CN114088335B - Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe - Google Patents
Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe Download PDFInfo
- Publication number
- CN114088335B CN114088335B CN202210029277.1A CN202210029277A CN114088335B CN 114088335 B CN114088335 B CN 114088335B CN 202210029277 A CN202210029277 A CN 202210029277A CN 114088335 B CN114088335 B CN 114088335B
- Authority
- CN
- China
- Prior art keywords
- pneumatic probe
- pressure data
- pneumatic
- data
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000523 sample Substances 0.000 title claims abstract description 113
- 230000033001 locomotion Effects 0.000 title claims abstract description 38
- 238000000691 measurement method Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000012546 transfer Methods 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 238000012937 correction Methods 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 11
- 238000005457 optimization Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract description 14
- 238000012360 testing method Methods 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a constant flow field rapid measurement method based on forward and reverse continuous movement of a pneumatic probe. The invention belongs to the technical field of pneumatic testing. The measuring method comprises the steps of obtaining two groups of pressure measurement data through forward and reverse continuous movement of a pneumatic probe, firstly carrying out low-pass filtering processing without phase deviation, then setting a coefficient of a transfer function of a pressure recurrence formula of a discrete system for correction, obtaining the two groups of corrected pressure measurement data, then utilizing continuous and synchronous collected pneumatic probe position information interpolation to obtain the corrected pressure measurement data at the same spatial position, and finally taking the average value of the forward corrected pressure measurement data and the reverse corrected pressure measurement data at the same spatial position as the final pressure measurement data of the pneumatic probe. The measuring method can remarkably improve the testing efficiency of the pneumatic parameters of the steady flow field of the pneumatic probe, reduce the testing cost, has no additional hardware equipment, is convenient to implement and has strong environmental adaptability.
Description
Technical Field
The invention belongs to the technical field of pneumatic testing, and particularly relates to a constant flow field rapid measuring method based on forward and reverse continuous movement of a pneumatic probe.
Background
The standard pneumatic probe measuring system is composed of a pneumatic probe, a pressure measuring hose, a pressure sensor (a pressure scanning valve) and the like, and is generally used for measuring pneumatic parameters of a steady-state constant flow field. Because the lumen effect formed by the pneumatic probe and the pressure measuring hose can cause the lag of the variable pressure signal measured by the pressure sensor connected to the tail end of the pressure measuring hose, when the pneumatic probe is used for measuring the flow field parameters of different spatial positions, a discrete point measuring mode is usually adopted, namely after the pneumatic probe reaches a measuring point position, a certain time is needed to wait, and the pressure of the pressure pipeline to be measured is measured after reaching the balance. However, when the number of spatial measuring points required for measurement is large or the stabilization time of the pressure measuring pipeline is long, the measurement mode greatly increases the test measurement time.
Currently, a constant flow field rapid measurement method based on forward and reverse continuous movement of a pneumatic probe is urgently needed to be developed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for quickly measuring a steady flow field based on forward and reverse continuous movement of a pneumatic probe.
The constant flow field rapid measurement method based on the forward and reverse continuous movement of the pneumatic probe obtains two groups of pressure measurement data through the forward and reverse continuous movement of the pneumatic probe to perform low-pass filtering processing without phase deviation. By setting
The coefficient of the transfer function of the order discrete system pressure recurrence formula can obtain two groups of corrected pressure measurement data after correction, and the two groups of corrected pressure measurement data can obtain the corrected pressure measurement data at the same spatial position by utilizing the position information interpolation of the pneumatic probe continuously and synchronously acquired. And taking the average value of the forward corrected pressure measurement data and the reverse corrected pressure measurement data of the same spatial position as the final corrected pressure measurement data of the pneumatic probe.
