CN109813935A - A kind of portable airspeedometer verification system and its working method - Google Patents
A kind of portable airspeedometer verification system and its working method Download PDFInfo
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- CN109813935A CN109813935A CN201910267985.7A CN201910267985A CN109813935A CN 109813935 A CN109813935 A CN 109813935A CN 201910267985 A CN201910267985 A CN 201910267985A CN 109813935 A CN109813935 A CN 109813935A
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Abstract
It takes precautions against natural calamities the invention belongs to rail traffic and examines and determine equipment technology field, disclose a kind of portable airspeedometer verification system and its working method.Portable airspeedometer verification system includes wind tunnel simulation device and wind speed detection device in the present invention；Wind tunnel simulation device includes blower, accelerating sections, steady flow segment, experimental section and diffuser；Wind speed detection device includes at least one Pitot tube；Pitot tube is set to experimental section；One end of Pitot tube is connected with pressure test device.Working method in the present invention, comprising: airspeedometer to be measured is placed in experimental section by S1., opens blower；S2. the calibrating air speed value that the difference and Anemometer to be measured of acquisition Pitot tube dynamic pressure and static pressure arrive；S3. it calculates standard wind speed value and standard wind speed value is compared with calibrating air speed value；S4. judge difference whether in threshold range.The invention enables anemobiagraph calibratings can carry out at the scene such as track, improves calibrating efficiency, saves cost, small in size, light-weight, is moved easily and transports, practicability is high.
Description
Technical field
It takes precautions against natural calamities the invention belongs to rail traffic and examines and determine equipment technology field, and in particular to a kind of portable airspeedometer calibrating system
System and its working method.
Background technique
Currently, the high-speed railway natural calamity and foreign body intrusion disaster monitoring system in China have tended to be perfect, in each iron
Curb line all sets up meteorological sensor, carries out whole day real time monitoring to natural calamity and foreign body intrusion disaster, effectively prevent certainly
Right disaster and emergency event are influenced caused by railways train operation.But since the working environment of meteorological sensor is more severe, again
Belong to the optional calibrating measurement instrument of country, so lacking inspection and maintenance after coming into operation, so that its accuracy be made to drop significantly
It is low, the information of inaccuracy is conveyed to monitoring system, increases the incidence of railway contingency.So being carried out to small-sized weather station
Periodically calibrating is just particularly important, and can the meteorological sensor of damage be repaired and be replaced in time, this is for keeping away
Exempt from railway contingency to have very important significance.
Weather monitoring system is applied to the modern architecture in Japan high-speed railway of the 1960s earliest.It is more and more later
Country has begun setting up the monitoring system to Along Railway weather.Japan is frequently national as a disaster, in Railway Disaster
Monitoring aspect has accumulated experience abundant, forms perfect Railway Disaster monitoring system, realize to wind along the line, rain, flood,
The overall monitor of snow, earthquake, rail temperature and foreign body intrusion etc., ensure that the Shinkansen zero death rate and high punctuality rate.It is Japanese new dry
Line disaster monitoring system, which passes through, is arranged in the monitorings such as rainfall gauge, anemobiagraph, water-level gauge, snow depth meter, seismic detector along the line dress
It sets and invades the disaster monitoring devices such as limit, landslide, mud-rock flow with junk, wind, rain, flood, snow, earthquake and foreign body intrusion disaster are carried out
Monitoring, and monitoring device is periodically calibrated and examined and determine, guarantee the accuracy of monitoring device.
At home, Kunming office along the elder brother's high speed of Shanghai be provided with tipping-bucket rain-gauge 29, wind direction and wind velocity tester 18,
Cloud osmanthus visitor sets up group company, section two-stage prison specially along the line provided with tipping-bucket rain-gauge 37, wind direction and wind velocity tester 40
Control center, whole day carry out real time monitoring and emergency disposal to wind, rain, snow, earthquake, foreign body intrusion system along high-speed rail；Chengdu office
Set up first monitoring system monitoring center of system-wide, enhanced the daily management of monitoring system, manage in Chengdu-Chongqing, Shanghai elder brother, Zheng Yu,
West at, at the 10 a plurality of Along Railway such as expensive is total install anemobiagraph 269, rainfall gauge 211.
