CN112020004A - Coastal zone pollutes early warning system - Google Patents
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- CN112020004A CN112020004A CN202010897632.8A CN202010897632A CN112020004A CN 112020004 A CN112020004 A CN 112020004A CN 202010897632 A CN202010897632 A CN 202010897632A CN 112020004 A CN112020004 A CN 112020004A
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- H—ELECTRICITY
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention provides a coastal zone pollution early warning system which comprises a plurality of data acquisition terminals, a plurality of data aggregation terminals and a remote monitoring and early warning center. The research of the invention not only can remotely implement all-weather and real-time dynamic monitoring on key sewage discharge industry, but also can lay monitoring nodes aiming at the target water area, realize network monitoring, establish an early warning system, master the generation, distribution and diffusion conditions of pollutants at any time, realize early warning monitoring on the key monitored water area and realize advanced monitoring.
Description
Technical Field
The application relates to the technical field of information early warning, in particular to a vehicle-mounted safety auxiliary system.
Background
The coastal zone is a sea-land intersection line, and the forces from both land and sea jointly form the natural environment of the coastal area. Whether it is a change of sea area or a change of land area, it can directly or indirectly affect the environment of the coastal area. In recent years, coastal areas become areas with most active economic construction activities of various cities, along with gathering of more and more industries to coastal areas, vitality is injected for the vigorous development of coastal areas, the ecological environment pressure borne by precious coastal area resources is increasingly increased, disordered development, natural ecological space deficiency, serious coastal water pollution and the like of coastal areas are common problems in the rapid development period of coastal cities, and special planning for enhancing coastal area protection and reasonable development and utilization is very necessary.
Related planning establishment has been tried in a plurality of coastal cities in China, but due to the lack of corresponding technical specifications and standards and related pollution monitoring and early warning mechanisms, systematic coastal zone environment protection planning practices are lacked for offshore water area environment treatment, and the technical problem which needs to be solved urgently is solved.
Disclosure of Invention
The application provides a coastal zone pollutes early warning system, reports pollution monitoring data to remote control center through wireless sensor WSN network, mobile data network, and the staff just can realize not just not needing to get into in the sewage discharge environment 24 hours incessant real-time supervision to by the monitoring water body to in time send the early warning to the pollution that appears.
The technical scheme adopted by the application is as follows:
a coastal zone pollution early warning system is composed of a plurality of data acquisition terminals, a plurality of data aggregation terminals and a remote monitoring and early warning center;
the data acquisition terminal is arranged on the water surface of a target coastal zone close to the shore, the data aggregation terminal is arranged at the position, without shielding, of the target coastal zone, the data acquisition terminal is used for acquiring pollution data of the target coastal zone and sending the pollution data to the data aggregation terminal for processing, the data aggregation terminal uploads the processed pollution data to a remote monitoring and early warning center, the pollution data is analyzed and processed by the remote monitoring and early warning center, and early warning linkage is carried out according to an analysis and processing result.
The data acquisition terminal adopts self-sufficient charging and discharging equipment, and the self-sufficient charging and discharging equipment comprises a solar cell panel, a storage battery and amplitude power generation equipment;
the data gathering terminal adopts a storage battery for power supply, and the solar cell panel circularly charges the storage battery;
the data acquisition terminal and the data aggregation terminal jointly form a ZIGBEE wireless sensing network with a star network topology structure, the data acquisition node transmits positioning data of the nodes and water quality data acquired by the sensors to the data aggregation node in real time through the wireless sensing network, and the data aggregation node transmits information such as water quality monitoring data and the positioning data of the acquisition nodes to a monitoring center of a supervision department through a GPRS (general packet radio service) or 4G network after processing and packaging the information;
the application software operated by the computer of the remote monitoring center is developed based on GPRS or network communication technology, realizes real-time and on-site marking of monitoring data by loading html pages of a Baidu map through an ActiveX control, and performs data analysis and track display by using report forms and drawing functions.
