CN103035112B - Wireless acquisition terminal for crop-atmosphere-soil information and acquisition method - Google Patents

Wireless acquisition terminal for crop-atmosphere-soil information and acquisition method Download PDF

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CN103035112B
CN103035112B CN201210554387.6A CN201210554387A CN103035112B CN 103035112 B CN103035112 B CN 103035112B CN 201210554387 A CN201210554387 A CN 201210554387A CN 103035112 B CN103035112 B CN 103035112B
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module
crop
sensor
circuit
real
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CN103035112A (en
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倪军
曹卫星
朱艳
姚霞
田永超
庞方荣
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南京农业大学
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Abstract

The invention discloses a wireless acquisition terminal for crop-atmosphere-soil information. The wireless acquisition terminal comprises a sensor module, a microprocessor module, a wireless communication module, a real-time clock module, a power control module and a power module, wherein the power module is used for supplying power to the real-time clock module and the power control module respectively; the power control module is connected with the sensor module, the microprocessor module and the wireless communication module respectively; and the microprocessor module is connected with the real-time clock module and the power control module in sequence. When the microprocessor module receives a signal acquired by the sensor module successfully, the power control module is controlled to be on and off by controlling a pulse signal of the real-time clock module to turn over so as to achieve long-time sleep and awakening of the wireless acquisition terminal and save the working energy consumption of the terminal. The invention further discloses an acquisition method, which achieves synergistic real-time acquisition of farm crop, environment and soil information in wide-range environments and is suitable for wide-range farm field working environments.

Description

A kind of crop-air-soil information wireless acquisition terminal and acquisition method

Technical field

The present invention relates to a kind of crop-air-soil information wireless acquisition terminal, particularly relate to agricultural land information wireless acquisition device, be applicable to agricultural land information for a long time, on a large scale, Real-Time Monitoring under unmanned condition, belong to agriculture Internet of Things field.

Background technology

In traditional crop production management process, accurate quantification understanding is often lacked to crop growth conditions; Or though quantitative test is carried out to plant growth index, but need destructive sampling and chemical analysis, poor in timeliness, often cause general excessive fertilization (particularly nitrogenous fertilizer) or Term Fertilization deficiency (as part trace element) in production, easily cause production cost rising, environmental pollution and the decline of limiting factors ability.For nitrogenous fertilizer, China's nitrogenous fertilizer consumption figure accounts for 30% of world's nitrogenous fertilizer total amount, but fertilizer utilization efficiency is very low, usually only have about 30%, and developed countries such as the U.S. generally reaches 50 ~ 60%.Therefore, world agriculture Environment Science must be aimed at, around the bottleneck of modern agricultural development, carry forward vigorously IT application to agriculture, intellectualized technology, the new and high technologies such as integrated advanced sensors technology and Internet of Things, realize the Real-Time Monitoring to crop, environment, soil in agricultural production management process, quick obtaining crop growth conditions, ecologic environment and liquid manure situation, for crop production whole process control provides abundant real time data resource and decision support, promote that Crop management is to digitizing and wisdom future development.

But in existing technology, the foundation of crop production intelligent management system is subject to the restriction of sensor technology, agricultural engineering, crop growth monitoring and Crop Planting Management Agriculture Expert decision-making technic, under environment, the collaborative Real-time Obtaining technology of field-crop, environment, soil information is also immature on a large scale, also there is monitoring index single, monitoring point scope is little, monitoring means is loaded down with trivial details, cost is high, constructional difficulties, easily the shortcomings and deficiencies such as to be disturbed, and can't meet practical application request well.

Summary of the invention

Technical matters to be solved by this invention is for the defect in background technology, one is provided to be applied to crop-air-soil information wireless acquisition terminal under farm environment on a large scale, this device energy multi-hop, collaborative, ad-hoc wireless sensing network, obtain farmland ecological environment information under realizing field field condition continuously, in real time, on a large scale.

The present invention is in order to solve the problem by the following technical solutions:

A kind of crop-air-soil information wireless acquisition terminal, comprises the sensor assembly, microprocessor module, the wireless communication module that are connected successively, and the power module for powering; Also comprise real-time clock module, energy supply control module; Wherein: described power module is powered to real-time clock module and energy supply control module respectively; Described energy supply control module is connecting sensor module, microprocessor module, wireless communication module respectively; Described microprocessor module is connected with the signal input part of real-time clock module, and the signal output part of described real-time clock module is connected with energy supply control module; After the signal of microprocessor module success receiving sensor module acquires, by controlling the pulse signal upset of real-time clock module, thus control the break-make of energy supply control module.

