CN108959114A - A kind of sonar contact data recording equipment and recording method - Google Patents
A kind of sonar contact data recording equipment and recording method Download PDFInfo
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- CN108959114A CN108959114A CN201810491989.9A CN201810491989A CN108959114A CN 108959114 A CN108959114 A CN 108959114A CN 201810491989 A CN201810491989 A CN 201810491989A CN 108959114 A CN108959114 A CN 108959114A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
- G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0866—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches for peripheral storage systems, e.g. disk cache
- G06F12/0871—Allocation or management of cache space
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- Acoustics & Sound (AREA)
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Abstract
A kind of sonar contact data recording equipment and recording method, including STM32 chip；USART module, SPI module, the memory module with SD card and the USB OTG FS module being connect with STM32 chip；The PC machine being connect with USB OTG FS module；Carry file system on STM32 chip, and distribute the first buffer area, the second buffer area, third buffer area and temporal information buffer area.It is incoming whether STM32 chip real-time monitoring has sonar data, and judges the source of data；Write information into different buffer areas；Creation has date file folder, and the creation time file under date file folder in SD card；The data that USART module and SPI module are transmitted in the 1s time form a data packet；Being written in every time file to SD card will be in next time file in the data deposit SD card of next data packet after data packet has reached 1 minute duration；USB OTG FS module reads the data stored in SD card after detecting and powering on and connect with PC machine, and is sent to PC machine by USB data line.
Description
Technical field
The present invention relates to Data recording technique fields, more particularly, to a kind of sonar contact data recording equipment, the present invention
Further relate to a kind of recording method of sonar contact data.
Background technique
Sonar contact detects submarine target using underwater acoustic wave, is widely used in torpedo guidance, sea mine fuze, and
The locating fish, offshore oil drilling, marine navigation, underwater operation, hydrographic survey and exploration of submarine geology and geomorphology etc..For multiple
For miscellaneous marine environment, noise and barrier will be encountered in detection process, so that the data of required sonar contact are increasingly huge
Greatly, it needs to record a large amount of and complicated data.
CN106707826A disclosed a kind of steering data record circuit, including microprocessor on May 24th, 2017,
And the peripheral circuit of microprocessor；Peripheral circuit includes crystal oscillating circuit, power circuit, RS485 serial port circuit, SD card circuit；Institute
Microprocessor is stated using STM32F103RCT6.
Data record and storage use RAM and FLASH in single-chip microcontroller mostly at present, or by SD card and USB flash disk equipment.But
The data general user being stored in RAM and FLASH intuitively can not analyze and export, and smaller for the data volume of storage, this
It results in that a large amount of and complicated sonar contact data can not be recorded；If the data being stored in the equipment such as SD card and USB flash disk are directly write
Enter, then easily occurs rambling data when needing additionally to write host computer procedure and export stored data, and exporting, is difficult to
Analysis, this will bring difficulty for the data process&analysis in later period.
Summary of the invention
For overcome the deficiencies in the prior art, it can be stored largely technical problem to be solved by the invention is to provide a kind of
Data and data can intuitively be exported to PC machine no longer need to the sonar contact data recording equipment read by host computer and note
Recording method.
