231results about How to "Reduce measurement error" patented technology

The invention relates to the technical field of collection equipment, in particular to a sample collection device for diesel engine gas detection. A first pipe opening, a second pipe opening and a third pipe opening are formed in the pipe body; a collecting barrel is installed in the first pipe opening, a limiting mechanism used for being connected with a flue of a diesel engine is installed on the second pipe opening, a flow monitoring mechanism is installed on the third pipe opening, and the particulate matter collecting barrel, the flow monitoring mechanism and the flue connecting mechanism are integrated on one pipe body, so that particulate matter collection and gas flow measurement are synchronously carried out; measurement errors caused by fluctuation of working conditions are greatly reduced, and the accuracy and reliability of detection data are improved.

This invention discloses a downconversion fluorescence thermometry method based on bilinear mode, implemented using a hardware system. The hardware system includes a 280nm light-emitting diode, two convex lenses, and a Tb... 3+ :Cs2Na 0.9 Ag 0.1 The system comprises InCl6 temperature-sensing material, a grating spectrometer, an oscilloscope, a signal generator, a computer, and a thermostat. The specific implementation steps are: signal excitation and acquisition; temperature calibration; actual temperature measurement; and high measurement accuracy: VPR mode linear correlation coefficient R² ≥ 0.998, FL mode linear correlation coefficient R² ≥ 0.992, avoiding measurement errors introduced by the exponential bias or correction term of traditional FIR technology, thus fundamentally improving temperature measurement accuracy.

The application discloses a downhole multi-parameter logging device and belongs to the technical field of logging while drilling, comprising a drill collar, a battery module and a circuit module are respectively arranged at the two ends of the inner cavity of the drill collar and are axially fixed through locking modules, a metal centralizer is fixedly arranged in the inner cavity of the drill collar, a plurality of independent centralizing blocks are arranged at the center of the metal centralizer, the drill collar comprises a drill collar body, an antenna housing, a strip-shaped magnetic core and a coil, and stable signal transmission is guaranteed, the battery module comprises annular batteries and butterfly springs, can be replaced on site and has a damping function, the circuit module comprises resistivity, azimuth gamma and inclination measurement modules, is integrally designed and has strong anti-interference performance, the metal centralizer realizes self-adaptive centralizing through centrifugal force and hydraulic damping, and the independent centralizing blocks can compensate temperature errors, the device is stable in structure, is suitable for complex well conditions, is convenient to maintain and can realize accurate and synchronous measurement of multiple parameters, thereby providing reliable data support for logging while drilling.

The application provides a target positioning method based on multi-station long-time passive angle measurement, which is applied to an information collection node and comprises the following steps: obtaining angle information of a target collected by a passive sensor in a preset time period, and a sampling position and a sampling time of the passive sensor; estimating a first sampling position and a first motion speed corresponding to the passive sensor at a first time according to the sampling position and the sampling time of the passive sensor; estimating first angle information of the target corresponding to the passive sensor at the first time according to the angle information of the target collected by the passive sensor and the sampling time; and sending the first sampling position, the first motion speed and the first angle information corresponding to the passive sensor to an information fusion center, so that the information fusion center estimates the position and the speed of the target at the first time according to the first sampling position, the first motion speed and the first angle information corresponding to the passive sensor, and the communication amount can be reduced and the positioning precision can be improved.

The invention discloses a high-speed heavy-load working condition bearing dynamic stiffness testing device and testing method, and relates to the field of bearing testing. The invention solves the problems that the existing bearing dynamic stiffness test technology and equipment only can load in a single direction, cannot simulate axial and radial composite loading, depends on contact transmission, is insufficient in heavy load bearing, lacks system vibration error suppression measures, and is poor in reliability. And the high-precision test requirement of the independent rolling bearing under the high-speed heavy-load composite working condition is difficult to meet. A shafting supporting module is arranged on the upper portion of a test bench support, a measuring module is located over the shafting supporting module, an axial loading module and a radial loading module apply axial force and radial force to a tested bearing respectively, and a driving module drives a supporting shaft and an inner ring of the tested bearing to rotate. Axial and radial composite loading under the high-speed heavy-load working condition can be achieved, axial and radial displacement can be monitored synchronously, system errors are reduced, and high-precision measurement of the dynamic stiffness of the bearing is achieved.

