137results about How to "Implement Feedback Control" patented technology

The invention provides a device and a method for detecting a high sound pressure-phase shifting characteristic of a microphone. A variable-section closed space is formed by an equal-phase coupling cavity, a variable-section reflection end cover, a standing wave tube and a bottom reflection end cover; a loudspeaker in the standing wave tube is connected with a power amplifier; the power amplifier is connected with a signal source; the signal source is connected with a computer; a reference microphone and a calibrated microphone are respectively arranged on the side wall of the equal-phase coupling cavity and are connected with a signal amplifier; and the signal amplifier is connected with the computer. The method comprises the following steps of: controlling the signal source by the computer, and driving the loudspeaker in the standing wave tube to send a sound wave signal by the power amplifier; and performing cross-spectrum analysis on a signal which is acquired by the reference microphone and the calibrated microphone, so as to obtain a phase difference of the calibrated microphone relative to the reference sensor under a certain condition. A sound source has high sound pressure of 94 to 160 decibels according to a standing wave sound field theory, and the distortion degree is less than 1 percent; and therefore, the phase shifting characteristic of the phase sensitivity of the microphone is calibrated under a high sound pressure environment.

The invention discloses a scalable low-latency feedback control device for quantum bits. The device realizes the feedback control of the quantum states of multiple quantum bits by means of digital signal processing technology and a quantum mechanical principle based on a high-speed microwave baseband signal transceiving hardware circuit board. The quantum feedback control device designed in the present invention is different from the feedback control applied in the classic field, and can generate synchronous microwave pulses for operating superconducting quantum bits, can accurately define thenumber of times, the time and the strength of quantum measurement, demodulates measurement signals in real time, deploys a quantum feedback algorithm on an FPGA, and has extremely low feedback delayand excellent scalability so as to accurately control a system integrating multiple quantum bits and to satisfy a requirement for running a measurement-based quantum error correction algorithm on a quantum chip.

The invention discloses an optical switch system and a signal light feedback control method. The optical switch system comprises an input optical fiber, an output optical fiber and an optical output control module, wherein a reflecting film is coated on an end face of the output optical fiber; and the optical switch system also comprises a coupler, a photodetector, a judging module and a control module, wherein the coupler is connected with the input optical fiber; the reflecting film is used for reflecting the signal light which is output from the optical output control module to the output optical fiber and reflecting the reflected output signal light in the coupler along an original path; the coupler is used for splitting the output signal light and extracting the signal light in a first preset ratio from the output signal light and inputting the signal light into the photodetector; and the judging module is used for comparing light energy of the output signal light which is detected by the photodetector with light energy of the input signal light which is initially acquired. The invention also provides a signal light feedback control method. Compared with the prior art, the invention greatly reduces the cost.

The invention discloses a feedback control method of a semiconductor silicon chip etching process. Plasma spectral information of the plasma in an etching cavity is detected through the prior optical emission spectra OES on the etching cavity which is used for the end-control to the etching process when an end point of the etched silicon chip is detected. The detected spectrum information is processed, and according to the processing result, the adjustable quantity of the etching process parameter is determined, and the process parameter is adjusted, to realize the feedback control of the etching process to the semiconductor silicon chip. Additionally integrated online check-up equipment is saved, a complex feedback control is carried on, the control process is simple, the control is precise, and the cost is low.

The invention discloses an embedded high-definition video acquisition and data stream transmission system. Based on a Samsung S5P6818 core board, an OV5640 camera integrated board card is adopted to acquire high-definition image data, a multimedia hardware codec integrated in the core board is adopted to carry out compressed encoding on the image, an algorithm processing algorithm is used to extract image features, and a real-time video and a feature parameter data stream are published in a local area network through a streaming media server built on the board. Thus, a remote PC client can receive the video streaming data and the image feature parameter data, and through decoding, display and local storage, functions such as historical query are supported.

The invention discloses a pressure-distributed sensor, and an intelligent sickbed monitoring system and an intelligent sickbed monitoring method. In terms of a long-term bedridden patient, terminals such as a mobile phone, a tablet personal computer, and so on could help the patient to finish a series of movements of rising back, turning over, pumping legs, and to prompt the patient to turn over according to the data obtained by the pressure-distributed sensor so as to prevent the generation of chronic pressure sores, and use a camera to monitor the state of the patient. The system is composed of power-driven sickbeds, Arduino, an inertial sensor, the pressure-distributed sensor, a Raspberry Pi, the camera, a server and a Web end. The inertial sensor could obtain the posture angle of the sickbed and transmit the angle data to the Raspberry Pi to achieve the feedback control of a linear motor. The Raspberry Pi is used as data terminal of the single intelligent sickbed while the server is used as a data control terminal of a plurality of intelligent sickbeds and could be used for monitoring the sickbeds via the Web end and monitoring the physiological status of the patient and the states of the intelligent sickbeds.

