CN109115270A - A kind of data collection process method of multi-parameter water quality data parallel acquisition system - Google Patents
A kind of data collection process method of multi-parameter water quality data parallel acquisition system Download PDFInfo
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Abstract
A kind of data collection process method of multi-parameter water quality data parallel acquisition system belongs to water quality monitoring survey technology field, which is based on sensor module and handheld terminal is realized, is communicated between the two using RS485, realizes the transmission of digital signal.Data collection module, data processing module in handheld terminal, which are exercised supervision and pre-processed to the water quality data being collected into, guarantees that collected data are effectively usable, the collected data of data disaply moudle real-time display, data memory module stores collected water quality data and relevant information, data inquiry module and Drawing of Curve module can assist scientific research personnel to be analyzed and processed collected data, improve subsequent data analysis efficiency.The present invention can be improved the validity and accuracy of water quality data collected, enhance the stability and robustness of system, while can directly be analyzed and processed to water quality data, reduce the later period to the cost of Data Management Analysis.
Description
Technical field
The invention belongs to water quality monitoring survey technology fields, are related to a kind of number of multi-parameter water quality data parallel acquisition system
According to collection processing method.
Background technique
Water is basic natural resources and strategic economic resources, is the resistance to fundamental depended on for existence of the mankind and society
It can be with the basic guarantee of economic development.It is overdeveloped in pollution discharge beyond standards and water resource with social economy's fast development
Under dual-pressure, China's water environment pollution problem is more highlighted, and administrative departments at different levels and broad masses are to protection of the water environment
Pay attention to day by day.Understanding and grasping water environment state is the important foundation and primary condition that protection of the water environment is carried out.Therefore, such as
What can comprehensive and accurate understanding water environment state, have become the critical issue of water resources management and water environment protection.
Water quality monitoring is to grasp and monitor water quality condition, understands the important means of water environment situation.The routine of water quality monitoring
Data mainly include the indexs such as temperature, depth, dissolved oxygen, Ph, conductivity, oxidation-reduction potential, turbidity.With electronic information skill
The development of art and water quality sensor technology it is improved day by day, by the conventional water quality parameter in situ measurement of water quality sensor start by
Gradually replace the measurement method of traditional artificial sample and Laboratory Monitoring.Monitoring personnel transfers multi-parameter water quality detecting instrument real
The in situ of existing water quality parameter obtains, but there are still maintenance difficult, upgradings to change for the application of multi-parameter water quality detecting instrument at this stage
For it is at high cost and excessively rely on single-sensor the deficiencies of.For example, xylem company of Germany YSI EXO2 multi-parameter water quality monitor
The water quality datas such as water depth, temperature, pH value, dissolved oxygen, conductivity, oxidation-reduction potential, turbidity can be measured, use one
Series technique improve sensor accuracy while realize fault detection, when instrument can not work normally can and alarm.
But the acquisition of its water quality data is completely dependent on single water quality sensor, not can guarantee the accuracy of single-sensor data first,
It certainly exists certain systematic error, once secondly single-sensor damage will cause equipment not to be available, equipment robust
Property is low.
Meanwhile data collection corresponding to existing water monitoring device and processing method are also relatively simple and fall behind, it is past
Toward not can avoid the signal interferences such as some pulses electronically, the accuracy for the data that water quality monitoring is arrived, nothing just not can guarantee yet
Method efficiently obtains effective water quality data.The corresponding data collection of existing water monitoring device and processing method can not also be handled
The collaborative work problem of multiple sensors under same water quality parameter, so that the robustness of system is not high.And after obtaining data,
Matched water monitoring device does not often have the ability for directly handling these data.
Obviously, existing water quality monitoring equipment water quality data collection processing method corresponding with its can not be obtained efficiently and accurately
It takes and handles effective water quality data.Therefore, be badly in need of it is a kind of can be with the water quality monitoring equipment energy that has multiple sensors under same parameters
It is matching used, the multi-parameter water quality data collection process method of effective water quality data can be obtained with efficiently and accurately.
