238results about How to "Reliable measurement data" patented technology

The invention relates to a coal mine underground mobile gas beam tube sampling and monitoring device which mainly structurally comprises a gas-water separator, a vacuum pump, a gas sampling and monitoring control cabinet, an oxygen sensor, a methane sensor, a carbon monoxide sensor, a circuit board, a sampling beam tube, a dust precipitator, a dehumidifier, a gas control valve, a gas flow meter, a pressure gauge and a negative pressure gauge; beam tube sampling, dust precipitation and dehumidification, gas-water separation, flow control, sensor information capturing, control cabinet monitoring and control and micro-computer information processing are adopted for pre-warning, forecasting, analyzing and displaying fire gas concentration, and working out the gas change law; the device has the advantages of advanced and reasonable design, compact structure, easy operation and convenient operation, can move in a long distance in coal mine underground to acquire and monitor the fire gas in different coal bed gob areas or closed spaces, the monitoring distance can reach 5000m, the measurement data is accurate and reliable, and the accuracy can reach 96 percent; and the device can also be used on the ground or other ores.

A compensation method according to the present invention includes: a traverse linearity data calculating step for measuring a master workpiece (MW) of which profile data is value-specified in advance while moving a sensor (7) using a linear movement mechanism (4, 5) of a measuring device (1) and for subtracting the previously value-specified profile data from the measurement data of the master workpiece to obtain a traverse linearity data of the linear movement mechanism; a workpiece measurement data calculating step for measuring the workpiece while moving the sensor by the linear movement mechanism of the measuring device to obtain a measurement data of the workpiece; and a workpiece profile calculating step for subtracting the traverse linearity data from the workpiece measurement data to obtain a true value data of the workpiece.

The invention relates to a pre-assembly method of a construction steel structure, in particular to a computer simulation pre-assembly method of the construction steel structure. The method comprises the following steps: drawing out a three-dimensional standard map of all members of a construction structure according to a design drawing through computer software and establishing a three-dimensional model drawing and a standard map library; using a 3D optical scanning measuring system to carry out three-dimensional raster scanning on the members, measuring the entity members, and introducing into a computer for obtaining a three-dimensional stereo image; using the computer software to process the measured entity members, and being compared with the three-dimensional model drawing for inspecting whether the members are qualified or not; using the actually measured members to carry out simulation assembly on the whole construction structure; finding out amount of deflection of connecting parts between the actually measured members and the simulation assembly members; and providing a member simulation assembly detection parameter report after the simulation assembly of the actually measured members is qualified, and guiding the installation and the field construction. The method has simple operation, can cover the full process of the member overall part of the construction steel structure, and has representativeness and guidance; and one-time development can be utilized repeatedly, and the waste of resources can be further avoided.

The invention relates to a magnetic gradiometer correction method based on magnetic gradient invariants. Modeling of scale factor errors, non-orthogonal errors, non-alignment errors, and zero offset errors existing during construction of tensor instrument is carried out. With help of a scaler constraint method during a magnetic vector instrument correction, two independent rotation invariants of the magnetic gradient tensor are used for the constraint, and then an optimal correction parameter is acquired. By starting from the integrated errors of the tensor instrument, the modeling of the errors of the tensor instrument is carried out, and the two independent rotation invariants of the magnetic gradient tensor are used for constraint, and then the optimal correction parameter is acquired. The errors of the tensor instrument are corrected more intensively, and measured data is more reliable. Compared with conventional tedious and complicated tensor instrument error correction methods, the magnetic gradiometer correction method is advantageous in that the result of the measured data is processed directly, and no other data is required, and use is more convenient; and in addition, the magnetic gradiometer correction method can be used in field environment provided with a geomagnetic field without being limited by various magnetic gradient measurement principles, and also can be used in magnetic shielding environment.

The invention relates to a method for analyzing the crude oil mass fraction in the drilling well fluid by a nuclear magnetic resonance technology. On the basis of the theory for measuring the oil content by nuclear magnetic resonance, the method realizes the quantitative analysis of the oil mass fraction of the drilling well fluid in a petroleum drilling well by a nuclear magnetic resonance analytical instrument through manufacturing a working curve of the oil mass fraction of the drilling well fluid in a target layer and carrying out the nuclear magnetic resonance continuous analysis of the drilling well fluid along the drilling. The method comprises the steps of calibrating by the nuclear magnetic resonance analytical instrument, manufacturing the working curve of the oil mass fraction of the drilling well fluid, collecting and processing a drilling well fluid sample, analyzing by nuclear magnetic resonance and solving the oil mass fraction in the drilling well fluid. After being applied, the invention can accurately detect the oil content of the drilling well fluid, analyze the drilling well fluid in the well drilling process in time at the well drilling scene, obtain the analytical data of the oil content of the drilling well fluid in time and achieve the quantitative evaluation on the oiliness of a storing and collecting layer, has real, accurate and reliable measured data and provides technology support for the exploration, development and production of petroleum in time.

