46 results about "High frequency oscillatory" patented technology

An impact absorber employs dilatant (shear responsive) fluid that is subjected to a controlled, low amplitude, high frequency oscillatory stress which controls the stiffness of the fluid. Piezoelectric transducers, voice coils, and other forms of transducers may be used to apply controlled vibratory stress to the fluid. The energy absorber may be used in protective body armor, medical devices such as splints and casts, vehicle safety absorbers and many other products which benefit from ability to control the stiffness of the energy absorber.

The invention relates to a micro-mass sensor based on beat frequency type thin film bulk acoustic resonator; the micro-mass sensor comprises a quality sensing thin film bulk acoustic resonator used in quality sensing, the thin film bulk acoustic resonator used to generate reference frequency, a first and a second high frequency oscillatory circuits, a high frequency amplification circuit, a high frequency mixing circuit, a lowpass filter circuit and a frequency measuring and display device; wherein the first and the second high frequency oscillatory circuits are respectively connected with the quality sensing thin film bulk acoustic resonator and the thin film bulk acoustic resonator and compose a first and a second high frequency oscillators. When the quality load on the quality sensing thin film bulk acoustic resonator has micro-variation, the frequency of high frequency signals output from the first high frequency oscillator generates micro-deviation; after being amplified, the reference high frequency signals generated from the second high frequency oscillator is output into the high frequency mixed circuit with the high frequency signals output from the first high frequency oscillator; both of the reference high frequency signals generated from the second high frequency oscillator and the high frequency signals output from the first high frequency oscillator are mixed together and then are output into the lowpass filter circuit; hence frequency variation generated by micro-mass load can be obtained and be output through the frequency measuring and display device.

The invention discloses a low temperature plasma purification device for automobile exhaust, which comprises a high frequency power supply, a power amplifier, an adapter, a controller and a discharge cavity. The high frequency power supply generates high frequency oscillatory signals from 10KHz to 100KHz. The high frequency oscillatory signals pass through the power amplifier to enlarge power thereof, then is sent to the adapter so as to generate multi-channel high-voltage signals before being sent to the discharge cavity to generate the low temperature plasma; the discharge cavity is arranged inside an exhaust pipe of an automobile. Since the low temperature plasma purification device for automobile exhaust of the invention adopts the low temperature plasma to process hazard substances such as particulate matters, sulfur dioxide, nitrogen oxides, etc. in the automobile exhaust, and introduces advanced power technology, harmful gas removing rate of the invention is not easily influenced by air fuel ratio and the change of working state of engines compared with the traditional automobile exhaust processing technology of three-way catalytic conversion, thus having long service life and low cost.

The invention relates to a method and a device for generating a true random number. The device comprises a high frequency oscillator, an initial seed number generation unit, an error diffusion calculation unit, a linear feedback unit, a control unit and a random number output unit, wherein the output end of the high frequency oscillator is connected with the input end of the initial seed number generation unit; the output end of the initial seed number generation unit is connected with the input end of the error diffusion calculation unit; the output end of the error diffusion calculation unit is connected with the linear feedback unit; the output end of the linear feedback unit is connected with the control unit; and the control unit is connected with the random number output unit. The device achieves a metastable state circuit only by using general logic hardware, so the hardware structure is simplified; one-time-pad is realized by storing an initial seed number in a cache reset at each time; judgment and feedback control are realized by using a generator polynomial; and a secure hash algorithm is realized by using an error diffusion process, therefore, an effect that the random number is difficult to copy or forecast is achieved.

The invention discloses a medical ventilator and a method of continuously measuring airway resistance and compliance for the medical ventilator. The medical ventilator comprises a pressure control device, the pressure control device is provided with an air source input port, an air flow control port and an air flow output port, and the air flow output port is connected with an air flow sensor and a pressure sensor that measures airway pressure of a patient; the medical ventilator employs an airway positive pressure ventilation mode, a high-frequency oscillatory pressure with adjustable amplitude, frequency and duration is added to the pressure level of the airway positive pressure ventilation mode, airway resistance and lung compliance of the respiratory system are measured through the high-frequency oscillatory pressure and flow, the airway resistance and the lung compliance are continuously monitored, and the medical ventilator and the method are used to measure respiratory resistance and compliance at the premise of not interfering normal respiratory cycle of a patient and provide continuous monitoring for the respiratory resistance and compliance. The medical ventilator and the method will help a doctor to set parameters of a mechanical ventilator such that ventilation state of a patient is adjusted in time and ventilation therapeutic efficiency of the ventilator is improved.

A dual frequency damper includes a liquid inertia vibration eliminator (LIVE) portion and a fluid damper portion. LIVE portion and fluid damper portion operate in series and function so that dual frequency damper is optimized in both stiffness and damping at multiple frequencies. LIVE portion acts as a frequency dependent switch to selectively cause low frequency oscillatory forces to be treated primarily by the high spring rate and high damping rate characteristics of the fluid damper portion, and also to select high frequency oscillatory forces to be primarily treated by the low spring rate and low damping rate characteristics of the LIVE unit portion.

