67results about How to "Accurate data measurement" 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 relates to a supercritical carbon dioxide high-temperature and high-pressure PVT testing and methane displacement integrated experimental device and method. The device comprises a liquidcarbon dioxide storage tank, a liquid methane storage tank, a displacement pump, a core holding unit, a constant-temperature oil bath system, a PVT barrel, a ring pressure generation device, a pressure difference sensor, a flow sensor, a pressure sensor, a temperature sensor, a sodium hydroxide absorption storage tank and a gas storage tank, wherein the liquid carbon dioxide storage tank and theliquid methane storage tank are separately connected to an inlet of the PVT barrel via a first pipeline, a second pipeline and a third pipeline; an outlet of the PVT barrel is connected with an inletof the core holding unit through a fourth pipeline; a manifold tee is separately connected with the outlet of the core holding unit, the inlet of the sodium hydroxide storage tank and the third pipeline through a fifth pipeline, a sixth pipeline and a seventh pipeline; and the outlet of the sodium hydroxide storage tank is connected with the gas storage tank through an eighth pipeline. By the supercritical carbon dioxide high-temperature and high-pressure PVT testing and methane displacement integrated experimental device and method, the changing law of the phase state, viscosity and displacement efficiency of supercritical carbon dioxide at a high temperature and under high pressure along with the temperature and pressure can be researched.

The invention relates to a partial discharge test system for a cable buffer layer under an extremely uneven electric field. The partial discharge test system is mainly characterized by comprising an alternating-current voltage source, a high-voltage electrode, a grounding electrode, a shielding box and a partial discharge acquisition device; the high-voltage electrode, the grounding electrode andthe to-be-tested sample are installed in the shielding box and used for shielding electromagnetic interference signals. The high-voltage electrode is connected with the high-voltage side of the alternating-current voltage source through the protective resistor, the grounding electrode is connected with the ground wire side of the alternating-current voltage source, a to-be-tested sample is placedbetween the high-voltage electrode and the grounding electrode and is in close contact with the high-voltage electrode and the grounding electrode, and the partial discharge acquisition device is installed between the grounding electrode and the ground wire side of the alternating-current voltage source. According to the invention, the high-voltage electrode, the grounding electrode and the to-be-tested sample are installed in the shielding box, so that external noise signals are effectively shielded, data measurement is carried out more accurately, partial discharge pulse waveforms can be analyzed, different types of discharge sources are distinguished through fuzzy clustering analysis, separation of discharge signals is realized, and the partial discharge test requirement is met.

The invention provides a manufacture method of a high temperature resistant fiber grating. The manufacture method comprises the steps that hydrogen-carrying treatment is carried out on an ordinary single-mode quartz optical fiber coated with polyimide in a high-pressure environment; the optical fiber is placed into a high-temperature oven for annealing; a grating to be written area of the optical fiber is soaked by concentrated sulfuric acid at high temperature; an ultraviolet laser is used for fiber grating writing; the grating bandwidth growth rate is between 2 pm/s and 4pm/s; after the grating spectral line bandwidth stops growing, exposure is continued for a period of time; polyimide is used to re-coat bare positions of the optical fiber; the fiber grating is placed into the oven at the temperature of 400+/-10 DEG C for high-temperature heat treatment; and the center wavelength and the reflectivity of the grating spectral line are detected on-line. According to the invention, a sensor manufactured by the high temperature resistant fiber grating can be directly used in a working environment of 400 DEG C; and the sensor designed by the grating has the advantages of simple and direct use and accurate data.

The invention discloses a quality detection device for a door/window screen, belonging to the field of quality detection. The quality detection device disclosed by the invention comprises an overall frame, a screen clamping mechanism, a detection mechanism and a loading mechanism, wherein the screen clamping mechanism adjusts the relative height of a screen fixing rod on the overall frame by utilizing a tensioning mechanism; a screen fixing clamping groove is formed in the overall frame, and the upper and lower sides of a to-be-detected screen are clamped by virtue of the screen fixing clamping groove and the screen fixing rod; the detection mechanism comprises a driving motor, a lead screw sliding table, a support frame, a detection meter bracket, a digital indicator and a sliding rail; the lead screw sliding table is driven by the driving motor and is used for driving the support frame to move along the horizontal direction; a measuring head of the digital indicator faces the to-be-detected screen, and the digital indicator is positioned in the middle of the to-be-detected screen; and the loading mechanism hooks the to-be-detected screen by virtue of a hook so as to realize tension loading of the to-be-detected screen. The special detection device and method are designed according to the screen detection standard, the structure is simple, the detection is convenient, and the intelligent degree is high.

