134results about How to "Guaranteed error" patented technology

The invention discloses a manufacture technology for a hatch coaming and a hatch cover. The manufacture technology mainly comprises steps of the positioning of the hatch coaming, the surplus cutting, welding, then the assembly of the hydraulic equipment, pipelines and the electrical equipment, and then the hoisting of the hatch cover, the installation and the final debugging; the hatch coaming and the hatch cover adopt the following steps that firstly the actual main deck line type of the position of a dock where the hatch cover is positioned is copied onto a platform, and then positioning, the accurate detecting and welding are carried out according to the shape and the height of the hatch coaming on the platform; then the hydraulic equipment, the pipelines and the electrical equipment are assembled, after that, the hatch cover is hoisted; and finally the whole manufactured hatch coaming and the hatch cover are hoisted in a hatch position for one time and to be fixedly connected with a boat. Through the technology, the hoisting frequency of a gantry crane is reduced during the hoisting process, the hoisting time is reduced, and the hoisting efficiency is improved; the construction on the platform enlarges the usable operating region, and simultaneously the construction is more convenient and securer.

The invention provides an image processing method and device based on a convolutional neural network model. The method comprises: obtaining a first weight parameter set corresponding to a neural network layer, wherein the first weight parameter set comprises N1 first weight parameters, and N1 is an integer larger than or equal to 1; calculating the ratio of the N1 first weight parameters to the first numerical value m respectively, and obtaining N1 second weight parameters, wherein m is larger than or equal to |Wmax| and smaller than or equal to 2|Wmax|, and Wmax is the weight parameter with the maximum absolute value in the first weight parameter set; quantizing the N1 second weight parameters into the sum of at least two Q powers of 2, and obtaining N1 third weight parameters, wherein Qis smaller than or equal to 0, and Q is an integer; and obtaining a to-be-processed image; and processing the to-be-processed image according to the N1 third weight parameters to obtain an output image. According to the invention, errors caused by weight quantization can be reduced, so that precision loss is reduced.

The invention uses a bilayer structure; in which, the outer layer is made of a kind of materials that has high conductance and high absorption of electromagnet wave; the inner layer is made of a high reflection and low absorption. The method comprises: setting the sweeping frequency and dotting frequency; starting the wave mode agitator; transmitting the dotting frequency in stepping, respectively sampling the signals of dotting frequency from antenna and detecting ware; counting and analyzing the signals to decide if it fits the character of uniform field; making the dotting frequency process and sweeping frequency synthesis; saving them; making count and analyzes for the sweep data from the antenna the detection ware; figuring out the electromagnet shield effect.

The invention is realized by a subsystem in a 'container pier manufacturing process control and visualization management system'. A movable station system comprises a B-1.GPS satellite receiving antenna, a B-2.GPS receiver, a B-3.8750 vehicle machine and a movable station processing system, a B-4. multi-functional controller (control circuit), a B-5. RTG engine and a control circuit, etc. A flow computer software is controlled to operate by the movable station system. The system achieves the aim of ensuring a container lifting accuracy to be 100 percent and a location precision to be equal to or less than 20CM by controlling the motion of an RTG twist lock mechanism. The invention has the advantages of simple principle, convenient realization and low cost, which is applicable to various (PLC, relay, etc) RTG to use; the invention achieves running security of an RTG heap through controlling the motion of an RTG cart running mechanism; the invention can optimize technique, shorten technique jointing time, increase engine overloading rate, improve working efficiency and reduce operation cost through automatic tracing, automatic collecting and automatic feeding back by the RTG manufacture information.

The invention discloses a high-precision current sampling circuit used in a servo system. The circuit comprises an integrated Hall current sensor circuit, an operational amplifier and a clamping circuit, wherein a current sampling channel of the integrated Hall current sensor circuit is connected with a phase line of a servo motor in series so as to convert a current signal of a phase line into an analogue voltage signal in a proportional relation; the output end of the integrated Hall current sensor circuit is connected with an in-phase end of the operational amplifier; the operational amplifier amplifies the voltage signal and performs level conversion; the output end of the operational amplifier is connected with the clamping circuit; and a clamping circuit protection voltage signal is input into an analog-to-digital conversion unit of a DSP. The high-precision current sampling circuit has the advantages of high linearity and high precision.

