Showing papers on "Impulse generator published in 2017"

Energy storage features and a predictive model for switching impulse flashover voltages of long air gaps

Abstract: It has been a long sought goal to determine the critical flashover voltages of long air gaps by mathematical calculations instead of experiments. In this paper, a predictive model is proposed for 50% discharge voltage (U50) prediction of long air gaps subjected to switching impulses. This model is developed on the basis of the physical thought that air breakdown can be viewed as out-of-limit of the capacitive energy stored in the electric field. Two groups of features are defined to characterize the energy storage status of an air gap, from the perspective of electric field distribution and impulse voltage waveform, respectively representing the space distribution and time accumulation of the energy. The predictive model is established by support vector machine (SVM), and the input data are the energy storage features. Giving an estimated applied voltage range, the predicted result of the critical flashover voltage is searched by the golden section method. Trained by 6 known experimental data, this model is used to predict the U50 of rod-plane, rod-rod and rod-conductor long air gaps subjected to negative switching impulse voltages. The mean absolute percentage errors of 5 groups of test samples are respectively 6.0%, 5.8%, 6.3%, 3.2% and 1.7%, which are in an acceptable range in the view of engineering applications. The proposed method might be useful to predict the U50 of long air gaps with various geometries and under different voltage waveshapes, therefore reducing the required test work for insulation design of high voltage equipments.

Breakdown characteristics of transformer oil in a uniform field under oscillating impulse voltage

Abstract: The field impulse voltage test plays the most important role to ensure the safe of the power transformer. It is hard to carry out the standard impulse voltage test for the power equipment because the generator is very huge. The oscillating impulse voltage waveform has high efficiency and be recommended by IEC 60060-3 as the field test waveform. Transformer oil is the main insulation part of power transformer insulation system. The insulation characteristics of transformer oil under different type impulse waveform have great influence to the design, operation and test amplitude for the power transformer. This paper focuses on the breakdown characteristics of transformer oil in a uniform field under oscillating impulse voltage (OIV). Three type oscillating impulse voltage waveforms with oscillating frequency of 14, 117 and 373 kHz were adopted as the test waveforms. The standard lightning impulse (SLI) voltage was also adopted as the reference waveform. The experiment results show the breakdown waveforms have large oscillation under OIV but little oscillation under SLI for the influence of circuit inductor. The minimum breakdown voltage increase with the increase of oscillating frequency and the 117 kHz impulse waveform has the similar breakdown voltage with SLI waveform. The voltage-time distributions were obtained through lab test and the results shown that the OIV have the longer time lag than SLI for the influence of the oscillation of waveform. The experimental results were explained through streamer mechanism. The study provides the foundation for the field impulse test using oscillating impulse waveform.

Breakdown characteristics of SF6 in quasi-uniform field under oscillating lightning impulse voltages

Abstract: The field impulse voltage withstand test plays one of the most important roles to ensure the safety of the gas insulated equipments. It is hard to carry out the standard impulse voltage test for the equipments because the generator is very large and difficult to transport. The oscillating impulse voltage waveform has high efficiency and has been recommended by the IEC 60060-3 as the field test waveform. SF6 gas is the insulation medium of gas insulated equipments. Its insulation characteristics under different types of impulse waveforms have great influence to the design, operation and test amplitude. This paper focuses on the breakdown characteristics of SF6 gas in a quasi-uniform field under oscillating impulse voltages (OIV). Four types of oscillating impulse lightning voltage waveforms with oscillating frequency of 100, 200, 300 and 400 kHz were adopted as the test waveforms. The standard lightning impulse (SLI) voltage was also adopted as the reference waveform. A calculation model is established to explain the results. The experiment and calculation results show that the breakdown waveforms in time domain drop quickly and then have a recovery with low amplitude to zero under OIV for the influence of circuit inductor. 50% probability breakdown voltages (BDVs0%) under OIV are higher than that under SLI. The minimum breakdown voltage and BDVs0% both increase with oscillating frequency. The voltage-time distributions show that breakdowns under OIV occur in the vicinity of each wave peak of the applied voltage. OIV have a longer time lag than SLI due to the oscillation of the waveforms.

