CN110220949A - A kind of condenser type multi-layer Soil humidity detector - Google Patents
A kind of condenser type multi-layer Soil humidity detector Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 58
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- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 5
- 238000007600 charging Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000012271 agricultural production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 229920003023 plastic Polymers 0.000 description 2
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- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000010413 gardening Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/245—Earth materials for agricultural purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
A kind of condenser type multi-layer Soil humidity detector proposed by the present invention, comprising: shell, enclosure interior are equipped with bracket, are equipped with multiple humicaps on the bracket；Capacity type soil humidity conversion circuit is additionally provided in the shell, the humicap is connect with capacity type soil humidity conversion circuit.During the present invention places into the soil, according to output pulse frequency, the temperature and humidity of real-time detection multi-layer Soil.
Description
Technical field
The present invention relates to technical field of electronic equipment, more particularly to a kind of condenser type multi-layer Soil Humidity Detection
Device.
Background technique
Agricultural production occupies an important position in China's economic development.Along with the continuous growth of China human mortality, industry
Fast development, freshwater resources consumption increases, and cultivated area reduces, agricultural production and soil, water resource contradiction increasingly
It is prominent.Wherein, how under limited conditions, water resource is rationally efficiently utilized, one of the focus of agricultural development will be become.Largely
Experimental study shows: the plantations such as booth vegetable, greenhouse flowers, horticultural gardening industry has very high requirement to soil moisture, soil
Earth humidity is unreasonable, cannot not only make quick growth of plant, will lead to plant drought and waterlogging what is more and dead, brings to agricultural economy
Heavy losses.And in the efficient and rational utilization of water resource, the detection of soil moisture is important link.
The mode that traditional type acquires multi-layer Soil humidity is probe-type detection method, and each probe surveys the wet of some depth
Degree.When surveying multi-layer Soil humidity, several probes need to be placed on to the soil horizon of different depth.Before test, need to dig out a depth
Probe, such mode, construction and installation probe complexity are placed in hole on the different depth of dell side wall.And these scattered layouts
Probe, need to be separately connected circuit, acquire data, handle data, upload data etc..The volume of whole system is big, scattered distribution
Probe extremely circuit system, installation maintenance is often very complicated, and use is highly inconvenient.
Summary of the invention
In view of the above problems, the purpose of the present invention is to provide a kind of condenser type multi-layer Soil humidity detectors.
The present invention to achieve the above object, is achieved through the following technical solutions: a kind of condenser type multi-layer Soil Humidity Detection
Device, comprising: the tapered shell in lower end, enclosure interior are equipped with bracket, are equipped at intervals with from top to bottom on the bracket multiple
Humicap；Capacity type soil humidity conversion circuit, the humicap and capacity type soil humidity are additionally provided in the shell
Conversion circuit connection；
Further, the capacity type soil humidity conversion circuit include: single-shot trigger circuit, waveform shaping circuit,
Square-wave signal conversion circuit and Chip Microcomputer A/D Acquisition Circuit；The single-shot trigger circuit, waveform shaping circuit, square-wave signal turn
It changes circuit and Chip Microcomputer A/D Acquisition Circuit is sequentially connected；Single-shot trigger circuit is used for the collected capacitance variations side of being converted into
The variation of wave frequency rate is simultaneously output to waveform shaping circuit；The waveform shaping circuit is used to carry out whole wave to waveform, improves waveform
Steep and burr；The high-frequency square-wave signal that the square-wave signal conversion circuit is used to export waveform shaping circuit turns
It changes into and low-frequency facilitates signal；Chip Microcomputer A/D Acquisition Circuit is acquired low frequency square wave by single-chip microcontroller, passes through measurement
Duty ratio calculates the humidity value of soil.
