CN115833962B - Low-power-consumption data acquisition method and device based on underwater acoustic communication - Google Patents
Low-power-consumption data acquisition method and device based on underwater acoustic communication Download PDFInfo
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- CN115833962B CN115833962B CN202310082245.2A CN202310082245A CN115833962B CN 115833962 B CN115833962 B CN 115833962B CN 202310082245 A CN202310082245 A CN 202310082245A CN 115833962 B CN115833962 B CN 115833962B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention discloses a low-power-consumption data acquisition method and device based on underwater acoustic communication. The sensor integrated unit can be provided with sensors such as a carbon dioxide concentration sensor, a salinity sensor, a hydrogen sulfide sensor and the like, can monitor submarine environment parameters for a long time without interruption, and transmits data to the sea surface through an underwater acoustic communication technology. The invention adopts two storage units, the storage capacity of the first storage unit is smaller than that of the second storage unit, the first storage unit is special for data analysis to generate summary information, the second storage unit is special for inquiring detailed data, the detailed information is only sent when inquiring, the data transmission quantity is reduced, the energy consumption is reduced, the data transmission error rate is reduced, and the working time of the data acquisition device continuously working on the seabed is prolonged.
Description
Technical Field
The invention relates to the field of ocean monitoring, in particular to a low-power-consumption data acquisition method and device based on underwater acoustic communication.
Background
Ocean is the origin of civilization of human beings, is also a precious resource treasure for human beings, and further knowledge and understanding of the ocean can be realized by human beings, so that the long-term continuous monitoring of the parameters such as PH value, water temperature, salinity, ocean current, carbon dioxide concentration and the like can be realized. In particular, in the exploitation process of natural gas, petroleum and other resources in the ocean, environmental parameters such as methane concentration, hydrogen sulfide concentration, dissolved oxygen concentration and the like in the relevant sea area are required to be continuously obtained so as to prevent serious ocean environmental pollution caused by leakage.
In the prior art, continuous and accurate marine environment parameter data can be acquired by using the submerged data acquisition device. For application scenes such as marine pollution monitoring, pipeline leakage monitoring, disaster early warning and earthquake monitoring, the data collected in most of time have little fluctuation because of the normal state in most of the cases, and the information is not required to be completely sent out, so that energy consumption is caused. Moreover, as the submerged data acquisition device is usually powered by a battery pack, the battery pack cannot be charged by solar energy, the cost of the underwater power generation technology is high, and the process of salvaging, replacing and laying the submerged data acquisition device is complicated.
Reducing energy consumption is one of the very important research directions for a submersible data collection device. In the submerged data acquisition device, the underwater acoustic communication module is a main energy consumption module of the submerged data acquisition device, so that the submerged data acquisition device has significance in reducing the data communication quantity and prolonging the working time.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a low-power-consumption data acquisition method and device based on underwater acoustic communication. In order to achieve the above object, the following technical scheme is provided:
the low-power-consumption data acquisition device based on underwater acoustic communication is characterized by comprising a processor unit, a sensor unit, a first storage unit, a second storage unit, a data receiving and transmitting unit, a battery pack, an underwater acoustic communication machine and a transducer;
the data acquired by the sensor unit are processed by the processor unit and then stored in the first storage unit and the second storage unit; the storage capacity of the first storage unit is smaller than the storage capacity of the second storage unit;
the first storage unit comprises a data analysis module and a data storage module, wherein the data analysis module performs statistical analysis on data stored by the data storage module according to a set time interval to generate summary information; the data volume of the summary information is smaller than the data volume stored by the data storage module; after the summary information is generated, the summary information is timely sent out through the data receiving and transmitting unit, the underwater acoustic communication machine and the transducer in sequence;
when a data query signal is received, the processor unit analyzes the data query signal, obtains query parameters, queries detailed information from the second storage unit according to the query parameters, and transmits the queried detailed information to the data transceiver unit, the underwater acoustic communication machine and the transducer in sequence.
As a further development of the invention, the sensor unit is interconnected with the processor unit, which supplies power to the sensor unit and the data transceiver unit; the battery pack supplies power to the processor unit;
the underwater acoustic communication machine is connected with the data receiving and transmitting unit, the underwater acoustic communication machine is connected with the transducer, the underwater acoustic communication machine is used for modulating and demodulating electric signals, and the transducer is used for converting between sound energy and electric energy.
As a further development of the invention, the battery pack employs a disposable lithium battery.
As a further improvement of the present invention, the first storage unit and the second storage unit store data in a cyclic coverage manner.
