39results about How to "Resolving inaccurate measurements" patented technology

The invention discloses a measuring device for measuring the height of trees in a garden by using an unmanned aerial vehicle. The present invention adopts an unmanned aerial vehicle measuring device with an image recognition algorithm added by an aerial camera and a recognizer. When in use, the recognition device and the internal program algorithm of the recognizer are used to quickly obtain the difference between the tree structure and the color of the external space. , after identification, the highest position in the image is obtained, and after being suspended at this position, the vertical height information of the tree is obtained by using the range finder combined with the information obtained by the height identification module inside the UAV, which effectively solves the existing problem. When measuring the height of trees, the measurement results are inaccurate by using tree shadow comparison, head-up auxiliary measurement and triangulation method, etc. The problem is that the structure is simple, the adaptability is high, and the measurement process is simple and fast.

The invention relates to a measuring circuit, in particular to an aluminum electrolytic cell series ground insulation intensity measuring circuit which comprises an electrolytic cell and an interbus used for connecting the electrolytic cell. A voltage controlled power source is arranged between the electrolytic cell and the ground, a milliampere ampere meter is connected between the voltage controlled power source and the ground in series, a microampere ampere meter is connected between the milliampere ampere meter and the ground in series, and a voltmeter is connected between an adjustable end of the voltage controlled power source and the microampere ampere meter in parallel. The aluminum electrolytic cell series ground insulation intensity measuring circuit has the advantages that voltage is exerted between an electrolysis series and ground zero potential, detecting to voltage and a leakage current is conducted simultaneously, insulating intensity is calculated according to size and changing circumstances of ratio of the voltage and the leakage current, and accurate electrolytic series ground insulation intensity values are reached. The problem that measuring results are inaccurate caused by insufficient capacity of an insulating megger is solved effectively. The measuring circuit, in particular to an aluminum electrolytic cell series ground insulation intensity measuring circuit is close to actual circumstances after the electrolytic series is put in use, and therefore estimation to insulating intensity is effective.

The invention relates to a motor bearing, in particular to a motor bearing random dynamic load, and specifically relates to a motor bearing random dynamic load testing device and a testing method. In order to solve the problem that a random dynamic load test device and a test method of a motor bearing in the prior art are easy to cause inaccurate random dynamic load test of the motor bearing, the invention provides a novel random dynamic load test device of the motor bearing, which comprises a bearing bush provided with four positioning holes and an adjusting through hole, a dynamometer fixing assembly is arranged in each positioning hole; a dynamometer adjusting assembly is arranged in each adjusting through hole and comprises an adjusting block, the adjusting block is located between the upper end face of the piezoelectric dynamometer and the side wall of the upper portion of the adjusting through hole, and the face, making contact with the adjusting through hole, of the adjusting block is an inclined face. According to the testing device, the piezoelectric dynamometer can be in direct contact with the outer ring of the motor bearing, and the pretightening force can be adjusted through the inclined surface on the adjusting block, so that the testing result is more accurate.

The invention provides a near-infrared analysis system and method for a solid material. The near-infrared analysis system comprises a near-infrared analysis instrument, smashing equipment, temperaturecontrol equipment, stirring equipment, a first valve, a detection chamber and a second valve, wherein the smashing equipment is used for smashing the solid material, and conveying the solid materialto the stirring equipment; the temperature control equipment is used for temperature T in the smashing equipment to prevent moisture from condensing; the stirring equipment is used for mixing a powdery material conveyed by the smashing equipment; the first valve is arranged at the outlet of the stirring equipment; the detection chamber is used for containing the powdery material conveyed by the stirring equipment, and the near-infrared analysis instrument is used for detecting parameters of the powdery material in the detection chamber; the parameters comprise dry basis protein B1; the secondvalve is arranged at the outlet of the detection chamber. The near-infrared analysis system has the advantages of accurate detection and the like.

The invention provides a test sample clamping device for a wettability experiment. The problem of an inaccurate measuring result caused by a relatively big error between a preset dipping angle and an actual dipping angle of a to-be-tested sample in the prior art is solved. The test sample clamping device for the wettability experiment comprises a hanging rod; a clamp for clamping the to-be-tested sample is arranged at the lower end of the hanging rod; a mark for cooperating with an angle disk to measure the dipping angle of the to-be-tested sample is arranged on the hanging rod; an angle control instrument for driving the hanging rod to swing to change the dipping angle of the to-be-tested angle is arranged on the hanging rod; the angle control instrument comprises a movable counter weight arranged on the hanging rod; and the moving direction of the counter weight is perpendicular to the swinging axis of the hanging rod. The clamping device is in a naturally droop state after clamping the test sample, the dipping angle is not changed and an inaccurate measuring result is not caused.

