CN108204848A - A kind of water level and run-off Data collection and precessing system and method - Google Patents

A kind of water level and run-off Data collection and precessing system and method Download PDF

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Publication number
CN108204848A
CN108204848A CN201711395658.7A CN201711395658A CN108204848A CN 108204848 A CN108204848 A CN 108204848A CN 201711395658 A CN201711395658 A CN 201711395658A CN 108204848 A CN108204848 A CN 108204848A
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China
Prior art keywords
data
run
water
water level
sensor
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Inventor
殷刚
吕光辉
师庆东
何学敏
李诚志
张雪妮
李岩
周小龙
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Xinjiang University
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Xinjiang University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/66Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by measuring frequency, phaseshift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
    • G01F1/663Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by measuring frequency, phaseshift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters by measuring Doppler frequency shift
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
    • G01F23/22Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electric or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284Electromagnetic waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by floats

Abstract

The invention discloses a kind of water level and run-off Data collection and precessing system and method, which includes water level and run-off data collection station and data center, is wireless communication link between the water level and run-off data collection station and data center;The waterlevel data acquisition terminal includes indicator water sensor and supersonic Doppler flow sensor, control circuit, data acquisition circuit, current converter circuit, GPS module and GPRS wireless communication modules, the control circuit is connect respectively with data acquisition circuit, current converter circuit, GPRS wireless communication modules, the current converter circuit is connect with indicator water sensor, the data acquisition circuit is connected with supersonic Doppler flow sensor, GPS module, and the current converter circuit, data acquisition circuit, GPRS wireless communication modules are sequentially connected.The present invention is easy to operate, easy to use, of low cost, benefit is good.

Description

A kind of water level and run-off Data collection and precessing system and method
Technical field
The invention belongs to hydraulic engineering technical fields, are related to a kind of water level and run-off Data collection and precessing system and side Method.
Background technology
Hydrological variation under background of global climate change has become research hotspot, and global water resources are increasingly in short supply, increasingly frequency Numerous flood and arid forces researcher to obtain real-time and high-precision hydrological observation data with policymaker, to meet research people Member is with policymaker to the needs of the formulation of water resources optimal operation and ecological policy.
Based on the active demand above acquired data with decision, need to strengthen the hydrology and weather to focus of attention region Changing rule, and combine spatial dimension scale and carry out accurate quantification research.It would therefore be highly desirable to it explores a kind of suitable for different observations The technology that can easily, accurately acquire with processing water level and run-off data under region and DIFFERENT METEOROLOGICAL CONDITIONS.
Invention content
The purpose of the present invention is to provide a kind of water level and run-off Data collection and precessing system and methods.Reach following Purpose:
(1) it realizes for the real-time accurate acquisition of reservoir, lake, river level data and river ethic data and meter It calculates, measurement range 0-35m (indicator water sensor probe to water surface distance, note:Actual water level=indicator water sensor probe To water-bed distance-indicator water sensor probe to water surface distance), measurement accuracy ± 3mm;(2) realize for reservoir, lake and The acquisition of river level data, river ethic data and related data (referring to 2 water-level observation tables of data of annex table), coding and Wireless data transmission;(3) reservoir, lake, river level data and river ethic are realized in data center server The reception and storage of data;(4) the shared and hair of the waterlevel data and river ethic data to being stored in data center is realized Cloth.
