52results about How to "Low external environment requirements" patented technology

The invention provides a device and method for measuring the bending angle of a bent piece. The device comprises a rotation platform, a drive device, an angle sensor, a ranging sensor and a control device, wherein the drive device is mechanically connected with the rotation platform and used for driving the rotation platform to rotate; the angle sensor is used for measuring the rotation angle of the rotation platform; the ranging sensor is fixed on the rotation platform and is used for measuring the distance between the ranging sensor and a first bent part of the bent piece; and the control device is electrically connected with the angle sensor, the ranging sensor and the drive device, and is used for controlling the drive device to drive the rotation platform to rotate in the bending direction of the first bent part according to the distance between the ranging sensor and the first bent part until the distance to the first bent part measured by the ranging sensor is minimal, and at least calculating the bending angle of the bent piece according to the rotation angle sensed by the angle sensor. The device and method provided by the invention have the advantages of simple structureand accurate measurement, and have low requirements for external environment.

The invention relates to a device for measuring parallelism of sight axis and reception axis of a laser range finder based on liquid crystal modulation, which belongs to the technical field of optical precision measurement. The device comprises an off-axis parabolic mirror, a liquid crystal spatial light modulator, an integrating sphere, a visible light source, an optical fiber A, a laser delay module, an optical fiber B and a coupler, wherein the liquid crystal spatial light modulator is disposed on the focal plane of the off-axis parabolic mirror; the liquid crystal spatial light modulator, the integrating sphere, the optical fiber A, the laser delay module, the optical fiber B and the coupler are sequentially disposed behind the focal plane, and the coupler is connected with a laser emitter; and the visible light source is connected with the integrating sphere. The detection device uses the liquid crystal to perform electro-optical modulation to generate surface target for optoelectronic scanning. The invention can be used for rapid detection of the parallelism of sight axis and reception axis of the laser range finder in both indoor and outdoor environments; and has the advantages of high measurement success ratio, high precision and portability.

The invention provides an amplitude phase calibrating device for semi-closed loop coupled phased array channels. Each channel of an active phased array plane is coupled to one waveguide coupler, thereby forming a coupling loop. Two ends of the coupling loop are connected with a signal receiving and transmitting module and a load. When a channel of the active phased array plane transmits an amplitude phase, a transmission system of the active phased array plane transmits a signal, and the signal receiving and transmitting module of the coupling loop receives the signal. When the channel of the active phased array plane receives the amplitude phase, the signal receiving and transmitting module of the coupling loop transmits a signal, and a system of the active phased array plane receives the signal. The transmitted or received amplitude phase information is fed back to a beam control dispatcher of an array phased array radar for amplitude phase calibration. The device not only can be used for the amplitude phase calibration of a phased array before assembly, also can be used for channel detection and amplitude phase calibration after assembly, enables the waveform design of the phased array to be more accurate, and enables the performance of the array phased array radar to be better.

The invention discloses a method for rapidly processing a graphical surface of an ultralong grating ruler rolling die. The method comprises the following steps: 1) selecting a rolling die; 2) cleaning the rolling die; 3) carrying out gluing on the surface of the rolling die; 4) carrying out pre-baking treatment on the rolling die; 5) fixing the rolling die; 6) selecting and adjusting a mask; and 7) carrying out exposure. According to the invention, through adopting a rotational exposure technique for exposure splicing, a graph of a grating microstructure on the mask is transferred to a photoresist on the surface layer of the rolling die, and after an operation of development is performed, a graphical grating-structure masking layer is formed on the surface of the rolling die; through using an etching or electroforming method, the graphical masking layer is copied to the surface of the rolling die; and through the application of the die, the grating microstructure on the surface of the die can be continuously copied to a grating ruler blank by using a rolled printing or inverted rolled printing method so as to realize the continuous manufacturing of an ultralong grating ruler. The method has low requirements on the external environment and is high in production efficiency, thereby effectively reducing the manufacturing cost of the grating rule.

