33 results about "Coupled pulse" patented technology

A biased pulse DC reactor for sputtering of oxide films is presented. The biased pulse DC reactor couples pulsed DC at a particular frequency to the target through a filter which filters out the effects of a bias power applied to the substrate, protecting the pulsed DC power supply. Films deposited utilizing the reactor have controllable material properties such as the index of refraction. Optical components such as waveguide amplifiers and multiplexers can be fabricated using processes performed on a reactor according to the present inention.

A fully alternating current (AC) coupled multi-point, multi-drop or point-to-point bus interconnect uses a low power synchronous pulsed signaling scheme for board-level chip-to-chip communication. A single-ended or differential pulsed signaling transceiver generates a diamond data eye with a small time constant in the pulsed signal. The transceiver includes a high-pass filter or a differentiator circuit network that generates triangle pulses that make the diamond data eye.

The invention provides a method for modifying a metal part by adopting electricity, magnetism and electricity and magnetism coupled pulses. An electricity, magnetism and coupled pulse treatment technology is used for modifying the service performance of the metal parts, coupling is performed on characteristic points of the metal part through the high energy flow density electricity, magnetism andcoupled pulses, acting on the local portion or the whole portion of the metal part in an energy type of particle flows and in a contact or non-contact manner is achieved, it is achieved that the physical property, the mechanical performance, the friction and abrasion performance, the corrosion resisting performance and the like of the metal part are improved, and the purpose of improving the service performance of the metal part is achieved. Due to the method, stress field distribution in the metal part is adjusted in a targeted manner, and the service performance of the metal part is improved.

The invention refers to an airborne ultrasound testing system for test object (3) containing an ultrasound generator (1,9), an ultrasound receiver (2), a controller for both and a computer assisted test result interface to display an image of a tested test object (3). The ultrasound generator (1) is a resonance-free thermo-acoustic ultrasound generator which does not rely on mechanically deformable or oscillating parts and the ultrasound receiver (2) is a membrane-free optical microphone in an air or gas coupled pulse-echo arrangement or in an air or gas coupled transmission mode arrangement. With this testing system, it is possible to test objects with high precision and without liquids or disturbing ringing effects.

A large-size magnetic core sensor and its anti-interference method by descriminating the polarity and ampletude of directionally coupled pulse are disclosed, which can be used for the in-line monitor system of local discharge for transofrmer. The two ends of the winding wound on the said magnetic core is serially connected with high-pass filter capacitor and sampling resistor. Its metal shell can shield the electromagnetic interference. Descriminating the polarity and ampletude of directionally coupled pulse can separate the local discharge from interference.

The invention discloses a photodynamic therapy system with a visualization and light spot boundary display function. According to the system, an optical synchronization module and an optical multiplexing module are additionally adopted; the optical synchronization module performs synchronous chopper modulation on therapy laser through using the exposure and readout time sequence signals of an electronic CCD or CMOS optical system so as to make output pulse therapy laser keep synchronous with an exposure stage and a readout stage, so that the visualization of a tissue image can be realized; an optical coupler in the optical multiplexing module is adopted to couple indication light and the pulse therapy laser; the coupled light and pulse therapy laser are outputted to an tissue through an optical fiber; and since the light emission regions of the coupled pulse therapy laser and indication light are identical, and therefore, the boundary of the therapy light spot can be displayed in real time though identifying the boundary of the indication light spot, and a doctor can intuitively see the position relation of the therapy light spot and the tissue where a lesion exists, and blind manipulation of the doctor by means of experience can be avoided, and the accuracy and safety of therapy can be improved.

