Droplet rain sensor

Abstract

The present invention belongs to the technical field of rainfall measurement, and in particular, relates to a droplet type rain sensor. The carrier of the droplet type rain sensor is vertically through-set, the funnel is set at the top of the carrier, the bottom of the funnel is provided with a plurality of water outlets, a plurality of needle tubes are provided, the needle tubes and the water outlets are arranged one by one, the needle tubes are vertically fixedly set at the lower side of the corresponding water outlets, the needle tubes are connected with the corresponding water outlets, a support plate is fixedly set in the carrier, the support plate is located below the plurality of needle tubes, and a water outlet for discharging rainwater falling on the support plate is provided on the circumferential surface of the carrier; a closing plate is fixedly set at the lower part of the carrier, the closing plate, the support plate and the carrier constitute a sound cavity, a microphone and a measuring module are provided in the sound cavity, and the measuring module and the microphone are connected. The present invention can be suitable for rainfall observation work with different rainfall amounts, and has good practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of rainfall measurement, and in particular relates to a droplet type rainfall sensor. Background Art

[0002] Rainfall sensors are the main equipment used for rainfall observation, which can measure the rainfall amount and rainfall intensity per unit time. At present, the instruments and equipment used for automatic rainfall measurement are mainly bucket-type, siphon-type and weighing-type rainfall sensors in terms of measurement methods.

[0003] The disadvantage of the tipping bucket rain gauge and the siphon rain gauge is that the rainfall is measured intermittently, and the tipping bucket or siphon rain gauge must reach a certain amount to complete the tipping or siphoning. It is not suitable for rainfall observation with a small amount of rainfall. The structure of the weighing rain gauge is very complex, and it includes water collection, weighing, drainage and other devices, which is not conducive to production and manufacturing.

[0004] Therefore, the existing technology needs to be improved. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a droplet type rain sensor.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A droplet type rain sensor of the present invention comprises:

[0008] A carrier, wherein the carrier is vertically arranged through-through;

[0009] A funnel, wherein the funnel is arranged at the top of the carrier, and a plurality of water outlet holes are arranged at the bottom of the funnel;

[0010] A needle tube, wherein a plurality of needle tubes are provided, and the needle tubes and the water outlet holes are provided in one-to-one correspondence, and the needle tubes are fixedly provided vertically at the lower side of the corresponding water outlet hole, and the needle tubes are communicated with the corresponding water outlet hole;

[0011] A supporting thin plate, the supporting thin plate is fixedly arranged in the carrier, the supporting thin plate is located below the plurality of needle tubes, and a water outlet for draining rainwater falling on the supporting thin plate is arranged on the peripheral surface of the carrier;

[0012] A closing plate is fixedly arranged at the lower part of the carrier. The closing plate, the supporting thin plate and the carrier form an acoustic cavity. A pickup and a measuring module are arranged in the acoustic cavity. The measuring module is connected to the pickup.

[0013] The present invention provides a droplet type rain sensor. Since the carrier is arranged through vertically, the funnel is arranged at the top of the carrier, and the bottom of the funnel is provided with a plurality of water outlet holes, rainwater can be discharged through the plurality of water outlet holes at the bottom of the funnel; since the needle tubes and the water outlet holes are arranged in one-to-one correspondence, the needle tubes are fixedly arranged vertically at the lower side of the corresponding water outlet holes, and the needle tubes are connected with the corresponding water outlet holes, rainwater discharged from the water outlet holes will enter the needle holes and be discharged from the lower end of the needle holes in the form of raindrops; since the support thin plate is fixedly arranged in the carrier, the support thin plate is located below the plurality of needle tubes, rainwater discharged from the pinholes The raindrops discharged from the lower end will fall onto the supporting thin plate and generate sound waves. Since the closing plate is fixedly arranged at the lower part of the carrier, the closing plate, the supporting thin plate and the carrier constitute a sound cavity. A microphone and a measuring module are arranged in the sound cavity. The measuring module is connected to the microphone, so that the microphone can collect the number of sound waves from the raindrops falling on the supporting thin plate and count them through the measuring module. The rainfall can be calculated according to the number and volume of raindrops. Compared with the rainfall sensor shown in the background technology, its structure is simple and does not belong to intermittent measurement. It is suitable for rainfall observation work with different rainfall amounts and has good practicality.

