31results about How to "Measurement data is real" patented technology

The invention relates to a transformer insulation state on-line monitoring device which comprises an industrial computer, a data acquisition card and a digital I / O card, wherein the data acquisition card and the digital I / O card are arranged on the industrial computer, the digital I / O card is connected with a power management unit, a signal conditioning unit and an amplifier unit are connected with a dielectric loss iron core measuring unit, the data acquisition card is connected with the amplifier unit and the dielectric loss iron core measuring unit, the amplifier unit is connected with the signal conditioning unit, the signal conditioning unit is connected with a local discharge fronting plate, the dielectric loss iron core measuring unit is connected with a dielectric loss iron core fronting plate, the local discharge fronting plate is connected with a large sensor at the bottom of a sleeve and a two-in-one sensor at the tail screen of the sleeve, the dielectric loss iron core fronting plate is connected with the two-in-one sensor at the tail screen of the sleeve and an iron core grounding sensor for sending the acquired signal to the industrial computer for signal polarity identification, digital filtration and anti-interference processing, a local discharge of each phase of a transformer to be measured is computed, discharge times are counted and a discharge tendency chart is generated. The invention has the characteristics of good integrity, high measurement accuracy, simple software operation and capability of remote browsing.

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 belongs to an aero-engine measurement technology, and relates to a device for measuring the coaxiality of a bearing seat of an aero-engine combustion chamber casing. The device is characterized by consisting of a locating sleeve (4), a front needle rolling bearing (5), a front baffle ring (6), a rear needle rolling bearing (7), a rear baffle ring (8), an end cover (9), an end cover screw (10), a bracket (11), a bracket screw (12) and a dial indicator (15). The invention provides the device for measuring the coaxiality of the bearing seat of the aero-engine combustion chamber casing, so that the measurement problems of the diameter sizes of the components such as the bearing seat and a mounting side of the casing as well as the coaxiality and the jerk value of an engine rotor in the casing experiment can be solved, and the dynamic balance accuracy of the engine rotor can be guaranteed.

The invention discloses a tunnel construction surrounding rock loosing circle deformation automatic monitoring early-warning device and method. The device comprises sensing systems and collection transmission systems fixedly connected to a tunnel lining surface; multiple detection fracture surfaces are arranged in a tunnel, and multiple sensing systems are arranged on each detection fracture surface; at least one collection transmission system connected with each sensing system is arranged between multiple adjacent detection fracture surfaces; the sensing systems are used for monitoring tunnel construction surrounding rock loosing circle deformation in real time and the monitoring data is sent to the collection transmission systems, and the data interaction is performed between the collection transmission systems and a remote terminal, and the early-warning in different levels is performed. The device disclosed by the invention is simple in structure, convenient to mount and use, low in cost, and capable of eliminating tunnel construction interference, high in monitoring precision, good in performance, and real and reliable in measurement; the automatic data collection and automatic alarming are performed, and the information is automatically pushed to a background, thereby facilitating a construction department to formulate a solution in time according to the corresponding monitoring information, the tunnel construction security and the construction efficiency are greatly improved.

The invention discloses a differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device and a using method thereof. The upper end of a sample box (2) is connected with a sealing top cap (3), and the lower end is connected with a cylinder base (5) and a porous permeable plate (4). The outlet of a top cap air charging module (15) and the inlet of a top cap vacuum pumping module (17) are connected with the sealing top cap (3), and are further connected with a first precision digital barometer (13). The outlet of a base nitrogen charging module (16) and the inlet of a base vacuum pumping module (18) are connected with the cylinder base (5), and are further connected with a second precision digital barometer (14). The outlet of the top cap vacuum pumping module (17) and the outlet of the base vacuum pumping module (18) are connected with a vacuum pump module (19). The invention relates to a differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device which can effectively measure the medium radon precipitation rate of emanation rocks under different differential pressures.

