68results about How to "Improve measurement performance" patented technology

An inspection apparatus comprises an illumination system (12) for illuminating a target structure with illuminating radiation and a collection system for collecting the illuminating radiation after it has been scattered by the target structure. A programmable spatial light modulator (713) comprises an array of movable mirror elements (742) in a conjugate pupil plane (P″) of the illumination system. Between the array of mirror elements and the target a common optical path is defined forming part of the illumination system and the collection system. Each mirror element is movable between a first position where it reflects illuminating radiation into the common optical path and a second position where it reflects radiation from the common optical path toward a detector (19, 23). Various combinations of illumination aperture and collection aperture can be defined without the light losses associated with beam splitters and transmissive spatial light modulators.

Disclosed are a method and apparatus for mapping and receiving resources, as well as a method and apparatus for notifying and acquiring signaling. The method for mapping resources comprises: a base station maps a channel state information reference signal (CSI-RS) onto a plurality of resource elements by means of frequency division multiplexing and / or time division multiplexing and / or code division multiplexing; and / or the base station maps interference measurement resources (IMR) onto a plurality of resource elements by means of frequency division multiplexing and / or time division multiplexing. By virtue of the method and apparatus for mapping and receiving resources, as well as the method and apparatus for notifying and acquiring signaling of the present invention, the effects of improving the measurement performance of a system, ensuring more accurate self-adaptive transmission, and increasing the spectral efficiency of the system are achieved.

the invention relates to a performance testing system and a performance testing method for a portable motor, belongs to the field of performance testing of motors, and aims at solving the problem that a miniature special motor under 2Nm can not be tested by the existing measuring device. The performance testing system comprises a device bracket, a power unit, a frication unit, a measuring unit, an elastic loading unit and an electronic control unit, wherein the device bracket provides support and positioning for the power unit, the frication unit, the elastic loading unit, the pressure measuring unit, and the electronic control unit. The performance testing method comprises the following steps of: carrying out system initialization, starting the tested motor, driving an electronic drive pusher to push by a pusher motor driving circuit so as to carry out loading testing, obtaining corresponding rotation speeds and currents by testing, and drawing a current-torque curve of the tested motor according to all the obtained loading testing, thus obtaining the performance of the tested motor. The system and the method are used for testing the mechanical properties of the miniature special motor under 2Nm.

The invention discloses a combined printing circuit board electric capacitance tomography sensor in the field of design of sensors. The sensor consists of one or more measuring electrode modules; each measuring electrode module is in a three-layer printing circuit board structure and comprises an inner plate, an electrode array plate and an outer plate; the inner plate forms the inner wall of a measuring channel; a substrate made of nonconductive material is arranged in the middle of the electrode array plate; the outer plate forms the outer side of the sensor. The sensor provided by the invention can be arranged on the outer side of a flowing channel on the wall surface of a non-conductor in a conventional manner, and also can be arranged on the inner wall of the flowing channel, so that the material and structure of the original pipeline are not changed; meanwhile, the sensor has the characteristic of thin wall, and the influence on flowing can be reduced to the minimum when the sensor is arranged on the inner wall of the flowing channel.

A difference in the thermal expansion coefficient between a casing and a piezoelectric body is adapted to be reduced by making an adhesive expand and contract, and this can prevent the separation of connection between the casing and the piezoelectric body and the damage of the piezoelectric body. As a result, the ultrasonic vibrator can be used over an extended period of time in an outdoor use environment.

The invention discloses an integrated type capacitance-ultrasound tomography sensor in the technical field of sensor design. The sensor comprises a capacitance tomography sensor and an ultrasound tomography sensor, wherein the capacitance tomography sensor comprises one or more measuring electrode modules, and the ultrasound tomography sensor consists of an ultrasonic transducer array. The sensor surrounds a space to be measured, the measuring part of the capacitance tomography sensor is used for measuring the distribution of dielectric coefficients in the space, and meanwhile, the measuring part of the ultrasound tomography sensor is used for measuring the distribution of ultrasound propagation velocity of a section to be measured. The sensor can provide measured capacitance signals and ultrasound signals at the same time, and the flame distribution image of the space to be measured is reconstructed by virtue of the capacitance signals and the ultrasound signals through a unified image reconstruction algorithm.