The invention discloses a water treatment apparatus, comprising a power converter, an oscillatory circuit device, and a coupling device disposed outside a pipeline. The power converter is used for converting mains supply into direct-current power in a preset voltage range, the oscillatory circuit device is used for producing a high-frequency oscillatory electrical signal by using the direct-current power and supplying the high-frequency oscillatory electrical signal to the coupling device, the coupling device is used for generating high-frequency electromagnetic wave according to the high-frequency oscillatory electrical signal, and the high-frequency electromagnetic wave is used for removing scale in the pipeline. The water treatment apparatus may provide the functions such as descaling, scale inhibiting, sterilizing and algal removal for the pipeline, is convenient to mount with no need for cutting the pipeline open, is low in running cost, small in size, small in floor area, free of contact with water and free of maintenance, can be fully automated for treatment without management by staff, is highly applicable, energy-efficient and environment-friendly, requires little electricity fee each year and is free of environmental pollution.

An entrainment port regulates the flow of gas and/or medicine into an inspiratory limb of a high frequency oscillatory ventilator (H0FOV) to improve the oxygen content of the air entering a patient. The entrainment port is connected to an oxygen source and uses entrained oxygen therefrom to enter the inspiratory limb. Medication and/or admixtures of medication, gas and/or humidification can be introduced through the entrainment port. The flow of entrained oxygen and the mean airway pressure is regulated by a plug valve. A check valve is calibrated to a pre-defined cracking pressure to open and allow the entrained oxygen into the inspiratory limb when negative pressure is asserted in the HFOV circuit by operation of the expiratory cycle of the HFOV.

An FMWC radar sensor for motor vehicles, having a high-frequency oscillator, which is developed to generate a frequency-modulated transmit signal that has a periodically repeating series of modulation sequences having different modulation patterns, and having an evaluation device for evaluating the received radar echo according to the FMCW principle, wherein the series of the modulation sequences includes a special class of modulation sequences whose duration is longer than that of any other modulation sequence not belonging to this class and whose frequency swing is smaller than that of any other modulation sequence, and the evaluation device is developed to carry out a measurement of the ego velocity of the vehicle on the basis of a radar echo that is received from non-moving objects during the modulation sequences that belong to the special class.

The present invention is a biological resonance chip utilizing a human biological micro-wave and coupling resonance technique by consisting of a printed circuit sticker at which at least a biological micro-wave receiver, a high frequency oscillating chip and at least a biological micro-wave transmitter are provided and electrically connected. By the aforesaid configuration, a product made by the printed circuit sticker can be placed at an arbitrary area of a human body from which a human biological micro-wave is emitted, picked by the biological micro-wave receiver, received by the high frequency oscillating chip for amplifying a power level and transmitted by the biological micro-wave transmitter to the human body for improving a health condition thereof. Further advantages of permanent resonance with a human body by a concentrated resonance frequency without a hazard from radiation are also achieved.

The invention discloses a centrifugal reverse molding machine which is provided with a main circuit. The main circuit comprises a main power supply contactor C, a transformer T1, a 7T69 electron tube, a transformer T2, rectifier diodes D1, D2, D3, D4, D5 and D6, a rectifying coil, three low-heat contactors C1, three high-heat contactors C2, three rectifying circuit main contactors C3, a full-wave rectification circuit output ampere meter A1, an overcurrent protection relay I1, a capacitor filtering circuit and a high-frequency oscillating circuit. The high-frequency oscillating circuit comprises a cross-linking capacitor C1, a switch oscillating circuit, a grid ampere meter A2 and a grid bias voltage resistor R1, wherein the switch oscillating circuit comprises an electron tube H, an inductor L1, a capacitor C3 and an inductor L2. The centrifugal reverse molding machine is small in volume and low in cost.

The invention discloses a method for detecting whether a stove on an electromagnetic oven, mainly comprising the following steps: a power supply, a high-frequency oscillating unit, a high-frequency power amplifying unit, a detection amplifying unit, an A/D (analog/digital) detecting unit, an MCU (micro control unit) and a relay output unit form a radio-frequency field generating device; and an antenna matching unit, a rectifying unit, a frequency dividing unit, a comparison unit with a hysteresis characteristic and a temperature sensing unit form a receiving induction device. The method is smart in conception and has the following advantages that: 1) the temperature unit does not influence parameters of the radio-frequency circuit, so that the batch production is convenient; 2) the device is not provided with any storage and operation unit, so that the fault rate is low, and compared with the unit using RFID (radio-frequency identification) control, the work such as initialization and calibration and the like is not required; and 3) the receiving device is not provided with a conversion device with a complex protocol, so that the reliability of the whole system is improved and the promotion value is great.

