31 results about "Oscillatory power" patented technology

A cutting saw blade for use with an oscillatory power tool used in surgical bone cutting procedures including a blade having a distal end provided with teeth whose tips are located on a tangent line perpendicular to the long axis of the blade. The teeth are configured substantially as right triangles with their hypotenuses facing either towards the center of the blade or away from the center of the blade. A central tooth can be optionally provided. The surgical saw blade may have a distal end having at least one pair of teeth configured to be adjacent to each other and each of the pair of teeth is configured as a right triangle each having a hypotenuse which is oriented at least one of towards and away from the centrally positioned long axis.

A cutting saw blade for use with an oscillatory power tool used in surgical bone cutting procedures including a blade having a distal end provided with teeth whose tips are located on a tangent line perpendicular to the long axis of the blade. The teeth are configured substantially as right triangles with their hypotenuses facing either towards the center of the blade or away from the center of the blade. A central tooth can be optionally provided.

A cutting saw blade for use with an oscillatory power tool used in surgical bone cutting procedures including a blade having a distal end provided with teeth whose tips are located on a tangent line perpendicular to the long axis of the blade. The teeth are configured substantially as right triangles with their hypotenuses facing either towards the center of the blade or away from the center of the blade. A central tooth can be optionally provided. The surgical saw blade may have a distal end having at least one pair of teeth configured to be adjacent to each other and each of the pair of teeth is configured as a right triangle each having a hypotenuse which is oriented at least one of towards and away from the centrally positioned long axis.

A hand-held power tool includes a motor mounted in a housing, with a two-axis universal joint mounted to the housing and supporting a rotary chuck. The universal joint includes a yoke mounted to the housing and a hub mounted to the yoke, the hub supporting the chuck. First and second clutches are provided for locking the yoke and the hub. A locking mechanism operatively connects the first and second clutches, and releases both of the first and second clutches simultaneously. A quick release chuck includes a spindle having a longitudinal bore for accepting a shank. A ball or like engaging device is disposed in a radial bore, extending into the longitudinal bore, and radially movable so that at least a portion of the ball extends radially into the longitudinal bore to engage a recess in the shank. A spring biased outer collar disposed about the spindle is movable longitudinally relative to the spindle and has a tapered face for forcing the ball into an aperture. A spring biases the collar into a locking position.

A surgical saw blade operatively couples to an oscillatory power tool for oscillation about an oscillation axis (OA). The saw blade includes a plurality of cutting teeth separated from one another by a clean out opening along a distal end. The clean out opening comprises an arcuate closed end and straight side walls extending from the closed end. Each tooth comprises first and second rake surfaces and first and second relief surfaces intersecting to define first and second cutting edges, respectively. The first and second cutting edges are oppositely disposed from one another. One cutting tooth protrudes a distance (de) from one side face of the blade and the next adjacent cutting tooth protrudes the same distance (de) from the other side face of the blade to cut a groove having a width (dg) wider than the thickness (t) of the blade.

The invention discloses a portable tool having a housing with a gearhead, having a motor shaft which can be rotationally driven by a motor and which can be coupled via an eccentric coupling drive to a tool spindle for the drive thereof, wherein the tool spindle can be driven in a rotational oscillatory manner about the longitudinal axis thereof and is configured for accommodating a tool, wherein a motion-reversal drive is provided which is configured for converting an oscillating drive movement produced by the eccentric coupling drive into an oscillating output movement which has a direction of oscillation opposed to said drive movement. The motion-reversal drive is configured as an epicyclic gearing.

The invention discloses a portable tool having a housing with a gearhead, having a motor shaft which can be rotationally driven by a motor and which can be coupled via an eccentric coupling drive to a tool spindle for the drive thereof, wherein the tool spindle can be driven in a rotational oscillatory manner about the longitudinal axis thereof and is configured for accommodating a tool, wherein a motion-reversal drive is provided which is configured for converting an oscillating drive movement produced by the eccentric coupling drive into an oscillating output movement which has a direction of oscillation opposed to said drive movement. The motion-reversal drive is configured as an epicyclic gearing.