The invention relates to a device for measuring meshing gear clearance in a closed cavity, which is mainly composed of an integrated retaining plate, a long arc plate and a measure square plate, the long arc plate is an arc shaped tile plate, the retaining plate is a round plate, the center of the circle is equipped with a round hole, the measure square plate is a square plate, the retaining plate is fixed on the inner side of the arc on one end of the long arc plate, the measure square plate is fixed on the outer side of the arc on the other end of the long arc plate, the side wall of the measure square plate is carved with a horizontal line. The measurement of the meshing gear clearance can be done with the device and measure method according to the invention, which has the merits of simplicity and convenience, high practicability, and high labor efficiency.

The invention discloses a combustible liquid vapor explosion and explosion suppression characteristic test system. The system comprises an explosion tank, a double heating temperature-control system, a gas distribution system, a double ignition delay explosion suppression system, and a data test and acquisition system. The explosion tank is provided with a window and six through holes. The explosion tank is covered by a heating sheet of the double heating temperature-control system on the explosion tank. An insulation material is covered on the heating sheet. The temperature-control system is connected with the heating sheet and an air heater. An air compressor of the gas distribution system communicates with a through hole I through the air heater, an ejector, and an ejector pipe. A gas discharge pipe communicates with a through hole II. A vacuum pump communicates with a through hole III. A static pressure sensor communicates with a through hole IV. An ignition electrode of the double ignition delay explosion suppression system is arranged in the explosion tank, and is connected with a delay circuit and a high-voltage power source through the through hole V. An explosion suppression tank is arranged on the top of the explosion tank. A gas generator is arranged in the explosion suppression tank. A nozzle is arranged on the bottom of the explosion suppression tank. A dynamic pressure sensor of the data test and acquisition system is arranged on the through hole VI, and is connected with an oscilloscope through a signal amplifier. The system provided by the invention has the advantages of simple application, multiple test functions, and high precision.

The invention relates to a method for measuring large field-of-view telescope optical system distortion and field curvature. According to the invention, parallel light sources (1) come directly into a to-be-detected large field-of-view telescope (6). The field of view can be changed through the adjustment of the inclination and the pitching attitude of the parallel light sources (1). In the process of full field of view measurement, the to-be-detected large field-of-view telescope (6) remains to be in a fixed state. A computer (3), a wavefront detector (4) and the motion platform (5) of the wavefront detector form a closed-loop positioning structure to precisely measure and position the spatial positions of the image points of the to-be-detected large field-of-view telescope. Through the comparison of the ideal positions of the image points, the distortion and field curvature of the to-be-detected large field-of-view telescope (6) optical system can be obtained through fitting. The measuring method of the invention can be operated simply and effectively and achieves high measurement efficiency. Further, the method can perform automatic checking and can provide reliable measurement data for large field-of-view telescope optical system to correct distortion and field curvature.

The invention belongs to the technical field of engineering measurement, and relates to a device for measuring ground settlement, in particular to a device for measuring the settlement of a tunnel or a subway pipeline by combining an optical fiber grating sensor. The device for measuring the ground settlement comprises the optical fiber grating sensor, and is characterized by also comprising a lever and three supports which are positioned under any three positions of the lever respectively; the bottoms of the three supports are fixed on the ground; the tops of the supports are connected with the lever positioned over the supports or the optical fiber grating sensor; and when the tops of the supports are connected with one end of the optical fiber grating sensor, the other end of the optical fiber grating sensor is connected with the lever positioned over the optical fiber grating sensor. The device has the advantages of simple structure and measuring accuracy.

The invention provides a device for measuring rheological parameters of concrete, and particularly relates to a device for measuring rheological parameters of fresh concrete, so as to solve the problem of inaccurate measuring result in the prior art for measuring the rheological parameters of the fresh concrete and the problem that the adaptability of the prior art is limited. The device comprises a cylindrical container, a first casing pipe, a second casing pipe, an upright rod, a shaft rod, a conical cylinder, a first time switch, a second time switch, a deflector rod, a weight, a cylinder,a disc, a ring, a concrete vibrating platform and a timer, wherein the end face of one end of the first casing pipe is fixedly arranged on the end face of the bottom in the cylindrical container; theend face of the other end of the cylinder is connected with the end face of one end of the ring; one end of the shaft rod is placed in the first casing pipe; the end face of one end of the shaft rod is propped against the end face of the bottom in the cylindrical container; the weight is arranged on the upper end face of the disc; and the cylindrical container is fixedly arranged on the surface of the concrete vibrating platform. The device is used for measuring the rheological parameters of the fresh concrete.

The invention discloses a method for testing the heat transfer coefficient in a continuous-casting secondary cooling area, which comprises casting a flame couple into a crystallizer, and fixing in a casting blank, dragging the flame couple through the casting blank to pass through the secondary cooling area, measuring the temperatures of two temperature measurement points in the casting blank through the flame couple, outputting electrical signals, adopting a signal processing unit to separate and magnify the electrical signals, and conversing into digital signals to be output, splitting the casting blank, measuring the distance between two temperature measurement points in the casting blank, adopting a calculation unit to record each measurement data, calculating and processing, and calculating the heat transfer coefficient. The testing method adopts a couple pulling method to directly measure temperatures in the casting blank of the secondary cooling area, and actually reflects the integral influences of various heat diffusion in the secondary cooling area through calculating to get the heat transfer coefficient, the measurement data are more accurate and reliable, and the actual production applicability is improved. The phenomenon that the flame couple is swung is avoided through adopting a supporting stand to fix the flame couple, and the accuracy of measurement is greatly improved.

