CN209964795U

CN209964795U - Based on internet crops freeze-proof device

Info

Publication number: CN209964795U
Application number: CN201920839396.7U
Authority: CN
Inventors: 杨焜; 李骏慧; 吴寅
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-01-21
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses an internet-based crop anti-freezing device, which comprises a multi-point data acquisition module, a server and an anti-freezing processing module, wherein the multi-point data acquisition module comprises a plurality of temperature and humidity sensors and data acquisition cards which are distributed inside an anti-freezing heat preservation shed, the output ends of the temperature and humidity sensors are connected with the input ends of the data acquisition cards, the utility model processes the data acquisition process by adopting a data signal transmission conditioning module, the data signal transmission conditioning module comprises a signal amplification circuit, a feedback regulation circuit and a filter circuit which are connected in sequence, the server analyzes and compares the received data signals with the data in a system server database by utilizing the internet big data technology, and carries out anti-freezing measures on a planting area according to the comparison result, the data acquisition accuracy is high, the anti-interference effect is good, and the internal constant temperature of the heat preservation shed can, effectively improve the production environment of crops.

Description

Based on internet crops freeze-proof device

Technical Field

The utility model relates to a farming technical field that prevents frostbite especially relates to a based on internet crops freeze-proof device.

Background

The temperature change in winter changes greatly, and crops often receive the freeze injury because of the temperature snap, mainly reaches the winter protection frost-proof purpose through installing the thermal-insulated canopy that prevents frostbite on planting the district at present, but to some crops that need the constant temperature to survive, only adopt the thermal-insulated canopy that prevents frostbite to be totally not enough. With the development of computer technology and the popularization and application of internet technology, the crop anti-freezing device based on the internet brings important development opportunities for agricultural production. The existing crop anti-freezing device based on the internet mainly comprises a data acquisition module, a computer server and an anti-freezing processing module, and has the advantages of monitoring automation, informatization and the like, but in the data acquisition process, external electric power high voltage, electromagnetic interference and network fluctuation can interfere the acquisition of data signals, the accuracy of data acquisition is influenced, and the anti-freezing effect of the device is influenced.

So the utility model provides a new scheme to solve the problem.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, the utility model aims to provide a crop freeze-proof device based on internet.

The technical scheme for solving the problem is as follows: an internet-based crop anti-freezing device comprises a multipoint data acquisition module, a server and an anti-freezing processing module, wherein a data signal transmission conditioning module is arranged between the multipoint data acquisition module and the server, the data signal transmission conditioning module comprises a signal amplification circuit, a feedback regulation circuit and a filter circuit which are sequentially connected, the signal amplification circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with one end of a resistor R1 and a capacitor C1 and the output end of the multipoint data acquisition module, the other ends of the resistor R1 and the capacitor C1 are grounded, the inverting input end of the operational amplifier AR1 is connected with a pin 1 of an adjustable resistor RP1, the output end of the operational amplifier AR1 is connected with the grid of a MOS tube Q1, the drain of the MOS tube Q1 is connected with a +12V power supply, the source of the MOS tube Q1 is connected with a pin 3 of the adjustable resistor RP1, one end of the capacitor C2 and the cathode of a voltage stabilizing diode D, pin 2 of the adjustable resistor RP1 and the other end of the capacitor C2 are connected in parallel with the anode of the zener diode DZ1 to ground.

Further, the feedback regulation circuit comprises an operational amplifier AR2, an inverting input terminal of the operational amplifier AR2 is connected to a cathode of the zener diode DZ1 through a resistor R3, a non-inverting input terminal of the operational amplifier AR2 is connected to a non-inverting input terminal of the operational amplifier AR3 and a +12V power supply, an output terminal of the operational amplifier AR2 is connected to one ends of a resistor R5 and a capacitor C3, the other end of the resistor R5 is connected to one end of a capacitor C4 and an inverting input terminal of the operational amplifier AR3, an output terminal of the operational amplifier AR3 is connected to the other end of the capacitor C4 and one end of a resistor R4, and the other ends of the resistor R4 and the capacitor C3 are connected to an inverting input terminal of.

Furthermore, the filter circuit comprises an inductor L1, one end of the inductor L1 is connected with one end of a capacitor C5 and is connected with the output end of an operational amplifier AR2 through a resistor R6, the other end of the inductor L1 is connected with one end of a capacitor C6 and the data input end of the server, and the other ends of the capacitors C5 and C6 are connected with the ground in parallel.

Furthermore, the multipoint data acquisition module comprises a plurality of temperature and humidity sensors and a data acquisition card, and the output ends of the temperature and humidity sensors are connected with the input end of the data acquisition card.

Further, the data acquisition card is a PXI data acquisition card PXI-625 of NI corporation.

