CN114545856A - Mechanical self-resetting air pressure detection control device and control method - Google Patents
Mechanical self-resetting air pressure detection control device and control method Download PDFInfo
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- CN114545856A CN114545856A CN202210146304.3A CN202210146304A CN114545856A CN 114545856 A CN114545856 A CN 114545856A CN 202210146304 A CN202210146304 A CN 202210146304A CN 114545856 A CN114545856 A CN 114545856A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14036—Detection of fault in processor
Abstract
The invention discloses a mechanical self-resetting air pressure detection control device and a control method, which relate to the technical field of air pressure transmission and have the technical scheme that: the system also comprises a processor and a PLC controller; the side wall of the air pressure main pipe is communicated with an adjusting cylinder, the inside of the adjusting cylinder is movably connected with an adjusting plug in a sealing mode, and the adjusting cylinder is provided with a driving piece for driving the adjusting plug to move along the axis direction of the adjusting cylinder; an air pressure sensor is arranged in the air pressure main pipe and/or the adjusting cylinder; the output end of the air pressure sensor is connected with the input end of the processor, the output end of the processor is connected with the input end of the PLC, and the output end of the PLC is connected with the input end of the driving piece; the processor is electrically connected with the air source device. The invention keeps the air pressure inside the air pressure main pipe in a relatively stable state in a compressed air or diffused air mode, does not need to frequently adjust an air source device, effectively ensures the stability of the whole system and simultaneously reduces the frequency of air pressure detection.
Description
Technical Field
The invention relates to the technical field of pneumatic transmission, in particular to a mechanical self-resetting pneumatic detection control device and a control method.
Background
The pneumatic transmission is fluid transmission which takes compressed gas as a working medium and transfers power or information by the pressure of the gas. The system for transmitting power is to transmit compressed gas to the pneumatic actuator through a pipeline and a control valve, and convert the pressure energy of the compressed gas into mechanical energy to do work; the system for transmitting information utilizes a pneumatic logic element or a jet element to realize functions such as logic operation and the like, and is also called a pneumatic control system.
With the high-precision manufacturing and the high-speed development of the power electronic industry, higher precision requirements are put forward on a control system suitable for pneumatic transmission. And the air pressure transmission has partial air pressure loss in the use process, because absolute sealing cannot exist during the air pressure transmission, especially along with long-time use, the sealing performance of a sealing structure is reduced to a certain extent, so that the precision of the air pressure transmission is gradually reduced, the air pressure of an air pressure transmission control system needs to be detected frequently, and the problems of high detection frequency, time and labor waste and the like exist. Therefore, in the prior art, the air pressure inside the air pressure main pipe is detected in real time, and the working state of the air source device is subjected to feedback control according to the detection result, so that the air pressure loss in the air pressure transmission process is compensated.
However, the air pressure loss in the air pressure transmission process is generated continuously in real time, and the working state of the air source device is subjected to feedback control according to the detection result, so that the adjustment frequency of the air source device is too high, the service life of the air source device is seriously reduced, and the stability of the whole system is influenced. Therefore, how to design a mechanical self-resetting air pressure detection control device and a control method capable of overcoming the above defects is a problem which needs to be solved urgently at present.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a mechanical self-resetting air pressure detection control device and a control method, which can adaptively adjust the volume inside an air pressure main pipe by a mechanical piston structure according to a detection result, keep the air pressure inside the air pressure main pipe in a relatively stable state in a compressed air or diffused air mode, avoid frequent adjustment of an air source device in the whole operation process, effectively ensure the stability of the whole system and reduce the frequency of air pressure detection.
The technical purpose of the invention is realized by the following technical scheme:
in a first aspect, a mechanical self-resetting air pressure detection control device is provided, which comprises an air pressure main pipe and an air source device, and further comprises a processor and a PLC (programmable logic controller);
the side wall of the air pressure main pipe is communicated with an adjusting cylinder, the inside of the adjusting cylinder is movably connected with an adjusting plug in a sealing mode, and the adjusting cylinder is provided with a driving piece for driving the adjusting plug to move along the axis direction of the adjusting cylinder;
an air pressure sensor is arranged in the air pressure main pipe and/or the adjusting cylinder;
the output end of the air pressure sensor is connected with the input end of the processor, the output end of the processor is connected with the input end of the PLC, and the output end of the PLC is connected with the input end of the driving piece;
the processor is electrically connected with the air source device.
