47results about How to "Accurate and reliable measurements" patented technology

The invention discloses a method for implementing online tests of stream flow based on video images, and belongs to the technical field of non-contact open channel flow measurement. The method relates to a water flow tracing system, a water surface illuminating system, a video flow acquisition system, a camera calibrating system, an image processing system and a flow estimating system, trace particles are thrown in a flow measuring stream segment by the water flow tracing system, a camera shoots a water surface video stream, frames are extracted at fixed intervals and are processed digitally, the image processing system processes digital images according to ground control point coordinate information provided by the camera calibrating system, and finally, the stream flow is computed by the aid of the flow estimating system according to a flow rate and area method. By the aid of the method, complicity of stream flow measurement is reduced, simultaneously, high measurement precision can be guaranteed, and the stream flow can be dynamically monitored in extreme environments.

The intelligent control method for air compressor includes the following steps: starting the combined control cabinet if selecting combined control mode; and operating in single set operation mode if selecting single set operation mode, and monitoring the parameters through the man-machine interfaces of the single sets. By means of combining automation technology and communication technology, the present invention performs the pressure order operation mode, resulting in operation cost of each compressor, prolonged compressor life, saving in power consumption, raised operation reliability and convenient use.

The device includes several batteries to be monitored, single chip unit, an A/D convertor and some switch units. The output signal of the single chip unit controls on/off of corresponding switch unit in cycle, and controls on/off of single battery circuit further. Data of output voltage of corresponding single battery collected by the A/D convertor are sent to the single chip unit. Advantages of the invention are: simple measuring and monitoring method, reliable measured data and low requirement of withstand voltage for signal processing and digital conversion circuit board.

The invention relates to a rotary kiln, particularly to a measurement method for rotary kiln cylinder coaxiality. The measurement method comprises the following steps: step one, before rotary kiln cylinder lifting, using a divider caliper unit to draw four arcs at two ends of each cylinder by using four arc equal division point as circle centers and lengths less than cylinder radius as radius, enabling the arcs to be intersected at four points and using the intersection point of the four points as the center of the cylinder, and then carrying out cylinder lifting work; step two, after completion of the whole cylinder lifting, setting measurement points at Chinese character "mi"-shaped support portions at two ends of each cylinder and respectively setting circular holes used as the centers of the cylinders; step three, erecting an instrument; step four, starting the instrument and calibrating the instrument; and step five, carrying out data reading; to be specific, adjusting the elevation of a theodolite and then measuring circular holes at the Chinese character "mi"-shaped support portions at the two ends of each cylinder, replacing scale plates of the laser theodolite at all circular holes, aligning the center cross curves, and measuring the error between the center cross curves and the laser point to obtain the error of the cylinder coaxiality. With the measurement method, measurement becomes convenient and precise without being influenced by the weather.

The invention provides an engine exhaust temperature thermocouple detection circuit, and relates to an engine exhaust temperature detection circuit which is high in test reliability and small in feed circuit ripple. The engine exhaust temperature thermocouple detection circuit is implemented through the following technical scheme, a thermocouple differential input instrument amplification unit and a thermocouple loop detection unit are electrically connected with an AD conversion unit through the positive end and the negative end of a thermocouple sensor to form a thermocouple loop detection circuit, and the output voltage of a thermocouple cold-end collection unit is fed into the AD conversion unit through a cold-end temperature processing unit and calculated through a CPU so that the cold-end temperature can be obtained. A thermocouple feed unit divides the reference voltage into two paths through an external T45 temperature sensor, and the thermocouple sensor negative-end voltage is fed to the AD conversion unit by one path of the reference voltage through the thermocouple loop detection unit; the other path of the reference voltage is input into the thermocouple differential input instrument amplification unit through feeding of the thermocouple sensor, and after a voltage difference signal is differentially amplified, the differentially amplified voltage difference signal is collected by an AD converter, and is fed into the CPU so that a thermocouple fault can be judged.

