CN110596418A - A Flow Measuring System - Google Patents

Abstract

The invention discloses a flow velocity measurement system, which comprises: a casing, a fluid channel is arranged in the casing; an elastic device, the elastic device is arranged in the fluid channel, and the elastic device can be kept at an initial position under elastic action , and can move relative to the housing under the force applied by the fluid flowing through the fluid channel to generate physical variables; a processing system is used to obtain the physical variables and calculate the physical variables of the fluid according to the physical variables Flow velocity, the invention improves the accuracy and range range of fluid flow velocity measurement.

Description

A Flow Measuring System

technical field

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

Background technique

In the field of fluid measurement, the higher the flow rate, the easier it is to measure. The most technically difficult is the measurement of micro-flow rates. Existing flow rate measuring instruments have poor measurement accuracy for micro-flow rates, which leads to the problem of small ranges.

Contents of the invention

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

In order to solve the above technical problems, the present invention provides a flow rate measurement system, comprising: a casing, a fluid passage is arranged in the casing; an elastic device, the elastic device is arranged in the fluid passage, and the elastic device can remain at the initial position, and can move relative to the housing under the force of the fluid flowing through the fluid channel to generate a physical variable; a processing system is used to obtain the physical variable and calculate according to the physical variable The flow rate of the fluid.

As a preference of the above technical solution, the elastic device includes a baffle, a slide rail and an elastic member, the slide rail is arranged on the fluid passage and arranged along the axial direction of the fluid passage, and the baffle is slidably arranged on On the slide rail, the elastic member is connected between the baffle and the housing, and the elastic member can exert elastic force on the baffle so that the baffle can be kept at the initial position, so The baffle plate can slide along the slide rail under the force of the fluid flowing through the fluid channel so that the elastic device generates the physical variable.

As a preference of the above technical solution, the elastic device further includes a deformation sensor, the deformation sensor is connected with the processing system, and the baffle can slide along the The rail slides to drive the deformation sensor to generate a deformation amount, and the deformation sensor is used to convert the deformation amount into an electrical signal variable and provide it to the processor; the physical variable is the electrical signal variable, and the processing The device is used to calculate the flow rate of the fluid according to the electrical signal variable.

As a preference of the above technical solution, the deformation sensor is connected to the elastic member, and the baffle plate can slide along the slide rail under the force of the fluid flowing through the fluid passage to drive the elastic member Deformation is generated, and the deformation sensor can generate the deformation amount when the elastic member is deformed.

As a preference of the above technical solution, the elastic member includes a spring and an elastic deformation member, the first end of the elastic deformation member is connected to the housing, and the second end of the elastic deformation member slides with the slide rail connected, the spring is arranged along the length direction of the slide rail and sandwiched between the second end of the elastic deformation member and the baffle plate, the deformation sensor is connected to the elastic deformation member, the The baffle can slide along the slide rail under the force of the fluid flowing through the fluid channel, so that the second end of the elastic deformation member slides along the slide rail through the spring, so that the elastic The deformation member is deformed, and the deformation sensor is capable of generating the deformation amount when the elastic deformation member is deformed.

As a preference of the above technical solution, the deformation sensor is a resistance strain sensor, and the electrical signal variable is a voltage variable.

As a preference of the above technical solution, the elastic deformation member is a reed, and the resistance strain sensor is mounted on one side of the reed.

As a preference of the above technical solution, the fluid measurement system further includes a support frame, the support frame is connected to the housing, the first end of the reed is connected to the support frame, and the support frame is formed with A connecting surface, a receiving groove is formed on the connecting surface, and the reed can be attached to the connecting surface when the baffle is in the initial position, and the resistance strain sensor is connected to the receiving groove Corresponding to the position, the resistance strain sensor can enter the accommodation groove under the state of generating the deformation.

As a preference of the above technical solution, the fluid measurement system further includes a pressure sensor and a temperature sensor, the pressure sensor is connected to the processing system, and the pressure sensor is used to sense the pressure parameter on the inner wall of the fluid channel and provided to the processing system; the temperature sensor is connected to the processing system, and the temperature sensor is used to sense the temperature parameter of the fluid flowing through the fluid channel and provide it to the processing system; The processing system is used to calculate the flow rate of the fluid according to the voltage variable, pressure parameter and temperature parameter.

