阅读说明：本技术 一种流速测量系统 (Flow velocity measuring system ) 是由 邢伟华 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种流速测量系统,包括：壳体,所述壳体内设有流体通道；弹性装置,所述弹性装置设置在流体通道内,所述弹性装置能够在弹性作用下保持在初始位置,并能够在流经所述流体通道的流体的施力作用下相对于所述壳体移动以产生物理变量；处理系统,用于获取所述物理变量并根据所述物理变量计算所述流体的流速,本发明提高了流体流速测量的准确性和量程范围。(The invention discloses a flow velocity measuring system, comprising: a housing having a fluid passage therein; elastic means disposed within the fluid channel, the elastic means being capable of being held in an initial position by an elastic force and being capable of being moved relative to the housing by a force of a fluid flowing through the fluid channel to generate a physical variable; the processing system is used for acquiring the physical variable and calculating the flow rate of the fluid according to the physical variable.)

1. A flow rate measurement system, comprising:

a housing having a fluid passage therein;

elastic means disposed within the fluid channel, the elastic means being capable of being held in an initial position by an elastic force and being capable of being moved relative to the housing by a force of a fluid flowing through the fluid channel to generate a physical variable;

and the processing system is used for acquiring the physical variable and calculating the flow rate of the fluid according to the physical variable.

2. The flow rate measurement system according to claim 1, wherein the elastic device includes a slide rail, and an elastic member, the slide rail is disposed in the fluid passage and is disposed along an axial direction of the fluid passage, the baffle is slidably disposed on the slide rail, the elastic member is connected between the baffle and the housing, the elastic member is capable of applying an elastic force to the baffle so that the baffle can be held at the initial position, and the baffle is capable of sliding along the slide rail under a force of the fluid flowing through the fluid passage so that the elastic device generates the physical variable.

3. The system for measuring the flow rate of a fluid according to claim 2, wherein the elastic device further comprises a deformation sensor, the deformation sensor is connected with the processing system, the baffle plate can slide along the slide rail under the action of a force applied by a fluid flowing through the fluid channel so as to drive the deformation sensor to generate a deformation quantity, and the deformation sensor is used for converting the deformation quantity into an electrical signal variable and providing the electrical signal variable to the processor;

the physical variable is the electrical signal variable, and the processor is configured to calculate a flow rate of the fluid from the electrical signal variable.

4. The flow velocity measurement system according to claim 3, wherein the deformation sensor is connected to the elastic member, the baffle is capable of sliding along the slide rail under the force of the fluid flowing through the fluid channel to drive the elastic member to deform, and the deformation sensor is capable of generating the deformation amount in a state where the elastic member deforms.

5. The flow velocity measurement system according to claim 4, wherein the elastic member includes a spring and an elastic deformation member, a first end of the elastic deformation member is connected to the housing, a second end of the elastic deformation member is slidably connected to the slide rail, the spring is disposed along a length direction of the slide rail and clamped between the second end of the elastic deformation member and the baffle, the deformation sensor is connected to the elastic deformation member, the baffle can slide along the slide rail under a force application effect of the fluid flowing through the fluid channel, so that the second end of the elastic deformation member is driven by the spring to slide along the slide rail, the elastic deformation member deforms, and the deformation sensor can generate the deformation amount in a state where the elastic deformation member deforms.

6. The flow rate measurement system according to claim 3, wherein the deformation sensor is a resistance strain gauge sensor, and the electrical signal variable is a voltage variable.

7. The flow rate measurement system according to claim 6, wherein the elastically deforming member is a reed, and the resistance strain gauge sensor is attached to a side of the reed.

8. The flow rate measurement system according to claim 7, further comprising a support frame, wherein the support frame is connected to the housing, the first end of the reed is connected to the support frame, a connection surface is formed on the support frame, an accommodation groove is formed on the connection surface, the reed can be attached to the connection surface in a state where the baffle is in the initial position, the resistance strain sensor corresponds to a position of the accommodation groove, and the resistance strain sensor can enter the accommodation groove in a state where the amount of deformation is generated.

9. The flow rate measurement system of claim 6, further comprising a pressure sensor and a temperature sensor, the pressure sensor being coupled to the processing system, the pressure sensor being configured to sense a pressure parameter experienced by an inner wall of the fluid channel and provide the pressure parameter to the processing system;

the temperature sensor is connected with the processing system and used for sensing the temperature parameter of the fluid flowing through the fluid channel and providing the temperature parameter to the processing system;

the processing system is used for calculating the flow rate of the fluid according to the voltage variable, the pressure parameter and the temperature parameter.

