Abstract:From the position of quality control and big data managing, the measure ability is discussed, include the concept, meaning, and value. In fact, the measure ability is all of the stimulate ability and controllability and testability of products. According to the technical target and ability requirements, the measure ability is divided into 5 technical levels. They are run through the design, manufacture, and application, full all of the live courses of products. Finally, In the course of upgrading the quality of products, the effect of measure ability is presented in detail.

Abstract:Since the depth data acquired by LIDAR is very sparse, a three-dimensional reconstruction algorithm based on sparse laser point cloud data and single frame image is proposed so as to reconstruct the 3D depth map from the depth data and image data in this paper. The proposed algorithm firstly uses the point histogram feature to effectively select the point data corresponding to the target and eliminate the non-similar points in the voxels. Then, the local depth data is modeled by Gaussian process regression, and the 3D depth data is obtained by interpolation. The 3D depth points obtained by our algorithm are closer to the reference value and keep the local shape feature of the object. Compared with existing 3D reconstruction algorithms based on LIDAR data and image data, simulation results show that the algorithm proposed in this paper will greatly enhance the robustness and reconstruction accuracy, and can be used for the unmanned vehicle in complicated urban scenes.

Abstract:In the process of assembly of large aviation composite parts, assembly clearance is inevitable, because the gap is small, when the component is fixed, the internal gap can not reach, so it is difficult to measure. Therefore, in order to overcome this problem, to complete the measurement of small gap in assembly, this paper proposes a method of assembly clearance measurement using reverse reconstruction and virtual assembly. Based on the background of the large aircraft composite parts measurement, combined with the principle of binocular vision measurement, this paper combines the measurement of vision and laser, studying the technology from point cloud obtained to the reconstruction of assembly simulation model, measuring the assembly gap by CATIA.

Abstract:So far most common conversion tables are not including the conversion relation between Surface Rockwell hardness HR15YW and other hardness. It is urgent to find the relation with the HR15YW and other hardness. This paper will focus on the conversion relation between HR15YW and HR15TW through a large number of experiments on three kinds of materials with different hardness and correlation analysis, curvilinear regression analysis. In this paper, there is a strong positive correlation relationship between HR15YW and HR15TW through a lot of experiments and correlation analysis, and get conversion relation between HR15YW and HR15TW, by using curvilinear regression analysis of the least squares estimate principle. The existing conversion tables are supplemented and the HR15YW could be converted other hardness.

Abstract:Through the research of numerical simulation on the flow field characteristics of an aeroengine test between the inlet, the flow characteristics of the flow field between the engine test, analyzes the error of flow measurement with the measuring section and probes into position changes, then according to the specific section and deep position, and studied the boundary layer thickness changes with different Maher numbers and different Reynolds number, finally make a systematic analysis on the flow coefficient measurement method in engineering. The results show that the boundary layer is thinner and thinner, and the pressure measuring point is more and more distributed to the central area, and the measuring speed is more and more close to the average velocity of the section when the measurement section moves toward the engine inlet. The Maher number has little effect on the flow coefficient and the flow coefficient increases with the increase of Reynolds number.

Abstract:The process of flow and heat transfer experiments in an aeroengine heat exchanger is presented in this paper，and given the summary and prosepect of flow and heat transfer measurement in aeroengine. In modern gas turbine expernments of the flow in an aeroengine Heat Exchanger is the key for the CCA system.High efficiency and compactness are the main feature for an aeroengine heat exchanger. Experimental data show the flow and heat transfer characteristics at different working conditions and obtain the local convection coefficient and the total pressure loss coefficient. PIV and MRI are useful for future research. The results are of benefit to modern aeroengine.