The invention discloses a device for testing specific surface and pore distribution of rock in an isothermal adsorption instrument, and belongs to the field of oil-gas exploration and development. On the basis of the isothermal adsorption instrument, a device accommodating a test sample is improved to meet the requirement of conventional and unconventional oil-gas exploration and development; the improved device can directly test a rock core pillar of which the diameter Phi is 25 mm and a rock core fragment of which the diameter Phi is not larger than 25 mm, so as to reduce the impact of pores distributed in the surface of the sample on the test result to a larger extent, eliminate perturbance of a smashing process on the pore structure during the testing of a coal seam gas and shale gas reservoir rock sample, and ensure that the test result can restore the practical distribution of rock pores in a stratum relatively really. For sample selection, the rock core pillar, which is tested with gas saturation and treated with rock electroanalysis, is selected for the specific surface and pore distribution test; then the rock core pillar is treated with a rock mechanical property test, so that the test result is relatively visual, and the processes of oil-gas exploration and development are accelerated.

The invention provides a method capable of detecting four kinds of type I diabetes autoimmune antibodies simultaneously, and belongs to the technical field of medical testing. The method comprises the following steps: fusing a luciferase gene with a multi-antigen gene to form a fusion vector, then guiding the fusion vector into a lactation cell system by using a cell transformation technology to perform the expression of luciferase-multi-antigen fusion protein; splitting a genetic recombinant cell, so as to obtain the luciferase-multi-antigen fusion protein; then by using a immune precipitation, mixing a dilution of the luciferase-multi-antigen fusion protein with patient serum to be subjected to specific combination to obtain a fusion protein-antibody compound, and further adding protein A agarose to capture the fusion protein-antibody compound; adding a luciferase substrate to detect the fluorescence intensity. The method is quick, simple, convenient, high in accuracy, high in sensitivity, high in signal-to-noise ration, and stable and reliable in measured value, and solves the problems such as radioactive ray radiation and pollution caused by the radioactive markers used in the prior art.

The invention discloses a luciferase co-immunoprecipitation kit for detecting a mammalian lyme disease. The luciferase co-immunoprecipitation kit comprises the following components: (1) a sample diluent; (2) a fusion protein solution composed of ranilla luciferase and a borrelia burgdorferi surface membrane protein OspC antigen; (3) a proteinA/G-coated ELISA plate; (4) washing liquid; (5) a luciferase substrate. The luciferase co-immunoprecipitation kit disclosed by the invention adopts a luciferase co-immunoprecipitation method and can be used for detecting the lyme disease and the onset period thereof according to the fluorescence intensity. The method is quick, simple and convenient, high in sensitivity, high in signal-noise ratio, and stable and reliable in measured C:\Program Files\Youdao\Dict\7.1.0.0421\resultui\dict\value.

The invention discloses a method for monitoring an acting force between a mold and a member by a fiber grating sensor. A basis is laid for quantitative research of the processes of accumulation and change of a residual stress of composite materials. When the acting force between the mold and the member in the forming process of the composite materials is monitored, the method includes following steps: firstly, an FEP thin film layer, a CFRP member pre-forming material, a mold plate, and a fiber grating sensor are laid on a support mold in sequence, and sealed via a vacuum bag; secondly, the fiber grating sensor is connected with a demodulation instrument, the forming is performed by employing the autoclave process, and the fiber grating sensor monitors the curing process strain in real time; and thirdly, acquired data is processed, and the debond stress and the sliding friction stress between the mold and the member are finally calculated. According to the method, the acting force between different molds and members in the forming process of autoclaves can be tested, the operation is simple, real-time monitoring is realized, and the accuracy is high.

The invention relates to an inertial measurement module, a flight control inertial measurement assembly and an aircraft, and the inertial measurement module comprises an inertial measurement unit which is used for measuring the inertial parameters of a moving object; an electric heating piece, which is arranged side by side with the inertia measurement unit at an interval, and is used for exchanging heat with the inertia measurement unit; a packaging structure which is used for packaging the inertial measurement unit and the electric heating piece inside; and a heat-conducting medium which isfilled in a gap between the inertial measurement unit and the electric heating piece and does not cover the top surface of the inertial measurement unit. The working temperature of the inertial measurement unit in the inertial measurement module can be maintained in an optimal state, and the pressure borne by the inertial measurement unit is small, so that the measurement accuracy and reliabilityof the inertial measurement unit are improved.