The invention discloses a concrete diaphragm wall lateral earth pressure cell embedding device, and relates to an application technology for monitoring concrete diaphragm wall lateral earth pressure in a water control project risk assessment and control process. The concrete diaphragm wall lateral earth pressure cell embedding device comprises a steel guide rod, sleeves for being connected with earth pressure cell bases, and support rods; the sleeves (2) for being connected with the earth pressure cell bases can freely slide on the steel guide rod (5); when a guy wire (9) is tensioned, the support rods (6) push circular sliding blocks (4) sleeving the sleeves (2) to compress springs (3), the springs (3) push the earth pressure cell bases (1) and the sleeves (2) to be supported into concrete diaphragm wall lateral earth; a tooth-shaped block (8) and a locking block (7) at the tail ends of the support rods (6) form a graded locking device allowing the support rods (6) to be locked at different angles, so that requirements of different concrete diaphragm wall widths and hardness and softness of earth on two sides of the wall can be met. The concrete diaphragm wall lateral earth pressure cell embedding device can be widely used for embedding an earth pressure cell for monitoring lateral earth pressure of various cast-in-situ concrete diaphragm walls in a water control project.

The invention provides a multi-channel signal acquisition circuit for downhole power system parameter measurement. The multi-channel signal acquisition circuit comprises a micro-processor, a parameter acquisition circuit, a storage circuit, a clock circuit, a resetting circuit and a computer. The micro-processor is connected with the parameter acquisition circuit, the storage circuit, the clock circuit, the resetting circuit and the computer. The signal acquisition circuit added in a power supply of an intelligent drilling tool can monitor the working state of a downhole power system, record the voltage and current change condition of each link of the power system, provide objective and authentic measured data for the fault analysis and maintenance of the power system of the intelligent drilling tool, prevent hidden danger of fault misjudgment and risk oversight caused by single ground detection, shorten the maintenance period of the intelligent drilling tool, improve the safety and stability of downhole work of the intelligent drilling tool and prolong the service life of the intelligent drilling tool.

The invention discloses a test device of a soil unit test piece. A side press plate is uniformly arranged on the outer side of a soil sample test piece to be tested arranged in a soil sample holding table groove; meanwhile, a sliding device capable of sliding and being fixed is arranged at the outer side of a loading device; the loading device is used for exerting a load on the top surface of thesoil unit test piece, and simultaneously performs different constraints on the opposite side, third side and fourth side of the soil unit test piece; the constraints at the identical sampling positionare exerted on the test soil unit test pieces according to the constraint conditions received by the soil unit in the roadbed sampling position; the test on force in different directions of the soilsample test piece to be tested can be realized, so that the soil sample test piece to be tested is naturally stressed. The device has the advantages that the structure is simple; the soil unit test piece can be subjected to direct shearing test under the constraint conditions; in addition, the shearing surface of the soil unit test piece is enabled to be always in contact with the soil body in thesharing process; the Poisson's ratio of the soil sample is measured through measuring the peripheral deformation and vertical deformation of the soil unit test piece; the measuring authenticity of the soil unit test piece is effectively improved.

The invention discloses MBD measurement technology for a large-scale composite material high-precision difficulty part. The high-precision difficulty part is placed on a milling tool, and measurement is carried out on the high-precision difficulty part in an MBD digital-analogue natural state in combination with comprehensive application of a laser tracker, a CMM (3D coordinate measuring machine), tools and formulation of process programs. In setting up of a coordinate system, as for the 3D coordinate measuring machine, a part digital-analog ABC reference is adopted; ABC reference constraint is first conducted; and then a corresponding coordinate system is established; and finally, measurement is carried out on calibrated measurement essential elements. The measurement method of the invention is high in efficiency and accurate in measurement data.

