CN111896067B - Air cylinder, volume measurement system and volume measurement method - Google Patents
Air cylinder, volume measurement system and volume measurement method Download PDFInfo
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- CN111896067B CN111896067B CN202010777273.2A CN202010777273A CN111896067B CN 111896067 B CN111896067 B CN 111896067B CN 202010777273 A CN202010777273 A CN 202010777273A CN 111896067 B CN111896067 B CN 111896067B
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- air cylinder
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- accommodating cavity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
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Abstract
The present invention provides an air reservoir, comprising: the air cylinder comprises an air cylinder body, wherein an accommodating cavity is formed in the air cylinder body, and is provided with an opening which penetrates through the accommodating cavity; and an adjustment assembly, the adjustment assembly comprising: one end of the rotating shaft extends into the accommodating cavity through the opening, the rotating shaft is positioned on a central shaft of the accommodating cavity, the rotating shaft is sealed and rotatably connected with the opening, and one end of the rotating shaft extending into the accommodating cavity is relatively rotatably connected with the air cylinder body; the fixed plate is positioned in the accommodating cavity, the fixed plate is arranged along the radial direction of the accommodating cavity, one side of the fixed plate is abutted against the rotating shaft, and the fixed plate is hermetically and fixedly connected with the air cylinder body; the rotating plate is located and holds the intracavity, and the rotating plate is arranged along holding the chamber radial, and rotating plate one side is connected with the axis of rotation, and the rotating plate is sealed and is connected with the relative removal of reservoir body. The air cylinder provided by the invention can realize volume adjustment and improve the universality of a volume measurement system. The invention also provides a volume measurement system and a volume measurement method.
Description
Technical Field
The invention belongs to the technical field of volume measurement, and particularly relates to an air cylinder, a volume measurement system and a volume measurement method.
Background
At present, when an existing volume measurement system measures a volume to be measured, a standard air cylinder is generally required to be communicated with the volume to be measured, pressure before and after the standard air cylinder is communicated is measured, and the volume to be measured is calculated.
However, in the conventional volume measurement system, when an unknown volume with a large volume difference is measured, different standard air cylinders are required to be used for measurement. If the same standard air cylinder is used for measuring unknown volumes with large volume difference, large measurement errors can be caused, and therefore the universality of the existing volume testing system is poor.
Disclosure of Invention
Aiming at the technical problem that the existing volume test system is poor in universality, the invention provides the air cylinder which can realize volume adjustment and does not need to replace different standard air cylinders aiming at volumes to be tested with different volumes, so that the universality of the volume measurement system is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an air reservoir, comprising:
the air cylinder comprises an air cylinder body, wherein an accommodating cavity is formed in the air cylinder body, an opening is formed in the accommodating cavity, and the opening penetrates through the accommodating cavity;
and an adjustment assembly, the adjustment assembly comprising:
one end of the rotating shaft extends into the accommodating cavity through the opening, the rotating shaft is positioned on a central shaft of the accommodating cavity, the rotating shaft and the opening are relatively sealed and rotatably connected, and one end of the rotating shaft extending into the accommodating cavity is relatively sealed and rotatably connected with the air cylinder body;
the fixed plate is positioned in the accommodating cavity, the fixed plate is arranged along the radial direction of the accommodating cavity, one side of the fixed plate is abutted against the rotating shaft, and the fixed plate is hermetically and fixedly connected with the air cylinder body;
the rotating plate is positioned in the accommodating cavity, the rotating plate is arranged along the radial direction of the accommodating cavity, one side of the rotating plate is connected with the rotating shaft, and the rotating plate and the air cylinder body are relatively sealed and movably connected;
the fixed plate and the rotating plate divide the accommodating cavity into a first cavity and a second cavity which are sealed mutually, a first interface and a second interface are arranged on the air cylinder body, the first interface is communicated with the first cavity, and the second interface is communicated with the second cavity.
Further, still include locking Assembly, locking Assembly includes:
the locking bolt is connected with the air cylinder body and provided with a through hole, the through hole is communicated with the opening, the rotating shaft penetrates through the through hole, a notch groove is formed in the locking bolt, and external threads are arranged on the outer side of the locking bolt;
the locking nut is provided with a threaded through hole and sleeved on the rotating shaft, and the locking nut is connected with the locking bolt through the threaded through hole and the external thread.
Furthermore, the wind cylinder further comprises a limiting part, wherein the limiting part is located in the containing cavity, the limiting part is located between the rotating plate and the fixed plate, and the limiting part is connected with the wind cylinder body.
Furthermore, the wind cylinder further comprises a rotating wheel, and the rotating wheel is connected to one end, extending out of the wind cylinder body, of the rotating shaft.