In order to solve the above-mentioned technical problem, according to an aspect of the present invention, the present invention provides a kind of sonar contact data
Recording device, including STM32 chip；The USART module that is connect with the STM32 chip communication, SPI module, with SD card
Memory module and USB OTG FS module；The PC machine being connect by USB data line with USB OTG FS module；The STM32 core
On piece carry file system, and distribute the first buffer area, the second buffer area, third buffer area and temporal information buffer area；
Acceleration, posture information and the target detected when the data of the SPI module transfer include sonar floating or dive
Data information；The data of the USART module transfer include the azimuth information and current temporal information of sonar present position；Institute
It states whether STM32 chip real-time monitoring has data to be passed to, and judges the source of data；
When STM32 chip detects that USART module when transmitting data, judges transmitted data content；When the number transmitted
According to content be temporal information when, by temporal information write time information cache area；When STM32 chip judges SD card with the presence or absence of this
Between the date date file folder；The date file folder on the date if it exists, then in STM32 chip read access time information cache area
When, minute, second temporal information, the date date file folder under creation one according to this when, minute, second temporal information name when
Between file；If it does not exist the Time of Day date file folder, then the year in STM32 chip read access time information cache area, the moon,
Day date information creates the new date file named according to the year, month, day date information in SD card, and when reading
Between in information cache area when, minute, second temporal information, when creating one under the new date file according to this, when minute, second
Between information name time file；When the data content transmitted is the azimuth information data of sonar present position, STM32 core
The data are written piece since the first address of third buffer area, judge whether third buffer area is write after completion of writing the data
It is full, if buffer area does not write the end address that the address pointer direction written data of data is completely written；If buffer area has been write
Full, then the address pointer that data are written is directed toward the first address of third buffer area, the other data covers that will be had been written into；
When STM32 chip detects SPI module when transmitting data, which is write since the first address of the first buffer area
Enter, the first buffer area is written in the data in the preceding 0.5s time that SPI module transfer is come；After the first buffer area is write completely, open
The address pointer of SD card is directed toward the first address for the time file that the SD card is created by the time file that SD card is created, will
The data in the preceding 0.5s time that SPI module transfer comes are stored in this time file；In the rear 0.5s time that SPI module transfer is come
Data be written since the first address of the second buffer area；When SPI module transfer come after the 0.5s time in data all connect
After receiving write-in, the address pointer of the second buffer area is directed toward to the knot of data in the rear 0.5s time that SPI module transfer be written comes
The second buffer area is written in azimuth information data in third buffer area by beam address；Open the time file that SD card is created, SD
The address pointer of card is directed toward the tail address of the time file written data, in the rear 0.5s time that SPI module transfer is come
Data and azimuth information data are stored in the time file；
The data that USART module and SPI module are transmitted in the 1s time form a data packet, and data packet includes that write-in first is slow
Deposit the rear 0.5s that the second buffer area SPI module transfer of data and write-in in the preceding 0.5s time of the SPI module transfer in area comes
Data and azimuth information data in time；The writing mode for the data that USART module and SPI module are transmitted in every 1s time
Carried out according to this by abovementioned steps, guarantee data transimission and storage when without mistakes and omissions and frame losing；
After a data packet is written in every time file to SD card, STM32 chip judges the sum being written in the time file
According to whether 1 minute duration is reached, if not up to 1 minute duration, continue in the data deposit SD card by next data packet
In the time file；If having reached 1 minute duration, the write time after the time of temporal information buffer area is increased by 1 minute
In information cache area, and the temporal information before covering；STM32 chip judges SD card with the presence or absence of modified Time of Day
Date file folder；The date file folder on the date if it exists, then it is modified in STM32 chip read access time information cache area
When, minute, second temporal information, the date date file folder under creation one according to modification after when, minute, second temporal information name
Next time file；The date file of the Time of Day presss from both sides if it does not exist, then STM32 chip read access time information cache area
In modified year, month, day date information, in SD card create one according to modified year, month, day date information name
Next date file folder, and it is modified in read access time information cache area when, minute, second temporal information, in the new date
Under file create one according to after modification when, minute, second temporal information name next time file；Then by next number
According in next time file in the data deposit SD card of packet；
USB OTG FS module reads the data stored in SD card after detecting and powering on and connect with PC machine, and passes through USB
Data line is sent to PC machine.
