317results about How to "Reduce measurement impact" patented technology

The invention relates to a channel quality reporting method and a corresponding device, and is suitable for a wireless communication system adopting multi-point cooperative transmission. The method comprises the following steps that: when receiving a multi-cell cooperative channel quality indicator CQI measurement pilot frequency emitted in cooperative resources and a public pilot frequency of a service cell emitted in bandwidth resources of a whole system by a service cell base station, a terminal in multi-cell cooperation feeds back to the service cell base station the multi-cell comprehensive channel information in the cooperative resources measured according to the CQI measurement pilot frequency and the CQI information of the service cell in non-cooperative resources measured according to the public pilot frequency so as to be used for the service cell base station to allocate cooperative resources and non-cooperative resources in the cooperative transmission for the terminal. The invention can reduce the impact on the terminal channel measurement of the service cell and the cooperative cell, and ensures the accuracy of multi-cell channel quality measurement in the cooperative transmission.

The invention relates to an integrated correcting system and correcting method applied to different active array antennas. The integrated correcting system includes an active array antenna, a high-precision measurement real-time compensation unit, a testing probe, an industrial personal computer, a vector network analysis meter, a RF cable, and a low frequency cable. According to the invention, the integrated correcting system is advantaged by high correcting precision, short correcting time, simplicity and easiness of implementation, strong universality and excellent industrial reliability.

The present invention is multi-parameter comprehensive fiber grating sensing experiment instrument as one kind of physical and detection technology teaching instrument. The instrument includes measuring unit, sensing unit and fiber coupling link. The sensing unit includes frame, equal-thickness isosceles triangle cantilever beam fixed inside the frame, gravitational pendulum fixed to the bottom of the cantilever beam, two fiber gratings with the same parameters adhered symmetrically on two sides of the cantilever beam, micro displacement meter fixed horizontally to one side of the frame, micro obliquity meter fixed vertically on the other side of the frame and electromagnetic coil fixed inside the bottom of the frame. The instrument may be used in detecting current, obliquity, vibration and displacement, performing various fiber experiment, etc. and is suitable for use in relevant teaching experiments.

The invention discloses an interferometric optical fiber sensor based on a pohotonic crystal optical fiber. The pohotonic crystal optical fiber at the middle section is connected with monomode optical fibers at two ends via core shift connecting structures, wherein the diameters of claddings of the monomode optical fibers at two ends are 125 microns, and the diameters of fiber cores are 8.3 microns; the pohotonic crystal optical fiber at the middle section is a PM-125 type pohotonic crystal optical fiber manufactured by the fiberhome telecommunication, the cladding diameter is 125 microns, the diameter of the fiber core is 7 microns, and the length is 5cm, and the section acts as a sensing region. The interferometric optical fiber sensor is not sensitive to temperature, and is relatively high in refractive index, and can act as a refractive index sensor, and meanwhile, influences on refractive index measurement precision caused by the change of temperature can be alleviated. The interferometric optical fiber sensor based on the pohotonic crystal optical fiber is simple in structure, is easy to manufacture, meanwhile can alleviate influences on the single-parameter measurement precision by temperature, is relatively high in practical value, and is suitable for the fields of industrial production, defense-related science and technology, medical treatment, people's livehood and the like.

The invention provides a position measuring device and a position measuring method. The position measuring device comprises a light source module, an illumination module, a projection aperture, a projection raster, a projection imaging module, a detection imaging module, a detection raster and a detection module, wherein after light emitted by the light source module passes through the illumination module, the projection aperture and the projection raster, the projection raster is imaged on an object to be measured by the projection imaging module so as to form a raster image; and the raster image is imaged to the detection raster so as to form a detection image by the detection imaging module; the detection image and the detection raster are overlaid to form a Moire fringe; the Moire fringe is detected by the detection module; and the projection raster is a rough raster. The invention has simple structure and higher sensitivity and measures in a direct way.