The utility model discloses a convenient to wash's veterinary medicine mixing machine for livestock and poultry, including support column, pre -crushing mechanism, pre -mixing mechanism and cleaning mechanism, the support column upper end surface is equipped with mixing barrel, the mixing barrel upper end surface is equipped with the barrel cover, the barrel cover upper end surface is equipped with first motor, and the first motor output is connected with the main shaft, and the main shaft surface is equipped with a plurality of stirring rods, and the cleaning mechanism includes pull rod, round brush and limit component, the pull rod is connected with the barrel cover slidingly, the pull rod lower end surface is connected with the round brush, the round brush is opposite with the mixing barrel inner side wall, the pre -mixing mechanism includes mixing medicine cylinder, dosing cylinder, first valve and second valve, the mixing medicine cylinder is located on the barrel cover upper end surface, the mixing medicine cylinder upper end surface is equipped with two sets of dosing cylinder, the dosing cylinder barrel cover first valve control, and the mixing medicine cylinder passes through second valve control. This mixing machine is convenient to wash, and simultaneously improves the homogeneity and accuracy of final drug solution concentration.

The utility model provides a device for detecting template verticality, which comprises a supporting piece, a sliding piece and a measuring piece, the supporting piece is arranged on one side of a template to be detected, the sliding piece is arranged on the supporting piece and can move up and down along the supporting piece, the measuring piece is arranged on the sliding piece and can move up and down along the supporting piece, and the measuring piece is arranged on the sliding piece and can move up and down along the supporting piece. The horizontal distance measuring device is used for measuring the horizontal distance between the different heights of the supporting piece and the to-be-measured template. The vertical template verticality detection device has the advantages that an operator can detect the verticality of a vertical template without climbing, the operation is convenient, the measurement time is shortened, the working efficiency is improved, the potential safety hazard is reduced, multi-point measurement is carried out by adopting the range finder, the measurement error is reduced, the verticality detection precision of the vertical template is ensured, and the working efficiency is improved. And the construction quality is improved.

The invention discloses an S-type pitot tube calibration coefficient prediction method based on CFD, and the method is realized through the following steps: S1, carrying out CFD numerical simulation based on parametric modeling, and obtaining a calibration coefficient set of an S-type pitot tube under different installation angle deviations, flow velocity range conditions and environmental parameters; s2, integrating simulation data, and constructing a feature vector data set of the key influence parameters; s3, dividing the data set into a training set and a test set; s3, based on an RBF algorithm, constructing a high-precision nonlinear prediction model by using the training set; and S4, verifying the performance of the model by using the test set, and judging whether the prediction accuracy meets the expectation or not. A CFD simulation technology and a machine learning algorithm are integrated, the problem that a traditional real flow calibration device is limited in capacity and cannot reproduce on-site complex conditions is solved, and a solution is provided for high-precision prediction and correction of calibration coefficients under on-site complex installation conditions and a non-uniform flow field.

The utility model relates to water quality detection technical field discloses a pH electrode protection device for water quality detection, including water pipe, protection shell and baffle, water pipe includes electrode connection pipe department, water inlet pipe department and water outlet pipe department of integral intercommunication, electrode connection pipe department is used for supplying the measurement part of pH electrode to penetrate, water inlet pipe department and water outlet pipe department are all used for connecting pipeline, and the filter screen is equipped in water inlet pipe department, is used for filtering the big granular object in the water body of measurement, protection shell is detachably established on electrode connection pipe department, and the positioning groove is equipped in protection shell, is used for accommodating and positioning the main part of pH electrode, the baffle is fixedly established on protection shell, and is located between water inlet pipe department and the measurement part of pH electrode, and the baffle is uniformly equipped with a plurality of water passing holes, and the water passing hole is used for filtering the small granular object in the water body of measurement, the utility model can solve how to reduce the problem of the friction, scouring and impact effect of high -speed water flow and granular object in pipeline to pH electrode, and protect pH electrode.

