CN103792533B - Based on the river cross-section multiple spot flow measurement method of point of fixity - Google Patents
Based on the river cross-section multiple spot flow measurement method of point of fixity Download PDFInfo
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Abstract
The invention discloses a kind of river cross-section multiple spot flow measurement method based on point of fixity, the method realizes based on a radar measurement instrument hard-wired above river course, comprises step: the sea level elevation H that measurement obtains residing for radar measurement instrument and the vertical range w apart from river cross-section to be measured; Measure the distance obtaining the reference point O of each measurement point on river cross-section; Order carries out flow measurement to each measurement point successively, wherein: before fluid-velocity survey is carried out to each measurement point, first to radar measurement instrument adjust its level towards, then adjust its vertical dip angle, to make the detection direction of radar measurement instrument just to measurement point, thus implement flow measurement.River cross-section multiple spot flow measurement method of the present invention, only based on a radar measurement instrument, just can realize the operation of multiple spot flow measurement to measurement point multiple on same river cross-section by level towards adjustment and vertical dip angle adjustment.
Description
Technical field
The present invention relates to a kind of discharge of river measuring method, espespecially a kind of method based on certain point of fixity, the multiple measurement point of river cross-section being realized to flow measurement.
Background technology
At present, the measurement of surface, river course flow realizes mainly with measurement Ship-Mounted ADCP system.Although measure Ship-Mounted ADCP system there is the advantages such as flow measurement speed is fast, accuracy is high, easy to operate, but can find from reality is implemented, when having more floating thing, water turbidity or flow rate of water flow too fast in river course, the accuracy measuring the measurement result that Ship-Mounted ADCP system obtains just can reduce greatly, even cannot normally work.Further, when running into flood, this measurement Ship-Mounted ADCP system also cannot be measured flow rate of water flow timely.
In recent years, along with the cableway-type measurement instrument occurred on the market, create a kind of dynamically flow measurement method, this dynamic flow measurement method can realize the multimetering to river cross-section thereupon.But can find from reality is implemented, needed, above river course, a cableway is installed before this flow measurement method of enforcement, need respectively to install a fixed bar on both sides, river course when installing cableway, as can be seen here, installation cableway is pretty troublesome, cost is high, and, because cableway itself has certain gravity, thus cableway self just cannot be held in straight line, and then causes cableway-type measurement instrument can not run on straight line, make measurement result can there is certain deviation, the impact of also easy by wind effect in addition.
For the current existing fixing flow measurement method realized based on hard-wired measurement instrument, there is following defect in it: first, this fixing flow measurement method can only carry out flow measurement to a measurement point based on hard-wired measurement instrument, the detection direction of this measurement instrument can not change, but when with a varied topography, compared with wide river course, on river cross-section, the flow velocity of any one measurement point cannot represent the flow condition of the whole section in river course, in practice, can be made up by the mode of installing multiple measurement instrument, but the increase of equipment purchasing cost can be caused thereupon.The second, when water level changes, the measurement point of practical measurement can depart from original river cross-section.Such as, as Fig. 1, the fixing flow measurement method implemented based on hard-wired measurement instrument 10 carries out flow measurement by intrinsic setting vertical dip angle all the time, and when water level is water level 1, measurement point is A point, when water level rises to water level 2 from water level 1, actual measurement point changes to B point, and B point obviously deviate from the river cross-section (original river cross-section) of water level 1 correspondence, thus, cause measurement result generation deviation, the true flow condition of original river cross-section cannot be reflected.3rd, this fixing flow measurement method dynamically cannot change measurement point, low to the adaptability to changes of complex situations.
As can be seen here, a kind of to measure the multiple measurement points on same river cross-section and the flow measurement method that measuring accuracy is high, deviation is little is current urgent problem is designed.
Summary of the invention
The object of the present invention is to provide a kind of river cross-section multiple spot flow measurement method based on point of fixity, the method, only based on a radar measurement instrument, just can realize the operation of multiple spot flow measurement to measurement point multiple on same river cross-section by level towards adjustment and vertical dip angle adjustment.
