479 results about "Impulse generator" patented technology

The invention relates to the technical field of cylindrical lithium ion battery production, and discloses a method for detecting insufficient welding of a cylindrical lithium ion battery, and the method comprises the following steps: S1, appearance inspection; s2, initial internal resistance benchmark test; s3, applying a short-time large-current pulse to the battery by using a pulse generator, simulating an actual load condition, and recording an instantaneous voltage drop and current response curve of the voltage of the battery end during the pulse period; s4, performing infrared thermal imaging identification and data processing; s5, learning the picture and establishing a model; s6, comparing the test picture and the data with the model; s7, dynamic internal resistance calculation; s8, cold solder joint query and sorting processing; and S9, retesting the electrical performance. According to the invention, the technologies of dynamic internal resistance measurement, nondestructive X-ray or ultrasonic detection, rate discharge test and the like are adopted, so that efficient, accurate and nondestructive detection of the cold solder joint of the cylindrical lithium ion battery is realized, and the production efficiency and the detection precision are remarkably improved.

The present disclosure provides an implanted nerve stimulator electrode for an implanted nerve stimulation system, the implanted nerve stimulator electrode being adapted to be at least partially implanted into a human body and receiving an electrical signal from an implanted pulse generator to apply electrical stimulation to the human body. An implanted nerve stimulator electrode includes an elongate body, a plurality of wires, and at least one nerve stimulation contact structure. The nerve stimulation contact structure is in a hollow sleeve shape and is suitable for being arranged on the main body in a sleeving mode. Each nerve stimulation contact structure comprises at least two contacts, and when the nerve stimulation contact structures are arranged on the main body in a sleeving mode, each contact on the nerve stimulation contact structure is electrically connected with one corresponding wire. After the nerve stimulation contact structure provided by the invention is sleeved on the main body, an operator can weld the corresponding wire to the contact under the condition of no shielding or little shielding, so that the welding difficulty from the contact to the wire is reduced. And the production efficiency is improved.

The invention provides a pulse field ablation system based on impedance dynamic feedback and a use method thereof, and the system comprises a pulse generator module which is used for generating a voltage pulse required by pulse field ablation; the ablation catheter module comprises a plurality of ablation electrodes and is used for transmitting the voltage pulses to the to-be-ablated heart tissue, and the activation modes of the ablation electrodes are determined according to the depth and range of the to-be-ablated heart tissue; the impedance detection module comprises an impedance sensor and is used for dynamically detecting electrical impedance in different ranges in the ablated heart tissue; the system control module is used for dynamically adjusting the voltage pulse generated by the pulse generator module, the activation modes of the plurality of ablation electrodes and the detection range of the impedance sensor according to different ranges of electrical impedance in the ablated heart tissue; and the visual interface interaction module is used for displaying the ablation process and serves as an operation interface of the ablation process. According to the invention, the assessment capability of the ablation effect can be improved, and the accuracy and success rate of the ablation process are ensured.

The invention is suitable for the technical field of power system high-voltage electrical equipment test, and provides a high-voltage circuit breaker direct test loop parameter setting method based on a particle swarm optimization algorithm, and the method comprises the steps: enabling a three-phase direct test loop to be equivalent to a single-phase loop according to symmetry, and enabling a transformer, an electric reactor, a power grid or an impact generator to be equivalent to an inductor and a voltage source; establishing an equation set according to the KCL, the KVL and element characteristics; performing nondimensionalization by using the voltage and current standard values and the conversion relation between the time domain and the angle domain to obtain a dimensionless equation; sorting to obtain a differential equation of per unit values of voltages at two ends of the circuit breaker and dimensionless parameters; and constructing an optimization search space and value function by taking the dimensionless parameters as decision variables of a particle swarm optimization algorithm, and operating the algorithm for multiple times to obtain the optimal dimensionless parameters so as to complete loop parameter setting. According to the scheme, test loop parameter setting can be automatically completed, manual debugging is reduced, the setting efficiency and precision are improved, and it is guaranteed that a circuit breaker test result meets the standard.