Its specific technical solution is:
A kind of water level and run-off Data collection and precessing system, including water level and run-off data collection station and data Center is wireless communication link between the water level and run-off data collection station and data center;The waterlevel data and River flow acquisition terminal includes indicator water sensor, supersonic Doppler flow sensor, control circuit, data acquisition electricity Road, current converter circuit, GPS module and GPRS wireless communication modules, the control circuit respectively with data acquisition counting circuit, Current converter circuit, the connection of GPRS wireless communication modules, how general the current converter circuit and indicator water sensor, ultrasonic wave be Strangle flow sensor connection, the data acquisition circuit connects with GPS module, the current converter circuit, data acquisition circuit, GPRS wireless communication modules are sequentially connected;The data center includes real-time communication server, database server, WebGIS clothes Be engaged in device, LAN, Web server, Internet network, portable computer, PDA;
The water level and run-off data collection station pass through indicator water sensor, supersonic Doppler flow sensor Automatic Observation river level and flow velocity, acquisition calculates water level and data on flows, by embedded built in observation device control circuit Software accumulates automatically according to water level, flow velocity and cross section of river and calculates river ethic.The indicator water sensor is located on the water surface Side, the control circuit start by set date indicator water sensor accurately measure ultrasonic sensor probe to water surface distance, with reference to Ultrasonic probe obtains waterlevel data to water-bed distance, wherein water level=ultrasonic probe to bottom distance-probe to the water surface away from From;River flow is remotely measured using non-contact laser Doppler's Flow speed measurer, run-off=cross section of river product × flow velocity, Formula:Q=A × V, wherein Q are run-off, and A is cross section of river area, and V is flow velocity.Cross section of river product A is controlled by observation device Embedded software built in circuit is obtained by river observation position river level and run-off relation table computation of table lookup.The control Circuit obtains data acquisition time and observation position longitude and latitude by GPS module;
The data acquisition circuit uses UDP wireless communication protocols, by GPRS wireless communication modules to 16 scale codings Hydrographic data carries out long distance wireless data transmission;
The data server receives and parses through data acquisition circuit by connecting the real-time communication server of network and passes through 16 binary datas of GPRS wireless communication modules transmission;
The remote control computer is referred to by real-time communication server to water level and the transmission of run-off data collection station It enables reading terminals working condition and data acquiring frequency is set;
The Web server automatically scanning hydrological data bank simultaneously issues water level and run-off data by Web server.
The Web GIS service device shows the space and geographical position of observation point according to the longitude and latitude of observation point on the electronic map It puts and water level and run-off data.
Further, SD card is equipped in the control circuit, when the SD card automatically saves water level and run-off data, acquisition Between and observation position longitude and latitude.
Further, the database server of the data center is equipped with data processing module, by water level and run-off data, Acquisition time and observation position longitude and latitude are stored automatically in the hydrological data bank of data server.
Further, the database server of the data center is equipped with data analysis module, is observed according to hydrological data bank The time series of water level and run-off calculate water level and run-off at any time with season and meteorological situation of change and provide automatically Statistic analysis result.
Further, the database server of the data center is equipped with data analysis module, passes through water level, run-off data Flood or drought early warning system are established with meteorological data, is issued when water level and run-off reach flood level and run-off threshold value Flood warning information, continuous observation start drought and water shortage early warning or low water early warning letter when being down to arid water level and run-off threshold value Breath.
A kind of water level and run-off data acquisition and processing (DAP) method, include the following steps:
Step (1) determines observation position, sets up indicator water sensor and supersonic Doppler flow sensor, measures Indicator water sensor probe and water-bed distance dwb, consider from the stability and precision of measurement, are visited in indicator water sensor The water surface places round buoy immediately below head;
Step (2) is powered on to indicator water sensor and the power supply of supersonic Doppler flow sensor, indicator water Sensor output is 4-20mA current signals, and by current converter circuit and control circuit, indicator water sensor is exported electricity Stream signal is converted to the 16 scale coding serial datas using RS485 serial data communication agreements, and supersonic Doppler flow velocity passes Sense output RS485 communication protocol datas;
Step (3), data acquisition circuit are wireless to data center using udp protocol by GPRS wireless data transfer modules It transmits 16 scale codings and the water level of check bit and run-off data is added using CRC cyclic redundancy check algorithms;
Step (4), connection Internet and the data center server with fixed IP are connect by the data of automatic running It receives program and receives and parses through the water level of 16 scale codings and run-off data automatically;Data processor is calculated according to dwb and dws Go out waterlevel data and be stored in waterlevel data library;
Step (5), data publication program timing automatically scanning database simultaneously pass through Web server to access waterlevel data Authorized user issues waterlevel data according to tables of data form in real time.Or it is provided according to user terminal querying condition and meets search request Water level and run-off data;Web GIS service device shows the space of observation point according to the longitude and latitude of observation point on the electronic map Geographical location, authorized user can be by the icon pop-up window dynamic datas of observation point on mouse-click electronic map, mainly Including observation point water level and run-off data, indicator water sensor information, current meter information, observation point picture.Data center Server data analysis program can be calculated automatically according to the time series of waterlevel data library observed stage and run-off water level and Run-off at any time with season and meteorological situation of change and provide statistic analysis result automatically.Output element for year, the moon, season, Day water level maximum value, minimum value mean value and year, the moon, season, day add up run-off.According to meteorological measuring and waterlevel data into Row water level, the correlation analysis of precipitation and temperature and assessment;
Step (6), step (5) analysis on the basis of by water level, run-off data and meteorological data establish flood or Drought early warning system issues flood warning information when water level and run-off reach flood level threshold value, and continuous observation is down to dry Start drought and water shortage early warning or low water warning information when non-irrigated water level and run-off.
