"The Father of Virtual Instrument in China" Lets INV System Go to Each Laboratory

The destiny of virtual devices should be considered to have been doomed. For decades, he has devoted himself to the research of signal processing, virtual instrumentation, measurement and control technology, vibration and noise control, and has independently developed and completed the DASP virtual instrument library and the INV series of virtual instruments—mobile laboratories. The father of virtual instruments in China." However, whenever glory and praise rushed to him, he always said a faint phrase: “All I did was to make China’s scientific instruments with independent intellectual property rights on the international podium and change people’s lives. The habit of using foreign instruments is to allow China's independent innovation in signal processing and virtual instrument technology to go abroad and achieve universal access, and it hopes to make China's vibration and noise technologies develop in a more open direction."

Breaking through ten major world problems should be considered as the earliest proposed "virtual instrument" concept in China, the earliest proposed and realized "using software to manufacture instruments," and "combining hardware and software" to replace the traditional analog instruments mainly composed of hardware. scholar. The fruitful results stem from a solid accumulation. In 1965, he participated in the research on the nuclear noise explosion protection project of the National Defense - the nuclear noise and dynamics test analysis of the nuclear explosion of the underground railway. He found that the sinking displacement (0Hz) of the ballast bed could not be obtained with hardware equipment. In 1973, he began to attempt to solve this problem by replacing the traditional hardware with the digital integration and spectrum analysis of digital computers. He achieved success in 1979. This is the earliest successful example of virtual instrument module application. In the same year, at the national defense engineering conference (confidential meeting) for nuclear testing held by the National Defense Science and Technology Commission, the core concept of a virtual instrument—“software manufacturing equipment” was proposed. Academician Zheng Zhemin and director of the Institute of Mechanics, chaired the meeting Academician Zhang Wei, academician of Tongji University, and academician Li Guohao praised and supported the project, and it coincided with the concept of “software is the instrument” of American NI Corporation 7 years later. In 1993, the INV306 virtual instrument he developed under his leadership participated in the New Technology Exhibition in Toronto, Canada, and won high praise, ranking first on the list.

There are many technical difficulties in the development of virtual instruments, but they should always look forward to the direction and move forward. He not only founded the Institute of Oriental Vibration and Noise Technology (Eastern Institute), he developed the DASP and INV series of virtual instrument library systems, and achieved the concept of “turning the lab on the ground”, and achieved more than 100 innovative technologies. What is even more commendable is that Huai Ying and his team have also developed and solved ten world-wide technical problems, making the performance of virtual instruments and dynamic test and analysis instruments in China jump from high-precision, low-grade and low-grade measuring instruments to high-end, high-precision measurements. The leading level of the instrument.

First, virtual instrument library technology based on platform design. The DASP virtual instrument library system that should be researched by Huaiyu Group is the earliest virtual instrument library system developed in China. As early as in 1979, Huai Chen had proposed the core concept of virtual instruments—“software manufacturing instruments, replacing traditional instruments mainly composed of hardware” with hardware and software, and this landmark line of epoch-making significance. Instrument manufacturing and testing technology will have a tremendous impact on scientific instruments, analytical instruments, high-end instruments, and various electronic measuring instruments, as well as functions that cannot be achieved by hardware (such as ultra-low frequency and 0 Hz integrators), scientific research, and The national economy has a profound influence. In 1985, he proposed the goal of "kicking the lab away," and successfully developed China's first virtual instrument, successfully applied to the rocket excitation modal test of Hangzhou Qiantang River Bridge. In 1993, he exhibited at the Beijing New Technology Exhibition in Canada and won the first place on the praise list. In 1995, he successfully used the "Full Three Bales" rocket full arrow modal test. In 1996, he used the Shenzhou No. 1 manned spacecraft to launch. The modal test of the platform was successful. In 2004, the modal analysis of the system for the overweight training equipment of the astronaut was successful. Practice has proved that this is a set of virtual instrument systems with the most complete functions, the highest level of technology, and full national intellectual property rights, and represents the highest level of virtual instrument research and development in China.

