CN104316980B - piezoelectric type rainfall measuring device - Google Patents

piezoelectric type rainfall measuring device Download PDF

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Publication number
CN104316980B
CN104316980B CN201410589738.6A CN201410589738A CN104316980B CN 104316980 B CN104316980 B CN 104316980B CN 201410589738 A CN201410589738 A CN 201410589738A CN 104316980 B CN104316980 B CN 104316980B
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CN
China
Prior art keywords
raindrop
measuring
piezoelectric
piezoelectric type
sound
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CN201410589738.6A
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Chinese (zh)
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CN104316980A (en
Inventor
杜利东
赵湛
张萌颖
吴少华
方震
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中国科学院电子学研究所
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Priority to CN201410589738.6A priority Critical patent/CN104316980B/en
Publication of CN104316980A publication Critical patent/CN104316980A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01WMETEOROLOGY
    • G01W1/00Meteorology
    • G01W1/14Rainfall or precipitation gauges

Abstract

The invention provides a kind of piezoelectric type rainfall measuring device. This piezoelectric type rainfall measuring device includes: hollow supporting body, and it is internally formed the support chamber of upper and lower both ends open; Sound detection sensitive membrane, at least includes piezoelectric material film, covers in the upper end open supporting chamber; Raindrop contact membranes, is prepared by the material that can conduct sound, is fixed on the top of sound detection sensitive membrane, forms an operatic tunes between the two; And measuring unit, it is electrically connected to two electrode up and down of sound detection sensitive membrane by two wires. Piezoelectric type rainfall measuring device of the present invention, by identifying the momentum of the amplitude recognition raindrop pulse of sound wave pulse, can obtain the parameter such as rainfall and raininess identifying on the basis of raindrop quantity and rain droplet size, it is achieved that the rain sensor of a kind of novelty.

Description

Piezoelectric type rainfall measuring device

Technical field

The present invention relates to technical field of piezoelectricity, particularly relate to a kind of piezoelectric type rainfall measuring device.

Background technology

Rainfall measuring device is applicable to the relevant departments such as meteorological observatory's (station), hydrometric station, agricultural, national defence and is used for remote measurement liquid precipitation, precipitation intensity, precipitation beginning and ending time. Station is observed and predicted for automatic system of hydrological data acquisition and transmission, automatic field for the purpose of scheduling of controlling flood, supply water, the management of hydropower reservoir station regimen.

Conventional Precipitation Record instrument has three kinds: Weighing type, tipping bucket type and hydrocone type. Siphon rainfall recorder utilizes float to raise with the water surface and vertically move, drive recording pen at moving recording the total precipitation on note paper by suitable mechanism, be suitable for artificial observation, but when siphon rainfall recorder is used in the north, due to the north easily have " mud rain ", the dirty rear siphon of siphon is abnormal. Can be influenced by the impact of dust when tipping bucket type rainfall measuring device and Weighing type rainfall measuring device life-time service, produce obstructing problem. Therefore conventional rainfall measuring device needs the maintenance of human at periodic intervals to clear up.

Summary of the invention

(1) to solve the technical problem that

In view of above-mentioned technical problem, the invention provides the rain sensor of a kind of novel piezoelectric type.

(2) technical scheme

According to an aspect of the invention, it is provided a kind of piezoelectric type rainfall measuring device. This piezoelectric type rainfall measuring device includes: hollow supporting body, and it is internally formed the support chamber of upper and lower both ends open; Sound detection sensitive membrane, at least includes piezoelectric material film, covers in the upper end open supporting chamber; Raindrop contact membranes, is prepared by the material that can conduct sound, is fixed on the top of sound detection sensitive membrane, forms an operatic tunes between the two; And measuring unit, it is electrically connected to two electrode up and down of sound detection sensitive membrane by two wires; Wherein, raindrop contact membranes issues out sound wave pulse in the effect of raindrop, this sound wave pulse is transferred to sound detection sensitive membrane by the operatic tunes, and it is converted into electric impulse signal, measuring unit is by identifying the quantity of the number record raindrop of electric impulse signal, by identifying the size of the amplitude recognition raindrop of electric impulse signal, and then obtain rainfall information.

