1.The theoretical basis of inertial navigation
Speaking of the theoretical basis of inertial navigation, we must mention Newton's contribution to inertial navigation! Two important tools used in inertial navigation: Newton's second law and calculus are closely related to Newton.
Newton's second law tells us that dv/dt=a, and the relationship between distance and time is also obvious: ds/dt=v, so that distance is linked to acceleration. Distance and speed cannot be measured directly, but acceleration can. As long as you have acceleration, you can know the distance at every moment.
But reality is not one-dimensional, it is three-dimensional space. What do I do? At this point, we need to know the change in angle. Therefore, we also need an angular accelerometer (gyroscope). The invention of the gyroscope is also indebted to Newton. It was his study of the mechanics of high-speed rotating rigid bodies that provided future generations with the theoretical research that led to the invention of the gyroscope. Gyroscopes and accelerometers are the sensor part of inertial navigation.
In this way, the path of motion is related to the sensor measurable acceleration and angular acceleration. Inertial navigation is the complete calculation of the motion path by measuring these two instantaneous variables after a series of formula operations.
2. Advantages of inertial navigation
1. Inertial navigation does not require exogenous information for localization
Inertial navigation can be considered an antique, but today its position is still unshakeable. Both satellite navigation and radio navigation are limited by external information. Once satellites are unavailable and there are no navigation stations, these navigation systems will be completely paralyzed.
But inertial navigation doesn't need to use external information at all. The initial data it uses for calculation comes from itself, and it is neither affected by external interference nor sends any signal, let alone any other equipment, so inertial navigation is mainly used in the military.
2. Continuity of inertial navigation and positioning
The positioning of other navigation and positioning systems is a point, while the position of inertial navigation is a continuous curve, which is also a great advantage.
3. Limitations of inertial navigation
Of course, satellite navigation came into existence because of the determination of inertial navigation. Inertial navigation has a big limitation than other navigation: accumulation of errors. MCU operation is quantized and inevitably has errors, inertial navigation is continuously calculated, and the accumulated errors sometimes reach an unacceptable level, and the solution to this problem is usually compensation and correction: adjusting the position, velocity, and angular velocity at regular intervals to correct them.
4.Prospects for the application of inertial navigation
Inertial navigation is now widely used GPS, combined with BeiDou satellite navigation, made into a combination of navigation to use. GPS / BeiDou vehicle combination navigation system of inertial navigation.
In this way, you can use GPS, BeiDou satellite navigation and positioning in the external open environment; in the shade, high-rise buildings, viaducts, mountain tunnels, underground parking lots and other satellite signals are weak or even disappeared, can be automatically switched to inertial navigation to provide accurate navigation and positioning information.
Ltd. specializes in high-precision GNSS modules and wireless communication products, technology development and application promotion service providers, relying on the wireless communication technology in the field of R & D and promotion of experience, JUNODA set up a team with a wealth of experience in hardware and software development technology, aimed at domestic and foreign OEM / ODM customers and system integrators to provide high-quality, high-performance wireless modules and applications! We aim to provide high-quality, high-performance wireless modules and application programs to OEM/ODM customers and system integrators at home and abroad, and create long-term value for customers!
The company mainly provides integrated antenna module, dual-frequency high-precision module, single-frequency high-precision module, thousand-seeking high-precision module, Zhongke micro-positioning module, U-BLOX positioning module, SICOM communication module, inertial navigation DR module, UWM GNSS module, RTK differential module, 4G communication module and high-precision antenna, etc., the products are sold well in Beijing, Shanghai, Shenzhen, Guangdong, Jiangsu, Zhejiang, Sichuan, Hunan and other parts of the country. Our GNSS modules are widely used in many application fields, such as drones, vehicle security monitoring and dispatching, automatic bus stop announcement, DVR, car DVD navigation, GPS electronic dog, synchronized timing, high-altitude balloon monitoring, engineering machinery, industrial automation, etc. In the field of wireless communication products, the company is closely involved in the field of wireless communication, such as RTK differential module, 4G communication module and high-precision antenna.
In the field of wireless communication products, the company follows the latest development of international communication technology, introduces and acts as an agent for wireless communication modules that meet the market demand, and the products have a comprehensive layout from 2G, 3G, 4G, and are widely used in financial electronic payment, vehicle remote control, remote advertising information, repeater monitoring, mobile Internet terminals, smart home, remote medical care, network testing, enterprise information management, anti-theft alarm, Remote video transmission, intelligent meter reading, mobile computing, network navigation, voice phone, wireless gateway and other fields. Focused areas include video surveillance, network optimization, routers, POS and other M2M industry applications.
If you need to consult, please contact online customer service!
