19results about How to "Eliminate fluctuations" patented technology

According to the suspension bridge main cable strand erecting method and system, systematized control over erecting of the suspension bridge main cable strand is achieved through the complete processes of cable strand restraining frame installation, double-reference cable strand traction, linear adjustment, stability observation and conventional cable strand erecting. Firstly, the cable strand restraining frames are installed at equal intervals to provide a uniform supporting foundation for the cable strands, it is ensured that loads are distributed reasonably, and the risk of local stress concentration is reduced; the symmetrical arrangement of the double-reference cable strands covers the lower half part area of the main cable, the installation freedom degree of the conventional cable strands is remarkably reduced by adding positioning reference objects, and deviation accumulation caused by insufficient single-reference positioning is avoided; in the stability observation link, the reference state is judged through a preset threshold value, environmental fluctuation interference is eliminated, the long-term reliability of the reference cable strand as a reference is guaranteed, and a solid foundation is laid for subsequent conventional cable strand erection.

The present application relates to the technical field of program control systems, and in particular to a method for calculating the execution time of a PLC scanning task, including obtaining the operating status of the enabling end of the on-delay timer, obtaining the size relationship between the count value of the on-delay timer and the set value of the on-delay timer; according to the operating status and / or the size relationship, eliminating the timing error when the error condition is met, including assigning the calculated value of the scanning task execution time of the previous cycle to the calculated value of the scanning task execution time of the current cycle; and calculating the scanning task execution time in real time when the precise calculation conditions are met. The present application eliminates the calculation error of the PLC scanning task execution time, thereby eliminating the fluctuation of the production line control parameters and improving product quality.

The present application relates to the technical field of optical fiber coupling clamping positioning calibration, and discloses a kind of optical fiber coupling clamping positioning calibration method, optical fiber or lens clamping positioning is calculated with standard calibration piece theoretical coupling target position;With grating calibration plate establishes pixel mapping, calculates spatial displacement deviation;Generation multi-degree-of-freedom adjustment instruction controls five degrees of freedom and monitors coupling efficiency;Adopt random parallel gradient descent algorithm closed loop iteration until coupling efficiency reaches threshold value.The whole process closed loop control from initial clamping to final alignment of the optical fiber coupling clamping positioning calibration method improves coupling efficiency and repeat accuracy, calculates theoretical coupling target position by standard piece turnover measurement, thereby eliminating the system deviation of clamp and optical path, and accurate mapping of pixel and physical size is established using grating calibration plate, image distortion influence is eliminated, visual deviation is converted into spatial displacement deviation after driving adjustment, blind search is avoided.

The application provides a kind of based on visual detection's sports glasses dimming film evaluation method and system, it is related to sports glasses manufacturing technical field, its technical solution main point is: by obtaining positioning map, determine clamping offset and correct, convert image to uniform lens coordinate, compare the candidate abnormal area in different images and determine its stability, finally mark effective feature and determine evaluation result, effectively solve the problem that visual information is unstable in prior art due to clamping deviation and observation condition change, ensure the objectivity and accuracy of evaluation result, have by clamping offset correction and image coordinate uniform, effectively eliminate the visual information fluctuation caused by clamping deviation and observation angle change, ensure that visual information accurately reflects the real state of film, thereby improve the objectivity and accuracy of evaluation result.

The invention discloses a displacement and speed integrated sensor which is novel and reasonable in structure, a linear displacement measuring part is based on the LVDT sensor principle, the linear displacement measuring part and a speed passive sensing part are rigidly connected to ensure the synchronism of movement, and based on the design, the displacement and speed of a measured object can be directly observed at the same time, and the measurement accuracy is improved. The method is mainly suitable for occasions with high requirements for linear servo control, and the fluctuation problem and the speed phase lag problem caused by differential speed calculation can be fundamentally eliminated. Displacement is measured by adopting an LVDT principle, speed is measured by adopting a passive induction principle, the whole sensor adopts a tandem structure, a speed measuring rod is formed by a radially magnetized annular permanent magnet and a magnetic conductive rod, main magnetic flux can be effectively restrained without providing an external excitation signal, magnetic leakage can be reduced, interference of the magnetic leakage to speed gain parameters can be reduced, and the measurement accuracy is improved. And the measurement accuracy of the sensor is improved.