The invention discloses a wireless sensor network system based on quantum encryption. The wireless sensor network system comprises a plurality of sensor nodes and a plurality of network relay nodes; each of the sensor nodes includes a first quantum communication system, a first encryption and decryption system, a first wireless communication system, and a first data collection and processing system; each of the network relay nodes includes a second quantum communication system, a second wireless communication system, a second encryption and decryption system, a second data storage and forwarding system, and a key management system. The sensor nodes apply for keys from the network relay nodes in a neighboring area, and quantum communication channels can be established therebetween; for the network relay nodes that are not within the neighboring area, the quantum communication channels cannot be established between the sensor nodes and the network relay nodes; the sensor nodes forward a ciphertext to a target node via the network relay nodes; and the whole sensor network negotiates the keys via the quantum channels, and transmits a stream cipher via wireless communication channels. According to the system disclosed by the invention, the data transmission of the constructed wireless sensor network is secure and reliable.

The invention relates to a convertor station direct current filter differential protection method and device. The convertor station direct current filter differential protection device firstly acquires the current on the high voltage side of a direct current filter and the current on the low voltage side of the direct current filter, calculates the difference value of the currents, and then conducts logical judgment and processing according to protection logic. The convertor station direct current filter differential protection method can judge a failure quickly and accurately, and the risks of protection maloperations or protection failures due to the fact that a current transformer is saturated and measurement distortion occurs are avoided when a failure occurs.

The embodiment of the invention discloses a resource distribution and data processing method and a device thereof. In a time period T, in N groups of time slots configured according to a preset rule, the time slot of sending specific data is determined, wherein the each one of the N groups of time slots comprises M time slots, the M*N time slots are in discrete distribution in the time period T, M and N are integers which are not smaller than 1, the time period T comprises T time slots, since the M*N time slots are in discrete distribution in the time period T, the time slot interval between the time slots in the M*N time slots is large enough, and thus when the specific data is sent in the determined time slot of sending the specific data, the measurement influence of UE and RRM of source cell and target cell service is reduced as much as possible.

The invention discloses a satellite magnetic moment measurement method in the geomagnetic environment magnetic field, which uses the characteristic that the satellite magnetic moment is consistent with the direction of the earth's magnetic field, simplifies the satellite magnetic moment to measure the satellite residual magnetic moment and the satellite magnetic moment, and uses three orthogonal The remanent magnetic moment in the direction is decomposed into the magnetic moment of the equatorial plane and the horizontal plane where the satellite is transposed by 90°. During the measurement, the satellite should not be turned over, and the vertical component of the magnetic induction moment should be separated; the measurement method uses three-component and single-component magnetometers , the magnetic sensor is arranged near the satellite, connected to the magnetometer main box through a 20m signal line, and the analog/digital converter converts the analog quantity into a digital quantity. Through the test software compiled in BC++ language under the Windows interface, the microcomputer has storage measurement functions for data, calculation of magnetic moments, and documentation. The invention has strong versatility and is easy to operate. Due to the short test time, the fluctuation of the environment magnetic field is small, the calculation error of the magnetic moment is also small, and the measurement accuracy reaches 7.5%.

The invention provides a CCD device quantum efficiency measuring device and method. The device comprises a CCD device absolute quantum efficiency measuring apparatus and a CCD device relative quantum efficiency measuring apparatus, the CCD device absolute quantum efficiency measuring apparatus is used for measuring the absolute quantum efficiency of a CCD device on a 632.8 nm wavelength point, and the CCD device relative quantum efficiency measuring apparatus is used for measuring the relative quantum efficiency of the CCD device within the wavelength range from 300 nm to 1100 nm. According to the CCD device quantum efficiency measuring device and method, a 632.8 nm laser is used for emitting light into an integrating sphere to carry out absolute calibration after the light passes through a power stabilizing system, lasers with different levels of output power can be selected according to different CCD devices, the problem that optical power is low is avoided, no light loss is caused, a standard detector directly traces the source to a low-temperature radiometer on the 632.8 nm wavelength point, and therefore the number of intermediate links is reduced, and uncertainty of measurement is improved.