Electric energy synthesis device and method of impulse generator

Abstract: The invention provides an electric energy synthesis device of an impulse generator, which is used for supplying at least one load The electric energy synthesis device comprises a movement part, a shell body, at least one impulse generation device, at least one electric energy storage device, at least one switch and at least one voltage converter The impulse generation device is arranged in the shell body; the movement part is in rotatable contact with the impulse generation device at the upper part of the shell body, so that primary induced electric energy and secondary induced electric energy are generated respectively in pressing and resetting processes An input end of the voltage converter is electrically connected with the switch and the electric energy storage device; an output end of the voltage converter is electrically connected with the load, so that the energy is supplied to the voltage converter by controlling the electric energy storage device through the switch, and the working electric energy of the load is provided

Breakdown characteristics of transformer oil insulation under impulse voltage with different waveform parameters

Abstract: This paper conducts an experimental investigation about the breakdown in transformer oil under the action of impulse voltages with different waveform parameters for the insulation of the transformer in field may be subjected to the lightning and switching overvoltage. In the paper, an impulse voltage generator is built based on the solid state switch and it can produce different kinds of impulse voltage. Five different impulse voltage waveforms are used: 1.4/50µs, 11/210µs, 60/700µs, 130/1700µs and 250/2600µs. Then the breakdown tests are carried out under these impulse voltages. Specifically, a needle plate electrodes immersed in the bulk of the transformer oil is used to form a nonuniform electric field gap. The different radii of curvature and different gap distances of the needle plate electrodes are also taken into consideration in order to determine the properties of breakdown electric field strength. The impulse voltage is increased step by step with a step increment of 2 kV for positive polarity (1 shot/step) until the oil gap breakdown takes place. The description of discharge and breakdown in the oil gap is obtained by the measurement of impulse voltage, transient currents and the emitted light. Meanwhile, the breakdown voltage and breakdown time for impulse voltages with different waveform parameters are obtained. And the average velocity of streamer propagation is deduced. The results show that the breakdown voltage is closely related to the front time of the impulse voltage, the gap distance and the radii of curvature of the needle electrode. The propagation time of the streamer increases with the increase of the impulse front time, also the breakdown time delay has the same characteristic. The factors that influence the gap breakdown voltage are finally analyzed and discussed.

Volt–Time Curve Prediction of Distribution Insulators Under Standard and Typical Lightning Overvoltages Using the Disruptive Effect Method

Abstract: Through the development of detection and measurement systems for lightning strokes, the possibility arose for the identification of the characteristic parameters of lightning current and the resulting voltage waveforms that stress the power system insulating equipment. The real lightning voltages that stress the insulation may vary over a wide type of waveforms and may also differ significantly from the standard 1.2/50 $$\upmu \hbox {s}$$ lightning impulse voltage. Therefore, the prediction of volt–time characteristics of any insulating material for such non-standard voltages is required for a proper insulation design. In this regard, this paper aims at evaluating the dielectric behaviour of medium voltage insulators subjected to voltage impulses with standard and non-standard waveforms, by applying the disruptive effect method. The non-standard lightning overvoltage waveforms considered in this study were based on lightning overvoltages produced by real return stroke current waveforms observed on conveyed measurement data. The investigation involves a comparison between measured and predicted voltage-time characteristics of insulators, considering single-peaked and double-peaked non-standard impulsive voltage waveforms as well as the standard lightning impulse voltage. Three different types of insulating arrangement involving 15- and 25-kV pin-type porcelain insulators were investigated. The estimation of the parameters required for this prediction method was performed using a simulation language available at ATP/ATPDraw software called MODELS.