According to another aspect of the present invention, the present invention provides a kind of sonar contact data record method, is applied to sonar
In detection data recording device, the sonar contact data recording equipment includes STM32 chip；With the STM32 chip communication
USART serial ports transmission module, SPI transmission module, the memory module with SD card and the USB OTG FS module of connection；Pass through
The PC machine that USB data line is connect with USB OTG FS module；Carry file system on the STM32 chip, and distribute first
Buffer area, the second buffer area, third buffer area and temporal information buffer area；Data recording process the following steps are included:
Acceleration, posture information and the target detected when the data of the SPI module transfer include sonar floating or dive
Data information；The data of the USART module transfer include the azimuth information and current temporal information of sonar present position；Institute
It states whether STM32 chip real-time monitoring has data to be passed to, and judges the source of data；
When STM32 chip detects that USART module when transmitting data, judges transmitted data content；When the number transmitted
According to content be temporal information when, by temporal information write time information cache area；When STM32 chip judges SD card with the presence or absence of this
Between the date date file folder；The date file folder on the date if it exists, then in STM32 chip read access time information cache area
When, minute, second temporal information, the date date file folder under creation one according to this when, minute, second temporal information name when
Between file；If it does not exist the Time of Day date file folder, then the year in STM32 chip read access time information cache area, the moon,
Day date information creates the new date file named according to the year, month, day date information in SD card, and when reading
Between in information cache area when, minute, second temporal information, when creating one under the new date file according to this, when minute, second
Between information name time file；When the data content transmitted is the azimuth information data of sonar present position, STM32 core
The data are written piece since the first address of third buffer area, judge whether third buffer area is write after completion of writing the data
It is full, if buffer area does not write the end address that the address pointer direction written data of data is completely written；If buffer area has been write
Full, then the address pointer that data are written is directed toward the first address of third buffer area, the other data covers that will be had been written into；
When STM32 chip detects SPI module when transmitting data, which is write since the first address of the first buffer area
Enter, the first buffer area is written in the data in the preceding 0.5s time that SPI module transfer is come；After the first buffer area is write completely, open
The address pointer of SD card is directed toward the first address for the time file that the SD card is created by the time file that SD card is created, will
The data in the preceding 0.5s time that SPI module transfer comes are stored in this time file；In the rear 0.5s time that SPI module transfer is come
Data be written since the first address of the second buffer area；When SPI module transfer come after the 0.5s time in data all connect
After receiving write-in, the address pointer of the second buffer area is directed toward to the knot of data in the rear 0.5s time that SPI module transfer be written comes
The second buffer area is written in azimuth information data in third buffer area by beam address；Open the time file that SD card is created, SD
The address pointer of card is directed toward the tail address of the time file written data, in the rear 0.5s time that SPI module transfer is come
Data and azimuth information data are stored in the time file；
The data that USART module and SPI module are transmitted in the 1s time form a data packet, and data packet includes that write-in first is slow
Deposit the rear 0.5s that the second buffer area SPI module transfer of data and write-in in the preceding 0.5s time of the SPI module transfer in area comes
Data and azimuth information data in time；The writing mode for the data that USART module and SPI module are transmitted in every 1s time
Carried out according to this by abovementioned steps, guarantee data transimission and storage when without mistakes and omissions and frame losing；
After a data packet is written in every time file to SD card, STM32 chip judges the sum being written in the time file
According to whether 1 minute duration is reached, if not up to 1 minute duration, continue in the data deposit SD card by next data packet
In the time file；If having reached 1 minute duration, the write time after the time of temporal information buffer area is increased by 1 minute
In information cache area, and the temporal information before covering；STM32 chip judges SD card with the presence or absence of modified Time of Day
Date file folder；The date file folder on the date if it exists, then it is modified in STM32 chip read access time information cache area
When, minute, second temporal information, the date date file folder under creation one according to modification after when, minute, second temporal information name
Next time file；The date file of the Time of Day presss from both sides if it does not exist, then STM32 chip read access time information cache area
In modified year, month, day date information, in SD card create one according to modified year, month, day date information name
Next date file folder, and it is modified in read access time information cache area when, minute, second temporal information, in the new date
Under file create one according to after modification when, minute, second temporal information name next time file；Then by next number
According in next time file in the data deposit SD card of packet；
USB OTG FS module reads the data stored in SD card after detecting and powering on and connect with PC machine, and passes through USB
Data line is sent to PC machine.
