66 results about "Pulse modulator" patented technology

The invention provides a miniaturized coherent laser wind speed remote measuring instrument and an assembling method thereof.The miniaturized coherent laser wind speed remote measuring instrument comprises an integrated optical module, an optical driving module, a master control processing module and an amplifier, and the integrated optical module comprises a seed laser, a semiconductor optical amplifier and an optical chip; the optical chip adopts a laser radar photon chip and comprises a transmitting link and a receiving link, the transmitting link comprises a beam splitter and a pulse modulator, and an optical mixer and a balance detector are integrated on the receiving link; the integrated optical module is packaged through a photoelectric hybrid packaging technology; and the main control processing module is a high-speed signal acquisition processing module. Through high-density photoelectric hybrid integration, the coherent laser wind speed telemeter is small in size and light in weight, the weight does not exceed 2 kg, and long-distance detection can be guaranteed.

To provide a controller circuit of a DC / DC converter in an improved current mode.SOLUTION: An error amplifier 210 generates an error signal EOUT by amplifying error between output voltage VOUT of a DC / DC converter 100 and a target voltage thereof. A pulse modulator 220 in a current mode generates a pulse signal TON based on the error signal EOUT and a current detection signal CSNS indicating coil current IL of the DC / DC converter 100. A current ripple detection circuit 240 generates a peak current detection signal PEAK indicating a peak of the coil current IL and a valley current detection signal VALLEY indicating a bottom of the coil current IL.SELECTED DRAWING: Figure 3

The invention belongs to the technical field of atmosphere detection remote sensing, and discloses an atmosphere multi-element integrated multi-wavelength coherent differential absorption laser radar system. Lambda on1 wavelength laser generated by the first frequency stabilization seed laser, lambda on2 wavelength laser generated by the second frequency stabilization seed laser and lambda off wavelength laser generated by the third frequency stabilization seed laser are transmitted to the switching module for time domain modulation to obtain an output signal, and the output signal is decomposed into local oscillation light and a main signal by the first coupler. A main signal is modulated by the pulse modulator, amplified by the amplification module and then transmitted to the optical transceiver module, backward scattered light scattered by the atmosphere is transmitted to the second coupler and is subjected to coherent coupling and equalization with local oscillation light, and coherent electric signals are transmitted to the data analysis module through the balance detector to be analyzed. The water vapor concentration, the wind speed and the atmospheric temperature in the propagation path are obtained. Through the coherent detection technology, the signal-to-noise ratio of signals is remarkably improved, and high-precision atmospheric humidity and wind field detection is achieved.

The utility model discloses a pulse modulator comprising a housing, a circuit control board, a moving block, a semiconductor chilling plate and a driving mechanism, the housing is internally provided with the circuit control board, the circuit control board is provided with a circuit element and a first heat radiation fin, the moving block is provided with a first heat radiation fin, and the semiconductor chilling plate is provided with a second heat radiation fin. A heat conduction plate is arranged on the side, away from the circuit control board, of the first cooling fin, a moving block is arranged on the heat conduction plate in the length direction of the heat conduction plate in a reciprocating motion mode, a semiconductor chilling plate with the refrigeration face attached to the heat conduction plate is arranged in the moving block, and a power source used for powering on the semiconductor chilling plate is further arranged in the shell. Second heat dissipation fins are arranged on the heating face of the side, away from the heat conduction plate, of the semiconductor chilling plate, a fan with an outward air outlet is arranged on the side, close to the first heat dissipation fins, of the shell, and the driving mechanism is used for driving the movable block to move in a reciprocating mode.

The present invention proposes a multi-input pulse modulator circuit, which includes: an internal power supply circuit, which constitutes a linear voltage regulator circuit as a whole and provides voltage for chip operation; a signal selection circuit, which is electrically connected to the internal power supply circuit; a monostable circuit, which is electrically connected to the signal selection circuit and can adjust the output pulse width of the monostable trigger chip and the delayed output time when the signal is turned off; a pulse amplification circuit, which is electrically connected to the internal power supply circuit and the pulse amplification circuit is electrically connected to the signal selection circuit. In order to improve the amplitude and driving capability of the pulse output signal, the output signal with a fixed pulse width can be amplified, and functions such as the pulse voltage width following the input signal and the pulse voltage width being fixed can be realized.

