CN106093460B - Flow velocity measuring device - Google Patents
Flow velocity measuring device Download PDFInfo
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- CN106093460B CN106093460B CN201610658414.2A CN201610658414A CN106093460B CN 106093460 B CN106093460 B CN 106093460B CN 201610658414 A CN201610658414 A CN 201610658414A CN 106093460 B CN106093460 B CN 106093460B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a flow velocity measuring device, comprising: a sphere; a frame for supporting the ball; the flexible hinge combination is connected with the frame through the sphere, the flexible hinge combination can respectively generate elastic deflection around an x axis, a y axis and a z axis, and the x axis, the y axis and the z axis are three vertical coordinate axes taking the circle center of the sphere as a coordinate origin; and the sensor is used for sensing the elastic deflection generated by the flexible hinge combination around the x axis, the y axis and the z axis respectively. By the arrangement, the flow velocity measuring device provided by the invention can be suitable for three-dimensional flow velocity measurement, and the measurement precision is higher.
Description
Technical Field
The invention relates to the technical field of fluid measuring equipment, in particular to a flow velocity measuring device.
Background
The flow velocity measuring device is mainly used for measuring the flow velocity of gas and liquid, and most of the flow velocity measuring devices in the prior art are mechanical rotating type measuring devices. The measurement principle of this flow rate measurement device is to obtain the magnitude of the flow rate by measuring the rotational speed of the interrotor.
However, the mechanical rotary flow rate measuring device needs to work by a rotating pair, has certain friction, needs certain starting flow rate, and is generally not suitable for low-flow rate measurement occasions. And the flow direction is lack of accurate measurement, and the flow velocity measuring device is mainly used for flow velocity measurement in a two-dimensional plane and has a narrow application range.
Therefore, how to solve the problems of low measurement accuracy and narrow application range of the flow rate measurement device in the prior art becomes an important technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a flow velocity measurement device, which is suitable for three-dimensional flow velocity measurement and has high measurement accuracy.
The invention provides a flow velocity measuring device, comprising:
a sphere;
a frame for supporting the ball;
the flexible hinge combination is connected with the frame through the sphere, the flexible hinge combination can respectively generate elastic deflection around an x axis, a y axis and a z axis, and the x axis, the y axis and the z axis are three vertical coordinate axes taking the circle center of the sphere as a coordinate origin;
and the sensor is used for sensing the elastic deflection generated by the flexible hinge combination around the x axis, the y axis and the z axis respectively.
Preferably, the flexible hinge combination comprises four flexible hinges, and the connection points of the four flexible hinges and the sphere are located on two of the x-axis and two of the y-axis;
a pair of said flexible hinges having connection points to said sphere on said x-axis comprising: a first deflection part which can deflect around the y axis and is connected with the sphere, and a second deflection part which is connected with the first deflection part and the frame and can deflect around the z axis;
a pair of said flexible hinges having connection points to said sphere on said y-axis comprising: a third deflection portion connected to the ball and capable of deflecting about the x-axis, and a fourth deflection portion connected to the third deflection portion and the frame and capable of deflecting about the z-axis.
Preferably, the number of the second deflection parts is two, and the two second deflection parts are respectively connected to two side positions of the first deflection part; the number of the fourth deflection parts is two, and the fourth deflection parts are respectively connected to two side positions of the third deflection part.
Preferably, the sphere is a hollow sphere.
Preferably, the flexible hinge is a straight beam type flexible hinge, and the inductor is disposed at a minimum width position of the straight beam type flexible hinge.
Preferably, the frame and the flexible hinge are of a unitary construction.
Preferably, the frame and the flexible hinge are formed by a wire cutting process.
Preferably, the frame is a square frame, and four flexible hinges are respectively connected to four edges of the frame.
Preferably, the centre of the sphere coincides with the centre of the frame.
Preferably, the second deflecting portion and the fourth deflecting portion are formed by machining a frame of the frame.
According to the technical scheme, the sphere is placed in a flow field to induce three-dimensional flow velocity, when fluid acts on the sphere, acting force of the fluid can be decomposed into decomposing force parallel to the x axis, the y axis and the z axis, under the action of the three decomposing force, the flexible hinge combination generates slight elastic deflection around the x axis, the y axis and the z axis, the sensor is used for inducing elastic deflection quantity generated by the flexible hinge combination around the x axis, the y axis and the z axis respectively, namely the magnitude of the decomposing force in the three directions can be calculated, finally, the measured component forces in the x direction, the y direction and the z direction are synthesized, the magnitude of the acting force of the fluid received by the sphere can be obtained, and the magnitude and the direction of the flow velocity of the flow field can be calculated in a reflecting mode. Therefore, the flow velocity measuring device provided by the invention can be suitable for three-dimensional flow velocity measurement, and the measurement precision is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an overall flow rate measuring device according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of four flexible hinges in an embodiment of the invention;
FIG. 3 is a partial schematic view of a flexible hinge according to an embodiment of the present invention;
in fig. 1-3:
ball-11, frame-12, inductor-13, flexible hinge-14, first deflection-15, second deflection-16, third deflection-17, fourth deflection-18, threaded hole-19.
