CN108959115B - Data recording system and recording method based on suspended detection sonar - Google Patents
Data recording system and recording method based on suspended detection sonar Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
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- 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
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- 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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- 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
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Abstract
A data recording system and a data recording method based on suspension type detection sonar comprise a cabin body (1); a sonar sensor (2) connected with one end of the cabin body (1); an electronic processing board (3) arranged in the cabin body (1); a wireless transceiver module (4) connected with the cabin body (1) and the electronic processing board (3); a transceiving radio station (5) for communication connection with the wireless transceiving module (4); a PC (6) connected with the transceiver radio station (5) through a data line; the electronic processing board (3) comprises a DSP processing chip, a USART serial port module, an SPI module, an SD card module and a storage module, and the electronic processing board (3) is used for resolving and recording data detected by the sonar sensor (2); the recorded data are sent to the transceiving radio station (5) through the wireless transceiving module (4), and the transceiving radio station (5) receives the data sent by the wireless transceiving module (4) in real time and exchanges the data with the PC (6).
Description
Technical Field
The invention relates to the technical field of data recording, in particular to a data recording system based on a suspended detection sonar, and further relates to a data recording method based on a suspended detection sonar.
Background
Sonar detection utilizes underwater sound waves to detect underwater targets, and is widely applied to torpedo guidance, torpedo fuzes, fish detection, marine oil exploration, ship navigation, underwater operation, hydrographic measurement, surveying of submarine geology and landforms and the like. At present, sonar detection is basically adopted for underwater detection, and for a complex marine environment, noise and obstacles are encountered in the detection process, so that data required for sonar detection is increasingly huge, and a large amount of complex data needs to be recorded.
CN106707826a, 2017, 05, month and 24, discloses a steering data recording circuit, which comprises a microprocessor and a peripheral circuit of the microprocessor; the peripheral circuit comprises a crystal oscillator circuit, a power supply circuit, an RS485 serial port circuit and an SD card circuit; the microprocessor employs STM32F103RCT6.
At present, most of data recording and storage uses a RAM and a FLASH in a single chip microcomputer or an SD card and a U disk device. However, the data stored in the RAM and the FLASH generally cannot be intuitively analyzed and exported by a user, and the amount of data to be stored is small, which results in that a large amount of complex data cannot be recorded; if data stored in devices such as an SD card and a usb disk are written directly, an upper computer program needs to be written additionally to export the stored data, and disordered data is likely to occur during export, which is difficult to analyze, and this makes data processing and analysis difficult in the later period. Data transmission also uses wired connection such as watertight connector, but the wiring is various, and signal interference is more, especially in floated detection sonar class underwater detection system, the wiring environment is limited, and transmission distance reaches 3-5km, leads to the system often can't record a large amount of and complicated detection raw data, and the frame is lost in the data, and the bit error rate increases to can't reach the purpose of detecting.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a data recording system and a data recording method based on a suspended detection sonar, which can store a large amount of data, can transmit the data to a PC through a wireless communication mode and can be intuitively led out by the PC.
In order to solve the technical problem, according to one aspect of the present invention, the present invention provides a data recording system based on a suspended detection sonar, comprising a cabin; a sonar sensor connected with one end of the cabin body; an electronic processing board mounted in the cabin body; the wireless transceiving module is connected with the cabin and the electronic processing board; the receiving and transmitting radio station is used for realizing communication connection with the wireless receiving and transmitting module; the PC is connected with the transceiving radio station through a data line; the electronic processing board comprises a DSP processing chip, and a USART module, an SPI module and an SD card module which are in communication connection with the DSP processing chip; the electronic processing board resolves and records the obtained data; the recorded data is sent to a transceiving radio station through a wireless transceiving module, and the transceiving radio station receives the data sent by the wireless transceiving module in real time and exchanges the data with a PC (personal computer).
