CN101587130A - A kind of miniature wind detection unit crossed and encapsulated type wind speed wind transducer - Google Patents

Abstract

A kind of miniature wind detection unit crossed and encapsulated type wind speed wind transducer of the present invention comprises the independently board-like wind detection unit of miniature thin, each unit intersection encapsulation; Each wind detection unit comprises: supporter, thin plate, sensitive beam, strain transducer.The structure that thin plate is moved by wind; Sensitive beam is as measurement structure, and the wind thin plate causes responsive deflection of beam deformation, measures the size of different directions wind acting force by the degree of crook of measuring sensitive beam; Strain transducer is the electric signal of the signal transition of sensitive beam for measuring, and supporter is as the supporting construction of whole sensor; Encapsulate the measuring wind wind direction by the intersection of the board-like wind detection unit of miniature thin independently.The characteristics of sensor of the present invention are that independently the board-like wind detection unit intersection of miniature thin encapsulates measuring wind wind direction information; Encapsulation volume is less than 30 millimeters * 15 millimeters * 15 millimeters; Can be widely used in aspects such as national defence aviation, weather environment, communications and transportation, industry manufacturing, agricultural production.

Description

A kind of miniature wind detection unit crossed and encapsulated type wind speed wind transducer

Technical field

The present invention relates to sensing technology, particularly miniature wind detection unit crossed and encapsulated type wind speed wind transducer.

Background technology

Wind speed and direction is important information parameter in the meteorological observation, for national defence aviation, weather environment, communications and transportation, industry manufacturing, agricultural production etc. important effect is arranged.Wind speed and direction information is to an important parameters of the prediction of the such weather of sleet rain or shine, can be environmental monitoring, economic development, the scheduling of production of fishery agricultural, and the flight parameter of revising spacecraft provides foundation.

Conventional wind speed wind direction sensor mainly contains vane weathervane wind detection sensor, pressure type wind detection sensor, ultrasonic type wind detection sensor, microwave type wind detection sensor, differential wind detection sensor, ionic formula wind detection sensor, laser type wind detection sensor etc.Though in these sensors, some has characteristics such as very large measurement range, some precision be very high, all has bulky shortcoming.Along with the development of MEMS technology, make in national defence aviation, weather environment, communications and transportation, industry, press in the agricultural production that to have a volume little, in light weight, the miniature wind direction and wind velocity sensor of the MEMS of the characteristics that cost is low.

At present, domestic and international miniature wind detection sensor mainly contains two kinds of hot type wind detection sensor and Li Shi wind detection sensors, and wherein the maximum of usefulness are the hot type wind detection sensors.

The hot type wind detection sensor is based on thermal source and comes measuring wind and wind direction in the distinguished and admirable principle that flows through the thermal gradient of back generation.Along with change of wind velocity, the aweather middle heat that transmits causes the variation of thermal source thermal gradient also changing, and can access the information of wind by the variation of processing of circuit temperature-measuring thermistor resistance.Such sensor bulk minimum, simple in structure, can be integrated, cost is low, and is most widely used general, and shortcoming is that precision is low, and high wind speed is measured unstable, and power consumption is big.

Power formula wind detection sensor is based on wind and acts on sensitive structure, causes that the principle of the deformation of sensitive structure is come measuring wind and wind direction, obtains wind speed and direction information by the deformation of measuring sensitive structure.Along with change of wind velocity, the power that wind is applied on the sensitive structure changes, and causes the variation of sensitive structure deformation, by the variation of electric circuit inspection sensitive structure deformation, can access the information of wind.Such sensor bulk is little, the structure relative complex, and cost is lower, and shortcoming is that the measurement of wind direction can only realize positive and negative both direction.

Hot type wind detection sensor shortcoming is that precision is low in the at present domestic and international wind speed and direction transducer, and high wind speed is measured unstable, and power consumption is big; Power formula wind detection sensor shortcoming is that the measurement of wind direction can only realize positive and negative both direction.

Summary of the invention

The objective of the invention is in order to solve the existing in prior technology problem, provide a kind of wind speed and direction can simultaneously-measured wind detection unit crossed and encapsulated type wind speed wind transducer.

