CN214335272U

CN214335272U - Optical rain gauge

Info

Publication number: CN214335272U
Application number: CN202120507605.5U
Authority: CN
Inventors: 杨垒; 张朝; 周在伟; 种壮壮; 李超
Original assignee: Shandong Renke Measurement And Control Technology Co ltd
Current assignee: Shandong Renke Measurement And Control Technology Co ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-10-01
Anticipated expiration: 2031-03-10

Abstract

The utility model relates to a precipitation measuring instrument field has solved among the prior art problem that only two light process's banded region can detect the raindrop on light guide housing surface. Optical rain gauge, including leaded light cover and base, leaded light cover can dismantle with the base and be connected, is equipped with the circuit board on the base, is equipped with a plurality of pointolite and one or more detection module that correspond with the pointolite on the circuit board, is equipped with annular round platform on the leaded light cover, is equipped with convex lens between pointolite and the round platform, and the pointolite is located convex lens's focus. The outer wall of the light guide cover is streamline. The light emitted by the intensive point light source is totally reflected on the interface of the light guide cover and the air, so that the total reflection of the light can be damaged no matter which part of the light guide cover the rainwater falls on, and the illumination received by the detection module is weakened. The phenomenon that the raindrops fall on the light guide cover in a non-detection area to cause that the detection module cannot detect the raindrops is avoided, so that the detection is inaccurate, and the measurement accuracy is improved.

Description

Optical rain gauge

Technical Field

The utility model relates to a precipitation measuring instrument field especially relates to an optics rain gauge.

Background

The optical rain gauge is a hydrological and meteorological instrument for measuring the rainfall of the nature and converting the rainfall into digital information quantity expressed in the form of switching value to be output so as to meet the requirements of information transmission, processing, recording and display. The utility model discloses an application number is CN 201510317539.4's utility model patent discloses an optics rainfall detection device, have that electronic component seals, extra small volume, super high sensitivity and strong interference killing feature, inside no mechanical part, no mechanical wear is sturdy and durable, does not have exposed part, avoids inside contact aqueous vapor to corrode, can not influence the detection of rainfall because of fallen leaves or other debris, and the device is very sensitive to small raindrop, the advantage of the very little rainfall phenomenon of detectable. However, the raindrops can be detected only in the strip-shaped area through which two light rays pass on the surface of the light guide cover due to the adoption of the two groups of light sources and the two groups of sensors, and the raindrops cannot be detected by the rest parts, so that the measuring result is inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model provides an optical rain gauge has solved among the prior art problem that only two light can detect the raindrop in the banded region of light guide cover surface process.

Optical rain gauge, including leaded light cover and base, leaded light cover can dismantle with the base and be connected, is equipped with the circuit board on the base, is equipped with a plurality of pointolite and one or more detection module that correspond with the pointolite on the circuit board, is equipped with annular round platform on the leaded light cover, is equipped with convex lens between pointolite and the round platform, and the pointolite is located convex lens's focus. The outer wall of the light guide cover is streamline. The light guide cover is made of acrylic. When the utility model is used, the divergent light emitted by the point light sources is changed into parallel light after being refracted by the convex lens, and is emitted into the circular truncated cone perpendicular to the bottom surface of the circular truncated cone; the light emitted by the intensive point light sources is totally reflected on the interface of the light guide cover and the air, so that the total reflection of the light can be damaged no matter which part of the rainwater falls on the light guide cover (the part above the bottom surface of the circular truncated cone), and the light received by the detection module is weakened. The phenomenon that the raindrops fall on the light guide cover in a non-detection area to cause that the detection module cannot detect the raindrops is avoided, so that the detection is inaccurate, and the measurement accuracy is improved.

Furthermore, the point light sources are arranged in a semi-annular shape, and the detection modules are arranged in a semi-annular shape.

Furthermore, one surface of the convex lens is a spherical surface, the other surface of the convex lens is a plane, and the convex lens and the light guide cover are integrally formed. The relative position of the convex lens and the light guide cover does not need to be adjusted during installation, and the installation steps are simplified.

Further, be equipped with cylindric lens holder on the leaded light cover, convex lens are located inside the lens holder, and the both sides of convex lens are equipped with the rubber circle, and the rubber circle is fixed convex lens in the lens holder. The distance from the convex lens to the point light source can be adjusted by adjusting the position of the rubber ring, so that the point light source is positioned on the focus of the convex lens.

Further, the point light source includes a light emitting diode, and the detection module includes a photodiode.

Further, the light guide cover is provided with an internal thread, the base is provided with an external thread, the light guide cover is in threaded connection with the base, the light guide cover is provided with a limiting rod, the circuit board is provided with a through hole, the limiting rod penetrates through the through hole, and the light emitting diode is located on the axis of the lens holder. The limiting rod penetrates through the through hole to ensure that the relative position of the light guide cover and the circuit board is correct, so that the point light source is located on the optical axis of the convex lens.