As a preference of the above technical solution, the fluid channel is provided with an inlet, and the elastic device can close the fluid channel in the state of the initial position.

The present invention provides a fluid measurement system. Since the elastic device arranged in the fluid passage is kept at the initial position under the action of elasticity, when the fluid passage passes through the fluid, the fluid will flow through the elastic device and exert force on the elastic device. The elastic device will move relative to the housing under the force of the fluid to generate a physical variable. The processing system obtains the physical variable. Since the flow rate of the fluid is proportional to the physical variable, that is, the greater the flow rate of the fluid, the greater the force on the elastic device. As a result, a large physical variable will be generated, and when the flow rate of the fluid is small, the force on the elastic device will be small, and the physical variable will be small. Therefore, the processing system can obtain the linearity between the flow rate of the fluid and the physical variable after calculation. Through the linear relationship and physical variables, the flow rate of the fluid can be accurately calculated. Since the elastic device moves relative to the housing to generate the physical variable even when the fluid flow rate is small, the measurement accuracy of the flow rate measurement system for small flow rates is improved, thereby increasing the flow rate measurement range of the flow rate measurement system.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

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

Explanation of reference signs: 100, shell; 101, outlet; 102, inlet; 103, support frame; 104, accommodation groove; 105, valve seat; 106, fluid channel; 200, elastic device; 201, spring; 202, elasticity Deformable part; 300, slide rail; 400, baffle; 500, pressure sensor; 600, temperature sensor; 700, diversion tube; 800, processing system; 900, battery box.

Detailed ways

In order to make the purpose, 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 in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1, the present invention provides a flow rate measurement system, comprising:

A housing 100, the housing 100 is provided with a fluid channel 106;

The elastic device 200, the elastic device 200 is arranged in the fluid channel 106, the elastic device 200 can be kept in the initial position under the action of elasticity, and can move relative to the housing 100 under the force of the fluid flowing through the fluid channel 106 to generate physical variable;

The processing system 800 is configured to acquire physical variables and calculate the flow velocity of the fluid according to the physical variables.

In this embodiment, since the elastic device 200 arranged in the fluid passage 106 is kept at the initial position under the action of elasticity, when the fluid passage 106 passes through the fluid, the fluid will flow through the elastic device 200 and apply force to the elastic device 200 , the elastic device 200 will move relative to the casing 100 under the force of the fluid to generate a physical variable, and the processing system 800 obtains the physical variable. Since the flow rate of the fluid is proportional to the physical variable, that is, the larger the flow rate of the fluid, the larger the elastic device 200 The greater the force, the larger the physical variable will be generated. When the flow rate of the fluid is lower, the elastic device 200 will be less stressed and the physical variable will be smaller. Therefore, the processing system 800 can obtain the flow rate of the fluid through calculation. The linear relationship between the physical variable and the linear relationship can accurately calculate the flow rate of the fluid. Since the elastic device 200 moves relative to the housing 100 to generate the physical variable even when the fluid flow rate is small, the measurement accuracy of the flow rate measurement system for small flow rates is improved, thereby increasing the flow rate measurement range of the flow rate measurement system.

In a further possible embodiment, the elastic device 200 includes a baffle 400, a sliding rail 300 and an elastic member. The sliding rail 300 is arranged in the fluid channel 106 and is arranged along the axial direction of the fluid channel 106. The baffle 400 is slidably arranged on the sliding rail. Above, the elastic member is connected between the baffle 400 and the housing 100, and the elastic member can exert an elastic force on the baffle 400 so that the baffle 400 can be kept at the initial position, and the baffle 400 can be controlled by the fluid flowing through the fluid channel 106. Sliding along the sliding rail 300 under the action of applied force to make the elastic device 200 generate physical variables.

In this embodiment, the movement of the baffle 400 is guided by the guide rail 300, 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 passage 106, and the fluid flowing through the fluid passage 106 The fluid exerts a force on the baffle 400 to make the baffle 400 move along the guide rail 300, thereby exerting force on the elastic member to cause elastic deformation to generate a physical variable, thereby making the structure of the elastic device 200 simpler, and the baffle 400 The movement is stable, which is conducive to improving the accuracy of flow rate measurement.

