CN106645131B - Test paper type portable soil moisture content measuring device - Google Patents
Test paper type portable soil moisture content measuring device Download PDFInfo
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- CN106645131B CN106645131B CN201710059939.9A CN201710059939A CN106645131B CN 106645131 B CN106645131 B CN 106645131B CN 201710059939 A CN201710059939 A CN 201710059939A CN 106645131 B CN106645131 B CN 106645131B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7756—Sensor type
- G01N2021/7759—Dipstick; Test strip
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- Plasma & Fusion (AREA)
- Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a test paper type portable soil moisture content measuring device, which is characterized in that: the device comprises a telescopic rod, a probe and a pile head which are sequentially connected, wherein the telescopic rod, the probe and the pile head form a working chamber, the working chamber is airtight, and an air exhaust device is arranged at the end part of the telescopic rod; the air exhaust device comprises a cavity, an air exhaust rod and a piston plate, wherein the air exhaust rod is fixedly connected with the piston plate, and the piston plate is tightly matched with the inner wall of the cavity; test paper can be paved in the probe. When the color chart is used, the color chart is compared with the tested test paper, and the corresponding water content is determined. The device is easy and convenient to operate when in use, can rapidly measure the water content in real time, and is convenient to detach and carry when not in use because all parts are connected through the thread structure.
Description
Technical Field
The invention relates to the field of geological exploration, in particular to a device for measuring water content, and especially for rapidly measuring water content of stratum at different depths.
Background
The water content is one of three-phase basic physical indexes of soil, has obvious influence on the physical and mechanical properties of the soil, and has very important significance on determining the physical and mechanical properties of the soil. The numerical value can be measured in a laboratory or directly measured at a construction site.
The method for measuring the water content is classified into a drying method, an alcohol combustion method, a specific gravity method, a solid volume method, and the like. The drying method and the alcohol combustion method are widely applied, but the collected soil samples need to be measured in a laboratory, so that the measuring steps are more, the time is longer, and certain errors exist. In order to obtain the result quickly, on-site measurement can be performed, so that the test result is closer to the actual value, and meanwhile, the test result can be obtained quickly.
Chinese patent publication No. 103592248A discloses a colorimetric determination method for soil moisture content. The method comprises the following steps of preparing an organic solution of cobalt chloride hexahydrate with the concentration of 0.1-30 g/L, and obtaining an absorbance-soil water content standard curve. When the soil moisture content is measured, leaching an organic solution of 0.1-30 g/L cobalt chloride hexahydrate into a soil sample to be measured, removing solid substances to obtain the absorbance of the solution to be measured, and carrying the absorbance into an established absorbance-soil moisture content standard curve equation to obtain the corresponding soil moisture content.
Chinese patent publication No. 103837501B discloses a method for analyzing the water content of sludge. The method includes a light source signal emitter, an optical detector. When the water content of the sludge is measured, a light source is used for sending a light source signal with specific wavelength to the sludge to be measured, an optical detector is used for collecting the light source signal for detecting the sludge reflection at the position that the detection signal and the light source signal form a specified reflection angle, and the water content of the sludge is determined by comparing the received light wave signals.
Chinese patent publication No. 104407021a discloses a soil moisture content measuring device. The device comprises a power supply, a sensor probe, a protection resistor and a data acquisition instrument. When the water content is measured, the sensor probe is required to be placed at a designated position on site, the resistivity of the position is measured, measurement data are acquired through the data acquisition instrument, different measurement voltages are caused by different resistivities, and finally the corresponding water content is measured through a voltage-water content curve.
The existing measuring device is mainly used for measuring the water content of soil body through on-site sampling and then through a laboratory drying method. Especially when the water content of different depths needs to be measured, multiple samples need to be taken, so that the original soil structure is damaged, the working efficiency is low, and the requirement of actually and rapidly obtaining a result cannot be met.
