阅读说明：本技术 一种涡轮流量传感器、流量计及流量检测方法 (Turbine flow sensor, flowmeter and flow detection method ) 是由 王锦鸿 许翔 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种涡轮流量传感器,包括传感器主体,所述传感器主体设有流体通道和导流装置；所述流体通道内设有可旋转叶片和用于检测所述可旋转叶片旋转角度及旋转方向的红外检测模块,所述导流装置包括前导流件、后导流件；所述前导流件位于所述可旋转叶片的一侧的流体通道内,所述后导流件位于所述可旋转叶片的另一侧的流体通道内。本发明实施例提供的涡轮流量传感器通过结构改进能够避免旋转叶片受到外围磁场干扰,提高流量检测的准确性和可靠性。本发明还提供一种流量计及流量检测方法。(The invention discloses a turbine flow sensor, which comprises a sensor main body, wherein the sensor main body is provided with a fluid channel and a flow guide device; a rotatable blade and an infrared detection module for detecting the rotation angle and the rotation direction of the rotatable blade are arranged in the fluid channel, and the flow guide device comprises a front flow guide part and a rear flow guide part; the front guide piece is positioned in the fluid passage on one side of the rotatable blade, and the rear guide piece is positioned in the fluid passage on the other side of the rotatable blade. According to the turbine flow sensor provided by the embodiment of the invention, through structural improvement, the rotating blade can be prevented from being interfered by a peripheral magnetic field, and the accuracy and reliability of flow detection are improved. The invention also provides a flowmeter and a flow detection method.)

1. The turbine flow sensor is characterized by comprising a sensor main body, wherein the sensor main body is provided with a fluid channel and a flow guide device;

a rotatable blade and an infrared detection module for detecting the rotation angle and the rotation direction of the rotatable blade are arranged in the fluid channel, and the flow guide device comprises a front flow guide part and a rear flow guide part;

the front guide piece is positioned in the fluid passage on one side of the rotatable blade, and the rear guide piece is positioned in the fluid passage on the other side of the rotatable blade.

2. The turbine flow sensor according to claim 1, wherein a plurality of first flow deflectors are disposed in the front flow guide member, and a flow guide channel formed by the plurality of first flow deflectors in the front flow guide member communicates with an opening at one end of the flow guide channel and the flow guide channel where the rotatable blade is disposed;

and a plurality of second flow deflectors are arranged in the rear flow guide part, and a flow guide channel formed by the second flow deflectors in the rear flow guide part is communicated with an opening at the other end of the fluid channel and the fluid channel where the rotatable blade is positioned.

3. The turbine flow sensor of claim 2 wherein a plurality of the first vanes are parallel to each other and a plurality of the second vanes are parallel to each other, wherein one of the first vanes is parallel to or collinear with one of the second vanes.

4. The turbine flow sensor of claim 2 or 3 wherein a plurality of the first flow deflectors are obliquely disposed within the forward flow guide and a plurality of the second flow deflectors are obliquely disposed within the aft flow guide.

5. The turbine flow sensor of claim 1 wherein the rotatable vanes comprise a rotating shaft and at least two reflective vanes mounted on the rotating shaft that reflect infrared light;

the infrared detection module comprises an infrared transmitting tube, a first infrared receiving tube and a second infrared receiving tube, and infrared rays emitted by the infrared transmitting tube are transmitted to the first infrared receiving tube or the second infrared receiving tube through the reflective blades.

6. The turbine flow sensor of claim 5 wherein the light emitting end of the infrared emitting tube is at a 90 ° angle to the receiving end of the first infrared receiving tube about the center of the rotatable blade;

the light emitting end of the infrared emission tube and the receiving end of the second infrared receiving tube form an angle of 135 degrees with respect to the center of the rotatable blade, and the first infrared receiving tube is positioned between the second infrared receiving tube and the infrared emission tube.

7. A flowmeter, characterized by comprising a power supply, a signal processor and the turbine flow sensor as claimed in any one of claims 1 to 6, wherein the power supply is electrically connected with the signal processor and the infrared detection module respectively, and the data terminal of the signal processor is connected with the signal output terminal of the infrared detection module.

8. A flow sensing method adapted for use with the flowmeter of claim 7, comprising the steps of:

the infrared detection module sends a detection signal to the signal processor;

and the signal processor obtains the rotation period of the rotatable blade according to the detection signal, and substitutes the rotation period of the rotatable blade and the inner diameter of the fluid channel into a preset flow detection formula to calculate to obtain the flow.

