527results about How to "Meet measurement needs" patented technology

The invention relates to an attitude testing apparatus and method based on an autocollimator. The apparatus mainly comprises the autocollimator, an optical hexahedron, a double-shaft electronic level meter and a pedestal with a leveling function. The method comprises the following steps: putting the attitude testing apparatus on a firm base, allowing the autocollimator to collimate a reflecting surface of an object, then collimating the optical hexahedron with an autocollimation gyro theodolite and measuring the included angle between the apparatus and a true north azimuth reference; starting the autocollimator for recording and retrieving of continuous data of the attitude of the reflecting surface of the object and starting the double-shaft electronic level meter for recording and retrieving of continuous data of horizontal attitude; and after completion of recording and retrieving of the data, processing the data of the autocollimator and the double-shaft electronic level meter by using a data processing method for the attitude testing apparatus so as to eventually obtain continuous changes of the attitude of the reflecting surface of the object in a geographic coordinate system, thereby meeting demands of continuous absolute measurement.

The invention relates to a device and method for simultaneously measuring permeability coefficient, compressibility coefficient and porosity of rock. The device is composed of a pressure chamber, an upstream inlet, a downstream inlet, a peripheral pressure inlet, an upstream pump, a downstream pump, a peripheral pressure pump, a vacuum pump, a peripheral pressure valve, an upstream needle valve, a downstream needle valve, a vacuum needle valve, a vacuum valve, a separating valve, a vacuum gauge, an upstream pressure gauge, a downstream pressure gauge, a differential pressure gauge, a thermometer and a console. The device is reliable in principle and simple and convenient to operate, is suitable for dynamic measurement of seepage characteristic parameters and change characteristics thereofof rock under complex stress change conditions. By adopting the device, the permeability coefficient, compressibility coefficient and porosity of the rock under the stress coupling action can be simultaneously measured, experiment basis is provided for design, construction and safety evaluation of seepage associated engineering as well as qualitative and quantitative analysis of permeation changecharacteristics and rules of the rock under the complex stress change conditions, and actual engineering requirements are satisfied.

The invention relates to a vibration sensor based on a surface acoustic wave radio frequency identification technology and application for the vibration sensor. The vibration sensor can be used for identifying the identity of a measured object in a radio frequency manner, and can also be used for monitoring whether the vibration acceleration of the measured object exceeds a set threshold value or not and then recording the vibration acceleration of the measured object; a surface acoustic wave device comprises an antenna, a piezoelectric substrate, an interdigital transducer, reflecting gratings and an elastic element; radixes in the reflecting gratings are used for coding radio frequency tags; the 1-3 reflecting gratings are connected with the elastic element, and then a normally open loop is formed; when the vibration acceleration induced by the vibration sensor exceeds the set threshold value, the reflecting gratings, the elastic element and matched networks jointly form a closed loop; and features of echo signals reflected back to a reader are changed, so that the vibration sensor can alarm after the vibration acceleration in a superthreshold is recorded. Compared with the prior art, the vibration sensor has the characteristics that a measuring method is simple, multidimensional and multi-range measurement can be realized, the vibration sensor is wide in application, and the like.

The invention discloses a mechanical type multipoint extensometer, which comprises an orifice reading machine, an orifice reference plate, an indium wire, and an anchoring head for point measurement inside a pore. The orifice reference plate is fixed on the pore wall with an expansion bolt, a pilot pin at the bottom plate of the orifice reading machine is inserted into the locating hole in the orifice reference plate, the orifice reading machine is fixed in the orifice reference plate, one end of the indium wire is fixed on a fastening bolt of anchoring head for point measurement inside a pore, the other end of the indium wire is fixed passed through a center hole of the orifice reference plate and fixed on a conical clip with point measurement marks, and the conical clip with point measurement marks is connected with a conical hanger of the orifice reading machine. The invention has the advantages of simple structure, large measurement range, easy operation, rapid anchoring, and reliable performance; and is suitable for point measurement in a pore with different bore sizes.