Characterizations of a single rod electrode under high impulse currents with different polarities

Abstract: Under high impulse currents, an earthing system exhibits different impulse characteristics depending on the shape and/or design configuration of the earthing system. These characteristics have been seen to be different with respect to its steady-state as highlighted in many studies. Furthermore, in order to ascertain that a correct design of an electrical system is achieved, it is important to evaluate the impulse characteristics of the earthing system under high impulse conditions. So far little emphasis has been given in previous publications to investigate the characteristics of earthing systems under high impulse conditions by field measurements. For this reason, a rather efficient and reliable technique to solve this problem is by conducting a practical analysis (field experiment). This paper investigates the characteristics of a single rod electrode under high impulse conditions by field measurements under different polarities. The single rod is selected in this paper for its simple configuration and installation. It was observed in this study that the resistance of the single rod earthing system was seen to reduce with increasing current magnitudes for both polarities and negative polarity has higher impulse resistance than that of positive polarity.

Signal analysis and phantom experiments for a miniaturized time-domain microwave breast health monitoring device

Abstract: This work presents a miniaturized system for performing time-domain microwave scans to detect malignancies within breast tissue The proposed changes miniaturize components of the system designed by the McGill Breast Cancer Detection Group The aim of this paper is to present the implementation of the Adafruit Si5351 Clock Generator and the Furaxa Pulser as an alternative to the currently used large table-top and expensive Tektronix gigaBERT 1400 Clock Generator and Picosecond Model 3600 Impulse Generator respectively The miniaturized and cost-effective components can be integrated to achieve a comfortable and compact medical imaging device This paper validates the proposed changes to the system by comparing their signals at the relevant stages of the system Moreover, a dataset is collected with the proposed system changes using realistic breast phantoms across a five day period

Sterilization of escherichia coli by Marx circuit with switches using bipolar junction transistors

Abstract: High electric field pulse sterilization is one of nonheat sterilization, and is a new sterilization technique for liquid food. In this sterilization method, we apply high voltage pulses to liquid food. The general impulse generator is the Marx circuit. The impulse generator with the spark gap switch has two disadvantages; the charge time is long and the rise rate of applied voltage is slow. In this study, we report the sterilization of Escherichia coll by Marx Circuit with Switches Using Bipolar Junction Transistors (BJT). The experimental sample is 1.0 ×10−3 mol/L NaCl aqueous solution containing E. coli. We applied pulse voltage to the sample by the 10 stages Marx circuit with switches using BJT 2SC2824. The pulse interval is 1 seconds. The survival number of E. coli was counted by the colony counting method. As the results, the survival number of E. coli was decreased with the increase of the number of pulses. We estimated the survival number of E. coli by sterilization mechanism for high electric field pulse. The experimental results of survival number disagreed with the calculated values.

Reconfiguration of 3 MV Marx Generator into a Modern High Efficiency System

Abstract: High voltage impulse generators are intended to last for long periods of time. Upon reaching the end of their technical lifetime, decisions concerning decommissioning, replacement, refurbishment or upgrading are needed. A new generator is a considerable investment. Significant reductions in material and labor costs can be made by repurposing still functional elements of the existing generator and redesigning the circuit for higher efficiency requiring fewer components. This paper describes the process of refurbishing the Mississippi State University (MSU) High Voltage Laboratory 3 MV, 56 kJ impulse generator originally built in 1962 into a modern digital impulse generator system.

Numerical control laser processing system

Abstract: The utility model discloses a numerical control laser processing system, including central processing unit, PLC controller, servo driver, servo motor, memory, USB interface module, analog input/output module, converter, spindle motor, hand impulse generator, laser emergence module and touch screen, central processing unit's first output and hand impulse generator's input are connected, central processing unit's the second output and the input of laser emergence module are connected, central processing unit's third output is through servo drive module and then be connected to the input of servo motor module The utility model discloses an increase hand impulse generator to made things convenient for operating personnel's adjustment to measure, moreover the utility model discloses still be provided with USB interface module to can carry out the communication through USB interface module, it can only be in on -the -spot editor program 's limitation to break operating personnel The utility model discloses but the wide application is in numerical control system

Influence of impulse wave front time on flashover characteristics of coaxial bus line of 220kV GIS

