CN103018478B - Thermal wind speed sensing device capable of performing zero compensation automatically and method for measuring wind speeds - Google Patents
Thermal wind speed sensing device capable of performing zero compensation automatically and method for measuring wind speeds Download PDFInfo
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- CN103018478B CN103018478B CN201210506706.6A CN201210506706A CN103018478B CN 103018478 B CN103018478 B CN 103018478B CN 201210506706 A CN201210506706 A CN 201210506706A CN 103018478 B CN103018478 B CN 103018478B
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Abstract
The invention discloses a thermal wind speed sensing device capable of performing zero compensation automatically. The device comprises an upper sensor chip, a lower sensor chip, a top casing, a bottom casing, support column bodies, a lower support platform and an upper support platform. The upper sensor chip is embedded at the bottom of the upper support platform, and the lower sensor chip is embedded at the top of the lower support platform; and the upper sensor chip is a wind speed sensor chip in a constant-temperature-difference mode, and the lower sensor chip is a wind speed sensor chip in a constant-power mode. A method for measuring wind speeds through the thermal wind speed sensing device comprises placing a thermal wind speed sensing device at a place of a wind speed to be tested; performing measurement, wherein the upper sensor chip works in a constant temperature difference working mode, the lower sensor chip works in a constant temperature working mode, and a single-chip microcomputer system measures and calculates wind speeds; and performing next measurement. The thermal wind speed sensing device can perform zero compensation automatically when used for measuring the wind speeds and has the advantages of being accurate in measurement and wide in wind speed measurement range.
Description
Technical field
The present invention relates to a kind of hot blast speed sensing device, specifically, relate to a kind of hot blast speed sensing device that can automatic zero point compensation, meanwhile, also relate to the method for utilizing this hot blast speed sensing device measuring wind.
Background technology
Wind speed, wind direction are the very important parameters of reaction weather condition, and the production of environmental monitoring, artificial atmosphere and industrial or agricultural is had to material impact, and therefore quick and precisely measuring wind speed and direction has important practical significance.As everyone knows, the temperature at zero point of the typical heat air velocity transducer problem of floating is to hinder a large difficulty of hot wind gage degree of accuracy and sensitivity raising always.Because the temperature of environment and sensor temperature are constantly to change, make always to occur zero point drift in various degree, this sensitivity for wind gage and degree of accuracy are all very large puzzlements.What the present invention adopted is the test structure with dual chip, in hot Anemometer amount mode, it is serious that but constant difference pattern (CTD) range temperature large under low wind speed is floated problem, and permanent power modes of operation (CP) has high sensitivity, temperature is floated feature little but that range is not high.How not only guaranteeing measuring accuracy but also having wide-measuring range is in current hot wind gage research and development, to need the problem that solves.
Summary of the invention
Technical matters: technical matters to be solved by this invention is: proposed a kind of can automatic zero point the hot blast speed sensing device of compensation and the method for measuring wind, utilize this hot blast speed sensing device measuring wind, can compensate by automatic zero point, have and measure the premium properties accurate, measuring wind speed scope is wide.
Technical scheme: for solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of can automatic zero point the hot blast speed sensing device of compensation, this sensing device comprises upper sensor chip, lower sensor chip, top shell, drain pan, support cylinder, lower saddle and upper saddle, support cylinder is connected between top shell and drain pan, and form space between adjacent supports cylinder, upper saddle is connected to the bottom surface of top shell, and upper sensor chip is embedded to the bottom at upper saddle, lower saddle is connected to the end face of drain pan, and lower sensor chip is embedded to the top at lower saddle; Upper sensor chip is constant difference pattern air velocity transducer chip, and lower sensor chip is permanent power mode air velocity transducer chip.
