30results about How to "Solve measurement problems" patented technology

The invention discloses a method, a device, a medium and a program for forecasting noise of a water surface ship propeller based on excitation source reconstruction. The method comprises the following steps: firstly, determining vibration sensing point location distribution and sound field assessment point positions; determining the arrangement and size of a reconstruction source; obtaining vibration and sound transfer functions from the reconstruction source to the sound field assessment point, and numbering the functions in sequence; according to a transfer function invariance principle, establishing a propeller noise forecasting method based on a reconstructed excitation source; rapid prediction of the structural noise of the propeller shaft ship under multiple reconstruction sources is realized; the direct sound production coherence of the propeller is judged, if the direct sound production coherence is strong coherence, correction continues to be carried out to obtain vibration sound transfer functions from the reconstruction source to the sound field assessment point, and numbering is carried out in sequence; if the signal is weak coherence, a direct sound production noise source model is established based on a sound-sound transfer function, radiation noise under direct sound production of the propeller is obtained through calculation, and prediction of the propeller noise considering direct sound production is achieved based on the vector superposition principle. The method is suitable for ship thruster shafting vibration monitoring and thruster noise rapid forecasting and evaluation.

The invention discloses a high-resolution angular displacement absolute measurement method and device based on color coding imaging, belongs to the technical field of photoelectric angular displacement measurement, and aims to solve the problems in the prior art. A stepping motor of the device is connected with the center of the back of a circular coded disc, and a bearing of the stepping motor rotates to drive the circular coded disc to rotate; the laser light source and the high-speed CCD camera are placed right in front of the circular coded disc, and the high-speed CCD camera, the stepping motor and the center of the circular coded disc are coaxially placed and are connected with the PC terminal; laser emitted by the laser light source is vertically incident on a coded disc outer ring RGB color block on the front surface of the circular coded disc to form a laser circular light spot as a target detection point; when the stepping motor rotates, the high-speed CCD camera shoots the circular coded disc in real time to obtain a coded disc image signal with a target detection point; and the high-speed CCD camera shoots and stores the image signal in real time and uploads the image signal to the PC terminal for specific demodulation of rotation angle information. The device and the measurement method thereof have the measurement advantages of higher precision and high resolution.

A crack tip deformation in-situ measurement method based on sub-reference image splicing matching DIC includes the steps that firstly, the two sides of a compact tensile CT test piece are processed, one side is polished through abrasive paper, speckle spraying is conducted on the other side, a microscopic camera moves in the crack growth direction at the same step length, and multiple speckle images are shot; obtaining a whole-field reference image by using an image splicing technology, and obtaining a reference image corresponding to any position on a crack propagation path in cooperation with a template matching technology; speckle images collected in the hysteresis influence interval are matched with a global reference image, a corresponding reference image is captured, data of a crack tip displacement field and a smooth surface image shot by a camera on the other side are analyzed through a DIC technology to obtain a crack tip morphology change trend, and a result is further calculated through the data. According to the method, the Qamp is obtained at low cost; in the P steel crack propagation process, the deformation field of the crack tip and the crack morphology change under any crack length in an area are affected by overload hysteresis.

The invention discloses a construction method and application of a rolling stone impact open cut tunnel lining structure damage evaluation system. Aiming at the defect of lack of a graphical evaluation system in the prior art, the invention provides the construction method of the system for evaluating the damage of the open cut tunnel lining structure caused by rolling stone impact. The method comprises the following steps: firstly, constructing a lining structure rolling stone impact damage constitutive model expressed by damage factors, and constructing a rolling stone-open cut tunnel three-dimensional finite element model; then carrying out rolling stone impact and lining structure dynamic response and damage evolution stage characteristic analysis, and constructing a macroscopic damage stage evolution model expressed by macroscopic damage indexes and vault deflection; determining a damage evaluation criterion by using the ratio of the deflection of the vault to the allowable deflection as a damage evaluation index; a damage master control variable is screened through simulation testing and dimensional analysis; and finally, establishing a damage quantitative evaluation system of the generalized P-I graphical method. The problem of macroscopic process and measurement of damage of the concrete arch structure under the impact load is solved, and a new thought is provided for research and technical development of the problem.