Furthermore, the controller unit adopts a 32-bit low-power-consumption embedded central processing unit chip ARM9 series S3C2410 processor of Samsung company, the highest operation can be carried out at 203MHz, the hardware resources integrated in the processor are rich, the expandability of peripheral circuits is very good, and the core processor is provided with an ADC part and is convenient to access various sensors to acquire analog signals.
Further, the GPS positioning module adopts a GPS receiving chip U-BLOX-6010 with the minimum size, which is released by U-BLOX corporation.
Furthermore, the Zigbee module selects a CC2430 chip of TI company, and the CC2430 includes an RF transceiver, and also integrates a FLASH memory of enhanced 8051MCU and 32/64/125kB, a TAM and ADC of 8kB, a DMA, a doorway, and the like, and operates in a 2.4GHz band.
Furthermore, the sensor unit is connected with a PH, turbidity and temperature sensor through an A/D conversion interface, and the sensor outputs a 4-20mA standard current signal.
Furthermore, the power module is powered by solar energy and a storage battery, the total power consumption of the system is about 1.2W, the capacity of the storage battery is 10000mah multiplied by 5v =50000mwh, and the maximum output of the solar panel is 6W.
Furthermore, the data aggregation terminal is consistent with the sensor node in composition, compared with the sensor node, a GPRS/4G communication module is added, and the GSM/GPRS dual-frequency SIM900 wireless module promoted by SIMCom is selected as the GPRS module.
Furthermore, other support modules are additionally connected to the data convergence terminal and comprise an SD external storage module, a FLASH expansion module, a clock circuit and an LCD display module.
Furthermore, the data acquisition terminal is a marine monitoring device which floats on the surface of the sea and is used for observing surface ocean current, surface water temperature and salinity environmental factors, has extremely good air tightness in structure, and fully ensures that key parts of an internal power supply and a control circuit are isolated from the sea water.
Furthermore, a columnar annular permanent magnet of the data acquisition terminal is used as a vibrator of the generator and sleeved on a smooth Teflon shaft, the two ends of the columnar annular permanent magnet are respectively fixed with a disc-shaped permanent magnet, the annular permanent magnet vibrator is suspended by utilizing magnetic thrust generated by the repulsion of like poles, the vibrator is arranged in a cylinder wound with a winding coil, a gap as small as possible is kept between the vibrator and the cylinder, and the winding coil is tightly attached to the soft iron core cylinder.
Through the embodiment of the application, the following technical effects can be obtained:
1) pollution monitoring data are reported to a remote monitoring and early warning center through a wireless sensor WSN (wireless sensor network) and a mobile data network, and workers can realize 24-hour uninterrupted real-time monitoring on a monitored water body without entering a sewage discharge environment;
2) the method includes the steps that accurate region monitoring is conducted through high-precision GPS positioning, data acquisition terminals are distributed in relevant regions and the like, large-range continuous monitoring can be conducted on a monitored coastal zone along the line by combining a certain algorithm, and early warning is timely sent out for pollution.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
FIG. 1 is a schematic diagram of the construction of the coastal zone pollution early warning system of the present application;
fig. 2 is a schematic diagram of a composition structure of a data acquisition terminal in the pollution early warning system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a pollution early warning system in a coastal zone, which is composed of a plurality of data acquisition terminals, a plurality of data aggregation terminals and a remote monitoring and early warning center, according to the present application;
the data acquisition terminal is arranged on the water surface of a target coastal zone close to the shore, the data aggregation terminal is arranged at the position, without shielding, of the target coastal zone, the data acquisition terminal is used for acquiring pollution data of the target coastal zone and sending the pollution data to the data aggregation terminal for processing, the data aggregation terminal uploads the processed pollution data to a remote monitoring and early warning center, the pollution data is analyzed and processed by the remote monitoring and early warning center, and early warning linkage is carried out according to an analysis and processing result.
