49results about How to "Reliable test method" patented technology

The invention discloses a mesomechanics testing system of gas-containing coal rocks, which comprises a transparent sight glass that is fixed at an opening position of a testing cavity, a three-dimensional moving microscopic observing frame that is arranged outside the transparent sight glass, and a stereoscopic microscope and a CCD camera that are arranged on the three-dimensional moving microscopic observing frame; an inner end of a measuring conducting wire is connected with an acoustic emission sensor, and an outer end of the measuring conducting wire is connected with an acoustic emission magnifier and an acoustic emission card; the testing cavity is communicated with a gas pipe through a multi-purpose air vent, and the gas pipe is divided into two paths with one path connected with a high-pressure gas bottle and the other path connected with a vacuum pump; a cushion block, a limit pressure head and a loading head are arranged inside the testing cavity, a vertical surface of an L-shaped nick of the cushion block is over against the limit pressure head, and a transverse surface of the L-shaped nick of the cushion block is over against the loading head. The mesomechanics testing system of the gas-containing coal rocks provides more complete and reliable test methods for revealing the micro-structural damage law of the coal rocks under the gas action, further and deeper finding out the physical and mechanical properties of the gas-containing coal rocks, scientifically revealing the occurrence mechanism of the dynamic phenomenon of the coal rocks, and developing corresponding disaster prevention techniques.

The present invention discloses a true triaxial test ultrasonic wave and acoustic emission testing system. According to the present invention, a true triaxial test apparatus has six sides of pressurization units, wherein ultrasonic wave and acoustic emission coupling test transducers are arranged between every side of the pressurization unit and corresponding surfaces of rock, a communication terminal of at least one ultrasonic wave and acoustic emission coupling test transducer is connected with a signal output terminal of a multi-channel ultrasonic wave defect detector, communication terminals of other ultrasonic wave and acoustic emission coupling test transducers are respectively connected with a signal input terminal of the multi-channel ultrasonic wave defect detector and a signal receiving terminal of an acoustic emission instrument through signal shunts, and the acoustic emission instrument and the multi-channel ultrasonic wave defect detector are connected with a computer. With the present invention, an ultrasonic wave test and an acoustic emission test can be performed on the same rock, completely comprehensive data information can be provided for understanding of deformation and breaking law, and mechanics mechanism of the rock, and adverse affects on test results by difference of different blocks can be avoided.

The invention relates to a rock micromechanics testing device and in particular relates to a rock biaxial compression micromechanics testing device under stress-water current-chemical coupling actions, belonging to instruments and equipment. A lateral loading shaft is additionally arranged in the testing device, so that the loading mode of uniaxial compression in the existing testing device is improved. A vertical partition plate is additionally arranged in a box body and divides the box body into two independent parts, wherein one part serves as a test chamber for testing, and the other part serves as a working chamber for lateral loading. A water inlet and a water outlet are matched with the test chamber and can control a stable water current to be formed in the test chamber. The height of the box body can be adjusted by additionally arranging horizontal adjusting bolts to ensure that the box body is always in a horizontal state. The device can achieve biaxial compression loading on rock samples and control the flow velocity of chemical solutions so as to achieve biaxial compression tests on rocks under the condition of actions of different chemical solutions, is reasonable in design, is convenient to operate and use, and is suitable for biaxial compression tests of various rocks under stress-water current-chemical coupling actions.

The invention relates to an in-situ test method for the surrounding rock relaxation depth in a columnar jointing rock mass cavity project. The in-situ test method includes the steps of designing and arranging test drilling holes which are formed in the periphery of a cavity excavated in a columnar jointing rock mass and parallel or perpendicular to the axis of a column body of the columnar jointing rock mass, selecting test projects, determining the relaxation depth, and comprehensively conducting the test. The test drilling holes are distributed in key portions of a monitored fracture surface after the cavity is excavated, surrounding rock elastic waves and jointing fissure characteristics of the monitored fracture surface of the excavated cavity are obtained through an in-situ test means which integrates digital drilling with camera shooting and integrates single hole sound waves with across hole sound waves, and the surrounding rock relaxation depth is comprehensively judged according to reduction of the wave velocity of the sound waves in an unloading relaxation area and the corresponding rock mass fracture condition. The technical scheme is simple, the test means is reliable, comprehensive collection and comparison analysis of columnar jointing rock mass unloading relaxation information are ensured, the surrounding rock relaxation depth is accurately confirmed, the in-situ test method can be widely applied to columnar jointing rock mass excavation and supporting projects such as water conservancy and hydropower projects, traffic projects and underground test site projects.