To achieve these goals, present invention employs following technical scheme:
A kind of river cross-section multiple spot flow measurement method based on point of fixity, the method realizes based on a radar measurement instrument hard-wired above river course, this radar measurement instrument by horizontally rotate adjustable level towards, to realize carrying out flow measurement to the multiple measurement points on same river cross-section, and this radar measurement instrument is based on SEA LEVEL VARIATION adjustable vertical dip angle, to ensure to carry out flow measurement based on same river cross-section all the time, it is characterized in that, the method comprises the steps:
Step 1: according to the fixed installation position of this radar measurement instrument, obtains this sea level elevation H residing for radar measurement instrument and this radar measurement instrument vertical range w apart from river cross-section to be measured;
Step 2: set and carry out flow measurement to the measurement point of the n on river cross-section to be measured, measures the distance obtaining the reference point O of this measurement point each on river cross-section;
Step 3: order carries out flow measurement, i=1,2 to n measurement point Ai successively ..., n, wherein, comprises the steps: the flow measurement of this measurement point each
Step a: based on this measurement point Ai apart from the distance 1i of this reference point O and this vertical range w, obtain the subpoint of this radar measurement instrument on the water surface respectively and this measurement point Ai, reference point O line between angle α i, thus calculate horizontal rotation angle based on this angle ai, carry out horizontal rotary to make this radar measurement instrument based on this horizontal rotation angle and transfer towards the direction at this measurement point Ai place;
Step b: the sea level elevation hsi of the sea level elevation H residing for this radar measurement instrument and current level is subtracted each other, try to achieve the vertical height hi of this radar measurement instrument apart from the current water surface, thus based on this vertical height hi and this radar measurement instrument the subpoint on the water surface and the distance Li between this measurement point Ai, try to achieve vertical dip angle β i, so this radar measurement instrument carries out vertical rotation based on this vertical dip angle β i and current inclination in the vertical plane towards this measurement point Ai, to make the detection direction of this radar measurement instrument just to this measurement point Ai;
Step c: fluid-velocity survey is implemented to this measurement point Ai.
Described angle α i is via formula
calculate.
In practice, first is carried out to the described measurement point of flow measurement, described horizontal rotation angle is tried to achieve towards the described angle obtained with the described measurement point carrying out flow measurement for this first based on the initial level of described radar measurement instrument; For measurement point described in other, described horizontal rotation angle is tried to achieve based on the described angle obtained respectively for current described measurement point and a upper described measurement point.
Described vertical dip angle β i is via formula
try to achieve.
Preferably, described radar measurement instrument comprises flow measurement casing, the front end of this flow measurement casing is provided with radar Doppler flow sensor, camera, flow measurement control circuit is provided with in this flow measurement casing, this flow measurement control circuit comprises microprocessor, obliquity sensor, this flow measurement casing is movably arranged on via inclination angle adjustor and horizontally rotates on device, this horizontally rotates device and is placed on base, and this inclination angle adjustor, this horizontally rotates device, this radar Doppler flow sensor, this camera, this obliquity sensor are connected with this microprocessor.
In practice, the sea level elevation of the current level of described measurement point is known by the liquid level sensor that described radar measurement instrument is installed, or described radar measurement instrument receives the sea level elevation of the current level of described measurement point by wireless transmission circuit.
In practice, the current inclination of described radar measurement instrument records via described obliquity sensor.
Advantage of the present invention is:
The inventive method is only based on a radar measurement instrument, just the operation of multiple spot flow measurement can be realized to measurement point multiple on same river cross-section towards adjustment and vertical dip angle adjustment by level, wherein, the skew on the water surface of the river cross-section that to rise because of river water level or decline and cause is eliminated to measuring the deviation brought by vertical dip angle regulative mode to the flow measurement of each measurement point, and horizontally rotate the arc deviation caused, ensure that radar measurement instrument carries out flow measurement based on same river cross-section all the time.The inventive method flow measurement speed is fast, flow measurement result is accurate, reliably, multiple spot flow measurement result truly can reflect the flow condition of river cross-section.
Accompanying drawing explanation
Fig. 1 is the existing key diagram fixing flow measurement method implemented based on hard-wired measurement instrument.
Fig. 2 is the implementing procedure figure of the inventive method.
Fig. 3 is the key diagram of sea level elevation H and the vertical range w apart from river cross-section to be measured thereof residing for radar measurement instrument in the inventive method.
Fig. 4 is the key diagram of n the measurement point in the inventive method, river cross-section to be measured carrying out in advance flow measurement.
Fig. 5 be when flow measurement carrying out to measurement point Ai in the inventive method angle α i and vertical dip angle β i ask for key diagram.