Since high-speed railway wind and rain monitoring device belongs to optional calibrating measurement instrument, there are no relevant calibration authority energy
Enough carry out relevant calibration operation, therefore railway parent company plans to be responsible for the calibration of anemobiagraph in 5 laboratories of national Pilot project construction
And calibrating, it builds 3 laboratories and is responsible for rainfall meter calibrating and calibrating, and signed maintenance service contract with equipment supplier, by equipment
Manufacturer sends someone to be safeguarded in stationary point, periodically carries out overhaul of the equipments and dispose dependent failure in time, while constantly lifting means matter
Amount, carries out the statistical analysis of collection in worksite data, sensor is overhauled or replaced in time when there is data exception.But although
In this way, weather monitoring equipment still has the disadvantage in that
A. traditional manually-operated calibration method low efficiency, poor accuracy, large labor intensity, and be easy to generate people
For mistake；
B. current anemobiagraph calibrating can only carry out in laboratory, involve great expense, and the re-testing periods are long, and spare unit quantity is big,
There are the biggish wastings of resources and inconvenient for use.
Summary of the invention
In order to solve the above problems existing in the present technology, it is an object of that present invention to provide a kind of easy to use, land occupation faces
Accumulate small, verification result accurately portable airspeedometer verification system and its working method.
The technical scheme adopted by the invention is as follows:
A kind of portable airspeedometer verification system, including wind tunnel simulation device and wind speed detection device；The wind-tunnel mould
Quasi- device includes blower, further includes the accelerating sections being sequentially communicated, steady flow segment, experimental section and diffuser；The accelerating sections not with
The entrance side of steady flow segment connection is connected to the air outlet of blower.
The wind speed detection device includes at least one Pitot tube；The Pitot tube is set to experimental section；The skin
One end of trustship is connected with the pressure test device for detecting pressure difference in wind tunnel simulation device.
Preferably, the wind speed detection device further includes 2 groups of temperature sensors and 2 groups of humidity sensors；2 groups of temperature
Sensor is located at the entrance side of accelerating sections and the outlet side of diffuser；2 groups of humidity sensors are located at entering for accelerating sections
The outlet side of mouth side and diffuser.
Preferably, being provided with the anti-separation for being rectified to the air-flow for entering accelerating sections in the accelerating sections
Net.
Preferably, the junction of the accelerating sections and steady flow segment is provided with for the air-flow entered in the middle part of steady flow segment
It carries out leading the honeycomb that the large eddies in air-flow are divided into small whirlpool by direct join.
Preferably, the steady flow segment is provided with the damping for eliminating the small whirlpool in the air-flow for passing through honeycomb
Net.
Preferably, the accelerating sections, steady flow segment, experimental section and diffuser length ratio be 2:1:3:1.
Preferably, the entrance side of the accelerating sections, steady flow segment, experimental section and diffuser outlet side relative aperture be 4:
2:2:3。
The working method of above-mentioned portable airspeedometer verification system, comprising the following steps:
S1. airspeedometer to be measured is placed in experimental section, opens blower；
S2. after air-flow after experimental section, the difference that pressure test device detects Pitot tube dynamic pressure and static pressure is obtained in real time,
And the calibrating air speed value that Anemometer to be measured arrives is obtained in real time；
S3. the standard wind speed value at current Pitot tube is calculated according to the difference of Pitot tube dynamic pressure and static pressure, then by standard wind
Fast value is compared to obtain difference with calibrating air speed value；
S4. judge difference whether in threshold range, then airspeedometer assay approval to be measured in this way, such as otherwise airspeedometer to be measured
It examines and determine unqualified.
Preferably, when calculating the standard wind speed value at current Pitot tube, formula is as follows in the step S3:
Wherein, v is standard wind speed value, and K is the instrument coefficient of pressure test device, Δ P be Pitot tube dynamic pressure and static pressure it
Difference, ρ are the fluid density of air-flow.