The invention provides a mobility cell measurement method for a long term evolution-advanced (LTE-A) system. The method comprises the following steps of: A, performing inter-carrier synchronous transmission of a synchronization signal on more than two component carriers; B, transmitting information about the component carriers capable of realizing carrier aggregation with carriers of a serving cell in the more than two component carriers to user equipment in the serving cell by using high signaling; and C, transmitting mobility joint measurement information to the user equipment in the serving cell for the user equipment to determine the component carriers taking part in mobility joint measurement according to the information about the component carriers and the mobility joint measurement information transmitted by the step B, and performing the mobility joint measurement on the determined component carriers. By the method, the mobility measurement speed can be increased, and the power consumption of the user equipment can be reduced.

The invention discloses an ultraviolet-visible spectrum in situ monitoring device capable of adjusting an optical path and a water quality multi-parameter measuring method. The monitoring device comprises a monitoring part, a light source, a collimating lens, a converging lens, an emitting part, a flat field holographic concave grating and an image detector; a monitoring probe is arranged in waterto be detected; and a second sub-chamber is filled with the water to be detected. The light source is arranged for supplying illumination, the light emitted by the light source is collimated by the collimating lens to become parallel beams, the parallel beams pass through the water to be detected in the second sub-chamber, then are converged by the converging lens and are emitted from emitting slits of the emitting part, the light emitted from the emitting slits is divided through the flat field holographic concave grating and is imaged on a light-sensitive surface of the image detector, theimage detector converts light intensity signals with different wavelengths into electrical signals, namely an ultraviolet-visible spectrum, and a controller acquires and records ultraviolet-visible spectrum signals. The monitoring device is greatly improved in monitoring efficiency and high in measurement accuracy.

The invention discloses a compact sign monitor and a multi-parameter measuring module. The compact sign monitor and the multi-parameter measuring module comprise a parameter panel, a parameter measuring board, a main control board, a pump valve assembly, a display screen, a communication switching board and a main support, wherein the parameter panel, the parameter measuring board, the main control board, the pump valve assembly, the display screen and the communication switching board are fixed on the main support, the parameter measuring board is located at one side of the main support, the main control board and the display screen are located on the other side of the main support, and the relatively heavy pump valve assembly and a battery can be fixed in the middle of the main support. As the parameter measuring board and the main control board are respectively arranged on two sides of the main support and far away from each other in space, space radiation coupling is lowered, stability of parameter measuring is improved, and the gravity center of the whole machine is kept to be stable.

The invention provides a double-visual-angle visual displacement measuring system. The double-visual-angle visual displacement measuring system comprises a base, a sliding rail, clamps, a camera, a beam splitter prism, a convex lens, a photomask, a 90-degree refraction prism, a light source and a target. The sliding rail is vertically mounted on the base; the three clamps are respectively used for clamping the camera, the beam splitter prism and the convex lens; the photomask is placed on the 90-degree refraction prism; after being reflected by the 90-degree refraction prism, horizontal light rays emitted by the light source are projected to the photomask; The target is pasted on the surface of a to-be-measured target. The invention also provides a measuring method, which comprises the following steps of: positioning a light spot, and calculating a homography matrix from a subsequent frame to a reference frame; carrying out homographic transformation to obtain target image coordinates after system instability error correction; and carrying out coordinate transformation to obtain a displacement result. The vision measurement system provided by the invention can simultaneously correct camera movement (camera rotation and translation) and displacement measurement errors caused by temperature change of the image sensor, so that the measurement precision is greatly improved.

