CN212008991U

CN212008991U - Arc-shaped radiation shield for meteorological measurement

Info

Publication number: CN212008991U
Application number: CN202020267052.6U
Authority: CN
Inventors: 杨杰; 陈高颖; 刘清惓; 丁枫; 袁宇
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Jiangsu tongjinyuan Technology Co.,Ltd.
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-11-24
Anticipated expiration: 2030-03-06

Abstract

The utility model discloses a convex meteorological measurement is with protecting against radiation cover, including first hemisphere and the second hemisphere that sets up directly over the first hemisphere, the plane level of first hemisphere and second hemisphere, sphere are relative, and the interval sets up, the side between first hemisphere and the second hemisphere is equipped with the guide plate, and the side of this guide plate between first hemisphere and second hemisphere is even the interval sets up a plurality ofly, and two adjacent guide plates form the air pipe that the outer opening is big with the sphere of first hemisphere, second hemisphere, and the interior limit of four guide plates forms side open-ended central channel; and a temperature sensor probe is arranged in the central channel. The radiation-proof cover of the design is provided with a plurality of ventilation pipelines, the circular arc-shaped structure of the ventilation pipelines has a certain flow guiding effect, and the air velocity around the temperature sensor is increased while the solar radiation is effectively reduced.

Description

Arc-shaped radiation shield for meteorological measurement

Technical Field

The utility model belongs to the technical field of meteorological instrument technique and specifically relates to a convex meteorological measurement is with radiation protection cover is related to.

Background

In the daytime, the solar radiation causes the temperature sensor of the meteorological station to be heated, so that the observed value of the temperature sensor is higher than the air temperature of the surrounding environment, and the error caused by the phenomenon is called solar radiation error. At present, a shutter box or a natural ventilation radiation-proof cover for a meteorological station can prevent a temperature sensor probe from being directly radiated by the sun, and radiation errors are reduced. However, since the white coating on the outer surface of the louver or the radiation shield is difficult to reflect solar radiation in a hundred percent, to a certain extent, the conventional louver or the radiation shield, especially the blades and the ring plates thereof, still generates significant radiation temperature rise, so that the airflow flowing into the louver or the radiation shield is heated, and the observation result of the probe of the internal temperature sensor is higher than the temperature of the external free air. In addition, the blades and the ring plate are not favorable for air flow circulation, and the radiation error is further increased due to low air flow speed inside the louver box or the radiation shield. It is generally believed that a reduction in the air flow velocity inside the shield is accompanied by a thermal pollution effect. Because gaps are formed between the blades of the louver box and the ring piece of the radiation shield, a certain proportion of solar direct radiation, scattered radiation and ground reflected radiation always enter the instrument from the gaps and irradiate the surface of the temperature sensor probe, and the radiation error is further enlarged due to the effect. The radiation error of the temperature sensor using the traditional louver box and the radiation-proof cover can reach 1 ℃ or even higher. The blades of the louver box and the ring blades of the radiation-proof cover not only cause the problem of radiation errors, but also reduce the response speed of the temperature sensor probe and cause hysteresis errors, and the hysteresis of the wooden louver box can reach more than 10 minutes. In addition, the thermal capacities of the louver box and the radiation-proof cover are large, so that great difficulty is brought to temperature pulsation observation. A good radiation shield design for meteorological measurements should not only minimize the solar radiation reaching the surface of the temperature sensor probe, but also maximize the air flow velocity around the temperature sensor probe within the radiation shield. The use of vanes or rings helps to meet the first requirement, but it is difficult to meet the second requirement and thus to eliminate the effect of thermal pollution. Therefore, the two design requirements are difficult to be unified, which brings difficulty to the improvement of the performance of the radiation shield.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the not enough of background art, the utility model discloses an improve convex meteorological measurement of temperature measurement accuracy and use radiation shield.

The technical scheme is as follows: the utility model discloses a convex meteorological measurement is with protecting against radiation cover, including first hemisphere and the second hemisphere that sets up directly over the first hemisphere, the plane level of first hemisphere and second hemisphere, sphere are relative, and the interval sets up, the side between first hemisphere and the second hemisphere is equipped with the guide plate, the guide plate is perpendicular with the plane of first hemisphere, and the center of first hemisphere sphere is located the guide plate place plane, the upper and lower limit of guide plate respectively with the second hemisphere, the seamless concatenation of the sphere of first hemisphere, the interior limit of guide plate is no longer than the center of first hemisphere sphere, the side of guide plate between first hemisphere and second hemisphere is even the interval sets up a plurality ofly, two adjacent guide plates form the air pipe that the outer lane is big with the sphere of first hemisphere, second hemisphere, the interior lane is little, the inner edges of the four guide plates form a central channel with an opening at the side edge; and a temperature sensor probe is arranged in the central channel.