Specifically, the slide rail 300 in this embodiment is a rod body arranged along the axial direction of the fluid channel, and the rod body is fixedly arranged in the fluid channel 106. Furthermore, the cross section of the rod body can be any regular shape, such as a rectangle, a Circular and polygonal, etc., and the baffle 400 is provided with a mounting hole, which can 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 that of the rod body. cross-sectional area.

In a further possible embodiment, the elastic device 200 also includes a deformation sensor, the deformation sensor is connected to the processing system 800, and 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 , the deformation sensor is used to convert the deformation into an electrical signal variable and provide it to the processor. The physical variable is an electrical signal variable, and the processor is used to calculate the flow rate of the fluid according to the electrical signal variable.

The baffle 400 slides along the slide rail to drive the deformation sensor to generate a deformation amount, and the deformation sensor can convert the deformation amount into an electrical signal variable, so it is beneficial to improve the accuracy of the deformation amount into an electrical signal variable, and the processor can be based on the electrical signal. Variable calculation of the flow rate of the fluid further helps to improve the accuracy of measurement. Of course, the physical variable may also be the displacement and displacement speed of the baffle 400 or the deformation and displacement of the elastic member.

In a further possible embodiment, the deformation sensor is connected to the elastic member, and the baffle plate 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. A deformation amount is generated in a state where deformation occurs.

The deformation sensor in this embodiment is arranged on the elastic member, and the deformation of the elastic member drives the deformation sensor to generate deformation, which can reduce the impact on the deformation sensor, reduce the loss of the deformation sensor, and improve the reliability of the flow rate measurement system. .

In a further possible embodiment, the elastic member includes a spring 201 and an elastic deformation member 202, the first end of the elastic deformation member 202 is connected to the housing, the second end of the elastic deformation member 202 is slidably connected with the slide rail 300, and the spring 201 is The length direction of the slide rail 300 is arranged and sandwiched between the second end of the elastic deformation member 202 and the baffle plate 400, the deformation sensor is connected to the elastic deformation member, and the baffle plate can exert force on the fluid flowing through the fluid channel. Sliding along the slide rail under action, so that the second end of the elastic deformation member slides along the slide rail through the spring, so that the elastic deformation member is deformed, and the deformation sensor can generate a deformation amount when the elastic deformation member is deformed.

The elastic member in this embodiment includes a spring 201 and an elastic deformation member 202. When the fluid flows through the fluid channel 106, the baffle plate 400 is driven by the fluid to move along the slide rail 300, and the compression spring 201 becomes elastic when the baffle plate 400 moves. deformation, and 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. Since the first end of the elastic deformation member is connected to the housing, when the first end of the elastic deformation member 202 When the two ends slide along the slide rail 300, the elastic deformation member 202 can be deformed, thereby causing the deformation of the deformation sensor. Since the spring 201 can apply an elastic force to the elastic deformation member 202 even at a very small flow rate, the elastic deformation member 202 Deformation is generated, so it is beneficial to further improve the accuracy of measurement and the range of measurement. In addition, applying elastic force to the elastic deformation member 202 through the spring 201 can avoid the loss of the elastic deformation member 202 due to excessive impact, further improving the flow rate measurement system. reliability.

Specifically, the spring 201 in this embodiment is sleeved on the slide rail 300, the first end of the spring 201 is in contact with the baffle 400, and the second end of the spring 201 is in contact with the elastic deformation member 202, and in this embodiment The elastic deformation member 202 has a perforation, the slide rail 300 is passed through the perforation, and the slide rail 300 is slidably matched with the perforation.

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

The deformation sensor adopts the resistance strain sensor, combined with the specific structure in this embodiment, the resistance strain sensor has the characteristics of low failure rate and high measurement accuracy. Of course, the deformation sensor can also be a capacitor, the first plate of the capacitor is connected to the housing 100, the second plate of the capacitor is connected to the elastic deformation member 202, and the deformation of the elastic deformation member 202 can drive the second electrode plate of the capacitor to be opposite to each other. When the first pole plate moves to change the distance between the second pole plate and the first pole plate, thereby changing the capacitance of the capacitor, the electric signal variable is the capacitance variable.