The invention relates to a real-time base line and denoising processing method based on distributed sensing and wavelet analyzing technologies. Based on distributed area sensing characteristics of optical fiber or carbon fiber strain sensing, measurement signals are divided into an actual measurement zone related to structural strain parameters and a reference zone related to measurement errors. According to wavelet multilayer decomposition calculation, a plurality of measurement points contained in the actual measurement zone and the reference zone are respectively decomposed into approximation coefficients and detail coefficients. By means of the approximation coefficients of the plurality of measurement points of the reference zone, an error correction module related to system errors in the measurement process is established. By means of the error correction module, the approximation coefficients of the plurality of measurement points of the actual measurement zone are respectively corrected. In addition, reconstruction calculation is carried out with the detail coefficients capable of realizing adaptive filtering, and strain signals of the actual measurement zone after the correction are obtained. According to the invention, measurement errors in the distributed strain measurement process of optical fiber or carbon fiber or the like are substantially improved, the measurement performance of sensors is enhanced, and the purpose of high-accuracy high-precision structural dynamic-static strain measurement is achieved.

In the method for filling a pressure vessel (1), in particular a pressure vessel in airbag systems, with a gas or gas mixture, one or more cryogenically solidified gases and optionally a cryogenically liquefied gas are introduced into a pressure vessel (1).

The invention discloses a visual measuring device and measuring method for a curved plate-rotor gap of an air pre-heater. The visual measuring device comprises a video collecting unit and a light supplementing mechanism that are arranged on a mounting body. In addition, the visual measuring method includes: each visual measuring device is calibrated before usage and a correspondence relationship between a displacement increment and a pixel increment is found out; during the application process, the visual measuring devices are installed, a camera is used for acquiring a dual-line laser image of a target area and transmits the image to an image processor, the image processor feeds back a gap value obtained by processing to a video monitoring unit, and the gap value is monitored in real time; and when the gap value exceeds a normal range, the system carries out alarming automatically for warning, so that the operator is able to adjust the arc plate position timely based on the monitoringpicture. According to the invention, the gap picture and the gap size information can be observed in real time and thus the operator can adjust the gap between the arc plate and the side of the rotorof the air pre-heater conveniently, so that the operating efficiency of the set is improved and the maintenance and replacement become convenient.

The invention relates to the technical field of optical absorption, and provides a preparation method of a foamed ceramic material, and the prepared foamed ceramic material and applications thereof. The preparation method provided by the invention comprises the steps of foam pretreatment, slurry preparation, slurry coating, sintering and the like. According to the invention, the foamed ceramic material with high reflectivity and adjustable porosity is sintered by taking polyurethane foam as a skeleton, so that the effect of remarkably increasing an equivalent optical path with a small volume can be realized so as to achieve the precise meadurement of the infiltrated atmosphere; and when the foamed ceramic material is used for preparing an optical absorption cell in an absorption spectrum analysis instrument, the technical effects of remarkably increasing a laser optical path and enhancing the laser signal transmittance can be achieved with low production cost, so that good measurementperformance is realized.

The invention relates to a coating thickness measuring probe. The probe comprises a probe contact point, a probe shell end face, a probe shell, a wiring terminal of a Hall element, an opening of a rear end cover of the probe shell, a permanent magnet, and the Hall element, wherein the probe shell is a round pipe with the rear end cover; the rear end cover of the round pipe is provided with the opening; the wiring terminal of the Hall element passes through the opening of the rear end cover of the round pipe; the probe shell end face is connected with the probe shell; the probe contact point is fixed in the center of the probe shell end face; the Hall element is fixed on the probe shell end face; and the permanent magnet is fixed on the Hall element. A coating thickness measuring instrument using the probe can be applied to the coating thickness detection of various products in various industries, particularly coating thickness measurement in the coating industry, the automobile painting industry and the like.

A pressure sensor made of semiconductor material, the sensor comprising a box defining a housing under a secondary vacuum, at least one resonator received in the housing and suspended by flexible beams from at least one elastically deformable diaphragm closing the housing that also contains means for exciting the resonator in order to set the resonator into vibration and detector means for detecting a vibration frequency of the resonator. The detector means comprise at least a first suspended piezoresistive strain gauge having one end secured to one of the beams and one end secured to the diaphragm. The resonator and the first strain gauge are arranged to form zones of doping that are substantially identical in kind and in concentration.