Further, the one detection module is shaped as a half ring. Under the existing process conditions, the photodiode can be made into a semicircular shape, and the photodiode can still play a role when being in the semicircular shape.

Furthermore, a point light source is arranged on the circuit board, and a semi-circular light diffusion sheet is arranged between the point light source and the convex lens. The light diffusion sheet enables the light emitted by the point light sources to be uniformly distributed in the semi-annular area, and the number of the point light sources is saved.

Furthermore, the plurality of point light sources are distributed on the circuit board in an annular shape, the detection module comprises at least three photodiodes, the photodiodes are arranged at the central vertex of the light guide cover, and the working surfaces of the photodiodes face the periphery to form a circle and are used for receiving infrared rays emitted by the point light sources.

Furthermore, the light guide cover comprises an arch-shaped plate and two side plates positioned at two ends of the arch-shaped plate, the point light sources are arranged in a row at one side of the arch-shaped plate, and the detection modules are arranged in a row at the other side of the arch-shaped plate.

According to the technical scheme, the utility model has the advantages of it is following:

divergent light emitted by the point light sources is converted into parallel light after being refracted by the convex lens, and the parallel light is perpendicular to the bottom surface of the circular truncated cone and enters the circular truncated cone; the light emitted by the intensive point light sources is totally reflected on the interface of the light guide cover and the air, so that the total reflection of the light can be damaged no matter which part of the rainwater falls on the light guide cover (the part above the bottom surface of the circular truncated cone), and the light received by the detection module is weakened. The phenomenon that the raindrops fall on the light guide cover in a non-detection area to cause that the detection module cannot detect the raindrops is avoided, so that the detection is inaccurate, and the measurement accuracy is improved.

Drawings

In order to illustrate the technical solution of the present invention more clearly, the drawings that are needed in the description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

Fig. 1 is a cross-sectional view of embodiment 1 of the present invention.

Fig. 2 is a schematic view of the distribution of the point light sources and the detection modules according to embodiment 1 of the present invention.

Fig. 3 is a cross-sectional view of the light guide cover according to embodiment 2 of the present invention.

Fig. 4 is a schematic distribution diagram of the point light sources and the detection modules according to embodiment 3 of the present invention.

Fig. 5 is a schematic distribution diagram of a light diffusion sheet and a detection module in embodiment 4 of the present invention.

Fig. 6 is a cross-sectional view of embodiment 5 of the present invention.

Fig. 7 is a schematic view of a light guide cover structure according to embodiment 6 of the present invention.

Fig. 8 is a cross-sectional view of a light guide cover according to embodiment 6 of the present invention.

1. Light guide cover, 2, base, 3, circuit board, 4, pointolite, 5, detection module, 6, round platform, 7, convex lens, 8, lens holder, 9, rubber circle, 10, gag lever post, 11, curb plate, 12, arch-shaped board, 13, light diffusion piece.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the embodiments described below are only some embodiments, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given in the present patent without making any creative effort, shall fall within the scope of protection of the present patent.

Example 1

As shown in fig. 1 and 2, the optical rain gauge comprises a light guide cover 1 and a base 2, the light guide cover 1 is detachably connected with the base 2, a circuit board 3 is arranged on the base 2, a plurality of light emitting diode point light sources 4 and one or more photodiode detection modules 5 corresponding to the point light sources 4 are arranged on the circuit board 3, an annular round table 6 is arranged on the light guide cover 1, a convex lens 7 is arranged between the point light sources 4 and the round table 6, and the point light sources 4 are located at the focus of the convex lens 7. The outer wall of the light guide cover 1 is streamline. The light guide cover 1 is made of acryl. When the utility model is used, the divergent light emitted by the plurality of point light sources 4 is changed into parallel light after being refracted by the convex lens 7, and is emitted into the circular truncated cone 6 perpendicular to the bottom surface of the circular truncated cone 6; the light emitted by the intensive point light sources 4 is totally reflected on the interface between the light guide cover 1 and the air, so that the total reflection of the light can be damaged no matter which part of the rainwater falls on the light guide cover 1 (the part above the bottom surface of the circular truncated cone 6), and the illumination received by the detection module 5 is weakened. The phenomenon that the raindrops fall on the light guide cover 1 in a non-detection area to cause the detection module 5 to be incapable of detecting the raindrops and cause inaccurate detection is avoided, and the accuracy of measurement is improved.