The invention provides a train automatic driving control system and method with a preset performance, and belongs to the technical field of train operation control. According to the system, through atrain operation strategy optimization module, a target position-speed curve is generated, and is converted into a target time-position curve and a target time-speed curve; the current position of thetrain is calculated in real time through a train position protection module, and the target time-position curve is combined to calculate a train virtual control law; the current speed of the train iscalculated in real time through a train speed protection module, and the target time-speed curve and the virtual control law are considered to calculate an actual control law of the train; train operation is controlled according to the actual control law through the train control module. According to the method and system, it is guaranteed that the position tracking error and the speed tracking error of the train are within a preset range, so that the tracking control precision of the train is improved, the probability of braking caused by poor control performance is effectively reduced, meanwhile, the margin between the target curve and a protection curve can be reduced, and the train operation efficiency is improved.

The invention belongs to the field of photovoltaic power-grid generating, and specifically discloses a photovoltaic grid-connected inverter comprising electric energy quality processing, and a control method thereof. The photovoltaic grid-connected inverter comprises a photovoltaic assembly PV, an energy storage capacitor C, an inverter and a digital signal processor (DSP), wherein the DSP internally comprises a PI adjuster, a phase-locked loop module (PLL) and a hysteresis comparator, the photovoltaic assembly PV and the energy storage capacitor C are connected with the DC side of the inverter, the AC side of the inverter is connected with a power network through a filtering inductor, and the DSP samples capacitance and voltages of the DC side and power network voltages and currents of the AC side in real time. According to the invention, a dual-hysteresis SVPWM is employed, when error currents are quite large, single-hysteresis control is employed, and errors are rapidly reduced; and when the error currents are quite small, hysteresis SVPWM control is employed, space areas of error current and reference voltage vectors are detected in real time, while control precision is ensured, only signals of one group of legs of the inverter are changed in a switching process of an output voltage vector, and the switch frequency is reduced.

The invention belongs to the field of ballastless track detection, and particularly discloses a ballastless track elastic fastener damage identification method. The method specifically comprises the steps of establishing and optimizing a lossless finite element model, and determining a lossless rigidity coefficient of the elastic fastener; measuring actual exciting force data and actual acceleration time history data; substituting the actual exciting force data into the lossless finite element model to obtain simulated acceleration time-history data; according to the actual acceleration time-history data and the simulated acceleration time-history data, calculating an actual rigidity coefficient of each elastic fastener by utilizing an MCMC method; and judging whether the ratio of the actual stiffness coefficient to the lossless stiffness coefficient is 1 or not, if so, determining that the elastic fastener is not damaged, and if not, determining that the elastic fastener is damaged. According to the method, the influence of uncertain factors can be eliminated during testing, and only the damage condition of the elastic fastener is considered, so that the damage identification accuracy of the ballastless track elastic fastener is effectively improved.

The invention is applicable to the technical field of lens machining and provides a jig and a method of using the jig for machining camera lenses. The jig comprises a first jig and a second jig, the first jig is provided with grooves used for placement of to-be-machined lens materials, and ejector pins vertically extend at positions, corresponding to the grooves, of the second jig and can be embedded in the corresponding grooves. The to-be-machined lens materials are placed on the jig, the jig can be fixed by a CNC (computer numerical control) machine tool by means of vacuum suction due to the fact that the size of the jig is larger than that of the lens materials, and accordingly CNC machining can be carried out. By means of the CNC machining process, adoption of a profiling machine for profiling and a beveling machine for beveling in the traditional process is replaced, and manual intervention is reduced; in addition, owing to precision of CNC equipment, profiling and beveling procedures can be completed on the lens materials for one time by the aid of a CNC tool, and product production time is shortened while production efficiency and product yield are increased on the premise that external dimensions of products are guaranteed.