Furthermore, the driving piece is a driving cylinder, and an output shaft of the driving cylinder is fixedly connected with the end part of the adjusting plug.
Further, the driving piece is a driving motor;
the output shaft of the driving motor is connected with a connector, at least one limiting bulge is arranged on the periphery of the connector, and the limiting bulge is arranged along the axis direction of the output shaft of the driving motor;
the end part of the adjusting plug is provided with a sliding cavity for placing the connector, the sliding cavity is arranged along the axial direction of the adjusting plug, the axial length of the sliding cavity is greater than that of the connector, and the inner wall of the sliding cavity is provided with a limiting groove for the limiting protrusion to slide;
the outer wall of the adjusting plug is provided with a spiral protrusion, and the inner wall of the adjusting cylinder is provided with a spiral groove matched with the spiral protrusion in a spiral mode.
Furthermore, a stop valve positioned between the adjusting plug and the air pressure main pipe is arranged in the adjusting cylinder, and the stop valve is connected with the PLC;
the PLC is provided with an on-off switch, and the PLC responds to an on-off signal triggered by the on-off switch to control the on-off of the stop valve.
In a second aspect, there is provided a mechanical self-resetting air pressure detection control method for a mechanical self-resetting air pressure detection control device according to any one of the first aspect, comprising the steps of:
collecting air pressure data of an air pressure main pipe in a standard time period through an air pressure sensor, and establishing an air pressure real-time curve;
obtaining an air pressure change curve according to the difference between the air pressure real-time curve and a standard pressure value determined by the working state of the air source device;
dividing the standard time period into time units which are continuously distributed, and analyzing according to an air pressure change curve to obtain the air pressure change quantity of each time unit;
the air pressure variation is converted into the expansion amount of the adjusting plug, and the adjusting plug is controlled to move along the axis direction of the adjusting cylinder according to the expansion amount, so that the real-time air pressure in the air pressure main pipe is regulated to the standard pressure value.
Further, the calculation formula for converting the air pressure variation into the expansion amount of the adjusting plug is specifically as follows:
wherein, l represents the expansion amount of the regulating plug along the axial direction, if the expansion amount is a negative value, the regulating plug moves towards the main gas pressure pipe to compress gas, and if the expansion amount is a positive value, the regulating plug moves away from the main gas pressure pipe to diffuse gas; delta P represents the air pressure variation of a time unit and is calculated by the difference between the air pressure value at the end moment of the time unit and the air pressure value at the beginning moment; v0The volume of the air pressure main pipe and the accommodating volume of the air pressure adjusting cylinder before the adjustment and control of the corresponding time unit are represented; p1Represents a standard pressure value; s represents the inner cross-sectional area of the adjustment cylinder in cm2。
Further, the control method further comprises the step of comparing the air pressure variation of the current time unit with a reference quantity of a preset value through a processor:
if the air pressure variation is greater than or equal to the reference quantity, directly converting the air pressure variation into the stretching quantity;
and if the air pressure variation is smaller than the reference amount, adding the air pressure variation of the current time unit and the air pressure variation of the next time unit to be used as the air pressure variation of the next time unit participating in regulation until the superposed air pressure variation is larger than or equal to the reference amount, and converting the superposed air pressure variation into the expansion amount.
Further, the control method further includes:
the total expansion amount of the adjusting plug is counted by the processor, and when the total expansion amount exceeds the adjusting limit of the adjusting plug and the adjusting cylinder, the processor simultaneously transmits feedback signals to the air source device and the PLC;
the PLC controller controls the adjusting plug to reset after responding to the feedback signal;
and after responding to the feedback signal, the air source device adjusts the real-time air pressure in the air pressure main pipe until the air pressure reaches a standard pressure value after the resetting of the adjusting plug is completed.
Further, the control method further comprises;
counting the regulation frequency of the regulation plug in a first preset period through a processor;
and if the regulation frequency is greater than or equal to the upper limit frequency, the processor outputs a detection maintenance signal.