Detailed Description
An object of the present embodiment is to provide a flow velocity measurement device which can be applied to three-dimensional flow velocity measurement and has high measurement accuracy.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1-3, the flow rate measuring device provided in the present embodiment includes a ball 11, a frame 12, a flexible hinge assembly, and a sensor 13.
Wherein, frame 12 is used for supporting spheroid 11, and spheroid 11 is connected with frame 12 through flexible hinge combination, and when spheroid 11 receives the effort of fluid, spheroid 11 produces the deflection, and then makes flexible hinge combination produce the deflection. The flexible hinge assembly provided by this embodiment can elastically deflect around the x-axis, the y-axis, and the z-axis, respectively, where the x-axis, the y-axis, and the z-axis are three perpendicular coordinate axes using the center of the sphere 11 as the origin of coordinates.
When fluid acts on the sphere 11, the acting force of the fluid can be decomposed into decomposition forces parallel to the x-axis, y-axis and z-axis directions, and under the three decomposition forces, the flexible hinge assembly will generate slight elastic deflection around the x-axis, y-axis and z-axis, and the embodiment further includes a sensor 13 for sensing the elastic deflection generated by the flexible hinge assembly around the x-axis, y-axis and z-axis, respectively.
In the technical scheme provided by the invention, the sphere 11 is placed in a flow field to induce a three-dimensional flow velocity, when a fluid acts on the sphere 11, the acting force of the fluid can be decomposed into decomposition forces parallel to the x axis, the y axis and the z axis, under the action of the three decomposition forces, the flexible hinge combination generates a small amount of elastic deflection around the x axis, the y axis and the z axis, the sensor 13 is used for inducing the elastic deflection quantity generated by the flexible hinge combination around the x axis, the y axis and the z axis respectively, so that the magnitude of the decomposition forces in the three directions can be calculated, and finally, the measured component forces in the x direction, the y direction and the z direction are synthesized to obtain the magnitude of the acting force of the fluid on the sphere 11, so that the magnitude and the direction of the flow velocity are calculated in a reflecting manner. Therefore, the flow velocity measurement device provided by the embodiment can be suitable for three-dimensional flow velocity measurement, and the measurement accuracy is high.
In a preferred embodiment of the present invention, the flexible hinge assembly includes four flexible hinges 14, and the connection points of the four flexible hinges 14 and the sphere 11 are two on the x-axis and two on the y-axis, that is, the connection points of the four flexible hinges 14 and the sphere 11 are located at four end positions of two perpendicular diameters of the sphere 11, respectively.
The pair of flexible hinges 14 whose connection point to the sphere 11 is located on the x-axis includes a first deflection portion 15 and a second deflection portion 16, and the pair of flexible hinges 14 whose connection point to the sphere 11 is located on the y-axis includes a third deflection portion 17 and a fourth deflection portion 18.
Wherein the first deflection portion 15 is deflectable about the y-axis and is connected to the ball 11, and the second deflection portion 16 is connected to the first deflection portion 15 and the frame 12 and is deflectable about the z-axis. The third deflection portion 17 is deflectable about the x-axis and is connected to the ball 11, and the fourth deflection portion 18 is connected to the third deflection portion 17 and the frame 12 and is deflectable about the z-axis.
With the arrangement, the plane where the four connection points are located is used as a boundary, the sphere 11 is uniformly divided into two parts, and when the sphere 11 is disturbed by fluid and the sphere 11 deflects, the problem of detection misalignment caused by self weight unbalance is avoided. The point of connection to the ball 11 is on the x-axis, a pair of flexible hinges 14, the two points of which support the ball 11 are on the two ends of the diameter of the ball 11, and a first deflection 15 about the y-axis and a second deflection 16 about the z-axis. Furthermore, a pair of flexible hinges 14 whose connection points with the spherical body 11 are located on the y-axis, two points of which supporting the spherical body 11 are located on two end points of the diameter of the spherical body 11, and a third deflection portion 17 is deflectable about the x-axis and a fourth deflection portion 18 is deflectable about the z-axis. The ball 11 is uniformly supported from four directions, and the problem of detection misalignment caused by self weight unbalance when the ball 11 deflects can also be ensured. Moreover, the deflection parts are not influenced by each other, and the accuracy of flow velocity measurement is effectively ensured.
Furthermore, in the present embodiment, two second deflecting portions 16 are respectively connected to two side positions of the first deflecting portion 15; the number of the fourth deflection parts 18 is two, and the four deflection parts are respectively connected to two side positions of the third deflection part 17.
So set up, flexible hinge combination has more deflection portion, has avoided influencing the problem that spheroid 11 deflected because of its self rigidity, has further guaranteed measurement accuracy.
In order to further improve the measurement accuracy, the sphere 11 is a hollow sphere in this embodiment. In this way, ball 11 is of sufficiently light weight that even minor fluid disturbances can deflect ball 11 and thereby measure the flow rate of the fluid.