As a further improvement of the present invention, in the data recording system based on a suspended detection sonar, the electronic processing board mounts the file system and allocates a first buffer area, a second buffer area, a third buffer area and a time information buffer area;
the data transmitted by the SPI module comprises target data information detected based on a suspension type detection sonar; the data transmitted by the USART module comprise position information and current time information based on the position of a suspended detection sonar; the DSP processing chip monitors whether data are transmitted in real time and judges the source of the data;
when the DSP processing chip detects that the USART module is transmitting data, the transmitted data content is judged; when the transmitted data content is time information, writing the time information into a time information cache region; the DSP processing chip judges whether the SD card module has a date folder of the time and the date; if the date folder of the date exists, the DSP processing chip reads time information of hour, minute and second in the time information cache region, and a time file named according to the time information of hour, minute and second is established under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the information of the year, the month and the day in the time information cache region, creates a new date folder named according to the information of the year, the month and the day on the SD card module, reads the time information of the hour, the minute and the second in the time information cache region, and creates a time file named according to the time information of the hour, the minute and the second under the new date folder; when the transmitted data content is azimuth information data based on the position of the suspended detection sonar, the DSP processing chip starts to write the data from the initial address of the third cache region, judges whether the third cache region is full after the data is written, and if the cache region is not full, an address pointer of the written data points to the end address of the written data; if the cache region is full, the address pointer of the written data points to the first address of the third cache region, and other written data are covered;
when the DSP processing chip detects that the SPI module transmits data, the data is written from the first address of the first cache region, and the data transmitted by the SPI module in the first 0.5s time is written into the first cache region; when the first cache area is full, opening the time file created by the SD card module, enabling the address pointer of the SD card module to point to the first address of the time file created by the SD card module, and storing data in the first 0.5s time transmitted by the SPI module into the time file; writing data in the last 0.5s time transmitted by the SPI module from the first address of the second cache region; when all data transmitted by the SPI module within the later 0.5s are received and written, an address pointer of the second cache region points to the end address of the data transmitted by the written SPI module within the later 0.5s, and azimuth information data in the third cache region are written into the second cache region; opening a time file created by the SD card module, enabling an address pointer of the SD card module to point to a tail address of data written in the time file, and storing data and azimuth information data within the last 0.5s time transmitted by the SPI module into the time file;
data transmitted by the USART module and the SPI module within 1s form a data packet, and the data packet comprises data written into the SPI module of the first cache region within the first 0.5s time and data written into the SPI module of the second cache region within the second 0.5s time and azimuth information data; the writing mode of the data transmitted by the USART module and the SPI module in each 1s is carried out according to the steps, and no error, leakage and frame loss are ensured during data transmission and storage;
after writing a data packet into the time file of the SD card module, the DSP processing chip judges whether the total data written in the time file reaches 1 minute duration, and if the total data does not reach 1 minute duration, the DSP processing chip continues to store the data of the next data packet into the time file in the SD card module; if the time length of 1 minute is reached, the time of the time information cache region is increased by 1 minute and then written into the time information cache region, and the previous time information is covered; the DSP processing chip judges whether the SD card module has a date folder of the modified time and date; if the date folder of the date exists, the DSP processing chip reads the modified time information of hour, minute and second in the time information cache region, and a next time file named according to the modified time information of hour, minute and second is created under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the modified year, month and day date information in the time information cache region, creates a next date folder named according to the modified year, month and day date information on the SD card module, reads the modified time, minute and second information in the time information cache region, and creates a next time file named according to the modified time, minute and second information under the new date folder; then storing the data of the next data packet into the next time file in the SD card module;
the data stored in the SD card module is sent to a transceiving radio station through a wireless transceiving module, and the transceiving radio station receives the data sent by the wireless transceiving module in real time and transmits the data to a PC (personal computer); the data can be copied or deleted in the PC.
