CN203299404U - Device for identifying raindrop size distribution - Google Patents
Device for identifying raindrop size distribution Download PDFInfo
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- CN203299404U CN203299404U CN201320035451XU CN201320035451U CN203299404U CN 203299404 U CN203299404 U CN 203299404U CN 201320035451X U CN201320035451X U CN 201320035451XU CN 201320035451 U CN201320035451 U CN 201320035451U CN 203299404 U CN203299404 U CN 203299404U
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- raindrop
- size distribution
- sound
- raindrops
- eardrum
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Abstract
The utility model discloses a device for identifying raindrop size distribution and belongs to the meteorological information technical field. The device comprises a tympanic membrane, a sound pick-up used for obtaining sound signals produced when raindrops hit the tympanic membrane, and a processing module which is used for performing analog-to-digital conversion on the sound signals to obtain raindrop sound amplitude and obtaining the diameters and the velocities of raindrops according to the raindrop sound amplitude, and obtaining the raindrop size distribution according to the diameters and the velocities of the raindrops; and the voice pick-up is arranged below the tympanic membrane, and is electrically connected with the processing module. According to the device of the utility model, the sound signals produced when the raindrops hit the tympanic membrane can be obtained through the sound pick-up; the processor is adopted to perform the analog-to-digital conversion on the sound signals, such that the raindrop sound amplitude can be obtained; according to the raindrop sound amplitude, the diameters of the raindrops and the distribution of the diameters of the raindrops can be obtained; and then, the raindrop size distribution can be obtained. The device can distinguish paratactic raindrops through the sound signals obtained by the sound pick-up, and therefore, testing can be more accurate. The device for identifying raindrop size distribution is advantageous in simple structure, high practicability and low cost.
Description
Technical field
The utility model relates to the weather information technical field, particularly a kind of device of identifying raindrop size distribution.
Background technology
Raindrop size distribution refers in unit space, the quantity of the raindrop of diameter in a certain scope, the i.e. distribution of raindrop size in unit volume.The research of raindrop size distribution, very valuable to the research of the aspects such as the process of cloud development, process that precipitation forms, mechanism that precipitation forms, destruction of surface form.
Existing a kind of laser raindrop size distribution analysis measuring device, this device comprises laser sensor and the traffic weather sensor signal interface unit that is electrically connected to signal control processor respectively.This device utilizes the delustring measuring principle, the optional position in measured zone, and when raindrop passed laser beam, signal will change, and the size of the dimmed degree of brightness reflection raindrop diameter is derived decline rate according to the duration of signal.According to the number of the raindrop in the large minizone of different-diameter and friction speed interval, draw out the raindrop spectrogram.
In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art:
Existing laser raindrop size distribution analysis measuring device adopts the delustring measuring principle to measure raindrop, when raindrop arranged side by side pass laser beam, this measurement mechanism can be processed raindrop arranged side by side as raindrop, can not differentiate raindrop arranged side by side, reduced the degree of accuracy of test, and this device more complicated, expensive, the cost that obtains raindrop size distribution is higher.
The utility model content
In order to solve the problem of prior art, the utility model embodiment provides a kind of device of identifying raindrop size distribution.Described technical scheme is as follows:
The utility model embodiment provides a kind of device of identifying raindrop size distribution, and described device comprises:
Eardrum, be used to the acoustic pickup that obtains the voice signal that the described eardrum of raindrop impact produces, for according to described voice signal, obtaining the processing module of raindrop size distribution; Described acoustic pickup is located at described eardrum below, and described acoustic pickup and described processing module are electrically connected to.
Particularly, described processing module comprises single-chip microcomputer.
Preferably, described device also comprises the wave filter that carries out noise reduction for the described voice signal that described acoustic pickup is obtained, and described processing module is electrically connected to described acoustic pickup by described wave filter.
Particularly, described eardrum is that polyvinyl chloride film, the glass fibre that is stretched on metallic cylinder covers polytetrafluoroethylene film or metallic film.
Preferably, the thickness of described eardrum is 0.1～0.2mm.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
By being set, obtains by acoustic pickup the voice signal of raindrop impact eardrum, and adopt processor to carry out analog to digital conversion to this voice signal to obtain the raindrop acoustic amplitude, according to the raindrop acoustic amplitude, obtain raindrop diameter and raindrop diameter distribution, and acquisition raindrop size distribution, this device can be distinguished raindrop arranged side by side by the voice signal that acoustic pickup obtains, and tests more precisely, and this apparatus structure is simple, practicality is high, and cost is low.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of apparatus structure schematic diagram of identifying raindrop size distribution that the utility model embodiment provides;
Fig. 2 is the schematic diagram of the voice signal that obtains that provides of the utility model embodiment;
Fig. 3 is the schematic diagram of the raindrop acoustic amplitude of the acquisition that provides of the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment
The utility model embodiment provides a kind of device of identifying raindrop size distribution, referring to Fig. 1, this device comprises: eardrum 1, be used to the acoustic pickup 2 of the voice signal that obtains the raindrop impact eardrum, carry out for voice signal the processing module 3 that analog to digital conversion obtains the raindrop acoustic amplitude and obtains raindrop diameter and raindrop speed and obtain raindrop size distribution according to raindrop diameter and raindrop speed according to the raindrop acoustic amplitude; Acoustic pickup 2 is located at eardrum 1 1cm place, below, and acoustic pickup 2 and processing module 3 are electrically connected to.
