CN101840627A - Wireless sensor network control device based on water quality monitoring - Google Patents
Wireless sensor network control device based on water quality monitoring Download PDFInfo
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- CN101840627A CN101840627A CN 201010167845 CN201010167845A CN101840627A CN 101840627 A CN101840627 A CN 101840627A CN 201010167845 CN201010167845 CN 201010167845 CN 201010167845 A CN201010167845 A CN 201010167845A CN 101840627 A CN101840627 A CN 101840627A
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Abstract
The invention relates to a wireless sensor network control device based on water quality monitoring, which comprises a micro-control unit, a filter and noise reduction unit, a signal amplification unit, an analog-to-digital conversion unit, a power supply interface control unit, a power supply interface monitoring unit, a clock unit and a data interface unit. The micro-control unit obtains the current real-time time information and judges whether sampling is conducted or not according to the time information, the sampled data is transmitted to the micro-control unit through the filter and noise reduction unit, the signal amplification unit and the analog-to-digital conversion unit or through a data interface unit, and according the needs of situations, the data can be transmitted to the interface requiring the data after the data is processed by the micro-control unit. The invention has the advantages of real-time data, rich interface resources, multiple connectable sensors, strong anti-interference capability, high reliability, long working time and the like.
Description
Technical field
The present invention relates to the water quality monitoring detection range, particularly relate to a kind of wireless sensor network control device based on water quality monitoring.
Background technology
Water is the most ubiquitous material of nature, also is human survival, commercial production, the indispensable element of agricultural planting; In recent years, the water contamination accident took place in Taihu Lake, Wuxi blue algae bloom, basin, Song Hua River, Chifeng, Yancheng, Jiangsu successively, had brought very big loss for human health and national economy; Monitoring and management to water quality also are very important in productive life.But still do not have a kind of very perfect control device can ideally control water quality sensor at present and realize online water quality monitoring and management.
Summary of the invention
Technical matters to be solved by this invention provides a kind of wireless sensor network control device based on water quality monitoring, can control water quality sensor real-time online ground water quality is monitored and managed.
The technical solution adopted for the present invention to solve the technical problems is: a kind of wireless sensor network control device based on water quality monitoring is provided, comprise micro-control unit, filtering noise reduction unit, signal amplification unit, AD conversion unit, power interface control module, clock unit and data interface unit, the input end of described filtering noise reduction unit is connected with the simulating signal of water quality sensor, and output terminal links to each other with AD conversion unit with described signal amplification unit successively; Described filtering noise reduction unit is used to remove the noise of simulating signal; Described signal amplification unit is used for the simulating signal of removing noise is amplified; The analog signal conversion that described AD conversion unit is used for amplifying is a digital signal; Described micro-control unit links to each other with data interface unit with described AD conversion unit, power interface control module, clock unit respectively, is used to control the The whole control device; Described power interface control module is used to control the power supply of water quality sensor; Described clock unit is used to read real-time time; Described data interface unit is used for water quality sensor is sent order, reads the data that water quality sensor collects and sends the data that water quality sensor collects.
The clock unit of described wireless sensor network control device based on water quality monitoring reads real-time time by its inner GPS module; The time precision of described GPS module is a Millisecond.
Isolation with the power supply ground and the data ground of external equipment is realized by its inner power isolation module, optocoupler module and interface physical isolation module in the micro-control unit of described wireless sensor network control device based on water quality monitoring.
The data interface unit of described wireless sensor network control device based on water quality monitoring reads the data that water quality sensor collects in real time by the realization that links to each other with water quality sensor of RS232 digital interface; Described data interface unit is by being connected the data that realize that the wireless transmission water quality sensor collects with external radio-frequency module.
The micro-control unit of described wireless sensor network control device based on water quality monitoring periodically control data interface unit sends the order of image data to water quality sensor.
Described wireless sensor network control device based on water quality monitoring also comprises the power interface monitoring means that links to each other with described micro-control unit, is used to monitor the voltage at described power interface control module place.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the present invention compared with prior art, have following advantage and good effect: the present invention not only can read the data of water quality sensor in real time by data interface unit, can also read the data of water quality sensor in real time by analog to digital conversion (being called for short " A/D conversion ") interface, applicable to the different sensors that has distinct interface, make implementation flexible.When the signal that the reception water quality sensor transmits, remove the noise signal that water quality sensor is exported by the filtering noise reduction unit, reduce the influence that external interference is brought, make sensor always work in the high sensitivity state, improved signal to noise ratio (S/N ratio).Adopt the power interface control module to stop the water quality sensor power supply is reduced the power consumption of system when water quality monitored not needing; When water quality was monitored, the power interface monitoring means was monitored the voltage condition of power interface in real time, had improved the reliability of whole device.Employing source isolation module, optocoupler module and the physically-isolated technology of interface are isolated the power supply ground of micro-control unit and the power supply ground and the data ground of external equipment, have increased the reliability of The whole control device, avoid the interference of external equipment to control device.
