CN116625575A - Pressure scanning valve on-site calibration system and method thereof - Google Patents
Pressure scanning valve on-site calibration system and method thereof Download PDFInfo
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- CN116625575A CN116625575A CN202310569775.XA CN202310569775A CN116625575A CN 116625575 A CN116625575 A CN 116625575A CN 202310569775 A CN202310569775 A CN 202310569775A CN 116625575 A CN116625575 A CN 116625575A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 11
- 238000009530 blood pressure measurement Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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Abstract
The application belongs to the technical field of pressure scanning valve field calibration design, and particularly relates to a pressure scanning valve field calibration system and a pressure scanning valve field calibration method, wherein the system comprises the following components: a nitrogen cylinder; the pressure supply system is connected with a nitrogen cylinder through a pipeline; the push valve pressure multiplexer is connected with the pressure supply system through a pipeline and connected with the push valve ports of the pressure scanning valves through pipelines so as to provide rated control pressure for the push valve ports of the pressure scanning valves, and change the state of the valve body inside the pressure scanning valves to enable the pressure measuring channels inside the pressure scanning valves to be communicated; the digital pressure controller is connected with the pressure supply system through a pipeline; a standard pressure multiplexer connected with the digital pressure controller through a pipeline and connected with the calibration ports of the pressure scanning valves through pipelines so as to be capable of supplying standard pressure to the calibration ports of the pressure scanning valves; the network line multiplexer is connected with each pressure scanning valve and the digital pressure controller through network lines; the computer is connected with the network cable multiplexer through a network cable.
Description
Technical Field
The application belongs to the technical field of pressure scanning valve field calibration design, and particularly relates to a pressure scanning valve field calibration system and a pressure scanning valve field calibration method.
Background
In the fields of aviation, aerospace, wind tunnel calibration and the like, the pressure is a critical process parameter, and accurate measurement and strict monitoring are required.
Compared with the traditional pressure measuring instrument, the pressure scanning valve has the advantages of high accuracy level, good integration level, strong environmental adaptability and the like, 16 high-precision temperature compensation pressure sensors are integrated in each pressure scanning valve, the internal gas paths of all the pressure measuring channels are independent of each other, synchronous measurement of 16 channel pressure parameters can be realized, the accuracy level can reach 0.05% FS, the pressure scanning valve is suitable for multipoint measurement of the high-precision pressure parameters, and the pressure scanning valve is well suitable for aviation, aerospace and wind tunnel calibration.
In order to ensure the accuracy and reliability of the measurement result of the pressure scanning valve, the periodic calibration of the pressure scanning valve needs to be carried out, currently, a single-channel manual calibration method is mostly adopted to calibrate the pressure scanning valve on site, standard pressure is respectively supplied to each pressure measurement channel of the pressure scanning valve, the output pressure value of each pressure measurement channel is sequentially recorded, and the calibration result is calculated one by one.
1) The calibration efficiency is low, and the requirement of on-site quick calibration is difficult to meet;
2) The stability of standard pressure is judged, the measurement result is calculated, errors caused by human factors exist, and the reliability of the calibration result is difficult to guarantee;
3) When calibrating, the original test pipeline on site needs to be removed, and the calibration is completed and then recovered, so that the air tightness of the test pipeline on site is reduced.
The present application has been made in view of the above-described technical drawbacks.
It should be noted that the above disclosure of the background art is only for aiding in understanding the inventive concept and technical solution of the present application, which is not necessarily prior art to the present application, and should not be used for evaluating the novelty and the inventive idea of the present application in the case where no clear evidence indicates that the above-mentioned content is already disclosed at the filing date of the present application.
Disclosure of Invention
It is an object of the present application to provide a pressure scanning valve field calibration system and method thereof that overcomes or mitigates at least one of the known technical drawbacks.