10. Flow rate measurement system according to any one of claims 1-9, wherein the fluid channel is provided with an inlet, the resilient means being capable of closing the fluid channel in the state of the initial position.

Technical Field

The invention relates to the technical field of fluid measurement, in particular to a fluid measurement system.

Background

In the field of fluid measurement, the higher the flow rate, the easier the measurement is, the most difficult technical problem is the measurement of the micro flow rate, and the measurement accuracy of the existing flow rate measuring instrument is poor to the micro flow rate, so that the problem of small measuring range is caused.

Disclosure of Invention

The invention provides a flow velocity measurement system which improves the accuracy and the range of measurement of the flow velocity of fluid.

In order to solve the above technical problem, the present invention provides a flow velocity measurement system, including: a housing having a fluid passage therein; elastic means disposed within the fluid channel, the elastic means being capable of being held in an initial position by an elastic force and being capable of being moved relative to the housing by a force of a fluid flowing through the fluid channel to generate a physical variable; and the processing system is used for acquiring the physical variable and calculating the flow rate of the fluid according to the physical variable.

Preferably, in the above technical solution, the elastic device includes a baffle, a slide rail, and an elastic member, the slide rail is disposed in the fluid channel and is disposed along an axial direction of the fluid channel, the baffle is slidably disposed on the slide rail, the elastic member is connected between the baffle and the housing, the elastic member can apply an elastic force to the baffle so that the baffle can be maintained at the initial position, and the baffle can slide along the slide rail under the force application effect of the fluid flowing through the fluid channel so that the elastic device generates the physical variable.

Preferably, the elastic device further comprises a deformation sensor, the deformation sensor is connected with the processing system, the baffle can slide along the slide rail under the action of force applied by fluid flowing through the fluid channel to drive the deformation sensor to generate a deformation quantity, and the deformation sensor is used for converting the deformation quantity into an electrical signal variable and providing the electrical signal variable to the processor; the physical variable is the electrical signal variable, and the processor is configured to calculate a flow rate of the fluid from the electrical signal variable.

Preferably, as for the above technical solution, the deformation sensor is connected to the elastic member, the baffle plate can slide along the slide rail under the force application effect of the fluid flowing through the fluid channel to drive the elastic member to deform, and the deformation sensor can generate the deformation amount in a state that the elastic member deforms.

As above-mentioned technical scheme's preferred, the elastic component includes spring and elastic deformation spare, the first end of elastic deformation spare is connected on the casing, the second end of elastic deformation spare with slide rail sliding connection, the spring is followed the length direction of slide rail sets up and press from both sides and establish the second end of elastic deformation spare with between the baffle, deformation sensor connects elastic deformation spare is last, the baffle can flow through follow under the force application effect of fluid passage the slide rail slides, with through the spring drives the second end of elastic deformation spare is followed the slide rail slides, makes elastic deformation spare produces deformation, deformation sensor can produce under the state that elastic deformation spare produced deformation the deformation volume.

Preferably, in the above technical solution, the deformation sensor is a resistance strain type sensor, and the electrical signal variable is a voltage variable.

Preferably, in the above technical solution, the elastic deformation member is a reed, and the resistance strain type sensor is attached to one side of the reed.

As above-mentioned technical scheme's preferred, fluid measurement system still includes the support frame, the support frame with the casing is connected, the first end of reed with the support frame is connected, be formed with on the support frame and connect the face, be formed with the holding tank on connecting the face, the reed can the baffle is in under the state of initial position with connect the face and laminate mutually, resistance strain gauge sensor with the position of holding tank is corresponding, resistance strain gauge sensor can produce get into under the state of deformation volume in the holding tank.

Preferably, the fluid measuring system further includes a pressure sensor and a temperature sensor, the pressure sensor is connected to the processing system, and the pressure sensor is configured to sense a pressure parameter received by an inner wall of the fluid channel and provide the pressure parameter to the processing system; the temperature sensor is connected with the processing system and used for sensing the temperature parameter of the fluid flowing through the fluid channel and providing the temperature parameter to the processing system; the processing system is used for calculating the flow rate of the fluid according to the voltage variable, the pressure parameter and the temperature parameter.

Preferably, in the above-described aspect, the fluid passage is provided with an inlet, and the elastic device is capable of closing the fluid passage in the initial position.