According to another aspect of the invention, the invention provides a data recording method based on a suspended detection sonar, which is applied to a data recording system based on a suspended detection sonar, wherein the data recording system based on a suspended detection sonar comprises a cabin body; a sonar sensor connected with one end of the cabin; an electronic processing board mounted within the capsule; the wireless transceiving module is connected with the cabin body and the electronic processing board; the receiving and transmitting radio station is used for realizing communication connection with the wireless receiving and transmitting module; the PC is connected with the transceiving radio station through a data line; the electronic processing board comprises a DSP processing chip, and a USART module, an SPI module and an SD card module which are in communication connection with the DSP processing chip; the electronic processing board resolves and records the obtained data; the electronic processing board mounts a file system and allocates a first cache region, a second cache region, a third cache region and a time information cache region;
the data transmitted by the SPI module comprises target data information detected based on a suspension type detection sonar; the data transmitted by the USART module comprise position information and current time information based on the position of a suspended detection sonar; the DSP processing chip monitors whether data are transmitted in real time and judges the source of the data;
when the DSP processing chip detects that the USART module is transmitting data, the transmitted data content is judged; when the transmitted data content is time information, writing the time information into a time information cache region; the DSP processing chip judges whether the SD card module has a date folder of the time and the date; if the date folder of the date exists, the DSP processing chip reads time information of hour, minute and second in the time information cache region, and a time file named according to the time information of hour, minute and second is established under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the information of the year, the month and the day in the time information cache region, creates a new date folder named according to the information of the year, the month and the day on the SD card module, reads the time information of the hour, the minute and the second in the time information cache region, and creates a time file named according to the time information of the hour, the minute and the second under the new date folder; when the transmitted data content is azimuth information data based on the position of the suspended detection sonar, the DSP processing chip starts to write the data from the initial address of the third cache region, judges whether the third cache region is full after the data is written, and if the cache region is not full, an address pointer of the written data points to the end address of the written data; if the cache region is full, the address pointer of the written data points to the first address of the third cache region, and other written data are covered;
when the DSP processing chip detects that the SPI module transmits data, the data is written from the first address of the first cache region, and the data transmitted by the SPI module in the first 0.5s time is written into the first cache region; when the first cache area is full, opening the time file created by the SD card module, enabling the address pointer of the SD card module to point to the first address of the time file created by the SD card module, and storing data in the first 0.5s time transmitted by the SPI module into the time file; writing data in the last 0.5s time transmitted by the SPI module from the first address of the second cache region; when all data within the later 0.5s time transmitted by the SPI module are received and written, an address pointer of the second cache region points to the end address of the data within the later 0.5s time transmitted by the written SPI module, and azimuth information data in the third cache region is written into the second cache region; opening a time file created by the SD card module, enabling an address pointer of the SD card module to point to a tail address of data written in the time file, and storing data and azimuth information data within the last 0.5s time transmitted by the SPI module into the time file;
data transmitted by the USART module and the SPI module within 1s form a data packet, and the data packet comprises data written into the SPI module of the first cache region within the first 0.5s time and data written into the SPI module of the second cache region within the second 0.5s time and azimuth information data; the writing mode of the data transmitted by the USART module and the SPI module in each 1s is carried out according to the steps, and no error, leakage and frame loss are ensured during data transmission and storage;
after writing a data packet into the time file of the SD card module, the DSP processing chip judges whether the total data written in the time file reaches 1 minute duration, and if the total data does not reach 1 minute duration, the data of the next data packet is continuously stored into the time file in the SD card module; if the time length of 1 minute is reached, the time of the time information cache region is increased by 1 minute and then written into the time information cache region, and the previous time information is covered; the DSP processing chip judges whether the SD card module has a date folder of the modified time and date; if the date folder of the date exists, the DSP processing chip reads the modified time information of hour, minute and second in the time information cache region, and a next time file named according to the modified time information of hour, minute and second is created under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the modified year, month and day date information in the time information cache region, creates a next date folder named according to the modified year, month and day date information on the SD card module, reads the modified time, minute and second information in the time information cache region, and creates a next time file named according to the modified time, minute and second information under the new date folder; then storing the data of the next data packet into the next time file in the SD card module;
the data stored in the SD card module is sent to a transceiving radio station through a wireless transceiving module, and the transceiving radio station receives the data sent by the wireless transceiving module in real time and transmits the data to a PC (personal computer); the data can be copied or deleted in the PC.
The technical scheme provided by the invention can realize orderly storage of a large amount of data by taking time as a file name, ensures no error and leakage of the data, and can intuitively transmit the data to the PC through a wireless communication mode so as to analyze and process the data. The transmission distance is long, and the defect that the transmission distance can only reach 3-5km in the existing wiring communication technology is overcome.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of the structural principle of the embodiment based on a suspended detection sonar.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the sonar data recording system based on suspension detection comprises a cabin body 1, a sonar sensor 2 connected with one end of the cabin body 1, an electronic processing board 3 installed in the cabin body 1, a wireless transceiver module 4 connected with the cabin body 1 and the electronic processing board 3, a transceiver radio station 5 for realizing communication connection with the wireless transceiver module 4, a PC 6 connected with the transceiver radio station 5 through a data line, wherein the electronic processing board 3 comprises a DSP processing chip, and a USART module, an SPI module and an SD card module which are in communication connection with the DSP processing chip; target data information such as target frequency and azimuth, sound pressure and particle vibration speed and the like can be solved through FFT (fast Fourier transform) on P sound pressure channel information, X-axis channel particle information and Y-axis channel particle information which are collected in the detection process of the sonar sensor 2, azimuth information and current time information of the position of the suspended detection sonar are transmitted to the electronic processing board 3, and the electronic processing board 3 is used for solving and recording the obtained data; the electronic processing board 3 mounts the file system and allocates a first cache region, a second cache region, a third cache region and a time information cache region.