The technical scheme of the application is as follows:
in one aspect, a pressure scanning valve field calibration system is provided, comprising:
a nitrogen cylinder;
the pressure supply system is connected with a nitrogen cylinder through a pipeline;
the push valve pressure multiplexer is connected with the pressure supply system through a pipeline and connected with the push valve ports of the pressure scanning valves through pipelines so as to provide rated control pressure for the push valve ports of the pressure scanning valves, and change the state of the valve body inside the pressure scanning valves to enable the pressure measuring channels inside the pressure scanning valves to be communicated;
the digital pressure controller is connected with the pressure supply system through a pipeline;
a standard pressure multiplexer connected with the digital pressure controller through a pipeline and connected with the calibration ports of the pressure scanning valves through pipelines so as to be capable of supplying standard pressure to the calibration ports of the pressure scanning valves;
the network line multiplexer is connected with each pressure scanning valve and the digital pressure controller through network lines;
the computer is connected with the network cable multiplexer through the network cable so as to monitor the digital pressure controller and collect the pressure output value of each pressure scanning valve to obtain the calibration result of each pressure measuring channel in each pressure scanning valve.
Optionally, in the pressure scanning valve on-site calibration system, a pressure reducing valve is arranged on a pipeline between the nitrogen cylinder and the pressure supply system.
Optionally, in the pressure scanning valve on-site calibration system, the digital pressure controller adopts a standard pressure module with a replaceable measuring range.
Optionally, in the above-mentioned pressure scanning valve field calibration system, the method further includes:
the power supply is connected with each pressure scanning valve through a power line so as to supply power for each pressure scanning valve.
In another aspect, a method for calibrating a pressure scanning valve in situ is provided, comprising:
placing the on-site calibration system of the pressure scanning valve in a calibration environment for more than 2 hours;
the position of a pressure scanning valve on-site calibration system is adjusted, so that the digital pressure controller and the calibration ports of the pressure scanning valves are positioned at the same horizontal height;
selecting a measuring range standard pressure module according to the measuring range of the pressure scanning valve, and replacing the measuring range standard pressure module in the digital pressure controller;
turning on the digital pressure controller and the power supply of each pressure scanning valve, and electrifying and preheating for more than 30 min;
communicating the measuring end and the reference end of the digital pressure controller with the atmosphere, and executing zero point correction;
connecting a pressure scanning valve field calibration system with a pipeline between the pressure scanning valves and a network cable thereof;
regulating the pressure of the air supply system, and opening a push valve pressure air circuit valve;
measuring an upper limit pressure value by a pre-pressure scanning valve of a digital pressure controller, and checking tightness;
the physical connection state of the test computer, the digital pressure controller and each pressure scanning valve;
inputting pressure scanning valve information in a computer, wherein the pressure scanning valve information comprises a number, a model, an accuracy grade, a measuring range, a channel number and an IP address;
inputting digital pressure controller information in a computer, wherein the digital pressure controller information comprises a number, a model number, an accuracy level, a traceability validity period and an installation position;
setting calibration information in a computer, wherein the calibration information comprises a calibration pressure point, a calibration cycle number, an environment temperature and humidity and a working medium;
and controlling the standard pressure to sequentially reach each calibration pressure point by a computer, monitoring the steady state of the digital pressure controller in real time, collecting the output value of each pressure measurement channel of each pressure scanning valve after the pressure is stabilized, calculating to obtain the calibration result of each pressure measurement channel of each pressure scanning valve according to the calibration data and the standard pressure value, and storing the calibration result to a designated path according to a template format.
Optionally, in the method for calibrating a pressure scanning valve in situ, the method further includes:
correcting the standard pressure value:
wherein,,
Δp is the measurement error introduced by the height difference, pa;
ρ is the working medium density in the calibrated state, kg/m3;
g is the local gravity acceleration, m/s2;
h is the height difference between the pressure standard and the tested pressure scanning valve in the vertical direction, when the pressure standard position is higher, a positive value is taken, otherwise, a negative value is taken, and m is taken;
p is a standard pressure value, pa;
t is the calibrated ambient temperature, DEG C;
p is the corrected standard pressure value, pa.
Drawings
FIG. 1 is a schematic diagram of a pressure scanning valve field calibration system provided by an embodiment of the present application.
For the purpose of better illustrating the embodiments, certain elements of the drawings are omitted, enlarged or reduced in size and do not represent the actual product dimensions, and furthermore, the drawings are for illustrative purposes only and are not to be construed as limiting the application.
Detailed Description
In order to make the technical solution of the present application and its advantages more clear, the technical solution of the present application will be further and completely described in detail with reference to the accompanying drawings, it being understood that the specific embodiments described herein are only some of the embodiments of the present application, which are for explanation of the present application and not for limitation of the present application. It should be noted that, for convenience of description, only the part related to the present application is shown in the drawings, and other related parts may refer to the general design, and the embodiments of the present application and the technical features of the embodiments may be combined with each other to obtain new embodiments without conflict.