A lithotripsy device for tunneling through vascular occlusions comprises a tunneling catheter including a tunneling catheter shaft having a distal end and a proximal end. A tunneling probe is disposed on the distal end of the tunneling catheter shaft. The tunneling probe has a pair of electrodes; each electrode being operatively connected to an electrical lead within the tunneling catheter shaft. The leads are configured for operative connection to an external pulse generator. Activation of an external pulse generator operatively connected to the leads causes repeated electrical discharges between the electrodes. When the electrodes are an in a fluid, the repeated electrical discharges produce repeated hydraulic shock waves in the fluid directed away from the electrical discharges. When the repeated hydraulic shock waves strike calcified tissue, the calcified tissue is broken into a modified plaque. The modified plaque has a lower resistance to mechanical dislocation that the original calcified tissue.

A ripple voltage detector circuit comprises a pulse generator, a direct current-to-direct current (DC-DC) converter coupled to the pulse generator, and a first control loop coupled to the pulse generator and the DC-DC converter. The first control loop is configured to measure an output voltage of the DC-DC converter, determine an output ripple voltage of the output voltage, determine a ripple coefficient based on the output ripple voltage, determine a reference peak inductor current based on the ripple coefficient, and determine a peak value of an inductor current during a switching cycle, and transition a switching state of the DC-DC converter based on the reference peak inductor current and the peak value of the inductor current.

The invention relates to a device for performing electric field treatment on a digestive tract. The device comprises a catheter, a support body, an electrode array film and a pulse generator, the pulse generator comprises a current sensor for sensing current flowing through the electrode pair; in the initial time period, the voltage amplitude of the back pulse in the first sequence of pulse waves is larger than the voltage amplitude of the front pulse, and when the current sensor senses that the current is equal to or exceeds the lower limit value IS (MIN) of the set range, the absolute value US of the voltage amplitude of each pulse in the second sequence of pulse waves is equal in the next time period. The amplitude of the output voltage of the pulse generator is controlled through feedback of the current sensor, and the therapeutic instrument is safer for a human body during treatment.

The utility model discloses a mud pulse generator driven by a motor. The mud pulse generator is used for extracting signals of an inclinometer while drilling. Comprising a main valve head assembly and a servo assembly, the servo assembly comprises a screen drum and a valve seat arranged in the screen drum, a valve sleeve is arranged at a mud channel of the valve seat, the valve sleeve and a servo valve rod are oppositely arranged, and the servo valve rod can move to be seamlessly attached to the valve sleeve; a servo valve rod is connected with a ball screw nut, a hexagonal shaft sleeve on a ball screw shaft is connected with a speed reducer, the speed reducer is connected with a fixing seat assembly, and the periphery of the fixing seat assembly is sleeved with an outer rotor assembly. The outer rotor assembly is connected with the motor short section and is driven by the motor. The motor is used for driving, so that rigid collision between the servo valve rod and the valve sleeve can be effectively avoided, abrasion between the servo valve rod and the valve sleeve is reduced, and the service life of the servo valve rod and the valve sleeve is prolonged.

The invention provides a feed-through device, which is applied to a pulse generator and comprises a main body, at least one feed-through pin and a plurality of first electromagnetic shielding layers. The first electromagnetic shielding layers are integrally formed on the main body, and the multiple first electromagnetic shielding layers are stacked and arranged at intervals. Each feed-through pin passes through all the first electromagnetic shielding layers along the first direction, and the feed-through pin is isolated from any one of the first electromagnetic shielding layers. According to the feed-through device provided by the invention, the plurality of stacked first electromagnetic shielding layers are provided, so that a part of electromagnetic waves penetrating through the first electromagnetic shielding layer of the first layer can be absorbed or guided out by the first electromagnetic shielding layer behind in the processes of reflection, diffraction and the like; or is reflected or diffracted to be absorbed or led out by the upper first electromagnetic shielding layer again. The amount of electromagnetic waves passing through the current first electromagnetic shielding layer is greatly reduced compared with the amount of electromagnetic waves passing through the first electromagnetic shielding layer.

The present invention belongs to the technical field of logging-while-drilling instruments, and discloses a large-size high-speed shear valve type mud pulser capable of improving transmission rate and displacement. It includes a vortex generator drill collar with an internal turbine generator, a circuit drill collar with an internal instrument circuit, a pulser drill collar with an internal pulse generator, and a hard connection drill collar with an internal hard connection. At both ends of the circuit skeleton in the circuit drill collar, an upstream flow channel converter connected to the turbine generator and a downstream flow channel converter connected to the pulse generator are respectively connected. The pulse generator includes a motor housing connected to the downstream flow channel converter, a motor stator fixed therein, a motor rotor located inside the motor stator, a torsion shaft connected to the motor rotor, a shear valve connected to the torsion shaft, and a shear valve plate connected to the motor housing and arranged in parallel and spaced apart from the shear valve. The torsion shaft at least includes a fixed section axially passing through the motor rotor and connected to the motor housing, a torsion section axially penetrating and suspended inside the motor rotor, and a shear valve installation section connecting the shear valve.