Summary of the invention
The present invention specifically addresses deficiency existing for existing water monitoring data collection processing method, hardware relies on insertion
Formula handheld terminal, by using the methods of data acquisition process, data store query, providing one kind can accurately and efficiently be obtained
Water quality data and the multi-parameter water quality data collection process method that can directly handle it analysis.
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of data collection process method of multi-parameter water quality data parallel acquisition system, the data processing method are based on passing
Sensor module and handheld terminal are realized, are communicated between the two using RS485, realize the transmission of digital signal.
The sensor module uses modularized design, the sensing of mountable multiple type measurement different quality parameters
Device, the number of sensors for being mounted on each type in sensor module is indefinite, and mountable one also mountable multiple, and senses
The type and quantity of device can all be replaced at any time, only need to remove water quality sensor from main body rack, and disconnect and connect and is corresponding
Cable connection unit, it is easy to operate.When there is more than two sensors under sensor module same parameters, hand
Holding terminal concurrently can acquire and handle the water quality data information of two or more identical parameters sensors, will not be more because existing
The sensor of a identical parameters and cause handheld terminal situations such as contradictory occur in acquisition and when water quality treatment data information.
The handheld terminal includes data collection module, data processing module, data disaply moudle, data storage mould
Block, data inquiry module and Drawing of Curve module.Handheld terminal is attached and is led to sensor module by RS485 mode
Letter, completes sending and receiving for digital signal, to get corresponding water quality data.Data in the handheld terminal are received
Collection module, data processing module, which are exercised supervision and pre-processed to the water quality data being collected into, guarantees that collected data effectively may be used
With, collected data of data disaply moudle real-time display, data memory module is by collected water quality data and relevant information
It being stored, data inquiry module and Drawing of Curve module can assist scientific research personnel to be analyzed and processed collected data,
Improve subsequent data analysis efficiency.
The data collection module acquisition samples obtained water quality data every time and carries out at corresponding filtering to them
Reason.Within the unitary sampling moment continuous acquisition multi-group data carry out median average filter, then with upper sampling instant data pair
Than carrying out limit filtration, data of problems are labeled.Median average filter is it is possible to prevente effectively from because signal fluctuation is made
At data inaccuracy problem, limit filtration then may determine that whether data reasonable.Specifically:
Firstly, data collection module can continuously acquire multiple groups water quality data X1 in some water quality parameter unitary sampling
~Xn, in this n group data, data collection module can reject maximum value Xmax and minimum value Xmin therein, then to remaining
N-2 group data are averaged, and obtained value is the water quality parameter value after median average filter, will be put down by median
Filtered water quality parameter is deposited in the database as end value.For single water quality parameter, there are the feelings of multiple sensors
Condition, data collection module carry out storage and subsequent place after carrying out median average filter to each single sensor again
Reason.Later, the water quality parameter after median average filter is passed through median with a upper sampling instant by data collection module
Water quality parameter after average filter, which is compared, completes limit filtration: if beyond the corresponding water quality parameter numerical value of a upper sampling instant
10%, then it is assumed that, there are pulse or other interference, deviation is larger, is restored again into database after being labeled, so as to subsequent place for it
Reason.In this process, it when sampling starts, needs first to stand sensor module initial samples position in water and remains stationary 15 seconds
Left and right, continuous acquisition 3n group data, wherein after every n group data first pass around median average filter, then to 3 groups of obtained processes
Data of the data averaged as first sampling instant after median average filter, thus when guaranteeing first sampling
The correctness for carving data prevents the data of incorrect first sampling instant from causing subsequent not carrying out correct clipping filter
Wave.Meanwhile the limit filtration in data collection module can also be used for the monitoring sensitive data short time or certain vertical apart from interior change
Change biggish process, grabs crucial water quality data change information.Collection module can largely solve electromagnetic interference and bring
Numerical error, can also to a certain degree Shangdi solve systematic error brought by water quality data it is inaccurate the problems such as.
