CN114157732A - Telemetry data analysis method and system for large and medium-sized fixed wing unmanned aerial vehicle - Google Patents
Telemetry data analysis method and system for large and medium-sized fixed wing unmanned aerial vehicle Download PDFInfo
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Abstract
The invention discloses a method and a system for analyzing telemetering data of large and medium-sized fixed wing unmanned aerial vehicles, which comprises the following steps: step 1, carrying out ICD interface configuration on an unmanned aerial vehicle telemetering data communication protocol by adopting an XML format language to obtain ICD interface configuration information in an XML format; step 2, realizing a dynamic link library by using an object-oriented programming method; step 3, reading data block information, data field information and conversion method information in the ICD interface configuration information, and creating a data block container, a data field container and a conversion method container; and 4, analyzing the telemetering data buffer area to obtain a frame identification code and telemetering data, and analyzing and storing the telemetering data in the telemetering frame data buffer area to obtain an actual value of a telemetering frame data field. The invention effectively reduces the workload of program modification brought by the protocol change of the telemetering frame, has better expandability and improves the universality of ground station software.
Description
Technical Field
The invention belongs to the technical field of unmanned aerial vehicle data processing, and particularly relates to a telemetry data analysis method and system for a large and medium-sized fixed wing unmanned aerial vehicle.
Background
Along with the rapid development of unmanned aerial vehicles and other related neighborhood subjects in recent years, the unmanned aerial vehicles have developed powerful weapons integrating reconnaissance and attack, and in the future, the unmanned aerial vehicles have the attack capability of completely and autonomously completing remote attack and even air combat tasks, in particular to fixed wing unmanned aerial vehicles (namely unmanned aerial vehicles with fixed wings, wherein the sweepback angles of the outer ends of the wings can be automatically or manually adjusted along with the speed), due to excellent functions and modularized integration, the unmanned aerial vehicles can be initially applied to the fields of surveying and mapping, geology, petroleum, agriculture and forestry and the like, and along with the rapid development of the technology of the unmanned aerial vehicles, the application of the unmanned aerial vehicles is expanded more widely.
In the unmanned aerial vehicle system, communication data between an unmanned aerial vehicle flight control computer (hereinafter referred to as a flight control computer) and a ground command control station (hereinafter referred to as a ground station) can be generally divided into: telemetering data sent to the ground station by the flight control machine, and remote control data sent to the flight control machine by the ground station. The current state data of the unmanned aerial vehicle and the control instructions issued by the ground station are encapsulated and identified according to a specified Interface Control Document (ICD). Therefore, parsing the telemetry frame of the flight control machine according to the ICD also becomes one of the most basic functional building blocks of the ground station.
The process flow of telemetry data by the ground station is shown in figure 1. After the ground station receives the telemetering data from the flight control computer through the ground line-of-sight link terminal, the telemetering data frame which accords with ICD standards is identified in the received data buffer area according to information such as frame synchronization words, frame length, frame verification and the like. In addition, in the process of developing and maintaining the unmanned aerial vehicle system, versions of ICD (interface control document) protocols of a ground station and a flight control machine are frequently changed frequently, and the protocol analysis work and maintenance workload of the ground station are huge.
Therefore, how to record the protocol rules of the telemetry data frames in the ground station becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Aiming at the problem of large workload of analyzing a ground station protocol in the prior art, the invention aims to provide a method and a system for analyzing telemetry data of a large and medium-sized fixed wing unmanned aerial vehicle, wherein an XML format markup language is used for abstractly managing an ICD protocol, telemetry data frames are automatically analyzed, telemetry data protocol rules can be simply, conveniently and clearly recorded for the ground station, and the workload of analyzing the ICD protocol of the ground station is greatly reduced.
