Fiber optic gyroscope (FOG), as the core component of modern inertial navigation systems, has widely penetrated into many key fields such as aerospace, national defense and military industry, intelligent transportation, and ocean engineering due to its advantages of high precision, high reliability, no mechanical moving parts, and strong anti-interference ability. With the iteration and upgrading of global navigation and positioning technology, as well as the rapid rise of emerging applications such as drones, autonomous driving, and deep-sea submersibles, the performance requirements of fiber optic gyroscopes are constantly increasing, and the professionalism and efficiency of their testing equipment are also facing higher challenges. In this context, the dual axis testing turntable, with its unique technological advantages, has gradually replaced the traditional single axis turntable and become the mainstream choice in the field of fiber optic gyroscope testing. The market demand continues to rise, leading the development direction of the fiber optic gyroscope testing industry.

Industry development driven: The expansion of the fiber optic gyroscope market has generated a demand for upgrading testing equipment

In recent years, the Chinese fiber optic gyroscope industry has shown a high-speed growth trend, and the market size continues to expand. According to industry research reports, the market size of China's fiber optic gyroscope is expected to grow from about 15 billion yuan in 2024 to nearly 40 billion yuan in 2030, with a compound annual growth rate (CAGR) of 12.5%. The growth momentum mainly comes from the surge in demand in the fields of national defense and military industry, aerospace, intelligent transportation, etc. Among them, the aerospace industry is the core application scenario, and the demand for fiber optic gyroscopes will account for about 45% of the total national demand in 2024. It is expected to grow at a rate of 12% per year in the next few years; The annual growth rate of demand in the field of national defense and military industry is about 10%, and the annual growth rate in the field of intelligent transportation has reached 20%. The expansion of emerging application scenarios further promotes the dual improvement of fiber optic gyroscope production and performance requirements.

The performance of fiber optic gyroscope directly determines the accuracy and reliability of inertial navigation system, and its testing process is the key to ensuring product quality. Traditional fiber optic gyroscope testing often uses a single axis testing turntable, which can only simulate angular velocity in a single direction and perform performance testing, and cannot meet the testing requirements in complex scenarios. With the development of fiber optic gyroscopes towards high precision, miniaturization, intelligence, and integration, they need to withstand multi-directional attitude changes and angular velocity impacts in practical work. The limitations of single axis testing turntables are becoming increasingly prominent, and they cannot fully verify the stability and accuracy of products under complex working conditions. This has led to the demand for more efficient and comprehensive testing equipment, and dual axis testing turntables have emerged and rapidly risen.

Core advantages highlighted: Dual axis testing turntable meets high-end testing needs

The dual axis testing turntable achieves angular velocity simulation and attitude adjustment in two-dimensional space through the coordinated linkage of horizontal and vertical axes, which can more realistically reproduce the working scenario of fiber optic gyroscope in practical applications. Compared with the single axis turntable, it has irreplaceable technical advantages, which is also the core reason for its increasing demand.

Firstly, the testing efficiency has been significantly improved. The single axis testing turntable requires multiple adjustments to the installation angle of the fiber optic gyroscope in order to complete multi-directional performance testing, which is cumbersome and time-consuming; The dual axis testing turntable can achieve angular velocity loading and attitude simulation in both horizontal and vertical directions through dual axis linkage, without the need for repeated disassembly and adjustment, reducing single testing time by more than 30% and greatly improving testing efficiency in mass production, meeting the needs of large-scale production of fiber optic gyroscopes. For example, in the fiber optic gyroscope testing process of automobile manufacturing factories, the dual axis turntable can achieve full dimensional testing of gyroscopes related to vehicle posture, and the detection efficiency is more than three times higher than that of the single axis turntable.

Secondly, the testing accuracy is more guaranteed. The core performance indicators of fiber optic gyroscope include zero bias stability, scale factor accuracy, random walk, etc. The testing of these indicators requires extremely high realism in simulated scenarios. The dual axis testing turntable adopts a direct drive torque motor, modular precision shaft structure, and angular second level encoder, which can achieve high-precision angular velocity control and attitude positioning. The speed fluctuation is less than ± 0.1%, and the angular position error is ≤ 5; It can accurately simulate the complex motion state of fiber optic gyroscopes in aerospace, marine engineering and other scenarios, effectively avoiding testing errors caused by angle adjustment in single axis testing, and ensuring the accuracy and reliability of test data. In the testing of fiber optic gyroscopes related to shipborne laser communication, the dual axis turntable can effectively improve the tracking and control accuracy of the gyroscope through precise angle compensation, solving the problem of insufficient deviation feedback capability in traditional testing.

Thirdly, adapt to multi scenario testing requirements. With the continuous expansion of the application scenarios of fiber optic gyroscopes, their working environment is becoming increasingly complex, such as high-altitude attitude changes in the aerospace field, ship swaying in the marine engineering field, and vehicle steering in the intelligent transportation field, all of which require fiber optic gyroscopes to have multi-directional attitude adaptability. The dual axis testing turntable can achieve an ultra wide area pitch of 360 ° infinite rotation horizontally and vertically, building a comprehensive testing capability in three-dimensional space. It can adapt to the testing needs of different fields and models of fiber optic gyroscopes, and has stronger universality. Whether it is fiber optic gyroscope testing for tactical missiles or attitude sensor detection for drones, the dual axis turntable can provide accurate simulation of testing scenarios.

