CN204374133U - A kind of cannula type soil moisture sensor - Google Patents

A kind of cannula type soil moisture sensor Download PDF

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Publication number
CN204374133U
CN204374133U CN201420775546.XU CN201420775546U CN204374133U CN 204374133 U CN204374133 U CN 204374133U CN 201420775546 U CN201420775546 U CN 201420775546U CN 204374133 U CN204374133 U CN 204374133U
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CN
China
Prior art keywords
groove
ring
sensor
soil moisture
pipe
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Application number
CN201420775546.XU
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Chinese (zh)
Inventor
张振强
黄小龙
王一
陈浩
张勇
李明放
刘伟杰
冶金
吴苏
韩振宇
陈涛
李鹏
李秀红
顾建军
Original Assignee
河南中原光电测控技术有限公司
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Priority to CN201420775546.XU priority Critical patent/CN204374133U/en
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Publication of CN204374133U publication Critical patent/CN204374133U/en

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Abstract

The utility model relates to a kind of cannula type soil moisture sensor, on sensor outer wall of inner tube, interval setpoint distance lays groove along its length, the part that outer wall of inner tube does not arrange groove arranges at least one ring groove, ring groove is arranged with for keeping the elastic ring of certain interval with sleeve pipe.The utility model keeps at a certain distance away along its length laying groove on sensor outer wall of inner tube, and the part that outer wall of inner tube does not arrange groove arranges ring groove, and ring groove is arranged with elastic ring.This elastic ring is used for interior pipe and sleeve pipe keeps certain interval, when carrying out encapsulation with sleeve pipe, elastic ring plays the effect well stoping and collide with interior pipe, prevent the problem of colliding the component damage brought, and elastic ring plays the effect of centralized positioning, when ensureing that sensor repeatedly plugs, the consistance of data, solves the conforming difficult problem of product measurement data in batch production.

Description

A kind of cannula type soil moisture sensor

Technical field

The utility model relates to a kind of cannula type soil moisture sensor, belongs to soil moisture automatic measurement technology field.

Background technology

Soil moisture automatic measurement technology is widely used in the important monitoring project such as agricultural, water conservancy, meteorology, forestry and ecology.Soil moisture measurement technology is the important technology guarantee that saving water, resisting drought is implemented, and is of great importance to the regional planning of agriculture, woods, animal husbandry.Portable cannula type soil moisture measurement sensor is the important technical realizing variable irrigation, Soil Moisture Monitoring.

The method that at present both at home and abroad soil moisture is measured automatically has a variety of, utilizes the dielectric property of soil to be a kind of effective, quick, easy and method reliably to measure soil moisture content.Wherein the measuring method such as TDR (Time Domain Reflectometry) time domain reflectometry and FDR (Frequency Domain Reflectometry) frequency domain reflectometry, standing wave method all belongs to the soil moisture measurement method based on Dielectric Constant of NaCl Soil characteristic, and is widely applied in the automatic fields of measurement of soil moisture.Portable cannula type soil moisture sensor is based on FDR High-Frenquency Electronic Technology, is measured by the water cut of specific inductive capacity to different depth section soil measuring soil.

The mode that traditional soil moisture measurement sensor utilizes probe directly to contact with soil detects the water cut of soil, and this metering system operates fairly simple and can realize the real-time automatic measuring of soil moisture.There is following drawback in this metering system: can only carry out spot measurement, if measure the soil moisture of different depth, the layering that soil profile carries out sensor must be excavated bury underground, quantities is large, not easy care, and needing the process of soil natural sedimentation and instrument stabilizer, spread difficulty is larger; Secondly this kind of sensor in use must be buried in soil for a long time, and its metal probe is perishable, and measuring accuracy must be caused to decline.Although cannula type soil moisture sensor overcomes the problems referred to above, but its volume is large, and carry, install inconvenience, copper ring electric capacity cost is high, and waterproof construction is loaded down with trivial details and effect is general.

Existing patent ZL201220264356.2, name is called cannula type soil moisture temperature sensor, comprises sensor body, controlled processing unit and sensor node, this sensor body is provided with groove, and controlled processing unit and sensor node are all arranged in groove.Adopt this sensor can record the moisture information of soil, but this sensor body is when with sleeve pipe encapsulation, be easy to collide with inside pipe casing, because the components and parts such as copper ring electric capacity are arranged at interior tube-surface, the component damage such as copper ring electric capacity can be caused when colliding, not only change components and parts and add extra cost, and the components and parts after damaging also can cause very large error to measurement data, once have wrong judgement to soil moisture, very large misleading can be caused to follow-up work.

