82results about How to "Will not affect the measurement results" patented technology

The invention discloses an amplitude limiting device and an amplitude limiting method. The amplitude limiting device is used for calculating and limiting the operating amplitude of a telescopic arm of a telescopic arm frame type construction machinery vehicle, and comprises an ARM (Advanced RISC Machine) controller module, a tilting angle sensor module, a length measurement sensor module and a rotary coder module, which are connected through a CAN (Controller Area Network) bus. The amplitude limiting method comprises the following steps: obtaining the pitching angle of the telescopic arm, the rotary position angle of the telescopic arm and the arm length of the telescopic arm; according to the structural form, the pitching angle and the arm length of the telescopic arm, calculating the operating amplitude of the telescopic arm; according to the rotary position angle, looking up a corresponding amplitude limiting critical value in a pre-stored amplitude limiting critical value corresponding table; and according to the comparison result of the operating amplitude and the amplitude limiting critical value, limiting or warning the operating amplitude of the telescopic arm to guarantee the working safety of the construction machinery vehicle and avoid the roll-over accident.

The invention discloses an automatic large-size workpiece measurement system based on machine vision, and belongs to the technical field of machine vision measurement. The automatic large-size workpiece measurement system comprises an automatic large-size workpiece measurement hardware system and an automatic large-size workpiece measurement software system. The automatic large-size workpiece measurement hardware system comprises a light source, a camera, a lens and a high-accuracy moving device. The automatic large-size workpiece measurement software system comprises an image preprocessing algorithm, image data conversion modeling, a subpixel line / arc detection algorithm based on an improved RANSAC, and dimension calculation. The large-size workpiece can be measured by the system, and thesystem fills in the blank of application of machine vision in the field of large-size workpiece measurement. The software system can effectively eliminate noise and null points from an image and canrectify a non-uniform background. Production efficiency, stability and measurement accuracy of the system are improved.

The invention relates to a method for using an atomic absorption spectrometry to detect the chromium ion content in the soil. The method has the specific steps that: firstly, the invention establishes a chromium standard concentration-absorbance curve, then, the soil sample is added with the distilled water for moisturization, after that, the concentrated sulfuric acid and the concentrated phosphoric acid are used for digestion, the heating is carried out till the soil sample emits the white smoke, then the concentrated nitric acid is added till a large amount of white smoke comes out and the soil sample turns white, and the digestion liquid turns yellow green; the digestion liquid is transferred to a standard volumetric flask, the pH value is regulated to 7, 1 percent of H2SO4 - 1 percent of Na2SO4 solution is added for dilution to a standard scale, the mixture is shaken evenly and placed still till the solution is clarified, the upper layer of clear solution is taken for the measurement of the absorbance under a wavelength of 213.9nm, and the chromium ion content in the soil sample can be obtained by comparison with the established standard curve in the step a. The measurement error of the chromium ion content in the soil sample which is measured by the method of the invention is within 3 percent.

The invention provides a rock porosity measuring device, comprising a sample cup, a sample sleeve that sleeves a sample and is arranged in the sample cup, and a gas pipeline communicated with a bottom of the sample cup and a cover. The gas pipeline is connected with a plurality of valves. A vacuum pump, a standard chamber and a pressure sensor are also connected to the gas pipeline. By controlling opening and closing of the different valves, the vacuum pump may vacuumize the bottom or upper portion of the sample cup; the standard chamber and the pressure sensor can cooperate to measure the pressure value of the sample cup in different states and then the porosity of rock can be calculated. Through single sample loading and double vacuumizing, the rock porosity measuring device can measure total size of a rock sample and size parameters of a rock sample frame, a traditional porosity measuring process is changed, detection efficiency is improved, and measurement error is minimized.

