CN209311375U - A kind of Soil Thermal Conductivity profile features measuring instrument - Google Patents
A kind of Soil Thermal Conductivity profile features measuring instrument Download PDFInfo
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- CN209311375U CN209311375U CN201821450301.4U CN201821450301U CN209311375U CN 209311375 U CN209311375 U CN 209311375U CN 201821450301 U CN201821450301 U CN 201821450301U CN 209311375 U CN209311375 U CN 209311375U
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Abstract
The utility model discloses a kind of Soil Thermal Conductivity profile features measuring instrument, the measuring instrument includes the stainless-steel pipe of a 50cm long, inside is equipped with 7 temperature sensors of spiral shape resistive heater and different interval distance, earth's surface or less 2cm can be measured, 5cm, 10cm, 15cm, the Soil Thermal Conductivity or thermal resistivity of the depths 25cm, 35cm and 50cm and the dynamic change of temperature.The utility model solves the problems, such as that conventional method needs to install multiple thermal conductivities and temperature sensor and could measure soil profile thermal conductivity and temperature change feature, the observation work that multi-level Soil Thermal Conductivity and temperature are realized using same probe has many advantages, such as that monitoring, precision automatically in situ are high, easy to use, at low cost.
Description
Technical field
The utility model relates to a kind of measuring instruments, and in particular to a kind of Soil Thermal Conductivity profile features measuring instrument.
Background technique
Soil Thermal Conductivity, also known as thermal coefficient are the indexs for characterizing soil transmitting heat ability, are under unit temperature gradient
The heat flux of conduction.The inverse of Soil Thermal Conductivity is thermal resistivity.Soil Thermal Conductivity and temperature (ground temperature) are to influence seed to sprout,
Plant and crop growthing development, root system activity and soil in various Biochemical processes key factor.Due to soil-forming process
And the influence of biology, there are the heterogeneities of height for soil profile (such as: the bulk density of different depth soil, quality, water content on section
It is different with the content of organic matter) lead to the heterogeneity of thermal conductivity on soil profile.
Currently, Soil Thermal Conductivity measuring method is divided into steady state method and cold store enclosure.Steady state method heating time is long, and heating causes
Temperature gradient can make moisture that migration, phase transformation and redistribution occur, to cause measurement error.Transient Method (cold store enclosure) measurement
Heating time is short when Soil Thermal Conductivity, smaller on water translocation, phase transformation and redistribution influence, and measurement result is more acurrate.Measurement soil
The Transient Method of earth thermal conductivity mainly include heat-pole method, thermoprobe method, single needle/crosspointer thermal pulse method, plane heat source method, Hot-strip Method,
Laser shines method etc., and wherein heat-pole method, thermoprobe method, single needle/crosspointer thermal pulse method etc. is referred to as thermal pulse method, be current application most
Extensively, and uniquely it can be realized indoor and the continuous rapid and accurate determination Soil Thermal Conductivity in field technology.
The principle of thermal pulse technology is the temperature field generated in isotropic medium by monitoring transient heat source
Variation characteristic, and a kind of method of the thermal conductivity of soil is obtained by solving the equation of heat conduction.It can be incited somebody to action according to the shape of probe
Thermal pulse technology is divided into single needle thermal pulse probe and crosspointer/spininess thermal pulse probe.It pops one's head in relative to crosspointer/spininess thermal pulse,
The measurement result of single needle thermal pulse probe is not influenced by probe spacing variation, and can according to need the length of design probe
Degree expands the range of the measurement soil body.But current single needle thermal pulse probe can only measure being averaged for probe inserted position soil
Thermal conductivity, how using single needle thermal pulse probe for continuous automatic measurement different depth Soil Thermal Conductivity in situ be have it is to be solved
A key technology.
Summary of the invention
The purpose of this utility model is to provide a kind of Soil Thermal Conductivity profile features measuring instrument in view of the above technical problems, should
Measuring instrument will be helpful to apply thermal pulse technology outer continuous automatic accurate acquisition Soil Thermal Conductivity profile features indoors, Er Qiejie
Structure is simple, easy to use.