The invention discloses a water level measurer for vertical-shaft inter-crystalline brine. The water level measurer is characterized by comprising a static measuring and controlling unit and a dynamic measuring unit, wherein the static measuring and controlling unit is arranged at the shaft mouth of the vertical shaft; the dynamic measuring unit can be arranged in the vertical shaft in a sliding manner. The static measuring and controlling unit and the dynamic measuring unit in the water level measurer for the vertical-shaft inter-crystalline brine move up and down in the vertical shaft, so that a sensor A of the dynamic measuring unit is not affected by an inclined angle of the vertical shaft, and therefore, a detected value is more precise.

The invention relates to a measuring method and an instrument used for assembling and installing locomotive gear cases, which is characterized in that: the instrument comprises a reverse-U shaped bent pipe, one end of the reverse U-shaped bent pipe is connected with a magnetic stand, and the other end of the bent pipe is connected with a measuring steel loop; the bent pipe is arranged at the vertical end of one side of the measuring steel loop and also at the vertical end of one side of the magnetic stand, and the two vertical ends are on the same plane; a connector can be arranged at the joint part of the bent pipe and the magnetic stand, one end of the connector is screwed in the screw thread of the magnetic stand, the other end is welded after inserting into the bent pipe; another connector can also be arranged at the joint part of the bent pipe and the measuring steel loop; the two ends of the connector are welded after respectively inserting into the bent pipe and the measuring steel loop. The invention completely satisfies the design requirement, has easy operation, accurate and reliable measuring values, can be applied to the assembling and installation process of the DF4 locomotive gear case and can also be widely applied to the assembling and installation processes of other types of locomotive gear cases.

The invention relates to an observation method for the foundation settlement of a high-precision rolling mill, belonging to the field of foundation settlement detection. The observation method comprises the following steps: selecting a stable foundation in the rolling line-side direction of the rolling mill, setting up three observation points at different parts, and numbering the three observation points as a point A, a point B and a point C, wherein the distance between every two points is no more than 50 m; during initial observation, performing guiding measurement of the level control point BM to four settlement points of the rolling mill, wherein measured values are considered to be correct values; then performing guiding measurement of the initial value of the sinking point I to thepoints A, B and C to obtain three values, and finally, allowing the three values to return to a BMI leveling point to form a closed line; and carrying out observation on the settlement points of the rolling mill, with the point B used as a reference point, wherein in each observation, whether the points A, B and C have any change or not is observed at first, sinkage amounts observed at the four settlement points of the rolling mill are taken as corrected value if no change occurs, or other operation is performed if the points A, B and C have changes. The observation method of the invention issimple and fast to operate, accurate and reliable in measured values, lowers labor input and reduces labor intensity.

The present invention relates to a method and a device for the production and detection of a collimator, in particular for the edge detection of a collimator (K). The method involves generating (S1) at least one three-dimensional measurement data set (2) of the collimator (K); determining (S2) a plurality of transverse profile data (3) of webs of the collimator on the at least one measuring data set (2); evaluating (S3) the transverse profile characteristics (4a,4b) of the transverse profile data; generating (S4) at least one two-dimensional projection data set (5) by projecting the transverse profile characteristics of the transverse profile data; and evaluating (S5) the at least one two-dimensional projection data set (5). The preset invention also relates to a device for executing the method for the production and detection of a collimator (K), thereby performing the production and detection of the collimator (K) through the device for executing the method.

The invention discloses a modular resistor voltage measuring device. The device comprises a testing frame, a plurality of resistance voltage acquisition modules, a main control bottom plate and a multi-serial port management circuit; the testing frame is provided with a detachable tray used for fixing a PCBA board to be tested and a plurality of sets of ejector pins arranged on the tray; each set of ejector pins are in one-to-one correspondence with test points on the PCBA board to be tested; the resistance voltage acquisition modules are used for acquiring voltage and/or resistance values of test points corresponding to one set of ejector pins, and sending the voltage and/or resistance values to the main control bottom plate through a serial port; the main control bottom plate is connected with the resistance voltage acquisition modules and the multi-serial port management circuit; and the multi-serial-port management circuit obtains testing data of resistance and/or voltage from serial ports of the plurality of resistance and voltage acquisition modules in a polling mode. The measurement time can be obviously shortened, and the measurement efficiency can be improved. The invention further discloses a modular resistor voltage measuring method.