CN104535125A - Stream flow monitoring device and stream flow computing method - Google Patents
Stream flow monitoring device and stream flow computing method Download PDFInfo
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Abstract
The invention belongs to the flow monitoring technical field and in particular relates to a stream flow monitoring device and a stream flow computing method. The stream flow monitoring device comprises a flow velocity measurement module, a water level measurement module, a microprocessor module, a storage module, a keyboard display module, a GPRS (General Packet Radio Service) module and a power supply module, wherein the flow velocity measurement module adopts an ultrasonic transducer and adopts an ultrasonic velocity difference method to calculate the stream flow velocity; the water level measurement module adopts the ultrasonic transducer to calculate the water level and then calculates the cross section area of a stream channel, so as to calculate the stream flow; and the GPRS module can realize remote data transmission and further realize real-time control. According to the stream flow monitoring device, the stream flow can be monitored in real time and remote data transmission can be realized, the stream flow monitoring device has the advantages that no contact measurement is adopted, installation is simple, little influence on equipment is caused, the accuracy is high and remote transmission can be realized, and is very suitable for monitoring the stream flow of small hydropower stations in mountainous areas of China.
Description
Technical field
The invention belongs to flow monitoring technical field, particularly a kind of river discharge monitoring device and river discharge computing method.
Background technology
Small power station with its small scale, engineering is simple, the completion time of project is short, it is fast to produce effects, make full use of the natural resources, feature profitable on ecology is extensively distributed in mountain area away from bulk power grid, is the important component part of fuel in China's rural areas.In small power station's power generation process, river discharge is the key factor affecting small power station's power benefit, and accurately real-time river discharge monitoring, can take measures in time in rich/low water season, ensure that small power station effectively powers, be also the key link realizing rural electricity consumption rationalization simultaneously.Therefore Real-Time Monitoring river discharge in small power station's power generation process, has great importance to control small power station's electricity generation efficiency and rural area rational utilization of electricity.
Present flow monitoring is applied in pipeline blowdown, pipeline energy source and simple flow measurement aspect more, and rare people monitors mountain stream flow.And natural river course situation is complicated, use liquid level sensor difficult arrangement, liquid level sensor is directly arranged in measured medium by most flow monitoring device, and long-time use is easily corroded, and precision is not high, can not remote transmission.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of river discharge monitoring device and river discharge computing method, thus solve that existing equipment is difficult to arrange, perishable, degree of accuracy is not high, can not the shortcoming of remote transmission.
The technical solution adopted in the present invention is:
Described river discharge monitoring device comprises fluid-velocity survey module, level measuring module, microprocessor module, memory module, keyboard display module, GPRS module and power module, it is characterized in that: described fluid-velocity survey module, level measuring module, memory module, keyboard display module, GPRS module are connected with microprocessor module respectively with power module;
Described fluid-velocity survey module installation two ultrasonic transducers, adopt ultrasonic velocity difference method to measure river flow;
Described level measuring module adopts a ultrasonic transducer to measure water level;
Described GPRS module realizes the remote transmission of data.
Described fluid-velocity survey module comprises time measuring circuit, a CPLD chip, the first ultrasonic transduction driving circuit, the first transducer, the second transducer, the first transmitting-receiving sequential control circuit and the first signal processing circuit; One CPLD chip is received and dispatched sequential control circuit with the first ultrasonic transduction driving circuit, time measuring circuit, first respectively and is connected, first ultrasonic transduction driving circuit is connected with the first transducer, the second transducer respectively, first transducer, the second transducer are are all received and dispatched sequential control circuit with first and are connected, first transmitting-receiving sequential control circuit is connected with the first signal processing circuit, and the first signal processing circuit is connected with a CPLD chip; Time measuring circuit is connected with microprocessor module respectively with a CPLD chip.
Described level measuring module comprises the 2nd CPLD chip, the second ultrasonic transduction driving circuit, the 3rd transducer, the second transmitting-receiving sequential control circuit and secondary signal treatment circuit; 2nd CPLD chip is received and dispatched sequential control circuit with the second ultrasonic transduction driving circuit, second and is connected, second ultrasonic transduction driving circuit is connected with the 3rd transducer, 3rd transducer and second is received and dispatched sequential control circuit and is connected, second transmitting-receiving sequential control circuit is connected with secondary signal treatment circuit, and secondary signal treatment circuit is connected with the 2nd CPLD chip; 2nd CPLD chip is connected with microprocessor module.