The invention discloses a clamp for the mechanical property test of welding of a steel-bar truss, belongs to the device for fixing a test member, and particularly relates to a clamp for the shear resistance test of welding points of the steel-bar truss. The clamp is characterized by comprising a main hook, a positioning shaft, a sliding block, an adjusting bolt and a base which are connected, wherein the front end of the main hook is provided with a hook head which is provided with a sample opening groove, and the rear end of the main hook is provided with a positioning shaft sleeve; the positioning shaft connected with the sliding block is arranged in the positioning shaft sleeve in a sliding manner; the sliding block is arranged in a rectangular sliding groove arranged on the base in a sliding manner, and is connected with the adjusting bolt arranged on the side wall of the rectangular sliding groove; and a fixed plate is arranged under the base and is connected with a drawing machine. By utilizing the clamp disclosed by the invention, the test is carried out according to the steps of manufacturing a sample, installing the clamp, clamping the sample, adjusting the main hook, drawing and evaluating yield. The clamp disclosed by the invention has the advantages that the concept is novel, the structure is simple, the use is convenient and reliable, multiple purposes are achieved by one clamp and the application to the mechanical property test of multi-specification trusses can be achieved; and since the sample is manufactured at normal temperature, the operation is simple and convenient, the consumed time is less, the measured data is real, accurate and reliable, the efficiency is high and no energy consumption is caused.

The invention provides a multi-point displacement meter capable of automatically measuring space displacement. The multi-point displacement meter comprises an anti-explosion online monitoring terminal, an anti-explosion Bluetooth emitter, a space displacement sensor, a wire, a drilling rod, a fixed ratchet and an end drilling rod. According to a to-be-measured rock stratum separation layer, an offset position and depth of a drilling hole, length of the drilling rod is adjusted. Then, the drilling rod part is completely inserted into the drilling hole, and a reference plate tightly clings to surrounding rock. When a separation layer and offset occur in each rock stratum, a rotation small ball in the space displacement sensor rotates, a displacement telescopic rod is extended, and the space displacement sensor transmits a signal to the anti-explosion online monitoring terminal for processing and then stores the data. During data acquisition, the data is transmitted into a collector through the anti-explosion Bluetooth emitter. By combining the space displacement sensor, the drilling rod, the anti-explosion online monitoring terminal and the Bluetooth device, the movement rule of surrounding rock in the space can be precisely and properly researched, measurement is real and installation is easy.

The invention discloses a high-temperature fatigue testing device under the combined action of vanadium pentoxide corrosion and sulfuric acid corrosion. The device comprises a heating cabin (1), the heating cabin (1) consists of two parts which are hinged with each other; through holes are formed in a top plate and a bottom plate of the heating cabin (1); an electric heating device (2) is arrangedon the inner wall of the heating cabin (1), and a tray (3) is arranged at the bottom; the testing device further comprises a sample clamping mechanism (4); the sample clamping mechanism (4) is composed of two clamping assemblies which are longitudinally distributed; the clamping assembly comprises a hydraulic cylinder (5); a clamping jaw (6) is connected to the working end of the hydraulic cylinder (5), a connecting piece (7) is clamped in the clamping jaw (6), one end of the connecting piece (7) is matched with the clamping jaw (6), a connecting rod (8) is connected to the other end of the connecting piece (7) in a sleeved mode, and meanwhile a locking jackscrew (9) matched with the connecting rod (8) is in threaded connection.

The invention discloses MBD measurement technology for a large-scale composite material high-precision difficulty part. The high-precision difficulty part is placed on a milling tool, and measurement is carried out on the high-precision difficulty part in an MBD digital-analogue natural state in combination with comprehensive application of a laser tracker, a CMM (3D coordinate measuring machine), tools and formulation of process programs. In setting up of a coordinate system, as for the 3D coordinate measuring machine, a part digital-analog ABC reference is adopted; ABC reference constraint is first conducted; and then a corresponding coordinate system is established; and finally, measurement is carried out on calibrated measurement essential elements. The measurement method of the invention is high in efficiency and accurate in measurement data.