An electronic device may include a receiver coupled to an antenna over a transmission line. The receiver may include a set of sample and hold circuits coupled in parallel between the transmission line and at least one pulse modulator. The pulse modulator(s) may be coupled between the sample and hold circuits and at least one time-to-digital converter (TDC). Each sample and hold circuit may be clocked using a different respective phase of a clock signal. During signal reception, the antenna may receive a radio-frequency signal. The sample and hold circuits may convert the radio-frequency signal into analog signals using the different phases of the clock signal. The pulse modulator(s) may convert voltages of the analog signals into pulse widths in at least one analog pulse width modulation (PWM) signal. The TDC(s) may convert the analog PWM signal(s) into digital codes.

The pulse steam type dish washing machine comprises a machine body and an adjusting mechanism, the adjusting mechanism is arranged in the machine body and comprises a connecting column, a sliding rail, a connecting shaft, a connecting pipe and a driving part, one end of the connecting column penetrates through the outer wall of the machine body and then is connected with the sliding rail, the connecting shaft is slidably connected with the sliding rail, and the connecting pipe is connected with the side wall of the connecting shaft; the driving part is arranged on the side wall of the machine body. According to the pulse steam type dish washing machine, the adjusting structure is arranged in the machine body, so that stains can be cleaned in all directions when the nozzle cleans tableware, cleaning dead angles are avoided, softened water is vaporized into supersaturated steam through the instantaneous vaporization module, and the cleaning efficiency is improved. And then the continuous steam flow is discretized into a series of pulses by an electromagnetic modulation valve, and the series of pulses are controlled by a pulse modulator to be sprayed out orderly, so that stains on the surface of the tableware are effectively impacted, and the penetrating power and the uniformity of cleaning are enhanced.

The invention relates to the technical field of electron accelerators, and particularly provides a modular electron accelerator pulse modulator device. The device comprises a cabinet, a system main controller, a central dynamic energy pool and a power module cluster composed of N power modules. The power modules are installed in a pluggable mode through the backboard slots and form a hybrid cascade Marx topology through the series busbars. The system main controller is integrated with a digital twinborn calculation module, coordinates the central dynamic energy pool to execute non-uniform energy distribution on each power module through a control bus, and controls each module to pre-shape an output pulse waveform. And each power module comprises a module energy storage unit, a module power switch unit and a module fine tuning unit formed by a GaN FET, and is used for realizing nanosecond precision correction of a pulse waveform. According to the invention, through modularized and intelligent control, the problems of pulse waveform distortion, low energy efficiency and insufficient reliability of a traditional device are effectively solved.

The present invention discloses a collective array type magnetically compatible infrared neural stimulation system, which belongs to the field of medical devices, including a signal generator, the output end of the signal generator is connected to the input end of a trigger, the output end of the trigger is connected to the input end of a microcontroller, the output end of the microcontroller is connected to the input end of an optical path switcher and the input end of a pulse modulator, the output end of the pulse modulator is connected to a laser, the laser emits a laser light source to the optical path switcher, and the optical path switcher emits the laser light source to a multi-channel magnetically compatible optical fiber array; the diameters of the stimulation ports with different spatial distributions in the multi-channel magnetically compatible optical fiber array are all no more than 1 cm, and are integrated with a number of optical fiber channels with a diameter of 220 microns. The present invention adopts the above-mentioned collective array type magnetically compatible infrared neural stimulation system, and can meet the distribution of functional columns in different brain regions of different experimental animals at the same time, so as to achieve efficient exploration of functional connections at the scale of functional columns of the whole brain and flexibly modulate specific functions.

The invention discloses a multi-treatment-head accelerator and a control method thereof. The multi-treatment-head accelerator comprises a rotating rack, at least two independent treatment heads and a beam control device, the treatment heads are installed on the rotating rack and distributed in the circumferential direction of the rotating rack, and each treatment head is provided with an electron gun, an accelerating tube, a pulse modulator, a magnetron and an electron gun power source; the beam control device comprises a main controller, a trigger control unit and a multi-path pulse generator, the main controller is connected with the trigger control unit through a real-time communication signal, and the trigger control unit is connected with the multi-path pulse generator. According to the invention, at least two independent treatment heads are arranged on the rotating rack, so that the treatment efficiency is obviously improved; and each treatment head is correspondingly provided with an independent image acquisition device, so that the image guide treatment process is further optimized.