In sum, the present invention have data in real time, interface resource abundant, can connect a plurality of sensors, advantage such as antijamming capability is strong, reliability is high, and the working time is long.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is a workflow diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiments of the present invention relate to a kind of wireless sensor network control device based on water quality monitoring, by processing to the water quality sensor output signal, adopt corresponding calculation method, obtain the major parameter in the water quality in real time, as chlorophyll, oxygen dissolving value, pH value etc., and the data that collect are sent to the charge center by the communication mode of wireless transmission.As shown in Figure 1, this control device comprises micro-control unit, filtering noise reduction unit, signal amplification unit, A/D converting unit, power interface control module, clock unit and data interface unit, the input end of described filtering noise reduction unit is connected with the simulating signal of water quality sensor, and output terminal links to each other with described signal amplification unit A/D number conversion unit successively; Described filtering noise reduction unit is used to remove the noise of simulating signal, improves signal to noise ratio (S/N ratio), prevents distorted signals, has reduced the influence that external interference is brought, and makes sensor always work in the high sensitivity state, has improved reliability; Described signal amplification unit is used for the simulating signal of removing noise is amplified, and its enlargement factor can be regulated according to actual operating position; The analog signal conversion that described A/D converting unit is used for having amplified is a digital signal; Described micro-control unit links to each other with data interface unit with described A/D converting unit, power interface control module, clock unit respectively as the core of The whole control device, is used to control the The whole control device; Described power interface control module is used to control the power supply of water quality sensor, guarantee only when needs are sampled to water quality, just water quality sensor to be powered, water quality sensor is not powered when water quality sampled not needing, so reduced the power consumption of The whole control device, improve the flying power of system, prolonged serviceable life; Described clock unit is used to read to get the time in real time, and this real-time time is used for the control reference of sensor sample time and the timing reference of whole device; Described data interface unit is used for water quality sensor is sent order, reads the data that water quality sensor collects and sends the data that water quality sensor collects, be data interface unit by with the interaction protocol of external water quality sensor, in the control water quality sensor sampling period, read the data that water quality sensor collects; Data interface unit also provides the support to external transmission equipment, can send to the charge center by the data that data interface unit collects water quality sensor.
The clock unit of described wireless sensor network control device based on water quality monitoring can read accurate real-time time from satellite by the GPS module of the portion of setting within it; Described GPS module can be by micro-control unit controls and configuration, and the I of its time precision is made as Millisecond.
Isolation with the power supply ground and the data ground of external equipment is realized by its inner power isolation module, optocoupler module and interface physical isolation module in the micro-control unit of described wireless sensor network control device based on water quality monitoring, can increase the reliability of control device, avoid the interference of external equipment control device.
The data interface unit of described wireless sensor network control device based on water quality monitoring reads the data that water quality sensor collects in real time by the realization that links to each other with water quality sensor of RS232 digital interface; Described data interface unit is by being connected the data that realize that the wireless transmission water quality sensor collects with external radio-frequency module.This control device both can obtain the data of digital signal water quality sensor, can obtain the data of simulating signal water quality sensor again, can connect the water quality sensor of distinct interface according to different user's requests, and implementation is quite flexible.
The micro-control unit of described wireless sensor network control device based on water quality monitoring periodically control data interface unit sends the order of image data to water quality sensor, thereby the real-time report that has realized the cycle data that will collect is given the charge center, makes the charge center to analyze and to handle the data that collect easily.
Described wireless sensor network control device based on water quality monitoring also comprises the power interface monitoring means that links to each other with described micro-control unit, be used to monitor the voltage condition at described power interface control module place, by monitoring, guarantee each realization to the control of water quality sensor power interface, in case power interface breaks down, can improve the reliability of whole device by power interface monitoring means notice micro-control unit.
The present invention can be installed in the control box that is used for water monitoring data, and applicability is very strong, and the gps antenna that is used for time for reading can be fixed on the no occlusion area of control box outside, conveniently obtains satellite-signal.
Be describing of how working to the present invention below, its step as shown in Figure 2.