To achieve the above object, the utility model takes following technical scheme: a kind of Soil Thermal Conductivity profile features measurement
Instrument is made of single needle thermal pulse probe and auxiliary bore hole device, and the single needle thermal pulse is popped one's head in by data collector, handle, led
Line cable, integrated circuit board, temperature sensor lead, stainless steel tube, rounded prongs, temperature sensor, heat-conduction epoxy resin and
Resistive heater composition, one end of the leader cable are connect with data collector, and the other end passes through and peace from handle base
It is installed therein the integrated circuit board connection of the heart；Temperature sensor lead is connected on the integrated circuit board；The temperature
Sensor conductor extends into the bottom of stainless steel tube, is sequentially installed with several temperature sensors from top to bottom thereon；Described
Stainless steel tube one end is protruded by pouring into polyvinylchloride or being insulated the solidified inside of epoxide resin material and handle in handle,
Its other end is connect with rounded prongs；The resistive heater spiral shape is placed in stainless steel tube, the temperature sensing
Heat-conduction epoxy resin is filled between hole gap between device, resistive heater and stainless steel tube.
The auxiliary bore hole device by stainless steel bar, stainless steel handle, circular bubble is horizontal and disk forms, it is described not
One end of rust rod iron is connect with stainless steel handle, another rounded tip in free end；The disk covers on stainless steel bar
And fixed close at stainless steel handle, the circular bubble is horizontally arranged at the center of stainless steel handle.
The specification of the handle is long 3cm × wide 2cm × high 5cm.
The temperature sensor is any one of NTC thermistor or E type, K-type, T-type thermocouple.
The resistive heater extends at rounded prongs.
The resistive heater is nichrome wire, and total resistance value is 100~1000 Ω m-1。
The utility model Soil Thermal Conductivity profile features measuring instrument, can be used for measuring the thermal conductivity of soil profile different depth
And temperature change feature, it is the earth such as Land surface energy budget and Research of Environmental Sciences under predictions and simulations climate, refers to
Lead agriculture and forestry production activity, the important means of ground and geological environment engineering construction.
The utility model Soil Thermal Conductivity profile features measuring instrument realizes the sight of the multi-level soil moisture using same probe
Work is surveyed, has many advantages, such as that the automatic monitoring in original position, precision are high, easy to install, it is easy to use, at low cost.
Detailed description of the invention
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
Fig. 1 is the sectional view of the single needle thermal pulse probe of the utility model Soil Thermal Conductivity profile features measuring instrument；
Fig. 2 is the structure chart of the auxiliary bore hole device of the utility model Soil Thermal Conductivity profile features measuring instrument；In figure: 1- number
According to collector, 2-probe heads, 3-leader cables, 4-integrated circuit boards, 5-temperature sensor leads, 6-stainless steel steel
Pipe, 7-rounded prongs, 8-temperature sensors, 9-heat-conduction epoxy resins, 10-resistive heaters, 11-stainless steel bars, 12-
Auxiliary bore hole device handle, 13-stainless steel disks, 14-circular bubble level meters.
Specific embodiment
Fig. 1 gives a kind of sectional view of Soil Thermal Conductivity profile features measuring instrument of the utility model, by single needle thermal pulse
Probe and auxiliary bore hole device composition, the single needle thermal pulse probe is by data collector 1, handle 2, leader cable 3, integrated electricity
Road plate 4, temperature sensor lead 5, stainless steel tube 6, rounded prongs 7, temperature sensor 8, heat-conduction epoxy resin 9 and adding thermal resistance
Silk 10 forms, and one end of the leader cable 3 is connect with data collector 1, and the other end is passed through and is mounted on from 2 bottom of handle
The integrated circuit board 4 at its center connects；Temperature sensor lead 5 is connected on the integrated circuit board 4；The temperature passes
Sensor conducting wire 5 extends into the bottom of stainless steel tube 6, is sequentially installed with several temperature sensors 8 from top to bottom thereon；Described
6 one end of stainless steel tube is protruded into solidifying by pouring into the inside of polyvinylchloride or insulation epoxide resin material and handle 2 in handle 2
Gu the other end is connect with rounded prongs 7；10 spiral shape of resistive heater is placed in stainless steel tube 6, described
Heat-conduction epoxy resin 9 is filled between hole gap between temperature sensor 8, resistive heater 10 and stainless steel tube 6.
