179 results about "Pulse injection" patented technology

A method for crest factor reduction of a multi-carrier signal is disclosed. The method comprises determining a plurality of signal values of a plurality of single-carrier signals prior to combining the plurality of single-carrier signals to form the multi-carrier signal. The method further comprises performing a joint potential peak detection on the plurality of signal values, producing a temporal position of a possible peak in the multi-carrier signal, generating a plurality of cancellation pulses, and injecting the plurality of cancellation pulses to the plurality of single-carrier signals at temporal injection positions which correspond to the temporal position of the possible peak in the multi-carrier signal. The single-carrier signals are then combined to form a crest factor reduced multi-carrier signal. A corresponding circuit and corresponding computer program product useable during manufacture and operation are also disclosed.

A compression ignition engine is supplied with a first fuel in a flow of air and a second fuel is injected into the combustion chamber. The first fuel comprises a more volatile fuel than diesel such as ethanol, LPG or other combustible gas; the second fuel comprises diesel or biodiesel; and the second fuel is injected in multiple pulses in each ignition cycle with the first pulse acting as a pilot pulse to trigger ignition, and the timing of the second pulse being such as to modify the temperature through evaporation of the second fuel and thereby reduce the combustion temperature and mitigate knock susceptibility. Preferably the pilot pulse is followed by a single further pulse of the second fuel in the ignition cycle. The engine may be controlled to operate in two different modes, one mode for light and medium load conditions when there is only a pilot pulse injection of the second fuel which reduces NOx and soot emissions, and the other mode for higher load conditions when there is a pilot pulse injection followed by a main pulse injection of the second fuel. The first fuel may comprise bioethanol and or one or more of the following: ethanol, butanol, propanol, lpg, natural gas, hydrogen.

A new pulsed multiple reaction monitoring process and system are disclosed that uses a pulsed ion injection mode for use in conjunction with triple-quadrupole instruments. The pulsed injection mode approach reduces background ion noise at the detector, increases amplitude of the ion signal, and includes a unity duty cycle that provides a significant sensitivity increase for reliable quantitation of proteins / peptides present at attomole levels in highly complex biological mixtures.

A circuit arrangement (1), a detection circuit (50, 70) and an LED driver circuit (100, 110) is disclosed for operating at least one lighting unit, such as an LED unit, with a phase-cut operating voltage. The circuit arrangement (1) comprising at least an input (6) for receiving a phase-cut operating voltage from said power supply and / or an output (7) for connection to said at least one lighting unit and a pulse injection circuit, configured to determine a phase-cut operation of said power supply and to draw a current pulse from said power supply within a delay time between 200-700 μs after said phase-cut operation to provide a stable operation of said LED unit with the phase-cut power supply. The detection circuit (50,70) comprises at least an input (6) for receiving a phase-cut operating voltage from said power supply and a lamp compatibility detector (52, 72), configured to determine the presence of a parallel lamp (57), connected in parallel with the detection circuit (50, 70) to said phase-cut power supply during operation and to provide a compatibility signal to a LED driver circuit (100, 110) corresponding to the determination of said parallel lamp (57), so that said driver circuit (100, 110) is set between a normal operating mode and a compatibility mode in dependence of the presence of said parallel lamp (57).

A system and methodology for control of a switched reluctance electric machine comprising: a switched reluctance electric machine including a sensor generating and transmitting a sensor signal indicative of an operating characteristic; a controller operatively coupled to the switched reluctance motor and the sensor; and the controller executing a method. The method comprises: probing a selected diagnostic phase with a pulse injection process; measuring an actual operating characteristic of the switched reluctance electric machine; computing an inductance based on the actual operating characteristic and correlating the inductance with a position to formulate an estimated position; modeling the switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of the estimated position, the observer-based estimated position, and a combination thereof to formulate a selected position of the switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.

A fuel injection apparatus with a piston device that includes a channel and a piston in the channel. A position sensor is used to detect the piston movement inside the channel when the fuel injection apparatus is energized and de-energized, and the sensing value is used for controlling fuel injection rate in real-time and diagnosing failures in the apparatus. With an actuator installed, the piston can also be used for independently modulating fuel pressure during fuel injection. Thereby the shape of fuel injection pulses is controlled. The fuel injection apparatus has three injection states, and flexible fuel injection timing and multi-pulse injection are allowed. Furthermore, in all injection states, fuel supply has no direct contact to combustion chamber. As a result, when a malfunction sticks the apparatus open, no fuel is supplied. This feature provides a safety nature to the fuel injection apparatus.