The invention discloses a manufacturing method of a flexible temperature sensor, relates to the technical field of flexible sensors, and aims to solve the technical problems of relatively large hysteresis and incapability of achieving high performance generally caused by incapability of high-temperature annealing in a preparation process of an existing flexible temperature sensor. According to thetechnical scheme, the method comprises the following steps of cleaning a hard substrate, performing photoetching forming, depositing a sacrificial layer and a metal layer, removing photoresist, performing high-temperature annealing, manufacturing a flexible substrate, and etching the sacrificial layer. The flexible temperature sensor can be obtained; the preparation method is suitable for the flexible wearable material sensitive to the temperature; the prepared flexible temperature sensor has both flexibility and strength, and the metal temperature-sensitive resistor is firstly manufactured on the rigid substrate, so that high-temperature annealing is carried out, the hardness of the metal temperature-sensitive resistor is improved, the residual stress is reduced, the problem of large hysteresis of the flexible sensor is solved, the metal structure is more stable, the structure defects are eliminated, and the overall performance of the flexible temperature sensor is improved.

The invention provides a shaft rotating speed precision measuring system in a full rotating speed. The measuring system comprises a measuring device, a wire collector, a device main shaft, a couplingand a signal processing module, the measuring device and the wire collector are coaxially fixed to the device main shaft, an output terminal of the wire collector is connected with the signal processing module, the device main shaft is connected with a rotating shaft through the coupling, the device main shaft and the measuring device and the wire collector fixed to the device main shaft are driven to move in the same rotating speed during full-rotating-speed rotation of the rotating shaft, the measuring device converts the measured rotating speed to an analog quantity voltage signal for output, the voltage signal is acquired by the wire collector, and the signal processing module converts the acquired voltage signal to a corresponding measurement rotating speed and displays the measurement rotating speed. According to the system, a shaft rotating speed precision measuring device, method and system in a full rotating speed is provided based on the centrifugal force effect and the piezoelectric effect, the structure of the device is simple, the method is concise and clear, the system design is reasonable, and good measuring performance is achieved for the rotating speed of the rotating shaft in the full rotating speed.

The invention relates to a method for detecting an electromagnetic radiation bioluminescence effect in real time, which comprises the following steps of: arranging a microwave antenna in a dark chamber of a luminescence instrument to make electromagnetic radiation energy directly and closely acted on a biological sample in the dark chamber, and detecting change information of bioluminescence in real time when electromagnetic radiation acts on the biological sample. The irradiation distance is controlled by an organic glass gasket, and an electromagnetic wave absorbing material is filled in the bin of the dark chamber to prevent the scattering effect of electromagnetic waves. The measurable biological sample comprises a biological tissue sample, a cell and subcell sample, a biological macromolecular sample and a small-volume animal sample. By the method, a new technical method and a new analysis index can be provided for researching an electromagnetic radiation biological effect mechanism.

The invention provides an intelligent fiber grating goniometer based on the 3D printing technology. The intelligent fiber grating goniometer comprises a sensor back plate, wherein the sensor back plate is provided with a bearing capable of realizing free rolling and two sensor fixing columns, the two sensor fixing columns are symmetrically arranged at two sides of a lower portion of the bearing, an upper end of a swinging rod is connected with the bearing, after two FBG sensors with different wavelengths are pre-pulled, one end is fixed at the top portion of the bearing, the other end is fixedat the two sensor fixing columns, the induction portion of the FBG sensor is arranged between the sensor fixing columns and the bearing, and a cable of the FBG sensor is connected with a computer acquisition device and a broadband light source through an optical coupler. The intelligent fiber grating goniometer is advantaged in that the Bragg fiber grating FBG sensor technology and the 3D printing technology are integrated, through 3D printing making, high efficiency, low cost, no mechanical process and one-time molding are realized, the intelligent fiber grating goniometer is rapid and convenient, the FBG sensor is further utilized, and high sensitivity, excellent measurement performance and strong anti-electromagnetic interference capability are realized.