The invention discloses a method for rapidly measuring a steady flow field based on forward and reverse continuous movement of a pneumatic probe, which comprises the following steps of:
s10, if the dynamic characteristic parameters of the pressure transmission of the pneumatic probe pipeline system under the condition of the constant flow field are obtained, the step S100 is carried out, and if not, the step S20 is carried out;
s20, mounting a pneumatic probe on a displacement mechanism of the wind tunnel, wherein the pneumatic probe is connected with a pressure measuring hose, and the tail end of the pressure measuring hose is connected with a pressure signal measuring device; starting the wind tunnel, and after the flow field is stable, accelerating the displacement mechanism from rest to uniform speed along the positive direction and then decelerating to rest so that the pneumatic probe continuously moves from a starting point to an end point; then, the displacement mechanism accelerates from a static state to a uniform speed which is the same as the forward direction along the reverse direction and then decelerates to the static state, so that the pneumatic probe moves from the end point to the starting point; in the movement process, the data acquisition system synchronously acquires the position data and the measured pressure data of the pneumatic probe at the same sampling rate;
s30, performing low-pass filtering processing without phase deviation on the measured pressure data;
performing low-pass filtering processing without phase deviation on the measured pressure data obtained by the continuous movement of the pneumatic probe, and recording the processed measured pressure data sequence as
；
S40, establishing a corrected pressure data sequence according to the linear discrete system theory
The recurrence formula of (c) is as follows:
in the formula,
and
the subscript of (a) denotes the sequence number of the data sequence,
in order to be the order of the system,
taking out 3 or 4 of the raw materials,
、
the dynamic characteristic parameters of the pneumatic probe pipeline system are obtained;
，
in order to measure the amount of pressure data,
；
s50, setting dynamic characteristic parameters of the pneumatic probe pipeline system in the formula (1)
、
Estimating an initial value;
s60, calculating according to a formula (1) to obtain corrected pressure data;
because the pneumatic probe is in a static state before starting to move, the pressure of the pipeline system is in a balanced state, and the measured pressure at the tail end of the pipeline is the same as the pressure actually sensed by the measuring hole of the probe, the formula (1) is used for controlling the pressure of the pipeline system to be in a static state
，
Then, sequentially carrying out recursion calculation by a formula (1) to obtain corrected pressure data;
s70, carrying out interpolation processing on the corrected pressure data according to the synchronously acquired position data of the pneumatic probe, and respectively obtaining the spatial distribution of the corrected pressure data of the forward motion and the corrected pressure data of the reverse motion at the same position;
s80, calculating the deviation and the data sequence of the pressure data after the forward correction and the pressure data after the reverse correction at the same spatial positionyCalculating the square sum of all data deviations according to the pressure values at the extreme value points and the corresponding corrected pressure value deviations;
s90, continuously adjusting the dynamic characteristic parameters set in the step S50 through an iterative optimization method
、
Repeating the steps S50-S80 until the sum of squares of all data deviations is minimum; taking the average value of the forward corrected pressure data and the reverse corrected pressure data of the same spatial position as the final corrected pressure data of the pneumatic probe; step S110 is executed;
s100, mounting a pneumatic probe on a displacement mechanism of the wind tunnel, wherein the pneumatic probe is connected with a pressure measuring hose, and the tail end of the pressure measuring hose is connected with a pressure signal measuring device; starting the wind tunnel, after a flow field is stabilized, enabling the pneumatic probe to accelerate from a static state to a uniform speed and then decelerate to the static state by the displacement mechanism according to a preset route, and continuously moving to a terminal point, and synchronously acquiring the position of the probe and measured pressure data by the data acquisition system at a sampling rate identified by the dynamic transfer characteristic of a pneumatic probe pipeline system; carrying out low-pass filtering processing without phase deviation on the measured pressure data; acquiring corrected pressure data by formula (1);
and S110, outputting the position coordinates and the corresponding corrected pressure data.
Further, the natural frequency of the pressure signal measuring device in the step S20 and the step S100 is greater than or equal to 100 Hz.
Further, the sampling rate range of the digital sampling system in the step S20 and the step S100 is 10 Hz-100 Hz.
Further, in step S100, when the corrected pressure data is obtained according to the formula (1)
，
。
In short, the method for rapidly measuring the steady flow field based on the forward and reverse continuous movement of the pneumatic probe does not need to perform a dynamic characteristic calibration test of a probe pipeline system in advance, but directly drives the pneumatic probe to respectively perform forward and reverse continuous movement in the flow field by the displacement mechanism, corrects the forward and reverse movement measurement data of the probe, minimizes the deviation of the pressure data after the forward and reverse movement correction of the probe by an iterative optimization method, and finally obtains the real pressure change sensed by the continuous movement measuring hole position of the pneumatic probe.
