CN103439531A - Wind tunnel detection test device and method for calibrating multiple wind meters automatically - Google Patents
Wind tunnel detection test device and method for calibrating multiple wind meters automatically Download PDFInfo
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Abstract
The invention discloses a wind tunnel detection test device and method for calibrating multiple wind meters automatically. The device comprises a current collector (1), a flow stabilization section (2), a low-wind-speed test section (4), an intermediate-wind-speed test section (5), a high-wind-speed test section (6), a gradually-contracting section (3), a gradually-expanding section (7), observation holes (9) and damping nets (18). A barometric pressure sensor (13) and a temperature and humidity sensor (14) are arranged on the top of the flow stabilization section (2), and the top of the low-wind-speed test section (4), the top of the intermediate-wind-speed test section (5) and the top of the high-wind-speed test section (6) are respectively provided with a wind speed sensor (15) and a differential pressure sensor (16); a PLC control system 20 adjusts and controls the blast capacity of a draught fan 19. The device has the advantages of being stable in wind current, capable of adjusting the blast capacity automatically, easy to operate, capable of calibrating the multiple wind meters at a time, high in measurement accuracy, and the like; besides, the device can record, store and process actual measurement results, and is suitable for automatic calibration on low-speed, intermediate-speed and high-speed wind meters.
Description
Technical field
The present invention relates to a kind of wind tunnel test pick-up unit and method of calibrating the wind table, be suitable for the windy table automatic calibration of basic, normal, high third gear.
Background technology
The measuring and calculating of wind speed is one of substance of mine ventilation department daily management mission, and for measuring the various instrument of wind speed, due to the continuous wearing and tearing in long-term use procedure, get rusty, the reason such as dust stratification all can make the mensuration precision of wind table reduce, so often calibration.At present, mechanical type wind table is widely used in mensuration of Mine Ventilation Resistance, fan performance test, the wind table dispatch from the factory front or use a period of time after, all must be calibrated, and be drawn air-out table calibration curve.Wind table calibration at present need to be by means of wind tunnel model test, calibration process can only wind table of primary calibration, and calibration accuracy is low, can't verify the accuracy of " true wind speed ", artificial reading and constructional error are large, manual shift air quantity difficulty, and a plurality of wind table calibrations that especially differ larger for range are wasted time and energy more.In addition, each mineral bureau of China, relevant scientific research, universities and colleges and meteorological department etc. have all configured calibration wind tunnel all kinds of wind tables have been calibrated.The intrinsic larger trueness error of the compensation micro-pressure meter adopted due to calibration itself, serious vision alignment error, the manually existence of timing error and dial reading error, often cause examining and determine the serious distortion of curve." coal mine machinery " 06 phase in 1998 has been introduced the COMPUTER DETECTION device of a kind of wind table with calibration wind tunnel, it is similar with conventional data Collection & Processing System, survey mould and partly comprise differential pressure sensing and translation circuit, it is converted to the standard ram compression signal in wind-tunnel the DC current signal of 4 ~ 20mA pro rata, follow the conversion through 12 analog to digital converter AD574, finally by computing machine, pass through programmable parallel interface chip IC L8255 exchange message with it, calculate the standard wind speed in wind-tunnel.This wind table also can only wind table of primary calibration in calibration process with the COMPUTER DETECTION device of calibration wind tunnel, wastes time and energy.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of unstable airflow, air quantity automatically regulate, simple to operate, can a plurality of wind tables of primary calibration and the wind-tunnel of the high windy table of automatic calibration of measuring accuracy detect test unit.
In addition, the present invention also provides the wind-tunnel of the windy table of a kind of automatic calibration to detect test method.