The invention discloses a loss measurement system of a flexible DC converter valve power module. The system comprises a heat insulation box, a temperature measurement module, a heater, a water coolingmodule, an inlet water temperature measuring module, an outlet water temperature measuring module, an air inlet module, an inlet air temperature measuring module, an air outlet module and an outlet air temperature measuring module; the temperature measurement module, the heater and the water cooling module are arranged in the heat insulation box, the inlet water temperature measuring module and the outlet water temperature measuring module are arranged in the water cooling module, the inlet air temperature measuring module is arranged in the air inlet module, and the outlet air temperature measuring module is arranged in the air outlet module; the heater is used to heat the internal of the heat insulation box; the water cooling device is used to carry out water cooling on a measured powermodule arranged in the heat insulation box; and the wall of the heat insulation box is provided with an air inlet and an air outlet connected with the air inlet module and the air outlet module respectively. The system can obtain a more accurate loss measurement result via a simpler measurement structure, and the measuring efficiency is improved.

The invention provides a measurement method for self-elevating type mobile platform spud leg erection. Frameworks of measurement and control frames are provided with a rack through bolts and nuts, andsteel wires are connected with the nuts via through holes. The method includes the following steps of: making the measurement and control frames, assembling spud legs, fixedly tying the steel wires to the through holes, measuring three-dimensional data on a rack side and analyzing actual measurement data. According to the measurement method of the invention, the measurement and control frames aredisposed at both sides of a closing port for erection of upper and lower spud legs, each set of the measurement and control frames corresponds to each other through the steel wires, the rack side linearity and verticality are measured to check and control linearity and verticality data of a whole spud leg, and spud leg erection high altitude construction three-dimensional data are measured, so that the measurement method can accurately analyze local problems, has simple measurement, is free of high altitude construction and hanger plate obstacles, saves huge labor costs, and has the advantageof high work efficiency. The measurement method is suitable to be used as the measurement method for the self-elevating type mobile platform spud leg erection.

The invention provides a multi-point displacement meter for automatically measuring spatial displacement, including an explosion-proof online monitoring terminal, an explosion-proof bluetooth transmitter, a spatial displacement sensor, a wire, a drill pipe, a fixed pawl, and an end drill pipe. Adjust the length of each drill pipe according to the required measurement of rock layer separation, offset position and drilling depth, and then insert all the drill pipe parts into the drill hole, and the reference plate is close to the surrounding rock. When each rock layer is separated or offset, the rotating ball in the spatial displacement sensor rotates and the displacement telescopic rod extends. After that, the spatial displacement sensor will transmit the signal to the explosion-proof online monitoring terminal to process and store the data. When collecting data, the data is transmitted to the collector through the explosion-proof bluetooth transmitter. The invention combines the spatial displacement sensor, the drill pipe, the explosion-proof online monitoring terminal and the bluetooth device, and can accurately and scientifically study the movement law of the surrounding rock of the roadway in space, with real measurement and convenient installation.

The invention provides an optical water body flow velocity sensor and a flow velocity calculation method. The sensor device comprises a spherical pressure-resistant waterproof cabin; an MCU controller, a power supply, an attitude sensor, an electronic compass and a window velocity measurement module are arranged in the spherical pressure-resistant waterproof cabin in a sealing manner; the attitude sensor, the electronic compass and the window speed measurement module are all connected with the MCU controller, and the power supply supplies power to the MCU controller; the spherical pressure-resistant waterproof cabin is provided with a transparent optical window, and the window speed measurement module is arranged at the position of the transparent optical window. The sensor provided by the invention can directly measure and calculate the real water body flow velocity, is not influenced by environmental factors, can obtain the high-precision water body flow velocity, horizontal plane flow velocity and vertical flow velocity, has small influence on the water body flow velocity around the sensor, and can capture the rapid change of the water body flow direction and capture the small and medium-sized vortex phenomenon.

