阅读说明：本技术 一种自调节式流速测量仪及测量方法 (Self-adjusting flow velocity measuring instrument and measuring method ) 是由 徐波 付国丛 陆伟刚 徐磊 王丰 周秉南 于佳敏 王琳 于 2020-12-08 设计创作，主要内容包括：本发明属于水利工程设备及机械结构领域,具体涉及一种自调节式流速测量仪及测量方法。包括测流构件、上座板、浮体、伸缩杆、下底板、刻度长板、红外摄像头、锚固杆；伸缩杆连接着上座板和下底板,浮体提供浮力带动上座板随水位一起浮动；测流构件可调节,测流旋桨位置固定时测量水面下定距离位置的流速,当水位不变时调节测流旋桨的位置可以测量不同水深的流速；红外摄像头用于读取流速和水位,在夜间也能正常工作；锚固杆用于增加仪器在水中的稳定性。该流速测量仪测量方便投入人力低,部件用螺栓连接可拆卸方便携带,并且应对不同测流情况可以更换适应的构件。(The invention belongs to the field of hydraulic engineering equipment and mechanical structures, and particularly relates to a self-adjusting flow velocity measuring instrument and a measuring method. The device comprises a flow measuring component, an upper seat plate, a floating body, a telescopic rod, a lower bottom plate, a scale long plate, an infrared camera and an anchoring rod; the telescopic rod is connected with the upper seat plate and the lower seat plate, and the floating body provides buoyancy to drive the upper seat plate to float along with the water level; the flow measuring component is adjustable, the flow velocity at a fixed distance position below the water surface is measured when the position of the flow measuring propeller is fixed, and the flow velocity at different water depths can be measured by adjusting the position of the flow measuring propeller when the water level is not changed; the infrared camera is used for reading the flow rate and the water level and can work normally at night; the anchor rods are used to increase the stability of the instrument in water. The flow velocity measuring instrument is convenient to measure, low in manpower input, detachable and convenient to carry through bolted connection, and adaptive components can be replaced according to different flow measuring conditions.)

1. A self-adjusting flow velocity measuring instrument is characterized by comprising a positioning table and a flow measuring component arranged on the positioning table;

the flow measuring component comprises a laser transmitter (12), a flow measuring rotary propeller (14) and a laser receiver (19) arranged on the flow measuring rotary propeller (14), and the position of the flow measuring rotary propeller (14) under water is remotely adjustable;

the positioning table enables the flow measuring component to automatically lift along with the water level, and the flow velocity of the position with a fixed distance below the water surface can be measured.

2. The surveying instrument according to claim 1, characterized in that the positioning table comprises an upper seat plate (2), a lower base plate (5), a telescopic rod (4) and a floating body (3);

be equipped with telescopic link (4) between upper seat board (2) and lower plate (5), body (3) set up in the periphery of upper seat board (2) under the combined action of telescopic link (4) and body (3) for the current surveying component can be along with water level automatic rising, and can measure the velocity of flow of fixed distance position under the surface of water.

3. The measuring instrument as claimed in claim 2, wherein the upper seat plate (2) comprises an upper plate and a lower plate, the upper plate and the lower plate are connected through thick leveling screws (20), the upper plate is provided with horizontal calibration air bubbles (22), and the periphery of the upper plate is uniformly provided with a plurality of thin leveling screws (21); the upper plate and the lower plate are both provided with through holes, the laser emitter (12) is arranged on the lower surface of the upper plate and emits laser relative to the center hole of the lower plate, and the floating body (3) is arranged on the periphery of the lower plate of the upper seat plate (2).

4. The measuring instrument according to claim 3, characterized in that the flow measuring member further comprises a flow velocity display screen (11) and an adjustable flow measuring lever (13); the flow measuring rotary paddle (14) comprises a paddle (24) and a rotating rod (25), and the laser receiver (19) is arranged on the rotating rod (25); the flow rate display screen (11) is electrically connected with the laser emitter (12), and the flow rate display screen (11) is arranged on the upper portion of the upper plate.