In order to achieve the purpose, the invention adopts the following technical scheme to solve the problem:
a telemetry data analysis method for large and medium-sized fixed wing unmanned aerial vehicles comprises the following steps:
step 1, carrying out ICD interface configuration on a telemetering data communication protocol of the unmanned aerial vehicle by adopting an XML format language to obtain ICD interface configuration information in an XML format, wherein the ICD interface configuration information comprises data block information, data field information and conversion method information, and the attributes and the interactive relationship of the data block information, the data field information and the conversion method information are divided;
step 2, according to the ICD interface configuration information in the XML format obtained in the step 1, and the attributes and the interactive relationship of the data block information, the data field information and the conversion method information, a dynamic link library is realized by an object-oriented programming method, and comprises a reading unit, an analysis unit and a searching unit;
step 3, calling a reading unit of the dynamic link library in the step 2, respectively reading data block information, data field information and conversion method information in the ICD interface configuration information, creating a data block container, a data field container and a conversion method container, sequentially adding the conversion method container to the data field container, and adding the data field container to the data block container;
and 4, calling an analysis unit of the dynamic link library in the step 2 to analyze the telemetering data buffer area to obtain a frame identification code and telemetering data, then calling the data block container, the data field container and the conversion method container obtained in the step 3, analyzing and storing the telemetering data of the telemetering frame data buffer area received by the ground station to obtain an actual value of a telemetering frame data field.
Further, the data block container comprises a readBlockConfig function and a parseBlockBuff function, wherein the readBlockConfig function is used for reading data block information, and the parseBlockBuff function is used for analyzing the data block information in the telemetry data;
the data field container comprises a readSegmentConfig function, a parsSegmentBuff function and a getValue function, wherein the readSegmentConfig function is used for reading data field information, the parsSegmentBuff function is used for analyzing data field information in the telemetering data, and the getValue function is used for acquiring an actual value of a data field of the telemetering data;
the conversion method container comprises a readConversionConfig function, a decodeValue function and an encodeValue function, wherein the readConveronConfig function is used for reading conversion method information, the decodeValue function is used for converting a field coding value into a field actual value, and the encodeValue function is used for converting the field actual value into the field coding value.
Further, the step 3 comprises the following operations:
step 31, the ground station calls a reading unit in the dynamic link library to read a list of data block information in the ICD interface configuration information obtained in the step 1;
step 32, selecting data block information in the data block information list, creating a data block container, calling a readBlockConfig function of the data block container, reading the data block information, initializing the attribute of the data block container, and adding the data block information into a data block container list of a dynamic link library;
step 33, selecting data field information in the data block information, creating a data field container, calling a readSegmentConfig function of the data field container, reading the data field information, and initializing the attribute of the data field container;
step 34, creating a conversion method container according to the type of the conversion method carried by the data field information in the step 33, calling a readconvertionconfig function in the conversion method container, reading the conversion method information, and initializing the attribute of the conversion method container;
step 35, adding the conversion method container to the data field container, and then adding the configured data field container to the field list of the data block container;
step 36, if the data block information contains unread data field information, returning to step 33 to read the next data field information, otherwise, ending step 3;
step 37, if the data block information list has unread data block information, returning to the step 32 to read the next data block information, otherwise, ending the step 3.
Further, the step 4 comprises the following operations:
step 41, the ground station calls an analysis unit of the dynamic link library in the step 2 to analyze a telemetering frame data buffer area to obtain a frame identification code and telemetering data;
step 42, searching a corresponding data block container in a dynamic link library according to the frame identification code;
step 43, if the matched data block container is not found, returning to failure, and ending the analysis process;
step 44, if the matched data block container is found, calling a parseBlockBuff function of the data block container, and analyzing the telemetering data obtained in the step 41 to obtain data field information; calling a search unit of the dynamic link library to search a data field container in the data block container;
step 45, calling the parsesegmentmbuff function of the data field container in the step 44, and analyzing the configured data field information in the data field container to obtain the attribute of the data field information, namely obtaining the field coding value;
step 46, calling a decodeValue function of the conversion method container in the data field container in the step 45, converting the field coding value obtained in the step 45 into a field actual value, and storing the field actual value in the data field container in the step 45;
and 47, repeating the step 45 and the step 46, and analyzing the field list of the data block container in the step 44 to obtain the actual value of the data field of the telemetry frame.
Further, the parsing method further includes:
and 5: and (3) the ground station searches the appointed data block and data field through the search function of the dynamic link library in the step (1), acquires the appointed data field container, obtains the actual value of the telemetry frame data field, and displays the actual value on the display module.
Further, the ICD interface configuration information is composed of at least one data block, where the data block is composed of at least one data field, and the data field includes a conversion method.
