CN113494937A - Wireless paddy field water level and soil temperature and humidity sensor - Google Patents
Wireless paddy field water level and soil temperature and humidity sensor Download PDFInfo
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- CN113494937A CN113494937A CN202010264384.3A CN202010264384A CN113494937A CN 113494937 A CN113494937 A CN 113494937A CN 202010264384 A CN202010264384 A CN 202010264384A CN 113494937 A CN113494937 A CN 113494937A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/0007—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm for discrete indicating and measuring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
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Abstract
The invention belongs to the technical field of water level and temperature and humidity detection, and relates to a wireless paddy field water level and soil temperature and humidity sensor. The method comprises the following steps: the device comprises a cylinder cover, a control cylinder and a core sensing module; the cartridge cover comprises an antenna and a switch; the core sensing module comprises a water level sensing probe, a humidity sensing probe and a temperature sensing probe; the control cylinder comprises a circuit board and a battery, and a water level conduit channel is arranged in the center of the control cylinder; the circuit board comprises a main control chip, a wireless communication module and a sensing circuit module. The main control chip adopts an 8-bit singlechip with ultra-low power consumption; the wireless communication module adopts Zigbee wireless network transmission; the sensor circuit module comprises a humidity acquisition part, a temperature acquisition part and a water level acquisition part. The invention has the advantages of low cost, high precision, good reliability and the like, can realize long-term real-time online monitoring of temperature, humidity and water level, improves the agricultural planting efficiency and has better application prospect.
Description
Technical Field
The invention belongs to the technical field of water level and temperature and humidity detection, and relates to a wireless paddy field water level and soil temperature and humidity sensor.
Background
The growth of crops requires a proper environment, and the temperature, the humidity and the water level are the most important environmental factors for the normal growth of crops. Therefore, the accurate real-time mastering of the water level of the paddy field and the soil temperature and humidity data has important significance for agricultural production practice. The water level of a paddy field and the temperature and humidity of soil are monitored on line in real time, so that the agricultural investment is saved, and the proper soil moisture content is maintained; is beneficial to guiding farmers to irrigate reasonably, so that water resources are effectively utilized, and a good environment is created for the growth of crops.
Most temperature, humidity and water level sensors on the market at present generally have the problems of large power consumption, high cost, low automation degree and the like, are not suitable for long-term work in the field, and the actual application effect in the field of farmland monitoring still needs to be improved. Based on the wireless sensor, the wireless sensor for the water level of the paddy field and the temperature and humidity of the soil has the advantages of low power consumption, long service life, stable operation, real-time and accurate data transmission and the like, can realize the online monitoring of the water level of the paddy field and the temperature and humidity of the soil for a long time, meets the actual production requirement, and has a good application prospect.
Disclosure of Invention
Based on the above, the invention aims to provide the wireless paddy field water level and soil temperature and humidity sensor which can be applied to agriculture and has low cost, low power consumption, good timeliness, convenient installation and long-distance multipoint wireless communication.
The technical scheme of the invention is as follows:
the utility model provides a wireless paddy field water level and soil temperature and humidity sensor, its is used for wireless monitoring paddy field water level and soil temperature and humidity data, includes: the device comprises a cylinder cover, a control cylinder and a core sensing module; the cylinder cover is installed and connected to the upper end of the control cylinder body; the core sensing module is connected to the bottom end of the control cylinder through a clamping plate; the cartridge cover comprises a switch and an antenna; the control cylinder comprises a circuit board and a battery, and a water level conduit channel is arranged in the center of the control cylinder; the core sensing module comprises a water level sensing probe, a humidity sensing probe and a temperature sensing probe; the water level sensing probe is arranged in the water level guide pipe, and a water level probe is arranged at the lower end of the water level sensing probe; the humidity sensing probe and the temperature sensing probe are positioned on the opposite side of the lower section of the water level conduit; two resistance type alloy probes at the bottom of the humidity sensing probe penetrate through the bottom of the core sensing module; a platinum probe at the bottom of the temperature sensing probe penetrates through the bottom of the core sensing module, and a metal protective shell is sleeved outside the platinum probe and is sealed and fixed by a waterproof nut; the circuit board comprises a main control chip, a sensing circuit module and a wireless communication module.