Technical solution provided by the invention is that filename stores mass data, guarantee data using the time, it can be achieved that orderly
Without mistakes and omissions, and intuitively data can be exported to PC machine by USB interface and data line, to carry out data analysis and processing.
Internal data mode based on STM32, can record a large amount of data and data can be exported intuitively by PC machine, be not necessarily to
It is read again by host computer.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and is constituted part of this application, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the principle schematic diagram of embodiment sonar contact data recording equipment.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Sonar contact data recording equipment as shown in Figure 1, including STM32 chip 1；With 1 communication link of STM32 chip
USART module 2, SPI module 3, the memory module 4 with SD card and the USB OTG FS module 5 connect；By USB data line with
The PC machine 6 that USB OTG FS module 5 connects；Carry file system on the STM32 chip 1, and distribute the first buffer area,
Two buffer areas, third buffer area and temporal information buffer area.
The data recording process of sonar contact data recording equipment the following steps are included:
Acceleration, posture information and the target data detected when the data that SPI module 3 is transmitted include sonar floating or dive
Information；The data that USART module 2 is transmitted include the azimuth information and current temporal information of sonar present position；STM32 core
It is incoming whether 1 real-time monitoring of piece has data, and judges the source of data.Sonar is typically provided accelerometer, gyroscope, magnetometer
It is used to acquire the acceleration and attitude data of sonar Deng, accelerometer, gyroscope, magnetometer, then resolves its roll angle, bows
The elevation angle, azimuth information data.P sound pressure channel information, the X-axis channel particle information, Y-axis channel acquired during sonar detection
Particle information, the number of targets such as target frequency and orientation, acoustic pressure and Particle Vibration Velocity can be calculated by FFT transform it is believed that
Breath.
When STM32 chip 1 detects that USART module 2 when transmitting data, judges transmitted data content；When being passed
When defeated data content is temporal information, by temporal information write time information cache area；Whether STM32 chip 1 judges SD card
There are the date file of Time of Day folders；The date file on the date presss from both sides if it exists, then 1 read access time information of STM32 chip
In buffer area when, minute, second temporal information, the date date file folder under creation one according to this when, the minute, second time letter
Cease the time file of name；The date file of the Time of Day presss from both sides if it does not exist, then 1 read access time information cache of STM32 chip
Year, month, day date information in area creates the new date file named according to the year, month, day date information in SD card
Folder, and in read access time information cache area when, minute, second temporal information, under the new date file create a basis
This when, minute, second temporal information name time file；When the azimuth information number that the data content transmitted is sonar present position
According to when, the data are written STM32 chip 1 since the first address of third buffer area, judge third after completion of writing the data
It is full whether buffer area is write, if buffer area does not write the end address that the address pointer direction written data of data is completely written；If
Buffer area has write the first address that the address pointer direction third buffer area of data is completely then written, and the other data having been written into are covered
Lid.
When STM32 chip 1 detects SPI module 3 when transmitting data, which is opened from the first address of the first buffer area
Begin to be written, data the first buffer area of write-in in the preceding 0.5s time that the transmission of SPI module 3 is come；After the first buffer area is write completely,
The time file that SD card is created is opened, the address pointer of SD card is directed toward to the first address for the time file that SD card is created, it will
The data in the preceding 0.5s time that the transmission of SPI module 3 comes are stored in this time file；The rear 0.5s time that the transmission of SPI module 3 is come
Interior data are written since the first address of the second buffer area；The data after transmission of SPI module 3 comes in the 0.5s time are whole
After receiving write-in, the address pointer of the second buffer area is directed toward data in the rear 0.5s time that the transmission of SPI module 3 be written comes
The second buffer area is written in azimuth information data in third buffer area by end address；The time file that SD card is created is opened,
The address pointer of SD card is directed toward the tail address of the time file written data, in the rear 0.5s time that the transmission of SPI module 3 is come
Data and azimuth information data be stored in the time file.
