13results about How to "Small adjustment" patented technology

The invention relates to the technical field of motor control and parameter identification, and discloses a permanent magnet synchronous motor parameter identification method based on a self-adaptive forgetting factor, which comprises the following steps of: acquiring an input signal and an output signal of a permanent magnet synchronous motor in real time, and constructing a regression vector by using the acquired input signal and output signal; calculating the information entropy of the current moment according to the constructed regression vector; performing normalization processing on the information entropy, and calculating a forgetting factor at the current moment according to the normalized information entropy; and substituting the forgetting factor into a parameter updating formula of a recursive least square method for parameter identification. According to the method disclosed by the invention, the adaptive capacity to dynamic change of motor parameters can be improved, the interference of noise on identification precision is effectively suppressed, the credibility of an identification result is improved, and the robustness and long-term stability of a control system are ensured.

The invention discloses a watermark embedding method and device, a watermark recognition method and device, electronic equipment and a storage medium. The embodiment of the invention relates to the technical fields of artificial intelligence, cloud technology and the like. The watermark embedding method comprises the following steps: acquiring a frequency domain coefficient sequence of a target image block in a to-be-processed image under a single-color channel; selecting a target frequency domain coefficient sequence from the frequency domain coefficient sequences; determining a reference image block under the single-color channel according to the target frequency domain coefficient sequence and sub-watermark information corresponding to a target image block in the watermark information; and obtaining a watermark image according to the target image block and the reference image block corresponding to the target image block under the single-color channel. In the application, the target frequency domain coefficient sequence in the preset position range in the to-be-processed image is adjusted to obtain the watermark image, the adjustment amount and the adjustment amplitude of the frequency domain coefficient of the to-be-processed image are relatively low, the influence of watermark information on the to-be-processed image is reduced, and the image quality of the obtained watermark image is improved.

The utility model relates to the technical field of arc generators, in particular to a fine-adjustable arc generator. In order to solve the problem that observation is affected by electric arc fracture due to the fact that a transmission seat is driven to move too fast when an adjusting knob is rotated, the following technical scheme is provided: the device comprises a base, two groups of vertical plates are symmetrically arranged at the top of the base, and three groups of observation plates are fixedly mounted on the vertical plates through screws; the generating mechanism is arranged on the base and used for generating electric arcs, and the generating mechanism comprises a copper rod and a carbon rod; and the adjusting assembly is used for adjusting the distance between the copper rod and the carbon rod. According to the utility model, the adjustment amplitude can be reduced, and precise adjustment is realized, so that arc breakage caused by too fast movement is prevented, normal generation of the arc is ensured, and analysis is further facilitated.

The application discloses a three-dimensional video fusion calibration and real-time rendering method and device, and the method comprises the following steps: acquiring a video frame image, performing distortion correction, and saving the distortion parameters after the distortion correction; selecting a plurality of feature points in the video frame image and the picture position of a corresponding three-dimensional scene of the video frame image, respectively, and performing registration on the video frame image and the picture position of the three-dimensional scene; acquiring initial internal parameters of a camera for shooting the video, and obtaining optimal internal parameters through an optimization solving mode; determining the rotation and translation vectors of the camera relative to the origin of the world coordinate system based on the optimal internal parameters; determining the world coordinates and rotation angles of the camera in the three-dimensional scene, and projecting the image after the distortion correction onto the three-dimensional face sheet corresponding to the picture position of the three-dimensional scene in the form of texture projection. Even in the case of a large difference between internal parameter templates, the method can quickly find suitable internal parameters, and the accuracy of projection is ensured.

The invention relates to a pulse delay automatic gain control method, which comprises the following steps of: determining an attenuation initial value under each power configuration after starting up according to a self-checking signal and a current environment temperature; the input radio frequency signal and the output radio frequency signal are detected in real time in the detection channel, peak value reading is carried out, and the signal amplitude is judged; reading an initial attenuation value of the current environment temperature under the current input signal, calculating a theoretical optimal gain value according to the detected output signal amplitude and the expected target output amplitude, and preferentially using the value to carry out power control; detecting whether a pulse signal arrives or not, if the difference between the current power and the target power exceeds an error threshold value, after the current pulse signal is ended or the longest signal period is ended, calculating a new gain control value according to the relationship among the attenuator characteristics, the voltage and the power, and performing amplification or attenuation processing on the output signal by adopting the new gain control value, and signals with stable amplitude are output. According to the invention, rapid and undistorted gain control of the pulse signal is realized.