As a further development of the invention, the sensor unit comprises any one of a carbon dioxide concentration sensor, a salinity sensor, a hydrogen sulfide sensor, a dissolved oxygen sensor, a methane concentration sensor, a PH sensor, an inclination sensor, a temperature sensor, a pressure sensor, a tide level sensor, a sea current sensor, a wave sensor.
The low-power-consumption data acquisition method based on underwater acoustic communication is applied to the low-power-consumption data acquisition device based on underwater acoustic communication, and is characterized in that,
step 1: the sensor unit performs data acquisition;
step 2: processing acquired data and respectively storing the acquired data into a first storage unit and a second storage unit;
step 3: carrying out statistical analysis on the data stored in the data storage module according to the set time interval to obtain the total number of data records and the number of abnormal values;
step 4: calculating the ratio of the number of abnormal values to the total number of data records, and executing the step 5 if the ratio is smaller than a set threshold value; if the ratio is not less than the set threshold, executing the step 6;
step 5: removing abnormal values to generate summary information, wherein the summary information comprises the total number of data records, the number of abnormal values, the maximum value, the minimum value, the average value, the median and the standard deviation;
step 6: taking all abnormal values as summary information;
step 7: and the summary information is timely sent out through the data receiving and transmitting unit, the underwater acoustic communication machine and the transducer.
As a further improvement scheme of the invention, the method for judging the abnormal value is that the acquired data x is calculated according to a formula (1) to obtain Z, when the absolute value is |Z| >3, x is the abnormal value, mu is the mean value, sigma is the standard deviation, and mu and sigma are preset according to experimental data;
as a further improvement of the present invention, the removing abnormal values generates summary information, where the summary information further includes a start value, an end value, a start time, and an end time, where the start value and the start time are a data value collected at an earliest time point stored in the storage module of the first storage unit and a collection time thereof, and the end value and the end time are a data value collected at a latest time point stored in the storage module of the first storage unit and a collection time thereof.
As a further improvement scheme of the invention, when the data query signal is received, the processor unit analyzes the data query signal, acquires the query parameter, queries the detailed information from the second storage unit according to the query parameter, and transmits the queried detailed information through the data transceiver unit, the underwater acoustic communication machine and the transducer in sequence.
As a further improvement of the present invention, the detailed information is transmitted when the summary information is not transmitted.
The beneficial effects of the invention are as follows:
1. the data storage module stored by the first storage unit is used for storing data acquired in real time, and the data analysis module periodically performs statistical analysis on the data storage module to generate summary information with smaller data volume, so that the data transmission volume is reduced, and important information is transmitted in time.
2. And when the data in more detail is needed to be known, corresponding data stored in the second storage unit is acquired through the query signal, and when no abnormal or interested data is found through the summary information, the corresponding detailed data is not queried, so that the data transmission quantity is reduced.
3. The energy consumption is reduced, the data transmission error rate is reduced, and the working time of continuous working of the data acquisition device on the seabed is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be considered as limiting the scope.
FIG. 1 is a schematic diagram of a low-power-consumption data acquisition device based on underwater acoustic communication;
fig. 2 is a flow chart of the low power consumption data acquisition method based on underwater acoustic communication.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Example 1
As shown in FIG. 1, the low-power-consumption data acquisition device based on underwater acoustic communication comprises a processor unit, a sensor unit, a first storage unit, a second storage unit, a data receiving and transmitting unit, a battery pack, an underwater acoustic communication machine and a transducer.
The sensor unit is connected with the processor unit through the communication interface, the processor unit supplies power for the sensor unit and the data receiving and transmitting unit, and the battery pack supplies power for the processor unit. The battery pack adopts disposable lithium batteries, and is connected in series and parallel to form the required voltage and capacity according to the requirements. The underwater acoustic communication machine is connected with the data receiving and transmitting unit, the underwater acoustic communication machine is connected with the transducer, the underwater acoustic communication machine is used for modulating and demodulating electric signals, and the transducer is used for converting between sound energy and electric energy. The sensor unit comprises any one of a carbon dioxide concentration sensor, a salinity sensor, a hydrogen sulfide sensor, a dissolved oxygen sensor, a methane concentration sensor, a PH sensor, an inclination sensor, a temperature sensor, a pressure sensor, a tide level sensor, a ocean current sensor and a wave sensor.
The sensor unit collects data, the collected data are sent to the processor unit through the communication interface, and the processor unit analyzes the data and then stores the data in the first storage unit and the second storage unit. The storage capacity of the first storage unit is smaller or much smaller than the storage capacity of the second storage unit. Two storage units are adopted, wherein the first storage unit is special for data analysis, and the second storage unit is special for data query. Of course, the first storage unit and the second storage unit may use the same data acquisition frequency, or may use different data acquisition frequencies according to actual needs.