The invention provides a wide-range broadband current sensor base on a tunnel magnetic resistance effect, and belongs to the field of sensing measurement. The sensor comprises an open magnet ring, current sensing chips, a compensation coil, a sampling resistor, an instrument amplifier, a zeroing circuit, a current output module and a power supply module; the current sensing chips include a high-sensitivity TMR sensing chip and a low-sensitivity TMR sensing chip, and are provided with two current measuring output points; the open magnet ring sleeves a current carrying lead, so that the current carrying lead penetrates through an inner hole of the open magnet ring; the compensation coil is wound around the open magnet ring; the high-sensitivity TMR sensing chip is arranged in an open air gap position of the open magnet ring; the low-sensitivity TMR sensing chip is arranged outside the open magnet ring; the high-sensitivity TMR sensing chip with other composition parts forms a closed loop structure; and the low-sensitivity TMR sensing chip, the instrument amplifier and the zeroing circuit form an open loop structure. The current sensor has the advantages of being wide in measuring range, wide in frequency band, small in size, high in precision, low in cost, free of intrusion and convenient to install and maintain.

The invention provides a method utilizing a laser displacement sensor to measure speaker parameter and a testing system for realizing the method. The method adopts stepping swept-frequency signals to stimulate a device to be measured, and simultaneously measures displacement response signals of a vibrating diaphragm of the device to be measured and current response signals flowing over the device to be measured. The signals are imported into a linear model and a large signal Volterra model of a speaker, and linear parameters and nonlinear parameters of the speaker are obtained through system identification. As the linear parameters and the nonlinear parameters of the speaker can show operating characteristics of the speaker under different amplitude input, the method can not only be applied to the design verification and the product quality detection of the speaker, but also be applied to the tone quality improvement of the speaker products.

The invention discloses a full-automatic chemiluminiscence tester and belongs to the field of chemiluminiscence testing.The full-automatic chemiluminiscence tester comprises a mechanical arm module, a refrigeration module, a power module, a reagent sample disk, a sampling needle component, a stirring component, a reaction cup frame, an incubation device, a magnetic separation component, a washing station component and a measuring room.Full-automatic management is achieved for mixing, reacting, incubating, magnetic separating, detecting and other procedures of a sample to be tested, the detection efficiency is improved, and operation errors are reduced.

The invention relates to a monocular vision box body volume measuring method based on multi-line structural light image recognition. The monocular vision box body volume measuring method comprises thefollowing steps that (1) a camera is calibrated, and multi-line laser plane parameters are acquired; (2) calculation of mapping of two-dimensional coordinates to three-dimensional spatial coordinatesis conducted; (3) the box edges are detected and the laser central line is extracted by using a deep learning method; and (4) structural light with a well shape, structural light with a dual-parallel-line and structural light with a cross shape are correspondingly used for measuring different box bodies to obtain the volumes of inerratic box bodies. According to the monocular vision box body volume measuring method based on multi-line structural light image recognition, the multi-line structural light (the well shape, the cross shape and the parallel line shape) is casted on the measured boxbody plane, intersection points of the line structural light and the edges of the boxed are detected through imaging processing, the points are converted from the two-dimensional coordinates to three-dimensional spatial coordinates according to a structural light triangulation measuring theory to calculate the lengths, the widths and the heights of the inerratic box bodies, and the volumes are further calculated. According to the monocular vision box body volume measuring method based on multi-line structural light image recognition, the complexity of the algorithm is low, the method can be greatly applied to PC terminals and mobile terminal devices, real-time on-line measuring can be conducted, and the requirement of portability is met.

The application discloses a VFTO measuring system, comprising a voltage sensing unit, a transmission device and a measuring unit. The voltage sensing unit respectively forms a high voltage arm and a lower voltage arm featuring capacitance differential pressure with a load to be tested and a hand window cover plate to be tested by space electric field coupling and induces voltage of the load to betested; and the transmission device is connected between the voltage sensing unit and the measuring device for transmitting voltage the low voltage arm of the voltage sensing unit induces to the measuring device, wherein the voltage sensing unit comprises a GIS shell hand window, a coupling electrode, a medium film, an outgoing line, a build-out resistor, an output interface and a hand window cover plate. In the invention, with shape and area of the coupling electrode and distance of the coupling electrode from a conducting rod adjusted, with material and thickness of the medium film adjustedand with position of the outgoing line adjusted, measurement frequency band bandwidth can be expanded and VFTO measurement requirements can be met.

