TW201623924A - Paddlewheel flowmeter for detecting flow and detecting method thereof - Google Patents

Abstract

A paddle wheel flowmeter for detecting flow includes a main body and an arithmetic unit, a sensor unit, a rotatory assembly provided in the main body. The rotatory assembly is assembled in the main body stretching into a pipe partially and corresponding to the sensor unit. The rotatory assembly has a shaft and a plural of induction blades disposed at an interval. Each of the inductions blades has a metal piece with different dielectric coefficient, and the metal pieces are arranged in sequence and are sorted accordance with the dielectric coefficients, wherein the fluid drives the inductions blades rotating and are inducted with the sensor unit for generating sensing signals, and the sensing signals will be transferred to the arithmetic unit by the sensor unit. Therefore, the direction of the fluid can be determined by the intensity of the sensing signals are presented in a way of gradually increasing or decreasing.

Description

Detecting the flow direction of the wheeled flowmeter and its detection method 【0001】

The invention relates to a flow sensor, in particular to a 蹼 wheel type flowmeter.

【0002】

The Paddlewheel Flowmeter is a flow sensor mainly comprising a rotor, a bearing, a rotating shaft, a magnet, a main body, a Hall Effect Sensor embedded in the main body, and a sensing circuit board; The rotor is equipped with a magnet, and the induction signal is generated by the excitation of the Hall sensor and the magnet. When the rotor is rotated by the fluid, the magnet embedded in the rotor will rotate, and when the Hall sensor is passed, a pulse signal will be induced to obtain the fluid flow.

[0003]

However, the rotor of the conventional 蹼 wheel type flowmeter must be embedded with a magnetic material. When the liquid to be tested is at a high temperature, due to the Curie Temperature Effect, the magnetic material is liable to be degaussed to cause misjudgment. Furthermore, the conventional 蹼 wheel type flowmeter can only detect the fluid flow, but can not detect the fluid flow direction, which reduces the convenience of use. In addition, when the rotor deposits dirt, the abnormal phenomenon cannot be detected, and the abnormal phenomenon is regularly maintained, so the measurement error is liable to occur.

[0004]

In view of the above, the present inventors have proposed a present invention which is reasonable in design and effective in improving the above-described drawbacks in order to solve the above problems.

[0005]

The invention provides a wheel-type flowmeter capable of detecting the flow direction, wherein the induction blades are respectively provided with metal members having different dielectric constants, and are sequentially arranged on the induction blades, thereby judging the flow direction of the fluid in the pipeline .

[0006]

In order to achieve the above object, the present invention is a wheel-type flowmeter capable of detecting the flow direction, which is used for measuring the flow rate and flow direction of a fluid in a pipeline, the wheel-type flowmeter including a body, an arithmetic unit, and a sense Measuring unit and rotating component. The body is disposed on one side of the pipeline and partially extends into the pipeline; the computing unit is disposed in the body; the sensing unit is disposed in the body and electrically connected to the computing unit; and the rotating component is corresponding to the sensing unit and is disposed in the body In the part of the pipeline, the rotating component comprises a rotating shaft and a plurality of sensing blades spaced around the rotating shaft, the sensing blades are respectively provided with metal parts, the metal parts have different dielectric constants, and the metal parts are sequentially arranged according to the dielectric coefficient ordering In the induction blade; wherein the direction of the rotation of the edge of the induction blade is the flow direction of the fluid, when the fluid in the pipeline flows through the induction blade, the rotation of the induction blade is driven, so that the sensing unit senses the difference The dielectric component of the dielectric coefficient generates a complex sensing signal whose intensity is gradually increased or decreased, and is transmitted to the arithmetic unit for calculation, thereby judging whether the fluid is a forward flow or a reverse flow.