Utility model content

The purpose of this utility model is to provide a kind of cannula type soil moisture sensor, the problem of fragile sensor components and parts during in order to solve existing soil moisture sensor and sleeve pipe encapsulation.

For achieving the above object, scheme of the present utility model comprises a kind of cannula type soil moisture sensor, comprise pipe and sleeve pipe in sensor, in this sensor, pipe sets gradually at least one sensing unit of controlled processing unit and layered arrangement from top to bottom, sensing unit comprises two copper ring electric capacity, a chip select circuit plate and a frequency collection unit, sensor outer wall of inner tube lays groove along its length, copper ring electric capacity welds with the pad face of frequency collection unit, be sleeved on groove, on sensor outer wall of inner tube, interval setpoint distance lays groove along its length, the part that outer wall of inner tube does not arrange groove arranges at least one ring groove, ring groove is arranged with the elastic ring for making interior pipe and sleeve pipe keep certain interval.

The cell wall of ring groove is provided with the hole slot for facilitating elastic ring installation and removal.

The top of sensing unit is provided with capillary groove.

Arrange bottom interior pipe one for coordinating with sleeve pipe time the top guide that play the guiding role, top guide is connected with Internal Pipe Thread.

Elastic ring is divided into two-layer, and inner ring is rubber ring, outer ring is spring coil.

Interior pipe top is provided with a handle, and handle and interior pipe are connected by screw.

Sleeve bottom arranges the waterproof end plug of a pyramidal structure, is connected between waterproof end plug with sleeve pipe with seal with elastometic washer.

The utility model keeps at a certain distance away along its length laying groove on sensor outer wall of inner tube, and the part that outer wall of inner tube does not arrange groove arranges ring groove, and ring groove is arranged with elastic ring.When carrying out encapsulation with sleeve pipe, due to the barrier effect of elastic ring, sleeve pipe can contact with elastic ring, avoid interior pipe and the direct contact and crash of sleeve pipe, namely in, pipe and sleeve pipe keep certain interval, not only prevent the problem of colliding the component damage brought, have saved cost, the most important thing is the accuracy that ensure that measurement data, good basis is laid to follow-up work.In addition, elastic ring plays the effect of centralized positioning, and when ensureing that sensor repeatedly plugs, the consistance of data, solves the conforming difficult problem of product measurement data in batch production.

Accompanying drawing explanation

Fig. 1 is the structural representation of pipe embodiment in this sensor;

Fig. 2 is the structural representation of sleeve pipe;

Fig. 3 is the partial enlarged drawing of Fig. 1;

Fig. 4 is the sectional view of groove;

Fig. 5 is the sectional view of ring groove.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in more detail.

A kind of cannula type soil moisture sensor, comprise pipe and sleeve pipe in sensor, in this sensor, pipe sets gradually at least one sensing unit of controlled processing unit and layered arrangement from top to bottom, sensing unit comprises two copper ring electric capacity, a chip select circuit plate and a frequency collection unit, sensor outer wall of inner tube lays groove along its length, copper ring electric capacity welds with the pad face of frequency collection unit, be sleeved on groove, on sensor outer wall of inner tube, interval setpoint distance lays groove along its length, the part that outer wall of inner tube does not arrange groove arranges at least one ring groove, ring groove is arranged with the elastic ring for making interior pipe and sleeve pipe keep certain interval.

Based on above technical scheme, by reference to the accompanying drawings, provide with next embodiment.

As depicted in figs. 1 and 2, a kind of cannula type soil moisture sensor that the utility model provides, comprise pipe 1 and sleeve pipe 9 in sensor, interior pipe 1 sets gradually at least one sensing unit of controlled processing unit 5 and layered arrangement from top to bottom, this sensing unit comprises two copper ring electric capacity, 6, chip select circuit plate 7 and a frequency collection unit 12.

As shown in Figure 3, in sensor pipe 1 outer wall on along its length interval setpoint distance lay groove 2, the part that interior pipe 1 outer wall does not arrange groove 2 arranges at least one ring groove 3.

As shown in Figure 4, copper ring electric capacity 6 welds with the pad face of frequency collection unit 12, is sleeved on groove 2.