9. The flow sensing method of claim 8,

the preset flow detection formula is as follows:

where Vr represents the rotational rate of the rotatable blade, T represents the rotational period of the rotatable blade, a represents the calibration parameter, V1 represents the fluid flow rate, Q represents the flow rate, and D represents the inner diameter of the fluid passageway.

10. The flow sensing method according to claim 8 or 9, wherein the method further comprises:

and the signal processor judges the fluid direction according to the detection signal, wherein the fluid direction is that the fluid enters the fluid channel through the front flow guide part or the fluid enters the fluid channel through the rear flow guide part.

Technical Field

The invention relates to the technical field of measurement and control, in particular to a turbine flow sensor, a flowmeter and a flow detection method.

Background

The turbine flow sensor is a precise flow measuring instrument, and can be matched with a corresponding flow integrating instrument to measure the flow and the total amount of liquid. The device is widely applied to metering and control systems in the fields of petroleum, chemical engineering, metallurgy, scientific research and the like.

Disclosure of Invention

The invention provides a turbine flow sensor, a flowmeter and a flow detection method, which are used for solving the technical problem that the conventional turbine flow sensor adopts magnetic rotating blades and is easy to interfere.

In order to solve the technical problem, an embodiment of the present invention provides a turbine flow sensor, including a sensor main body, where the sensor main body is provided with a fluid passage and a flow guide device;

a rotatable blade and an infrared detection module for detecting the rotation angle and the rotation direction of the rotatable blade are arranged in the fluid channel, and the flow guide device comprises a front flow guide part and a rear flow guide part;

the front guide piece is positioned in the fluid passage on one side of the rotatable blade, and the rear guide piece is positioned in the fluid passage on the other side of the rotatable blade.

As a preferred scheme, a plurality of first flow deflectors are arranged in the front flow guide part, and a flow guide channel formed by the first flow deflectors in the front flow guide part is communicated with an opening at one end of the fluid channel and the fluid channel where the rotatable blade is located;

and a plurality of second flow deflectors are arranged in the rear flow guide part, and a flow guide channel formed by the second flow deflectors in the rear flow guide part is communicated with an opening at the other end of the fluid channel and the fluid channel where the rotatable blade is positioned.

Preferably, a plurality of the first guide vanes are parallel to each other, a plurality of the second guide vanes are parallel to each other, and one of the first guide vanes and one of the second guide vanes are parallel to each other or on the same straight line.

Preferably, the first guide vanes are obliquely arranged in the front guide part, and the second guide vanes are obliquely arranged in the rear guide part.

Preferably, the rotatable blades comprise a rotating shaft and at least two pieces of reflective blades which are arranged on the rotating shaft and can reflect infrared rays;

the infrared detection module comprises an infrared transmitting tube, a first infrared receiving tube and a second infrared receiving tube, and infrared rays emitted by the infrared transmitting tube are transmitted to the first infrared receiving tube or the second infrared receiving tube through the reflective blades.

Preferably, the light emitting end of the infrared emission tube and the receiving end of the first infrared receiving tube form an angle of 90 degrees with respect to the center of the rotatable blade;

the light emitting end of the infrared emission tube and the receiving end of the second infrared receiving tube form an angle of 135 degrees with respect to the center of the rotatable blade, and the first infrared receiving tube is positioned between the second infrared receiving tube and the infrared emission tube.

It should be understood that the angles of the infrared transmitting tube and the first infrared receiving tube and the second infrared receiving tube are set to 90 ° and 135 ° respectively, which is only one of the many possible embodiments of the present invention, and are not limited to 90 ° and 135 °, and may be adjusted to other angle relationships according to practical applications.

The embodiment of the invention also provides a flowmeter which comprises a power supply, a signal processor and the turbine flow sensor, wherein the power supply is respectively and electrically connected with the signal processor and the infrared detection module, and the data end of the signal processor is connected with the signal output end of the infrared detection module.

The embodiment of the invention also provides a flow detection method suitable for the flowmeter, which comprises the following steps:

the infrared detection module sends a detection signal to the signal processor;

and the signal processor obtains the rotation period of the rotatable blade according to the detection signal, and substitutes the rotation period of the rotatable blade and the inner diameter of the fluid channel into a preset flow detection formula to calculate to obtain the flow.