The invention discloses a method of detecting the initial position of a surface-mounted permanent magnet synchronous motor rotor. On the basis of realizing primary initial position estimation by using a high-frequency voltage injection method, and d-axis positive direction judgment is then carried out through extracting d-axis positive direction information in a direct current component responsive to d-axis current. Extra positive and negative pulse injection and current response amplitude comparison are not needed, the evaluation time is shortened, the evaluation process is simplified, tender moving of the rotor does not happen, and applications are broadened.

The present invention discloses an automatic disassembly and recovery device for electronic components of a waste printed circuit board (PCB), and belongs to the technical field of resource utilization of the electronic waste. The device comprises four parts of a material feeding flap valve, a continuous gradual temperature rising chamber, a pulse vibration disassembly chamber and a material discharging and valve flapping tower, wherein the four parts are connected to form a sealed integrity. A preheating conveying belt and a reflux cooling tube are arranged in the continuous gradual temperature rising chamber, and a gas exhaust outlet and a trap valve are arranged in the continuous gradual temperature rising chamber. The pulse vibration disassembly chamber is provided with a high temperature mesh conveying belt, a high temperature separation pulse injection tube, a vibration separator and a vibration separation screen, and is connected with the trap valve. A material discharging flap valve is connected with the pulse vibration disassembly chamber. Compared to the prior art, with the present invention, the superheated steam is adopted as the heating source; the vibration separation of the waste PCB and the electronic components of the waste PCB is realized through pulse injection of the superheated steam; the whole sealed design is adopted to realize the harmless automatic disassembly and separation of the waste PCB and the electronic components of the waste PCB.

The invention discloses a double-end cable oscillatory wave partial discharge locating system and method based on pulse injection. The double-end cable oscillatory wave partial discharge locating system comprises a master device, slave devices, analysis sub stations, an oscillatory wave voltage generation module and a pulse generation module, wherein the oscillatory wave voltage generation module and the pulse generation module are connected with one end of a power cable; the master device at least comprises a master device partial discharge collection module; the slave devices at least comprise slave device partial discharge collection modules; the analysis sub stations intercept partial discharge signals collected at the two ends of the power cable through the length of the power cable and the premeasured partial discharge propagation speed, acquire double-end signals at a same time base and the time difference through analysis of the double-end partial discharge signals, and conduct locating on partial discharge positions, wherein the time difference refers to the difference between the time that the partial discharge signals reach the master device and the time that the partial discharge signals reach the slave devices, and the partial discharge signals are generated by a same partial discharge source. By the adoption of the double-end cable oscillatory wave partial discharge locating system and method, the partial discharge points of long cables and short cables can be conveniently and accurately located at low cost.

The invention discloses a surface treated stainless steel band for buckle type lithium-ion battery shell and a preparation process thereof, applicable to the buckle type lithium-ion battery shell material. The invention adopts a 430 stainless steel band as a substrate, three layers of Ni multilayer film with different grain sizes are electroplated on one surface of the stainless steel substrate so as to optimize the performances of the plating, thereby obtaining a buckle type lithium-ion battery shell material with excellent corrosion resistance, stamping performance and electrical conductivity. The invention also provides a preparation process of the material, which comprises the following steps: degreasing and activating the 430 stainless steel band, electroplating a micron-crystalline nickel coating on one surface of the 430 stainless steel band through DC electroplating, electroplating a nano-crystalline nickel coating through pulse electroplating, then electroplating a nano-crystalline nickel coating through pulse injection, washing with distilled water, drying and finally dehydrogenating.

Disclosed is a method for processing a three-dimensional structure having a fine three-dimensional shape and a smooth surface is disclosed in which the three-dimensional structure is usable for an optical device.The process method comprises the steps of depositing a thin layer for absorption of laser light on a flat substrate; depositing a transparent layer on the thin layer for absorption of laser light; and irradiating a process laser light, passing through the transparent layer; in which pulse injection energy of the process laser light is set to be the same as or smaller than the maximum pulse injection energy capable of exposing a surface of the thin layer in front in the incident direction of the process laser light, and to be set the same as or greater than the minimum pulse injection energy capable of removing the transparent layer in rear in the incident direction of the process laser light.