5. The measuring instrument according to claim 4, characterized in that the flow measuring rod (13) comprises an electric motor (15), a drive belt (16), a geared slide rail (17) and a slide gear (18);

the motor (15) is arranged above the lower plate, the gear type slide rail (17) comprises two opposite plates and two rows of gears arranged on the plates, and the gears of the gear type slide rail (17) are meshed with the sliding gears (18); the sliding gear (18) is connected with a rotating rod (25) of the flow measuring propeller through a bearing (23); the gear type slide rails (17) can be disassembled, and the gear type slide rails with different lengths can be replaced according to the requirements of different flow measuring conditions before work;

the motor (15) is controlled to be opened and closed by remote control, the motor (15) drives the gears on two sides in the gear type sliding rail (17) to rotate through the transmission belt (16), and the gears on two sides drive the sliding gear (18) to move up and down through transmission, so that the position of the flow measuring rotary propeller (14) is adjusted up and down.

6. The measuring instrument according to claim 5, characterized in that the motor (15) is provided with a timing device for controlling the distance of the ascent and descent of the current measuring propeller (14), the distance of the descent or ascent of the current measuring propeller is 0.3m each time the motor (15) is turned on, and the timing device automatically cuts off the motor from rotating when the distance of the descent or ascent of the current measuring propeller reaches 0.3 m; the distance of the flow measuring propeller ascending or descending once the motor is started can be adjusted by a timer before flow measuring.

7. The measuring instrument according to claim 6, characterized in that the telescopic rod (4) is multi-section, and a section of rubber ring is arranged at the tail end of the telescopic rod of the previous stage to increase the telescopic resistance of the telescopic rod;

the floating body (3) is of a spherical structure and is connected with the upper seat plate (2) through bolts to provide buoyancy for the upper seat plate, so that the floating body can float up and down along with the water level, the floating body (3) adopts reinforced plastics as a shell, foam is filled in the floating body, the size of the floating body (3) is determined through tests, and when the floating body (3) is submerged by half, a component just keeps balance in the water.

8. The measuring instrument according to claim 7, characterized in that the upper plate is detachably connected with an infrared camera (8) through a connecting rod, and the infrared camera is independently powered by a storage battery;

the lower plate is detachably connected with a square loop bar (7) through a connecting rod, the lower bottom plate (5) is detachably connected with a scale long plate (6) through a connecting rod, and the square loop bar (7) is sleeved on the scale long plate (6).

9. The measuring instrument according to claim 8, characterized in that it further comprises anchoring means comprising an anchoring aiming ring (10) detachably connected to the lower plate of the upper deck, and an anchoring fork (9) located in a sleeve on the lower deck (5), the anchoring fork (9) in the sleeve being pushed into the canal or river bottom by the anchoring aiming ring (10) with a rod during operation.

10. A method of flow rate measurement using the meter of claim 9, comprising the steps of:

step (1): before the flow measurement work, the height of a flow measurement propeller (14) and the working height of an upper seat plate (2) are adjusted according to the water depth of a measurement position, a flow measurement component is placed, and an infrared camera (8) and a floating body (3) are fixed;

step (2): the whole measuring instrument is placed at a position to be measured, the lower base plate (5) sinks to the bottom of a channel or a river channel during operation, the anchoring fork rod (9) is pushed into soil at the bottom of the channel or the bottom of the river by a rod for anchoring, and the upper base plate (2) is leveled by a coarse leveling screw (20) and a fine leveling screw (21);

and (3): the floating body (3) submerges half of the component when the component starts to operate, and the generated buoyancy just maintains the upper seat plate (2) to float on the water surface; when the water level rises, the submerging volume of the floating body (3) is increased, the generated buoyancy is increased, the telescopic rod (4) begins to slowly extend due to the buffer resistance of the rubber ring, the upper seat plate (2) begins to float upwards, and when the position to be measured is reached, the flow velocity of the flow velocity display screen (11) and the water level on the scale long plate (6) are read through the infrared camera (8) and recorded;

and (4): when the measuring depth is required to be changed, the motor (5) can be remotely controlled to be started, the flow measuring propeller (14) moves, and the lifting range of the flow measuring propeller (14) is the length of the gear type sliding rail (17).