Furthermore, unless defined otherwise, technical or scientific terms used in the description of the application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in the description of the present application are merely used for indicating relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and that the relative positional relationships may be changed when the absolute position of the object to be described is changed, thus not being construed as limiting the application. The terms "first," "second," "third," and the like, as used in the description of the present application, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the application are not to be construed as limiting the amount absolutely, but rather as existence of at least one. As used in this description of the application, the terms "comprises," "comprising," or the like are intended to cover an element or article that appears before the term as such, but does not exclude other elements or articles from the list of elements or articles that appear after the term.
Furthermore, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like in the description of the present application are used in a broad sense, and for example, the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.
The pressure scanning valve is used for synchronously measuring the site multipoint pressure, all channels are independent of each other, the state of the internal valve body can be changed by providing rated control pressure for the valve pushing port of the pressure scanning valve, and the communication of all channels in the pressure scanning valve is realized.
A pressure scanning valve field calibration system comprises a nitrogen cylinder, a pressure supply system, a push valve pressure multiplexer, a digital pressure controller, a standard pressure multiplexer, a network cable multiplexer, a computer and a power supply, wherein the parallel and automatic calibration of the pressure scanning valve field can be realized as shown in figure 1.
The pressure scanning valve on-site calibration system is characterized in that the pressure scanning valve pushing ports which are arranged at the same height are all connected in parallel and uniformly provide control pressure through the use of the pushing valve pressure multiplexer, and meanwhile, the calibration ports are connected in parallel and uniformly supply standard pressure through the use of the standard pressure multiplexer, so that on-site parallel calibration of a plurality of pressure scanning valves can be realized under the condition that original test pipelines on site are not dismounted.
In the pressure scanning valve on-site calibration system, the pressure supply system is designed to decompose the air source pressure into multiple paths of output, and the multiple paths of output are respectively used as the pressure of the push valve of each pressure scanning valve and the high and low range air supply pressure of the digital pressure controller, and the on-off, the regulation and the monitoring of each path of pressure are realized through the valve, the pressure reducing valve and the pressure gauge, so that the effective utilization of the air source pressure is realized, and meanwhile, the risk of pressure overshoot of the digital pressure controller and the pressure scanning valve can be avoided.
In the pressure scanning valve field calibration system, a high-precision digital pressure controller is adopted as a metering standard, a plurality of measuring range standard pressure modules can be simultaneously built in, corresponding measuring range standard pressure modules can be replaced according to requirements in a shutdown state, more than 5 traditional pressure metering standard magnitude transmission capacities can be realized by a single digital pressure controller, the covering of the field calibration capacity of the pressure scanning valve of each model and each measuring range can be realized, the integration level of the pressure scanning valve field calibration system can be effectively improved, and the economic cost of the pressure scanning valve field calibration system is greatly reduced.
In the on-site calibration system of the pressure scanning valves, a digital pressure controller and each pressure scanning valve are physically connected with a computer through a network cable multiplexer, the computer can identify the digital pressure controller and the pressure scanning valves through IP addresses, and the automatic zero clearing, automatic pressure control, steady state identification, pressure emptying, state switching and pressure scanning valve zero clearing, state switching, channel data acquisition and coefficient correction of the digital pressure controller are realized through sending control instructions and receiving feedback data, and the calibration process data are automatically generated according to a template format, so that the full automation of the calibration process can be realized.
Due to the limitation of the site installation position of the pressure scanning valve, a certain height difference exists between the metering standard and the pressure scanning valve in the vertical direction in the site calibration process, and due to the dead weight of working media such as nitrogen, the height difference introduces a certain measurement error, and the measurement error introduced by the height difference is calculated as follows:
wherein,,
Δp is the measurement error introduced by the height difference, pa;
ρ is the working medium density in the calibrated state, kg/m3;
g is the local gravity acceleration, m/s2;
h is the height difference between the pressure standard and the tested pressure scanning valve in the vertical direction, when the pressure standard position is higher, a positive value is taken, otherwise, a negative value is taken, and m is taken;
p is a standard pressure value, pa;
t is the calibrated ambient temperature, DEG C.