The invention relates to a pressure control method, device and equipment based on an ethylene unloading working condition of a VAC device, a medium and a program product. The method comprises the following steps: determining a current working condition according to process characteristics; automatically switching a pressure control target according to the working condition and the pressure parameter; according to different working conditions, the pressure control points of the storage tank are dynamically adjusted in stages; reading an actual measurement value of a pressure variable, setting algorithm detection interval time, and obtaining a pressure change rate through differential calculation; the pressure control point serves as a target value, the actual pressure measurement value serves as a feedback value, the deviation between the target value and the feedback value is calculated, the deviation is processed through a PID algorithm, and an opening instruction of the ethylene backflow flow valve is output. Therefore, the operation condition of the device can be automatically identified, and a corresponding control strategy is matched. Automatic control over the pressure of the ethylene buffer tank in the whole ethylene unloading process is achieved; ethylene backflow is used as a core pressure control means, and the adjusting amplitude of the pressure control valve of the ethylene buffer tank is reduced.

This invention relates to a double-track supported rail grinding machine, belonging to the field of rail grinding technology. It solves the technical problems of cumbersome rail replacement, dangerous grinding operations for workers, and the inability to guarantee a safe grinding environment. The machine includes a main support frame with a sliding main frame, a sliding groove, a sliding rod inside the sliding groove, a locking groove in the sliding groove, a reset groove on the sliding main frame, a curved groove on the sliding rod, a reset push plate at the top of a spherical slider, a push spring on one side of the reset push plate, a reset push frame at one end of the push spring, a connecting frame inside the secondary sliding frame, an engine frame on the connecting frame, and a drive engine at the top of the engine frame. This invention moves the sliding main frame by pushing the sliding rod, and by adjusting and controlling the position of the sliding main frame, it can adjust and grind different rails without removing the structure, reducing the need for significant structural adjustments.

This invention discloses an intelligent fault prediction method for pneumatic valve islands based on multi-protocol integration, belonging to the field of pneumatic valve island fault prediction technology. It includes constructing a protocol sensing layer data cube by integrating multi-protocol edge gateways to synchronously collect multi-source sensor data under the same timestamp reference, based on the heterogeneous characteristics of the valve island's physical topology and protocols. This invention achieves a paradigm shift from macroscopic pressure judgment to microscopic feedforward early warning by constructing the protocol sensing layer data cube, fusing protocol-topology joint feature maps, quantifying microscopic flow stability, predicting flow reconstruction probability, generating dynamic multimodal intervention commands, verifying protocol adaptive closed-loop, and performing digital twin health simulation. This forms a complete intelligent prediction-intervention-optimization closed loop, enabling the system to intelligently replenish air and automatically adjust throughout the process, achieving zero-blockage operation of the valve island and significantly improving system reliability and maintenance efficiency.

The automatic online pulverized coal concentration adjusting device for the medium-speed coal mill is arranged at the upper end of the medium-speed coal mill and comprises a coal dropping pipe, at least four powder outlet pipes, an air powder measuring sensor, an air powder flow adjusting valve, a distributor, a separator, a control system and a manual adjuster, the manual regulator comprises a manual regulating plate, a shaft sleeve, a fork-shaped joint, a first spring, a connecting rod, a fixing plate, a second spring, a crank and a rotating shaft, the fixing plate is uniformly fixed on the outer circumference of the distributor below the powder outlet pipe, one end of the connecting rod penetrates through the fixing plate, and the other end of the connecting rod is fixed together with one end of the fork-shaped joint through a fixing nut; the rotating shaft is sleeved with the shaft sleeve through a bearing, one end of the rotating shaft is fixed to the other end of the crank, and the other end of the rotating shaft extends into the distributor and is fixed to the manual adjusting plate. And the first spring and the second spring are respectively arranged between one end of the connecting rod and the fixing plate and between the other end of the connecting rod and one end of the fork-shaped joint through fixing nuts.