As shown in Figure 5, ring groove 3 is arranged with the elastic ring for making interior pipe and sleeve pipe keep certain interval, this elastic ring is made up of materials at two layers, and inner ring is rubber ring 13, outer ring is spring coil 14.

Interior pipe top is provided with a handle 10, and handle 10 and interior pipe 1 are connected by screw, air plug reversal connection, and fluted in bottom handle 10, coordinate waterproof with interior pipe 1, simplify waterproof construction, waterproof effect is obvious.

In sensor, pipe 1 is when carrying out encapsulation with sleeve pipe 9, due to the effect of elastic ring, interior pipe and sleeve pipe can not directly be collided, and plays the problem well stoping collision when plug, and then avoids the problem of colliding the component damage brought.Arrange like this and saved cost, and ensure that the accuracy of measurement data, good basis is laid to follow-up work.

The cell wall of ring groove arranges hole slot 15, is convenient to elastic ring installation and removal like this, when needs are dismantled time, only pin or other elongated things need be used to put in hole slot 15, elastic ring is provoked.

Arrange in the bottom of interior pipe 1 one for coordinating with sleeve pipe 9 time the top guide 8 that play the guiding role, this top guide 8 is connected with the bottom thread of interior pipe 1.

In order to realize waterproof, between controlled processing unit 5 and sensing unit, being provided with two capillary grooves 4, coordinating elastic ring, handle and sleeve pipe, playing dual waterproof action when mounted.

Sleeve pipe 9 is glass material, arranges a waterproof end plug 11 in the bottom of sleeve pipe 9.The guidepost of waterproof end plug 11 adopts pyramidal structure, above flutedly to coordinate with elastic ring, adopt seal with elastometic washer to be connected with sleeve pipe 9.

Controlled processing unit, the computing of primary responsibility data, communication, time sharing power supply collection control.

Frequency collection unit, receives the control signal of controlled processing unit, carries out frequency signal acquisition time.

Each sensing unit is made up of two copper ring electric capacity, frequency collection unit and chip select circuit plate.The quantity of sensing unit can be 1 ~ 8, and each layer position can adjust arbitrarily.The welding circuit board means of spot welds of two copper ring electric capacity and frequency collection unit, the chip select circuit plate in groove is connected with controlled processing unit.

The circuit board of frequency collection unit is connected by 5 core winding displacements with chip select circuit plate.

The copper sheet of copper ring electric capacity is of a size of: 64 ㎜ × 25 ㎜, and the spacing of two copper ring electric capacity is 12 ㎜.The change of moisture, as a part for oscillatory circuit, is converted to the change of frequency by copper ring electric capacity.

Frequency collection circuit board have LC oscillatory circuit and frequency dividing circuit.The oscillation frequency change of oscillatory circuit is between 100MHZ ~ 150MHZ.

Controlled processing unit, computing, the communication of primary responsibility data, by control 1 No. 8 electronic switch, realizes controlling the time sharing power supply of 8 road frequency collection unit; Frequency collection unit, is responsible for the collection of frequency signal, receives the Time-sharing control power supply signal of controlled processing unit, realizes the acquisition time to 8 road frequency signals; Chip select circuit plate, for the supply lines of gating frequency Acquisition Circuit, and gating 8 road power supplying control signal.

Controlled processing unit plate comprises 1 CPU, 1 power conversion unit, No. 8 electronic switches, 14 core socket, 1 20 core cable terminal.CPU is used for the control of various control signal, the process calculating of frequency signal, the storage of data; 1 power conversion unit realizes+12V to+5V conversion; 1 No. 8 electronic switch receives the control signal of CPU, realizes the time sharing power supply to 8 road frequency collection unit.+ the 12V that 4 core sockets receive host computer powers, and realizes 485 communications of controlled processing unit and host computer; 20 core cable terminals mainly comprise GND ,+12V ,+5V, 8 road time sharing power supply control signal ports, frequency signal port.

Frequency collection unit comprises a power conversion unit, a LC oscillatory circuit and two frequency dividing circuits; + 12V is converted to+5V by power conversion unit, supply LC oscillatory circuit and frequency dividing circuit.LC oscillatory circuit has an assembly welding contact connect two copper rings as electric capacity, this electric capacity and inductance form LC oscillatory circuit, and LC oscillatory circuit produces high-frequency signal and is sent to frequency dividing circuit, carries out frequency signal process calculating after frequency division by being sent to controlled processing unit.

