10results about How to "Amplitude stable" patented technology

The invention provides an all-electric measurement and control instrumented tensile impact fatigue experiment system, and mainly solves the problems that stress wave pulses are transmitted back and forth in a rod, and a cyclic loading test and an automatic test cannot be repeated. According to the invention, the Hopkinson pull rod system, the stress wave riveting gun module, the lead screw dragging device and the comprehensive detection and control device are utilized to realize single-time repeated impact loading of a test piece, control the launching and recovery of a projectile body, realize closed-loop control of loading force, and improve the reliability of the test piece. According to the invention, a single loading impact fatigue function of continuous tensile impact on a sample is realized through the energy absorption and limiting device and the screw rod dragging device, and instrumentation and full automation of an impact tensile fatigue experiment are realized.

The invention provides a coating motion control method and device, and relates to the technical field of coating control, and the coating motion control method comprises the steps that the real-time position of a swing roller at the current moment is obtained; determining a first control parameter based on the real-time position and a configured first preset position; based on the first control parameter, the movement speed of the first mechanism is controlled at the next moment; a second control parameter is generated based on the real-time position of the swing roller after the swing roller moves to the first preset position; and controlling the movement speed of the second mechanism based on the second control parameter. The moving speed of the lower layer passing roller of the belt storage mechanism is controlled based on the real-time position and the stable state position of the swing roller, so that the length of the coiled material conveyed in the belt storage mechanism is changed, the tension of the coiled material is changed, the coating control stability is improved, meanwhile, the coating efficiency is improved, and material waste in the coating process is reduced.

According to the FDDS application of the FPGA in the magnetic suspension controller, the FPGA and the DSP adopt an SPI communication mode, the DSP controls the FPGA to output digital signals with corresponding amplitudes, frequencies and phases, differential subtraction is carried out on the output signals passing through a bridge circuit to obtain a position relative difference value, whether a magnetic suspension bearing deviates in the direction or not and whether the magnetic suspension bearing deviates in the position or not are judged on the basis of a set warning value, and then the magnetic suspension bearing is subjected to FDDS detection. An alarm is sent to the DSP; and meanwhile, an output signal passing through the bridge circuit is detected and amplified and then is transmitted to an AD (Analog to Digital) of a DSP (Digital Signal Processor) for sampling so as to obtain the position information of the magnetic suspension bearing, and then the DSP performs certain protection or compensation measures on the real-time position information based on the alarm information so as to finish closed-loop adjustment. According to the invention, a zero-setting filter, a digital detector, a digital comparator and the like are realized by using internal resources of the FPGA, the advantages of low cost, low power consumption, high resolution, fast time conversion and the like are realized, and the method has very strong practicability and wide applicability.

The present invention relates to a vibration device and method for a vibrating sample magnetometer, in which a linear voice coil motor is arranged in cooperation with a grating ruler; the signal output end of the grating ruler is connected to a microcontroller; the input end of a displacement signal source is electrically connected to the microcontroller; the input end of an AC signal source is electrically connected to the microcontroller; the output end of the AC signal source and the output end of the displacement signal source are both electrically connected to the input end of a differential amplifier; the input end of a DC signal source is electrically connected to the microcontroller, the output end of the DC signal source and the output end of the differential amplifier are both electrically connected to the input end of an adder, and the output end of the adder is electrically connected to the linear voice coil motor through a current source. The present invention uses a linear voice coil motor as a vibration source, and uses a closed-loop control combining digital and analog, so that the vibration frequency and amplitude are stable, and at the same time has small mass, large load capacity, simple and reliable control circuit, and technical indicators reach the level of foreign commercial instruments, which can replace imports.

The application provides a charge pump circuit, wherein the circuit comprises a voltage output, four charge pump conversion modules, a square wave signal output module, a clock signal output module, a feedback control module and an output module; the four charge pump conversion modules are electrically connected in sequence; the first, second and third control terminals of any charge pump conversion module are electrically connected with the square wave signal output module and the clock signal output module; the first input terminal is electrically connected with the voltage output module or other charge pump conversion modules; the second output terminal is electrically connected with the feedback control module or grounded, or sequentially electrically connected with other charge pump conversion modules; the third input terminal is electrically connected with the feedback control module or other charge pump conversion modules; and the output module serves as the output terminal of the charge pump circuit. The charge pump circuit provided by the application can realize high-resolution voltage output and provide flexible programmable output voltage combination.