As a preferred scheme, the preset flow detection formula is as follows:

where Vr represents the rotational rate of the rotatable blade, T represents the rotational period of the rotatable blade, a represents the calibration parameter, V1 represents the fluid flow rate, Q represents the flow rate, and D represents the inner diameter of the fluid passageway.

Preferably, the method further comprises:

and the signal processor judges the fluid direction according to the detection signal, wherein the fluid direction is that the fluid enters the fluid channel through the front flow guide part or the fluid enters the fluid channel through the rear flow guide part.

To sum up, the embodiment of the present invention provides a turbine flow sensor, a flow meter, and a flow detection method, and any of the embodiments thereof has the following beneficial effects:

the turbine flow sensor comprises a sensor main body, wherein the sensor main body is provided with a fluid channel and a flow guide device; a rotatable blade and an infrared detection module for detecting the rotation angle and the rotation direction of the rotatable blade are arranged in the fluid channel, and the flow guide device comprises a front flow guide part and a rear flow guide part; the front guide piece is positioned in the fluid passage on one side of the rotatable blade, and the rear guide piece is positioned in the fluid passage on the other side of the rotatable blade. Through carrying out configuration improvement to turbine flow sensor, use infrared detection module to replace current magnetic field detection mode, avoided turbine flow sensor from the root to receive peripheral magnetic field interference to be favorable to improving flow detection's accuracy and reliability. The flow guide pieces are arranged in the front and back directions of the fluid channel, so that when the turbine flow sensor is applied to flow detection, flow can enter from the front end or the back end of the fluid channel and cause the rotatable blades to rotate, the infrared detection module can acquire signals, and the flow signal acquisition function is realized.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a longitudinal cross-sectional view of a turbine flow sensor in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a turbine flow sensor in an embodiment of the present invention;

FIG. 3 illustrates fluid entering the fluid passageway from the front baffle;

FIG. 4 illustrates fluid entering the fluid passageway from the rear baffle;

FIG. 5 is a graph of sensed signals for a flow meter in an embodiment of the invention with the vanes rotating in the forward direction;

FIG. 6 is a graph of sensed signals for a counter-rotating blade of a flow meter in an embodiment of the invention;

FIG. 7 is a flow chart of the steps of a flow detection method in an embodiment of the present invention;

wherein the reference numbers in the drawings of the specification are as follows:

1. a second infrared receiving tube; 2. a first infrared receiving tube; 3. an infrared emission tube; 4. a rotatable blade; 5. a housing; 6. a rear flow guide member; 7. a front flow guide member.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a turbine flow sensor, including a sensor body having a fluid passage and a flow guide device;

the fluid channel is internally provided with a rotatable blade 4 and an infrared detection module for detecting the rotation angle and the rotation direction of the rotatable blade 4, and the flow guide device comprises a front flow guide part 7 and a rear flow guide part 6;

the front guide member 7 is located in the fluid passage of one side of the rotatable blade 4, and the rear guide member 6 is located in the fluid passage of the other side of the rotatable blade 4.

In the embodiment, the turbine flow sensor is structurally improved, the infrared detection module is used for replacing the existing magnetic field detection mode, and the turbine flow sensor is fundamentally prevented from being interfered by a peripheral magnetic field, so that the accuracy and the reliability of flow detection are improved. Flow guide pieces are arranged in the front and back directions of the fluid channel, so that when the turbine flow sensor is applied to flow detection, flow can enter from the front end or the back end of the fluid channel and cause the rotatable blades 4 to rotate, the infrared detection module can acquire signals, and the flow signal acquisition function is realized.

It should be noted that the infrared detection module is configured to generate directional infrared light and receive infrared external light reflected by the rotatable blade 4, and convert the received infrared light into an electrical signal and transmit the electrical signal to the signal processor, so that the signal processor amplifies, shapes, and performs operation on the electrical signal converted from the infrared light, and outputs the fluid flow.

Referring to fig. 1, in order to make the fluid uniformly enter the fluid channel to cause the rotation of the rotatable blade 4, a plurality of first guide vanes are arranged in the front guide member 7, and a guide channel formed by the first guide vanes in the front guide member 7 communicates with an opening at one end of the fluid channel and the fluid channel where the rotatable blade 4 is located; a plurality of second flow deflectors are arranged in the rear flow guide part 6, and a flow guide channel formed by the second flow deflectors in the rear flow guide part 6 is communicated with an opening at the other end of the fluid channel and the fluid channel where the rotatable blade 4 is located. Preferably, in the front baffle 7, the linear distance between two adjacent first baffles is equal, and likewise, the linear distance between two adjacent second baffles is equal.

