阅读说明：本技术 一种非满管流量测量装置及其实现方法 (Non-full pipe flow measuring device and implementation method thereof ) 是由 王贵周 尹玉国 薛亭亭 田洪飞 许文凯 姜棋 于 2021-10-29 设计创作，主要内容包括：本申请公开了一种非满管流量测量装置及其实现方法,包括光发射源、点阵光信号接收区、流速测量机构和空气检测机构,空气检测机构包括顶部超声波传感器和底部超声波传感器,其中点阵光信号接收区由接收器组成。所述实现方法包括管段是否满管判断步骤、计算得出流量的信息步骤和根据液位高低计算出相应的流量步骤。具有以下优点：采用的技术为超声波测量技术和光源定位检测技术,光源定位检测技术是根据固定光源通过水面的折射及接收光强度的接收器来检测液位,并进一步的计算出流量的流通面积来计算流量的。(The application discloses non-full pipe flow measuring device and an implementation method thereof, and the non-full pipe flow measuring device comprises a light emitting source, a dot matrix optical signal receiving area, a flow velocity measuring mechanism and an air detection mechanism, wherein the air detection mechanism comprises a top ultrasonic sensor and a bottom ultrasonic sensor, and the dot matrix optical signal receiving area consists of a receiver. The implementation method comprises the steps of judging whether the pipe section is full of pipes, calculating to obtain flow information and calculating the corresponding flow according to the height of the liquid level. Has the following advantages: the adopted technology is an ultrasonic measurement technology and a light source positioning detection technology, wherein the light source positioning detection technology is used for detecting the liquid level according to a fixed light source through a receiver for refracting the water surface and receiving the light intensity, and further calculating the flow area of the flow to calculate the flow.)

1. A non-full pipe flow measuring device, its characterized in that: the device comprises a light emission source (1), a dot matrix optical signal receiving area (4), a flow velocity measuring mechanism and an air detecting mechanism, wherein the air detecting mechanism comprises a top ultrasonic sensor (7) and a bottom ultrasonic sensor (8), the dot matrix optical signal receiving area (4) consists of receivers, and the flow velocity measuring mechanism is used for measuring the flow velocity of a plurality of groups of ultrasonic sensors distributed on different horizontal planes of a pipeline;

the light emitting source (1) is embedded in the left lower side of the pipe section, the inner side of the light emitting source (1) is in contact with liquid in the pipe section, and light rays are refracted through the height of a water level line (5) in the pipe section;

the light emitting source (1) gradually moves to the right along with the rise of the height of the water level line (5), and the refracted light is positioned in the upper right corner dot matrix light signal receiving area (4) of the pipe section;

the light of the light emitting source (1) has a fixed incident angle (2) and a fixed refraction angle (3) in the fixed liquid, when the light emitting source (1) emits light, the light is refracted through a water line (5), and the refracted light is emitted to a dot matrix light signal receiving area (4) at the upper right corner of the pipe section according to different angles;

when the water level is low, light is refracted to the position above the low water level through the incident angle (2) by the light emitting source (1) through the horizontal plane and is emitted according to the refraction angle (3) and is emitted to the dot matrix light signal receiving area (4), the illumination intensity received by the dot matrix light signal receiving area (4) is converted into an electric signal value, the refraction angle can be determined according to the size of the electric signal, and the liquid level height can be deduced according to different pipe section inner diameters through geometric calculation.

2. A non-full pipe flow measurement apparatus as set forth in claim 1, wherein: the lattice optical signal receiving area (4) is arranged in a small part of area of the upper right corner of the pipe section, and a plurality of photoresistor particles are uniformly arranged in a matrix form to receive the illumination intensity after the light emitting source refracts.

3. A non-full pipe flow measuring device as defined in claim 2, wherein: the lattice optical signal receiving area (4) is composed of a plurality of loops, the number of the loops is more than or equal to 20, and each loop is provided with 5 or more photoresistor particles which are connected in parallel and used for receiving refracted light rays at different angles.