【0007】

The invention also provides a detecting method for detecting a flow direction of a wheeled flowmeter, which is used for determining the degree of induced deterioration of the induction vane of the wheeled flowmeter, the steps of the detecting method comprising: a) The computing unit determines a threshold value (breshold value); b) receives the complex sensing signal whose intensity change is gradually increased or decreased; c) compares the intensity of the sensing signals, and takes a measurement of the most characteristic value And d) the arithmetic unit uses the determination that the measured most characteristic value and the preset value are used for the degree of deterioration.

[0008]

Compared with the prior art, since the metal piece of the 蹼 wheel type flowmeter of the present invention is not a magnetic material, the metal piece is not affected by the high temperature and the measurement result is affected, so it can be applied to measure the flow rate of the high temperature fluid. The accuracy of the measurement; furthermore, the detectable flow direction of the wheeled flowmeter of the invention is based on the metal parts of the induction blade provided with different dielectric coefficients, and the metal parts are sequentially arranged in the induction according to the dielectric coefficient ordering. On the blade, since the sensing signal generates different inductive signal intensity values corresponding to the metal members with different dielectric coefficients, the flow direction of the fluid can be judged as positive by gradually increasing or decreasing the intensity of the sensing signal. Flow or reverse flow to increase ease of use.

[0039]

1‧‧‧蹼 wheeled flowmeter

[0040]

2‧‧‧pipe

[0041]

3‧‧‧Deposited foreign objects

[0042]

10‧‧‧ Ontology

[0043]

101‧‧‧First accommodation space

[0044]

102‧‧‧Second accommodation space

[0045]

20‧‧‧ arithmetic unit

[0046]

21‧‧‧ boards

[0047]

22‧‧‧Signal Conversion Unit

[0048]

23‧‧‧Stabilizer

[0049]

24‧‧‧Transport interface unit

[0050]

30‧‧‧Sensor unit

[0051]

31‧‧‧Inductive components

[0052]

32‧‧‧Capacitive components

[0053]

40‧‧‧Rotating components

[0054]

41‧‧‧ shaft

[0055]

42, 42a, 42b‧‧‧Induction blades

[0056]

43, 43a, 43b‧‧‧metal parts

[0057]

50, 50'‧‧‧ sensing signals

[0058]

500‧‧‧Default

[0059]

500'‧‧‧Measure the most characteristic values

[0060]

501‧‧‧ standard minimum

[0061]

501'‧‧‧Measured minimum

[0062]

504‧‧‧ standard maximum

[0063]

504'‧‧‧Measured maxima

[0064]

D‧‧‧Preset gap value

[0065]

D’‧‧‧Measure gap value

[0066]

A’‧‧‧ area difference value

【0009】

1 is a perspective exploded view of a wheeled flowmeter capable of detecting a flow direction according to the present invention;

[0010]

Figure 2 is a cross-sectional view showing the combination of the slewing wheel flowmeter of the present invention;

[0011]

3 is a block diagram showing the circuit of the present invention for detecting the flow direction of the wheeled flowmeter;

[0012]

4 is a schematic diagram of sensing signals of a wheeled flowmeter capable of detecting flow direction according to the present invention;

[0013]

Figure 5 is a schematic view showing another use of the wheel-type flowmeter capable of detecting the flow direction of the present invention;

[0014]

6 is a schematic diagram of another sensing signal of the detectable flow direction of the wheeled flowmeter of the present invention;

[0015]

7 is a schematic diagram of a sensing signal attenuation curve of the detectable flow direction of the wheeled flowmeter of the present invention;

[0016]

Figure 8 is a second embodiment of the induction blade of the present invention;

[0017]

Figure 9 is a third embodiment of the induction blade of the present invention.

[0018]

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

[0019]

Please refer to FIG. 1 to FIG. 3 , which are respectively a perspective exploded view, a combined cross-sectional view and a circuit block diagram of the detectable flow direction of the wheeled flowmeter of the present invention. The present invention provides a wheeled flowmeter 1 that can detect the flow direction for measuring the flow rate and flow direction of a fluid in a pipeline 2. The wheeled flowmeter 1 includes a body 10, an arithmetic unit 20, a sensing unit 30, and a rotating assembly 40. The body 10 is disposed on one side of the line 2 and partially extends into the line 2. The computing unit 20 and the sensing unit 30 are both disposed in the body 10. The rotating assembly 40 is disposed on the body 10 for contacting the fluid within the line 2.

