Turbine type flow sensor detection precision linearity self-adaptive adjusting method

Abstract

The invention discloses a turbo-type flow sensor detection precision linearity self-adaptive adjusting method, which is realized based on a self-adaptive adjusting turbo-type flowmeter, the self-adaptive adjusting turbo-type flowmeter comprises a shell, a magnetic conduction impeller is coaxially and rotatably arranged in the shell, one side of the shell is provided with a detection coil and a side flow channel, and the other side of the shell is provided with a detection coil and a side flow channel. The side flow channel is communicated with the interior of the shell; a magnetic part is movably arranged on one side of the side flow channel in the radial direction of the shell, one side of the magnetic part makes contact with fluid in the side flow channel, and an elastic part is arranged on the other side of the magnetic part. Fluid flowing through the interior of the side flow channel acts on the magnetic part to drive the magnetic part to move close to or away from the magnetic conduction impeller in the radial direction of the shell so as to regulate and control the braking force applied to the magnetic conduction impeller by the magnetic part, and the rotating speed of the magnetic conduction impeller is regulated and controlled through the braking force. And then linear compensation is carried out on the actual proportion between the actual rotating speed of the magnetic conduction impeller and the actual flow of the fluid in the shell.

Description

Technical Field

[0001] The present invention belongs to the technical field of flow sensors, and particularly relates to a method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor. Background Art

[0002] A turbine flow sensor is a common velocity-type flow measurement instrument. The basic principle is that the rotational speed of an impeller placed in a fluid is proportional to the fluid flow velocity. When the measured fluid flows through the sensor, the kinetic energy of the fluid causes the impeller to rotate, and the rotational speed of the impeller is proportional to the fluid flow velocity. The rotation of the impeller will periodically change the magnetic resistance value in the magnetoelectric induction system, causing the magnetic flux passing through the coil to change periodically, thereby generating an electrical pulse signal. After being amplified by an amplifier, the signal is transmitted to a flow computer for calculating the flow rate or total amount.

[0003] Theoretically, within a certain flow rate range, the rotational speed of the impeller of the turbine flow sensor should be linearly related to the fluid flow velocity. However, in actual situations, affected by factors such as machining accuracy, assembly error, and component aging and wear during long-term use, the relationship between the impeller rotational speed and the fluid flow velocity does not strictly conform to the theoretical expectation, thereby affecting the actual measurement accuracy of the turbine flowmeter.

[0004] Therefore, based on the above-mentioned defects existing in the existing turbine flowmeters, the present invention discloses a method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor. Summary of the Invention

[0005] The present invention discloses a method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor, which can adaptively regulate the rotational speed of the impeller based on the fluid flow velocity, making the proportional relationship between the impeller rotational speed and the fluid flow velocity closer to the theoretical value, thereby improving the measurement accuracy of the turbine flowmeter.

[0006] The present invention is realized through the following technical solutions: A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor is realized based on an adaptive adjustment turbine flowmeter. The adaptive adjustment turbine flowmeter includes a housing. A magnetically conductive impeller is coaxially and rotatably arranged inside the housing. A detection coil and a side flow channel are arranged on one side of the housing, and the side flow channel is communicated with the inside of the housing. A magnetic member is movably arranged along the radial direction of the housing on one side of the side flow channel. One side of the magnetic member is in contact with the fluid inside the side flow channel, and an elastic member is arranged on the other side of the magnetic member. The fluid flowing through the inside of the side flow channel acts on the magnetic member to drive the magnetic member to move closer to or away from the magnetically conductive impeller along the radial direction of the housing to regulate the braking force applied by the magnetic member to the magnetically conductive impeller, and the rotational speed of the magnetically conductive impeller is regulated through the braking force, thereby linearly compensating the actual ratio between the actual rotational speed of the magnetically conductive impeller and the actual flow rate of the fluid inside the housing.

[0007] To better implement the present invention, further, it specifically includes the following steps: Step 1: Calculate the theoretical ratio between the theoretical flow rate of the fluid inside the housing and the theoretical rotational speed of the magnetically permeable impeller, and detect the actual ratio between the actual flow rate of the fluid inside the housing and the actual rotational speed of the magnetically permeable impeller; Step 2: Calculate the braking force that the magnetic part needs to exert on the magnetically permeable impeller through the difference value between the theoretical ratio and the actual ratio; Step 3: Calculate the balance elastic force of the magnetic part according to the braking force and the fluid pressure exerted by the fluid inside the side flow channel on the magnetic part, so that when the fluid pressure and the balance elastic force are balanced, it drives the magnetic part to move to the balance position, and the braking force exerted by the magnetic part on the magnetically permeable impeller when the magnetic part is in the balance position can linearly compensate for the difference value between the theoretical ratio and the actual ratio; Step 4: Calculate the initial elastic force of the magnetic part according to the balance elastic force and the stroke of the magnetic part.