Fig. 2 is a kind of structure chart of the auxiliary bore hole device of Soil Thermal Conductivity profile features measuring instrument of the utility model, auxiliary
Drill is made of stainless steel bar 11, stainless steel handle 12, circular bubble level 13 and disk 14, the stainless steel bar 11
One end connect with stainless steel handle 12, another rounded tip in free end；Described 14 sets of disk are on stainless steel bar 11
And fixed close at stainless steel handle 12, the circular bubble level 13 is mounted on the center of stainless steel handle 12.
The specification of the handle 2 is long 3cm × wide 2cm × high 5cm.
The temperature sensor 8 is any one of NTC thermistor or E type, K-type, T-type thermocouple.
The resistive heater 10 extends at rounded prongs 7, and the resistive heater 10 is nichrome wire, total to hinder
Value is 100~1000 Ω m-1。
The outer diameter of the stainless steel tube 6 is 2.5mm, and long 50cm, stainless steel tube top is sharpened processing 7, convenient for inserting
Enter soil.The stainless steel tube 6 can also be designed as different diameter and length as needed.
The resistive heater 10 that the inside of the stainless steel tube 6 is placed with 7 temperature sensors 8 and spiral shape is placed.
The temperature sensor 8 is respectively 2cm, 5cm, 10cm, 15cm, 25cm at a distance from the handle base,
30cm, 50cm.
The interior temperature sensor 8 of the stainless steel tube 6 can also be designed as different quantity and spacing as needed.
The diameter of the stainless steel bar 11 of the auxiliary bore hole device and length with it is mating, top is the circle by Edge contrast
Tip.
A circular bubble level 14 is embedded among the stainless steel handle 12 of the auxiliary bore hole device.
It is a round stainless steel disk 13 at the 12 lower section about 10cm of stainless steel handle of the auxiliary bore hole device.
Circle 13 diameter of stainless steel disk is 5cm, thickness 3mm, the smooth level of upper and lower surface.
A kind of use step of Soil Thermal Conductivity profile features measuring instrument of the utility model:
Illustrate the use of the instrument by taking the soil moisture profile survey of 50cm probe measurement soil profile temperature as an example below
Step:
The first step selects instrument infield, cleans out the smooth earth's surface of a fritter (never trampling experiment place).
Second step, auxiliary bore hole device is vertically slowly inserted into soil until stainless steel plate is in close contact earth's surface is
Only, the bubble of prototype air-bubble level should be kept to be always positioned at center during being inserted into auxiliary bore hole device.Edge later
Vertical direction is slowly withdrawn auxiliary bore hole device, can help to take out auxiliary bore hole device by slightly rotating auxiliary bore hole device handle,
Shaking auxiliary bore hole device should be avoided during taking-up leads to the varying aperture to drill, topsoil structural damage and drilling
Situations such as blocking.
Third step restores the original covering of earth's surface (such as grass, leaf along drilling insertion soil moisture profile survey probe
Deng).Power supply is connected, heating time length and heating frequency, temperature data acquisition frequency are controlled by data collector.Heating
Time suggests that control is each at 5~10 minutes, heating time period 2 hours or more twice.
4th step, experiment finish, and read the data stored in data collector, take out soil moisture profile survey probe.
Soil moisture profile survey can also be popped one's head in stay according to actual needs and be used for long-term observation in the soil.
It is worth noting that above-described embodiment is merely to illustrate the utility model, the length of middle probe, temperature sensor
Type, quantity and spacing, the type of resistance wire and resistance value, the connection type of each component, auxiliary bore hole device structural material
Etc. may be changed, all equivalents and improvement carried out on the basis of technical solutions of the utility model,
It should not exclude except the protection scope of the utility model.