Abstract: In order to find out the detection effectiveness of GIS insulation defects when suffering different overvoltages, a coaxial bus line of 220kV with a needle attached to it was established as an experimental sample to simulate the practical condition that there existed a metallic particle on the bus line of real GIS. Research was carried on with the help of 1MV steep-fronted impulse generator. By changing the wave front resistance of Marx generator, different kinds of double exponential impulse voltages could be produced. Influence of wave front time (t f ) on 50% discharge voltage (U 50 ) and voltage-time (v-t) characteristic of GIS was studied in this article. Results indicate that with t f increasing, U 50 presents an increasing tendency overall; with pressure (P) increasing, when t f is short, U50 hardly changes with P, but when tf becomes long enough, U 50 changing with P appears as a hump curve. As for v-t characteristic, it turns out that, with the length (l) of needle decreasing, both breakdown voltage and its dispersibility increase; it's also found that the shorter the needle is, the shorter delay that turning point occurs becomes. When tf changes, shape of v-t characteristic changes too, the v-t characteristic integration of different wave front times looks like a concave basin. The above phenomena are explained in the view of the ionization, diffusion and recombination of space charges.

Low pressure scratch start and clearance distance adjustable power frequency continuous current test device

Abstract: The utility model relates to a low pressure scratch start and clearance distance adjustable power frequency continuous current test device, include that impulse generator system, voltage measurement system, luo shi coil, suspension insulator, arrester do not have gap section, last spheric electrode, electrical power generating system is tested to spheric electrode, striking fuse, power frequency down. Air gap between the upper and lower spheric electrode has added the striking fuse, and the influence that power frequency side electrical power unit received the impulse voltage effect is showing and descends. Upper and lower spheric electrode is passed through the staple bolt gold utensil and is fixed on suspension insulator, has realized freely adjusting of clearance distance. Adopt the device's concrete testing method: to adjusting in clearance between the upper and lower spheric electrode, power frequency voltage is exported to installation striking fuse, output impulse voltage, and it is experimental to carry out 5 tests, changes clearance distance, and the evaluation test result confirms that optimal clearance distance designs. The test device and method for has shortened test duration, has improved test efficiency, has strengthened experimental rigorous degree, the effectual degree of accuracy of having guaranteed the experiment.

Multichannel output high pressrue impulse generator based on new construction switch

Abstract: The utility model discloses a multichannel output high pressrue impulse generator based on new construction switch, including the oil tank, be provided with transparent window on the oil tank cover plate of oil tank, be provided with on transparent window and just fill electric pile, negative electric pile and the external trigger end of filling the oil tank in install gaseous trigger switch. Adopt neotype air trigger switch, the gaseous trigger switch structure of its bipolar electrode for move more stably, the structure is more compact, the output pulse climbing is fast, can reach 50kVns, expand to the output of tens of ways easily, main switch of multichannel under unified use, multichannel output synchronization nature is good.

Study on PD detection method in GIS under oscillating impulse voltage based on UHF method

Abstract: In order to ensure the safe operation of the gas insulated switchgear (GIS), on-site impulse withstand voltage test is becoming more and more important. Oscillating impulse voltage (OIV) is very suitable for the test due to its high efficiency. By detecting the partial discharge (PD) when conducting on-site impulse withstand voltage test, the insulation state of GIS can be known overall. The pulse current, ultrasonic, and ultra high frequency (UHF) are the mainly PD detection methods up to now. Among them, the UHF method is the most suitable method to detect the PD under OIV. However, there are electromagnetic interference signals generated by the impulse voltage generator which will influence the UHF detection results during the on-site impulse withstand voltage test. In this paper, the interference signals for the PD detection using UHF methods are analyzed. Based on this, an interference elimination method by using multiple UHF sensors for PD detection under OIV is introduced. This method is tested both in a lab environment and in field. The analyses show the interference signals for the PD detection using UHF methods under OIV is mainly related to the sphere-gap switch of impulse voltage generator. The results of lab experiments and field tests both show that the interference elimination method by using multiple UHF sensors is suitable for the PD detection under oscillating impulse voltage.