The present invention discloses a fine particle matter measuring device for detecting the content of PM2.5 in the air, the fine particle matter measuring device includes a PM10 collector for collecting an air sample, a PM2.5 cutter for separating fine particulate matters in the air sample, a detecting device for detecting the content of the fine particulate matters in the air sample, and an air pump for stabilizing the air flow, the detecting device comprises a laser light scattering apparatus, a photoemission detector, and a signal processor, the fine particulate matter measuring device is simple, reliable, low in price , and apparatus-saving, and the present invention also discloses a measuring method using the fine particle matter measuring device.

The invention relates to a chemical etching measurement method for optical element sub surface damages, an auxiliary experiment device and a test method. In the chemical etching measurement method, through measuring the roughness of a sample during the etching process, an evolutional relation curve for roughness outlines along with the etching time is drawn, and a sub surface damage depth value isthus obtained. The chemical etching auxiliary device is used to realize etching, cleaning and drying on the optical element, an ultrasonic vibration instrument is added during the cleaning process toassist cleaning, and a hair drier and a motor are added during the drying process to assist drying. The sub surface damage depth can be quickly and accurately measured; a set of etching auxiliary device is designed, the device is simple in operation, high in efficiency and low in danger, sediments generated during the etching process can be effectively reduced, and influences on etching and measurement are greatly reduced.

The invention discloses a method and a device for synthetically measuring the production of engineering machine hydraulic parts. The method constructs the synthesized measuring device and uses routine measuring tools to finish the measurement of various engineering machine hydraulic parts; the synthesized measuring device comprises a platform, an upright post is arranged on the platform, and a movement rest is arranged on the upright post; the upright post is divided into a fixed upright post and a movable upright post, and the movable upright post can move along a guide slot on the platform and is fixed with the platform through a compressing screw nut; and a measuring rod locating component, a vertical locating component and a horizontal locating component that are used for positioning the parts to be measured are further arranged on the synthesized measuring device. The invention can finish various accurate detection of products in all models with only one measuring tool set, can lower the research and development costs and the research and development period of the products, and improves research, development and production efficiency.

The invention provides an ionization absorption spectrum detection device based on a multi-channel electron multiplier; the ionization absorption spectrum detection device includes an ionization chamber for ionizing gas, a golden net, the multi-channel electron multiplier, a voltage increasing and signal acquisition circuit, and a signal processing system; the golden net is arranged in the ionization chamber and arranged for collecting ions generated from ionization in the ionization chamber; the multi-channel electron multiplier is arranged in the ionization chamber, has the position opposite to the position of the golden net so as to form an electric field between the multi-channel electron multiplier and the golden net, receives the ions collected by the golden net through the action of the electric field and outputs a corresponding ion signal; the voltage increasing and signal acquisition circuit is connected to the multi-channel electron multiplier and arranged for providing voltage for the multi-channel electron multiplier and acquiring and outputting the ion signal; the signal processing system is arranged for receiving the ion signal and acquiring a corresponding ionization absorption spectrum according to the ion signal. The ionization absorption spectrum detection device can improve the accuracy degree of measurement beam line energy resolution ratio and reduce the influence of gas collision broadening on a final result.

The invention discloses a method for measuring transmission of an interference-insensitive terahertz wave, which is realized by adopting a terahertz wave beam splitter and two same detection systems. A terahertz wave beam is split into two beams by using the beam splitter, one beam of the terahertz wave beam is used for measuring a sample to be tested to obtain a sample signal, and the other beamof the terahertz wave beam is used for measuring a reference signal to obtain a reference signal, two sample transmissivities obtained through measurement are deducted to obtain a relative transmissivity of the sample to be tested. The selected reference sample and the sample to be tested have same interference characteristics, and floatation caused by an interference effect is effectively reduced. According to the method, the influence of the interference effect of parallel flat samples to the transmission measurement of terahertz waves can be effectively reduced, and measurement errors caused by the power fluctuation of a terahertz wave radiation source is eliminated. The invention has higher measurement sensitivity and stability and is suitable for fields such as micro and trace detection, and the like.