[0014] Furthermore, the funnel comprises:

[0015] A first funnel, the first funnel is in the shape of a truncated cone with a thick top and a thin bottom, a plurality of needle tubes are arranged at the bottom of the first funnel, and the plurality of needle tubes at the bottom of the first funnel are arranged at equal angles around the central axis of the first funnel;

[0016] A second funnel, the second funnel is columnar, the second funnel is coaxially fixedly arranged at the bottom of the first funnel, the second funnel is arranged between the plurality of needle tubes at the bottom of the first funnel, a plurality of needle tubes are arranged at the bottom of the second funnel, and the plurality of needle tubes at the bottom of the second funnel are arranged at equal angles around the central axis of the second funnel;

[0017] The third funnel is columnar and coaxially fixed at the bottom of the second funnel. The third funnel is arranged between the plurality of needle tubes at the bottom of the second funnel, and a needle tube is arranged in the middle of the bottom of the third funnel.

[0018] Furthermore, a first filter screen is arranged on the top of the first funnel, a second filter screen is arranged inside the first funnel, a filter diameter of the second filter screen is smaller than a filter diameter of the first filter screen, the second filter screen is in a cone shape coaxial with the first funnel, and the top of the second filter screen is fixedly arranged on the top of the first funnel.

[0019] Preferably, the diameter of the needle tube is 3 mm.

[0020] Furthermore, the lower edge of the water outlet is flush with the upper edge of the supporting thin plate, and a water outlet pipe is arranged in the water outlet, and the water outlet pipe is located outside the carrier.

[0021] Furthermore, a sponge is arranged on the supporting plate, and the sponge is arranged at the entrance of the water outlet.

[0022] Furthermore, an annular bracket is fixedly arranged in the carrier, and the supporting thin plate is fixedly arranged on the annular bracket.

[0023] Another droplet type rain sensor of the present invention comprises:

[0024] A carrier, wherein the carrier is vertically arranged through-through;

[0025] A funnel, wherein the funnel is arranged at the top of the carrier, and a plurality of water outlet holes are arranged at the bottom of the funnel;

[0026] A needle tube, wherein a plurality of needle tubes are provided, and the needle tubes and the water outlet holes are provided in one-to-one correspondence, and the needle tubes are fixedly provided vertically at the lower side of the corresponding water outlet hole, and the needle tubes are communicated with the corresponding water outlet hole;

[0027] Photoelectric tubes, the photoelectric tubes and the needle tubes are arranged in one-to-one correspondence, and each of the photoelectric tubes is fixedly arranged directly below the corresponding needle tube;

[0028] A measuring module is connected to the photoelectric tube.

[0029] Another droplet type rain sensor of the present invention has a carrier that is vertically through-set, a funnel that is set at the top of the carrier, and a plurality of water outlet holes that are set at the bottom of the funnel, so that rainwater can be discharged through the plurality of water outlet holes at the bottom of the funnel; since the needle tube and the water outlet holes are set in one-to-one correspondence, the needle tube is fixedly set vertically at the lower side of the corresponding water outlet hole, and the needle tube and the corresponding water outlet hole are connected, so that rainwater discharged from the water outlet hole will enter the needle hole and be discharged from the lower end of the pinhole in the form of raindrops; since the photoelectric tubes and the needle tubes are set in one-to-one correspondence, each photoelectric tube is fixedly set directly below the corresponding needle tube, when raindrops are discharged from the needle tube and pass through the transmitting tube and receiving tube of the corresponding photoelectric tube, the photoelectric tube generates a switch on and off, and the measuring module counts the switches, and the rainfall can be calculated according to the number and volume of raindrops. Compared with the rain sensor shown in the background technology, it has a simple structure and does not belong to intermittent measurement, can be suitable for rainfall observation work with different rainfall amounts, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a droplet type rain sensor according to the first embodiment of the present invention;

[0032] Figure 2 for Figure 1 The structural diagram of the funnel in FIG.