The invention has the benefit that
1) being used cooperatively by wind tunnel simulation device and wind speed detection device, so that in the prior art must be in large-scale wind
The anemobiagraph calibrating that hole laboratory carries out can carry out at the scene such as track, substantially increase calibrating efficiency, save calibrating work
The personnel cost and time cost of work, meanwhile, by the miniaturization of wind tunnel simulation device so that the present invention have it is small in size, again
Amount is light, the advantages of being moved easily and transporting；
2) the special discrete correction algorithm designed for small-sized wind tunnel is used, overcomes small-sized wind tunnel because blocking bigger draw
The caused measuring wind speed deviation of phenomena such as velocity flow profile risen distorts, so that standard wind speed value is more accurate, so that inspection
Determine accuracy rate raising；
3) the temperature and humidity data acquired in calibrating by temperature sensor and humidity sensor to measurement result into
Row amendment, obtains more accurate standard wind speed value, guarantees the result accurate and effective of calibrating, avoids due to working environment and item
Data error caused by part is complicated and changeable, practicability is high, and it is convenient to operate, and is suitable for promoting the use of.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
In figure: 1- anti-separation net, 2- honeycomb, 3- damping screen, 4- Pitot tube, 5- anemobiagraph to be measured, 6- blower.
Specific embodiment
With reference to the accompanying drawing and specific embodiment does further explaination to the present invention.
Embodiment 1:
As shown in Figure 1, the present embodiment provides a kind of portable airspeedometer verification system, including wind tunnel simulation device and wind speed
Detection device, should also include support frame, and support frame is used to support and fixes wind tunnel simulation device and wind speed detection device.
Wind tunnel simulation device includes blower, further includes the accelerating sections being sequentially communicated, steady flow segment, experimental section and diffuser；Wind
Machine is for generating lasting, stable, adjustable moving air；Accelerating sections, steady flow segment, experimental section and diffuser collective effect are used
In to the air progress water conservancy diversion of flowing, acceleration, current stabilization etc.；The air outlet of entrance side and blower that accelerating sections is not connect with steady flow segment
Connection.The anti-separation net for being rectified to the air-flow for entering accelerating sections, anti-separation are provided in the present embodiment, in accelerating sections
Net enables to the uniformity of air-flow tentatively to be improved；The junction of accelerating sections and steady flow segment be provided with for enter current stabilization
The air-flow at section middle part carries out leading the honeycomb that the large eddies in air-flow are divided into small whirlpool by direct join, and honeycomb makes air-flow
Its flow direction is parallel to wind-tunnel axis after in the middle part of into steady flow segment；Steady flow segment is provided with to be passed through in the air-flow of honeycomb for eliminating
The damping screen of small whirlpool, damping screen effect is to stablize the irregular air-flow of disorder, and the micro cyclone in air-flow of decaying improves airflow direction
With the uniformity of speed so that the Velocity Profiles for eventually passing through steady flow segment are uniform, direction is straight and stablize.
Wind speed detection device includes at least one Pitot tube；Pitot tube is set to experimental section；One end connection of Pitot tube is useful
The pressure test device of pressure difference in detection wind tunnel simulation device, in verification process, Pitot tube passes through the wind speed in wind-tunnel
The form of pressure difference is reflected to pressure test device；Wind speed detection device should include also processing unit, for receiving all data
Final process obtains standard wind speed value.
The present embodiment also provides a kind of working method of above-mentioned portable airspeedometer verification system, comprising the following steps:
S1. airspeedometer to be measured is placed in experimental section, opens blower；Wherein airspeedometer to be measured should be at and Pitot tube
Thus the same section of experimental section avoids verification result caused by position difference inaccurate.
S2. after air-flow after experimental section, the difference that pressure test device detects Pitot tube dynamic pressure and static pressure is obtained in real time,
And the calibrating air speed value that Anemometer to be measured arrives is obtained in real time；
S3. the standard wind speed value at current Pitot tube is calculated according to the difference of Pitot tube dynamic pressure and static pressure, then by standard wind
Fast value is compared to obtain difference with calibrating air speed value；
In the present embodiment, in step S3, when calculating the standard wind speed value at current Pitot tube, formula is as follows:
Wherein, v is standard wind speed value, and K is the instrument coefficient of pressure test device, Δ P be Pitot tube dynamic pressure and static pressure it
Difference, ρ are the fluid density of air-flow；The special discrete correction algorithm designed for small-sized wind tunnel of above-mentioned formula, overcomes Miniature wind
Hole because block it is bigger caused by velocity flow profile distort phenomena such as caused by measuring wind speed deviation.