The invention provides a method for testing the interfacial fracture toughness of a second-generation high-temperature superconducting strip. The method comprises the steps of: (1), solidifying an enhancement layer, the thickness of which is much greater than the superconducting strip, at two sides of the superconducting strip, so that a composite beam structure is formed and used as a sample to be tested; (2), coating speckles at the narrow side of the sample in the length direction; (3), cutting the initial crack at one end of the superconducting strip of the sample, then, loading the sampleon a stretcher, and aligning a CCD camera to one side of the sample, on which the speckles are coated; (4), respectively developing type I and II interlayer fracture experiments; and (5), obtaining type I and II interlayer fracture toughness of the sample by calculation by using a digital image correlation method, wherein the result is the type I and II interlayer fracture toughness of the superconducting strip. According to the method provided by the invention, the enhancement layer, the thickness of which is much greater than the superconducting strip, is increased at two sides of the superconducting strip; therefore, the fracture toughness of the superconducting strip can be measured by a conventional experimental method; and furthermore, the experimental method is simple and high in accuracy.

The invention discloses a two-differential-pressure moisture flow on-line measuring device and method. The device comprises a Venturi flowmeter on the upstream part, a spindle flowmeter on the downstream part and a processor. The opposite ends of the Venturi flowmeter and the spindle flowmeter are connected through a flange. The Venturi flowmeter and the spindle flowmeter are connected with the processor. The processor is provided with a moisture two-phase flow measuring module, and gas-liquid two-phase flow is output on line according to input parameters. The Venturi flowmeter is arranged in front of the spindle flowmeter, and influences caused by the flowermeter on the front portion on a flow field and the flowmeter on the rear portion are reduced to the greatest degree. The spindle flowmeter is of a good streamline structure, is small in flow resistance, has the good flow stabilizing and interference resisting ability and is arranged on the downstream part of the Venturi flowmeter, and therefore the measuring performance of the combined flowmeter can be improved to the greatest degree.

The invention discloses a closed-type temperature control solid medium electrical resistivity measurement device, which belongs to the technical field of electrical measurement. The device is formed by that a test cavity is respectively connected with a direct-current power supply, a feedback-type temperature controller, a diaphragm vacuum pump, a magnetic drive pump and a Picoammeter, wherein the test cavity is formed into a coaxial hollow cylinder by an inner cavity and an outer cavity, and the upper end of the test cavity is sealed by a cover plate; the outer cavity is provided with a heat conduction oil circulation loop and is used for carrying out oil bath temperature control on the inner cavity by the heat conduction oil in a cycling way; an electrode and a test object are arranged in the inner cavity. According to the closed-type temperature control solid medium electrical resistivity measurement device, the inner cavity is subjected to even convection by a circulating oil bath so as to guarantee that temperatures of all positions in the inner cavity are consistent and are stable and constant within a range of 1DEG C. Since a form that a rubber gasket is externally pressed is adopted, a favorable vacuum degree in the inner cavity is guaranteed, an influence on an electrical resistivity measurement process by external environment humidity is minimized, and the closed-type temperature control solid medium electrical resistivity measurement device has the advantages of accurate measurement result, high reliability and easiness in operation.

The invention discloses a fine particle measuring device for detecting PM 2.5 content in the air. The measuring device comprises a PM10 collector for collecting an air sample, a PM 2.5 cutter for separating fine particles of the air sample, a detector for detecting the fine particle content of the air sample, and an air pump for stabilizing an air current. The measuring device generates small measuring errors and can be monitored in real time. The invention also provides a measuring method for fine particles.