Furthermore, the outer edge of the guide plate is perpendicular to the plane of the first hemisphere, and two ends of the guide plate are respectively connected with the edges of the plane of the first hemisphere and the plane of the second hemisphere.

Furthermore, the number of the guide plates is four or more than four.

Furthermore, the temperature sensor probe is arranged at the center of the central channel and fixed at the center of the spherical surface of the first hemisphere through the heat insulation column.

Furthermore, the planes of the first hemisphere and the second hemisphere are plated with reflective materials.

Further, the reflecting material is silver, nickel, aluminum or other high-reflecting materials.

Has the advantages that: compared with the prior art, the utility model has the advantages that: the radiation shield of the design forms a plurality of ventilation pipelines in all directions, the airflow inlet is large, the outlet is small, at least 1 ventilation pipeline can sense external airflow in real time under any horizontal wind direction, the ventilation pipeline has relatively good ventilation, meanwhile, the inner wall of the ventilation pipeline is smooth, the upper inner wall and the lower inner wall of the ventilation pipeline are arc-shaped, the horizontal low-angle airflow can be guided to enter the ventilation pipeline, the airflow sensed by the temperature sensor in the radiation shield is continuously updated, the measured temperature has good timeliness, meanwhile, the horizontal low-angle solar radiation can be reflected, and the solar radiation is prevented from entering the radiation shield, so that the radiation error is reduced; and secondly, the reflective materials at the top and the bottom can effectively reduce the temperature rise of the radiation-proof cover caused by direct radiation of the sun, and simultaneously can reduce the reflected radiation from the underlying surface and prevent secondary radiation heat pollution.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a front view of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

The radiation protection cover for the circular arc meteorological measurement as shown in fig. 1 and fig. 2 comprises a first hemisphere 1 and a second hemisphere 2 arranged right above the first hemisphere 1, wherein the planes of the first hemisphere 1 and the second hemisphere 2 are horizontal and opposite in spherical surface, and are arranged at intervals, a guide plate 3 is arranged on the side edge between the first hemisphere 1 and the second hemisphere 2, the guide plate 3 is perpendicular to the plane of the first hemisphere 1, the center of the spherical surface of the first hemisphere 1 is located on the plane of the guide plate 3, the upper side and the lower side of the guide plate 3 are respectively seamlessly spliced with the spherical surfaces of the second hemisphere 2 and the first hemisphere 1, the inner edge 301 of the guide plate 3 is not more than the center of the spherical surface of the first hemisphere 1, a plurality of guide plates 3 are uniformly arranged at intervals on the side edges between the first hemisphere 1 and the second hemisphere 2, and two adjacent guide plates 3 are seamlessly spliced with the spherical surface of the first hemisphere 1, The spherical surface of the second hemispheroid 2 forms a ventilation pipeline with a large outer opening and a small inner opening, and the inner edges 301 of the four guide plates 3 form a central channel with an opening at the side edge; and a temperature sensor probe 4 is arranged in the central channel.

This design forms air pipe all around the radiation protection cover, and per 2 guide plates 3 and radiation protection cover upper and lower circular arc inner walls constitute 1 air pipe, and whole air pipe air current entry is big, the export is little, the internal surface is smooth, and under arbitrary horizontal wind direction, always there is 1 at least air pipe perception air current that can be real-time, and this air pipe has good ventilation relatively. The circular-arc inner wall structure of the ventilation pipeline can guide horizontal low-angle airflow to enter the ventilation pipeline, the airflow sensed by the temperature sensor in the radiation shield is continuously updated, the measured temperature has good timeliness, meanwhile, the horizontal low-angle solar radiation can be reflected, the solar radiation is prevented from entering the radiation shield, radiation errors are reduced, and the arc downward-inclined channel is not prone to accumulation of deposits such as leaves, dust and snow, and the maintenance cost of the radiation shield can be effectively reduced.

The outer edge 302 of the guide plate 3 is perpendicular to the plane of the first hemisphere 1, and two ends of the guide plate are respectively connected with the plane edges of the first hemisphere 1 and the second hemisphere 2.