The data that USART module 2 and SPI module 3 are transmitted in the 1s time form a data packet, and data packet includes write-in
Data and write-in the second buffer area SPI module 3 transmission in the transmission of SPI module 3 of the first buffer area next preceding 0.5s time are come
The rear 0.5s time in data and azimuth information data；The data that USART module 2 and SPI module 3 are transmitted in every 1s time
Writing mode carried out according to this by abovementioned steps, guarantee data transimission and storage when without mistakes and omissions and frame losing.
After a data packet is written in every time file to SD card, what STM32 chip 1 judged to be written in the time file
Whether total data reaches 1 minute duration, if not up to 1 minute duration, continues the data of next data packet being stored in SD card
In the time file in；If having reached 1 minute duration, be written after the time of temporal information buffer area is increased by 1 minute
In temporal information buffer area, and the temporal information before covering；STM32 chip 1 judges SD card with the presence or absence of the modified time
The date file on date presss from both sides；The date file folder on the date if it exists, then repair in 1 read access time information cache area of STM32 chip
After changing when, minute, second temporal information, the date date file folder under creation one according to modification after when, the minute, second time letter
Cease next time file of name；The date file folder of the Time of Day if it does not exist, then 1 read access time of STM32 chip is believed
Modified year, month, day date information in buffer area is ceased, one is created in SD card and is believed according to the modified year, month, day date
Breath name next date file folder, and it is modified in read access time information cache area when, minute, second temporal information, at this
Under new date file create one according to after modification when, minute, second temporal information name next time file；Then will under
In next time file in the data deposit SD card of one data packet.
USB OTG FS module 5 reads the data stored in SD card after detecting and powering on and connect with PC machine 6, and leads to
It crosses USB data line and is sent to PC machine 6.
Technical solution provided by the invention can realize it is orderly, using the time as filename store mass data, guarantee data
Without mistakes and omissions, and intuitively data can be exported to PC machine by USB interface and data line, to carry out data analysis and processing.
For those skilled in the art, the invention may be variously modified and varied.It is all to be wanted in right of the present invention
Within the spirit and principle asked, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (2)
1. a kind of sonar contact data recording equipment, including STM32 chip (1)；With the STM32 chip (1) communication connection
USART module (2), SPI module (3), memory module (4) and USB OTG FS module (5) with SD card；Pass through usb data
The PC machine (6) that line is connect with USB OTG FS module (5)；It is characterized in that, carry file system on the STM32 chip (1),
And distribute the first buffer area, the second buffer area, third buffer area and temporal information buffer area；
Acceleration, posture information and the mesh detected when the data of SPI module (3) transmission include sonar floating or dive
Mark data information；The data of USART module (2) transmission include believing the azimuth information of sonar present position and current time
Breath；It is incoming whether STM32 chip (1) real-time monitoring has data, and judges the source of data；
When STM32 chip (1) detects that USART module (2) when transmitting data, judges transmitted data content；When being passed
When defeated data content is temporal information, by temporal information write time information cache area；STM32 chip (1) judges that SD card is
It is no that there are the date file of Time of Day folders；The date file on the date presss from both sides if it exists, then STM32 chip (1) read access time
In information cache area when, minute, second temporal information, the date date file folder under creation one according to this when, when minute, second
Between information name time file；The date file folder of the Time of Day if it does not exist, then STM32 chip (1) read access time is believed