Further, the single-shot trigger circuit includes: timer U3, resistance R10, resistance R11, resistance R12, resistance
R14, capacitor C5, capacitor C6, capacitor C9, humicap P4；The first foot of timer U3, the second end of capacitor C6 are grounded respectively；
The crus secunda of timer U3 is electric with the 6th foot of timer U3, the second end of resistance R12, the first end of capacitor C9, wet sensitive respectively
Hold the first end connection of P4；The third foot of timer U3 is connect with the first end of resistance R14；The 4th foot of timer U3, timing
The octal of device U3, the first end of resistance R10, the first end of resistance R11, the first end of capacitor C5 connect to power supply respectively；It is fixed
When device U3 the 5th foot connect with the first end of capacitor C6；The 7th foot of timer U3 respectively with the second end of resistance R10, resistance
The first end of R12 connects；The second end of humicap P4, the first end of capacitor C9 are grounded respectively；The second end and electricity of resistance R14
Hinder the second end connection of R11；The second end of capacitor C5 is grounded.
Further, the waveform shaping circuit includes: Schmidt trigger U5, capacitor C8；The of Schmidt trigger U5
Two feet are connect with the second end of resistance R14, and the third foot ground connection of Schmidt trigger U5, the 4th foot of Schmidt trigger U5 connects
Ground, the 5th foot of Schmidt trigger U5, the first end of capacitor C8 connect to power supply respectively, the second end ground connection of capacitor C8.
Further, the square-wave signal conversion circuit includes: counter U4, resistance R13, resistance R15, capacitor C7；It counts
The third foot of device U4 is connect with the first end of resistance R13, and the second end of resistance R13 is connect with Chip Microcomputer A/D Acquisition Circuit；It counts
The octal of device U4, the 11st foot of counter U4 are grounded respectively；The tenth foot of counter U4 is connect with the second end of resistance R15,
The first end of resistance R15 is connect with the 4th foot of Schmidt trigger U5；The first end of the 16th foot of counter U4, capacitor C7
It connects to power supply respectively, the second end ground connection of capacitor C7.
Further, the Chip Microcomputer A/D Acquisition Circuit includes single-chip microcontroller U1 and resistance R1；The first foot of the single-chip microcontroller U1
It is connect with the first end of resistance R1, the second end ground connection of resistance R1；The 5th foot of single-chip microcontroller U1 connects to power supply, single-chip microcontroller U1's
6th foot is connect with the second end of resistance R13；The 7th foot of single-chip microcontroller U1 is connect with digital temperature sensor；The of single-chip microcontroller U1
Octal sends pin with the data of multistage communication circuit and connect, the data receiver of the 9th foot and multistage communication circuit of single-chip microcontroller U1
Pin connection；The 15th foot of single-chip microcontroller U1 is grounded, and the 16th foot of single-chip microcontroller U1 connects to power supply.
Further, the humicap includes 2 electrodes, and the electrode is becket, with default between the becket
Spacing is fixedly mounted on bracket with one heart.
Further, temp probe is additionally provided in the shell, the temp probe is mounted between two beckets.
Further, wireless communication module, circuit board, power interface, sheet metal and spring are additionally provided in the shell, it is described
Wireless communication module and circuit board are fixedly mounted on bracket；The circuit board is for being arranged capacity type soil humidity conversion electricity
Road；The temp probe is mounted among two beckets, and position corresponding with temp probe is equipped with through-hole on the shell, is led to
Hole is equipped with sheet metal, and one end of temp probe is fixed on circuit boards by spring, and the other end of temp probe is by spring
It is contacted after elastic force effect with sheet metal；The power interface is fixedly mounted in the upper housing, wireless communication module, temp probe point
It is not connect with circuit board.
Further, the shell uses insulating material.Plastics or ceramics can be used in insulating material；The shell lower end
It is tapered.