Furthermore, be provided with the pilot mark on the rotation wheel, be provided with the scale on the reservoir body, the pilot mark with the corresponding setting of scale.
Further, the rotating shaft further comprises a sealing portion, the rotating shaft is vulcanized to form the sealing portion, and the fixing plate is abutted to the rotating shaft through the sealing portion.
The invention also provides a volume measurement system, which comprises the air cylinder and further comprises:
the wind source is arranged on the air duct,
the air source is communicated with the air cylinder through the first gate valve;
a measurement module, the measurement module comprising:
a pressure sensor that measures pressure within the reservoir;
the air cylinder is communicated with the volume to be measured through the second gate valve;
the control module is electrically connected with the air source, the first gate valve, the pressure sensor and the second gate valve;
and the data processing module is electrically connected with the pressure sensor and the control module.
Further, the measurement module further comprises:
and the temperature sensor is used for measuring the temperature in the air cylinder and is connected with the control module and the data processing module.
The invention also provides a volume measurement method, which uses the volume measurement system and comprises the following steps:
step 1: predicting a volume V2 to be measured;
step 2: adjusting the volume V1 of the air reservoir according to the estimated volume V2 to be measured, so that the volume V1 of the air reservoir is similar to the volume V2 to be measured;
and step 3: measuring the pressure P2 in the reservoir;
and 4, step 4: closing the second gate valve R2, opening the first gate valve R1, controlling the air source to introduce a certain amount of compressed air into the air cylinder, and closing the first gate valve R1;
and 5: measuring the pressure P1 of the reservoir;
step 6: opening a second gate valve R2, and communicating the air cylinder with the volume V2 to be measured;
and 7: after stabilization, measuring the pressure P3 of the reservoir;
step 8: and substituting the pressures P1, P2, P3 and the air cylinder volume V1 into P1V1+ P2V 2-P3 (V1+ V2), and calculating to obtain the volume V2 to be measured.
Further, the step 3 further comprises: measuring the temperature T2 of the air reservoir;
the step 5 further comprises: measuring the temperature T1 in the air reservoir;
the step 7 further comprises: after stabilization, measuring the temperature T3 of the air cylinder;
the step 8 is as follows: the pressures P1, P2, P3, the temperatures T1, T2, T3 and the air cylinder volume V1 are substituted into P1V1/T1+ P2V2/T2 which is P3(V1+ V2)/T3, and the volume V2 to be measured is obtained through calculation.
Compared with the prior art, the invention has the beneficial effects that:
1. the air cylinder provided by the invention comprises an air cylinder body and an adjusting assembly. The inside chamber that holds that is formed with of reservoir body holds the chamber, holds the chamber and is provided with the opening, and the opening runs through to holding the chamber. The adjusting assembly comprises a rotating shaft, a fixed plate and a rotating plate, one end of the rotating shaft extends into the accommodating cavity through the opening, the rotating shaft is positioned on a central shaft of the accommodating cavity, the rotating shaft and the opening are relatively sealed and rotatably connected, and one end of the rotating shaft extending into the accommodating cavity is relatively sealed and rotatably connected with the air cylinder body; the fixed plate is positioned in the accommodating cavity, the fixed plate is arranged along the radial direction of the accommodating cavity, one side of the fixed plate is abutted against the rotating shaft, and the fixed plate is hermetically and fixedly connected with the air cylinder body; the rotating plate is located and holds the intracavity, and the rotating plate is arranged along holding the chamber radial, and rotating plate one side is connected with the axis of rotation, and the rotating plate is sealed relatively and be connected with the removal with the reservoir body. The fixed plate and the rotating plate divide the containing cavity into a first cavity and a second cavity which are sealed mutually, a first interface and a second interface are arranged on the air cylinder body, the first interface is communicated with the first cavity, and the second interface is communicated with the second cavity. According to the air cylinder provided by the invention, when the rotating shaft is rotated, the rotating shaft drives the rotating plate to rotate in the accommodating cavity, so that the sizes of the first cavity and the second cavity can be adjusted, the volume adjustment is realized, different standard air cylinders do not need to be replaced aiming at volumes to be measured with different volumes, and the universality of a volume measurement system is further improved.
2. The invention also provides a volume measuring system which comprises an air source, a first gate valve, a measuring module, a second gate valve, a control module and a data processing module. The air source is communicated with the air cylinder through the first gate valve, the measuring module comprises a pressure sensor, the pressure sensor measures the pressure in the air cylinder, the air cylinder is communicated with the volume to be measured through the second gate valve, the control module is electrically connected with the air source, the first gate valve, the pressure sensor and the second gate valve, and the data processing module is electrically connected with the pressure sensor and the control module. The volume measuring system provided by the invention has the advantages that the volume of the used air cylinder can be adjusted, different standard air cylinders do not need to be replaced aiming at volumes to be measured with different volumes, and the universality of the volume measuring system is further improved.