On the other hand, the invention also provides a system for realizing the method for analyzing the telemetering data of the large and medium-sized fixed wing unmanned aerial vehicle, wherein the analyzing system comprises a dynamic link library, and the dynamic link library comprises a reading unit, an analyzing unit and a searching unit;
the reading unit comprises a reading function readStreamConfig used for reading a list of data block information in the ICD interface configuration information in the XML format;
the analysis unit comprises an analysis entry function parseRecvBuff used for analyzing a telemetry data buffer area received by the ground station;
the lookup unit includes a lookup function findDataSegment for looking up a specified data field container.
Compared with the prior art, the invention has the following technical effects:
1. the invention realizes the abstract configuration and management of the telemetering data frame protocol of the unmanned aerial vehicle through the XML format, adopts the telemetering data frame protocol of the unmanned aerial vehicle managed by the XML format, can greatly reduce the workload of realizing and maintaining the ground station caused by ICD change, can be expanded by methods of increasing field types, conversion formulas and the like, is suitable for unmanned aerial vehicle systems of other types, and has strong universality.
2. The method encapsulates the telemetry data analysis method into a portable dynamic chain library, so that the telemetry data analysis method has better universality and analysis of the telemetry data of the flight control machine is realized.
In conclusion, the method of the invention effectively reduces the workload of program modification brought by the change of the telemetry frame protocol, has better expandability and improves the universality of the ground station software.
Drawings
FIG. 1 is a telemetry data processing flow for a ground station;
FIG. 2 is a flow chart of a method for analyzing telemetry data of a large and medium sized fixed wing drone according to the present invention;
FIG. 3 is a schematic diagram of data block information;
FIG. 4 is a schematic diagram of data field information;
FIG. 5 is a schematic diagram of a data container for a dynamic link library ICDLib;
FIG. 6 is a flow diagram of a data chunk container, data field container, and transformation method container configuration;
fig. 7 is an analysis flowchart.
The invention is further explained below with reference to the drawings and the detailed description.
Detailed Description
First, the relevant knowledge involved in the present invention is described:
the telemetry data for the drone system consists of a plurality of telemetry data frames. The measurement information, the state information and the feedback information of the remote control command of the unmanned aerial vehicle airborne equipment are encapsulated in a telemetering data frame and are sent to a ground control command center according to a certain period in a circulating mode, so that the current flight and working states of the unmanned aerial vehicle are provided for ground commanders. A telemetry data frame is usually composed of a frame head, a frame tail and a data area, wherein the frame head is a synchronization word and is used for a receiving end to identify a start-stop range of the data frame, and the frame tail is composed of a checksum and is used for verifying the transmission correctness of the telemetry data frame; the data area is telemetering data sent by the unmanned aerial vehicle to the ground control station, and the contained information comprises the current position, the attitude, the measured value of airborne equipment, the running state and the like of the unmanned aerial vehicle.
In order to improve the transmission information amount of the telemetry data, the telemetry data is compactly arranged in a telemetry data frame in units of fields (the fields are relatively independent complete data segments and can be a measurement signal and a status flag), and one field can be composed of one or more bytes and can also be composed of one bit. For example, a telemetry data frame communication protocol is shown in table 1:
TABLE 1 telemetric data frame communication protocol table
As can be seen from table 1, the telemetry data defined in the drone system ICD is typically composed of multiple data frames (distinguished by frame identifiers) and multiple data fields within the frames. In the data frame, field 1 is a signed integer, field 2 is an unsigned integer, and fields 3 and 4 are bit-field data.
The method for analyzing the telemetering data of the large and medium-sized fixed wing unmanned aerial vehicle, disclosed by the invention, comprises the following steps as shown in figure 2:
step 1, carrying out ICD interface configuration on a telemetering data communication protocol of the unmanned aerial vehicle by adopting an XML format language to obtain ICD interface configuration information in an XML format, wherein the ICD interface configuration information comprises data block information, data field information and conversion method information, and the attributes and the interactive relation of the data block information, the data field information and the conversion method information are divided;
the specific operation is as follows:
defining each downlink telemetry communication frame in the telemetry data as data block information in ICD interface configuration information in an XML format, wherein the ICD interface configuration information in the XML format comprises at least one data block information (block), and each data block information (block) consists of at least one data field information (segment) as shown in FIGS. 2 and 3; the data field information (segment) includes conversion method information (conversion).
As shown in fig. 3, the attributes of the data block information (block) include:
title: a title;
name: a data block name;
id: identification (frame identification code).
