CN104977430A - Virtual test apparatus for thermal wind speed sensor in absence of wind tunnel - Google Patents
Virtual test apparatus for thermal wind speed sensor in absence of wind tunnel Download PDFInfo
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- CN104977430A CN104977430A CN201510346482.0A CN201510346482A CN104977430A CN 104977430 A CN104977430 A CN 104977430A CN 201510346482 A CN201510346482 A CN 201510346482A CN 104977430 A CN104977430 A CN 104977430A
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- wind speed
- air velocity
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- velocity transducer
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Abstract
The invention discloses a virtual test apparatus for a thermal wind speed sensor in absence of a wind tunnel. Thermal probes for precise temperature control are adopted to apply temperature difference signals directly to the surface of a sensor, thereby simulating the influence of actual wind speed. The apparatus can conveniently collect, analyze, process, display and store a lot of test data of a thermal wind speed sensor, thus providing a basis for automatic test and calibration of the thermal wind speed sensor. The advantage and technical effects of the apparatus are that: computer software and hardware resources and apparatus hardware are combined as a whole body, the great calculating processing capability of a computer and the measuring and control capability of the apparatus hardware are combined to be a system, parameter setting and data collection of test software are simple and feasible, and analysis and processing functions are flexible, so the test efficiency for the thermal wind speed sensor is greatly improved, and the test cost is reduced.
Description
Technical field
The present invention relates to a kind of without wind-tunnel virtual thermal air velocity transducer proving installation, belong to sensor performance measuring technology.
Background technology
At present, the dependence of people to weather information penetrates into each corner of daily life, production, the fields such as motion out of doors, field exploration, underground work, Freeway Conditions information monitoring all need in time, accurately, and to obtain the weather information among a small circle easily.In the many weather informations affecting human lives, wind very important one beyond doubt.Because the unevenness of wind speed is very common, just may there is larger wind speed difference in two places, areal hundreds of rice of being separated by.In order to detect wind speed more accurately, traditional is expensive, traditional wind gage that volume is larger cannot meet such demand, and it is little to have volume based on the hot wind speed wind direction sensor of MEMS technology, highly sensitive, the series of advantages such as price is low, particularly the construction of extensive sensing net node and portable is suitable for, the automatic meteorological of low cost detects the exploitation of micro-system, but under present case, Performance Detection and the demarcation of the hot wind speed wind direction sensor of MEMS need the output of testing sensor under different wind speed and direction, and the performance of sensor under different operating environment (as under different temperatures humidity condition).Traditional test mode is carried out in the controlled wind-tunnel of environment, and whole process duration is long, and energy consumption is very high, and needs the environment temperature residing for setting sensor, and needs at set intervals to record the current parameter value of sensor.In traditional sensor detecting system, these operations all manually complete, and efficiency comparison is low, and along with tested number of sensors increases, artificial wind tunnel testing system cannot meet growing workload demands and low energy consumption environmental requirement.
Virtual instrument the instrument hardware that computer hardware resource and user define oneself is organically combined by software program, thus the measurement of computing ability powerful for computing machine and instrument hardware and control ability are combined become a test macro, effectively can reduce cost and the volume of instrument hardware, and by software simulating to the display of data, storage and analyzing and processing.Test macro based on virtual instrument technique has low cost, flexible function, builds the advantages such as easy, therefore Application of Virtual can be realized in the test macro of hot air velocity transducer testing without wind-tunnel low energy consumption in enormous quantities hot air velocity transducer.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of without wind-tunnel virtual thermal air velocity transducer proving installation, improves the testing efficiency of MEMS air velocity transducer, realize the performance automatic test to sensor in enormous quantities and demarcation.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of without wind-tunnel virtual thermal air velocity transducer proving installation, comprise measurement and control center, precise temperature control mechanism, paired thermal probe, alignment stage, DC probe, signal conditioning circuit and data collecting card, alignment stage is provided with Cheng Pian mechanism, Cheng Pian mechanism, for placing hot blast sensor/wafer, regulates hot blast sensor/wafer to move left and right or rotate by alignment stage; Measurement and control center inside is provided with environmental model, and environmental model is hot temperature difference and wind speed and direction, the relation between environment temperature and ambient humidity of hot blast speed sensor surface in actual environment; Environmentally model, export hot temperature difference signal corresponding to wind speed to be measured to precise temperature control mechanism, it is poor that the paired thermal probe of precise temperature control mechanism controls sets up at hot blast speed sensor surface the hot temperature that wind speed to be measured produces, the output signal of hot air velocity transducer feeds back to measurement and control center by DC probe, signal conditioning circuit and data collecting card, realizes the test of hot air velocity transducer, demarcation and calibration.
Can place the hot air velocity transducer of more than one same model in alignment stage, measurement and control center to the hot temperature difference signal that all hot air velocity transducers provide identical wind speed to be measured corresponding, tests while realizing multiple hot blast sensor simultaneously simultaneously.