3. The invention also provides a volume measurement method, which is used for estimating the volume to be measured and further adjusting the volume of the air cylinder according to the estimated volume to be measured, so that the volume of the air cylinder is close to the volume to be measured, and further the volume measurement precision is improved.
Drawings
Fig. 1 is a schematic partial sectional structural view of an air cylinder provided in this embodiment;
FIG. 2 is a schematic structural view of the locking assembly of FIG. 1;
FIG. 3 is a schematic structural diagram of the adjustment assembly of FIG. 1;
FIG. 4 is a schematic diagram of a volume measuring system provided in the present embodiment;
fig. 5 is a schematic diagram of a volume measurement method provided in this embodiment.
The reference numerals are explained in detail:
1. an air reservoir body; 11. a first cavity; 111. a first interface; 12. a second cavity; 121. a second interface; 13. a limiting member; 14. calibration; 15. an opening;
2. a locking assembly; 21. locking the bolt; 211. a through hole; 22. locking the nut; 221. a threaded through hole;
3. an adjustment assembly; 31. a rotating shaft; 311. a sealing part; 32. a fixing plate; 33. a rotating plate; 34. a rotating wheel; 35. a seal member;
4. a measurement module; 41. a pressure sensor; 42. a temperature sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be fully described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only some specific embodiments, not all embodiments, of the general technical solution of the present invention. All other embodiments, which can be derived by a person skilled in the art from the general idea of the invention, fall within the scope of protection of the invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
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 one or more of that feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Aiming at the technical problem that the existing volume test system is poor in universality, the invention provides the air cylinder which can realize volume adjustment and does not need to replace different standard air cylinders aiming at volumes to be tested with different volumes, so that the universality of the volume measurement system is improved. The invention also provides a volume measurement system and a volume measurement method. The technical solution of the present invention will be specifically described with reference to specific examples.
The present embodiment provides an air reservoir, including:
the air cylinder comprises an air cylinder body 1, wherein an accommodating cavity is formed in the air cylinder body 1, an opening 15 is formed in the accommodating cavity, and the opening 15 penetrates through the accommodating cavity;
and an adjusting assembly 3, the adjusting assembly 3 comprising:
one end of the rotating shaft 31 extends into the accommodating cavity through the opening 15, the rotating shaft 31 is positioned on a central shaft of the accommodating cavity, the rotating shaft 31 is relatively sealed and rotatably connected with the opening 15, and one end of the rotating shaft 31 extending into the accommodating cavity is relatively sealed and rotatably connected with the air cylinder body 1;
the fixing plate 32 is positioned in the accommodating cavity, the fixing plate 32 is arranged along the radial direction of the accommodating cavity, one side of the fixing plate 32 is abutted against the rotating shaft 31, and the fixing plate 32 is hermetically and fixedly connected with the air cylinder body 1;
the rotating plate 33 is positioned in the accommodating cavity, the rotating plate 33 is arranged along the radial direction of the accommodating cavity, one side of the rotating plate 33 is connected with the rotating shaft 31, and the rotating plate 33 and the air cylinder body 1 are relatively sealed and movably connected;
the fixed plate 32 and the rotating plate 33 divide the accommodating cavity into a first cavity 11 and a second cavity 12 which are sealed with each other, the air cylinder body 1 is provided with a first interface 111 and a second interface 121, the first interface 111 is communicated with the first cavity 11, and the second interface 121 is communicated with the second cavity 12.
The air cylinder provided by the embodiment comprises an air cylinder body 1 and an adjusting assembly 3. The inside chamber that holds that is formed with of reservoir body 1 holds the chamber, holds the chamber and is provided with opening 15, and opening 15 runs through to holding the chamber. The adjusting assembly 3 comprises a rotating shaft 31, a fixing plate 32 and a rotating plate 33, one end of the rotating shaft 31 extends into the accommodating cavity through the opening 15, the rotating shaft 31 is positioned on a central shaft of the accommodating cavity, the rotating shaft 31 and the opening 15 are relatively sealed and rotatably connected, and one end of the rotating shaft 31 extending into the accommodating cavity is relatively sealed and rotatably connected with the air cylinder body 1; the fixing plate 32 is positioned in the accommodating cavity, the fixing plate 32 is arranged along the radial direction of the accommodating cavity, one side of the fixing plate 32 is abutted against the rotating shaft 31, and the fixing plate 32 is hermetically and fixedly connected with the air cylinder body 1; the rotating plate 33 is located in the containing cavity, the rotating plate 33 is arranged along the radial direction of the containing cavity, one side of the rotating plate 33 is connected with the rotating shaft 31, and the rotating plate 33 and the air cylinder body 1 are in relatively sealed and movable connection. The fixed plate 32 and the rotating plate 33 divide the accommodating cavity into a first cavity 11 and a second cavity 12 which are sealed with each other, the air cylinder body 1 is provided with a first interface 111 and a second interface 121, the first interface 111 is communicated with the first cavity 11, and the second interface 121 is communicated with the second cavity 12. The reservoir that this embodiment provided, during rotatory axis of rotation 31, axis of rotation 31 drives rotor plate 33 and rotates in holding the chamber, can adjust the size of first cavity 11 and second cavity 12 to realize the volume and adjust, need not to change different standard reservoirs to the volume that awaits measuring of different volumes, further improve volume measurement system's commonality.
