45results about How to "Accurate Quantitative Measurement" patented technology

An improved nasal cannula for isolating, monitoring and measuring the content of a patients exhaled gases. The cannula includes an integral connector that is attached to the wall of a hollow nare to create a gas-tight interface. The other end of the connector is attached to tubing that forms an integral seal with the cannula port to create a continuous, gas-tight flow channel that is separated from the hollow cannula body. The integral connector provides a direct, isolated flow channel that eliminates the undesirable dead space in which exhaled gases from a patient can be entrapped and stagnate, resulting in cross contamination.

The invention relates to a reflecting photometer of golden mark immunity test tape that includes scanning platform, optical system, phototranslating and signal multiplication system and data gathering and control system. The scanning platform is used to locate tested golden mark immunity test tape, and the optical system includes plural illuminating optical paths and a receiving optical path. Each illuminating optical path contains a light source and an illuminating condensing lens. The receiving optical path is made up of collimating mirror, filter, condensing lens and slit diaphragm. The phototranslating and signal multiplication system is made up of phototranslating components and pre-amplification circuit, the data gathering and control system is made up of multifunction data gathering card and computer. The invention could accurately judge the tested object and the thickness. It also has the advantages of high sensitivity, objective testing result and flexible to use.

This invention relates to the method of measuring factory harmonic wave and measuring apparatus. The measuring of factory harmonic wave is measuring the system harmonic wave of electric equipment, filter factory harmonic wave source, and the factory harmonic wave that connected with the power supply system. The distribution of harmonic wave process and harmonic wave current level time changes of harmonic wave source electric equipment will be measured, and the filtering parameter of the harmonic wave source electric equipment and systematic equipment network that includes compatible power and compatible running with power supply system, filter and the mutual bus bar electric equipment will also be measured. The factory that uses this method can directly measure and manage the system harmonic wave of the factory harmonic wave. This invention synchronizing measuring the harmonic current and harmonic voltage drop level time changing of the common junction and its bus bar, and the distribution feature of the common junctions.

The invention discloses a hydrogen permeation measurement system. The system includes a vacuum pipeline unit, a heating temperature control furnace unit, and a mass spectrometer unit. The heating temperature control furnace unit is used for realizing the heating and temperature control effects on a test material, and the heating temperature control furnace unit is internally provided with a tooling test part of the test material; the test material is fixed at the tooling test part to realize testing of hydrogen permeability; the vacuum pipeline unit consists of a sample container, a first scroll vacuum pump, a first molecular pump and a hydrogen standard leak, the sample container and the hydrogen standard leak are connected to a trunk pipeline, one end of the trunk pipeline is connected to a vacuum pipe system arranged inside the heating temperature control furnace unit; the sample container is provided with a vacuum gauge; and the mass spectrometer unit includes a second scroll vacuum pump, a second molecular pump and an RGA molecular mass spectrometer that are connected in order, and the RGA mass spectrometer is connected to the trunk pipeline. The hydrogen permeation measurement equipment provided by the invention adopts an integral structure, the structure has good sealing performance, and the test structure is more accurate and reliable.

The invention relates to a method and a device for detecting gas content of a mixed fluid under a while drilling condition. The method comprises the steps of: exciting through an electric signal to generate an ultrasonic surface wave; receiving the ultrasonic surface wave; obtaining amplitude information of the received ultrasonic surface wave; and obtaining the gas content information of the mixed fluid according to the amplitude information. According to the invention, the gas content of fluids in wells can be correctly and quantitatively measured in real time, the underground geological conditions can be known, the information of oil and gas layers can be discovered in time and the wastes of oil and gas resources can be avoided; and the method and the device can be used for recognizing overpressure stratums and treatment can be carried out in time when overpressure stratums are drilled, so that the occurrences of well kick and well blowout are prevented, the heavy losses of personal lives and properties are avoided, and reference information can be provided for the drilling track regulation in the drilling process.