The invention relates to a kind of molten iron liquid level detecting method and of the blast furnace torpedo tank car and the device. On the upper surface of the molten iron container of the tank car creates a tank base surface. On the blast furnace taphole of the torpedo tank car installs a distance measuring sensor which can move on the base orbit. It is controlled by the controller, the sensor moves between the upper locations of the molten iron tank mouth and the tank base surface. It can measure the distance between the sensor and the tank base surface and the distance between the sensor and the molten iron liquid level. The calculating method of the molten iron liquid level in the tank is as follows. The height between the sensor and the tank base surface adds the height between the tank base surface and the tank bottom, detracts the height between the sensor and the molten iron liquid level in the tank and obtains the real height of the molten iron liquid level. The detecting method of the invention is exact; the detecting device is simple; the operation is convenient.

The invention provides a chip voltage drop measuring device and method. The device for measuring the chip voltage drop provided by the present invention includes: a voltage-controlled oscillator, an inverter delay chain, and a data processing module arranged in the chip; the voltage-controlled oscillator is used to generate a clock signal, and when the chip voltage drop changes, The frequency of the clock signal generated by the voltage-controlled oscillator changes with the voltage drop of the chip; the inverter delay chain is connected with the voltage-controlled oscillator to measure the clock signal generated by the voltage-controlled oscillator when the chip is in different working states The frequency; the data processing module is connected with the inverter delay chain, and is used to obtain the frequency of the clock signal generated by the voltage-controlled oscillator when the chip is in different working states according to the measurement of the inverter delay chain, and obtain the voltage drop of the chip amount of change. The invention solves the problem of inaccurate measurement results of the chip voltage drop due to the uncertain time window of the input clock signal when measuring the chip voltage drop in the prior art.

The invention discloses a meter coefficient self-correcting method of a gas turbine flowmeter. An electromagnetic coil is embedded into a flowmeter shell, a fixed detection force is applied to equivalently simulate the axial impact force of fluid on turbine blades according to a set interval time, frequency variation corresponding to the detection force is calculated according to the frequency measured by a flow detector, and a new meter coefficient is calculated by using the relationship between flow and the frequency variation, thus calculating a flow measuring value according to the updated meter coefficient. The method solves the problem of inaccurate measurement results due to meter coefficient drifting caused by scaling, corrosion, abrasion, physical property change of fluid medium and the like. With the on-line self-diagnosis function, the method improves the measurement accuracy of the gas turbine flowmeter, avoids the inconvenience in detachment, calibration and the like of the flowmeter at regular intervals, prolongs the service life of the flowmeter, broadens the application area of the flowmeter and enables the flowmeter to be still normally available in a situation that cleanness of detected gas is lower.

The invention discloses an ultrasonic flowmeter with a frequency drift correction function and a correction method thereof, and belongs to the field of ultrasonic flowmeters. The ultrasonic flowmeter comprises an upstream transducer, a downstream transducer, a signal change-over switch, a low noise amplifier, a bandpass filter, a variable gain amplifier, a microcontroller, a temperature sensor and an excitation signal buffer; the upstream transducer and the downstream transducer are separately connected with the signal change-over switch, and the signal change-over switch is separately connected with the low noise controller and the excitation signal buffer; the low noise amplifier is connected with the bandpass filter, the bandpass filter is connected with the variable gain amplifier, and the variable gain controller is connected with the microcontroller; the microcontroller is connected with the excitation signal buffer and the temperature sensor. The problem that the existing ultrasonic flowmeter is inaccurate in measurement result due to the resonant frequency drift of the transducers is solved; and the effects of improving the measurement accuracy of the time difference of the ultrasonic flowmeter and improving the measurement accuracy of the ultrasonic flowmeter are achieved.

