58results about How to "Reduce the error factor" patented technology

The invention relates to a vehicle positioning and speed measuring method based on the dynamic video feature of a vehicle, belonging to the technical field of intelligent transportation and close-range photogrammetry. The vehicle positioning and speed measuring method comprises the following steps: judging the vehicle dynamic video feature size in a video image within any time quantum in one video monitoring system according to vehicle dynamic feature parameters extracted from the video image which calibrates a vehicle traveling process, and reconstructing and reducing a dynamic video feature model of a to-be-measured vehicle traveling process corresponding to each image frame; and calculating an actual position and a vehicle speed value sequence corresponding to each image frame in the to-be-measured vehicle traveling process according to a mapping relation between the dynamic variation characteristic of the image feature size of a vehicle to be measured and the actual vehicle movement parameters, and thus acquiring the actual position and traveling speed information of the vehicle. The vehicle positioning and speed measuring method is easy to realize and high in accuracy, and is applicable to the demands of various vehicles on speed measurement in a road traffic video monitoring system.

The invention relates to a method for measuring the mass concentration of a particulate matter. A processor controls a sampling pump so that airflow enters from a particulate matter collecting unit, atmospheric particulate matter information is acquired, whether an instrument needs to be calibrated is judged, a beta-ray calibration module is started to calibrate the parameter values of a light scattering measurement module if calibration is needed, and the light scattering measurement module is turned on after the parameters are calibrated; and if calibration is not needed, the light scattering measurement module directly carries out measurement. By combining a light scattering method for measuring the concentration of the particulate matter with a beta-ray method, the measurement is accurate and data are directly read on line in real time; the beta-ray calibration module and the light scattering measurement module share one gas path, so as to ensure that various conditions in the calibration process are consistent and reduce error factors; and the parameters of the light scattering measurement module are calibrated by using the beta-ray calibration module when the measurement environment is changed, and the light scattering measurement module is separately utilized to measure the concentration of the particulate matter when the measurement environment is not changed.

The integral detection and measurement method of metering performance of high voltage power meter belongs to the field of measurement technology. The method includes connecting high voltage voltage / current generator unit, voltage / current regulating unit, data comparator unit, control and data processing unit, and standard high voltage metering unit with the high voltage power meter to be measured; applying one sequence of voltage and current to the standard high voltage metering unit and the high voltage power meter to be measured to obtain one set of standard power values and one set of measured power values; comparing these two sets of power values in the data comparison unit and feeding the comparison results to the control and data processing unit; calculating the metering error based on the given formula and outputting the measurement results.

The invention discloses a quick measurement method and device of underwater sound transmitting transducer wideband sending response, and belongs to the field of the underwater sound transducer measurement. The method comprises the following steps: placing a to-be-measured underwater sound transmitter transducer in a reverb pool, producing wideband continuous white noise signals by a signal producer, and amplifying and stimulating the underwater sound transmitting transducer to emit a sound signal through a power amplifier, utilizing a standard hydrophone with known sensitivity at a reverb control area of the reverb pool, and measuring the reverb sound field space average sound pressure through the standard hydrophone by adopting a standard hydrophone space scanning motion method, and thencomputing the sending response of the underwater sound transmitting transducer. By adopting the method disclosed by the invention, the wideband measurement of the underwater sound transmitting transducer can be realized, the method has the advantages of being accurate in measurement result, simple in measurement step and high in efficiency; in the same reverb pool, the lower limit frequency measured by adopting method disclosed by the invention is lower than the lower limit frequency of the pulse sound technology.