This utility model discloses a vibration device for a calcium sulfate whisker vibrating screen, including a vibrator. A vibrating screen is installed inside the vibrator, and a vibration device is installed on the side wall of the vibrating screen. When using this vibration device for the calcium sulfate whisker vibrating screen, the adjustable tilt angle vibration design significantly improves the screening accuracy and efficiency of calcium sulfate whiskers. Multiple sets of positioning holes on the side wall of the vibrating screen are linked to telescopic rods. The tilt angle of the screen is dynamically adjusted by a turntable driving the telescopic rods, allowing the whiskers to be fully dispersed by vibration at a specific tilt angle, preventing particle accumulation or screen blockage. Simultaneously, the telescopic vibrating rods and vibration springs work together to provide a stable amplitude.

The invention relates to the technical field of stratum identification, in particular to an intelligent identification system for a fractured layer of a coal measure stratum.The intelligent identification system comprises a sampling module, a detection module, a calibration module and an analysis module, a drilled stratum rock core is detected, the stratum rock core is divided into a plurality of samples, and vibration wave signals of all the samples are obtained; the vibration wave signals are analyzed so as to determine the crack condition of each part of the stratum rock core, whether the fractured layer exists in the stratum by each sample is comprehensively analyzed, and the fractured layer identification efficiency of the coal measure stratum is effectively improved.

This invention discloses a dual-channel time-sharing coordinated ultrasonic surgical control system and method, belonging to the field of ultrasonic surgical equipment. It includes a main unit control module, a peak power amplification unit, a dual-channel switching unit, a first handle interface, a second handle interface, an ultrasonic surgical handle (first and second), a foot pedal priority control module, and a parameter storage unit. The peak power amplification unit is a single-channel high-power amplification circuit with a peak output power of not less than 200W. The dual-channel time-sharing coordinated ultrasonic surgical control system and method of this invention uses a single-channel peak power amplification unit to power both handles, requiring only one set of power amplification and matching circuits. This significantly reduces the number of hardware components, lowers equipment production costs, assembly difficulty, and overall size. Simultaneously, it completely bypasses the core patent layout of foreign companies with dual-channel independent power output, resolving the patent infringement risk for domestic manufacturers.

The invention belongs to the technical field of wind power plant noise, and particularly relates to an alpha stable distribution estimation method for underwater noise distance characteristics of a wind power plant. The method comprises the following steps: firstly, preprocessing wind power plant noise to obtain wind power plant noise time domain oscillogram under different distances; thirdly, determining value ranges of stable distribution a and gamma according to parameter characteristics of alpha stable distribution, and selecting a value range of omega0 in combination with a range of simulation data; in order to solve the problem that gamma parameter estimation errors are large, a new estimation method based on semi-probability scale parameters is combined, and time domain waveform data of wind power plant noise at different distances are estimated through a new parameter estimation formula. According to the alpha stable distribution estimation method for the distance characteristics of the underwater noise of the wind power plant, the characteristics of the underwater noise of the wind power plant changing along with the distance can be described more accurately, and an effective means is provided for evaluation and management of the underwater noise of the wind power plant.

The application discloses a metal pipe water pressure vibration testing machine and relates to the technical field of pipe performance testing. The machine comprises a rack, a water receiving tray, a control box, a vibration device, a clamping device and a folding splash-proof cover. The water receiving tray is fixedly arranged on the rack and is used for collecting leaked water during the test. The control box is fixedly arranged on one side of the rack and is internally provided with a PLC controller. The vibration device is arranged in the control box and is fixedly connected with the rack through a mounting bracket. The clamping device is arranged on the water receiving tray and is used for fixing two ends of a metal pipe to be tested. The folding splash-proof cover is arranged on the top of the rack, can be opened and closed and covers above the clamping device, and is used for preventing water splashing during the test. The metal pipe water pressure vibration testing machine adopts the above structure, a stepping motor drives a zero-adjusting screw to rotate, 1:2 proportional opposite or reverse movements are generated between an adjusting flange nut and an adjusting nut, the eccentricity of a cross slide and a driven wheel is accurately changed, and automatic adjustment of the amplitude is realized.