The co-ordination problem of multisensor under the data processing module processing same parameters.The data processing
Modular concurrent handles the coordination that there are multiple sensors under single water quality parameter, storage and alarm, by seeking sense more
Device average, willIt is compared with sensor nominal accuracy to judge whether sensor works in normal state,
Problematic sensor alarm and mark its numerical value, and does not use the sensor and carries out seeking for average value.
Whether data processing module 2-2 can make whole system normal to the working condition of each sensor, and whether measurement data is quasi-
It is really assessed in real time, has well solved the problem of operative sensor goes wrong with multisensor co-ordination.This method
Under two o'clock is essentially consisted in using the purpose of multiple sensors to single water quality parameter: first is that reducing sensor itself as far as possible and being
Error of uniting avoids single-sensor non-normal working bring water quality parameter from measuring inaccurate institute second is that enhancing system robustness
Caused by acquisition data invalid the problem of, the relationship of multiple sensors under single parameter can be coordinated using data processing module.
Specifically:
When under a parameter using single or two sensors, data processing module is disregarded.
When having multiple sensors under a parameter, for multiple sensor monitoring data value x of same water quality parameter1~
xn, using data processing module to their averagedsFormula is used laterMeter
A numerical value of each sensor is calculated, wherein DiFor the range ability of each sensor.The numerical value X that this is calculatediWith
The nominal precision P of corresponding sensor itselfiIt compares: if the XiGreater than Pi, then it is assumed that there is measurement accuracy in sensor,
It needs to overhaul, at this moment the numerical value of sensor measurement of problems will not be used further to calculate average value, but its numerical value can still be deposited
In the database, they can especially be marked for storage, for using when subsequent processing and maintenance, while prompt can be provided on interface
Corresponding sensor is overhauled；Conversely, if XiLess than Pi, then working sensor is normal.Multiple sensors of single parameter
Use greatly strengthen the accuracy and reliability of water quality data monitoring, and data processing module then ensure that multiple sensors
Normal and accurate operation, coordinated the relationship of multiple sensors.
The data disaply moudle is mainly responsible for time, geographical location information, collected water quality data, sensor
Module lowering velocity information is shown on the screen interface of handheld terminal.In order to guarantee the clean and tidy row at interface and showing for critical data
Work property, in the case where the water quality data that main interface is shown only shows each water quality parameter, multiple sensing datas obtain after treatment
Average value, after clicking these average values, interface can show each sensing utensil under the corresponding water quality parameter of the average value
The monitor value of body and their warning message.If configurable deep sensor in sensor module, meeting on data disaply moudle
Show the current lowering velocity of sensor module.Pass through formulaThe decentralization of current sensor module can be calculated
Speed, wherein DkFor the depth value that current sample time pressure sensor returns, Dk-1For upper sampling instant pressure sensor
The depth value of return, Δ tkFor the time interval at two neighbouring sample moment.
By collected and treated, water quality parameter data save the data memory module.Data store mould
Block relies on Embedded Handhold Terminal presence, uses SQLite database, this is a light-weight database, is adapted to well
In embedded.The main storing data collection module of data memory module is each after median average filter and limit filtration
What multiple sensors were calculated in the parameters being calculated in the water quality data of a sensor, data processing module is averaged
The warning message and corresponding report occurred in corresponding geography, temporal information and modules when being worth, acquiring these data
Alert data.Data memory module has recorded the problem of finding in the data and collection process that water quality data acquires well, after being
The improvement of continuous water quality acquisition system provides basis and the condition of analysis.
The data inquiry module is mainly responsible for the water quality data of the parameters stored in reading database.Data
The sampling time for the water quality data that enquiry module can be checked as needed and sampling position information are screened, when in handheld terminal
On choose the place of the water quality data to be checked and after the time, data inquiry module can be from the SQLite of Embedded Handhold Terminal
Corresponding water quality data is read in database and is shown on the screen of handheld terminal.