The first storage unit comprises a data analysis module and a data storage module, and the data analysis module performs statistical analysis on the data stored by the data storage module according to a set time interval to generate summary information. The data volume of the summary information is smaller or far smaller than the data volume stored by the data storage module, and the summary information is timely sent out after being generated by sequentially passing through the data receiving and sending unit, the underwater acoustic communication machine and the transducer.
Preferably, the first storage unit and the second storage unit store data in a cyclic coverage manner. When the capacity of the storage unit is to be filled with data, the new data overwrites the earliest acquired data in the storage unit. The set time interval of the data analysis module can be set according to the capacity and the acquisition rate of the storage unit.
Preferably, the client can query the detailed information by transmitting a query signal according to the summary information if it feels necessary to further understand the detailed information. When the underwater acoustic communication-based low-power-consumption data acquisition device receives a data query signal, the processor unit analyzes the data query signal to obtain a query parameter, queries detailed information from the second storage unit according to the query parameter, and sequentially transmits the queried detailed information through the data transceiver unit, the underwater acoustic communication machine and the transducer for data transmission. Thus, if the collected data are known to be normal according to the summary information, the fluctuation is small, and a large amount of detailed data is not required to be sent to the client, so that energy is wasted.
Example 2
As shown in fig. 2, a low-power-consumption data acquisition method based on underwater acoustic communication is applied to the low-power-consumption data acquisition device based on underwater acoustic communication in the above-mentioned embodiment 1, and includes the following steps,
step 1: the sensor unit performs data acquisition.
Step 2: and processing the acquired data and respectively storing the acquired data in a first storage unit and a second storage unit.
Step 3: and carrying out statistical analysis on the data stored in the data storage module according to the set time interval to obtain the total number of data records and the number of abnormal values.
Step 4: calculating the ratio of the number of abnormal values to the total number of data records, and executing the step 5 if the ratio is smaller than a set threshold value; if the ratio is not less than the set threshold, step 6 is performed.
Step 5: removing the abnormal values to generate summary information, wherein the summary information comprises the total number of data records, the number of the abnormal values, the maximum value, the minimum value, the average value, the median and the standard deviation.
Step 6: all outliers were taken as summary information.
Step 7: and the summary information is timely sent out through the data receiving and transmitting unit, the underwater acoustic communication machine and the transducer.
In step 3, the method for determining the outlier is that the collected data x is calculated according to formula (1) to obtain Z, where Z represents the distance between the data x and the average μ, and when the distance is further, the probability that x is the outlier is greater. In general, when the absolute value |z| >3, data x is an outlier, μ is a mean value, and σ is a standard deviation, where μ and σ are calculated from experimental data previously performed in the installation environment. Of course, the values of μ and σ may also be updated by extracting samples to recalculate μ and σ based on data actually collected after the device is installed and setting them into the device by communication means.
In step 4, the ratio of the number of abnormal values to the total number of data records is calculated, whether the ratio is smaller than a preset threshold value is judged, if so, the abnormal values are considered to be data anomalies possibly caused by interference, hardware reasons, occasional factors and the like in the data acquisition process, and the summary information calculated after the data are removed is more accurate and objective. When the ratio is not smaller than a preset threshold, abnormal conditions, such as leakage, hardware faults and the like, are indicated, all abnormal value conditions are sent back for research and analysis, and if the information is insufficient, data information of more information can be further obtained by sending a query signal.
And 5, eliminating abnormal values to generate summary information, wherein the summary information further comprises a start value, an end value, a start time, an end time, a start value and a start time which are the data values collected at the earliest time point stored in the storage module of the first storage unit and the collection time thereof, and the end value and the end time are the data values collected at the latest time point stored in the storage module of the first storage unit and the collection time thereof. After receiving the summary information, if necessary, the start time and the end time may be used as parameters of the query signal to obtain more detailed data information.