4. A non-full pipe flow measuring device as defined in claim 2, wherein: and the top ultrasonic sensor (7) and the bottom ultrasonic sensor (8) are respectively embedded in the uppermost edge and the lowermost edge of the ultrasonic flowmeter pipe section device.

5. A method for realizing a non-full pipe flow measuring device is characterized by comprising the following steps: the implementation method is applied to the non-full pipe flow measuring device of any one of claims 1 to 4, and comprises the following steps of judging whether the pipe section is full:

when liquid in the pipeline is not full, the ultrasonic signal emitted by the bottom ultrasonic sensor (8) is seriously attenuated when passing through air, the top ultrasonic sensor (7) judges whether air enters the pipeline section or not according to the received signal, and the top ultrasonic sensor (7) cannot detect the signal to judge that the pipeline is not full at the moment.

6. A method of implementing a non-full pipe flow measurement device as defined in claim 5, wherein: the implementation method also comprises the following information step of calculating the flow:

the light emitting source emits light, the light is emitted into the air through a horizontal plane inside the liquid, according to the propagation of the light, the refraction phenomenon can occur when the light passes through different media, the positions of an incident angle and a refraction angle change according to the liquid level height of the media, when the horizontal plane inside the pipe section changes, an incident point changes along with the change of the incident angle, the angle of the incident angle and the refraction angle in the same media in the pipe section is not changed, so that the refraction point can be refracted to different positions of a receiving area of a point array optical signal according to the difference of the incident point, after the point of the optical signal is received, the resistance value of the photosensitive resistor is reduced along with the increase of the illumination intensity, the voltage value of the optical signal is analyzed and calculated, and then the information of the flow rate during the high water level line is obtained.

7. A method of implementing a non-full pipe flow measurement device as defined in claim 5, wherein: the implementation method also comprises the following steps of calculating the corresponding flow according to the liquid level:

through the ultrasonic sensor among the velocity of flow detection mechanism, can derive the velocity of flow information in the liquid, the ultrasonic velocity of flow detection group on different planes can combine and calculate corresponding flow model, and then reachs flow information, and the liquid level must be higher than the ultrasonic sensor of a set of minimum level and can further calculate flow data.

Technical Field

The invention belongs to the technical field of measurement, and particularly relates to a non-full pipe flow measuring device for liquid flow measurement.

Background

In the metering technology, liquid flowing through a flowmeter is required to be full of pipes, the flowmeter is an important component of metering instrument equipment, and the flowmeter is widely applied in various fields and promotes and supports the continuous development of national economy. However, many flow meters can not visually see whether the internal liquid fills the pipe section, which may cause the accuracy of flow measurement to be reduced, especially when the flow is not full, the proportion of the liquid in the pipe directly affects the accuracy of measurement.

Disclosure of Invention

The invention aims to solve the technical problem that the flow measuring device for the non-full pipe overcomes the defect that the flow is measured by the non-full pipe of the existing flow meter, the adopted technology is an ultrasonic measuring technology and a light source positioning detection technology, the light source positioning detection technology is used for detecting the liquid level through a receiver which is used for detecting the refraction of a fixed light source through the water surface and receiving the light intensity, and the flow is calculated by further calculating the flow area of the flow.

In order to solve the technical problems, the invention adopts the following technical scheme:

a non-full pipe flow measuring device comprises a light emitting source, a dot matrix light signal receiving area, a flow velocity measuring mechanism and an air detecting mechanism, wherein the air detecting mechanism comprises a top ultrasonic sensor and a bottom ultrasonic sensor, the dot matrix light signal receiving area consists of receivers, and the flow velocity measuring mechanism is used for measuring the flow velocity of a plurality of groups of ultrasonic sensors distributed on different horizontal planes of a pipeline;

when the water level is low, the light emitting source refracts light to the position above the low water level through the incident angle through the horizontal plane and emits the light according to the refraction angle to the dot matrix light signal receiving area, the illumination intensity received by the dot matrix light signal receiving area is converted into an electric signal value, the refraction angle can be determined according to the size of the electric signal, and the liquid level height can be deduced according to different pipe section inner diameters through geometric calculation.