Claims (5)
1. a kind of Soil Thermal Conductivity profile features measuring instrument is made of single needle thermal conductivity probe and auxiliary bore hole device, feature exists
In the single needle thermal conductivity is popped one's head in by data collector (1), handle (2), leader cable (3), integrated circuit board (4), temperature
Sensor conductor (5), stainless steel tube (6), rounded prongs (7), temperature sensor (8), heat-conduction epoxy resin (9) and adding thermal resistance
Silk (10) composition, one end of the leader cable (3) are connect with data collector (1), and the other end is passed through from handle (2) bottom
It is connect with the integrated circuit board (4) for being installed therein the heart；Temperature sensor lead is connected on the integrated circuit board (4)
(5)；The temperature sensor lead (5) extends into the bottom of stainless steel tube (6), is sequentially installed with from top to bottom thereon several
A temperature sensor (8)；Described stainless steel tube (6) one end is protruded into handle (2) by pouring into polyvinylchloride or adiabatic ring
The solidified inside of oxygen resin material and handle (2), the other end are connect with rounded prongs (7)；The resistive heater (10)
Spiral shape is placed in stainless steel tube (6), between the temperature sensor (8), resistive heater (10) and stainless steel tube (6)
Hole gap between be filled with heat-conduction epoxy resin (9)；
The auxiliary bore hole device is by stainless steel bar (11), stainless steel handle (12), circular bubble horizontal (13) and disk (14)
Composition, one end of the stainless steel bar (11) are connect with stainless steel handle (12), another rounded tip in free end；It is described
Disk (14) cover on stainless steel bar (11) and fixed close at stainless steel handle (12), the circular bubble is horizontal
(13) it is mounted on the center of stainless steel handle (12).
2. a kind of Soil Thermal Conductivity profile features measuring instrument according to claim 1, which is characterized in that the handle
(2) specification is long 3cm × wide 2cm × high 5cm.
3. a kind of Soil Thermal Conductivity profile features measuring instrument according to claim 1, which is characterized in that the temperature passes
Sensor (8) is any one of NTC thermistor or E type, K-type, T-type thermocouple.
4. a kind of Soil Thermal Conductivity profile features measuring instrument according to claim 1, which is characterized in that the heating electricity
Resistance silk (10) extends at rounded prongs (7).
5. a kind of Soil Thermal Conductivity profile features measuring instrument according to claim 4, which is characterized in that the adding thermal resistance
Silk (10) is nichrome wire, and total resistance value is 100~1000 Ω m-1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821450301.4U CN209311375U (en) | 2018-09-05 | 2018-09-05 | A kind of Soil Thermal Conductivity profile features measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821450301.4U CN209311375U (en) | 2018-09-05 | 2018-09-05 | A kind of Soil Thermal Conductivity profile features measuring instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374670A (en) * | 2018-09-05 | 2019-02-22 | 西北农林科技大学 | A kind of Soil Thermal Conductivity profile features measuring instrument |
| CN111122649A (en) * | 2020-01-07 | 2020-05-08 | 吉林大学 | Waterproof wireless type in-situ soil layer thermophysical property parameter measuring device |
| CN111189878A (en) * | 2020-01-23 | 2020-05-22 | 福建省恒鼎建筑工程有限公司 | Soil water content detection system and soil slimming early warning method |
-
2018
- 2018-09-05 CN CN201821450301.4U patent/CN209311375U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374670A (en) * | 2018-09-05 | 2019-02-22 | 西北农林科技大学 | A kind of Soil Thermal Conductivity profile features measuring instrument |
| CN109374670B (en) * | 2018-09-05 | 2024-05-03 | 西北农林科技大学 | Soil thermal conductivity profile characteristic measuring instrument |
| CN111122649A (en) * | 2020-01-07 | 2020-05-08 | 吉林大学 | Waterproof wireless type in-situ soil layer thermophysical property parameter measuring device |
| CN111189878A (en) * | 2020-01-23 | 2020-05-22 | 福建省恒鼎建筑工程有限公司 | Soil water content detection system and soil slimming early warning method |
| CN111189878B (en) * | 2020-01-23 | 2022-08-16 | 福建省恒鼎建筑工程有限公司 | Soil water content detection system and soil slimming early warning method |
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