阅读说明：本技术 相关性声学水体流速测量装置 (Correlation acoustic water flow velocity measuring device ) 是由 阮哲伟 孙圣舒 刘上瑜 曹淼 于 2020-05-14 设计创作，主要内容包括：本发明一种相关性声学水体流速测量装置,属于水利工程测量领域。包括：复合金属支架、声波发射传感器、声波接收传感器、换能器、计算机；所述的复合金属支架包括：铜质门型框,铝制门型框,所述的铜质门型框为黄铜片压制,黄铜片的厚度为3mm；所述的铝制门型框,为任意型材铝合金压制,铝合金厚度为4.5mm。所述的铜质门型框和铝制门型框外型尺寸完全相同；所有换能器都通过驱动装置连接在计算机上。提出了一种新的利用声相关法测量流速的装置能够进行无阻碍、无接触流速测量。(The invention discloses a device for measuring the flow velocity of a correlation acoustic water body, and belongs to the field of hydraulic engineering measurement. The method comprises the following steps: the device comprises a composite metal bracket, a sound wave transmitting sensor, a sound wave receiving sensor, a transducer and a computer; the composite metal stent comprises: the door frame is made of aluminum, and the copper door frame is formed by pressing brass sheets, and the thickness of each brass sheet is 3 mm; the aluminum door type frame is made of aluminum alloy of any section by pressing, and the thickness of the aluminum alloy is 4.5 mm. The external dimensions of the copper door-shaped frame and the aluminum door-shaped frame are completely the same; all the transducers are connected to the computer through the driving device. A new device for measuring flow velocity by using an acoustic correlation method is provided, which can perform unimpeded and non-contact flow velocity measurement.)

1. Relevance acoustics water velocity of flow measuring device, its characterized in that: the method comprises the following steps: the device comprises a composite metal bracket, a sound wave transmitting sensor, a sound wave receiving sensor, a transducer and a computer;

the composite metal stent comprises: the door frame is made of aluminum, and the copper door frame is formed by pressing brass sheets, and the thickness of each brass sheet is 3 mm; the aluminum door-shaped frame is made of aluminum alloy of any section by pressing, and the thickness of the aluminum alloy is 4.5 mm;

the copper door type frame and the aluminum door type frame have the same external dimension.

2. The correlated acoustic water flow velocity measurement apparatus of claim 1, wherein: the copper door-shaped frame comprises two cuboid stand columns and a cuboid transverse column;

the height range of the cuboid upright post is 25cm-25 m;

the length of the cuboid transverse column is 12.5cm-12.5 m;

the length proportion relation of the cuboid vertical column and the cuboid transverse column is 1: 2;

cuboid stand the same with the cross-sectional shape of cuboid spreader, and the cross-section is the rectangle, the aspect ratio of rectangle is 2: 1;

the rectangular upright post is provided with a sensor mounting hole with the diameter of 60mm in the long side direction, and a sound wave transmitting sensor and a sound wave receiving sensor are mounted on the rectangular upright post;

the sensor mounting holes are evenly distributed on the cuboid stand column, the distance between the center of the uppermost sensor mounting hole and the top end of the cuboid stand column is not less than 2.5cm, and the distance between the center of the bottommost sensor mounting hole and the bottom end of the cuboid stand column is not less than 3 cm.

3. The correlated acoustic water flow velocity measurement apparatus of claim 1, wherein: four identical gears are arranged on the upstream surface of the copper door-shaped frame, every two gears are connected by a rack, and when one gear moves, other gears move synchronously under the action of the rack;

push-pull bolts are fixed on the downstream side of the gear, the number of the push-pull bolts is four, and the push-pull bolts and the gear move synchronously;

the other end of the push-pull bolt penetrates through threads on the aluminum door type frame, and the push-pull bolt synchronously rotates to pull the aluminum door frame and the copper door frame closer or shorten when the gear rotates;

the maximum push-pull bolt push-out length is 10cm, and when the push-pull bolt retracts completely, the two door-shaped frames abut against each other;

the copper door frame is an upstream frame, and the aluminum door frame is a downstream frame.

4. The correlated acoustic water flow velocity measurement apparatus of claim 1, wherein: the acoustic wave transmitting sensor and the acoustic wave receiving sensor are arranged in two sets, wherein one set is arranged on a sensor mounting hole on the copper door-shaped frame in a one-to-one mode; in addition, the sound wave transmitting sensor and the sound wave receiving sensor are arranged on a sensor mounting hole on the aluminum door frame in a one-to-one mode;

two sound wave transmitting sensors arranged at the same position of the two door-shaped frames are connected to two output ends of the same transducer;

two sound wave receiving sensors arranged at the same position of the two door-shaped frames are connected to two input ends of the same transducer;

all the transducers are connected to the computer through the driving device.

Technical Field

The invention provides a device for measuring the flow velocity of a correlation acoustic water body, and belongs to the field of hydraulic engineering measurement.