The software systems of measurement and control center can adopt patterned programming language LabVIEW to write, and it provide the functions such as the automatic control of proving installation, data acquisition, storage, analysis, display and output.In test process, first by the software systems in measurement and control center, the physical environment such as wind speed and direction, humiture parameter is converted to corresponding hot temperature difference signal through environmental model; After this hot temperature difference signal sends precise temperature control mechanism to, be loaded on hot air velocity transducer by paired thermal probe, to simulate the environment of wind-tunnel to hot air velocity transducer.Hot air velocity transducer exports the electric signal varied in size under the effect of different hot temperature difference signal, this electric signal is transferred to signal conditioning circuit by DC probe, signal conditioning circuit carries out the process such as pre-filtering, isolation/amplification, again filtering to input signal, and be converted into the voltage or current value that data collecting card can accept, complete the conversion of simulating signal to digital signal, and digital signal is fed back to measurement and control center.Measurement and control center carries out treatment and analysis to feedback signal, finally obtains to the value of measurand relevant information by the voltage/current signals recorded or provides its corresponding state.
Beneficial effect: provided by the invention without wind-tunnel virtual thermal air velocity transducer proving installation, relative to prior art, there is following advantage: 1, hardware device is programmed with software test and combined, hardware unit is installed simple, the configuration of parameter can be carried out by software program, thus eliminate that manual configuration brings loaded down with trivial details; 2, use the environment numerical model based on experimental data to realize in enormous quantities without wind tunnel test to sensor, reduce and test energy consumption and testing cost, improve testing efficiency; 3, utilize computing machine data at a high speed to calculate and data-handling capacity, travelling speed and the reliability of test macro can be improved greatly; 4, whole system both can realize the independent demarcation of the sensor encapsulated, and the sheet that also can realize wafer scale sensor in enormous quantities is calibrated.
Accompanying drawing explanation
Fig. 1 is the structural representation of hardware components of the present invention;
Fig. 2 is the implementing procedure figure of software section of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Be illustrated in figure 1 a kind of without wind-tunnel virtual thermal air velocity transducer proving installation, comprise measurement and control center 1, precise temperature control mechanism 2, paired thermal probe 3, alignment stage 4, DC probe 5, signal conditioning circuit 6 and data collecting card 7, alignment stage 4 is provided with Cheng Pian mechanism, Cheng Pian mechanism, for placing hot blast sensor 8, regulates hot blast sensor 8 to move left and right or rotate by alignment stage 4; Measurement and control center 1 inside is provided with environmental model, and environmental model is hot temperature difference and wind speed and direction, the relation between environment temperature and ambient humidity on hot air velocity transducer 8 surface in actual environment; Environmentally model, export hot temperature difference signal corresponding to wind speed to be measured to precise temperature control mechanism 2, precise temperature control mechanism 2 be controlled to right thermal probe 3 set up on hot air velocity transducer 8 surface wind speed to be measured produce hot temperature poor, the output signal of hot air velocity transducer 8 feeds back to measurement and control center 1 by DC probe 5, signal conditioning circuit 6 and data collecting card 7, realizes the test of hot air velocity transducer 8, demarcation and calibration.
Place the hot air velocity transducer 8 of more than one same model in alignment stage 4, measurement and control center 1 to the hot temperature difference signal that all hot air velocity transducers 8 provide identical wind speed to be measured corresponding, tests while realizing multiple hot blast sensor 8 simultaneously simultaneously.
This case as follows without wind-tunnel virtual thermal air velocity transducer proving installation build process:
First adopt the micropositioner of standard to build Cheng Pian mechanism in alignment stage 4, this Cheng Pian mechanism is fixed on a base, hot air velocity transducer 8 can be regulated to move left and right or rotate by Cheng Pian mechanism; Then above hot blast sensor 8, precise temperature control mechanism 2 is fixed by down-feed screw, the bottom of precise temperature control mechanism 2 is provided with the thermal probe 3 corresponding with temperature element on hot air velocity transducer 8 and DC probe 5, precise temperature control mechanism 2 can be vertical slightly mobile on down-feed screw by adjusting knob, is convenient to pressing down or promoting of thermal probe 3 and DC probe 5.
The graphics environment that measurement and control center 1 utilizes PC powerful sets up patterned Virtual Instrument, completes the control to instrument, data analysis and display; Signal conditioning circuit 6 and data collecting card 7 can be arranged in a module, and PC is placed nearby.