The data acquisition terminal adopts self-sufficient charging and discharging equipment, and the self-sufficient charging and discharging equipment comprises a solar cell panel, a storage battery and amplitude power generation equipment;
the data gathering terminal adopts a storage battery for power supply, and the solar cell panel circularly charges the storage battery;
how to accurately select the coastal zone pollution monitoring index is an important content of coastal zone pollution early warning, and considering that the underground water close to the coastal zone area is influenced by seawater invasion, the salt content in the underground water is relatively high, and the accuracy of monitoring index data can be influenced. In the present application, the index data monitored by the sensors include conductivity, ammonia nitrogen content, pH value, and the like of the seawater.
The data acquisition nodes and the data aggregation nodes jointly form a ZIGBEE wireless sensing network with a star network topology structure. And the data acquisition node transmits the positioning data of the node and the water quality data acquired by the sensor to the data aggregation node in real time through the wireless sensing network. And the data aggregation node processes and packages information such as water quality monitoring data and positioning data of the acquisition nodes and transmits the information to a monitoring center of a supervision department through a GPRS or 4G network. The application software operated by the computer of the remote monitoring center is developed based on GPRS or network communication technology, realizes real-time and on-site marking of monitoring data by loading html pages of a Baidu map through an ActiveX control, and performs data analysis and track display by using report forms and drawing functions.
1) Controller unit
The embedded type central processing unit chip ARM9 series S3C2410 processor with 32 bits and low power consumption of the Samsung company is adopted, the highest operation can be carried out at 203MHz, the hardware resources integrated in the processor are rich, the expandability of a peripheral circuit is very good, and the core processor is provided with an ADC part and is convenient to access various sensors to acquire analog signals.
2) GPS positioning module
The GPS receiving chip U-BLOX-6010 with the minimum size, which is released by U-BLOX corporation, is adopted, the chip adopts an 8x8 mm MLF small packaging mode, satellite signals can be received in remote areas or areas with weak signals, an interface communication protocol is simple, integration is easy, the positioning accuracy can reach 2 meters, and the use requirements are completely met.
3) Zigbee module
CC2430 chip of TI company is selected and meets IEEE802.10.4 standard. The CC2430 integrates an enhanced 8051MCU, a FLASH memory of 32/64/125kB, a TAM and ADC of 8kB, a DMA, a door watching port and the like besides an RF transceiver, operates a 2.4GHz frequency band, adopts low voltage (2.0-3.6V) for power supply, and has very low power consumption, high sensitivity and high transmission rate.
4) Sensor unit
The sensor is connected with sensors of PH, turbidity, temperature and the like through an A/D conversion interface, and the sensors output 4-20mA standard current signals.
5) Power supply module
Solar energy and a storage battery are adopted for power supply. The total power consumption of the system is about 1.2W, the capacity of the storage battery is 10000mah multiplied by 5v =50000mwh, the maximum output of the solar panel is 6W, the solar panel can obtain electric energy 27000mw every day according to illumination for nine hours a day and the efficiency is calculated to be 50%, and the solar panel can sufficiently support consumption for one day and night, so that the endurance time can reach more than seven days under the condition of good weather.
The hardware composition of the sink node is basically consistent with that of the sensor node, compared with the sensor node, a GPRS/4G communication module is added, and the GPRS module selects a GSM/GPRS dual-frequency SIM900 wireless module promoted by SIMCom. SMT encapsulation, built-in TCP/IP protocol set, does not need to carry out extra processing operation related to TCP/IP protocol in ARM chip, uses simple AT instruction just can conveniently realize operations such as GPRS network connection, data transmission and receiving.
In addition, although the data sink node is integrated with a sensor reading circuit, whether the sensor is accessed or not can be selected according to actual conditions in the using process, and in addition, in order to ensure the stability and reliability of the system, other supporting modules are additionally accessed to the sink node: the SD memory module, the FLASH expansion module, the clock circuit, the LCD display module and the like.