Fig. 6 is an instance graph of radar measurement instrument.
Fig. 7 is the composition frame chart of the flow measurement control circuit of radar measurement instrument.
Embodiment
The river cross-section multiple spot flow measurement method that the present invention is based on point of fixity realizes based on a radar measurement instrument (i.e. point of fixity) hard-wired above river course, the installation site of this radar measurement instrument can set flexibly, such as, can be arranged on the center in river course, limit, river course or on a certain position in river course.This radar measurement instrument by horizontally rotate its level of adjustable towards (level towards refer to radar measurement instrument based on the rotation in surface level towards direction), to realize carrying out flow measurement to the multiple measurement points on same river cross-section, in practice, the height of water level of the plurality of measurement point on same river cross-section may be different, and this radar measurement instrument is based on SEA LEVEL VARIATION adjustable vertical dip angle, and (vertical dip angle refers to the angle between the detection direction of radar measurement instrument and himself place vertical direction, vertical dip angle be radar measurement instrument indulge at self detection direction place plane internal rotation turn obtain), to ensure to carry out flow measurement based on same river cross-section all the time.
As Fig. 2, the river cross-section multiple spot flow measurement method that the present invention is based on point of fixity comprises the steps:
Step 1: according to the fixed installation position of this radar measurement instrument 20, obtains this sea level elevation H residing for radar measurement instrument 20 and this radar measurement instrument 20 vertical range w (as Fig. 3) apart from river cross-section to be measured;
Step 2: set to the measurement point of the n on river cross-section to be measured (n be greater than 1 positive integer) carry out flow measurement, measure the distance obtaining the reference point O of this measurement point each on river cross-section, such as, as Fig. 4, assuming that will to the n on river cross-section to be measured measurement point A1, A2, A3 ..., An carries out flow measurement, this measurement point A1, A2, A3 ..., An respectively apart from the distance of reference point O be 11,12,13 ..., 1n;
Step 3: order (such as from the measurement point of river cross-section one end to the measurement point of the river cross-section other end carry out order flow measurement) carries out flow measurement, i=1,2 to n measurement point Ai successively, n, wherein, comprises the steps: the flow measurement of this measurement point each
Step a: based on this measurement point Ai apart from the distance 1i of this reference point O and this vertical range w, obtain the subpoint 20 ' of this radar measurement instrument 20 on the water surface respectively and this measurement point Ai, reference point O line between angle α i (as Fig. 5), thus calculate horizontal rotation angle based on this angle α i, carry out horizontal rotary to make this radar measurement instrument 20 based on this horizontal rotation angle and transfer towards the direction at this measurement point Ai place;
Step b: the sea level elevation hsi of the sea level elevation H residing for this radar measurement instrument 20 and current level is subtracted each other, try to achieve the vertical height hi of this radar measurement instrument 20 apart from the current water surface, i.e. hi=H-hsi, thus based on this vertical height hi and this radar measurement instrument 20 subpoint 20 ' on the water surface and the distance between this measurement point Ai
try to achieve vertical dip angle β i (as Fig. 5), so this radar measurement instrument 20 based on this vertical dip angle β i and current inclination carrying out vertical rotation, to make the detection direction of this radar measurement instrument 20 just to this measurement point Ai in the vertical plane (the vertical plane that in as Fig. 5, radar measurement instrument 20, subpoint 20 ' are formed with measurement point Ai) of this measurement point Ai;
Step c: fluid-velocity survey is implemented to this measurement point Ai.
After n the whole flow measurement of measurement point, namely complete the multiple spot flow measurement operation on same river cross-section.
In the present invention, sea level elevation H refers to the vertical height of radar measurement instrument 20 apart from benchmark sea level, reference point O refers to the perpendicular intersection of this radar measurement instrument 20 and the river cross-section place to be measured water surface, and the sea level elevation of current level refers to the vertical height of the current water surface apart from benchmark sea level.In practice, measure these data of sea level elevation H, distance 1i and vertical range w obtained to need to be input in radar measurement instrument 20.
In the present invention, the water surface setting river course is level.In the present invention, when calculating or the distance between instrumentation radar measurement instrument 20 and other position, radar measurement instrument 20 is considered as any to calculate.
In actual flow measurement, angle α i is via formula
calculate, wherein, 1i is the distance of this measurement point Ai apart from this reference point O, and w is the vertical range of radar measurement instrument 20 apart from river cross-section to be measured.
