67results 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.

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 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 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.

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 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 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.