Can automatic zero point the method for hot blast speed sensing device measuring wind of compensation, the method comprises the following steps:
The first step: hot blast speed sensing device is placed on to tested wind speed place;
Second step: measure: upper sensor chip is operated in constant difference mode of operation by constant difference control circuit, lower sensor chip is operated in permanent power modes of operation by constant-power control circuit, upper sensor chip and lower sensor chip are worked simultaneously, the temperature signal that both produce converts electric signal to by temperature sensor, through amplifying, by Single Chip Microcomputer (SCM) system, carry out wind speed measuring and calculating again;
The 3rd step: carry out next time and measure: after second step completes, after residence time b, return to second step, carry out next time and measure; Otherwise measure, finish.
Further, in described second step, the process of wind speed measuring and calculating is: when the wind speed of measuring at lower sensor chip is less than or equal to a, utilize lower sensor chip to carry out the measurement of wind speed size and Orientation, be provided for upper sensor chip the zero point of a standard simultaneously, and the thermometric correction factor R to upper sensor chip
tadjust; When the wind speed of measuring at lower sensor chip is greater than a, utilize upper sensor chip to carry out the measurement of wind speed, obtain air speed value V
cTD, the thermometric correction factor R obtaining by the last time
tthis air speed value is revised, obtained actual air speed value V
actual, V
actual=R
tv
cTD, utilize lower sensor chip to carry out the test of wind direction.
Beneficial effect: compared with prior art, technical scheme of the present invention has advantages of that measurement is accurate, measuring wind speed scope is wide.In the prior art, the hot wind gage under constant difference pattern has advantages of wide range, but zero point drift is very serious, and measuring wind speed is inaccurate; On the contrary, the air velocity transducer under permanent power mode has zero point drift less under low wind speed and high sensitivity feature, but range is large not.Hot blast speed sensing device, the upper sensor chip that has comprised constant difference mode of operation and the lower sensor chip of permanent power modes of operation of the present invention.Under low wind speed, the sensor chip of two kinds of mode of operations is worked simultaneously, but only utilize the permanent power mode of lower sensor chip to carry out the test of wind speed size and Orientation, be provided for constant difference mode of operation the zero point of a standard simultaneously, and the thermometric correction factor of constant difference pattern is constantly adjusted; Under high wind speed, adopt the upper sensor chip of constant difference pattern carry out the test of wind speed and obtain approaching actual air speed value by correction factor, utilize permanent power mode to carry out the test of wind direction.Thus, not only guarantee measuring accuracy but also have advantages of that the measurement range of wind speed is wide.
Accompanying drawing explanation
Fig. 1 is front elevation of the present invention.
Fig. 2 is the vertical view of removing in device of the present invention after top shell, upper sensor chip and upper saddle.
Fig. 3 is the FB(flow block) of measuring wind method of the present invention.
In figure, have: upper sensor chip 1, lower sensor chip 2, top shell 3, drain pan 4, support cylinder 5, lower saddle 6, upper saddle 7.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail.
As depicted in figs. 1 and 2, of the present invention a kind of can automatic zero point the hot blast speed sensing device of compensation, comprise
Upper sensor chip 1, lower sensor chip 2, top shell 3, drain pan 4, support cylinder 5, lower saddle 6 and upper saddle 7.Support cylinder 5 is connected between top shell 3 and drain pan 4, and forms space between adjacent supports cylinder 5.The extraneous wind just space between support cylinder 5 enters hot blast speed sensing device.Upper saddle 7 is connected to the bottom surface of top shell 3, and upper sensor chip 1 is embedded to the bottom at upper saddle 7.Lower saddle 6 is connected to the end face of drain pan 4, and lower sensor chip 2 is embedded to the top at lower saddle 6.Upper sensor chip 1 is constant difference pattern air velocity transducer chip.Lower sensor chip 2 is permanent power mode air velocity transducer chip.
For improving the accuracy of measuring, the bottom surface of described upper sensor chip 1 and the bottom surface of upper saddle 7 are positioned at same level; The end face of the end face of lower sensor chip 2 and lower saddle 6 is positioned at same level.Upper sensor chip 1 is relative with lower sensor chip 2.