For realizing above-mentioned purpose of the present invention, the present invention calibrates the technical scheme that wind tunnel test pick-up unit that the wind table uses adopts and is:
The present invention calibrates the wind tunnel test pick-up unit that the wind table is used, contain current collector, steady flow segment, blower fan, motor, support, motor is placed on motor base, it also contains low-grade wind speed test section, middle-grade wind speed test section, high-grade wind speed test section, between steady flow segment and low-grade wind speed test section, between low-grade wind speed test section and middle-grade wind speed test section, between middle-grade wind speed test section and high-grade wind speed test section, respectively be provided with a converging transition; At current collector and steady flow segment, steady flow segment and along between first converging transition of air intake direction, one deck damping screen respectively is set; Barometric pressure sensor, Temperature Humidity Sensor are installed in steady flow segment top center position, in low-grade wind speed test section, middle-grade wind speed test section, high-grade wind speed test section top center position, air velocity transducer, differential pressure pickup are installed respectively; PLC control system and blower fan, motor and pressure transducer, Temperature Humidity Sensor, air velocity transducer, differential pressure pickup link, for automatically regulating and controlling fan delivery, read related data.At high-grade wind speed test section and blower fan junction, divergent segment is set, air-flow is played to decelerating effect, dynamic pressure can be converted to static energy, reduce energy loss.Offer respectively transparent viewport at low-grade test section, middle-grade wind speed test section, center, high-grade wind speed test section both sides, for manually reading wind meter reading to be calibrated, show wind speed.
The ratio of its two ends size basal area of described converging transition, between 3-5, is preferably 4.
The wind-tunnel of the windy table of automatic calibration of the present invention detects test method:
1) the wind tunnel test pick-up unit that adopts the calibration wind table of above-mentioned special use to use;
2) the PLC control system reads the Shuo Ju ⊿ P of the temperature T of atmospheric pressure P, Temperature Humidity Sensor of barometric pressure sensor and humidity φ, differential pressure pickup automatically;
3) the PLC control system obtains theoretical calculation of wind speed according to P, T, tetra-parameters of φ, ⊿ P, is made as v, and automatically reading the air velocity transducer data is true wind speed, is made as V simultaneously;
4) the PLC control system relatively judges V and v numerical relation, establishes m=(V-v)/V; If m>5%, redeterminate, if m≤5%, getting V is true wind speed, and V preserved in record;
5) manually read wind meter reading to be calibrated by viewport and show wind speed, be made as U, one group (V, U) preserved in record; Continue to regulate fan delivery by the PLC control system, repeat above step, obtain under different operating modes showing in wind table range ability to be calibrated wind speed, true wind speed, many groups (U, V) preserved in record, automatically draws wind table calibration curve.
Compared with prior art, the beneficial effect that the wind-tunnel of the windy table of a kind of automatic calibration of the present invention detects test unit and method is: have that unstable airflow and air quantity are regulated automatically, the measuring accuracy advantages of higher, can provide basic, normal, high shelves different wind speed, and can be recorded measured result, store, process, overcome and needed repeatedly manual adjustments air quantity, artificial reading and draw to waste time and energy and problem that measuring accuracy is low.
The accompanying drawing explanation
The wind-tunnel that Fig. 1 is the windy table of a kind of automatic calibration of the present invention detects the structural representation of test unit;
The wind-tunnel that Fig. 2 is the windy table of a kind of automatic calibration of the present invention detects the principle schematic of test method.
Reference numeral is: the 1-current collector; The 2-steady flow segment; The 3-converging transition; The low-grade wind speed test section of 4-; The middle-grade wind speed test section of 5-; The high-grade wind speed test section of 6-; The 7-divergent segment; The 8-exhaustion section; The 9-viewport; The 10-flange; The 11-support; The 12-motor base; The 13-barometric pressure sensor; The 14-Temperature Humidity Sensor; The 15-air velocity transducer; The 16-differential pressure pickup; The 17-motor; The 18-damping screen; The 19-blower fan; The 20-PLC control system.
Embodiment
For further describing the present invention, wind-tunnel detection test unit and method below in conjunction with drawings and Examples to the windy table of a kind of automatic calibration of the present invention are described in further details.
