37results about How to "Zero error" patented technology

The invention discloses a four-rotor aircraft control method based on PID neural network (PIDNN) control. First, dynamic equations of a four-rotor aircraft are established based on the Newton-Euler equations, and then, a nested controller is proposed. An inner loop decentralized controller is designed based on a PIDNN method to realize attitude control, and the outer loop adopts a classical PID control method. Next, online learning of a PIDNN controller is realized by an error back propagation method, the connection initial weight of PIDNN is determined based on the principle of PID control, and an appropriate learning step is selected according to the discrete Lyapunov theory to guarantee the convergence of the controller. Thus, the control problem of a four-rotor aircraft caused by high degree of nonlinearity, strong coupling and under-actuating capability, disturbance from the external environment in the process of flight and other factors can be effectively solved.

The invention discloses a true delay-based wideband phased array wave beam formation method comprising the following steps: after a received signal of each channel is transformed into a frequency domain, performing true delay compensation respectively; if the time domain delay of the signal is tau, representing additional phase in the frequency domain after Fourier transformation; and performing inverse Fourier transformation to the time domain after performing matched filtering so as to acquire a compensated signal. The method realizes precise delay through digital signal processing.

The invention discloses a lithium iron phosphate battery auto-discharge screening method. First, batteries are selected, and the voltage sudden change points of the batteries in the low-voltage stateare determined through low-current discharge. A produced battery is discharged at three currents decreasing gradually to a preset cutoff voltage, and is then charged and discharged at a low current within a narrow voltage range, in order to eliminate battery polarization to the greatest extent, make the final real voltage a sudden change voltage, and increase the accuracy of auto-discharge screening based on voltage drop. Through the method, whether a lithium iron phosphate battery meets the requirements can be determined in a short time, the production cycle of lithium batteries can be shortened, judgment is accurate, zero error can be basically guaranteed, the standing time of batteries can be shortened, and the supply rate can be improved.

The invention discloses a combat sports scoring system, which comprises at least two sensors which are arranged on attacking bodies or defensing bodies on sportsmen in two competition sides entering a field and are used for collecting signals, first conductors which are arranged in the at least two attacking bodies, second conductors which are arranged in the at least two defensing bodies, at least two identification controllers and at least one scoring processing device which is arranged on the periphery of the field, wherein each identification controller is preset with an ID identification code; outputs of the sensors are connected to inputs of the corresponding identification controllers; and the first conductors and the second conductors are connected to the corresponding identification controllers. According to the combat sports scoring system provided by the invention, combat signals can be collected by virtue of the sensors and the signals can serve as a scoring basis; and a plurality of scoring models can be designed, so that entertainment of combat sports can be greatly enhanced. The scoring system provided by the invention is applicable to two-person or multi-person combat sports.

The invention relates to a device for eliminating a clearance between a screw rod and a nut, which comprises the screw rod, a main nut, the nut and a bolt. The screw rod is inserted into an accommodating hole of the main nut, the screw rod is screwed with the nut, the nut is screwed into the accommodating hole of the main nut, and the bolt is screwed into a screw hole on the main nut and presses the nut; and one end of a spring acts on the nut, and the other end of the spring acts on a step. The spring is additionally arranged on the main nut, and the elasticity of the spring acts on the nut, so the device radically eliminates the clearance between the screw rod and the nut, achieves zero error so as to greatly improve the mechanical processing precision.

The invention discloses a merging unit based integral error verification system which comprises an electronic mutual inductor, a merging unit, a digital electric energy meter and a multifunctional measurement and control device. The electronic mutual inductor is connected with the merging unit to transmit a primary signal detected by the electronic mutual inductor to the merging unit; the mergingunit is connected with the digital electric energy meter to be detected to detect the digital electric energy meter; the merging unit is connected with an error comparison and calculation module in astandard digital electric energy meter, and verify the digital electric energy meter to be detected via the error comparison and calculation module; and the merging unit is also connected with the multifunctional measurement and control device. The system has the advantages that electric energy is accumulated on the basis of an FT3 message of high sampling rate of the electronic mutual inductor, the sampling value speed of the digital standard meter is improved substantially, electric energy of secondary and harmonic waves is metered, and a test result approaches a real electric energy value more; and a non-pulse verification method is used to improve the operational reliability and stability of metering equipment.