The year, month, day date information in buffer area is ceased, a new day named according to the year, month, day date information is created in SD card
Phase file, and in read access time information cache area when, minute, second temporal information, create one under the new date file
It is a according to this when, the name of minute, second temporal information time file；When the orientation that the data content transmitted is sonar present position
When information data, the data are written STM32 chip (1) since the first address of third buffer area, after completion of writing the data
Judge whether third buffer area is write completely, if buffer area does not write the knot that the address pointer direction written data of data is completely written
Beam address；If buffer area has write the first address that the address pointer direction third buffer area of data is completely written, by its having been written into
Its data cover；
When STM32 chip (1) detects SPI module (3) when transmitting data, which is opened from the first address of the first buffer area
Begin to be written, data the first buffer area of write-in in the preceding 0.5s time that SPI module (3) transmission is come；When the first buffer area is write completely
Afterwards, the time file that SD card is created is opened, the address pointer of SD card is directed toward to the head for the time file that the SD card is created
Address, the data deposit this time file in the preceding 0.5s time that SPI module (3) transmission is come；SPI module (3) transmission is come
The rear 0.5s time in data be written since the first address of the second buffer area；As the rear 0.5s that SPI module (3) transmission comes
After interior data all receive write-in, the address pointer direction SPI module (3) be written of the second buffer area is transmitted after coming
The second buffer area is written in azimuth information data in third buffer area by the end address of data in the 0.5s time；Open SD card
The time file created, the address pointer of SD card are directed toward the tail address of the time file written data, by SPI module (3)
Data and azimuth information data in the transmission next rear 0.5s time are stored in the time file；
The data that USART module (2) and SPI module (3) are transmitted in the 1s time form a data packet, and data packet includes write-in
The data and write-in the second buffer area SPI module (3) biography in the preceding 0.5s time that SPI module (3) transmission of first buffer area comes
Data and azimuth information data in the defeated next rear 0.5s time；USART module (2) and SPI module (3) are passed in every 1s time
The writing mode of defeated data is carried out according to this by abovementioned steps, guarantee data transimission and storage when without mistakes and omissions and frame losing；
After a data packet is written in every time file to SD card, STM32 chip (1) judges to be written in the time file total
Whether data reach 1 minute duration, if not up to 1 minute duration, continue in the data deposit SD card by next data packet
The time file in；If having reached 1 minute duration, when being written after the time of temporal information buffer area is increased by 1 minute
Between in information cache area, and the temporal information before covering；STM32 chip (1) judges SD card with the presence or absence of the modified time
The date file on date presss from both sides；The date file folder on the date if it exists, then in STM32 chip (1) read access time information cache area
When modified, minute, second temporal information, the date date file folder under creation one according to modification after when, the minute, second time
Next time file of information name；The date file folder of the Time of Day if it does not exist, then when STM32 chip (1) is read
Between modified year, month, day date information in information cache area, one is created in SD card according to modified year, month, day day
Phase information name next date file folder, and it is modified in read access time information cache area when, minute, second temporal information,
Under the new date file create one according to modification after when, minute, second temporal information name next time file；So
It afterwards will be in next time file in the data deposit SD card of next data packet；
USB OTG FS module (5) reads the data stored in SD card after detecting and powering on and connect with PC machine (6), and leads to
It crosses USB data line and is sent to PC machine (6).