The invention provides a moving track recording system and method based on an intelligent terminal. The system comprises the intelligent terminal, a direction sensing module, a step counting module and an air pressure module. The intelligent terminal includes a processing module. The direction sensing module, the step counting module and the air pressure module are all placed on the intelligent terminal. The direction sensing module is used for acquiring an angle change value, in the horizontal direction, of an object. The step counting module is used for acquiring a distance value of moving of the object. The air pressure module is used for acquiring a height change value, in the vertical direction, of the object. The processing module is used for figuring out the moving track of the object according to the data acquired by the direction sensing module, the step counting module and the air pressure module. According to the moving track recording system and method based on the intelligent terminal, three-dimensional recording and crossing real-time marking are achieved at places where no GPS signal exists, a mobile network signal cannot be found, and no WiFi signal exists; besides, no external signal needs to be provided for assistance, and therefore practicability is high.

The invention discloses a method and system for measuring a noise frequency response function. The method is used for testing the sound pressures at the inlet and outlet of a tested part and performing the ratio operation on the sound pressures so as to acquire a frequency response function curve of the tested part, thereby showing the noise feature of the tested part based on the frequency response function curve. The measuring system comprises the tested part, a measuring device used for measuring noise signals, a noise signal source and a tail pipe, wherein the noise signal source and the tail pipe are respectively arranged at two ends of the tested part; the measuring device used for measuring the noise signals comprises a first microphone arranged at the outlet of the noise signal source and a second microphone arranged on the tail pipe; and the output signals of the first and second microphones are connected to a noise data processing system. The measuring method provided by the invention is reasonable, simple and convenient, and high in measuring efficiency. The measurement in an anechoic chamber is not required, the demand on the external environment is lower, and the experimental cost is low. The adopted device is simple in structure and convenient to operate. The development period of parts can be shortened and the development cost can be saved. The method and system provided by the invention are suitable for noise measurement on parts of air-intake exhaust systems of various cars.

The invention discloses an optical interferometer for detecting the outer arc surface of an annular guide rail. A condenser convex lens is positioned between a laser and a collimating convex lens, and the focus of the condenser convex lens is coincided with the focus of the collimating convex lens. A beam splitter is positioned between the condenser convex lens and the collimating convex lens and is used for dividing a light ray from the collimating convex lens into a first light beam and a second light beam, the surface, which is opposite to the collimating convex lens, of a reference lens is a convex surface, and the surface, which is back-to-back with the convex surface, of the reference lens is a standard reference surface; an annular reflecting slope which is arranged in the middle of an annular slope reflector is arranged in the peripheral direction and is arranged on the inner side, the annular guide rail to be detected is positioned in the annular slope reflector, a rotating axle of the annular slope reflector is coincided with the respective axes of the annular guide rail and the reference lens, and the annular guide rail is arranged outside the focus of the reference lens. All the stereoscopic appearance information of the outer arc surface of the annular guide rail can be obtained in a one-time manner, and meanwhile, the test efficiency, accuracy and reliability are greatly improved.

The invention relates to a preparation method of a highly dispersed silicon dioxide microsphere with a controllable particle size. The preparation method comprises the following steps: (1) evenly mixing ethyl ortho-silicate and anhydrous ethanol; (2) dissolving inorganic salts into a mixed solution of ammonia water, anhydrous ethanol, and deionized water, wherein silicon dioxide microspheres with different particle sizes can be obtained according to the species and addition amounts of inorganic salts; and (3) stirring the solution obtained in the step (2) at a high speed, adding the solution obtained in the step (1) into the solution obtained in the step (2), reducing the stirring speed after the solutions are evenly mixed; two hours after reactions, carrying out centrifugal separation, and drying to obtain the silicon dioxide microsphere. The adopted equipment is simple, the operation is convenient, the repeatability is high, and the requirements on external environment are low. The particle size of the microsphere can be precisely controlled, during the preparation process of highly dispersed silicon dioxide microsphere. The reaction time is not changed. The prepared silicon dioxide microsphere has good dispersibility without grafting modification.