In order to realize above-mentioned purpose, technical solution of the present invention is:

A kind of miniature wind detection unit crossed and encapsulated type wind speed wind transducer, it comprises most the independently board-like wind detection units of miniature thin, most wind detection units are that axis intersects encapsulation up and down with Y-Y ';

Each independently the board-like wind detection unit of miniature thin comprise: supporter, thin plate, sensitive beam, strain transducer, wherein,

Outer rim is the supporter of sensor; The supporter inner side edge puts in parallel in frame or perpendicular at least one strip sensitive beam of axle Y-Y ', the sensitive beam other end is connected with thin plate, and thin plate and supporter are suitable;

Strain transducer is installed with on sensitive beam, is positioned at a side surface of sensitive beam, and extension line is placed on the supporter.

Described sensor, it is described to be that axis intersects encapsulation up and down with Y-Y ', be that adjacent independent wind detection unit goes up up and down or down with Y-Y ' with supporter be that the axis intersection is affixed.

Described sensor, number M and each independent wind detection unit angle theta each other of independent wind detection unit are determined according to concrete request for utilization in its described intersection encapsulation.

Described sensor, its described thin plate be shaped as square or rectangular or round.

Described sensor, the number N of its described a plurality of strip sensitive beam is determined according to concrete request for utilization.

Described sensor, it is described parallel or be central shaft perpendicular at least one strip sensitive beam of axle Y-Y ' with Y-Y ' axle, in central shaft both sides symmetric offset spread.

Described sensor, being shaped as of its described strain transducer is snakelike, and size is suitable with the shape of sensitive beam.

Described sensor, the electric connecting mode of its described strain transducer can be single resistance, electric bridge, electric capacity.

Advantage of the present invention: wind speed and direction can be measured simultaneously; Utilize microelectromechanical systems (MEMS) technology that element manufacturing is got very little (can less than 30 millimeters * 15 millimeters * 15 millimeters); Adopt the MEMS technology, reduce device cost, reduce the power consumption of device.

Description of drawings

Fig. 1 illustrates the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer intersection encapsulation synoptic diagram;

Fig. 2 illustrates the single wind detection unit synoptic diagram of the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer;

Fig. 3 illustrates the single wind detection unit vertical view of the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer;

Fig. 4 illustrates the single wind detection unit sectional view of the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer.

Embodiment

Technical scheme of the present invention: the bending that miniature thin plate can cause the sensitive beam structure is crossed in wind, strain transducer on the sensitive beam changes this crooked deformation into a certain electricity parameter, and (for example: variation voltage difference), the wind detection unit intersection encapsulates the information that can obtain wind speed and direction simultaneously by inciting somebody to action independently.Concrete principle is as follows:

The power F that wind acts on thin plate is the function F (y) of thin plate length, and the suffered moment T of sensitive beam is shown below.

$T=\underset{0}{\overset{h}{\∫}}F\left(y\right)\mathrm{dy}$

The strain stress that draws sensitive beam according to moment is shown below.

$\mathrm{\&epsiv;}=\frac{\mathrm{<figure-callout\; id="2"\; label="Tt"\; filenames="A2008101122060011H1.png,A2008101122060011H2.png"\; state="\{\{state\}\}">Tt</figure-callout>}}{2\mathrm{EI}}$

Wherein t is the thickness of sensitive beam, and E is outstanding sensitive beam Young's modulus of elasticity, and I is the moment of inertia of sensitive beam.

The deformation bending of sensitive beam causes that the changes delta of the electrical quantities of strain transducer equals G ε, and G is the coefficient of strain of strain transducer.

The power F that wind acts on thin plate is shown below.

$F\left(y\right)={\mathrm{<figure-callout\; id="1"\; label="C\; D"\; filenames="A2008101122060011H1.png"\; state="\{\{state\}\}">C</figure-callout>}}_D\frac{1}{2}\mathrm{\&rho;}{u}_{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A2008101122060011H1.png,A2008101122060011H2.png"\; state="\{\{state\}\}">y</figure-callout>}}^2\mathrm{wdy}$

So the changes delta expression formula of the electrical quantities of strain transducer is:

$\mathrm{\&Delta;}=\frac{{\mathrm{GC}}_D\mathrm{\&rho;wt}\underset{0}{\overset{h}{\&Integral;}}{u}_{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A2008101122060011H1.png,A2008101122060011H2.png"\; state="\{\{state\}\}">y</figure-callout>}}^2\mathrm{<figure-callout\; id="4"\; label="dy"\; filenames="A2008101122060011H1.png,A2008101122060011H2.png"\; state="\{\{state\}\}">dy</figure-callout>}}{4\mathrm{EI}}$

The board-like wind detection unit crossed and encapsulated type wind speed of this miniature thin wind transducer of indication of the present invention, characteristics are that wind speed and direction can be measured simultaneously, device volume is less than 30 millimeters * 15 millimeters * 15 millimeters, characteristic such as can produce in batches.Sensor of the present invention can be widely used in fields such as national defence aviation, weather environment, communications and transportation, industry manufacturing, agricultural production.