In a further possible implementation manner, the elastic deformation member 202 is a reed, and the resistance strain sensor is mounted on one side of the reed.

The elastic deformable part 202 in this embodiment is a reed, and the reed can be quickly reset after being deformed, and it is not easy to cause damage to the elastic deformable part 202 due to plastic deformation. In addition, it has a relatively large rigidity, so the spring 201 will In the state where the force is transmitted to the elastic deformation member 202, the elastic deformation member 202 can be deformed at the first time, which can reduce the error. Since the resistance strain sensor is mounted on one side of the reed, the resistance strain sensor can be more accurate. A good amount of deformation is produced along with the deformation of the reed, which improves the accuracy of the measurement.

In a further possible embodiment, the flow rate measurement system further includes a support frame 103, the support frame 103 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 103, and a connection surface is formed on the connection surface. The accommodating groove 104, the reed can be attached to the connection surface when the baffle plate 400 is in the initial position, the resistance strain sensor corresponds to the position of the accommodating groove 104, and the resistance strain sensor can enter the accommodating state under the state of generating deformation. in the slot.

In this embodiment, the accommodating groove 104 can provide a deformation space for the resistance strain sensor. In addition, a connection surface is formed on the support frame 103, and since the reed can be attached to the connection surface when the baffle plate 400 is in the initial position , the connection surface can support the reed, prevent the reed from being deformed without the elastic force of the spring 201, and keep the reed in a stable state, so that the reed can transmit the elastic force The deformation occurs in the first time, which improves the accuracy of measurement.

In addition, the reed in this embodiment is perpendicular to the slide rail 300 when the baffle plate 400 is in the initial position, and the support frame 103 is an L-shaped bracket, and its first end and second end are fixed to the shell by screws. body 100.

In a further possible embodiment, the flow rate measurement system also includes:

The pressure sensor 500 and the temperature sensor 600, the pressure sensor 500 is connected with the processing system, the pressure sensor 500 is used to sense the pressure parameter on the inner wall of the fluid channel 106 and provide it to the processing system.

The temperature sensor 600 is connected with the processing system, and the temperature sensor 600 is used to sense the temperature parameter of the fluid flowing through the fluid channel 106 and provide it to the processing system.

The processing system is used to calculate the flow rate of the fluid from the voltage variable, the pressure parameter and the temperature parameter.

Since the flow rate is related to the pressure on 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 on the inner wall of the fluid channel 106 respectively, and the processing system combines the pressure The parameters and temperature parameters can linearly compensate and correct the linear relationship between the voltage variable and the flow rate, and can more accurately obtain the voltage variable that has a linear relationship with the flow rate, thereby improving the accuracy of measurement.

Specifically, the temperature sensor 600 in this embodiment is installed on the housing 100, and its sensing end extends into the fluid channel 106, and the housing 100 is provided with a guide tube 700, which is connected with the fluid The channels are connected in parallel, and the pressure sensor 600 is arranged on the guide tube 700 .

In a further possible embodiment, the fluid channel 106 is provided with an inlet 102, and the elastic device 200 can close the fluid channel 106 in a state of an initial position.

The elastic device 200 can not only be used to detect the flow rate of the fluid, but also to open and close the fluid channel. In addition, since the elastic device 200 can close the fluid channel 106 in the state of the initial position, when a fluid flows in from the inlet 102 , that is, a force is applied to the elastic device 200 to cause the elastic device 200 to move relative to the casing 100 to generate a physical variable. Therefore, it is beneficial to improve the measurement accuracy of the flow velocity measurement system for tiny flow velocity.

Specifically, the fluid channel 106 in this embodiment is also provided with an outlet 101, the fluid enters from the inlet 102 of the fluid channel, and flows out from the outlet 101 of the fluid channel, and when in the initial position, the baffle plate 400 is on the spring 201 Under the action of the baffle plate 400 at the initial position, one side of the baffle plate 400 at the initial position is in contact with the valve seat 105 and forms a sealing fit with each other to close the fluid passage.