The structural representation of a kind of windy table automatic calibration wind tunnel experiment device of the present invention as shown in Figure 1 finds out, it consists of jointly current collector 1, steady flow segment 2, converging transition 3, low-grade wind speed test section 4, middle-grade wind speed test section 5, high-grade wind speed test section 6, divergent segment 7, exhaustion section 8, viewport 9, flange 10, support 11, motor base 12, barometric pressure sensor 13, Temperature Humidity Sensor 14, air velocity transducer 15, differential pressure pickup 16, motor 17, damping screen 18, blower fan 19, PLC control system 20; Steady flow segment 2, low-grade wind speed test section 4, middle-grade wind speed test section 5, high-grade wind speed test section 6 are arranged on support 11, and motor 17 is placed on motor base 12.Between steady flow segment 2 and low-grade wind speed test section 4, between low-grade wind speed test section 4 and middle-grade wind speed test section 5, between middle-grade wind speed test section 5 and high-grade wind speed test section 6, respectively be provided with a converging transition 3; At current collector 1 and steady flow segment 2, steady flow segment 2 and along 3 of first converging transitions of air intake direction, one deck damping screen 18 respectively is set, thereby provides the good condition that becomes a mandarin for experiment.2 pairs of air-flows of steady flow segment play stabilization, at steady flow segment 2 tops, barometric pressure sensor 13, Temperature Humidity Sensor 14 are installed, offer respectively organic glass and make transparent viewport 9 at low-grade test section 4, middle-grade wind speed test section 5, high-grade wind speed test section 6 centers, both sides, an air velocity transducer 15 and differential pressure pickup 16 are respectively installed in top; Three reducers are set, and the air-flow that converging transition 3 carrys out air inlet stream accelerates, and makes active section obtain needed speed while testing, and reduces the vertical and horizontal turbulivity of air-flow, and the ratio of its two ends size basal area equals 4; By converging transition 3, the test section that three sections reduce successively is set, is low-grade test section 4, middle-grade wind speed test section 5, high-grade wind speed test section 6; With blower fan 19 junctions, divergent segment 7 is set at high-grade wind speed test section 6, air-flow is played to decelerating effect, dynamic pressure can be converted to static energy, reduce energy loss, final air-flow is discharged through blower fan 19, exhaustion section 8; PLC control system 20 is regulated and the air quantity of controlling blower fan 19, and wind speed under the interior different operating modes of wind table range ability to be calibrated is provided.
The wind-tunnel of the windy table of a kind of automatic calibration of the present invention shown in Figure 2 detects the principle schematic of test method.Principle of work of the present invention: PLC control system 20 reads the Shuo Ju ⊿ P of the temperature T of atmospheric pressure P, Temperature Humidity Sensor 14 of barometric pressure sensor 13 and humidity φ, differential pressure pickup 16 automatically, PLC control system 20 obtains theoretical calculation of wind speed according to P, T, tetra-parameters of φ, ⊿ P, be made as v, automatically read air velocity transducer 15 data is true wind speed simultaneously, be made as V, PLC control system 20 relatively judges V and v numerical relation, establishes m=(V-v)/V.If m>5%, redeterminate, if m≤5%, getting V is true wind speed, and V preserved in record.Manually read wind meter reading to be calibrated by viewport 9 and show wind speed, be made as U, one group (V, U) preserved in record.Continue to regulate blower fan 19 air quantity by PLC control system 20, repeat above step, obtain under different operating modes showing in wind table range ability to be calibrated wind speed, true wind speed, many groups (U, V) preserved in record, automatically draws wind table calibration curve.