S4. judge difference whether in threshold range, then airspeedometer assay approval to be measured in this way, such as otherwise airspeedometer to be measured
It examines and determine unqualified.
Embodiment 2
As shown in Figure 1, the present embodiment provides a kind of portable airspeedometer verification system, including wind tunnel simulation device and wind speed
Detection device, should also include support frame, and support frame is used to support and fixes wind tunnel simulation device and wind speed detection device.
Wind tunnel simulation device includes blower, further includes the accelerating sections being sequentially communicated, steady flow segment, experimental section and diffuser；Wind
Machine is for generating lasting, stable, adjustable moving air；Accelerating sections, steady flow segment, experimental section and diffuser collective effect are used
In to the air progress water conservancy diversion of flowing, acceleration, current stabilization etc.；The air outlet of entrance side and blower that accelerating sections is not connect with steady flow segment
Connection.The anti-separation net for being rectified to the air-flow for entering accelerating sections, anti-separation are provided in the present embodiment, in accelerating sections
Net enables to the uniformity of air-flow tentatively to be improved；The junction of accelerating sections and steady flow segment be provided with for enter current stabilization
The air-flow at section middle part carries out leading the honeycomb that the large eddies in air-flow are divided into small whirlpool by direct join, and honeycomb makes air-flow
Its flow direction is parallel to wind-tunnel axis after in the middle part of into steady flow segment；Steady flow segment is provided with to be passed through in the air-flow of honeycomb for eliminating
The damping screen of small whirlpool, damping screen effect is to stablize the irregular air-flow of disorder, and the micro cyclone in air-flow of decaying improves airflow direction
With the uniformity of speed so that the Velocity Profiles for eventually passing through steady flow segment are uniform, direction is straight and stablize.
Wind speed detection device includes at least one Pitot tube；Pitot tube is set to experimental section；One end connection of Pitot tube is useful
The pressure test device of pressure difference in detection wind tunnel simulation device, in verification process, Pitot tube passes through the wind speed in wind-tunnel
The form of pressure difference is reflected to pressure test device；Wind speed detection device should include also processing unit, for receiving all data
Final process obtains standard wind speed value.In the present embodiment, wind speed detection device further includes that 2 groups of temperature sensors and 2 groups of humidity pass
Sensor；2 groups of temperature sensors are located at the entrance side of accelerating sections and the outlet side of diffuser；2 groups of humidity sensors distinguish position
In the entrance side of accelerating sections and the outlet side of diffuser；Thus it is passed in final calculation of wind speed value by temperature sensor and humidity
The temperature and humidity data of sensor acquisition are modified Pitot tube and the air speed value that pressure test device measures, and obtain more quasi-
True standard wind speed value, guarantees final verification result accurate and effective.
The present embodiment also provides a kind of working method of above-mentioned portable airspeedometer verification system, comprising the following steps:
S1. airspeedometer to be measured is placed in experimental section, opens blower；Wherein airspeedometer to be measured should be at and Pitot tube
Thus the same section of experimental section avoids verification result caused by position difference inaccurate.
S2. after air-flow after experimental section, the difference that pressure test device detects Pitot tube dynamic pressure and static pressure is obtained in real time,
And the calibrating air speed value that Anemometer to be measured arrives is obtained in real time；
S3. the standard wind speed value at current Pitot tube is calculated according to the difference of Pitot tube dynamic pressure and static pressure, then by standard wind
Fast value is compared to obtain difference with calibrating air speed value；
In the present embodiment, in step S3, when calculating the standard wind speed value at current Pitot tube, formula is as follows:
Wherein, v is standard wind speed value, and K is the instrument coefficient of pressure test device, Δ P be Pitot tube dynamic pressure and static pressure it
Difference, ρ are the fluid density of air-flow；The special discrete correction algorithm designed for small-sized wind tunnel of above-mentioned formula, overcomes Miniature wind
Hole because block it is bigger caused by velocity flow profile distort phenomena such as caused by measuring wind speed deviation.
S4. judge difference whether in threshold range, then airspeedometer assay approval to be measured in this way, such as otherwise airspeedometer to be measured
It examines and determine unqualified.