Specifically, the air cylinder provided by the embodiment comprises an air cylinder body 1, a locking assembly 2 and an adjusting assembly 3. The adjusting component 3 is positioned inside the air cylinder body 1, and the locking component 2 is connected with the adjusting component 3 and the air cylinder body 1.
More specifically, referring to fig. 1 and 2, the air cylinder body 1 is internally formed with a containing cavity, the containing cavity is of a cylindrical structure, the containing cavity has a central shaft, the containing cavity is provided with an opening 15, and the opening 15 penetrates through the containing cavity. The adjusting assembly 3 passes through the opening 15, and the locking assembly 2 is connected at the opening 15. The air cylinder body 1 is provided with a scale 14 for indicating the volume of the air cylinder. The air cylinder body 1 further comprises a limiting piece 13, the limiting piece 13 is located in the accommodating cavity, and the limiting piece 13 is used for limiting the adjusting assembly 3 and limiting the volume adjusting range of the adjusting assembly 3.
The locking assembly 2 is used for locking the adjusting assembly 3, so that the adjusted volume is not changed, and the stability of the adjusted volume is improved. Specifically, referring to fig. 2, the locking assembly 2 includes a locking bolt 21 and a locking nut 22. The locking bolt 21 is connected with the air cylinder body 1, the locking bolt 21 is provided with a through hole 211, the through hole 211 is communicated with the opening 15, and the adjusting assembly 3 penetrates through the through hole 211 and the opening 15. The locking bolt 21 is further provided with a notch groove (not shown in the drawings), the notch groove is arranged along the axial direction of the locking bolt 21, and the outer side of the locking bolt 21 is provided with an external thread. The locking nut 22 is provided with a threaded through hole 221, the locking nut 22 is sleeved on the adjusting assembly 3, the threaded through hole 221 is connected with the external thread, and the locking nut 22 is connected with the locking bolt 21 through the threaded through hole 221 and the external thread. When the locking nut 22 and the locking bolt 21 are screwed, the locking bolt 21 is provided with the notch groove, and the locking nut 22 compresses the locking bolt 21 while rotating, so that the locking bolt 21 compresses the adjusting component 3, the purpose of locking the adjusting component 3 is achieved, the rotation of the adjusting component 3 is further limited, and the adjusted volume is fixed. Preferably, the locking bolt 21 has a tapered structure to further enhance the locking effect.
The adjustment assembly 3 is used to achieve volume adjustment. Specifically, the adjusting assembly 3 includes a rotating shaft 31, a fixed plate 32, and a rotating plate 33. Rotation axis 31 one end is passed through opening 15 and is stretched into to holding the intracavity, and rotation axis 31 is located the center pin that holds the chamber, and rotation axis 31 and opening 15 are sealed relatively and rotate and are connected, and rotation axis 31 stretches into the one end that holds the chamber and is sealed relatively and rotate with reservoir body 1 and be connected. The rotating shaft 31 is rotatable within the accommodating chamber. The fixed plate 32 is located and holds the intracavity, and the fixed plate 32 is arranged along the radial that holds the chamber, and fixed plate 32 one side and axis of rotation 31 butt, and fixed plate 32 and reservoir body 1 are sealed mutually and fixed connection. The rotating shaft 31 is rotatable relative to the fixed plate 32. To further prevent air leakage, the rotating shaft 31 and the fixing plate 32 are sealed with each other. Preferably, the rotating shaft 31 is further provided with a seal portion 311, the rotating shaft 31 is vulcanized to form the seal portion 311, and the fixing plate 32 is in contact with the rotating shaft 31 through the seal portion 311. The rotating plate 33 is located and holds the intracavity, and the rotating plate 33 is arranged along holding the radial of chamber, and rotating plate 33 one side is connected with axis of rotation 31, and axis of rotation 31 can drive rotating plate 33 and rotate. The rotating plate 33 is connected with the air cylinder body 1 in a relatively sealed and movable manner. Specifically, the adjusting assembly 3 further includes a sealing member 35, the sealing member 35 is connected to the rotating plate 33, and the sealing member 35 is located between the rotating plate 33 and the air cylinder body 1, so that the rotating plate 33 and the air cylinder body 1 can be mutually sealed and movably connected.