The invention discloses a three pairs of sliding pair-spherical hinge-spherical hinge (3-PSS) mechanism-based coordinate measuring machine. The 3-PSS mechanism-based coordinate measuring machine is characterized in that: a three pairs of sliding pair-spherical hinge-spherical hinge parallel mechanism is provided; three motion sliding blocks are independently arranged on a pair of ball guide rails which are arranged in parallel and can slide freely along the ball guide rails respectively; the three motion sliding blocks are connected with one end of each of three pairs of link rods through one end of a universal joint respectively; the other end of each of three pairs of link rods are connected with a measuring moveable platform through the other end of the universal joint respectively; a measuring head is arranged on the lower plane of the measuring moveable platform; three indication gratings are fixedly connected to the three motion sliding blocks respectively; a scale grating and the pair of ball guide rails are arranged in parallel and are arranged on the guide rail mounting surfaces of guide rail cross beams; and the guide rail cross beams are suspended and fixedly connected to a pair of brackets. The 3-PSS mechanism-based coordinate measuring machine has high rigidity, a simple structure, high processing assembly property and low cost and can measure the three-dimensional space sizes, the shapes and the mutual positions of parts quickly and precisely.

The invention discloses a portable bus hydraulic punching machine and a punching method. The hydraulic punching machine at least comprises a hydraulic punching machine main body, a hydraulic punching machine bottom plate, a scale mother blank side bracket, a movable scale set I, a movable scale set II, a scale mother blank for positioning scales, and a protective upright post; a perforated fixed hydraulic punching machine and the scale mother blank side bracket are arranged on the hydraulic punching machine bottom plate; after supporting and accurately positioning the scale mother blank, the scale mother blank side bracket properly prolongs the length of the scale mother blank to the positive direction of the hydraulic punching machine main body, and keeps the height of the scale mother blank accordant with the punching plane of a hydraulic punching machine static impact mill; the scale mother blank is provided with two inverse trapezoidal positioning tenons for accurately positioningthe scale set I or the scale set II; and the scale set I is used for a vertical alignment method, and the scale set II is used for a planar alignment method. The portable hydraulic punching machine punches a bus based on the punching requirement of a bus connection form by using a scale I or a scale II with graduation as a reference of a bus punching circle center.

The invention discloses a feeding, discharging and positioning device suitable for a robot feeding and discharging flexible production line. A fork-shaped feeding and discharging device, a plurality of pull nails, an auxiliary workbench and a plurality of zero point positioning systems are included. The multiple pull nails are evenly arranged on a rapid replacement tray, two lug plates provided with positioning holes are arranged, and an RFID code is fixed to the corner. A robot flange assembly is fixed to the center of a transverse arm of a U-shaped fork-shaped assembly, a position sensor anda code reader are fixed to the two ends, and positioning pin installing holes for fixing positioning pins are formed in the two vertical walls. The zero point positioning systems are fixed to the positions, corresponding to the pull nails, of the auxiliary workbench. During work, the positioning holes of the rapid replacement tray are inserted and connected in the positioning pins of the fork-shaped assembly. The pull nails are arranged in pull nail zero point positioning holes of the zero point positioning systems, and inverted cone faces of the upper ends of the pull nails are clamped and connected in inverted cone holes of the zero point positioning systems. The feeding, discharging and positioning device is used in the robot feeding and discharging flexible production line, can adaptto diversity of workpieces and is high in recognition accuracy, good in grabbing reliability and high in zero point positioning precision.

The invention discloses a positioning system and positioning methods which can be used indoors. A method comprises the steps of S1, measuring a LBS (Location Based Service) base station coordinate, specifically, obtaining a mobile terminal GNSS (Global Navigation Satellite System) coordinate based on GNSS signal positioning features through utilization of an outdoor environment, sending a positioning request message by a mobile terminal to a positioning service center, sending a positioning message by the positioning service center to the mobile terminal, sending a positioning message reply message, computing the positioning message reply message to obtain a pseudo range from the mobile terminal to an LBS base station, and computing the LBS base station coordinate through utilization of the pseudo range and the GNSS coordinate of the mobile terminal; and S2, computing a mobile terminal coordinate, specifically, sending the positioning request message by the mobile terminal, sending thepositioning message by the positioning service center to the mobile terminal, receiving the positioning message by the mobile terminal and a WPS (Wide band Positioning Station), sending positioning message reply messages by the mobile terminal and the WPS to the positioning service center, comparing and computing the positioning message reply messages of the mobile terminal and the WPS to obtainthe pseudo range from the mobile terminal to the LBS base station, and computing the mobile terminal coordinate through utilization of the pseudo range from the mobile terminal to the LBS base stationand the LBS base station coordinate.