Technical Field

The invention belongs to the field of hydraulic engineering equipment and mechanical structures, and particularly relates to a self-adjusting flow velocity measuring instrument and a measuring method.

Background

In recent years, due to the strong support of the country to the water conservancy industry and the rapid development of the water conservancy industry, the technology for measuring the flow of the open channel is also rapidly developed.

In China, an open channel flow measuring device starts late, in recent years, with the progress of science and technology and the rapid development of the water conservancy industry, the river section is gradually replaced by the original manual flow measuring mode through automatic flow measuring, various automatic section flow measuring devices appear in the market, and the automatic section flow measuring devices can be divided into probing type automatic measuring devices and non-probing type automatic measuring devices through measuring modes. The device for measuring the flow of the non-probing cross section measures the surface flow field in a radar wave mode and is applied to the measurement of a standard river channel with small change of the cross section of the river channel or no siltation. The exploration type measurement mode mainly adopts a mode that a cableway or a survey bridge spans a river channel section, and the acquisition equipment is placed down to explore into water for contact type measurement.

At present, no matter cableway measurement or bridge measurement is used for measuring the flow of a river channel section, the accurate water depth of each perpendicular line of the section is required to be measured, and the flow velocity measurement is carried out by utilizing a water depth measurement flow measurement point, so that the average flow velocity of the perpendicular line is calculated. Therefore, accurate measurement of the vertical water depth is critical. The existing sounding type measuring equipment has the defects that the water depth measurement precision is low due to the inclination of a vehicle body caused by water flow impact and the deflection angle of a bearing cable, so that the flow measurement precision is not high, and the error is large when the flow velocity is large. In conclusion, the current channel and river channel center flow measurement is inconvenient and the flow measurement workload is large, and the labor intensity is high.

Disclosure of Invention

The invention aims to provide a self-adjusting flow velocity measuring instrument and a measuring method, and provides a simple flow measuring structure capable of automatically lifting along with water level, which can measure the change condition of the flow velocity of the fixed water depth under the water surface when the water level in a channel and a river changes, realize self-adjusting flow velocity measurement and observe the change of the water level at the same time.

The technical solution for realizing the purpose of the invention is as follows: a self-adjusting flow rate meter comprising: the flow measuring device comprises a positioning table and a flow measuring component arranged on the positioning table;

the flow measuring component comprises a laser transmitter, a flow measuring rotary paddle and a laser receiver arranged on the flow measuring rotary paddle, and the position of the flow measuring rotary paddle under water is remotely adjustable;

the positioning table enables the flow measuring component to automatically lift along with the water level, and the flow velocity of the position with a fixed distance below the water surface can be measured.

Furthermore, the positioning table comprises an upper seat plate, a lower seat plate, a telescopic rod and a floating body;

the telescopic rod is arranged between the upper seat plate and the lower seat plate, the floating body is arranged at the periphery of the upper seat plate, and under the combined action of the telescopic rod and the floating body, the flow measuring component can automatically lift along with the water level, and the flow speed of a fixed distance position under the water surface can be measured.

Furthermore, the upper seat plate comprises an upper plate and a lower plate, the upper plate and the lower plate are connected through coarse adjustment flat screws, horizontal calibration bubbles are arranged on the upper plate, and a plurality of fine leveling screws are uniformly distributed on the periphery of the upper plate; the upper plate and the lower plate are provided with through holes, the laser transmitter is arranged on the lower surface of the upper plate, and the floating body is arranged on the periphery of the lower plate of the upper seat plate.