In addition, the housing 100 in this embodiment is also provided with a battery box 900, the battery box 900 is used to place the battery, the battery is used as the power supply of the processing system and is connected with the processing system,

When the present embodiment is working, 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, and the fluid entering the fluid channel 106 drives the baffle plate 400 to move along the fluid flow direction. The spring 201 is compressed during the fluid movement, and 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 direction of fluid flow so that the elastic deformation member 202 is bent and deformed. The elastic sensor 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 and transmits it to the processing system, and the flow rate of the fluid is obtained through calculation by the processing system.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A flow rate measurement system, characterized in that, comprising: a housing, the housing is provided with a fluid channel; an elastic device, the elastic device is arranged in the fluid passage, and the elastic device can be kept at the initial position under the action of elasticity, and can move relative to the housing under the force of the fluid flowing through the fluid passage to produce physical variables; A processing system, configured to obtain the physical variable and calculate the flow rate of the fluid according to the physical variable. 2. The flow velocity measurement system according to claim 1, wherein the elastic device comprises a baffle plate, a slide rail and an elastic member, the slide rail is arranged on the fluid channel, and along the axis of the fluid channel The baffle is slidably arranged on the slide rail, the elastic member is connected between the baffle and the housing, and the elastic member can exert elastic force on the baffle to make the baffle The plate can be maintained at the initial position, and the baffle plate can slide along the slide rail under the force of the fluid flowing through the fluid channel to cause the elastic device to generate the physical variable. 3. The flow velocity measurement system according to claim 2, wherein the elastic device further comprises a deformation sensor, the deformation sensor is connected with the processing system, and the baffle plate can Sliding along the sliding rail under the force of the fluid to drive the deformation sensor to generate a deformation, and the deformation sensor is used to convert the deformation into an electrical signal variable and provide it to the processor; The physical variable is the electrical signal variable, and the processor is used to calculate the flow velocity of the fluid according to the electrical signal variable. 4. The flow velocity measuring system according to claim 3, wherein the deformation sensor is connected to the elastic member, and the baffle plate can move along the force of the fluid flowing through the fluid passage. The slide rail slides to drive the elastic member to deform, and the deformation sensor can generate the deformation amount when the elastic member is deformed. 5. The flow rate measurement system according to claim 4, wherein the elastic member comprises a spring and an elastic deformation member, the first end of the elastic deformation member is connected to the housing, and the elastic deformation member The second end of the slide rail is slidingly connected to the slide rail, the spring is arranged along the length direction of the slide rail and sandwiched between the second end of the elastic deformation member and the baffle plate, and the deformation sensor is connected On the elastic deformation member, the baffle plate can slide along the slide rail under the force of the fluid flowing through the fluid passage, so that the second end of the elastic deformation member is driven by the spring The slide rail slides to deform the elastic deformation member, and the deformation sensor can generate the deformation amount when the elastic deformation member is deformed. 6. The flow velocity measurement system according to claim 3, wherein the deformation sensor is a resistance strain sensor, and the electrical signal variable is a voltage variable. 7 . The flow velocity measurement system according to claim 6 , wherein the elastic deformation member is a reed, and the resistance strain sensor is mounted on one side of the reed. 8. The flow rate measurement system according to claim 7, further comprising a support frame, the support frame is connected to the housing, the first end of the reed is connected to the support frame, and the A connection surface is formed on the support frame, and an accommodation groove is formed on the connection surface, and the reed can be attached to the connection surface when the baffle is at the initial position, and the resistance strain sensor Corresponding to the position of the accommodating groove, the resistance strain sensor can enter the accommodating groove under the state of generating the deformation amount. 9. The flow rate measurement system according to claim 6, further comprising a pressure sensor and a temperature sensor, the pressure sensor is connected to the processing system, and the pressure sensor is used for sensing the inner wall of the fluid channel The pressure parameters subjected to and provided to the processing system; The temperature sensor is connected to the processing system, and the temperature sensor is used to sense the temperature parameter of the fluid flowing through the fluid channel and provide it to the processing system; The processing system is used to calculate the flow rate of the fluid based on the voltage variable, pressure parameter and temperature parameter. 10. The flow rate measurement system according to any one of claims 1-9, wherein the fluid channel is provided with an inlet, and the elastic device can close the fluid channel in the state of the initial position.