Multi-stage distribution time-frequency unified method for large-scale integrated sensor system
A unified method and sensor technology, applied in the direction of time division multiplexing system, multiplexing communication, generating/distributing signals, etc. It does not support issues such as receiving the reference frequency, and achieves the effect of being beneficial to system joint testing, fault isolation, and clear and concise connection relationship.
Active Publication Date: 2019-05-17
10TH RES INST OF CETC
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Generally, in order to meet the time-frequency unified index of a large number of time-frequency application terminals, it is necessary to obtain the reference frequency and reference time from the time-frequency reference module. First, the time-frequency reference module is limited by internal resources and interfaces, and does not have the ability to output a large number of reference time-frequency Secondly, there will be a lot of cross-linked cables between the time-frequency reference module and the time-frequency application terminal, which is not conducive to engineering joint testing and troubleshooting
Finally, when the performance requirements of the time-frequency application terminal are high or low, if the same design is carried out according to the highest index, the resource overhead of the time-frequency reference module and the distribution overhead of the reference time-frequency will also be increased, and because the time-frequency application terminal resources in the system The composition and interface are different. Some time-frequency application terminals have FPGA resources and can receive high-precision time and receiving reference frequency transmitted through discrete lines at the speed of light. Some time-frequency application terminals can only receive high-precision time transmitted through discrete lines at the speed of light. , but does not support receiving the reference frequency, and some time-frequency application terminals only have modules with CPU resources, which can only receive network data packet timing. Such time-frequency application terminals cannot receive high-precision time transmitted at the speed of light through discrete lines
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] refer to figure 1 . In a large-scale radio frequency integrated electronic system, the indicators of all sensors in the system to the reference frequency mainly include indicators such as high accuracy, long-term stability, short-term stability, phase noise, spurious and harmonics; the reference time-frequency generation module belongs to the system The common module, which generates the reference time and reference frequency, is deployed in the same rack as the system resources. The generation of the reference frequency adopts the design of an atomic clock combined with a constant temperature crystal oscillator. The generation of the reference time can use the high-precision UTC time obtained by the high-precision timing satellite navigation receiver, or the high-precision data link coordination time obtained by the two-way time transfer comparison technology. , and the inertial navigation time or RTC clock chip time in the system can also be used. The reference time...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a multi-level distribution time-frequency unification method for a large-scale integrated sensor system. The invention aims to provide the multi-level distribution time-frequency unification method with reliable time-frequency unification and the reduction of resource overhead. The method is implemented by the following technical scheme: a reference time-frequency generation module distributes a reference time and a reference frequency to a time relay module through a point-to-point discrete line, and the time relay module continues to distribute the reference time to aclass 1 time-frequency terminal and a class 2 time-frequency terminal, a frequency network controller transmits the reference time to a network, the class 1 time-frequency terminal and the class 2 time-frequency terminal synchronize with an externally inputted reference time in real time, wherein the class 1 time-frequency terminal adopts a reference frequency inputted by a frequency relay modulewithin a synchronization interval to carry out time keeping, the class 2 time-frequency terminal adopts a frequency source of the time-frequency terminal to carry out time keeping, and a class 3 time-frequency terminal adopts real time and time data packets received by a network to carry out synchronization, and a time chip is used to carry out time keeping to carry out multi-level distribution in time-frequency unified architecture.
Description
technical field [0001] The present invention relates to an industrial field of avionics technology, which is mainly used in integrated sensor systems, and provides a method for classifying time-frequency application terminals based on time-frequency index-oriented requirements. Different designs are carried out for different classifications, and a multi-level cascade distribution architecture design is adopted. , to improve time-frequency unification performance and reduce resource overhead time-frequency unification method. Background technique [0002] The avionics system of hardware integration, software integration, information integration and function integration is becoming more and more complex, and the degree of integration is getting higher and higher. Synthesis has advanced from displays to data processing to sensor systems. In such a system, a variety of shared resource modules are used to realize various functions, and the boundaries of traditional sub-systems c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06G06F1/14
CPCG06F1/14H04J3/0638
Inventor 刘文焘段求辉钱东芮锡李亚军
Owner 10TH RES INST OF CETC