Disclosure of Invention
In order to overcome the defects of the existing water content measuring method, the invention aims to provide a device for rapidly measuring the water content of stratum at different depths.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a portable survey soil moisture content device of test paper formula which characterized in that: the device comprises a telescopic rod, a probe and a pile head which are sequentially connected, wherein the telescopic rod, the probe and the pile head form a working chamber, the working chamber is airtight, and an air exhaust device is arranged at the end part of the telescopic rod;
the air exhaust device comprises an air-tight cavity, an air exhaust rod penetrating through the upper end face of the cavity and a piston plate, wherein the air exhaust rod is fixedly connected with the piston plate, and the piston plate is tightly matched with the inner wall of the cavity;
the telescopic device is arranged at one end of the telescopic rod connected with the probe and consists of a plurality of hollow rods which are sleeved with each other in front and back, and the hollow rods are connected in an airtight manner;
the probe is sequentially provided with an upper section and a middle section from top to bottom, the length of the middle section is not longer than that of the lower section, the length of the lower section is not longer than that of the upper section, vertical strip-shaped test holes are arranged in a fence type, and guide rails are arranged on the inner wall of the fence between the adjacent test holes; the upper section and the lower section of the guide rail are respectively provided with a guide rail extension section, a test tube is arranged in the probe, the test tube is formed by nesting a test tube outer cylinder and a test tube inner cylinder, the test tube outer cylinder is provided with a convex strip, and the convex strip can slide up and down in cooperation with the guide rail; the test tube outer cylinder is divided into a closed section and a test section from top to bottom, a hollow design is adopted between adjacent convex strips of the test section, the length of the test section is matched with that of the middle section, the length of the test section does not exceed that of the closed section, and test paper can be paved between the test tube outer cylinder and the test tube inner cylinder;
a lifting mechanism is arranged in the working chamber, one end of the lifting mechanism is movably connected to the telescopic rod, and the other end of the lifting mechanism is fixed on the test tube; one end of the test tube far away from the lifting mechanism is connected with the probe through a reset spring.
Further, the lifting mechanism is fixed at the position between the air extractor and the telescopic device on the telescopic rod, the lifting mechanism comprises a mounting shaft, a roller, a pull rope fixed on the roller and a rocker fixedly connected with the roller, the mounting shaft is fixed on the telescopic rod, and the rocker is arranged on the outer wall of the telescopic rod.
Further, the mounting height of the test paper is larger than the height of the outer cylinder detection section of the test tube.
Still further, the mounting height of the test paper is equal to the height of the test tube.
Further, the length of the hollow rod is limited by the position of the rocker.
Further, the adjacent hollow rods may be connected by threads.
Further, the hollow rod, the probe and the pile head are all made of stainless steel.
Further, the piston plate is made of rubber.
Further, the telescopic rod is detachably connected with the probe, the probe and the pile head.
Still further, all connect through screw thread structure between telescopic link and probe, probe and the pile head.
The method for measuring the soil moisture content by using the test paper type portable soil moisture content measuring device comprises the following steps:
when the test tube is in operation, the air extraction rod is pushed into the bottommost end of the cavity, and the rocker is rotated, so that the test tube sealing area coincides with the middle section of the probe, and a sealing space is formed. Adjusting the length of the telescopic rod according to the measured depth, and inserting the telescopic rod into the measured depth at one time by using a static pressure method; rotating the rocker again to enable a test area in the test tube to coincide with the middle section of the probe, and then slowly pulling the air suction rod to enable the piston plate to reach the top; standing for a period of time, and loosening the rocker to enable the sealed area of the test tube to coincide with the middle section of the probe to form a sealed space again; the device is lifted and disassembled, and the test paper is taken out; comparing the color comparison card with the test paper after testing to determine the corresponding water content; adjusting the rod section, changing the length of the telescopic rod, repeating the steps to measure the soil moisture content basis of different depths, and finally obtaining the moisture content omega at each depth 1 、ω 2 、…ω n 。
The invention has the beneficial effects that: the probe of the device only works in the area to be measured, is not easy to be polluted, and has accurate measured results; the device is easy and convenient to operate during use, the water content can be rapidly measured in real time, all parts are connected through the threaded structure, and the device is convenient to detach and carry when not used.
Drawings
Fig. 1 is an overall view of the device.
Fig. 2 is a pile head structure diagram.
Fig. 3 is a diagram of the probe structure.
Fig. 4 is a cross-sectional view of the probe mid-section structure.
FIG. 5 is a block diagram of a test tube
Fig. 6 is a top view of a test tube.
Fig. 7 is a structural view of a telescopic rod.
FIG. 8 is a cross-sectional view of an evacuation device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the figure, pile head 1, return spring 2, test hole 3, fence 4, guide rail 5, probe 6, test tube 7, raised strip 8, test tube 9, telescopic rod 10, hollow rod 11, mounting shaft 12, rocker 13, roller 14, roller 15, cavity 16, air extracting rod 17 and piston plate.