The invention provides a cold dry method online analysis sample gas treatment system. The system comprises a sampling unit, a sample gas treatment unit and a sample gas control unit which are connected through a sample gas pipeline; the sample gas treatment unit comprises a dust removal device, a dehumidification device and a phosphoric acid introduction unit arranged at the upstream of the dehumidification device; the phosphoric acid introduction unit comprises a first container for containing phosphoric acid and a vaporization device connected with the first container through a first micro pump; and the vaporization device is communicated with the sample gas pipeline. According to the invention, the phosphoric acid introduction unit is arranged before sample gas dehumidification, and phosphoric acid is dropped into the sample gas pipeline, so that the sample gas is in an acidic environment, the loss of SO2 and other water-soluble gases is effectively inhibited, and the measurement data of a rear-end gas analyzer is more real and accurate.

The invention discloses a novel wearable intelligent myopia treatment instrument integrated with preventing, treating and detecting functions. The novel wearable intelligent myopia treatment instrument mainly comprises movable equipment worn by a user and a system host used for collecting and storing eye use information of the user and detecting eyesight, wherein the system host comprises an eyesight detecting unit; the eyesight detecting unit comprises a graph display module for displaying eyesight detection graphs, a recognition module for recognizing a tested gesture, an ultrasonic detection module arranged on the graph display module, a processing module and an output module. By virtue of adopting the technical scheme, compared with the prior art, the novel wearable intelligent myopia treatment instrument integrated with preventing, treating and detecting functions, which is provided by the invention, has the advantages of avoiding operation during treatment and being free from risk, safe and reliable; during eyesight detection, gesture recognition is adopted, so that the detection is more specialized, and the measurement data is more real; eye use time record and fatigue reminding functions are added, so as to effectively supervise and urge a patient to protect eyes; an expert guidance function is added, so that a more suitable scheme is provided and the problems of improper use and the like of the patient are effectively avoided.

The invention discloses a differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device and a using method thereof. The upper end of a sample box (2) is connected with a sealing top cap (3), and the lower end is connected with a cylinder base (5) and a porous permeable plate (4). The outlet of a top cap air charging module (15) and the inlet of a top cap vacuum pumping module (17) are connected with the sealing top cap (3), and are further connected with a first precision digital barometer (13). The outlet of a base nitrogen charging module (16) and the inlet of a base vacuum pumping module (18) are connected with the cylinder base (5), and are further connected with a second precision digital barometer (14). The outlet of the top cap vacuum pumping module (17) and the outlet of the base vacuum pumping module (18) are connected with a vacuum pump module (19). The invention relates to a differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device which can effectively measure the medium radon precipitation rate of emanation rocks under different differential pressures.

The invention provides a measurement method for self-elevating type mobile platform spud leg erection. Frameworks of measurement and control frames are provided with a rack through bolts and nuts, andsteel wires are connected with the nuts via through holes. The method includes the following steps of: making the measurement and control frames, assembling spud legs, fixedly tying the steel wires to the through holes, measuring three-dimensional data on a rack side and analyzing actual measurement data. According to the measurement method of the invention, the measurement and control frames aredisposed at both sides of a closing port for erection of upper and lower spud legs, each set of the measurement and control frames corresponds to each other through the steel wires, the rack side linearity and verticality are measured to check and control linearity and verticality data of a whole spud leg, and spud leg erection high altitude construction three-dimensional data are measured, so that the measurement method can accurately analyze local problems, has simple measurement, is free of high altitude construction and hanger plate obstacles, saves huge labor costs, and has the advantageof high work efficiency. The measurement method is suitable to be used as the measurement method for the self-elevating type mobile platform spud leg erection.