The prior art is compared, the beneficial effects of the invention are that: the present invention provides a kind of inspections of condenser type multi-layer Soil humidity
Device, the capacity type soil humidity conversion circuit in shell are surveyed, humicap conspires to create cylindrical shape using multiple metal central spacers.Gold
Belong to ring to be concentrically mounted on bracket.Capacity type soil humidity conversion circuit is also mounted on bracket by circuit board.Multiple metals
Ring is distributed at the different height of shell, and device is inserted into one dell of soil, the soil of each pair of becket detection respective heights
Humidity.Capacitor is formed between two beckets, soil serves as the dielectric of two metal interannulars.Soil moisture is different, as electricity
The dielectric constant of medium is different, and dielectric constant influences the charging time of capacitor.Etc. capacitor chargings to a certain extent, can discharge.Gold
Cycle charging-discharge process when belonging to ring work.Certain interval of time electric discharge, externally exports the pulse of certain frequency.Soil moisture shadow
Ring the frequency of output pulse.Because soil moisture changes at any time with weather, weather etc., during the present invention places into the soil, according to output arteries and veins
Rush frequency, the temperature and humidity of real-time detection soil.
Capacity type soil humidity conversion circuit is to capacitor charging.It is converted by single-shot trigger circuit, dielectric constant
Difference is converted to the different pulse of frequency.Specifically: firstly, single-shot trigger circuit constitutes capacitive frequency change-over circuit, it will be electric
The variation of appearance is converted into the variation of frequency.Then, whole wave is carried out to waveform, improves the steep and burr of waveform.Due to height
The square wave single-chip microcontroller of frequency can not be acquired, and the square-wave signal of high frequency is converted into low-frequency square wave by counter and is believed
Number.Finally, low frequency square wave is acquired by single-chip microcontroller, by measuring the difference of duty ratio (high level lasting time /),
Measure the situation of change of humidity.
It can be seen that the configuration of the present invention is simple is reasonable, and it is easy for installation, as long as being inserted into one dell of soil when use, often
It can be detected the soil moisture of respective heights to becket, compared with prior art, the present invention having substantive distinguishing features outstanding
And significant progress, beneficial effects of its implementation are also obvious.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Attached drawing 1 is main view of the invention.
Attached drawing 2 is left view of the invention.
Attached drawing 3 is temp probe mounting structure schematic diagram of the invention.
Attached drawing 4 is circuit diagram of the invention.
Attached drawing 5 is Chip Microcomputer A/D Acquisition Circuit structure chart
In figure, 1 is power interface, and 2 be wireless communication module, and 3 be circuit board, and 4 be bracket, and 5 be shell, and 6 be becket,
7 be temp probe, 7-1 sheet metal, 7-2 spring.
Specific embodiment
It explains with reference to the accompanying drawing to a specific embodiment of the invention.
A kind of condenser type multi-layer Soil humidity detector as shown in Figure 1 and Figure 2, comprising: the tapered insulation shell in lower end
Body 5 is equipped with bracket 4, wireless communication module 2, circuit board 3, temp probe 7 and power interface 1 inside shell 5, in the bracket
On multiple humicaps are equipped at intervals with pre-determined distance from top to bottom, the humicap includes 2 electrodes, and the electrode is gold
Belong to ring 6, is fixedly mounted on bracket 4 with one heart between the every two becket 6 with default spacing.Wireless communication module 2 and electricity
Road plate 3 is fixedly mounted on bracket 4, and capacity type soil humidity conversion circuit, humicap and capacitor are provided on circuit board 3
The connection of formula soil moisture conversion circuit；The temp probe 7 is mounted on circuit board 3；The power interface 1 is fixedly mounted on shell
5 top of body, wireless communication module 2, temp probe 7 are connect with circuit board 3 respectively.