Furthermore, the flow measuring component also comprises a flow speed display screen and an adjustable flow measuring rod; the flow measuring rotary paddle comprises a paddle and a rotating rod, and the laser receiver is arranged on the rotating rod; the flow rate display screen is electrically connected with the laser emitter and is arranged on the upper part of the upper plate.

Furthermore, the flow measuring rod comprises a motor, a transmission belt, a gear type slide rail and a sliding gear;

the motor is arranged above the lower plate, the gear type slide rail comprises two opposite plates and two rows of gears arranged on the plates, and the gears of the gear type slide rail are meshed with the sliding gears; the sliding gear is connected with a rotating rod of the flow measuring propeller through a bearing; the gear type slide rails can be disassembled, and the gear type slide rails with different lengths can be replaced according to the requirements of different flow measuring conditions before work;

the motor is controlled by remote control to be opened and closed, the motor drives the gears on two sides in the gear type slide rail to rotate through the transmission belt, and the gears on two sides drive the sliding gear to move up and down through the transmission action, so that the up-and-down adjustment of the position of the flow measuring rotary propeller is realized.

Furthermore, a timing device is arranged on the motor and used for controlling the ascending and descending distance of the flow measurement propeller, the descending or ascending distance of the flow measurement propeller is 0.3m when the motor is started every time, and the timing device can automatically cut off the motor to stop rotating when the descending or ascending distance of the flow measurement propeller reaches 0.3 m; the distance of the flow measuring propeller ascending or descending once the motor is started can be adjusted by a timer before flow measuring.

Furthermore, the telescopic rod is in a multi-section type, and a section of rubber ring is arranged at the tail end of the telescopic rod at the previous stage to increase the telescopic resistance of the telescopic rod;

the floating body is of a spherical structure and is connected to the upper seat plate through bolts to provide buoyancy for the upper seat plate, so that the floating body can float up and down along with the water level, the floating body is made of reinforced plastic and filled with foam, the size of the floating body is determined through tests, and when the floating body is submerged half, the component just keeps balance in the water.

Furthermore, the upper plate is detachably connected with an infrared camera through a connecting rod, and the infrared camera is independently powered by a storage battery;

the upper plate can be dismantled through the connecting rod and be connected with square loop bar, the lower plate can be dismantled through the connecting rod and be connected with the scale long slab, square loop bar cover is established on the scale long slab.

Furthermore, the anchoring device comprises two parts, one part is an anchoring aiming ring detachably connected with the lower plate of the upper seat plate, the other part is an anchoring fork rod positioned in a sleeve on the lower bottom plate, and the rod pushes the anchoring fork rod in the sleeve into the bottom of a canal or a river through the anchoring aiming ring during operation.

A method for measuring flow velocity by using the measuring instrument comprises the following steps:

step (1): before the flow measurement work, the height of the flow measurement propeller and the working height of the upper seat plate are adjusted according to the water depth of the measurement position, a flow measurement component is placed, and an infrared camera and a floating body are fixed;

step (2): the whole measuring instrument is placed at a position to be measured, a lower bottom plate sinks to the bottom of a channel or a river channel during operation, an anchoring fork rod is pushed into soil at the bottom of the channel or the bottom of the river by a rod for anchoring, and an upper seat plate is leveled by a coarse leveling screw and a fine leveling screw;

and (3): the floating body submerges half of the component when the component starts to operate, and the generated buoyancy just maintains the upper seat plate to float on the water surface; when the water level rises, the submerging volume of the floating body is increased, the generated buoyancy is increased, the telescopic rod begins to slowly extend due to the buffer resistance of the rubber ring, the upper seat plate begins to float upwards, and when the position to be measured is reached, the flow velocity of the flow velocity display screen and the water level on the scale long plate are read through the infrared camera and recorded;

and (4): when wanting to change the measurement degree of depth, can remote control motor open, the rotational propeller that flows is removed, and the rotational propeller that flows goes up and down the scope is the length of gear formula slide rail.