As shown in fig. 4, the attributes of the data field information Segment include:
type: an identification field;
title: field display information;
name: a field id;
data-length: the length of the field;
byte-offset: a byte offset of a field in a data frame;
bit-offset: the amount of bit offset of the field in the data frame;
the specific location of the data field in the telemetry data frame can be identified by the last 3 attributes.
As shown in fig. 4, the data type of the attribute type identification field of the data field information (segment) is as follows:
FIXED _ BYTE: an integer constant field;
FIXED _ BIT: a bit field type constant field;
SBYTE _ ARRAY: a signed integer field;
UBYTE _ ARRAY: an unsigned integer field;
SBIT _ ARRAY: a signed bitfield field;
UBIT _ ARRAY: an unsigned bitfield field;
BUFF: a string type field;
FLOAT: a single floating point number field;
b, DOUBLE: a double precision floating point number field.
As shown in fig. 4, the attribute of the conversion method information (conversion) includes a type attribute, and a child node numeric or child node preset; wherein: the type attribute is used to identify the type of conversion of the data field (segment), including numeric conversion and constant type conversion; when the conversion type is numerical conversion, the conversion method information (conversion) defines the child node numeric; when the conversion type is a constant type conversion, the conversion method information (conversion) defines a child node preset. Wherein:
the child node number is used to describe the mathematical transformation formula information of the data field segment, and the number node includes the following attributes:
and Shift: the difference is transformed.
Number: transforming the coefficient numerator;
denominator: a transformation coefficient denominator;
wherein, the transformation coefficient refers to: the scale factor of the field encoded value to the field actual value. The field encoding value, i.e. the number of the field in the data frame, is usually packed and transmitted in integer form, and the actual value of the field (the field encoding value is scaled by a scale) is an integer or a floating point number.
The field actual value is the field encoded value, the numerator of the transform coefficient, the denominator of the transform coefficient, and the transform difference.
The child node preset is used to describe the constant preset Value of the data field (segment). The constant type field is used for expressing information such as a frame sequence number, a frame multiplexing mark and the like, and when the information is analyzed, whether the data frame is matched with the communication protocol or not is distinguished by judging whether the field is the same as a constant preset value or not.
The unmanned aerial vehicle telemetry data frame protocol is abstractly configured and managed through the XML format, the unmanned aerial vehicle telemetry data frame protocol managed through the XML format can greatly reduce the workload of ground station implementation and maintenance brought by ICD change, and the unmanned aerial vehicle telemetry data frame protocol can be expanded and adapted to unmanned aerial vehicle systems of other types through methods of increasing field types, conversion formulas and the like, and is high in universality.
And 2, according to the ICD interface configuration information in the XML format obtained in the step 1, and the attributes and the interactive relationship of the data block information, the data field information and the conversion method information, a dynamic link library (ICDLib) is realized by an object-oriented programming method, and the dynamic link library (ICDLib) comprises a reading unit, an analysis unit and a searching unit, as shown in FIG. 5.
Step 3, calling a reading unit of the dynamic link library in the step 2, respectively reading data block information, data field information and conversion method information in the ICD interface configuration information, creating a data block container, a data field container and a conversion method container, sequentially adding the conversion method container to the data field container, and adding the data field container to the data block container;
as shown in fig. 6, the data block container, the data field container and the transformation method container configuration specifically include the following sub-steps:
step 31, the ground station calls a reading unit in the dynamic link library to read a list of data block information in the ICD interface configuration information obtained in the step 1;
step 32, selecting data block information in the data block information list, creating a data block container, calling a readBlockConfig function of the data block container, reading the data block information, initializing the attribute of the data block container, and adding the data block information into a data block container list of a dynamic link library;
as shown in fig. 5, the data block container includes a readblockackconfig function and a parseBlockBuff function, where the readblockackconfig function is used to read data block information, and the parseBlockBuff function is used to analyze data block information in the telemetry data;
step 33, selecting data field information in the data block information, creating a data field container, calling a readSegmentConfig function of the data field container, reading the data field information, and initializing the attribute of the data field container;
as shown in fig. 5, the data field container includes a readSegmentConfig function, a parsegmentbuff function and a getValue function, the readSegmentConfig function is used for reading data field information, the parsegmentbuff function is used for analyzing data field information in the telemetry data, and the getValue function is used for acquiring an actual value of a data field of telemetry frame data;
step 34, creating a conversion method container according to the type of the conversion method carried by the data field information in the step 33, calling a readconvertionconfig function in the conversion method container, reading the conversion method information, and initializing the attribute of the conversion method container;
as shown in fig. 5, the conversion method container includes a readcoverionconfig function for reading the conversion method information, a decodervalue function for converting the field encoding value into the field actual value, and an encodervalue function for converting the field actual value into the field encoding value.