(3) beneficial effect

From technique scheme it can be seen that klystron of the present invention has the advantages that

(1) by identifying the quantity of the number record raindrop of sound wave pulse, by identifying the momentum of the amplitude recognition raindrop pulse of sound wave pulse, and the size of the momentum of raindrop and raindrop has very big relation, therefore the size of raindrop is may identify which by demarcating the relation between rain droplet size and sound wave pulse amplitude, therefore, identifying, the basis of raindrop quantity and rain droplet size can obtain the parameter such as rainfall and raininess, it is achieved that the rain sensor of a kind of novelty;

(2) raindrop contact membranes is domed, flows to ground, it is possible to the impurity such as dust are washed after the measured device of raindrop, and therefore measurement apparatus need not be safeguarded;

(3) design of integration ensure that the impurity such as extraneous dust cannot be introduced into inside measurement apparatus; No-movable part solves conventional rainfall measuring device needs the problem of periodic maintenance, such that it is able to realize the observation of rainfall long-term, continuous, automatic.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of piezoelectric type rainfall measuring device according to embodiments of the present invention;

Fig. 2 is piezoelectric type rainfall measuring device shown in Fig. 1 along the sectional view in A-A ' face.

[main element]

1-raindrop contact membranes; 2-sound detection sensitive membrane; The 3-operatic tunes;

4-supports chamber; 5-measuring unit; 6-hollow supporting body;

7-wire.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail. It should be noted that in accompanying drawing or description describe, similar or identical part all uses identical figure number. The implementation not illustrated in accompanying drawing or describe, for form known to a person of ordinary skill in the art in art. Although it addition, the demonstration of the parameter comprising particular value can be provided herein, it is to be understood that parameter is without being definitely worth equal to corresponding, but corresponding value can be similar in acceptable error margin or design constraint. The direction term mentioned in embodiment, for instance " on ", D score, "front", "rear", "left", "right" etc., be only the direction with reference to accompanying drawing. Therefore, the direction term of use is used to illustrate not for limiting the scope of the invention.

The kinetic energy of raindrop is converted into the potential energy of piezoelectric by the present invention by piezoelectric, realizes the measurement of rainfall by detecting the change of potential energy, finally realizes the non-maintaining rainfall measuring device that can automatically run for a long time.

In one exemplary embodiment of the present invention, it is provided that a kind of piezoelectric type rainfall measuring device. Fig. 1 is the axonometric chart of piezoelectric type rainfall measuring device according to embodiments of the present invention. Fig. 2 is piezoelectric type rainfall measuring device shown in Fig. 1 along the sectional view in A-A ' face. Refer to Fig. 1 and Fig. 2, the present embodiment piezoelectric type rainfall measuring device includes: hollow supporting body 6, and it is internally formed support chamber 4; Sound detection sensitive membrane 2, is prepared by piezoelectric, covers in the upper opening supporting chamber 4, and its upper and lower two electrodes are connected to measuring unit 5 by wire 7; Raindrop contact membranes 1, is prepared by the material that can conduct sound, is fixed on the top of sound detection sensitive membrane 2, forms an operatic tunes 3 between the two.

Wherein, raindrop contact membranes 1 issues out sound wave pulse in the effect of raindrop, this sound wave pulse is transferred to sound detection sensitive membrane 2 by the operatic tunes 3, and it is converted into electric impulse signal by 2 sound wave pulses of sound detection sensitive membrane, measuring unit 5 is by identifying the quantity of the number record raindrop of electric impulse signal, by identifying the size of the amplitude recognition raindrop of electric impulse signal, and then obtain rainfall information.

Hereinafter each ingredient of the present embodiment piezoelectric type rainfall measuring device is described in detail.

Refer to Fig. 1 and Fig. 2, hollow supporting body 6 is in hollow cylindrical structure, and its top is drawn in the inside. The support chamber 4 that this shaped hollow supporter is formed is conducive to the raindrop flowed down by raindrop contact membranes 1 quickly to flow down. In other embodiments of the invention, this hollow supporting body may also be in truncated cone-shaped or other shapes.Additionally, the material of supporter 6 can be metal, it is also possible to be other solid materials.

Sound detection sensitive membrane 2 is disc, it is also possible to is and supports other shapes that top, chamber matches. Sound detection sensitive membrane 2 can be directly piezoelectric material film, it is alternatively sheet metal or the adherend of other non-metal plates that can conduct sound and piezoelectric material film or the combination of sheet metal or other non-metal plates that can conduct sound and piezoelectric material film deposited thereon. Piezoelectric herein can be lead zirconate titanate, Barium metatitanate. or Kynoar.