The invention discloses a rapid and automatic determination method and device for tripolycyanamide content in dairy products, belonging to the field of food analysis. The method comprises the following steps that: in a unit (A) under an operating procedure, a first step, a multifunctional valve is in a state I, a pump A rotates, a pump B stops, a first sample flows into a column 2 for enriching tripolycyanamide, and the eluent flows into a column 1 for regenerating tripolycyanamide; a second step, the pump A stops, the pump B rotates, the cleanout fluid flows into the column 2 for cleaning the impurities therein; a third step, the multifunctional valve is switched to a state II, eluent flows into the column 2 for eluting and regenerating tripolycyanamide; the tripolycyanamide in the column 2 is substituted by the eluent and directly enters into a sampling ring of a unit (B) in the form of a sample plug, so as to perform volume quantification, injection, re-separation and detection, and a response signal is processed by a computer; and meanwhile, a second sample enters into the column 1 for enrichment, and the process of the column 2 is repeated. The method and the device are high in automation degree and excellent in reproducibility, and can analyze about 30 samples per hour; and the unit (A) in the invention can be used with various flow injection analysis systems.

The invention relates to a method for measuring the chromaticity of vinasse, and belongs to the technical field of analysis and detection. The technical problem to be solved is to provide a method for measuring the chromaticity of the vinasse more accurately. The method for measuring the chromaticity of the vinasse comprises the following steps of: a, preparing standard liquid for determining the chromaticity, then diluting the standard liquid into a series of solution with different chromaticities, measuring absorbance values of the series of solution with different chromaticities in a wavelength the range of 300 to 330nm, and making a standard curve, wherein the standard curve equation is Y=e*X+f, e and f are coefficients in the standard curve equation, X is a colorimetric value and Y is the absorbance value; and b, weighing M grams of vinasse and soaking the vinasse into N ml of solvent, filtering, measuring an absorbance value of obtained filtrate in the wavelength range of 300 to 330nm, and calculating the colorimetric value D of the filtrate according to the standard curve equation in the step a so as to obtain the average chromaticity of the vinasse according to the formula that the average chromaticity is equal to D*N / M, wherein the unit of the average chromaticity is degree / gram.

The invention discloses a measuring method of TMSP in a lithium battery electrolyte. The method includes the following steps of firstly, preparing regenerated liquid, wherein the regenerated liquid isa sulfuric acid solution; secondly, preparing leacheate, wherein the leacheate is an acetonitrile water solution of Na2CO3 and NaHCO3; thirdly, preparing a standard solution, wherein the standard solution is a TMSP water solution, and the concentration of the TMSP in the standard solution is 50-75 ppm (with end values of the two ends); fourthly, diluting a sample applicator solution with distilled water to obtain a to-be-measured sample solution, wherein the time from sampling to dilution completing of the sample solution is shorter than or equal to 20 min, and the theoretical concentration of the TMSP in the to-be-measured sample solution is the same as the concentration of the TMSP in the standard solution; fifthly, conducting anion chromatography on the standard solution and the to-be-measured sample solution through an anion chromatographic instrument; sixthly, calculating the content of the TMSP in the sample solution. The method has the advantages of being feasible, effective, convenient to implement, rapid and high in accuracy.

A power plant boiler high-temperature pipe system macro displacement measurement device based on CCD photography comprises a fixing assembly (2), a cross-shaped LED lamp group (3), a CCD camera (4), a lightproof acquisition metal cover (5) and an image processor (6); the fixing assembly (2) is composed of an anchor ear, a support and a flat plate, the support is fixed to the anchor ear, the flat plate is fixed to the support, and the anchor ear is tightly hooped to a high-temperature pipe system to-be-measured pipe (1); LED lamps form a cross curve array, and then the cross curve array is fixed at a central position of the flat plate of the fixing assembly; the CCD camera (4) continuously acquires images formed by the lamp group (3); the lightproof acquisition metal cover (5) covers the LED lamps and the CCD camera; the image processor (6) is connected with the CCD camera through a signal cable and converts the images into a gray value matrix; a certain image matrix is compared with an image matrix recorded at an initial moment, and displacements of a cross curve in the front and rear image matrixes are calculated; and, through combination with magnification and horizontal and vertical interval conditions of CCD pixels, an actual displacement of the lamp group in the object space is calculated. A safety status of a steam pipe can be monitored and evaluated in real time and can be transmitted remotely.