The invention provides a device and method for detecting the friction force of a continuous casting crystallizer on line. The vibrating system of the detecting device comprises hydraulic cylinders (3) each of which is provided with a pressure sensor (4) and a displacement sensor (5), wherein the two hydraulic cylinders are arranged on the two sides below a vibrating table in a bilaterally symmetrical mode; and signals detected by the two sensors are sequentially processed by a programmable controller (8), an analogue/digital (A/D) data acquisition card (9), an industrial personal computer (IPC) (10) and a communication card (11), and are transmitted to a server (12) for data storage. The detecting method comprises the following steps of: measuring the comprehensive rigidity and the equivalent damping of the vibrating system through particle swarm optimization (PSO), performing force analysis on the vibrating system, establishing force equations when the vibrating system keeps still at a vibrating balance position and in a null vibrating state and a throwing state, and calculating the difference between throwing output force and null vibrating output force so as to acquire the friction force of the crystallizer. By using the device and the method, the friction force of the continuous casting crystallizer can be accurately and reliably detected in real time on line.

The invention discloses a laser deep penetration welding intelligent monitoring system and method based on plasma electric signals. The system comprises three portions, namely, a laser welding subsystem, a motion control subsystem and an electric signal acquisition subsystem, so that the quality judgment of weld joints is realized. The method comprises the following steps that the electric signalsof the laser plasma are measured on line, and the electric signal voltage data are acquired in real time; the denoised signals undergo ensemble empirical mode decomposition; sample data of each weldjoint is selected; the node number of an input layer, a hidden layer, a sum layer and an output layer of the probability neural network to be established is determined; by taking the training sample data as input of the probability neural network, a probability neural network model is established, probability neural network training is performed, the judgment result of the probability neural network is compared with the actual weld joint state, and the probability neural network model is verified; and the prediction accuracy of the probability neural network model is verified. According to thelaser deep penetration welding intelligent monitoring system and method, the welding state can be identified in a high-precision mode, the feedback control of the welding quality can be realized, andthe operation cost is greatly reduced.

The invention discloses an optical fiber coupling-based CARS (Coherent Anti-Stokes Raman Scattering) beam space stability test control device and method. the system is composed of three parts of a CARS micro excitation source (100), a beam space stability detection device (200) and a beam feedback control system (300), wherein space beams outputted by the CARS micro excitation source (100) pass through the beam space stability detection device (200) to monitor the space state in real time, the space beams are adjusted through the beam feedback control system (300), and finally, the CARS microexcitation source 100 outputs beam space stability test and control. In comparison with the prior art, the space state of a pump beam remains stable when an adjustable space light delay line changes,the problem that a space light path needs to be adjusted frequently in a CARS micro imaging system to ensure space overlapping between the pump light and the Stokes light can be avoided, the operationprocess is simplified, and the detection efficiency is improved.

A lighting apparatus includes a lighting module, a feedback control circuit, and a DC-to-AC circuit. The lighting module comprises a first lighting unit, a second lighting unit, a first transformer, a second transformer and a third transformer. A first end of a first port of the first transformer is connected to a first end of the first lighting unit, a first end of a first port of the second transformer is connected to a second end of the first lighting unit, a second end of the first port of the second transformer is connected to a first end of the second lighting unit, and a first end of a first port of the third transformer is connected to a second end of the second lighting unit. The lighting apparatus uses serial connection of the lighting units to reduce the number of transformers and still have the feedback control circuit.

The invention provides a system and method for analyzing and controlling coupled dynamic characteristics of a robot. The analysis and control system comprises a computer, wherein a modeling module B1 and an analysis module B2 are arranged in a computer C; and a signal analysis system B5, a detection module B4 and a control module B3 are arranged between the computer C and the robot. According to the method, coupling factors existing in the robot system can be considered, the analysis result precision of the dynamic characteristics is high, and the problems of errors, even mistakes, caused by neglecting of the coupling factors can be effectively solved. Meanwhile, feedback control of the coupled dynamic characteristics of the system can be realized, and comprehensive analysis and integrated design of the robot system can be facilitated. The system disclosed by the invention is based on system modularization and is easy to realize and simple in operation, the complicated theoretical modeling calculation process is avoided, the analysis difficulty is reduced, and the problem that errors are easily caused due to lots of calculations and solutions can be effectively solved.

The invention discloses a soft mechanical arm based on SMA springs. The soft mechanical arm comprises a platform. Multiple mechanical arm fingers are arranged below the platform. Each mechanical arm finger comprises a silica gel outer shell. Each silica gel outer shell is internally provided with a soft sensor and the corresponding two SMA springs. Every two SMA springs are arranged in the corresponding silica gel outer shell at the set angle from top to bottom. The top end of each SMA spring is provided with a lead wire. The SMA springs are connected with a control circuits through the lead wires. The extending-and-contracting state of the SMA springs is controlled through the control circuit, and thus, work of the mechanical arm fingers is achieved. The control circuit comprises a singlechip microcomputer, a PWM electronic switch control panel and a voltage-controlled current source, wherein the single chip microcomputer is provided with multiple analog input ports. The STM32 singlechip microcomputer is used for achieving a PWM control constant flow source circuit and outputting the specific frequency and PWM waveforms of specific duty ratios. The PWM electronic switch controlpanel is used for converting PWM signals into the voltage. The voltage-controlled current source controls the current to change through voltage changes. By means of the soft mechanical arm, gripping control of the soft mechanical arm can be achieved.

The embodiment of the invention discloses a hyperbaric oxygen chamber equipment operation monitoring method and system. The method comprises the steps that a hyperbaric oxygen chamber environmental oxygen index and a physical information index of a user are obtained, the control relationship is established between the environmental oxygen index and the physical information index, and when at leastone of the conditions that temperature detection data deviates from a body temperature early warning threshold value, pulse detection data deviates from a pulse early warning threshold value, blood pressure measurement data deviates from a blood pressure early warning threshold value, blood oxygen saturation data deviates from a blood oxygen early warning threshold value, and electrocardio data deviates from an electrocardio early warning threshold value is met, the environmental oxygen concentration, environmental oxygen pressure, environmental oxygen flow and environmental temperature are adjusted according to a concentration regulation step value, a pressure regulation step value, a flow regulation step value and a temperature regulation step value; deviations include greater or less than the early warning threshold value. Accordingly, by judging the oxygen pressure, concentration and flow in the hyperbaric oxygen chamber environment, equipment operation parameter real-time monitoring and feedback control is achieved, occurrence of dangerous accidents is avoided, the equipment operation is more efficient, and energy consumption is lowered.

The invention discloses an on-line wavelength calibration device and a method of a DBR (distributed bragg reflector) tunable laser. The device comprises a coupler, an interferometer, a photoelectric detector, a signal acquisition and processing circuit and a laser driving circuit. A reflection spectrum of the interferometer is of a cosine type; output wavelengths of the DBR tunable laser are set at a pi/2 phase of the reflection spectrum of the interferometer; when an optical signal acquired by the signal acquisition and processing circuit deviates from the pi/2 phase, a newly generated control parameter of the DBR tunable laser is transmitted to the laser driving circuit; and the laser driving circuit changes control current of the DBR tunable laser, so that the output wavelengths of theDBR tunable laser are locked at the pi/2 phase of the reflection spectrum of the interferometer all the time. According to the device and the method, the interferometer is introduced for monitoring and feedback control of the wavelengths of the DBR tunable laser, and a wavelength control error during long-term usage of the DBR tunable laser can be effectively decreased.

The invention discloses a fiber state detection method and system, and relates to the technical field of fiber detection. The method comprises: performing calculating on a standard fiber output light field image to obtain a standard value aperture histogram of a fiber output light field; through analyzing an acquired image of a fiber output light field to be detected, obtaining a value aperture histogram of the fiber output light field to be detected; and comparing the value aperture histogram of the fiber output light field to be detected with the standard value aperture histogram of the fiber output light field to obtain a state change of the fiber output light field to be detected. According to the invention, for the structural characteristics and optical waveguide characteristics of a multi-wrapping-layer fiber, the method is designed to realize detection of the state of the multi-wrapping-layer fiber. The method is applied to detection of fiber defects, bending states, loss parameters and the like, and can also realize real-time monitoring and feedback control of the multi-wrapping-layer fiber at the same time.

A micro-gyroscope of permanent magnet rotor stably suspended by high temperature superconductor is prepared by setting gyroscope bottom shell on piqued nitrogen Dewar through support column; forming top and bottom stators of gyroscope by high temperature superconductor, silicon nitride insulation material and stator driving detection moment layer; forming gyroscope rotor by two layers of rotor driving detection moment layer, two layers of cylindrical silicon nitride insulation material and cylindrical permanent magnet material .

The invention belongs to the field of mechanical automation and astronomy, and concretely discloses a six-degree-of-freedom platform positioning control method and equipment. The method includes the establishment of a simulation model and the control of a six-degree-of-freedom platform, by establishing and configuring the six-degree-of-freedom platform simulation model and parameters thereof, a six-degree-of-freedom platform PID control algorithm module based on forward kinematics solution is established in simulink, by combining a mechanical system dynamics automatic analysis model, the jointmotion simulation control is realized, and then the precise positioning control of the six-degree-of-freedom platform is realized. The method and the equipment based on the method realize the controladjustment of the six-degree-of-freedom platform based on the workspace control strategy, can realize the closed-loop feedback control of the platform positioning by using the forward kinematics based on the discrete Newton iterative solution, simplify the control algorithm and improve the positioning accuracy of the platform.

The invention relates to a high-flow-rate low-temperature gas temperature-humidity control device. The high-flow-rate low-temperature gas temperature-humidity control device comprises a gas source, adecompression apparatus, a liquid thermostat, a first dehumidifying apparatus and a second dehumidifying apparatus, wherein the gas source is used for providing high-pressure gas; an input end of thedecompression apparatus is connected with the gas source and used for adjusting the gas pressure and the flow rate of the high-pressure gas; a first heat exchanger and a second heat exchanger are arranged inside the liquid thermostat; the first dehumidifying apparatus comprises a first dewatering assembly and a first pipeline heater; and the second dehumidifying apparatus comprises a second dewatering assembly and a second pipeline heater. Compared with the prior art, two heat exchangers are provided, the corresponding dewatering assembly and pipeline heater are arranged behind each heat exchanger, and the pipeline heater is arranged behind the dewatering apparatus, so that the water content in the gas can be greatly reduced, the possible icing amount is reduced, and a fuel cell is prevented from being damaged.

The invention relates to an adaptive mobile optical charging system based on feedback signaling. The adaptive mobile optical charging system comprises a transmitting terminal and a receiving terminalwhich are separated, and is characterized in that the transmitting terminal comprises a feedback controller, a power supply and an optical charge transmitter which are sequentially connected, the receiving terminal comprises an optical charge receiver, an electric energy converter and a feedback monitor which are sequentially connected, and the electric energy converter is connected with a charging target; and the optical charge transmitter transmits optical beam transmission power energy to the optical charge receiver, and the feedback monitor is used for feeding back required information tothe feedback controller. Compared with the prior art, the adaptive mobile optical charging system achieves mobile optical charging within a scope of 0-50m; and the adaptive mobile optical charging system further achieves an information feedback mechanism between the transmitting terminal and the receiving terminal, and the transmitting terminal can respond according to the feedback information ofthe receiving terminal.

The invention discloses an intelligent man-machine interaction type vehicle accelerator pedal device. The device comprises a pedal rotary shaft system, a control shaft system, a sliding polished shaft system and a clutch shaft system. The pedal rotary shaft system, the control shaft system, the sliding polished shaft system and the clutch shaft system are arranged on a pedal support. The pedal rotary shaft system is used for achieving work states of a common accelerator pedal, the control shaft system transmits power to the clutch shaft system through the sliding polished shaft system, a cylindrical cam, idler wheels and a transmission rod in the clutch shaft system drive a pressing plate to move axially so that the plate-type cam of the control shaft system can achieve feedback control of pedal force after the pressing plate and a friction plate are combined and locked, and an adjusting mechanism in the sliding polished shaft system can adjust the axial position of a sliding gear so that the common accelerator pedal can work when a control motor fails. Besides, control of rotation speed and power of an engine and running speed can be achieved through the common accelerator pedal, running states and road condition information can be fed back to drivers through an accelerator pedal in a tactile feedback mode, man-machine interaction is achieved, and the drivers are assisted in improving driving behaviors.

The invention discloses a tramcar based on rubber wheel and virtual track technology. The tramcar based on the rubber wheel and virtual track technology comprises a car body (1), a control system (6) and a wheel assembly, and is characterized in that the wheel assembly is a rubber wheel with a drive motor and a brake device, and both the drive motor and the brake device are respectively connected with the control system (6); the bottom of the car body (1) is also provided with a sensor (4) for detecting a ground virtual track mark (3), and the output end of the sensor (4) is connected with the control system (6); or the car body (1) is provided with a satellite locator which is connected with the control system (6). The tramcar does not need a steel rail and is low in running noise and small in influence on the urban environment; the smoothness of a pavement and completeness and attractiveness of a street, in which the tramcar runs, can be guaranteed, and the running of other traffic tools and the passing of the pedestrians also can be conveniently realized.