The upper part of the cylinder cover is provided with a concave part, and the switch and the antenna are embedded in the concave part.
The control barrel is internally provided with a sunken part for installing a battery, two sides of the barrel wall are provided with a pair of PCB positioning sheets, and the rear side is provided with a circuit board.
Air pressure balance pipes are arranged on the side opposite edges of the water level guide pipe; the top end of the air pressure balance pipe is provided with an air pressure balance hole, the upper section of the air pressure balance pipe is communicated with the water level guide pipe, the middle section of the air pressure balance pipe is fixed at the center of the control cylinder body, and the lower section of the air pressure balance pipe is fixed with the temperature sensing probe shell and the humidity sensor probe shell by bolts.
The water level sensing probe is provided with water level probes with different lengths and the number of the water level probes larger than 1.
The core sensing module is provided with a reference identification ring outside for indicating the insertion depth of the sensor, and a water inlet hole is arranged in the middle.
The antenna is electrically connected with the wireless communication module and adopts a Zigbee network for wireless transmission; the humidity signal line and the temperature signal line respectively penetrate through the two threading holes at the bottom of the control cylinder body to be electrically connected with the sensing circuit module.
Preferably, the main control chip adopts an STM8L051 series ultra-low power consumption 8-bit singlechip.
Preferably, the water level sensing probe is provided with 6 water level probes, and the lengths of the water level probes are uniformly distributed in a range of 10-250 mm.
Preferably, the antenna can be used for carrying out multipoint wireless communication and finally uploading the data to a target server for storage.
Preferably, the platinum probe adopts a Pt100 high-precision four-wire platinum thermistor.
In conclusion, the beneficial effects of the invention are as follows:
1. the whole sensor has compact structural design, is not easy to damage and has small disturbance to crops;
2. the monitoring mode can be automatically switched, the humidity is measured when no water exists, and the water level is automatically switched and measured when water exists;
3. when a plurality of sensors work simultaneously, a wireless transmission network can be automatically established, and the data transmission distance is increased;
4. the ultra-low power consumption single chip microcomputer and peripheral devices are adopted, the sensor works in a dormant low power consumption state most of the time in a fixed data acquisition period, and the service time of a battery is prolonged;
5. the sensor can monitor the water level with the discontinuous height in 250mm, and can meet the use requirements in the field of most agricultural water levels.
Drawings
Fig. 1 is a perspective view schematically illustrating an embodiment of the present invention.
Fig. 2 is a schematic perspective view of the control cylinder according to the present invention.
FIG. 3 is an internal cross-sectional view of a core sensing module of the present invention.
In the figure: 1. a cylinder cover; 2. a control cylinder; 3. a core sensing module; 4. a platinum probe; 5. an alloy probe; 6. a reference identification ring; 7. a switch; 8. an antenna; 9, PCB locating plates; 10. a circuit board; 11. a water level sensing probe; 12. a main control chip; 13. a pressure balance tube; 14. threading holes; 15. an air pressure balancing hole; 16. a battery; 17. a water level probe; 18. a water level conduit; 19. a humidity signal line; 20. a humidity sensing probe; 21. a waterproof nut; 22. a temperature sensing probe; 23. a water inlet hole; 24. clamping a plate; 25. a temperature signal line.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying fig. 1-3, and the invention will be further explained in detail.
The utility model provides a wireless paddy field water level and soil temperature and humidity sensor, its is used for wireless monitoring paddy field water level and soil temperature and humidity data, includes: the device comprises a cylinder cover 1, a control cylinder 2 and a core sensing module 3; the cylinder cover 1 is installed and connected to the upper end of the control cylinder body 2; the core sensing module 3 is connected to the bottom end of the control cylinder 2 through a clamping plate 24; the cartridge cover 1 comprises a switch 7 and an antenna 8; the control cylinder 2 comprises a circuit board 10 and a battery 16, and a water level conduit 18 channel is arranged in the center; the core sensing module 3 comprises a water level sensing probe 11, a humidity sensing probe 20 and a temperature sensing probe 22; the water level sensing probe 11 is arranged in the water level conduit 18, and the lower end of the water level sensing probe is provided with a water level probe 17; the humidity sensing probe 20 and the temperature sensing probe 22 are positioned at the opposite side of the lower section of the water level conduit 18; two resistance type alloy probes 5 at the bottom of the humidity sensing probe 20 penetrate through the bottom of the core sensing module 3; a platinum probe 4 at the bottom of the temperature sensing probe 22 penetrates through the bottom of the core sensing module 3, and a metal protective shell is sleeved outside the platinum probe 4 and is sealed and fixed by a waterproof nut 21; the circuit board 10 includes a main control chip 12, a sensing circuit module and a wireless communication module.
