33results about How to "Easy and flexible measurement" patented technology

The invention discloses a method for measuring coating thickness and interfacial roughness simultaneously by ultrasonic and belongs to the technical field of ultrasonic nondestructive test and evaluation for materials. The method adopts an ultrasonic pulse echo detection system which comprises a sample table, an interfacial roughened coating sample, a delay block probe, a flow detector, a digital oscilloscope and a computer. Aiming to solve the difficult problem about measuring thickness and roughness of the nondestructive characterization interfacial roughened coating, the method includes deriving a sound pressure reflection coefficient amplitude spectrum /r(f;rq,d)/of the interfacial roughened coating structure, performing correlation operation to theoretical and experimental sound pressure reflection coefficient amplitude spectrums of different frequency bandwidth to obtain thickness di and roughness Rqi of the coating corresponding to the maximum correlation coefficient eta<max>(Rq,d) of each bandwidth, averaging thickness and roughness measured within different frequency windows to obtain mean d and mean Rq which are respectively the coating thickness and the interfacial roughness needed to solve. The method fills a gap in the coating thickness and roughness nondestructive characterization methods.

The invention relates to a software synchronization acquisition method of impulse laser light spot, which adopts ridge CCD camera which can output standard video signal or infrared camera, image collection card and measuring system which is formed by main control computer with capture software program. It collects data by ridge CCD camera or infrared camera and controls image collection card which is connected with ridge CCD camera or infrared camera by video cable through capture software program which is connected with image collection card. It collects the light impulse laser spots and achieves totally software synchronization acquisition and analysis in executing function.

The invention relates to an X-shaped fast positioning device for railway rail center position measurement. For the steel rail three-dimensional space posture observation in the prior art, a rail geometrical state measuring instrument needs to be put in a steel rail measuring position for positioning, and the collecting efficiency is lower. The X-shaped fast positioning device comprises a lower layer X arm and an upper layer X arm provided with center open holes, wherein the two arms are respectively straight arms, the upper and lower center open holes are aligned, crossed and combined for forming an X shape; a locking screw nut is arranged in each center open hole, a prism rod is inserted in each locking screw nut, the bottom end of each prism rod is a concave spherical surface, a semi-cylinder is arranged under the concave spherical surface, and is positioned on the surface of the steel rail, the bottom surface of the semi-cylinder is a flat plane, and the top surface of the semi-cylinder is a spherical surface; the end part of the lower layer X arm and the end part of the upper layer X arm are respectively provided with downwards steel rail clamp hook heads which are positioned at the two sides of the steel rail; fixing buckles are arranged between the same ends of the lower layer X arm and the upper layer X arm positioned at the opposite sides of the steel rail. The X-shaped fast positioning device has the advantages that the fast positioning of the high-speed railway rail center position can be realized through a full station instrument, the collecting efficiency is improved, the measurement is simple, convenient and flexible, and the measuring precision is also greatly improved.

The invention discloses a curvature measuring method and apparatus. The method comprises: a reference point position of a rotational freedom degree of a displacement sensor is set by using a normal direction of a first target point as a reference; the displacement sensor is controlled to rotate within a first preset angle based on the reference point position and measurement is carried out to obtain an absolute distance between the rotation center of the displacement sensor to the first target point; discrete processing is carried out on a to-be-measured object to obtain a preset number of second target points, a corresponding first Cartesian coordinate value when the displacement sensor measures each second target point and a first measurement value outputted by the displacement sensor, and a second Cartesian coordinate value of each second target point is calculated based on the first Cartesian coordinate value, the first measurement value and the absolute distance; and the curvature of each second target point is calculated based on the second Cartesian coordinate values. Because the Cartesian coordinate value of any point on the curved surface can be accurately calculated, the accuracy of curvature measurement is improved; and the measurement is more convenient and flexible.

The invention discloses a measurement and performance analysis system for a compressed air energy storage system. The measurement and performance analysis system is characterized by comprising a compressed air energy storage subsystem, a multi-factor disturbance quantity measurement and control subsystem, an air reservoir real-time heat transfer quantity measurement subsystem, and a dynamic characteristic and performance analysis subsystem. The measurement and performance analysis system can monitor and analyze the real-time heat transfer quantity of the air reservoir of the compressed air energy storage system under different inflation flow rates, deflation flow rates, maximum air storage pressures, external ambient temperatures, air reservoir surface wind speeds, air reservoir surface air humidity, and air reservoir surface smudginess, accurately grasps the dynamic operating characteristics of the compressed air energy storage system, and dynamically evaluates and analyzes the operation performance of the compressed air energy storage system.

The invention relates to a method and device for measuring the straightness of a rail transit locomotive bogie platform without a platform. A rubber mat is laid on the field; a supporting plate is placed on the rubber mat; a thimble is placed on the supporting plate; a laser marking instrument is arranged outside the rubber mat. Adjust the adjustable bracket of the laser marking instrument to make it horizontal and on a plane; hoist the bogie and place it on the thimble; adjust the casting parting surface of the bogie, and the parting surface and the horizontal light emitted by the laser marking instrument coincide until. Its structure includes a rubber pad, supporting plate, thimble, and laser marking instrument. A supporting plate is set on the rubber mat for the finished font, an thimble is arranged on the supporting plate, and a laser marking instrument is installed next to the rubber pad. The advantages are: the rubber pad can reduce the damage to the ground, the supporting plate forms a local stable structure, and then supports the bogie through the thimble to form a temporary measuring platform, which can measure the flatness flexibly and conveniently, and the operation is simple, reducing the number of operators Quantity; tooling is simple, easy to adjust, intuitive.

The invention relates to a circular groove medium diameter detecting ruler and a using method thereof, which belong to the field of pressure container and pressure pipe sealing and overcome the defects of inconvenient measurement and large errors in the prior art. The structure comprises a main ruler 1, a vernier ruler 2, two spherical measuring feet 3, two rotating shafts 4, a toggle slider 5, asliding clamp 6 and the like, wherein the vernier ruler 2 and the boss at the lower end of the toggle slider 5 pass through the middle groove of the main ruler 1; one rotating shaft 4 fixes one spherical measuring foot 3 on one end of the main ruler 1, the other rotating shaft 4 clamps the other spherical measuring foot 3 and the toggle slider 5 in the long groove of the main ruler and can slide in the long groove of the main ruler 1. The two spherical measuring feet 3 are placed in circular grooves in use, the main ruler 1 is rotated along the circular groove, and when the vernier ruler 2 moves to the maximum distance, the center distance between the two spherical measuring feet 3 is the circular groove medium diameter. The ruler and the method are applicable to medium diameter measurement for pressure container and pressure pipe-used flange ring connection surface sealing grooves and also all circular grooves.

The invention provides a device for measuring the axial clearance of a bearing with a shaft based on an automobile water pump, and relates to the technical field of measuring devices.The device comprises a measuring clamp assembly, a clamping disc is inserted into the top of a measuring base, and the measuring clamp assembly can clamp and fix bearings with different specifications and lengths so as to complete the subsequent measurement of the axial clearance; meanwhile, the driving control assembly of the device can accurately measure the axial clearance of the shaft connecting bearings with different specifications and lengths through the measuring clamp assembly, so that a fixing tool and a measuring tool do not need to be replaced, the measuring efficiency is greatly improved, and the problem that when an existing measuring device is used, the measuring precision is high is solved. The problems that in the prior art, a tool can only fix the shaft connecting bearing to measure the axial clearance, adaptability is poor, corresponding fixing and measuring tools need to be replaced when shaft connecting bearings of different specifications and lengths need to be measured, and the steps are tedious are solved.