The software part is mainly divided into the following subsystems: login verification, main interface display, system setting, data query, data transmission and the like. In the login procedure, one account is set. The root account is not deletable and is permanently valid for logging in the event of a loss of line to the identity database. When the identity database is online, the system firstly links the database and compares the input user name and the password in the database. If the database has corresponding records, the login is judged to be successful, and the interface is entered, otherwise, the user name or password is prompted to be wrong, and the user name or password is prevented from entering the next interface. After the login is successful, the host interface is entered, the set command is sent to the central node by the upper computer in the setting process, and the central node distributes the set command to each acquisition node. The node is mainly provided with three setting items of acquisition time, dormancy or not and an alarm threshold value, wherein the acquisition time and the dormancy or not are instructions sent to the node, and the alarm threshold value is an instruction of an upper computer. And after the upper computer is communicated with the nodes, the instruction is retransmitted every five seconds to ensure that the setting is effective. After the threshold value is set, the upper computer analyzes the returned data, and if the data exceeds the threshold value range, alarm information is generated below the interface and the data of the alarm node is displayed. In the running process of the system, after the software is connected with the upper computer database, historical data can be inquired, and all historical data can be read. And when one record is read, additionally displaying the record in a dialog box, and drawing points of the historical data through a vector container to form a historical curve.
In order to make data transmission more reliable and reduce programming complexity, the TCP protocol is used as a data transmission means in the design. TCP (Transmission Control Protocol) is a connection-oriented, reliable transport-layer communication Protocol based on byte streams [3-4 ]. The data communication format is customized as follows: the FF AA XXXX XX XX XX (time field) FF BB XX XX XX XX (longitude and latitude) FF CC XX (turbidity) FF DD XX (acidity and alkalinity) FF EE XX (temperature) FF FF FF FF FF FF FF XX (temperature) data communication packet starts with FF, takes FF FF as an end mark, and is defined by grouping five parameters respectively by AA BB CC DD EE five-group letters. The positions of all nodes are distinguished by ZIGBEE module addresses, and in a ZIGBEE network, all communication module addresses are unique, so that a program can obtain real-time data of different nodes only by polling data by modules with different addresses.
The data acquisition terminal is a marine monitoring device which floats on the surface of the sea and is used for observing environmental factors such as surface ocean current, surface water temperature, salinity and the like, has extremely good air tightness in structure, and fully ensures that key components such as an internal power supply, a control circuit and the like are isolated from the sea water. The specially processed novel linear vibration generator is fixed inside the data acquisition terminal, continuously generates electric energy along with the wave-following flow-by-flow of the data acquisition terminal, and is stored in the rechargeable battery through the electric energy post-processing circuit.
The linear vibration generator has advantages of small volume, simple structure, etc., and generates electricity by using ubiquitous mechanical vibration, so that it is gradually used in various power generation systems. For the data acquisition terminals arranged in the ocean, the data acquisition terminals can fluctuate along with the fluctuation of the waves. If the linear vibration generator is arranged in the data acquisition terminal, the wave energy is converted into the electric energy for utilization by utilizing the vibration of the generator vibrator, and the problem that the service life of the data acquisition terminal is limited due to the limited capacity of the power supply of the drift data acquisition terminal is solved.
Fig. 2 shows the basic structure of a magnetic push type linear vibration generator for a drift data acquisition terminal power generation system. The generator belongs to a novel permanent magnet built-in linear vibration generator, adopts a permanent magnet vibrator which vertically and linearly reciprocates as the excitation of the motor, can be directly matched with the fluctuation movement characteristics of waves, simplifies the conversion process of wave energy, and more importantly, has higher power density and power factor.
As shown in the figure, a columnar annular permanent magnet is used as a vibrator of a generator and sleeved on a smooth Teflon shaft, the two ends of the columnar annular permanent magnet are respectively fixed with a disc-shaped permanent magnet, and the vibrator of the annular permanent magnet is suspended by utilizing magnetic thrust generated by homopolar repulsion between magnetic poles. The vibrator is arranged in the cylinder wound with the winding coil, and a gap as small as possible is kept between the vibrator and the cylinder. Meanwhile, the winding coil is tightly attached to the soft iron core cylinder to enhance the magnetic conductivity of the generator and further improve the performance of the generator.