[0020]

In an embodiment of the invention, the body 10 is a housing and has a first accommodating space 101 and a second accommodating space 102. Further, the body 10 may be made of any of ceramic, heat-resistant polymer material, composite material or metal, but is not limited thereto. In this embodiment, the second accommodating space 102 is formed at one end of the body 10, and the rotating component 40 is disposed in the second accommodating space 102. When the body 10 is assembled in the pipeline 2, the second accommodating space 102 is in communication with the interior of the pipeline 2.

[0021]

The computing unit 20 and the sensing unit 30 are disposed in the first accommodating space 101, and the sensing unit 30 is electrically connected to the computing unit 20. In this embodiment, the arithmetic unit 20 is disposed on a circuit board 21. In addition, the sensing unit 30 is configured as an oscillating circuit, and the sensing unit 30 includes an inductive component 31 and a capacitive component 32 in parallel with the inductive component 31.

[0022]

The rotating assembly 40 includes a rotating shaft 41 and a plurality of sensing blades 42 spaced around the rotating shaft 41. Preferably, the sensing blades 42 are symmetrically distributed with respect to the rotating shaft 41 to provide stable and smooth rotation. In addition, each of the sensing blades 42 is provided with a metal member 43. Further, the metal members 43 have different dielectric constants, and the metal members 43 are sequentially arranged on the sensing blades according to the order of the dielectric coefficients. 42. Preferably, the rotating assembly 40 is disposed in the portion of the body 10 that extends into the conduit 2 corresponding to the sensing unit 30.

[0023]

In the present embodiment, the metal member 43 is embedded in the induction blade 42 to be isolated from the fluid. In actual implementation, the metal member 43 can also be embedded on the surface of the induction blade 42 to be in contact with the fluid.

[0024]

As shown in FIG. 2 , when the fluid in the pipeline 2 flows through the rotating component 40 , the sensing blades 42 are rotated, and the sensing unit 30 is induced. The sensing unit 30 senses the metal member 43 of each of the sensing blades 42 and generates a sensing signal 50 (see FIG. 4). The metal member 43 transmits the sensing signal 50 to the computing unit 20 for operation. Subsequently, the computing unit 20 can perform flow direction determination according to the sensing signals 50, and the determination of the flow direction is described in more detail later.

[0025]

Please refer to FIG. 3 , which is a block diagram of the circuit of the present invention for detecting the flow direction of the wheeled flowmeter. In an embodiment of the invention, the wheeled flowmeter 1 further includes a signal conversion unit 22, a voltage stabilization unit 23, and a transmission interface unit 24. The signal conversion unit 22 is electrically connected to the operation unit 20 and the sensing unit 30. The sensing signals 50 are converted by the signal conversion unit 22 into periodic wave signals (such as square wave signals) and then transmitted to the The arithmetic unit 20 is converted into a flow signal by the operation of the arithmetic unit 20. The voltage stabilizing unit 23 is electrically connected to the arithmetic unit 20 and the signal converting unit 22, respectively. The voltage stabilizing unit 23 mainly outputs a stable DC voltage source and supplies the computing unit 20 and the signal converting unit 22 as power sources. The transmission interface unit 24 is electrically connected to the operation unit 20, and the transmission interface unit 24 receives a conventional message (such as temperature, pressure, vibration, etc.) from the outside to perform operations on the operation unit 20, or provides a conventional signal (such as Communication protocol, etc.).

