CN219641519U - Automatic measurement test device for soil moisture infiltration characteristics - Google Patents
Automatic measurement test device for soil moisture infiltration characteristics Download PDFInfo
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- CN219641519U CN219641519U CN202320724935.9U CN202320724935U CN219641519U CN 219641519 U CN219641519 U CN 219641519U CN 202320724935 U CN202320724935 U CN 202320724935U CN 219641519 U CN219641519 U CN 219641519U
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- column casing
- water
- soil
- singlechip
- peristaltic pump
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- 239000002689 soil Substances 0.000 title claims abstract description 90
- 230000008595 infiltration Effects 0.000 title claims abstract description 28
- 238000001764 infiltration Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000005259 measurement Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 3
- 230000002572 peristaltic effect Effects 0.000 claims description 44
- 239000013256 coordination polymer Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to an automatic measurement test device for soil moisture infiltration characteristics, which belongs to the field of measurement test devices for soil infiltration performance, and comprises a soil column casing and a water column casing, wherein a connecting pipe is arranged between the soil column casing and the water column casing, and two ends of the connecting pipe are respectively connected and communicated with the side walls of the soil column casing and the water column casing; the top ends of the soil column casing and the water column casing are provided with openings; the bottom end of the water column casing is provided with a pressure sensor for monitoring the water pressure in the water column casing; the test device also comprises a singlechip for processing the information of the pressure sensor; the singlechip is electrically connected with a water supply assembly for adding water into the water supply column casing. The water injection quantity in the soil column casing is controlled by the test device through the singlechip and the pressure sensor, so that waste is avoided. And the corresponding relation between the water injection quantity in the soil column casing and time is also established through the singlechip and the water supply assembly.
Description
Technical Field
The utility model belongs to the field of soil infiltration performance measurement test devices, and particularly relates to an automatic measurement test device for soil moisture infiltration characteristics.
Background
The quantitative description of water circulation and water utilization in the soil infiltration process is an important experimental content of the soil infiltration test. Has important theoretical significance and practical value for researching the mechanism of earth surface runoff, increasing soil infiltration, improving the water utilization efficiency of crops, retaining water and soil and the like.
The traditional soil infiltration measuring device adopts methods such as a double-ring infiltration instrument method, a disc infiltration instrument method, a Maroite-double-ring instrument method, an artificial rainfall method and the like.
The testing device of the common double-ring infiltration method comprises a plurality of stainless steel rings with different diameters, and can simultaneously perform several measurements so as to obtain correct and reliable results. The outer ring of the infiltration instrument can play a role in isolation when vertical infiltration water flows to the edge. Since the water in the inner ring is flowing vertically, the measurement is limited to being performed in the inner ring. The inner ring and the outer ring are pressed into soil for a few centimeters by the driving disk and the energy-absorbing hammer, and because the inner ring and the outer ring are filled with water, water is respectively added into the annular space between the inner ring and the inner ring during test, so that the water level in the leakage cylinder of the inner ring and the outer ring is unchanged, and the water level is kept at 10cm. The reading error is large because the water is contained in the ring, and the water head instability causes large change of the infiltration rate. And the annular space between the inner ring and the outer ring is filled with water respectively, so that water is somewhat wasted.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides an automatic measurement test device for soil moisture infiltration characteristics, which aims to solve the technical problem of how to save water and automatically and accurately describe the corresponding relationship between the soil infiltration amount and time.
In order to achieve the above purpose, the automatic measurement test device for soil moisture infiltration characteristics comprises a soil column casing and a water column casing, wherein a connecting pipe is arranged between the soil column casing and the water column casing, and two ends of the connecting pipe are respectively connected and communicated with the side walls of the soil column casing and the water column casing; the top ends of the soil column casing and the water column casing are provided with openings; the bottom end of the water column casing is provided with a pressure sensor for monitoring the water pressure in the water column casing; the test device also comprises a singlechip for processing the information of the pressure sensor; the singlechip is electrically connected with a water supply assembly for adding water into the water supply column casing.
Further, a thin column casing is fixed at the top end of the soil column casing, the thin column casing is transparent, and the lower end of the thin column casing is connected and communicated with the upper end of the soil column casing; the soil column casing and the thin column casing are cylindrical, and the diameter of the thin column casing is smaller than that of the soil column casing.
The transparent thin column cylinder is adopted, so that operators can conveniently observe the water level in the thin column cylinder directly. The reason that the diameter of the thin column tube is smaller than that of the soil column tube is that when soil in the soil column tube infiltrates downwards, the soil absorbs the same amount of water, the water level in the thin column tube with small diameter drops more obviously than that in the soil column tube, and the water level change can be observed more obviously by experimenters.
Further, the water supply assembly comprises a peristaltic pump, one end of the peristaltic pump is connected with a water storage tank, and the other end of the peristaltic pump extends into the water column tube.
The peristaltic pump is adopted because the peristaltic flow is in a direct proportion to the number of turns of the peristaltic pump, the peristaltic pump can be known before the peristaltic pump is used, and in the experimental process, the water injection quantity of water injected into the soil column can be known only by controlling the running time of the peristaltic pump and multiplying the peristaltic pump by the peristaltic pump flow.