The Drawing of Curve module is mainly responsible for the water quality data that will be kept and is drawn by certain format and method
Continuous curve is made.After choosing the place for needing the data drawn and temporal information in data inquiry module, selection is needed
The transverse and longitudinal axis for drawing curve is any parameter respectively, is drawn later, and the curve drawn out is consecutive variations.Pass through song
Line drafting module, researcher can be convenient fast and directly to the variation tendency of water quality data and different quality data parameters
Incidence relation studied, greatly reduce the later period to the cost of data processing.
The data collection process method the following steps are included:
Step 1: assembly and connection sensor module 1 and handheld terminal 2.It drives sampling boat and goes to the place that needs sample, and
Current geographic position information shown by data disaply moudle 2-3 in handheld terminal 2 is observed, guarantees present sample ship geographical location
Sampling position demand needed for information meets.
Step 2: decentralization sensor module 1.In some sampling instant, the data collection module 2-1 in handheld terminal 2 exists
Multiple groups water quality data is continuously read in the unitary sampling moment, after carrying out the processing of median average filter, with a period of time upper in database
The water quality data at quarter compares, and carries out limit filtration processing, if being more than limit filtration requirement, is labeled to this group of data.
Step 3: the multiple sensor numbers of data processing module 2-2 in handheld terminal 2 to identical parameters in this group of data
According to being handled, the average of multiple sensor water quality parameter numerical value is sought, then passes through formulaWith each sensing
Device nominal accuracy compares.IfGreater than sensor nominal accuracy, then alarm is carried out to the sensor and to it
Data are labeled, and do not use the calculating that its numerical value carries out average value.Data processing module 2-2 can be to whole system pair
Whether the working condition of each sensor is normal, and whether measurement data is accurately assessed in real time, solves operative sensor and occurs
The problem of problem and multisensor co-ordination.
Step 4: data disaply moudle 2-3 shows the data after handling well on the screen of handheld terminal 2, while data
All water quality datas and corresponding time, geography information and all warning messages are stored in hand-held whole by memory module 2-4
In the database at end 2.
Step 5: recycling sensor module 1 completes this sampling.
Step 6: after the completion of sampling, being checked, gone forward side by side using the multi-parameter water quality data that 2 pairs of handheld terminal acquisitions are completed
The trend curve of row historical data is drawn.
6.1) data inquiry module 2-5 extracts the sampling time of data as needed and sampling position carries out historical data
It checks.
6.2) Drawing of Curve module 2-6 directly carries out historical data according to analysis demand, the transverse and longitudinal coordinate of trade-off curve
The drafting of trend curve, and observed and analyzed.
Benefit of the invention is with advantage: median average filter and limit filtration are used when acquisition water quality data, it is high
Effect ground acquires effective water quality data；Efficient parallel place is carried out using multiple sensors under single parameter and to these sensor values
Reason and alarm before guaranteeing that the coordination of these sensors is accurately run in advance reduce systematic error to water quality data bring
It influences, enhances the robustness of system；Tool data show, store, checking, curve drafting function, improve data processing
Efficiency reduces the cost of subsequent required data processing and analysis.
Detailed description of the invention
Fig. 1 is system overall schematic.
Fig. 2 is each modular structure schematic diagram of handheld terminal.
Fig. 3 is water quality data monitoring flow chart.
Fig. 4 is the inquiry of historical data and Drawing of Curve flow chart.
In figure: 1 sensor module；2 handheld terminals；2-1 data collection module；2-2 data processing module；2-3 data are aobvious
Show module；2-4 data memory module；2-5 data inquiry module；2-6 Drawing of Curve module.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution and attached drawing.
Sampling boat is driven, cooperates sensor module 1 and handheld terminal 2 using the water quality data collection processing method to more ginsengs
Number water quality data is acquired.
