CN108828531B - Method for processing radar data on FC bus simulation platform - Google Patents
Method for processing radar data on FC bus simulation platform Download PDFInfo
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- CN108828531B CN108828531B CN201810675818.1A CN201810675818A CN108828531B CN 108828531 B CN108828531 B CN 108828531B CN 201810675818 A CN201810675818 A CN 201810675818A CN 108828531 B CN108828531 B CN 108828531B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
Abstract
The invention relates to the field of radar data processing through a method for processing radar data on an FC bus simulation platform, which comprises the following steps: generating radar data on an FC simulation experiment platform; extracting azimuth angles, radial distances and gray values of each radar data target point, and then packaging the data into FC-AE-ASM frame radar data, wherein the FC-AE-ASM frame comprises a payload part and a descriptor part; storing the encapsulated radar data, and respectively storing a payload part and a descriptor part in two circular queue memory areas; the sending end sends radar data; reading radar data in the payload memory area by reading a base address and an offset in the descriptor memory area during sending; the receiving end carries out invalid data filtering on the received radar data according to a certain rule to obtain valid radar data; and analyzing and displaying the effective radar data. The invention solves the problems of large data volume, low data processing efficiency and high error rate of the existing radar data processing method.
Description
Technical Field
The invention relates to the field of radar data processing, in particular to a method for processing data when large-scale radar data are simulated on an FC network simulation platform.
Background
Fibre Channel (FC) is a Channel standard proposed by the american industry standards institute (ANSI) in 1988 to accommodate the rapidly increasing demand for high-speed data transmission. Fibre channel is a network communication protocol that can support multiple media and link devices. The method makes it possible to run the current popular channel standard and network protocol on the same physical interface, and has the advantages of high bandwidth, high reliability, high stability, electromagnetic interference resistance and the like. Fibre channel is a networking technology that can meet the requirement of high-performance data transmission, and the essence of the technology is system interconnection. The current achievable rate is 1/2/4/8/16Gbit/s, and technologies such as 32Gbit/s and 64Gb/s are researched. The fibre channel standards organization specifically established the avionics sub-division committee (ANSI FC-AE). The avionics committee mainly studies how the fibre channel technology is applied to the field of avionics. Various protocol specifications have been established. E.g., unsigned anonymous messaging (FC-AE-ASM), FC-AE-1553, FC-AV.
The FC-AE standard is a group of protocol sets of FC applied to avionic environment, is mainly used for data communication among equipment in the avionic environment, transmitting data such as video, finger control, instruments and meters, sensors and the like, and mainly comprises: FC-AE-1553, FC-AE-ASM, FC-AE-RDMA, FC-AE-FCLP, and FC-AEVI. The new generation avionics architecture is represented by the "jewel post" (Pave pilar) project in the united states, applied to the F-22 fighter and RAH-66 helicopter in the united states, using 1553 bus and HSDB (high speed data bus). Then, a plan of "stone table" (Pave tile) is proposed to further promote the integration, a higher-speed optical fiber data bus is adopted, and FC is one of representative technologies of fourth-generation and fifth-generation fighters. FC is currently used in FC-35, B1-B, F18E/F, V22, Apache and other models, and F-35 fighters adopt the latest optical fiber bus technology. From the overall domestic form of application, the FC-AE-ASM protocol has been pre-researched and validated, and some specific improvements have been made to the international standard protocol, and have been widely applied to the highly demanding military equipment.
FC is a high-speed serial transport bus proposed in 1988 by the X3T11 group of the american standards institute (ANSI), which addresses the technical bottleneck encountered by parallel bus SCSI and allows more FC-4 upper layer protocols to be mapped within the same large protocol platform framework. The FC has the advantages of being dual in channel and network, high in bandwidth, reliability and stability, resistant to electromagnetic interference and the like, capable of providing very stable and reliable optical fiber connection, easy to construct large-scale data transmission and communication networks, and capable of supporting bandwidth connection rates of 1x, 2x, 4x and 8x, and continuously expanding the bandwidth with continuous development of technology so as to meet technical performance requirements of higher bandwidth data transmission. The FC application in avionics mainly comprises: FC-AE, FC-AV (ARINC818) protocol 2 big branches. The FC-AE standard is a group of protocol sets of FC applied to avionic environment, is mainly used for data communication among devices in the avionic environment, transmitting data such as video, finger control, instruments and meters, sensors and the like, and mainly comprises: FC-AE-1553, FC-AE-ASM, FC-AE-RDMA, FC-AE-FCLP and FC-AEVI have 5 protocols, and the FC is currently used in FC-35, B1-B, F18E/F, V22, Apache and other models, and is one of the representative technologies of four-generation and five-generation fighters. From the overall domestic form of application, the FC-AE-ASM protocol has been pre-researched and validated, and some specific improvements have been made to the international standard protocol, and have been widely applied to the highly demanding military equipment.
