Dew collector for land surface moisture measurement

Abstract

The utility model provides a dew collector for land surface moisture measurement. The dew collector for land surface moisture measurement comprises an outer cylinder, a measuring cylinder is arranged in the outer cylinder, a second supporting ring is fixedly installed at the top of the measuring cylinder and located above the outer cylinder, a plurality of weighing sensors distributed in an annular mode are fixedly installed at the bottom of the second supporting ring, and the weighing sensors are arranged on the outer cylinder. A plurality of air holes are formed in the bottom of the measuring cylinder; a filter screen is placed in the measuring cylinder, and the filter screen is in contact with the inner wall of the bottom of the measuring cylinder; the top of the outer cylinder is symmetrically and fixedly provided with two pressing and pulling handles, and the outer sides of the pressing and pulling handles are sleeved with anti-skid sleeves. The outer wall of the measuring cylinder is not in contact with the inner wall of the outer cylinder. The dew collector for land surface moisture measurement provided by the utility model has the advantages that the density of soil in the measuring cylinder can be ensured to be close to the density of soil of a measured land, so that the accuracy of measured data is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lysimeters, in particular to a dew collector used for measuring land surface moisture. Background Art

[0002] In nature, whenever the land surface temperature falls below the dew point, atmospheric water vapor condenses into water droplets on the ground or on land features. This is known as land surface dew. Land surface dew is a crucial component of the land surface water balance. It evaporates directly or is absorbed by shallow soil layers, producing significant ecological and climatic effects.

[0003] For a long time, the study of dewfall has been an important scientific issue of common concern to related disciplines such as meteorology, hydrology, agronomy and ecology.

[0004] The dew observation instruments in the prior art mainly include: container-type dew meters, flat-plate dew meters, absorbent paper-type dew meters, Hiltner H balance dew meters, lysimeters, etc. However, the soil density in the measuring tube of the lysimeter in the prior art cannot be controlled, which easily leads to the measurement data being unable to better apply to the lysimeter values under natural conditions.

[0005] Therefore, it is necessary to provide a new dew collector for land surface moisture measurement to solve the above technical problems. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a dew collector for measuring land surface moisture, which can ensure that the soil density in the measuring tube is relatively close to the soil density of the measuring ground, thereby ensuring the accuracy of the measurement data.

[0007] In order to solve the above technical problems, the dew collector for land surface moisture measurement provided by the utility model includes: an outer cylinder, a measuring cylinder is provided in the outer cylinder, a second support ring is fixedly installed on the top of the measuring cylinder, the second support ring is located above the outer cylinder, and a plurality of weighing sensors distributed in a ring are fixedly installed on the bottom of the second support ring, and a plurality of air holes are opened at the bottom of the measuring cylinder.

[0008] Preferably, a filter is placed in the measuring cylinder, and the filter is in contact with the bottom inner wall of the measuring cylinder.

[0009] Preferably, two pressing and pulling handles are symmetrically fixedly mounted on the top of the outer cylinder, and the outer sides of the pressing and pulling handles are covered with anti-slip sleeves.

[0010] Preferably, the outer wall of the measuring cylinder does not contact the inner wall of the outer cylinder.

[0011] Preferably, the outer cylinder includes a bottom cylinder, a top cylinder is welded to the top of the bottom cylinder, the bottom cylinder is located below the measuring cylinder, the inner diameter of the bottom cylinder is the same as the inner diameter of the measuring cylinder, the top cylinder is sleeved on the outside of the measuring cylinder, a first support ring is provided on the top of the top cylinder, and the bottom of the weighing sensor is in contact with the top of the first support ring.

[0012] Preferably, a first annular cutting edge is provided on the bottom outer wall of the bottom tube, the bottom tube and the top tube are integrally arranged, and a second annular cutting edge is provided at the connection between the outer walls of the bottom tube and the top tube.

[0013] Preferably, a first scale is provided on the inner wall of the measuring cylinder, and a second scale is provided on the outer wall of the outer cylinder, and the first scale is matched with the second scale.