This disclosure discloses a measuring device and method for selecting the top side clearance of a gear coupling. The device includes: a first positioning member having a tapered positioning surface whose dimensions match the axial hole of the drum-shaped tooth; a second positioning member having a rotary positioning pin, a circumferential positioning surface, a radial moving groove, and an inner gear sleeve tooth groove positioning pin, wherein the rotary positioning pin is clearance-fitted with the first and third positioning members, the dimensions of the circumferential positioning surface match the radial inner surface of the inner gear sleeve for positioning, and the inner gear sleeve tooth groove positioning pin positions the inner gear sleeve tooth groove along the extension direction of the radial moving groove; the third positioning member has a radially moving stepped surface and can move relative to the second positioning member; and a measuring member fixed relative to the second positioning member, wherein the measuring part can be aligned with the first positioning member along the rotation direction of the first positioning member and the drum-shaped tooth relative to the second positioning member, and the measuring part can be aligned with the first positioning member along the radial moving direction of the first positioning member and the drum-shaped tooth relative to the second positioning member.

The utility model provides an oil-resistant high-precision embedded thermal resistor, which belongs to the technical field of embedded thermal resistors, and comprises a reference end and a measuring end, the measuring end comprises a pipe sleeve head and two resistor elements arranged in the pipe sleeve head, the upper part of the pipe sleeve head is welded with an armored lead wire through laser, and the armored lead wire is connected with the reference end and the measuring end. The armored lead is sleeved with a silica gel heat shrink tube or a polytetrafluoroethylene tube, and a shielding lead is arranged between the armored lead and the reference end. According to the embedded thermal resistor, double resistor elements are adopted, so that the redundancy of a product is increased, cross validation can be realized, the measurement error is reduced, meanwhile, the lead directly connected with the measurement end is an armored lead, and a silica gel heat shrink tube or a polytetrafluoroethylene tube is sleeved on the lead, so that the oil resistance of the embedded thermal resistor is greatly improved, and the service life of the embedded thermal resistor is prolonged. In addition, environmental interference can be inhibited, thermal stability can be maintained, the service life can be prolonged, and the effective precision under actual working conditions is remarkably improved, especially in high-electromagnetic-interference, severe-temperature-change or corrosive environments.

The invention aims at providing surveying equipment for hydrogeological survey, and relates to the technical field of measuring equipment, the surveying equipment comprises an electrode bar assembly, the electrode bar assembly comprises a pole, a pole cap and a drilling rod, and the electrode bar assembly is used for being connected with soil and measuring the resistivity of the soil; the driving assembly comprises a battery pack, a threaded sleeve, a shaft sleeve and a motor and is used for driving the electrode bar assembly to insert underground; the compaction assembly comprises a pressing rod, a first pressing plate and a second pressing plate, and it can be guaranteed that soil is attached to the electrode bar assembly. And the straightening assembly comprises a third mounting plate, a laser range finder, a measuring plate, a lens and a developing plate, plays an auxiliary role in insertion of the electrode bar assembly, ensures that the electrode bar assembly is linearly distributed, and solves the problems that the measurement position is deviated and the accuracy and the reliability of measurement data are influenced due to the fact that the electrode bar is easily inclined when being manually inserted in the prior art.

The application discloses a small shield machine pose detection device and method in curved pipe curtain construction, a one-dimensional workbench is initially at the highest point of a guide rail through the gravity of a heavy hammer, the guide rail is vertically installed on a jacking mechanism rack, and a long grating displacement sensor measures the vertical displacement coordinates of the one-dimensional workbench in real time. In the construction process, a cross joint measurement module passes through a pipe joint, a convex flange one end is connected with a concave flange at the tail of the shield machine, the concave flange one end is connected with a convex flange at the bottom of the one-dimensional workbench, two circular grating angle sensors and a circular grating reading head are arranged on the cross joint, the rotation angle measurement of two mutually perpendicular axes of the cross joint is realized, a Bluetooth wireless transmission module reads the rotation angles of each joint at the same time, and the rotation angles are transmitted to a computer, the computer collects each data every moment, the position coordinates of the top end of the shield machine relative to a reference coordinate system are obtained through calculation, and the pose of the shield machine is detected in real time.