Compared with the prior art, the invention has the remarkable advantages that:

1. the structure is simple, the operation is simple and convenient, most of the components are connected by bolts and are convenient to disassemble and carry, and the components such as the flow measuring rod, the telescopic rod, the scale long plate and the like can be replaced to meet the flow measuring requirements of different scenes when the different flow measuring requirements are met;

2. the flow measuring component can not only automatically lift and measure the flow velocity at a fixed distance position under the water surface along with the water level, but also can remotely adjust the position of the flow measuring propeller, and compared with the traditional flow measuring instrument, the flow measuring range is wider, and the adjustment of the flow measuring water depth is simpler and more convenient;

3. the instrument is fixedly arranged in the channel or the river channel, so that the problem of inconvenience in measurement in the middle of the channel and the river channel is solved, remote measurement can be performed at any time, after the instrument is placed, a person does not need to nurse nearby components, reading operation can be completed on the shore, and time and labor are saved;

4. the flow measuring device is convenient to measure flow, high in measuring accuracy and good in stability, and can effectively avoid the problem that the accuracy of the flow measuring instrument is influenced due to the fact that the flow measuring instrument deflects.

Drawings

Fig. 1 is a schematic structural view of a flow rate measuring instrument according to the present invention.

Fig. 2 is a schematic structural view of a flow measurement member of the present invention.

Fig. 3 is a schematic view of the structure of the flow measuring rod of the present invention.

Fig. 4 is a schematic diagram of the upper seat structure of the present invention.

Fig. 5 is a schematic structural view of the flow rate measuring instrument according to the present invention in a contracted state when not in operation.

FIG. 6 is a schematic view of the connection between the sliding gear and the flow measuring rotary vane.

Description of reference numerals:

1-flow measuring component, 2-upper seat plate, 3-floating body, 4-telescopic rod, 5-lower bottom plate, 6-scale long plate, 7-square lantern ring, 8-infrared camera, 9-anchoring fork rod, 10-anchoring aiming ring, 11-flow rate display screen, 12-laser emitter, 13-flow measuring rod, 14-flow measuring rotary propeller, 15-motor, 16-driving belt, 17-gear type sliding rail, 18-sliding gear, 19-laser receiver, 20-coarse leveling screw, 21-fine leveling screw, 22-horizontal calibration bubble, 23-bearing, 24-paddle and 25-rotating rod.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 to 6, the self-adjusting flow rate measuring instrument of the present embodiment includes:

the device comprises a flow measuring component 1, an upper base plate 2, a floating body 3, an expansion link 4, a lower base plate 5, a scale long plate 6, a square lantern ring 7, an infrared camera 8, an anchoring fork rod 9, an anchoring aiming ring 10, a flow rate display screen 11, a laser emitter 12, an adjustable flow measuring rod 13, a flow measuring propeller 14, a motor 15, a transmission belt 16, a gear type slide rail 17, a slide gear 18, a laser receiver 19, a coarse adjustment flat screw 20, a fine adjustment screw 21, a horizontal adjustment bubble 22, a bearing 23, a blade 24 and a rotating rod 25.

The flow measuring component 1 comprises a flow velocity display screen 11, a laser emitter 12, an adjustable flow measuring rod 13 and a flow measuring propeller 14;

the flow rate display screen 11 described above functions to display flow rate data at the measured position.

The laser transmitter 12 is used for calculating the rotating speed of the flow measuring propeller 14 at the measuring position, converting the rotating speed into a flow speed and transmitting the flow speed to the flow speed display screen 11; the laser transmitter 12 is continuously started, a laser signal is transmitted to the laser receiver 19 fixed on the rotating rod of the flow measurement propeller 14, the propeller rotates for a circle, the receiver reflects a signal to the transmitter, the number of times that the transmitter obtains the reflected signal in a period of time is measured and divided by the time to obtain the average rotating speed of the flow measurement propeller 14, the rotating speed is converted into flow speed data through a rotating speed and flow speed relation graph, and the flow speed data is transmitted to the flow speed display screen 11, and the rotating speed and flow speed relation graph is obtained through experiments.