The invention relates to a hub carrier assembly (1) for a motor vehicle, comprising a hub carrier (2) and a wheel bearing (3) for mounting a wheel hub (4) on the hub carrier (2) for rotation about a wheel-hub axis of rotation (5), wherein a seal (14) which sealingly interacts with a pre-sealing element (15) is arranged between an inner ring (6) and an outer ring (7) of the wheel bearing (3). According to the invention, the pre-sealing element (15) surrounds the outer ring (7) of the wheel bearing (3) and carries a pulse generator (24) of a rotational speed measuring device on a side of the outer ring (7) which is remote from the inner ring (6).

A pulse generator is disclosed. The pulse generator includes a DC source; a plurality of switches, a transformer; and a pulsing output. The pulse generator can be coupled with a plasma chamber. The pulsing output outputs high voltage pulses having a peak-to-peak voltage greater than 1 kV and a voltage portion between consecutive high voltage bipolar pulses that has a negative slope that substantially offsets the voltage reduction on a wafer within a plasma chamber due to an ion current. The resulting voltage at the wafer may be substantially flat between consecutive pulses.

A high-voltage pulse generation device configured to apply a pulsed high voltage to the space between a pair of discharge electrodes disposed in a laser chamber of a gas laser apparatus includes n transformer cores that form a transformer, where n is a natural number greater than or equal to two, n primary electric circuits of the transformer, the n primary electric circuits each having a first terminal connected to a reference potential and a second terminal connected to a charger, the n primary electric circuits each including one or more primary coils, one or more diodes connected in parallel to the one or more primary coils, and one or more pulse generators connected in parallel to the one or more primary coils, and a secondary electric circuit of the transformer, the secondary electric circuit including a secondary coil and connected to the pair of discharge electrodes.

Systems and methods for electroporation are provided. An electroporation system includes a catheter assembly including a first electrode, a second electrode, and a pulse generator coupled to the first and second electrodes. The pulse generator is configured to apply a waveform between the first and second electrodes to perform irreversible electroporation, wherein the waveform includes pulses having a voltage amplitude of 1000 Volts (V) or less and an effective pulse width of 10 microseconds (μs) or more.

A pulse generator is disclosed. The pulse generator includes a DC source; a plurality of switches, a transformer; and a pulsing output. The pulse generator can be coupled with a plasma chamber. The pulsing output outputs high voltage pulses having a peak-to-peak voltage greater than 1 kV and a voltage portion between consecutive high voltage bipolar pulses that has a negative slope that substantially offsets the voltage reduction on a wafer within a plasma chamber due to an ion current. The resulting voltage at the wafer may be substantially flat between consecutive pulses.

A control circuit of a timepiece motor (2), including a bipolar permanent magnet (6), a stator (4) defining two isthmi (12a &12b) and two rest positions for the rotor, and a coil (18) mounted on the stator. The control circuit can determine the position of the rotor at rest. An electric pulse generator (22) for detecting an external magnetic field formed by a circuits for: measuring the electrical current in the coil after an electrical pulse has been triggered, comparing the measured electrical current with a reference current, measuring the time allowing measuring a rise time between triggering of the electrical pulse and the next time the electrical current flowing in the coil reaches the reference current, and processing the rise time to be able to determine whether the measured rise time indicates the presence of a given external magnetic field passing through the two isthmi.

A high frequency chest wall oscillation therapy system includes an air pulse generator. The air pulse generator includes control circuitry and a fluid chamber carrying a fluid. A motor is configured to generate compression and expansion of the fluid in the fluid chamber to generate pressurized fluid. A pressure sensor detects a pressure of the pressurized fluid in the fluid chamber. A garment includes at least one fluid bladder defining a pressurizable chamber adapted to receive the pressurized fluid from the fluid chamber to provide a force of high frequency pressure oscillation to a patient's chest wall.