The upper part of the cover 1 is provided with a recessed part in which a switch 7 and an antenna 8 are embedded.
The control cylinder 2 is internally provided with a sunken part for installing a battery 16, a pair of PCB positioning sheets 9 are arranged on two sides of the cylinder wall, and a circuit board 10 is arranged on the rear side.
The air pressure balance pipes 13 are arranged on the opposite sides of the water level guide pipes 18; the top end of the air pressure balance pipe 13 is provided with an air pressure balance hole 15, the upper section of the air pressure balance hole is communicated with the water level guide pipe 18, the middle section of the air pressure balance pipe is fixed at the center of the control cylinder 2, and the lower section of the air pressure balance pipe is fixed with the shell of the temperature sensing probe 22 and the shell of the humidity sensor probe 20 by bolts.
The water level sensing probe 11 is provided with water level probes 17 with different lengths and the number larger than 1.
The outside of the core sensing module 3 is provided with a reference identification ring 6 for indicating the insertion depth of the sensor, and the middle part is provided with a water inlet hole 23.
The antenna 8 is electrically connected with the wireless communication module and adopts a Zigbee network for wireless transmission; the humidity signal line 19 and the temperature signal line 25 respectively pass through the two threading holes 14 at the bottom of the control cylinder 2 to be electrically connected with the sensing circuit module.
The wireless paddy field water level and soil temperature and humidity sensor comprises the following use steps:
a, vertically inserting a platinum probe 4 and an alloy probe 5 into a position to be detected;
b, continuously adjusting the position of the sensor to enable the part below the reference identification ring 6 to be completely buried in the soil, ensuring that the reference identification ring 6 and the surrounding soil are on the same plane, and reinforcing after confirmation;
c, opening a top switch 7, and starting the sensor to work;
d, starting to measure the temperature, the humidity or the water level, and feeding back a detection value to the main control chip 12;
e, repeating the step d, and detecting the environment for multiple times to ensure the reliability of the data;
f, the main control chip 12 performs algorithms such as verification and validity judgment on the data, then takes an average value, and sends the water level and temperature and humidity data to the remote service base station through the wireless communication module;
g, the sensor enters a dormant state;
and h, setting sampling interval time as required, and repeating the steps d-g to realize real-time monitoring of data.
In the invention, the principle of the sensor is as follows: the sensing circuit module is integrally divided into a humidity acquisition part, a temperature acquisition part and a water level acquisition part. The humidity acquisition part is formed by sequentially connecting a humidity probe, a voltage division bias circuit and an operational amplifier. The pair of humidity probes are made of special metal alloy, are acid and alkali resistant, and obtain the resistivity under different humidities in a mode of simulating resistance. The temperature acquisition part circuit adopts a three-wire connection method of a constant current source; the platinum resistor output lead is connected with IN-of the instrument amplifier AD620, supports the measurement temperature range from minus 20 ℃ to plus 70 ℃, and meets most use scenes. The water level acquisition part adopts a plurality of 304 stainless steel electrodes, detects the height of the water level by utilizing the conductivity of liquid, generates a potential signal when the water level rises to touch the bottom end of the electrode, and inputs the water level signal into the main control chip through the Schmidt trigger to be processed, thus obtaining the corresponding water level relation. And finally, all data are sent to a remote service base station for processing and displaying through a wireless communication transmission module.