The invention relates to a closed type fumigating and washing instrument for elbow joint segments. The closed type fumigating and washing instrument for elbow joint segments comprises a fumigating and washing sleeve, a control cabinet, an air pump, a liquid supply pump, a heating device, a liquid storage tank and a water storage tank. The fumigating and washing sleeve is correspondingly connected with the liquid storage tank and the water storage tank through two liquid return pipes respectively. The liquid supply pump is connected with the liquid storage tank and the water storage tank through first liquid supply pipelines, and is connected with the fumigating and washing sleeve through a second liquid supply pipeline. An air pressure sensor, a temperature sensor, a differential valve, two fixing pipes and a display device are arranged on the fumigating and washing sleeve, and inflation and deflation contraction sets are arranged on the inner walls of the two fixing pipes. The closed type fumigating and washing instrument for elbow joint segments has the advantages that the fumigating and washing instrument is wide in application range, applicable to users with different arm thicknesses and good in leakproofness; a user can know the current specific fumigating and washing condition conveniently, and data measurement is accurate; closed fumigating and washing of partial elbow joint segments can be achieved, the requirement for scientific and standard treatment can be met, and the temperature and the fumigating and washing pressure can be accurately controlled or set.

The invention relates to the technical field of safety tongs of elevators, and in particular relates to a device for detecting pulling force of safety tongs. The device comprises an electronic tension meter, wherein a pull ring of the electronic tension meter is connected with a hanging assembly for connecting a lifting pin of the safety tongs; the electronic tension meter is connected with a positioning bracket; and the positioning bracket comprises a clamping slot connected with the top of a lower beam linking shaft fixing plate in a clamping manner. According to the device for detecting the pulling force of the safety tongs, a measurement mod and a reference are unified, namely that the upward lifting height and the lifting direction are fixed, and the error rate is low; measurement of data is more precise, so that the reliability of a product is guaranteed; and furthermore, the device is simple and convenient to operate, and a worker does not need to perform lifting operation for a long time, so that the measurement efficiency is improved.

The invention provides a method for measuring three-dimensional data of an autobody and a chassis based on an optical-electricity encoder. The method for measuring the three-dimensional data of the autobody and the chassis based on the optical-electricity encoder is designed to solve the problem that the current mechanical or electronic type measuring method is inconvenient to use and to improve use convenience and measuring efficiency. According to the technical scheme, the method for measuring the three-dimensional data of the autobody and the chassis based on the optical-electricity encoder is characterized in that a measuring arm is composed of a plurality of joints which are connected with one another, wherein a first joint (1), a second joint (2), a third joint (3) and a fourth joint (4) are in the same plane, the fourth joint (4) is perpendicular to the third joint (3), a fifth joint (5) rotates in the plane which is perpendicular to the fourth joint (4), a sixth joint (6) rotates in the plane which is perpendicular to the fifth joint (5), and joint rotating shafts are respectively embedded in the optical-electricity encoder and are used for measuring the rotation angels of the joints. The three-dimensional data of any measurement points of the autobody and the chassis can be measured through angle measurement, coordinate calibration and conversion calculation.

The invention discloses a method for automatically cleaning tools and measuring lengths of the tools on line, and belongs to the technical field of machine tool clamps. A device is additionally arranged on a numerical-control machine tool, so that in a using process, the numerical-control machine tool can be matched with existing tools of a tool magazine to be equipped with all tools to start processing a part after programming is completed once workpieces are clamped; and a tool setting long instruction is added during primary processing. All the tools are cleaned under high pressure to ensure the effect that scrap iron bonding is avoided, so that built-up edge production probability is also reduced. Tool data measurement is accurate, and interferences of artificial factors are avoided. The method is suitable for high-quality efficient production.

The invention provides a bourdon tube torque measuring device and a test method thereof. The bourdon tube torque can be measured through the adjustable torque measuring device, and the bourdon tube torque measuring device comprises a bourdon tube, a base, a rotating table, supporting plates, a clamp, a torque sensor, a rotating shaft, a handle, a clamp seat, a screw, a spring washer and a flat washer; the bottom base is fixed on a vertical table top; the bourdon tube is fixed on the rotating table through the clamp, the rotating table is in bearing fit with the base, the bottom base is respectively connected with the two upper supporting plates and is fixed through the clamp seat, two ends of a torque sensor shaft are connected with the rotating shaft through keys, two ends of the rotating shaft are respectively in bearing fit with the two lower supporting plates, and the upper supporting plates and the lower supporting plates are connected through screws. A top base is connected to one end of the rotating shaft through the horizontal supporting plate, and the other rotating shaft is connected with the handle. According to the invention, a solution is provided for measuring the torques of bourdon tubes with different models and specifications and different angle directions; and data measurement is accurate, operation is easy and convenient, the overall structure is simple, and needed hardware resources are fewer.