The invention discloses an integrated circuit standard unit time sequence arc pulse delay measurement system, which comprises an on-chip clock generation module used for generating a high-frequency clock on a chip as a reference counting clock; according to the on-chip standard unit time sequence arc generation circuit, pulse broadening of time sequence arcs is achieved through a multi-stage cascaded circuit structure of the same time sequence arcs, and single time sequence arc delay is measured through superposition of multi-stage same time sequence arc delay; the on-chip time sequence arc counting circuit is used for counting the broadened time sequence arc pulses by using an on-chip high-frequency clock as a reference clock; the on-chip input and output module is used for controlling the selection of various integrated circuit standard unit types, the selection of time sequence arcs and the output of the counter; and the wafer circuit testing machine is used for performing wafer-level electrical connection by using a wafer circuit testing probe, supplying power to the integrated circuit standard unit and inputting and outputting signals. According to the invention, integrated circuit standard cell time sequence arc measurement and measurement of all time sequence arcs of all standard cells in a standard cell library are realized.

The utility model discloses a pretreatment device and an ammonia nitrogen analyzer, and belongs to the technical field of chemical detection equipment. The pretreatment device is used for filtering sewage entering an ammonia nitrogen analyzer and comprises a filtering unit connected with a liquid collector of the ammonia nitrogen analyzer, and an anti-blocking unit is arranged between the filtering unit and the liquid collector of the ammonia nitrogen analyzer and used for pretreating the sewage entering the liquid collector; the water inlet end of the filtering unit is connected with a water supply pipeline, the water outlet end of the filtering unit is connected with a three-way valve, and the three-way valve is further connected with a liquid inlet pipeline of the liquid collector; the anti-blocking unit comprises a blowback air pump and a blowback gas conveying pipe, one end of the blowback gas conveying pipe is connected with the blowback air pump, and the other end of the blowback gas conveying pipe is connected with the three-way valve. According to the pretreatment device disclosed by the utility model, the blockage of the filter unit can be avoided through the arranged anti-blocking unit, the problem that normal measurement of an instrument is influenced by abnormal sample introduction caused by blockage of the ammonia nitrogen analyzer is solved, the loss of the ammonia nitrogen analyzer is reduced, and the service life of the ammonia nitrogen analyzer is prolonged.

The invention discloses a nondestructive detection method for the martensitic transformation amount in austenitic stainless steel. The method establishes a correlation model between the martensitic transformation amount and the hysteresis loop curve. In the actual engineering method for determining the transformation amount of austenitic stainless steel, the method achieves an order of magnitude of efficiency over the traditional detection method. The detection equipment occupies a small area and has certain portability. The method does not need to prepare samples in advance, and nondestructive detection is achieved. The method is easy to use, has low professional requirements for testers, has a wide detection application range, and can meet the needs of a large number of rapid determinations of the martensitic transformation amount of austenitic stainless steel.

The utility model discloses a device for measuring the dry slag rate of liquid reduced lead. The device comprises a sampling mechanism for sampling reduced lead liquid from a liquid lead bag, and an ingot casting mold for preparing the reduced lead liquid taken by the sampling mechanism into a lead ingot for measuring the oxygen content and the sulfur content so as to calculate the dry slag rate of the reduced lead, the sampling mechanism comprises a sampling rod, a sealing plug matched with the sampling rod for sampling, and a handle connected to the outer wall of the sampling rod; the top end of an inner hole of the sampling rod is in a circular truncated cone shape facilitating installation of the sealing plug. The lower part of the sealing plug is in a big-end-up circular truncated cone shape matched with the top end of the inner hole of the sampling rod; the ingot casting mold is in a hollow cylinder shape with a bottom, and the interior of the ingot casting mold is in a big-end-up circular truncated cone shape so that a circular truncated cone-shaped lead ingot can be cast. The dry slag rate measuring device is simple in structure, rapid in dry slag rate measurement and high in accuracy, solves the problems that a conventional wet lead dry slag rate measurement period is long, measured data are easy to interfere, and measured values have deviation, and can better guide adjustment in the production process.