A method for preparing 2D grating of polymer / liquid crystal includes mixing light sensitive monomer with liquid crystal then injecting them in liquid crystal cell with two glass base plates, setting said cell according to designed angle at plate of two ¿C beam laser interference to carry out primary exposure to mixture in cell, rotating cell to be required angle to carry out secondary exposure for obtaining cross and periodic polymer layer surface on two directions to form tunable 2D grating of polymer / liquid crystal , hiving tuning ability on 2D direction by prepared grating under electric field action.

The invention discloses a digital Mohr phase shifting interference surface shape measurement method based on a region location fitting algorithm. The method comprises the following steps: establishinga virtual interferometer, acquiring an ideal system residual wavefront on an image surface of the virtual interferometer, and pre-marking a solving error region; acquiring a single-breadth actual interferogram in an actual interferometer; solving a surface shape error by using a digital Mohr phase shifting interference method to obtain the surface shape error with the solving error region; selecting data in a solving correctness region for fitting of the surface shape error to obtain a fitting coefficient; and reconstructing the surface shape error by the fitting coefficient to finally obtaina surface shape error result without the solving error region. The digital Mohr phase shifting interference surface shape measurement method solves the problem of a solving error occurring at a largeresidual aberration wavefront caused by the adoption of the digital Mohr phase shifting interference method; the measurement dynamic range of the digital Mohr phase shifting method is extended to beequivalent to that of a traditional phase shifting method; and meanwhile, the real-time, anti-shock and high-precision advantages of the original digital Mohr phase shifting interference method are maintained.

The invention provides a counting method and device based on windows and multi-class incremental learning, and the method and device make the most of the characteristic that the shape of a target is regular, build the direct relation between pixels and the number, reduce the accumulative errors, achieve the quick counting, allow objects to be adhered, and neglect the non-uniform density and quality factors. In order to solve a problem that the limit of a shooting angle enables the pixels of each region of a target image to have errors during the image collection, the method and device enable arange to be divided into regions through windows, and perform the independent counting through each window, so as to reduce errors. The device employs a camera obscura for avoiding the interference caused by an external light source, and is very low in requirements on the external environment. A multi-window template is used for the dividing of a counting region, and avoids the rolling of a target object and the adhering of the adjacent windows. The method and device achieve the high-accuracy quick counting of regular objects which are similar to an industrial sealed felt, are light in weight, are small in size and are not uniform in density.

The present invention provides a wave energy power generation device and a power generation method. The wave energy power generation device comprises a floating body, a power generation box, power generation array polar plates and an electric energy collecting element; the power generation array pore plates are arranged in the power generation box; the power generation array polar plates comprisea plurality of copper plates and copper columns which are arranged in parallel at intervals; the outer wall of the power generation box is provided with the floating body; the copper plates partiallyimmersed in sea water and the copper columns always immersed in sea water form an array; the power generation box floats on the sea surface through the floating body; and when the power generation boxswings with waves, the areas, wetted by seawater, of the copper plates used as electrodes changes, and thus double electrode layer charge and discharge current is generated and transmitted to an electric energy storage element for storage and output. According to the technical scheme, the problems that in conventional wave energy power generation technologies, moving parts need to be used, low-grade wave energy cannot be collected, and the development cost is high are solved.

The invention discloses a quick repairing material for magnesium phosphate cement and a preparation method thereof. The quick repairing material for magnesium phosphate cement, as a composite, is mainly made from, by weight, 25 parts of magnesium oxide, 15-20 parts of monopotassium phosphate, 0.5-1.5 parts of ethylenediamine tetraacetic acid dipotassium salt dihydrate, and 5-10 parts of water. Theethylenediamine tetraacetic acid dipotassium salt dihydrate is used herein as a retardant to replace borax used in the traditional magnesium phosphate cement. The quick repairing material has good retarding effect; setting time of the magnesium phosphate repairing system is greatly extended; the magnesium phosphate repairing system ensures early strength of a magnesium phosphate cement sample, and late strength of the magnesium phosphate repairing system is improved to certain extent.

