CN207516300U - A kind of capacity type soil humidity sensor - Google Patents
A kind of capacity type soil humidity sensor Download PDFInfo
- Publication number
- CN207516300U CN207516300U CN201721778754.5U CN201721778754U CN207516300U CN 207516300 U CN207516300 U CN 207516300U CN 201721778754 U CN201721778754 U CN 201721778754U CN 207516300 U CN207516300 U CN 207516300U
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- CN
- China
- Prior art keywords
- capacity type
- housing
- humidity sensor
- type soil
- soil humidity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of capacity type soil humidity sensors, including slice-shaped housing, power conversion module, relative humidity measuring circuit, capacitance probe and data-interface, the housing lower end is V-shaped point, the data-interface is located at the top of housing, the capacitance probe is located at the middle part of housing, the capacitance probe is connect with relative humidity measuring circuit, and the power conversion module is connect with relative humidity measuring circuit and data-interface.The capacity type soil humidity sensor compactization design of the utility model, it installs, operate and safeguards and is simple and easy to carry, can directly be placed into the soil middle use, it can realize the real-time measurement to soil moisture, it is and high resolution, adaptable, at low cost, have a wide range of application, it is stable and reliable for performance.
Description
Technical field
The utility model is related to a kind of sensors, and in particular to a kind of capacity type soil humidity sensor.Belong to soil spy
Survey technology field.
Background technology
When carrying out planting, the progress such as the fertility to soil, humidity, micronutrient levels and pH value are generally required
It measures, in order to better planting plants, development that can be more beneficial.Soil humidity sensor is that one kind is used to measure
The equipment of soil moisture, the measuring principle of different equipment applications are different.At present, the measuring method of common soil moisture
Have：Electric-resistivity method, capacitance method, oven drying method, SWR (standing wave frequency) etc..Electric-resistivity method and capacitance method are the dielectric properties using soil, indirectly
The water content of soil is measured, measuring speed is fast, the drawback is that the adaptability to soil is poor, it is more accurate in order to measure
Soil water content needs to establish calibration curve for each soil.Oven drying method is the traditional method of comparison, although its measurement accuracy
Compare high, but measurement period is long, does not apply to real-time and measures.The range that SWR methods use now is wider, but its multiple-pin type knot
Structure is unfavorable for being inserted into soil, yielding, perishable, can bring error to measurement.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and the soil water can be measured in real time by providing one kind
The capacity type soil humidity sensor divided.
To achieve the above object, the utility model uses following technical proposals：
A kind of capacity type soil humidity sensor is visited including slice-shaped housing, power conversion module, relative humidity measuring circuit, capacitance
Head and data-interface, the housing lower end are V-shaped point, and the data-interface is located at the top of housing, and the capacitance is visited
Head is located at the middle part of housing, and the capacitance probe is connect with relative humidity measuring circuit, the power conversion module and relative humidity measuring circuit and data
Interface connects.
Preferably, the angle of two stabilizer blades of V-shaped point is acute angle.
It is further preferred that the angle that the V-shaped point connects root stabilizer blade is 30 °~70 °.
Preferably, the both upper ends thereof of the housing has a pair of of groove.
Preferably, the capacitance probe includes a n shapes electrode and an I shape electrode, n shape electrodes are looped around I shape electrodes
Outside.
Preferably, the relative humidity measuring circuit includes 555 timers and peripheral circuit, and the peripheral circuit includes two pole of voltage stabilizing
Pipe,
Resistance and capacitance.
Preferably, the housing is PCB substrate.
Capacitance probe generates electric current using the dielectric property of soil, is transferred to relative humidity measuring circuit, is converted by relative humidity measuring circuit
Data-interface is transmitted to after pulse voltage signal, the data-interface is responsible for sensor power supply and receives the humidity simulation measured
Voltage signal, output area are 1.3V-2.8V, and with humidity inversely, soil moisture is higher, and output voltage is got over for voltage signal
It is low.
Data-interface is connected with microcontroller, and soil moisture value is read in programming.
The beneficial effects of the utility model：
1. the utility model uses measurement by capacitance technology, by the dielectric property of soil, the aqueous of soil is measured indirectly
Amount, measuring speed is fast, adaptable.
2. the capacitance probe lower end of the utility model is in the shape of the letter V, convenient for being inserted into soil, compact is installed and is tieed up
Shield is simple.
3. the utility model converts the current to pulse signal, is output to data and connects by measuring the dielectric property of soil
Mouthful, data-interface can directly be connected with microcontroller, and soil moisture value is read in programming, convenient, fast.
Description of the drawings
Fig. 1 is the integrated stand composition of the capacity type soil humidity sensor of the utility model embodiment；
Fig. 2 is the data-interface schematic diagram of the capacity type soil humidity sensor of the utility model embodiment；
Fig. 3 is the power conversion module schematic diagram of the sensor of the utility model embodiment；
Fig. 4 is the relative humidity measuring circuit schematic diagram of the sensor of the utility model embodiment；
Reference numeral：1- data-interfaces；2- power conversion modules；3- relative humidity measuring circuits；4- housings；5- capacitance probes；6- is recessed
Slot；7-V shape points；The first stabilizer blades of 8-；The second stabilizer blades of 9-；10- angles；11-U shape electrodes；12-I shape electrodes.
Specific embodiment
The utility model is further elaborated with reference to the accompanying drawings and examples, it should explanation, under state
It is bright merely to explain the utility model, its content is not defined.
Embodiment 1：
Capacity type soil humidity sensor, capacitance are influenced by soil moisture, form a resonant tank, this time
The resistance on road is influenced by capacitance, and so as to influence the voltage value of resonant tank acquirement, this voltage value passes through operational amplifier
After amplification, become the humidity negative correlation of the voltage signal that can be identified by microcontroller, this voltage signal and soil.