Second, variable time base (VTB) transfer function (admittance) measurement analysis method. Compared with the traditional isochronous methods at home and abroad, time-varying base-station technology can significantly improve the accuracy and stability of transient excitation test results. At present, this technology has successfully solved the large-scale low-frequency structure hammer modal test problem with an elastic accommodating hammer, reaching the international advanced level and has obtained national invention patents. Completed tens of national key projects including the modal test of the 750-ton mobile launch platform of the Shenzhou spacecraft, the modal test of the “long three-bundle” large launch vehicle, the modal test of the Wuhai Yellow River Bridge, and the modal test of the astronaut overweight training machine. good.

Third, high-precision frequency, amplitude, phase and damping measurement techniques. Oriental's original high-precision frequency meter and amplitude meter overcome the limitations of frequency stepping and leakage in the FFT frequency analysis. The software's own frequency and amplitude can reach decimal 12 to 14-digit digital measurement accuracy. Equivalent to and can replace high-end frequency meters and voltage meters and other hardware devices. Currently, they have been used and promoted in China Metrology Institute and other units. The accuracy is improved by one million times compared to conventional methods in foreign countries, and the accuracy can be improved by 100 times from the standpoint of hardware alone. Increase the hardware frequency accuracy of the instrument from decimal 5 to 6 digits to 7 to 8 digits. This technology makes virtual instruments enter the ranks of high-end scientific instruments from general low-precision instruments and has significant international influence.

Fourth, ultra-low frequency signal fast measurement technology. For the accurate determination of ultra-low-frequency signals (0.1Hz to 0.00001Hz), especially for unknown frequencies, conventional measurements take a very long time to complete, while the Oriental method can achieve only 1/4 or less measurements. The periodic signal can obtain accurate frequency, amplitude, phase and distortion parameters, making the ultra-low frequency signal get fast measurement, filling the gaps at home and abroad. For a low-frequency signal test with a period of 100 seconds, it takes only 2 to 3 minutes to obtain parameters such as frequency, amplitude, distortion phase, and sensor calibration sensitivity. Compared to similar US HP35670 instruments, the time is shortened to 1/1. 20, and the latter also does not have the ability to measure multiple parameters simultaneously.

Fifth, the inverse entropy spectrum analysis method. The use of inverse entropy spectrum analysis is spectrum reanalysis, which can greatly improve the frequency resolution, especially for short-term sequences, and is more reliable than the LPC method proposed by foreign countries. It has been recognized by domestic and foreign experts and reaches the cepstrum. Analysis of the international advanced level.

Six, FFT / FT analysis method. Although the FFT transform greatly increases the operation speed but the frequency resolution is limited, for a finite-length signal, FFT/FT can be infinitely refined, and the frequency, amplitude, and phase of the main frequency and component accuracy can be obtained. One of the main methods of spectral refinement.

Seven, vibration holographic AVD "one into three out" real-time test analysis and innovation. For a long time, there has been no solution to the calculus of continuous real-time data at home and abroad. We should teach the task group to innovate and propose a full-scale calculus method. This method is particularly suitable for continuous acquisition of time series, fully taking into account the characteristics of the whole waveform, effectively avoiding the defects of the traditional calculus, so that in the long continuous signal acquisition process, innovative virtual channel technology can be obtained in real time after a second calculus The accurate waveforms realize the real-time and dynamic continuous measurement of the vibration hologram of AVD "one input and three output".

Eight, automated modal analysis methods. The modal test and analysis contain more technical content, and the operation is usually more complicated. It requires the operator to have quite a lot of theoretical knowledge and engineering experience before they can obtain more accurate results. However, through automated modal analysis, the general engineering personnel Expert modal analysis results can be obtained with a simple operation.

Nine, 24-bit "dual-core" variable-amplitude base A/D high-precision ultra-range 160dB data acquisition instrument technology. The 24-bit dual-core acquisition instrument has an ultra-wide range of 160dB, which not only guarantees that the large signal will not be overloaded, resulting in failure of the test, but also can ensure that the weak signal will not cause insufficient signal-to-noise ratio due to underload. Therefore, it is not necessary to consider the problem of instrument gears, and it is more suitable for difficult tests with special requirements.

X. Breakthrough the test of transfer function and the key technology of real-time control and inversion, opened up a new way to improve the measurement accuracy and range of the instrument.