The invention discloses a method for simulation temperature measurement of a rubber tire and a device thereof, which adopt rubber mass actually used to produce the rubber tire to make a small piece of rubber tire sample, and put a temperature-measuring thermocouple into the rubber tire sample which is then placed between an upper and a lower template of a rubber tire simulation temperature-measuring device to heat for vulcanization, then measure the temperature of the rubber tire sample by the temperature-measuring thermocouple arranged in the rubber tire sample and a temperature-measuring meter connected with the thermocouple to get the corresponding vulcanization temperature. Compared with the prior art, the method and device not only increase times of temperature measurement by adopting partial temperature measurement of the rubber tire instead of overall temperature measurement, but also save labor, material and financial resources, reduce cost of temperature measurement greatly, and improve efficiency of temperature measurement.

The invention belongs to the technical field related to new technology on electrical engineering, and discloses a method for measuring the resonant frequency of a coil and applicable to a wireless power transmission system. The method comprises the following steps that (1) a measuring system is provided, the measuring system comprises two identical and spaced single-wire coils which are used as atransmitting coil and a receiving coil separately, the transmitting coil is connected with an alternating current power supply, and the receiving coil is connected with a load, meanwhile, a coil to bemeasured in the wireless power transmission system is placed between the transmitting coil and the receiving coil, and the distance between the coil to be measured and the transmitting coil is equalto the distance between the coil to be measured and the receiving coil; and (2), a variation curve of scattering parameter module values of the measuring system with the frequency of the alternating current power supply is obtained, wherein the frequency of the alternating current power supply corresponding to the peak value of the variation curve is the resonant frequency of the coil to be measured. The method for measuring the resonant frequency of the coil and applicable to the wireless power transmission system improves the accuracy and efficiency and simplifies the analytical method.

The invention relates to a stable cutting device with a position limitation structure for tempered glass production. The stable cutting device comprises a base plate, a movable rod, a guide plate, a fixed clamp block and a cutter head, wherein a lower support rod is fixed above the base plate. Through the arrangement of a position limiting rod, the glass can be subjected to position limiting treatment; the dimension deviation during the cutting is enabled to be avoided, so that the qualification rate of the cut glass can be improved; meanwhile, the connecting block and an invisible groove forman elastic structure through a third spring; the glass with the area being greater than a cutting table can be subjected to fixing treatment; the practicability of the device is improved; meanwhile,the duplex fixing treatment is performed on the glass through a suction disc; during the cutting, the glass cannot swing or deviate, so that the dimension error of the cut glass is enabled to be in areasonable range; through the arrangement of the upper support rod and the lower support rod, the cutting disc can be subjected to stable support treatment; through the arrangement of the through hole, the second spring and the clamp rod, the height sum of the lower support rod and the upper support rod can be regulated.

The invention relates to a dual-band high-precision ranging aerospace ground system. The dual-band high-precision ranging aerospace ground system comprises a ranging baseband (1), a digital switch matrix (2), a transmitting digital front end (3), a receiving digital front end (4), an S high-power amplifier (5), a Ka upgoing high-stability channel (6), a Ka high-power amplifier (7), an S-field amplifier (8), a Ka-field amplifier (9), a Ka downgoing high-stability channel (10), a main antenna (11) and a zero calibration device. The zero calibration device includes an offset antenna (12), an S duplexer (13), an S zero calibration frequency converter (14), a Ka duplexer (15) and a Ka zero calibration frequency converter (16). The dual-band high-precision ranging aerospace ground system can complete the precise bidirectional distance measurement for a satellite carrying a high-precision ranging transponder, can further be used for high-precision bidirectional distance measurement of other common aircraft, has the characteristics that the measurement precision is high, adaptability to target dynamics is large, no-fuzzy distance is long, anti-interference ability is high and the like, andis particularly suitable for high-precision measurement orbit of satellites or spacecraft.