Furthermore, the light emitting source is embedded in the left lower side of the pipe section, the inner side of the light emitting source is in contact with liquid in the pipe section, and light rays are refracted through the height of a water level line in the pipe section.

Furthermore, the light emitting source rises along with the height of the water level line, the refraction point gradually moves to the right, and the refracted light is positioned in the upper right corner dot matrix light signal receiving area of the pipe section.

Furthermore, the light of the light emitting source has a fixed incident angle and a fixed refraction angle in the fixed liquid, when the light emitting source emits light, the light is refracted by a water line, and the refracted light is emitted to the dot matrix light signal receiving area at the upper right corner of the pipe section according to different angles.

Furthermore, the lattice optical signal receiving area is arranged in a small part of area at the upper right corner of the pipe section, and a plurality of photoresistor particles are uniformly arranged in a matrix form so as to receive the illumination intensity after the light emitting source refracts.

Furthermore, the lattice optical signal receiving area is composed of a plurality of loops, the number of the loops is more than or equal to 20, and each loop is provided with 5 or more photoresistor particles which are connected in parallel and used for receiving refracted light rays at different angles.

Further, the top ultrasonic sensor and the bottom ultrasonic sensor are respectively embedded in the uppermost edge and the lowermost edge of the ultrasonic flowmeter pipe section device.

An implementation method of a non-full pipe flow measuring device comprises the following steps:

when the liquid in the pipeline is not full, the ultrasonic signal emitted by the bottom ultrasonic sensor is seriously attenuated when passing through the air, the top ultrasonic sensor judges whether air enters the pipeline section according to the received signal, and the top ultrasonic sensor cannot detect the signal to judge that the pipeline is not full at the moment.

Further, the implementation method further comprises the step of calculating information of the flow:

the light emitting source emits light, the light is emitted into the air through a horizontal plane inside the liquid, according to the propagation of the light, the refraction phenomenon can occur when the light passes through different media, the positions of an incident angle and a refraction angle change according to the liquid level height of the media, when the horizontal plane inside the pipe section changes, an incident point changes along with the change of the incident angle, the angle of the incident angle and the refraction angle in the same media in the pipe section is not changed, so that the refraction point can be refracted to different positions of a receiving area of a point array optical signal according to the difference of the incident point, after the point of the optical signal is received, the resistance value of the photosensitive resistor is reduced along with the increase of the illumination intensity, the voltage value of the optical signal is analyzed and calculated, and then the information of the flow rate during the high water level line is obtained.

By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:

under the condition that the pipe section is not full of pipes, the flow rate cannot continue to run according to the condition of full pipes, the reliability of the flowmeter is improved, the receiver can monitor the liquid level of the non-full pipes in real time, the liquid flow rate under the condition of the non-full pipes can be further calculated through ultrasonic flow measurement and the liquid level height, and data support is provided for flow measurement.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of the internal operation of a pipe section at a low water line;

FIG. 2 is a schematic view of the internal operation of the spool piece at a low water line;

FIG. 3 is a circuit diagram of an optical signal receiver;

FIG. 4 is a diagram showing refraction point change during water level change;

FIG. 5 is a schematic view of an arrangement of ultrasonic flow rate sensing component layers in a flow rate measurement mechanism;

FIG. 6 is a schematic diagram of 45 degree correlation between each set of two ultrasonic sensors;

in fig. 1 and 2: 1. a light emitting source; 2. an angle of incidence; 3. an angle of refraction; 4. a lattice optical signal receiving area; 5. a water line; 6. a pipe section; 7. a top ultrasonic sensor; 8. a bottom ultrasonic sensor;

in FIG. 3, R is the photo-resistor particle, V1+, V2+, V3+, … …, VX + is the positive electrode of the electrical signal, V1-, V2-, V3-, … …, VX-is the test point of the electrical signal;

in fig. 4, L1 and L2 are water level heights, and J1 and J2 are receiving points of the incident point a which reaches the pipe wall after refraction when the water level is different between L1 and L2.