Raindrop contact membranes 1 is circular donor, it is also possible to be can receive raindrop to knock and can ensure that the shape that rainwater flows away. The material of this raindrop contact membranes 1 can be metal or other can conduct the nonmetallic materials of sound. Wherein, these nonmetallic materials that can conduct sound are such as politef, epoxy resin etc.

Wherein, raindrop contact membranes 1 is bonded in sound detection sensitive membrane 2, forms the operatic tunes 3 between the two. And raindrop contact membranes 1 is positioned at the top of the operatic tunes 3. Sound detection sensitive membrane 2 is positioned at the bottom of the operatic tunes 3.

It is internal that measuring unit 5 is positioned at support chamber 4, contacts with supporter 6, is connected with sound detection sensitive membrane 2 by wire 7. Wherein, wire 7 is plain conductor, it is possible to be that other can realize other wires that sound detection sensitive membrane 2 is electrically connected with measuring unit 5.

It should be noted that the inside of measuring unit 5 has the synopsis of an electric impulse signal amplitude and rain droplet size. After obtaining electric impulse signal, this measuring unit 5 obtains the signal of rain droplet size by searching this synopsis. In addition, identifying on the basis of raindrop quantity and rain droplet size about measuring unit and then calculating the content such as raininess and rainfall, those skilled in the art all know how to realize, for example with the mode such as integration, summation, this measuring unit can adopt hardware circuit to realize, single-chip microcomputer, programmable logic chip etc. can also be applied realize, not repeat them here.

The operation principle of the present embodiment piezoelectric type rainfall measuring device introduced below: raindrop contact membranes 1 sends the sound wave pulse of different amplitude under the effect of raindrop, sound wave pulse is transferred to sound detection sensitive membrane 2 by the operatic tunes, and it being converted into the signal of telecommunication by 2 sound wave pulse signals of sound detection sensitive membrane, the signal of telecommunication is transferred to measuring unit 5 by wire 7. Measuring unit 5 is by identifying the quantity of the number record raindrop of sound wave pulse, by identifying the momentum of the amplitude recognition raindrop pulse of sound wave pulse. And the size of the momentum of raindrop and raindrop has very big relation, therefore may identify which the size of raindrop by demarcating the relation between rain droplet size and sound wave pulse amplitude. Identifying, the basis of raindrop quantity and rain droplet size can obtain the parameter such as rainfall and raininess.

Present embodiments providing the unexistent rainfall measuring device utilizing piezo technology of a kind of prior art, it has numerous advantages:

(1) by identifying the quantity of the number record raindrop of sound wave pulse, by identifying the momentum of the amplitude recognition raindrop pulse of sound wave pulse, and the size of the momentum of raindrop and raindrop has very big relation, therefore the size of raindrop is may identify which by demarcating the relation between rain droplet size and sound wave pulse amplitude, therefore, identifying, the basis of raindrop quantity and rain droplet size can obtain the parameter such as rainfall and raininess, it is achieved that the rain sensor of a kind of novelty;

(2) design of integration ensure that the impurity such as extraneous dust cannot be introduced into inside measurement apparatus, simultaneously in measurement apparatus work process, raindrop contact with raindrop contact membranes 1 after along the operatic tunes 3 outer wall and support chamber 4 support shell 6 flow to ground, the impurity such as dust can being washed, therefore measurement apparatus need not be safeguarded.It can be seen that measurement apparatus no-movable part from the whole process of measurement apparatus work, solve the problem that conventional rainfall measuring device needs periodic maintenance, it is adaptable to long-term, continuous, automatic Observation meteorology rainfall element.

So far, already in connection with accompanying drawing, the present embodiment has been described in detail. According to above description, piezoelectric type rainfall measuring device of the present invention should have been had and clearly recognized by those skilled in the art.

Additionally, the above-mentioned definition to each element and method is not limited in various concrete structures, shape or the mode mentioned in embodiment, it can be carried out change simply or replace by those of ordinary skill in the art.

In sum, piezoelectric type rainfall measuring device of the present invention realizes the long-term of rainfall measuring device by piezo technology and runs automatically, has high application value.