As shown in Figure 2 and Figure 3, it is electrically connected between the becket 6 and circuit board 3, facilitates collection voltages data.The shell
It is equipped with wireless communication module 2 in body 5, the signal of circuit board 3 is sent to server by wireless network.Shell is using insulation
Body, such as: plastics, ceramics.The power interface of connection power supply is equipped in shell, power supply can be used solar energy, wind energy, outdoor is facilitated to make
With.The temp probe 7 is mounted among two beckets 6, and 7 one end of temp probe is fixed spring 7- on circuit boards
2 head on, and the other end of temp probe 7 is acted on by elastic force to be contacted with the sheet metal 7-1 on shell, and the sheet metal 7-1 is located at shell
In through-hole on body, sheet metal is contacted with soil, is facilitated and is conducted the soil moisture to temp probe 7, for detecting the soil moisture,
It is electrically connected between temp probe 7 and circuit board 3, facilitates temperature collection data.
As shown in Figure 4, Figure 5, capacity type soil humidity conversion circuit include: single-shot trigger circuit, waveform shaping circuit,
Square-wave signal conversion circuit and Chip Microcomputer A/D Acquisition Circuit；The single-shot trigger circuit, waveform shaping circuit, square-wave signal turn
It changes circuit and Chip Microcomputer A/D Acquisition Circuit is sequentially connected.
Single-shot trigger circuit is for being converted into the variation of square wave frequency for collected capacitance variations and being output to waveform
Shaping circuit；It specifically includes: timer U3, resistance R10, resistance R11, resistance R12, resistance R14, capacitor C5, capacitor C6, capacitor
C9, humicap P4；The first foot of timer U3, the second end of capacitor C6 are grounded respectively；The crus secunda of timer U3 respectively with
The 6th foot of timer U3, the second end of resistance R12, the first end of capacitor C9, the connection of the first end of humicap P4；Timer
The third foot of U3 is connect with the first end of resistance R14；The 4th foot of timer U3, the octal of timer U3, resistance R10
One end, the first end of resistance R11, the first end of capacitor C5 connect to power supply respectively；The 5th foot of timer U3 is with capacitor C6's
First end connection；The 7th foot of timer U3 is connect with the first end of the second end of resistance R10, resistance R12 respectively；Humicap
The second end of P4, the first end of capacitor C9 are grounded respectively；The second end of resistance R14 is connect with the second end of resistance R11；Capacitor C5
Second end ground connection.Wherein, timer U3 uses TLC555 timer, and power supply uses 3.3V power supply, and the resistance value of resistance R10 is
The resistance value of 49.4K Ω, resistance R1 are 1M Ω, and the resistance value of resistance R12 is 560K Ω, and the resistance value of resistance R14 is 1K Ω, capacitor C5's
Capacitance is 100nF, and the capacitance of capacitor C6 is 100nF, and the capacitance of capacitor C9 is 470nF.
Waveform shaping circuit is used to carry out whole wave to waveform, improves the steep and burr of waveform；It specifically includes: Shi Mi
Special trigger U5, capacitor C8；The crus secunda of Schmidt trigger U5 is connect with the second end of resistance R14, Schmidt trigger U5
Third foot ground connection, the 4th foot ground connection of Schmidt trigger U5, the first end of the 5th foot of Schmidt trigger U5, capacitor C8
It connects to power supply respectively, the second end ground connection of capacitor C8.Schmidt trigger U5 is slow using 74LVC1G17 single channel schmidt trigger
Device is rushed, the capacitance of capacitor C8 is 100nF.
Square-wave signal conversion circuit is low-frequency for the high-frequency square-wave signal that waveform shaping circuit exports to be converted into
Facilitate signal；It specifically includes: counter U4, resistance R13, resistance R15, capacitor C7；The third foot of counter U4 is with resistance R13's
First end connection, the second end of resistance R13 are connect with Chip Microcomputer A/D Acquisition Circuit；The octal of counter U4, counter U4
11st foot is grounded respectively；The tenth foot of counter U4 is connect with the second end of resistance R15, the first end of resistance R15 and Schmidt
The 4th foot of trigger U5 connects；The 16th foot of counter U4, the first end of capacitor C7 connect to power supply respectively, capacitor C7's
Second end ground connection.Wherein, counter U4 uses MC14020B counter, and the resistance value of resistance R13 is 1K Ω, the resistance value of resistance R15
For 1K Ω, the capacitance of capacitor C7 is 100nF.