Below in conjunction with accompanying drawing the present invention is described in detail, be to be noted that described embodiment only is intended to be convenient to the understanding of the present invention, and it is not played any qualification effect.

As the board-like wind detection unit crossed and encapsulated type wind speed of Fig. 1 miniature thin of the present invention wind transducer intersection encapsulation synoptic diagram, Fig. 2 is the single wind detection unit synoptic diagram of the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer, Fig. 3 is the single wind detection unit vertical view of the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer, and Fig. 4 is the single wind detection unit sectional view of the board-like wind detection unit crossed and encapsulated type wind speed of miniature thin of the present invention wind transducer.

Its structure comprises two independently intersection encapsulation 1 of the board-like wind detection unit of miniature thin; Each independently the board-like wind detection unit of miniature thin comprise: supporter 2, wind-engaging thin plate 3, sensitive beam 4, strain transducer 5.

Described intersection encapsulation 1 be two independently the board-like wind detection unit of miniature thin be that axis intersects encapsulation up and down with Y-Y '.

Described thin plate 3 be shaped as rectangle.

Described sensitive beam 4 quantity N=2.

Described sensitive beam 4 is positioned at thin plate 3 one sides and being the center line symmetry with Y-Y ' axle.

Described strain transducer (5) electric connecting mode is single resistance.

The principle of work of the board-like wind speed wind direction sensor of this miniature thin of the present invention is:

Tested wind is behind sensor, thin plate 3 is subjected to the effect of the power of wind, thin plate 3 causes the bending of sensitive beam 4, strain transducer 5 on the sensitive beam 4 converts the crooked deformation quantity of the sensitive beam that wind causes 4 of different directions the variable quantity of certain electrical signal of corresponding strain transducer 5 to, thereby can while measuring wind and wind direction.

The above; only be specific embodiments of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the present invention; can understand conversion or the replacement expected; all should be encompassed within protection scope of the present invention, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (8)

1, a kind of miniature wind detection unit crossed and encapsulated type wind speed wind transducer is characterized in that: comprise most the independently board-like wind detection units of miniature thin, most wind detection units are that axis intersects encapsulation (1) up and down with Y-Y ';

Each independently the board-like wind detection unit of miniature thin comprise: supporter (2), thin plate (3), sensitive beam (4), strain transducer (5), wherein,

Outer rim is the supporter (2) of sensor; Supporter (2) inner side edge puts in parallel in frame or perpendicular at least one strip sensitive beam (4) of axle Y-Y ', sensitive beam (4) other end is connected with thin plate (3), and thin plate (3) is suitable with supporter (2);

Strain transducer (5) is installed with on sensitive beam (4), is positioned at a side surface of sensitive beam (4), and extension line is placed on the supporter (2).

2, sensor according to claim 1 is characterized in that: described is that axis intersects encapsulation (1) up and down with Y-Y ', be that adjacent independent wind detection unit goes up up and down or down with Y-Y ' with supporter (2) be that the axis intersection is affixed.

3, sensor according to claim 1 and 2 is characterized in that: number M and each independent wind detection unit angle theta each other of independent wind detection unit in the described intersection encapsulation (1), determine according to concrete request for utilization.

4, sensor according to claim 1 is characterized in that: described thin plate (3) be shaped as square or rectangular or round.

5, sensor according to claim 1 is characterized in that: described parallel or be central shaft with Y-Y ' axle perpendicular at least one strip sensitive beam (4) of axle Y-Y ', and in central shaft both sides symmetric offset spread.

6, sensor according to claim 1 or 5 is characterized in that: the number N of described a plurality of strip sensitive beam (4) is determined according to concrete request for utilization.

7, sensor according to claim 1 is characterized in that: being shaped as of described strain transducer (5) is snakelike, and size is suitable with the shape of sensitive beam (4).

8, sensor according to claim 1 is characterized in that: the electric connecting mode of described strain transducer (5) can be single resistance, electric bridge, electric capacity.

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