[0026]

Referring to FIG. 4, it is a schematic diagram of the sensing signal of the detectable flow direction of the wheeled flowmeter of the present invention. After the operation of the wheeled flowmeter 1 of the present invention, the induction vanes 42 are rotated by the flow of the fluid. Since the metal members 43 are sequentially disposed on the sensing blades 42 according to the dielectric coefficient order, the value of the sensing signal 50 generated by the computing unit 20 according to each metal member 43 is gradually increased (ascending order) or Gradually reduced (descending) presentation. Accordingly, the flow direction of the fluid is presented by gradually increasing or decreasing the sensing signals 50 to determine whether it is a forward flow or a reverse flow. For example, when the fluid pushes the sensing blades 42 to rotate counterclockwise, the sensing signals 50 are presented in a stepwise increasing (ascending) manner, and when the sensing signals 50 are presented in a stepwise decreasing (descending) manner, It can be inferred that the flow system pushes the induction vanes 42 to rotate clockwise, thereby knowing the flow direction of the fluid.

[0027]

Furthermore, the wheeled flowmeter 1 of the present invention can be used to determine the degree of induced degradation of the induction blades 42 in addition to detecting fluid flow and flow out. By knowing the degree of deterioration of the induction, the user can thereby sense the degree of deterioration as a basis for maintaining the induction blade 42 of the 蹼 wheel type flowmeter 1. The description of the degree of induced deterioration is described in more detail later.

[0028]

Please refer to FIG. 5 and FIG. 6 simultaneously, which are another schematic diagram of the use of the wheeled flowmeter of the present invention and a schematic diagram of the sensing signal. The 蹼 wheel type flowmeter 1 of the present invention has a wide range of applications, for example, in the pharmaceutical, food or tap water industries, the flow rate of the fluid in the process can be measured by the 蹼 wheel type flow meter 1. Since the wheeled flowmeter 1 is used for a long period of time, the surface of the induction blade 42 of the rotating assembly 40 may deposit foreign objects 3 (as shown in FIG. 5) such as iron filings, hair, fibers, and the like. However, the deposition of foreign matter causes attenuation of the sensing signal, which is the degree of induced degradation in the present invention.

[0029]

When the foreign matter 3 is deposited on the surface of the induction blade 42. The sense signal 50' produced by the wheeled flow meter 1 produces attenuation. As shown in FIG. 5, it shows a comparison of the attenuated sensing signal 50' with the original sensing signal 50.

[0030]

The present invention also provides a detection method for detecting a flow direction of a wheeled flowmeter. The step of the detecting method includes: step a), the computing unit 20 determines a threshold value (Threshold Value) 500 from the sensing signal 50. The preset value 500 is a standard extreme value, such as a standard minimum value 501 or a standard maximum value 504. Step b), receiving a plurality of sensing signals 50' in which the intensity changes of the sensing blades 42 are gradually increased or decreased. In step c), the sensing signals 50' are used for comparison to obtain a measured maximum characteristic value 500', such as a measured minimum value 501' or a measured maximum value 504'. In step d), the arithmetic unit 20 determines the degree of deterioration by using the measured most characteristic value 500' and the preset value 500. For example, when the preset value 500 in step a) is set to the standard maximum value 504, the measured most characteristic value 500' in step c) is the measured maximum value 504'; therefore, in the comparison standard maximum value 504 and after measuring the maximum value 504', if the measured maximum value 504' is less than or equal to the standard maximum value 504, it is determined that the induction is deteriorated, and the induction blade 42 of the wheeled flowmeter 1 must be cleaned and maintained at this time. Homework to maintain correct measurement results.

[0031]

Similarly, when the preset value 500 in step a) is set to the standard minimum value 501, the measured most characteristic value 500' in step c) is the measured minimum value 501; therefore, in the comparison standard minimum value 501 After measuring the minimum value 501', if the measurement minimum value 501' is less than or equal to the standard minimum value 501, it is determined to be inductively degraded. That is, when the sensing signals 50' are attenuated to a certain value, it can be known that the induction blade 42 of the wheeled flowmeter 1 must be cleaned and maintained.

