216 results about "Oscillatory waves" patented technology

An active sensor 10 is positioned on an outside of a pipe 60 so as to detect a thickness of the pipe. The active sensor comprises: an oscillator 15 capable of inputting oscillatory waves into the pipe and sweeping a frequency of the oscillatory waves within a desired range; and an optical fiber sensor mounted on the pipe, the optical fiber sensor detecting the oscillatory waves generated in the pipe.

The invention discloses a device and a method for detecting cable oscillatory wave partial discharge and fault location, wherein the device comprises a system power supply control host, a high voltage reactor unit, a partial discharge detection device, a software system and a cable sample to be tested, 220V alternating voltage is input into the system power supply control host, and is converted into direct voltage through a rectifier, and the direct voltage is converted into the alternating voltage with adjustable frequency and amplitude through an inverter. The system power supply control host automatically searches the system resonant frequency, the output voltage is adjusted to reach the initial set test voltage value of the system, users carry out cable withstand voltage tests or damped oscillation wave partial discharge detection tests according to the requirements, and the system locates the fault location through analysis and diagnosis according to the acquired cable partial discharge signals.

The disclosed nasal bone conduction hearing aid comprises: a tuning and control equipment to receive and treat external sound signal, a bone-skin conduction oscillation device with an oscillator to receive the signal from former equipment, and a carrier device on nasal part to bear said devices and make said oscillator close contact the nasal bone skin and convert the electric wave received by said oscillation device into oscillatory wave to send to nasal part and into inner ear.

The invention discloses an oscillation wave partial discharge identifying and positioning method for an asynchronous double-end power cable. The method disclosed by the invention comprises the following specific steps: respectively installing oscillation wave partial discharge signal acquisition devices at the two ends of the cable; obtaining the voltage and partial discharge capacity signals at the two ends of the detected cable through data acquisition; recording and converting the corresponding data to obtain a waveform file which is needed for failure positioning; calling a partial discharge positioning algorithm to carry out the failure positioning; and computing the accurate position of a failure point generating partial discharge signals. The positioning analysis result obtained by the invention is more accurate; the error rate is small; the wave velocity does not need to be known, thereby reducing the errors caused by computing the wave velocity; the excessive manual intervention is needed; the problems of large data quantity, inaccuracy in positioning and the like because different pulses under the voltage of each experiment are matched are avoided; and the rapid and accurate failure positioning course of the method is beneficial to the timely repair of faulty lines and the reduction of loss caused by power failure.

The invention discloses a healthcare therapeutic apparatus of cardiovascular diseases, which is composed of a shell, a keypad arranged on the shell, a display, a cuff connected with the shell, an inflator pump arranged in the shell, a pressure sensor, an electromagnetic valve and a control circuit. The pressure sensor is connected with the cuff and used for detecting gas pressure and pressure oscillatory wave in the cuff. The detection signal output end of the pressure sensor is connected with the signal input end of a control circuit. The control circuit executes closed-loop control on the gas in the cuff via the inflator pump, the pressure sensor and the electromagnetic valve. The healthcare therapeutic apparatus can effectively stop the limb blooding of a user at intervals by repeatedly pressing hard upon the limb of the user, thus inspiring the anti-ischemia / ischemia or oxygen deficiency resistant potential of organism tissue cells, improving the viability and operational capacity of the organism, an organ or tissues under the condition of the oxygen deficiency, having a remarkable effect on preventing cardio-cerebrovascular diseases and treating ischemic mind-brain diseases, and reducing the incidence of sudden death and stroke. Therefore, the healthcare therapeutic apparatus of the cardiovascular diseases is suitable for a family and an individual.

An oscillatory wave generator for electric equipment tests is composed of a power supply AC, a switch K1, a capacitor C and an inductor L. Before closing the switch K1, the power supply AC, the capacitor C and the inductor L form a serial loop, after closing the switch K1, the capacitor C and the inductor L form a LC attenuation oscillating circuit, wherein the internal resistance of the power supply is R, the internal resistance of the inductor is R0. The invention is characterized in that a frequency and voltage modulated power source is adopted as the power supply AC, the switch K1 is an electronic switch. The invention has the advantages that the oscillatory wave generator adopts an alternative current power supply of lower voltage as excitation to realize the resonance of the LC series loop to attain resonance high voltage, and according to electrotechnology theory, the resonance high voltage is Q powers of the alternative current excitation voltage, wherein Q is the quantity factor of the LC series resonance loop, and since the alternative current excitation power supply has low voltage, the electric switch can attain lower working voltage.