Preferably, when the data query signal is received, the processor unit analyzes the data query signal, obtains the query parameter, queries the detailed information from the second storage unit according to the query parameter, and transmits the queried detailed information through the data transceiver unit, the underwater acoustic communication machine and the transducer in sequence. Preferably, the transmission of the summary information is prioritized over the transmission of the detailed information, so that the detailed information is set to be transmitted when the summary information is not transmitted, so that the transmission of the summary information is not affected.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The low-power-consumption data acquisition device based on underwater acoustic communication is characterized by comprising a processor unit, a sensor unit, a first storage unit, a second storage unit, a data receiving and transmitting unit, a battery pack, an underwater acoustic communication machine and a transducer;
the data acquired by the sensor unit are processed by the processor unit and then stored in the first storage unit and the second storage unit; the storage capacity of the first storage unit is smaller than the storage capacity of the second storage unit; the first storage unit is dedicated to data analysis, and the second storage unit is dedicated to data query;
the first storage unit comprises a data analysis module and a data storage module, wherein the data analysis module performs statistical analysis on data stored by the data storage module according to a set time interval to generate summary information; the data volume of the summary information is smaller than the data volume stored by the data storage module; after the summary information is generated, the summary information is timely sent out through the data receiving and transmitting unit, the underwater acoustic communication machine and the transducer in sequence;
when a data query signal is received, the processor unit analyzes the data query signal, obtains query parameters, queries detailed information from the second storage unit according to the query parameters, and transmits the queried detailed information to the data transceiver unit, the underwater acoustic communication machine and the transducer in sequence.
2. The underwater acoustic communication based low-power consumption data acquisition device of claim 1, wherein,
the sensor unit is connected with the processor unit, and the processor unit supplies power for the sensor unit and the data receiving and transmitting unit; the battery pack supplies power to the processor unit;
the underwater acoustic communication machine is connected with the data receiving and transmitting unit, the underwater acoustic communication machine is connected with the transducer, the underwater acoustic communication machine is used for modulating and demodulating electric signals, and the transducer is used for converting between sound energy and electric energy.
3. The underwater acoustic communication based low-power consumption data acquisition device according to claim 2, wherein,
the battery pack adopts a disposable lithium battery.
4. A low-power consumption data acquisition device based on underwater acoustic communication according to claim 3, wherein,
the first storage unit and the second storage unit store data in a cyclic coverage mode.
5. The underwater acoustic communication based low-power consumption data acquisition device of claim 1, wherein,
the sensor unit comprises any one of a carbon dioxide concentration sensor, a salinity sensor, a hydrogen sulfide sensor, a dissolved oxygen sensor, a methane concentration sensor, a PH sensor, an inclination sensor, a temperature sensor, a pressure sensor, a tide level sensor, a ocean current sensor and a wave sensor.
6. The underwater acoustic communication-based low-power consumption data acquisition method is applied to the underwater acoustic communication-based low-power consumption data acquisition device according to any one of claims 1 to 5, and is characterized in that,
step 1: the sensor unit performs data acquisition;
step 2: processing acquired data and respectively storing the acquired data into a first storage unit and a second storage unit; the first storage unit is dedicated to data analysis, and the second storage unit is dedicated to data query;
step 3: carrying out statistical analysis on the data stored in the data storage module according to the set time interval to obtain the total number of data records and the number of abnormal values;
step 4: calculating the ratio of the number of abnormal values to the total number of data records, and executing the step 5 if the ratio is smaller than a set threshold value; if the ratio is not less than the set threshold, executing the step 6;
step 5: removing abnormal values to generate summary information, wherein the summary information comprises the total number of data records, the number of abnormal values, the maximum value, the minimum value, the average value, the median and the standard deviation;
step 6: taking all abnormal values as summary information;
step 7: and the summary information is timely sent out through the data receiving and transmitting unit, the underwater acoustic communication machine and the transducer.
7. The underwater acoustic communication based low power consumption data acquisition method of claim 6, wherein the method for acquiring the outlier is that the acquired data x is calculated according to formula (1) to obtain Z, when the absolute value |z| >3, x is the outlier, μ is the mean value, σ is the standard deviation, wherein μ and σ are preset according to experimental data,
8. the underwater acoustic communication based low-power consumption data acquisition method of claim 7, wherein,
and (5) eliminating abnormal values to generate summary information, wherein the summary information further comprises a start value, an end value, a start time and an end time, the start value and the start time are data values collected at the earliest time point stored in a storage module of the first storage unit and the collection time thereof, and the end value and the end time are data values collected at the latest time point stored in the storage module of the first storage unit and the collection time thereof.
9. The underwater acoustic communication based low-power consumption data acquisition method of claim 6, wherein,
when the data query signal is received, the processor unit analyzes the data query signal, obtains query parameters, queries detailed information from the second storage unit according to the query parameters, and sequentially transmits the queried detailed information through the data transceiver unit, the underwater acoustic communication machine and the transducer.
10. The underwater acoustic communication based low-power consumption data acquisition method of claim 9, wherein,
the detailed information is transmitted when the summary information is not transmitted.
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