Through the technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses an adopt data signal transmission to take care of the module and carry out signal processing to data acquisition's process, the server utilizes the big data technology of internet to carry out analysis contrast with the data in the system server database with received data signal, and carry out the anti-freeze measure to planting the district according to the contrast result, and the data acquisition degree of accuracy is high, and anti-interference effect is good, can keep the constant temperature in the heat preservation canopy that prevents frostbite effectively, effectively improves crops production environment;

2. the output signal of the data acquisition card is firstly subjected to amplitude adjustment in the signal amplification circuit, so that the signal amplification imbalance is effectively avoided, and the output signal of the signal amplification circuit is processed by adopting the feedback adjustment circuit, so that the whole amplification process is in a closed-loop working state, thereby effectively eliminating the deviation of external interference of the system on data transmission and greatly improving the anti-interference performance of the system;

3. the filter circuit effectively eliminates high-frequency self-excited interference in the system by utilizing an LC filter principle, thereby effectively improving the accuracy of output signals and enabling the collected data received by the server to be more accurate and effective.

Drawings

Fig. 1 is a block diagram of the present invention.

Fig. 2 is a schematic circuit diagram of the data signal transmission conditioning module of the present invention.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The crop anti-freezing device based on the Internet comprises a multi-point data acquisition module, a server and an anti-freezing processing module, wherein the multi-point data acquisition module comprises a plurality of temperature and humidity sensors and data acquisition cards which are distributed in an anti-freezing heat preservation shed, and the output ends of the temperature and humidity sensors are connected with the input ends of the data acquisition cards. And each temperature and humidity sensor is used for detecting the temperature and the humidity of each point in the anti-freezing heat preservation shed and sending detection signals into the data acquisition card. When the data acquisition card is used specifically, a PXI data acquisition card of NI company is selected as the data acquisition card, each board card is provided with 32 analog input channels, and data acquired by the PXI data acquisition card is processed by a data signal transmission conditioning module and then sent to a server.

The data signal transmission conditioning module comprises a signal amplifying circuit, a feedback adjusting circuit and a filter circuit which are connected in sequence. The output signal of the data acquisition card is firstly subjected to amplitude adjustment in a signal amplification circuit, the signal amplification circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with a resistor R1, one end of a capacitor C1 and the output end of a multipoint data acquisition module, the other ends of the resistor R1 and the capacitor C1 are grounded, the inverting input end of the operational amplifier AR1 is connected with a pin 1 of an adjustable resistor RP1, the output end of the operational amplifier AR1 is connected with a grid electrode of a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with a +12V power supply, the source electrode of the MOS tube Q1 is connected with a pin 3 of an adjustable resistor RP1, one end of a capacitor C2 and the cathode of a voltage stabilizing diode DZ1 through a resistor R2, and the pin 2 of the adjustable resistor RP1 and the other end of the capacitor. The resistor R1 and the capacitor C1 form RC filtering to process the output signal of the data acquisition card, eliminate high-frequency clutter signals inside the system, then the output signal is sent to the operational amplifier AR1 for rapid operational amplification, the MOS tube Q1 utilizes the good stability of the MOS tube Q1 to improve the waveform of the output signal of the operational amplifier AR1, and ensure the stability of signal transmission, the output signal of the MOS tube Q1 is output in two parts, one part is sent to the feedback adjusting circuit for further processing after being stabilized by the voltage stabilizing diode DZ1, and the other part is fed back to the inverting input end of the operational amplifier AR1 through the adjustable resistor RP1, so that a negative feedback amplifying circuit is formed, and the imbalance of signal amplification is effectively avoided, wherein the resistance value of the adjustable resistor RP1 can be adjusted to change the feedback effect, thereby adapting to different data transmission network signal sizes, and enhancing the application range.

In order to eliminate the interference of external noise on data signal transmission, a feedback adjusting circuit is adopted to process the output signal of the signal amplifying circuit. The feedback regulation circuit comprises an operational amplifier AR2, the inverting input end of the operational amplifier AR2 is connected with the cathode of a voltage stabilizing diode DZ1 through a resistor R3, the non-inverting input end of the operational amplifier AR2 is connected with the non-inverting input end of the operational amplifier AR3 and a +12V power supply, the output end of the operational amplifier AR2 is connected with one end of a resistor R5 and a capacitor C3, the other end of the resistor R5 is connected with one end of a capacitor C4 and the inverting input end of the operational amplifier AR3, the output end of the operational amplifier AR3 is connected with the other end of a capacitor C4 and one end of a resistor R4, and the other ends of a resistor R4 and a capacitor C3 are connected with the. The capacitors C3 and C4 serve as feedback capacitors of the operational amplifiers AR2 and AR3 respectively to perform signal compensation and signal stabilization, and meanwhile the operational amplifier AR3 forms negative feedback on the output of the operational amplifier AR2 to enable the whole amplification process to be in a closed-loop working state, so that the deviation of external interference of the system on data transmission can be effectively eliminated, and the anti-interference performance of the system is greatly improved.