The adjustable flow measuring rod 13 comprises a motor 15, a transmission belt 16, a gear type slide rail 17 and a sliding gear 18; the motor 15 is controlled by remote control to be opened and closed, the gears on two sides in the gear type slide rail 17 are driven to rotate through the transmission belt 16, the gears on two sides drive the sliding gear 18 to move up and down through transmission action, and the sliding gear 18 is fixedly connected with the rotating rod of the current measuring rotary paddle 14 through the bearing 23. The motor 15 is provided with a timing device for controlling the ascending and descending distance of the flow measuring propeller 14, the descending or ascending distance of the flow measuring propeller 14 is 0.3m when the motor 15 is started each time, and the timing device can automatically cut off the motor to stop rotating when the distance reaches 0.3 m. The distance that the flow measuring propeller 14 ascends or descends every time the motor 15 is turned on can be adjusted by a timer before flow measuring. The material of the flow measuring rod is stainless steel.

The above-mentioned flow measuring propeller 14 comprises a blade 24, a rotating rod 25 and a laser receiver 19; the water flow pushes the flow measurement propeller 14 to rotate, the flow measurement propeller 14 drives the rotating rod 25 and the laser receiver 19 to rotate together, and the other end of the rotating rod is connected with the sliding gear 18 through the bearing 23. The material of the paddle 24 and the rotating lever 25 is stainless steel.

The upper seat plate 2 comprises a square lantern ring 7, an anchoring aiming ring 10, a coarse leveling screw 20, a fine leveling screw 21 and a horizontal air bubble 22; the upper seat plate 2 is divided into an upper layer and a lower layer which are connected by a coarse adjustment flat screw 20. The coarse leveling screws 20 are used for primary leveling of the upper seat plate, the fine leveling screws 21 are used for secondary leveling of the upper seat plate, and the horizontal air bubbles 22 are centered through adjustment of the coarse leveling screws 20 and the fine leveling screws 21, so that the upper seat plate 2 is ensured to be in a horizontal state; one end of the square lantern ring is connected with the upper seat plate through a bolt, the other end of the square lantern ring is sleeved on the scale long plate to facilitate reading of the scale long plate, and the numerical value of the top of the lantern ring corresponding to the position of the scale long plate is the water level to be read; the anchoring aiming ring 10 is used for facilitating the rod to push the anchoring fork rod 9 on the lower bottom plate 5 into the canal bottom or the river bottom. The materials of the thick leveling screws 20 and the thin leveling screws 21 are reinforced plastics, and the materials of the upper seat plate 2 and the anchoring aiming ring 10 are stainless steel.

Foretell body 3 is spherical structure, through the below of bolt fastening at last bedplate lower floor, and bedplate 2 floats from top to bottom along with the water level on the buoyancy support of body 3, and the size of body 3 is confirmed through the experiment, and the buoyancy that body 3 provided keeps balance with the total floating weight of component when the water logging does not have half of body. The floating body 3 is made of light plastic.

The two ends of the telescopic rod 4 are respectively connected with the upper seat plate 2 and the lower seat plate 5 through bolts, and the upper seat plate 2 is ensured not to vertically shake due to the washing of water flow when the upper seat plate 2 floats up and down along with the water level. The telescopic link is formed by 4 sections of member bars combination, and the diameter of 4 member bars is degressive step by step, and in the preceding level member bar can contract to the next level member bar, one section rubber circle was increased to the end of preceding level member bar, the purpose was to increase the flexible resistance between preceding level member bar and the next level member bar, played the cushioning effect and made the bedplate 2 can not float from top to bottom because of the slight change of water level. When the operation starts, the buoyancy and the total buoyancy weight of the component keep balance, when the water level rises, the buoyancy of the floating body 3 is continuously submerged and increased, the increased buoyancy is larger than the resistance of the telescopic rod, and the telescopic rod starts to rise slowly. The telescopic rod is made of stainless steel.

