270 results about "Pulse cycle" patented technology

An apparatus and method of growing a thin film onto a substrate comprises placing a substrate in a reaction chamber and subjecting the substrate to surface reactions of a plurality of vapor-phase reactants according to the ALD method. Non-fully closing valves are placed into the reactant feed conduit and backsuction conduit of an ALD system. The non-fully closed valves are operated such that one valve is open and the other valve is closed during the purge or pulse cycle of the ALD process.

A large number of irrigation system devices connected to a common two-wire cable can be powered and individually controlled from a central location by transmitting over the cable DC pulses of alternating polarity. Control information is conveyed by transmitting a command pulse train consisting of a series of pulses, separated by short no-power intervals, whose polarities indicate logic ones or zeros. Following a command pulse train, a selected watering station decoder acknowledges receipt of instructions by drawing current during a predetermined pulse of an alternating-polarity power pulse cycle, while a sensor decoder returns binary data by drawing current during one or the other of the alternating-polarity pulses of a series of power pulse cycles.

A pulsed welding regime includes a peak phase in which energy is added to an electrode and a weld puddle, and a molten ball begins to detach from the electrode, followed by a dabbing phase in which current is significantly reduced to place the ball in the weld puddle with addition of little or no energy. The resulting short circuit clears and the system proceeds to a background phase. The current in the dabbing phase is lower than the current during the background phase. The process may be specifically adapted for particular welding wires, and may be particularly well suited for use with cored wires. The dabbing phase allows for lower energy to be transferred to the sheath of such wires, and resets the arc length after each pulse cycle.

A cryogenic fluid jet is used in an apparatus and a method for remote cooling of a cutting tool engaged in machining a workpiece under high-energy conditions, such as high-speed machining, hard-turning, cutting of difficult to machine materials, and combinations thereof. The apparatus and method use a stabilized, free-expanding cryogenic fluid jet having a pulse cycle time less than or equal to about 10 seconds. The apparatus and method increase the cleanliness of machined parts and chips and machining productivity of hard but brittle tools, including but not limited to tools which should not be cooled with conventional cooling fluids.

The invention belongs to the technical field of fluorescence immunoassay and relates to a photon counting multi-channel time-resolved fluorescence immunoassay system which comprises a light source module, a detection module and a time marked photon counting analysis/control module. At the same time, the invention relates to a counting method adopted by the system. The counting method of exciting a sample to be detected with pulse light, sending a fluorescence signal generated by the sample after excitation into a PMT (Photo Multiplier Tube) photon counting head and outputting a pulse signal comprises the following steps of taking cycles of the excitation pulse light as counting cycles, dividing each counting cycle into a plurality of time intervals with the same width, accumulating photons detected after sending excitation light pulses of each counting cycle into a memory corresponding to a corresponding time window, that is marking the positions of the photons in the pulse cycles with the intervals where the time windows are located, and uploading data in the memory into an upper computer after counting for the cycles. The multi-channel time-resolved fluorescence immunoassay system is low in cost and has very high sensitivity.

The invention relates to a pulse rate measuring method and a ring type pulse rate measuring meter by adopting the method. In the method, a finger pulp is taken as the position for measuring a pulse signal, beam with specific wavelength is radiated to the skin surface of the finger pulp, a transmission and/or transmitted ray intensity signal is adopted through a photoelectric receiver, and the pulse rate can be calculated according to the alternating component of the intensity signal varying in pulse cycles. The ring type pulse rate measuring meter comprises a pulse wave collecting device and a pulse wave processing and displaying device, wherein a central control and signal processing module is arranged in the pulse wave processing and displaying device; and a control signal end of the central control and signal processing module is connected with the pulse wave collecting device in a wired or wireless mode. The ring type pulse rate measuring meter has the characteristics of simple structure, smart appearance and strong interference resistance, is convenient to wear, and can meet the wearing requirement of people in daily life health-care and daily exercise.

A sound producing apparatus is provided. The sound producing apparatus comprises a driving circuit, comprising a pulse amplitude modulation (PAM) module, configured to generate an driving signal according to an audio input signal, wherein the driving signal comprises a pulse amplitude modulated signal generated according to the audio input signal, the pulse amplitude modulated signal comprises a plurality of pulses at a pulse rate, two consecutive pulses among the plurality of pulses are temporally spaced by a pulse cycle, the pulse rate is a reciprocal of the pulse cycle, and the pulse rate is larger than a maximum audible frequency; and a sound producing device, coupled to the driving circuit, configured to produce sound according to the driving signal.

A method for filling a mold with a compressible liquid material is disclosed. The mold is connected to a manifold via a plurality of runners, with at least one valve disposed in at least one of the plurality of runners. A controller is configured to pressurize the manifold with the liquid material, and modulate the at least one valve to perform a plurality of pulse cycles during one filling cycle of the mold. A pulse cycle includes adjusting an aperture of the valve from a first position to a second position, and adjusting the aperture of the valve from the second position to a third position, where the aperture corresponding to the second position is larger than the aperture corresponding to the first position, and the aperture corresponding to the third position is smaller than the aperture corresponding to the second position.

An electro-optical device copes with a decreased size of a pixel pitch by using a comparatively simple configuration in which a driving circuit system is formed on one substrate. In a scanning-line driving circuit, each transfer signal of a shift register is branched off into three signal components, and an enable circuit is provided for each signal component. During a pulse cycle of the transfer signal, one transfer signal is divided into three components while being sequentially shifted in the time domain in accordance with enable signals whose phases are sequentially shifted from each other, and the divided components are output as scanning signals. The same applies to a data-line driving circuit.