A densifier is provided which in one embodiment can simultaneously densify two cryogenic liquids at different temperatures. The densifier has an oscillatory power source for generating oscillatory power and a two stage pulse tube refrigerator. The oscillatory power source can be a thermoacoustic heat engine or a mechanical oscillatory power source such as a linear flexure bearing compressor. The first stage densifies a first cryogenic liquid to a first cryogenic temperature, and the second stage densifies a second cryogenic liquid to a second, lower cryogenic temperature. A densified propellant management system also is provided which has a densifier for simultaneously densifying two cryogenic liquids at different temperatures, and a cryogenic temperature probe for measuring the temperature gradient in a cryogenic liquid.

An oscillatory power tool comprising: an output shaft for mounting a cutting tool and driving the cutting tool in an oscillating rotary motion; a fastener for fastening the cutting tool to the output shaft; the cutting tool comprising a securing section being capable of connecting with the output shaft; a driving section disposed on the free end of the output shaft for engaging with the securing section of the cutting tool; the driving section having a friction surface for contacting a surface of the securing section. Through close fit between the friction surface and the upper surface of the securing section, the oscillatory power tool can be connected with different types of cutting tools, thus greatly improving the universality and convenience of the oscillatory power tool.

The invention discloses an integrated semiconductor laser of a 2-micrometer single-mode high-power GaSb-based metal grating master oscillator power amplifier and a fabrication method of the integrated semiconductor laser. The semiconductor laser comprises a substrate, an epitaxial structure, a gain amplification region, a master oscillator region, a metal grating region and light limitation grooves, wherein the epitaxial structure is grown on the substrate and comprises an N-type lower contact layer, an N-type lower limitation layer, a lower waveguide layer, an active region, an upper waveguide layer, a P-type upper limitation layer and a P-type upper contact layer from bottom to top, the gain amplification region is arranged at the front part, namely an emergent light part of the semiconductor laser and is of an isosceles trapezoid structure formed by downwards etching the P-type upper contact layer, the master oscillator region is arranged at the rear part of the gain amplification region and is of a ridged waveguide structure formed by downwards etching the P-type upper contact layer and the P-type upper limitation layer, the metal grating region is arranged at the rear part of the master oscillator region and is of a periodic grating structure formed on the surface of the upper waveguide layer, the light limitation grooves are symmetrically arranged at the two sides of ridged waveguide structure, and the light limitation grooves and the ridged waveguide structure are arranged in an inclining manner.

A densifier is provided which in one embodiment can simultaneously densify two cryogenic liquids at different temperatures. The densifier has an oscillatory power source for generating oscillatory power and a two stage pulse tube refrigerator. The oscillatory power source can be a thermoacoustic heat engine or a mechanical oscillatory power source such as a linear flexure bearing compressor. The first stage densifies a first cryogenic liquid to a first cryogenic temperature, and the second stage densifies a second cryogenic liquid to a second, lower cryogenic temperature. A densified propellant management system also is provided which has a densifier for simultaneously densifying two cryogenic liquids at different temperatures, and a cryogenic temperature probe for measuring the temperature gradient in a cryogenic liquid.

The invention belongs to the technical field of the on-line detection and analysis of electric power system low-frequency oscillation. The invention provides a method for quantitatively evaluating the contribution degree of an electric generating set associated with a node participating in the oscillation of certain mode to the oscillation power of the mode in a power system, only based on the information of Wide Area Measurement System. In the method, a concept of node contribution factor is first proposed based on injection active oscillatory power, and then according to the amplitude of injection active oscillatory power and the relative phase position among active oscillatory power curves under certain frequency mode, an analysis and calculation method is provided corresponding to the node contribution factor of the frequency mode, and the homology and grouping of the node are realized at the same time. The method is applicable to a system without an electromagnetic ring net and consideration for losses and can also be used for an actual electric power system which has the above characteristics through simplification.

The invention discloses a solar power thermoacoustic piezoelectric power generation system and a power generation method thereof. The system comprises a solar power light condensing device, a thermoacoustic motor, a sound wave conversion device, a piezoelectric power generation device, an electrical energy conversion device, and an energy storing device. The system and the method effectively solve the problems that the structure is complex, the size is large, the operating frequency is low, high-power power generation can not be conducted, and the advantage that the thermoacoustic motor produces high frequency stress wave easily can not be effectively played existed in an electrolyte-magnetic field coupled power generation system and a linear oscillatory power generation system adopted by a conventional solar power thermoacoustic piezoelectric power generation system. Therefore, the solar power thermoacoustic piezoelectric power generation system provided by the invention has simple structure, smaller size, convenience in mounting, stable and reliable operation, and high power generation efficiency of the overall system; meanwhile the scale of the solar power thermoacoustic piezoelectric power generation system can be set according to actual requirements, the manufacturing is flexible, the manufacturing period of the overall system is short, and the cost is low.