The invention discloses a high-precision short coherent light three-dimensional morphology rapid measuring algorithm. The high-precision short coherent light three-dimensional morphology rapid measuring algorithm comprises the steps that firstly piezoelectric ceramics are driven to perform time sequence perpendicular scanning according to pi / 2 phase position stepping quantities within a certain scanning length, and an interference pattern is stored according to each corresponding stepping quantity; the interference patterns are calculated and processed and blended into the process of time sequence perpendicular scanning interference pattern storing to realize rapid measuring; the interference patterns are recorded complete while time sequence perpendicular scanning is carried out, contractratio solution of various pixel point phase shift scanning refined phase and the multiple interference patterns in airspace is completed. The contract ratio of the multiple interference patterns areprocessed to obtain a perpendicular scanning coarse phase; then, the phase shift scanning refined phase is fused with the perpendicular scanning coarse phase to obtain a three-dimensional morphology measuring result; and finally, batwing errors of a sample to be measure generated at edges of step morphology are judged and removed by adopting a two-dimension discrete difference algorithm to obtaina high-precision three-dimensional morphology measuring result. The high-precision short coherent light three-dimensional morphology rapid measuring algorithm is simple, the speed is high, the precision and confidence level is high, and environmental noise resistance capacity is high.

The invention provides a method for measuring the weight of a dynamic vehicle and a dynamic vehicle measuring system. The method comprises the following steps: constructing an equation set which includes a plurality of linear fitting equations which correspond to different vehicle velocities in a one by one manner; acquiring the average velocity of a certain vehicle when the vehicle passing a certain sloped distance and force generated in the horizontal direction and the vertical direction, and calculating a converged force; acquiring from a equation set a linear fitting equation which corresponds to the average velocity of the vehicle and is intended for representing the linear relationship between weight and the joint force, and calculating the weight of the vehicle based on the joint force. The system includes a slope bearing bench, a sensing support, a measuring apparatus, a memory and a processor. According to the invention, the method addresses the measuring inaccuracy caused by discontinuous contact between tires and the slope bearing bench when the vehicle runs at high velocity, and can cater to the requirements of accurate measurement of the vehicle.

The invention provides an interface level meter and an interface level measuring method. The interface level meter is used for measuring the interface level of mixed liquid and comprises a conduit, an ultrasonic wave transceiver and a floater. The ultrasonic wave transceiver is fixedly arranged in the conduit, the floater is located in the conduit, the density of the floater is between the densities of two adjacent layers of media of the to-be-measured mixed liquid, an ultrasonic wave reflecting face is arranged on the side, close to the ultrasonic wave transceiver, of the floater, and the receiving-emitting end of the ultrasonic wave transceiver is towards the floater. According to the interface level meter in the technical scheme, ultrasonic waves emitted by the ultrasonic wave transceiver are returned through the floater located at the interface level position, returned energy is higher, and the position of the interface level can be more accurately reflected; in addition, the wave length of the ultrasonic waves is large, the ultrasonic waves can more easily bypass an interference object and are not prone to being disturbed by impurities in the mixed liquid, a false interface level can be avoided, and interface level measuring accuracy and interface level measuring reliability are improved.

The invention provides an eccentric correction method applied to the performance test of automobile antennas. Firstly, the spatial attenuation is corrected, and the distance between each measuring antenna and the measured antenna is calculated according to the position of the measured antenna, and the distance between each measuring antenna and the measured antenna is calculated according to the electromagnetic wave space attenuation formula and the measured The theoretical attenuation value when the antenna is located in the center of the test system is compared to obtain the spatial attenuation correction value, and then the spatial attenuation correction value is compensated and corrected for the electromagnetic field parameters obtained by each measurement antenna to obtain the measurement result when the antenna under test is located in the measurement center. Secondly, the angle of the measurement antenna is corrected. The measurement angle of the measurement antenna is relative to the measurement center. When the measured antenna deviates from the measurement center, the actual measurement result of the measurement antenna is the electromagnetic wave parameter at the angle of the measured antenna relative to the measurement antenna. Rather than relative to the center of the test system, it is necessary to calculate the angle value relative to each measurement antenna according to the position of the antenna under test as the actual measurement angle of each measurement antenna, and combine the corrected measurement parameters to obtain the antenna performance test in three-dimensional space result.

The invention, which relates to the technical field of the rotating shaft measuring mechanism, discloses a speed-measuring light-reflecting device comprising a rotating part, and the outer part of the rotating part is provided with at least one light-reflecting area and at least one non-light-reflecting area along the circumferential direction. The reflective areas and the non-reflective areas are arranged on the same reflective strip product, so that the reflective areas and the non-reflective areas are ensured to have consistent sizes and intervals, and the problem of inaccurate measurement results caused by pasting uniformity, position deviation and the like when a plurality of reflective sheets are pasted is solved.