[0033] Figure 3 This is a diagram of a droplet type rain sensor according to the second embodiment of the present invention;

[0034] Figure 4 for Figure 3 Schematic diagram of the arrangement of photoelectric tubes. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] Figure 1 A droplet type rain sensor according to the first embodiment of the present invention is combined with Figure 1 The droplet rain sensor includes a carrier 1, a funnel 2, a needle tube 3, a supporting thin plate 4, a closing plate 5, a microphone 6 and a measuring module 7, wherein the carrier 1 is vertically through-arranged, the funnel 2 is arranged at the top of the carrier 1, a plurality of water outlet holes are arranged at the bottom of the funnel 2, a plurality of needle tubes 3 are arranged, the needle tubes 3 and the water outlet holes are arranged one by one, the needle tubes 3 are vertically fixedly arranged at the lower side of the corresponding water outlet holes, the needle tubes 3 are connected with the corresponding water outlet holes, the supporting thin plate 4 is fixedly arranged in the carrier 1, the supporting thin plate 4 is located below the plurality of needle tubes 3, a water outlet 8 for discharging rainwater falling on the supporting thin plate 4 is arranged on the circumferential surface of the carrier 1, the closing plate 5 is fixedly arranged at the lower part of the carrier 1, the closing plate 5, the supporting thin plate 4 and the carrier 1 constitute a sound cavity, the sound cavity is provided with a microphone 6 and a measuring module 7, and the measuring module 7 is connected to the microphone 6.

[0038] The above embodiment provides a droplet-type rain sensor. Since the carrier is arranged through vertically, the funnel is arranged at the top of the carrier, and a plurality of water outlet holes are arranged at the bottom of the funnel, rainwater can be discharged through the plurality of water outlet holes at the bottom of the funnel. Since the needle tubes and the water outlet holes are arranged in a one-to-one correspondence, the needle tubes are fixedly arranged vertically at the lower side of the corresponding water outlet holes, and the needle tubes are connected to the corresponding water outlet holes. Thus, rainwater discharged from the water outlet holes will enter the needle holes and be discharged from the lower end of the needle holes in the form of raindrops. Since the support sheet is fixedly arranged in the carrier, the support sheet is located below the plurality of needle tubes. Thus, rainwater discharged from the pinholes will enter the pinholes and be discharged from the lower end of the pinholes in the form of raindrops. The raindrops discharged from the lower end will fall onto the supporting thin plate and generate sound waves. Since the closing plate is fixedly arranged at the lower part of the carrier, the closing plate, the supporting thin plate and the carrier constitute a sound cavity. A microphone and a measuring module are arranged in the sound cavity. The measuring module is connected to the microphone, so that the microphone can collect the number of sound waves from raindrops falling on the supporting thin plate, and count them through the measuring module. The rainfall can be calculated according to the number and volume of raindrops. Compared with the rainfall sensor shown in the background technology, its structure is simple, and it does not belong to intermittent measurement. It can be suitable for rainfall observation work with different rainfall amounts and has good practicality.

[0039] Combination Figure 1 The carrier 1 of the embodiment of the present invention can be in the shape of a tube that penetrates from top to bottom. Of course, it can also be in the shape of a square, etc. The embodiment of the present invention does not limit this.