The invention relates to an interval oscillation damping method based on input signal switch of FACTS of WAMS and PSS, and belongs to the technical field of power system stability and control. When interval oscillation occurs in a call wire L1 of an electrical power system, oscillation occurs in power on call wires between areas, and oscillatory power of the wires is adjusted through a FACTS device. Varying quantity of active power of the wires is calculated according to reactive power provided by FACTS, and a calculated value is variable quantity of electromagnetic power of a generator. The size of damping moment coefficient can be solved according to the relationship between the electromagnetic power of the generator and damping, and at last by comparing the relationship between the solved value of damping moment coefficient and a set threshold value, the phenomenon that a generator electromagnetic power signal or a generator speed signal is adopted by a signal input by PPS is judged. Real data detected by a WAMS system are not needed, only WAMS sends a trigger signal to PSS when the oscillation occurs in the wires, and the trigger signal is not sent when the oscillation does not occur.

The invention relates to a traversing impedance-based wideband disturbance stability analysis method of a regional power grid. According to the method, a three-phase voltage and three-phase current signal of an AC bus access circuit of a substation is detected, impedance under oscillation power and oscillation frequency point is calculated, stable criterion is given out, the running condition characteristic data of an oscillation moment system is simultaneously combined, an oscillation connection factor set for the stability criterion is built, and analysis is performed to obtain an importantinfluence factor set and an unimportant influence factor set of the system oscillation. By the method, analysis can be performed on the connection factor according to disturbance data, existing at anytime, of a power system before and after oscillation occurs in the system, so that a main factor affecting sub / super-synchronous oscillation generated by grid connection of a new energy field stationis obtained, and the method is suitable for effectively preventing and controlling the sub-synchronous / super-synchronous oscillation generated by large-scale grid connection of a wind power generatorset.

A high frequency power detector includes an input coupling arrangement that couples an electrical HF-oscillation into a basic circuit portion including at least a first diode and a circuit node. The power detector further includes a series circuit of a resistor and a second diode connected to the circuit node, as well as a voltage tapping arrangement for detecting or tapping the voltage drop across the second diode as an output signal. The voltage at the circuit node includes a DC component that depends on the power of the HF-oscillation. The output signal, i.e. the voltage drop of the second diode, has a linear voltage characteristic relative to the HF-power in dBm. A method of regulating the HF-power uses such a dBm-linear HF-power detector in a feedback loop for regulating the gain factor of an HF-amplifier.

The invention relates to a saw blade high frequency annealing method which is characterized in that the equipment working voltage is 380V / 50Hz; the working oscillatory power is 30-60KVA; the working oscillation frequency is 30-100kHz; every set of equipment can anneal 10-20kg / min; the annealing temperature is 550-650 DEG C; the annealing length between the two ends of a saw blade is 20-30mm; the hardness is HRA62-75 after annealing. The method has the advantages of low energy consumption, no pollution, low cost and no danger for operating workers.

The invention relates to an anti-return main oscillation power amplification pulse laser, which sequentially comprises a seed semiconductor laser, a return light processor, a first-stage amplifier, a first-stage return light processor, a second-stage amplifier, a second-stage return light processor,..., an n-stage amplifier and an n-stage return light processor. The return light processors are designed to ensure forward transmission of signal light, prevent reverse transmission of the signal light, prevent reverse transmission of non-linear laser, ASE light and return light outside a light path, and monitor the return light. The laser does not limit the starting time of the Seed LD, can realize continuous adjustment of the pulse width and the frequency, does not need a complex structure and calculation, is low in cost and compact in structure, can process return light of each wave band, effectively protects the laser, and prolongs the service life of the laser.

The invention discloses a main oscillation power amplification laser. The main oscillation power amplification laser comprises a substrate; an epitaxial layer arranged on the substrate, wherein the epitaxial layer sequentially comprises a lower limiting layer, a lower waveguide layer, an active layer, a first upper waveguide layer and a second upper waveguide layer from the substrate to the top, and the second upper waveguide layer is in contact with a partial region of the first upper waveguide layer; a main control oscillator structure which is arranged on the surface of the first upper waveguide layer, and is a ridge-shaped waveguide structure; and a power amplifier structure which is arranged on the surface of the second upper waveguide layer, is coupled with the master control oscillator structure, and is a conical waveguide structure.