A trigger circuit, a gate drive chip, an intelligent power module and a device, the trigger circuit comprises two edge trigger circuits, each edge trigger circuit comprises: a first pulse modulator, the input end of the first pulse modulator is used for receiving a first drive signal and carrying out time delay and noise filtering processing on the first drive signal, and the output end of the first pulse modulator is used for receiving a second drive signal; a second driving signal is obtained; the input end of the rising edge trigger is used for receiving a first driving signal, and a rising edge in the first driving signal triggers the rising edge trigger to enable the first output signal to be at a high level; the input end of the falling edge trigger is connected with the first pulse modulator, and a falling edge in the second driving signal triggers the falling edge trigger to enable the second output signal to be high level; and the logical operation circuit is electrically connected with the rising edge trigger and the falling edge trigger, and is used for operating the received first output signal and the second output signal to obtain a target driving signal and sending the target driving signal to the latch.

The utility model discloses a testing device for a pulse modulator and a radio frequency power amplifier, and relates to the field of radio frequency circuits, an input end of a negative voltage detection module is connected in series between a negative voltage output end of a direct current power supply and a grid voltage port of the radio frequency power amplifier, and the negative voltage detection module can detect the voltage condition output from the direct current power supply to the grid voltage port; the control end of the pulse modulation module is connected with the output end of the negative voltage detection module. Only when the voltage detected by the negative voltage detection module is greater than the preset value, i.e., the grid voltage port is confirmed to be powered on, pulse modulation is carried out to power on the drain voltage port of the radio frequency power amplifier. Through cooperation of the negative voltage detection module and the pulse modulation module, it is ensured that the grid voltage port is connected firstly and then the drain voltage port is connected in the power-on process of the radio frequency power amplifier, and therefore the safety and reliability of devices in the radio frequency power amplifier are improved.

The application belongs to the field of distributed optical fiber sensing detection, and discloses a distributed strain and temperature sensing device and method based on chaotic laser Rayleigh scattering. The device comprises a chaotic laser. Chaotic laser emitted by the chaotic laser enters a pulse modulator after an isolator, is modulated into pulsed laser, then enters a sensing optical fiber through a first optical circulator after a light amplifier and a polarization scrambler. Rayleigh scattering occurs along the sensing optical fiber, backward Rayleigh scattering light signals are output after returning to the first optical circulator, and are converted into electric signals by a photoelectric detector. The electric signals enter a data processing system after a data acquisition card. Quantitative measurement of strain is realized through linear relationship between cross-correlation frequency shift and strain or temperature. The application uses chaotic laser with low coherence state as detection light pulse, which can ensure wide measurement range under medium sensitivity.

The invention relates to an S-band compact high-power microwave transmitting system, which comprises an S-band high-power transmitting device and a feeder line system, the feeder system comprises a circulator, a bidirectional directional coupler connected with the output end of the circulator, and an S-band forward microwave monitoring system, an S-band reverse microwave monitoring system and an S-band radiation transmission system which are connected with the bidirectional directional coupler; the S-band high-power transmitting device comprises an excitation source, a klystron, a pulse modulator, a monitoring system, a water cooling system, a power supply system and an auxiliary power supply; the output end of the klystron is connected with the circulator; the auxiliary power supply comprises a filament power supply for supplying power to a filament of the klystron and a titanium pump power supply for supplying power to a titanium pump of the klystron. The device has the advantages of being high in practicability, good in integration and compactness and high in universality and stability.

The embodiment of the invention provides a microwave generating device and radiotherapy equipment. The microwave generating device comprises a microwave source used for generating microwave energy; the pulse modulator is used for providing pulse power for the microwave source; and an impedance matching circuit connected between the microwave source and the pulse modulator. Wherein the impedance matching circuit comprises an instantaneous matching unit, and the instantaneous matching unit is used for performing impedance matching at the moment when the pulse modulator applies the high-voltage pulse. The instantaneous matching unit comprises a resistor element and a capacitor element which are connected in series, the first end of the instantaneous matching unit is connected with the first output end of the pulse modulator and the anode of the microwave source, and the second end of the instantaneous matching unit is connected with the second output end of the pulse modulator and the cathode of the microwave source.