The invention discloses an intelligent puppet stage. A displayer is arranged above the rear end of a base, a computer host is arranged in one corner of the base, transverse guide rails are arranged in the base, a sliding module is arranged in each transverse guide rail, a motor is arranged at one end of each transverse guide rail, a puppet is arranged on each sliding module, a motor is arranged at one end of each transverse guide rail and controls the corresponding sliding module and the corresponding puppet to move, and the motors are connected with the computer host through numerical control lines; a support is arranged above the base, and a row of lamps is installed below a cross rod of the support. By transforming a traditional puppet stage intelligently, intelligent service can be provided through control and adjustment of a computer, unlimited control over the puppets, props and plot scenes on the stage can be achieved freely by conducting errorless calculation and analysis on the whole stage, so that errors caused by traditional manual work in actual operation are reduced, and refreshing viewing experience can be brought to audience efficiently with the scientific and intelligent instruction method.

The invention discloses a multi-unmanned aerial vehicle time-varying formation control method based on a synchronization strategy. Firstly, an ellipsoid equation with time-varying parameters is adopted to describe the formation of the unmanned aerial vehicles in a three-dimensional space; next, an unmanned system is divided into a position subsystem and an attitude subsystem, and a corresponding mathematical model is established, and a formation error formed by a position error of a single unmanned aerial vehicle and a synchronization error between the unmanned aerial vehicles is defined; andfinally, a control law of the position subsystem and the attitude subsystem is designed based on a sliding mode control method, so that the formation error of the unmanned aerial vehicles gradually tends to be zero. According to the multi-unmanned aerial vehicle time-varying formation control method based on the synchronization strategy provided by the invention, time-varying formation control ofthe unmanned aerial vehicles can be smoothly realized, and the complexity of coordination control on formation of the unmanned aerial vehicles is effectively reduced through decoupling, so that the unmanned aerial vehicle formation can be applied to tasks such as reconnaissance, rescue, cruising and the like.

The invention discloses an intelligent settlement system for buffet. The system comprises intelligent tableware, an intelligent heat-preserving table and an intelligent cashier desk, wherein the intelligent tableware is connected with a first intelligent reader-writer on the intelligent heat-preserving table through an intelligent chip, and is further connected with a second intelligent reader-writer on the intelligent cashier desk through the intelligent chip. The invention furthermore discloses a realization method of the intelligent settlement system for the buffet. By improving the tableware, the heat-preserving table and the cashier desk, a payment mode of the buffet is more intelligent, and even a cashier is not needed, so that the buffet settlement speed is increased, potential clients are retained, and the input of personnel cost can be reduced.

A locating device for accessory mounting of an A-320 aircraft radome is in a truncated conical shell shape; the internal surface of the locating device is completely fit with the external surface of an open end of the radome; corresponding holes are formed in positions, corresponding to accessory mounting holes in the radome, of the locating device; a solid structure of glass fiber fabric steeped with epoxy resin is arranged in a general position of a conical shell; a solid structure of the glass fiber fabric steeped with the epoxy resin is arranged at an accessary fastener mounting part; the glass fiber fabric steeped with the epoxy resin is arranged on the internal surface and the external surface of an easy deformation part; and a flexible NOMEX honeycomb core is arranged in the middle of the easy deformation part. The invention further relates to a fabrication method of the device. The device can keep a consistent structure with the original structure completely, fully meets locating requirements, is precise in location and quick and convenient to mount and dismount, saves time and labor, has no special requirements on skills of a worker and fills a blank in the field domestically at present.