[0040] Figure 2 for Figure 1 The schematic diagram of the funnel structure in Figure 1 as well as Figure 2 The funnel 2 in the embodiment of the present invention comprises a first funnel 2.1, a second funnel 2.2 and a third funnel 2.3, wherein the first funnel 2.1 is in the shape of a truncated cone with a thick top and a thin bottom, a plurality of needle tubes are arranged at the bottom of the first funnel 2.1, and the plurality of needle tubes at the bottom of the first funnel 2.1 are arranged at equal angles around the central axis of the first funnel 2.1, and the second funnel 2.2 is in the shape of a column, and the second funnel 2.2 is coaxially fixedly arranged at the bottom of the first funnel 2.1, and the second funnel 2.2 is arranged at the bottom of the first funnel 2.1. Between the multiple needle tubes 3 at the bottom of the funnel 2.1, the bottom of the second funnel 2.2 is also provided with multiple needle tubes 3, and the multiple needle tubes 3 at the bottom of the second funnel 2.2 are arranged at equal angles around the central axis of the second funnel 2.2. The third funnel 2.3 is columnar, and the third funnel 2.3 is coaxially fixedly arranged at the bottom of the second funnel 2.2. The third funnel 2.3 is arranged between the multiple needle tubes 3 at the bottom of the second funnel 2.2, and a needle tube 3 is arranged in the middle of the bottom of the third funnel 2.3. That is, the funnels of the embodiment of the present invention are arranged in a stepped manner, which can adapt to the test of rainfall of different sizes, specifically:

[0041] 1. When the rainfall is small and the water level of the collected rainwater is lower than the top surface of the third funnel 2.3, the rainwater is collected in the third funnel 2.3 and discharged through the needle tube 3 at the bottom of the third funnel 2.3 to form a group of raindrops;

[0042] 2. When the water level of the collected rainwater is lower than the top surface of the second funnel 2.2, the rainwater is collected in the second funnel 2.2 and the third funnel 2.3, and discharged through the needle tube 3 at the bottom of the second funnel 2.2 and the needle tube 3 at the bottom of the third funnel 2.3, forming multiple groups of raindrops;

[0043] 3. When the water level of the collected rainwater is lower than the top surface of the first funnel 2.1, the rainwater is collected in the first funnel 2.1, the second funnel 2.2 and the third funnel 2.3, and is discharged through the needle tube at the bottom of the first funnel 2.1, the needle tube 3 at the bottom of the second funnel 2.2 and the needle tube 3 at the bottom of the third funnel 2.3, forming more groups of raindrops.

[0044] It should be noted that the funnel in the embodiment of the present invention has three steps. Of course, it can also be appropriately deformed to form more steps, and the embodiment of the present invention is not limited to this.

[0045] Furthermore, in the embodiment of the present invention, a first filter screen 9 is provided at the top of the first funnel 2.1, and a second filter screen 10 is provided inside the first funnel 2.1. The filter diameter of the second filter screen 10 is smaller than the filter diameter of the first filter screen 9. The second filter screen 10 is in a cone shape coaxial with the first funnel 2.1, and the top of the second filter screen 10 is fixedly provided on the top of the first funnel 2.1. In this way, the rainwater can be double filtered to prevent external impurities from entering the carrier 1 and affecting the normal formation of raindrops.

[0046] For the embodiment of the present invention, the first filter screen 9 may be a 10-mesh stainless steel screen, and the first filter screen 10 may be a 50-mesh stainless steel screen.

[0047] Furthermore, the diameter of the needle tube in the embodiment of the present invention is 3 mm, and the maximum water droplet diameter that can be formed is 5 mm. When the water droplet is formed to a diameter of 5 mm, it freely falls onto the supporting thin plate 4 and is discharged from the carrier 1 from the water outlet 8.

[0048] Combination Figure 1 In the embodiment of the present invention, the lower edge of the water outlet 8 is flush with the upper edge of the supporting thin plate 4, and a water outlet pipe 11 is arranged in the water outlet 8. The water outlet pipe 11 is located on the outside of the carrier 1, that is, raindrops can be discharged from the carrier 1 through the water outlet pipe 11.

[0049] Furthermore, combined with Figure 1In an embodiment of the present invention, a sponge 12 may be provided on the supporting sheet 4, and the sponge 12 is provided at the entrance of the water outlet 8. In this way, it can prevent foreign debris (such as moths, etc.) from entering the carrier 1 through the water outlet 8 and affecting the normal measurement without hindering the discharge of raindrops from the carrier 1.