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.

An active sensor 10 is positioned on an outside of a pipe 60 so as to detect a thickness of the pipe. The active sensor comprises: an oscillator 15 capable of inputting oscillatory waves into the pipe and sweeping a frequency of the oscillatory waves within a desired range; and an optical fiber sensor mounted on the pipe, the optical fiber sensor detecting the oscillatory waves generated in the pipe.

The invention provides an oscillatory-wave-based simulation system for detecting and positioning partial discharge of a cable. The oscillatory-wave-based simulation system comprises a tested cable, a high-frequency coupler, an oscillatory wave circuit, a control module and a display module, wherein a defect point is arranged on the tested cable; the control module outputs a control signal to control the oscillatory wave circuit to produce oscillatory wave voltage; the oscillatory wave circuit outputs the oscillatory wave voltage to the tested cable connected in series with the oscillatory wave circuit, and the oscillatory wave voltage excites a partial discharge signal at the defect point; the high-frequency coupler is connected with a first endpoint of the tested cable and used for receiving the partial discharge signal; the control module positions the defect point according to the received partial discharge signal; and the display module displays the positioning result. The oscillatory-wave-based simulation system is low in simulation cost and high in efficiency, can be used for experiments and trainings in a power system simulation platform, and is suitable for popularization.

The invention relates to the technical field of sealing and bursting coal mine boreholes, and particularly relates to a carbon dioxide induced cracking device for coal seam seal holes. The device comprises a main pipe 1, a heating device 2, a detonation head 3, an energy depleting device 4, a protective cover 5 and a borehole sealer 6, wherein the heating device 2 is arranged in a charging cavity 11 inside the main pipe 1, the bursting head 3 is arranged on the front end of the main pipe 1, the energy depleting device 4 is arranged on the rear end of the main pipe 1, and the protective cover 5 and the borehole 6 are arranged on the rear end of the energy depleting device; an energy depleting channel 31 is arranged on the bursting head 3, one end of the energy depleting channel 31 is connected with the charging cavity 11 of the main pipe 1, and the other end of the energy depleting channel 31 is connected with a carbon dioxide mining device; the energy depleting device 4 consists of an energy depleting head 41 and an energy depleting channel 42, and a constant-pressure energy depleting sheet 7 is airtightly arranged between the energy depleting channel 42 and the charging cavity 11 of the main pipe 1 and can force the heating device to heat and gasify liquid-state carbon dioxide charged into the charging cavity 11 of the main pipe 1 and be expanded to generate bursting force. The device is characterized in that a carbon dioxide flow adjusting valve 8 is arranged at the position where the carbon dioxide mining device is communicated with the energy depleting channel 31 of the bursting head 3. Sparks are not generated during bursting induced cracking full process, the cracked coal blocking forming rate is high, no destructive oscillation and oscillatory wave are generated, the collapse and cracking damage of other places cannot be caused, and the bursting force is easily controlled.

An oscillatory wave motor, a lens barrel, and a camera system are provided, which have long service lives and which are stable. An oscillatory wave motor includes an oscillator which generates oscillation on an elastic member in accordance with excitation of an electromechanical conversion element, and a relative movement member which is pressurized to make contact with the oscillator and which moves relative to the oscillator in accordance with the oscillation. The oscillatory wave motor has an epoxy resin film formed of silicon beads and an epoxy resin and which is formed on at least one of frictional contact surfaces of the oscillator and the relative movement member.