A pulsed welding regime includes a peak phase in which energy is added to an electrode and a weld puddle, and a molten ball begins to detach from the electrode, followed by a dabbing phase in which current is significantly reduced to place the ball in the weld puddle with addition of little or no energy. The resulting short circuit clears and the system proceeds to a background phase. The current in the dabbing phase is lower than the current during the background phase. The process may be specifically adapted for particular welding wires, and may be particularly well suited for use with cored wires. The dabbing phase allows for lower energy to be transferred to the sheath of such wires, and resets the arc length after each pulse cycle.

The invention discloses a pulse-combustion control method of a steel rolling heating furnace, namely at least four gas nozzles are arranged at the two sides of the heating furnace and located at the upper and lower parts of blanks in the blank along the length direction of the oven, thus whole-side-burning is formed for the heating furnace, the pulse of opening and closing of the whole gas nozzles is finished in T time and T is taken as a cycle period, each gas nozzle is opened at Ts interval successively, the quantity of the gas nozzles is N, thus in a pulse cycle period Ts=T/N, each gas nozzle open pulse order is set as required and opened by rated heating efficiency, each gas nozzle open pulse time is T1, T2...TQ, and the each gas nozzle open pulse time T1, T2... and TQ are calculated by the PID controller of the heating furnace control system according to the set value and the measured value of the furnace temperature. The pulse-combustion control method provided by the invention has the advantages of improving the furnace-shape, balancing the workload of the gas nozzle, improving fuel burn-off rate, strengthening the heat transfer efficiency of the blank, saving the fuel loss and improving control accuracy and flexibility of the furnace temperature, and is convenient in maintain and operation.

A device removes first pulses in a pressure signal of a pressure sensor which is arranged in a fluid containing system to detect the first pulses, which originate from a first pulse generator, and second pulses, which originate from a second pulse generator. The first pulse generator operates in a sequence of pulse cycles, each pulse cycle resulting in at least one first pulse. The device repetitively obtains a current data sample, calculates a corresponding reference value and subtracts the reference value from the current data sample. The reference value is calculated as a function of other data sample(s) in the same pressure signal. The fluid containing system may include an extracorporeal blood flow circuit, e.g. as part of a dialysis machine, and a cardiovascular system of a human patient.

In accordance with an AC pulse arc welding method, a periodic welding current is applied, that includes, for a pulse cycle, negative current in electrode negative polarity and positive current in electrode positive polarity. Then, a negative current rate is set by a negative current rate setting value, where the negative current rate represents the ratio of the negative current to the welding current for the pulse cycle. Then, a feeding speed of welding wire as a consumable electrode is set by a feeding speed setting value. The method further includes: setting an average of the welding current by a welding current setting value; and performing automatic calculation of the feeding speed setting value by using a predetermined conversion function based on input of the welding current setting value and the negative current rate setting value.

The present invention relates to a monitoring method, in particular to a low altitude target monitoring method. According to the present invention, a phased array radar antenna of which the pre-elevation angle is plus 15 degrees is used, in each pulse cycle of the antenna azimuth mechanical scanning, 8 beams of progressive full-covering electric scanning radar wave pulse signals of which the pre-elevation angles are between minus 15 degrees and plus 15 degrees are emitted out orderly relative to the normal direction of the phased array radar antenna, and according to an echo signal of a radar, the space coordinates of an object relative to the radar are detected. The monitoring method of the present invention can search and track the aerodynamic objects in the low-altitude airspace of which the altitudes are 3000 meters or less, such as the miniature airplanes, the paragliders, the unmanned aerial vehicles, etc., realizes the low-altitude blind compensation to the remote air traffic management primary radar, and forms the three-coordinate motion situation of the low-altitude objects.

The invention comprises the following steps: detecting whether a meter checking order exists; if yes, executing the next step, and if not, returning to the previous step; judging whether the order is an initial adjustment order; if so, executing the early adjustment meter checking; if not, then re-detecting; the early adjustment meter checking comprises the following steps: reading the power value P1 transmitted by a power meter, calculating the meter checking pulse cycle T according to the equation: T is equal to 3600/(P1 multiplying Cl), wherein, C1 is a pulse constant and is a fixed value set on the power meter; reading the cycle T1 of the high-frequency pulse outputted by a measurement circuit; calculating the high-frequency pulse dividing frequency K of the measurement circuit, according to the equation: K is equal to T/T1; and dividing the frequency based on the high-frequency pulse dividing frequency K so as to obtain the meter checking pulse. The invention eliminates the adjustable resistor network and reduces the hardware costs, which can greatly improve the meter checking efficiency, reduce labor intensity, realize fully automated operation and achieve more precise calibration.

The invention provides a novel and reliable feedback control circuit. A feedback signal is discretized and modulated into narrow pulse, the narrow pulse is fed back to the primary side of an isolation power supply, and a primary side circuit detects the narrow pulse to generate a proper feedback signal used for the closed loop control of a PWM (Pulse-Width Modulation)/PFM (Pulse Frequency Modulation) master control circuit. The novel and reliable feedback control circuit has the beneficial effects that secondary side feedback and master side control under magnetic isolation are realized. Compared with a modulation way of PSM (Pulse cycle Skip Modulation), the novel and reliable feedback control circuit improves steady-state performance under a condition that the dynamic performance of the power supply is not lowered, lowers low-frequency ripple, improves a load regulation rate, reduces the volume of a magnetic isolation transformer and simplifies a feedback process while the volume of the magnetic isolation transformer is reduced and power consumption is lowered. Since a master side control synchronous rectifier is opened, convenience is brought for realizing synchronous rectification and improving reliability. At the finishing moment of the synchronous rectification, output voltage is sampled, and sampling precision is improved.