As shown in figure 2, the annular permanent magnet vibrator is suspended due to the thrust action of the permanent magnets at the two ends of the annular permanent magnet vibrator, and is sleeved on a Teflon cylinder with excellent smoothness, the friction resistance borne by the vibrator in the vibration process is extremely small, when the data acquisition terminal fluctuates along with wave flow, the generator can fluctuate along with the wave, the annular permanent magnet vibrator suspended in the air is easy to reciprocate due to the small friction resistance borne by the annular permanent magnet vibrator and the magnetic thrust action at the two ends of the annular permanent magnet vibrator, and generates relative displacement with surrounding winding coils, so that the magnetic chain of the winding coils is changed, alternating induced electromotive force is generated in the winding coils, and electric energy is provided for external equipment.
Under the condition of no load, when the permanent magnet vibrator moves downwards from the highest point, the flux linkage in the winding coil is gradually enlarged, and negative induced electromotive force is generated in the winding, when the center of the permanent magnet vibrator is superposed with the middle position of the winding coil, the flux linkage in the winding coil reaches the maximum, and the induced electromotive force is zero, and when the permanent magnet vibrator continues to move downwards from the middle position of the winding, the flux linkage in the winding coil is gradually reduced, and positive induced electromotive force is generated in the winding. Similarly, when the permanent magnet vibrator moves upwards from the lowest point, the flux linkage in the winding coil undergoes a process of increasing and then decreasing, and accordingly induced electromotive force from negative to positive is generated.
Besides the design parameters of the generator, the vibration speed of the permanent magnet vibrator also directly influences the magnitude of the induced electromotive force. For a linear vibration generator applied to a data acquisition terminal, the key factor influencing the speed of the vibrator is the amplitude and frequency of sea surface waves, and the randomness of the waves determines that the analysis of the induced electromotive force of the generator can only be qualitative and cannot be quantitative. Therefore, the generation process of the generator induced electromotive force in the data acquisition terminal is qualitatively analyzed through the process. It should be noted that, in the no-load condition, there is no induced current in the winding coil, and therefore the influence of the self-induced flux linkage on the permanent magnet vibrator is not considered, and the output voltage (i.e. induced electromotive force) of the generator is high. In practical application, the actual output voltage of the generator will be reduced due to the self-inductance flux linkage generated by the induced current in the winding coil and the influence of different loads.
The output voltage of the miniature linear vibration generator is usually lower and extremely irregular, especially under the condition of power generation by utilizing wave energy in the sea, for a 9-15V power supply adopted by a common buoy, if the electric energy output by the generator is directly used for charging after rectification and filtering, the efficiency is extremely low, and by adopting a boost type switching power supply chip with higher conversion efficiency, the boost type switching power supply chip not only can provide a wider input voltage range, but also can furthest ensure the stability of the output voltage (namely the charging voltage of a battery), and reduces the influence on the service life of the battery due to the instability of the charging voltage while improving the charging efficiency of the battery.
In the face of increasingly serious water pollution situation in China, the traditional pollution monitoring mode of single function and passive monitoring, namely sampling detection and fixed-point monitoring, is not careful. The research of the invention not only can remotely implement all-weather and real-time dynamic monitoring on key sewage discharge industry, but also can lay monitoring nodes aiming at the target water area, realize network monitoring, establish an early warning system, master the generation, distribution and diffusion conditions of pollutants at any time, realize early warning monitoring on the key monitored water area and realize advanced monitoring. At present, the system is tested in the lake of school, and the data acquisition and network sending functions of the system nodes are stable and reliable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A coastal zone pollution early warning system is characterized in that the pollution early warning system consists of a plurality of data acquisition terminals, a plurality of data aggregation terminals and a remote monitoring and early warning center;
the data acquisition terminal is arranged on the water surface of a target coastal zone close to the shore, the data aggregation terminal is arranged at the position, without shielding, of the target coastal zone, the data acquisition terminal is used for acquiring pollution data of the target coastal zone and sending the pollution data to the data aggregation terminal for processing, the data aggregation terminal uploads the processed pollution data to a remote monitoring and early warning center, the pollution data is analyzed and processed by the remote monitoring and early warning center, and early warning linkage is carried out according to an analysis and processing result.