Fig. 1 is a kind of capacity type soil humidity sensor of the utility model embodiment, including slice-shaped housing 4, power supply
Modular converter 2, relative humidity measuring circuit 3, capacitance probe 5 and data-interface 1.
The shell 4 is PCB substrate, and the both upper ends thereof of the housing 4 has a pair of of groove 6；4 lower end of housing is V words
Shape point 7, convenient for being inserted into soil, compact, installation and maintenance are simple, the first stabilizer blade 8 of the V-shaped point 7
And the second angle 10 between stabilizer blade 9 is acute angle, the number of degrees are 60 °.
The data-interface 1 is located at the top of housing 4, and the capacitance probe 5 is located at the middle part of housing 4, and the capacitance is visited
First 5 connect with relative humidity measuring circuit 3, and the power conversion module 2 is connect with relative humidity measuring circuit 3 and data-interface 1, data-interface schematic diagram
As shown in Figure 2.Data-interface 1 is responsible for sensor and provides 5V power supplys and receive the humidity simulation signal measured.
Power conversion module include power conversion chip and peripheral circuit, peripheral circuit include capacitance C1, C2, C5 and
C6, power conversion module schematic diagram are as shown in Figure 3.Power conversion module 2 is responsible for the 5V voltages that data-interface 1 provides being converted into
3.3V powers to relative humidity measuring circuit.
The capacitance probe 5 includes a U-shaped electrode 11 and an I shapes electrode 12, U-shaped electrode 11 are looped around I shape electrodes
12 outsides.Capacitance probe 5 generates electric current using the dielectric property of soil, is transferred to relative humidity measuring circuit 3.
The relative humidity measuring circuit 3 includes 555 timers and peripheral circuit, and peripheral circuit includes zener diode T4, resistance
R1, R2, R3, R4 and capacitance C3, C4, relative humidity measuring circuit schematic diagram are as shown in Figure 4.Relative humidity measuring circuit 3 receives the electricity that capacitance probe 5 generates
Signal is flowed, and data-interface 1 is transmitted to after changing current signal into pulse voltage signal, exporting the range of analog voltage signal is
1.3V~2.8V.Data-interface 1 can be connected with microcontroller, and soil moisture value is read by programming.
Soil humidity sensor compact described in the present embodiment, install, operate and safeguard it is simple, easy to carry, can be straight
Middle use of placing into the soil is connect, can realize the real-time measurement to soil moisture, and high resolution, adaptable, at low cost, application
Range is wide, stable and reliable for performance.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but not to this practicality newly
The limitation of type protection domain, on the basis of the technical solution of the utility model, those skilled in the art do not need to pay creation
Property the various modifications or changes that can make of labour be still within the scope of the present invention.
Claims (7)
1. a kind of capacity type soil humidity sensor, which is characterized in that including slice-shaped housing, power conversion module, hygrometric electricity
Road, capacitance probe and data-interface, the housing lower end are V-shaped point, and the data-interface is located at the top of housing, institute
The middle part that capacitance probe is located at housing is stated, the capacitance probe is connect with relative humidity measuring circuit, the power conversion module and hygrometric electricity
Road is connected with data-interface.
A kind of 2. capacity type soil humidity sensor according to claim 1, which is characterized in that the V-shaped point
The angle of two stabilizer blades is acute angle.
A kind of 3. capacity type soil humidity sensor according to claim 1 or 2, which is characterized in that the V-shaped tip
The angle that portion connects root stabilizer blade is 30 °~70 °.
A kind of 4. capacity type soil humidity sensor according to claim 1, which is characterized in that the top two of the housing
End has a pair of of groove.
5. a kind of capacity type soil humidity sensor according to claim 1, which is characterized in that the capacitance probe includes
One n shapes electrode and an I shape electrode, n shape electrodes are looped around on the outside of I shapes electrode.
6. a kind of capacity type soil humidity sensor according to claim 1, which is characterized in that the relative humidity measuring circuit includes
555 timers and peripheral circuit, the peripheral circuit include zener diode, resistance and capacitance.
7. a kind of capacity type soil humidity sensor according to claim 1, which is characterized in that the housing is PCB bases
Plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721778754.5U CN207516300U (en) | 2017-12-19 | 2017-12-19 | A kind of capacity type soil humidity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721778754.5U CN207516300U (en) | 2017-12-19 | 2017-12-19 | A kind of capacity type soil humidity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207516300U true CN207516300U (en) | 2018-06-19 |
Family
ID=62544581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721778754.5U Expired - Fee Related CN207516300U (en) | 2017-12-19 | 2017-12-19 | A kind of capacity type soil humidity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207516300U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828029A (en) * | 2018-08-14 | 2018-11-16 | 天津大学 | Moisture percentage measuring apparatus based on plug-in capacitance sensor |
| WO2022034726A1 (en) * | 2020-08-12 | 2022-02-17 | 株式会社村田製作所 | Moisture detection sensor |
-
2017
- 2017-12-19 CN CN201721778754.5U patent/CN207516300U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828029A (en) * | 2018-08-14 | 2018-11-16 | 天津大学 | Moisture percentage measuring apparatus based on plug-in capacitance sensor |
| CN108828029B (en) * | 2018-08-14 | 2020-10-23 | 天津大学 | Moisture content measuring device based on plug-in capacitive sensor |
| WO2022034726A1 (en) * | 2020-08-12 | 2022-02-17 | 株式会社村田製作所 | Moisture detection sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180619 Termination date: 20201219 |