A minute particle analyzing device includes: a light source; a first condenser lens for condensing light from the light source to a first end of a multimode optical fiber; a second condenser lens for condensing the light emerging from a second end of the multimode optical fiber to a minute particle; and a detector for detecting light generated from the minute particle by the application of the light from the light source.

The invention relates to the technical field of semiconductor preparation, in particular to a temperature and pressure composite sensor which comprises a pressure sensitive structure and a temperaturesensitive structure. The pressure sensitive structure comprises a metal electrode and a first substrate, a piezoresistive structure is arranged at the joint of the front surface of the first substrate and the metal electrode, and a back cavity structure is formed in the back surface of the first substrate. The temperature sensitive structure comprises a second substrate and a metal resistor, a through hole is formed in the middle of the second substrate, the metal resistor is arranged around the through hole, and the surface, with the metal resistor, of the second substrate is connected withthe back surface of the first substrate. The temperature sensitive structure and the pressure sensitive structure are connected in an up-and-down stacking mode, so that the pressure sensitive structure is isolated from the complex external environment, contact channels between a measured medium and the sensitive structures are guaranteed, meanwhile, temperature in-situ measurement is achieved, temperature drift compensation of a pressure sensor is facilitated, and the measurement performance is improved.

The invention relates to a radio echo signal simulation system adopting an optical fiber to reduce an error. A technology is applied to an aircraft ground semi-physical simulation test, can simulate an echo signal of a radio altimeter more really, and guarantees successful completion of the semi-physical simulation test. The radio echo signal simulation system adopting the optical fiber to reduce the error is characterized in that a frequency modulated continuous wave signal is transmitted to an optical sender; the optical sender is connected with the optical fiber; the optical fiber is connected with an optical receiver; and the optical receiver is connected with a power divider. The radio echo signal simulation system is good in universality; simulation of a multi-model radio altitude echo signal can be achieved in the aircraft ground test; and echo signal simulation of a frequency modulated continuous wave is more real and credible.

The invention relates to the technical field of sensing and self-sensing and particularly relates to a modified carbon fiber strain sensor device and a preparation method thereof. The device includesa modified carbon fiber strain sensing core wire and a foil signal demodulation component. The preparation method comprises the following steps of placing a carbon fiber bundle in a pre-tensioning environment within 300-1000 mu epsilon, applying pre-impregnation linearizing processing on the carbon fiber bundle, applying secondary high-stress tension to the linearized carbon fiber bundle for preliminary molding, performing later maintenance on the initially molded carbon fiber bundle until complete formation, and installing a foil-type signal demodulation component printed by a flexible circuit board to obtain the modified carbon fiber sensing core wire. The invention has the characteristics of superior use performance, high precision, good dynamic response and stable measurement performance and is suitable for a continuous monitoring project in a harsh environment.

The invention relates to a temperature regulating device for a photovoltaic polycrystalline silicon ingot casting furnace, belonging to the technical field of automatic temperature control of the photovoltaic polycrystalline silicon ingot casting furnace. The device comprises a temperature control thermoelectric couple mounted on the photovoltaic polycrystalline silicon ingot casting furnace, and an optical pyrometer, a main controller, an analog quantity output module, a power controller and an alternating current power source which are arranged on the photovoltaic polycrystalline silicon ingot casting furnace, wherein the temperature output ends of the temperature control thermoelectric couple and the optical pyrometer are respectively connected with the input end of the main controller; the output end of the main controller is connected with the input end of the power controller via the analog quantity output module; the output end of the power controller is connected with a heater of the photovoltaic polycrystalline silicon ingot casting furnace; and the input end of the alternating current power source is connected with another input end of the power controller. The temperature is controlled by the optical pyrometer and the thermoelectric couple at the same time. The invention has the advantages of convenient operation, reliable temperature control, high precision and the like, and greatly improves the polycrystalline silicon casting quality.