Further, in step (2), indicator water current output sensor signal is converted to using RS485 serial datas The specific transfer process of 16 scale coding serial datas of communication protocol is:Data acquisition circuit is sensed by indicator water first Device output current calculates sensor distance water surface float distance dws (distance of water surface) and is converted For RS485 data, sensor probe is apart from water surface distance dws=(indicator water current output sensor value -4mA) × radar water Level sensor amount/(20mA-4mA).In test transducer range 0-35m used, then (indicator water sensor is defeated by dws= Go out current value -4mA) × 35/ (20mA-4mA)=2.1875 × (indicator water current output sensor value -4mA).If radar Water level sensor output current value is 4mA, then dws=0 is calculated according to more than calculation formula, is measured by gauge Sensor probe to bottom distance dwb (distance of water bottom), then sensor probe apart from the water surface away from From dws=0m, water level dw (depth of water)=dwb-dws=dwb-0=dwb, if indicator water sensor current Value=20mA, then sensor probe is apart from water surface distance dws=35m, water level dw=dwb-35.Water level is calculated in data center It is automatically performed on server according to dwb, dws, water level sensor range and calculation formula.Run-off Q=cross section of rivers accumulate A × stream Fast V, embedded software built in observation device control circuit carry out serial RS485 waterlevel datas 16 scale codings and using CRC Cyclic redundancy check algorithm generates the check bit of data.
Further, in step (5), it is all observed quantities of a certain period to meet the water level of search request and run-off data The water level of all time serieses of water level and run-off data or a certain observation point and run-off data.
Compared with prior art, beneficial effects of the present invention are:
The present invention is easy to operate, easy to use, of low cost, benefit is good.
Description of the drawings
Fig. 1 is the schematic diagram of water level and run-off Data collection and precessing system;
Fig. 2 be data acquisition circuit, current converter circuit and control circuit schematic diagram, wherein, Fig. 2A for data acquisition electricity Road, Fig. 2 B are current converter circuit, Fig. 2 C circuits in order to control.
Specific embodiment
Technical scheme of the present invention is described in more detail in the following with reference to the drawings and specific embodiments.
As Figure 1-Figure 2, a kind of water level and run-off Data collection and precessing system, including waterlevel data acquisition terminal And data center, it is wireless communication link between the water level and run-off data collection station and data center;The water level Include indicator water sensor, supersonic Doppler flow sensor, control circuit, data with run-off data collection station to adopt Collector, current converter circuit, GPS module and GPRS wireless communication modules, the control circuit respectively with data acquisition circuit, Current converter circuit, the connection of GPRS wireless communication modules, the current converter circuit are connect with indicator water sensor and flow velocity, The data acquisition circuit is connected with GPS module, the current converter circuit, data acquisition circuit, GPRS wireless communication modules It is sequentially connected;The data center includes real-time communication server, database server, Web GIS service device, LAN, Web Server, Internet network, portable computer, PDA;
The water level and run-off data collection station automatic Observation river level and flow velocity, pass through the water level acquired in real time The water level in river and run-off data, the indicator water sensor is calculated with flow speed data application Runoff Calculation Method Above the water surface, the control circuit start by set date indicator water sensor accurately measures ultrasonic sensor probe to the water surface Distance obtains waterlevel data, wherein water level=ultrasonic probe to water-bed distance-probe with reference to ultrasonic probe to water-bed distance To water surface distance;The control circuit obtains data acquisition time and observation position longitude and latitude by GPS module;
The data acquisition circuit uses UDP wireless communication protocols, by GPRS wireless communication modules to 16 scale codings Data carry out wireless data transmission;
The data server receives and parses through data acquisition circuit by connecting the real-time communication server of network and passes through 16 binary datas of GPRS wireless communication modules transmission;
The remote control computer is referred to by real-time communication server to water level and the transmission of run-off data collection station It enables reading terminals working condition and data acquiring frequency is set;
The Web server automatically scanning hydrological data bank simultaneously issues water level and run-off data by Web server.