The data recording process of the data recording system based on the suspended detection sonar comprises the following steps:
the data transmitted by the SPI module comprises target data information detected based on a suspension type detection sonar; data transmitted by the USART module comprise position information and current time information based on the position of the suspended detection sonar; the DSP processing chip monitors whether data are transmitted in real time and judges the source of the data.
When the DSP processing chip detects that the USART module is transmitting data, the transmitted data content is judged; when the transmitted data content is time information, writing the time information into a time information cache region; the DSP processing chip judges whether the SD card module has a date folder of the time and the date; if the date folder of the date exists, the DSP processing chip reads time information of hour, minute and second in the time information cache region, and a time file named according to the time information of hour, minute and second is established under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the year, month and day date information in the time information cache region, creates a new date folder named according to the year, month and day date information on the SD card module, reads the time information of the hour, minute and second in the time information cache region, and creates a time file named according to the time information of the hour, minute and second under the new date folder; when the transmitted data content is azimuth information data based on the position of the suspended detection sonar, the DSP processing chip starts to write the data from the first address of the third cache region, judges whether the third cache region is full after the data is written, and if the cache region is not full, the address pointer for writing the data points to the end address of the written data; if the cache region is full, the address pointer of the written data points to the first address of the third cache region, and other written data are covered.
When the DSP processing chip detects that the SPI module transmits data, the data is written from the first address of the first cache region, and the data transmitted by the SPI module in the first 0.5s time is written into the first cache region; when the first cache area is full, opening the time file created by the SD card module, enabling an address pointer of the SD card module to point to the first address of the time file created by the SD card module, and storing data within the first 0.5s time transmitted by the SPI module into the time file; writing data in the last 0.5s time transmitted by the SPI module from the first address of the second cache region; when all data transmitted by the SPI module within the later 0.5s are received and written, an address pointer of the second cache region points to the end address of the data transmitted by the written SPI module within the later 0.5s, and azimuth information data in the third cache region are written into the second cache region; and opening the time file created by the SD card module, enabling the address pointer of the SD card module to point to the tail address of the written data of the time file, and storing the data and the azimuth information data within the later 0.5s transmitted by the SPI module into the time file.
Data transmitted by the USART module and the SPI module within 1s form a data packet, and the data packet comprises data written into the SPI module of the first cache region within the first 0.5s time and data written into the SPI module of the second cache region within the second 0.5s time and azimuth information data; the writing mode of the data transmitted by the USART module and the SPI module in every 1s is carried out according to the steps, and no error leakage and frame loss are ensured during data transmission and storage.
After writing a data packet into the time file of the SD card module, the DSP processing chip judges whether the total data written in the time file reaches 1 minute duration, and if the total data does not reach 1 minute duration, the data of the next data packet is continuously stored into the time file in the SD card module; if the time length of 1 minute is reached, the time of the time information cache region is increased by 1 minute and then written into the time information cache region, and the previous time information is covered; the DSP processing chip judges whether the SD card module has a date folder of the modified time and date; if the date folder of the date exists, the DSP processing chip reads the modified time information of hour, minute and second in the time information cache region, and a next time file named according to the modified time information of hour, minute and second is created under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the modified year, month and day date information in the time information cache region, creates a next date folder named according to the modified year, month and day date information on the SD card module, reads the modified time, minute and second information in the time information cache region, and creates a next time file named according to the modified time, minute and second information under the new date folder; and then storing the data of the next data packet into the next time file in the SD card module.
The data stored in the SD card module is sent to a transceiver radio station 5 through a wireless transceiver module 4, and the transceiver radio station 5 receives the data sent by the wireless transceiver module 4 in real time and transmits the data to a PC 6; the data can be copied or deleted in the PC 6.
The technical scheme provided by the invention can realize ordered storage of a large amount of data by taking time as a file name, ensures no error and leakage of the data, and can intuitively transmit the data to the PC through a wireless communication mode so as to analyze and process the data. The transmission distance is long, and the defect that the transmission distance can only reach 3-5km in the existing wiring communication technology is overcome.
Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the claims of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A data recording system based on a suspended detection sonar is characterized by comprising a cabin body (1); a sonar sensor (2) connected with one end of the cabin body (1); an electronic processing board (3) arranged in the cabin body (1); a wireless transceiver module (4) connected with the cabin body (1) and the electronic processing board (3); a transceiver radio station (5) for making a communication connection with the radio transceiver module (4); a PC (6) connected with the transceiver radio station (5) through a data line; the electronic processing board (3) comprises a DSP processing chip, a USART module, an SPI module and an SD card module which are in communication connection with the DSP processing chip; the electronic processing board (3) resolves and records the obtained data; the recorded data is sent to a transceiving radio station (5) through a wireless transceiving module (4), and the transceiving radio station (5) receives the data sent by the wireless transceiving module (4) in real time and exchanges the data with a PC (6);
the electronic processing board (3) mounts a file system and allocates a first cache region, a second cache region, a third cache region and a time information cache region;
the data transmitted by the SPI module comprises target data information detected based on a suspension type detection sonar; the data transmitted by the USART module comprise position information and current time information based on the position of a suspended detection sonar; the DSP processing chip monitors whether data are transmitted in real time and judges the source of the data;
when the DSP processing chip detects that the USART module is transmitting data, the transmitted data content is judged; when the transmitted data content is time information, writing the time information into a time information cache region; the DSP processing chip judges whether the SD card module has a date folder of the time and the date; if the date folder of the date exists, the DSP processing chip reads time information of the hour, minute and second in the time information cache region, and a time file named according to the time information of the hour, minute and second is created under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the year, month and day date information in the time information cache region, creates a new date folder named according to the year, month and day date information on the SD card module, reads the time information of the hour, minute and second in the time information cache region, and creates a time file named according to the time information of the hour, minute and second under the new date folder; when the transmitted data content is azimuth information data based on the position of the suspended detection sonar, the DSP processing chip starts to write the data from the initial address of the third cache region, judges whether the third cache region is full after the data is written, and if the cache region is not full, an address pointer of the written data points to the end address of the written data; if the cache region is full, the address pointer of the written data points to the first address of the third cache region, and other written data are covered;
when the DSP processing chip detects that the SPI module transmits data, the data is written from the first address of the first cache region, and the data transmitted by the SPI module in the first 0.5s time is written into the first cache region; when the first cache area is full, opening the time file created by the SD card module, enabling the address pointer of the SD card module to point to the first address of the time file created by the SD card module, and storing data in the first 0.5s time transmitted by the SPI module into the time file; writing data in the last 0.5s time transmitted by the SPI module from the first address of the second cache region; when all data within the later 0.5s time transmitted by the SPI module are received and written, an address pointer of the second cache region points to the end address of the data within the later 0.5s time transmitted by the written SPI module, and azimuth information data in the third cache region is written into the second cache region; opening a time file created by the SD card module, wherein an address pointer of the SD card module points to a tail address of written data of the time file, and storing data and azimuth information data within the last 0.5s time transmitted by the SPI module into the time file;
data transmitted by the USART module and the SPI module within 1s form a data packet, and the data packet comprises data written into the SPI module of the first cache region within the first 0.5s time and data written into the SPI module of the second cache region within the second 0.5s time and azimuth information data; the writing mode of the data transmitted by the USART module and the SPI module in each 1s is carried out according to the steps, and no error, leakage and frame loss are ensured during data transmission and storage;
after writing a data packet into the time file of the SD card module, the DSP processing chip judges whether the total data written in the time file reaches 1 minute duration, and if the total data does not reach 1 minute duration, the DSP processing chip continues to store the data of the next data packet into the time file in the SD card module; if the time length of 1 minute is reached, increasing the time of the time information cache region by 1 minute, writing the time information into the time information cache region, and covering the previous time information; the DSP processing chip judges whether the SD card module has a date folder of the modified time and date; if the date folder of the date exists, the DSP processing chip reads the modified time information of hour, minute and second in the time information cache region, and a next time file named according to the modified time information of hour, minute and second is created under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the modified year, month and day date information in the time information cache region, creates a next date folder named according to the modified year, month and day date information on the SD card module, reads the modified time information of hour, minute and second in the time information cache region, and creates a next time file named according to the modified time information of hour, minute and second under the new date folder; then storing the data of the next data packet into the next time file in the SD card module;
the data stored in the SD card module is sent to a transceiving radio station (5) through a wireless transceiving module (4), and the transceiving radio station (5) receives the data sent by the wireless transceiving module (4) in real time and transmits the data to a PC (6); the PC 6 can copy or delete data.
