CN111964627A - Plant stem diameter wireless sensor network monitoring device - Google Patents
Plant stem diameter wireless sensor network monitoring device Download PDFInfo
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- CN111964627A CN111964627A CN201910415998.4A CN201910415998A CN111964627A CN 111964627 A CN111964627 A CN 111964627A CN 201910415998 A CN201910415998 A CN 201910415998A CN 111964627 A CN111964627 A CN 111964627A
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- plant stem
- diameter
- monitoring device
- angle
- network monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/10—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
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Abstract
The invention discloses a plant stem diameter wireless sensor network monitoring device, which comprises suckers, supporting arms, spring rings and angle sensors, wherein a pair of suckers can be clamped at two ends of the diameter of a plant stem, the suckers are connected to the top ends of the supporting arms through rotating shafts, the bottom ends of the left supporting arm and the right supporting arm are respectively connected with a rotating shaft and a fixed shaft of the angle sensor, the left supporting arm can drive the rotating shaft of the angle sensor to rotate together, the spring rings are sleeved and fixed on the supporting arms, the device presents the diameter increase amount of the plant stem in the form of angle expansion change, the sensors are connected with an A/D pin of a collecting node circuit to convert angle change information into voltage signals, measuring data are fitted into a conversion formula between the angle change value and the diameter value, the collected angle change amount is converted into the diameter value through a program, and the diameter value signals are wirelessly transmitted, and the gateway sends the data to the cloud platform through the 4G network, and finally, the data is displayed and stored at the remote PC terminal.
Description
Technical Field
The invention relates to the field of facility agricultural engineering, in particular to an intelligent monitoring device for a crop plant stem diameter wireless sensor network.
Background
China is a big agricultural country, with the rapid development of economic strength of China, the development scale of facility agriculture of China is continuously enlarged, although the facility agriculture area of China is at the top of the world, the facility agriculture of China has a single and lagged development mode, the technology content level of the facility agriculture is not high, and the requirements of intelligent agriculture, technology agriculture and fine agriculture on agricultural production cannot be met. In the cultivation of crops in protected agriculture, the growth condition of crop plants needs to be accurately mastered, so that irrigation, fertilization, deinsectization and the like of the crops can be more efficiently and accurately guided. The traditional agricultural production relies on the experience of growers to judge and estimate the growth of crops, the accuracy of the obtained information is different and inaccurate, and the agricultural production mode can not meet the requirements of modern facility agriculture on the scientificity, accuracy, intelligence and high efficiency of agricultural production. And an important index of the diameter of the crop plant stalk for representing the growth condition of the crop is concerned by people.
At present, the diameter detection device for the plant stems in the facility agriculture greenhouse is mostly identified by a caliper type or contact type displacement sensor and computer vision. The former measures data by utilizing a displacement sensor in the process of thickening and slowing the growth of the stems, and a device for measuring the diameter of the stems based on the displacement sensor has a complex structure, can influence the growth of plants, and has high computer vision identification cost and low accuracy. And the diameter real-time data information obtained in the various modes cannot be remotely transmitted through a wireless network, and the real-time on-line monitoring of the stalk growth information cannot be realized.
Disclosure of Invention
Based on the existing problems, the invention provides an angle sensor-based plant stem diameter measurement wireless sensor network intelligent monitoring device, which expresses the diameter change process in the stem growing and thickening process in an angle opening mode, and can remotely transmit the acquired information through a wireless transmission network.
In order to achieve the purpose, the invention adopts the following technical scheme: a plant stem diameter wireless sensor network monitoring device which is characterized in that: comprises a sucker, a supporting arm, a spring ring and a high-precision angle sensor.
Furthermore, the fixed suckers are a pair of soft-rubber suckers, the suckers are fixed at the top end of the supporting arm through a shaft capable of rotating, and the pair of suckers can rotate on a vertical plane by 90 degrees.
Further, the supporting arm is divided into a left supporting arm and a right supporting arm, and is designed into an arc shape to provide a larger measuring space.
Furthermore, the bottom end of the right supporting arm is tightly screwed together with the thread fixing shaft of the angle sensor through the opening and is fixed, and the bottom end of the left supporting arm is tightly fixed with the rotation measuring shaft of the angle sensor through the opening, so that the movement of the left supporting arm can drive the rotation measuring shaft of the angle sensor to synchronously rotate together.
Further, the side design of two support arms has the semicylindrical protrudingly, cup joints on left and right support arm with a spring coil, and the waterproof flexible glue thin cover that elastic material made is wrapped up to the spring coil outward to fix in bellied top, can prevent that the spring coil from droing at the open in-process of support arm when the spring coil provides the resilience force for the support arm.