The application relates to the technical field of photovoltaic structure production, and discloses a workpiece testing fixture used for detecting the size precision of a connecting hole of a workpiece, which comprises a testing fixture body and at least one detection part. At least part of the profile of the testing fixture body is matched with the outer profile or the inner profile of the workpiece, and the testing fixture body is positioned in close contact with the workpiece during the detection process; the detection part comprises a through hole structure and a plug rod; the through hole structure is arranged on the testing fixture body; the plug rod is arranged through the through hole structure and is used for penetrating the connecting hole; the hole diameter size error or the position deviation of the connecting hole is quickly reflected through the positioning cooperation between the testing fixture body and the workpiece and the plug-in state between the plug rod and the connecting hole. In the utility model, the workpiece testing fixture has the advantages of simple structure, reliable positioning, convenient detection operation, the detection error caused by detection methods or detection postures and the like in the manual detection process can be effectively reduced, and the accuracy and consistency of the workpiece connecting hole detection are improved.

The application provides a three-way stress monitoring device and method based on an eddy current sensor, six eddy current sensors are uniformly distributed in a metal support circular pipe, the load stress of coal and rock bodies in three different directions can be measured, and thus the problem that a traditional monitoring device can only measure the load stress in the vertical direction of the coal and rock bodies is solved. The data accuracy is improved, the measurement data are enriched, and the change of the load stress of the coal and rock bodies in each direction can be better monitored; the sensor and the oil bag are integrated, and the sensor can directly measure the load stress of the coal and rock bodies at the corresponding position of the drill hole. Compared with the split structure of the traditional monitoring device, the sensor is less affected, the measurement error is smaller, and the measurement result is more accurate.

This utility model provides a precise metering and ingredient optimization device for condiment production, including a storage bin with a support frame fixedly connected to its lower end. A motor is fixedly installed on one side of the support frame, and a dispensing roller is fixedly connected to the motor output end. Several metering grooves are opened on one side of the dispensing roller. The dispensing roller is rotatably connected to the lower end of the storage bin, and a cleaning component is provided at the lower end of the storage bin. This utility model connects an extrusion block to the dispensing roller. While the dispensing roller rotates, it drives the extrusion block to briefly extrude the wedge block, causing it to generate a slight impact on the dispensing roller under the restoring force of the return spring. This eliminates the material adsorption phenomenon caused by surface tension in the metering groove, reduces metering errors, requires no additional power source, improves dispensing accuracy, reduces equipment maintenance costs, and meets the precise metering needs of multi-component raw materials in condiment production.

The utility model discloses an adjustable surveying and mapping instrument windproof support belongs to surveying and mapping instrument support field, and it includes adjustable support, support sleeve and reinforcing link: adjustable support contains main rod, the inner rod of the upper and lower slide of main rod, and the thread locking mechanism of locking inner rod height, and the inner rod upper portion fixed surveying and mapping instrument body, support sleeve upper end connects main rod, and the outer surface ring of lower extreme is clothed three collapsible legs, and the inside slide slide bar, and the telescopic link of slide bar inside slide is arranged, and the support block is fixed to telescopic link bottom end, reinforcing link is set up to corresponding leg, and two ends are rotatable connection collapsible leg and slide bar respectively, and the leg is set up to corresponding and has the accommodation groove. When the leg is folded, reinforcing link is received into the accommodation groove, when the leg is opened, reinforcing link and slide bar, leg constitute the triangle stable structure. The utility model can effectively promote the whole wind bearing capacity, keep stable observation, reduce the measurement error caused by vibration.

The utility model relates to rustproof steel elevator door pocket detection technical field, and disclose a kind of size detection calibration tool for stainless steel elevator door pocket production, including drum conveyor, the top of drum conveyor is provided with measuring mechanism, one end of measuring mechanism is provided with dismounting mechanism, measuring mechanism includes measuring frame, the inside slide of measuring frame is connected with sliding block, one end of sliding block is fixedly connected with first air cylinder, the other end is fixedly connected with first measuring plate, the inside fixed connection of measuring frame has return spring, one end of return spring is fixedly connected with second measuring plate, the bottom fixed connection of second measuring plate has mounting seat, this size detection calibration tool for stainless steel elevator door pocket production, three size synchronous detection are realized by measuring mechanism, effectively reduce the tedious operation of multiple adjustment measurement position, reduce the measurement error caused by artificial intervention, reach the effect of improving detection efficiency and detection accuracy.