A spectroscopic analysis of a sample includes arranging the sample in a resonator cavity for transmitting cavity mode frequencies with a cavity mode frequency spacing, coupling pulsed source light into the resonator cavity, with the source light including source comb frequencies with a source frequency spacing, coupling pulsed transmitted light out of the resonator cavity, and spectrally resolved detecting the transmitted light with a detector device. The cavity mode frequency spacing and the source frequency spacing are detuned relative to each other, so that the transmitted light includes transmitted comb frequencies with a spacing larger than the source frequency spacing. The detecting feature includes collecting spectral distributions of the transmitted light in dependence on relative positions of the cavity mode frequencies and the source comb frequencies. The cavity mode frequencies and the source comb frequencies are varied relative to each other and different transmitted comb frequencies are individually resolved.

The embodiment of the invention provides a method and system for detecting the partial discharge of an air core reactor and relates to the technical field of partial discharge detection, and the partial discharge of a dry type air core reactor can be detected. The concrete scheme comprises a step of loading testing voltage to the air core reactor, a step of allowing a detection circuit to be in parallel connection with the air core reactor, wherein the detection circuit comprises a coupling capacitor and a detection impedor in a series connection, the coupling capacitor is used for coupling pulse current which is generated by the air core reactor in partial discharge, and the detection impedor is used for converting the pulse current detected by the coupling capacitor into a pulse voltage signal, and a step of determining the discharge amount of the air core reactor in partial discharge according to the pulse voltage signal outputted by the detection circuit. The method and the system are used for detecting the partial discharge.

The invention discloses an electric quantity isolation sensor which comprises a pulse width modulation (PWM) closed-loop modulation circuit, a transformer and a PWM demodulation circuit, wherein the PWM closed-loop modulation circuit is used for generating a PWM modulation signal by using closed-loop control according to a direct current input signal; the transformer is used for coupling pulse information in the PWM modulation signal to the PWM demodulation circuit; and the PWM demodulation circuit is used for demodulating the pulse information to obtain and output a direct current output signal. The electric quantity isolation sensor provided by the invention adopts a closed-loop PWM modulation mode, linear pulse width modulation of the direct current input signal to the PWM modulation signal is achieved, the high isolation of the electric quantity isolation sensor is achieved, and the accuracy and the reliability of the electric quantity isolation sensor are improved.

The invention relates to a cable anti-theft monitoring method and system and a computer readable storage medium. The method comprises the following steps: coupling pulsed light to a single-mode optical fiber to generate backward Rayleigh scattering in the single-mode optical fiber; receiving the backward Rayleigh scattering reflected by the single-mode optical fiber, and acquiring a vibration signal distributed along the single-mode optical fiber according to the pulsed light and the backward Rayleigh scattering; obtaining an intrusion position of a to-be-tested cable according to the pulsed light and the backward Rayleigh scattering, and inputting the vibration signal into a prediction model to obtain an intrusion type of the to-be-tested cable; according to the intrusion position and theintrusion type, outputting corresponding alarm information according to a preset alarm strategy. The intrusion type of intrusion time can be accurately acquired by using a prediction model, the identification accuracy of an intrusion event is improved, and meanwhile, a corresponding alarm signal can be output according to the intrusion event to warn a worker.

The invention discloses an ultrasonic-based tibial bone mineral density detection system and method. The system comprises an ultrasonic transmission driving circuit, an ultrasonic probe, a receiving circuit and a data acquisition card, wherein the ultrasonic transmission driving circuit transmits a control signal to drive the ultrasonic probe to work; the ultrasonic probe generates pulsed ultrasonic waves which are coupled and enter the cortical layer of the middle section of a tibia; the ultrasonic reflection signal of the coupled pulsed ultrasonic waves is received by the ultrasonic receiving probe and converted into a weak electric pulse signal by a piezoelectric wafer; then the weak electric pulse signal is amplified by the receiving circuit and then filtered and transmitted to an oscilloscope; processing is performed on the weak electric pulse signal so as to obtain a usable electrical signal; and the data acquisition card acquires the usable electrical signal to a PC for data processing. In virtue of an ultrasonic technology, the data acquisition card acquires date according to the actual need for an ultrasonic propagation velocity in detection of the cortical bone of the tibia, the time value of the ultrasonic propagation in the tibia is extracted based on the acquired signal, and the value of bone mineral density is calculated according to a formula. The entire operation system is simple in structure; and the calculation method is easy and has high accuracy.