The invention relates to a sample preparation method of the oxygen content measurement of steels, which comprises sample preparation methods of pipes, sheets and high-hardness steels and can satisfy the requirements on the oxygen content measurement on the steels in a bearing manufacturing enterprise according the technical requirements of products. Especially for thin-wall pipes, thin sheets, high-hardness steels, and other steels, samples can not be manufactured according to rules in a standard, therefore, the oxygen content of steels at key parts of a bearing can not be measured; and the samples can be manufactured by adopting the sample preparation method in the invention, and the oxygen content can also be measured according to procedures, devices, and methods in an GB/T11261-2006 standard. The samples manufactured by using the sample preparation method can not only be used for measuring the steels, but also be used for measuring the oxygen contents of other metals, thereby overcoming limitations of the sample preparation method in the standard, broadening the usable range and ensuring that more steel products can be all subjected to the oxygen content measurement by using the standard method; and the sample preparation method provides reliable basis and guarantees especially for analyzing and searching early failure reasons of bearing products.

A BWP switching method and apparatus, a storage medium, a user equipment, and a base station are provided. The BWP switching method comprising: receiving first configuration information sent by a network, the first configuration information being used for indicating measurement information for measuring an inactive BWP; measuring the non-activated BWP according to the measurement information, so as to obtain channel state information of the non-activated BWP; judging whether the channel state information of the non-activated BWP meets a reporting condition or not; and if the judgment result shows that the channel state information meets the reporting condition, sending the BWP identifier of the non-activated BWP to the network so as to enable the network to switch the BWP. Through the technical scheme provided by the invention, when the BWP is switched by the network, the throughput rate of the user equipment can be ensured not to generate large fluctuation, good spectral efficiency can be obtained, and the satisfaction degree of the user is improved.

The invention discloses a wind tunnel separation simulation experiment system, belongs to the technical field of wind tunnel experiments, and relates to a simulation experiment system suitable for measuring the separation process of an external carried object model in the wind tunnel environment. According to the simulation experiment system, an explosive bolt is matched with a mechanical concentric sliding rail device, acting force is exerted through a feeding assistant device to complete separation between an external carried object and a master, and the separation process is measured through a high-speed visual device. By means of the wind tunnel separation simulation experiment system, the explosive bolt is matched with the mechanical concentric sliding rail device, it is guaranteed that a wind tunnel separation body model separation system is safe and reliable, the high bearing capacity and the rapid triggering capacity are achieved, the feeding assistant device is introduced to exert the adjustable feeding force to the model, the separation initial angle, the separation angle, the separation speed and the separation angular speed of the wind tunnel separation model are controlled, high consistency of the separation model separation process and the true machine separation process is guaranteed, and the whole separation process parameter measurement requirement is met due to the fact that the binocular high-speed visual device has the advantages of being high in accuracy, high in frequency response and the like.

The invention discloses a laser-induced fluorescence combustion field parameter measuring device which comprises a light source system and a detection system, wherein the light source system comprises a laser (5), an optical fiber coupling lens (1), a plastic optical fiber bundle (2), a spherical lens (3) and a cylindrical lens (4), wherein the optical fiber coupling lens (1), the plastic optical fiber bundle (2), the spherical lens (3) and the cylindrical lens (4) are arranged in the laser transmission direction in sequence; an optical fiber configuration section on the incident end surface of the plastic optical fiber bundle (2) is matched with a light beam section of the laser (5), and the emergent end surface of the plastic optical fiber bundle (2) is configured into a linear shape; and a cylindrical center line of the cylindrical lens (4) is parallel to an optical fiber configuration line on the emergent end surface of the plastic optical fiber bundle (2). The laser-induced fluorescence combustion field parameter measuring device has the benefits that a lamellar light beam with uniform light intensity in an area on the light beam transmission direction is realized, the demands that the combustion flow field two-dimensional parameter measurement is realized by adopting a planar laser-induced technology are satisfied, the combustion flow field parameter measurement under the strong-vibration and strong-noise impact environment are simultaneously satisfied, and the environmental adaptability of the system is improved.

The invention discloses an online monitoring system for the current distribution of an aluminum electrolytic tank, belonging to the technical field of aluminum electrolysis. The online monitoring system for the current distribution of the aluminum electrolytic tank comprises at least one measuring device comprising an isometric pressure drop measurement fork or a magnetic field detection sensor, the isometric pressure drop measurement fork is used for measuring the isometric pressure drop value of an anode guide rod or a cathode steel bar of the aluminum electrolytic tank to be tested, the magnetic field detection sensor converts the magnetic induction intensity around the anode guide rod or the cathode steel bar into a proportional voltage value according to a Hall principle, and the measuring device is sequentially connected with a data processing device, a wireless network and an upper computer. The invention satisfies the measurement requirements under high-temperature high-dust environment with high magnetic field intensity, has high system flexibility, is favorable to far-distance signal transmission and can simultaneously monitor a plurality of aluminum electrolytic tanks.