The river discharge computing method of a kind of described river discharge monitoring device provided by the invention, comprise the following steps:
Step (1): measure acquisition river flow by ultrasonic velocity difference method by fluid-velocity survey module;
Step (2): measure river level by level measuring module, be divided into regular stream shape measuring method and irregular stream shape measuring method;
Described regular stream shape measuring method is as follows:
It is T that ultrasonic transducer sends a beam pulse to time of return, calculates the distance of ultrasonic transducer apart from the tested water surface
therefore, river level H=H
0-H
1, wherein, H
0for the distance of ultrasonic transducer distance bottom of river channel extreme lower position, V is acoustic wave propagation velocity;
Described irregular stream shape measuring method is as follows:
It is T that ultrasonic transducer sends a beam pulse to time of return, calculates the distance of ultrasonic transducer apart from the tested water surface
bottom along cross section, river course marks off several equally distributed measurement points, and cross section, river course is divided into n section, measures the vertical range A between ultrasonic transducer and these measurement points respectively
i, therefore, the river level of each measurement point is a
i=A
i-H
1, wherein, V is acoustic wave propagation velocity, and i is the positive integer being not more than n-1;
Step (3): measure according to step (2) waterlevel data obtained and calculate river course cross-sectional area S;
Step (4), measures river discharge: Q=S × V.
In described step (3), when river course xsect is parabolical, river course cross-sectional area S is:
wherein, ε is minimum integrable constant;
When river course xsect is trapezoidal, river course cross-sectional area S is:
wherein, L is river bed width, and α is river bed and river levee angle;
When river course xsect is irregular shape, river course cross-sectional area S is:
wherein, l is the spacing of adjacent two measurement points in the bottom in cross section, river course, n be greater than 1 positive integer.
Also comprise and be stored into memory module by measuring the data obtained, and river flow measurement obtained, river level, river discharge data are sent to the step of remote wireless terminal equipment by GPRS module.
The invention has the beneficial effects as follows:
Fluid-velocity survey module have employed ultrasonic transducer, adopts ultrasonic velocity difference method to calculate river flow; Level measuring module have employed ultrasonic water level sensor and measures water level.Flow measurement module and level measuring module adopt ultrasonic transducer, improve DATA REASONING precision and service life of equipment; What the river flow that measurement can obtain by GPRS module, river level, river discharge information were real-time is transferred to remote wireless terminal equipment.Described river discharge monitoring device is convenient to lay in practice, support small power station's river discharge monitoring, and can by river flow, river level, river discharge data transferring to wireless terminal device, have and adopt heed contacted measure to install simply, affect little on equipment, accuracy is high, can the advantage of remote transmission, be applicable to very much the monitoring of China's small hydropower plants in mountainous area river discharge.
Accompanying drawing explanation
Fig. 1 is river discharge monitoring device structural representation in the embodiment of the present invention;
Fig. 2 parabolical stream shape schematic diagram;
Fig. 3 is trapezoidal stream shape schematic diagram;
Fig. 4 is irregular shape stream shape schematic diagram;
Fig. 5 is river discharge calculation flow chart.
Embodiment
The invention provides a kind of river discharge monitoring device and river discharge computing method, below in conjunction with the drawings and specific embodiments, the present invention is further described.
River discharge monitoring device as shown in Figure 1.This river discharge monitoring device comprises fluid-velocity survey module, level measuring module, microprocessor module, memory module, keyboard display module, GPRS module and power module, it is characterized in that: described fluid-velocity survey module, level measuring module, memory module, keyboard display module, GPRS module are connected with microprocessor module respectively with power module.GPRS module realizes the remote transmission of data.
Described fluid-velocity survey module comprises time measuring circuit, a CPLD chip, the first ultrasonic transduction driving circuit, the first transducer, the second transducer, the first transmitting-receiving sequential control circuit and the first signal processing circuit; One CPLD chip is received and dispatched sequential control circuit with the first ultrasonic transduction driving circuit, time measuring circuit, first respectively and is connected, first ultrasonic transduction driving circuit is connected with the first transducer, the second transducer respectively, first transducer, the second transducer are are all received and dispatched sequential control circuit with first and are connected, first transmitting-receiving sequential control circuit is connected with the first signal processing circuit, and the first signal processing circuit is connected with a CPLD chip; Time measuring circuit is connected with microprocessor module respectively with a CPLD chip.Fluid-velocity survey module adopts ultrasonic velocity difference method to measure river flow.