Further, the control method further comprises;
counting the regulation frequency of the regulation plug in a second preset period through a processor;
and if the regulation frequency is less than the lower limit frequency, the processor outputs a regulation fault signal.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the mechanical self-resetting air pressure detection control device, the volume inside the air pressure main pipe can be adjusted in a mechanical piston structure adaptability mode according to the detection result, the air pressure inside the air pressure main pipe is kept in a relatively stable state in a compressed air or diffused air mode, the air source device does not need to be adjusted frequently in the whole operation process, the stability of the whole system is effectively guaranteed, and meanwhile the air pressure detection frequency is reduced;
2. the invention restricts the relative circumferential rotation between the connector and the adjusting plug through the matching of the limiting protrusion and the limiting groove, and the adjusting plug can stretch out and draw back along the axial direction of the adjusting cylinder under the matching of the spiral protrusion and the spiral groove; in addition, the spiral bulge is matched with the spiral groove, so that the condition that the adjusting plug automatically moves in the main air pressure pipe under the condition of being higher than atmospheric pressure can be effectively prevented, and the sealing performance between the adjusting plug and the adjusting cylinder can be effectively enhanced;
3. according to the invention, the air pressure variation of the current time unit is compared and analyzed with the reference quantity of the preset value through the processor, so that the regulation and control frequency of the regulating plug can be effectively reduced;
4. the invention can also carry out feedback control on the working state of the air source device according to the regulation and control condition of the regulating plug, and simultaneously carry out reset control on the regulating plug, thereby effectively ensuring that the air pressure detection regulating and control device can be recycled;
5. the invention also analyzes the regulation and control frequency of the regulating plug, can realize automatic detection, maintenance and early warning under the condition of larger regulation and control frequency, and simultaneously realizes automatic detection and early warning of failure faults of the regulating device under the condition of lower or zero regulation and control frequency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure in an embodiment of the present invention;
fig. 2 is a schematic diagram of the operation in the embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
101. a main air pressure pipe; 102. a stop valve; 103. an adjusting cylinder; 104. a drive member; 105. an adjusting plug; 106. a spiral groove; 107. a spiral protrusion; 108. a connector; 109. a limiting bulge; 110. a limiting groove; 201. an air pressure sensor; 202. a processor; 203. a PLC controller; 204. and an air source device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example (b): a mechanical self-reset air pressure detection control device, as shown in fig. 1 and fig. 2, comprises an air pressure main pipe 101, an air source device 204, a processor 202 and a PLC controller 203. The side wall of the main air pressure pipe 101 is communicated with an adjusting cylinder 103, an adjusting plug 105 is movably connected in the adjusting cylinder 103 in a sealing mode, and the adjusting cylinder 103 is provided with a driving piece 104 for driving the adjusting plug 105 to move along the axial direction of the adjusting cylinder 103. An air pressure sensor 201 is arranged inside the adjusting cylinder 103. The output end of the air pressure sensor 201 is connected with the input end of the processor 202, the output end of the processor 202 is connected with the input end of the PLC controller 203, and the output end of the PLC controller 203 is connected with the input end of the driving piece 104. The processor 202 is electrically connected to the gas source device 204.
The invention can adaptively adjust the volume inside the main gas pressure pipe 101 by a mechanical piston structure according to the detection result, and keep the gas pressure inside the main gas pressure pipe 101 in a relatively stable state in a compressed gas or diffused gas mode, so that the gas source device 204 does not need to be frequently adjusted in the whole operation process, the stability of the whole system is effectively ensured, and the frequency of gas pressure detection is reduced.
The air pressure sensor 201 may be installed in the main air pressure pipe 101 or the adjustment cylinder 103, or may be installed in the main air pressure pipe 101 or the adjustment cylinder 103, and an average value of the two air pressure sensors 201 may be used as a detection value to reduce an error due to the flow of the air flow.