The invention relates to the technical field of pulse modulators, and discloses a circuit for improving the stability of a modulator system and a control method. The pulse width of a synchronous trigger signal of the synchronous switch is greater than that of a trigger signal of the solid-state modulator; in the charging stage of the solid-state modulator, the synchronous switch is switched on, the front-stage high-voltage power supply charges the solid-state modulator, and in the discharging stage of the solid-state modulator, the synchronous switch is switched off, so that the front-stage high-voltage power supply is isolated from the solid-state modulator; and the sampling circuit is used for sampling at the flat top part of the output pulse of the solid-state modulator, generating a feedback signal and sending the feedback signal to the preceding-stage high-voltage power supply so as to realize closed-loop control. According to the invention, the stability of a modulator system can be obviously improved, the power resistance requirement of a charging resistor of a high-power switching power supply is reduced, the inherent instability of the system at the moment of high-current pulse discharging can be effectively avoided, and the consistency and short-term stability of different pulses are improved.

The utility model discloses a mechanical valve opening measuring device, which belongs to the technical field of valves, and is characterized in that a connecting shaft on a valve main body transmits a rotation angle signal of a valve core to a rotary encoder, the rotary encoder converts the rotation angle signal into a pulse signal and transmits the pulse signal to a pulse modulator, and the pulse modulator is connected with the valve main body. The pulse modulator modulates the pulse signal, the modulated pulse signal is input into the signal processing module to be processed, then a valve opening signal is output, and the signal processing module transmits the valve opening signal to the display driving module. The opening degree of a traditional valve is digitalized and can be remotely monitored, and the situation that the valve is not opened and closed in place due to human factors is avoided.

Techniques are described for decoding a pulse-width modulation (PWM) signal transmitted across an isolation barrier, such as within a gate driver. The techniques utilize a PWM modulation scheme that uses four or more stages for encoding and decoding data to ensure accurate and efficient communication across the isolation barrier. Using these techniques, the pulse modulator generates a PWM signal with four or more different modulation stages, each representing different combinations of AC and DC components, enabling the encoding of two data bits per modulation cycle.

The invention discloses an anti-electromagnetic interference shielding structure of a pulse modulator cabinet, relates to the technical field of pulse modulator cabinets, and solves the problems that the pulse modulator cabinet in the prior art is poor in anti-electromagnetic interference shielding effect and the heat dissipation effect is reduced due to the fact that a dustproof net of a heat dissipation mechanism is not cleaned in time. Comprising a cabinet body, and a backboard of the cabinet body is provided with heat dissipation ports; the heat dissipation assembly is used for heat dissipation of equipment modules in the cabinet body, and the heat dissipation assembly comprises a heat dissipation pipe fixedly installed in the heat dissipation opening, a heat dissipation fan fixedly connected in the heat dissipation pipe, an electric valve fixedly connected to the side face of the heat dissipation pipe and a dustproof net fixedly connected to the outer side of a port of the electric valve; the device further comprises a shielding assembly. By means of the design, the shielding requirements of high frequency and low frequency can be met at the same time, and the interference problem is effectively avoided by installing the core modules in a partitioned mode. In addition, dust adhering to the dustproof net can be automatically cleaned before each time of use, the heat dissipation effect is ensured, and the problem that manual cleaning is not timely is effectively avoided.

A kind of quick weak light fiber grating array demodulation device and method based on reflection enhancement point belong to optical fiber sensing technical field, the present application is to solve the problem of wavelength grating reflection signal segmentation inaccuracy in prior art high-speed dynamic demodulation, make system demodulation error big.This application includes fast scanning laser, electric pulse signal generator, optical pulse modulator, fiber amplifier, fiber circulator, reflection enhancement point, weak grating array sensing unit, photoelectric conversion module, acquisition module, data analysis processing module and control module.Reflection enhancement point and weak grating array sensing unit are reflected to fast scanning optical pulse signal and obtain reflected signal, the reflected signal of reflection enhancement point is segmented to weak grating array reflected optical pulse signal of any wavelength, after data processing, grating position and center wavelength are obtained.The system uses reflection enhancement point to obtain the grating reflected signal of each wavelength, realizes the high-speed dynamic demodulation of weak grating array sensing unit.