The testing software of measurement and control center adopts LabVIEW (patterned programmed environment) software development, and the working contents of testing software comprises and precise temperature control mechanism 2 and the communication of data collecting card 7, the analysis of test data and display.The operational scheme of testing software is as shown in Figure 2: first testing software completes the initialization of whole proving installation, initialization procedure is divided into two parts: Part I reads the hot temperature difference signal data model relevant with the environmental parameter such as wind speed and direction, humiture, namely sets up environmental model; Part II is the parameter such as sample frequency, sampling number, sampling channel of setting data capture card 7.After initialization completes, user can by environmental parameters such as the wind speed of the required test of visualization interface input, wind direction and temperature.The state modulator multichannel precision current/voltage source inputted according to user is exported heating voltage or the current signal of different size by testing software.Meanwhile, testing software control data capture card 7 gather amplify through signal conditioning circuit 6, filtered sensor output signal.Testing software can need to select by received signal with the form such as oscillography window, dial plate instruction output intuitively according to user, or important data is delivered to database purchase; The test data stored can be used for the performance to analyte sensors and the calibration for sensor or demarcation.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. one kind without wind-tunnel virtual thermal air velocity transducer proving installation, it is characterized in that: comprise measurement and control center (1), precise temperature control mechanism (2), paired thermal probe (3), alignment stage (4), DC probe (5), signal conditioning circuit (6) and data collecting card (7), (4) are provided with Cheng Pian mechanism to alignment stage, Cheng Pian mechanism, for placing hot blast sensor (8), regulates hot blast sensor (8) to move left and right or rotate by alignment stage (4); Measurement and control center (1) inside is provided with environmental model, and environmental model is hot temperature difference and wind speed and direction, the relation between environment temperature and ambient humidity on hot air velocity transducer (8) surface in actual environment; Environmentally model, export hot temperature difference signal corresponding to wind speed to be measured to precise temperature control mechanism (2), precise temperature control mechanism (2) be controlled to right thermal probe (3) set up on hot air velocity transducer (8) surface wind speed to be measured produce hot temperature poor, the output signal of hot air velocity transducer (8) feeds back to measurement and control center (1) by DC probe (5), signal conditioning circuit (6) and data collecting card (7), realizes the test of hot air velocity transducer (8), demarcation and calibration.
2. according to claim 1 without wind-tunnel virtual thermal air velocity transducer proving installation, it is characterized in that: the hot air velocity transducer (8) simultaneously placing more than one same model in alignment stage (4), measurement and control center (1) to the hot temperature difference signal that all hot air velocity transducers (8) provide identical wind speed to be measured corresponding, tests while realizing multiple hot blast sensor (8) simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346482.0A CN104977430B (en) | 2015-06-19 | 2015-06-19 | One kind is without wind-tunnel virtual thermal air velocity transducer test device |
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| CN201510346482.0A CN104977430B (en) | 2015-06-19 | 2015-06-19 | One kind is without wind-tunnel virtual thermal air velocity transducer test device |
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| CN104977430A true CN104977430A (en) | 2015-10-14 |
| CN104977430B CN104977430B (en) | 2017-12-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562420A (en) * | 2017-12-26 | 2018-09-21 | 北京航天益森风洞工程技术有限公司 | A kind of automatic calibration system and method for porous probe |
| CN110582766A (en) * | 2017-04-26 | 2019-12-17 | Sedic公司 | Method and system for automatically analyzing flow field by using virtual wind tunnel based on network |
| CN111077345A (en) * | 2019-12-20 | 2020-04-28 | 西安航天动力研究所 | Mach number calibration method under high-temperature supersonic velocity pure gas flow field environment |
| CN112067848A (en) * | 2020-08-05 | 2020-12-11 | 国家铁路局安全技术中心 | Calibration system and calibration method for high-speed rail strong wind disaster prevention equipment |
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| SU1536317A1 (en) * | 1986-02-24 | 1990-01-15 | Ташкентское Научно-Производственное Объединение "Сигнал" | Check complex for wind speed meters |
| JP2005147882A (en) * | 2003-11-17 | 2005-06-09 | Shinko Electric Co Ltd | Testing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110582766A (en) * | 2017-04-26 | 2019-12-17 | Sedic公司 | Method and system for automatically analyzing flow field by using virtual wind tunnel based on network |
| CN108562420A (en) * | 2017-12-26 | 2018-09-21 | 北京航天益森风洞工程技术有限公司 | A kind of automatic calibration system and method for porous probe |
| CN111077345A (en) * | 2019-12-20 | 2020-04-28 | 西安航天动力研究所 | Mach number calibration method under high-temperature supersonic velocity pure gas flow field environment |
| CN112067848A (en) * | 2020-08-05 | 2020-12-11 | 国家铁路局安全技术中心 | Calibration system and calibration method for high-speed rail strong wind disaster prevention equipment |
| CN112067848B (en) * | 2020-08-05 | 2023-03-07 | 国家铁路局安全技术中心 | Calibration system and calibration method for high-speed rail strong wind disaster prevention equipment |
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| CN104977430B (en) | 2017-12-05 |
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