The lower plate 5 described above serves to provide gravity to allow the entire structure to remain stable in the water without being washed away by the water flow. The lower bottom plate 5 is made of concrete material.

Above-mentioned scale long slab 6 is used for the measurement of water level, and the scale of mark has the standard on the scale long slab 6, when reading the velocity of flow on the velocity of flow display screen 11, can read out corresponding water level from the scale long slab to can obtain the velocity of flow and the water level variation relation of relevant position.

The infrared camera 8 is used for reading the flow rate of the flow rate display screen 11 and the water level on the scale long plate 6; the infrared camera 8 is independently powered by a battery, can normally work at night, and can be remotely controlled by a mobile phone to adjust the position of the camera.

The use method of the self-adjusting flow rate measuring instrument comprises the following 2 conditions:

1. measuring the change of the flow velocity of the fixed distance position under the water surface along with the water level

(1) Before the flow measurement work, the height of the flow measurement propeller 14 and the working height of the upper seat plate 2 are adjusted according to the water depth of the measurement position, and the infrared camera 8 and the floating body 3 are fixed by the flow measurement component 1.

(2) The whole instrument is placed at a position to be measured, the lower bottom plate 5 sinks to the bottom of a channel or a river channel during operation, the anchoring fork rod 9 is pushed into the bottom of the channel or the bottom of the river by a rod for anchoring, and the upper seat plate 2 is leveled by the thick leveling screws 20 and the thin leveling screws 21.

(3) The floating body 3 submerges half of the component when the component starts to operate, and the generated buoyancy just keeps the upper seat plate 2 to float on the water surface; when the water level rises, the submerged volume of the floating body 3 is increased, the generated buoyancy is increased, the telescopic rod 4 begins to slowly extend due to the buffer resistance of the rubber ring, the upper seat plate begins to float upwards, and when the position to be measured is reached, the flow rate of the flow rate display screen 11 and the water level on the scale long plate 6 are read through the camera and recorded.

2. Measuring the flow velocity of different water depths when the water level is not changed

(1) Before the flow measurement work, the height of the flow measurement propeller 14 and the working height of the upper seat plate 2 are adjusted according to the water depth of the measurement position, and the infrared camera 8 and the floating body 3 are fixed by the flow measurement component 1.

(2) The whole instrument is placed at a position to be measured, the lower bottom plate 5 sinks to the bottom of a channel or a river channel during operation, the anchoring fork rod 9 is pushed into soil at the bottom of the channel or the bottom of the river by a rod for anchoring, and the upper seat plate 2 is leveled by the coarse leveling screws 20 and the fine leveling screws 21.

(3) When the component operates, the floating body 3 generates buoyancy to enable the upper seat plate 2 to float on the water surface, the telescopic rod 4 has buffer resistance of the rubber ring, and the upper seat plate 2 cannot shake up and down due to slight fluctuation of the water level and can be stabilized on the water surface; when the measuring depth is required to be changed, the motor 15 can be remotely controlled to be started, and the distance moved by the motor 15 when the flow measuring propeller 14 is started each time is 0.3 m. The measuring range is the length of gear formula slide rail 17, and gear formula slide rail 17 can be dismantled, can change the gear formula slide rail 17 of different lengths according to the demand of different flow measuring condition before the work. When the position to be measured is reached, the flow rate of the flow rate display screen 11 and the water level on the scale long plate 6 are read and recorded through the camera.

In conclusion, the invention introduces a novel flow velocity measuring instrument which has higher popularization and application values.