The fixed plate 32 and the rotating plate 33 divide the accommodating cavity into a first cavity 11 and a second cavity 12 which are sealed with each other, the air cylinder body 1 is provided with a first interface 111 and a second interface 121, the first interface 111 is communicated with the first cavity 11, and the second interface 121 is communicated with the second cavity 12. Specifically, referring to fig. 1, a first cavity 11 is formed by one side of the fixed plate 32 and one side of the rotating plate 33 and the air cylinder body 1, a first interface 111 is arranged on the air cylinder body 1, and the first interface 111 is communicated to the first cavity 11; the other side of the fixed plate 32 and the other side of the rotating plate 33 form a second cavity 12 with the air cylinder body 1, a second interface 121 is arranged on the air cylinder body 1, the second interface 121 is communicated to the second cavity 12, and the second cavity 12 and the first cavity 11 are sealed with each other. When the rotating shaft 31 rotates, the rotating shaft 31 drives the rotating plate 33 to rotate in the accommodating cavity, so that the sizes of the first cavity 11 and the second cavity 12 can be changed, and the purpose of volume adjustment is realized.
The air cylinder body 1 provided in this embodiment further includes a limiting member 13, the limiting member 13 is located in the accommodating cavity, the limiting member 13 is located between the rotating plate 33 and the fixing plate 32, and the limiting member 13 is connected to the air cylinder body 1. The stopper 13 is used to limit the range of rotation of the rotating plate 33, and can limit the adjustment range of the volume.
To facilitate the volume adjustment of the reservoir provided in this embodiment, the adjustment assembly 3 further comprises a rotating wheel 34, and the rotating wheel 34 is connected to one end of the rotating shaft 31 extending out of the reservoir body 1. An operator can rotate the rotating shaft 31 through the rotating wheel 34, and the volume adjusting operation is facilitated. Further, still be provided with the indicator on the gyro wheel 34, be provided with scale 14 on the reservoir body 1, the indicator sets up with scale 14 is corresponding for instruct the volume size of first cavity 11 and/or second cavity 12, thereby the operating personnel's of being convenient for operation.
To facilitate understanding of the technical solution of the present embodiment, the volume adjustment process of the reservoir provided in the present embodiment will be further described.
An operator manually rotates the rotating wheel 34, the rotating wheel 34 drives the rotating shaft 31, and the rotating shaft 31 further drives the rotating plate 33 to rotate relative to the fixed plate 32 in the accommodating cavity, so that the sizes of the first cavity 11 and the second cavity 12 are changed. Then, the locking nut 22 is rotated, the locking nut 22 enables the locking bolt 21 to press the rotating shaft 31, and the rotating shaft 31 is locked, so that the stable adjustment of the volume of the air reservoir is realized.
The invention also provides a volume measurement system which comprises the air cylinder with the adjustable volume. Specifically, referring to fig. 4, the volume measuring system includes an air reservoir, an air source, a first gate valve R1, a measuring module 4, a second gate valve R2, a control module, and a data processing module. The air source communicates with the reservoir through the first gate valve R1, specifically, the first port 111, or the second port 121, and the first chamber 11 or the second chamber 12. The measuring module 4 comprises a pressure sensor 41. The pressure sensor 41 measures the pressure in the first chamber 11 or the second chamber 12. To further improve the accuracy of the measurement, the measurement module 4 further comprises a temperature sensor 42, the temperature sensor 42 measuring the temperature inside the first cavity 11 or the second cavity 12. The first cavity 11 or the second cavity 12 of the reservoir is communicated with the volume to be measured V2 through a second gate valve R2. A control module (not shown in the drawings) is electrically connected to the air supply, the first gate valve R1, the pressure sensor 41, the temperature sensor 42, and the second gate valve R2. The control module controls the air source to work, the control module controls the air source and the air reservoir to be switched on and off by controlling the on and off of the first gate valve R1, and the control module controls the air reservoir and the volume V2 to be measured to be switched on and off by controlling the on and off of the second gate valve R2. Further, the control module is electrically connected to a data processing module (not shown in the drawings), and the control module controls the data processing module to acquire and process data. The data processing module is electrically connected with the pressure sensor 41 and the temperature sensor 42 and is used for acquiring the measurement data of the pressure sensor 41 and the temperature sensor 42 and processing the measurement data, and the control module controls the data processing module to transmit the processing result to the upper computer or the display module.