Preferably, the first guide vanes are obliquely arranged in the front guide member 7, the second guide vanes are obliquely arranged in the rear guide member 6, the first guide vanes are connecting plates with a certain inclination angle in the front guide member 7, and the second guide vanes are connecting plates with a certain inclination angle in the rear guide member 6. The first guide vanes are parallel to each other, the second guide vanes are parallel to each other, one of the first guide vanes is parallel to one of the second guide vanes or is on the same straight line, and the first guide vanes correspond to the second guide vanes at 180 degrees.

When the fluid enters from the front flow guide part 7, the front flow guide part 7 has a certain inclination angle, so that the fluid can deflect under the action of the front flow guide part 7 and simultaneously push the rotatable blades 4, and the rotatable blades 4 are rotated in a forward direction (the direction is designated as a forward direction) (as shown by an arrow in fig. 3, the direction is a fluid flow direction);

when the fluid enters from the rear guide member 6, the fluid generates a deflection direction opposite to the deflection direction generated by the front guide member 7 under the action of the rear guide member 6 because the rear guide member 6 corresponds to the front guide member 7 at an angle of 180 °, and simultaneously pushes the rotatable blades 4 to generate a reverse rotation of the rotatable blades 4 (as shown by an arrow in fig. 4, the fluid flow direction is shown).

Referring to fig. 1 and 2, in one embodiment of the present invention, the rotatable blade 4 comprises a rotating shaft and at least two reflective blades mounted on the rotating shaft and capable of reflecting infrared light;

the infrared detection module comprises an infrared transmitting tube 3, a first infrared receiving tube 2 and a second infrared receiving tube 1, and infrared rays emitted by the infrared transmitting tube 3 are transmitted to the first infrared receiving tube 2 or the second infrared receiving tube 1 through the reflective blades.

Preferably, the light emitting end of the infrared emission tube 3 and the receiving end of the first infrared receiving tube 2 form an angle of 90 ° with respect to the center of the rotatable blade 4;

the light emitting end of the infrared emission tube 3 and the receiving end of the second infrared receiving tube 1 form an angle of 135 degrees with respect to the center of the rotatable blade 4, and the first infrared receiving tube 2 is positioned between the second infrared receiving tube 1 and the infrared emission tube 3.

In this embodiment, but a infrared transmitting tube 3, first infrared receiving tube 2 and second infrared receiving tube 1 are installed to rotatable blade 4's rotatory tangent plane, first infrared transmitting tube 3 with second infrared receiving tube 1 is 90 and places, first infrared receiving tube 2 with second infrared receiving tube 1 is 45 and places (the angle can be adjusted according to actual need), and 3 infrared pipes all with the blade plane of rotation coplanar.

It should be noted that, the angles of the infrared transmitting tube 3 and the first infrared receiving tube 2 and the second infrared receiving tube 1 are set to be 90 ° and 135 ° respectively, which is only one of many possible embodiments of the present invention, and are not limited to 90 ° and 135 °, and may be adjusted to other angle relationships according to practical applications, and details are not repeated here.

Furthermore, in the embodiment of the present invention, in order to rationalize the structure, the sensor body further includes a housing 5 for mounting and fixing the respective components, and the fluid passage is provided in the housing 5. Preferably, the fluid channel has a circular cross-section.

The embodiment of the invention also provides a flowmeter which comprises a power supply, a signal processor and the turbine flow sensor, wherein the power supply is respectively and electrically connected with the signal processor and the infrared detection module, and the data end of the signal processor is connected with the signal output end of the infrared detection module.

When the rotatable blades 4 rotate, the blades rotate to a specific angle, infrared light rays emitted by the infrared emission tube 3 are reflected to the first infrared receiving tube 2 or the second infrared receiving tube 1 through the blades, are converted into electric signals by the first infrared receiving tube 2 or the second infrared receiving tube 1 and are transmitted to the signal processor, and the electric signals are amplified, shaped and operated by the signal processor to output fluid flow.

The embodiment of the invention also provides a flow detection method suitable for the flowmeter, which comprises the following steps:

s1, the infrared detection module sends a detection signal to the signal processor;

and S2, the signal processor obtains the rotation period of the rotatable blade 4 according to the detection signal, and substitutes the rotation period of the rotatable blade 4 and the inner diameter of the fluid channel into a preset flow detection formula to calculate the flow.