The present invention provides circuit marking method of medical ambiplasma cutting head and features the two-port voltage stabilizing device, which has one end connected to the medical ambiplasma cutting outer electrode and the cutting head connector, and the other end connected to the cutting head connecting line via marking connecting line; and the internal cutting electrode connected to the cutting head connector. The present invention, as one advanced and effective circuit marking method, has accurate and reliable measuring mark value, measuring precision not affected by the moisture and electric leakage factors and high electric pulse impact resistance.

The invention provides a hook lock buffering device for buffering and absorbing the shock of a pulley of an ejection system on an unmanned aerial vehicle. The hook lock buffering device comprises a torsion spring, a pin shaft, a counter lock catch and a base, wherein the pin shaft is connected with the counter lock catch and the base, and the torsion spring on the pin shaft acts on the base and the counter lock catch by certain pre-tightening force. The hook lock buffering device has the beneficial effects that the unmanned aerial vehicle and the pulley are in high-speed movement after being launched from the ejection system, the hook lock buffering device can meet the buffering and speed-reduction requirements of the pulley after the unmanned aerial vehicle is released, and thus the pulley is prevented from rigidly colliding with an ejection device.

A novel double-channel fluorescence-method dissolved oxygen detector is characterized by comprising a first sensor for detection of the content of dissolved oxygen by adopting a fluorescence quenching principle, a second sensor for detection of data of the dissolved oxygen, and a controller including a double-channel input module connected with the first sensor and the second sensor, a main control module connected with the input module, a display and key module connected with the main control module, a storage module connected with the display and key module, an output module connected with the display and key module, a control module connected with the output module, and a power supply module for supplying power for each module in the controller. By adopting the above technical schemes, the novel double-channel fluorescence-method dissolved oxygen detector has the beneficial effects that the detector can realize online continuous measurement, is guardless, realizes real water quality automatic monitoring, at the same time, detects two channels of the dissolved oxygen, reduces costs, and has the characteristics of small amount of maintenance, Chinese digital output, stable function and high accuracy.

The invention relates to the field of bearing parameter measurement instrument, specifically an axial play measurement tool for an angular contact ball bearing. The tool comprises a rack, a dial indicator, a bearing outer ring fixing mechanism, and a bearing inner ring axial force applying mechanism. The rack comprises a horizontal pedestal and a vertical column fixed on the horizontal pedestal, wherein the upper end of the vertical column is provided with a clamp for clamping the dial indicator. The bearing outer ring fixing mechanism comprises an upper fixing ring and a lower fixing ring, which are set coaxially. The lower fixing ring is fixedly connected with the central part of the vertical column, and the upper fixing ring is fixedly provided with a casing pipe which can slide on thevertical column. The bearing inner ring axial force applying mechanism comprises a pressing-down block and a jacking block, wherein the pressing-down block is a cylinder corresponding to the externaldiameter of the inner ring of a bearing, and the bottom of the jacking block is connected with a telescoping end of an electric push rod which is vertically set through the pressure sensor. A cylinderend of the electric push rod is fixed on the horizontal pedestal. The tool is simple in structure, is convenient to operate, and can precisely measure the axial play of the angular contact ball bearing.

The present invention discloses a mechanical clamping type high-voltage line load current telemetering instrument. The mechanical clamping type high-voltage line load current telemetering instrument comprises a shell, a clamping mechanism, mutual inductance coils and a data acquisition and transmitting device; the mutual inductance coils comprise a fixed mutual inductance coil and a movable mutual inductance coil; the fixed mutual inductance coil is fixed to the shell; the movable mutual inductance coil is hinged to the shell; a force accumulating spring in a compression state is arranged between the movable mutual inductance coil and the shell; the force accumulating spring can press the movable mutual inductance coil to the fixed mutual inductance coil, so that the movable mutual inductance coil and the fixed mutual inductance coil can be closed; and the clamping mechanism includes a rotation rod, a worm, a worm gear, a fixed sleeve, a connecting rod, a translating rod, a clamping connecting rod One, a clamping connecting rod Two and a rotating slider. The mechanical clamping type high-voltage line load current telemetering instrument has the advantages of structural simplicity and functional diversity. The clamping mechanism does not require a motor, so that the clamping mechanism will not consume power, and the mechanical clamping type high-voltage line load current telemetering instrument can be energy saving and environmentally friendly. Data signals are transmitted wirelessly, research and use can be facilitated.