While making above-mentioned hot blast speed sensing device, lower saddle 6 and upper saddle 7 can all adopt aluminum alloy material to make.Top shell 3, drain pan 4 and support cylinder 5 can adopt plastic material to make.Adopt epoxide-resin glue lower saddle 6 and upper saddle 7 to be sticked on respectively to the central authorities of top shell 3 and drain pan 4.Support cylinder 5 and top shell 3 are integrated.On drain pan 4, be provided with the embedding aperture corresponding with support cylinder 5, support cylinder 5 and drain pan 4 link together by embedded hole.Preferably four of support cylinders 5, are evenly arranged between drain pan 4 and top shell 3.
As shown in Figure 3, utilize the method for above-mentioned hot blast speed sensing device measuring wind that can automatic zero point compensation, comprise the following steps:
The first step: equipment connection: hot blast speed sensing device is placed on to tested wind speed place.
Second step: measure: upper sensor chip 1 is operated in constant difference mode of operation by constant difference control circuit, lower sensor chip 2 is operated in permanent power modes of operation by constant-power control circuit, upper sensor chip 1 and lower sensor chip 2 are worked simultaneously, the temperature signal that both produce converts electric signal to by temperature sensor, through amplifying, by Single Chip Microcomputer (SCM) system, carry out wind speed measuring and calculating again.
In second step, the process of wind speed measuring and calculating is: when the wind speed of measuring at lower sensor chip 2 is less than or equal to a, utilize lower sensor chip 2 to carry out the measurement of wind speed size and Orientation, be provided for upper sensor chip 1 zero point of a standard simultaneously, and the thermometric correction factor R to upper sensor chip 1
tadjust; When the wind speed of measuring at lower sensor chip 2 is greater than a, utilize upper sensor chip 1 to carry out the measurement of wind speed, obtain air speed value V
cTD, the thermometric correction factor R obtaining by the last time
tthis air speed value is revised, obtained actual air speed value V
actual, V
actual=R
tv
cTD, utilize lower sensor chip 2 to carry out the test of wind direction.Wherein, the span of a is 6-15m/s.
The 3rd step: carry out next time and measure: after second step completes, after residence time b, return to second step, carry out next time and measure; Otherwise measure, finish.
In the 3rd step: the span of b 0.1-5 seconds.
Above-mentioned hot blast speed sensing device that can automatic zero point compensation, is integrated in the hot wind gage under the hot wind gage of constant difference pattern and permanent power mode in same wind speed and direction sensing device.This device comprises two and measures chips, i.e. upper sensor chip 1 and lower sensor chip 2, and each chip operation is in different mode of operations.In low wind speed (being that wind speed is less than or equal to a, such as being less than 10m/s) situation, adopt two kinds of sensing chips to work simultaneously, but only get the output wind speed and direction of the lower sensor chip 2 of permanent power mode work.In high wind speed (being that wind speed is greater than a, such as being greater than 10m/s) situation, adopt upper sensor chip 1 measuring wind of constant difference pattern, with the lower sensor chip 2 of permanent power mode, measure wind direction.During low wind speed, the lower sensor chip 2 of permanent power mode has minimum temperature drift, the output of therefore calibrating the upper sensor chip 1 of constant difference patterns with 2 outputs of lower sensor chip, can obtain any thermometric correction factor constantly of measuring, this thermometric correction factor has reflected this measurement temperature impact constantly.In other words, this thermometric correction factor is to measure the function of temperature constantly.When ambient wind velocity forwards high wind speed to from low wind speed, can think this moment environment temperature and the temperature while last time measuring substantially constant (because measure interval for twice in several seconds, and the temperature variation of actual measurement environment be one gradual).Therefore, adopt above-mentioned measurement scheme can realize high-acruracy survey and the temperature correction under low wind speed, under high wind speed, can have very high measurement range, and automatically reduced the impact that temperature is floated.