When the measurement error introduced by the height difference reaches 1/10 of the maximum allowable error of the pressure scanning valve, the correction is needed, and the correction is realized by adopting a parallel calibration working mode through a method for correcting standard pressure, and the method is concretely as follows:
wherein,,
p is the corrected standard pressure value, pa.
Based on the pressure scanning valve on-site calibration system disclosed in the above embodiment, calibration of a plurality of pressure scanning valves is performed simultaneously, specifically as follows:
placing the on-site calibration system of the pressure scanning valve in a calibration environment for more than 2 hours;
the position of a pressure scanning valve on-site calibration system is adjusted, so that the digital pressure controller and the calibration ports of the pressure scanning valves are positioned at the same horizontal height;
selecting a measuring range standard pressure module according to the measuring range of the pressure scanning valve, and replacing the measuring range standard pressure module in the digital pressure controller;
turning on the digital pressure controller and the power supply of each pressure scanning valve, and electrifying and preheating for more than 30 min;
communicating the measuring end and the reference end of the digital pressure controller with the atmosphere, and executing zero point correction;
connecting a pressure scanning valve field calibration system with a pipeline between the pressure scanning valves and a network cable thereof;
regulating the pressure of the air supply system, and opening a push valve pressure air circuit valve;
measuring an upper limit pressure value by a pre-pressure scanning valve of a digital pressure controller, and checking tightness;
the physical connection state of the test computer, the digital pressure controller and each pressure scanning valve;
inputting pressure scanning valve information in a computer, wherein the pressure scanning valve information comprises a number, a model, an accuracy grade, a measuring range, a channel number and an IP address;
inputting digital pressure controller information in a computer, wherein the digital pressure controller information comprises a number, a model number, an accuracy level, a traceability validity period and an installation position;
setting calibration information in a computer, wherein the calibration information comprises a calibration pressure point, a calibration cycle number, an environment temperature and humidity and a working medium;
and controlling the standard pressure to sequentially reach each calibration pressure point by a computer, monitoring the steady state of the digital pressure controller in real time, collecting the output value of each pressure measurement channel of each pressure scanning valve after the pressure is stabilized, calculating to obtain the calibration result of each pressure measurement channel of each pressure scanning valve according to the calibration data and the standard pressure value, and storing the calibration result to a designated path according to a template format.
Compared with a single-channel manual calibration method, the on-site calibration method for the pressure scanning valve provided by the embodiment of the application can realize multi-channel parallel calibration of the pressure scanning valve without disassembling an original test tube in site, calibrate a plurality of pressure scanning valves at one time, has higher calibration efficiency, can automatically perform the calibration process, can automatically judge the pressure stability state by setting a pressure stability judging principle, can automatically store calibration data and calculate a calibration result according to a set format, can save the time of data processing, and effectively ensure the reliability of the calibration result.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred.
Having thus described the technical aspects of the present application with reference to the preferred embodiments shown in the drawings, it should be understood by those skilled in the art that the scope of the present application is not limited to the specific embodiments, and those skilled in the art may make equivalent changes or substitutions to the related technical features without departing from the principle of the present application, and those changes or substitutions will fall within the scope of the present application.
Claims (6)
1. A pressure scanning valve field calibration system, comprising:
a nitrogen cylinder;
the pressure supply system is connected with a nitrogen cylinder through a pipeline;
the push valve pressure multiplexer is connected with the pressure supply system through a pipeline and connected with the push valve ports of the pressure scanning valves through pipelines so as to provide rated control pressure for the push valve ports of the pressure scanning valves, and change the state of the valve body inside the pressure scanning valves to enable the pressure measuring channels inside the pressure scanning valves to be communicated;
the digital pressure controller is connected with the pressure supply system through a pipeline;
a standard pressure multiplexer connected with the digital pressure controller through a pipeline and connected with the calibration ports of the pressure scanning valves through pipelines so as to be capable of supplying standard pressure to the calibration ports of the pressure scanning valves;
the network line multiplexer is connected with each pressure scanning valve and the digital pressure controller through network lines;
the computer is connected with the network cable multiplexer through the network cable so as to monitor the digital pressure controller and collect the pressure output value of each pressure scanning valve to obtain the calibration result of each pressure measuring channel in each pressure scanning valve.