2. a kind of sonar contact data record method, which is characterized in that be applied in sonar contact data recording equipment, the sound
Detection data recording device includes STM32 chip (1)；With the STM32 chip (1) communication connection USART module (2),
SPI module (3), memory module (4) and USB OTG FS module (5) with SD card；Pass through USB data line and USB OTG FS
The PC machine (6) of module (5) connection；Carry file system on the STM32 chip (1), and distribute the first buffer area, second slow
Deposit area, third buffer area and temporal information buffer area；Data recording process the following steps are included:
Acceleration, posture information and the mesh detected when the data of SPI module (3) transmission include sonar floating or dive
Mark data information；The data of USART module (2) transmission include believing the azimuth information of sonar present position and current time
Breath；It is incoming whether STM32 chip (1) real-time monitoring has data, and judges the source of data；
When STM32 chip (1) detects that USART module (2) when transmitting data, judges transmitted data content；When being passed
When defeated data content is temporal information, by temporal information write time information cache area；STM32 chip (1) judges that SD card is
It is no that there are the date file of Time of Day folders；The date file on the date presss from both sides if it exists, then STM32 chip (1) read access time
In information cache area when, minute, second temporal information, the date date file folder under creation one according to this when, when minute, second
Between information name time file；The date file folder of the Time of Day if it does not exist, then STM32 chip (1) read access time is believed
The year, month, day date information in buffer area is ceased, a new day named according to the year, month, day date information is created in SD card
Phase file, and in read access time information cache area when, minute, second temporal information, create one under the new date file
It is a according to this when, the name of minute, second temporal information time file；When the orientation that the data content transmitted is sonar present position
When information data, the data are written STM32 chip (1) since the first address of third buffer area, after completion of writing the data
Judge whether third buffer area is write completely, if buffer area does not write the knot that the address pointer direction written data of data is completely written
Beam address；If buffer area has write the first address that the address pointer direction third buffer area of data is completely written, by its having been written into
Its data cover；
When STM32 chip (1) detects SPI module (3) when transmitting data, which is opened from the first address of the first buffer area
Begin to be written, data the first buffer area of write-in in the preceding 0.5s time that SPI module (3) transmission is come；When the first buffer area is write completely
Afterwards, the time file that SD card is created is opened, the address pointer of SD card is directed toward to the head for the time file that the SD card is created
Address, the data deposit this time file in the preceding 0.5s time that SPI module (3) transmission is come；SPI module (3) transmission is come
The rear 0.5s time in data be written since the first address of the second buffer area；As the rear 0.5s that SPI module (3) transmission comes
After interior data all receive write-in, the address pointer direction SPI module (3) be written of the second buffer area is transmitted after coming
The second buffer area is written in azimuth information data in third buffer area by the end address of data in the 0.5s time；Open SD card
The time file created, the address pointer of SD card are directed toward the tail address of the time file written data, by SPI module (3)
Data and azimuth information data in the transmission next rear 0.5s time are stored in the time file；
The data that USART module (2) and SPI module (3) are transmitted in the 1s time form a data packet, and data packet includes write-in
The data and write-in the second buffer area SPI module (3) biography in the preceding 0.5s time that SPI module (3) transmission of first buffer area comes
Data and azimuth information data in the defeated next rear 0.5s time；USART module (2) and SPI module (3) are passed in every 1s time
The writing mode of defeated data is carried out according to this by abovementioned steps, guarantee data transimission and storage when without mistakes and omissions and frame losing；
After a data packet is written in every time file to SD card, STM32 chip (1) judges to be written in the time file total
Whether data reach 1 minute duration, if not up to 1 minute duration, continue in the data deposit SD card by next data packet
The time file in；If having reached 1 minute duration, when being written after the time of temporal information buffer area is increased by 1 minute
Between in information cache area, and the temporal information before covering；STM32 chip (1) judges SD card with the presence or absence of the modified time
The date file on date presss from both sides；The date file folder on the date if it exists, then in STM32 chip (1) read access time information cache area
When modified, minute, second temporal information, the date date file folder under creation one according to modification after when, the minute, second time
Next time file of information name；The date file folder of the Time of Day if it does not exist, then when STM32 chip (1) is read
Between modified year, month, day date information in information cache area, one is created in SD card according to modified year, month, day day
Phase information name next date file folder, and it is modified in read access time information cache area when, minute, second temporal information,
Under the new date file create one according to modification after when, minute, second temporal information name next time file；So
It afterwards will be in next time file in the data deposit SD card of next data packet；
USB OTG FS module (5) reads the data stored in SD card after detecting and powering on and connect with PC machine, and passes through
USB data line is sent to PC machine.
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