A pulse generator according to an embodiment of the present invention comprises: a pulse DC generator for providing a pulse DC waveform to a capacitively coupled load; a step waveform generator for providing a step waveform to the capacitively coupled load and which is connected in parallel with the pulse DC generator; and a control part for controlling the pulse DC waveform of the pulse DC generator and the step waveform of the step waveform generator. A waveform applied to the capacitively coupled load comprises a first decrease section in which the voltage decreases from a positive voltage to a negative first voltage, a first maintaining section in which the voltage is maintained at the negative first voltage for a predetermined time, a second decrease section in which the voltage decreases from the first voltage to a second voltage, and a second maintaining section in which the voltage is maintained at the second voltage.

To provide a technique capable of improving an in-plane uniformity of a substrate in plasma processing. A plasma processing apparatus includes a plasma processing chamber; a substrate support; a substrate chuck electrode; at least one ring chuck electrode; a substrate bias electrode; a ring bias electrode; a first voltage pulse generator; a second voltage pulse generator; and a switch configured to switch between a first connection state and a second connection state, the first connection state being a state where the first voltage pulse generator is electrically connected to the substrate bias electrode and the second voltage pulse generator is electrically connected to the ring bias electrode, and the second connection state being a state where the first voltage pulse generator is electrically connected to the ring bias electrode and the second voltage pulse generator is electrically connected to the substrate bias electrode.

Systems, devices, and methods for stimulating peripheral nerves in the fingers or hand to treat tremor are described. For example, a wearable ring device for delivering electrical stimulation to sensory nerves in a patient's finger can include an annular ring having a plurality of electrodes and a detachable unit having a power source and a pulse generator.

The cyclical suction system generates an intermittent cyclically spaced cyclical suction pressure waveform of a vacuum pressure below atmospheric pressure and a positive pressure above the vacuum pressure. The system includes a flexible inlet tubing connected in fluid communication between a vacuum pump and a suction conduit. A positive pressure pulse generator mechanism intermittently cyclically applies an external force that compresses the segments of the flexible inlet tubing, thereby reducing the internal volume and displacing fluid that can be collected therein, thereby generating positive pressure pulses. Upon withdrawal of the applied external force, the flexible inlet tubing is configured to be able to be forced to return to an uncompressed state, thereby increasing the internal volume while reducing pressure therein until the vacuum pressure ultimately regenerates, thereby minimizing return time and maximizing cycle frequency.

The present invention discloses a dual-pulse test system, which is configured to include: a load inductor, a test power supply is connected to a power device under test through the load inductor; a first freewheeling device, after the power device under test is tested, it forms a freewheeling loop with the load inductor; a pulse generator, which is used to provide the dual pulses required for testing the power device under test; and a failure protection circuit, when the power device under test is in a failure state, it cuts off the test power supply and constructs a freewheeling loop to make the loop current no longer increase. The present invention is configured with a failure protection circuit, which can timely cut off the power supply when the power device under test is in a failure state, and can form a freewheeling loop to realize that the loop current no longer increases, preventing the device from being burned out due to the failure of the power device under test, and playing a protective role.

The application discloses a mandarin fish domestication pool, which comprises a pool body, wherein an oxygenation device, a water inlet and a water outlet are arranged in the pool body, a bait fish breeding frame is arranged below the water inlet, and a feeding device is arranged on the side of the bait fish breeding frame; the feeding device comprises a feeding pipe, a bait temporary storage tank arranged on the upper end of the feeding pipe, a feeding hopper arranged on the upper end of the bait temporary storage tank, cathode ring pieces and anode ring pieces arranged in the feeding pipe, and a pulse generator and a pulse power amplifier connected through wires. The domestication pool is improved, so that live fish feeding, live fish and dead fish or feed proportionate feeding are facilitated, and switching and adjustment are facilitated, thereby improving the convenience and success rate of domestication.

The invention provides a charging control method of an in-vitro charger and a related device. The in-vitro charger is used for charging a stimulator implanted in the body of a patient. The charging control method comprises the following steps: acquiring first posture information of the patient through the in-vitro charger; according to the first attitude information, whether charging parameters of the in-vitro charger need to be adjusted or not is judged, and the charging parameters comprise one or more of resonance voltage, resonance frequency, resonance matching capacitance, coil position parameters and coil angle parameters; when the charging parameters of the in-vitro charger need to be adjusted, the charging parameters of the in-vitro charger are updated according to the first posture information. By acquiring the first posture information and correspondingly adjusting the charging parameters, the pulse generator of the patient can be efficiently charged in different postures.