[0008] To better implement the present invention, further, the magnetically permeable impeller rotates to cut the magnetic induction lines of the detection coil, so as to generate a pulse signal proportional to the rotational speed of the magnetically permeable impeller in the detection coil, and calculate the first flow rate of the fluid in the housing through the pulse signal; detect the second flow rate of the fluid inside the housing through a calibrated flowmeter, and determine whether it is necessary to linearly compensate the actual ratio between the actual rotational speed of the magnetically permeable impeller and the actual flow rate of the fluid inside the housing according to the difference between the first flow rate and the second flow rate.

[0009] To better implement the present invention, further, the side flow channel includes an inlet and an outlet, both the inlet and the outlet are connected to the housing, and solenoid valves are arranged in both the inlet and the outlet.

[0010] To better implement the present invention, further, the detection coil is connected to an amplifier circuit, and the amplifier circuit amplifies the pulse signal generated in the detection coil.

[0011] To better implement the present invention, further, the elastic part includes a spring, and an adjusting bolt is arranged inside the spring, and the adjusting bolt is used to adjust the initial elastic force of the spring.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects: By arranging a side flow channel on one side of the housing, the present invention enables part of the fluid to enter the side flow channel, and acts on the magnetic part through the pressure application port on one side of the side flow channel, and then generates pressure through the change in the fluid velocity, so as to drive the magnetic part to move closer to or away from the magnetically permeable impeller, and then linearly regulate the rotational speed of the magnetically permeable impeller based on the fluid velocity, making the relationship between the fluid velocity and the rotational speed of the magnetically permeable impeller closer to the theoretical value, and thus improving the measurement accuracy of the turbine flowmeter. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a turbine flow sensor; Figure 2 It is a schematic installation diagram of a magnetic part; Figure 3 It is a schematic structural diagram of a magnetic part.

[0014] Wherein: 1 - housing; 2 - magnetically conductive impeller; 3 - measuring coil; 4 - side flow channel; 5 - magnetic part; 6 - elastic part; 7 - adjusting bolt. Detailed Implementation Manner

[0015] Example 1: A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor in this embodiment is realized based on an adaptive adjustment turbine flowmeter. The adaptive adjustment turbine flowmeter includes a housing 1, and a magnetically conductive impeller 2 is coaxially and rotatably arranged inside the housing 1. A detection coil 3 and a side flow channel 4 are arranged on one side of the housing 1, and the side flow channel 4 is communicated with the inside of the housing 1; a magnetic part 5 is arranged to move along the radial direction of the housing 1 on one side of the side flow channel 4. One side of the magnetic part 5 is in contact with the fluid inside the side flow channel 4, and an elastic part 6 is arranged on the other side of the magnetic part 5; the fluid flowing through the inside of the side flow channel 4 acts on the magnetic part 5 to drive the magnetic part 5 to move closer to or away from the magnetically conductive impeller 2 along the radial direction of the housing 1 to adjust the braking force applied by the magnetic part 5 to the magnetically conductive impeller 2, and the rotation speed of the magnetically conductive impeller 2 is adjusted through the braking force, and then a linear compensation is performed on the actual ratio between the actual rotation speed of the magnetically conductive impeller 2 and the actual flow rate of the fluid inside the housing 1.

[0016] Specifically, it includes the following steps: Step 1, calculate the theoretical ratio between the theoretical flow rate of the fluid inside the housing 1 and the theoretical rotation speed of the magnetically conductive impeller 2, and detect the actual ratio between the actual flow rate of the fluid inside the housing 1 and the actual rotation speed of the magnetically conductive impeller 2; Step 2, calculate the braking force that the magnetic part 5 needs to apply to the magnetically conductive impeller 2 through the difference value between the theoretical ratio and the actual ratio; Step 3, calculate the balanced elastic force of the magnetic part 5 according to the braking force and the fluid pressure of the fluid inside the side flow channel 4 acting on the magnetic part 5, so that when the fluid pressure and the balanced elastic force are balanced, the magnetic part 5 is driven to move to the balanced position, and the braking force applied by the magnetic part 5 when it is in the balanced position can linearly compensate for the difference value between the theoretical ratio and the actual ratio; Step 4, calculate the initial elastic force of the magnetic part 5 according to the balanced elastic force and the stroke of the magnetic part 5.

[0017] Example 2: This embodiment further optimizes on the basis of Embodiment 1. By rotating the magnetic-conductive impeller 2 to cut the magnetic induction lines of the detection coil 3, a pulse signal proportional to the rotational speed of the magnetic-conductive impeller 2 is generated in the detection coil 3, and the first flow rate of the fluid in the housing 1 is calculated through the pulse signal; the second flow rate of the fluid inside the housing 1 is detected by a calibrated flowmeter, and it is determined whether linear compensation is required for the actual ratio between the actual rotational speed of the magnetic-conductive impeller 2 and the actual flow rate of the fluid inside the housing 1 based on the difference between the first flow rate and the second flow rate.