The embodiment of the invention discloses a current detection circuit and current detection equipment, the current detection circuit comprises a power supply input interface, a power supply output interface and a detection circuit, and the power supply output interface is connected with a circuit to be detected; the detection circuit comprises a shunt unit, a first connecting end, a second connecting end and a third connecting end, the shunt unit is connected between the first pole of the power input interface and the second connecting end, a first ampere meter is connected between the first connecting end and the second connecting end, and a second ampere meter is connected between the second connecting end and the third connecting end; when the current of the to-be-tested circuit is greater than a preset threshold value, the shunting unit is conducted, and the current drives the second ammeter to generate pointer deflection through the shunting unit; when the current of the to-be-tested circuit is smaller than a preset threshold value, the shunting unit is switched off, and the current drives the first ammeter to generate pointer deflection; wherein the first ampere meter and the second ampere meter are different in measuring range. The test efficiency and reliability can be improved.

This invention discloses a convenient-to-operate coaxiality testing device for a drive mechanism, comprising: an annular connecting mechanism for stable and fixed assembly with the output shaft end face of the drive mechanism; an intermediate connecting member connected to the annular connecting mechanism for multi-angle adjustment of the annular connecting mechanism; a dial connecting block connecting the intermediate connecting member and a dial indicator; and a dial indicator whose pin is in contact with the output shaft of the drive mechanism. This invention features a simple structure, practical function, and can quickly and accurately measure the coaxiality of a drive mechanism. It boasts high assembly and adjustment efficiency, high flexibility, strong applicability, and low cost, and can be extended to other similar products.

The utility model provides soil texture sample preservation equipment for land surveying and mapping, which comprises a box body, a box cover arranged at the top of the box body, and a driving piece arranged on the inner wall of the box body, the clamping assembly is arranged on the outer side of the driving part and comprises a first fixing frame, the first fixing frame is located on the outer side of the driving part, one side of the first fixing frame is fixedly connected with a connecting rod, the other end of the connecting rod is fixedly connected with a second fixing frame, and one side of the second fixing frame is fixedly connected with a fixing pipe. According to the utility model, the driving piece is arranged to conveniently drive the clamping assembly to move, and the clamping assembly is arranged to conveniently clamp a sample, so that the situation that the integrity and the accuracy of the sample are influenced due to the fact that particles fall off or are broken in the transportation process is avoided.

The invention discloses a force measuring tool for a spring with a large length-diameter ratio, and belongs to the technical field of spring detection, the tool comprises an upper pressure head and a base, the upper pressure head comprises a thin-wall plate and a guide cylinder which are fixedly connected, the outer edge of the thin-wall plate is larger than the outer diameter of the spring to be measured, and the outer diameter of the guide cylinder is smaller than the inner diameter of the spring to be measured; the base comprises a bottom plate and a core rod which are fixedly connected, the guide cylinder and the core rod are in clearance fit and can slide mutually in the axial direction, the guide cylinder and the core rod are each of a hollow structure and interact with each other, the mass of the measuring tool pressed on a spring is greatly reduced, the measuring mode capable of obtaining an accurate result is simplified, the structure is simple, and the cost is low. The influence of the measuring tool on the spring measuring result is reduced as much as possible.

The invention discloses a method and device for measuring the load of a drop shock test of an unmanned helicopter with a skid-type landing gear. The device comprises a load measurement system, an unmanned helicopter simulation test piece, a ground support system and a lifting control system; the lifting control system is arranged on the ground support system, and is used to lift the unmanned helicopter simulation test piece, complete the double-skid landing and / or forward flight or side flight landing of the unmanned helicopter simulation test piece, and control the drop height of the unmanned helicopter simulation test piece; the load measurement system is arranged on a support platform of the ground support system, and is used to collect the impact load and acceleration of the unmanned helicopter simulation test piece when landing; the method obtains the dynamic response of the unmanned helicopter drop shock test load sensor and the acceleration sensor by using a dynamic acquisition system, and obtains its equivalent ground impact load, thereby solving the problem that the feedback load cannot be accurately identified and measured when the unmanned helicopter landing gear falls to the ground.