This utility model relates to the field of pile foundation testing technology, and discloses a low-strain vibration excitation device for pile foundations, including a main structure, a vibration head, a strain gauge, and a display unit. A mounting frame is provided at one end of the main structure, and a force transmission component is mounted on the mounting frame. The vibration head is connected to the mounting frame for contact with the pile to be tested. The strain gauge is located on the force transmission component and is used to detect the strain value generated by the force transmission component when the vibration head acts on the pile to be tested. The display unit is electrically connected to the strain gauge and is used to display the force value applied by the vibration excitation device to the pile to be tested. The strain value measured by the strain gauge can be used to calculate the magnitude of the reaction force on the force transmission component, and thus the excitation force applied by the vibration excitation device to the pile to be tested can be deduced. The display unit allows operators to intuitively see the excitation force applied in each vibration, facilitating the operator's understanding of the excitation force magnitude, improving the consistency and repeatability of low-strain pile foundation testing, and making the test data traceable.

The invention relates to the field of fluid pipeline smooth pulsation, and discloses a buffer used for a reciprocating pump and a reciprocating pump assembly, the buffer comprises a spherical shell (10), a liquid inlet pipe (20) and a liquid outlet pipe (11), the liquid inlet pipe (20) and the liquid outlet pipe (11) are connected to the shell (10), and the direction of the liquid inlet pipe (20) and the direction of the liquid outlet pipe (11) are staggered to allow fluid to rotate in the shell (10). By means of the technical scheme, fluid entering or discharged out of the reciprocating pump can form a rotary fluid form, fluctuation of the fluid is eliminated, and the stability of the fluid is improved; moreover, the rotating fluid is completely generated by the kinetic energy of the fluid, no mechanical moving part exists, and the device has the advantages of being wide in application range, high in reliability, long in service life, completely free of maintenance and the like.

This utility model discloses a continuous slicing device for traditional Chinese medicine decoction pieces based on automated control, including a feeding hopper, a distributor, a conveyor belt, a separator, a pressing mechanism, a slicing mechanism, a vibrating screen, and a power unit. The conveyor belt is divided into several conveying channels by the separator. A distributor is fixedly connected to one end of the conveyor belt at one end of each conveying channel, and the dispensing ports at the lower end of the distributor correspond to the conveying channels. A pressing mechanism is provided at the other end of each conveying channel, and its two sides are fixedly connected to the conveyor belt. A slicing mechanism is fixedly connected to one side of the pressing mechanism. A power unit is provided at the lower end of the conveyor belt, and both the distributor and the slicing mechanism are driven by the power unit. A vibrating screen is provided at one end of the conveyor belt. The purpose of this utility model is to provide a continuous slicing device for traditional Chinese medicine decoction pieces with high production efficiency, stable product quality, reduced reliance on manual labor, and reduced equipment wear.

The present application provides a method, device, air conditioner and storage medium for controlling the speed of an air conditioner's external fan, which relates to the field of air conditioning technology and solves the problem in the prior art that the air conditioner stops when the temperature reaches a certain level, affecting the comfort of the indoor temperature. The method for controlling the speed of an air conditioner's external fan comprises: obtaining the air conditioner's operating time, which is the accumulated operating time after the air conditioner is turned on this time; in response to the air conditioner's operating time being greater than a first time threshold, obtaining the indoor ambient temperature and the current speed of the air conditioner's internal fan; and controlling the speed of the air conditioner's external fan according to the temperature difference between the indoor ambient temperature and the preset temperature and the current speed of the air conditioner's internal fan to extend the period when the air conditioner stops when the temperature reaches a certain level.