The invention discloses a method for measuring particle size and gradation of mixed sand based on an auto-correlation algorithm. The method comprises three steps: measuring the mean particle size of multiple groups of the sand, creating a calibration chart, and obtaining the particle size and the gradation of the mixed sand. An image of uniform sand is photographed through a digital camera, a correlation curve is drawn through the auto-correlation algorithm, the mean particle size is calculated according to the rise of the correlation curve, and a calibration chart of the mixed sand is created; a correlation representative curve of the mixed sand is created through the auto-correlation algorithm and added to the calibration chart, an area rate of various parts of the uniform sand is solved by nonlinear programming, the area rate is conversed to a mass rate so as to obtain the gradation, the mean particle size is obtained after calculating, and a mass cumulative curve and a mass distribution curve are drawn to obtain the median particle size. By using the method for measuring the particle size and the gradation of the mixed sand based on the auto-correlation algorithm, field and on-site real-time measurements are realized, and accuracy measurement on the particle size and the gradation of the mixed sand is realized through universal available equipment.

The invention discloses an online detecting system for laser impact processing based on workpiece vibrating frequency. The online detecting system comprises a delay system, a control and vibration sensing system, wherein the delay system comprises an optical trigger and a delay; the optical trigger generates a pulse signal and sends the generated pulse signal to the delay; the pulse signal of the optical trigger is used as a trigger pulse signal of the vibration sensor for controlling a time quantum of the vibration sensor; the control and vibration sensing system comprises the vibration sensor, a computer, an automatic controller and a laser unit; the vibration sensor is used for acquiring a target material vibration signal; by virtue of A / D conversion, a digital signal is transmitted to the computer; and the digital signal is compared with vibration frequency during normal impact in a database to judge, and the signal is transmitted to the automatic controller to regulate power of the laser unit. The online detecting and correcting system can realize online detection and automatic correction for laser impact, so that impact speed is increased and impact efficiency is improved; and the online detecting and correcting system is low in requirement on an external environment, low in cost, stable and reliable.

The invention discloses a castable material used for rapidly restoring city bridge expansion joint concrete and a preparation method thereof, which relates to the field of a novel pavement material. Each cubic meter of the castable material comprises the following raw materials by content ratio: micro steel fiber accounting for 5-15% of mass of cement, 900-1150 kg of a coarse aggregate, 550-800 kgof a fine aggregate, 450-500 kg of cement, micro silicon powder accounting for 6-12% of mass of the cement, iron black powder accounting for 4-8% of mass of the cement, 100-160 kg of water, a water reducer accounting for 1.0-1.6% of mass of the cement, an expanding agent accounting for 5-10% of mass of the cement, and a polymer emulsion accounting for 6-15% of mass of the cement. The castable material can satisfy the requirements of rapid opening to traffic, high early strength, good endurance, good cohesive property with the original concrete, and small aberration with the bridge asphalt concrete.

The invention discloses a test system for MTF and anti-dispersion test of a visible light detector, which relates to the technical field of optical system image detectors, solves the technical requirements of the existing MTF test system for highly integrated automation, and comprises a darkroom, an optical imaging system, a mobile platform system and a display control terminal system. The optical imaging system and the mobile platform system are both located in the darkroom and are both connected with the display control terminal system; the optical imaging system can image the test target to the to-be-tested visible light detector; the mobile platform system can move the to-be-tested visible light detector placed on the mobile platform system so as to realize imaging of a test target to the visible light detector; the display control terminal system can control the optical imaging system and the mobile platform system to work, can receive image data of the to-be-tested visible light detector, and can calculate the MTF and anti-dispersion capability of the tested visible light detector. Detection precision and multiple functions are guaranteed, the size is reduced, and the requirement for the external environment is not high.