Discharge electron temperature's measurement system of long air gap thunderbolt

Abstract: The utility model discloses a discharge electron temperature's measurement system of long air gap thunderbolt relates to the power systems technology field for obtain the higher deep multiple abscess of precision guide the conversion process's electron temperature improves the degree of going deep into of the physics mechanism research of discharging under the long air gap lightning impulse, finally improves electric power system's anti -thunder capability. Discharge electron temperature's measurement system of long air gap thunderbolt includes: impulse generator, capacitive voltage divider, measuring resistance, first leg electrode and be located second leg electrode, spectrum appearance, ICCD camera and the oscilloscope of first leg electrode top. The utility model provides a discharge electron temperature's measurement system of long air gap thunderbolt is used for the research of electric power system's thunder and lightning defence.

Amazing device of implanted vagus nerve binary channels

Abstract: The utility model provides an amazing device of implanted vagus nerve binary channels, relates to medical equipment technical field, and that solve is the technical problem who improves amazing effect, security and reduce the operation degree of difficulty. The device includes electro photoluminescence impulse generator, connects electro photoluminescence impulse generator's sign detection module, and two implantation units, implanting the unit and including wound form location anchor, flexible electrode big envelope, and two wound form electrodes that polarity is different, wound form location anchor is wherein fixed on the electrode big envelope through a flexible connection bridge, and the both sides of wound form location anchor are placed in to two wound form electrode branches, the electric lead wire of two wound form electrodes pass respectively the electrode big envelope and with electrode big envelope rigid coupling, two amazing impulse output terminal mouths of electro photoluminescence impulse generator are received respectively to two electric lead wires of implanting the wound form electrode in the unit. The device provided by the utility model, be applicable to and implement the electro photoluminescence to vagus nerve.

Electric filed intensity of the lightning strikes on lightning air terminals installed on building structures

Abstract: Lightning activities are growing up rapidly with global warming. It can affect anything on the earth. All the constructed buildings need proper protection from the harmful effect of lightning. Lightning strike points on different geometrical shapes have been investigated. Lightning strike distribution of different building structure is very important to be studied. In order to analyse the maximum effect of lightning strike pattern is obtained of different air terminals installed on scaled building structures. High voltage impulse generator is used in order to get the impulse voltage. Different numbers of air terminals have been applied to all the shapes in order to see the lightning strike points. Electric field is obtained in order to see its minimum and maximum effect on the entire building structure. Interestingly the phenomenon of lightning air terminal bypasses has been proved in this paper.

Soil water content surveys device based on dielectric constant

Abstract: The utility model relates to a soil water content surveys device based on dielectric constant, it includes impulse generator, impulse generator links to each other with pulse distributor, pulse distributor links to each other with ondograph and triport circulator simultaneously, the triport circulator passes through coaxial cable and links to each other with the probe, the triport circulator links to each other with ondograph simultaneously. This device can be accurate the water content of measurement soil.

Light intelligent controller

Abstract: The utility model discloses a light intelligent controller, including ARM microprocessor, signal pickup assembly and touch display screen, signal pickup assembly's output passes through AD converting circuit and ARM microprocessor's input electric connection, PWM impulse generator electric connection has the constant current source circuit, the gating chip passes through gating signal with the constant current source circuit and is connected, constant current source circuit electric connection is in the LED lamp, ARM microprocessor's output electric connection has wireless communication module, wireless communication module's communication interface signal connection in remote monitoring terminal. This light intelligent controller can avoid the harmonic to ARM microprocessor's harm through high -speed wave filter, reinforcing ARM microprocessor's stability, consequently the utility model relates to a rationally, simple structure, can the using electricity wisely with can be to transformation of color of LED lamp and adjustting of the lighteness, satisfy the needs of people's life.