The utility model discloses a support for a toy combustion test device and the toy combustion test device, and belongs to the technical field of toy detection equipment. In a toy combustion test, the position and the angle of a toy to be tested are difficult to flexibly and accurately adjust by the existing bracket, and the existing bracket and the existing clamp only can clamp in parallel due to various sizes and shapes of plush toys, so that the multi-angle combustion test requirement cannot be met. The support comprises a mounting base plate, a Y-axis guide rail, a Z-axis guide rail, a horizontal supporting assembly, an oblique angle supporting assembly and the like. The Y-axis guide rail and the Z-axis guide rail can achieve sliding of the sliding block and are matched with the lead screw and the driving motor to conduct accurate position adjustment. The horizontal supporting assembly and the oblique angle supporting assembly are provided with linear guide rails and clamps, and the clamping requirements of toys with different sizes and special shapes can be met. The test device comprises a test box body, a smoke exhaust channel, a combustion spray gun, a bracket and the like, is mainly used for a toy combustion test, and provides stable and flexible support and a good test environment for the test.

The application discloses a kind of pipeline gas flow rate measurement methods, comprising the following steps: S1, thermistor is installed in the preset pipeline where gas flow rate and temperature can be adjusted;S2, flow rate curve fitting: S3, the gas flow rate of the preset pipeline is kept at a constant reference value V0, change preset pipeline temperature t1, collect the voltage value u2 of the thermistor both ends under different pipeline temperature t1;S4, calculate the thermistor voltage error value S5, temperature curve fitting;S6, the thermistor is installed in the pipeline to be measured, the temperature t k Of the pipeline to be measured is measured, and the voltage value u k Of the thermistor both ends is measured;S7, calculate the thermistor voltage correction value u c =u k -Δy'; S8, the thermistor voltage correction value u c Substitute the flow rate curve, obtain the gas flow rate v c Of the pipeline to be measured.The application reduces the influence of environmental temperature change on pipeline gas flow rate, reduces the measurement error, greatly improves the accuracy of measuring gas flow rate.

The utility model discloses a kind of fluorescent electronic quality control card and quality control card system, fluorescent electronic quality control card includes attenuating sheet and light source, the light source is arranged towards the attenuating sheet, the attenuating sheet can make the light intensity of light passing through the attenuating sheet fixed proportion attenuation.Quality control card system includes multiple fluorescent electronic quality control cards, the light source of each fluorescent electronic quality control card is same, the optical density of the attenuating sheet of each fluorescent electronic quality control card is different from each other.Compared with prior art, quality control card system provided by the utility model emits same light by same light source, after attenuation by different attenuating sheets, different fixed light intensity signals are formed respectively, cover the detection range of dry immunization analyzer, can be used for the accurate calibration of equipment, reduce the measurement error between different equipment, improve the stability and reliability of detection result.

The utility model relates to a kind of soil detection devices, belong to soil detection technical field, specifically a kind of soil detection device for road construction, including soil detector, further include;Probe, the probe is fixedly installed at the bottom of soil detector;Fixed plate, the fixed plate is fixedly installed on probe;The utility model reaches the effect of avoiding probe to stab staff, reduces the security risk, solves the recess of the side of the existing sampling cylinder possibly leads to soil blockage, especially the cohesive soil is attached in recess, affects sample integrity and subsequent cleaning, and the end of probe is designed into conical, relatively sharp, easy to cause worker to be stabbed when using, there is the problem of security risk.

The utility model relates to municipal works pipe jacking construction technology field discloses a kind of folding linear pipe jacking line shape measuring devices, including clamping mechanism, folding ruler, adjustable target and the telescopic fixing mechanism for locking the included angle between clamping mechanism and folding ruler;The clamping mechanism is used to clamp the measuring device in the end of pipe wall two sides of construction pipe jacking;Folding ruler one end articulates clamping mechanism;Folding ruler is provided with recess along length direction, and folding ruler is divided into several short rulers, and short ruler is connected with hinge;Laser source and reflector are provided on the adjustable target, and adjustable target is embedded recess to form sliding connection;The telescopic fixing mechanism includes telescopic link and first fixed bolt.The utility model integrates clamping, extension, measurement, target and locking function in one, adapt to the narrow space limit of construction;The short ruler design of folding ruler meets different pipe diameter measurement demand;Telescopic link adjusts included angle, ensures that folding ruler is perpendicular to pipeline axis, reduces inclination error.