The invention relates to an outdoor advertisement media monitoring system, and especially relates to an outdoor advertisement monitoring system and method. The system comprises a mobile terminal, a media advertisement terminal and a system terminal, wherein the mobile terminal, the media advertisement terminal and the system terminal are connected mutually through a wireless network. The system terminal is used for prestoring information of all monitored media advertisement terminals, and can carry out calculation analysis and processing on the received data information; the mobile terminal can carry out image acquisition, and sends the collected images to the system terminal; and the media advertisement terminal can guide the mobile terminal to enter an optimum acquisition area. The beneficial effects are that the system and method are high in practicality, greatly save maintenance cost, and enhance the advertisement propaganda effect when consumers carry out information acquisition; through the mutual connection of the mobile terminal, the media advertisement terminal and the system terminal, the optimized image information and the most accurate position information can be obtained, and the monitoring result is allowed to reach zero error; and the system and method are especially suitable for large-range popularization use.

The invention discloses a full-automatic flow cytometer which comprises a test analysis system, and the test analysis system comprises a sample loading disc, a sample loading needle, a front item detection plate, an electrical bin, a WDM module, a flow pool seat, a laser and a liquid path bin. And the sample loading needle is arranged at the upper right part of the sample loading disc. And the front detection plate is arranged on the right side of the sample loading needle. And the electrical bin is arranged at the right lower part of the front detection plate. And the WDM module is arranged on the right side of the front item detection board. And the flow pool seat is arranged above the front detection plate. And the laser is arranged on the left side of the flow pool seat. And the liquid path bin is arranged below the laser. According to the full-automatic flow cytometer, full automation of the whole process from sample pretreatment to detection report output can be realized, the test time consumption can be greatly reduced, the difference of manual consistency can be eliminated, and the test accuracy is greatly improved.

The invention relates to a cutting device of full-automatic color paper box product line, wherein it comprises a frame, a cutter above the frame, a transmitter above the frame to connect the cutter and paper feeder, a gear box 6 beside the cutter, and a main speed adjusting motor 7 beside the frame to connect gear box 6. Said frame comprises machine body 45, sliding bottom frame 4, and frame adjuster on the bottom frame 4; the cutter comprises cutting blade, blade adjuster beside the cutting blade, and paper feeder; the transmitter comprises speed transmitter connected to the gear box, transmitting rod connected to the paper feeder, and transmission band. The invention can save material and high accuracy.

The invention relates to an alloy flat belt winding device, which includes a base, on which a driving device is arranged, and the driving device controls a conveying device and a rotating shaft at the same time, and the rotating shaft is stuck in a fixing part, and an automatic shearing device is arranged on the left side of the fixing part, fixing There is a speedometer and a switch on the right side of the parts, and the speedometer comes with an alarm device and an infrared detector. The invention has the advantages of simple structure, low cost, fully automatic operation, zero error, high degree of cooperation, simple and convenient operation, reducing waste of human resources, improving work efficiency, and the constant speed instrument can effectively fix the speed of the rotating shaft, and wind the wire at a uniform speed, and the speed is fast , and good anti-skid effect, high safety, infrared detection, in case of abnormality, timely alarm, reduce losses and improve comprehensive economic efficiency.

The invention discloses a double-station automatic plate sending machine. The double-station automatic plate sending machine comprises a truss and a control cabinet. A material taking left-right moving module and a material taking up-down moving module are arranged on the truss, the material taking left-right moving module can drive the material taking up-down moving module to move on the truss, and two product feeding tables and a material pushing structure are arranged below the truss. The two product feeding tables are symmetrically arranged on the two sides of the material pushing structure, the material pushing structure comprises a material pushing up-down moving module and a material pushing front-back moving module, and a roller conveying device is further arranged at a dischargingport of the material pushing front-back moving module. According to the double-station automatic plate sending machine, operation is easy, convenient and accurate, the machine suction cup is high inadsorbability, and plate conveying is stable and efficient; and through multi-modular cooperative operation, the cost is greatly saved, and the working efficiency is improved.