The invention provides a system for preparing a colloidal crystal and a method for preparing the colloidal crystal and belongs to the field of preparation methods of colloidal crystals. The system comprises a microsphere injection system, an infrared wavelength heat source, a metal frame, a sample groove, a metal platform, a threaded shaft, a metal movement module, a polyfluortetraethylene plate and a drive motor, wherein the drive motor is arranged at the left end of the metal frame, the threaded shaft is connected to the drive motor, the metal movement module is sleeved on the threaded shaft, the metal movement module is connected to the metal platform, the sample groove is formed in the metal platform, the polyfluortetraethylene plate is fixed to the upper end of the metal frame and is in contact with the sample groove, the drive motor rotates to drive the threaded shaft so as to drive the metal movement module to move right. The invention also provides a method of preparing the colloidal crystal; by virtue of the method, single-particle-size and multi-particle-size colloidal crystal templates can be assembled within a relatively short time range, and the obtained colloidal crystal has controllable thickness and is ordered in a large area.

The invention discloses an ecotype-imitating breeding system for andrias davidianus, belonging to the technical field of aquaculture. According to the invention, an ecological breeding pond is dug ina selected aquaculture base, and an ecotype-imitating breeding system is established; and by utilization of the combined action of a protection system, an industrial control system and a plurality ofecotype-imitating breeding units of the ecotype-imitating breeding system, system environment influence factors, cave environment factors and water environment factors in the breeding process are manually adjusted in real time, and the purpose that the andrias davidianus grows in a near-wild environment state is achieved, so green and healthy commercial andrias davidianus and breeding andrias davidianus with sufficiently mature gonad are produced, and a large-scale ecological healthy breeding mode of the andrias davidianus is realized. The yield of the commercial andrias davidianus bred by using the ecotype-imitating breeding system provided by the invention is increased by 20%; the proportion of the breeding andrias davidianus with sufficiently mature gonad in the breeding andrias davidianus is about 90%; and the problems of a conventional andrias davidianus breeding technology are effectively solved.

The invention discloses a dismounting and mounting machine for a prefabricated box culvert mould core. The dismounting and mounting machine is composed of hydraulic cylinders, a hydraulic station, a multi-way valve, an upper vehicle frame, upper vehicle tracks, upper vehicle wheels, upper vehicle wheel driving motors, a lower vehicle frame, lower vehicle tracks, lower vehicle wheels and lower vehicle wheel driving motors, wherein the four hydraulic cylinders are provided and are fixedly arranged at two sides of the upper vehicle frame; the multi-way valve and the hydraulic station are arranged on the upper vehicle frame; the multi-way valve is connected between the hydraulic station and the hydraulic cylinders through an oil transmission pipeline; the upper vehicle frame, the upper vehicle tracks, the upper vehicle wheels and the upper vehicle wheel driving motors form an upper sliding mechanism; the lower vehicle frame, the lower vehicle tracks, the lower vehicle wheels and the lower vehicle wheel driving motors form a lower siding mechanism; and the upper sliding mechanism is parallel to the lower sliding mechanism, and the connecting way of the upper sliding mechanism is similar to that of the lower sliding mechanism. The dismounting and mounting machine for the prefabricated box culvert mould core can be used for self-loading and self-unloading a box culvert mould core, loading and unloading by using a crane are not needed, and transporting by a fork lift truck is not needed, so that the loading and unloading expenses are greatly reduced; and when the mould core is removed, the dismounting and mounting machine is high in precision, good in stability, free of deflection and flexible in operation.

The invention discloses a yaw control method for a wind driven generator. At least two yaw driving devices driving yaw of the wind driven generator are arranged. The number of the started yaw driving devices is controlled according to the air speed of a wind field; the number of the started yaw driving devices is controlled to be increased while the air speed of the wind field is increased; and the number of the started yaw driving devices is controlled to be decreased while the air speed of the wind field is decreased. The invention further discloses a yaw hydraulic control system of the wind driven generator. The yaw control method and the aw hydraulic control system of the wind driven generator are achieved on the basis of the yaw driving force needed by loads. Thus, the wind field adaptability is high, real-time wind alignment can be achieved, yaw errors are small, maintainability is good, manufacturing cost is low, and the requirement for an external environment is low.