The volume measurement system that this embodiment provided, the volume of reservoir can be adjusted, need not to change different standard reservoirs to the volume that awaits measuring of different volumes, further improves volume measurement system's commonality.
The embodiment also provides a volume measurement method, which uses the volume measurement system, and comprises the following steps:
step 1: predicting a volume V2 to be measured;
step 2: adjusting the volume V1 of the air reservoir according to the estimated volume V2 to be measured, so that the volume V1 of the air reservoir is similar to the volume V2 to be measured;
and step 3: measuring the pressure P2 in the reservoir;
and 4, step 4: closing the second gate valve R2, opening the first gate valve R1, controlling the air source to introduce a certain amount of compressed air into the air cylinder, and closing the first gate valve R1;
and 5: measuring the pressure P1 of the reservoir;
step 6: opening a second gate valve R2, and communicating the air cylinder with the volume V2 to be measured;
and 7: after stabilization, measuring the pressure P3 of the reservoir;
step 8: and substituting the pressures P1, P2, P3 and the air cylinder volume V1 into P1V1+ P2V 2-P3 (V1+ V2), and calculating to obtain the volume V2 to be measured.
Specifically, to improve the measurement accuracy of the volume measurement method provided in this embodiment, the volume to be measured V2 is estimated first. Then, the volume V1 of the air cylinder is adjusted according to the estimated volume V2 to be measured, that is, the volume of the first cavity 11 or the second cavity 12 of the air cylinder provided by the embodiment is adjusted, so that the volume V1 of the first cavity 11 or the second cavity 12 is close to the volume V2 to be measured. At this time, the pressure P2 of the first chamber 11 or the second chamber 12 is measured by the pressure sensor 41, and the pressure P2 is atmospheric pressure. The control module controls the second gate valve R2 to close and controls the first gate valve R1 to open, so that the wind source is communicated with the first cavity 11 or the second cavity 12. After a certain amount of compressed air is introduced, the control module controls the first gate valve R1 to close, so that the wind source is disconnected from the first cavity 11 or the second cavity 12. After stabilization, the control module controls the pressure sensor 41 to measure the pressure P1 of the first chamber 11 or the second chamber 12. Then, the control module controls the second gate valve R2 to open, so that the first cavity 11 or the second cavity 12 communicates with the volume to be measured V2, and the compressed air in the first cavity 11 or the second cavity 12 enters the volume to be measured V2. After stabilization, the control module controls the pressure sensor 41 to measure the pressure P3 of the first chamber 11 or the second chamber 12. The control module controls the data processing module to acquire measurement data of the pressure sensor 41 and perform data processing, specifically, the pressures P1, P2, P3 and the air cylinder volume V1 are substituted into P1V1+ P2V2 (P3 (V1+ V2)), and the volume to be measured V2 is obtained through calculation. The control module controls the data processing module to transmit the data processing result to the upper computer or the display module, so that the measurement of the volume V2 to be measured is completed.
Further, in order to improve the measurement accuracy of the volume measurement method provided by this embodiment, in the volume measurement method provided by this embodiment, step 3 further includes measuring the temperature of the reservoir. Specifically, step 3 is to measure the pressure P2 and the temperature T2 in the reservoir, i.e. to measure the pressure P2 and the temperature T2 of the first cavity 11 or the second cavity 12, and the pressure P2 and the temperature T2 are atmospheric pressure and ambient temperature. Correspondingly, step 5 also includes: after stabilization, the temperature T1 in the reservoir is measured, i.e. the pressure P1 and the temperature T1 of the first chamber 11 or the second chamber 12 are measured. Correspondingly, step 7 also includes: after stabilization, the temperature T3 in the reservoir is measured, i.e. the pressure P3 and the temperature T3 of the first chamber 11 or the second chamber 12 are measured. Accordingly, step 8 is: the pressures P1, P2, P3, the temperatures T1, T2, T3 and the air cylinder volume V1 are substituted into P1V1/T1+ P2V2/T2 which is P3(V1+ V2)/T3, and the volume V2 to be measured is obtained through calculation. The volume measurement method provided by the embodiment further considers the temperature change in the measurement process, and improves the volume measurement precision.
Specifically, referring to fig. 5, there is provided a flow chart of the volume measuring method according to the present embodiment.