The flexible hinge 14 in this embodiment is preferably a straight beam type flexible hinge, and the inductor 13 is disposed at a position of a minimum width of the straight beam type flexible hinge. As shown in fig. 3, the minimum width of the straight beam-type flexible hinge is L, and the position of the minimum width L is a deflection portion, and the amount of deflection at that portion can be accurately sensed by providing the sensor 13 at that position.
It should be noted that the frame 12 and the flexible hinge 14 provided in this embodiment may be an integral structure, and specifically, both may be formed by wire cutting, and of course, the frame 12 and the flexible hinge 14 may also be connected together by other means, such as welding, screwing, and the like. The frame 12 may preferably be a square frame 12 with four flexible hinges 14 attached to each of the four sides of the frame 12. Of course, the frame 12 may have other shapes, such as rectangular, circular, etc.
When the shape of frame 12 is the square, further, the centre of sphere of spheroid 11 coincides with the center of frame 12 mutually, so set up, and the distance of spheroid 11 to each limit of frame 12 is equal, and the size of four flexible hinge 14 is unanimous, and when spheroid 11 deflected, can drive each flexible hinge 14 and produce the deflection uniformly, improves and detects the precision.
It should be noted that, in a preferred embodiment of the present invention, the second deflecting portion 16 and the fourth deflecting portion 18 are formed by processing a frame of the frame 12, for example, the second deflecting portion 16 and the fourth deflecting portion 18 may be formed by cutting the frame through a wire, so that the flexible hinge 14 and the frame 12 are an integral structure, and the influence of the two on the detection accuracy due to installation factors can be avoided.
When the flow velocity measuring device provided by the embodiment is used, the frame can be fixed on the speed measuring platform through the bolts or other fixing pieces. Thus, in this embodiment, threaded holes 19 may be provided in the frame to secure the flow rate measuring device.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A flow rate measuring device, comprising:
a spherical body (11);
a frame (12) for supporting the ball (11);
the flexible hinge combination is used for connecting the sphere (11) with the frame (12), the flexible hinge combination can respectively generate elastic deflection around an x axis, a y axis and a z axis, and the x axis, the y axis and the z axis are three vertical coordinate axes taking the circle center of the sphere (11) as a coordinate origin;
a sensor (13) for sensing the amount of elastic deflection of the flexible hinge assembly about the x, y and z axes, respectively; the flexible hinge combination comprises four flexible hinges (14), and the connection points of the four flexible hinges (14) and the ball body (11) are positioned, wherein two of the four flexible hinges are positioned on the x axis, and the other two flexible hinges are positioned on the y axis;
a pair of said flexible hinges (14) having connection points with said sphere (11) on said x-axis comprising: a first deflection unit (15) which can be deflected about the y-axis and is connected to the ball (11), and a second deflection unit (16) which is connected to the first deflection unit (15) and to the frame (12) and can be deflected about the z-axis;
a pair of said flexible hinges (14) having connection points with said sphere (11) on said y-axis comprising: a third deflection unit (17) which can be deflected about the x-axis and is connected to the ball (11), and a fourth deflection unit (18) which is connected to the third deflection unit (17) and to the frame (12) and can be deflected about the z-axis.
2. The flow rate measuring device according to claim 1, wherein the second deflecting portion (16) is two and is connected to both side positions of the first deflecting portion (15); the number of the fourth deflection parts (18) is two, and the four deflection parts are respectively connected to two side positions of the third deflection part (17).
3. A flow rate measuring device according to claim 1 or 2, wherein the ball (11) is a hollow ball.
4. The flow rate measuring device according to claim 1 or 2, wherein the flexural hinge (14) is a straight beam type flexural hinge, and the sensor (13) is provided at a minimum width position of the straight beam type flexural hinge.
5. The flow rate measurement device according to claim 1, wherein the frame (12) is a unitary structure with the flexible hinge (14).
6. The flow rate measuring device according to claim 5, wherein the frame (12) and the flexible hinge (14) are formed by wire cutting.
7. The flow rate measuring device according to claim 1, wherein said frame (12) is a square frame, and four of said flexible hinges (14) are respectively attached to four sides of said frame (12).
8. The flow rate measuring device according to claim 7, wherein the center of the sphere (11) coincides with the center of the frame (12).
9. The flow-rate measuring device according to claim 1, wherein the second deflector (16) and the fourth deflector (18) are both machined from the frame (12) rim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658414.2A CN106093460B (en) | 2016-08-11 | 2016-08-11 | Flow velocity measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658414.2A CN106093460B (en) | 2016-08-11 | 2016-08-11 | Flow velocity measuring device |
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| Publication Number | Publication Date |
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| CN106093460A CN106093460A (en) | 2016-11-09 |
| CN106093460B true CN106093460B (en) | 2022-04-26 |
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| JP7054328B2 (en) * | 2017-09-11 | 2022-04-13 | Koa株式会社 | Sensor unit and multiple sensors using it |
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