Along with avionics system gradually develops towards the trend of synthesis, intellectuality, modularization and standardization, aviation network interconnection technology is more and more powerful, and fibre channel can fine satisfy novel avionics interconnection system requirement, becomes the first-selected network bus of novel airborne avionics system. Because the scanning targets of the airborne radar of the fighter plane can be complex, various and three-dimensional, the existing data targets are three-dimensional in the data encapsulation stage, and the encapsulation efficiency is low; in the data storage stage, the occupied storage space is large, and the storage efficiency is low; in the sending stage, errors can occur in data addressing and reading in the buffer area; the receiving processing part may have processing errors or low real-time data processing due to a large amount of data at the transmitting end.
In summary, the conventional radar data processing method has the problems of large data volume, low data processing efficiency and high error rate.
Disclosure of Invention
The invention aims to: the invention provides a method for processing radar data on an FC bus simulation platform, which aims to solve the problems of large data volume, low data processing efficiency and high error rate of the conventional radar data processing method.
The technical scheme of the invention is as follows:
a method for processing radar data on an FC bus simulation platform comprises the following steps:
step 1: generating radar data on an FC simulation experiment platform;
step 2: extracting azimuth angles, radial distances and gray values of each radar data target point, and then packaging the data into FC-AE-ASM frame radar data, wherein the FC-AE-ASM frame comprises a payload part and a descriptor part;
and step 3: storing the encapsulated radar data, and respectively storing a payload part and a descriptor part in two circular queue memory areas;
and 4, step 4: the sending end sends radar data; reading radar data in the payload memory area by reading a base address and an offset in the descriptor memory area during sending;
and 5: the receiving end carries out invalid data filtering on the received radar data according to a certain rule to obtain valid radar data;
step 6: and analyzing and displaying the effective radar data.
Specifically, the specific steps of step 1 are: connecting an FC network sending end and an FC network receiving end through an FC switch, setting DID and SID of the FC network sending end according to a port connected with the FC switch and the FC network receiving end, simulating and generating large-scale radar data through upper-layer application software, and filling DID and SID fields of an FC-AE-ASM frame header according to configured DID and SID.
Specifically, the specific steps of step 2 include:
cutting the radar data generated by simulation according to the path load of the ASM frame and using the cut radar data as the path load part of the ASM frame, then calculating the length of the path load and the number of bytes of filling data, and finally filling other descriptor entries to package the generated radar data into an FC-AE-ASM frame; the FC-AE-ASM frame includes a pay load portion and a descriptor portion.
Specifically, the specific steps of step 4 are: copying the encapsulated radar data frame into a DMA sending buffer area; and adding 1 to a write pointer in the descriptor queue of the sending end to inform hardware to send the ASM frame.
Specifically, the specific rule in step 5 is: and when the gray value of a radar target point in the radar data does not reach a set threshold value, the DMA module at the receiving end filters the target point, and reserves the target point of which the gray value of the point information in the radar data reaches the threshold value.
Specifically, in the parsing process in step 6, after passing through the ASM frame forwarded by the FC switch, the receiving end determines whether the ASM frame is an ASM frame according to the ASM descriptor specific field and the frame length information, and extracts the pay load part of the ASM frame according to the offset to obtain radar data.