Since the pre-stage circuit generates self-excited interference during the feedback amplification process, the output signal of the operational amplifier AR2 is sent to the filter circuit for further processing. The filter circuit comprises an inductor L1, one end of an inductor L1 is connected with one end of a capacitor C5 and is connected with the output end of an operational amplifier AR2 through a resistor R6, the other end of an inductor L1 is connected with one end of a capacitor C6 and the data input end of the server, and the other ends of capacitors C5 and C6 are connected with the ground in parallel. The capacitors C5 and C6 and the inductor L1 form a pi-type LC filter circuit, and high-frequency self-excited interference in the system can be effectively eliminated by utilizing an LC filter principle, so that the accuracy of output signals is effectively improved.

The utility model discloses when specifically using, the distribution is in the temperature and the humidity of each point in the inside a plurality of temperature and humidity sensor real-time detection of frostproofing heat-preservation shed, and send into data acquisition card with the detected signal, data acquisition card's output signal carries out amplitude regulation at first in the signal amplification circuit, avoid signal amplification imbalance effectively, adopt feedback regulating circuit to handle signal amplification circuit's output signal, make whole amplification process be in closed loop operating condition, thereby can effectively eliminate the deviation that system external disturbance brought data transmission, the interference immunity of system has greatly been improved, last filter circuit utilizes LC filtering principle effectively to eliminate the inside high frequency self-excitation of system and disturbs, thereby improve output signal's accuracy effectively, make server received data collection more accurate effective. Then the server analyzes and compares the received data signals with data in a system server database by using an internet big data technology, and performs anti-freezing measures on the planting area according to the comparison result, for example, when the server judges that the detection value of a temperature and humidity sensor at a certain position point of the planting area is lower than a normal value, the server sends a control instruction to an anti-freezing processing module to perform anti-freezing measures on the position point, the specific measures can be spraying anti-freezing agent, nutrient solution and the like, the spraying amount is determined according to the difference value of the detection value and the normal value, and therefore the temperature of each point in the anti-freezing heat-preservation shed is guaranteed to reach the standard.

To sum up, the utility model discloses degree of automation is high, and the data acquisition degree of accuracy is high, and anti-interference effect is good, can keep the inside constant temperature of heat preservation canopy that prevents frostbite effectively, effectively improves crops production environment.

The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.

Claims

1. The utility model provides a crops freeze-proof device based on internet, includes multiple spot data acquisition module, server and prevents frostbite and handles the module, its characterized in that: a data signal transmission conditioning module is arranged between the multipoint data acquisition module and the server, the data signal transmission conditioning module comprises a signal amplification circuit, a feedback conditioning circuit and a filter circuit which are connected in sequence, the signal amplifying circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a resistor R1 and a capacitor C1 and the output end of a multipoint data acquisition module, the other ends of the resistor R1 and the capacitor C1 are grounded, the inverting input end of the operational amplifier AR1 is connected with a pin 1 of an adjustable resistor RP1, the output end of the operational amplifier AR1 is connected with the grid of a MOS transistor Q1, the drain of the MOS transistor Q1 is connected with a +12V power supply, the source of the MOS transistor Q1 is connected with a pin 3 of the adjustable resistor RP1 through the resistor R2, one end of the capacitor C2 and the cathode of a voltage stabilizing diode DZ1, pin 2 of the adjustable resistor RP1 and the other end of the capacitor C2 are connected in parallel with the anode of the zener diode DZ1 to ground.

2. The internet-based crop freeze protection device of claim 1, wherein: the feedback adjusting circuit comprises an operational amplifier AR2, the inverting input end of the operational amplifier AR2 is connected with the cathode of a voltage stabilizing diode DZ1 through a resistor R3, the non-inverting input end of the operational amplifier AR2 is connected with the non-inverting input end of the operational amplifier AR3 and a +12V power supply, the output end of the operational amplifier AR2 is connected with one ends of a resistor R5 and a capacitor C3, the other end of the resistor R5 is connected with one end of a capacitor C4 and the inverting input end of the operational amplifier AR3, the output end of the operational amplifier AR3 is connected with the other end of a capacitor C4 and one end of a resistor R4, and the other ends of a resistor R4 and a capacitor C3 are connected with the inverting.

3. The internet-based crop freeze protection device of claim 2, wherein: the filter circuit comprises an inductor L1, one end of an inductor L1 is connected with one end of a capacitor C5 and is connected with the output end of an operational amplifier AR2 through a resistor R6, the other end of an inductor L1 is connected with one end of a capacitor C6 and the data input end of a server, and the other ends of capacitors C5 and C6 are grounded in parallel.

4. The internet-based crop freeze protection device of claim 1, wherein: the multipoint data acquisition module comprises a plurality of temperature and humidity sensors and a data acquisition card, and the output ends of the temperature and humidity sensors are connected with the input end of the data acquisition card.

5. The internet-based crop freeze protection device of claim 4, wherein: the data acquisition card is a PXI data acquisition card PXI-625 of NI company.