Further, the mechanical stroke of the angle sensor is 0-360 degrees, and no stop position exists.
Further, the diameter of the stalk is calculated according to the following formula according to the AD value corresponding to the collected angle change information:
y＝0.021x－0.764
wherein the x value is an AD value corresponding to the collected angle information, the y value is a diameter length value of the stem, the diameter measuring range is 0-15cm, and the error is +/-0.02-0.05 cm.
Further, plant stem diameter measurement sensor passes through the wire and connects on the collection node in greenhouse intelligent monitoring system, gathers plant stem diameter information through acquisition circuit, and wireless data transmission module on the collection node sends data to the gateway, sends to cloud platform and remote server through the 4G network.
Compared with the prior art, the invention has the following beneficial effects: the diameter of the stem is monitored in real time based on the angle sensor, the design structure of the device is utilized, the diameter variation is converted into the angle variation, the measurement information is converted into voltage signals which can be collected and processed, data are processed and converted through a mathematical formula, and the numerical value of the diameter of the stem is obtained.
Diameter data information acquired by the plant stem diameter measuring sensor can be transmitted to the gateway through the LORA data transmission module on the acquisition node, transmitted to the cloud platform through the 4G network, and finally displayed and stored at the remote server end, so that the real-time remote online monitoring of stem diameter growth information is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front cross-sectional view of the present invention;
FIG. 3 is a top cross-sectional view of the present invention;
FIG. 4 is a side sectional view of the present invention;
fig. 5 is a system configuration diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The plant stem diameter measuring sensor shown in figures 1 to 4 comprises a sucker (1), a supporting arm (2), a spring ring (4) and a high-precision angle sensor (5).
A pair of flexible glue sucking disc (1) is fixed at the plant stem stalk diameter both ends that await measuring, sucking disc (1) is made by the flexible glue, can avoid causing the damage to the stem stalk when cliping the stem stalk, sucking disc (1) can laminate more and adsorb on plant stem stalk surface, the top at support arm (2) is fixed through a radical axis (11) respectively in a pair of sucking disc (1), sucking disc (1) can rotate around axis (11), can adapt to the position change that the plant stem stalk can take place at the grow thickening in-process more like this, in order to improve measuring accuracy.
Two about support arm (2) divide into, and the shape design of support arm is the arc, can provide a bigger measurement space, can not make support arm and plant stem stalk take place to contact to influence measuring accuracy.
The bottom end of the right supporting arm (22) is tightly screwed with the thread fixing shaft (51) of the angle sensor through the opening and is fixed, and the bottom end of the left supporting arm (21) is tightly fixed with the rotation measuring shaft (52) of the angle sensor through the opening, so that the left supporting arm (21) can drive the rotation measuring shaft (52) of the angle sensor to rotate together. The left and right support arms (2) are combined by a fixed shaft (51) and a rotating shaft (52) of the angle sensor (5) to form a device which can be opened along with the rotation of the rotating measuring shaft (52) of the angle sensor.
The lateral surface design of controlling support arm (2) has the arch of semicylindrical (3), overlaps a spring coil (4) on a pair of support arm (2), and spring coil (4) outside parcel one deck is rich in elastic flexible glue thin cover, both can promote the resilience force that keeps the spring, can prevent again that the spring from getting damp and getting rusty. The spring ring (4) is fixed on the semi-cylindrical protrusion (3), so that the spring ring (4) cannot fall off due to the fact that the supporting arm is expanded by a certain angle. The spring ring provides the closed tension of resilience for a pair of support arm, just so for the sucking disc presss from both sides and provides the clamp force in the plant stem stalk diameter both sides that await measuring, can not the centre gripping too tightly moreover, avoids influencing the normal growth of plant stem stalk, and is difficult for droing, more accurate measured data.
When measuring plant stem diameter, lightly pull open a pair of support arm (2) with the hand, with sucking disc (1) centre gripping in the plant stem diameter both sides that await measuring, along with the growth of plant, the stem can slowly become thick, can slowly strut left branch arm (21) at the in-process that becomes thick, at the in-process that struts this moment, left branch arm (21) can drive angle sensor's rotation measurement axle (52) slowly rotates, just so can transmit the angle information that changes for node acquisition system's data acquisition circuit with the form of signal of telecommunication.
The data acquisition circuit acquires the AD value of the angle change information, a mathematical model is established through the measured data, and a corresponding conversion formula between the AD value of the angle change information and the diameter value of the plant stem is fitted:
y＝0.021x－0.764
wherein the x value is an AD value corresponding to the collected angle information, the y value is a diameter length value of the stem, the diameter measuring range is 0-15cm, and the error is +/-0.02-0.05 cm.