The method comprises the following steps:
step 1: predicting a volume V2 to be measured;
step 2: adjusting the volume V1 of the air reservoir according to the estimated volume V2 to be measured, so that the volume V1 of the air reservoir is similar to the volume V2 to be measured;
and step 3: measuring the pressure P2 and the temperature T2 in the air reservoir;
and 4, step 4: closing the second gate valve R2, opening the first gate valve R1, controlling the air source to introduce a certain amount of compressed air into the air cylinder, and closing the first gate valve R1;
and 5: measuring the pressure P1 and the temperature T1 of the air reservoir;
step 6: opening a second gate valve R2, and communicating the air cylinder with the volume V2 to be measured;
and 7: after stabilization, measuring the pressure P3 and the temperature T3 of the air reservoir;
step 8: the pressures P1, P2, P3, the temperatures T1, T2, T3 and the air cylinder volume V1 are substituted into P1V1/T1+ P2V2/T2 which is P3(V1+ V2)/T3, and the volume V2 to be measured is obtained through calculation.
More specifically, the volume to be measured V2 is first estimated. Then, the volume V1 of the air cylinder is adjusted according to the estimated volume V2 to be measured, that is, the volume of the first cavity 11 or the second cavity 12 of the air cylinder provided by the embodiment is adjusted, so that the volume V1 of the first cavity 11 or the second cavity 12 is close to the volume V2 to be measured. At this time, the pressure P2 of the first chamber 11 or the second chamber 12 is measured by the pressure sensor 41, and the temperature T2 of the first chamber 11 or the second chamber 12 is measured by the temperature sensor 42. The control module controls the second gate valve R2 to be closed and the first gate valve R1 to be opened, so that the wind source is communicated with the first cavity 11 or the second cavity 12. After a certain amount of compressed air is introduced, the control module controls the first gate valve R1 to close, so that the wind source is disconnected from the first cavity 11 or the second cavity 12. After stabilization, the control module controls the pressure sensor 41 to measure the pressure P1 of the first chamber 11 or the second chamber 12, and the control module controls the temperature sensor 42 to measure the temperature T1 of the first chamber 11 or the second chamber 12. Then, the control module controls the second gate valve R2 to open, so that the first cavity 11 or the second cavity 12 communicates with the volume to be measured V2, and the compressed air in the first cavity 11 or the second cavity 12 enters the volume to be measured V2. After stabilization, the control module controls the pressure sensor 41 to measure the pressure P3 of the first chamber 11 or the second chamber 12, and the control module controls the temperature sensor 42 to measure the temperature T3 of the first chamber 11 or the second chamber 12. The control module controls the data processing module to acquire measurement data of the pressure sensor 41 and the temperature sensor 42 and perform data processing, specifically, the pressures P1, P2, P3, the temperatures T1, T2, T3 and the air cylinder volume V1 are substituted into P1V1/T1+ P2V2/T2 which is P3(V1+ V2)/T3, and the volume to be measured V2 is calculated. The control module controls the data processing module to transmit the data processing result to the upper computer or the display module, so that the measurement of the volume V2 to be measured is completed.
Claims (10)
1. An air reservoir, comprising:
the air cylinder comprises an air cylinder body, wherein an accommodating cavity is formed in the air cylinder body, an opening is formed in the accommodating cavity, and the opening penetrates through the accommodating cavity;
and an adjustment assembly, the adjustment assembly comprising:
one end of the rotating shaft extends into the accommodating cavity through the opening, the rotating shaft is positioned on a central shaft of the accommodating cavity, the rotating shaft and the opening are relatively sealed and rotatably connected, and one end of the rotating shaft extending into the accommodating cavity is relatively sealed and rotatably connected with the air cylinder body;
the fixed plate is positioned in the accommodating cavity, the fixed plate is arranged along the radial direction of the accommodating cavity, one side of the fixed plate is abutted against the rotating shaft, and the fixed plate is hermetically and fixedly connected with the air cylinder body;
the rotating plate is positioned in the accommodating cavity, the rotating plate is arranged along the radial direction of the accommodating cavity, one side of the rotating plate is connected with the rotating shaft, and the rotating plate and the air cylinder body are relatively sealed and movably connected;
the fixed plate and the rotating plate divide the accommodating cavity into a first cavity and a second cavity which are sealed mutually, a first interface and a second interface are arranged on the air cylinder body, the first interface is communicated with the first cavity, and the second interface is communicated with the second cavity.
2. The reservoir of claim 1, further comprising a locking assembly, the locking assembly comprising:
the locking bolt is connected with the air cylinder body and provided with a through hole, the through hole is communicated with the opening, the rotating shaft penetrates through the through hole, a notch groove is formed in the locking bolt, and external threads are arranged on the outer side of the locking bolt;
the locking nut is provided with a threaded through hole and sleeved on the rotating shaft, and the locking nut is connected with the locking bolt through the threaded through hole and the external thread.