The invention relates to an intelligent comprehensive test device for a breather valve for an oil tank truck. The intelligent comprehensive test device comprises a vacuum pump, an air compressor, a test container, a pressure stabilization tank, a human-computer interaction computer system and a high-accuracy gas flowmeter set; the pressure stabilization tank is connected with the test container; the pressure stabilization tank is also connected with the vacuum pump for vacuumizing the test container; the pressure stabilization tank is also connected with the air compressor for providing a positive pressure gas medium to the test container; the test container is provided with a leakage rate detection hole; the leakage rate detection hole is connected with the high-accuracy gas flowmeter set; and the human-computer interaction computer system for controlling the vacuum pump, the air compressor and the test container is connected with the vacuum pump, the air compressor and the test container. The intelligent comprehensive test device has the advantages of complete function, convenience and rapidness for mounting and low cost; and the designed test container can meet requirements of different specifications of internal and external breather valves for positive pressure and negative pressure opening tests, a valve seat sealing performance test and an overturn sealing performance test.

The invention provides a total timing precision calibration device of an integrated circuit test system. The total timing precision calibration device comprises picoseconds-grade timing precision calibration adaption interface boards, a radio-frequency connector and a digital real-time oscilloscope; and a signal channel of the picoseconds-grade timing precision calibration adaption interface boards is connected with a test channel of the integrated circuit test system, the radio-frequency connector is disposed on the picoseconds-grade timing precision calibration adaption interface boards and is in a butt joint with the test channel of the integrated circuit test system through the picoseconds-grade timing precision calibration adaption interface boards, the radio-frequency connector is connected with a test channel of the digital real-time oscilloscope through a radio-frequency cable, and the digital real-time oscilloscope is in communication with the integrated circuit test system through a GPIB bus. An input-to-output timing accuracy calibration adaption interface plate, an input edge placing precision calibration adaption interface plate and an output edge placing precision calibration adaption interface plate are designed, and the radio-frequency connector and the radio-frequency cable are adopted to be connected with the digital real-time oscilloscope, so measurement for total timing precision of the integrated circuit test system is achieved.

Apparatus for indicating the departure of a shape of an object (3; 11; 16; 18; 22; 26) from a specified shape is described. The apparatus comprises radiation means for directing an incident beam of radiation (4) onto the object, and inspecting means (5) for inspecting the final beam after transmission by or reflection from said object. The apparatus is arranged so that the final beam will have a substantially planar wavefront when said object has said specified shape, and said inspecting means (5) is arranged to determine any departure of the wavefront of the final beam from planarity. In one embodiment, the inspecting means comprises beamsplitting means, for example a diffraction grating (6) or hologram, and detector means such as a CCD camera (8). The beamsplitting means is then arranged to split the final beam into two or more beams and to direct said two or more beams to laterally displaced locations on the detector means.

The invention discloses a measuring device for interface bonding strength of a superfine abrasive and a base material. The device comprises an optical flat plate, a sample table, a probe, a first sliding table, a second sliding table, a microscopic amplification system and a force measuring device. The first sliding table is connected with the sample table to drive the sample table to move in the XOY plane, so as to adjust the position of a to-be-detected sample; the to-be-detected sample is enlarged by the microscopic amplification system and the contact area between pulled abrasive grains and the base material is measured; the second sliding table drives a connection plate to lift up and down along the Z axis so as to enable the probe to be bonded with the single abrasive grains on the to-be-detected sample or the abrasive grains to be pulled out from the base material; the force measuring device comprises a force sensor, a charge amplifier, a data acquisition card and a host. Data of the interface bonding strength are calculated according to pull force and contact area. The device can perform relatively accurate quantitative measurement of the interface bonding strength between the ultrafine abrasive and the base material, and the device is simple in structure, high in measurement precision, convenient to main and low in measurement cost.

The invention provides a method for measuring the biomass of plant underground roots by using ground penetrating radar. The method comprises the following steps of: measuring the root density p of the underground roots by collecting a sample of the underground roots; measuring the diameter D of the underground roots by using the ground penetrating radar, obtaining the length L of the underground roots through the measurement of the ground penetrating radar, and if the underground roots are a cylinder, calculating the volume of the cylinder according to the diameter D and length L of the underground roots obtained through the measurement; and estimating the magnitude of the biomass of the underground roots by using a formula W=piD2LRho / 4, wherein W refers to the estimated biomass. The method has the advantages that: the diameter of the plant underground roots can be accurately and quantitatively measured through the ground penetrating radar so that the biomass of the underground roots can be indirectly obtained; and the obtained measuring result has high relevance to the actual diameter of the plant underground roots.