The invention relates to a pointer type pressure gauge intelligent verification system and method. The intelligent verification system comprises an image acquisition unit, a knocking mechanism, a moving mechanism, a control unit, an automatic pressure regulating unit and a data processing and analyzing unit. The intelligent verification method comprises the steps of enabling a verifier to log in averification system, and initializing the system; manually loading the meter; turning on an industrial camera and a light source; boosting fixed-point detection; performing pressure reduction fixed-point detection; carrying out uninterrupted boost and buck detection; and outputting verification result. According to the invention, machine vision and image processing technologies are adopted, automatic reading of ID numbers, precision, units and full-scale values of the dial plate of the pressure gauge is realized, effective management, query, export and the like of a pressure gauge template, verification authority and a verification result are realized at the same time, and a basis is provided for subsequent tracking and management of products. Automatic control over a fixed-point pressurevalue is completed through the proportional control valve and the PLC, automation of the calibration process is achieved, and a rapid, accurate and reliable calibration method is provided for pointertype instrument calibration.

The invention belongs to the technical field of hydraulic transmission and control and particularly relates to a control system and a control method for an opening and closing type pump test. An input end of a booster pump of the system is connected with a pool. An output end is connected with an input end of an electromagnetic flowmeter B. An output end of the electromagnetic flowmeter B is connected with a water supplying opening of a water storage tank and the input end of the electromagnetic flowmeter B is further connected with the pool. A liquid level transmitter is arranged at the top of the water storage tank. A vacuum pump is connected with a vacuum opening of the water storage tank. An air compressor is connected with a booster opening of the water storage tank. An inlet of the water storage tank is connected with an outlet of an electric three-way valve. An outlet of the water storage tank is connected with an input end of a testing pump. An output end of the testing pump is connected with an input end of an electromagnetic flowmeter A. An output end of the electromagnetic A is connected with an operation end of the electric three-way valve. A water discharging end of the electric three-way valve is connected with the pool. According to the system, a cavitation test is performed to a tested pump on the condition of opening or closing and equal liquid level control is performed to liquid in the water storage tank on the condition of opening so that smooth completion of the cavitation test is guaranteed.

The invention discloses a device for testing the comprehensive performance of an ultrasonic water flow transducer. The device comprises a closed pipeline provided with an environment testing chamber and a real water flow simulation system; an environment simulation system, a transducer mounting rack and a measuring rack are arranged in the environment testing chamber; transducers to be tested are placed at two ends of the transducer mounting rack; and a transducer performance measuring device is arranged outside the environment testing chamber and connected onto the two transducers to be tested respectively. The invention discloses an application method of the device simultaneously. Compared with the prior art, dynamic and static characteristic comprehensive performance tests of the ultrasonic water flow transducer can be performed in a real water flow state, major usability performance indexes and reliability of the ultrasonic water flow transducer can be recognized and predicted before the ultrasonic water flow transducer is placed in a sensor and a whole instrument, and performance indexes, quality levels and production efficiencies of ultrasonic meters for water, heat and the like are further improved.

An optical measurement device of the unified glare rating of an LED lamp comprises a laser range finder (1), an angle gauge (2), an imaging lens (3), a high-resolution CCD (charge coupled device), a microprocessor (5) and a display (6), wherein the laser range finder (1) projects laser to a target LED lamp (7), and at the same time, the observation distance between the laser range finder (1) and the target LED lamp (7) is measured; the angle gauge (2) outputs a view angle value of deviation of a laser direction of the laser range finder (1) relative to a horizontal direction to the microprocessor (5); and the imaging lens (3) images the target LED lamp (7) and surrounding scenes of the lamp to the high-resolution CCD, and the microprocessor (5) calculates the unified glare rating of discomfort glare of the lamp according to images shot on the high-resolution CCD, the observation distance and a view angle. According to the method, the unified glare rating of discomfort glare of indoor and outdoor lamps of an actual service environment is measured accurately, and the safety use of the lamps is standardized further.

