A kind of large space pulsatile flow field three-dimensional measuring apparatusTechnical field
The present invention relates to fluid measurement technical field, it is applied to the three of space pulsatile flow field velocity particularly to a kind ofDimension rapid measurement device.
Background technology
Flow field measurement technique is the basic flow phenomenon of Study of Fluid and flow behavior and carries out deep spy to its physical mechanismThe necessary technology means of rope.Current flow field measurement method mainly has (1) pitot tube velocimetry；(2) hot line/hotting mask velocimetry；(3) ldv (laser doppler velocity) laser-Doppler and correlation technique；(4)piv(particle imageVelocimetry) technology etc., need to carry out pointwise when measuring using pitot tube or hot line method for the flow field survey in spaceMeasurement, measurement difficulty is big, wastes time and energy, is required for trace particle using ldv and piv technology, and is to apply in small-sized surveyIn amount region.Measurement for large space pulsatile flow field applies above-mentioned technology all to have larger limitation, such as in large-scale electricityHow designated area is determined using the method such as ribbon method or hot-wire anemometer point-to-point measurement in the aerodynamic field measurement process of boiler of standingVELOCITY DISTRIBUTION, is only capable of qualitative analyses and observes air flow condition in burner hearth it is impossible to accurately reflect the three-dimensional flow field situation in stove,Accurately quickly measurement large space aerodynamic field is significant for the safe and stable operation of the large-scale flow field such as boiler Space Facilities.
At present technology when measuring for large space there is problems in that
1) adopt the measuring apparatus points such as hot-wire anemometer more, need to be positioned beforehand through wire gauze, and in measurementDuring need capturing position, waste time and energy.
2) accurate measurement to large space flow field cannot be realized it is impossible to react the three-dimensional time of day in large space flow field.
Content of the invention
It is an object of the invention to provide a kind of quick measurement large space pulsatile flow field three-dimensional measuring apparatus, realize to large spaceThe quick accurate measurement of pulsatile flow field.
The present invention adopts the following technical scheme that and is achieved:
A kind of large space pulsatile flow field three-dimensional measuring apparatus, including the five-hole probe being built-in with inertial sensor, five holes are visitedPin connects pressure transmitter, and pressure transmitter is connected with five-hole probe data processing unit, inertial sensor and inertial sensorData processing unit is connected；Five-hole probe data processing unit and inertial sensor data processing unit and data coupling processingUnit is connected；Data coupling processing unit is attached with data record unit.
Further, described five-hole probe includes pressure-measuring head and 5 pressure taps being located on pressure-measuring head, and each pressure tap connects respectivelyLogical 5 pressure-measuring pipes, each pressure tap is connected to pressure transmitter by pressure-measuring pipe respectively.
Further, described 5 pressure taps include a centre bore and along the five-hole probe prism two outside centre boreTo symmetrical pressure port, pressure axially bored line is 45 ° with centre bore axis angle.
Further, described inertial sensor is rigidly secured to inside five-hole probe, and inertial sensor passes through inertial sensorTransmission line is connected with inertial sensor data processing unit.
Further, described pressure-measuring head is additionally provided with the inertial sensor integrated circuit being connected with inertial sensor, inertia passesSensor transmission line connects inertial sensor integrated circuit and inertial sensor data processing unit respectively.
Further, described inertial sensor includes three axis accelerometer and three-axis gyroscope.
Further, described data coupling processing unit will be by five-hole probe measured by inertial sensor relative to this spatial flowRelative velocity off field records velocity with relative deflection angle and carries out speed correction and coordinate transform to five-hole probe, obtainsVelocity under unified coordinate system, sets up the three-dimensional flow field in this space by multimetering.
The having the advantages that of technical solution of the present invention
1) when carrying out space flow field measurement, by inertial sensor record locus, realize the real-time of measurement apparatusPositioning.
2) measured in real time in measurement process and to the velocity of this point, realized large space pulsatile flow field speed arrowThe quick real-time positioning measurement of amount.
3) in measurement process, using inertial sensor porous probe is recorded velocity carry out real-time scalar correction andAdjustment in direction, improves the accuracy of the data of porous probe measurement.
4) using data acquisition processing system, porous probe characteristics curve is carried out with automatic real-time processing, reduce and manually doIn advance, time-consuming raising data result degree of accuracy.
Present configuration is simple and reliable, easy to use applied widely, can achieve the measurement to pulsatile flow field velocity,And improve maximum detection amount direction angle range and the precision of five-hole probe.
Brief description
With reference to the accompanying drawings and detailed description the present invention is described in further details.
Fig. 1 is a kind of present invention large space pulsatile flow field three-dimensional measuring apparatus schematic diagram；
Fig. 2 (a) is five-hole probe cut-away view of the present invention；Fig. 2 (b) is Fig. 2 (a) left view；Fig. 2 (c) is Fig. 2 (a)Top view；Fig. 2 (d) is three-dimensional axonometric drawing.
Fig. 3 (a), Fig. 3 (b) are five-hole probe sensor Local map of the present invention respectively.