The invention provides a fiber metal laminated plate forming device and method. A fiber metal laminated plate is processed by means of the hydraulic supporting and auxiliary heating numerical controlincremental forming technology. On a numerical control incremental forming machine tool, a forming tool head controlled through a mechanical program is arranged above a frame-shaped upper forming fixture and a frame-shaped lower forming fixture in advance. A box with an upward opening is additionally arranged in a cavity of the lower forming fixture. The laminated plate is clamped between the upper forming fixture and the lower forming fixture. The box is connected with a pressure control system and a temperature control system through a pipeline. In the process of incremental forming, a hydraulic control system is used for controlling ingoing, outgoing, heating and cooling of hydraulic oil to guarantee that the pressure and temperature borne by the laminated plate to be uniform and constant in the forming process. Accordingly, the good mechanical performance of the laminated plate is guaranteed, and the forming quality of products is improved.

The invention discloses a method for automatically distributing accuracy indexes of a ballistic missile inertia measurement system. The method includes solving drop point accuracy values and drop point deviation proportions of error coefficients according to set environment function values and initial values of the inertia measurement system error coefficients, and comparing the calculated drop point accuracy values with drop point accuracy threshold values; if the calculated drop point accuracy values are smaller than the set threshold values, not needing to adjust; if not, searching to-be-adjusted error coefficients according to the drop point deviation proportions, performing proportion adjustment, solving the drop point accuracy values and the drop point deviation proportions of the error coefficients after adjustment, and repeating the steps to finally acquire inertia measurement error coefficients meeting requirements of the drop point accuracy threshold values. Compared with other inertia measurement system accuracy index methods, the method has the advantages that automatic distribution of the accuracy indexes of the inertia measurement system and optimal adjustment of the error coefficients are achieved.

The invention discloses a flexural guided wave monitoring method applied to early warning the break of a tailings pond dam body. The method comprises the steps of 1, determining the position of a monitoring point along the span direction of a fill dam on the basis of fully analyzing existing engineering data and performing geological surveying and mapping; 2, drilling a hole at the position of the monitoring point and pre-embedding a waveguide rod array: 1, drilling the hole at the position of the monitoring point and pre-embedding a PVC pipe; 2, selecting a waveguide rod; 3, determining the number N of the waveguide rods; 4, placing the waveguide rods at the central position of the PVC pipe; and 5, plugging the opening with a rubber plug; 3, installing a flexural guided wave sensor; 4, building a signal collection base station; 5, collecting signals; and 6, analyzing and processing data. The flexural guided wave monitoring method applied to early warning the break of the tailings pond dam body provided by the invention has the advantages of low labor cost, all-weather automatic monitoring, simple and easy to operate and simple in data analysis, and has fewer error factors and relatively high detection accuracy.

The invention discloses a longitudinal guided wave monitoring method for tailings pond dam body brake early-warning. The method comprises the following steps: step one, determining a monitoring pointlocation along a fill dam span direction on the basis of sufficiently analyzing the existing engineering document and performing geological survey; step two, pre-embedding a waveguide rod array at a monitoring point location drill hole; 1) pre-embedding a PVC pipe at the monitoring point location drill hole; 2) selecting waveguide rods; 3) determining the root number N of the waveguide rod; 4) placing the waveguide rods at a center location of the PVC pipe; and 5) plugging an orifice by using a rubber plug; step three, mounting a longitudinal guided wave sensor; step four, establishing a signal collection base station; step five, collecting the signal; and step six, analyzing and processing the data. The longitudinal guided wave monitoring method for tailings pond dam body brake early-warning disclosed by the invention has the advantages of being low in labor cost, automatic in full-weather monitoring, simple and easy in operation, simple in data analysis, less in error element and high in detection precision.

The invention, which belongs to the field of the measurement machine of numerical control precision measurement equipment, especially relates to an articulated arm type measurement machine with an articulated arm structure. The measurement machine arranged symmetrically along a ZX plane comprises five steering knuckles capable of moving freely and independently and seven connecting arm segments. The five steering knuckles are in a dual-point support mode and support points of all knuckles except the knuckle 4 are arranged symmetrically along the ZX plane; and the knuckles 1 and 4 are infinite rotation knuckles. The measurement machine has comprehensive advantages of flexible operation, high structural rigidity, and light weight and the like.