Described level measuring module comprises the 2nd CPLD chip, the second ultrasonic transduction driving circuit, the 3rd transducer, the second transmitting-receiving sequential control circuit and secondary signal treatment circuit; 2nd CPLD chip is received and dispatched sequential control circuit with the second ultrasonic transduction driving circuit, second and is connected, second ultrasonic transduction driving circuit is connected with the 3rd transducer, 3rd transducer and second is received and dispatched sequential control circuit and is connected, second transmitting-receiving sequential control circuit is connected with secondary signal treatment circuit, and secondary signal treatment circuit is connected with the 2nd CPLD chip; 2nd CPLD chip is connected with microprocessor module.
Adopt the river discharge computing method of above-mentioned river discharge monitoring device, its step is as follows:
Step (1): measure acquisition river flow by ultrasonic velocity difference method by fluid-velocity survey module;
Step (2): measure river level by level measuring module, be divided into regular stream shape measuring method and irregular stream shape measuring method;
Described regular stream shape measuring method is as follows:
It is T that highly fixing ultrasonic transducer sends a beam pulse to time of return, calculates the distance of ultrasonic transducer apart from the tested water surface
therefore, river level H=H
0-H
1, wherein, H
0for the distance of ultrasonic transducer distance bottom of river channel extreme lower position, V is acoustic wave propagation velocity, is 344m/s;
Described irregular stream shape measuring method is as follows:
It is T that highly fixing ultrasonic transducer sends a beam pulse to time of return, calculates the distance of ultrasonic transducer apart from the tested water surface
bottom along cross section, river course marks off several equally distributed measurement points, and cross section, river course is divided into n section, measures the vertical range A between ultrasonic transducer and these measurement points respectively
i, therefore, the river level of each measurement point is a
i=A
i-H
1, wherein, V is acoustic wave propagation velocity, and i is the positive integer being not more than n-1;
Step (3): measure according to step (2) waterlevel data obtained and calculate river course cross-sectional area S;
Cross section, river course is divided into regular shape (as parabolical and trapezoidal) and irregularly shaped usually, below for these three kinds of situations, provides the computing method of river course cross-sectional area S respectively:
As shown in Figure 2, when river course xsect is parabolical, river course cross-sectional area S is:
wherein, ε is minimum integrable constant;
As shown in Figure 3, when river course xsect is trapezoidal, river course cross-sectional area S is:
wherein, L is river bed width, and α is river bed and river levee angle;
As shown in Figure 4, when river course xsect is irregular shape, river course cross-sectional area S is:
wherein, l is the spacing of adjacent two measurement points in the bottom in cross section, river course, n be greater than 1 positive integer.
Still for Fig. 4, arrange 11 measurement points, river course xsect is divided into 12 parts, wherein, the water level of middle measurement point is designated as a
1, be designated as a successively from middle measurement point measurement point water level left
2, a
3, a
4, a
5, a
6, be designated as a successively from middle measurement point measurement point water level to the right
7, a
8, a
9, a
10, a
11, the cross-sectional area in its then each section of river course is designated as S
j, 1≤j≤12, obtain:
Then can obtain:
Step (4), calculates river discharge: Q=S × V.
Can by known river course parameter by input through keyboard microprocessor module in the present embodiment, thus judgement stream shape, suitable computing formula is selected to calculate cross-sectional area, simultaneously with the river flow product calculating river discharge adopting the measurement of ultrasonic propagation velocity difference method to obtain, calculation process as shown in Figure 5.
Further, the river flow obtained by described computing method, river level, river discharge are stored into memory module, and show river discharge by LCD; The river flow obtained by described computing method, river level, river discharge data are sent to remote wireless terminal equipment by GPRS module simultaneously.