Background

The acoustic correlation speed measurement method is a relatively new speed measurement method and has the advantage of no contact. The Zhuweiqing and the like research an acoustic correlation velocity measurement theory and a signal processing method for measuring the velocity of the fluid. A sonar array space-time correlation function suitable for the sonar array Fraunhofer area is obtained, the sonar array space-time correlation function is an exponential function, and the exponential function is a theoretical model of related flow velocity measurement. The characteristics near the maximum of the spatio-temporal acoustic correlation function, which contains the main information of the flow velocity, are intensively studied. A local least square estimation is provided as a speed estimation criterion, and a sequence quadratic programming is adopted as an optimization method, so that a signal processing method for acoustic correlation flow velocity measurement is established. Multiple offshore system tests are carried out, and a theoretical model is verified; the flow velocity, the flow direction and the flow velocity profile measured by the acoustic correlation ocean current profiler are provided, and compared with the acoustic Doppler ocean current profiler, the result is in accordance with; and finally, the mean square error of velocity measurement of the acoustic correlation ocean current profiler is given and is slightly larger than a theoretical value.

But does not provide sound-related speed measuring equipment and an installation method thereof in fresh water hydraulic engineering.

Disclosure of Invention

The invention provides a device for measuring the flow velocity of a correlation acoustic water body, which comprises the following steps:

the method comprises the following steps: the device comprises a composite metal support, a sound wave transmitting sensor, a sound wave receiving sensor, a transducer and a computer.

The composite metal stent comprises: the door frame is made of aluminum, and the copper door frame is formed by pressing brass sheets, and the thickness of each brass sheet is 3 mm; the aluminum door type frame is made of aluminum alloy of any section by pressing, and the thickness of the aluminum alloy is 4.5 mm. The copper door type frame and the aluminum door type frame have the same external dimension.

The copper door-shaped frame comprises two cuboid stand columns and a cuboid transverse column;

the height range of the cuboid upright post is 25cm-25 m;

the length of the cuboid transverse column is 12.5cm-12.5 m;

the length proportion relation of the cuboid vertical column and the cuboid transverse column is 1: 2;

cuboid stand the same with the cross-sectional shape of cuboid spreader, and the cross-section is the rectangle, the aspect ratio of rectangle is 2: 1;

the rectangular upright post is provided with a sensor mounting hole with the diameter of 60mm in the long side direction, and a sound wave transmitting sensor and a sound wave receiving sensor are mounted on the rectangular upright post;

the sensor mounting holes are evenly distributed on the cuboid stand column, the distance between the center of the uppermost sensor mounting hole and the top end of the cuboid stand column is not less than 2.5cm, and the distance between the center of the bottommost sensor mounting hole and the bottom end of the cuboid stand column is not less than 3 cm.

Four identical gears are arranged on the upstream surface of the copper door-shaped frame, every two gears are connected by a rack, and when one gear moves, other gears move synchronously under the action of the rack;

push-pull bolts are fixed on the downstream side of the gear, the number of the push-pull bolts is four, and the push-pull bolts and the gear move synchronously;

the other end of the push-pull bolt penetrates through threads on the aluminum door type frame, and the push-pull bolt synchronously rotates to pull the aluminum door frame and the copper door frame closer or shorten when the gear rotates;

the maximum push-pull bolt push-out length is 10cm, and when the push-pull bolt retracts completely, the two door-shaped frames abut against each other;

the copper door frame is an upstream frame, and the aluminum door frame is a downstream frame.

The acoustic wave transmitting sensor and the acoustic wave receiving sensor are arranged in two sets, wherein one set is arranged on a sensor mounting hole on the copper door-shaped frame in a one-to-one mode; in addition, the sound wave transmitting sensor and the sound wave receiving sensor are arranged on a sensor mounting hole on the aluminum door frame in a one-to-one mode;

two sound wave transmitting sensors arranged at the same position of the two door-shaped frames are connected to two output ends of the same transducer;

two sound wave receiving sensors arranged at the same position of the two door-shaped frames are connected to two input ends of the same transducer;

all the transducers are connected to the computer through the driving device.

When the device is installed, the composite metal bracket is arranged in the rectangular section, the copper door-shaped frame faces upstream, the aluminum door-shaped frame faces downstream, and the cuboid transverse column is embedded in the bottom surface of the rectangular section.

When the water body is measured, the computer sends a signal to the sound wave transmitting sensor through the driving device and the energy converter, the sound wave transmitting sensor sends a sound signal, the sound signal is received by the opposite sound receiving sensor after passing through the water body, and the sound signal is converted into an electric signal which is collected and identified by the computer.

The computer collects the sound waves of the two door-shaped frames at the same position to receive sensor signals and carries out correlation comparison;

when an operator adjusts the position of the push-pull bolt through the adjusting gear, the distance between the two door-shaped frames is further adjusted, and when the sound signal correlation obtained by the sound wave receiving sensor at the same position of the two door-shaped frames is the highest, the gear is stopped to be adjusted, and the measurement is started.

The invention has the beneficial effects that:

1. a new device for measuring the flow velocity by using an acoustic correlation method is provided;

2. providing an installation and use method of the flow velocity measuring device by using the acoustic correlation method;

3. the invention provides an unimpeded and contactless speed measuring device.

Drawings

FIG. 1 is a schematic view of an apparatus for measuring flow velocity by acoustic correlation according to the present invention.

Detailed Description

The embodiments are provided below in conjunction with the accompanying drawings and the invention is described in detail.