The invention discloses a novel dynamic compactor and a composite foundation construction method achieved through the novel dynamic compactor. The novel dynamic compactor comprises a leveling base. A main rod and a hoisting device are arranged on the leveling base. The novel dynamic compactor is of a cylindrical hollow structure. An internally-arranged rammer is arranged in the main rod. The top of the internally-arranged rammer is connected with a mooring rope through a hook device. The mooring rope is wound around a fixed pulley at the top of the main rod to be connected to the hoisting device. The composite foundation construction method includes the steps of arrangement of point locations according to a construction drawing, arrangement of sand wells, dynamic compaction construction in holes, large-energy-level dynamic compaction, full compaction on a whole construction plant and the like. The novel dynamic compactor has the beneficial effects that data are accurately measured, abrasion is small, and service life is long; the internally-arranged rammer in a segmented manner is adopted, and the rammer is long and thin; and the height is increased, and the ramming energy is improved. The construction method has the beneficial effects that construction energy losses are small, and the reinforcement effect is good.

The invention discloses a measuring and cleaning device suitable for microelement detection and belongs to polarographic chemical analysis and measuring equipment. The measuring and cleaning device suitable for the microelement detection comprises a polarogram measuring disc containing measuring cups, a polarogram electrode and a reagent adding device, wherein the polarogram electrode and the reagent adding device are arranged above the polarogram measuring disc. The measuring and cleaning device suitable for the microelement detection is characterized in that a measuring cup A, a measuring cup B and a measuring cup C are tightly arranged on the same arc which takes a center of the polarogram measuring disc as a center, bottoms of the measuring cups respectively pass through an electromagnetic valve A, an electromagnetic valve B and an electromagnetic valve C to be connected with a sealed communication machine through a guide pipe, a pipeline of the bottom of the communication machine passes through an electromagnetic valve of a waste liquid barrel and is connected with the waste liquid barrel, a plunger vacuum pump is connected with the communication machine, and a stepping motor is arranged below the polarogram measuring disc. The measuring and cleaning device achieves the aim that reagent waste liquid and cleaning waste liquid are collected into the waste liquid barrel under a full-sealing state, and overcomes the defects that in the prior art, mercury volatilizing is easily caused by waste liquid to cause polluting, and cleaning is not easily controlled.

The invention discloses a power transmission line optical fiber composite ground wire icing state monitoring system. The system comprises a distributed optical fiber acoustic sensing demodulator whichis used for transmitting an optical pulse and performing phase demodulation on the reflected Rayleigh scattering light; an optical fiber composite ground wire; a distributed optical fiber sensor which is used for monitoring the strain parameters of each measurement point of the optical fiber composite ground wire; a computer system which is used for receiving the strain parameters, sent by the distributed optical fiber acoustic sensing demodulator, of each measurement point of the distributed optical fiber sensor; a power transmission tower. According to the power transmission line optical fiber composite ground wire icing state monitoring system, no power supply unit exists, the service life of a monitoring device is not limited by the severe environments, and the device stability is high; the internal optical fibers of an OPGW optical cable erected on a line are used as the sensing optical fibers; meanwhile, no extra communication cost exists, and the information security is high; light is used as a sensing medium, the electromagnetic interference is resisted, and the data measurement is accurate; the system is long in monitoring distance, and is in distributed monitoring.

The invention discloses a method for determining blending ratios of milk protein modified polyacrylonitrile fibers to wools. The method comprises the steps of: preparing a sample by using a loading appliance for clamping; observing a micro slide body loaded with the sample under a microscope; and respectively recording the total numbers and diameters of milk protein modified polyacrylonitrile fibers and wools in a circular hole, so as to calculate a fiber mass percentage of the components. The method is capable of obtaining results without knowing the content (k value) of milk protein in the milk protein modified polyacrylonitrile fibers, thereby filling the gap of quantitative test method for fiber blending ratios of textiles, providing convenience for third-party laboratories and providing a practicable method for market supervision. The method is a physical test method, so that the whole test process is environment-friendly, harmless and beneficial for the environment and the body health of the inspectors. The test period of the method is about 3 hours, so that the test period is greatly shortened and the detection efficiency is improved.