The invention provides a femtosecond time resolution multi-channel lock-phase fluorescence spectrophotometer based on optical parametric amplification and relates to the technical field of spectral measurement. With the adoption of the spectrophotometer, output laser of a laser source is divided into two beams through a beam splitting sheet; one beam of the laser is emitted into a sample fluorescence light generation and collection system and is used for generating stimulating light for stimulating sample fluorescence light; the other beam of the laser is emitted into a pumping laser generation system and is used for generating pumping light for amplifying fluorescence light; the fluorescence light amplification can be carried out in an optical parametric amplification light path; and amplified fluorescence light is transmitted to a data acquisition system connected with the spectrophotometer through a light outlet of the spectrophotometer and then is subjected to time resolution fluorescence detection, and the data acquisition system is a multi-channel photodiode array interface lock-phase amplification data acquisition system. The spectrophotometer provided by the invention has the advantages that the light path is simple to adjust, the detection sensitivity is high, a measured result is relatively accurate and a spectrum is not easy to distort.

The invention provides a soil mixing wall (SMW) construction method pile section steel stress measurement method. The SMW construction method pile section steel stress measurement method comprises thefollowing steps that a plurality of test sections are calibrated on the H-section steel in the height direction of H-section steel; stress measurement devices are arranged at the connecting positionsof web plates and flanges of the H-section steel on the test sections; normal stress distribution states at the test sections are measured; and the internal force received by the test sections is further determined. The stress measurement devices are separately arranged at the two connecting positions of the web plates and the flanges of the H-section steel to measure the normal stress distribution states at the test sections of the H-section steel, and further calculation is carried out to determine the axial force, bending moment and shearing force received by the test sections, and the axial force, bending moment and shearing force distribution states in the height direction of the H-section steel are obtained, the internal force distribution state and the change rule of the H-sectionsteel are obtained, the stress measurement method is simplified, and the problem of low efficiency of a measurement method in the prior art is solved.

The invention provides a capacitance reading circuit of an inertia detecting element. The capacitance reading circuit is characterized in that the input end of a pre-amplifier is connected with the signal output end of the inertia detecting element, and the output end of the pre-amplifier is connected with a first sampling holder and a second sampling holder. The pre-amplifier is used for pre-amplifying output signals of the inertia detecting element, and then outputs the signals to the first sampling holder and the second sampling holder. The output end of the first sampling holder is connected with the first input end of a differential amplifier, and the output end of the second sampling holder is connected with the second input end of the differential amplifier. The first sampling holder transmits the output signals of the inertia detecting element to the first input end of the differential amplifier, and the second sampling holder transmits the output signals of the inertia detecting element to the second input end of the differential amplifier. The output voltage of the differential amplifier is a voltage signal of the inertia detecting element. The output voltage of the capacitance reading circuit and displacement of a mass block are in linear relation, and an electrical spring effect does not exist.

The invention relates to a tool for measuring the shrinkage rate of a plastic part. The tool comprises a tool body, a main rolling wheel, an auxiliary rolling wheel, an encoder, a single-chip microcomputer and a displayer, wherein the main rolling wheel is used for making contact with the surface of the plastic part; the auxiliary rolling wheel is used for making contact with the surface of the plastic part and is separated from the main rolling wheel; the encoder and the main rolling wheel are coaxial and are fixedly connected with each other, and the encoder outputs corresponding pulse signals along with rotation of the main rolling wheel; the single-chip microcomputer is arranged on the tool body, connected with the encoder and used for receiving the pulse signals, converting the pulse signals into actual measured sizes and comparing the actual measured sizes with preset theoretical measurement sizes to obtain the shrinkage rate of the plastic part; the displayer is arranged on the tool body and connected with the single-chip microcomputer. The tool has the advantages of improving measuring accuracy, and being light in weight, convenient to carry, free of spatial and regional influences and suitable for being used by various kinds of people in various environments.