The invention provides a blind measurement method for the coaxiality of an underwater deep hole channel of a heavy water reactor. The blind measurement method comprises the following steps: step 1, establishing a measurement zero reference surface; 2, establishing an axis system vertical to the measurement zero reference surface by taking the measurement zero reference surface as a reference; 3, measuring the distance between the pre-measurement hole channel and the measurement zero reference surface; 4, measuring the diameter of the pre-measuring hole; and step 5, measuring the coaxiality of the pre-measuring hole and the upper port hole of the deep hole channel. According to the invention, high-irradiation, long-distance, underwater and blind measurement of the coaxiality of the inner hole of the vertical deep hole channel of the nuclear power heavy water stack is realized, accurate contact measurement is realized, the accuracy is high, a high-irradiation environment is furthest away, and the irradiation dose of an operator is greatly reduced.

The present invention relates to the field of wind turbine control, and in particular to a calculation method for intelligent online compensation of yaw static error of a megawatt-class wind turbine. The method comprises the following steps: calculating the ratio of the assumed wind wheel inflow wind speed to the anemometer output value; calculating the real-time power coefficient according to the ratio of the assumed wind wheel inflow wind speed to the anemometer output value; calculating the axial induction factor according to the real-time power coefficient; calculating the line speed ratio value at the wind vane; and calculating the instantaneous wind direction deviation according to the axial induction factor and the line speed ratio at the wind vane. Through algorithm calculation, the wind direction measurement deviation is judged in real time, and the deviation is intelligently corrected, thereby solving the measurement problem of the traditional anemometer and achieving the purpose of increasing the power generation of the wind turbine without increasing the hardware cost.

The invention discloses a satellite load antenna hinge coaxiality adjustment test system and a test method thereof. The system is characterized by comprising a light source system which is fixed on an upper pin shaft of an antenna hinge in a manner of realizing 360-degree reciprocating rotation motion on the upper pin shaft; the imaging system is fixed on the lower pin shaft of the antenna hinge in a manner that the imaging system can realize reciprocating rotation motion greater than 180 degrees on the lower pin shaft; and the display control system is used for man-machine interaction, displaying the dynamic condition of the cross image on the target surface of the camera of the imaging system, searching the center of the cross through an image processing algorithm, fitting a circle curve and displaying and measuring the coaxiality of the antenna hinge, and has the functions of recording and inquiring measured data. The method solves the problems of indirect measurement, inaccurate measurement result and the like, can be used for satellite load antenna assembly production, and is high in precision, capable of realizing direct measurement, traceable in data and high in assembly and adjustment efficiency.

The invention discloses a method and system for drawing a house graph based on laser RTK, and the method specifically comprises the following steps: S1, measuring a first inflection point P1 of a house through the laser RTK, and then drawing a first drawing point T1 corresponding to the first inflection point P1 at a mobile terminal; s2, measuring a second inflection point P2 adjacent to the P1 by using laser RTK, and judging whether a corresponding coordinate point can be obtained or not; if yes, directly acquiring the coordinate of a second inflection point P2, and entering S5; if not, entering S3; s3, moving the laser RTK on a connecting line of the first inflection point P1 and the second inflection point P2 to obtain a first position point P, 2 of a coordinate measured and obtained by the laser RTK; then measuring a first distance L1 from the first inflection point P1 to the second inflection point P2, and calculating a second distance L2 from the first inflection point P1 to the first position point P, 2, thereby calculating a length adjustment proportion; s4, calculating the coordinate of the second inflection point corresponding to the second drawing point T2 on the mobile terminal according to the length adjustment proportion and the drawing proportion; s5, calculating the coordinates of a corresponding second drawing point T2 according to the coordinates of the second inflection point P2; and S6, measuring other inflection points of the house by using the laser RTK, and repeating the steps S2 to S5.