The invention discloses an optical interferometer used for detecting the inner arc surface of an annular guide rail. The inner arc surface is located on the inner side or the outer side in the circumferential direction of the annular guide rail, a condensation convex lens of the inner arc surface is located between a laser and a collimation convex lens, and the focus of the condensation convex lens and the focus of the collimation convex lens coincide; a beam splitter located between the condensation convex lens and the collimation convex lens is used for dividing light of an auto-collimation convex lens into a first light beam and a second light beam; a reference lens is located on one side, back to the beam splitter, of the collimation convex lens, the surface, facing the collimation convex lens, of the reference lens is a convex surface, and the surface, back to the convex surface, of the reference lens is a standard spherical surface; a conical reflector is located in the annular guide rail to be detected, and a rotary shaft of the conical reflector, the axis of the annular guide rail and the axis of the reference lens coincide. According to the optical interferometer, feature information of the inner arc surface in the whole stereoscopic annular guide rail can be obtained at a time, and test efficiency, accuracy and reliability are also greatly improved.

The invention discloses an MR-based product display implementation system and an MR-based product display implementation method, belongs to the field of mixed reality application, and aims to solve the technical problem of how to realize product display based on MR technology. The MR-based product display implementation system comprises a scanning module used for collecting the environment ground;an environment recognition module which is used for recognizing and optimizing the environment ground based on a plane scanning technology; a 3D model construction module which is used for extractingdisplay information based on product configuration, product characteristics and product prices involved in the display requirements, and realizing 3D entity models, characters, pictures, videos, audios, actions and special effects required by MR through a 3D model making tool in combination with art resources; a virtual-real combination module which is used for obtaining an instantiated 3D solidmodel; and an interaction module which is used for interacting with a user in the form of a display interface, selecting a product through the display interface and displaying the corresponding instantiated 3D entity model. The implementation method comprises the step of carrying out instantiation display on the product through the above system.

The invention relates to the field of vacuum glass detection, and discloses a vacuum glass heat insulation performance testing device and method, the testing device comprises a control system, a mute room, and a sound emitting box and a sound receiving box which are arranged in the mute room, the sound emitting box is internally provided with a sound generator and a sound receiver I, and the sound receiving box is internally provided with a sound receiver II; the sound emitting box and the sound receiving box are oppositely arranged, openings are formed in the two opposite side walls of the sound emitting box and the sound receiving box, the sound generator, the sound receiver II and the openings are located on the same straight line, and vacuum glass is placed between the openings of the sound emitting box and the sound receiving box; the testing device also comprises a sound emitting box pushing mechnaism and a sound receiving box pushing mechanism; the sound generator, the sound receiver I, the sound receiver II, the sound emitting box pushing mechanism and the sound receiving box pushing mechanism are electrically connected with the control system. Compared with the prior art, when the vacuum glass is detected through the testing device, the requirement for the external environment is low, the detection time is short, and the detection efficiency is greatly improved.

The invention provides a circulating gas supply system for a marshalling operation train in a vacuum environment and the train, the system comprises a pressure sensing unit, a control unit, a normal gas supply assembly, a first emergency gas supply assembly and a second emergency gas supply assembly, the normal gas supply assembly is connected with a first compartment, the first emergency gas supply assembly is selectively connected with the first compartment, the second emergency gas supply assembly is selectively connected with the first compartment or a second compartment, and when the pressure change rate is within a set safety threshold value, the normal gas supply assembly is used for supplying gas to the first compartment; and when the pressure change rate exceeds the set safety threshold value, the first emergency gas supply assembly is used for supplying gas to the first compartment or the first emergency gas supply assembly of the first compartment and the second emergency gas supply assembly of the second compartment are used for supplying gas to the first compartment. By means of the technical scheme, the technical problem that in the prior art, air cannot be circularly supplied to the train in the vacuum environment is solved.