Step 35, adding the conversion method container to the data field container, and then adding the configured data field container to the field list of the data block container;
step 36, if the data block information contains unread data field information, returning to step 33 to read the next data field information, otherwise, ending step 3;
step 37, if the data block information list has unread data block information, returning to the step 32 to read the next data block information, otherwise, ending the step 3.
And 4, calling an analysis unit of the dynamic link library in the step 2 to analyze the telemetering data buffer area to obtain a frame identification code and telemetering data, then calling the data block container, the data field container and the conversion method container obtained in the step 3, analyzing and storing the telemetering data of the telemetering frame data buffer area received by the ground station to obtain an actual value of a telemetering frame data field.
As shown in fig. 7, the parsing step includes the following sub-steps:
step 41, the ground station calls an analysis unit of the dynamic link library in the step 2 to analyze a telemetering frame data buffer area to obtain a frame identification code and telemetering data;
step 42, searching a corresponding data block container in a dynamic link library (ICDlib) according to the frame identification code;
step 43, if the matched data block container is not found, returning to failure, and ending the analysis process;
step 44, if the matched data block container is found, calling a parseBlockBuff function of the data block container, and analyzing the telemetering data obtained in the step 41 to obtain data field information; calling a search unit of the dynamic link library to search a data field container in the data block container;
step 45, calling the parsesegmentmbuff function of the data field container in the step 44, and analyzing the configured data field information in the data field container to obtain the attribute of the data field information, namely obtaining the field coding value;
step 46, calling a decodeValue function of the conversion method container in the data field container in the step 45, converting the field coding value obtained in the step 45 into a field actual value, and storing the field actual value in the data field container in the step 45;
and 47, repeating the step 45 and the step 46, and analyzing the field list of the data block container in the step 44 to obtain the actual value of the data field of the telemetry frame.
And 5: and (3) the ground station searches the appointed data block and data field through the search function of the dynamic link library in the step (1), acquires the appointed data field container, obtains the actual value of the telemetry frame data field, and displays the actual value on the display module.
The invention also provides a system for realizing the telemetering data analysis of the large and medium-sized fixed wing unmanned aerial vehicle, which comprises a dynamic link library, wherein the dynamic link library comprises a reading unit, an analysis unit and a searching unit;
the reading unit comprises a reading function readStreamConfig used for reading a list of data block information in the ICD interface configuration information in the XML format;
the analysis unit comprises an analysis entry function parseRecvBuff used for analyzing a telemetry data buffer area received by the ground station;
the lookup unit includes a lookup function findDataSegment for looking up a specified data field container.
Claims (7)
1. A telemetry data analysis method for large and medium-sized fixed wing unmanned aerial vehicles is characterized by comprising the following steps:
step 1, carrying out ICD interface configuration on a telemetering data communication protocol of the unmanned aerial vehicle by adopting an XML format language to obtain ICD interface configuration information in an XML format, wherein the ICD interface configuration information comprises data block information, data field information and conversion method information, and the attributes and the interactive relationship of the data block information, the data field information and the conversion method information are divided;
step 2, according to the ICD interface configuration information in the XML format obtained in the step 1, and the attributes and the interactive relationship of the data block information, the data field information and the conversion method information, a dynamic link library is realized by an object-oriented programming method, and comprises a reading unit, an analysis unit and a searching unit;
step 3, calling a reading unit of the dynamic link library in the step 2, respectively reading data block information, data field information and conversion method information in the ICD interface configuration information, creating a data block container, a data field container and a conversion method container, sequentially adding the conversion method container to the data field container, and adding the data field container to the data block container;
and 4, calling an analysis unit of the dynamic link library in the step 2 to analyze the telemetering data buffer area to obtain a frame identification code and telemetering data, then calling the data block container, the data field container and the conversion method container obtained in the step 3, analyzing and storing the telemetering data of the telemetering frame data buffer area received by the ground station to obtain an actual value of a telemetering frame data field.