The invention provides a fluid measuring system, wherein an elastic device arranged in a fluid channel is kept at an initial position under the action of elasticity, when fluid passes through the fluid channel, the fluid can flow through the elastic device and apply force to the elastic device, the elastic device can move relative to a shell under the action of the force applied by the fluid to generate a physical variable, a processing system acquires the physical variable, the flow rate of the fluid is in direct proportion to the physical variable, namely the elastic device is stressed greatly when the flow rate of the fluid is high, so that a large physical variable can be generated, and the elastic device is stressed slightly when the flow rate of the fluid is low, so that the generated physical variable is also small, the processing system can obtain the linear relation between the flow rate of the fluid and the physical variable through calculation, and the flow rate of the fluid can be accurately calculated through the linear relation and the physical variable. The elastic device moves relative to the shell to generate the physical variable even when the flow rate of the fluid is small, so that the accuracy of the flow rate measuring system for measuring the tiny flow rate is improved, and the measuring range of the flow rate measuring system is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Fig. 1 is a schematic structural diagram of a flow rate measurement system according to an embodiment of the present invention.

Description of reference numerals: 100. a housing; 101. an outlet; 102. an inlet; 103. a support frame; 104. accommodating grooves; 105. a valve seat; 106. a fluid channel; 200. an elastic device; 201. a spring; 202. an elastic deformation member; 300. a slide rail; 400. a baffle plate; 500. a pressure sensor; 600. a temperature sensor; 700. a flow guide pipe; 800. a processing system; 900. a battery case.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent 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.

Referring to fig. 1, the present invention provides a flow rate measurement system including:

a housing 100, a fluid passage 106 being provided in the housing 100;

an elastic device 200, the elastic device 200 being disposed in the fluid channel 106, the elastic device 200 being capable of being held at an initial position by an elastic force and being capable of being moved relative to the housing 100 by a force of the fluid flowing through the fluid channel 106 to generate a physical variable;

a processing system 800 for acquiring physical variables and calculating flow rates of the fluids based on the physical variables.

In this embodiment, since the elastic means 200 provided in the fluid passage 106 is maintained at the initial position by the elastic force, when the fluid channel 106 is passing through the fluid, the fluid will flow through the elastic device 200 and exert a force on the elastic device 200, the elastic device 200 will move relative to the housing 100 under the force of the fluid, so as to generate a physical variable, the processing system 800 obtains the physical variable, since the flow rate of the fluid is proportional to the physical variable, i.e., a large flow rate of fluid, the resilient means 200 is subjected to a large force, thereby creating a large physical variable, when the flow rate of the fluid is small, the elastic means 200 is less stressed, the physical variables that occur are also smaller, the processing system 800 is therefore calculated to obtain a linear relationship between the flow rate of the fluid and the physical variable by which the flow rate of the fluid can be accurately calculated. Since the elastic means 200 is moved relative to the housing 100 to generate the physical variable even when the flow rate of the fluid is small, the accuracy of the flow rate measurement system for minute flow rate measurement is improved, thereby improving the range of flow rate measurement of the flow rate measurement system.

In a further embodiment, the elastic device 200 includes a baffle 400, a sliding rail 300, and an elastic member, wherein the sliding rail 300 is disposed in the fluid channel 106 and is disposed along an axial direction of the fluid channel 106, the baffle 400 is slidably disposed on the sliding rail, the elastic member is connected between the baffle 400 and the housing 100, the elastic member is capable of applying an elastic force to the baffle 400 so that the baffle 400 can be maintained at an initial position, and the baffle 400 is capable of sliding along the sliding rail 300 under the force of the fluid flowing through the fluid channel 106 so that the elastic device 200 generates a physical variable.

In this embodiment, the guide rail 300 guides the movement of the baffle 400, and the elastic member is connected between the baffle 400 and the housing 100, the slide rail is arranged along the axial direction of the fluid channel 106, and the fluid flowing through the fluid channel 106 applies force to the baffle 400 to move the baffle 400 along the guide rail 300, so that the elastic member is applied force to elastically deform the elastic member to generate a physical variable, thereby the structure of the elastic device 200 is simpler, and the movement of the baffle 400 is stable, which is beneficial to improving the accuracy of flow rate measurement.

Specifically, the sliding rail 300 in this embodiment is a rod body disposed along the axial direction of the fluid channel, the rod body is fixedly disposed in the fluid channel 106, the cross section of the rod body may be any regular shape, such as rectangular, circular, polygonal, and the like, and the baffle 400 is provided with a mounting hole, the mounting hole may form a sliding fit with the rod body, specifically, the cross section of the hole corresponds to the cross section of the rod body, and the size of the hole is slightly larger than the cross sectional area of the rod body.

In a further alternative embodiment, the elastic device 200 further includes a deformation sensor, the deformation sensor is connected to the processing system 800, the baffle 400 can slide along the slide rail under the force of the fluid flowing through the fluid channel to drive the deformation sensor to generate a deformation amount, and the deformation sensor is configured to convert the deformation amount into an electrical signal variable and provide the electrical signal variable to the processor. The physical variable is an electrical signal variable and the processor is configured to calculate a flow rate of the fluid based on the electrical signal variable.