2. The pressure scanning valve field calibration system of claim 1, wherein,
and a pressure reducing valve is arranged on a pipeline between the nitrogen cylinder and the pressure supply system.
3. The pressure scanning valve field calibration system of claim 1, wherein,
the digital pressure controller adopts a standard pressure module with a replaceable measuring range.
4. The pressure scanning valve field calibration system of claim 1, wherein,
further comprises:
the power supply is connected with each pressure scanning valve through a power line so as to supply power for each pressure scanning valve.
5. A method of calibrating a pressure scanning valve in situ, comprising:
placing the on-site calibration system of the pressure scanning valve in a calibration environment for more than 2 hours;
the position of a pressure scanning valve on-site calibration system is adjusted, so that the digital pressure controller and the calibration ports of the pressure scanning valves are positioned at the same horizontal height;
selecting a measuring range standard pressure module according to the measuring range of the pressure scanning valve, and replacing the measuring range standard pressure module in the digital pressure controller;
turning on the digital pressure controller and the power supply of each pressure scanning valve, and electrifying and preheating for more than 30 min;
communicating the measuring end and the reference end of the digital pressure controller with the atmosphere, and executing zero point correction;
connecting a pressure scanning valve field calibration system with a pipeline between the pressure scanning valves and a network cable thereof;
regulating the pressure of the air supply system, and opening a push valve pressure air circuit valve;
measuring an upper limit pressure value by a pre-pressure scanning valve of a digital pressure controller, and checking tightness;
the physical connection state of the test computer, the digital pressure controller and each pressure scanning valve;
inputting pressure scanning valve information in a computer, wherein the pressure scanning valve information comprises a number, a model, an accuracy grade, a measuring range, a channel number and an IP address;
inputting digital pressure controller information in a computer, wherein the digital pressure controller information comprises a number, a model number, an accuracy level, a traceability validity period and an installation position;
setting calibration information in a computer, wherein the calibration information comprises a calibration pressure point, a calibration cycle number, an environment temperature and humidity and a working medium;
and controlling the standard pressure to sequentially reach each calibration pressure point by a computer, monitoring the steady state of the digital pressure controller in real time, collecting the output value of each pressure measurement channel of each pressure scanning valve after the pressure is stabilized, calculating to obtain the calibration result of each pressure measurement channel of each pressure scanning valve according to the calibration data and the standard pressure value, and storing the calibration result to a designated path according to a template format.
6. The method for in-situ calibration of a pressure scanning valve of claim 5,
further comprises:
correcting the standard pressure value:
wherein,,
Δp is the measurement error introduced by the height difference, pa;
ρ is the working medium density in the calibrated state, kg/m3;
g is the local gravity acceleration, m/s2;
h is the height difference between the pressure standard and the tested pressure scanning valve in the vertical direction, when the pressure standard position is higher, a positive value is taken, otherwise, a negative value is taken, and m is taken;
p is a standard pressure value, pa;
t is the calibrated ambient temperature, DEG C;
p is the corrected standard pressure value, pa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310569775.XA CN116625575A (en) | 2023-05-19 | 2023-05-19 | Pressure scanning valve on-site calibration system and method thereof |
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| CN202310569775.XA CN116625575A (en) | 2023-05-19 | 2023-05-19 | Pressure scanning valve on-site calibration system and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117213696A (en) * | 2023-11-07 | 2023-12-12 | 南京易信同控制设备科技有限公司 | Multichannel pressure scanning valve based on pressure sensitive core and pressure detection method thereof |
| CN117405287A (en) * | 2023-11-06 | 2024-01-16 | 无锡华阳科技有限公司 | Pressure sensor batch calibration system and implementation method |
-
2023
- 2023-05-19 CN CN202310569775.XA patent/CN116625575A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117405287A (en) * | 2023-11-06 | 2024-01-16 | 无锡华阳科技有限公司 | Pressure sensor batch calibration system and implementation method |
| CN117213696A (en) * | 2023-11-07 | 2023-12-12 | 南京易信同控制设备科技有限公司 | Multichannel pressure scanning valve based on pressure sensitive core and pressure detection method thereof |
| CN117213696B (en) * | 2023-11-07 | 2024-01-30 | 南京易信同控制设备科技有限公司 | Multichannel pressure scanning valve based on pressure sensitive core and pressure detection method thereof |
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