The invention relates to the field of parameter calculation, in particular to a system and method of calculating serum neutralization antibody titer. The system of calculating the serum neutralization antibody titer comprises a recording module, a calculation module, a display module and a storing module, the recording module is used for recording measured experimental data, the calculation module is used for calculating intermediate data and serum neutralization antibody titer data according to the recorded experimental data, the display module is used for displaying the recorded experimental data and the calculated intermediate data and the serum neutralization antibody titer data, and the storing module is used for storing the recorded experimental data and the calculated intermediate data and the serum neutralization antibody titer data. According to the system and method of calculating the serum neutralization antibody titer, the serum neutralization antibody titer is calculated easily, conveniently, fast and accurately, the workload is little, and all the experimental data are effectively protected and stored, and can be remained for next check and use.

The invention relates to a vibration device special for a water-cooling vibration machine. The vibration device comprises a shell, the shell is connected with a finned heat dissipation plate, the finned heat dissipation plate is connected with an air cooler, and the air cooler is connected with a vibrator. The two sides of the vibrator are provided with vibration damper plates, the vibration damper plates are fixed to the inner wall of the shell through damping spring assemblies. The vibrator is connected with a constant speed device, the constant speed device is connected with a frequency changer, the frequency changer is connected with a variable frequency motor, the variable frequency motor is connected with a controller, and the controller is provided with an alarm. The vibration device is simple in structure, the finned heat dissipation plate is small in occupied area, the heat generated by the vibration machine is effectively lowered after the vibration machine is connected withthe air cooler, stability is improved, and the effect is good; vibration generated by the vibration machine is lowered through the damping springs and vibration damper plates, it is guaranteed that structural connection is tight, and safety performance is improved; consistency of vibration frequency of the vibration machine is guaranteed through the constant speed device, work efficiency is improved, energy is saved, consumption is reduced, the service life is prolonged, intelligent operation is performed through the controller, the accurate degree is high, and zero error is realized.

The invention discloses an open type three-jaw self-centering chuck. A chuck lower base and a chuck upper base are assembled together, a through hole is formed in the middle of the chuck lower base and the middle of the chuck upper base, annular grooves are formed on the chuck faces of the chuck lower base and the chuck upper base, and the annular grooves are concentric with the circle of the through hole; a clamping jaw driving screw assembly and a clamping jaw assembly are arranged at the 120-degree interval of the circumferences of the annular grooves in the circle center direction; a driving gear and a plurality of driven gear assemblies are further arranged in the annular grooves; the driving gear, the driven gear assemblies and a gear at the tail end of the driving screw assembly aremeshed with one another to form a motion relation; and a driving device is arranged outside the driving gear and on the side surface of the chuck lower base. The three-jaw chuck is self-centering, light in weight, large in clamping force and not prone to falling off, meanwhile, large stroke is achieved, clamping of long-shaft parts is convenient, the stroke of the long-shaft parts can exceed 60mmthrough clamping and loosening of the clamping jaw assembly, and the three-jaw chuck is suitable for shaft parts with various shaft diameters.

The invention discloses a test method of network management node calculation. The method comprises that a first statistical value of a network management node is read at first time, a second statistical value of the network management node is read at second time, the first and second time are two time of constant flow rate, a time difference between the first and second time is an integer times of a data update period of the network node, and the first and second statistical values are network management statistical values; a capturing packet tool is used to calculate a practical value corresponding to the network management node in a period from third time to fourth time, the third and fourth time are two time of constant flow rate, and a time difference between the fourth and third time equals that between the second and first time; and the practical value corresponding to the network management node is compared with the difference between the first and second statistical values. The invention also discloses a system for realizing the method.