The embodiments described above with reference to the drawings are illustrative only and should not be construed as limiting the invention; it would be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (7)
1. The utility model provides a wireless paddy field water level and soil temperature and humidity sensor, its is used for wireless monitoring paddy field water level and soil temperature and humidity data, includes: the device comprises a cylinder cover (1), a control cylinder body (2) and a core sensing module (3); the cylinder cover (1) is installed and connected to the upper end of the control cylinder body (2); the core sensing module (3) is connected to the bottom end of the control cylinder (2) through a clamping plate (24); the cylinder cover (1) comprises a switch (7) and an antenna (8); the control cylinder (2) comprises a circuit board (10) and a battery (16), and a water level conduit (18) channel is arranged in the center; the core sensing module (3) comprises a water level sensing probe (11), a humidity sensing probe (20) and a temperature sensing probe (22); the water level sensing probe (11) is arranged in the water level conduit (18), and the lower end of the water level sensing probe is provided with a water level probe (17); the humidity sensing probe (20) and the temperature sensing probe (22) are positioned on the opposite sides of the lower section of the water level conduit (18); two resistance type alloy probes (5) at the bottom of the humidity sensing probe (20) penetrate through the bottom of the core sensing module (3); a platinum probe (4) at the bottom of the temperature sensing probe (22) penetrates through the bottom of the core sensing module (3), and a metal protective shell is sleeved outside the platinum probe (4) and is sealed and fixed by a waterproof nut (21); the circuit board (10) comprises a main control chip (12), a sensing circuit module and a wireless communication module.
2. The wireless paddy field water level and soil temperature and humidity sensor of claim 1, which is characterized in that: the upper part of the cylinder cover (1) is provided with a concave part, and a switch (7) and an antenna (8) are embedded into the concave part.
3. The wireless paddy field water level and soil temperature and humidity sensor of claim 1, which is characterized in that: the control cylinder (2) is internally provided with a sunken part for installing a battery (16), a pair of PCB positioning sheets (9) are arranged on two sides of the cylinder wall, and a circuit board (10) is arranged on the rear side.
4. The wireless paddy field water level and soil temperature and humidity sensor of claim 1, which is characterized in that: air pressure balance pipes (13) are arranged on the side opposite edges of the water level guide pipe (18); the top end of the air pressure balance pipe (13) is provided with an air pressure balance hole (15), the upper section of the air pressure balance pipe is communicated with the water level guide pipe (18), the middle section of the air pressure balance pipe is fixed at the center of the control cylinder body (2), and the lower section of the air pressure balance pipe is fixed with the shell of the temperature sensing probe (22) and the shell of the humidity sensor probe (20) by bolts.
5. The wireless paddy field water level and soil temperature and humidity sensor of claim 1, which is characterized in that: the water level sensing probe (11) is provided with water level probes (17) with different lengths and the number larger than 1.
6. The wireless paddy field water level and soil temperature and humidity sensor of claim 1, which is characterized in that: the core sensing module (3) is provided with a reference identification ring (6) outside for indicating the insertion depth of the sensor, and a water inlet hole (23) in the middle.
7. The wireless paddy field water level and soil temperature and humidity sensor of claim 1, which is characterized in that: the antenna (8) is electrically connected with the wireless communication module and adopts a Zigbee network for wireless transmission; the humidity signal line (19) and the temperature signal line (25) respectively penetrate through the two threading holes (14) at the bottom of the control cylinder body (2) and are electrically connected with the sensing circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264384.3A CN113494937A (en) | 2020-04-07 | 2020-04-07 | Wireless paddy field water level and soil temperature and humidity sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264384.3A CN113494937A (en) | 2020-04-07 | 2020-04-07 | Wireless paddy field water level and soil temperature and humidity sensor |
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| CN113494937A true CN113494937A (en) | 2021-10-12 |
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| CN202010264384.3A Pending CN113494937A (en) | 2020-04-07 | 2020-04-07 | Wireless paddy field water level and soil temperature and humidity sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116358661A (en) * | 2023-06-01 | 2023-06-30 | 山东省林业科学研究院 | Water seepage depth measuring device and measuring method |
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2020
- 2020-04-07 CN CN202010264384.3A patent/CN113494937A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116358661A (en) * | 2023-06-01 | 2023-06-30 | 山东省林业科学研究院 | Water seepage depth measuring device and measuring method |
| CN116358661B (en) * | 2023-06-01 | 2023-08-04 | 山东省林业科学研究院 | Water seepage depth measuring device and measuring method |
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