The utility model discloses a device used for measuring converter transformer valve side AC voltage, comprising a main body unit composed of a resistance-capacitance voltage divider and used for dividing AC-DC superposed voltage; and the secondary voltage dividing unit is connected in parallel with a capacitive voltage divider on an output terminal of the resistance-capacitance voltage divider and is used for isolating direct current voltage from the direct current component output by the main body unit. The problem of converter transformer valve side AC voltage measurement is solved.

The utility model discloses a gas production testing device which comprises a communicating pipe, a driving piece, a split piece, a gas pressure detection piece, a valve, a first collector and a weight detection piece, an inlet of the communicating pipe directly faces the driving part, the driving part is configured to drive the end to move close to or away from the inlet of the communicating pipe, the communicating pipe is sequentially provided with a split part, an air pressure detection part, a valve and a first collector in the flowing direction, and a weight detection part is arranged at the bottom of the first collector. The device has the beneficial effects that the communicating pipe is arranged to export the gas produced by the battery, the gas pressure detection piece is matched to detect the gas production speed, the weight detection piece is matched to detect the gas production weight, and the first collector is used for collecting the produced gas, so that the complete data of the gas produced in the formation process is finally collected, and the gas produced in the formation process is analyzed.

The invention relates to a non-dissipative balancing management system for a space lithium-ion battery, belonging to the technical field of lithium-ion battery management; the system comprises two non-dissipative balancing management modules and a lithium-ion battery pack; the two non-dissipative balancing management modules are respectively connected to the lithium-ion battery pack; the two non-dissipative balancing management modules use a dual-machine cold standby mode to achieve balancing control of the lithium-ion battery pack; the non-dissipative balancing management module comprises a central control module, a first balancing module and a second balancing module; the first balancing module comprises a low 3-way group voltage conditioning circuit, a 1-11-way balancing control circuit and a frequency tracking point circuit; the second balancing module comprises a high 3-way group voltage conditioning circuit and a 12-22-way balancing control circuit; the lithium-ion battery pack comprises 22 battery cells connected in series; the two battery cells are respectively connected in parallel to the 1-22-way balancing control circuit; the invention solves the problem of measuring the battery cell voltage under a high common mode voltage, and can also achieve energy transfer between lithium-ion battery cells.

The present invention discloses a method for generating a wind turbine inspection route based on an unmanned aerial vehicle. Through completely autonomous flight, the longitude and latitude of the wind turbine and the altitude of the hub center point are automatically remeasured each time an inspection is performed to avoid errors caused by longitude and latitude. A classification model is added when identifying the yaw angle and blade phase angle of the wind turbine, and the recognition rate is improved through redundancy; after arriving directly in front of the hub, the final correction is performed to ensure that there is no deviation in the position of the wind turbine, solving the problem of measurement and longitude and latitude deviation in the prior art patents. At the same time, a curve fitting equation for blade pre-bending is introduced to solve the problem that the blade will exceed the camera screen when inspecting the leading and trailing edges. This application automatically obtains the key parameters, yaw angle and blade phase angle of the wind turbine through a drone, and detects the blade pre-bending through a curve fitting algorithm, and finally generates an accurate drone blade inspection route.

The application provides a method for measuring and calculating the included angle between two rotating shafts, and belongs to the technical field of aero-engines. The method comprises the following steps: introducing a third smooth plane; obtaining the end face runout of the first smooth plane measured by a displacement sensor on the first rotating shaft when the first rotating shaft rotates, and obtaining a first measurement result; obtaining the end face runout of the first smooth plane measured by a displacement sensor on the second rotating shaft when the second rotating shaft rotates, and obtaining a second measurement result; obtaining the included angle between the two rotating shafts and the smooth plane; obtaining the angular displacement alpha and beta of the first rotating shaft corresponding to the minimum value in the first measurement result and the second measurement result, respectively; and finally, drawing the direction vectors of the first rotating shaft and the second rotating shaft in a three-dimensional Cartesian coordinate system, and solving the included angle between the two rotating shafts according to the definition of vector inner product, thereby solving the problem of measuring and calculating the included angle when the radial reference surfaces of the two rotating shafts are not completely exposed.

