A multi-rate and multi-channel time-synchronized high-speed data recording system
A time synchronization, high-speed data technology, used in radio wave measurement systems, satellite radio beacon positioning systems, instruments, etc., can solve the problems of dynamic configuration, data cannot be time synchronized, and limit the flexibility of integrated navigation systems, to meet the needs of flexibility. The effect of configuration
Active Publication Date: 2019-10-08
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
Different types and models of navigation and positioning sensors have different communication rates and communication protocols. The main defect of the data recording system used in the current integrated navigation system is that the communication rate of each channel of the data recording system cannot be dynamically configured during use. It is necessary to modify the communication rate of each channel through special software after power failure; the time synchronization function of the data recording system is specially designed for a specific type of navigation and positioning sensor, and its time synchronization mechanism depends on the data protocol of this type of sensor, which cannot realize arbitrary navigation Time synchronization between positioning sensor data, when the connected navigation and positioning sensor is different from the navigation and positioning sensor that the data recording system was designed for, the time synchronization of each channel data cannot be achieved
The above two defects bring inconvenience to the engineering application of the integrated navigation system, which is mainly reflected in: due to changes in the application environment, accuracy requirements, and cost requirements, users need to replace the original navigation and positioning sensors in the integrated navigation system with new navigation and positioning sensors. If the communication rate of the sensor is inconsistent with the communication rate of the replaced navigation and positioning sensor, it is necessary to power off the integrated navigation system and reconfigure the data recording system, and the dynamic configuration of the communication rate cannot be realized
If its communication protocol is inconsistent with the communication protocol of the replaced navigation and positioning sensor, the data of the newly added navigation and positioning sensor cannot be synchronized with the data of other channel navigation and positioning sensors
The above two shortcomings of the existing data recording system limit the flexibility of the configuration of the integrated navigation system, resulting in users being unable to flexibly select the combination of navigation and positioning sensors according to their needs. Therefore, a new multi-rate multi-channel time-synchronized high-speed data recording system is required system, which can dynamically configure the communication rate of each channel, and can realize the time synchronization function independent of the communication protocol of each channel navigation and positioning sensor
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[0024] The technical solution of the present invention will be clearly and completely described through examples below.
[0025] see figure 1 , a multi-rate multi-channel time-synchronized high-speed data recording system is composed of a data receiving module, a synchronous clock module, a data synchronizing module, an electronic hard disk and a data playback module. In this embodiment, a satellite navigation receiver is also included. The data receiving module, data synchronization module and synchronous clock module are implemented by Xilinx Spartan-6FPGA, the electronic hard disk is Samsung SATA (Serial Advanced Technology Attachment) interface electronic hard disk, and the satellite navigation receiver is Trimble BD930. The data receiving module is used to receive navigation positioning sensor data, and the navigation positioning sensor that needs to gather data includes in the present embodiment: inertial navigation system (comprising 3 gyroscopes and 3 accelerometers), ...
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The invention aims at a problem that the communication rate of each channel of a multi-channel data recording system in the prior art cannot be dynamically configured during use and problems related to the time synchronization mechanism of each channel and a specific navigation and positioning sensor, and relates to a multi-rate multi-channel time synchronization high speed data recording system.The system comprises a data receiving module, a synchronous clock module, a data synchronization module, an electronic hard disk and a data playback module. The rate of each channel can be dynamicallyand independently configured, time synchronization of each channel is realized based on the data receiving module, the synchronous clock module, the data synchronization module and the data playbackmodule, and time synchronization of the data of each channel is realized through the initial global timestamp of each channel data flow without relying on a specific data protocol of the specific navigation and positioning sensor. The system is advantaged in that flexible configuration requirements of an integrated navigation system can be satisfied, so that the integrated navigation system can berealized through an optimal navigation and positioning sensor combination.
Description
Technical field: [0001] The invention relates to the field of data recorders, in particular to a multi-rate multi-channel time-synchronized high-speed data recording system. Background technique: [0002] In order to meet the needs of high-precision navigation and positioning, the navigation and positioning sensors with complementary characteristics are integrated into an integrated navigation system, which can obtain all-weather high-precision navigation and positioning information, which is of great significance to people's production and life. The high-precision synchronous recording of navigation and positioning sensor data is the key technology of the integrated navigation system, which can be realized by a multi-rate and multi-channel time-synchronous data recording system. Different types and models of navigation and positioning sensors have different communication rates and communication protocols. The main defect of the data recording system used in the current inte...
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IPC IPC(8): G01S19/42G01S19/48G01S19/49
Inventor 曹聚亮铁俊波吴美平王林王明皓
Owner NAT UNIV OF DEFENSE TECH