Claims (6)
1. the wind-tunnel of the windy table of automatic calibration detects test unit, contain current collector (1), steady flow segment (2), blower fan (19), motor (17), support, motor (17) is placed on motor base (12), it is characterized in that: it also contains low-grade wind speed test section (4), middle-grade wind speed test section (5), high-grade wind speed test section (6), between steady flow segment (2) and low-grade wind speed test section (4), between low-grade wind speed test section (4) and middle-grade wind speed test section (5), respectively be provided with a converging transition (3) between middle-grade wind speed test section (5) and high-grade wind speed test section (6), at current collector (1) and steady flow segment (2), steady flow segment (2) and along between first converging transition (3) of air intake direction, one deck damping screen (18) respectively is set, barometric pressure sensor (13), Temperature Humidity Sensor (14) are installed in steady flow segment (2) top center position, in low-grade wind speed test section (4), middle-grade wind speed test section (5), high-grade wind speed test section (6) top center position, air velocity transducer (15), differential pressure pickup (16) are installed respectively, PLC control system (20) links with blower fan (19), motor (17) and pressure transducer (13), Temperature Humidity Sensor (14), air velocity transducer (15), differential pressure pickup (16), in high-grade wind speed test section (6) and blower fan (19) junction, divergent segment (7) is set, offer respectively transparent viewport (9) at low-grade test section (4), middle-grade wind speed test section (5), high-grade wind speed test section (6) center, both sides.
2. the wind-tunnel of the windy table of a kind of automatic calibration as claimed in claim 1 detects test unit, it is characterized in that: the ratio of its two ends size basal area of described converging transition (3) is between 3-5.
3. the wind-tunnel of the windy table of a kind of automatic calibration as claimed in claim 2 detects test unit, it is characterized in that: the ratio of its two ends size basal area of described converging transition (3) equals 4.
4. the wind-tunnel of the windy table of automatic calibration detects test method, it is characterized in that:
1) Special testing device adopted is: contain current collector (1), steady flow segment (2), blower fan (19), motor (17), support, motor (17) is placed on motor base (12), it also contains low-grade wind speed test section (4), middle-grade wind speed test section (5), high-grade wind speed test section (6), between steady flow segment (2) and low-grade wind speed test section (4), between low-grade wind speed test section (4) and middle-grade wind speed test section (5), between middle-grade wind speed test section (5) and high-grade wind speed test section (6), respectively be provided with a converging transition (3); At current collector (1) and steady flow segment (2), steady flow segment (2) and along between first converging transition (3) of air intake direction, one deck damping screen (18) respectively is set; Barometric pressure sensor (13), Temperature Humidity Sensor (14) are installed in steady flow segment (2) top center position, in low-grade wind speed test section (4), middle-grade wind speed test section (5), high-grade wind speed test section (6) top center position, air velocity transducer (15), differential pressure pickup (16) are installed respectively; PLC control system (20) links with blower fan (19), motor (17) and pressure transducer (13), Temperature Humidity Sensor (14), air velocity transducer (15), differential pressure pickup (16), in high-grade wind speed test section (6) and blower fan (19) junction, divergent segment (7) is set; Offer respectively transparent viewport (9) at low-grade test section (4), middle-grade wind speed test section (5), high-grade wind speed test section (6) center, both sides.
2) PLC control system (20) reads the Shuo Ju ⊿ P of the temperature T of atmospheric pressure P, Temperature Humidity Sensor (14) of barometric pressure sensor (13) and humidity φ, differential pressure pickup (16) automatically;
3) PLC control system (20) obtains theoretical calculation of wind speed according to P, T, tetra-parameters of φ, ⊿ P, is made as v, and automatically reading air velocity transducer (15) data is true wind speed, is made as V simultaneously;
4) PLC control system (20) relatively judges V and v numerical relation, establishes m=(V-v)/V; If m>5%, redeterminate, if m≤5%, getting V is true wind speed, and V preserved in record;
5) manually read wind meter reading to be calibrated by viewport (9) and show wind speed, be made as U, one group (V, U) preserved in record; Continue to regulate blower fan (19) air quantity by PLC control system (20), repeat above step, obtain under different operating modes showing in wind table range ability to be calibrated wind speed, true wind speed, many groups (U, V) preserved in record, automatically draws wind table calibration curve.