The invention discloses a multi-channel pseudo-random code modulation laser interference source device. The device comprises a pseudo-random code modulator, an external modulation laser group, an optical fiber beam splitter group, an optical fiber buncher and a two-dimensional galvanometer which are arranged in sequence, according to the invention, laser modulation is carried out through the pseudo-random code pulse modulator, pseudo-random pulse codes are generated, and optical interference pulses with different coded signals are generated; two-dimensional galvanometer light beam deflection control is adopted, and control over laser interference signals in different directions can be achieved; a multi-path 1 * 2 optical fiber beam splitter and a multi-path 1 * 8 optical fiber beam splitter are adopted, beam splitting of coding signals of the same type is achieved, and the function of transmitting multi-channel interference light beams at the same time is established. According to the invention, emission of light interference signals of different codes is realized, a function of simulating laser radar light signals of unmanned vehicles produced by different manufacturers is realized, a function of simultaneously emitting multiple paths of light interference signals is realized, and a problem of simulating complex light interference environment signals in practical application of the unmanned vehicles is solved.

The invention particularly relates to a high-power dual-mode solid-state microwave amplifier which is characterized in that a control and pulse modulator is used for generating pulse signals with different widths, amplitudes and frequencies according to external control signals and outputting the pulse signals to a microwave power amplification link; and the microwave power amplification link is used for switching accessed links according to the external control signal and the pulse signal, and amplifying the input microwave small signal so as to output microwave signals with different duty ratios, peak powers and pulse widths. The device can be used for a phased array microwave weapon integrating detection, guidance and striking functions, and has the capability of outputting pulse waveforms meeting different functional requirements.

The invention discloses a top drop compensation method and circuit for a solid-state high-voltage pulse modulator and the modulator, and the method comprises the steps: superposing negative pressure at the front part of a discharge pulse when the pulse discharge of the solid-state high-voltage pulse modulator begins, thereby reducing the amplitude of the front part of the discharge pulse, and after the pulse discharge reaches a set time threshold, reducing the amplitude of the front part of the discharge pulse. Positive voltage is superposed at the rear part of the discharge pulse, so that the amplitude of the rear part of the discharge pulse is raised, and the top of the output high-voltage pulse is flat by setting a time threshold value and corresponding negative voltage and positive voltage values. By adjusting the voltage of the compensation capacitor and adjusting the delay time between the compensation switch and the discharge switch, compensation of pulse top drop can be completed quickly and conveniently, and the effect is good.

The invention provides a mechanical optical pulse modulator and a modulation method. The mechanical optical pulse modulator includes: a light source; a motor flywheel; the wedge-shaped mirror is arranged on the outer edge of the motor flywheel, and the wedge-shaped mirror is configured to reflect light emitted by the light source under the condition that the wedge-shaped mirror rotates to be located on the same straight line with the circle center of the motor flywheel and the light source and faces the light source; the micro reflecting mirror is located in the emergent direction of the reflected light of the wedge-shaped mirror and used for reflecting the light reflected by the wedge-shaped mirror, the micro reflecting mirror comprises a light reflecting part and a light absorbing part, and the light absorbing part is used for absorbing the light around the light reflecting part. According to the mechanical optical pulse modulator provided by the invention, the problems of high cost and complicated adjustment method of optical pulse modulation equipment in the prior art are solved.

The invention discloses an online training cerebellar neural network controller and a control method for a single-inductor multi-output switching power supply. The method comprises the following steps: performing difference operation on reference voltage and output voltage through a logical operation unit to obtain an output voltage error, an error integral quantity and an error differential quantity; each PID controller is configured to enable an input signal to correspond to each path of output voltage error, and is used for carrying out proportional-integral-differential adjustment on the PID controller based on each error integral quantity and error differential quantity; the cerebellar neural network is configured to update the weight of the cerebellar neural network in real time through online training based on a local learning rule and output a digital control signal carrying duty ratio adjustment information; the digital pulse modulator generates a complementary switching signal based on the duty ratio adjustment information and forms a switching signal to drive a power switching tube of the single-inductor multi-output switching power supply, the disturbance recovery time and overshoot of the digital power supply can be effectively reduced, and the transient performance is remarkably improved.