There is provided a plasma processing apparatus comprising: a plasma processing chamber; a substrate support disposed in the plasma processing chamber, the substrate support including: a base, a ceramic member disposed on the base and having a substrate support surface and a ring support surface, one more annular members disposed on the ring support surface to surround a substrate on the substrate support surface, first and second central electrodes inserted into the ceramic member, first to fourth vertical connectors inserted into the ceramic member, first and second annular connectors inserted into the ceramic member, and a central heater electrode inserted into the ceramic member; a DC power source electrically connected to an outer region of the first annular connector through the third vertical connector; and a voltage pulse generator electrically connected to an outer region of the second annular connector through the fourth vertical connector.

The cyclical suction system produces an associated cyclical pressurization waveform of intermittent cyclical intervals of a vacuum pressure below atmospheric pressure and a positive pressure above the vacuum pressure. The system includes a vacuum pump that generates a vacuum pressure, a conduit connected in fluid communication to the vacuum pump, and a suction conduit connected in fluid communication to the conduit. Associated with the conduit is a positive pressure pulse generator mechanism that controls the vacuum pressure generated by the vacuum pump through the conduit via the vacuum pressure gating device and cyclically generates positive pressure pulses intermittently.

The embodiment of the invention discloses a sealing detection method and device for an implantable pulse generator and a storage medium, and the method comprises the steps: obtaining internal gas parameters of the implantable pulse generator implanted into a user body, and the gas parameters comprise a gas pressure parameter and a gas component parameter; and determining the sealing state of the implantable pulse generator according to the gas parameter and the gas parameter threshold. By adopting the technical scheme, the sealing condition of the implantable pulse generator is detected in real time, the timeliness and accuracy of the sealing detection of the implantable pulse generator are ensured, and the adverse effect on the body of a patient caused by the sealing failure of the implantable pulse generator is avoided.

A mud pulse telemetry system is disclosed including a drill string positioned within a wellbore, a restriction positioned within the drill string and configured to create a pressure differential between a high pressure region and a low pressure region of the drill string, a piston including a piston opening positioned within a piston chamber and movable along an axis between a first position and a second position, a valve movable to selectively open the piston opening, and a pulser coupled to the piston and positioned for movement within the drill string along the axis. The pulser includes a pulser body having at least a portion thereof with a non-linear profile and a conduit extending through the pulser body and facilitating fluid communication between the drill string and the piston chamber. Movement of the pulser body generates a pressure wave through mud within the drill string.

Drilling mud is passed through a valve assembly set at a particular opening amount, mud flow rate and force applied by the drilling mud to a portion of the valve assembly are measured, and density of the drilling mud is estimated based on historical data. Historical data is generated by directing multiple flows through the valve assembly, where the flows are at different flow rates, and at each flow rate, different drilling fluids having different densities are directed through the valve assembly. For each flow, the valve assembly is adjusted to a different amount of opening, and a respective force exerted on the valve assembly by the flow is measured. An example of the valve assembly is a mud pulse generator having a plug member engaged with an orifice opening, a sensor in the pulse generator measuring a force applied by the mud flow.

This invention discloses a high-viscosity heavy oil heat exchanger based on a spin-flow tortuous tube, comprising a shell, tube-side inlet and outlet, and shell-side inlet and outlet; a heat exchange tube bundle connected between the tube-side inlet and outlet, the heat exchange tube bundle being composed of multiple U-shaped spin-flow tortuous tubes arranged side by side; each spin-flow tortuous tube includes a tortuous tube inlet, a spiral guide rib, a tortuous tube outlet, and a vibration-damping support ring, the spiral guide rib being disposed on the inner wall of the vibration-damping support ring, the pitch of the spiral guide rib increasing linearly along the heavy oil flow direction; multiple baffles are uniformly arranged circumferentially on the heat exchange tube bundle, each baffle having multiple tube holes, the spin-flow tortuous tubes passing through the tube holes of the baffles and fitting with the clearance; an online cleaning device is installed on the shell, the online cleaning device monitoring the scaling condition through an acoustic wave monitor, and the control unit controlling a pulse generator to emit pulse waves to clean the scaling. This invention can achieve efficient and stable heat exchange of high-viscosity heavy oil under low energy consumption conditions, while simultaneously solving the performance degradation problem caused by scaling through an intelligent cleaning system.