[0050] Combination Figure 1 In the embodiment of the present invention, an annular bracket 13 is fixedly disposed inside the carrier 1 , and the supporting thin plate 4 is fixedly disposed on the annular bracket 13 , that is, the annular bracket 13 can be fixed inside the carrier 1 , and the supporting thin plate 4 is placed on the annular bracket 13 .

[0051] The supporting sheet 6 of the embodiment of the present invention can be a polyvinyl chloride film with a thickness of 0.2 mm. Rainwater forms drops at the needle tip of the needle tube 3 and impacts the supporting sheet 6 below to generate sound waves. The pickup 8 collects the sound wave signal of the supporting sheet. The core of the measuring module 9 is the c8051f340 single-chip microcomputer. The measuring module 9 analyzes the sound wave signal to count the drops, and calculates the rainfall according to the number and volume of the drops, specifically:

[0052] If the diameter of each water drop is 5 mm, and the water drop falls freely when the diameter reaches 5 mm, and the length of the needle tube 3 is adjusted so that the needle produces 2 water drops per second, the maximum measured rainfall is 150 mmh-1, and the rainfall is calculated as follows:

[0053] Volume of each raindrop = 4 / 3*3.14*2.5mm*2.5mm*2.5mm=65mm 3 ;

[0054] Total volume of raindrops per hour = 65 mm 3 *2*10*3600=4680000mm 3 h -1 ;

[0055] Converted to diameter 200mm depth = 4680000 / 3.14 / 100 / 100 = 150mmh -1 .

[0056] The beneficial effects of the technical solution provided by this implementation example are: using a stepped funnel and a needle tube to convert rainwater into droplets, and detecting the number of droplets by sound, to achieve digital continuous measurement of rainfall, with the characteristics of good real-time performance, high precision and simple structure.

[0057] Embodiment 2:

[0058] The difference between the second embodiment and the first embodiment is that:

[0059] Figure 3 A droplet type rain sensor diagram of the second embodiment of the present invention is shown in FIG. Figure 3In the second embodiment, the pickup in the first embodiment is eliminated, and a plurality of photoelectric tubes 14 are provided. Figure 4 for Figure 3 The schematic diagram of the arrangement of the photoelectric tube, combined with Figure 4 In the embodiment of the present invention, the photoelectric tubes 14 and the needle tubes 3 are arranged in one-to-one correspondence, each photoelectric tube 14 is fixedly arranged directly below the corresponding needle tube 3, and the measuring module 7 is connected to the photoelectric tubes 14.

[0060] In the second embodiment, since the photoelectric tubes and the needle tubes are arranged in a one-to-one correspondence, each photoelectric tube is fixedly arranged directly below the corresponding needle tube. When raindrops are discharged from the needle tube and pass through the transmitting tube and the receiving tube of the corresponding photoelectric tube, the photoelectric tube is turned on and off once, and the measuring module counts the on and off times. The rainfall can be calculated based on the number and volume of raindrops. Compared with the rainfall sensor shown in the background technology, its structure is simple, and it does not belong to intermittent measurement. It can be suitable for rainfall observation work with different rainfall amounts and has good practicality.