After the scheme is adopted, the invention has the following beneficial effects:
the radar data encapsulation part encapsulates each radar data target point by extracting the azimuth angle, the radial distance and the gray value, so that the data is simple and clear, and the encapsulation accuracy is high; the data storage part is used for storing FC-AE-ASM radar frame data by setting two different memory areas, so that the storage efficiency is higher, and the memory space utilization rate is higher; a sending part, by reading the key fields in the per frame descriptor: the radar data is efficiently and quickly addressed by the first address and the address offset, and the addressing accuracy is higher; the receiving part deletes effective data through a certain rule and filters ineffective data, so that the capacity of receiving and processing big data is enhanced; the real-time performance of the display part is high.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a system structure diagram of an FC simulation experiment platform of the present invention;
fig. 3 is a diagram of a radar receiving interface of a PC2 port according to an embodiment of the present invention.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings.
The invention provides a method for processing radar data on an FC bus simulation platform, which aims to solve the problems of large data volume, low data processing efficiency and high error rate of the conventional radar data processing method.
The FC simulation experiment platform is designed based on an FC bus by adopting a switched topology structure on a win764 operating system, and can simulate the transmission and reception of radar data, video data and flight parameter data and display the data on terminal equipment. As shown in fig. 2, the FC bus simulation platform of the present invention includes a PC1 (simulation transmitter), a PC2 (simulation receiver), a PC1 (simulation transmitter), and a PC2 (simulation receiver) are hosts with HBA cards (FC-AE-ASM simulation cards) installed, respectively, the operating system is a win 764-bit operating system, the PC3 is a switch master, and the switch is an FC-AE16 port switch.
The invention relates to a method for processing radar data on an FC bus simulation platform, which comprises the following steps:
step 1: connecting an FC network sending end and an FC network receiving end through an FC switch, setting DI D and SI D of the FC network sending end according to a port connected with the FC switch and the FC network receiving end, simulating and generating large-scale radar data through upper-layer application software, and filling DI D and SI D fields of an FC-AE-ASM frame header according to configured DI D and SI D.
Step 2: extracting azimuth angles, radial distances and gray values of each radar data target point, and then packaging the data into FC-AE-ASM frame radar data, wherein the FC-AE-ASM frame comprises a pay load part and a descriptor part; specifically, the radar data generated by simulation is cut according to the path load of the ASM frame and is used as the payload part of the ASM frame, then the length of the path load and the number of bytes of filling data are calculated, and finally other descriptor table items are filled in, so that the generated radar data is packaged into the FC-AE-ASM frame.
And step 3: storing the encapsulated radar data, and respectively storing a pay load part and a descriptor part in two circular queue memory areas;
and 4, step 4: copying the encapsulated radar data frame into a DMA sending buffer area; adding 1 to a write pointer in a descriptor queue of a sending end to inform hardware to send an ASM frame; reading radar data in the pay load memory area by reading a base address and an offset in the descriptor memory area during sending;
and 5: the receiving end carries out invalid data filtering on the received radar data according to a certain rule to obtain valid radar data; the specific rule is as follows: and when the gray value of a radar target point in the radar data does not reach a set threshold value, the DMA module at the receiving end filters the target point, and reserves the target point of which the gray value of the point information in the radar data reaches the threshold value.
Step 6: and analyzing and displaying the effective radar data. In the analysis process, after the ASM frame forwarded by the FC switch, the receiving end judges whether the ASM frame is the ASM frame according to the specific field of the ASM descriptor and the frame length information, and the path load part of the ASM frame is taken out according to the offset to obtain radar data.
The present invention will be described below with reference to hardware systems in this embodiment:
in the system, a win 764-bit operating system PCIe HBA card (FC-AE-ASM emulation card) driver is used as a bottom implementation basis, and a memory is allocated in the driver initialization process, for example, to store a send descriptor queue and a receive descriptor queue, where the queue is used for sending and receiving FC data; and the memory blocks are distributed according to specific requirements.
At the PC1 end of the data transmission direction, data (such as radar data, video data and flight parameter data) are generated by simulation by upper layer software, then are packaged into FC-AE-ASM frames, the data are copied to a transmission buffer area, and the number of filling bytes is calculated according to the frame length. And filling and sending descriptor information, wherein the descriptor information comprises ASM frame header field information, and path load address and length information. The reserved field of the descriptor is used for distinguishing service information (radar or video or flight parameter), data generated by simulation is used as a pay load part of an FC-AE-ASM frame, and the DI D field of an FC-AE-ASM sending frame is filled in a port number of a receiving end of the switch and the PC2, so that the FC-AE-ASM frame data is encapsulated.