This utility model discloses a dual-mode hydrological radar measurement device based on closed-loop attitude adjustment, belonging to the field of hydrological monitoring technology. It includes a sealed electronic cabin and an attitude adjustment mechanism. A pitch angle adjustment component is located between a bottom fixed base and a rotating base, used to drive the bottom fixed base to pitch and swing horizontally. An azimuth angle adjustment component is connected between the rotating base and the top fixed base, used to drive the rotating base to rotate horizontally vertically. Through a periodic task scheduling mechanism and pre-emptive closed-loop attitude adjustment, it can automatically and cyclically switch between water level measurement mode and flow velocity measurement mode under unattended conditions. Before each measurement, the radar beam is precisely adjusted to the optimal incident angle of the corresponding mode. Simultaneously, the "attitude adjustment first, measurement later" execution logic ensures that each data acquisition is performed under optimal physical conditions, fundamentally improving the measurement accuracy of water level and flow velocity parameters and realizing fully automated continuous hydrological monitoring.

The utility model discloses a kind of DC / DC power supply test systems, it is related to power supply test field, for improving the test efficiency of double input, multiple output DC / DC power supply.Test system includes first DC power supply, second DC power supply, multichannel load, conversion component, detector and industrial computer;Industrial computer is connected load, first DC power supply, second DC power supply, conversion component and detector respectively;Conversion component is connected or disconnected DC / DC power supply with each road load;Conversion component is provided with first switch component between DC / DC power supply and first DC power supply and second DC power supply;Detector detects the working parameter of DC / DC power supply under enabling state.Working parameter is obtained from detector to analyze test index by industrial computer control conversion component forward or reverse intercommunication DC / DC power supply and first DC power supply or second DC power supply, complete test.Test system can improve test efficiency and accuracy after working.

The utility model discloses building template flatness detection equipment which comprises a bottom plate and a caliper support assembly, a plane building template frame is installed on the top of the bottom plate through bolts, a laser level meter is placed on the top of the bottom plate, the caliper support assembly comprises a bearing stand column, a movable column and a horizontal moving mechanism, and two electric push rods are arranged on the two sides of the bearing stand column. The top ends of the two electric push rods are fixedly installed on the lower surfaces of the two sides of the top end of the movable column, the outer surface of the bottom end of the movable column is slidably installed on the inner surface of the middle of the bearing stand column, and the surface of the horizontal moving mechanism is fixedly installed on the upper surface of the movable column. When the flatness of the plane building template frame is detected, the surface of the top end of the measuring caliper is attached to the bottom surface of the plane building template frame by arranging the caliper support assembly, and position data are recorded, so that stability and attachment are kept in the measuring process, the measuring error is reduced, and the flatness detection precision is improved.

This application discloses a positioning method, apparatus, terminal, and communication device, belonging to the field of communication technology. The positioning method of this application includes: a first terminal measuring a physical secondary link (SL) positioning reference signal sent by a second terminal; the first terminal sending first information to a target communication device based on the measurement of the SL positioning reference signal; wherein, the first information includes at least one of the following: line-of-sight (LOS) indication information; measurement information of the SL positioning reference signal; location-related information; the target communication device is the second terminal, a preset terminal, a base station device, or a core network device.

The application discloses a radar detection blind area wind field fine reconstruction method of anemometer cooperative networking, and specific steps are as follows: firstly, real-time separation of vibration displacement caused wind speed measurement deviation eliminates vibration interference, data automatic diagnosis and repair are carried out based on machine learning, and wind speed data integrity and measurement continuity are optimized; secondly, a supersonic anemometer array optimization arrangement method facing global wind field perception is established, time and space consistency calibration of multi-sensor data is realized, and the precision and reliability of wind speed measurement are improved; finally, data-physical fusion bridge flow field high-resolution intelligent reconstruction is carried out, and the data integrity of a complex flow field region is improved. The reconstruction method effectively cooperates the wind measurement laser radar and the anemometer, can play the advantages of high-frequency single-point measurement and wide-area space scanning of the two, and is expected to realize high-precision reconstruction of the global flow field of the bridge, and provide reliable support for guaranteeing the wind resistance safety of the long-span bridge.