In figure: 1. five-hole probe；2. pressure tap；21. gaging holes；22. gaging holes；23. gaging holes；24. gaging holes；25. surveysHole；3. five-hole probe rear end cap；4. inertial sensor；41. inertial sensor integrated circuits；5. inertial sensor transmission line；6. pressure-measuring pipe；7. pressure transmitter；8. five-hole probe data processing unit；9. inertial sensor data processing unit；10. dataCoupling processing unit；11. data record units.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention is described in further details.
Refer to shown in Fig. 1, a kind of present invention large space pulsatile flow field three-dimensional measuring apparatus, including being built-in with inertia sensingThe five-hole probe 1 of device 4, five-hole probe 1 connects data acquisition processing system, the inclusion pressure transmitter 7, five of data collecting systemHole probe data processing unit 8, inertial sensor data processing unit 9, data coupling processing unit 10 data recording unit11.The pressure-measuring pipe 6 of five-hole probe 1 connects pressure transmitter 7, and pressure transmitter 7 is connected with five-hole probe data processing unit 8,The pressure signal of pressure tap 2 is changed into the signal of telecommunication and enters five-hole probe data processing unit 8；Inertial sensor 4 is passed with inertiaSensor data processing unit 9 is connected；Handled by five-hole probe data processing unit 8 and inertial sensor data processing unit 9Data afterwards enters data coupling processing unit 10；Data coupling processing unit 10 and data record unit 11 are attached.
As shown in Fig. 2 (a)-(d), five-hole probe 1 includes pressure-measuring head and 5 pressure taps 2 altogether being located on pressure-measuring head, respectivelyPressure tap 2 connects 5 pressure-measuring pipes 6 respectively；It is provided with five-hole probe rear end cap 3 in pressure measurement back of head, inertial sensor 4 rigidly fixesInside five-holed probe, each pressure tap 2 is connected to pressure transmitter 7 by pressure-measuring pipe 6 respectively, and inertial sensor 4 passes throughInertial sensor transmission line 5 is connected with inertial sensor data processing unit 9.
As shown in Fig. 2 (a)-(c), 5 pressure taps 2 (gaging hole 21- gaging hole 25) of five-hole probe are phases with pressure-measuring pipe 6Connection.
As shown in Fig. 3 (a), (b), inertial sensor 4 is located on rear side of spherical 5 pressure taps 2 of pressure-measuring head, inertia sensingDevice 4 is connected with inertial sensor integrated circuit 41 and is connected by inertial sensor transmission line 5 and processes to inertial sensor dataUnit 9.
As shown in Figure 1, five pressure-measuring-points of five-holed probe first are connected to operation principle by pressure measurement pipelineOn pressure transmitter 7, five-hole probe 1 is placed in large space pulsatile flow field, five-hole probe 1 starts to arrange zero during measurementThe original positive direction with five-hole probe 1；By five-hole probe, single-point in pulsatile flow field is carried out with the measurement of velocity.Under coordinate systemOther coordinate positions all be integrated carrying out really with the relative position of zero by the acceleration that inertial sensor 4 measuresFixed；Under coordinate system, the probe relative direction of other coordinate points is integrated and coordinate by the angular velocity that inertial sensor 4 measuresThe relative angle of the original positive direction of initial point is determined；The three axis accelerometer of inertial sensor 4 can be to five-hole probe threeAcceleration in dimension space measures, and determines pulsatile flow field relative position the speed of this position that five-hole probe can be recordedVector carries out the relative velocity vector correction of the relatively primitive coordinate system of five-hole probe, and three axis angular rate gyroscopes can be to five-hole probeAngular velocity in three dimensions measures.The rate-of-turn gyroscope of inertial sensor carries out coordinate system to velocity measured vectorConversion.Five-hole probe 1 pressure tap 21, pressure tap 22, pressure tap 23, pressure tap 24, pressure tap under the action of the forces of the wind25 produce pressure signal respectively, and data acquisition processing system carries out automatic detection to the measurement range of five-hole probe, if exceedingFive-hole probe test scope will be prompted to adjust probe windward side.The pressure parameter of five-hole probe is transformed to mark by pressure transmitter 7The quasi- signal of telecommunication.The velocity in the flow field of current point, velocity bag can be calculated by five-hole probe data processing unit 8Include the size and Orientation of speed；In data coupling processing unit 11, passed with inertia using the velocity that five-hole probe recordsThe five-hole probe that sensor records carries out velocity correction and coordinate relative to the relative velocity under this space and deflection angle relativelyConversion, obtains the velocity of this position coordinates under original coordinate system；By data record unit 11 to the speed being surveyed this positionDegree vector is recorded.The pressure signal that five-hole probe data processing unit can be sent into pressure transmitter 7 is made whether to surpassRange judges, the point outranging can be carried out judge to reject.By inertial sensor can to the position of velocity measured vector andAngle is quickly determined, the velocity in large space pulsatile flow field is carried out drawing large space stable state after a large amount of surveying recordsThree-dimensional flow field.
Ultimate principle, principal character and the advantages of the present invention of the present invention have been shown and described above.The technology of the industry, it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description is originally for personnelThe principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changesChange and improvement both falls within scope of the claimed invention.Claimed model field by appending claims and itsEquivalent thereof.