Further, the two ends of the connecting pipe are positioned at the same height, and the heights of the two ends of the connecting pipe and the soil column casing are equal.
The water levels at the two ends of the connecting pipe have no water level difference, so that the soil in the soil column casing can not obstruct water absorption due to the water level difference when absorbing water, and the soil in the soil column casing can be conveniently absorbed and infiltrated.
Further, the singlechip is an STM32 series singlechip, and the test device also comprises a battery; the PAI interface of the singlechip is connected with the negative electrode of the pressure sensor through a resistor RA, the positive electrode of the pressure sensor is connected with the positive end of the battery, and the negative end of the battery is connected with the grounding end of the singlechip; the positive electrode of the peristaltic pump is connected with the positive end of the battery, and the negative electrode of the peristaltic pump is connected with the negative end of the battery; the PA8 interface of the singlechip is connected with the CP interface of the peristaltic pump, the PC10 interface of the singlechip is connected with the EN interface of the peristaltic pump, and the PA9 interface of the singlechip is connected with the DIR interface of the peristaltic pump.
And the STM32 series singlechip is adopted, so that the whole structure is simple, and the whole experimental device is simplified and miniaturized.
The beneficial effects are that:
the device adopts the singlechip and the pressure sensor, the soil in the soil column tube absorbs water, the singlechip controls the peristaltic pump to inject water into the soil column tube, and water waste is avoided.
Because the singlechip and the peristaltic pump are adopted, the water injection quantity into the soil column casing can be clearly known, and the corresponding relation between the water injection quantity and the water injection time of the peristaltic pump is established according to the time of the singlechip operating the peristaltic pump.
Drawings
Fig. 1 is a schematic diagram of the whole structure of the device.
1. A water column; 2. a thin column casing; 4. a soil column casing; 5. a pressure sensor; 7. a single chip microcomputer; 8. a peristaltic pump; 9. a battery; 10. a connecting pipe; 11. a resistor RA; 12. a water storage tank; 13. and a water discharge valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the soil moisture infiltration characteristic automatic measurement test device comprises a soil column casing 4 and a water column casing 1, wherein the soil column casing 4 is cylindrical and vertically arranged, the height of the soil column casing 4 is 0.58m, the diameter is not limited, and the soil column casing 4 is provided with surface walls at the upper and lower sides. The water column casing 1 is cylindrical, vertically arranged, 0.7m high, unlimited in diameter, provided with a lower bottom wall and open at the upper end.
The upper end of the soil column casing 4 is provided with a thin column casing 2, the soil column casing 4 is vertically arranged and is 0.12m high, the upper end of the soil column casing 4 and the lower end of the thin column casing 2 are positioned on the same plane, and the soil column casing 4 is fixedly connected with the thin column casing 2. The overall height of the soil cylinder 4 and the slim cylinder 2 is 0.7m. The diameter of the thin column casing 2 is smaller than that of the earth column casing 4, and the diameter of the thin column casing 2 is 3cm. The soil column casing 4 and the thin column casing 2 are mutually communicated, and the joint of the soil column casing 4 and the thin column casing 2 is sealed. The upper end of the thin column casing 2 is open.
The soil column casing 4, the water column casing 1 and the thin column casing 2 are all made of transparent glass.
A connecting pipe 10 is arranged between the soil column casing 4 and the water column casing 1, the material is rubber, and two ends of the connecting pipe 10 are respectively connected and communicated with the side walls of the soil column casing 4 and the water column casing 1. The connecting point of the connecting pipe 10 and the soil column casing 4 is 0.58m away from the lower end of the soil column casing 4; the connection point of the connection pipe 10 and the water column 1 is 0.58m away from the lower end of the water column 1.
The lower end of the soil barrel 4 is provided with a drain valve 13 for draining water in the soil barrel 4. The lower end of the water column casing 1 is provided with a pressure sensor 5 for monitoring the water pressure in the water column casing 1.
The test device further comprises a single chip microcomputer 7 of STM32 series, a PAI interface of the single chip microcomputer 7 is connected with the negative electrode of the pressure sensor 5 through a resistor RA11, and the positive electrode of the pressure sensor 5 is connected to the positive end of the battery 9. The negative end of the battery 9 is connected with the grounding end of the singlechip 7.
The test device also includes a peristaltic pump 8. Peristaltic pump 8 may be, but is not limited to, a peristaltic pump 8 of the type BT300-1L, and the peristaltic pump 8 has a flow rate in the range of 350ml/min. The water inlet end of the peristaltic pump 8 is connected with a water storage tank 12, and the water outlet end of the peristaltic pump 8 is arranged at the upper end of the water column casing 1 and is used for supplementing water into the water column casing 1.