Disclosed is a distributing cable partial discharge test method based on oscillatory wave test. The method includes that a cable partial discharge testing and locating system based on oscillatory wave test is established; by means of the testing system, a cable is charged through a method of voltage increasing to a preset value at a tested cable end, and damped oscillation voltage is generated at the tested cable end through resonance oscillation that occurs by an inductor and a tested cable capacitor in the system; when partial discharge occurs at a position of the tested cable in a distance from a testing end, pulses can spread in two directions along the cable, and the position where the partial discharge occurs can be determined according to time difference that two pulses such as incident wave and radioactive wave reach the testing end. According to the distributing cable partial discharge test method based on oscillatory wave test, oscillatory wave is applied to partial discharge test of the distributing cable, and voltage increasing is performed on the cable through sine oscillatory wave that is generated by resonance oscillation of fixed inductor and the cable. By means of the distributing cable partial discharge test method based on oscillatory wave test, insulating conditions of the cable can be timely known within short time by the system, and thereby, accidents of the cable can be effectively prevented.

The invention provides a device for oscillatory wave generation in an electrical device partial discharge test. The device comprises a first switch set, a second switch set, a fifth switch, a power supply, a damping resistor with the adjustable resistance value and an LC oscillating circuit. The first switch set comprises a first switch and a fourth switch. The second switch set comprises a second switch and a third switch. A series circuit composed of the first switch and the second switch, a series circuit composed of the third switch and the fourth switch and the power supply are in parallel connection. A circuit between the first switch and the second switch is connected with one end of the fifth switch. A circuit between the third switch and the fourth switch is connected with the other end of the fifth switch. The LC oscillating circuit and the damping resistor are in series connection and then in parallel connection with the fifth switch. The invention further provided with a method for oscillatory wave generation in the electrical device partial discharge test. High-voltage test oscillatory waves can be generated through the direct-current low-voltage excitation power supply and the electronic switches.

An oscillatory wave generating unit and an oscillatory wave sensing unit are installed at both ends of a refrigerant pipe of an evaporator of the cooling system, an amount of frost formed on the refrigerant pipe is determined by comparing a wave form of an oscillatory wave generated from one end of the refrigerant through the oscillatory wave generating unit and a wave form of the oscillatory wave sensed by the other one end of the refrigerant through the oscillatory wave sensing unit, and whether or not a defrosting operation is performed is determined by a result of the determination. The cooling system increases the accuracy in sensing the amount of the frost formed on the evaporator of a refrigerator, a Kimchi refrigerator, or an air conditioner, and respectively starts and ends the defrosting operation at proper points of time, thus enhancing a heat-exchanging performance and increasing energy efficiency.

The invention relates to oil production auxiliary devices, in particular to a dual-sound-wave eddy wax-preventing and viscosity-reducing device. The dual-sound-wave eddy wax-preventing and viscosity-reducing device is formed by connecting a jet-flow ultrasonic oscillation portion and an eddy flow guiding and jetting portion in a butted mode, wherein a cavitation chamber is arranged between the jet-flow ultrasonic oscillation portion and the eddy flow guiding and jetting portion. The dual-sound-wave eddy wax-preventing and viscosity-reducing device is characterized in that the jet-flow ultrasonic oscillation portion is composed of two stages of jet-flow ultrasonic oscillators which are arranged with the spacing distance of 200+ / -50 mm, and the jet-flow ultrasonic oscillators are installed in a cylindrical shell together, the oscillatory wave frequency of the first stage of jet-flow ultrasonic oscillator ranges from 4000 HZ to 25000 HZ, and the oscillatory wave frequency of the second stage of jet-flow ultrasonic oscillator ranges from 8000 HZ to 50000 HZ. The jet-flow ultrasonic oscillator of each stage is provided with a jet nozzle, wherein a wedged through hole is formed in the middle of each jet nozzle, a support extending outwards is designed to be arranged at the small-opening end of each jet nozzle, and an oscillating elastic piece is installed on each support. According to the dual-sound-wave eddy wax-preventing and viscosity-reducing device, the problems that blocking can easily happen due to high wax content, viscosity of crude oil is large, and crude oil is poor in liquidity are solved better, yield of pumped oil is greatly increased, and the device is widely applicable to oil production of oil wells different in type, wax content and water content.