Detailed Description

Example 1, as shown in fig. 1 and 2, a non-full pipe flow measuring device includes a light emitting source 1, a lattice light signal receiving area 4, and an air detection mechanism including a top ultrasonic sensor 7 and a bottom ultrasonic sensor 8, wherein the lattice light signal receiving area is composed of a receiver. When the water level is low, the light emitting source 1 refracts light to the lower water level line through the incident angle 2 through the horizontal plane and emits the light according to the refraction angle 3 to the dot array light signal receiving area 4, and after the point of the light signal is received, the measured values of the V1-, V2-, V3-, … … and VX-electric signals are analyzed and calculated to obtain related liquid level information, wherein the resistance value of the photosensitive resistor particles is reduced along with the increase of the illumination intensity, and further the information of the liquid level height at the lower water level line is obtained.

The light emitting source 1 is embedded in the left lower side of the pipe section 6, the inner side of the light emitting source 1 is contacted with liquid in the pipe section 6, and light rays are refracted through the height of a water level line 5 in the pipe section 6; when the liquid surface positions are different, the positions of the refraction points are different.

As shown in FIG. 4, when the height of water is L1, the incident point A is refracted and reaches the J1 position of the pipe wall, and the position can be located by the receiver, so that the height L1 can be calculated. When the water level height is L2, the height can be calculated by positioning the receiver at the position, wherein the height is L2, the difference h between L2 and L1 is known by the law of refraction, and the refracted ray from the medium contact surface to the receiving point J1 is parallel to the refracted ray of J2.

The light emitting source 1 gradually moves to the right along with the rising of the water level line 5, and the refracted light rays are basically positioned in the upper right corner dot matrix light signal receiving area 4 of the pipe section 6.

The light of the light emitting source 1 has a fixed incident angle 2 and a fixed refraction angle 3 in the fixed liquid, when the light emitting source 1 emits light, the light is refracted by a water level line 5, and the refracted light is emitted to an upper right corner dot matrix light signal receiving area 4 of a pipe section 6 according to different angles.

The plane formed by the incident light ray and the normal of the interface passing through the incident point is called an incident plane, and the included angles between the incident light ray and the refracted light ray and the normal are called an incident angle and a refracted angle respectively and are expressed by theta 1 and theta 2.

The law of refraction is expressed as that (i) the refracted ray is in the incident plane. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, denoted by n21, i.e.

；

Where n21 is referred to as the relative refractive index of the second medium to the first medium.

When light enters a medium with low light speed from a medium with high light speed, the refraction angle is smaller than the incident angle; when the medium with small light speed enters the medium with large light speed, the refraction angle is larger than the incidence angle.

In practical applications, in the case that the two media are not changed, the incident angle is not changed, and the relative refractive index n21 is constant, so that the refraction angle is not changed.

The light emitting source 1 is fixedly arranged at the lower left corner of the pipe section 6, and the dot matrix light signal receiving area 4 is derived according to different liquid levels, so that the dot matrix light signal receiving area 4 only occupies a small part of the upper right corner of the pipe section 6.

The lattice optical signal receiving area 4 is arranged in a small part of the area of the upper right corner of the tube section 6, and 5X (X is more than or equal to 20) photoresistor particles are uniformly arranged in a matrix form so as to receive the illumination intensity after the light emitting source refracts.

The illumination intensity received by the dot matrix optical signal receiving area 4 is converted into an electric signal value, the refraction angle can be determined according to the size of the electric signal, the liquid level height can be deduced according to the inner diameters of different pipe sections 6 through geometric calculation, and the current flow value can be calculated according to the full pipe flow.

The lattice optical signal receiving area 4 consists of X (X is more than or equal to 20) loops, and each loop is provided with 5 photoresistor particles which are connected in parallel and used for receiving refracted rays of different angles.