The positive pole of peristaltic pump 8 is connected with the positive end of battery 9, and the negative pole of peristaltic pump 8 is connected with the negative end of battery 9. The PA8 interface of the singlechip is connected with the CP interface of the peristaltic pump 8. The PC10 interface of the singlechip 7 is connected with the EN interface of the peristaltic pump 8. The PA9 interface of the singlechip 7 is connected with the DIR interface of the peristaltic pump 8.
The use process of the device is as follows:
1. in the soil column casing 4, the soil having a diameter of less than 2mm is filled, and the filled soil has a height of 0.58m, that is, the entire soil column casing 4 is filled.
2. Water is added into the soil column tube 4 through the thin column tube 2 until the soil infiltration in the soil column tube 4 is uniformly changed (judged by experience of experimenters), and the water is continuously added until the water level reaches 1/2 of the height of the thin column tube 2 (approximately), wherein the water level in the soil column tube 4 and the thin column tube 2 is 0.58+0.12/2=0.64 m.
3. The initial water level of the water column 1 is also as high as half the fine column in the earth column (about 0.64 m).
4. The liquid level in the soil column casing 4 infiltrates downwards, and the water level in the thin column casing 2 also descends; the water level in the soil column casing 4 and the water level in the water column casing 1 generate water level difference, and under the action of pressure, the water in the water column casing 1 flows into the soil column casing 4 through the connecting pipe 10; the water pressure in the water column casing 1 changes, the pressure sensor 5 monitors the pressure reduction and transmits the pressure reduction to the singlechip 7, and the singlechip 7 monitors that the value of the pressure sensor 5 is lower than a designed threshold value (the original pressure value of the pressure sensor); the singlechip 7 controls the peristaltic pump 8 to operate, water in the water storage tank 12 is added into the water column 1 until the water level in the water column 1 is still 0.64m, the value of the pressure sensor 5 reaches the threshold value set by the singlechip 7, and the peristaltic pump 8 stops operating.
5. According to the time of the singlechip 7 controlling the water inflow of the peristaltic pump 8, multiplied by the flow of the peristaltic pump 8 (350 ml/min in this embodiment), the singlechip 7 can calculate the water inflow (which is equal to the infiltration amount in the soil column casing 4). And combining the infiltration amount in the soil column casing 4 with the time of the singlechip 7, and drawing a corresponding relation diagram of the infiltration amount in the soil column casing 4 and the time by the singlechip 7.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (5)
1. The automatic soil moisture infiltration characteristic measurement test device is characterized by comprising a soil column casing and a water column casing, wherein a connecting pipe is arranged between the soil column casing and the water column casing, and two ends of the connecting pipe are respectively connected and communicated with the side walls of the soil column casing and the water column casing; the top ends of the water column casings are provided with openings;
the bottom end of the water column casing is provided with a pressure sensor for monitoring the water pressure in the water column casing; the test device also comprises a singlechip for processing the information of the pressure sensor; the singlechip is electrically connected with a water supply assembly for adding water into the water supply column casing.
2. The automatic soil moisture infiltration characteristic measurement test device according to claim 1, wherein a thin column casing is fixed at the top end of the soil column casing, the thin column casing is transparent, and the lower end of the thin column casing is connected and communicated with the upper end of the soil column casing; the soil column casing and the thin column casing are cylindrical, and the diameter of the thin column casing is smaller than that of the soil column casing.
3. The automatic soil moisture infiltration characteristic measurement test device according to claim 1, wherein the water supply assembly comprises a peristaltic pump, one end of the peristaltic pump is connected with a water storage tank, and the other end of the peristaltic pump extends into the water column tube.
4. The apparatus according to claim 1, wherein the two ends of the connecting pipe are at the same height, and the two ends of the connecting pipe are equal to the soil cylinder in height.
5. The automatic measurement test device for the soil moisture infiltration characteristic according to claim 1, wherein the single-chip microcomputer is an STM32 series single-chip microcomputer, and the test device further comprises a battery; the PAI interface of the singlechip is connected with the negative electrode of the pressure sensor through a resistor RA, the positive electrode of the pressure sensor is connected with the positive end of the battery, and the negative end of the battery is connected with the grounding end of the singlechip;
the positive electrode of the peristaltic pump is connected with the positive end of the battery, and the negative electrode of the peristaltic pump is connected with the negative end of the battery; the PA8 interface of the singlechip is connected with the CP interface of the peristaltic pump, the PC10 interface of the singlechip is connected with the EN interface of the peristaltic pump, and the PA9 interface of the singlechip is connected with the DIR interface of the peristaltic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724935.9U CN219641519U (en) | 2023-04-04 | 2023-04-04 | Automatic measurement test device for soil moisture infiltration characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724935.9U CN219641519U (en) | 2023-04-04 | 2023-04-04 | Automatic measurement test device for soil moisture infiltration characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219641519U true CN219641519U (en) | 2023-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320724935.9U Active CN219641519U (en) | 2023-04-04 | 2023-04-04 | Automatic measurement test device for soil moisture infiltration characteristics |
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| Country | Link |
|---|---|
| CN (1) | CN219641519U (en) |
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2023
- 2023-04-04 CN CN202320724935.9U patent/CN219641519U/en active Active
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