A pulse amplitude modulation (PAM) signal generator that injects a copy of a pulse into the PAM baseband signal prior to frequency upconversion and power amplification. The pulse comprises a function of, or an extra copy of, a pulse in the PAM baseband signal. The pulse injector analyzes the PAM baseband signal for times when a predetermined threshold is exceeded and forms a pulse that is constructed and arranged to reduce the amplitude of the PAM baseband signal to a desired peak amplitude when the pulse is added to the PAM baseband signal. In other embodiments the peak-to-RMS amplitude ratio reducing methods and apparatus used to process PAM signal are adapted for reducing peak-to-RMS amplitude ratios of amplitude modulation signals in polar modulation transmitters. Peak-to-RMS amplitude ratio reduction is performed in the quadrature domain, the polar domain, or both the quadrature and polar domains.

The invention discloses a method for testing the maximum transient state of a high-voltage direct current transmission thyristor valve, belonging to the power electronic system field, wherein the synchronous voltage of the test is the input voltage of a big-current source; the working sequence of the test is determined by the sync signals; steps in a test cycle T include: triggering valves V1 and V2 at the time of t1 to perform the energy replenishment of a testing circuit and to simulate the dv / dt intensity for a test valve Vt under the working condition of the maximum transient state; triggering and conducting a valve V1 and a valve Vt at the time of t2; triggering a valve V21 at the time of t3 and performing the first pulse injection; performing the first current injection to the test valve by use of a capacitor C, with the valve V4 completing zero-crossing switching during a period from t3 to t4; triggering a valve 22 at the time of t4; triggering the valve V1 and the valve V21 at the time of t5; triggering the valve Vt and V21 and performing the second current injection at the time of t6; and triggering the a valve V22 at the time of t7.

The invention relates to a filtering bag type dust removal device, in particular to a filtering bag type dust removal device with a movable pulse injection and ash removal device. The injection device comprises a mobile table, a high-pressure air storage cylinder and an injection row, wherein the mobile table can translate back and forth along the plate surface of a horizontal partition plate; the high-pressure air storage cylinder and the injection row are arranged on the mobile table; a tube wall at the lower part of the injection row is provided with an injection port opposite to each filtering bag of a corresponding line; an electromagnetic pulse valve for controlling the switch-on / switch-off is arranged between the high-pressure air storage cylinder and an injection row communication pipe; a circuit control system comprises pressure air tube filters, a differential pressure adjustment compensator and a mobile injection differential pressure control assembly, wherein one of the pressure air tube filters is arranged in a lower air chamber to detect the real-time pressure; the differential pressure adjustment compensator is connected with the pressure air tube filters by a circuit; the pressure air tube filters are respectively installed at the positions of an upper air chamber and the lower air chamber and are connected with the differential pressure adjustment compensator; and the pressure situations at the positions of the upper air chamber and the lower air chamber are immediately transmitted to the mobile injection differential pressure control assembly to be monitored. The filtering bag type dust removal device can maximally save the consumption of compressed air and reduce the use cost.

The invention belongs to the technical field of brushless direct current motor control and relates to a high-frequency detection pulse injection method of a brushless direct current motor. The method is characterized in that a high-frequency source is utilized for generating high-frequency detection pulse signals, the high-frequency detection pulse signals are respectively coupled onto each phase of power supply wires and windings of the brushless direct current motor through a coupling circuit, each phase of end voltage values of the brushless direct current motor are detected through a voltage sensor, the high-frequency voltage components of each phase of end voltage are obtained from each phase of end voltage values respectively through a band-pass filter, position signals are obtained according to amplitude, phase position or instantaneous value differences of the high-frequency voltage components, and a controller realizes the non-position sensor control of the brushless direct current motor according to the position signals. The high-frequency detection pulse injection method has the advantages that the precision and the real-time performance of detecting signals can be improved, and the system cost is reduced.

The invention discloses a multi-pulse injection control method of a high-pressure common-ail diesel engine injector. An engine controller host CPU sends multi-pulse parameters to a parameter storage of a microcontroller through a structure array, the microcontroller directly generates optimized waves containing the main pulse width, the zero pulse width and maintain waves according to the structure array sent by the engine controller host CPU, and the power driving module of the injector is driven by the optimized waves. According to the multi-pulse injection control method of the high-pressure common-ail diesel engine injector, under the effect of optimized wave driving signals, in the start stage of the injector, power tubes in the driving units on the high side and the low side are switched on at the same time, a high-voltage power source carries out driving at the moment, the current rapidly increases to the peak value, and an injector solenoid valve is rapidly opened; after the injector solenoid valve is opened, the current in a solenoid valve coil L falls back through zero pulses, then, a low-voltage power source UL is used for driving, the open state is maintained through PWM maintain waves with the duty ratio ranging from 70% to 90%, oil is continuously injected, and the optimal control over the driving current of the injector is realized.