The invention belongs to the technical field of the on-line detection and analysis of electric power system low-frequency oscillation. The invention provides a method for quantitatively evaluating the contribution degree of an electric generating set associated with a node participating in the oscillation of certain mode to the oscillation power of the mode in a power system, only based on the information of Wide Area Measurement System. In the method, a concept of node contribution factor is first proposed based on injection active oscillatory power, and then according to the amplitude of injection active oscillatory power and the relative phase position among active oscillatory power curves under certain frequency mode, an analysis and calculation method is provided corresponding to thenode contribution factor of the frequency mode, and the homology and grouping of the node are realized at the same time. The method is applicable to a system without an electromagnetic ring net and consideration for losses and can also be used for an actual electric power system which has the above characteristics through simplification.

The application discloses a graphene-based main oscillation power amplifier, including a main oscillation laser, a first beam expander collimator, a transmissive graphene optical isolator, a first amplifier, a mirror, a second beam expander collimator, a reflector type graphene optical isolator, a second amplifier; the transmissive graphene optical isolator includes a first substrate, the first graphene film positioned at the front of the first substrate or the back of the first substrate; the reflective graphene optical isolator includes a second Substrate, the second graphene film positioned at the front of the second substrate; the diameters of the first graphene film and the second graphene film are greater than the diameter of the incident laser, and the front of the first substrate and the front of the second substrate are respectively facing the first beam expander The surface of the collimating device and the surface of the second beam expander collimating device. The transmissive graphene optical isolator and reflective graphene optical isolator have the ability to suppress small signal noise light and high-power laser light to pass through without loss, and can effectively ensure the laser power stability of the main oscillation power amplifier.

The invention discloses a monitoring method and a monitoring device of motion data index. The monitoring device comprises a portable monitoring terminal, and the monitoring terminal comprises an acceleration sensor, a processor and a display device; the display device is electrically connected with the processor, for displaying the monitoring index data output by the monitoring terminal, and the monitoring index data comprises left and right oscillation power; the acceleration sensor can feed back the left and right accelerations relative to a monitored object to the processor, and the processor can calculate the left and right oscillation power consumed by each step of the monitored object according to the left and right accelerations fed back by the acceleration sensor; and it can be seen from the above that the above monitoring device can provide runners with oscillation power parameters including left and right oscillation power, so as to provide runners with more professional running posture evaluation data, and help professional runners improve the running skills.

An oscillatory power tool that is capable of using various types of cutting tools is disclosed. The power tool includes an output shaft for mounting one of the cutting tools and driving the cutting tool in an oscillating rotary motion. An end of the output shaft has a driving section for engaging with a securing section of the cutting tool. The power tool further includes a fastener connected to the output shaft at the end and connectable to the securing section of the cutting tool for fastening the cutting tool to the end of the output shaft. The driving section has a fitting surface for contacting a surface of the securing section. Through a close fit between the friction surface and the surface of the securing section, the power tool can be connected with different types of cutting tools, which greatly improves the universality and convenience of the power tool.

The invention discloses a method for simultaneously testing the frequency and power of a return-wave tube oscillating microwave signal, comprising: step 1, degassing the return-wave tube in a vacuum oven to obtain A; step 2, soldering wires to the output electrode of A, The different output electrodes of the return wave tube are distinguished by the color codes of the wires of different colors to obtain B; step 3, evenly coat the ceramic part of the electron gun of B with silicone rubber and let it stand for no less than 24 hours, and then pour the insulating silicone rubber Seal and let stand for no less than 12 hours to obtain C; step 4, install the magnetic system fixing bracket on C to obtain D1, then install D1 in the magnetic system to obtain D2, install D2 on the three-axis adjustment tooling and D is obtained by fastening the connection part. The invention can simultaneously measure the oscillation frequency and oscillation power of the return wave tube in operation.