Particularly, in the present embodiment, can adopt model is the voice signal that the acoustic pickup of PSP407 obtains the raindrop impact eardrum.Adopt the voice signal of acoustic pickup acquisition as shown in Figure 2.
Particularly, processing module 3 also comprises single-chip microcomputer.More specifically, in the present embodiment, can adopt model is that the single-chip microcomputer of STC12c2052 carries out analog to digital conversion to the voice signal that acoustic pickup obtains, and simultaneously this voice signal is carried out to wavelet threshold filtering.The voice signal that Fig. 2 obtains, after analog to digital conversion, obtains raindrop acoustic amplitude as shown in Figure 3, and is as can be known by this figure, and raindrop sampled voice frequency is 1650Hz, and raindrop magnitude of sound signal, in ± 2V, has 10 raindrop impact eardrums in 5s.
In the present embodiment, in processing module 3, can preset and preserve the corresponding relation of raindrop acoustic amplitude and raindrop momentum, according to this relation, determine the raindrop momentum, then according to following formula, calculate raindrop diameter and raindrop speed:
p=mv；
m=0.523ρd
3；
=-0.1021+4.93d-0.9551d
2+0.07934d
3-0.002362d
4；
Wherein, p represents the raindrop momentum, and m represents the raindrop quality, and v represents raindrop speed, and ρ represents density, and d represents raindrop diameter.According to the raindrop diameter that obtains and raindrop speed, can further derive raindrop diameter distribution, quantity of precipitation, precipitation kinetic energy and type of precipitation, by rainfall is carried out to qualitative analysis, can obtain rainfall intensity, distinguish the precipitation such as drizzle, heavy rain, according to the number of the raindrop in the large minizone of different-diameter and friction speed interval, draw out raindrop size distribution.This technology is well known to those skilled in the art, and is not described in detail in this.
Alternatively, can adopt the water droplet of transmitter with different speed emission equals in quality, thereby realize adopting the water droplet of different momentum to hit eardrum.
Preferably, this device also comprises the wave filter 4 that carries out noise reduction for the voice signal that acoustic pickup 2 is obtained, and processing module 3 is electrically connected to acoustic pickup 2 by wave filter 4.Particularly, in the present embodiment, the wave filter that can adopt MAX274 to coordinate resistance to make carries out noise reduction.
Preferably, in the present embodiment, eardrum can cover polytetrafluoroethylene film or metallic film for polyvinyl chloride film, the glass fibre that is stretched on metallic cylinder.
Particularly, the thickness of eardrum is 0.1～0.2mm.More specifically, eardrum can be for being stretched in the thick polyvinyl chloride film of 0.2mm on diameter 10cm metallic cylinder.
Alternatively, this device can also comprise the power module 5 that is electrically connected to acoustic pickup 2, processing module 3 and wave filter 4 respectively.Particularly, this power module 5 can be that 12V power is the power supply of 10W for voltage.
The beneficial effect that the technical scheme that the utility model example provides is brought is: the voice signal that obtains the raindrop impact eardrum by acoustic pickup is set, and adopt processor to carry out analog to digital conversion to this voice signal to obtain the raindrop acoustic amplitude, according to the raindrop acoustic amplitude, obtain raindrop diameter and raindrop diameter distribution, and acquisition raindrop size distribution, this device can be distinguished raindrop arranged side by side by the voice signal that acoustic pickup obtains, and tests more precisely, and this apparatus structure is simple, practicality is high, and cost is low.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a device of identifying raindrop size distribution, is characterized in that, described device comprises eardrum, be used to the acoustic pickup that obtains the voice signal that the described eardrum of raindrop impact produces, for according to described voice signal, obtaining the processing module of raindrop size distribution; Described acoustic pickup is located at described eardrum below, and described acoustic pickup and described processing module are electrically connected to.
2. device according to claim 1, is characterized in that, described processing module comprises single-chip microcomputer.
3. device according to claim 1, is characterized in that, described device also comprises the wave filter that carries out noise reduction for the described voice signal that described acoustic pickup is obtained, and described processing module is electrically connected to described acoustic pickup by described wave filter.
4. device according to claim 3, is characterized in that, described eardrum is that the polyvinyl chloride film, the glass fibre that are stretched on metallic cylinder cover polytetrafluoroethylene film or metallic film.
5. device according to claim 4, is characterized in that, the thickness of described eardrum is 0.1～0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320035451XU CN203299404U (en) | 2013-01-23 | 2013-01-23 | Device for identifying raindrop size distribution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320035451XU CN203299404U (en) | 2013-01-23 | 2013-01-23 | Device for identifying raindrop size distribution |
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| CN203299404U true CN203299404U (en) | 2013-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311508A (en) * | 2021-04-15 | 2021-08-27 | 泸州市气象局 | Method for recognizing weather process by using voice |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311508A (en) * | 2021-04-15 | 2021-08-27 | 泸州市气象局 | Method for recognizing weather process by using voice |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20140123 |