The invention discloses a positioning system and a positioning method capable of being used indoors. The positioning system capable of being used indoors includes the following four parts of: a mobileterminal, an LBS base station, a WPS base station and a positioning service center. The mobile terminal and the LBS base station can communicate with each other. The LBS base station and the positioning service center can communicate with each other. The WPS base station and the LBS base station can communicate with each other. The mobile terminal is connected with the positioning service centerthrough the LBS base station. The WPS base station is connected with the positioning service center 104 through the LBS base station. Through employing the system of the invention, impacts caused by network jitters on precise positioning can be avoided, and precise indoor positioning is achieved.

The invention provides a metallographic analysis method for the gold detection. The metallographic analysis method for the gold detection comprises the following steps: flattening a metallographic sample through a flattening machine; observing the flattened metallographic sample through a metallographic microscope; opening image pickup and analysis systems of the metallographic microscope, and collecting an image having a representative view field; and performing the color contrast treatment on metallographic structures with different characteristics, measuring the percentage of the pixel amount of a gold matrix structure, a dissimilar metal structure and the like in the whole image number by using the image analysis system according to the gray difference of different color pixels, and judging the purity of gold. The metallographic analysis method has the advantages of large view field, easiness in operation, convenience in imaging, few error factors, high accuracy, high speed, low check cost and the like, and an intuitive and reliable analysis basis can be provided for detection on the purity of the gold.

The invention discloses an automated ramp device which comprises a frame (9), a ramp (2), a lifting mechanism (5), a lifting arm (7), a tube seat (4), an oil tube propelling mechanism (8), hydraulic arms (12) and a tube seat lifting hydraulic cylinder (14). The ramp consists of a horizontal section and an inclined section; the hydraulic arms (12) are respectively arranged at the two sides of the horizontal section of the ramp (2); hydraulic arm extension hydraulic cylinders (10) and hydraulic arm lifting hydraulic cylinders (11) are arranged on the hydraulic arms (12); the lifting mechanism (5) is arranged in the horizontal section of the ramp (2) and is connected with the lifting arm (7); the tube seat (4) is arranged on the lifting mechanism (5); a sliding rail (6) is arranged in the lifting mechanism (5); the oil tube propelling mechanism (8) is arranged on the sliding rail (6); and the tube seat lifting hydraulic cylinder (14) is arranged at one side of the bottom of the tube seat (4). The automated ramp device has the advantages that the automation of oil tube delivery and unloading in oil exploitation can be realized, and the oil tube delivery efficiency is improved.

The invention relates to a method for measuring the mass concentration of particulate matter. A processor controls a sampling pump to make airflow enter from a particulate matter collection unit, collects atmospheric particulate matter information, and determines whether an instrument needs to be calibrated. The parameter values ​​of the light scattering measurement module are calibrated, and after the parameter calibration is completed, the light scattering measurement module is turned on; if calibration is not required, the measurement is performed directly through the light scattering measurement module. The invention combines the measurement of particle concentration by the light scattering method with the β-ray method, and has both accurate measurement and online real-time direct reading data; the β-ray calibration module and the light scattering measurement module share a set of gas paths to ensure that various conditions are consistent in the calibration process. Reduce error factors; at the same time, when the measurement environment changes, use the β-ray calibration module to calibrate the parameters of the light scattering measurement module, and use the light scattering measurement module alone to measure the particle concentration when the measurement environment does not change.

The invention provides a method for measuring the lighting diameter of a small-aperture diaphragm and the rotating angle of a driving lever. According to the method, a mach-zehnder interference system and a dual-optical wedge movement micrometer system are used for measuring the dimension of an image of the small-aperture diaphragm, so that the non-contact measurement on the diameter of the small-aperture diaphragm can be realized. The probability of man-made misreading can be reduced at an observation screen by adopting reticle design.