The invention discloses a photoelectric hybrid integrated high-speed time-frequency domain general zero-beat detector, and belongs to the technical field of continuous variable quantum communication. Aiming at the problems that an existing time domain zero-beat detector cannot measure a high repetition frequency pulse signal light field and the integration level of the zero-beat detector is further improved, an optical fiber array, a silicon-based photoelectron chip and a low-noise multi-stage chip amplification circuit are integrated on a ceramic substrate with a low thermal expansion coefficient by adopting a hybrid integration method; the photoelectric hybrid integrated high-speed zero-beat detection chip which is small in size, good in stability and high in measurement precision is developed. And meanwhile, the common-mode rejection ratio of the zero-beat detector to the pulse light field response is optimized by combining the advantages of the chip technology. On the basis, technologies of a chip peripheral power supply circuit, a metal shell, an anti-reflection film and the like are combined, and the photoelectric hybrid integrated high-speed time-frequency domain universal zero-beat detector with the advantages of small size, low power consumption, high precision, good stability, strong anti-interference performance and the like is developed.

The utility model discloses a die body for quality control of a nuclear magnetic simulation positioning machine, and belongs to the field of quality control measurement of the nuclear magnetic simulation positioning machine. The die body for quality control of the nuclear magnetic simulation positioning machine comprises a uniform image measurement module and a geometric deformation measurement module which are connected with each other, a laser lamp positioning groove is formed in the end face, close to the geometric deformation measurement module, of the uniform image measurement module, scale marks are arranged on the outer side of the uniform image measurement module and the outer side of the geometric deformation measurement module, and a horizontal adjusting protruding strip is arranged on the end face of the uniform image measurement module. According to the utility model, the die body has a multifunctional measuring capability, and the laser lamp positioning precision, the positioning bed precision, the geometric deformation and the image uniformity can be detected without replacing a measuring tool; the time for replacing the die body and re-positioning is greatly saved, and the working efficiency is improved.

The present invention belongs to the technical field of refrigeration and air conditioning technology for carbon dioxide working fluid, and specifically relates to a device and method for testing the oil content performance of a carbon dioxide heat exchanger based on an air conditioning system. The present invention includes a compressor and an oil separator, the refrigerant outlet of the oil separator is connected to the refrigerant pipeline, and the oil outlet is connected to the oil outlet pipeline; the refrigerant enters the compressor inlet after passing through a pressure differential valve, a flow regulating valve, a gas cooler, a liquid storage tank, a subcooler, a first flow meter, a throttling expansion valve, an evaporator, and a superheater in sequence; the refrigerant pipeline also includes a test branch and an intermediate heat exchanger; at the same time, an oil measurement branch for measuring the oil content by a load-bearing method is also provided; the oil outlet pipeline includes an oil reservoir, and two branch oil circuits are arranged at the outlet of the oil reservoir. The present invention can accurately measure the heat exchange of the heat exchanger at different oil contents in an air conditioning system of carbon dioxide working fluid, and ultimately provide an accurate basis for the one-to-one matching of the heat exchange and oil content of the heat exchanger.

A device for precisely measuring the levelness of a plate straightening machine roller belongs to the technical field of plate straightening machine maintenance equipment and is used for precisely measuring the levelness of the plate straightening machine roller. According to the technical scheme, a measuring base frame is a rectangular box body, a plurality of sliding blocks are placed in the box body of the measuring base frame, the sliding blocks are in sliding fit with the inner wall of the box body of the measuring base frame, a vertical insertion hole is formed in the middle of each sliding block, a guide column on the upper portion of a measuring arm penetrates through the insertion holes of the sliding blocks, and two inclined measuring supporting arms are welded to the lower portion of the measuring arm. The two measuring support arms are clamped on the upper surface of a measured roller, the lower end of the dial indicator is fixedly connected to the upper surface of the measuring base frame, the head of the dial indicator is opposite to the upper end face of the guide column, and the two ends of the measuring base frame are respectively connected with a support. The levelness measuring device can realize accurate measurement of levelness of the working roller and the supporting roller of the straightening machine roller, is suitable for levelness measurement of roller surfaces with different roller diameters and roller intervals, can be used in a limited space, and provides measurement data for assembly adjustment and online detection.

