on ICE catheters, and can be implemented through firmware upgrades on existing PW Doppler hardware.

In certain embodiments, an ophthalmic laser system for treating a floater in a vitreous of an eye includes a laser device that directs laser pulses towards the floater to yield cavitation bubbles that create a bubble jet to treat the floater. In some examples, the laser device includes a beam multiplexer that splits a laser beam into multiple beams that form the cavitation bubbles that create the bubble jet. In some examples, the laser device directs laser pulses towards the floater according to a pulse pattern that forms the cavitation bubbles that create the bubble jet.

The invention discloses a carbon fiber composite material arrangement industrial visual analysis method and system, relates to the field of carbon fiber composite material arrangement industrial visual analysis, is used for improving defect identification accuracy, and comprises the following steps: obtaining image data and process parameters in a carbon fiber composite material laying process, image data is collected in a pulse mode illumination mode; determining a first judgment result according to multiple textural features of the image data; the texture features comprise regularity of fiber arrangement, local pattern distribution and detail information under different finesses; based on the continuity of the image data in time and the proximity of the image data in space, correlation analysis is carried out on abnormal features presented in the image data, and a second judgment result is determined; determining a third judgment result based on a preset relationship between the process parameters and the image features; and synthesizing the first judgment result, the second judgment result and the third judgment result to determine a final judgment result.

The invention discloses a protein gelation state differential modulation spectrum detection method, a sauce marinated product cooling method and an intelligent cooling system, and belongs to the technical field of food processing nondestructive detection and control. The method comprises the steps that near-infrared light beams with the wavelength range of 1000-2500nm are incident to a sample, meanwhile, low-frequency ultrasonic waves with the frequency of 20-100kHz are applied to the sample, the ultrasonic waves work in a pulse mode, and the pulse period and the spectrum collection period are synchronously locked; s2, phase-locked detection: adopting a phase-locked amplifier, taking the ultrasonic frequency as a reference signal, extracting a modulation component with the same frequency as the ultrasonic from the transmitted or reflected light signal, and obtaining a real part delta A '(lambda) and an imaginary part delta A' '(lambda) of a differential modulation spectrum. According to the method, the formation conditions of the hydrophobic-dominated and hydrogen-bond-dominated gels are accurately controlled, so that the quality of the sauced and marinated product is remarkably improved.

This application discloses a fiber laser, relating to the field of laser technology. The fiber laser includes a light source emitting module, an amplification module, and a frequency doubling module. The amplification module is located at the output end of the light source emitting module, and the frequency doubling module is located at the output end of the amplification module. The light beam emitted by the light source emitting module is a first composite beam, which has a continuous mode and / or a pulsed mode. The first composite beam includes a continuous beam and / or a pulsed beam. The first composite beam is amplified by the amplification module and then frequency-doubled by the frequency doubling module to output a second composite beam. The fiber laser of this application can output a second composite beam, which has the characteristics of dual wavelengths and dual operating modes, enriching the application scope of fiber lasers.