Embodiment 3
As shown in Figure 1, the present embodiment provides a kind of portable airspeedometer verification system, including wind tunnel simulation device and wind speed
Detection device, should also include support frame, and support frame is used to support and fixes wind tunnel simulation device and wind speed detection device.
Wind tunnel simulation device includes blower, further includes the accelerating sections being sequentially communicated, steady flow segment, experimental section and diffuser；Wind
Machine is for generating lasting, stable, adjustable moving air；Accelerating sections, steady flow segment, experimental section and diffuser collective effect are used
In to the air progress water conservancy diversion of flowing, acceleration, current stabilization etc.；The air outlet of entrance side and blower that accelerating sections is not connect with steady flow segment
Connection.The anti-separation net for being rectified to the air-flow for entering accelerating sections, anti-separation are provided in the present embodiment, in accelerating sections
Net enables to the uniformity of air-flow tentatively to be improved, and as a preferred embodiment, anti-separation net is 3 layers；Accelerating sections and steady
The junction of stream section is provided with for lead direct join for the large eddies in air-flow point to the air-flow entered in the middle part of steady flow segment
It is segmented into the honeycomb of small whirlpool, its flow direction is parallel to wind-tunnel axis after honeycomb enters air-flow in the middle part of steady flow segment；Steady flow segment
It is provided with the damping screen for eliminating the small whirlpool in the air-flow for passing through honeycomb, damping screen effect is to stablize the irregular gas of disorder
It flows, the micro cyclone in air-flow of decaying improves the uniformity of airflow direction and speed, so that eventually passing through the air-flow of steady flow segment
VELOCITY DISTRIBUTION is uniform, direction is straight and stablizes, and as a preferred embodiment, damping screen is 3 layers.It is accelerating sections, steady in the present embodiment
Flow section, the length ratio of experimental section and diffuser is 2:1:3:1, as a preferred embodiment, accelerating sections, steady flow segment, experimental section and
The length of diffuser is followed successively by 800mm, 400mm, 1200mm and 400mm；Entrance side, steady flow segment, experimental section and the expansion of accelerating sections
The outlet side relative aperture for pressing section is 4:2:2:3, as a preferred embodiment, entrance side, steady flow segment, experimental section and the expansion of accelerating sections
The outlet side bore of pressure section is followed successively by 800mm, 400mm, 400mm and 600mm；Thus further such that the present invention easily facilitates takes
Band realizes the calibrating on the spot of anywhere anemobiagraph.
Wind speed detection device includes at least one Pitot tube；Pitot tube is set to experimental section；One end connection of Pitot tube is useful
The pressure test device of pressure difference in detection wind tunnel simulation device, in verification process, Pitot tube passes through the wind speed in wind-tunnel
The form of pressure difference is reflected to pressure test device；Wind speed detection device should include also processing unit, for receiving all data
Final process obtains standard wind speed value.In the present embodiment, wind speed detection device further includes that 2 groups of temperature sensors and 2 groups of humidity pass
Sensor；2 groups of temperature sensors are located at the entrance side of accelerating sections and the outlet side of diffuser；2 groups of humidity sensors distinguish position
In the entrance side of accelerating sections and the outlet side of diffuser；Thus it is passed in final calculation of wind speed value by temperature sensor and humidity
The temperature and humidity data of sensor acquisition are modified Pitot tube and the air speed value that pressure test device measures, and obtain more quasi-
True standard wind speed value, guarantees final verification result accurate and effective.
The present embodiment also provides a kind of working method of above-mentioned portable airspeedometer verification system, comprising the following steps:
S1. airspeedometer to be measured is placed in experimental section, opens blower；Wherein airspeedometer to be measured should be at and Pitot tube
Thus the same section of experimental section avoids verification result caused by position difference inaccurate.