[0018] The detection coil 3 is connected to an amplifier circuit, and the pulse signal generated in the detection coil 3 is amplified by the amplifier circuit.

[0019] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be described in detail.

[0020] Embodiment 3: This embodiment further optimizes on the basis of the above Embodiment 1 or 2. The side flow channel 4 includes an inlet and an outlet, both the inlet and the outlet are connected to the housing 1, and electromagnetic valves are provided in both the inlet and the outlet.

[0021] Other parts of this embodiment are the same as those of the above Embodiment 1 or 2, so they will not be described in detail.

[0022] Embodiment 4: This embodiment further optimizes on the basis of any one of the above Embodiments 1 - 3. The elastic member 6 includes a spring, and an adjusting bolt 7 is provided inside the spring, and the adjusting bolt 7 is used to adjust the initial elastic force of the spring.

[0023] The opening and closing device 7 includes an electromagnetic valve.

[0024] Other parts of this embodiment are the same as any one of the above Embodiments 1 - 3, so they will not be described in detail.

[0025] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention falls within the protection scope of the present invention.

Claims

1. A method for adaptively adjusting the detection accuracy and linearity of a turbine flow sensor, which is realized based on an adaptive adjustment turbine flowmeter. The adaptive adjustment turbine flowmeter includes a housing (1), inside which a magnetically conductive impeller (2) is coaxially rotatably arranged. A detection coil (3) and a side flow channel (4) are arranged on one side of the housing (1), and the side flow channel (4) is communicated with the inside of the housing (1). A magnetic member (5) is arranged to move radially along the housing (1) on one side of the side flow channel (4). One side of the magnetic member (5) is in contact with the fluid inside the side flow channel (4), and an elastic member (6) is arranged on the other side of the magnetic member (5). It is characterized in that, The fluid flowing through the interior of the side flow passage (4) acts on the magnetic member (5) to drive the magnetic member (5) to move radially close to or away from the magnetic conductive impeller (2) along the housing (1) so as to regulate the magnitude of the braking force applied by the magnetic member (5) to the magnetic conductive impeller (2), and the rotational speed of the magnetic conductive impeller (2) is regulated through the braking force, thereby linearly compensating the actual ratio between the actual rotational speed of the magnetic conductive impeller (2) and the actual flow rate of the fluid inside the housing (1).

2. A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor according to claim 1, characterized in that Specifically, it includes the following steps: Step 1: Calculate the theoretical ratio between the theoretical flow rate of the fluid inside the housing (1) and the theoretical rotational speed of the magnetic conductive impeller (2), and detect the actual ratio between the actual flow rate of the fluid inside the housing (1) and the actual rotational speed of the magnetic conductive impeller (2); Step 2: Calculate the braking force that the magnetic member (5) needs to apply to the magnetic conductive impeller (2) based on the difference value between the theoretical ratio and the actual ratio; Step 3: Calculate the balanced elastic force of the magnetic member (5) according to the braking force and the fluid pressure of the fluid acting on the magnetic member (5) inside the side flow passage (4), so that when the fluid pressure and the balanced elastic force are balanced, the magnetic member (5) is driven to move to the balanced position, and the braking force applied by the magnetic member (5) when it is in the balanced position can linearly compensate the difference value between the theoretical ratio and the actual ratio; Step 4: Calculate the initial elastic force of the magnetic member (5) according to the balanced elastic force and the stroke of the magnetic member (5).

3. A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor according to claim 2, characterized in that The magnetic conductive impeller (2) rotates to cut the magnetic induction lines of the detection coil (3) to generate a pulse signal proportional to the rotational speed of the magnetic conductive impeller (2) in the detection coil (3), and the first flow rate of the fluid in the housing (1) is calculated through the pulse signal; the second flow rate of the fluid inside the housing (1) is detected by a calibrated flow meter, and it is determined whether it is necessary to linearly compensate the actual ratio between the actual rotational speed of the magnetic conductive impeller (2) and the actual flow rate of the fluid inside the housing (1) based on the difference between the first flow rate and the second flow rate.

4. A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor according to claim 3, characterized in that The side flow passage (4) includes an inlet and an outlet, both the inlet and the outlet are connected to the housing (1), and solenoid valves are provided in both the inlet and the outlet.

5. A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor according to claim 4, characterized in that The detection coil (3) is connected to an amplifier circuit, and the pulse signal generated in the detection coil (3) is amplified through the amplifier circuit.

6. A method for adaptively adjusting the detection accuracy linearity of a turbine flow sensor according to claim 5, characterized in that, The elastic member (6) includes a spring, and an adjusting bolt (7) is arranged inside the spring, and the adjusting bolt (7) is used to adjust the initial elastic force of the spring.

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