5. the wind-tunnel of the windy table of a kind of automatic calibration as claimed in claim 4 detects test method, it is characterized in that: the ratio of its two ends size basal area of described converging transition (3) is between 3-5.
6. the wind-tunnel of the windy table of a kind of automatic calibration as claimed in claim 5 detects test method, it is characterized in that: the ratio of its two ends size basal area of described converging transition (3) equals 4.
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| CN104391135A (en) * | 2014-11-21 | 2015-03-04 | 上海市计量测试技术研究院 | Calibration device and calibration method for micro wind speed based on laser doppler |
| CN104950083A (en) * | 2015-06-28 | 2015-09-30 | 哈尔滨东方报警设备开发有限公司 | Simple gas detector calibration nozzle |
| CN104991085A (en) * | 2015-07-31 | 2015-10-21 | 南京信息工程大学 | Wind speed sensor start-up wind speed on-site calibration apparatus and start-up wind speed acquisition method |
| CN106768812A (en) * | 2016-11-22 | 2017-05-31 | 朱兰英 | Flow parameter adjusting method and device based on wind-tunnel |
| CN107014444A (en) * | 2017-05-27 | 2017-08-04 | 山东罗泰风机有限公司 | A kind of blower fan dynamic performance parameter measuring system |
| CN107576474A (en) * | 2017-08-28 | 2018-01-12 | 珠海格力电器股份有限公司 | Auxiliary structure for measuring wind resistance coefficient and wind resistance coefficient measuring equipment |
| CN107796591A (en) * | 2017-09-08 | 2018-03-13 | 国网山东省电力公司电力科学研究院 | A kind of wind resistance laboratory and experimental method for small-sized gyroplane |
| CN108051338A (en) * | 2018-01-08 | 2018-05-18 | 佛山市顺德区阿波罗环保器材有限公司 | A kind of resistance testing and analysis system of air filter |
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| CN110095636A (en) * | 2019-05-27 | 2019-08-06 | 山东省气象局大气探测技术保障中心 | A kind of meteorological circuit wind tunnel system |
| CN110927408A (en) * | 2019-12-30 | 2020-03-27 | 上海南华机电有限公司 | Anemograph adjusting device and method and electronic equipment |
| CN112729750A (en) * | 2020-12-22 | 2021-04-30 | 中国空气动力研究与发展中心超高速空气动力研究所 | Three-branch series hypersonic wind tunnel overall structure |
| CN113063966A (en) * | 2021-03-23 | 2021-07-02 | 杭州佐格通信设备有限公司 | Correction device, correction method and measurement method |
| CN113721040A (en) * | 2021-11-03 | 2021-11-30 | 菏泽天顺新能源设备有限公司 | Device for calibrating micro anemometer by using laser measurement and use method |
| CN116067607A (en) * | 2023-03-14 | 2023-05-05 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Flat plate automatic calibration system for wind tunnel |
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| CN104991085A (en) * | 2015-07-31 | 2015-10-21 | 南京信息工程大学 | Wind speed sensor start-up wind speed on-site calibration apparatus and start-up wind speed acquisition method |
| CN106768812A (en) * | 2016-11-22 | 2017-05-31 | 朱兰英 | Flow parameter adjusting method and device based on wind-tunnel |
| CN107014444B (en) * | 2017-05-27 | 2023-08-29 | 山东罗泰风机有限公司 | Fan dynamic performance parameter measurement system |
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| CN110927408A (en) * | 2019-12-30 | 2020-03-27 | 上海南华机电有限公司 | Anemograph adjusting device and method and electronic equipment |
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| CN113063966A (en) * | 2021-03-23 | 2021-07-02 | 杭州佐格通信设备有限公司 | Correction device, correction method and measurement method |
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| CN116067607A (en) * | 2023-03-14 | 2023-05-05 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Flat plate automatic calibration system for wind tunnel |
| CN116067607B (en) * | 2023-03-14 | 2023-06-20 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Flat plate automatic calibration system for wind tunnel |
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