The invention relates to an interval oscillation damping method based on input signal switch of FACTS of WAMS and PSS, and belongs to the technical field of power system stability and control. When interval oscillation occurs in a call wire of an electrical power system, oscillation occurs in power on call wires between areas, and oscillatory power of the wires is adjusted through a FACTS device. Varying quantity of active power of the wires is calculated according to reactive power provided by FACTS, and a calculated value is variable quantity of electromagnetic power of a generator. The size of damping moment coefficient can be solved according to the relationship between the electromagnetic power of the generator and damping, and at last by comparing the relationship between the solved value of damping moment coefficient and a set threshold value, the phenomenon that a generator electromagnetic power signal or a generator speed signal is adopted by a signal input by PPS is judged. Real data detected by a WAMS system are not needed, only WAMS sends a trigger signal to PSS when the oscillation occurs in the wires, and the trigger signal is not sent when the oscillation does not occur.

The invention belongs to the technical field of ultrafast lasers, and discloses a high-brightness main oscillation power amplifying picosecond laser system, comprising an all-polarization-maintaining fiber picosecond seed laser, a fiber collimator, a space isolator, 45° total reflection mirror, polarization beam splitter prism, one-stage solid-state traveling wave amplifier, two-stage solid-state traveling wave amplifier and three-stage solid-state traveling wave amplifier, the first-stage solid-state traveling wave amplifier is located on the transmitted light side of the polarization beam splitter The wave amplifier is located on the reflected light side of the polarization beam splitter prism, and the fiber collimator is connected to the all polarization maintaining fiber picosecond seed laser through the pigtail. The picosecond laser system disclosed by the invention has the advantages of simple structure, stable performance and easy maintenance, and can realize high-brightness 1064 nm laser output. By setting up a frequency doubling module that is easy to integrate and disassemble, based on 100W fundamental frequency light, it can achieve more than 50 W The green light output can meet the needs of a wide range of industrial applications.

Disclosed are a method and circuit for 75o KHz high voltage gas discharge lamp driving. The circuit comprises a high voltage rectification filter unit and a direct-current voltage reduction and stabilization unit, and the output of the voltage reduction and stabilization unit is connected with a control chip in an intelligent oscillation control unit; square signals output by two pins of the control chip are set to be 750 KHz; meanwhile, the falling edge of the square signal output by the first pin is made to be earlier than the rising edge of the square signal output by the second pin by a certain time, and the rising edge of the square signal output by the first pin is made to be later than the rising edge of the square signal output by the second pin by a certain time. The method and circuit have the advantages that according to the scheme, the method and system can be away from an acoustic resonance window area, second-order conversion is adopted, electric energy losses are small, electric energy conversion efficiency is improved, stroboflash does not exist, and optical efficiency is high. The selected control chip is low in price and strong in function, the drive frequency and the half-bridge oscillatory power unit dead time of the high voltage gas discharge lamp can be controlled, the process is simple and convenient to implement, the rate of finished products is high, and batch production is facilitated.

A method for analyzing broadband disturbance stability factors of regional power grid based on ergodic impedance. The method detects the three-phase voltage and three-phase current signals of the AC bus access line of the substation and calculates the oscillating power and impedance at the oscillating frequency point to give The stability criterion is obtained. Combined with the characteristic data of the system operating conditions at the time of oscillation, a set of oscillation-related factors for stability judgment is established, and the set of important and unimportant factors affecting the system oscillation is obtained by analysis. This method can analyze the related factors before and after the system oscillation according to the disturbance data that exists in the power system all the time, so as to obtain the main factors that affect the sub- / super-synchronous oscillation generated by the grid connection of the new energy station, which is suitable for large-scale wind turbine generators. Effective prevention and control of sub-synchronous / super-synchronous oscillation occurs when the grid is connected.

The invention discloses a method and a device for obtaining oscillating power under grid transient faults. When grid transient faults occur in power electronic equipment, the method first measures the inductance voltage and current of the network inductance branch, and measures the inductance voltage and current respectively. Perform Hilbert transform; then calculate the instantaneous resistance represented by the network inductance branch according to the inductor voltage, current, Hilbert transform voltage parameter, and Hilbert transform current parameter; and calculate the network inductance branch The instantaneous power of ; extract the power consumed by the instantaneous resistance related to the instantaneous resistance from the instantaneous power, and use the power consumed by the instantaneous resistance as the oscillation power. The invention can help to solve the existing problems that the amplitude frequency of the internal potential of the power electronic equipment changes with the imbalance of the input and output power of the equipment, and the change of the amplitude and frequency of the internal potential will adversely affect the input and output power imbalance of the equipment through the network. There are flaws in the technology.