In this embodiment, the driving member 104 is a driving motor, and the driving motor rotates forward and backward to realize the adjustment and control in different directions; an output shaft of the driving motor is connected with a connector 108, a plurality of limiting protrusions 109 are arranged on the periphery of the connector 108, and the limiting protrusions 109 are distributed along the axis direction of the output shaft of the driving motor; the end part of the adjusting plug 105 is provided with a sliding cavity for placing the connecting head 108, the sliding cavity is arranged along the axial direction of the adjusting plug 105, the axial length of the sliding cavity is greater than that of the connecting head 108, and the inner wall of the sliding cavity is provided with a limiting groove 110 for the limiting protrusion 109 to slide; the outer wall of the adjusting plug 105 is provided with a spiral protrusion 107, and the inner wall of the adjusting cylinder 103 is provided with a spiral groove 106 which is spirally matched with the spiral protrusion 107. According to the invention, the limiting protrusion 109 is matched with the limiting groove 110, so that the relative circumferential rotation between the connector 108 and the adjusting plug 105 is limited, and the adjusting plug 105 can stretch out and draw back along the axial direction of the adjusting cylinder 103 under the matching of the spiral protrusion 107 and the spiral groove 106; in addition, the spiral protrusion 107 and the spiral groove 106 cooperate with each other, so that the adjusting plug 105 can be effectively prevented from moving by itself under the condition of high air pressure in the air pressure main pipe 101, and the sealing performance between the adjusting plug 105 and the adjusting cylinder 103 can be effectively enhanced.
As another alternative, the driving element 104 is a driving cylinder, and an output shaft of the driving cylinder is fixedly connected with an end of the adjusting plug 105. It should be noted that the driving manner between the driving member 104 and the adjusting plug 105 may be replaced by other driving manners capable of realizing axis driving, and the invention is not limited thereto.
In the embodiment, a stop valve 102 positioned between the adjusting plug 105 and the air pressure main pipe 101 is arranged inside the adjusting cylinder 103, and the stop valve 102 is connected with the PLC 203; the PLC 203 is provided with an on-off switch, and the PLC 203 responds to an on-off signal triggered by the on-off switch to control the on-off of the stop valve 102. When the devices in the adjusting cylinder 103 need to be overhauled, the sealing and the separation of the adjusting cylinder 103 can be completed by operating the on-off switch.
As shown in fig. 2, the control method of the mechanical self-resetting air pressure detection control device includes the following steps:
s1: collecting air pressure data of the main air pressure pipe 101 in a standard time period through an air pressure sensor 201, and establishing an air pressure real-time curve;
s2: obtaining an air pressure change curve according to the difference between the air pressure real-time curve and a standard pressure value determined by the working state of the air source device 204;
s3: dividing the standard time period into time units which are continuously distributed, and analyzing according to an air pressure change curve to obtain the air pressure change quantity of each time unit;
s4: the air pressure variation is converted into the expansion amount of the adjusting plug 105, and the adjusting plug 105 is controlled to move along the axial direction of the adjusting cylinder 103 according to the expansion amount, so that the real-time air pressure in the air pressure main pipe 101 is regulated to the standard pressure value.
It should be noted that the processor 202 may also be replaced by other upper computers, intelligent terminals, servers, etc. with operation processing capability, so as to implement remote transmission of data by using the communication module.
In this embodiment, the calculation formula for converting the air pressure variation into the expansion amount of the adjusting plug 105 is specifically as follows:
wherein, l represents the expansion and contraction amount of the regulating plug 105 in the axial direction, if the expansion and contraction amount is negative, the regulating plug moves towards the main gas pressure pipe 101 to compress gas, and if the expansion and contraction amount is positive, the regulating plug moves away from the main gas pressure pipe 101 to diffuse gas; delta P represents the air pressure variation of a time unit and is calculated by the difference between the air pressure value at the end moment of the time unit and the air pressure value at the beginning moment; v0Indicating the accommodating volume of the main air pressure pipe 101 and the adjusting cylinder 103 before the adjustment and control of the corresponding time unit; p1Represents a standard pressure value; s represents the inner cross-sectional area of the adjustment cylinder 103 in cm2。
It should be noted that the above formula can be modified without considering the volume change of the adjusting cylinder 103 itself, and can be modified with further considering the influence of the spiral groove 106 on the volume, which can be adjusted according to the requirement.