The invention discloses a method for detecting a cable fault point by an impact oscillating wave principle. The method comprises the following steps: the grounding output end of a pulse signal source is connected with the initial end grounding line of a fault cable to be detected; the high-voltage output end of a signal source is connected with one end of a high-voltage resonance reactor; the other end of the reactor is connected with a fault phase; the terminal end groundling line is cut off; the signal source applies the pulse signal by the reactor so that the fault point forms an instant short circuit electric arc; the fault cable generates a damped oscillating wave and radiates an electromagnetic field signal to the outside; the magnetic field signal in the signal is detected; a damped oscillating wave form for reflecting magnetic field signal change is arranged at the left side in the front of the cable fault point; a damped oscillating wave form for reflecting sharp attenuation of the magnetic field signal change is arranged at the right side behind the cable fault point; and the cable position corresponding to the change place of the magnetic field signal is the position in which the cable fault point is located. The invention is suitable for cable fault positioning under various laying conditions, has the advantages of simple structure and convenience in use and is widely used for power systems and all enterprises and public institutions.

The invention provides a resistance, inductance and capacitance measurement method based on damping oscillatory wave in an oscillation circuit. According to the method, an improved discrete Fourier algorithm is used to realize high-precision measurement of resistance, inductance and capacitance parameters; window function processing is carried out on a detection voltage signal; the influence of a truncation effect in standard discrete Fourier transformation can be effectively suppressed; the accuracy of Fourier transformation is improved; the measurement accuracy of resistance, inductance and capacitance parameters is improved; on the basis that window function processing is carried out on the detection voltage signal, a single spectral line interpolation algorithm is further used; frequency calculation errors caused by non-integer number cycle sampling are corrected; spectral amplitude errors caused by the truncation effect are corrected; and the accuracy of the measurement method is further improved.

A catalyst composition, suitable for polymerization of low-density and high-molecular weight polyolefin, comprising unsymmetrical unabridged metallocene compound and an aluminoxane is disclosed, wherein the metallocene compound and the aluminoxane are uniformly deposited on a porous support by using an oscillatory wave having the frequency of 20 to 500 kHz, and the activity of the catalyst composition increases when hydrogen is introduced in the polymerization of olefin. The catalyst composition includes a metallocene compound represented by (R<1>CpR<2>)(Cp'R<3>)MX2 for polymerization of olefin, and an aluminoxane, wherein Cp is a cyclopentadienyl radical; Cp' is a radical having a cyclopentadienyl moiety; R<1 >is a radical selected from cyclohydrocarbyl radicals having 3 to 11 carbon atoms; R<2 >and R<3 >are one or more substituents substituted on Cp and Cp', respectively; M is a transition metal of Group 4B, 5B, or 6B of the Periodic Table; and X can be the same or different, and is a radical selected from halogen, alkyl, aryl, alkenyl, alkylaryl, arylalkyl, alkoxy, and aryloxy radical having 1 to 20 carbon atoms, and the metallocene compound and the aluminoxane are deposited on porous support.

The invention discloses a parallel resonance oscillation wave generation device. A frequency modulation and voltage regulation power supply AC, a capacitor C and an electric inductor L form a shunt circuit. The frequency of the power supply AC is adjusted to resonate with an LC circuit, then the output voltage of the power supply AC is adjusted to a preset value, the power supply AC is shutoff, and thus the damped oscillatory wave f(t) is produced on the LC circuit. During the concrete application, an exciting transformer T or a leakage inductance transformer TL is arranged between the power supply AC and the LC circuit, a primary side of the transformer is connected with the output of the power supply AC, and a secondary side of the transformer is parallelly connected with the LC circuit. When the leakage inductance transformer is adopted, a leakage inductor L of the secondary side of the leakage inductance transformer is parallelly connected with the capacitor C. The device has the advantages that the device can produce the oscillatory wave with the voltage of between 1 and 5,000kV on the LC circuit without the switching or shutoff of an electronic switch, and has broad application in sine wave withstand voltage and local discharge measurement of high-voltage equipment.