The invention discloses a loading and unloading and positioning device suitable for a flexible robot loading and unloading production line. Pull the nail, set two ear plates with positioning holes, and fix the RFID code at the corner; the center of the cross arm of the U-shaped fork component is fixed with the robot flange component, and the two ends are fixed with the position sensor and the code reader. There is a positioning pin installation hole on the wall for fixing the positioning pin; the auxiliary workbench is fixed with a zero point positioning system at the position corresponding to the pull stud; when working, the positioning hole of the quick change tray is plugged into the positioning pin of the fork component; The pull stud is placed in the zero point positioning hole of the pull stud of the zero point positioning system, and the reverse taper surface at its upper end is clamped in the reverse taper hole of the zero point positioning system. The invention is used in a flexible production line for robot loading and unloading, can adapt to the diversity of workpieces, has high identification accuracy, good grasping reliability, and high zero point positioning accuracy.

The invention relates to the technical field of blast furnace detection, in particular to a blast furnace material level measuring device, which comprises a fastening unit, a support frame, a fixing unit, a measuring unit and a transmission unit, wherein the fastening unit and the fixing unit are arranged on the same straight line, the two ends of the support frame are respectively connected with the fastening unit and the fixing unit, one end of the measuring unit is movably connected with the support frame, the transmission unit passes through the fixing unit to be screwed with the fastening unit, and the transmission unit is also fixedly connected with the measuring unit. The blast furnace material level measuring device provided by the invention has the advantages that the structure is simple, and the angle does not need to be measured, so the introduced error factors are few, and the material level height and the material level descending speed obtained through calculation are very precise and reliable.

A method and an apparatus for measuring brake torque of an elevator are provided to accurately measure the torque of a brake of an elevator by uniformly maintaining the brake torque. An unbalance torque for rotating a driving pulley(18) by a weight difference between an elevator car(12) and a weight(22) is calculated based on the specifications of the elevator. A motor(26) is driven at a constant speed in a stat in which brake pads(30,32) of the elevator(10) make contact with a brake wheel(28). The output torque of the motor(26) is detected and a brake torque is calculated from the detected torque and the unbalance torque. The elevator(10) operates at a low speed. An apparatus for measuring the brake torque generated by the brake of the elevator(10) includes an unbalance torque acquisition unit for acquiring the unbalance torque.

The invention belongs to the field of oil and gas resource exploitation, and relates to a wellhead foam drainage gas production foam automatic detection device which comprises an automatic detection front end, a detection system part and a mechanical structure part. The automatic detection front end comprises a capacitance detection front end and an infrared detection front end, and the detection system takes an MCU as a core controller to realize acquisition, processing and transmission of a detection result; the mechanical structure part comprises a sealing lens, an infrared mounting head, an infrared sensor shell, an optical cavity, a processing system upper shell, a processing system lower shell, a detection front end upper shell, a detection front end lower shell, a detection capacitor, a capacitance sensor shell, a capacitor mounting head and a device shell. According to the device, the wellhead foam can be detected in real time, the accuracy and the real-time performance of detection are improved by adopting the capacitance detection front end and the infrared detection front end, the collected data are analyzed and processed by utilizing the micro-control system, the result is automatically transmitted to the mobile terminal, and the automatic control is completed.

The invention discloses a tennis court stainless steel continuous welding metal roof construction method, and relates to the technical field of building roof construction, and the method comprises the following steps: rechecking a steel skeleton support system, determining theoretical coordinates and elevation of an adapter on a steel skeleton structure through a BIM model, and performing actual measurement and checking; carrying out construction and retest of the adapter and the purline; constructing, mounting and retesting the profiled steel sheet layer; constructing and installing the leveling steel plate layer, the waterproof roll layer and the heat preservation and insulation layer; paying off and mounting the fixed support; carrying out temporary fixed installation, edge locking and welding treatment of the roof panel; according to the construction method, the theoretical coordinates and the actual coordinates obtained through the BIM model are rechecked, the machining lengths of the adapters and the purlins are parameterized and exported, the installation error in the construction process is reduced, the problems that in the traditional construction process, the paying-off positioning difficulty is large, and the construction efficiency is low are solved, and meanwhile the welding quality and the water leakage prevention performance after construction are improved.