It is described a virtual pullback as a visualization and quantification tool that allows an interventional cardiologist to easily assess stent expansion. The virtual pullback visualizes the stent and / or the vessel lumen similar to an Intravascular Ultrasound (IVUS) pullback. The virtual pullback is performed in volumetric data along a reference line. The volumetric data can be a reconstruction of rotational 2D X-ray attenuation data. Planes perpendicular to the reference line are visualized as the position along the reference line changes. This view is for interventional cardiologists a very familiar view as they resemble IVUS data and may show a section plane through a vessel lumen or a stent. In these perpendicular section planes automatic measurements, such as minimum and maximum diameter, and cross sectional area of the stent can be calculated and displayed. Combining these 2D measurements allows also volumetric measurements to be calculated and displayed.

The invention belongs to the technical field of environmental monitoring, and particularly relates to a 1-3 nano aerosol screening device based on electromobility and application. The screening device comprises a sheath gas inlet part, an aerosol inlet part, a separation area, a sheath gas outlet part and an aerosol outlet part. According to the screening device, dispersed aerosol is screened into approximately monodispersed aerosol, a high passing rate and resolution ratio are achieved, and the device is suitable for selective screening of 1-3 nano aerosol under the atmospheric environment detecting condition, and can also be widely applied to selective screening of 1-3 nano aerosol with higher concentration generated by other sources. The device is strictly tested and calibrated, a screening transmission equation mode is known, real particle size distribution of detected particles can be obtained through data inversion, and therefore precise quantitative measurement is achieved.

The invention discloses a quantification ultrasonic nondestructive detection method of a diameter of a spot weld nugget. The quantification ultrasonic nondestructive detection method of the diameter of the spot weld nugget includes the steps that step 1, a transmitting probe and a receiving probe are installed on the two sides of the spot weld nugget of a spot weld sample; step 2, a relation curve of amplitude B and a displacement x is drawn; step 3, an actual nugget diameter is measured; step 4, a straight line is made in the relation curve, the difference of two horizontal coordinates of the cut curve is the sum of the actual nugget diameter and the effective diameter of the receiving probe, and a corresponding B0 value of the current vertical coordinate of the straight line is recoded and stored; step 5, the transmitting probe and the receiving probe are installed on the two sides of the spot weld nugget of an actual welding spot to be detected, when the receiving probe receives that the amplitude B reaches the B0 for the first time, a displacement Xa is recorded, when the receiving probe receives that the amplitude B reaches the B0 for the second time, a displacement Xb is recorded, Xt=Xb-Xa, and the diameter of the spot weld nugget of the actual welding spot to be detected is Xt-dmin. The quantification ultrasonic nondestructive detection method of the diameter of the spot weld nugget quantitatively detects the nugget diameter of the resistance spot welding quickly and accurately and visually reflects the welding spot quality.

The invention discloses an aviation instrument pointer jitter amount detecting system and the detection method thereof. The system comprises a detection device for realizing the setting of power supply to an aviation instrument and the pointer state, an aviation instrument, an instrument clamping tool for detecting and fixing the aviation instrument, and a testing cable as well as a light source, a camera clamping tool, a camera cable, an industrial camera and a computer. The industrial camera is connected with the computer through the camera cable. The camera clamping tool is installed on the instrument clamping tool. The light source is arranged between the aviation instrument and the industrial camera. The industrial camera is mounted on the camera clamping tool. The industrial camera conducts real-time acquisition of the images of the aviation instrument panel, and uploads the images to the computer for analysis. The camera clamping tool achieves the fixation and the focal length adjustment of the industrial camera. The camera cable achieves the power supply of the industrial camera and the image transmission. The computer image carries out real-time analysis on the images collected and updated by the industrial camera for the calculations of the jitter amount of the pointer.