The utility model provides a portable survey soil moisture content device of test paper formula which characterized in that: the telescopic rod 10, the probe 6 and the pile head 1 are sequentially connected, the telescopic rod 10, the hollow inside the probe and the pile head form a working chamber, the working chamber is airtight, and an air extractor is arranged at the end part of the telescopic rod 10.
The air exhaust device comprises an air-tight cavity 15, an air exhaust rod 16 penetrating through the upper end face of the cavity and a piston plate 17, wherein the air exhaust rod 16 is fixedly connected with the piston plate 17, and the piston plate 17 is tightly matched with the inner wall of the cavity 15.
The telescopic device is arranged at one end of the telescopic rod 10 connected with the probe 6, and consists of a plurality of hollow rods 11 which are sleeved with each other front and back, and the hollow rods 11 are connected in an airtight manner.
The probe 6 is sequentially provided with an upper section and a middle section from top to bottom, the length of the middle section is not longer than that of the lower section, the length of the lower section is not longer than that of the upper section, the middle section is provided with vertical strip-shaped test holes 3 which are arranged in a fence shape, and the inner wall of a fence 4 between adjacent test holes is provided with a guide rail 5; the upper section and the lower section of the guide rail 5 are respectively provided with a guide rail extension section, the probe 6 is internally provided with a test tube 7, the test tube 7 is formed by nesting a test tube outer cylinder and a test tube inner cylinder, the outer cylinder of the test tube 7 is provided with a raised strip 8, and the raised strip 8 is matched with the guide rail 5 to slide up and down; the test tube 7 is divided into a closed section and a test section from top to bottom, the adjacent convex strips 8 of the test section are in hollow design, the length of the test section is matched with that of the middle section, the length of the test section does not exceed that of the closed section, and test paper 9 can be paved between the outer tube and the inner tube of the test tube.
A lifting mechanism is arranged in the working chamber, one end of the lifting mechanism is movably connected to the telescopic rod 10, and the other end of the lifting mechanism is fixed on the test tube 7; one end of the test tube 7, which is far away from the lifting mechanism, is connected with the probe 6 through the return spring 2.
Further, one end of the lifting mechanism is fixed at a position between the air extractor and the telescopic device on the telescopic rod 10, the lifting mechanism comprises a mounting shaft 12, a roller 14, a pull rope fixed on the roller 14 and a rocker 13 fixedly connected with the roller, the mounting shaft 12 is fixed on the telescopic rod 10, and the rocker 13 is arranged on the outer wall of the telescopic rod 10.
The mounting height of the test paper is equal to the height of the test tube 7.
The length of the hollow rod 11 is limited by the position of the rocker 13.
The adjacent hollow rods 11 may be connected by screw threads.
The hollow rod 11, the probe 6 and the pile head 1 are all made of stainless steel. The piston plate 17 is made of rubber.
The telescopic rod 10 is detachably connected with the probe 6, the probe 6 and the pile head 1.
The telescopic rod 10 is connected with the probe 6, the probe 6 and the pile head 1 through a thread structure.
When the device is used for measuring the water content of soil, the air suction rod 16 is pushed into the bottommost end of the cavity 15, and the rocker 13 is rotated, so that the sealing area of the test tube 7 is overlapped with the middle section of the probe, and a sealing space is formed. Adjusting the length of the telescopic rod 10 according to the measured depth, and inserting the telescopic rod into the measured depth at one time by using a static pressure method; the rocker 13 is rotated again to enable a test area in the test tube 7 to coincide with the middle section of the probe 6, and then the air suction rod 16 is slowly pulled to enable the piston plate 17 to reach the top; standing for a period of time, loosening the rocker 13 to enable the sealed area of the test tube 7 to coincide with the middle section of the probe 6 to form a sealed space again; the device is lifted and disassembled, and the test paper 9 is taken out; comparing the color comparison card with the test paper 9 after testing to determine the correspondenceThe water content; adjusting the rod section to change the length of the telescopic rod 10, repeating the above steps to measure the water content of soil at different depths, and finally obtaining the water content omega at each depth 1 、ω 2 、…ω n 。
The above embodiments are merely preferred embodiments for fully explaining the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions and changes are within the scope of this patent by those skilled in the art based on this patent. The protection scope of this patent is subject to the claims.