The test of transfer function, real-time control and inversion is a world problem. It is proposed that the real-time and accurate test of the amplitude-frequency phase-frequency curve in the data mining process in real-time, and the real-time control and inversion of the transfer function through the YSL technology, has been successfully applied in the DASP software. This technology can greatly expand the scope of the instrument's frequency test, improve the test accuracy, very internationally competitive. This technology was put forward on December 9, 2010 and completed on December 24, making the virtual instruments created by China and the United States reach world-famous achievements that can win the Nobel Prize in physics. Its significance can be compared with the achievement of the "optical fiber communication" of Prof. Kao, the Nobel Prize winner.

Practice has proved that "software manufacturing equipment" saves a large number of expensive and bulky hardware materials and manpower, equipment, plant and energy, easy to produce, carry, through the network transmission can also achieve "cloud wisdom" scientific instruments. At present, it has been widely used in military defense, aerospace, and many other sectors to participate in the testing of hundreds of major national engineering projects such as rockets, Shenzhou spacecraft, bridge high-rise buildings, and large-scale mechanical equipment, achieving many conventional instruments and hardware that cannot be achieved. Features. According to incomplete statistics, there are more than 2,000 users in the East, and the cumulative economic benefits exceed 100 million yuan, saving the country hundreds of millions of dollars in foreign exchange. Its economic value is estimated based on the output value of China's equipment in 2007. If software is used instead of hardware, it will generate huge value of more than 100 billion yuan.

Promote virtual instrument technology to "reach the world"

Professor Ying has lectured at universities in more than 20 key universities in the country, such as Tsinghua University, Peking University, Zhejiang University, China University of Science and Technology, Shanghai Jiaotong University, Xi'an Jiaotong University and Hong Kong Polytechnic University. He successfully organized and hosted the 23rd National Vibratory and Noise Conference. The high-tech academic conference also trained a large number of urgently-needed personnel for vibration noise, signal processing, dynamic testing, and virtual instruments for related departments. At the same time, the joint guidance to train more than 30 master's, doctoral and postdoctoral graduate students, for the country to cultivate high-end talents in signal processing, dynamic testing and virtual instrument technology.

In the 1990s, the virtual instrument technology that should be developed by Huai Sheng has attracted extensive attention at home and abroad, and it has begun to show off in the market. However, due to overloaded work, long hours of overtime and excessive stress caused by excessive fatigue, on January 14, 1994, at the podium of the academic exchange conference of the Beijing University of Posts and Telecommunications, there should be sudden cerebral hemorrhage and rushed to hospital for first aid. Unconscious for 3 days, the left half of the body was unconscious, and after leaving the hospital, he was crutched. In 2003, sudden cerebral thrombosis. Sudden heart obstruction in 2004 and 2005...

"Three strokes, four myocardial infarctions, I have been to the king of the palace seven times, and the king has confiscated me." Speaking of this, it should be filled with emotion with a smile. Although the condition is now somewhat better, he is almost always in danger. The drug can only control his condition, but he can not let him completely get rid of the pain.

Hard work pays off. Today, the institute has initially established a research and development and market development team. “Now, our scientific research team has grown. We are all PhDs from the deputy director to the chief engineer and have strong scientific research capabilities.” He saw the development prospects of virtual instruments, and he must do his best to promote virtual instrument technology to “reach the world” The process of industrialization should continue to be full of confidence in the future. "Let the INV system go into each laboratory and let the DASP software run on each test bench." This is an ideal ideal.

Faced with the rapid development of today's science and technology, Huai Yu should also tell us that with the arrival of the "cloud computing" and "Internet of Things" era. In November 2009, Guilin National Virtual Instrument Conference and August 2010 National Vibration Engineering and Applications Conference in Shenyang, Ying Huai proposed laboratory network cloud era - "Cloud Intelligence Instrument Laboratory" and "Cloud Intelligence Fault Diagnosis Center" The idea is to propose that the country carry out relevant research as soon as possible. In addition, on this basis, we can also establish a cloud smart medical center and a cloud smart education center, a cloud smart security center, a cloud smart transport center, and so on, to help us seize high-tech high ground and promote the development of scientific instruments and scientific experiments. Gather high wisdom, promote high technology, reach the world's leading level, and formulate scientific and reasonable research plans and strategic steps.