The conversion formula is written into a program of the node acquisition system, and the diameter value of the plant stem can be directly obtained under the calculation of a microprocessor circuit. Through the verification of the collected specific data, the diameter error obtained by calculation is very small, and the measurement requirement is met.
The selected angle sensor (5) has high resolution of 0.088 degrees and high accuracy, so that the change of a small angle of an opening force arm in the process of the weak and slow thickening of the diameter of the plant stem can be detected.
The acquisition node in the wireless network system realizes the response to the gateway command and the operations of acquiring, packing, sending and the like of the diameter data of the plant stalks. The microprocessor chooses STM32F103RBT6 that low-power consumption, high rate operation, peripheral hardware are abundant for the control core, has the AD of 2 12 bit 16 passageways, and plant stem diameter measuring transducer connects on the pin of AD passageway through wire (6), and microprocessor supplies power to plant stem diameter measuring transducer to gather sensor data, through gathering the wireless data transmission module on the node with data transmission to the gateway.
On one hand, the gateway in the wireless network system receives data acquired by the acquisition node through the wireless network, and then transmits the data to the cloud platform through the 4G network to complete data interaction between the acquisition node and the cloud platform; on the other hand, the gateway issues a command to the collection node. The gateway receives the diameter data of the plant stalks, transmits the diameter data to the cloud platform through the 4G network, and finally displays and stores the diameter data at the remote server end. The data transmitted to the cloud platform can be monitored and checked in real time on the upper computer, the data of the diameter value of the plant stem can be obtained in time, and the data play an important reference role in controlling the fertilization and irrigation of the plant crops.
Claims (6)
1. A plant stem diameter wireless sensor network monitoring device which is characterized in that: plant stem stalk diameter measurement sensor includes sucking disc (1), support ARM (2), spring coil (4) and high accuracy angle sensor (5), plant stem stalk diameter measurement sensor meets through AD passageway pin on wire (6) and the collection node circuit among the greenhouse intelligent monitoring system, changes the information of angle change into voltage signal, the microprocessor of collection node circuit chooses for use 32 ARM3 of position, and the plant stem stalk diameter information of gathering sends data transfer to the gateway through the LORA data transmission module on the collection node, sends the cloud platform through the 4G network, shows and the storage at remote server end at last.
2. The plant stem diameter wireless sensor network monitoring device of claim 1, characterized in that: the pair of suckers (1) are soft rubber suckers and are connected to the top ends of the supporting arms through a rotating shaft (11) and can rotate.
3. The plant stem diameter wireless sensor network monitoring device of claim 1, characterized in that: the pair of supporting arms (2) are designed into arc shapes, and the side surfaces of the arc-shaped supporting arms are designed with semi-cylindrical (3) shaped bulges.
4. The plant stem diameter wireless sensor network monitoring device of claim 1, characterized in that: the right supporting arm (22) is fixedly connected with the thread fixing shaft (51) of the angle sensor, the left supporting arm (21) is fixedly connected with the rotary measuring shaft (52) of the angle sensor, and the left supporting arm (21) can drive the rotary shaft (52) of the angle sensor to rotate together under the action of external force.
5. The plant stem diameter wireless sensor network monitoring device of claim 1, characterized in that: the spring ring (4) is wrapped by a waterproof soft rubber thin sleeve made of elastic material and is fixed above the semi-cylindrical bulges (3) on the side surfaces of the pair of supporting arms.
6. The plant stem diameter wireless sensor network monitoring device of claim 1, characterized in that: the angle sensor (5) has high accuracy and the resolution is 0.088 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910415998.4A CN111964627A (en) | 2019-05-19 | 2019-05-19 | Plant stem diameter wireless sensor network monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910415998.4A CN111964627A (en) | 2019-05-19 | 2019-05-19 | Plant stem diameter wireless sensor network monitoring device |
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| Publication Number | Publication Date |
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| CN111964627A true CN111964627A (en) | 2020-11-20 |
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| CN201910415998.4A Pending CN111964627A (en) | 2019-05-19 | 2019-05-19 | Plant stem diameter wireless sensor network monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684504A (en) * | 2022-12-29 | 2023-02-03 | 浙江大学 | Miniature stem flow sensor for plant fine stems |
| CN115777402A (en) * | 2022-11-30 | 2023-03-14 | 定南创富农业有限公司 | Navel orange seedling raising box that possesses automatic watering function |
-
2019
- 2019-05-19 CN CN201910415998.4A patent/CN111964627A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115777402A (en) * | 2022-11-30 | 2023-03-14 | 定南创富农业有限公司 | Navel orange seedling raising box that possesses automatic watering function |
| CN115684504A (en) * | 2022-12-29 | 2023-02-03 | 浙江大学 | Miniature stem flow sensor for plant fine stems |
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