Specifically, the constant flow field rapid measurement method based on the forward and reverse continuous movement of the pneumatic probe drives the pneumatic probe to continuously move in the forward direction and the reverse direction in the measured flow field respectively by the displacement mechanism, and the data acquisition system synchronously acquires probe position data and probe pipeline tail end pressure measurement data. In order to avoid the influence of high-frequency pulsation noise signals, the measured pressure data is subjected to low-pass filtering processing without phase deviation. And establishing a recursion formula for correcting the pressure data sequence according to a linear discrete system theory, giving an estimated initial value of a dynamic characteristic parameter of a pneumatic probe pipeline system, and correcting the forward and reverse continuous motion measurement data of the pneumatic probe. And carrying out interpolation processing on the corrected forward and reverse pressure data at the same probe position coordinate by utilizing the synchronously acquired probe position information to obtain the spatial distribution of the corrected forward and reverse pressure data under the same position coordinate. And calculating the deviation of the two groups of corrected pressure data, and calculating the deviation of the position data of the pressure extreme point before correction and the corresponding data after correction. And continuously adjusting the dynamic characteristic parameters of the pipeline system by using an iterative optimization method to minimize the square sum of all data deviations. Ideally, the two sets of corrected measured pressure data should have the same value at the same spatial position, and the pneumatic probe pipeline system is generally an over-damped system, and the input signal of the pneumatic probe pipeline system should pass through the extreme point of the output signal, and the dynamic characteristic parameters of the pneumatic probe pipeline system can be continuously optimized by an iterative optimization method, so that the sum of squares of deviations of the pressure values of the two sets of corrected measured pressure data at a plurality of the same spatial positions and the sum of squares of deviations of the pressure values at the extreme point of the output signal and the corresponding corrected measured pressure data are minimized. And finally, taking the average value of the pressure data corrected by the forward and reverse movements of the probe at the same spatial position after the optimization iterative convergence as the pressure data corrected by the continuous movement of the pneumatic probe, namely the pressure spatial distribution actually sensed by the measuring hole position of the pneumatic probe.
The method for rapidly measuring the steady flow field based on the forward and reverse continuous motion of the pneumatic probe can conveniently and effectively adapt to various steady flow field environments of the pneumatic probe, can only carry out continuous motion measurement on the pneumatic probe in one direction when the distribution characteristics of the steady flow field are not changed greatly, and utilizes the dynamic transfer characteristics of a pneumatic probe pipeline system of an approximate steady flow field
And acquiring corrected measured pressure data by using an order discrete system pressure recurrence formula.
The method for rapidly measuring the steady flow field based on the forward and reverse continuous movement of the pneumatic probe can obviously improve the efficiency of testing the pneumatic parameters of the steady flow field of the pneumatic probe and reduce the test cost, and meanwhile, compared with the traditional discrete point measurement mode, the method has no newly added measurement hardware equipment, is convenient to implement and has strong environmental adaptability.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
Before the wind tunnel test is carried out, the pneumatic probe of the embodiment already obtains the dynamic transfer characteristic of the pneumatic probe pipeline system of the approximate steady flow field. The specific working steps are as follows:
a1. mounting a pneumatic probe on a displacement mechanism of the wind tunnel;
b1. starting the wind tunnel, after the flow field is stable, uniformly moving the pneumatic probe by the displacement mechanism in the steady flow field according to a preset movement route, and acquiring position coordinates and measurement pressure data at a sampling rate identified by the dynamic transfer characteristic of a pneumatic probe pipeline system;
c1. carrying out low-pass filtering processing without phase deviation on the measured pressure data;
d1. according to the dynamic transfer characteristics of the pneumatic probe tube system of the approximate steady flow field
Acquiring corrected measurement pressure data by using an order discrete system pressure recursion formula;
e1. outputting the position coordinates and the final corrected measured pressure data;
example 2
Before the wind tunnel test, the pneumatic probe of the embodiment does not obtain the dynamic transfer characteristic of the pneumatic probe pipeline system of the approximate steady flow field. The specific working steps are as follows:
a2. mounting a pneumatic probe on a displacement mechanism of the wind tunnel; starting the wind tunnel, after the flow field is stable, accelerating the displacement mechanism from rest to uniform speed and then decelerating the displacement mechanism to rest along the positive direction, and moving the pneumatic probe from a starting point to an end point; then, the displacement mechanism accelerates from rest to uniform speed and then decelerates to rest along the reverse direction, and the pneumatic probe moves from the end point to the starting point; in the movement process, the pressure acquisition and test system synchronously acquires spatial position and measured pressure data at the same sampling rate;
b2. carrying out low-pass filtering processing without phase deviation on the measured pressure data;
carrying out low-pass filtering processing without phase deviation on the measured pressure data obtained by the continuous motion measurement of the pneumatic probe;
c2. setting up
Coefficients of transfer function of order discrete system pressure recurrence formula
、
；
d2. According to
Acquiring corrected measurement pressure data by using an order discrete system pressure recursion formula;
for the same sampling rate, the
Corrected measured pressure data of individual measured values
Obtained by the following recursion formula:
after the deployment:
wherein,
，
in order to measure the amount of pressure data,
；
e2. carrying out interpolation processing on the corrected measured pressure data to obtain the forward corrected measured pressure data and the reverse corrected measured pressure data at the same spatial position;
f2. calculating the square sum of the deviations of the forward corrected measured pressure data and the reverse corrected measured pressure data of the same spatial position and the square sum of the deviations of the pressure values at the extreme points of the output signal and the corresponding corrected pressure values, continuously adjusting the coefficients of the transfer function of step c2
、
Repeating the steps c 2-e 2 until the square sum of the two deviations reaches the minimum or is in a given deviation range; taking the average value of the forward corrected measured pressure data and the reverse corrected measured pressure data of the same spatial position as the final corrected measured pressure data of the pneumatic probe;
g2. and outputting the position coordinates and the final corrected measured pressure data.
Further, the coefficient of the transfer function of step c2
、
There are two setting methods:
first, the dynamic transfer characteristics of the pneumatic probe piping system, in which an approximate steady flow field has been obtained, are set
Coefficients of transfer function of order discrete system pressure recurrence formula
、
；
Secondly, assuming that the pneumatic probe is in a pressure balance state at the starting point position of starting movement, wherein the measured value of the pressure sensor is the pressure value actually sensed by the pneumatic probe at the starting point position; because the input value of the pneumatic probe in the pressure balance state is equal to the output value, namely when the frequency is 0, the gain value of the system is 1, and the dynamic characteristic parameters have the following constraint relation:
setting according to equation (3)
Coefficients of transfer function of order discrete system pressure recurrence formula
、
。
Further, assuming that the pneumatic probe is in a pressure balance state at the starting point position where the pneumatic probe starts to move, at this time, a measured value of the pressure sensor is a pressure value actually sensed by the pneumatic probe at the starting point position; step e2 is to make the measurement of equation (2) before it is initiated
，
。
Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, but it can be applied to various fields suitable for the present invention. Additional modifications and adaptations may readily occur to those skilled in the art without departing from the principles of the present invention and the present invention is therefore not limited to the specific details disclosed herein without departing from the general concept defined by the claims and their equivalents.
Claims (4)
1. A constant flow field rapid measurement method based on forward and reverse continuous movement of a pneumatic probe is characterized by comprising the following steps:
s10, if the dynamic characteristic parameters of the pressure transmission of the pneumatic probe pipeline system under the condition of the constant flow field are obtained, the step S100 is carried out, and if not, the step S20 is carried out;
s20, mounting a pneumatic probe on a displacement mechanism of the wind tunnel, wherein the pneumatic probe is connected with a pressure measuring hose, and the tail end of the pressure measuring hose is connected with a pressure signal measuring device; starting the wind tunnel, and after the flow field is stable, accelerating the displacement mechanism from rest to uniform speed along the positive direction and then decelerating to rest so that the pneumatic probe continuously moves from a starting point to an end point; then, the displacement mechanism accelerates from a static state to a uniform speed which is the same as the forward direction along the reverse direction and then decelerates to the static state, so that the pneumatic probe moves from the end point to the starting point; in the movement process, the data acquisition system synchronously acquires the position data and the measured pressure data of the pneumatic probe at the same sampling rate;