[0014] Compared with related technologies, the dew collector for land surface moisture measurement provided by the present invention has the following beneficial effects:

[0015] The utility model provides a dew collector for measuring land surface moisture. Through the outer cylinder composed of a bottom cylinder, a top cylinder, a first annular cutting edge, a second annular cutting edge and a first supporting ring, in conjunction with a pressing and pulling handle, the soil of the measuring site can be quickly and conveniently positioned and selected; the soil taken out of the outer cylinder can be refilled through the measuring cylinder, so that the soil amount can be more accurately measured; at the same time, in conjunction with the first scale and the second scale, the density of the soil in the measuring cylinder can be more accurately ensured to be consistent with the soil density of the outer cylinder, so that the measurement accuracy can be improved; through the provision of a filter screen and air holes, the moisture communication between the soil below the measuring cylinder and the soil in the measuring cylinder can be ensured, and at the same time, the soil in the measuring cylinder can be prevented from moving out of the measuring cylinder, so that the accuracy of the measurement data can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a dew collector for measuring land surface moisture provided by the present invention;

[0017] Figure 2 for Figure 1 The cross-sectional structural diagram shown;

[0018] Figure 3 for Figure 1 The side cross-sectional structural diagram shown;

[0019] Figure 4 This is a structural schematic diagram of a dew collector for land surface moisture measurement provided by the utility model installed in the soil.

[0020] Numbers in the figure: 1, outer cylinder, 101, bottom cylinder, 102, top cylinder, 103, first annular cutting edge, 104, second annular cutting edge, 105, first support ring, 2, measuring cylinder, 3, second support ring, 4, weighing sensor, 5, filter screen, 6, air vent, 7, press-pull handle, 8, first scale, 9, second scale. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0022] Figure 1 A schematic structural diagram of a preferred embodiment of a dew collector for measuring land surface moisture provided by the present invention; Figure 2 for Figure 1 The cross-sectional structural diagram shown; Figure 3 for Figure 1 The side cross-sectional structural diagram shown; Figure 4 This is a schematic diagram of the structure of a dew collector for measuring land surface moisture, provided by the present invention, installed in soil. The dew collector for measuring land surface moisture comprises an outer cylinder 1, within which is housed a measuring cylinder 2. A second support ring 3 is fixedly mounted on the top of the measuring cylinder 2, positioned above the outer cylinder 1. A plurality of weighing sensors 4 arranged in a ring are fixedly mounted on the bottom of the second support ring 3. The bottom of the measuring cylinder 2 is provided with a plurality of air holes 6.

[0023] A filter screen 5 is placed in the measuring cylinder 2 , and the filter screen 5 is in contact with the bottom inner wall of the measuring cylinder 2 .

[0024] Two pressing and pulling handles 7 are symmetrically fixedly mounted on the top of the outer cylinder 1 , and the outer sides of the pressing and pulling handles 7 are covered with anti-slip sleeves.

[0025] The outer wall of the measuring cylinder 2 does not contact the inner wall of the outer cylinder 1 .

[0026] The outer cylinder 1 includes a bottom cylinder 101, and a top cylinder 102 is welded to the top of the bottom cylinder 101. The bottom cylinder 101 is located below the measuring cylinder 2. The inner diameter of the bottom cylinder 101 is the same as the inner diameter of the measuring cylinder 2. The top cylinder 102 is sleeved on the outside of the measuring cylinder 2. A first support ring 105 is provided on the top of the top cylinder 102. The bottom of the weighing sensor 4 is in contact with the top of the first support ring 105.

[0027] A first annular cutting edge 103 is provided on the bottom outer wall of the bottom tube 101 . The bottom tube 101 and the top tube 102 are integrally provided. A second annular cutting edge 104 is provided at the connection between the outer walls of the bottom tube 101 and the top tube 102 .

[0028] A first scale 8 is provided on the inner wall of the measuring cylinder 2 , and a second scale 9 is provided on the outer wall of the outer cylinder 1 . The first scale 8 is matched with the second scale 9 .