The invention discloses a pulse injection device which belongs to the technical field of the subcutaneous-administration device in the medical appliance. The pulse injection device comprises an ampoule mounted at the front end of a piezoelectric pulse push shot device and a drug storehouse. The ampoule comprises a cylinder body, wherein a minitype spray orifice is arranged at the front end part of the cylinder body, and an opening is arranged at the rear end thereof; a push rod is movably mounted in the cylinder body, and a piston is fixed at the front end of the push rod; and an interface which communicates with the drug storehouse is arranged on the front end wall of the cylinder body, and is positioned between the start position and the maximum stroke of the piston. The drug storehouse comprises a closed-type case body with a drug outlet, and a pressurizing system is mounted in the case body. A hose with a switch is sleeved between the drug outlet and the interface. The pulse injection device has the advantages of convenient drug fetch, high injection dosage, controllable injection depth, high injection dosage precision and controllable injection and drug release process.

The invention relates to the technical field of position sensorless control of switched reluctance motors, in particular to a position sensorless control method for three-phase switched reluctance motors based on pulse injection. The invention proposes a three-phase switched reluctance motor position sensorless control method based on pulse injection, which is suitable for the control of three-phase switched reluctance motors. Phase chopper control is performed, the phase current is detected by the current sensor, and the current slope difference is calculated. Then, the three-phase equivalent inductance is obtained according to the current slope difference, and the inductance vector is synthesized. Finally, the rotor position information is extracted from the inductance vector to obtain the rotor speed. The invention has the advantages of simple structure and easy realization, greatly reduced calculation amount, and high reliability and precision.

A system and method for identify that initial rotor position of permanent magnet synchronous motor in the field of motor is disclosed, the output of the pulse injection module is the pulse voltage component in the estimation coordinate system, the rotating high-frequency voltage injection module outputs the rotating high-frequency voltage in the stationary coordinate system, A magnetic pole position identification module and a magnetic pole polarity identification module are connected with each other at that output ends of the magnetic pole position identification module and the magnetic polepolarity identification module at the input end of the magnetic pole polarity compensation module. Only one pulse voltage signal needs to be injected, the polarity of magnetic pole can be distinguished by comparing the difference of inductance before and after pulse injection, Whether to compensate the position of the magnetic pole to obtain the initial position information of the rotor does not depend on the precision of the current sampling circuit. In the pulse injection process, the high-frequency injection signal need not be cut off, and the rotor can be directly started without positionafter the initial position of the rotor is accurately identified.

The invention discloses a whole blood autoluminescence immunoassay point-of-care test instrument. The instrument sequentially comprises an integrated reagent tube storing and fetching device, an automatic sampling device, an item group parallel reaction treatment device, a washing and substrate adding device and a photon detection counter. By the aid of the item group parallel reaction treatment device, test items of any patient can be parallelly operated, detected and reported quickly by means of item integrated cards, so that test efficiency is improved. By intelligent and automatic sample adding, indexes of each item group can be tested parallelly, so that sample adding time is saved. By onsite detection for filter pressing and washing, operations required by each integrated reagent of each item group are handled automatically, and accordingly test efficiency is improved. By pulsed injection of washing liquor for washing and continuous pump drainage of waste liquid, quickness in washing is achieved, and integral operating speed is increased. By matching of the instrument and the integrated reagents, blood cells can be well separated, point-of-care test of a whole blood sample can be realized, and suitableness for samples of whole blood, serum, plasma, other body fluids and the like is realized.

The invention relates to an electrified length measurement simulation system for a high voltage cable. The system comprises a high voltage test cable, a first coupler, a second coupler, a third coupler, a pulse injection module, a signal measuring module and a synchronizing signal detection module. The signal measuring module generates trigger pulse transmitted to the pulse injection module which receives the trigger pulse and outputs coded pulse to the synchronizing signal detection module to be received. The synchronizing signal detection module records the waveforms of the trigger pulse and the coded pulse on a time shaft and measures the electrified length of the high voltage test cable according to time and pulse spreading speed corresponding to the waveforms. In addition, the invention further provides a local discharge detection and positioning simulation system for the high voltage cable. According to the invention, the measuring process of the electrified length of the high voltage cable and the local discharge detection and positioning process are simulated with low simulation cost and high efficiency, so that the invention can be applied to various experimental platforms and training systems and is suitable for common popularization and use.