Step 1: assembly and connection sensor module 1 and handheld terminal 2.It drives sampling boat and goes to the place that needs sample, see
Current geographic position information shown by data disaply moudle 2-3 in handheld terminal 2 is examined, with the geographical location for needing sampling position
Information is compared, adjustment sampling ship position, the sampling position demand needed for present sample ship geographical location information meets.
Step 2: decentralization sensor module 1.In some sampling instant, the data collection module 2-1 in handheld terminal 2 connects
It resumes studies and takes multiple groups water quality data, carry out the processing of median average filter.
Step 3: current sample time is passed through median average filter by the data collection module 2-1 in handheld terminal 2
The water quality data of the last moment saved in the water quality data and database of processing compares, and carries out limit filtration processing, if super
The requirement of limit filtration clipping is crossed, then this group of data are labeled.
Step 3: the multiple sensor numbers of data processing module 2-2 in handheld terminal 2 to identical parameters in this group of data
According to being handled, the average of multiple sensor water quality parameter numerical value is sought, then passes through formulaWith each sensing
Device nominal accuracy compares.IfGreater than sensor nominal accuracy, then alarm is carried out to the sensor and to it
Data are labeled, and do not use the calculating that its numerical value carries out average value.
Step 4: data disaply moudle 2-3 shows the data after handling well on the screen of handheld terminal 2, while data
All water quality datas and corresponding time, geography information and all warning messages are stored in hand-held whole by memory module 2-4
In the database at end 2.
Step 5: recycling sensor module 1 completes this sampling.
Step 6: after the completion of sampling, being checked, gone forward side by side using the multi-parameter water quality data that 2 pairs of handheld terminal acquisitions are completed
The trend curve of row historical data is drawn.
6.1) the data inquiry module 2-5 of handheld terminal 2, the sampling time for the data that selection needs to inquire and sampling are used
Location information check.
6.2) drafting for if desired carrying out historical text then uses the Drawing of Curve module 2-6 of handheld terminal 2, quasi-
The historical data in the sampling time and sampling position checked before standby use is drawn.
6.3) selection needs to draw cross, the ordinate information of curve, completes the observation for drawing and carrying out curvilinear trend and divides
Analysis.
Data collection module in handheld terminal can carry out the processing of median average filter and limit filtration to water quality data
Processing reduces the influence of systematic error and electronic impulse error to water quality data.Data processing module can be coordinated under same parameters
The cooperation relation of multiple sensors, the water quality data information of multiple sensors under parallel processing same parameters, and real-time monitoring passes
Sensor operating status enhances system robustness to the sensor and alarm for monitoring numerical value inaccuracy occur.Data disaply moudle
The water quality data handled well and its corresponding temporal information and geography information can be shown, and sensor module can worked as
Preceding lowering velocity is shown that assist operators carry out operation.Data memory module can to collected water quality data and its
Corresponding time and geography information are stored, and are stored to the warning message occurred in the process, and subsequent analysis is facilitated to grind
Study carefully.Data inquiry module can inquire collected historical data, and fitting curves drafting module can be directly to collecting
Water quality data carry out parameters trend curve drafting, greatly reduce the later period to the cost of Data Management Analysis, side
Just quick.
Embodiment described above only expresses embodiments of the present invention, and but it cannot be understood as to the invention patent
Range limitation, it is noted that for those skilled in the art, without departing from the inventive concept of the premise, also
Several modifications and improvements can be made, these are all belonged to the scope of protection of the present invention.