The plurality of point light sources 4 are arranged in a semi-ring shape, and the plurality of detection modules 5 are arranged in a semi-ring shape. The light guide cover 1 is provided with a cylindrical lens frame 8, the convex lens 7 is positioned inside the lens frame 8, rubber rings 9 are arranged on two sides of the convex lens 7, and the convex lens 7 is fixed in the lens frame 8 through the rubber rings 9. The distance from the convex lens 7 to the point light source 4 can be adjusted by adjusting the position of the rubber ring 9 so that the point light source 4 is located at the focal point of the convex lens 7. Be equipped with the internal thread on stating light guide cover 1, be equipped with the external screw thread on the base 2,

light guide cover

1 and 2 threaded connection of base, be equipped with gag lever post 10 on the light guide cover 1, be equipped with the through-hole on the circuit board 3, gag lever post 10 passes the through-hole, emitting diode is located the axis of lens holder 8. The limiting rod 10 penetrates through the through hole to ensure that the relative position of the light guide cover 1 and the circuit board 3 is correct, so that the point light source 4 is positioned on the optical axis of the convex lens 7.

Example 2

As shown in fig. 3, the present embodiment is different from embodiment 1 in that one surface of the convex lens 7 is a spherical surface and the other surface is a flat surface, and the convex lens 7 is integrally formed with the light guide cover 1. The relative position of the convex lens 7 and the light guide cover 1 does not need to be adjusted during installation, and the installation steps are simplified.

Example 3

As shown in fig. 4, the present embodiment is different from embodiment 1 in that one detection module 5 is shaped like a half ring. Under the existing process conditions, the photodiode can be made into a semicircular shape, and the photodiode can still play a role when being in the semicircular shape.

Example 4

As shown in fig. 5, the present embodiment is different from embodiment 1 in that a point light source 4 is provided on a circuit board 3, and a semi-circular light diffusion sheet 13 is provided between the point light source 4 and a convex lens 7. The light diffusion sheet 13 uniformly distributes the light emitted from the point light sources 4 in the semi-annular region, saving the number of the point light sources 4.

Example 5

As shown in fig. 6, the present embodiment is different from embodiment 1 in that a plurality of point light sources 4 are distributed on a circuit board 3 in a ring shape, the detection module 5 includes at least three photodiodes, the photodiodes are disposed at the central vertex of the light guide cover 1, and the working surfaces of the photodiodes are arranged in a circle facing the periphery for receiving the infrared rays emitted by the point light sources 4.

Example 6

As shown in fig. 7 and 8, the present embodiment is different from embodiment 1 in that the light guide housing 1 includes a dome plate 12 and two side plates 11 at both ends of the dome plate 12, the point light sources 4 are aligned at one side of the dome plate 12, and the detection modules 5 are aligned at the other side of the dome plate 12.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Optical rain gauge, a serial communication port, including leaded light cover (1) and base (2), leaded light cover (1) can be dismantled with base (2) and be connected, be equipped with circuit board (3) on base (2), be equipped with a plurality of pointolite (4) and one or more detection module (5) that correspond with pointolite (4) on circuit board (3), be equipped with annular round platform (6) on leaded light cover (1), be equipped with between pointolite (4) and round platform (6) convex lens (7), pointolite (4) are located the focus of convex lens (7).

2. The optical rain gauge according to claim 1, wherein the plurality of point light sources (4) are arranged in a semi-circular shape, and the plurality of detection modules (5) are arranged in a semi-circular shape.

3. The optical rain gauge according to claim 2, wherein one surface of the convex lens (7) is a spherical surface and the other surface is a flat surface, and the convex lens (7) is integrally formed with the light guide cover (1).

4. The optical rain gauge according to claim 2, characterized in that the light guide cover (1) is provided with a cylindrical lens holder (8), the convex lens (7) is located inside the lens holder (8), rubber rings (9) are provided on both sides of the convex lens (7), and the rubber rings (9) fix the convex lens (7) inside the lens holder (8).

5. Optical rain gauge according to claim 2 or 3, characterized in that the point light source (4) comprises a light emitting diode and the detection module (5) comprises a photodiode.

6. The optical rain gauge according to claim 5, wherein the light guide cover (1) is provided with an internal thread, the base (2) is provided with an external thread, the light guide cover (1) is in threaded connection with the base (2), the light guide cover (1) is provided with a limiting rod (10), the circuit board (3) is provided with a through hole, the limiting rod (10) passes through the through hole, and the light emitting diode is located on the axis of the lens holder (8).

7. Optical rain gauge according to claim 5, characterized in that the shape of the one detection module (5) is a half-ring.

8. The optical rain gauge according to claim 1, wherein a point light source (4) is provided on the circuit board (3), and a semi-circular light diffusion sheet (13) is provided between the point light source (4) and the convex lens (7).

9. The optical rain gauge according to claim 1, wherein the plurality of point light sources (4) are distributed in a ring shape on the circuit board (3), and the detection module (5) comprises at least three photodiodes, which are arranged at the central vertex of the light guide housing (1) and whose working surfaces are arranged in a circle toward the periphery for receiving infrared rays emitted from the point light sources (4).

10. The optical rain gauge according to claim 1, wherein the light guide housing (1) includes a dome plate (12) and two side plates (11) at both ends of the dome plate (12), the point light sources (4) are aligned at one side of the dome plate (12), and the detection modules (5) are aligned at the other side of the dome plate (12).