This invention provides a non-contact residual current detection method and related equipment, comprising: deploying a magnetic sensor array on a target wall to acquire measured values ​​of magnetic induction intensity components and inputting them into a particle swarm optimization algorithm; establishing a mathematical model between the magnetic induction intensity components and live wire current, neutral wire current, concealed installation depth, and horizontal offset, and constructing a dataset based on the upper and lower limits of conductor positions and currents in actual working conditions, all of which are input into the particle swarm optimization algorithm; calculating the calculated value of the magnetic induction intensity component at each particle position based on the mathematical model, and the sum of squares of the differences between each calculated value of the magnetic induction intensity component and the measured value of the magnetic induction intensity component; using a constructed penalty function to superimpose the out-of-bounds amount as a penalty term onto the sum of squares of the differences, obtaining the optimal position of the particle swarm after iteration termination as the optimal solution; obtaining the residual current detection result based on the optimal solution; this invention achieves non-contact detection of residual current in concealed wiring without damaging the wall or inserting conductors.

The invention provides a method for determining the content of sucrose octasulfate potassium salt, and particularly relates to the field of medicines. A cation exchange SCX filler and a C18 filler are mixed according to the ratio of 1: (3-5) to serve as a filling agent; 50 mM / L ammonium acetate and acetonitrile are used as mobile phases, the ratio of ammonium acetate to acetonitrile is (90-100): (3-7), and isocratic elution is performed; a detector is an electrospray detector, the spray temperature is set to be High, and the half-peak width of the acquisition frequency is 0.1 min; the column temperature is 28-32 DEG C; the flow velocity is 0.7-0.9 ml / min; the sample injection volume is 3-7 microliters; and the operation time is 8-12 minutes. The method provided by the invention can effectively quantify the content of sucrose octasulfate potassium, thereby strictly controlling the quality of drugs.

The invention discloses a transmitting and receiving beam dual-polarization gain consistency calibration system and method. The system comprises a terminal device and a calibration device mounted on an unmanned aerial vehicle. The calibration device comprises a signal generation module, a signal receiving module, a circularly polarized antenna, a control module and a communication module. The terminal equipment sends a first control instruction to the calibration device, the circularly polarized antenna radiates a horizontally polarized electromagnetic wave signal and a vertically polarized electromagnetic wave signal, and the signals are received and processed by the tested radar to obtain a received beam dual-polarization gain difference; the terminal equipment sends a second control instruction to the tested radar, the tested radar radiates a horizontal polarization electromagnetic wave signal and a vertical polarization electromagnetic wave signal, and the signals are received and processed by the calibration device to obtain a transmitting beam dual-polarization gain difference; and the terminal equipment calculates a calibration value according to the receiving beam dual-polarization gain difference and the transmitting beam dual-polarization gain difference. According to the invention, the problem that radar transmit-receive beam dual-polarization gain difference measurement cannot be realized in an external field is solved.

The present invention discloses a surrounding rock deformation monitoring anchor with high-strength anti-impact ground pressure characteristics, including an anchor body, the head end of which is provided with an anchor fixing end; an anchor through hole, which is arranged in the anchor body; a rope ruler, the head end of which is fixedly connected to the anchor fixing port, and the end of which extends to the outside of the anchor body through the anchor through hole; an anti-impact ground pressure device, which is arranged on the outer peripheral side of the anchor body. Due to the increase in the number of impact ground pressure occurrences, it becomes more difficult for the monitoring anchor to support itself during the monitoring process by relying on its own support strength. The present invention adopts an anti-impact ground pressure impact device, which can generate a huge buffering force and offset the huge impact ground stress generated by the displacement of the surrounding rock. Based on the observation of the front and rear changes of the rope ruler on the anchor body and the end outlet of the anchor through hole, the rope ruler reading on the anchor body before and after the deformation can be observed through the deformation of the surrounding rock to perform accurate measurement.