Abstract:Against heavy workload and long periodicity caused by dislocation performance testing of load feeling mechanism in operating system in aircrafts, based on modern measuring and controlling theory and technology, “in situ testing instrument for load feeling mechanism in operating system of aircrafts” is designed, which applies sensors, PLC and portable computer. The instrument can generate actual operating characteristic curve in real time with software through detected lengthwise direction and cross direction force and displacement of steering column, then compared with standard operating characteristic curve, performance of load feeling mechanism is evaluated. The tryout of the instrument shows that it can meet the needs of aircrafts maintaining crew because of its accurate detecting, convenient using, in situ and auto testing.

Abstract:This paper mainly expounds the aerodynamic design, CFD simulation, wind tunnel experiment, flight test of the total static pressure probe in the high-speed aircraft. The compensation surface of the total static pressure probe can be rapidly adjusted in the design phase through revolution body theory. It concludes the simulation of the static pressure through the commercial CFD software. The aerodynamic performance of the total static pressure probe that is designed should be verified through the wind tunnel test, and it should be ultimately verified whether it meets the requirements or not through the flight test.

Abstract:This paper introduces a kind of high temperature surface thermometer verification, adapted to the (50 ~ 700 ℃ high temperature range of surface thermometer calibration. To check the temperature of the uniformity and stability was tested. The verification hot plate surface has a ф 50 mm uniform temperature field, the highest temperature when the surface temperature uniformity is less than 2 ℃, the stability of the temperature field is less than 1 ℃ / 10 min. On the surface under high temperature checking instrument to evaluate the uncertainty, checking instrument calibration data show that it can be used in high temperature surface thermometer calibration.

Abstract:The metrological performance of flow meter should be tested under the condition of ambient temperature and humidity changes according to appendix A type evaluation outline of JJG 1033-2007 "Electromagnetic Flowmeter" verification procedures. In order to meet the requirements of the type of evaluation outline, an "environmental test on-line detection device based on flow metrological instrument" is developed. The pipe and the meter can be directly connected to this device. The metrological performance of the meter can be assessed and the environment’s temperature and humidity can be controlled at the same time. Experts have identified that the device can fully meet the requirement that metrological performance of flow meter can be tested under the condition of ambient temperature and humidity changes.

Abstract:A calibration method for the cross-coupling coefficients of linear accelerometers was researched in this paper. The calibration test was conducted on a precision centrifuge. The calculation of radius and the procedure of iterative regression method were analyzed in this paper. According to the principle of measurement, the source of alignment error were analyzed in the installation condition of both the crossed-axis and the transverse axis. The calibration accuracy was ensured by the calculation of radius,the definition of alignment error for nominal installation angle and the research of influence on the second-order coefficients by alignment error. The modeling method was established and the uncertainty of calibration result was analyzed.

Abstract:With the extensive applications of multi-component force measuring technology, the requirements of accuracy is more and more strict. The paper in the way of experiments verified the force load position must be in the effective range of the force platform to guarantee the measurement accuracy in the use of the piezoelectric force measuring platform. The paper acts a guide to the standard use of the multi-component force platform, it is of great significance to improve the measurement accuracy of multi-component force measurement platform.

Abstract:With the development of the aviation technology, it is necessary to construct a supersonic calibration wind tunnel which meets the needs of dynamic calibration of sensors. A measurement and control system for sensor calibration using in supersonic calibration wind tunnel has been designed based on TCP/IP protocol and LabVIEW. The theory of operation, structure of hardware and design of software has been explained. Through the system operation and performance testing, the system has the capacity of data communication and remote control, and meets the requirements of the calibrating testing in supersonic air.

Abstract:A calibration device which can calibrate angular rates of the two-axis position and rate rotary table is designed in this paper,and it is composed of circular grating, reading head, subdivision circuit, signal collection system and special calibration fixture.A portal frame with sliding rail and two reading heads is designed to eliminate the fix eccentricity error of circular grating ring. The morie fringes subdividing technology is used in the design of the signal collection and processing circuit, which reduces the error of the grating measurement greatly. It also designs a special calibration fixture with tunable dabber, which can simplify the installation and improve the efficiency of the calibration.?