The invention relates to a high-temperature gas flow measurement standard device and a detection method thereof. The gas flow standard device of the existing standard meter method seldom considers that the temperature of the gas to be tested is not very high in the actual working place of the meter to be tested, and ignores the response of the gas flowmeter to gases of different temperatures, making the measurement results not very accurate. The present invention includes a flow regulating device, a temperature regulating device, and a flow detecting device. The flow detecting device is installed upstream of the temperature regulating device, the meter to be checked is installed downstream of the temperature regulating device, and the flow regulating device is installed in the overall device. Upstream, positive pressure is used to generate flow. The invention can consider the problem of the gas flowmeter being tested under normal temperature gas and used under high temperature gas, analyzes the working characteristics of the flowmeter at different gas temperatures, evaluates the characteristics of the flowmeter more comprehensively and objectively, and improves the accuracy of measurement results.

The invention discloses a mobile power supply state detection instrument, and relates to the technical field of mobile power supplies. The mobile power supply state detection instrument comprises a box cover, a box body, a storage mechanism, a wire arranging mechanism and a tester body, wherein the box cover is mounted at the upper part of the box body; the tester body is mounted at the rear partinside the box body; a control electric plate is arranged inside the tester body; the wire arranging mechanism is mounted on the box body in front of the tester body; the wire arranging mechanism comprises a wire arranging column and wire arranging buckles; and the storage mechanism comprises a placing groove, a fixed plate, a connecting rod, a gear, a rack and a linking rod. The storage mechanismis arranged, so that the problem that a measurement result is inaccurate due to the fact that a charging panel is prone to falling because the charging panel is exposed to the outer side during long-term measurement in the prior art is solved.

The invention discloses a high-precision wide-range gas flow measuring device. The high-precision wide-range gas flow measuring device comprises at least two measuring branches, and one end of each measuring branch is short-circuited to be connected with an interface used for being connected with a to-be-measured gas source; a corresponding switch valve and a flow meter are sequentially arranged on each measuring branch from upstream to downstream. The device further comprises a measurement control system, wherein the measurement control system is in control connection with the switch valves through control lines and in sampling connection with the flow meters through sampling lines. The measuring branches are used, the number of the measuring branches can be increased according to needs,the measuring branches can be automatically selected during gas flow measurement through processing of the measurement control system, the automation degree is high, the problem of inaccurate measurement results caused by disassembly and assembly is solved, the flow measuring precision is improved, and the high-precision measuring range of the measuring device is expanded.

The invention provides a method for weight measuring of a dynamic vehicle and a dynamic vehicle weight measuring system. The method comprises the following steps of building an equation set including a number of linear fitting equations in a one-to-one corresponding to different vehicle speeds; obtaining the average vehicle speed of a vehicle and horizontal force and vertical force generated when the vehicle passes a certain section of horizontal distance, and calculating a resultant force; obtaining, from the equation set, a linear fitting equation corresponding to the average vehicle speed and for representing a linear relationship between the weight and the resultant force, and calculating the weight of the vehicle according to the resultant force. The system comprises roadbed, a weighing device, a memory and a processor. The method for weight measuring of the dynamic vehicle and the dynamic vehicle weight measuring system are advantageous in that, during weight measuring of the vehicle, the horizontal force generated due to horizontal impact of the vehicle is calculated, the problem that an inaccurate measuring result is caused by greater horizontal impact brought by a high-speed passing vehicle is solved, and the requirement for accurate weight measuring of the vehicle is satisfied.

The invention discloses an ultrasonic water meter reflective surface self-cleaning method based on state monitoring. Piezoelectric ceramic sheets are implanted into a first reflective column and a second reflective column respectively. The first reflective column and the second reflective column, of the same structure, are symmetrically arranged at the upstream and downstream inside a pipe segment of an ultrasonic water meter. The speed of water current in the pipe segment and ultrasonic beam signals monitored by the piezoelectric ceramic sheets in real time are taken as trigger judgment conditions to trigger a control circuit board to provide sine excitation signals to the piezoelectric ceramic sheets and to drive the piezoelectric ceramic sheets to vibrate, so that reflective surfaces on tops of the respective reflective columns are driven to vibrate and clean by the reflective surfaces themselves. The method effectively solves a problem that a measurement result of the ultrasonic water meter is inaccurate because of limescale accumulating on the reflective surfaces. The ultrasonic water meter needs not to be dismounted from a pipe network, and the self-cleaning processing will not affect normal metering of water flows. The service life of the ultrasonic water meter is prolonged, and the ultrasonic water meter can still be utilized in a measuring occasion with bad water quality.