2. A data recording method based on a suspended detection sonar is characterized by being applied to a data recording system based on a suspended detection sonar, wherein the data recording system based on a suspended detection sonar comprises a cabin body (1); a sonar sensor (2) connected with one end of the cabin body (1); an electronic processing board (3) arranged in the cabin body (1); the wireless transceiving module (4) is connected with the cabin body (1) and the electronic processing board (3); a transceiver radio station (5) for making a communication connection with the radio transceiver module (4); a PC (6) connected with the transceiver radio station (5) through a data line; the electronic processing board (3) comprises a DSP processing chip, a USART module, an SPI module and an SD card module, wherein the USART module, the SPI module and the SD card module are in communication connection with the DSP processing chip; the electronic processing board (3) resolves and records the obtained data; the electronic processing board (3) mounts a file system and allocates a first cache region, a second cache region, a third cache region and a time information cache region;
the data transmitted by the SPI module comprises target data information detected based on a suspension type detection sonar; the data transmitted by the USART module comprise position information and current time information based on the position of a suspended detection sonar; the DSP processing chip monitors whether data are transmitted in real time and judges the source of the data;
when the DSP processing chip detects that the USART module is transmitting data, the transmitted data content is judged; when the transmitted data content is time information, writing the time information into a time information cache region; the DSP processing chip judges whether the SD card module has a date folder of the time and the date; if the date folder of the date exists, the DSP processing chip reads time information of hour, minute and second in the time information cache region, and a time file named according to the time information of hour, minute and second is established under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the year, month and day date information in the time information cache region, creates a new date folder named according to the year, month and day date information on the SD card module, reads the time information of the hour, minute and second in the time information cache region, and creates a time file named according to the time information of the hour, minute and second under the new date folder; when the transmitted data content is azimuth information data based on the position of the suspended detection sonar, the DSP processing chip starts to write the data from the initial address of the third cache region, judges whether the third cache region is full after the data is written, and if the cache region is not full, an address pointer of the written data points to the end address of the written data; if the cache region is full, the address pointer of the written data points to the first address of the third cache region, and other written data are covered;
when the DSP processing chip detects that the SPI module transmits data, the data is written from the first address of the first cache region, and the data in the first 0.5s time transmitted by the SPI module is written into the first cache region; when the first cache area is full, opening the time file created by the SD card module, enabling the address pointer of the SD card module to point to the first address of the time file created by the SD card module, and storing data in the first 0.5s time transmitted by the SPI module into the time file; writing data in the last 0.5s time transmitted by the SPI module from the first address of the second cache region; when all data within the later 0.5s time transmitted by the SPI module are received and written, an address pointer of the second cache region points to the end address of the data within the later 0.5s time transmitted by the written SPI module, and azimuth information data in the third cache region is written into the second cache region; opening a time file created by the SD card module, enabling an address pointer of the SD card module to point to a tail address of data written in the time file, and storing data and azimuth information data within the last 0.5s time transmitted by the SPI module into the time file;
the data transmitted by the USART module and the SPI module within 1s form a data packet, and the data packet comprises data written into the SPI module of the first cache region within the first 0.5s time and data written into the SPI module of the second cache region within the second 0.5s time and azimuth information data; the writing mode of the data transmitted by the USART module and the SPI module in each 1s is carried out according to the steps, and no error, leakage and frame loss are ensured during data transmission and storage;
after writing a data packet into the time file of the SD card module, the DSP processing chip judges whether the total data written in the time file reaches 1 minute duration, and if the total data does not reach 1 minute duration, the data of the next data packet is continuously stored into the time file in the SD card module; if the time length of 1 minute is reached, the time of the time information cache region is increased by 1 minute and then written into the time information cache region, and the previous time information is covered; the DSP processing chip judges whether the SD card module has a date folder of the modified time and date; if the date folder of the date exists, the DSP processing chip reads the modified time information of hour, minute and second in the time information cache region, and a next time file named according to the modified time information of hour, minute and second is created under the date folder of the date; if the date folder of the time and date does not exist, the DSP processing chip reads the modified year, month and day date information in the time information cache region, creates a next date folder named according to the modified year, month and day date information on the SD card module, reads the modified time, minute and second information in the time information cache region, and creates a next time file named according to the modified time, minute and second information under the new date folder; then storing the data of the next data packet into the next time file in the SD card module;
the data stored in the SD card module is sent to a transceiving radio station (5) through a wireless transceiving module (4), and the transceiving radio station (5) receives the data sent by the wireless transceiving module (4) in real time and transmits the data to a PC (6); the PC 6 can copy or delete data.
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