[0029] The working principle of the dew collector for land surface moisture measurement provided by the utility model is as follows:

[0030] When using, first take the measuring tube 2 out of the outer tube 1, then choose a relatively flat measuring place, then touch the bottom of the outer tube 1 to the ground of the measuring place, then hold the push-pull handle 7 with both hands, press the push-pull handle 7 hard to insert the bottom of the outer tube 1 into the measuring place, until the top tube 102 on the outer tube 1 partially enters the ground and part of the second scale 9 leaks out, then stop pressing the push-pull handle 7. During the above process, try to ensure that the outer tube 1 enters the ground vertically;

[0031] Then use a small shovel tool to shovel and collect the soil in the outer cylinder 1 until the soil surface in the outer cylinder 1 is flush with the top of the bottom cylinder 101. Stop shoveling at this time, then place the filter 5 into the measuring cylinder 2, and place the measuring cylinder 2 with the filter 5 into the outer cylinder 1. Then put all the collected soil into the measuring cylinder 2, and press the soil in the measuring cylinder 2 at the same time until the value of the first scale 8 corresponding to the soil surface in the measuring cylinder 2 is the same as the value of the second scale 9 corresponding to the soil surface outside the outer cylinder 1. Stop pressing the soil in the measuring cylinder 2. At this time, the weighing sensor 4 is used to measure the data of the measuring cylinder 2, so that the difference between the evaporation amount and the dew collection amount of the soil within a certain area can be completed.

[0032] Compared with related technologies, the dew collector for land surface moisture measurement provided by the present invention has the following beneficial effects:

[0033] The utility model provides a dew collector for measuring land surface moisture. Through the outer cylinder 1 composed of a bottom cylinder 101, a top cylinder 102, a first annular cutting edge 103, a second annular cutting edge 104 and a first support ring 105, in conjunction with a press-pull handle 7, the soil of the measuring site can be quickly and conveniently positioned and selected; the soil taken out of the outer cylinder 1 can be refilled through the measuring cylinder 2, so that the soil amount can be more accurately measured. At the same time, in conjunction with the first scale 8 and the second scale 9, the density of the soil in the measuring cylinder 2 can be more accurately ensured to be consistent with the soil density of the outer cylinder 1, thereby improving the measurement accuracy; through the provision of the filter 5 and the air vent 6, the moisture communication between the soil below the measuring cylinder 2 and the soil in the measuring cylinder 2 can be ensured, and the soil in the measuring cylinder 2 can be prevented from moving out of the measuring cylinder 2, thereby ensuring the accuracy of the measurement data.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dew collector for measuring land surface moisture, characterized in that: include: An outer cylinder, wherein a measuring cylinder is provided inside the outer cylinder, a second support ring is fixedly mounted on the top of the measuring cylinder, the second support ring is located above the outer cylinder, a plurality of weighing sensors distributed in an annular pattern are fixedly mounted on the bottom of the second support ring, and a plurality of air holes are opened at the bottom of the measuring cylinder; A first scale is provided on the inner wall of the measuring cylinder, and a second scale is provided on the outer wall of the outer cylinder, and the first scale is matched with the second scale.

2. The dew collector for land surface moisture measurement according to claim 1, characterized in that: A filter screen is placed in the measuring cylinder, and the filter screen is in contact with the bottom inner wall of the measuring cylinder.

3. The dew collector for measuring land surface moisture according to claim 1, characterized in that: Two pressing and pulling handles are symmetrically fixedly installed on the top of the outer cylinder, and the outer sides of the pressing and pulling handles are covered with anti-slip sleeves.

4. The dew collector for land surface moisture measurement according to claim 1, characterized in that: The outer wall of the measuring cylinder is not in contact with the inner wall of the outer cylinder.

5. The dew collector for measuring land surface moisture according to claim 1, characterized in that: The outer cylinder includes a bottom cylinder, a top cylinder is welded to the top of the bottom cylinder, the bottom cylinder is located below the measuring cylinder, the inner diameter of the bottom cylinder is the same as the inner diameter of the measuring cylinder, the top cylinder is sleeved on the outside of the measuring cylinder, a first support ring is provided on the top of the top cylinder, and the bottom of the weighing sensor is in contact with the top of the first support ring.

6. The dew collector for measuring land surface moisture according to claim 5, characterized in that: A first annular cutting edge is provided on the outer wall of the bottom of the bottom tube. The bottom tube and the top tube are integrally provided. A second annular cutting edge is provided at the connection between the outer walls of the bottom tube and the top tube.

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