The invention discloses a sharp blade strip cutter detection method and device. The method includes positioning a standard cutter in a reference position; allowing a detection head device to contact with the detection position, namely the front cutting blade, rear cutting blade or front cutter face, of the standard cutter, detecting the detection position of the standard cutter, and acquiring reference data; recording the reference data; positioning a cutter to be detected in the reference position, allowing the detection head device to detect the position of the cutter to be detected corresponding to the detection position of the standard cutter, comparing the detection data with the reference data, and outputting the comparison result. The detection of the shapes of multiple cutters is implemented, the error of the sharp blade strip cutter is controlled in the certain range effectively, and the detecting efficiency is improved effectively as compared with that of the single manual detection operation on the sharp blade strip cutter.

The present invention discloses an ultra high voltage transmission line air gap rain flash test device and method. The device comprises a test line, a test tower, a pressure device, a rainwater spraying device and a rainfall control device, the rainwater spraying device comprises a spraying rack, a mounting plate, a plurality of nozzles, a speed regulation water pump and a spraying angle control motor, the rainfall control device comprises a rainfall sensor, an A/D conversion module and a signal processing module, the rainfall sensor is connected with a signal processing module through the A/D conversion module, and the signal processing module is connected with the speed regulation water pump and the spraying angle control motor; and in the condition that the actual rainfall simulated by the test device reaches the standard rainfall, multi-time impact voltage is applied to the test line, and the air gap rain flash voltage is calculated according to the discharging condition of the air gap. The ultra high voltage transmission line air gap rain flash test device and method can automatically perform artificial rainfall and regulate the spraying angle and water volume in real time to simulate different rainfall conditions and improve the accuracy of the rain flash test result.

The invention discloses an online weighing device for steel billets. The device comprises a stand, a lifting device and a weighing sensor. The device is characterized in that the stand is supported on a roller way of a continuous casting machine in a transverse mode, a beam which is perpendicular to the conveying direction of the roller way of the continuous casting machine is arranged on the stand, the lifting device is connected to the stand, the lifting device slides to the position of one of the steel billets on the roller way of the continuous casting machine along the beam, the weighing sensor is connected under the lifting device, a weighing lifting hook is arranged under the weighing sensor for lifting the steel billets, and two or more groups of the lifting devices and the weighing sensors are arranged in the conveying direction of the roller way of the continuous casting machine. According to the online weighing device for the steel billets, the investment and construction cost are low, the device can be conveniently installed on the spot in an existing rolling production line, the structure is simple, the construction is facilitated, the construction period is short, the measuring is accurate, the operation is convenient, and the device has a temporary lifting function when the conveying of uniflow steel billets is faulted.

The invention provides a smart city rail transit engineering acceptance detection system and detection method, and relates to the technical field of rail construction. The smart city rail transit engineering acceptance detection system comprises a traction walking vehicle, a detection device, a traction rope and a line drawing assembly. The traction walking vehicle is installed on a steel rail ofan urban rail, the detection device is installed on the steel rail, the rear portion of the traction walking vehicle is connected with the traction rope, the detection device is dragged by the traction rope to move on the steel rail, and the line drawing assembly is installed on the detection device. According to the invention, the traction walking vehicle walks on the detection device; in the walking process, the distance between the two steel rails, the levelness between the two steel rails and the levelness of the top face of the single steel rail can be synchronously detected; and evidenceobtaining is facilitated through the detected multiple sets of data and the left measuring track, whether the smart city rail transit engineering is qualified or not is accurately judged, and the accuracy of acceptance detection is improved.

The invention discloses a method and a system for enhancing an effect of a multichannel system. The method comprises the following steps of obtaining coordinates of speakers at vertexes of a regular polyhedron when a speaker array is put in a regular polyhedron structure manner, constructing new speaker putting points, obtaining position information of the new speaker putting points and computing initial allocation signals of all speakers; allocating speaker signals at the new speaker putting points to the speakers at the vertexes of the regular polyhedron; and obtaining a final allocation signal of each speaker at the vertex of the regular polyhedron through a summation method and deleting the speakers at the new speaker putting points. According to the technical scheme of the invention, the decomposition components of spatial information can be increased, the physical properties of the sound at the original point, the left ear and the right ear are more fully kept, and the method and the system are beneficial to enhancement of a reconstruction effect of the multichannel system.