S2. after air-flow after experimental section, the difference that pressure test device detects Pitot tube dynamic pressure and static pressure is obtained in real time,
And the calibrating air speed value that Anemometer to be measured arrives is obtained in real time；
S3. the standard wind speed value at current Pitot tube is calculated according to the difference of Pitot tube dynamic pressure and static pressure, then by standard wind
Fast value is compared to obtain difference with calibrating air speed value；
In the present embodiment, in step S3, when calculating the standard wind speed value at current Pitot tube, formula is as follows:
Wherein, v is standard wind speed value, and K is the instrument coefficient of pressure test device, Δ P be Pitot tube dynamic pressure and static pressure it
Difference, ρ are the fluid density of air-flow；The special discrete correction algorithm designed for small-sized wind tunnel of above-mentioned formula, overcomes Miniature wind
Hole because block it is bigger caused by velocity flow profile distort phenomena such as caused by measuring wind speed deviation.
S4. judge difference whether in threshold range, then airspeedometer assay approval to be measured in this way, such as otherwise airspeedometer to be measured
It examines and determine unqualified.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (9)
1. a kind of portable airspeedometer verification system, it is characterised in that: including wind tunnel simulation device and wind speed detection device；It is described
Wind tunnel simulation device include blower, further include the accelerating sections being sequentially communicated, steady flow segment, experimental section and diffuser；Described adds
The entrance side of fast Duan Weiyu steady flow segment connection is connected to the air outlet of blower；
The wind speed detection device includes at least one Pitot tube；The Pitot tube is set to experimental section；The Pitot tube
One end be connected with the pressure test device for detecting pressure difference in wind tunnel simulation device.
2. a kind of portable airspeedometer verification system according to claim 1, it is characterised in that: the wind speed measurement dress
Set further includes 2 groups of temperature sensors and 2 groups of humidity sensors；2 groups of temperature sensors are located at entrance side and the expansion of accelerating sections
Press the outlet side of section；2 groups of humidity sensors are located at the entrance side of accelerating sections and the outlet side of diffuser.
3. a kind of portable airspeedometer verification system according to claim 1, it is characterised in that: set in the accelerating sections
It is equipped with the anti-separation net for being rectified to the air-flow for entering accelerating sections.
4. a kind of portable airspeedometer verification system according to claim 3, it is characterised in that: the accelerating sections and steady
The junction of stream section is provided with for lead direct join for the large eddies in air-flow point to the air-flow entered in the middle part of steady flow segment
It is segmented into the honeycomb of small whirlpool.
5. a kind of portable airspeedometer verification system according to claim 4, it is characterised in that: the steady flow segment setting
There is the damping screen for eliminating the small whirlpool in the air-flow for passing through honeycomb.
6. a kind of portable airspeedometer verification system according to claim 5, it is characterised in that: the accelerating sections, steady
The length ratio for flowing section, experimental section and diffuser is 2:1:3:1.
7. a kind of portable airspeedometer verification system according to claim 6, it is characterised in that: the accelerating sections enters
Mouthful side, steady flow segment, experimental section and diffuser outlet side relative aperture be 4:2:2:3.
8. a kind of working method of portable airspeedometer verification system as claimed in claim 1 to 7, it is characterised in that: including
Following steps:
S1. airspeedometer to be measured is placed in experimental section, opens blower；
S2. after air-flow after experimental section, the difference that pressure test device detects Pitot tube dynamic pressure and static pressure is obtained in real time, and real
When obtain the calibrating air speed value that Anemometer to be measured arrives；
S3. the standard wind speed value at current Pitot tube is calculated according to the difference of Pitot tube dynamic pressure and static pressure, then by standard wind speed value
It is compared to obtain difference with calibrating air speed value；
S4. judge difference whether in threshold range, then airspeedometer assay approval to be measured, such as otherwise airspeedometer calibrating to be measured in this way
It is unqualified.
9. a kind of working method of portable airspeedometer verification system according to claim 8, it is characterised in that: described
In step S3, when calculating the standard wind speed value at current Pitot tube, formula is as follows:
Wherein, v is standard wind speed value, and K is the instrument coefficient of pressure test device, and Δ P is the difference of Pitot tube dynamic pressure and static pressure, ρ
For the fluid density of air-flow.
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| CN113125799A (en) * | 2021-04-19 | 2021-07-16 | 重庆地格科技有限责任公司 | Intelligent anemorumbometer based on pitot tube |
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| CN115290287A (en) * | 2022-10-08 | 2022-11-04 | 中国空气动力研究与发展中心低速空气动力研究所 | High-altitude low-density wind tunnel test system and method and wind speed measurement method |
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