The above embodiment is only for illustration of patent of invention, but not the restriction to patent of the present invention.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, various combination, amendment or equivalent replacement are carried out to technical scheme of the present invention, do not depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (6)
1. a river discharge monitoring device, comprise fluid-velocity survey module, level measuring module, microprocessor module, memory module, keyboard display module, GPRS module and power module, it is characterized in that: described fluid-velocity survey module, level measuring module, memory module, keyboard display module, GPRS module are connected with microprocessor module respectively with power module;
Described fluid-velocity survey module installation two ultrasonic transducers, adopt ultrasonic velocity difference method to measure river flow;
Described level measuring module adopts a ultrasonic transducer to measure water level;
Described GPRS module realizes the remote transmission of data.
2. a kind of river discharge monitoring device according to claim 1, it is characterized in that, described fluid-velocity survey module comprises time measuring circuit, a CPLD chip, the first ultrasonic transduction driving circuit, the first transducer, the second transducer, the first transmitting-receiving sequential control circuit and the first signal processing circuit; One CPLD chip is received and dispatched sequential control circuit with the first ultrasonic transduction driving circuit, time measuring circuit, first respectively and is connected, first ultrasonic transduction driving circuit is connected with the first transducer, the second transducer respectively, first transducer, the second transducer are are all received and dispatched sequential control circuit with first and are connected, first transmitting-receiving sequential control circuit is connected with the first signal processing circuit, and the first signal processing circuit is connected with a CPLD chip; Time measuring circuit is connected with microprocessor module respectively with a CPLD chip.
3. a kind of river discharge monitoring device according to claim 1, it is characterized in that, described level measuring module comprises the 2nd CPLD chip, the second ultrasonic transduction driving circuit, the 3rd transducer, the second transmitting-receiving sequential control circuit and secondary signal treatment circuit; 2nd CPLD chip is received and dispatched sequential control circuit with the second ultrasonic transduction driving circuit, second and is connected, second ultrasonic transduction driving circuit is connected with the 3rd transducer, 3rd transducer and second is received and dispatched sequential control circuit and is connected, second transmitting-receiving sequential control circuit is connected with secondary signal treatment circuit, and secondary signal treatment circuit is connected with the 2nd CPLD chip; 2nd CPLD chip is connected with microprocessor module.
4., based on river discharge computing method for river discharge monitoring device described in claim 1, it is characterized in that, comprise the following steps:
Step (1): measure acquisition river flow by ultrasonic velocity difference method by fluid-velocity survey module;
Step (2): measure river level by level measuring module, be divided into regular stream shape measuring method and irregular stream shape measuring method;
Described regular stream shape measuring method is as follows:
It is T that ultrasonic transducer sends a beam pulse to time of return, calculates the distance of ultrasonic transducer apart from the tested water surface
therefore, river level H=H
0-H
1, wherein, H
0for the distance of ultrasonic transducer distance bottom of river channel extreme lower position, V is acoustic wave propagation velocity;
Described irregular stream shape measuring method is as follows:
It is T that ultrasonic transducer sends a beam pulse to time of return, calculates the distance of ultrasonic transducer apart from the tested water surface
bottom along cross section, river course marks off several equally distributed measurement points, and cross section, river course is divided into n section, measures the vertical range A between ultrasonic transducer and these measurement points respectively
i, therefore, the river level of each measurement point is a
i=A
i-H
1, wherein, V is acoustic wave propagation velocity, and i is the positive integer being not more than n-1;
Step (3): measure according to step (2) waterlevel data obtained and calculate river course cross-sectional area S;
Step (4), measures river discharge: Q=S × V.
5. river discharge computing method according to claim 4, is characterized in that, in described step (3), when river course xsect is parabolical, river course cross-sectional area S is:
wherein, ε is minimum integrable constant;
When river course xsect is trapezoidal, river course cross-sectional area S is:
wherein, L is river bed width, and α is river bed and river levee angle;
When river course xsect is irregular shape, river course cross-sectional area S is:
wherein, l is the spacing of adjacent two measurement points in the bottom in cross section, river course, n be greater than 1 positive integer.
6. river discharge computing method according to claim 4, it is characterized in that, also comprise and be stored into memory module by measuring the data obtained, and river flow measurement obtained, river level, river discharge data are sent to the step of remote wireless terminal equipment by GPRS module.