Pipe external diameter 26mm, internal diameter 11mm, long 1300mm in sensor.The protective casing internal diameter 26mm of glass material, the long 1260mm of external diameter 28mm.

Be presented above concrete embodiment, but the utility model is not limited to described embodiment.Basic ideas of the present utility model are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present utility model, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment when not departing from principle of the present utility model and spirit, amendment, replacement and modification still fall in protection domain of the present utility model.

Claims (7)

1. a cannula type soil moisture sensor, comprise pipe and sleeve pipe in sensor, in this sensor, pipe sets gradually at least one sensing unit of controlled processing unit and layered arrangement from top to bottom, described sensing unit comprises two copper ring electric capacity, a chip select circuit plate and a frequency collection unit, sensor outer wall of inner tube lays groove along its length, copper ring electric capacity welds with the pad face of frequency collection unit, be sleeved on groove, it is characterized in that, on described sensor outer wall of inner tube, interval setpoint distance lays groove along its length, the part that outer wall of inner tube does not arrange groove arranges at least one ring groove, described ring groove is arranged with the elastic ring for making interior pipe and sleeve pipe keep certain interval.
2. cannula type soil moisture sensor according to claim 1, is characterized in that, the cell wall of described ring groove is provided with the hole slot for facilitating elastic ring installation and removal.
3. cannula type soil moisture sensor according to claim 2, is characterized in that, the top of described sensing unit is provided with capillary groove.
4. cannula type soil moisture sensor according to claim 3, is characterized in that, arrange bottom described interior pipe one for coordinating with sleeve pipe time the top guide that play the guiding role, described top guide is connected with Internal Pipe Thread.
5. cannula type soil moisture sensor according to claim 4, is characterized in that, described elastic ring is divided into two-layer, and inner ring is rubber ring, outer ring is spring coil.
6. cannula type soil moisture sensor according to claim 5, is characterized in that, described interior pipe top is provided with a handle, and described handle and interior pipe are connected by screw.
7. cannula type soil moisture sensor according to claim 6, is characterized in that, described sleeve bottom arranges the waterproof end plug of a pyramidal structure, and described waterproof end plug is connected with seal with elastometic washer with between sleeve pipe.
CN201420775546.XU 2014-12-09 2014-12-09 A kind of cannula type soil moisture sensor CN204374133U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420775546.XU CN204374133U (en) 2014-12-09 2014-12-09 A kind of cannula type soil moisture sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420775546.XU CN204374133U (en) 2014-12-09 2014-12-09 A kind of cannula type soil moisture sensor

Publications (1)

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CN204374133U true CN204374133U (en) 2015-06-03

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105044287A (en) * 2015-07-28 2015-11-11 首都师范大学 Surface and soil water storage capacity integrated measuring instrument
CN105067681A (en) * 2015-07-28 2015-11-18 首都师范大学 Soil water storage capacity measuring instrument
CN105758901A (en) * 2016-02-25 2016-07-13 南京农业大学 Moisture measurement method and device of vertical section of farmland soil
CN106383216A (en) * 2015-07-26 2017-02-08 江苏中农物联网科技有限公司 Intelligent soil moisture quick-test device
CN106970122A (en) * 2017-05-02 2017-07-21 中国水利水电科学研究院 A kind of punching and measurement integrated device for soil moisture measurement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106383216A (en) * 2015-07-26 2017-02-08 江苏中农物联网科技有限公司 Intelligent soil moisture quick-test device
CN105044287A (en) * 2015-07-28 2015-11-11 首都师范大学 Surface and soil water storage capacity integrated measuring instrument
CN105067681A (en) * 2015-07-28 2015-11-18 首都师范大学 Soil water storage capacity measuring instrument
CN105044287B (en) * 2015-07-28 2017-03-08 首都师范大学 Earth's surface and soil storage integrated measuring instrument
CN105758901A (en) * 2016-02-25 2016-07-13 南京农业大学 Moisture measurement method and device of vertical section of farmland soil
CN105758901B (en) * 2016-02-25 2018-11-30 南京农业大学 Agricultural land soil vertical section moisture measuring method and device
CN106970122A (en) * 2017-05-02 2017-07-21 中国水利水电科学研究院 A kind of punching and measurement integrated device for soil moisture measurement

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