A coupling clamp-type pulse injection apparatus, which can couple a high-voltage wideband pulse having a peak voltage of several tens of kV and having a rising time of several hundreds of ps or less to a cable without causing dielectric breakdown and a 50 ohm impedance mismatch, is provided. The pulse injection apparatus includes an input connector, an output connector, and a main body including an inner plate connected at a first end thereof to the input connector and at a second end thereof to the output connector, and a coupling plate connected to the inner plate and configured to fix a cable to the inner plate and to couple a high-power electromagnetic pulse input through the input connector to the cable.

The invention discloses a water hammer eliminating control method. The water hammer eliminating control method includes the following steps that (1) a power source is connected, electric pump pressure is set, an electric pump is started by a controller; (2) a variable voltage and variable frequency module outputs a signal to a PWM output power module; (3) the PWM output power module outputs voltage to control the electric pump to conduct rotating speed adjustment; (4) a sampling module samples pressure sampling values of the electric pump before pulse injection and after pulse injection and conveys the values to an MCU processor; and (5) the MCU processor sets a comparison value, the MCU processor judges the absolute value of a difference value of the pressure sampling values of the electric pump before pulse injection and after pulse injection and a comparison value to correspondingly control the electric pump. By means of the water hammer eliminating control method, under the condition that a pressure tank is not needed, a water hammer in the system can be eliminated, the system cost and the follow-up maintaining cost can be reduced, the problem caused by using the pressure tank is solved, and the problem of water quality secondary pollution is solved.

The invention relates to the field of environment protection, in particular to an organic polluted site in-situ oxidation repairing system and technology. The system comprises a movable box type platform, a control system, an ozone system, a monitoring system and a hydrogen peroxide system. According to the method, a pressurizing pump is utilized for pulsed injection of the ozone and the hydrogenperoxide into a polluted area in batches, and organic matter pollutants are thoroughly degraded through the coordinated oxidization action between the ozone and the hydrogen peroxide. The organic polluted site in-situ oxidation repairing system and technology are mainly used for repairing polluted soil and underground water and have the beneficial effects that mobility is achieved, disturbance islittle, secondary pollution is avoided, rapidness and high efficiency are achieved, operation is simple, and cost is low.

The invention discloses a switch reluctance motor system based on double-bus split current sampling. On the basis of a traditional asymmetric half-bridge converter, an upper bus and a lower bus are split and connected, and two current sensors are adopted to respectively detect the current information of the upper bus and the current information of the lower bus. One bus current comprises current information of two phases, and the other bus current comprises current information of the other two phases. By combining the turn-on interval information of each phase winding, the excitation current in each phase conduction interval can be effectively obtained, and therefore current control is carried out. The excitation current of each phase winding in the turn-on interval can be detected by onlytwo current sensors, and the number of current sensors traditionally used is reduced by one half. According to the scheme, pulse injection is not needed for each phase and extra hardware equipment isnot needed. The excitation current of each phase can be obtained directly according to the double-bus sampling current and the turn-on information of each phase. The method is simple and reliable andis easy to implement.

A pulse injection bag dust cleaner which can avoid block, with a large ash hopper, comprises a large ash hopper, an ash transmitter arranged at the lower end of the large ash hopper and arranged with an ash discharge valve, a box on the upper end of the large ash hopper, a cleaning room separated by a porous figure pattern card at the upper end of the box, a pulse injector at the upper end of the cleaning room, a dust air inlet on one side wall of the box, a pure air outlet at one end of the cleaning room, an injecting tube in the cleaning room, communicated with a pulse valve of the pulse injector, and arranged with an ejector nozzle, and a filter bag in the hole of bottom figure pattern card of the cleaning room and arranged with a cage skeleton. The inner wall of the large ash hopper is mounted with an ash hopper insulated layer, while a heater is in the large ash hopper and an injection tube is fixed in the large ash hopper to communicate with an eject tube, while one end of the injection tube outside the large ash hopper is connected with an air canon whose another side is mounted with a pulse control valve and an electromagnetic valve.