The invention discloses a cable withstand voltage partial discharge synchronous detection device, which comprises a high-voltage direct current power supply unit, a polarity conversion unit and an oscillatory wave generation unit; the high-voltage direct current power supply unit is connected with an alternating current power supply and converts and outputs alternating current into high-voltage direct current; one end of the polarity conversion unit is connected with the high-voltage direct-current power supply unit and used for outputting ultralow-frequency cosine square waves as withstand voltage test waves, and the other end of the polarity conversion unit is connected with a cable to perform withstand voltage detection on the cable; one end of the oscillatory wave generation unit is connected with the high-voltage direct-current power supply unit, and the other end of the oscillatory wave generation unit is connected with the cable and forms an oscillation circuit with the cable togenerate damped oscillation to perform partial discharge detection on the cable. The cable withstand voltage partial discharge synchronous detection device disclosed by the invention can synchronously perform withstand voltage detection and partial discharge detection on the cable, improves the detection efficiency, can also improve the voltage of partial discharge detection during synchronous detection, is easier to discover a partial discharge phenomenon, and has very strong practicability in the technical field of cable detection.

An oscillatory wave drive unit includes at least one vibrator having an electromechanical energy converting element, and at least one supporting member configured to support the at least one vibrator. The oscillatory wave drive unit excites oscillation in the at least one vibrator and moves a moving body in contact with the at least one vibrator by frictional force. The oscillatory wave drive unit includes at least one moving mechanism configured to support the at least one vibrator movably in a plane parallel to the plane where the at least one vibrator and the moving body are in contact with each other, in a second direction intersecting with a first direction in which the at least one vibrator drives the moving body.

The invention discloses a finger touch positioner and a method, belonging to the technical field of touch. The finger touch positioner comprises a solid panel, at least three oscillatory wave sensors and a positioning recognition and treatment unit, wherein the solid panel correspondingly generates and transmits oscillatory wave after contacting with fingers; the oscillatory wave sensors are respectively stuck on the solid panel so as to convert the oscillatory wave generated by contacting fingers with the solid panel into electric signals; and the positioning recognition and treatment unit calculates to obtain the contact position of the finger on the solid panel by receiving the electric signals of the oscillatory wave sensor and combining the physical position information of the oscillatory wave sensor. The invention fully utilizes the oscillatory wave generated by contacting fingers with the solid panel to realize precise positioning of fingers by low cost.

The invention discloses a damped oscillatory wave lower local cable local discharge detection device and method. The detection device comprises a signal coupling unit and a broadband amplifying unit; the signal coupling unit comprises a detection impeder and a coupling capacitor, one end of the detection impeder is connected with the low-voltage side of the coupling capacitor, and the other end of the detection impeder is connected to the ground; the broadband amplifying unit comprises an attenuator, an attenuator driving circuit, a latch and an amplifier. The signal coupling unit is coupled with original signals which discharges locally and is coupled with reflection signals at the end portion of a cable. The coupled locally-discharged signals are amplified for a proper time by the amplifier and passes through the effective frequency band of the amplifier, a large amount of interfering signals and background noise are removed through filtering, and the signal to noise ratio of the locally-discharged signals is sufficiently improved. Finally, the amplified signals are transmitted to the input end of a collecting card so that a digital meter can process the locally-discharged signals.

Disclosed herein is a driving method of a liquid drop ejecting head in which an oscillatory wave is imparted to a liquid accommodated in a pressure chamber using an electromechanical transducer, which is driven by applying a predetermined driving waveform to the electromechanical transducer, thereby discharging a liquid drop from a nozzle to record an image. The driving method comprising: detecting an environmental temperature, and expanding and / or contracting the driving waveform to be applied to the electromechanical transducer, in a voltage axial direction and a time axial direction, in accordance with the detected environmental temperature, and applying the resulting driving waveform to the electromechanical transducer. Also disclosed is adjusting the waveform of a reverberation adjustor portion of the driving waveform, which adjusts a residual oscillation of the liquid, in accordance with the detected environmental temperature.