The invention discloses an ultrasonic washing machine. A filtering barrel is located on one side of a spraying device, the spraying device is connected with the filtering barrel, a moisture discharge port is located in one side of the spraying device, an ultrasonic oscillator is located at the upper portion of a chain, the chain is located below the ultrasonic oscillator, and a rotating device is connected with the chain. By means of the ultrasonic washing machine, a traditional concept of an existing rotating disc stirring type washing machine is broken through, clothes are prevented from not being cleaned thoroughly and prevented from being damaged when washed through the new method. High-frequency oscillatory waves are produced according to the ultrasonic principle, a large number of miniature bubbles are produced between water flow and the clothes, dirt and the clothes are thoroughly separated through air pressure shock waves produced when the bubbles break, and therefore washing is automatically completed, no detergent or less detergents are used, the environmental pollution is reduced, the water resource is saved, and the washing effect is quite good.

The invention discloses a control circuit special for an atomizer in the technical field of atomizers. The control circuit is composed of a control register, a single-chip microcomputer, a high-voltage MOS tube, a diode, a first capacitor, a second capacitor, a first resistor, an inductor, an atomization sheet, a second resistor and a third capacitor. The SDA end of the control register is connected with the SDA end of the single-chip microcomputer. The SCK End of the control register is connected with the SCK end of the single-chip microcomputer. The control circuit special for the atomizer is reasonable in design, high-frequency vibration signals needed for the atomizer scheme can be directly generated, the scheme difficulty can be reduced, the multiple kinds of vibration frequency can be adjusted, and the control circuit adapts to different atomization sheet schemes; the frequency can be fine adjusted, the atomization sheet work efficiency can be improved, the outer mos tube can bedirectly driven, and peripheral elements can be reduced; and the control circuit can be used in cooperation with a conventional single-chip microcomputer, the model selection difficulty can be reduced, and the production cost and the corresponding cost of the single-chip microcomputer are reduced.

The invention discloses high-noise-reduction audio output equipment which comprises an audio control input end, an oscillatory frequency mixing part, a noise elimination part and an audio output part which are connected in sequence, wherein a high-frequency oscillatory circuit and a low-frequency oscillatory circuit in the oscillatory frequency mixing part are connected in parallel and then connected between an oscillatory control circuit and a frequency mixer; the input end of an amplifier circuit in the noise elimination part is connected with the frequency mixer; a negative feedback circuit is used for receiving a signal of the amplifier circuit and feeding back the signal to the amplifier circuit; the output end of the amplifier circuit is connected with the audio output part through a noise elimination circuit; the audio output part comprises a power amplifier output circuit and a loudspeaker which are connected in sequence; the input end of the power amplifier output circuit is connected with the noise elimination circuit; the noise elimination circuit comprises an input circuit, a power amplifier chip and an output circuit which are connected in sequence. The audio output equipment has the benefits of remarkable noise reduction effect and relatively low power consumption.

The invention relates to a cutoff knife mechanism of a cutting machine and a cutting machine with the cutoff knife mechanism. The cutoff knife mechanism comprises a knife handle, a cutoff knife body and a floating rod assembly, wherein the floating rod assembly is arranged in the knife handle and is used for connecting the cutoff knife body; the floating rod assembly comprises a floating part; an accommodating cavity for accommodating the floating part is arranged in the knife handle; the floating part of the floating rod assembly is arranged in the accommodating cavity in a sliding manner and is used for driving the cutoff knife body to carry out reciprocating motion on the table vertical to the cutting machine; a first gas path and a second gas path communicated with the accommodating cavity are also arranged in the knife handle; and the cutoff knife mechanism of the cutting machine also comprises an air supply device for supplying the first gas path or the second gas path with air and a valve element arranged in the knife handle for opening the first gas path or the second gas path. Compared with the prior art, the cutoff knife mechanism has the advantages that high-frequency oscillatory motion of the cutoff knife body is directly achieved through a pneumatic mode, so that a drive device adopting a motor transmission device as the cutoff knife mechanism is omitted and the production cost of the whole cutoff knife mechanism and the whole cutting machine is greatly reduced.

The invention discloses an integrated train axle ultrasonic testing device and method. A high-speed acquisition card, a filter, an amplifier, an integrated ultrasonic angle probe, a driving circuit, a high-frequency oscillator and an I/O card are sequentially connected; the I/O card and the high-speed acquisition card are clamped on a circuit board of an industrial personal computer. The integrated train axle ultrasonic testing device and method solve the problems that the testing effect on interference fit surfaces of a bearing and an axle is poor, or the interference fit surfaces of the bearing and the axle cannot be tested; the integrated ultrasonic angle probe is adopted, so that the environment factor influences are less; through the use of the anti-interference performance in ultrasonic high frequency characteristics, the testing accuracy is improved; the testing device adopts relatively advanced hardware equipment and a software system, so that the testing efficiency is improved greatly.