The invention discloses a double-sided solar-cell-module double-sided light receiving device. The device comprises a solar simulator, a double-sided solar cell module, an optical filtering net and a reflecting surface. The reflecting surface comprises two mirrors. The optical filtering net is arranged on one side of the double-sided solar cell module. The solar simulator is arranged in front of the double-sided solar cell module and the optical filtering net. The reflecting surface is arranged behind the double-sided solar cell module and the optical filtering net. Mirror surfaces of the two mirrors are opposite to each other. The two mirrors are arranged so as to form 90 degree. An included angle of the mirrors and the double-sided solar cell module is 45 degree. In the invention, measurement light of the solar simulator is reflected to a back side of the double-sided solar cell module to be measured so as to realize a double-sided light receiving measurement effect. The structure is designed reasonably and a reflection effect is stable. Measurement light of a right side and the back side of the double-sided solar cell module to be measured is generated by a same light source. A spectrum matching degree is high. The device can be used as an additional apparatus of a single light source solar simulator and a solar simulator structure does not need to be reconstructed.

The invention discloses a thermometer bulb fixing structure and a thermometer bulb fixing frame. The thermometer bulb fixing structure comprises the thermometer bulb fixing frame and a fixing frame positioning structure arranged on the outer side of an air conditioner shell, and the thermometer bulb fixing frame is fixedly mounted on the fixing frame positioning structure. The thermometer bulb fixing frame is matched with the fixing frame positioning structure, so that the thermometer bulb fixing structure and the thermometer bulb fixing frame are fixedly mounted on the outer side of the air conditioner shell, the thermometer bulb fixing structure can be firmly fixed, and more accurate and stable measuring effects are achieved.

the invention relates to a performance testing system and a performance testing method for a portable motor, belongs to the field of performance testing of motors, and aims at solving the problem that a miniature special motor under 2Nm can not be tested by the existing measuring device. The performance testing system comprises a device bracket, a power unit, a frication unit, a measuring unit, an elastic loading unit and an electronic control unit, wherein the device bracket provides support and positioning for the power unit, the frication unit, the elastic loading unit, the pressure measuring unit, and the electronic control unit. The performance testing method comprises the following steps of: carrying out system initialization, starting the tested motor, driving an electronic drive pusher to push by a pusher motor driving circuit so as to carry out loading testing, obtaining corresponding rotation speeds and currents by testing, and drawing a current-torque curve of the tested motor according to all the obtained loading testing, thus obtaining the performance of the tested motor. The system and the method are used for testing the mechanical properties of the miniature special motor under 2Nm.

The invention discloses an integrated type capacitance-ultrasound tomography sensor in the technical field of sensor design. The sensor comprises a capacitance tomography sensor and an ultrasound tomography sensor, wherein the capacitance tomography sensor comprises one or more measuring electrode modules, and the ultrasound tomography sensor consists of an ultrasonic transducer array. The sensor surrounds a space to be measured, the measuring part of the capacitance tomography sensor is used for measuring the distribution of dielectric coefficients in the space, and meanwhile, the measuring part of the ultrasound tomography sensor is used for measuring the distribution of ultrasound propagation velocity of a section to be measured. The sensor can provide measured capacitance signals and ultrasound signals at the same time, and the flame distribution image of the space to be measured is reconstructed by virtue of the capacitance signals and the ultrasound signals through a unified image reconstruction algorithm.

The invention provides a measuring system for centrifugal pump flow induced noise. The measuring system for the centrifugal pump flow induced noise is reliable and stable in measuring performance, has completeness and is extensively applied to the field of fluid flow noise measurement. The measuring system for the centrifugal pump flow induced noise comprises a centrifugal pump and a noise signal acquisition system, and is structurally characterized in that one end of the centrifugal pump is connected with a pressure equalizer I which is connected with a cavitation cylinder, the other end of the centrifugal pump is connected with a pressure equalizer II which is connected with a diffusion pipe, the diffusion pipe is connected with a pressure stabilizing cylinder, flowmeters I are arranged in the pressure equalizers, and a butterfly valve I is arranged in the diffusion pipe; a straight pipe section is further connected between the cavitation cylinder and the pressure stabilizing cylinder and is in cross and communicating connection with the pressure equalizers, and a flowmeter II and butterfly valves II are arranged in the straight pipe section; the noise signal acquisition system is connected with the centrifugal pump.