The present invention proposes have can automatic zero point compensation hot blast speed sensing device, adopt two kinds of hot air velocity transducers of constant difference mode of operation and permanent power modes of operation simultaneously.The impact bringing in order to reduce temperature drift guarantees relatively large journey when guaranteeing transducer sensitivity.This hot blast speed sensing device adopts two sensor chips arranging up and down to test, and utilizes constant difference pattern air velocity transducer chip as upper sensor chip 1, completes the test to high wind speed; Utilize permanent power mode air velocity transducer chip as lower sensor chip 2, complete the test to low wind speed and direction, and provide the numeric reference of a standard for upper sensor chip 1.Key is, ceaselessly revised the zero point of constant difference pattern air velocity transducer chip, and provides reference at zero point for test under high wind speed.Under low wind speed, the wind speed that upper sensor chip 1 records is V
cTD, the wind speed that lower sensor chip 2 records is V
cP, because the air speed value recording under permanent power mode is exact value, under constant difference pattern, measured value can obtain a correction factor R
t.R
twith following formula explanation, under low wind speed:
V
actual=V
cP=R
tv
cTD
That is to say thermometric correction factor R
t: R
t=V
cP/ V
cTD.Thermometric correction factor R
talong with wind speed, changing, is dynamic change value.
Under higher wind velocity condition, the wind speed test result under permanent power mode and actual deviation are larger, adopt the data that record under constant difference pattern, after revising, obtain approaching actual value, and thermometric correction factor is the last thermometric correction factor R obtaining
t, actual wind speed is now:
V
actual=R
tv
cTD(2)
The present invention arrives the sets of advantages of two kinds of sensor chips together, utilize the little advantage of zero point drift of wide range and the permanent power mode sensor of constant difference mode sensor, thereby realized wind speed sensing device, there is automatic zero point compensation simultaneously, meet wide range and highly sensitive requirement simultaneously.
Claims (7)
- One kind can automatic zero point the hot blast speed sensing device of compensation, it is characterized in that, this sensing device comprises upper sensor chip (1), lower sensor chip (2), top shell (3), drain pan (4), support cylinder (5), lower saddle (6) and upper saddle (7), support cylinder (5) is connected between top shell (3) and drain pan (4), and adjacent supports cylinder forms space between (5), upper saddle (7) is connected to the bottom surface of top shell (3), and upper sensor chip (1) is embedded to the bottom in upper saddle (7), lower saddle (6) is connected to the end face of drain pan (4), and lower sensor chip (2) is embedded to the top in lower saddle (6), upper sensor chip (1) is constant difference pattern air velocity transducer chip, and lower sensor chip (2) is permanent power mode air velocity transducer chip, under low wind speed, utilize the permanent power mode of lower sensor chip (2) to carry out the test of wind speed size and Orientation, be provided for constant difference mode of operation the zero point of a standard simultaneously, and the thermometric correction factor of constant difference pattern is constantly adjusted, under high wind speed, adopt the upper sensor chip (1) of constant difference pattern carry out the test of wind speed and obtain approaching actual air speed value by correction factor, utilize the lower sensor chip (2) of permanent power mode to carry out the test of wind direction.
- According to claimed in claim 1 can automatic zero point the hot blast speed sensing device of compensation, it is characterized in that, the bottom surface of described upper sensor chip (1) and the bottom surface of upper saddle (7) are positioned at same level; The end face of described lower sensor chip (2) and the end face of lower saddle (6) are positioned at same level.
- According to claimed in claim 1 can automatic zero point the hot blast speed sensing device of compensation, it is characterized in that, described upper sensor chip (1) is relative with lower sensor chip (2).