The invention discloses a pulse wave velocity correction method for partial discharge monitoring of a high-voltage cable, and the method comprises the steps: firstly injecting a coupling pulse into agrounding connector of a three-phase cable in a current grounding box based on electromagnetic coupling, and then collecting the coupling pulse at the grounding connector of the three-phase cable in an adjacent grounding box of the current grounding box; calculating the pulse wave velocity according to the length of the cable and the coupling pulse transmission time, fitting the load of the three-phase cable and the coefficient of the pulse wave velocity to the wave velocity load curve, and finally correcting the pulse wave velocity under the real-time load through the fitted wave velocity load curve to obtain the corrected pulse wave velocity. The correction pulse wave velocity is used for partial discharge positioning, so that the positioning result is more accurate. The pulse wave velocity can be accurately corrected according to load fluctuation, and accurate positioning of the partial discharge position is facilitated.

The invention provides a process method for improving fermenting property of cAMP (cyclic adenosine monophosphate) with polyphosphate. According to the related method, cAMP is produced with a processof adding a precursor substance and polyphosphate in a batch fermentation coupled pulse manner, and a fermentation strain is Arthrobacter sp. A. sp01 with the collection number of CCTCC NO:M2013431. After batch fermentation reaches a logarithmic phase (20-40 h), 1-5 g/L of polyphosphate is added once, and 1-5 g/L of the precursor substance is supplemented every 4-15 h and added 3-6 times in total.By means of the process method, the yield of cAMP is increased to 2.18 times that of an original process, the production efficiency is 119.5% higher than that of the original process, and the fermentation performance is significantly improved. The method has the advantages that addition of polyphosphate ensures supply of energy in the whole fermentation process, the pulse type addition strategy can keep the concentration of the precursor substance in a fermentation broth at the level of 1-5 g/L, the inhibition phenomenon can be avoided, and product synthesis cannot be affected by lack of theprecursor, so that the fermentation performance of cAMP is greatly improved.

The invention discloses a three-level gas coupled pulse pipe refrigerator designing method based on circuit analogy and entropy analysis. The method totally comprises five steps that firstly, a three-level gas coupled pulse pipe refrigerator structural model is established; secondly, a three-level gas coupled pulse pipe refrigerator circuit analogy model is established; thirdly, temperature distribution in a heat regenerator is calculated through an enthalpy flow analysis method; fourthly, the refrigerating capacity of a three-level gas coupled pulse pipe refrigerator is solved through an entropy analysis model; and fifthly, related work parameters and part sizes are optimized. According to the three-level gas coupled pulse pipe refrigerator designing method, various irreversible losses can be obviously reduced, the refrigerating efficiency of the system is improved, and the three-level gas coupled pulse pipe refrigerator designing method is of great significance in practical development of the three-level gas coupled pulse pipe refrigerator.

The invention discloses a high voltage coupling pulse generator and a time-of-flight mass spectrometer, wherein the pulse generator comprises a switching on/off driving module, a first input module, a second input module, a high-voltage coupling module, a first output module, a second output module, a wave filtering voltage stabilization module and a current-limiting wave filtering module; the switching on/off driving module comprises a driving input end, a resistor AR1, a resistor R1 and a triode; the first input module comprises a first input terminal, a plurality of first current limiting resistors, and a charging capacitor; the high-voltage coupling module comprises a plurality of high-voltage capacitors; one end of the high-voltage coupling module is a first end and the other end of the high-voltage coupling module is a second end; the first end is connected with the collector of the triode; the second input module and the first output module are both connected with the second end; the current-limiting wave filtering module is connected with the second end; the second output module comprises a second output terminal and fourth current limiting resistors; one end of the wave filtering voltage stabilization module is connected between adjacent fourth current limiting resistors, and the other end of the wave filtering voltage stabilization module is grounded. A circuit structure in the invention is complex and output waveforms are stable.