Slide along the slide rail through baffle 400 and produce the deformation volume in order to drive deformation sensor, deformation sensor can turn into the deformation volume into the electrical signal variable simultaneously, consequently does benefit to and improves the accuracy that the deformation volume turned into the electrical signal variable, and the treater can calculate fluidic velocity of flow according to the electrical signal variable simultaneously, further does benefit to and improves measuring accuracy. Of course, the physical variable may be the displacement amount, displacement speed, deformation amount, displacement amount, and the like of the damper 400.

In a further alternative embodiment, the deformation sensor is connected to the elastic member, the baffle 400 can slide along the slide rail 300 under the force of the fluid flowing through the fluid channel 106 to drive the elastic member to deform, and the deformation sensor can generate a deformation amount in a deformed state of the elastic member.

Deformation sensor in this embodiment sets up on the elastic component, and deformation through the elastic component drives deformation sensor and produces deformation, can reduce the impact to deformation sensor, has reduced the loss to deformation sensor, has improved the reliability that velocity of flow measurement system used.

In further can the implementation, the elastic component includes spring 201 and elastic deformation piece 202, the first end of elastic deformation piece 202 is connected on the casing, the second end and the slide rail 300 sliding connection of elastic deformation piece 202, spring 201 sets up and presss from both sides between the second end and the baffle 400 of elastic deformation piece 202 along the length direction of slide rail 300, deformation sensor connects on elastic deformation piece, the baffle can flow through the fluid of fluid channel's force application effect slides along the slide rail down to drive through the spring the second end of elastic deformation piece slides along the slide rail, makes elastic deformation piece produce deformation, deformation sensor can produce the deformation volume under the state that elastic deformation piece produced deformation.

The elastic member in this embodiment includes a spring 201 and an elastic deformation member 202, in the process of flowing fluid through the fluid channel 106, the baffle 400 is driven by the fluid to move along the slide rail 300, and the baffle 400 moves to compress the spring 201 to generate elastic deformation, then the spring 201 applies an elastic force to the elastic deformation member 202 to make the second end of the elastic deformation member 202 slide along the slide rail 300, because the first end of the elastic deformation member is connected to the housing, when the second end of the elastic deformation member 202 slides along the slide rail 300, the elastic deformation member 202 can deform, thereby causing deformation of the deformation sensor, because the spring 201 can apply an elastic force to the elastic deformation member 202 to make the elastic deformation member 202 deform even in a state of a very small flow rate, thereby further improving the accuracy and the range of measurement, in addition, applying an elastic force to the elastic deformation member 202 by the spring 201 can avoid the elastic deformation member 202 from being damaged due to an excessive impact, the reliability of the use of the flow rate measurement system is further improved.

Specifically, the spring 201 in this embodiment is sleeved on the sliding rail 300, a first end of the spring 201 is in contact with the baffle 400, and a second end of the spring 201 is in contact with the elastic deformation member 202, and the elastic deformation member 202 in this embodiment has a through hole, the sliding rail 300 is inserted in the through hole, and the sliding rail 300 is in sliding fit with the through hole.

In a further embodiment, the deformation sensor is a resistance strain sensor and the electrical signal variable is a voltage variable.

The deformation sensor adopts resistance strain type sensor, combines the concrete structure in this embodiment, adopts resistance strain type sensor to have the fault rate low, characteristics that measurement accuracy is high. Of course, the deformation sensor may also be a capacitor, a first plate of the capacitor is connected to the housing 100, a second plate of the capacitor is connected to the elastic deformation member 202, and the second plate of the capacitor can be driven to move relative to the first plate by the deformation of the elastic deformation member 202 to change the distance between the second plate and the first plate, so as to change the capacitance of the capacitor, where the electrical signal variable is the capacitance variable.

In a further alternative embodiment, the elastic deformation element 202 is a spring, and the resistive strain gauge sensor is attached to one side of the spring.

Elastic deformation spare 202 in this embodiment is the reed, the reed can reset fast after taking place to warp, difficult plastic deformation that takes place and lead to elastic deformation spare 202 to damage, in addition, it has great rigidity, consequently under spring 201 transmits elastic force for elastic deformation spare 202's state, elastic deformation spare 202 can take place to warp the very first time, can reduce the error, owing to paste the one side at the reed with resistance strain type sensor, consequently make the deformation volume that produces along with the deformation of reed that resistance strain type sensor can be better, the measuring accuracy has been improved.