At first, data are carried out initialization, promptly time of data collection, cycle etc. are set.Then, GPS module in the micro-control unit controls clock unit reads real-time time, judged whether to arrive the sampling time (being data acquisition time) of water quality sensor, if do not arrive data acquisition time, the The whole control device enters dormant state, and wake up at a fixed time, again allow the GPS module read real-time time, otherwise, then by micro-control unit controls power interface control module opening power interface, be the water quality sensor power supply, and the control data interface unit sends the order of image data to water quality sensor.Then, obtain the data that water quality sensor collects by data interface unit or A/D converting unit, after receiving the data that water quality sensor collects, data interface unit sends to the charge center by the data that coupled external transmission equipment collects water quality sensor.After finishing the data transmission, allow the GPS module read real-time time again, judged whether the sampling time next time.
Be not difficult to find, the present invention not only can read the data of water quality sensor in real time by data interface unit, can also read the data of water quality sensor by the A/D translation interface in real time,, make implementation flexible applicable to the different sensors that has distinct interface.When the signal that the reception water quality sensor transmits, remove the noise signal that water quality sensor is exported by the filtering noise reduction unit, reduce the influence that external interference is brought, make sensor always work in the high sensitivity state, improved signal to noise ratio (S/N ratio).Adopt the power interface control module to stop the water quality sensor power supply is reduced the power consumption of system when water quality monitored not needing; When water quality was monitored, the power interface monitoring means was monitored the voltage condition of power interface in real time, had improved the reliability of whole device.Employing source isolation module, optocoupler module and the physically-isolated technology of interface are isolated the power supply ground of micro-control unit and the power supply ground and the data ground of external equipment, have increased the reliability of The whole control device, avoid the interference of external equipment to control device.
Claims (6)
1. wireless sensor network control device based on water quality monitoring, comprise micro-control unit, filtering noise reduction unit, signal amplification unit, AD conversion unit, power interface control module, clock unit and data interface unit, it is characterized in that, the input end of described filtering noise reduction unit is connected with the simulating signal of water quality sensor, and output terminal links to each other with AD conversion unit with described signal amplification unit successively; Described filtering noise reduction unit is used to remove the noise of simulating signal; Described signal amplification unit is used for the simulating signal of removing noise is amplified; The analog signal conversion that described AD conversion unit is used for amplifying is a digital signal; Described micro-control unit links to each other with data interface unit with described AD conversion unit, power interface control module, clock unit respectively, is used to control the The whole control device; Described power interface control module is used to control the power supply of water quality sensor; Described clock unit is used to read real-time time; Described data interface unit is used for water quality sensor is sent order, reads the data that water quality sensor collects and sends the data that water quality sensor collects.
2. the wireless sensor network control device based on water quality monitoring according to claim 1 is characterized in that, described clock unit reads real-time time by its inner GPS module; The time precision of described GPS module is a Millisecond.
3. the wireless sensor network control device based on water quality monitoring according to claim 1, it is characterized in that described micro-control unit is realized by its inner power isolation module, optocoupler module and interface physical isolation module and the power supply ground of external equipment and the isolation on data ground.
4. the wireless sensor network control device based on water quality monitoring according to claim 1 is characterized in that, described data interface unit reads the data that water quality sensor collects in real time by the realization that links to each other with water quality sensor of RS232 digital interface; Described data interface unit is by being connected the data that realize that the wireless transmission water quality sensor collects with external radio-frequency module.
5. the wireless sensor network control device based on water quality monitoring according to claim 1 is characterized in that, described micro-control unit periodically control data interface unit sends the order of image data to water quality sensor.
6. according to the described wireless sensor network control device of arbitrary claim among the claim 1-5 based on water quality monitoring, it is characterized in that, described wireless sensor network control device also comprises the power interface monitoring means that links to each other with described micro-control unit, is used to monitor the voltage at described power interface control module place.
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| CN101241646A (en) * | 2007-08-08 | 2008-08-13 | 中科院嘉兴中心微系统所分中心 | Wireless sensor network device for measuring car throughput based on high magnetic resistance and magnetic sensitive technology and its realizing method |
| CN101281187A (en) * | 2008-04-08 | 2008-10-08 | 杭州电子科技大学 | Water environment monitoring node based on ZigBee wireless technique |
| CN101696967A (en) * | 2009-10-29 | 2010-04-21 | 中国科学院上海微系统与信息技术研究所 | Lake water texture and water quality monitoring system and method based on wireless sensing network |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241646A (en) * | 2007-08-08 | 2008-08-13 | 中科院嘉兴中心微系统所分中心 | Wireless sensor network device for measuring car throughput based on high magnetic resistance and magnetic sensitive technology and its realizing method |
| CN101281187A (en) * | 2008-04-08 | 2008-10-08 | 杭州电子科技大学 | Water environment monitoring node based on ZigBee wireless technique |
| CN101696967A (en) * | 2009-10-29 | 2010-04-21 | 中国科学院上海微系统与信息技术研究所 | Lake water texture and water quality monitoring system and method based on wireless sensing network |
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Open date: 20100922 |