The invention relates to a method for weighing a payload of a transport vehicle, a transport vehicle and a bogie structure. Vertical loads exerted on wheel suspension of the transport vehicle (1) are measured with sensors (19, 24, 27) and the measurement data is conveyed to a calculating unit (20) of weighing. Further, on a side surface of a horizontal arm (12) belonging to the bogie structure (11) there is arranged a sensor (24) for measuring the vertical load exerted on the horizontal arm (12).

The invention discloses an underground water body detection system and a detection method. The underground water body detection system comprises a display box and a detection device, the display box is connected with the detection device through a measuring rope, the detection device comprises a water quality detection mechanism, a latent mechanism, a flow velocity and flow direction detection mechanism and a fixing mechanism, and the water quality detection mechanism comprises a sealing cover plate, a shell and a flow meter. One end of the flow meter is connected with the top of the shell in a matched mode, the other end of the flow meter is connected with the sealing cover plate in a sealed and matched mode, a filter plate is arranged at the top end of the inner wall of the shell, a flow guide plate is arranged below the filter plate, a flow guide hole is formed in the flow guide plate, and the flow guide hole penetrates through the flow guide plate. The function that the detection device dives once to respectively collect and detect water at different depths is achieved, the detection device can be dived up and down and can be autonomously driven to move, the measurement process is simplified to the greatest extent, and the accuracy of measured data is greatly improved.

The invention relates to a method for detecting biological material in an airstream, in which method the airstream (16) is fed with the aid of sampling devices (12), a light beam (17) is emitted towards the airstream (16), a fluorescence signal (24) depicting the fluorescence of the particle (14) is created, a scattering signal (32) depicting the scattering of the light of the particle (14) is created, the fluorescence signal (24) and the scattering signal (32) are converted into discrete values, and an alarm value is defined, the discrete values are recorded cumulatively as hit points in an at least 2 - dimension a 1 measurement space equipped with selected dimensions, at least one index area (56, 58, 60) is preselected from the said measurement space, a cumulative index is calculated at an index frequency from the hit points accumulated on the each preselected index area (56, 58, 60), an alarm value, showing the presence of a selected biological material, is de fined from the said indices by using a preselected criterion.

The invention discloses a hub bearing used for mounting a wheel speed sensor of an anti-lock brake system (ABS). The hub bearing comprises an outer ring, and a sealing cover located on one axial sideof the outer ring. The sealing cover is used for sealing the hub bearing, and comprises a cover body and a framework ring; the axial end, close to the outer ring, of the cover body is fixed to the framework ring, the framework ring is fixed to the outer ring, and the wheel speed sensor is used for being fixed to the cover body; and according to the cover body and the framework ring, the cover bodyis provided with embedded portions, the framework ring is provided with recessed portions, and the embedded portions are buried in the recessed portions in a relative rotation resistance manner, so that relative rotation resistance between the cover body and the framework ring is achieved. According to the hub bearing provided by the invention, under the effect of relative rotation resistance cooperation of the embedded portions on the cover body and the recessed portions in the framework ring, relative rotation between the framework ring and the cover body can be prevented, accordingly measuring results of the wheel speed sensor are not affected, and the situation that external pollutants enter the bearing due to relative rotation between the framework ring and the cover body is also avoided.

The invention discloses a mining roadway rock stratum displacement monitoring device for underground engineering. The device comprises a mounting plate mounted on the top wall of a roadway; a measuring mechanism is mounted at the lower end of the mounting plate; two detection grooves are symmetrically formed in the side wall of the roadway; a balance mechanism is jointly mounted in each detectiongroove and at the bottom of the roadway; and the measuring mechanism comprises a measuring box. According to the device of the invention, the comprehensiveness of detection is improved through the twobalance mechanisms; the balance mechanisms and the measuring mechanism are connected through a rope so as to perform detection; high-precision equipment is more suitable for a roadway environment andcarrying out real-time monitoring; the horizontal placement of the measuring box is realized through adjusting screws; the balance of the measuring box is achieved through weight balancing columns; the long-term use of the device is facilitated; the balance mechanisms, the rope and a double-wheel-groove mechanical structure perform transmission outside the measuring box, and a feedback disc, a light sensor and light emitters are located in the measuring box, and therefore, the interference of the outside on measurement is reduced, and measurement accuracy is improved.