The invention discloses a photovoltaic assembly incident angle impact factor test device. The test device comprises a double-shaft tracking support having a pitch angle drive and a rotation angle drive, wherein a photovoltaic assembly to be tested is installed on the double-shaft tracking support. The test device is characterized in that a temperature sensor is arranged on the back surface of the photovoltaic assembly; the double-shaft tracking support is provided with a weather tracking measurement instrument, a total radiation gauge, a dip angle measurement instrument and an assembly short-circuit current test module. The test device also comprises a collection control cabinet for collecting and recording a numerical number, and calculating and outputting a control instruction. The invention also discloses a photovoltaic assembly incident angle impact factor test method. By adopting the method and device, the information of various factors influencing the performance of the photovoltaic assembly can be automatically acquired and calculated by virtue of an industrial personal computer of the collection control cabinet so as to obtain an accurate incidence angle impact factor value; the test is simple and accurate.

The invention provides an intelligent measuring and controlling device for ship oscillation experiment, comprising a rigid support formed by an upper truss structure and four pile legs disposed at thelower end of the upper truss structure. The center of the upper truss structure is provided with a laser positioning device and a stepping speed regulation motor. The output end of the stepping speedregulation motor is connected to a cylinder-shaped rotating roller. Each pile leg is provided with a connecting ring, and each connecting ring is provided with a cylinder-shaped slipping ring. Each cylinder-shaped slipping ring is fixedly provided with a rotating wheel having a locking mechanism. Four rotating wheels are disposed on the same plane, and are respectively connected to a ship model through a steel rope. Four driving belt mechanism are respectively disposed between the cylinder-shaped rotating roller and the four cylinder-shaped sliding rings, and are disposed from top to bottom in a staggering manner. The invention is advantageous in that producing is facilitated; application is wide and operation is convenient; the measuring experiment result is more accurate, and the testing performance is better; the problem of measurement data errors due to limitation in traditional experiment methods and experimental facilities of a ship model towing tank can be resolved.

The invention relates to a transformer insulation state on-line monitoring device which comprises an industrial computer, a data acquisition card and a digital I / O card, wherein the data acquisition card and the digital I / O card are arranged on the industrial computer, the digital I / O card is connected with a power management unit, a signal conditioning unit and an amplifier unit are connected with a dielectric loss iron core measuring unit, the data acquisition card is connected with the amplifier unit and the dielectric loss iron core measuring unit, the amplifier unit is connected with thesignal conditioning unit, the signal conditioning unit is connected with a local discharge fronting plate, the dielectric loss iron core measuring unit is connected with a dielectric loss iron core fronting plate, the local discharge fronting plate is connected with a large sensor at the bottom of a sleeve and a two-in-one sensor at the tail screen of the sleeve, the dielectric loss iron core fronting plate is connected with the two-in-one sensor at the tail screen of the sleeve and an iron core grounding sensor for sending the acquired signal to the industrial computer for signal polarity identification, digital filtration and anti-interference processing, a local discharge of each phase of a transformer to be measured is computed, discharge times are counted and a discharge tendency chart is generated. The invention has the characteristics of good integrity, high measurement accuracy, simple software operation and capability of remote browsing.

A downhole power supply parameter acquisition system and control method based on a single chip computer. The system includes a downhole parameter acquisition unit and a surface parameter display unit. The downhole parameter acquisition unit is connected to the downhole power supply system, including a processor, a parameter measurement unit, a system reset unit, a parameter storage unit, a serial communication unit and a clock synchronization unit; the surface parameter display unit The unit includes a computer, a parameter display unit, a remote control unit, a memory management unit and a status display unit. The effect of the present invention: in the power supply of the intelligent drilling tool, by adding a parameter acquisition circuit, the working state of the downhole power system and the change of the voltage and current value of each link when the power system fails can be monitored and recorded, which is the power supply of the intelligent drilling tool The fault analysis and maintenance of the system provide objective and real measurement data, which avoids the hidden dangers of fault misjudgment and risk oversight caused by only relying on ground detection, and shortens the maintenance cycle of intelligent drilling tools.