In addition, the present invention compares the air pressure variation of the current time unit with a reference of the preset value by the processor 202: if the air pressure variation is greater than or equal to the reference quantity, directly converting the air pressure variation into the stretching quantity; if the air pressure variation is smaller than the reference amount, the air pressure variation of the current time unit and the air pressure variation of the next time unit are added to be used as the air pressure variation participating in regulation of the next time unit until the superposed air pressure variation is larger than or equal to the reference amount, and the superposed air pressure variation is converted into the expansion amount, so that the regulation and control frequency of the regulating plug 105 can be effectively reduced.
In addition, the invention also counts the total expansion amount of the adjusting plug 105 through the processor 202, and when the total expansion amount exceeds the adjusting limit of the adjusting plug 105 and the adjusting cylinder 103, the processor 202 simultaneously transmits a feedback signal to the air source device 204 and the PLC 203; the PLC controller 203 controls the adjusting plug 105 to reset after responding to the feedback signal; after the air source device 204 responds to the feedback signal, the real-time air pressure in the air pressure main pipe 101 is adjusted until the air pressure reaches the standard pressure value after the adjusting plug 105 is reset, the air pressure detection and regulation device can be effectively ensured to be recycled,
moreover, the invention also counts the regulation frequency of the regulation plug 105 in a first preset period through the processor 202; if the regulation frequency is greater than or equal to the upper limit frequency, the processor 202 outputs a detection maintenance signal, can realize automatic detection, maintenance and early warning under the condition of larger regulation frequency,
finally, the invention also counts the regulation frequency of the regulation plug 105 in a second preset period through the processor 202; if the regulation frequency is less than the lower limit frequency, the processor 202 outputs a regulation fault signal, and the automatic detection and early warning of the failure fault of the adjusting device can be realized under the condition that the regulation frequency is lower or zero.
It should be noted that the first preset period and the second preset period may be the same or different, and the size distribution between the first preset period and the second preset period is not limited herein.
The working principle is as follows: the invention can adaptively adjust the volume inside the main gas pressure pipe 101 by a mechanical piston structure according to the detection result, and keep the gas pressure inside the main gas pressure pipe 101 in a relatively stable state by a compressed gas or diffused gas mode, so that the gas source device 204 does not need to be frequently adjusted in the whole operation process, the stability of the whole system is effectively ensured, and the frequency of gas pressure detection is reduced.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A mechanical self-reset air pressure detection control device comprises an air pressure main pipe (101) and an air source device (204), and is characterized by also comprising a processor (202) and a PLC (programmable logic controller) (203);
the side wall of the air pressure main pipe (101) is communicated with an adjusting cylinder (103), an adjusting plug (105) is movably connected inside the adjusting cylinder (103) in a sealing mode, and the adjusting cylinder (103) is provided with a driving piece (104) for driving the adjusting plug (105) to move along the axial direction of the adjusting cylinder (103);
an air pressure sensor (201) is arranged in the air pressure main pipe (101) and/or the adjusting cylinder (103);
the output end of the air pressure sensor (201) is connected with the input end of the processor (202), the output end of the processor (202) is connected with the input end of the PLC controller (203), and the output end of the PLC controller (203) is connected with the input end of the driving piece (104);
the processor (202) is electrically connected with the air source device (204).
2. The mechanical self-resetting air pressure detection control device of claim 1, wherein the driving part (104) is a driving air cylinder, and an output shaft of the driving air cylinder is fixedly connected with the end part of the adjusting plug (105).
3. The mechanical self-resetting air pressure detection control device of claim 1, wherein the driving member (104) is a driving motor;
the output shaft of the driving motor is connected with a connector (108), at least one limiting bulge (109) is arranged on the periphery of the connector (108), and the limiting bulge (109) is arranged along the axis direction of the output shaft of the driving motor;
the end part of the adjusting plug (105) is provided with a sliding cavity for placing the connector (108), the sliding cavity is arranged along the axial direction of the adjusting plug (105), the axial length of the sliding cavity is greater than that of the connector (108), and the inner wall of the sliding cavity is provided with a limiting groove (110) for the limiting protrusion (109) to slide;
the outer wall of the adjusting plug (105) is provided with a spiral protrusion (107), and the inner wall of the adjusting cylinder (103) is provided with a spiral groove (106) which is spirally matched with the spiral protrusion (107).