The Web GIS service device shows the space and geographical position of observation point according to the longitude and latitude of observation point on the electronic map It puts and water level and run-off data.
SD card is equipped in the control circuit, the SD card automatically saves water level and run-off data, acquisition time and sight Location puts longitude and latitude.
The database server of the data center is equipped with data processing module, during by water level and run-off data, acquisition Between and observation position longitude and latitude be stored automatically in the hydrological data bank of data server.
The database server of the data center is equipped with data analysis module, is observed according to water level and run-off database The time series of water level and run-off calculate water level and run-off at any time with season and meteorological situation of change and provide automatically Statistic analysis result.
The database server of the data center is equipped with data analysis module, passes through water level, run-off data and meteorology Data establish flood or drought early warning system, and flood warning information is issued when water level and run-off reach flood level threshold value, Continuous observation starts drought and water shortage early warning or low water warning information when being down to arid water level and run-off threshold value.
A kind of water level and run-off data acquisition and processing (DAP) method, include the following steps:(1) it determines observation position and sets up Indicator water sensor and supersonic Doppler flow sensor;(2) current signal for exporting indicator water sensor is converted For RS485 data;(3) data are transmitted to data center using GPRS module;(4) data center receives data, parsing data simultaneously It is stored in water level and run-off database (table 2);(5) data publication routine access and computer network is passed through with B/S patterns Issue the water level and run-off data in hydrological data bank.
Embodiment 1
By taking river level and run-off measure as an example, specific method is as follows:(1) observation position and radar used are determined first Water level sensor model, measurement range, measurement accuracy, operating temperature, output signal and operating voltage.Select measurement accuracy compared with Height meets the SEBAPULS30 indicator waters sensor of measurement request and supersonic Doppler flow sensor.(2) in observation bit It puts and indicator water sensor, buoy and supersonic Doppler flow sensor, instrumentation radar is placed and set up according to installation specification Water level sensor away from bottom distance dwb (observation position fix and indicator water sensor fix after, indicator water sensor probe The water-bed distance dwb of distance is constant);(3) accumulator 12VDC power supplys are connected, by current signal conversion circuit by indicator water Current output sensor signal, is converted to RS485 data at observation point longitude and latitude degrees of data;Supersonic Doppler flow sensor is transported With doppler principle, using it is distant away from measurement by the way of, measure the flow velocity of water;(4) circuit carries out 16 system volumes to RS485 data Code uses CRC cyclic redundancy check algorithm to supplement the reliability that check bit ensures wireless data transmission.(5) circuit passes through Water level after coding and run-off data are wirelessly transmitted to data center by GPRS wireless communication modules and Internet Server.(6) water level and run-off data and will be according to attached that data center server receives, parsing collection terminal is sent 2 water-level observation tables of data form of table stores water level and run-off data in the database in record.(7) data center passes through WebGIS Server issues water level and run-off data WebServices, and authorized user is by that can monitor indicator water sensor in real time Working condition simultaneously may have access to the water level of publication and run-off data.(8) preceding step is repeated.
1 SEBAPULS30 indicator water sensor technology parameters of table
Measurement range 0-35m
Measurement accuracy ±3mm
Operating temperature - 40~+80 DEG C
Output signal Electric current:4-20mA
Operating voltage 12VDC or 24VDC
(SEBAPULS series indicator water Fundamentals of Sensors:SEBAPULS series indicator water sensors are to utilize microwave Pulse is emitted and is received by antenna.Indicator water sensor radar wave is run with the light velocity, and run time can pass through electricity at a high speed Road is converted into water level signal.SEBAPULS series indicator waters sensor measurement is not by rings such as temperature, humidity, wind speed, rainfalls Border factor influences.Indicator water sensor measures water level in a non contact fashion, not by influence on water body.The range accuracy of radar wave is Grade, water-level gauge by internal wave filter function, SEBAPULS30 indicator waters sensor measured water level precision up to 1 to 2 centimetres, range ability maximum is up to 35 meters (distances of radar probe to the water surface).SEBAPULS series indicator water sensors are defeated Go out signal for electric current:4-20mA)
2 supersonic Doppler flow sensor technical parameter of table
Measure flow rates 0.02m/s~5.00m/s
Measurement Resolution 1mm/s
Precision Measure ± the 2~3% of flow velocity
Operating temperature 0~50 DEG C
Output signal RS485
Operating voltage 12VDC~15VDC
3 water level of table and run-off tables of data
(note:Data dws in table 3:(distance of water surface) indicator water sensor probe is apart from water Identity distance from;dwb:(distance of water bottom) indicator water sensor probe is to water-bed distance;Water level dw: (depth of water), dw=dwb-dws;A:Cross section of river accumulates)
The foregoing is only a preferred embodiment of the present invention, protection scope of the present invention is without being limited thereto, it is any ripe Those skilled in the art are known in the technical scope of present disclosure, the letter for the technical solution that can be become apparent to Altered or equivalence replacement are each fallen in protection scope of the present invention.

Claims (8)

1. a kind of water level and run-off Data collection and precessing system, which is characterized in that including waterlevel data acquisition terminal sum number It is wireless communication link according to center, between the waterlevel data acquisition terminal and data center;The waterlevel data acquisition terminal Including indicator water sensor, control circuit, data acquisition circuit, current converter circuit, GPS module and GPRS radio communication molds Block, the control circuit are connect respectively with data acquisition circuit, current converter circuit, GPRS wireless communication modules, the electric current Conversion circuit is connect with indicator water sensor, and the data acquisition circuit is connected with GPS module, the current converter circuit, Data acquisition circuit, GPRS wireless communication modules are sequentially connected;The data center includes real-time communication server, database takes Be engaged in device, Web GIS service device, LAN, Web server, Internet network, portable computer, PDA;
The water level and run-off data collection station automatic Observation river, lake level acquire waterlevel data and discharge of river Data are measured, the indicator water sensor is located above the water surface, and the control circuit start by set date indicator water sensor is accurate Ultrasonic sensor probe is measured to water surface distance, waterlevel data, wherein water level are obtained to water-bed distance with reference to ultrasonic probe =ultrasonic probe is to water-bed distance-probe to water surface distance, run-off Q=cross section of rivers product A × flow velocity V, it is described control it is electric Road obtains data acquisition time and observation position longitude and latitude by the GPS module being connect with data acquisition circuit;
The data acquisition circuit uses UDP wireless communication protocols, by GPRS wireless communication modules to 16 scale coding data Carry out wireless data transmission;
The data server receives and parses through data acquisition circuit by connecting the real-time communication server of network and passes through GPRS 16 binary datas of wireless communication module transmission;
The remote control computer sends instruction reading terminals work by real-time communication server to waterlevel data acquisition terminal Make state and data acquiring frequency is set;
The Web server automatically scanning hydrological data bank simultaneously issues water level and run-off data by Web server;
The Web GIS service device according to the longitude and latitude of observation point show on the electronic map observation point spatial geographical locations and Water level, run-off data.
2. water level according to claim 1 and run-off Data collection and precessing system, which is characterized in that the control electricity SD card is equipped in road, the SD card automatically saves waterlevel data, acquisition time and observation position longitude and latitude.
3. water level according to claim 1 and run-off Data collection and precessing system, which is characterized in that in the data The database server of the heart is equipped with data processing module, by water level and run-off data, acquisition time and observation position longitude and latitude It is stored automatically in the hydrological data bank of data server.
4. water level according to claim 1 and run-off Data collection and precessing system, which is characterized in that in the data The database server of the heart is equipped with data analysis module, is calculated according to the time series of hydrological data bank observed stage and run-off Go out water level and run-off at any time with season and meteorological situation of change and provide statistic analysis result automatically.
5. water level according to claim 1 and run-off Data collection and precessing system, which is characterized in that in the data The database server of the heart is equipped with data analysis module, and flood or arid are established by water level, run-off data and meteorological data Early warning system issues flood warning information, continuous observation drop when water level and run-off reach flood level and run-off threshold value To startup drought and water shortage early warning or low water warning information when arid water level and run-off threshold value.