The invention discloses a blood pressure measuring device. The blood pressure measuring device is formed by double airbag sleeve belts, double pressure sensors, an air pump, a proportion deflation valve, a solenoid valve, an MCU controller, a measurement result display device, a voice broadcast device, and a button. The blood pressure measuring device is provided with a control circuit connected with the air pump, the solenoid valve and the proportion deflation valve, and a plurality of signal circuits respectively connected with the pressure sensors. The blood pressure measuring device uses two pressure sensors. A microphone is avoided from affecting by the surrounding noise while the signal detection sensitivity is improved. The data collection of two pressure sensors is synchronous in the timing sequence. According to an oscillatory wave signal of the second pressure sensor detected by the downstream airbag, the pressure value detected by the first pressure sensor in the upstream airbag is judged while the artery blood flow is opened, so that the systolic pressure of the detected artery is determined.

The invention relates to a method for non-invasive blood pressure detection. The method for non-invasive blood pressure detection is particularly applicable to newborn. The method for non-invasive blood pressure detection comprises the following steps of A0, carrying out initial setting on a pre-inflation value P0 and an inflation added value of the pre-inflation value P0, A1, carrying out pre-inflation to reach the pre-inflation value P0, carrying out real-time measurement to obtain a cuff pressure value, judging whether the cuff pressure value is excessively large, carrying out rapid deflation when the cuff pressure value is excessively large, carrying out stepped step-by-step inflation according to the inflation added value when the cuff pressure value is not excessively large, carrying out sampling to obtain an initial sampling signal, judging whether the cuff pressure value is excessively large after inflation of each step is carried out, carrying out step A2 when the cuff pressure value is excessively large, carrying out preprocessing on the initial sampling signal so as to eliminate noise, obtaining a sampling signal after the preprocessing, carrying out pulse wave detection on the sampling signal after the preprocessing, storing a corresponding cuff pressure value P1 when an oscillatory wave appears for the first time, storing a corresponding cuff pressure value P2 when the oscillatory wave disappears finally, using the cuff pressure value P1 and the cuff pressure value P2 as critical values, and setting the pre-inflation value P0 to be equal to a Pt according to the cuff pressure value P2, A2, carrying out stepped step-by-step deflation, carrying out real-time measurement to obtain the cuff pressure value, carrying out measurement on blood pressure, and A3, calculating measuring results.

Continuous measurement of breathing impedance with extremely high precision is enabled by executing noise elimination. A loudspeaker 21 applies an air vibration pressure by an oscillation wave to an oral cavity, the oscillation wave being obtained by frequency-culling so executed that the oscillation wave has only the frequency component that is left after the culling is executed from a plurality of different frequencies and being generated by a pulse signal for pulse drive with pulses made positive and negative separately in correspondence to the time of exhalation and the time of inhalation. A pressure inside the oral cavity is detected and a breathing flow is detected, and a signal obtained by the detection is Fourier-transformed by a Fourier transforming means 32 to obtain a spectrum. A breathing high frequency component that contributes as a noise is obtained by an extracting means 33, using a spectrum that corresponds to a frequency component culled from the result of the Fourier transformation. This breathing high frequency component is subtracted from a spectrum that corresponds to a frequency component left by the culling to extract an oscillation wave component. Computing of dividing a pressure component by a flow component for each of frequencies for the result of this extraction is executed by a computing means 34 to obtain breathing impedance.

A biological signal measuring apparatus that is provided with an oscillatory wave detection means, an oscillatory wave period measuring part, a group memory means that is configured to collect the periodic data and to store the periodic data as a group signal, and a vibration frequency calculation means. The vibration frequency calculation means is provided with a section discrimination part configured to compare the group signal with a predetermined value to carry out a section discrimination, a section memory part configured to store to a plurality of sections, a weight coefficient memory part configured to store a weight coefficient, and an oscillatory wave period weighted average value calculation part.

An oscillatory wave motor includes an oscillator having an oscillation body and an electro-mechanical energy-converting element, and a flexible heat-conducting member configured to dissipate heat generated by the oscillatory wave motor. The oscillatory wave motor drives a moving body in contact with a contact portion formed in the oscillation body by an elliptical movement of the oscillator, and the heat-conducting member is provided in addition to a heat-conducting path that conducts heat generated by the oscillatory wave motor through an oscillator supporting member that supports the oscillator or a heat-conducting path that conducts heat through the moving body.