In actual flow measurement, first is carried out to the measurement point A1 of flow measurement, horizontal rotation angle is tried to achieve towards the angle α 1 obtained with the measurement point A1 carrying out flow measurement for this first based on the initial level of radar measurement instrument 20, such as, if the initial level of radar measurement instrument 20 is oriented vertical with river cross-section, then horizontal rotation angle is the angle α 1 that the measurement point A1 that carries out flow measurement for this first obtains.For other measurement point, horizontal rotation angle is tried to achieve based on the angle obtained respectively for current measurement point and a upper measurement point, if current measurement point and a upper measurement point are positioned at the homonymy of reference point O, then the angle obtained for current measurement point and the angle obtained for a upper measurement point are subtracted each other and ask absolute value, thus obtain horizontal rotation angle, if current measurement point and a upper measurement point are positioned at the heteropleural of reference point O, then the angle obtained for current measurement point are added with the angle obtained for a upper measurement point and namely obtain horizontal rotation angle.
In actual flow measurement, vertical dip angle β i is via formula
try to achieve.
The inventive method can realize based on following radar measurement instrument, as Fig. 6 to Fig. 7, this radar measurement instrument 20 comprises flow measurement casing 201, the front end of this flow measurement casing 201 is provided with radar Doppler flow sensor 104, camera 102, this radar Doppler flow sensor 104 is for detecting flow rate of water flow, this camera 102 is for taking the real scene of record measurement point, flow measurement control circuit is provided with in this flow measurement casing 201, this flow measurement control circuit comprises microprocessor 101, obliquity sensor 103, this obliquity sensor 103 is for the true inclination angle of this flow measurement casing 201 of perception, to correct the attitude of flow measurement casing 201 in real time, this flow measurement casing 201 is movably arranged on via inclination angle adjustor 202 and horizontally rotates on device 203, this horizontally rotates device 203 and is placed on base 204, the control port of this inclination angle adjustor 202, this horizontally rotates the control port of device 203, the signal port of this radar Doppler flow sensor 104, the signal port of this camera 102, the signal port of this obliquity sensor 103 is connected with the corresponding signal port of this microprocessor 101 respectively.
As Fig. 7, this flow measurement control circuit also can comprise wireless transmission circuit 109, and the communication signal transmit port of this wireless transmission circuit 109 is connected with the corresponding signal port of microprocessor 101.GSM card, CDMA card or WCDMA address card that this wireless transmission circuit 109 provides built with communication company of China Mobile, Chinese associating communication company or China Telecom, this wireless transmission circuit 109, by the communication modes such as note, 3G, 4G, via sky alignment control center reported data, receives instruction and realizes remote on-off, auto-update firmware etc.
As Fig. 7, this flow measurement control circuit also can comprise indicator light circuit 111, and the signal port of this indicator light circuit 111 is connected with the corresponding signal port of microprocessor 101.This indicator light circuit 111 can comprise multiple pilot lamp (such as: run indicator, communication pilot lamp, cell voltage alarm indicator etc.), and the terminals of each pilot lamp are connected with the corresponding I/O end of microprocessor 101 respectively via pilot lamp control interface.
As Fig. 7, this flow measurement control circuit also can be provided with clock circuit 114, switch 110, and clock circuit 114 provides accurate clock signal for microprocessor 101, and switch 110 is for controlling open and close of the present invention.
In actual design, horizontally rotate device 203 to comprise being located at base 204 horizontally rotates DC brushless motor 108, this transmission shaft horizontally rotating DC brushless motor 108 is vertically settled and the reduction gearing that it the is installed linkage gear toe joint that be connected inner with rotational shell, this rotational shell is movably installed with inclination angle adjustor 202, this control signal port horizontally rotating DC brushless motor 108 is connected with the corresponding signal port of microprocessor 101 via electric machine controller 107.When reality uses, by the operation of electric machine controller 107 level of control rotary DC brushless electric machine 108, the transmission shaft horizontally rotating DC brushless motor 108 is made to drive reduction gearing to rotate, thus reduction gearing driven rotary shell rotates, realize horizontally rotating of flow measurement casing 201, namely realize the level of radar Doppler flow sensor 104 towards adjustment.In practice, this horizontally rotates device 203 for horizontally rotating flow measurement casing 201, and cooperation inclination angle adjustor 202, realizes radar Doppler flow sensor 104 and camera 102 is swept the rotation of the multiple measurement points on same river cross-section.It should be noted that, horizontally rotating device 203 also can have other to construct, and is not limited to above-mentioned.