In a further practical implementation manner, the flow velocity measurement system further comprises a support frame 103, the support frame 103 is connected with the housing, the first end of the reed is connected with the support frame, a connection surface is formed on the support frame 103, an accommodation groove 104 is formed on the connection surface, the reed can be attached to the connection surface in a state that the baffle 400 is at the initial position, the resistance strain sensor corresponds to the position of the accommodation groove 104, and the resistance strain sensor can enter the accommodation groove in a state of generating a deformation amount.

In this embodiment, the accommodating groove 104 may provide a deformation space for the resistance strain sensor, and in addition, the supporting frame 103 is formed with a connecting surface, and since the reed can be attached to the connecting surface in the state where the baffle 400 is at the initial position, the connecting surface can support the reed, thereby preventing the reed from deforming without receiving the elastic force of the spring 201, and enabling the reed to be always in a stable state, so that the reed can deform at the first time in the process of transmitting the elastic force, and the measurement accuracy is improved.

In addition, the spring plate in this embodiment is perpendicular to the slide rail 300 in a state where the retainer 400 is at the initial position, and the support frame 103 is an L-shaped bracket, and both of the first end and the second end thereof are fixed to the housing 100 by screws.

In a further embodiment, the flow rate measurement system further comprises:

a pressure sensor 500 and a temperature sensor 600, the pressure sensor 500 being connected to the processing system, the pressure sensor 500 being adapted to sense a pressure parameter experienced by the inner wall of the fluid channel 106 and to provide the pressure parameter to the processing system.

The temperature sensor 600 is coupled to the processing system, and the temperature sensor 600 is configured to sense a temperature parameter of the fluid flowing through the fluid channel 106 and provide the sensed temperature parameter to the processing system.

The processing system is used for calculating the flow rate of the fluid according to the voltage variable, the pressure parameter and the temperature parameter.

Because the flow rate is related to the pressure applied to the inner wall of the fluid channel 106 and the temperature of the fluid, in this embodiment, the temperature sensor 600 and the pressure sensor 500 are used to detect the pressure parameter and the fluid temperature parameter applied to the inner wall of the fluid channel 106, and the processing system can perform linear compensation and correction on the linear relationship between the voltage variable and the flow rate by combining the pressure parameter and the temperature parameter, so as to more accurately obtain the voltage variable having a linear relationship with the flow rate, thereby improving the accuracy of measurement.

Specifically, the temperature sensor 600 in the present embodiment is mounted on the housing 100, and its sensing end protrudes into the fluid passage 106, while the housing 100 is provided with the draft tube 700, the draft tube 700 is connected in parallel with the fluid passage, and the pressure sensor 600 is provided on the draft tube 700.

In a further embodiment, the fluid channel 106 is provided with an inlet 102, the resilient means 200 being capable of closing the fluid channel 106 in a state of an initial position.

The elastic device 200 can be used not only to detect the flow rate of the fluid, but also to open and close the fluid channel, and in addition, since the elastic device 200 can close the fluid channel 106 in the initial position, when the fluid flows in from the inlet 102, the elastic device 200 can be applied with force, causing the elastic device 200 to move relative to the housing 100 to generate the physical variable. Therefore, the accuracy of the flow velocity measurement system for measuring the micro flow velocity is improved.

Specifically, the fluid passage 106 in this embodiment is further provided with an outlet 101, the fluid enters from the inlet 102 of the fluid passage and flows out from the outlet 101 of the fluid passage, and in the initial position, the baffle 400 is in the initial position under the action of the spring 201, and the sides of the baffle 400 in the initial position are in contact with the valve seat 105 and form a sealing fit with each other to close the fluid passage.

In addition, the casing 100 in this embodiment is further provided with a battery box 900, the battery box 900 is used for placing a battery, the battery is used as a power supply of the processing system and is connected with the processing system,

in the embodiment, when the fluid enters the fluid channel 106 through the inlet 102, when the fluid enters the fluid channel 106, the fluid channel 106 is opened, the fluid entering the fluid channel 106 drives the baffle 400 to move along the fluid flowing direction, the spring 201 is compressed during the fluid moving process, the spring 201 applies an elastic force to the second end of the elastic deformation member 202 so that the second end of the elastic deformation member 202 moves along the fluid flowing direction to bend and deform the elastic deformation member 202, the elastic sensor arranged on the elastic deformation member 202 generates a deformation amount along with the deformation of the elastic deformation member 202, and converts the deformation amount into an electrical signal to be transmitted to a processing system, and the flow rate of the fluid is obtained through calculation of the processing system.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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 invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.