The embodiments of the present invention provide a measurement device and method for radioactive inert gases. The measurement device includes a signal detecting device, a signal acquisition and processing device, and a computing device; the signal detecting device is used for detecting beta electric pulse signals generated by the beta decay of radioactive inert gas nuclides in a gas sample to be tested, and detecting gamma electric pulse signals generated by the gamma decay of the radioactive inert gas nuclides in the gas sample to be tested; the signal acquisition and processing device acquires the beta electric pulse signals and the gamma electric pulse signals in real time, judges whether the cascade decay of beta decay and gamma decay occurs according to the beta electric pulse signalsand the gamma electric pulse signals, and generates gamma spectral lines according to the gamma electric pulse signals; and when the cascade decay of beta decay and gamma decay occurs and a certain of radioactive inert gas nuclides exist, the characteristic energy of such kind of radioactive inert gas nuclides and characteristic energy corresponding to the gamma spectral lines satisfying a presetcondition, the computing device is used for calculating the concentration value of the activity of the radioactive inert gas nuclides. With the measurement device and method of the invention adopted,the accuracy and reliability of the measurement results of the radioactive inert gases can be improved.

The invention discloses a car body feature line disappearance position detection method. The method comprises the following steps of obtaining point cloud data of the surface of a part, wherein the part contains a to-be-detected feature line; performing gridding processing on the obtained point cloud data; calculating a cross section curvature of the part according to a predetermined interval along the feature line; and according to a change of the cross section curvature, determining a disappearance position of the feature line. According to the car body feature line disappearance position detection method, the disappearance position of the feature line is searched for by utilizing the change of the multi-cross section curvature with the aid of an optical scanning technology and computeraided processing; and compared with conventional artificial visual measurement, accurate quantitative measurement is realized, and higher measurement efficiency is achieved.

The invention relates to a measurement device and method for the sealing performance of firefighting foam. A main body of the device is an organic glass container; the organic glass container is internally provided with a porous glass disc, a porous organic glass pipe, a foam liquid inlet, a fuel steam gas inlet and a water outlet; an organic glass top cover is arranged at the top end of the organic glass container; a gas inlet and a gas outlet are arranged on the organic glass top cover; the gas inlet is connected with a flow meter, a pressure gauge, a gas bottle valve and a nitrogen gas bottle in sequence through a gas inlet pipe; the gas outlet is connected with a gas chromatograph through a gas outlet pipe; and the measurement device can be used for accurately and quantitatively sealing the sealing performance of the firefighting foam on fuel steam. The sealing performance of the firefighting foam on the fuel steam can be quantitatively measured through analyzing the time of overflowing foam from the fuel steam. The sealing performance of the different firefighting foam on the same fuel and the sealing performance of the same firefighting foam on different fuel can be systematically researched. The measurement device is ingenious in structure and is suitable for measuring the stealing performance of the firefighting foam on the fuel steam.

Embodiments of the invention disclose a dialogue text data processing method and apparatus. The method comprises: obtaining a dialogue text of a dialogue; according to the dialogue text, determining current semantic deviation degree and historical semantic deviation degree of the dialogue, wherein the current semantic deviation degree is used for indicating answer matching degree of a service staff for a question raised by a user in the dialogue, and the historical semantic deviation degree is used for indicating topic following degree of the service staff for the question raised by the user in the dialogue; and according to the current semantic deviation degree and the historical semantic deviation degree, determining a service deviation value of the service staff in the dialogue. According to the embodiments of the invention, the service of the service staff in the dialogue can be quantitatively measured more accurately.

The present invention provides a quantitative measurement method and quantitative measurement chip which can perform quantitative measurement of a target substance in a short period of time. The invention provides a quantitative measurement method in which a three dimensional mesh structure material is formed, and quantitative measurements are taken of the target substance using a structure which contains a reagent that reacts with the target substance in the mesh. This method includes a contacting step in which a test specimen which includes the target substance is brought into contact with the structure; a detecting step which, in a process in which a substance whose quantity will increase or decrease by means of the reaction between the target substance and the reagent, detects the substance whose quantity is increasing or decreasing within the structure at a contact interface between the test specimen and the reagent; and a quantitative measurement step which performs quantitative measurement of the target substance based on the results of the detecting step. The mesh structure will allow at least the target substance to pass therethrough.