The invention provides a multi-point casing vibration on-line monitoring system and method based on self energy taking, and the system is characterized in that the system comprises a control terminal, a plurality of detection modules, and an energy taking module; the control terminal is in wireless communication connection with the plurality of detection modules, the plurality of detection modules are arranged on the sleeve, and each detection module is connected with one energy taking module through a wire; the energy taking module is used for providing electric energy for the detection module; the detection module is used for collecting a vibration signal of the casing pipe in real time, processing vibration information and generating associated time stamp vibration information, associated time stamp comparison result information and associated time stamp early warning information; and the control terminal is used for storing and displaying the associated time stamp vibration information, the associated time stamp comparison result information and the associated time stamp early warning information. According to the system, the vibration signal of the sleeve is acquired in real time and then processed, so that potential safety hazards of the sleeve can be found in time, and a powerful guarantee is provided for stable operation of a power system.

The utility model relates to the technical field of medical instruments, and provides an oxygen inhalation equipment flow stabilizing device which comprises an output cylinder, a flow stabilizing device and a flow stabilizing device. The air inlet hole and the air outlet hole are positioned on the same side of the output cylinder; the piston is arranged in the output cylinder and slides in the output cylinder; the elastic piece is arranged in the output cylinder, and the two ends of the elastic piece are connected with the face, deviating from the air outlet hole, of the piston and the end, deviating from the air outlet hole, of the output cylinder correspondingly. The oxygen generator has the beneficial effects that the pressure fluctuation of oxygen can be counteracted by utilizing the elastic piece, the stability of oxygen output is ensured, and the treatment effect of a patient is further ensured.

This invention relates to a method for improving the accuracy of data sampling trigger signals based on a CT scanner gantry. The method includes: a static control board controller processing A and B quadrature pulse information transmitted from the encoder module of the slip ring and converting it into sampling trigger signals for the data acquisition system; the static control board controller processing the first n sampling trigger signals using a desired threshold to generate improved first n sampling trigger signals; the static control board controller using an improved Kalman filter to sequentially generate the improved nth and subsequent sampling trigger signals; and the static control board controller transmitting these signals through a slip ring command loop to a rotary control board, which then transmits them to the data acquisition system as trigger signals for sampling. The improved Kalman filter improves the accuracy of the data sampling trigger signals, offering higher real-time performance than average value filtering. Furthermore, by removing abnormal extreme measurements, it smooths the data and eliminates unnecessary fluctuations caused by abnormal extreme values.

This application provides a standard working time dynamic self-tuning method based on the PID algorithm, applied in the field of production management technology. It obtains a dataset of measured time consumption for a target task over multiple execution cycles, preprocesses the dataset to remove outliers, and obtains an effective working time feature set. The logical deviation between this effective working time feature set and the current target reference value is determined, and a PID control algorithm is executed based on this deviation to achieve precise control of the working time data. During the iterative update of the target reference value, an ELM prediction model is used to dynamically adjust the control parameters of the PID control algorithm based on historical deviation trends. Finally, when the fluctuation range of the target reference value and the prediction error meet a preset threshold, the final standard working time is output, ensuring the stability and accuracy of the standard working time. This method has the advantage of dynamically adapting to changes in the production environment and improving the accuracy and stability of the standard working time.

The present invention relates to a drilling fluid supply device for steady flow delivery, and relates to the technical field of drilling fluid delivery equipment. A front pre-storage component is connected to the input end of a circulating pump group, and a slow flow module capable of adjustable multi-stage buffering of the pulsating liquid flow outputted by the circulating pump group is arranged at the output end of the circulating pump group. The slow flow module comprises a rear variable capacity slow flow component, a rear multi-stage shunt component and an expansion stabilizing component connected in series in sequence. The rear variable capacity slow flow component absorbs and reduces the liquid flow pressure wave peak in a manner that can perform variable capacity slow release and adjustable energy absorption and vibration reduction on the pulsating liquid flow; the rear multi-stage shunt component completes the shunt pressure reduction of the liquid flow in a manner that can construct a multi-stage shunt channel according to the change of the pulsation intensity of the liquid flow, thereby realizing the secondary pulsation attenuation of the liquid flow. The present invention can buffer the periodically changing pressure fluctuation by constructing an adjustable deformation structure associated with the liquid flow pressure fluctuation, and also realizes the shunt pressure reduction and steady flow delivery of the liquid flow by constructing a multi-stage shunt channel.