The receiving side, that is, the receiving side of the PC2, separates each service frame according to the reserved field of the FC-AE-ASM data frame sent from the PC1, counts the total frame number of each service frame, and then processes each service frame separately, including stripping the FC-AE-ASM frame header part, taking out the pay load data of each frame, processing, and displaying on the terminal interface, thereby realizing the decapsulation of the frame data.
Finally, the FC-AE16 port switch is used to perform routing configuration, link rate setting, data forwarding and statistics functions on the basis of the HBA card, and the FC-AE16 port switch has a monitoring function and can monitor according to certain conditions.
A specific simulation experiment was performed on the above scheme, as shown in fig. 2 above, which is the receiving interface of the FC network bus simulation platform, wherein the angle scanning range is 30-150 degrees, the timer is refreshed once in 40ms, the encapsulation structure of the radar point is the radial distance (the length from the origin) of 16bit, the gray value information of 16bit and the gray value are generated by a random function, the direct assignment larger than or equal to 255 is 255, the direct assignment smaller than 255 is 0, as the transmitting end DMA directly filters the point with the gray value of 0, reserves and transmits the radar simulation point with the gray value equal to 255, and after the receiving end processes the data, i.e., can be displayed on the terminal, the scheme is mainly applied when the sending end generates a relatively large amount of data, invalid data can be processed, and valid data can be reserved, so that the data processing capacity and the real-time performance are greatly enhanced.
Claims (4)
1. A method for processing radar data on an FC bus simulation platform is characterized by comprising the following steps:
step 1: generating radar data on an FC simulation experiment platform;
step 2: extracting azimuth angles, radial distances and gray values of each radar data target point, and then packaging the data into FC-AE-ASM frame radar data, wherein the FC-AE-ASM frame comprises a payload part and a descriptor part;
and step 3: storing the encapsulated radar data, and respectively storing a payload part and a descriptor part in two circular queue memory areas;
and 4, step 4: the sending end sends radar data; reading radar data in the payload memory area by reading a base address and an offset in the descriptor memory area during sending;
and 5: the receiving end carries out invalid data filtering on the received radar data according to rules to obtain valid radar data;
step 6: analyzing and displaying the effective radar data;
the specific steps of the step 1 are as follows: connecting an FC network sending end and an FC network receiving end through an FC switch, setting DID and SID of the FC network sending end according to a port connected with the FC switch and the FC network receiving end, simulating and generating large-scale radar data through upper-layer application software, and filling DID and SID fields of an FC-AE-ASM frame header according to configured DID and SID;
in the analysis process in step 6, after passing through the ASM frame forwarded by the FC switch, the receiving end determines whether the ASM frame is an ASM frame according to the ASM descriptor field and the frame length information, and extracts the payload part of the ASM frame according to the offset to obtain radar data.
2. The method for processing radar data on an FC bus simulation platform according to claim 1, wherein the specific steps of step 2 comprise: cutting the radar data generated by simulation according to the payload of the ASM frame and using the cut radar data as the payload part of the ASM frame, then calculating the length of the payload and the byte number of the filling data, and finally filling other descriptor entries to package the generated radar data into an FC-AE-ASM frame; the FC-AE-ASM frame includes a payload portion and a descriptor portion.
3. The method for processing radar data on an FC bus simulation platform according to claim 1, wherein the specific steps of step 4 are as follows: copying the encapsulated radar data frame into a DMA sending buffer area; and adding 1 to a write pointer in the descriptor queue of the sending end to inform hardware to send the ASM frame.
4. The method for processing radar data on an FC bus simulation platform according to claim 1, wherein the specific rule in step 5 is: and when the gray value of a radar target point in the radar data does not reach a set threshold value, the DMA module at the receiving end filters the target point, and reserves the target point of which the gray value of the point information in the radar data reaches the threshold value.
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| CN103888293B (en) * | 2014-02-25 | 2017-01-18 | 电子科技大学 | Data channel scheduling method of multichannel FC network data simulation system |
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