The invention provides a method for estimating the concentration of secondary organic carbon (SOC) in particulate matters in environment air. The method comprises the following steps: firstly, determining the concentrations of SO4<2->, NO3<->, NH4<+>, organic carbon and element carbon in PM2.5 (Particulate Matter 2.5) in the environment air; calculating by utilizing the concentrations of the organic carbon and the element carbon to obtain the concentration of the secondary organic carbon in the PM2.5; establishing a regression model for describing a mutual relation of the SO4<2->, the NO3<->, the NH4<+> and the secondary organic carbon; finally, estimating the concentration of the secondary organic carbon by applying the model through the concentrations of the SO4<2->, the NO3<-> and the NH4<+> in the PM2.5. The concentration of the secondary organic carbon is estimated by utilizing the correlation between secondary pollutants in the PM2.5 and the problem of how to obtain the concentration of the SOC through directly determining the concentration of secondary inorganic ions in the PM2.5 in the environment air is solved, so that a theoretical foundation is provided for source analysis and environment behavior of the secondary organic carbon.

The invention relates to a fracture network shear-two-phase flow test device and test method. The device comprises a model boundary isobaric water and gas injection device, a model boundary water andgas collection device, a glass fracture network model, a wide cover plate, a narrow cover plate and a water and gas collection tank, wherein the model boundary isobaric water and gas injection deviceand the model boundary water and gas collection device are mounted on the two sides, facing the external environment, of the glass fracture network model respectively; thewide cover plate and thenarrow cover plate are clamped above and below the glass fracture network model; the model boundary water and gas collection device is externally connected with a water and gas collection tank, a coordinate system is established with the length direction of the glass fracture network model as the x axis and the width direction as the y axis, the glass fracture network model can move in the X-axis direction and the Y-axis direction, and the displacement in the X-axis direction needs to be larger than 0.By means of the device and method, two-phase flow tests under different opening degrees and different shear displacement conditions can be achieved, and the shear-two-phase flow mechanism of the fracture network is disclosed.

The invention aims to provide a method for measuring the pressure of a turbine chamber of a marine gas turbine. The method comprises the following steps of selecting a turbine chamber which needs to be subjected to pressure measurement; determining the arrangement positions and the number of to-be-measured turbine chamber measuring points; designing a pressure measuring tube lead path; according to the lead planning path, the turbine case and the turbine guide blade being subjected to supplementary machining; according to the lead planning path, pressure measuring tube installation and lead being completed; the pressure measuring pipe being fixed along the way, and the casing being sealed. The method is advantaged in that the survival rate of the pressure measuring points is improved, and pressure parameters of the turbine part cavity of the marine gas turbine can be accurately obtained in real time. Key data support can be provided for gas turbine part design, mutual matching of a turbine and a gas compressor part and whole machine axial force adjustment. The method is not limited to the measurement of the pressure of the turbine component chamber of a marine gas turbine, but also suitable for measurement of the pressure of the turbine component chambers of industrial gas turbines, aero-engines and heavy-duty gas turbines.

The invention discloses a method for testing the alkali efflorescence resistance of a pavement brick. The method comprises the following steps of: (1) selecting an experimental pavement brick test piece; (2) saturating the test piece by water absorption; (3) laying 10 mm thick sand having a moisture content of 24% in a plastic box, then placing the water-absorbing saturated test piece on the sandwith a surface layer facing upward; (4) adopting a high and low temperature circulation system, setting a high temperature environment of 25 to 30 DEG C, a low temperature environment of 0 to 5 DEG C,24 hours of a cycle period, a high temperature period of 6+/-1 hours, a low temperature period of 18+/-1 hours; placing the plastic box containing the water-absorbing saturated test piece and the sand in the low temperature environment to cool it to form a supersaturated state of a solution; then placing the box in the high temperature environment and carrying out a blowing treatment to promote the evaporation of water to precipitate crystals; and (5) obtaining a efflorescence condition on the surface of the pavement brick test piece after 5 to 7 cycles.