Claims (8)
1. The utility model provides a portable survey soil moisture content device of test paper formula which characterized in that: the device comprises a telescopic rod (10), a probe (6) and a pile head (1) which are sequentially connected, wherein the telescopic rod (10), the hollow inside the probe and the pile head form a working chamber, the working chamber is airtight, and an air extractor is arranged at the end part of the telescopic rod (10);
the air exhaust device comprises an air-tight cavity (15), an air exhaust rod (16) penetrating through the upper end surface of the cavity and a piston plate (17), wherein the air exhaust rod (16) is fixedly connected with the piston plate (17), and the piston plate (17) is tightly matched with the inner wall of the cavity (15);
one end of the telescopic rod (10) connected with the probe (6) is provided with a telescopic device, the telescopic device consists of a plurality of hollow rods (11) which are sleeved with each other front and back, and the hollow rods (11) are connected in an airtight manner;
the probe (6) is sequentially provided with an upper section, a middle section and a lower section from top to bottom, the length of the middle section is not longer than that of the lower section, the length of the lower section is not longer than that of the upper section, vertical strip-shaped test holes (3) are arranged in a fence-shaped manner in the middle section, and guide rails (5) are arranged on the inner walls of fences (4) between adjacent test holes; the upper section and the lower section of the guide rail (5) are respectively provided with a guide rail extension section, the probe (6) is internally provided with a test tube (7), the test tube (7) is formed by nesting an outer tube and an inner tube of the test tube, the outer tube of the test tube (7) is provided with a raised strip (8), and the raised strip (8) can slide up and down in cooperation with the guide rail (5); the outer cylinder of the test tube (7) is divided into a closed section and a test section from top to bottom, hollow designs are arranged between adjacent convex strips (8) of the test section, the length of the test section is matched with that of the middle section, the length of the test section does not exceed that of the closed section, and test paper (9) can be paved between the outer cylinder of the test tube and the inner cylinder of the test tube;
a lifting mechanism is arranged in the working chamber, one end of the lifting mechanism is movably connected to the telescopic rod (10), and the other end of the lifting mechanism is fixed on the test tube (7); one end of the test tube (7) far away from the lifting mechanism is connected with the probe (6) through a return spring (2);
one end of the lifting mechanism is fixed at a position between the air extracting device and the telescopic device on the telescopic rod (10), the lifting mechanism comprises a mounting shaft (12), a roller (14), a pull rope fixed on the roller (14) and a rocker (13) fixedly connected with the roller, the mounting shaft (12) is fixed on the telescopic rod (10), and the rocker (13) is arranged on the outer wall of the telescopic rod (10);
when the test tube is in operation, the air extraction rod is pushed into the bottommost end of the cavity, and the rocker is rotated, so that the sealing area of the test tube is overlapped with the middle section of the probe, and a sealed space is formed.
2. The test paper type portable soil moisture content measuring device according to claim 1, wherein: the installation height of the test paper (9) is greater than the height of the outer barrel detection section of the test tube (7).
3. The test paper type portable soil moisture content measuring device according to claim 1, wherein: the installation height of the test paper (9) is equal to the height of the test tube (7).
4. The test paper type portable soil moisture content measuring device according to claim 1, wherein: the length of the hollow rod (11) is limited by the position of the rocker (13).
5. The test paper type portable soil moisture content measuring device according to claim 1, wherein: adjacent hollow rods may be connected by threads.
6. The test paper type portable soil moisture content measuring device according to claim 1, wherein: the piston plate (17) is made of rubber.
7. The test paper type portable soil moisture content measuring device according to claim 1, wherein: the telescopic rod (10) is detachably connected with the probe (6), the probe (6) and the pile head (1).
8. The test paper type portable soil moisture content device according to claim 7, wherein: the telescopic rod (10) is connected with the probe (6), the probe (6) and the pile head (1) through threaded structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059939.9A CN106645131B (en) | 2017-01-24 | 2017-01-24 | Test paper type portable soil moisture content measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059939.9A CN106645131B (en) | 2017-01-24 | 2017-01-24 | Test paper type portable soil moisture content measuring device |
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| CN106645131A CN106645131A (en) | 2017-05-10 |
| CN106645131B true CN106645131B (en) | 2023-09-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110618128B (en) * | 2019-10-15 | 2021-11-09 | 河海大学 | Test bar for rapidly testing concentration of chloride ions in concrete and preparation method and application thereof |
| CN111089640B (en) * | 2019-12-31 | 2021-11-02 | 青岛大学附属医院 | Measuring scale capable of measuring water content accurately and immediately |
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| CN105784704A (en) * | 2016-03-11 | 2016-07-20 | 国家电网公司 | Portable color display device for flue gas humidity |
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|---|---|
| CN106645131A (en) | 2017-05-10 |
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