Technological iteration empowerment: Continuous optimization of performance of dual axis testing turntable

The continuous increase in demand for dual axis testing turntables is not only due to the expansion of the fiber optic gyroscope market, but also inseparable from the continuous iteration and upgrading of its own technology. Currently, the dual axis testing turntable is developing towards high precision, intelligence, and miniaturization, further meeting the testing needs of fiber optic gyroscopes.

In terms of precision improvement, by adopting advanced servo control technology, error compensation algorithms, and high-precision detection components, the angular velocity accuracy and angular positioning accuracy of the dual axis testing turntable continue to break through. Some high-end products have reached the micro second level, and the gap with the international advanced level is constantly narrowing. For example, a dual axis turntable using a high-precision grating encoder has a resolution of 0.0001 ° (approximately 0.36 °); ）It can meet the precision testing needs of high-end fiber optic gyroscopes. Meanwhile, error compensation methods based on artificial intelligence (AI) are gradually being applied, using machine learning models to compensate for residual nonlinear effects and unmodeled disturbances, further improving testing accuracy and stability.

In terms of intelligence, the dual axis testing turntable gradually integrates automation control system, data acquisition and analysis system to achieve automation and intelligence of the testing process. Operators can set test parameters and control the testing process through the computer. The system automatically collects test data, analyzes it, and generates test reports, greatly reducing human operational errors and improving testing efficiency. In addition, some high-end dual axis turntables also have functions such as remote control and multi device collaborative testing, which are suitable for the needs of large-scale and intelligent production. For example, in batch testing of fiber optic gyroscopes, multiple turntables can work together to further improve production efficiency.

In terms of miniaturization, with the advancement of micro machining technology and optical manufacturing technology, the volume and weight of the dual axis testing turntable continue to decrease, and the structural design is more compact, which can adapt to the installation needs of different scenarios such as laboratories and production lines, while reducing the transportation and maintenance costs of the equipment. For example, in response to the testing requirements of portable fiber optic gyroscopes, a miniaturized dual axis turntable can be flexibly deployed to meet the needs of on-site and mobile testing.

Market pattern and future trends: driven by both demand expansion and technological upgrading

At present, the domestic fiber optic gyroscope market is mainly dominated by leading enterprises such as Hikvision Robotics, Zhongke Xingtu, and Northern Optoelectronics. However, the market share is relatively dispersed, and the competitive landscape has not yet formed an absolute monopoly, which also provides a broad market space for dual axis testing turntable enterprises. With the acceleration of the domestic substitution process for fiber optic gyroscopes and the explosive demand in high-end application fields, domestic biaxial testing turntable enterprises have ushered in development opportunities, gradually breaking the technological monopoly of foreign enterprises and launching high-end products with independent intellectual property rights. The product performance continues to improve, and the cost-effectiveness advantage is increasingly prominent.

From the perspective of future development trends, the demand for dual axis testing turntables will continue to rise and present three major development directions. Firstly, the demand for high precision continues to upgrade. With the continuous deepening of the application of fiber optic gyroscopes in high-end fields such as aerospace, national defense, and military industry, the accuracy requirements for test turntables will be further improved. Micro angle second level accuracy will become the mainstream demand, and the requirements for error compensation technology will also continue to increase. AI based adaptive error correction algorithms will be more widely applied. Secondly, multi-sensor fusion testing has become a new direction. With the deep integration of fiber optic gyroscopes with sensors such as MEMS and LiDAR, the dual axis testing turntable will gradually have the ability to perform multi-sensor collaborative testing, meeting the testing requirements of integrated inertial navigation systems. Thirdly, the demand for customization is becoming increasingly prominent. Fiber optic gyroscopes in different application scenarios have different requirements for testing parameters and scenarios. In the future, dual axis testing turntable enterprises will provide customized testing solutions based on customer needs to further enhance product adaptability.

In addition, with the in-depth promotion of the "the Belt and Road" initiative and the implementation of the domestic regional coordinated development strategy, the application of fiber optic gyroscopes in the western development, northeast revitalization and other regions will gradually expand, indirectly driving the growth of demand for dual axis test turntables. At the same time, the government and enterprises will increase their investment in research and development, and carry out breakthroughs in key core technology areas such as special materials and high-sensitivity detection technology, promoting the continuous upgrading of dual axis testing turntable technology and helping the fiber optic gyroscope industry achieve high-quality development.

The rapid development of the fiber optic gyroscope industry has brought broad development opportunities to the testing equipment industry. The dual axis testing turntable, with its efficient, precise, and universal technical advantages, meets the demand for high-precision and large-scale testing of fiber optic gyroscopes, becoming the mainstream trend in the field of fiber optic gyroscope testing, and the market demand continues to rise. In the future, with the continuous iteration of fiber optic gyroscope technology and the continuous expansion of application scenarios, the dual axis testing turntable will usher in a new round of technological upgrades and market expansion, playing a more important role in ensuring the quality of fiber optic gyroscope products and promoting the development of the inertial navigation industry. For related enterprises, it is necessary to keep up with industry development trends, increase investment in technology research and development, optimize product performance, and enhance customized service capabilities in order to gain an advantage in the increasingly fierce market competition and achieve sustainable development.