In actual design, inclination angle adjustor 202 comprises turning axle, one end of this turning axle is provided with linkage gear, the reduction gearing toe joint that the transmission shaft of this linkage gear and tilt adjustment DC brushless motor 106 is installed, the other end of this turning axle is rotatably connected with rotational shell via pulley, flow measurement casing 201 is fixedly mounted on this turning axle, and the control signal port of this tilt adjustment DC brushless motor 106 is connected with the corresponding signal port of microprocessor 101 via electric machine controller 105.When reality uses, the operation of tilt adjustment DC brushless motor 106 is controlled by electric machine controller 105, the transmission shaft of tilt adjustment DC brushless motor 106 is made to drive reduction gearing to rotate, thus reduction gearing driven rotary axle rotates, realize regulating the vertical dip angle of flow measurement casing 201, namely realize the adjustment to radar Doppler flow sensor 104 vertical dip angle (irradiation inclination angle).In practice, the vertical dip angle of inclination angle adjustor 202 regulates object to be, reduce to horizontally rotate because of flow measurement casing 201 the arc deviation caused, and eliminate to rise because of river water level or the river cross-section that the causes skew on the water surface that declines to measuring the deviation brought, radar Doppler flow sensor 104 can be radiated on the water surface of same river cross-section all the time, ensure to carry out flow measurement based on same river cross-section all the time.It should be noted that, inclination angle adjustor 202 also can have other to construct, and is not limited to above-mentioned.
In radar measurement instrument 20 shown in Fig. 6 to Fig. 7, radar Doppler flow sensor 104, obliquity sensor 103, electric machine controller 105 and 107, wireless transmission circuit 109, indicator light circuit 111, clock circuit 114, inclination angle adjustor 202, horizontally rotate device 203 etc. and be the existing of this area or know device or circuit, therefore it specifically forms and does not here describe in detail.
According to the radar measurement instrument 20 shown in Fig. 6 to Fig. 7, then in the methods of the invention, the sea level elevation of the current level of measurement point is known by the liquid level sensor (not shown) that radar measurement instrument 20 is installed, or radar measurement instrument 20 receives the sea level elevation of the current level of measurement point by wireless transmission circuit 109, and the current inclination of radar measurement instrument 20 can record via obliquity sensor 103.
According to the radar measurement instrument 20 shown in Fig. 6 to Fig. 7, then in the present invention, radar measurement instrument 20 level towards adjustment namely refer to the level that transfers the flow measurement casing 201 on adjustment radar measurement instrument 20 by horizontal rotary towards, namely the adjustment of radar measurement instrument 20 vertical dip angle refers to the vertical dip angle being adjusted the flow measurement casing 201 on radar measurement instrument 20 by vertical rotation in vertical plane.And the level of flow measurement casing 201 be that is to say the level of the detecting head on radar Doppler flow sensor 104 towards the adjustment with vertical dip angle towards the adjustment with vertical dip angle, and final purpose of the present invention makes detecting head (detection direction) on radar Doppler flow sensor 104 just to measurement point, to carry out flow measurement to measurement point.
It should be noted that and be not limited to the radar measurement instrument 20 shown in Fig. 6 to Fig. 7 by the radar measurement instrument that the inventive method also can adopt other and constructs.
Advantage of the present invention is:
The inventive method is only based on a radar measurement instrument, just the operation of multiple spot flow measurement can be realized to measurement point multiple on same river cross-section towards adjustment and vertical dip angle adjustment by level, wherein, the skew on the water surface of the river cross-section that to rise because of river water level or decline and cause is eliminated to measuring the deviation brought by vertical dip angle regulative mode to the flow measurement of each measurement point, and horizontally rotate the arc deviation caused, ensure that radar measurement instrument carries out flow measurement based on same river cross-section all the time.The inventive method flow measurement speed is fast, flow measurement result is accurate, reliably, multiple spot flow measurement result truly can reflect the flow condition of river cross-section.
The above know-why being preferred embodiment of the present invention and using; for a person skilled in the art; when not deviating from the spirit and scope of the present invention; any based on apparent changes such as the equivalent transformation on technical solution of the present invention basis, simple replacements, all belong within scope.