The guide plate 3 is provided with four or more than four even number, and the embodiment adopts four guide plates, so that four ventilating ducts with 90-degree angles are formed around the radiation shield.

The temperature sensor probe 4 is arranged at the center of the central channel and fixed at the spherical center of the first hemisphere 1 through a heat insulation column. Even if the temperature of the inner wall of the ventilation pipeline is increased by the direct solar radiation, the scattered radiation, the reflected radiation and the heat conduction effect in the daytime, although the air flow around the inner wall of the pipeline is heated by the pipe wall with probability, the air flow can flow along the inner side of the pipeline, the central position of a channel where a temperature sensor probe is positioned is difficult to be polluted by the secondary radiation heat of the heated air flow, and similarly, even if the temperature of the pipe wall of the ventilation pipeline is reduced at night, the low-temperature air flow in the ventilation pipeline generally flows along the inner wall of the pipeline, so that the radiation heat pollution can be avoided to a certain extent, and.

The plane of the first hemisphere 1 and the plane of the second hemisphere 2 are plated with reflective materials, the reflective materials are silver, nickel, aluminum or other high-reflection materials, radiation temperature rise caused by direct radiation of the sun above can be effectively reduced, radiation errors are reduced, meanwhile, reflection radiation from the underlying surface can be reduced, and secondary radiation heat pollution is prevented.

Through simulation experiment verification, under the same environmental condition, the utility model relates to a convex radiation protection cover can reduce temperature sensor's radiation error to 0.05 degree of grade, and uses traditional shutter box and natural draft radiation protection cover's temperature sensor radiation error to reach 1 degree of grade, and is visible, and the convex radiation protection cover that this application relates to has reduced radiation error. Compare with blade type shutter box and ring piece formula radiation shield, the utility model relates to a convex radiation shield is covered volume less, weight is less, reduce cost, and the structure is simple relatively, easily manufacturing, maintenance installation and cleanness, and a plurality of air pipe's design makes radiation shield still can normally work under the condition that air pipe damaged or plugged up, and radiation shield's reliability is high.

Claims

1. The utility model provides a convex meteorological measurement is with protecting against radiation cover which characterized in that: comprises a first hemisphere (1) and a second hemisphere (2) arranged right above the first hemisphere (1), wherein the planes of the first hemisphere (1) and the second hemisphere (2) are horizontal and opposite in spherical surface, and are arranged at intervals, a guide plate (3) is arranged on one side between the first hemisphere (1) and the second hemisphere (2), the guide plate (3) is vertical to the plane of the first hemisphere (1), the center of the spherical surface of the first hemisphere (1) is positioned on the plane of the guide plate (3), the upper side and the lower side of the guide plate (3) are respectively spliced with the spherical surfaces of the second hemisphere (2) and the first hemisphere (1) in a seamless manner, the inner side (301) of the guide plate (3) is not more than the center of the spherical surface of the first hemisphere (1), and a plurality of guide plates (3) are uniformly arranged at intervals on one side between the first hemisphere (1) and the second hemisphere (2), the two adjacent guide plates (3) and the spherical surfaces of the first hemispheroid (1) and the second hemispheroid (2) form a ventilation pipeline with a large outer opening and a small inner opening, and the inner edges (301) of the four guide plates (3) form a central channel with an opening at the side edge; and a temperature sensor probe (4) is arranged in the central channel.

2. The radiation shield for circular arc meteorological measurement according to claim 1, wherein: the outer edge (302) of the guide plate (3) is perpendicular to the plane of the first hemisphere (1), and two ends of the guide plate are respectively connected with the edges of the planes of the first hemisphere (1) and the second hemisphere (2).

3. The radiation shield for circular arc meteorological measurement according to claim 1, wherein: the guide plates (3) are provided with four or more than four even numbers.

4. The radiation shield for circular arc meteorological measurement according to claim 1, wherein: the temperature sensor probe (4) is arranged at the center of the central channel and fixed at the spherical center of the first hemisphere (1) through the heat insulation column.

5. The radiation shield for circular arc meteorological measurement according to claim 1, wherein: the planes of the first hemisphere (1) and the second hemisphere (2) are plated with reflective materials.

6. The radiation shield for circular arc meteorological measurement according to claim 5, wherein: the reflective material is silver, nickel or aluminum.