The utility model relates to a closed refrigeration fraction collecting device which comprises a closed cabin and the following devices positioned in the cabin: a collector assembly used for collecting components separated by chromatography into a sample collecting module; the plurality of sample collection modules are used for collecting a sample solution; the temperature control module is located below the sample collection module and used for adjusting the temperature of the sample collection module, and the temperature control module is provided with an air inlet and an air outlet which are communicated with an inner cavity of the temperature control module; and an independent air duct is connected between the air outlet of each temperature control module and the exhaust outlet of the cabin, so that the airflow in the temperature control module is led out of the cabin. By adopting the design of the closed cabin body and the independent air duct, the pollution of samples can be effectively avoided, and the dissipation of volatile components can be prevented.

The invention discloses a distributed photovoltaic voltage out-of-limit treatment method for calculating line loss, and the method comprises the steps: calculating an active power instruction and a reactive power instruction which should be injected into a grid-connected point by a photovoltaic power generation system when the voltage of the grid-connected point is under an out-of-limit value level when the voltage detection result of the grid-connected point is out of limit; performing coordinate transformation on the modulation signal, performing constant amplitude transformation on the voltage of the grid-connected point, and directionally synchronizing the voltage of the grid-connected point into a rotating coordinate system to obtain a current reference value on a d-q coordinate axis; a current reference value on a d-q coordinate axis and an actual value are subjected to difference processing and sent to a PI regulator, a modulation signal obtained after coordinate system transformation is subjected to SVPWM modulation, an output signal obtained after modulation serves as a control signal of a photovoltaic grid-connected inverter, active power and reactive power of a photovoltaic injection grid-connected point are further adjusted so as to adjust the voltage of the grid-connected point, and the voltage of the grid-connected point is adjusted. The bus of the power distribution network can receive the maximum active power, so that the line loss is reduced, and the energy waste is avoided.

This invention discloses a method for optimizing the electromagnetic parameters of a micro servo motor, belonging to the field of motor design technology. The method includes: determining a one-dimensional analytical initial flux linkage value based on pre-inputted motor geometric dimensions and material property data; generating initial parameters containing air gap flux and cogging torque harmonic amplitudes through a surface mapping function; importing the initial parameters into a finite volume method differential solver and introducing a transposition method to construct boundary conditions, obtaining a corrected air gap flux density waveform; establishing a target optimization function based on the corrected air gap flux density waveform and the initial parameters, this function containing torque density and electromagnetic loss components; optimizing the winding turns, pole arc coefficient, and magnet thickness using a sequential quadratic programming method to obtain an optimized parameter range; and determining the final electromagnetic parameter set within the optimized parameter range using numerical extrapolation.

The application discloses a multi-unmanned platform-oriented situation information fusion method and device, and the method comprises the following steps: obtaining geographical space data information and a multi-source sensor detection information set of multiple unmanned platforms; the multi-source sensor detection information set comprises multi-sensor detection information of each unmanned platform; the multi-sensor detection information comprises infrared detection information and radar detection information; performing track fusion estimation processing on the multi-source sensor detection information set to obtain a track information set of the unmanned platforms; the track information set comprises track information of each unmanned platform; loading the track information set into the geographical space data information to obtain situation information of the unmanned platforms; and performing visual display on the situation information.

This invention provides an automated carbon fiber wheel rim manufacturing process, belonging to the field of wheel rim manufacturing technology. It solves the problems of low efficiency, poor quality consistency, and insufficient process stability in existing wheel rim processing. This invention employs a dedicated pre-forming equipment, mainly comprising fixture one and fixture two. Fixture one is primarily used to bend flat and rod-shaped profiles and preliminarily assemble them into a basic ring structure (ring body one). Fixture two is used to further attach yarn sheets, add reinforcing round bars, install sealing plates, and assemble with the pre-made outer ring body, ultimately forming a complete wheel rim blank. The entire process, through the coordinated operation of multiple drive mechanisms, achieves automated processing of the wheel rim pre-form, improving production efficiency and molding accuracy.