The present invention belongs to the technical field of impedance measurement, and particularly relates to an impedance measurement system based on noise orthogonal technology, comprising: a current source, a noise orthogonal pulse modulator, a chopper switch, an impedance to be measured, a synchronous clock unit, and a noise orthogonal analog-to-digital converter; the noise orthogonal pulse modulator outputs a signal to the chopper switch to modulate the chopper switch; the input of the chopper switch is connected to a pair of current sources, and the output is connected to the impedance to be measured; the impedance to be measured is connected to the input of the noise orthogonal analog-to-digital converter; the synchronous clock unit outputs a synchronous sampling clock signal, which is respectively connected to the noise orthogonal pulse modulator and the noise orthogonal analog-to-digital converter. The impedance measurement system based on noise orthogonal technology of the present invention does not require a sine wave generator, has the advantages of low power consumption, small area, and low cost. At the same time, the signal is completely decoupled from the quantization noise, and the resolution is higher.

High-efficiency dual-frequency homologous frequency-modulated radio broadcast modulation and transmission system, which relates to the field of radio and television technology and solves the problem of low power efficiency of existing multi-program homologous transmitters. The system includes a frequency modulator and a power amplifier circuit. The power amplifier circuit includes an amplitude modulator and a carrier amplifier. The frequency modulator includes a processor, a V oscillator, a U oscillator, a pulse generator, a pulse modulator, an inverter, a phase detector, and a data selector. The power amplification circuit of the present invention not only has the function of signal amplification, but also participates in the frequency synthesis of frequency-modulated programs in the form of high-power amplitude modulation, which is a new technical route. Therefore, the power amplifier circuit can use class C or higher class D amplifiers with higher power efficiency, and the output high-power program signal can be directly transmitted.

The utility model provides a picking arm device for an industrial robot. The picking arm device comprises a base; the rotary table mechanism is arranged on the base; the encoder mechanism is arranged on the base and is connected with the rotary table mechanism; the counter is connected with the encoder mechanism; the first rotary joint is arranged on the rotary table mechanism; the first arm section is connected with the first rotary joint; the second rotating joint is arranged at the end part of the first arm section; the second arm section is connected with the second rotary joint; the third rotary joint is arranged at the end part of the second arm section; the third arm section is connected with the third rotary joint; the grabbing mechanism is arranged at the end part of the third arm section; the pressure sensor is arranged on the grabbing mechanism; the pulse modulator is arranged on the base and is in signal connection with the pressure sensor; and the output end of the pulse modulator is connected with the counter. According to the goods picking arm device for the industrial robot, goods can be picked in a classified mode, the number of the picked goods can be accurately counted, and investment of labor cost is reduced.

The invention provides a time phase domain random modulation ultra-long distance Brillouin optical time domain reflectometer, and belongs to the technical field of time phase domain random modulation Brillouin optical time domain reflectometers. In order to solve the technical problem that the spatial resolution and the sensing distance of an existing Brillouin optical time domain reflectometer cannot be increased at the same time, the adopted technical scheme is as follows: the output end of a narrow linewidth laser is connected to the input end a of a first optical fiber coupler; the output end b of the first optical fiber coupler is connected to the input end d of the pulse modulator; the output end f of the pulse modulator is connected to the input end g of the phase modulator; the output end A of the arbitrary waveform generator is connected to the input end e of the pulse modulator, and the output end B of the arbitrary waveform generator is connected to the input end h of the phase modulator; the output end i of the phase modulator is connected to the input end of the pulsed light amplifier; the output end of the pulse optical amplifier is connected to the input end of the first optical filter; the method is applied to the Brillouin optical time domain reflectometer.

The present invention relates to a transmitter (1000) for a BB84 protocol, comprising a laser (1100) configured to generate a first light pulse (P1) having a first duration (Tp1), a modulator (1200) configured to modulate an intensity of the first light pulse (P1) so as to obtain a second light pulse (P2) having a second duration (TP2) smaller than the first duration (TP1) and / or a third light pulse (P3) having a third duration (TP3) smaller than the first duration (TP1). Further embodiments relate to methods for operating the transmitter (1000).