Chip Microcomputer A/D Acquisition Circuit is acquired low frequency square wave by single-chip microcontroller, is calculated and is unearthed by measurement duty ratio
The humidity value of earth.It specifically includes: single-chip microcontroller U1 and resistance R1；The first foot of the single-chip microcontroller U1 and the first end of resistance R1 connect
It connects, the second end ground connection of resistance R1；The 5th foot of single-chip microcontroller U1 connects to power supply, and the 6th foot of single-chip microcontroller U1 is with resistance R13's
Second end connection；The 7th foot of single-chip microcontroller U1 is connect with the digital temperature sensor of model DS18B20；The 8th of single-chip microcontroller U1
Foot sends pin with the data of multistage communication circuit and connect, and the data receiver of the 9th foot and multistage communication circuit of single-chip microcontroller U1 draws
Foot connection；The 15th foot of single-chip microcontroller U1 is grounded, and the 16th foot of single-chip microcontroller U1 connects to power supply.Wherein, single-chip microcontroller U1 is used
The single-chip microcontroller of model STM32F030F4P6, the resistance value of resistance R1 are 1K Ω.
With reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, this field
Technical staff can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
Claims (10)
1. a kind of condenser type multi-layer Soil humidity detector characterized by comprising shell, enclosure interior are equipped with bracket,
Multiple humicaps are equipped at intervals on the bracket；Capacity type soil humidity conversion circuit is additionally provided in the shell, it is described wet
Quick capacitor is connect with capacity type soil humidity conversion circuit.
2. condenser type multi-layer Soil humidity detector according to claim 1, which is characterized in that the condenser type soil
Humidity conversion circuit includes: single-shot trigger circuit, waveform shaping circuit, square-wave signal conversion circuit and Chip Microcomputer A/D acquisition electricity
Road；The single-shot trigger circuit, waveform shaping circuit, square-wave signal conversion circuit and Chip Microcomputer A/D Acquisition Circuit successively connect
It connects；Single-shot trigger circuit is for being converted into the variation of square wave frequency for collected capacitance variations and being output to waveform shaping electricity
Road；The waveform shaping circuit is used to carry out whole wave to waveform, improves the steep and burr of waveform；The square-wave signal turns
It changes circuit and low-frequency facilitates signal for the high-frequency square-wave signal that waveform shaping circuit exports to be converted into；Chip Microcomputer A/D is adopted
Collector is acquired low frequency square wave by single-chip microcontroller, and the humidity value of soil is calculated by measuring duty ratio.
3. condenser type multi-layer Soil humidity detector according to claim 1, which is characterized in that the monostable trigger
Circuit includes: timer U3, resistance R10, resistance R11, resistance R12, resistance R14, capacitor C5, capacitor C6, capacitor C9, wet sensitive electricity
Hold P4；
The first foot of timer U3, the second end of capacitor C6 are grounded respectively；The crus secunda of timer U3 is respectively with timer U3's
6th foot, the second end of resistance R12, the first end of capacitor C9, the connection of the first end of humicap P4；The third foot of timer U3
It is connect with the first end of resistance R14；The 4th foot, the octal of timer U3, the first end of resistance R10, resistance of timer U3
The first end of R11, the first end of capacitor C5 connect to power supply respectively；The 5th foot of timer U3 and the first end of capacitor C6 connect
It connects；The 7th foot of timer U3 is connect with the first end of the second end of resistance R10, resistance R12 respectively；
The second end of humicap P4, the first end of capacitor C9 are grounded respectively；The second end of resistance R14 and the second of resistance R11
End connection；The second end of capacitor C5 is grounded.