The data acquisition terminal adopts self-sufficient charging and discharging equipment, and the self-sufficient charging and discharging equipment comprises a solar cell panel, a storage battery and amplitude power generation equipment;
the data gathering terminal adopts a storage battery for power supply, and the solar cell panel circularly charges the storage battery;
the data acquisition terminal and the data aggregation terminal jointly form a ZIGBEE wireless sensing network with a star network topology structure, the data acquisition node transmits positioning data of the nodes and water quality data acquired by the sensors to the data aggregation node in real time through the wireless sensing network, and the data aggregation node transmits information such as water quality monitoring data and the positioning data of the acquisition nodes to a monitoring center of a supervision department through a GPRS (general packet radio service) or 4G network after processing and packaging the information;
the application software operated by the computer of the remote monitoring center is developed based on GPRS or network communication technology, realizes real-time and on-site marking of monitoring data by loading html pages of a Baidu map through an ActiveX control, and performs data analysis and track display by using report forms and drawing functions.
2. The coastal zone pollution early warning system of claim 1, wherein the controller unit adopts a 32-bit low-power-consumption embedded central processor chip ARM9 series S3C2410 processor of Samsung, the processor can operate at 203MHz at most, the hardware resources integrated in the processor are rich, the expandability of peripheral circuits is very good, and the core processor is provided with an ADC part, so that the core processor can be conveniently accessed to various sensors to acquire analog signals.
3. The coastal zone pollution early warning system of claim 1, wherein the GPS positioning module adopts a GPS receiving chip U-BLOX-6010 with a minimum size from U-BLOX corporation.
4. The coastal zone pollution early warning system of claim 1, wherein the Zigbee module is a CC2430 chip of TI corporation, and the CC2430 includes an RF transceiver, and further integrates an enhanced 8051MCU, a FLASH memory of 32/64/125kB, a TAM and ADC of 8kB, a DMA, a doorway, and the like, and operates in a 2.4GHz band.
5. The coastal zone pollution early warning system of claim 1, wherein the sensor unit is connected with a PH, turbidity and temperature sensor through an A/D conversion interface, and the sensor outputs a 4-20mA standard current signal.
6. The coastal zone pollution early warning system of claim 1, wherein the power module is powered by solar energy and a storage battery, the total power consumption of the system is about 1.2W, the capacity of the storage battery is 10000mah x 5v =50000mwh, and the maximum output of the solar panel is 6W.
7. The coastal zone pollution early warning system of claim 1, wherein the data aggregation terminal is consistent in composition with the sensor node, compared with the sensor node, a GPRS/4G communication module is added, and the GPRS module is a GSM/GPRS dual-frequency SIM900 wireless module introduced by SIMCom.
8. The coastal zone pollution early warning system of claim 7, wherein the data gathering terminal is additionally connected with other support modules, which comprise an SD external storage module, a FLASH expansion module, a clock circuit and an LCD display module.
9. The coastal zone pollution early warning system of claim 1, wherein the data acquisition terminal is a marine monitoring device floating on the surface of the sea for observing surface sea currents, surface water temperature and salinity environmental factors, and has excellent air tightness in structure, and the key components of the power supply and the control circuit are fully ensured to be isolated from the sea water.
10. The coastal zone pollution early warning system according to claim 1, characterized in that a columnar annular permanent magnet of the data acquisition terminal is sleeved on a smooth Teflon shaft as a vibrator of a generator, disc-shaped permanent magnets are fixed at two ends of the columnar annular permanent magnet, the vibrator of the annular permanent magnet is suspended by magnetic thrust generated by repulsion of like poles, the vibrator is arranged in a cylinder wound with a winding coil, a gap as small as possible is kept between the vibrator and the cylinder, and the winding coil is tightly attached to the soft iron core cylinder.
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| CN114527253A (en) * | 2022-03-02 | 2022-05-24 | 山东省水利科学研究院 | Seawater intrusion layered monitoring device and method |
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