- 4. utilize described in claim 1 can automatic zero point compensation the method for hot blast speed sensing device measuring wind, it is characterized in that, the method comprises the following steps:The first step: hot blast speed sensing device is placed on to tested wind speed place;Second step: measure: upper sensor chip (1) is operated in constant difference mode of operation by constant difference control circuit, lower sensor chip (2) is operated in permanent power modes of operation by constant-power control circuit, upper sensor chip (1) and lower sensor chip (2) are worked simultaneously, the temperature signal that both produce converts electric signal to by temperature sensor, through amplifying, by Single Chip Microcomputer (SCM) system, carry out wind speed measuring and calculating again;The 3rd step: carry out next time and measure: after second step completes, after residence time b, return to second step, carry out next time and measure; Otherwise measure, finish.
- According to claimed in claim 4 can automatic zero point the method for hot blast speed sensing device measuring wind of compensation, it is characterized in that, in described second step, the process of wind speed measuring and calculating is: when the wind speed of measuring at lower sensor chip (2) is less than or equal to a, utilize lower sensor chip (2) to carry out the measurement of wind speed size and Orientation, be provided for upper sensor chip (1) zero point of a standard simultaneously, and the thermometric correction factor R to upper sensor chip (1) tadjust; When the wind speed of measuring at lower sensor chip (2) is greater than a, utilize upper sensor chip (1) to carry out the measurement of wind speed, obtain air speed value V cTD, the thermometric correction factor R obtaining by the last time tthis air speed value is revised, obtained actual air speed value V actual, V actual=R tv cTD, utilize lower sensor chip (2) to carry out the test of wind direction.
- According to claimed in claim 5 can automatic zero point the method for hot blast speed sensing device measuring wind of compensation, it is characterized in that, the span of described a is 6-15m/s.
- According to claimed in claim 4 can automatic zero point the method for hot blast speed sensing device measuring wind of compensation, it is characterized in that the span of described b 0.1-5 seconds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210506706.6A CN103018478B (en) | 2012-12-03 | 2012-12-03 | Thermal wind speed sensing device capable of performing zero compensation automatically and method for measuring wind speeds |
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| CN201210506706.6A CN103018478B (en) | 2012-12-03 | 2012-12-03 | Thermal wind speed sensing device capable of performing zero compensation automatically and method for measuring wind speeds |
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| CN103018478B true CN103018478B (en) | 2014-09-10 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103592467B (en) * | 2013-10-30 | 2016-05-04 | 苏州斯威高科信息技术有限公司 | Two-dimensional ultrasonic anemobiagraph self-tuing on line at zero point device and method |
| CN103913594A (en) * | 2014-04-02 | 2014-07-09 | 太仓华风环保科技有限公司 | Face wind speed probe |
| CN108051610B (en) * | 2017-10-16 | 2022-04-12 | 东南大学 | Intelligent double-detection-mode wind speed and direction sensor and measurement method |
| CN108710003A (en) * | 2018-08-01 | 2018-10-26 | 中科传启（苏州）科技有限公司 | Zero method of calibration equipment and its school for carrying out school zero to ultrasonic wind velocity indicator |
| CN110244077B (en) * | 2019-06-04 | 2021-03-30 | 哈尔滨工程大学 | Constant power adjustment and precision compensation method for thermal type wind speed sensor |
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| CN101349708A (en) * | 2008-07-04 | 2009-01-21 | 东南大学 | Micro-mechanical two-dimension wind speed and wind direction sensor and signal processing circuit thereof |
| CN101782410A (en) * | 2009-01-20 | 2010-07-21 | 复旦大学 | Thermal flow meter of micro electro mechanical system |
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- 2012-12-03 CN CN201210506706.6A patent/CN103018478B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| JPH06249864A (en) * | 1993-02-25 | 1994-09-09 | Murata Mfg Co Ltd | Wind speed sensor |
| US5703288A (en) * | 1995-07-19 | 1997-12-30 | Ricoh Company, Ltd. | Thermally-sensitive type flow meter having a high accuracy |
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