s30, performing low-pass filtering processing without phase deviation on the measured pressure data;
performing low-pass filtering processing without phase deviation on the measured pressure data obtained by the continuous movement of the pneumatic probe, and recording a processed measured pressure data sequence as y;
s40, establishing a corrected pressure data sequence according to the linear discrete system theory
The recurrence formula of (c) is as follows:
in the formula,
and
subscripts of (a) respectively denote a corrected pressure data series
And measuring the pressure data sequence
The serial number of (a) is included,
in order to be an order of the pneumatic probe tubing system,
taking out 3 or 4 of the raw materials,
、
the dynamic characteristic parameters of the pneumatic probe pipeline system are obtained;
，
in order to measure the amount of pressure data,
；
s50, setting dynamic characteristic parameters of the pneumatic probe pipeline system in the formula (1)
、
Estimating an initial value;
s60, calculating according to a formula (1) to obtain corrected pressure data;
because the pneumatic probe is in a static state before the pneumatic probe starts to move, the pressure of a pipeline system of the pneumatic probe is in a balanced state, and the measured pressure at the tail end of the pipeline is the same as the pressure actually sensed by the measuring hole of the probe, the formula (1) shows that
，
Then, sequentially calculating recurrently by a formula (1) to obtain corrected pressure data;
s70, performing interpolation processing on the corrected pressure data according to the synchronously acquired position data of the pneumatic probe to respectively obtain the corrected pressure data of forward motion at the same position, namely the spatial distribution of the forward corrected pressure data, and the corrected pressure data of reverse motion, namely the spatial distribution of the reverse corrected pressure data;
s80, calculating forward correction pressure data of the same positionAnd reverse correcting the data deviation of the pressure data and the data sequenceyCalculating the square sum of all data deviations according to the data deviations of the pressure value at the extreme value point and the corresponding corrected pressure data;
s90, continuously adjusting the dynamic characteristic parameters set in the step S50 through an iterative optimization method
、
Repeating the steps S50-S80 until the sum of squares of all data deviations is minimum; taking the average value of the forward correction pressure data and the reverse correction pressure data of the same spatial position as the final correction pressure data of the pneumatic probe; step S110 is executed;
s100, mounting a pneumatic probe on a displacement mechanism of the wind tunnel, wherein the pneumatic probe is connected with a pressure measuring hose, and the tail end of the pressure measuring hose is connected with a pressure signal measuring device; starting the wind tunnel, after a flow field is stabilized, enabling the pneumatic probe to accelerate from a static state to a uniform speed and then decelerate to the static state by the displacement mechanism according to a preset route, and continuously moving to a terminal point, and synchronously acquiring position data and measurement pressure data of the pneumatic probe by the data acquisition system at a sampling rate identified by the dynamic transfer characteristic of a pneumatic probe pipeline system; carrying out low-pass filtering processing without phase deviation on the measured pressure data; acquiring corrected pressure data by formula (1);
and S110, outputting the position coordinates and the corresponding corrected pressure data.
2. The method for rapidly measuring the constant flow field based on the forward and reverse continuous movement of the pneumatic probe as claimed in claim 1, wherein the natural frequency of the pressure signal measuring device in the steps S20 and S100 is greater than or equal to 100 Hz.
3. The method for rapidly measuring the steady flow field based on the forward and reverse continuous motion of the pneumatic probe as claimed in claim 1, wherein the sampling rate of the digital sampling system in the steps S20 and S100 is in the range of 10 Hz-100 Hz.
4. The method for rapidly measuring the steady flow field based on the forward and reverse continuous movements of the pneumatic probe as claimed in claim 1, wherein the step S100 is executed when the corrected pressure data is obtained from the formula (1)
，
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029277.1A CN114088335B (en) | 2022-01-12 | 2022-01-12 | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029277.1A CN114088335B (en) | 2022-01-12 | 2022-01-12 | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114088335A CN114088335A (en) | 2022-02-25 |
| CN114088335B true CN114088335B (en) | 2022-04-08 |
Family
ID=80308610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210029277.1A Active CN114088335B (en) | 2022-01-12 | 2022-01-12 | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114088335B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452313B (en) * | 2022-11-14 | 2023-03-24 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for quickly calibrating angular sensitivity of probe in sonic explosion test |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5929331A (en) * | 1997-01-14 | 1999-07-27 | The Texas A&M University System | Multi-directional, three component velocity measurement pressure probe |