Claims (2)
1. a kind of data collection process method of multi-parameter water quality data parallel acquisition system, which is characterized in that the data processing
Method is based on sensor module (1) and handheld terminal (2) is realized, handheld terminal (2) passes through RS485 mode and sensor module
(1) it is attached and communicates, complete sending and receiving for digital signal, obtain corresponding water quality data；The sensor die
Block (1) uses modularized design, mountable a variety of for measuring the sensor of different quality parameter, the sensor number of each type
Amount determines as needed；When there is more than two sensors under sensor module same parameters, handheld terminal (2) can be parallel
Ground acquires and handles the water quality data information of two or more identical parameters sensors；
The handheld terminal (2) includes data collection module (2-1), data processing module (2-2), data disaply moudle (2-
3), data memory module (2-4), data inquiry module (2-5), Drawing of Curve module (2-6), the data in handheld terminal (2)
It is collected that collection module (2-1), data processing module (2-2) exercise supervision and pre-process guarantee to the water quality data being collected into
Data are effectively usable, and the collected data of data disaply moudle (2-3) real-time display, data memory module (2-4) will collect
Water quality data and relevant information stored, data inquiry module (2-5) and Drawing of Curve module (2-6) can assist scientific research people
Member is analyzed and processed collected data, improves subsequent data analysis efficiency；
The data collection process method the following steps are included:
Step 1: assembly and connection sensor module (1) and handheld terminal (2)；It drives sampling boat and goes to the place that needs sample, and
Current geographic position information shown by data disaply moudle 2-3 in handheld terminal (2) is observed, guarantees present sample ship geography position
Sampling position demand needed for confidence breath meets；
Step 2: decentralization sensor module (1)；Data collection module (2-1) in some sampling instant, in handheld terminal (2)
Multiple groups water quality data is continuously read within the unitary sampling moment, after carrying out the processing of median average filter, in database upper one
The water quality data at moment compares, and carries out limit filtration processing, if being more than limit filtration requirement, marks to this group of data
Note；
Step 3: the multiple sensor numbers of data processing module (2-2) in handheld terminal (2) to identical parameters in this group of data
According to being handled, the average of multiple sensor water quality parameter numerical value is sought, then passes through formulaWith each sensing
Device nominal accuracy compares；IfGreater than sensor nominal accuracy, then alarm is carried out to the sensor and to it
Data are labeled, and do not use the calculating that its numerical value carries out average value；Data processing module (2-2) can be to whole system
Whether normal to the working condition of each sensor, whether measurement data is accurately assessed in real time, solves operative sensor and goes out
The problem of existing problem and multisensor co-ordination；
Step 4: data disaply moudle (2-3) shows the data after handling well on the screen of handheld terminal (2), while data
All water quality datas and corresponding time, geography information and all warning messages are stored in hand-held by memory module (2-4)
In the database of terminal (2)；
Step 5: this sampling is completed in recycling sensor module (1)；
Step 6: after the completion of sampling, being checked using the multi-parameter water quality data that handheld terminal (2) completes acquisition, and carry out
The trend curve of historical data is drawn；
6.1) data inquiry module (2-5) extracts the sampling time of data as needed and historical data is looked into sampling position
It sees；
6.2) Drawing of Curve module (2-6) directly becomes to historical data according to analysis demand, the transverse and longitudinal coordinate of trade-off curve
The drafting of power curve, and observed and analyzed.
2. a kind of data collection process method of multi-parameter water quality data parallel acquisition system according to claim 1,
It is characterized in that, median average filter processing method in described step 2 are as follows:
In to some water quality parameter unitary sampling, data collection module (2-1) continuously acquires multiple groups water quality data X1~Xn, in n
In group data, maximum value X is rejectedmaxWith minimum value Xmin, then remaining n-2 group data are averaged, obtained value is to pass through
Water quality parameter value after median average filter is saved using this value as end value；Single water quality parameter is deposited
Multiple sensors the case where, after data collection module (2-1) carries out median average filter to each single sensor
Storage and subsequent processing are carried out again.
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| CN109828094A (en) * | 2019-04-04 | 2019-05-31 | 大连理工大学 | A kind of data collection process method of multilayer multi-parameter water quality data parallel monitoring system |
| DE202022101095U1 (en) | 2022-02-25 | 2022-03-16 | Shazia ALI | Intelligent integrated monitoring system for measuring water quality based on IoT sensors |
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