An ultrasonic sensor is respectively embedded into the uppermost edge and the lowermost edge of the ultrasonic flowmeter pipe section 6 device, namely a top ultrasonic sensor 7 and a bottom ultrasonic sensor 8, when liquid in the pipe section 6 is not full of pipes, the ultrasonic sensors cannot detect signals, and the pipe section 6 is warned that the pipes are not full.

When the water level is high, the light emitting source 1 refracts light to a position above a low water level line through the incident angle 2 through a horizontal plane and emits the light according to the refraction angle 3 to the dot array light signal receiving area 4, after the point of the light signal is received, the voltage value of the light signal is analyzed and calculated to obtain related liquid level information, wherein the resistance value of the photosensitive resistor is reduced along with the increase of the illumination intensity, and then the information of the flow rate of the high water level line is obtained.

As shown in fig. 5 and 6, the non-full pipe flow measuring device further comprises a flow rate measuring mechanism, the flow rate measuring mechanism comprises a plurality of groups of ultrasonic flow rate detection groups, each group of ultrasonic flow rate detection groups comprises two ultrasonic sensors, each group of ultrasonic flow rate detection groups forms a sound path, the two ultrasonic sensors in each group are staggered on the pipeline to form 45-degree included angle correlation, and the plurality of groups of ultrasonic flow rate detection groups are arranged on the layered surfaces of at least three different horizontal lines to ensure that the flow rate measuring mechanism can detect the liquid flow in the pipe under the state of the lowest liquid level. The height of the liquid level must exceed the 1# sound path to carry out effective measurement, and the ultrasonic sensor establishes a flow model of the liquid flow of the liquid level with different heights of the non-full pipe according to the detected flow, and then calculates the corresponding flow.

A method for realizing a non-full pipe flow measuring device comprises the following steps:

step 1, judging whether the pipe section is full.

When the liquid in the pipeline is not full, the ultrasonic signal emitted by the bottom ultrasonic sensor 8 is seriously attenuated when passing through the air, the top ultrasonic sensor 7 judges whether air enters the pipeline section or not according to the received signal, and the top ultrasonic sensor 7 judges that the pipeline is not full when not detecting the signal.

And 2, calculating to obtain the information of the flow.

The light emitting source emits light, the light is emitted into the air through a horizontal plane inside the liquid, according to the propagation of the light, the refraction phenomenon can occur when the light passes through different media, the positions of an incident angle and a refraction angle change according to the liquid level height of the media, when the horizontal plane inside the pipe section changes, an incident point changes along with the change of the incident angle, the angle of the incident angle and the refraction angle in the same media in the pipe section is not changed, so that the refraction point can be refracted to different positions of a dot matrix optical signal receiving area 4 according to the difference of the incident point, after the point of the optical signal is received, the resistance value of the photosensitive resistor is reduced along with the increase of the illumination intensity, the voltage value of the optical signal is analyzed and calculated, and then the information of the flow rate during the high water level line is obtained.

For example, as shown in fig. 3, the photoresistor grains between V1+ and V1-are arranged parallel to the liquid level of the pipeline, V1-is terminated at a fixed resistance Rg, ideally, the central point of the light source falls on the resistive grains R between Vn + (n =1,2,3, …, x) and Vn- (n =1,2,3, …, x) after the light source is irradiated directly, the resistance value of R decreases with the increase of the light intensity, so the overall resistance value between Vn + (n =1,2,3, …, x) and Vn- (n =1,2,3, …, x) becomes smaller, the voltage value Vc of Vn-measured according to ohm's law and voltage division law in the case where V is constant, increases, and the voltage value of each measurement point Vn-is monitored, so that the voltage value of Vn-can be set off after refraction and fall on the position of the receiving area, and then the height of the liquid level and the flow area can be obtained.

And 3, calculating corresponding flow according to the liquid level.

Through the ultrasonic sensor among the velocity of flow detection mechanism, can derive the velocity of flow information in the liquid, the ultrasonic velocity of flow detection group on different planes can combine and calculate corresponding flow model, and then reachs flow information, and the liquid level must be higher than the ultrasonic sensor of a set of minimum level and can further calculate flow data.

The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.