The invention discloses an analyzing device and an analyzing method for trace impurities in an organic pure substance. The device comprises a liquid chromatograph, a cutting valve, an ionization source and a mass spectrometer, wherein the ionization source is based on plasma bodies and comprises an atomizer and a corona spray point. The liquid chromatograph is sequentially connected with the cutting valve, the atomizer, the corona spray point and the mass spectrometer. The method includes that a sample is sent into the liquid chromatograph and sequentially passes through the cutting valve and the ionization source based on the plasma bodies and the impurities in the sample are ionized and sent into the mass spectrometer. By utilization of the chemical ionization source based on the plasma bodies, not only can polarity impurity molecules and weak polarity impurity molecules be ionized, but also non-polar molecules can be ionized. Impurity ions of which main components are cut are sent into the mass spectrometer and then can be analyzed in terms of quality accordingly so that qualitative information of the impurity molecules is obtained.

The invention relates to a quantitative research and study method of inner and outer spacer rings of a precision shafting unit. A tested bearing and an inner spacer ring are installed at a centering mandrel of a shafting pre-tightening force measuring device; a rated pre-tightening force is applied to the tested bearing; a displacement sensor installed at the shafting pre-tightening force measuring device measures a relative displacement value of the centering mandrel under the rated pre-tightening force, wherein the relative displacement value is used as a reference value; an outer space ringreplaces the inner space ring, loading of rated pre-tightening forces with the same values is repeated, and the relative displacement value of the centering mandrel is measured as a comparison value;and then the comparison value and the reference value are compared to obtain a quantitative research and study amount of the inner space ring or outer spacer ring. According to the invention, preciseresearch and study amounts of the inner spacer ring and the outer spacer ring of the tested bearing under needed axial loads are measured quickly and quantitatively, so that the heights of the spacerrings are adjusted quickly and a qualified shafting product is installed.

The invention relates to a reflecting photometer of golden mark immunity test tape that includes scanning platform, optical system, phototranslating and signal multiplication system and data gathering and control system. The scanning platform is used to locate tested golden mark immunity test tape, and the optical system includes plural illuminating optical paths and a receiving optical path. Each illuminating optical path contains a light source and an illuminating condensing lens. The receiving optical path is made up of collimating mirror, filter, condensing lens and slit diaphragm. The phototranslating and signal multiplication system is made up of phototranslating components and pre-amplification circuit, the data gathering and control system is made up of multifunction data gathering card and computer. The invention could accurately judge the tested object and the thickness. It also has the advantages of high sensitivity, objective testing result and flexible to use.

The invention relates to an intelligent comprehensive test device for a breather valve for an oil tank truck. The intelligent comprehensive test device comprises a vacuum pump, an air compressor, a test container, a pressure stabilization tank, a human-computer interaction computer system and a high-accuracy gas flowmeter set; the pressure stabilization tank is connected with the test container; the pressure stabilization tank is also connected with the vacuum pump for vacuumizing the test container; the pressure stabilization tank is also connected with the air compressor for providing a positive pressure gas medium to the test container; the test container is provided with a leakage rate detection hole; the leakage rate detection hole is connected with the high-accuracy gas flowmeter set; and the human-computer interaction computer system for controlling the vacuum pump, the air compressor and the test container is connected with the vacuum pump, the air compressor and the test container. The intelligent comprehensive test device has the advantages of complete function, convenience and rapidness for mounting and low cost; and the designed test container can meet requirements of different specifications of internal and external breather valves for positive pressure and negative pressure opening tests, a valve seat sealing performance test and an overturn sealing performance test.