[0061] The following embodiments are preferred implementation modes of the present invention and are only used to facilitate the description of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field may make equivalent embodiments using partial changes or modifications made to the technical contents disclosed in the present invention without departing from the scope of the technical features of the present invention, and they shall still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A droplet type rain sensor, characterized in that: The droplet type rain sensor comprises: A carrier, wherein the carrier is vertically arranged through-through; A funnel, wherein the funnel is arranged at the top of the carrier, and a plurality of water outlet holes are arranged at the bottom of the funnel; A needle tube, wherein a plurality of needle tubes are provided, and the needle tubes and the water outlet holes are provided in one-to-one correspondence, and the needle tubes are fixedly provided vertically at the lower side of the corresponding water outlet hole, and the needle tubes are communicated with the corresponding water outlet hole; A supporting thin plate, the supporting thin plate is fixedly arranged in the carrier, the supporting thin plate is located below the plurality of needle tubes, a water outlet for draining rainwater falling on the supporting thin plate is arranged on the peripheral surface of the carrier, and the supporting thin plate is a polyvinyl chloride film with a thickness of 0.2 mm; A closing plate, the closing plate is fixedly arranged at the lower part of the carrier, the closing plate, the supporting thin plate and the carrier form an acoustic cavity, a pickup and a measuring module are arranged in the acoustic cavity, and the measuring module is connected to the pickup; The funnel comprises: A first funnel, the first funnel is in the shape of a truncated cone with a thick top and a thin bottom, a plurality of needle tubes are arranged at the bottom of the first funnel, and the plurality of needle tubes at the bottom of the first funnel are arranged at equal angles around the central axis of the first funnel; A second funnel, the second funnel is columnar, the second funnel is coaxially fixedly arranged at the bottom of the first funnel, the second funnel is arranged between the plurality of needle tubes at the bottom of the first funnel, a plurality of needle tubes are arranged at the bottom of the second funnel, and the plurality of needle tubes at the bottom of the second funnel are arranged at equal angles around the central axis of the second funnel; The third funnel is columnar and coaxially fixed at the bottom of the second funnel. The third funnel is arranged between the plurality of needle tubes at the bottom of the second funnel, and a needle tube is arranged in the middle of the bottom of the third funnel.

2. The droplet type rain sensor according to claim 1, characterized in that: A first filter is arranged on the top of the first funnel, a second filter is arranged inside the first funnel, the filter diameter of the second filter is smaller than the filter diameter of the first filter, the second filter is in a cone shape coaxial with the first funnel, and the top of the second filter is fixedly arranged on the top of the first funnel.

3. The droplet type rain sensor according to any one of claims 1 to 2, characterized in that: The diameter of the needle tube is 3 mm.

4. The droplet type rain sensor according to any one of claims 1 to 2, characterized in that: The lower edge of the water outlet is flush with the upper edge of the supporting thin plate, and a water outlet pipe is arranged in the water outlet, and the water outlet pipe is located outside the carrier.

5. The droplet type rain sensor according to claim 4, characterized in that: A sponge is arranged on the supporting thin plate, and the sponge is arranged at the entrance of the water outlet.

6. The droplet type rain sensor according to any one of claims 1-2, characterized in that: An annular bracket is fixedly arranged in the carrier, and the supporting thin plate is fixedly arranged on the annular bracket.

7. A droplet type rain sensor, characterized in that: The droplet type rain sensor comprises: A carrier, wherein the carrier is vertically arranged through-through; A funnel, wherein the funnel is arranged at the top of the carrier, and a plurality of water outlet holes are arranged at the bottom of the funnel; A needle tube, wherein a plurality of needle tubes are provided, and the needle tubes and the water outlet holes are provided in one-to-one correspondence, and the needle tubes are fixedly provided vertically at the lower side of the corresponding water outlet hole, and the needle tubes are communicated with the corresponding water outlet hole; Photoelectric tubes, the photoelectric tubes and the needle tubes are arranged in one-to-one correspondence, and each of the photoelectric tubes is fixedly arranged directly below the corresponding needle tube; A measuring module, the measuring module is connected to the photoelectric tube; The funnel comprises: A first funnel, the first funnel is in the shape of a truncated cone with a thick top and a thin bottom, a plurality of needle tubes are arranged at the bottom of the first funnel, and the plurality of needle tubes at the bottom of the first funnel are arranged at equal angles around the central axis of the first funnel; A second funnel, the second funnel is columnar, the second funnel is coaxially fixedly arranged at the bottom of the first funnel, the second funnel is arranged between the plurality of needle tubes at the bottom of the first funnel, a plurality of needle tubes are arranged at the bottom of the second funnel, and the plurality of needle tubes at the bottom of the second funnel are arranged at equal angles around the central axis of the second funnel; The third funnel is columnar and coaxially fixed at the bottom of the second funnel. The third funnel is arranged between the plurality of needle tubes at the bottom of the second funnel, and a needle tube is arranged in the middle of the bottom of the third funnel.

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