The invention discloses a laser positioning system which includes a control module used for controlling the operation of other modules, a laser positioning module used for positioning a target, an operation module used for data input, a wireless transceiver module used for being connected with other remote terminals, a data storage module used for storing collected and processed data, a positioning execution module used for issuing an executing instruction according to a positioned target, a motor driving module used for receiving the instruction issued by the positioning execution module andconverting the instruction into an actual action, and a position feedback module used for making signal feedback for a changed position. The invention further presents a positioning method of the laser positioning system, which includes the following steps: S1, starting a laser positioning module; S2, starting a positioning execution module; S3, positioning; and S4, calibration. The laser positioning system of the invention has high work efficiency and high positioning accuracy, has a self-calibration function, is quick in laser output, and is suitable for popularization.

The invention provides a fishery culture monitoring system and method based on fish collection class acoustic monitoring and positioning. The system comprises a culture facility, an aquatic independent patrol inspection platform, a plurality of positioning arrays and a control center, wherein the culture facility is a cuboid; the plurality of positioning arrays are independently fixed on differentpositions of the culture facility; the control center is in communication connection with each positioning array; and the aquatic independent patrol inspection platform and the control center are incommunication connection and are arranged in the culture facility. By use of the fishery culture monitoring system and method based on the fish collection class acoustic monitoring and positioning, anunmanned vehicle is adopted to serve as an acoustic detection carrier, and the unmanned vehicle is positioned through a detection signal, the trajectory planning of the unmanned vehicle is finished through positioning information, an acoustic signal combines detection and positioning functions into a whole, so that the bearing capacity of the unmanned vehicle is greatly saved, the integration level and the stability of equipment are improved, and equipment cost is lowered.

The invention discloses a least square fit based star magnitude calibration method used for solving the technical problem of poor precision of an existing star magnitude calibration method. The technical scheme is to classify fixed stars on the basis that the star magnitude of the fixed stars and the grey of the fixed stars are known, select a training fixed star as a least square fit parameter, fit a relation function of the grey and the star magnitude of the fixed stars, then calculate the star magnitude of a tested fixed star by utilizing the trained relation function, compare the star magnitude of the tested star with the known star magnitude, calculate a calibrated error of the star magnitude of the fixed stars, test precision of a fitting model, and finally calculate the star magnitude of the to-be-tested star by using the function. As the least square fitting method is adopted for fitting the star magnitude and the grey value function, the error of the star magnitude calibration is enabled to be minimum, the star magnitude and the grey value in the calibration are ensured to in correspondence at any time, robustness of the fragment star magnitude calibration result is ensured, and precision of star magnitude calibration is improved.

The invention discloses a method for high-throughput detection of transgenic corn by virtue of a micro-fluidic chip. The micro-fluidic chip which contains not less than 20 reaction pores in each column of fluid channels and has not less than 3 columns of the channels, wherein the reaction pores of each column of the fluid channels are respectively embedded with 20 groups of specific primer probe compositions as shown in SEQ ID NO.1-60 in advance. According to the method disclosed by the invention, a TaqMan Array Card micro-fluidic chip detection technology is applied to the high-throughput screening detection of a transgenic corn line; in a polymerase chain reaction (PCR) amplification process, the screening detection of 2 corn endogenous genes and the screening detection of 18 exogenous recombinant lines are simultaneously completed, and the detection sensitivity can reach up to 1%. Compared with a single detection, the method can be used for detecting the endogenous genes and the exogenous genes in one PCR amplification reaction, thereby effectively avoiding possible errors caused by misoperation in experiments; and therefore the high-throughput screening detection of multiple samples and multiple gene targets can be achieved.