| CN101655406A (en) * | 2009-09-11 | 2010-02-24 | 中国铁道科学研究院机车车辆研究所 | Method and device for zero point calibration of gas pressure sensor |
| DE202012103700U1 (en) * | 2012-09-26 | 2012-10-22 | Ming Lu | Measuring device for measuring the pressure and the velocity of a vortex flow field |
| CN104807508A (en) * | 2015-04-13 | 2015-07-29 | 浙江大学 | Digital display flow meter for experiment teaching based on piezometer tube display and measuring method thereof |
| CN107101798A (en) * | 2017-05-12 | 2017-08-29 | 中国科学院工程热物理研究所 | A kind of dynamic five-hole probe |
| CN110441027A (en) * | 2019-09-10 | 2019-11-12 | 中国航发沈阳发动机研究所 | A kind of modification method controlling the null offset of probe automatic tracking system |
| CN110793745A (en) * | 2019-12-04 | 2020-02-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Supersonic wind tunnel flow calibration and measurement pressure hose protection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220348B (en) * | 2020-03-06 | 2024-10-01 | 上海海事大学 | Composite five-hole pressure-temperature probe |
| CN111498141B (en) * | 2020-04-21 | 2021-10-01 | 中国人民解放军空军工程大学 | Method and device for realizing real-time monitoring of airflow angle based on micro probe |
-
2022
- 2022-01-12 CN CN202210029277.1A patent/CN114088335B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5929331A (en) * | 1997-01-14 | 1999-07-27 | The Texas A&M University System | Multi-directional, three component velocity measurement pressure probe |
| CN101655406A (en) * | 2009-09-11 | 2010-02-24 | 中国铁道科学研究院机车车辆研究所 | Method and device for zero point calibration of gas pressure sensor |
| DE202012103700U1 (en) * | 2012-09-26 | 2012-10-22 | Ming Lu | Measuring device for measuring the pressure and the velocity of a vortex flow field |
| CN104807508A (en) * | 2015-04-13 | 2015-07-29 | 浙江大学 | Digital display flow meter for experiment teaching based on piezometer tube display and measuring method thereof |
| CN107101798A (en) * | 2017-05-12 | 2017-08-29 | 中国科学院工程热物理研究所 | A kind of dynamic five-hole probe |
| CN110441027A (en) * | 2019-09-10 | 2019-11-12 | 中国航发沈阳发动机研究所 | A kind of modification method controlling the null offset of probe automatic tracking system |
| CN110793745A (en) * | 2019-12-04 | 2020-02-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Supersonic wind tunnel flow calibration and measurement pressure hose protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114088335A (en) | 2022-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114088335B (en) | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe | |
| CN110553786B (en) | Pressure sensor compensation method and system | |
| CN102095430B (en) | Sensor dynamic error frequency-domain correction technology based on step response | |
| CN113916486B (en) | Low-speed wind tunnel rapid pressure measurement and control method based on multi-parameter pressure regression algorithm | |
| CN111624594B (en) | Networking radar tracking method and system based on conversion measurement reconstruction | |
| CN114046960B (en) | Pneumatic probe steady flow field continuous testing method based on dynamic calibration in advance | |
| CN114323536B (en) | Interpolation method for improving measurement accuracy of five-hole probe | |
| CN111917413A (en) | Method for calibrating time sequence deviation between TI-ADC (time delay-analog converter) channels | |
| CN109683524B (en) | Processing method for sampling and synchronizing sampling signals without sampling and holding | |
| US20210054799A1 (en) | Gas flow rate measurement device and gas flow rate measurement method | |
| US11392148B2 (en) | Flow rate control system, control method of flowrate control system, and control program of flowrate control system | |
| WO2018161377A1 (en) | Method and device for calibrating bluetooth transmitting power | |
| US11929757B2 (en) | Propagation delay compensation and interpolation filter | |
| CN103822570B (en) | Method for compensating for hysteresis characteristics of IPMC displacement sensor based on pseudo feedback | |
| CN108848447B (en) | Differential DV _ Distance node positioning method adopting unknown node correction | |
| CN114710383A (en) | Method for calibrating instrument radio frequency channel frequency response by utilizing OFDM signal | |
| CN1272603C (en) | Dynamic compensation method of multi-input detection system under conditions of cross sensitiveness | |
| CN108152527B (en) | Digital speed measurement method based on median average filtering | |
| JPH09307401A (en) | Distortion compensation method using filter and distortion compensator | |
| CN110186479A (en) | A kind of inertial device error coefficient determines method | |
| CN108471300B (en) | A kind of ratio LMP filtering method based on parameter adjustment under CIM function | |
| CN108240836B (en) | Multi-dimensional broken line segment measuring and calibrating method | |
| CN112887240B (en) | Doppler factor estimation method based on dual Kalman filtering | |
| CN117787018B (en) | Process parameter determining method and system and production system thereof | |
| CN114565679B (en) | Focal length, radial distortion and attitude calibration method based on camera position |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |