33results about How to "Output response is fast" patented technology

The invention discloses a CT image detection method based on deep learning. The method comprises the steps of preprocessing an original image to obtain a to-be-detected image; establishing a trainingneural network detection model to obtain a neural network CT image detection model; inputting the to-be-detected image into the neural network CT image detection model; Obtaining detection results, wherein the input to-be-detected image comprises cross section direction information. Different from an existing single-input and single-output model training mode, input is changed into five-dimensional data from a one-dimensional data image of a single slice, output is also changed into two-channel mask output from single output, model precision and focus fitting degree of a prediction result areimproved, precision reaches expert level, and clinical application can be carried out. Moreover, in the process, a neural network CT image detection model is established by using big data in advance,during judgment, a CT scanning image of a patient is directly input, the model is used for calculation, the model output response speed is high, and disease delay is not likely to be caused.

The invention discloses a magnetorheological fluid damper. A piston is provided with a damping channel connecting two working cavities. The structure of the damping channel is as follows: a sliding groove and a slider in sliding fit with the sliding groove are arranged on the piston, the slider can move in the radial direction of the piston in the sliding groove, the slider faces the end surface of the inner wall of a working cylinder, a clearance is arranged between the slider and the inner wall of the working cylinder, and the two working cavities communicate with each other through the clearance. Due to the adoption of the technical scheme, the damping channel is controlled through the slider on the piston of the damper; not only can damping output be changed through the magnetic field variation of magnetorheological fluid, damping output can also be changed through the variation of the damping channel; and damping requirements under violet impact can be well solved. Compared with the prior art, the magnetorheological fluid damper has the advantages of being wide in damping output range, rapid in output response, simple in structure, reliable in performance, low in production cost and the like.

The invention discloses an ECPT system output voltage stability control method based on NSGA-II parameter optimization. A PID controller is adopted for conducting output voltage stability control on an ECPT system, a broad sense state space average model of the ECPT system is established, and based on the model, the method through which the NSGA-II multi-objective and multi-constraint genetic algorithm is utilized for conducting automatic optimization on control parameters of the PID controller is put forward. According to the optimization method, a group of optimal PID control parameters are searched out automatically under the multi-objective and multi-constraint condition, it is guaranteed that under the action of the PID controller and when the ECPT system load and transmission distance are varied within a certain range, the output voltage of a closed-loop system can still maintain the effect that the uprising time is short, the steady state error is small, and the Robust performance is good, thereby the Robust performance and transmission performance of the ECPT system are improved.

The present invention discloses a steam generator feed-water temperature control simulation system. A main feed-water pipe, arranged between a main feed pump and the secondary side inlet of a steam generator, passes through a heat regenerator, the secondary side outlet of the steam generator is connected with two parallel branch pipelines, one of the two parallel branch pipelines passes through the steam flow control valve of a main steam pipeline and is connected to a condenser, and the other one of the parallel branch pipelines passes through a steam by-pass stop valve, a steam by-pass flow control valve and the heat regenerator in order and then is connected with the condenser. According to the invention, high-temperature steam generated by the steam generator is employed as a heating source to perform preheating of feed water entering the steam generator to eliminate energy consumption caused by preheating depending on an extra power supply and improve the energy utilization rate of a test device, and high-temperature steam preheating output by the steam generator itself is employed to realize feeding water temperature control in a large flow variation range. The mode of combination of steam by-pass adjustment and feed-water by-pass adjustment is employed to rapidly, effectively and accurately realize adjustment of the feed-water temperature of the steam generator.

The invention discloses an ultrasonic sensor based method and system for recognition and positioning of a fillet weld initial point, and applies to recognition and positioning of a welding initial point of a long right-angle weld by means of a special automatic welding machine. According to the system, the ultrasonic sensor is adopted for positioning sampling, and a start point positioning controller is adopted for performing signal processing and data sampling on output signals; when horizontal recognition and positioning are performed, the sampled data are subjected to low value removal processing, an initial position is recognized with a maximum likelihood recognition algorithm, and a servo motor is driven to perform horizontal positioning through operation processing of positioning information; when longitudinal recognition and positioning are performed, a longitudinal distance of the ultrasonic sensor and the end part of a welding wire in a plane where a welding gun is located is set to be a longitudinal distance of the initial point; closed-loop regulation is performed by adopting a self-adaptive control method combining fuzzy control and PID (proportion integration differentiation) control according to output signals and output features of the ultrasonic sensor as well as multiple feedback signals of a distance measurement module, the speed of a speed regulator for regulating the servo motor is controlled, and the longitudinal positioning of the initial point is completed.

The invention relates to an engine oil cutoff detection switch and temperature detection integrated device. The engine oil cutoff detection switch and temperature detection integrated device comprisesa sensor base and a sensor mounting column. An upper probe and a lower probe are rotatably mounted on the sensor mounting column correspondingly. Connecting wires of the upper and lower probes are connected with an external control circuit. Two PCBs are mounted in the upper probe. A thermistor R2 and a heating resistor R3are mounted on one PCB. A thermistor R1 is mounted on the other PCB. A pt100is mounted in the lower probe. On the external control circuit, an electrical bridge is connected with the input end of a differential amplifier through a 15v power module. The output end of the differential amplifier is connected with a relay through an analog-digital conversion module and a signal amplifier. The relay is used for controlling the working state of a single-pole double-throw switch on the external control circuit. The engine oil cutoff detection switch and temperature detection integrated device has the advantages of being rapid in output response, small in output fluctuation,accurate in action and high in reliability and brings great convenience to a user during installation and application.

The invention discloses a multi-direct-current motor parallel fault-tolerant system and a fault-tolerant control method. The speed obtained by a position sensor under the action of a rotating speed calculation unit is fed back to a speed regulation module, and the current value obtained by a current detection sensor through a current calculation unit under the action of a motor fault detection signal is fed back to a current regulation module; a speed error obtained from a reference speed signal and a feedback speed signal under the action of a speed comparator is processed through a PI controller to obtain a current; a reference current is obtained under the action of a motor fault detection signal; a current value of the motor current signal is obtained under the action of the motor fault detection signal; a current error is obtained from the reference current and the current under the action of a current comparator, and a duty ratio is obtained through a hysteresis control comparator; and a PWM pulse generation unit obtains an on-off pulse control signal for controlling a switching tube in an (n+1) phase inverter. The method is advantaged in that efficient and stable operation of the motor is ensured, and industrial production efficiency is improved.

The invention provides a kind of pulse generation circuit which could produce the pulse with high speed and fixed pulse-width and could produce the pulse of the activating basic pulse PG which is suitable for the reading and writing motion from the internal of the synchronized integrated circuit, in particular the semiconductor memory circuit. Said pulse PG makes the transistor pM1 conduct by way of catering the high fringe of the first cycle in the timer clock CLK to produce start fringe, and makes the transistor nM1 conduct by way of catering the high fringe of the second cycle in the timer clock CLK to produce the end fringe of PG. Thus, the time period until producing the pulse is high speed. Since the pulse width is determined by the period, it is not changed completely.

The invention discloses a high-precision battery model. The battery model comprises a micro control unit (MCU), a power supply unit, a temperature simulation unit, a battery model unit and an RS485 communication unit; the power supply unit internally adopts a low-dropout linear voltage regulator LDO for stabilized voltage output; a battery simulation unit internally adopts a high-precision ADC anda DAC for output sampling and control and can simulate a short circuit, an open circuit, reverse connection and other faults; the temperature simulation unit controls the output of simulation temperature and voltage through the micro control unit (MCU) to simulate the real battery temperature; the RS485 communication unit is connected to a 485 communication interface in the micro control unit (MCU) to control the battery simulation unit. Compared with a battery simulator in the market, the high-precision battery model has the advantages that the output precision and the response speed are higher, isolated output is adopted, and multilevel series connection can be conducted for simulating the battery model.

The invention belongs to the technical field of batteries, and particularly relates to a multi-power-supply system containing a super capacitor and a control method thereof. The system comprises a super capacitor, a DC/DC converter, a battery and a system control unit, the system control unit comprises an acquisition module, a charging and discharging module, a microprocessor module and an equalization module. According to the multi-power-supply system containing the super capacitor, the parameters of the super capacitor are determined through energy, cost and volume, a multi-power-supply working mode is selected according to the state of charge, input or output of energy and power of the super capacitor and the battery is reasonably distributed, impact damage of a large current to the battery is effectively relieved, the service life of the battery is prolonged, output response is improved, system efficiency is improved, and battery equalization management is achieved.

The invention relates to a step level output circuit, comprising a reference source circuit, an intermediate level drive circuit, a control circuit, a first P type transistor, a first N type transistor and a second N type transistor. The intermediate level drive circuit comprises a current source, a second P type transistor, a third N type transistor and a capacitor. A threshold voltage Vthp of the second P type transistor, the threshold voltage Vthn of the second N type transistor, an intermediate voltage V1 output by an output end of the step level output circuit and a reference voltage VF output by the reference source circuit have the following relationship: VF=V1+Vthn-Vthp. Through adoption of the circuit of the structure, the output response is fast, the circuit is applicable to bandwidth application of a wide range, the structure is concise, a maintenance current is low, only three drive tubes are required, an area of a chip is reduced, a cost performance ratio is improved, and moreover, the fast response feature is kept, and the application range is wide.