The invention discloses a sphere roundness and diameter detection device and method for a probe of a coordinate measuring machine. Three measuring ball rod holes are formed in a measuring ball clamping seat; the axes of the three measuring ball rod holes are in the same plane; the axes of the two measuring ball rod holes are symmetrical about the axis of the other measuring ball rod hole; and theincluded angle between the axes of every two adjacent measuring ball rod holes is 60 degrees. The invention provides a measuring ball clamping seat structure capable of clamping a coordinate measuringball to be measured. Then, the cylindricity measuring instrument workbench is fixedly connected with the measuring ball clamping seat; the three measuring surfaces on the to-be-measured coordinate measuring ball can be directly determined and obtained through the measuring ball clamping seat, so that the measuring ball clamping seat is ensured to be mounted once, the measurement of three mutuallyvertical circular surfaces of the same to-be-measured coordinate measuring ball can be realized, the measuring efficiency is greatly improved, and the interference problem caused by the movement of ameasuring needle of a coordinate measuring machine is avoided.

On one hand, the invention relates to a method for manufacturing a calibration model of a pipeline grouting quality detection instrument. The method comprises the steps: a supporting platform is built, a supporting framework is arranged on the supporting platform, and indication marks are arranged on the supporting platform; corrugated pipes are arranged in the supporting framework; corrugated pipe sections each provided with an opening are arranged; the corrugated pipes are fixed on the supporting framework; steel strands penetrate through each corrugated pipe; two end parts of each corrugated pipe are blocked off, and connection parts of the pipe sections with the opening and corrugated pipe sections are blocked off; grouting holes are equidistantly arranged in the pipe wall of each corrugated pipe; cement slurry is grouted into the grouting holes until the corrugated pipe sections with the grouting holes are filled with the cement slurry; a sleeve is sleeved on the peripheral wall of each connection part, and the openings are sealed; and a mold is mounted, and concrete is poured to form the calibration model. On the other hand, the invention relates to the calibration model manufactured by the method. The method can be used for precise manufacturing of 100% empty slurry sections in the corrugated pipes. A test is carried out by using the model manufactured by the method, and an accurate defect judging criterion can be worked out.

The embodiment of the invention provides a workpiece surface shape measuring system and a workpiece surface shape measuring method. According to the invention, the measuring stability of a capacitivesensor is high. Meanwhile, the complex linear correction of data is not required white the linear measurement can be well achieved. Moreover, surface oil contamination and other impurities do not influence the capacitive sensor, so that the measurement result of the capacitive sensor cannot be influenced. Meanwhile, the working surface of the capacitive sensor is a circular region and has a certain sampling area. Therefore, local large deviation errors in a primary sampling area can be homogenized. As a result, the accidental high point of the measurement result of the capacitive sensor is reduced and a reasonable surface shape peak valley value is obtained. The surface shape error measurement is greatly facilitated.

The invention discloses a device with a digital phase-locked loop and a numerical control oscillator for measuring phase noise and amplitude noise and an implementation method of the device. The device comprises a power dividing unit, two analog down-conversion and digitization subsystems, two digital phase-locked demodulation subsystems and a data processing unit. Signals to be measured are divided into two paths to be mixed with analog local oscillator signals respectively, and digital intermediate frequency signals are sent to the digital phase-locked demodulation subsystem after filtering,amplification and analog-to-digital conversion. The digital intermediate frequency signal is divided into two paths: one path is input into the digital phase-locked loop, so the tracking numerical control oscillator and the digital intermediate frequency signal are phase-locked, and the frequency control unit tracks the frequency of the numerical control oscillator, calculates a reference frequency and controls the numerical control oscillator to output a digital sinusoidal signal of which the frequency and phase are the reference frequency and phase; and the other path of signal is delayed and then mixed with an output signal of the numerical control oscillator, and then is sent to a digital processing unit after amplitude-phase demodulation and filtering to obtain a phase noise spectrumand an amplitude noise spectrum through cross-correlation calculation. The method is small in attenuation and high in precision.