The invention relates to the technical field of hoisting maintenance platforms, and discloses a nuclear power main pump motor integrated hoisting maintenance platform which comprises a main body and two connecting frames, the two connecting frames are fixedly connected to the outer wall of the main body, the tops of the two connecting frames are fixedly connected with connecting positioning frames, and the tops of the two connecting positioning frames are fixedly connected with stable extension frames. The device further comprises a hoisting mechanism which is arranged at the top of the main body and comprises a hydraulic lifting column. The main pump motor and the original position are always in a vertical state, the main pump motor can vertically descend after the main pump motor is overhauled, the phenomenon of large deviation between the main pump motor and the original position during resetting after the main pump motor is overhauled is avoided, the adjustment amplitude of the main pump motor can be reduced, and the adjustment efficiency of the main pump motor is improved. The situation that the position of the main pump motor is difficult to adjust accurately due to the fact that the size quality of the main pump motor is large is avoided, and the resetting installation accuracy and the installation efficiency of the main pump motor are improved.

The invention discloses a power distribution network reactive power compensation area cooperative control system of a reactive power compensation device, which comprises a cooperative control platform composed of a data acquisition unit, a data analysis unit, a reactive power compensation layout unit and a reactive power compensation unit, and relates to the technical field of power distribution networks. According to the power distribution network reactive power compensation area cooperative control system of the reactive power compensation device, data support is provided for calculation of a power grid compensation quantity value through collection of power grid voltage data and power grid current data, and a coordinate curve is generated according to the compensation quantity value and time in cooperation with a data analysis unit; reference data are provided for compensation value setting of fixed reactive power compensation equipment and compensation value setting of dynamic reactive power compensation equipment, the compensation value of the dynamic reactive power compensation equipment is adjusted in combination with calculation of real-time compensation values, the adjustment amplitude of the dynamic reactive power compensation equipment is reduced, and meanwhile the adjustment accuracy of the dynamic reactive power compensation equipment is improved. Cooperative control of fixed and dynamic reactive compensation on the power grid is realized, and effective support is provided for power transmission loss reduction of the power grid.

The present disclosure relates to a plasma generating system, comprising an arc drawing system, the arc drawing system comprising a gas storage tank (4), an air pressure control component and an arc drawing machine connected via a carrier air delivery path (3), the carrier air delivery path (3) being connected between an air outlet of the gas storage tank (4) and an air inlet of the arc drawing machine so as to deliver the carrier air in the gas storage tank (4) to the arc drawing machine, the air pressure control component comprising a plurality of control components, the plurality of control components being arranged on the carrier air delivery path (3) for multi-stage adjustment of the carrier air pressure in the carrier air delivery path (3). The plasma system carrier air pressure control component can solve the problem of unstable plasma carrier air pressure.

The application discloses a pneumatic valve island intelligent fault prediction method based on multi-protocol integration and belongs to the technical field of pneumatic valve island fault prediction, which comprises the following steps: according to the physical topology and protocol heterogeneous characteristics of a valve island, multi-source sensor data is synchronously collected under the same timestamp benchmark through an integrated multi-protocol edge gateway, and a protocol-aware layer data cube is constructed. The application realizes the paradigm shift from macroscopic pressure determination to microscopic feedforward early warning by constructing the pneumatic valve island intelligent fault prediction method based on multi-protocol integration. Through protocol-aware layer data cube construction, protocol-topology joint feature map fusion, microscopic flow state stability quantification, flow state reconstruction probability prediction, dynamic multi-modal intervention instruction generation, protocol adaptive closed-loop verification and digital twin health simulation, a complete intelligent prediction-intervention-optimization closed loop is formed, the system can intelligently supplement air throughout the whole process, automatically adjusts, realizes valve island zero pipe blockage operation, and significantly improves system reliability and operation efficiency.