Particular embodiments described above; the purpose of the present invention, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only specific embodiments of the invention; it is not limited to the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (10)

1. a piezoelectric type rainfall measuring device, it is characterised in that including:
Hollow supporting body (6), it is internally formed the support chamber (4) of upper and lower both ends open;
Sound detection sensitive membrane (2), at least includes piezoelectric material film, covers in the upper end open of described support chamber (4);
Raindrop contact membranes (1), is prepared by the material that can conduct sound, is fixed on the top of described sound detection sensitive membrane (2), forms an operatic tunes (3) between the two; And
Measuring unit (5), it is electrically connected to two electrode up and down of sound detection sensitive membrane (2) by two wires;
Wherein, described raindrop contact membranes (1) issues out sound wave pulse in the effect of raindrop, this sound wave pulse is transferred to described sound detection sensitive membrane (2) by the described operatic tunes (3), and it is converted into electric impulse signal, described measuring unit (5) is by identifying the quantity of the number record raindrop of electric impulse signal, by identifying the size of the amplitude recognition raindrop of electric impulse signal, and then obtain rainfall information.
2. piezoelectric type rainfall measuring device according to claim 1, it is characterised in that described sound detection sensitive membrane (2) including:
Piezoelectric material film;
Sheet metal maybe can conduct the non-metal plate of sound, with the coalition being bonded in piezoelectric material film thereon composition; Or
Sheet metal maybe can conduct the non-metal plate of sound, with the combination of piezoelectric material film composition deposited thereon.
3. piezoelectric type rainfall measuring device according to claim 2, it is characterised in that the material of described piezoelectric material film is lead zirconate titanate, Barium metatitanate. or Kynoar.
4. piezoelectric type rainfall measuring device according to claim 2, it is characterised in that the material of described non-metal plate is politef or epoxy resin.
5. piezoelectric type rainfall measuring device according to claim 1, it is characterised in that described raindrop contact membranes (1) is in dome-shaped.
6. piezoelectric type rainfall measuring device according to claim 1, it is characterised in that described raindrop contact membranes (1) maybe can be conducted the nonmetallic materials of sound and prepared by metal.
7. piezoelectric type rainfall measuring device according to claim 1, it is characterised in that the inside of described measuring unit (5) has the synopsis of an electric impulse signal amplitude and rain droplet size;
After obtaining electric impulse signal, this measuring unit (5) obtains the information of rain droplet size by searching this synopsis.
8. piezoelectric type rainfall measuring device according to claim 1, it is characterised in that:
Described measuring unit, after the size of the quantity and raindrop that obtain raindrop, obtains rainfall information by the mode sued for peace.
9. piezoelectric type rainfall measuring device according to any one of claim 1 to 8, it is characterised in that described hollow supporting body (6) is cylindrical or truncated cone-shaped.
10. piezoelectric type rainfall measuring device according to any one of claim 1 to 8, it is characterised in that described hollow supporting body (6) is prepared by metal material.
CN201410589738.6A 2014-10-28 2014-10-28 piezoelectric type rainfall measuring device CN104316980B (en)

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Publication number Priority date Publication date Assignee Title
US9841533B2 (en) 2016-03-08 2017-12-12 Arable Labs, Inc. Disdrometer having acoustic transducer and methods thereof
CN108132095A (en) * 2017-12-21 2018-06-08 苏州斯威高科信息技术有限公司 A kind of measuring method and device of structural member self-resonant frequency
CN108196321A (en) * 2017-12-21 2018-06-22 苏州斯威高科信息技术有限公司 A kind of rainfall measuring device and method
CN109387887B (en) * 2018-11-18 2020-12-18 南京信息工程大学 Rainfall measuring method and device based on passive impulse method

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JP2007303887A (en) * 2006-05-09 2007-11-22 Denso Corp Raindrop detection device
JP5459273B2 (en) * 2011-06-30 2014-04-02 株式会社デンソー Raindrop detector
CN103197360A (en) * 2012-01-06 2013-07-10 王学永 Single cavity type photoelectric rain and snow meter
CN103064131A (en) * 2012-12-12 2013-04-24 朱铭鑫 Multifunctional meteorological collection device and control system thereof
CN203117440U (en) * 2012-12-12 2013-08-07 朱铭鑫 Meteorological collection device
CN103076642A (en) * 2012-12-31 2013-05-01 雷霖 Minitype wireless intelligent rain gauge with ZigBee technology

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