Cleaning machine warms up to numerical control dipulse

Abstract: The utility model discloses a cleaning machine warms up to numerical control dipulse, shift knob and remote control unit all are connected with timer no 1, timer no 2, timer no 1 is connected with impulse generator no 1, impulse generator no 1 is connected with solenoid valve no 1, solenoid valve no 1 is connected with check valve no 1, timer no 2 is connected with impulse generator no 2, impulse generator no 2 is connected with solenoid valve no 2, solenoid valve no 2 is connected with check valve no 2, check valve no 1, check valve no 2 all wash the exit linkage with pulsed high voltage, the utility model discloses among the compressed air and water input impulse generator that provide the compressor, according to the physics pulse ripples of washings needs by pulse control ware control transmission different frequency and wavelength, strikeing the inner wall of wash line and shaking with the microwave, the rust deposite and the intraductal thing that stockpiles of drop tube inner wall are shelled to the successive layer to the management end is got rid of fast, and it is clean with floor heating pipe rinse thoroughly to work repeatedly

The role of IEC 60034-27-5 for IEC 60034-18-41: Offline PD test methods with repetitive impulse voltage

Abstract: This paper reviews relevant published IEC standards on converter-fed motor insulation and discusses some technical issues on offline PD tests methods with repetitive impulse voltage of IEC60034-27-5. In order to qualify PD-free insulation system for IEC 60034-18-41, the detail of PD testing method should be fixed as possible in IEC 60034-27-5, while there are still arbitrary factors in PD measurements: how to select impulse generator, tolerance against deformation and so-called ringing of impulse waveform, how to decide thresholds values for PD detection against disturbance from impulse generator and selection of RPDIV or PDIV for pass criteria judgements of IEC 60034-18-41.

Continuous punching press counting assembly of lathe

Abstract: Continuous punching press counting assembly of lathe. The utility model provides a count accurate continuous punching press counting assembly of lathe is counted according to actually processing the number of times. Continuous punching press counting assembly of lathe locates the punching machine bed, including proximity switch, speedtransmitter, controller, impulse generator sum counter, proximity switch, speedtransmitter and impulse generator are connected respectively to the controller, the last electromagnetic switch no. 1 that is equipped with of impulse generator, electromagnetic switch no. 2 establishes ties on the electromagnetic switch no. 1, electromagnetic switch no. 1 and two difference connection director of electromagnetic switch. The utility model discloses the lathe detects the velocity of movement of lathe cope match -plate pattern at normal during operation, speedtransmitter, transmits the speed detection value and compares for controller and the speed given value that prestores in the controller, and the controller judges whether the lathe is in normal operating conditions, and when being in normal operating conditions, control pulse generator sends pulse signal, and the counter detects pulse signal and once counts with regard to accomplishing.

Bipolarity impulse generator based on but control magnet switch

Abstract: The utility model provides a bipolarity impulse generator based on but control magnet switch, but includes charging loops, pulse shaping topology control magnet switch full -bridge, magnetism on -off control return circuit. Charging loops includes alternating current power supply AC, parallelly connected two polypropylene film condensers, and alternating current power supply AC is through two diodes to two parallelly connected polypropylene film capacitor charges. The pulse shaping topology comprises two PFN modules, but the pulse shaping topology is used for discharging in turn the pulse of production unipolarity repetition frequency to control magnet switch full -bridge. But control magnet switch full -bridge for with the pulse signal of unipolarity repetition frequency pulse contravariant for the bipolarity transition, supply with load RL. Magnetism on -off control return circuit for apply the dc magnetic biasing signal to the magnetic switch before pulse signal arrives, make the magnetic switch get into critical saturated condition. The utility model relates to a bipolarity impulse generator based on but control magnet switch, its contravariant part need not semiconductor device, has reduced the circuit and has realized the cost, has improved system reliability.