[0032]

In this embodiment, the minimum and maximum values of the first sensing signals 50 of the first wheeled flowmeter 1 are preset values 500 (including a standard minimum value 501 and a standard maximum value 504). The sensing signals 50 ′ measured by the flow meter 1 are compared with the initial sensing signals 50 to determine the degree of induced degradation.

[0033]

It should be noted that the foregoing step a) further includes determining a preset gap value D (not shown), and the detecting method further comprises a step e) and a step f), wherein the step e) is a comparison. The measurement of the most characteristic value 500' and the preset value 500 further yields a measured difference value D', and the step f) is to compare the measured difference value D' with the preset difference value D, thereby determining whether Inductive degradation; that is, when the measured difference value D' is equal to or greater than the preset difference value D, it is determined to be inductive degradation.

[0034]

It should be noted that the degree of inductive deterioration of the present invention can be determined by calculating the integrated area in addition to the extreme values of the sensing signals 50, 50'. In more detail, the standard gap value is set as the area difference value. Moreover, in step d) of the present invention, the integrated area of the signal waveform of the most characteristic value 500' and the preset value 500 may be separately calculated to obtain an area difference value A'. Therefore, the degree of induced deterioration can be judged to be deteriorated when the area difference value A' is equal to or larger than the standard gap value.

[0035]

Please refer to FIG. 7 again, which is an attenuation curve of the sensing signal of the wheeled flowmeter of the present invention. The degree of inductive degradation of the present invention can also be judged by using the attenuation curve of the sensing signal. As shown in FIG. 7, it displays the measured values of the sensing signals 50, 50' (preferably, the extreme maximum or minimum values) at different times. As can be seen from the figure, the sensing signals 50, 50' It is gradually attenuated by a negative slope. In actual implementation, the user can set the degree of inductive degradation to attenuate to a set value and determine that it is degraded. For example, the detecting method of the present invention may further include a step e') for taking a plurality of measured maximum feature values 500' and sorting, and measuring the most characteristic values 500. 'Compared with the preset value 500, wherein the measured most characteristic values 500' are equal to or smaller than the preset value 500, then it is determined to be inductively degraded.

[0036]

It is worth noting that the induction vanes of the rotating assembly of the present invention have a variety of implementations. 8 and 9, which show another embodiment of the induction blade of the present invention; in Fig. 8, the metal member 43a is embedded in the induction blade 42a to be isolated from the fluid, and the induction blade 42a is spaced and separated. Aspect settings. Further, in Fig. 9, the metal members 43b are also embedded in the induction blades 42b, but one side of each of the induction blades 42a is disposed to connect the adjacent induction blades 42a.

[0037]

In general, the inductive blades 42, 42a, 42b of the present invention are symmetrically distributed to provide stable and smooth rotation. In actual implementation, the number and shape of the blades of the inductive blades 42, 42a, 42b are not limited.

[0038]

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and other equivalent variations of the patent spirit of the present invention are all within the scope of the invention.

2‧‧‧pipe

10‧‧‧ Ontology

101‧‧‧First accommodation space

102‧‧‧Second accommodation space

20‧‧‧ arithmetic unit

21‧‧‧ boards

22‧‧‧Signal Conversion Unit

23‧‧‧Stabilizer

24‧‧‧Transport interface unit

30‧‧‧Sensor unit

31‧‧‧Inductive components

32‧‧‧Capacitive components

40‧‧‧Rotating components

41‧‧‧ shaft

42‧‧‧Induction blades

43‧‧‧Metal parts

Claims (13)