3. The air cylinder according to claim 1, further comprising a limiting member, wherein the limiting member is located in the accommodating cavity, the limiting member is located between the rotating plate and the fixing plate, and the limiting member is connected to the air cylinder body.
4. The reservoir of claim 1, further comprising a rotatable wheel connected to an end of the rotatable shaft extending out of the reservoir body.
5. The air cylinder as claimed in claim 4, wherein the rotating wheel is provided with an indication mark, the air cylinder body is provided with a scale, and the indication mark is arranged corresponding to the scale.
6. The reservoir of claim 1, wherein the rotating shaft further comprises a seal, the rotating shaft being vulcanized to form the seal, the fixing plate abutting the rotating shaft through the seal.
7. A volume measurement system comprising the reservoir according to any one of claims 1 to 6, further comprising:
the wind source is arranged on the air duct,
the air source is communicated with the air cylinder through the first gate valve;
a measurement module, the measurement module comprising:
a pressure sensor that measures pressure within the reservoir;
the air cylinder is communicated with the volume to be measured through the second gate valve;
the control module is electrically connected with the air source, the first gate valve, the pressure sensor and the second gate valve;
and the data processing module is electrically connected with the pressure sensor and the control module.
8. The volumetric measurement system of claim 7, wherein the measurement module further comprises:
and the temperature sensor is used for measuring the temperature in the air cylinder and is connected with the control module and the data processing module.
9. A volume measurement method, characterized by using the volume measurement system of claim 7 or 8, comprising the steps of:
step 1: predicting a volume V2 to be measured;
step 2: adjusting the volume V1 of the air reservoir according to the estimated volume V2 to be measured, so that the volume V1 of the air reservoir is similar to the volume V2 to be measured;
and step 3: measuring the pressure P2 in the reservoir;
and 4, step 4: closing the second gate valve R2, opening the first gate valve R1, controlling the air source to introduce a certain amount of compressed air into the air cylinder, and closing the first gate valve R1;
and 5: measuring the pressure P1 of the reservoir;
step 6: opening a second gate valve R2, and communicating the air cylinder with the volume V2 to be measured;
and 7: after stabilization, measuring the pressure P3 of the reservoir;
and 8: and substituting the pressures P1, P2, P3 and the air cylinder volume V1 into P1V1+ P2V 2-P3 (V1+ V2), and calculating to obtain the volume V2 to be measured.
10. The volume measuring method according to claim 9, wherein the step 3 further comprises: measuring the temperature T2 of the air reservoir;
the step 5 further comprises: measuring the temperature T1 in the air reservoir;
the step 7 further comprises: after stabilization, measuring the temperature T3 of the air cylinder;
the step 8 is as follows: the pressures P1, P2, P3, the temperatures T1, T2, T3 and the air cylinder volume V1 are substituted into P1V1/T1+ P2V2/T2 which is P3(V1+ V2)/T3, and the volume V2 to be measured is obtained through calculation.
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| CN202010777273.2A CN111896067B (en) | 2020-08-05 | 2020-08-05 | Air cylinder, volume measurement system and volume measurement method |
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| CN202010777273.2A CN111896067B (en) | 2020-08-05 | 2020-08-05 | Air cylinder, volume measurement system and volume measurement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2679696B1 (en) * | 1991-07-24 | 1993-09-24 | Alsthom Gec | HIGH AND MEDIUM VOLTAGE CIRCUIT BREAKER WITH SUPPLY GAS. |
| JP2003344203A (en) * | 2002-05-22 | 2003-12-03 | Nippon Soda Co Ltd | Measuring instrument for measuring sealed gas volume |
| DE102008014249A1 (en) * | 2008-03-13 | 2009-09-24 | Man Diesel Se | Process for the combustion gas exchange (purging) in a two-stroke internal combustion engine |
| CN201188043Y (en) * | 2008-03-14 | 2009-01-28 | 潘玮 | Calandria type cubage air cylinder |
| CN102353416B (en) * | 2011-06-08 | 2012-11-21 | 合肥工业大学 | Synchronization pressure measurement-based cylinder cover volume detection device and method |
| US20150241209A1 (en) * | 2014-02-25 | 2015-08-27 | Astronics Advanced Electronic Systems Corp. | Apparatus and method to monitor the occupied volume within a fixed or variable volume |
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Address after: No. 231, Ruichang Road, North District, Qingdao, Shandong Applicant after: CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE Co.,Ltd. Applicant after: CRRC Brake System Co., Ltd Address before: No. 231, Ruichang Road, North District, Qingdao, Shandong Applicant before: CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE Co.,Ltd. Applicant before: Qingdao Sirui Technology Co., Ltd |
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