The invention discloses a method and a device for measuring the pore volume change of a porous medium. The method comprises the following steps of: A, putting a workpiece to be tested into a holder; B, closing an upstream control valve and a vent valve, and opening a communication valve, a downstream control valve and a pressure regulating control valve; C, after the device is positioned in the vacuum state and stable, closing the downstream control valve; D, performing confining pressure stepwise loading/unloading experiments; and E, opening the vent valve, setting a pressure regulating controller to be zero, and finishing the measurement of the pore volume change. The pressure regulating controller mainly comprises a front fixing sleeve, a rear fixing sleeve, a movable sleeve, a sliding head, a sliding block, a screw rod, a rotary head and a rotary rod, wherein the rear fixing sleeve is provided with a main scale; the movable sleeve is provided with a branch scale; and the main scale and the branch scale are used for reading the volume difference. The device is easy to operate, is convenient to read, is stable in performance and reliable in measurement, and is suitable for quick, continuous, accurate and intuitive measurement of wide-range pore volume change of porous media under the condition of complicated stress variation.

An automatic test system for high-altitude electric field radiation sensitiveness is disclosed and relates to the technical field of electromagnetic compatibility testing. The system comprises a large-sized detected member, an emission antenna system, a large power signal simulation system, a high-altitude upgrading platform, a field intensity monitor, an electric field probe and a control computer, wherein the control computer is used for sending control instructions to the large power signal simulation system via a signal interface board, the large power signal simulation system is used for generating small power microwave signals and amplifying the same, large power microwave signals are generated and transmitted to the emission antenna system, the emission antenna system is used for subjecting the coupled large power microwave signals to radiated emission into space, high field intensity electromagnetic wave signals are generated in space, the electric field probe is used for monitoring the high field intensity electromagnetic wave signals generated by the emission antenna system in space in real time, and monitoring results are sent to the control computer via the field intensity detector. The system disclosed in the invention can satisfy electric field sensitivity testing requirements for the large-sized measured member which is less than 18 m in height such as a carrier rocket and the like.

The invention relates to a method for measuring a tooth profile deviation of a gear based on double-side meshing and belongs to a precise measuring technique and the technical field of instrument and mechanical transmission. According to the method, a rack measuring head is adopted for measuring the tooth profile deviation of the to-be-measured gear based on double-side meshing, wherein the rack measuring head only has a tooth and the tooth profile is a straight line. Four tooth sockets of each to-be-measured gear are measured. During the measuring process of each tooth socket, the rack measuring head enters the tooth socket of the to-be-measured gear and is in close contact with left and right tooth surfaces of the to-be-measured gear; the rack measuring head and the tooth socket move in a double-side meshing manner and the position of the rack measuring head is measured and obtained; and lastly, the tooth profile deviation of the to-be-measured gear is solved and obtained through a mathematical model. Specific to the requirement for on-site quick measurement of the gear, the invention provides the method for measuring the tooth profile deviation of the gear through the meshing of the rack measuring head and the to-be-measured gear based on the double-side meshing, so that the tooth profile deviations of the left and right tooth surfaces of the to-be-measured gear are simultaneously obtained through once measurement.

The invention discloses a venturi flow meter for bidirectional flow measurement and a measurement method thereof. A front contracted pipe and a rear expending pipe having the same structure are installed between a stabilization pipe I and a second stabilization pipe II; a throat part is installed between the front contracted pipe and the rear expending pipe; the front contracted pipe and the rear expending pipe are symmetrically installed about a center of their connecting line; and integrated structures are formed by ends which have larger transverse planes connecting with the corresponding stabilization pipe I and second stabilization pipe II; and an integrated structure is formed by ends which have smaller transverse planes connecting to the throat part; the stabilization pipe I, the second stabilization pipe II and the throat part are all provided with pressure measurement connecting pipes; the pressure measurement connecting pipes are respectively communicated with corresponding internals of the stabilization pipe I, the second stabilization pipe II or the throat part; the pressure measurement connecting pipes are connected with valve groups which are connected with intelligent differential pressure transmitters. The flow meter and the method can be directly applied in bidirectional flow measurement of single-phase liquid or single-phase gas in a pipeline for providing real-time and accurate measurement of bidirectional flow; the flow meter has simple structure, good repeatability, high measurement precision and less flow pressure loss.