Wherein, the preset flow detection formula is as follows:

where Vr represents the rotational rate of the rotatable blade 4, T represents the rotational period of the rotatable blade 4, a represents the calibration parameter, V1 represents the fluid flow rate, Q represents the flow rate, and D represents the inner diameter of the fluid passageway.

In one embodiment of the present invention, the method further comprises:

and S3, the signal processor judges the fluid direction according to the detection signal, wherein the fluid direction is that the fluid enters the fluid channel through the front flow guide part 7 or the fluid enters the fluid channel through the rear flow guide part 6.

As an example, the flow detection principle of the flow meter is explained as follows:

when the blade generates positive rotation, the detection process is as follows:

1. when the blade rotates to a specific angle, infrared light rays emitted by the infrared emission tube 3 are reflected to the first infrared receiving tube 2 through the blade and are converted into electric signals by the first infrared receiving tube 2;

2. the blades continue to rotate, the infrared transmitting tube 3 transmits infrared rays and the infrared rays reflected by the blades leave the first infrared receiving tube 2;

3. the blades continue to rotate, infrared light rays emitted by the infrared emission tube 3 are reflected to the second infrared receiving tube 1 through the blades and are converted into electric signals by the second infrared receiving tube 1;

4. the blades continue to rotate, the infrared transmitting tube 3 transmits infrared rays and the infrared rays reflected by the blades leave the second infrared receiving tube 1;

5. the blade rotation repeats the processes 1 to 4.

The signal processor receives the electrical signals generated from the first infrared receiving tube 2 and the second infrared receiving tube 1, amplifies and shapes the electrical signals, and when the blade rotates in the forward direction, the shaped signals are as shown in fig. 5.

When the blades rotate reversely, the detection process is as follows:

1. when the blade rotates to a specific angle, the infrared light emitted by the infrared emission tube 3 is reflected to the second infrared receiving tube 1 through the blade and is converted into an electric signal by the second infrared receiving tube 1;

2. the blades continue to rotate, the infrared transmitting tube 3 transmits infrared rays and the infrared rays reflected by the blades leave the second infrared receiving tube 1;

3. the blades continue to rotate, infrared light rays emitted by the infrared emission tube 3 are reflected to the first infrared receiving tube 2 through the blades and are converted into electric signals by the first infrared receiving tube 2;

4. the blades continue to rotate, the infrared transmitting tube 3 transmits infrared rays and the infrared rays reflected by the blades leave the first infrared receiving tube 2;

5. the blade rotation repeats the processes 1 to 4.

The signal processor receives the electrical signals generated from the first infrared receiving tube 2 and the second infrared receiving tube 1, amplifies and shapes the electrical signals, and the shaped signals are as shown in fig. 6 when the blade rotates in the forward direction.

Referring to fig. 7, during the forward rotation or reverse rotation of the rotatable blade 4, the 4 signal states (b01, b00, b10, b00) are set for each rotation of the blade, the states when the two signals are b01 are assigned, the interval time T (T2-T1) is calculated according to the rotation speed

And calculating the rotation speed of the blade.

Because the fluid flow velocity and the blade are in a positive proportional relationship, the fluid flow velocity is V1 (a is a calibration parameter and is measured and calculated according to actual conditions), the fluid flow velocity is a multiplied by Vr (a is a calibration parameter), the inner diameter of the through hole of the sensor is D, and the calculated flow can be obtained

To sum up, the embodiment of the invention provides a turbine flow sensor, a flowmeter and a flow detection method, and has the following beneficial effects:

1. through carrying out institutional advancement to turbine flow sensor, use infrared detection module to replace current magnetic field detection mode, avoided turbine flow sensor from the root to receive peripheral magnetic field interference, need not additionally to carry out antimagnetic processing to be favorable to improving flow detection's accuracy and reliability.

2. The flow guide pieces are arranged in the front and back directions of the fluid channel, so that when the turbine flow sensor is applied to flow detection, flow can enter from the front end or the back end of the fluid channel and cause the rotatable blades 4 to rotate, the infrared detection module can acquire signals, and the flow signal acquisition function is realized.

3. Through the diversion of the front diversion part 7 and the rear diversion part 6, the signal processor can detect the flowing direction of the fluid according to the optical signals of the first infrared receiving tube 2 and the second infrared receiving tube 1.

4. The turbine flow sensor has simple structure and low cost.

It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.