[Item 1] A wheel-type flowmeter capable of detecting the flow direction is used for measuring the flow rate and flow direction of a fluid in a pipeline, the wheel-type flowmeter comprising:
a body disposed on one side of the pipeline and partially extending into the pipeline;
An arithmetic unit disposed in the body;
a sensing unit disposed in the body and electrically connected to the computing unit; and a rotating component corresponding to the sensing unit and disposed in a portion of the body extending into the pipeline, the rotating component including a rotating shaft And a plurality of induction blades disposed around the rotating shaft, the induction blades are respectively provided with metal parts, the metal parts have different dielectric constants, and the metal parts are sequentially arranged on the induction blades according to the dielectric coefficient sorting;
The direction of the tangential direction of the edge of the induction blade is the flow direction of the fluid. When the fluid in the pipeline flows through the induction blade, the rotation of the induction blade is driven to cause the sensing unit to sense the metal having different dielectric constants. The plurality of sensing signals whose intensity is gradually increased or decreased are transmitted to the arithmetic unit for calculation, thereby judging whether the fluid is a forward flow or a reverse flow. [Item 2] The traversable flow wheel type flowmeter according to claim 1, wherein the body is made of any one of ceramic, heat-resistant polymer material, composite material or metal. [Item 3] The detectable flow direction of the wheeled flowmeter according to claim 1, wherein the sensing blades are symmetrically distributed with respect to the rotating shaft. [Item 4] The detectable flow direction of the wheeled flowmeter according to claim 1, wherein the sensing blades are symmetrically distributed with respect to the rotating shaft. [Item 5] The detectable flow direction of the wheeled flowmeter of claim 1, wherein the metal member is embedded on the surface of the induction vane and is in contact with the fluid. [Item 6] The oscillating flowmeter of the inductive flow according to claim 1, wherein the sensing unit is an oscillating circuit, and the sensing unit comprises an inductive component and a capacitive component in parallel with the inductive component. [Item 7] The oscillating flowmeter of the present invention, further comprising a signal conversion unit, the signal conversion unit is electrically connected to the sensing unit and the computing unit, and the sensing signal is converted by the signal The unit is converted into a periodic wave signal and then transmitted to the arithmetic unit, and converted into a flow signal by the operation of the arithmetic unit. [Item 8] The oscillating wheel type flowmeter of claim 1, further comprising a voltage stabilizing unit, wherein the voltage stabilizing unit is electrically connected to the computing unit and the signal converting unit, and the voltage stabilizing unit outputs a stable The DC voltage source is supplied to the arithmetic unit and the signal conversion unit. [Item 9] The traversable flowmeter of the trajectory as described in claim 1, further comprising a transmission interface unit for receiving an external message or providing information to the operation unit, wherein the transmission interface unit is electrically connected to the operation unit, And the computing unit transmits the sensing signal to the outside through the transmission interface unit. [Item 10] A detecting method for detecting a flow wheel type flowmeter using any one of claims 1 to 9, which is for determining whether an induction blade of the wheeled flowmeter is inductively deteriorated, the detecting method The steps include:
a) determining a preset value in the arithmetic unit;
b) receiving a complex sensing signal whose intensity change is gradually increasing or decreasing;
c) comparing the intensities of the sensing signals and taking a measurement of the most characteristic values;
d) The arithmetic unit uses the determination that the most characteristic value is measured and the predetermined value is used for the degree of deterioration. [Item 11] The method of claim 10, wherein the step a) further comprises determining a preset gap value, the detecting method further comprising a step e) and a step f), wherein the step e) is The most characteristic value and the preset value are measured to obtain a measurement gap value, and the step f) is to compare the measurement gap value and the preset gap value to determine the induced degradation. [Item 12] The method as claimed in claim 10, further comprising a step e'), wherein the plurality of measured maximum feature values are obtained and sorted, and the most characteristic values are compared with the measured The preset values are compared, wherein when the most characteristic values of the measurements are equal to or smaller than the preset value, it is determined to be inductive degradation. [Item 13] The method of claim 10, wherein the preset value and the measured most characteristic value respectively have a signal waveform, and step d) includes separately measuring the most characteristic value and the preset value signal. The waveform calculates the integrated area and derives an area difference value that is equal to or greater than a standard gap value to determine the induced degradation.