6. a kind of water level and run-off data acquisition and processing (DAP) method, which is characterized in that include the following steps:
Step (1) determines observation position, sets up indicator water sensor and supersonic Doppler flow sensor, instrumentation radar Water level sensor is popped one's head in and water-bed distance dwb, is considered from stability and the situation of precision, in indicator water sensor probe just The lower section water surface places round buoy;
Step (2) is powered on to indicator water sensor and the power supply of supersonic Doppler flow sensor, indicator water sensing Device output is 4-20mA current signals, and by current converter circuit and control circuit, indicator water current output sensor is believed Number be converted to the 16 scale coding serial datas using RS485 serial data communication agreements, supersonic Doppler flow sensor Output uses the flow speed data of RS485 serial communication protocols;
Step (3), data acquisition circuit are wirelessly transferred by GPRS wireless data transfer modules using udp protocol to data center 16 scale codings simultaneously add the water level of check bit and run-off data using CRC cyclic redundancy check algorithms;
The data receiver journey that step (4), connection Internet and the data center server with fixed IP pass through automatic running Sequence receives and parses through the waterlevel data of 16 scale codings automatically;Data processor calculates waterlevel data simultaneously according to dwb and dws Waterlevel data and run-off data are stored in waterlevel data library;
Step (5), data publication program timing automatically scanning database simultaneously pass through Web server to the mandate for accessing waterlevel data User issues water level and run-off data according to tables of data form in real time;Or it is provided according to user terminal querying condition and meets inquiry It is required that water level and run-off data, Web GIS service device observation point is shown according to the longitude and latitude of observation point on the electronic map Spatial geographical locations, authorized user is by the icon pop-up window dynamic data of observation point on mouse-click electronic map, mainly Including observation point water level and run-off data, indicator water sensor information, supersonic Doppler flow sensor information, observation Point picture;Data center server data analysis program calculates water outlet automatically according to the time series of waterlevel data library observed stage Position and run-off at any time with season and meteorological situation of change and provide statistic analysis result automatically;Output element is year, the moon, season Degree, day water level maximum value, minimum value mean value and year, the moon, season, day add up run-off, according to meteorological measuring and water level number According to correlation analysis and the assessment for carrying out water level, run-off, precipitation and temperature;
Step (6) establishes flood or arid on the basis of step (5) analysis by water level and run-off data and meteorological data Early warning system issues flood warning information, continuous observation drop when water level and run-off reach flood level and run-off threshold value To startup drought and water shortage early warning or low water warning information when arid water level and run-off.
7. water level according to claim 6 and run-off data acquisition and processing (DAP) method, which is characterized in that in step (2), Indicator water current output sensor signal is converted into the 16 scale coding serial numbers using RS485 serial data communication agreements According to specific transfer process be:Sensor distance water surface float distance is calculated by indicator water current output sensor first Dws is simultaneously converted into RS485 data, and sensor probe is apart from water surface distance dws=(indicator water current output sensors Value -4mA) × indicator water sensing tolerance/(20mA-4mA);In test transducer range 0-35m used, then dws=(thunders Up to water level sensor output current value -4mA) × 35/ (20mA-4mA)=2.1875 × (indicator water current output sensor Value -4mA);If indicator water current output sensor value is 4mA, then dws=0 is calculated according to more than calculation formula, The sensor measured by gauge is to bottom distance dwb, water level dw=dwb-dws=dwb, if indicator water sensor Current value=20mA, then dws=35m, water level dw=dwb-35;Water level calculate on data center server according to dwb, Dws, water level sensor range and calculation formula are automatically performed;Processor carries out 16 scale codings simultaneously to water level and run-off data Using the check bit of CRC cyclic redundancy check algorithm generation data.
8. water level according to claim 6 and run-off data acquisition and processing (DAP) method, which is characterized in that in step (5), It is the water level and run-off data of all observed quantities of a certain period or a certain sight to meet the water level of search request and run-off data The water level of all time serieses of measuring point and run-off data.
CN201711395658.7A 2017-12-21 2017-12-21 A kind of water level and run-off Data collection and precessing system and method Pending CN108204848A (en)

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CN109800988A (en) * 2019-01-18 2019-05-24 三峡大学 A kind of suitable drought-resistant ability analysis method based on benefit-cost-ratio function
CN109975578A (en) * 2019-04-09 2019-07-05 武汉新烽光电股份有限公司 Runoff velocity method for real-time measurement, system and control device
CN110738358A (en) * 2019-09-23 2020-01-31 中国水利水电科学研究院 Ecological flow guaranteeing method and device based on land utilization mode optimization
CN111101477A (en) * 2019-12-30 2020-05-05 长江大学 Method for determining low water flow during supplement testing of data-free design basin
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CN111101477A (en) * 2019-12-30 2020-05-05 长江大学 Method for determining low water flow during supplement testing of data-free design basin

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