2. The telemetry data analysis method of large and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, wherein a readBlockConfig function and a parseBlockBuff function are included in the data block container, the readBlockConfig function is used for reading data block information, and the parseBlockBuff function is used for analyzing data block information in the telemetry data;
the data field container comprises a readSegmentConfig function, a parsSegmentBuff function and a getValue function, wherein the readSegmentConfig function is used for reading data field information, the parsSegmentBuff function is used for analyzing data field information in the telemetering data, and the getValue function is used for acquiring an actual value of a data field of the telemetering data;
the conversion method container comprises a readConversionConfig function, a decodeValue function and an encodeValue function, wherein the readConveronConfig function is used for reading conversion method information, the decodeValue function is used for converting a field coding value into a field actual value, and the encodeValue function is used for converting the field actual value into the field coding value.
3. The telemetry data analysis method for medium and large fixed wing drones as claimed in claim 2, wherein the step 3 comprises the following operations:
step 31, the ground station calls a reading unit in the dynamic link library to read a list of data block information in the ICD interface configuration information obtained in the step 1;
step 32, selecting data block information in the data block information list, creating a data block container, calling a readBlockConfig function of the data block container, reading the data block information, initializing the attribute of the data block container, and adding the data block information into a data block container list of a dynamic link library;
step 33, selecting data field information in the data block information, creating a data field container, calling a readSegmentConfig function of the data field container, reading the data field information, and initializing the attribute of the data field container;
step 34, creating a conversion method container according to the type of the conversion method carried by the data field information in the step 33, calling a readconvertionconfig function in the conversion method container, reading the conversion method information, and initializing the attribute of the conversion method container;
step 35, adding the conversion method container to the data field container, and then adding the configured data field container to the field list of the data block container;
step 36, if the data block information contains unread data field information, returning to step 33 to read the next data field information, otherwise, ending step 3;
step 37, if the data block information list has unread data block information, returning to the step 32 to read the next data block information, otherwise, ending the step 3.
4. The method for telemetry data resolution of medium and large fixed wing drones as claimed in claim 2, wherein the step 4 comprises the operations of:
step 41, the ground station calls an analysis unit of the dynamic link library in the step 2 to analyze a telemetering frame data buffer area to obtain a frame identification code and telemetering data;
step 42, searching a corresponding data block container in a dynamic link library according to the frame identification code;
step 43, if the matched data block container is not found, returning to failure, and ending the analysis process;
step 44, if the matched data block container is found, calling a parseBlockBuff function of the data block container, and analyzing the telemetering data obtained in the step 41 to obtain data field information; calling a search unit of the dynamic link library to search a data field container in the data block container;
step 45, calling the parsesegmentmbuff function of the data field container in the step 44, and analyzing the configured data field information in the data field container to obtain the attribute of the data field information, namely obtaining the field coding value;
step 46, calling a decodeValue function of the conversion method container in the data field container in the step 45, converting the field coding value obtained in the step 45 into a field actual value, and storing the field actual value in the data field container in the step 45;
and 47, repeating the step 45 and the step 46, and analyzing the field list of the data block container in the step 44 to obtain the actual value of the data field of the telemetry frame.
5. The method of claim 1, wherein the method further comprises:
and 5, searching the appointed data block and data field by the ground station through the search function of the dynamic link library in the step 1, acquiring an appointed data field container, obtaining an actual value of the data field of the telemetering frame, and displaying the actual value on a display module.
6. The method of claim 1, wherein the ICD interface configuration information comprises at least one data block, wherein the data block comprises at least one data field, and wherein the data field comprises a transformation method.
7. A system for realizing the telemetry data analysis method of the medium and large fixed-wing unmanned aerial vehicles according to any one of claims 5-6, wherein the analysis system comprises a dynamic link library, and the dynamic link library comprises a reading unit, an analysis unit and a searching unit;
the reading unit comprises a reading function readStreamConfig used for reading a list of data block information in the ICD interface configuration information in the XML format;
the analysis unit comprises an analysis entry function parseRecvBuff used for analyzing a telemetry data buffer area received by the ground station;
the lookup unit includes a lookup function findDataSegment for looking up a specified data field container.
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