Device is hurtd to low latitude unmanned aerial vehicle microwave

Abstract: The utility model relates to a high power microwave field, especially a simple structure, convenient to use just hurt effectual device is hurtd to low latitude unmanned aerial vehicle microwave. It is including the high voltage unit, high energy impulse generator, multistage oscillator and the emit antenna that connect gradually. The utility model discloses a device is hurtd to low latitude unmanned aerial vehicle microwave, through high voltage unit, high energy impulse generator, multistage oscillator and emit antenna's etc. Cooperation, let emit antenna launch the high energy microwave, carry out non -contact long -range attack unmanned aerial vehicle's electronic system and shooing of carrying, the recording, electronic equipment such as video recording, its mechanism is the radiation coupling effect that utilizes high power microwave pulse, respond to a pulse voltage who far above its rated operational voltage value on the circuit that makes target electronic equipment and the component, the realization destroys the permanence of target, reach and hurt the unmanned aerial vehicle mesh, and is simple in structure, convenient to use just hurts effectual characteristics.

Lathe punching press counting assembly

Abstract: Lathe punching press counting assembly. The utility model provides a count accurate lathe punching press counting assembly is counted according to actually processing the number of times. Lathe punching press counting assembly locates the punching machine bed, including acceleration sensor, controller, impulse generator sum counter, acceleration sensor locates on the cope match -plate pattern of punching press lathe, acceleration sensor connection director, impulse generator is connected to the controller, impulse generator linkage counter. The utility model discloses an acceleration of acceleration sensor detection tool in the stamping process, when the acceleration reached the definite value, the controller just provided a control signal, and control pulse generator sends a pulse, and the completion was counted after the counter detected the pulse the utility model has the advantages of count according to actually processing the number of times, the accurate just convenient to use of count, application scope are extensively.

Physiology electricity impedance feedback therapeutic instrument

Abstract: The utility model discloses a physiology electricity impedance feedback therapeutic instrument, include: the detecting head, the lid main part, the circuit board, the circuit board is equipped with handles chip, impulse generator, pulse width modulator, amazing pulse amplifirer, signal shaper, time phase discriminator and conditioning signal clipper -limiter, handles the chip and is used for receiving the control command of customer end, and impulse generator is used for producing pulse signal, and pulse width modulator is used for carrying out the pulsewidth modulation to pulse signal, and amazing pulse amplifirer is used for enlargeing the processing to pulse signal, the signal shaper is used for carrying out the signal standardization in order to reject unnecessary interference pulse to physiology electricity impedance parameter, the time phase discriminator is used for becoming data signal with the analog signal transition that physiology electricity impedance parameter corresponds, the conditioning signal clipper -limiter is used for carrying out the amplitude limiting adjustment to data signal to the pulse signal's of control impuls generator range. In this way, the utility model discloses a therapeutic instrument is good with skin surface contact, can accurate physiological feedback electricity impedance parameter.

80-GHz impulse radio receiver with quadrature PPM demodulation in 55-nm CMOS technology

Abstract: This paper presents a quadrature pulse-position modulation (Q-PPM) impulse radio (IR) system, and its novel transceiver architecture for E-band wireless communications. In the Q-PPM IR system, the wavelet of the transmitted signal is time-shifted by multiples of 3 ps from the periodic base position. This paper focuses on the receiver architecture for demodulation of the Q-PPM IR signal. The principle and a detailed analysis of the demodulation scheme are described. The integrated receiver chip was developed in 55-nm CMOS technology. It includes all circuit blocks based on the proposed demodulation architecture, which consists of an in-phase/quadrature (IQ) demodulator, a symbol clock recovery circuit, and a local impulse generator. A measured conversion gain of about 4 dB in the 81–86-GHz frequency band is achieved.

Implanted impulse generator's detecting system

Abstract: The utility model provides an implanted impulse generator's detecting system, link to impulse generator's interface converter including the electricity to switching impulse generator and organizing the connection of module to the equivalence, the electricity is even to interface converter's equivalence tissue module, and with the electrical characteristic that the anthropomorphic dummy body group was knitted, the signal generator of module is even organized to the electricity to the equivalence, and in order producing the experimental signal of telecommunication, and the electricity is even to the equivalent oscilloscope who organizes the module, with viewing test signal and impulse generator's state