The invention discloses a clamp for the mechanical property test of welding of a steel-bar truss, belongs to the device for fixing a test member, and particularly relates to a clamp for the shear resistance test of welding points of the steel-bar truss. The clamp is characterized by comprising a main hook, a positioning shaft, a sliding block, an adjusting bolt and a base which are connected, wherein the front end of the main hook is provided with a hook head which is provided with a sample opening groove, and the rear end of the main hook is provided with a positioning shaft sleeve; the positioning shaft connected with the sliding block is arranged in the positioning shaft sleeve in a sliding manner; the sliding block is arranged in a rectangular sliding groove arranged on the base in a sliding manner, and is connected with the adjusting bolt arranged on the side wall of the rectangular sliding groove; and a fixed plate is arranged under the base and is connected with a drawing machine. By utilizing the clamp disclosed by the invention, the test is carried out according to the steps of manufacturing a sample, installing the clamp, clamping the sample, adjusting the main hook, drawing and evaluating yield. The clamp disclosed by the invention has the advantages that the concept is novel, the structure is simple, the use is convenient and reliable, multiple purposes are achieved by one clamp and the application to the mechanical property test of multi-specification trusses can be achieved; and since the sample is manufactured at normal temperature, the operation is simple and convenient, the consumed time is less, the measured data is real, accurate and reliable, the efficiency is high and no energy consumption is caused.

The invention discloses a mechanical welding deformation measuring apparatus and a carriage frame joint welding technology optimization method. The measuring apparatus comprises a work platform, and two concave seats are symmetrically fixed on the work platform; a compression device is respectively connected with the two concave seats; a gauge stand support is arranged on the work platform; and a group of measuring instruments are fixed on the gauge stand support. The optimization method comprises: first of all, measuring the welding deformation of a welding joint; then processing measuring data to obtain the deformation amount of a loading section; establishing a whole-carriage beam unit model; and repeatedly executing the above steps on joints with different specifications in a carriage to obtain the welding deformation stress of the joints with the different specifications for storing in a database. The apparatus is simple in structure, convenient to operate, low in cost and high in precision, and can measure the bending and torsional deformation which are generated by the carriage frame joints in different forms during a welding process. The method can provide data support for optimal signal of a carriage structure, and provides an effective evaluation method for selection of a carriage joint welding technology.

The invention relates to a quasi-static in-situ biaxial tensile property testing instrument, and belongs to the field of precise scientific instruments. The quasi-static in-situ biaxial tensile property testing instrument includes a driving unit, a transmission unit, a clamping unit and a detection unit. According to the driving unit, two direct-current servo motors provide power sources for the X direction and the Y direction respectively, motor output torque is firstly decelerated and reversed through a turbine mechanism of the transmission unit, two pairs of four precise trapezoidal lead screw nut pairs in the X direction or the Y direction are driven, and the clamping unit is driven to complete linear motion; The clamping unit is used for clamping the test piece by virtue of a clamp body mounted on a sliding nut seat so as to realize load loading; the Y-direction clamp has a prefabricated inclination angle of 25 degrees, and the X-direction clamp is provided with a hinge. The quasi-static in-situ biaxial tensile property testing instrument has the advantages of small volume and compact structure, can be placed in most large-chamber scanning electron microscopes, and belongs to the field of precise scientific instruments. The in-situ biaxial tensile test in a plane stress state can be provided for a tested sample under a scanning electron microscope.

The invention belongs to an aero-engine measurement technology, and relates to a device for measuring the coaxiality of a bearing seat of an aero-engine combustion chamber casing. The device is characterized by consisting of a locating sleeve (4), a front needle rolling bearing (5), a front baffle ring (6), a rear needle rolling bearing (7), a rear baffle ring (8), an end cover (9), an end cover screw (10), a bracket (11), a bracket screw (12) and a dial indicator (15). The invention provides the device for measuring the coaxiality of the bearing seat of the aero-engine combustion chamber casing, so that the measurement problems of the diameter sizes of the components such as the bearing seat and a mounting side of the casing as well as the coaxiality and the jerk value of an engine rotor in the casing experiment can be solved, and the dynamic balance accuracy of the engine rotor can be guaranteed.