3. Diversification of measurement methods (1) Application of multi-sensor fusion technology in the manufacturing field Multi-sensor fusion is a method to solve the measurement information acquisition in the measurement process, which can improve the accuracy of measurement information. Since multiple sensors acquire information in different ways or from different angles, it is possible to use the information fusion between them to falsify the truth and improve the measurement accuracy. Previous page Chunlei Quntification Co.,Ltd , https://www.hychunleitools.com
(2) Building block type, combined measuring method The body-in-white three-dimensional size measuring system belongs to this type of measuring method. It can also be called a special coordinate measuring machine with good flexibility. The key lies in the establishment of the system.
(3) Portable measuring instruments such as portable optical interferometers, portable large-scale three-dimensional measuring systems, etc., are often used to solve large-scale measurement problems in the field.
(4) Virtual instrument virtual instrument is the application of virtual reality technology in the field of precision testing. There is in-depth research in China: one is to virtualize a variety of digital test instruments into a digital intelligent test instrument supported by computer as hardware. The other is to study virtual measurements in virtual manufacturing, such as virtual gauges, virtual coordinate measuring machines, and so on.
(5) Intelligent organization Intelligent mechanism belongs to structure detection and fault diagnosis. It is an interdisciplinary subject integrating intelligent technology, sensing technology, information technology, bionic technology, material science, etc., making the concept of monitoring transition to online, dynamic and active. Real-time monitoring and control. 
4. Measurement scale continues to develop towards two extremes
The so-called two extremes refer to the large size and small size relative to the current measurement size. A variety of test methods can be used for the measurement of the usual size. In recent years, due to the rapid development and urgent needs of the national economy, the testing requirements in many aspects of production and engineering have exceeded the scope of our testing. Such as the measurement of the shape of the aircraft, the measurement of key parts of large machinery, the collimation measurement of the elevator guide rails of high-rise buildings, the on-site calibration of tank trucks, etc., all require large-scale measurement; the rapid development of microelectronics technology and biotechnology, and the exploration of substances The micro-world needs, measurement accuracy, and micro- and nano-tests are required.
(1) Large-scale measurement methods such as engineering geodetic methods are a new measurement method, which refers to the transplantation and improvement of certain principles and methods of geodesy into mechanical engineering measurements. In addition, there are other methods for measuring large sizes, such as laser tracking interference 3D measurement systems.
(2) Nano-testing technology From the perspective of manufacturing, the permissible tolerance is reduced by 1/3 every ten years, so the measurement is required to have higher and higher precision and traceability to international standards (ISO). Of course, nanometer measurement is also various, including optical interferometer, quantum interferometer, capacitance micrometer, X-ray interferometer, frequency tracking Fabry calibrator, scanning electron microscope (SEM), molecular measuring machine M3 ( Molecular Measuring Machine), scanning tunneling microscopy (STM) and atomic force microscopy. 
5. Achieve various traceability requirements
(1) Self-calibration, self-calibration High-precision measurement requires high-precision traceability. In many cases, it is difficult to find an instrument that meets the accuracy requirements. The important reason is that traceability restricts the development of measurement accuracy and, in some cases, can be utilized. The self-calibration and virtual measurement methods of the measuring instrument solve the traceability problem.
(2) On-site direct calibration More and more measuring instruments now require direct calibration, and many are still three-dimensional spatial calibrations, so the development of on-site calibration techniques and instruments is the key to these calibrations.
(3) The traceability of nano-traceable nanometer testing is also an important issue. It has been reported in the United States that NST, German PTB, and Japanese NRLM have found that the interplanar spacing of silicon (220) crystals has good stability at constant temperature and can be used to establish nanometer traceability benchmarks.