The invention relates to a dielectric-loaded based ultra wide band compact field feed source. The ultra wide band compact field feed source comprises an improved dielectric-loaded horn antenna (1), a supporting column (2), a flange plate (3) and a wave-absorbing material (4), wherein a ridge waveguide part is matched with a ridge curve of a horn for increasing the thickness of a ridge (5) to the maximum; two semi rigid coaxial cable electric connectors connected by an SMA connector are adopted as feed probes, and the diameter of the cable is less than 2 mm; the two feed probes are perpendicularly mounted, and are corresponding to two polarities of the feed source respectively; the radiation electric field of the feed source antenna can be concentrated to a dielectric region as far as possible by optimizing the shape of the dielectric-loaded material and the relative position of a four-ridge horn antenna for stabilizing the phase center; the supporting column of a certain length is arranged behind the dielectric-loaded horn antenna to enable the dielectric-loaded horn antenna aperture to be far from a feed source bracket; the wave-absorbing material of a specific size is added at the bottom of the supporting column for restraining multiple times of radiation caused by a complex metal structure of the feed source bracket; and the dielectric-loaded based ultra wide band compact field feed source has the outstanding advantages of small size, light quality and low cost.

The invention discloses a method and a device for measuring a breakthrough pressure of a porous medium material. The method comprises the following steps of: A, placing a saturated infiltration phase tested piece into a holder, and loading a confining stress to the tested piece; B, shutting off an upstream emptying valve, a downstream emptying valve and a backpressure emptying valve, and vacuumizing; C, when the device is in a stable vacuum state, making the device pass through an upstream non-infiltration phase injection system and a downstream infiltration phase injection system; and D, simultaneously performing test on the breakthrough pressure and the permeability coefficient. The holder is connected with a confining stress control valve through a pipeline; the upstream is connected with an upstream control valve and an upstream pressure meter through pipelines; the downstream is connected with a downstream control valve, a downstream pressure meter and a backpressure control valve respectively through pipelines; a communicating valve is connected with an upstream non-infiltration phase and a downstream infiltration phase respectively through pipelines; a data acquisition cardis connected with the upstream pressure meter through a data wire. The invention is easy in operation, stable in performance and reliable in measurement, and applicable to simultaneous, quick, efficient and precise measurement of the breakthrough pressure and the permeability coefficient of the porous medium material.

The invention relates to the combustion field and the optical measurement technology and particularly relates to a five-channel adaptive two-dimensional temperature field measurer and a measurement method thereof. A flat light splitter is at the back of a combined lens comprising an industrial endoscope and a collimation objective, a light splitter set is mounted in a light splitting direction of the flat light splitter, a color CCD camera is mounted in another light splitting direction of the flat light splitter, black and white near-infrared CCD cameras are respectively mounted in two light splitting directions of the light splitter set, a light filter is arranged between the light splitter set and the black and white near-infrared CCD cameras, each camera is connected with a synchronization data image acquisition card, and the synchronization data image acquisition card is connected with an image processing system. According to the measurer, a before-the-lens light splitting and black and white CCD imaging measurement mode is employed, a four-channel light splitting and two-CCD-camera measurement mode is employed, an image processing method of image segmentation and partitioned area combination is employed, and measurement precision is improved.

The invention relates to a performance and efficacy testing platform of a heat exchanger. The platform comprises a heat source part, a vapor source part, first and second mixers, an air source part, a shell-and-tube heat exchanger, first and second separators, a shell-and-tube type double-tube heat exchanger testing assembly, a condensation heat exchanger, a boiling heat exchanger, first and second water cooling devices and a steam condenser. The platform can test heat transfer properties and fluid flowing resistances of the shell-and-tube type heat exchanger, the double-tube heat exchangers, the condensation heat exchanger and the boiling heat exchanger respectively, does not occupy much space, reduces the production cost, satisfies practical measurement requirements and has good application and development prospects, and test data is stable and reliable.

The invention relates to the field of plane area measurement technology, in particular to the non-destructive measurement system and method of the plane blade area for a single image. The system comprises: image acquisition unit, image correction unit, blade image division unit, blade area calculation unit. The method includes: the flat blade image which is attached to the demarcating board can be gained from the image acquisition unit; the projective corresponding relationship between the image element and the object can be calculated based on the isonym point of the image and the demarcating board by the image correction unit, the orthographic correction of the image is also done; the image of the blade can be separated from the background by the blade image division unit; the area of the blade image which is after the orthographic correction can be computed based on the projective corresponding relationship by the blade area calculation unit.