The invention relates to an overall verification and measurement method for the measurement performance of a high-voltage electric energy metering device, which belongs to the field of measurement. It connects the high-voltage voltage / current generation unit, voltage / current adjustment unit, data comparison unit, control and data processing unit with the high-voltage electric energy standard metering unit and the measured high-voltage electric energy metering device; the high-voltage electric energy standard metering unit and the measured The high-voltage electric energy metering device respectively applies the sequence values ​​of primary voltage Un and primary current In to obtain a set of standard circuit electric energy value and measured electric energy value data; the above data are respectively sent to the data comparison unit for comparison, and the comparison results are sent to the control and a data processing unit; the required measurement error percentage γ is obtained according to the following formula: γ (%)=((the electric energy of the measured high-voltage electric energy metering device-the electric energy of the standard metering circuit) / the electric energy of the standard metering circuit)×100 ; The control and data processing unit converts the measurement results into identifiable information and outputs them, based on which the overall measurement performance of the measured high-voltage electric energy metering device is verified and measured. It is suitable for the field of verification and measurement of high-voltage electric energy metering devices.

The invention belongs to the field of soil detection, and particularly relates to a measuring method and measuring equipment for measuring unfrozen water content of frozen soil. The measuring method comprises the following steps: measuring the initial mass of a frozen soil sample; putting the frozen soil sample into a container through which the volume can be read, then injecting water into the container until the frozen soil sample is submerged to obtain a first soil-water mixture, and reading the volume of the first soil-water mixture; melting soil ice in the first soil-water mixture to obtain a second soil-water mixture, and reading the volume of the second soil-water mixture; in combination with the volume of the first soil-water mixture and the volume of the second soil-water mixture,calculating the volume of the soil ice in the frozen soil sample; in combination with the volume of the soil ice, deducing the mass of unfrozen water in the frozen soil sample. The measuring equipment comprises the container, wherein the container comprises a base and an upper end cover arranged at the top end of the base; the upper end cover is provided with scale lines. By the measuring method,the measuring cost is low, the operation is convenient and fast, the time and the labor are saved; the measuring equipment is simple in structure and low in manufacturing cost.

The invention discloses a high-speed wireless dynamic weighing sensor system. The system includes a weighing sensor, a power supply system, a Wheatstone bridge, an AD data collection card, a battery detector, a CPU, a temperature sensor, a control relay, a storage card and a power consumption control system. The power supply system is respectively and electrically connected with the Wheatstone bridge and the battery detector. The Wheatstone bridge is electrically connected with the AD data collection card. The weighing sensor is electrically connected with the AD data collection card. The battery detector is electrically connected with the CPU. The weighing sensor in the system of the invention has only one externally connected antenna, on-site installation and construction are enabled tobe more convenient, human error factors are reduced, construction costs are reduced, the weighing sensor system uses almost no wire joint on 32 sensors as compared with wired sensors, costs are greatly reduced, too much invalid data collection and transmission can be avoided through the power consumption control system, and system running efficiency is improved.

The invention discloses a fixing and clamping tool for mechanical raw material cutting, and relates to the technical field of machining. The fixing and clamping tool for mechanical raw material cutting solves the problems that errors are likely to occur in the mechanical raw material cutting process, which goes against the improvement of the production efficiency, a large number of waste chips re generated in the cutting process, and the workload of workers is increased. The fixing and clamping tool for mechanical raw material cutting comprises a base. Sliding blocks are arranged at the top of a first sliding rod in a sliding manner. Sliding seats are fixedly arranged on the inner side of each fixing disc in an annular array shape. A mounting frame is fixedly arranged at the top of the base through bolts. A fixing plate is fixedly arranged at the top of the mounting frame through bolts. By arranging the base, the sliding blocks and the sliding seats, the stability of raw materials in the cutting process and the accuracy of finished products can be further enhanced, and the production efficiency is improved; and through the arrangement of the mounting frame and the fixing plate, the top of the base can be cleaned in the cutting process, and the workload of workers is lightened.