4. condenser type multi-layer Soil humidity detector according to claim 2, which is characterized in that the waveform shaping electricity
Road includes: Schmidt trigger U5, capacitor C8；The crus secunda of Schmidt trigger U5 is connect with the second end of resistance R14, Shi Mi
The third foot of special trigger U5 is grounded, the 4th foot ground connection of Schmidt trigger U5, the 5th foot, the capacitor of Schmidt trigger U5
The first end of C8 connects to power supply respectively, the second end ground connection of capacitor C8.
5. condenser type multi-layer Soil humidity detector according to claim 3, which is characterized in that the square-wave signal turns
Changing circuit includes: counter U4, resistance R13, resistance R15, capacitor C7；
The third foot of counter U4 is connect with the first end of resistance R13, and the second end and Chip Microcomputer A/D Acquisition Circuit of resistance R13 connects
It connects；The octal of counter U4, the 11st foot of counter U4 are grounded respectively；The second of the tenth foot of counter U4 and resistance R15
End connection, the first end of resistance R15 are connect with the 4th foot of Schmidt trigger U5；The 16th foot, the capacitor C7 of counter U4
First end connect to power supply respectively, the second end of capacitor C7 ground connection.
6. condenser type multi-layer Soil humidity detector according to claim 4, which is characterized in that the Chip Microcomputer A/D is adopted
Collector includes: single-chip microcontroller U1 and resistance R1；The first foot of the single-chip microcontroller U1 is connect with the first end of resistance R1, resistance R1's
Second end ground connection；The 5th foot of single-chip microcontroller U1 connects to power supply, and the 6th foot of single-chip microcontroller U1 is connect with the second end of resistance R13；
The 15th foot of single-chip microcontroller U1 is grounded, and the 16th foot of single-chip microcontroller U1 connects to power supply.
7. condenser type multi-layer Soil humidity detector according to claim 1, it is characterised in that: the humicap packet
2 electrodes are included, the electrode is becket, is fixedly mounted on bracket with one heart between the becket with default spacing.
8. condenser type multi-layer Soil humidity detector according to claim 7, it is characterised in that: also set in the shell
There are temp probe, the temp probe to be mounted between two beckets.
9. condenser type multi-layer Soil humidity detector according to claim 8, it is characterised in that: also set in the shell
There are wireless communication module, circuit board, power interface, sheet metal and spring, the wireless communication module and the fixed peace of circuit board
On bracket；The circuit board is for being arranged capacity type soil humidity conversion circuit；The temp probe is mounted on two gold
Belong to ring among, on the shell position corresponding with temp probe be equipped with through-hole, through-hole be equipped with sheet metal, the one of temp probe
End is fixed on circuit boards by spring, and the other end of temp probe contacts after by the elastic force effect of spring with sheet metal；It is described
Power interface is fixedly mounted in the upper housing, and wireless communication module, temp probe are connect with circuit board respectively.
10. condenser type multi-layer Soil humidity detector according to claim 1, it is characterised in that: the shell uses
Insulating material, the shell lower end are tapered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910655639.6A CN110220949A (en) | 2019-07-19 | 2019-07-19 | A kind of condenser type multi-layer Soil humidity detector |
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| CN201910655639.6A CN110220949A (en) | 2019-07-19 | 2019-07-19 | A kind of condenser type multi-layer Soil humidity detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763823A (en) * | 2019-11-22 | 2020-02-07 | 威海精讯畅通电子科技有限公司 | Handheld rapid soil detector and detection method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763823A (en) * | 2019-11-22 | 2020-02-07 | 威海精讯畅通电子科技有限公司 | Handheld rapid soil detector and detection method |
| CN110763823B (en) * | 2019-11-22 | 2022-04-12 | 威海精讯畅通电子科技有限公司 | Handheld rapid soil detector and detection method |
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Application publication date: 20190910 |