The frequency modulation and demodulation system comprises a variable capacitance diode frequency modulation circuit module which generates an oscillation signal with stable frequency as the center frequency of a frequency modulation signal, realizes frequency modulation of an input modulation signal through a variable capacitance diode, sets the direct-current reverse bias voltage of the diode randomly in a power supply voltage range to change the center frequency and the frequency modulation sensitivity of the frequency modulation signal; a down-conversion circuit module which reduces the center frequency of the frequency modulation signal so as to adapt to sampling of an oscilloscope with a lower sampling rate; a low-frequency digital oscilloscope which is used for sampling and outputting the time domain waveform data of the frequency modulation signal; and a upper computer which is used for importing the data into the MATLAB software platform for demodulation calculation. The method has the beneficial effects that important performance index parameters such as the maximum frequency offset, the center frequency and the frequency modulation linear distortion degree of the frequency modulation signal can be simply, effectively and accurately measured.

The invention discloses a method for measuring the shielding effectiveness of a low-frequency wire harness for aviation based on an active matching network. The method comprises the following steps: selecting a TEM cell; measuring the characteristic impedance of the low-frequency wire harness; selecting a load and a receiver; configuring an active matching network according to the characteristic impedance, the impedance of the load and the input impedance of the receiver; connecting the two ends of the low-frequency wire harness to a load and the input side of an active matching network, connecting a receiver to the output side of the active matching network, and putting the low-frequency wire harness into a TEM cell; setting the gain of the active matching network; and testing the low-frequency wire harness, and calculating the shielding effectiveness of the low-frequency wire harness based on an FRIIS formula and the signal power received by the receiver. According to the method formeasuring the shielding effectiveness of the aviation low-frequency wire harness based on the active matching network, the shielding effectiveness of the low-frequency wire harness can be accurately and quantitatively measured, and the method is easy to implement.

The invention discloses a detection system and a detection method for the shaking amount of the pointer of an aviation instrument, including detection equipment for realizing power supply to the aviation instrument and setting of the pointer state, the aviation instrument, and an instrument clamp for detecting a fixed aviation instrument Tooling and test cables also include light source, camera clamping tooling, camera cables, industrial cameras and computers. Industrial cameras are connected to computers through camera cables. Camera clamping tools are installed on instrument clamping tools. Between the cameras, the industrial camera is installed on the camera clamping tool; the industrial camera collects the image of the aviation instrument panel in real time and uploads it to the computer for analysis. The camera clamping tool realizes the fixation and focus adjustment of the industrial camera, and the camera cable realizes the power supply of the industrial camera And image transmission, the computer analyzes the image collected and uploaded by the industrial camera in real time, and calculates the amount of pointer shake.

The invention belongs to the field of detection of porous materials and provides a method for measuring the diffusion coefficient of porous materials. One end of the material to be tested is soaked in an adsorbed solution with a fixed concentration, and by measuring the concentration distribution at different times and positions in the material, Through the approximate one-dimensional diffusion model and Fick's second law, the space-time two-dimensional image is fitted to obtain the diffusion coefficient. In the present invention, the adsorption amount can also be obtained through the measured diffusion coefficient and concentration function integration at a certain moment, and the adsorption concentration can also be obtained through diffusion for a long enough time to calculate the adsorption amount, which is convenient for the design and production of composite materials. The method provided by the invention is simple and easy, can measure the diffusion coefficient more accurately and predict the adsorption amount, and is of great significance to the testing, design, industrial production, adsorption or slow-release application of nanocomposite materials and the like.

The invention relates to a method and a device for detecting gas content of a mixed fluid under a while drilling condition. The method comprises the steps of: exciting through an electric signal to generate an ultrasonic surface wave; receiving the ultrasonic surface wave; obtaining amplitude information of the received ultrasonic surface wave; and obtaining the gas content information of the mixed fluid according to the amplitude information. According to the invention, the gas content of fluids in wells can be correctly and quantitatively measured in real time, the underground geological conditions can be known, the information of oil and gas layers can be discovered in time and the wastes of oil and gas resources can be avoided; and the method and the device can be used for recognizing overpressure stratums and treatment can be carried out in time when overpressure stratums are drilled, so that the occurrences of well kick and well blowout are prevented, the heavy losses of personal lives and properties are avoided, and reference information can be provided for the drilling track regulation in the drilling process.