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| CN105181047A (en) * | 2015-07-17 | 2015-12-23 | 蛟龙（厦门）科技有限公司 | Coastal water flow rate high-frequency acoustic monitoring system and monitoring method thereof |
| CN105222840A (en) * | 2015-09-16 | 2016-01-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Real-time monitoring system and method for let-down ecological flow of hydraulic and hydroelectric engineering |
| CN105333910A (en) * | 2015-10-23 | 2016-02-17 | 浪潮(北京)电子信息产业有限公司 | Flow data acquiring method and terminal based on cloud computing |
| CN106525192A (en) * | 2016-11-16 | 2017-03-22 | 北京中船信息科技有限公司 | Real-time river section measurement device and method |
| CN106643959A (en) * | 2016-12-23 | 2017-05-10 | 黄河水利委员会黄河水利科学研究院 | Method for calculating fluid storage capacity using multiple-sensor |
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| CN109827554A (en) * | 2018-08-02 | 2019-05-31 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of river discharge testing method based on the surveyed river surface flow velocity combination hydraulic model of video |
| CN110426084A (en) * | 2019-06-24 | 2019-11-08 | 北京联创思源测控技术有限公司 | One kind being discontented with pipe integrated current surveying device and method |
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| CN111623246A (en) * | 2020-05-26 | 2020-09-04 | 深圳市恒星物联科技有限公司 | Flange type flow and water pressure monitoring system and monitoring method thereof |
| CN112902919A (en) * | 2021-01-21 | 2021-06-04 | 天津视通智能科技有限公司 | Method, device, equipment and storage medium for measuring pipe trench section data |
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| CN114046831A (en) * | 2021-11-12 | 2022-02-15 | 合肥工业大学 | Groundwater water yield monitoring facilities |
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| CN105181047A (en) * | 2015-07-17 | 2015-12-23 | 蛟龙（厦门）科技有限公司 | Coastal water flow rate high-frequency acoustic monitoring system and monitoring method thereof |
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| CN106525192A (en) * | 2016-11-16 | 2017-03-22 | 北京中船信息科技有限公司 | Real-time river section measurement device and method |
| CN106643959A (en) * | 2016-12-23 | 2017-05-10 | 黄河水利委员会黄河水利科学研究院 | Method for calculating fluid storage capacity using multiple-sensor |
| CN108572016A (en) * | 2018-05-24 | 2018-09-25 | 北京中农精准科技有限公司 | A kind of time service optoacoustic open channel flow rate meter systems |
| CN109827554B (en) * | 2018-08-02 | 2021-01-22 | 水利部交通运输部国家能源局南京水利科学研究院 | River flow testing method based on combination of video-measured river surface flow velocity and hydraulic model |
| CN109827554A (en) * | 2018-08-02 | 2019-05-31 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of river discharge testing method based on the surveyed river surface flow velocity combination hydraulic model of video |
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| CN110455350A (en) * | 2019-07-22 | 2019-11-15 | 河海大学 | A kind of discharge of river comprehensively measuring and calculating method and system |
| CN110455350B (en) * | 2019-07-22 | 2021-01-26 | 河海大学 | River channel flow comprehensive measuring and calculating method and system |
| CN111623246B (en) * | 2020-05-26 | 2022-03-11 | 深圳市恒星物联科技有限公司 | Flange type flow and water pressure monitoring system and monitoring method thereof |
| CN111623246A (en) * | 2020-05-26 | 2020-09-04 | 深圳市恒星物联科技有限公司 | Flange type flow and water pressure monitoring system and monitoring method thereof |
| CN112902919A (en) * | 2021-01-21 | 2021-06-04 | 天津视通智能科技有限公司 | Method, device, equipment and storage medium for measuring pipe trench section data |
| CN113219202A (en) * | 2021-04-16 | 2021-08-06 | 中国水利水电科学研究院 | River hydrological measuring method and device |
| CN113219202B (en) * | 2021-04-16 | 2022-05-17 | 中国水利水电科学研究院 | River hydrological measuring method and device |
| CN114046831A (en) * | 2021-11-12 | 2022-02-15 | 合肥工业大学 | Groundwater water yield monitoring facilities |
| CN114046831B (en) * | 2021-11-12 | 2024-08-16 | 合肥工业大学 | Groundwater water yield monitoring facilities |
| CN117760505A (en) * | 2024-02-22 | 2024-03-26 | 上海临澜环境科技有限公司 | Unmanned detection method and device for water flow |
| CN117760505B (en) * | 2024-02-22 | 2024-05-14 | 上海临澜环境科技有限公司 | Unmanned detection method and device for water flow |
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Application publication date: 20150422 |