The invention discloses a field rock mass poisson ratio test method. The method comprises the steps of firstly digging a test flat hole in a mountain, drilling a cylindrical test piece on bedrock on the bottom surface of the test flat hole by utilizing a hollow drill bit, and symmetrically perforating test holes in the bottom of an annular groove at the periphery of the test piece; sleeving the test piece with an elastic steel lantern ring provided with a steel contact and a strain plate, connecting a strain plate test line and a resistance strain gauge, and calculating transverse deformation of the test piece by virtue of test; fixing the top surface of the test piece together with a test flat hole top plate sequentially through a pressure plate, a jack, a reducing connector steel plate, a combined force transfer rod and a hinge anchor, installing measuring points in bolt holes in two sides of the pressure plate and in the test holes in the bottom of the annular groove, and installing a dial indicator above the measuring point; calculating vertical deformation of the test piece after the load test; then calculating a corresponding transverse strain value and a vertical strain value, and calculating the poisson ratio of the test piece according to the transverse strain value and the vertical strain value. The field rock mass poisson ratio test method has advantages that the implementation method is simple and rapid, the measurement data is accurate and reliable, and the real condition of the rock mass can be comprehensively reflected.

The invention relates to an intelligent swing type target flow meter, belonging to the field of liquid measuring devices. The intelligent swing type target flow meter is characterized in that a valve body (2) is provided with a detection hole (6), a target plate (2) is arranged at the detection hole and is hinged with the sidewall of the detection hole through an angle sensor (3) so as to form a swing type target structure, the target plate is adapted with a channel (7) in area, the flow variation of a measuring tube is converted into the swing angle variation of the swing type target, then the switch angle is converted into the angle variation of a magnetic line, and an intelligent transducer (5) is arranged and connected at the output end of the angle sensor (3). The target plate is stressed and rotated on a hinge point by a certain angle, the angle sensor sends out an electric signal and inputs the signal into the intelligent transducer, and the intelligent transducer processes the electric signal into a flow signal for display or output, thereby measuring the fluid flow. The intelligent swing type target flow meter has the characteristics of high sensitivity, high adaptive ability, better measuring effect of the flow of the liquid affected by high viscosity, gas and sand content and the like and is especially suitable for measuring the integrated flow of transmission media in a multiphase pipeline.

The invention belongs to the technical field of galvanic corrosion measurement for metal materials, in particular relates to a multi-channel galvanic corrosion measurement device. According to the multi-channel galvanic corrosion measurement device, an SOC (System on a Chip) processor structural design is adopted; the front end of an electrode connection cable is connected with an electrode; the rear end of the electrode connection cable is connected into a voltage/current measurement switching unit; two ends of a front end signal conditioning circuit are bridged with a reference source afterbeing electrically communicated with an A/D (Analog-to-Digital) conversion circuit; the front end of the front end signal conditioning circuit is electrically connected with the voltage/current measurement switching unit; the output end of the A/D conversion circuit is electrically communicated with a main control module after being connected in series with a multi-channel electric isolation unit; an SOC processor is arranged in the main control module; the main control module is electrically connected with a display module, a storage module and a communication module respectively, so that electric information control is realized; and a signal input by a reference electrode is incorporated into the front end signal conditioning circuit after being amplified, so that a signal processing system is formed. The multi-channel galvanic corrosion measurement device has the characteristics of simple overall structure, reliable principle, convenience for use and operation, accuracy in measurement data, flexibility for control and wide application range.

The invention relates to qualitative and quantitative analysis for X-ray diffraction mineral. Wherein, the X-ray diffraction phase analysis sample bracket comprises a silicon single-crystal piece in the following base frame, a base frame, and a dust-carry film stuck on said single-piece; the single-crystal piece is single diffraction peak, and is prepared by cutting into pieces along the crystal face 0-12Deg and grinding and polishing. This invention can eliminate the effect to measurement accuracy from device, time and parameter, simplifies operation, and cuts time to improve efficiency.

The invention relates to a wave velocity and thickness calibrating method for ultrasonic wave welding spot detection. A test block of a corresponding material is selected for to-be-tested workpieces of different materials, the wave velocity calibrating error caused by different materials is minimally reduced; meanwhile, the invention provides thickness calibration for the to-be-tested workpiece, and the defect of existing detection equipment is made up from the application point of view. By adopting the technical scheme provided by the invention, aiming at wave velocity calibration of different materials and thickness calibration of different workpieces, the measurement accuracy is greatly improved, the measurement error caused by inaccurate wave velocity and thickness is reduced, and thus the data measurement is more reliable.