4. The mechanical self-resetting air pressure detection control device of claim 1, wherein a stop valve (102) positioned between the adjusting plug (105) and the air pressure main pipe (101) is arranged inside the adjusting cylinder (103), and the stop valve (102) is connected with the PLC (203);
the PLC controller (203) is provided with an on-off switch, and the PLC controller (203) responds to an on-off signal triggered by the on-off switch to control the on-off of the stop valve (102).
5. A mechanical self-resetting air pressure detection control method, which is used for the mechanical self-resetting air pressure detection control device of any one of claims 1 to 4, and comprises the following steps:
collecting air pressure data of an air pressure main pipe (101) in a standard time period through an air pressure sensor (201) to establish an air pressure real-time curve;
obtaining an air pressure change curve according to the difference between the air pressure real-time curve and a standard pressure value determined by the working state of the air source device (204);
dividing the standard time period into time units which are continuously distributed, and analyzing according to an air pressure change curve to obtain the air pressure change quantity of each time unit;
the air pressure variation quantity is converted into the expansion quantity of the adjusting plug (105), and the adjusting plug (105) is controlled to move along the axial direction of the adjusting cylinder (103) according to the expansion quantity, so that the real-time air pressure in the air pressure main pipe (101) is adjusted and controlled to be the standard pressure value.
6. The mechanical self-resetting air pressure detection control method of claim 5, wherein the calculation formula for converting the air pressure variation into the expansion amount of the adjusting plug (105) is as follows:
wherein l represents the expansion and contraction amount of the adjusting plug (105) along the axial direction, if the expansion and contraction amount is negative, the adjusting plug moves towards the main gas pressure pipe (101) to compress gas, and if the expansion and contraction amount is positive, the adjusting plug moves away from the main gas pressure pipe (101) to diffuse gas; delta P represents the air pressure variation of a time unit and is calculated by the difference between the air pressure value at the end moment of the time unit and the air pressure value at the beginning moment; v0The volume of the air pressure main pipe (101) and the volume of the adjusting cylinder (103) before the adjustment and control of the corresponding time unit are represented; p1Represents a standard pressure value; s represents regulationInner cross-sectional area of the barrel (103) in cm2。
7. The mechanical self-resetting air pressure detection control method of claim 5, further comprising comparing, by the processor (202), an air pressure variation amount of a current time unit with a reference amount of a preset value:
if the air pressure variation is greater than or equal to the reference quantity, directly converting the air pressure variation into the stretching quantity;
and if the air pressure variation is smaller than the reference amount, adding the air pressure variation of the current time unit and the air pressure variation of the next time unit to be used as the air pressure variation of the next time unit participating in regulation until the superposed air pressure variation is larger than or equal to the reference amount, and converting the superposed air pressure variation into the expansion amount.
8. The mechanical self-resetting air pressure detection control method of claim 5, characterized by further comprising the following steps:
counting the total expansion amount of the adjusting plug (105) through the processor (202), and when the total expansion amount exceeds the adjusting limit of the adjusting plug (105) and the adjusting cylinder (103), the processor (202) simultaneously transmits a feedback signal to the air source device (204) and the PLC controller (203);
the PLC controller (203) controls the adjusting plug (105) to reset after responding to the feedback signal;
and after responding to the feedback signal, the air source device (204) adjusts the real-time air pressure in the air pressure main pipe (101) until the real-time air pressure reaches a standard pressure value after the resetting of the adjusting plug (105) is completed.
9. The mechanical self-resetting air pressure detection control method of claim 5, characterized by further comprising;
counting, by a processor (202), a regulation frequency of the regulating plug (105) within a first preset period;
if the regulation frequency is greater than or equal to the upper limit frequency, the processor (202) outputs a detection maintenance signal.
10. The mechanical self-resetting air pressure detection control method of claim 5, characterized by further comprising;
counting, by the processor (202), a regulation frequency of the regulation plug (105) in a second preset period;
if the regulation frequency is less than the lower limit frequency, the processor (202) outputs a regulation fault signal.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114545856B (en) | 2024-02-27 |
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