Claims (5)
1. the river cross-section multiple spot flow measurement method based on point of fixity, the method realizes based on a radar measurement instrument hard-wired above river course, this radar measurement instrument by horizontally rotate adjustable level towards, to realize carrying out flow measurement to the multiple measurement points on same river cross-section, and this radar measurement instrument is based on SEA LEVEL VARIATION adjustable vertical dip angle, to ensure to carry out flow measurement based on same river cross-section all the time, it is characterized in that, the method comprises the steps:
Step 1: according to the fixed installation position of this radar measurement instrument, obtains this sea level elevation H residing for radar measurement instrument and this radar measurement instrument vertical range w apart from river cross-section to be measured;
Step 2: set and carry out flow measurement to the measurement point of the n on river cross-section to be measured, measures the distance obtaining the reference point O of this measurement point each on river cross-section;
Step 3: order carries out flow measurement, i=1,2 to n measurement point Ai successively ..., n, wherein, comprises the steps: the flow measurement of this measurement point each
Step a: based on this measurement point Ai apart from the distance li of this reference point O and this vertical range w, obtain the subpoint of this radar measurement instrument on the water surface respectively and this measurement point Ai, reference point O line between angle α i, thus calculate horizontal rotation angle based on this angle α i, carrying out horizontal rotary to make this radar measurement instrument based on this horizontal rotation angle transfers towards the direction at this measurement point Ai place, wherein, this angle α i is via formula
Calculate;
Step b: the sea level elevation hsi of the sea level elevation H residing for this radar measurement instrument and current level is subtracted each other, try to achieve the vertical height hi of this radar measurement instrument apart from the current water surface, thus based on this vertical height hi and this radar measurement instrument the subpoint on the water surface and the distance Li between this measurement point Ai, try to achieve vertical dip angle β i, so this radar measurement instrument carries out vertical rotation based on this vertical dip angle β i and current inclination in the vertical plane towards this measurement point Ai, to make the detection direction of this radar measurement instrument just to this measurement point Ai, wherein, this vertical dip angle β i is via formula
try to achieve,
Step c: fluid-velocity survey is implemented to this measurement point Ai.
2. river cross-section multiple spot flow measurement method as claimed in claim 1, is characterized in that:
First is carried out to the described measurement point of flow measurement, described horizontal rotation angle is tried to achieve towards the described angle obtained with the described measurement point carrying out flow measurement for this first based on the initial level of described radar measurement instrument;
For measurement point described in other, described horizontal rotation angle is tried to achieve based on the described angle obtained respectively for current described measurement point and a upper described measurement point.
3. river cross-section multiple spot flow measurement method as claimed in claim 1 or 2, is characterized in that:
Described radar measurement instrument comprises flow measurement casing, the front end of this flow measurement casing is provided with radar Doppler flow sensor, camera, flow measurement control circuit is provided with in this flow measurement casing, this flow measurement control circuit comprises microprocessor, obliquity sensor, this flow measurement casing is movably arranged on via inclination angle adjustor and horizontally rotates on device, this horizontally rotates device and is placed on base, and this inclination angle adjustor, this horizontally rotates device, this radar Doppler flow sensor, this camera, this obliquity sensor are connected with this microprocessor.
4. river cross-section multiple spot flow measurement method as claimed in claim 3, is characterized in that:
The sea level elevation of the current level of described measurement point is known by the liquid level sensor that described radar measurement instrument is installed, or described radar measurement instrument receives the sea level elevation of the current level of described measurement point by wireless transmission circuit.
5. river cross-section multiple spot flow measurement method as claimed in claim 3, is characterized in that:
The current inclination of described radar measurement instrument records via described obliquity sensor.
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| US10408648B2 (en) | 2016-06-30 | 2019-09-10 | Hach Company | Flow meter with adaptable beam characteristics |
| CN107860432A (en) * | 2017-12-08 | 2018-03-30 | 北京奥特美克科技股份有限公司 | A kind of flow measurement device and method |
| CN108107234A (en) * | 2018-01-19 | 2018-06-01 | 昆明理工大学 | Water surface flow rate detection system and its detection method under a kind of high water condition |
| CN108168635A (en) * | 2018-01-31 | 2018-06-15 | 长江水利委员会水文局 | Discharge of river realtime on-line monitoring method and device |
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