The invention relates to a detection device for evaporation from water surface and belongs to the technical field of detection of evaporation from water surface. The detection device for evaporation from water surface comprises a fixing module, a probe detecting module and a bottom plate sliding-out module, wherein the fixing module comprises a top plate, a top plate fixing mechanism, a bottom surface fixing plate and a bottom plate fixing mechanism; the probe detecting module comprises an optical bar sliding mechanism, a screw rod transmission mechanism I, a detecting probe platform, a detecting probe platform down stroke control mechanism, a liquid bead levelling mechanism, a detecting probe fixing mechanism, a screw rod transmission mechanism II, a detecting probe platform up stroke control mechanism, a detecting probe, a step motor I and a step motor II; the bottom plate sliding-out module comprises a groove plate, a bottom plate sliding-out mechanism, a gear transmission mechanismand a bottom plate sliding-out travel control mechanism. The device is high in working efficiency, high in automatic degree and simple in operations; the manpower is greatly saved; the cost is saved;meanwhile, precise irrigation of crops can be guided.

A fast determination device for elongated and flaky particles in a coarse aggregate includes a first ruler plate, a second ruler plate and a baffle plate. The first ruler plate is rectangular; the second ruler plate is square; the first ruler plate and the second ruler plate are in rigid vertical connection; the first ruler plate and the second ruler plate are provided with scale marks; the baffle plate is L-shaped; the longer portion of the baffle plate is square, and length of side is the same the width of the first ruler plate; both sides of the first ruler plate are provided scale marks in metric system, and the scale unit is identified as mm, and is accurate to the millimeter; both sides of the second ruler plate are provided scale marks, and the scale is 3 times of the scale value in metric system, and the scale unit is three times of the millimeter scale, and is accurate to three millimeters. The fast determination device for elongated and flaky particles in the coarse aggregate can meet the requirements of one by one measurement on suspected elongated and flaky stones in the coarse aggregate sample after visual inspection, and has simple, fast and accurate determination process.

The invention discloses a river sediment content measuring device and method. According to the river sediment content measuring device and method, the problems that in the prior art, manual measurement of the river sediment content is large in danger, large in workload, and low in measurement accuracy are solved, and the beneficial effect of accurately and relatively quickly achieving a river sediment content value is achieved. According to the following scheme, the river sediment content measuring device comprises a shell; the exterior of the shell is provided with a mortar online density measuring instrument and a water depth measuring instrument which are connected with a controller, and the controller is connected with a remote terminal through the Internet of Things; the shell is provided with a water inlet and a drainage port for water feeding and drainage; and a water sucking piece and a water draining piece are arranged in the shell, and both connected with the controller to drive the shell to ascend and descend in a river. Through the mortar online density measuring instrument and the water depth measuring instrument, the content of sediment at different depths is averagedto obtain the average sediment content value of a measured point.

The invention relates to a flowing speed measurement method. The method comprises the steps: at least two parallel plane light beams are generated, the plane light beams are converged to form an effective measurement area for tracer particles to pass through, the effective measurement area is divided into a plurality of subareas, and each plane light beam is formed by converging at least two lightsources sent according to a preset time interval; incident light intensity and emergent light intensity which are emitted by the light sources and pass through the subareas are acquired respectively,and a first distribution image and a second distribution image of the tracer particles are formed according to attenuation of the incident light intensity and the emergent light intensity; cross-correlating of the first distribution image and the second distribution image is carried out to form a flow distribution of the tracer particles. According to the flowing speed measuring method and system, the mutual shielding phenomenon of particles can be avoided, the light intensity distribution, the background noise of the measured area and the like do not influence the speed measuring result, andthe influence of soot can be avoided by selecting the proper wavelength.