As the further prioritization scheme of a kind of crop-air-soil information wireless acquisition terminal of the present invention, described sensor assembly comprises sensitive element unit, signal condition unit and Bus Interface Unit; Wherein, described sensitive element unit comprises Temperature Humidity Sensor, CO 2concentration sensor, light intensity sensor, multispectral plant growth sensor, soil moisture sensor and soil temperature sensor; Described signal condition unit comprises plant growth signal conditioning circuit and soil moisture signal conditioning circuit;

Wherein: described multispectral plant growth sensor connects plant growth signal conditioning circuit by shielded cable, described soil moisture sensor connects soil moisture signal conditioning circuit by shielded cable, described soil information modulate circuit, plant growth signal conditioning circuit, Temperature Humidity Sensor, CO 2concentration sensor, light intensity sensor, soil temperature sensor be junctor highway interface unit respectively; Described Bus Interface Unit connects the digital mouth of microprocessor module.

As the further prioritization scheme of a kind of crop-air-soil information wireless acquisition terminal of the present invention, described plant growth signal conditioning circuit comprises current-voltage conversion circuit, micro-signal amplifying circuit, filtering circuit, adjustable gain circuit, analog to digital conversion circuit; Wherein: the input end of described current-voltage conversion circuit is connected with multispectral plant growth sensor, the output terminal of described current-voltage conversion circuit is connected in series micro-signal amplifying circuit, filtering circuit, adjustable gain circuit, analog to digital conversion circuit successively.

As the further prioritization scheme of a kind of crop-air-soil information wireless acquisition terminal of the present invention, described soil moisture signal conditioning circuit comprises f-V change-over circuit, voltage amplifier circuit, analog to digital conversion circuit; Wherein: the input end of described f-V change-over circuit connects soil moisture sensor, and the output terminal of described f-V change-over circuit connects voltage amplifier circuit, analog to digital conversion circuit successively.

As the further prioritization scheme of a kind of crop-air-soil information wireless acquisition terminal of the present invention, the frequency range of described wireless communication module is 780MHz.

As the further prioritization scheme of a kind of crop-air-soil information wireless acquisition terminal of the present invention, described energy supply control module comprises trigger, electronic analog swtich, fly-wheel diode, low pressure difference linear voltage regulator, decoupling diode; Wherein said trigger connects electronic analog swtich, fly-wheel diode, low pressure difference linear voltage regulator, decoupling diode successively.

As the further prioritization scheme of a kind of crop-air-soil information wireless acquisition terminal of the present invention, described power module comprises solar charging circuit, overvoltage crowbar, charge protector, mu balanced circuit; Wherein, described solar charging circuit connects overvoltage crowbar, charge protector, mu balanced circuit successively.

The present invention also proposes a kind of acquisition method based on above-mentioned crop-air-soil information wireless acquisition terminal, comprises the steps:

Step 1), arranges several crop-air-soil information wireless acquisition terminals as required in farmland, when starting each acquisition terminal power module, exports a positive narrow pulse signal to energy supply control module by real-time clock module; In energy supply control module, this positive narrow pulse signal is preserved through trigger, then drive electronic analog swtich, control low pressure difference linear voltage regulator enable, the microprocessor module making to be connected with energy supply control module, sensor assembly, wireless communication module switch on power respectively;

Step 2), microprocessor module carries out initialization: comprise the initialization of external digital mouth, sensor assembly gathers sequential initialization, communication protocol initialization, scanning channel initialization;

Step 3), each acquisition terminal adds self-organizing network by wireless communication module request, and waits for that networks converge node responds, if networks converge node sends connect response, then acquisition terminal is networked successfully; Otherwise continuation wait-for-response;

Step 4), sensor assembly is under the control of microprocessor module, and gather sequential according to sensor assembly and gather agricultural land information one by one, relational storage is in microprocessor module internal memory chronologically;

Step 5), after completing a collection period, assemble the data of relational storage in microprocessor module internal memory chronologically, the API of invocation protocol layer completes the transmission of data to networks converge node;

Step 6), after data successfully send, microprocessor module sends external interrupt request to real-time clock module, has no progeny, start the timing data be set in advance in real-time clock module in real-time clock module response; Simultaneously, real-time clock module exports a negative narrow pulse signal to energy supply control module, in energy supply control module, this negative narrow pulse signal is after flip/flops latch, turn off electronic analog swtich, control low pressure difference linear voltage regulator blocks, and makes microprocessor module be in powered down sleep state, wake-up waiting;

Step 7), when arriving the timing set in real-time clock module, a positive narrow pulse signal is exported to energy supply control module by real-time clock module, in energy supply control module, this positive narrow pulse signal is through flip/flops latch, then drive electronic analog swtich, control low pressure difference linear voltage regulator enable, the microprocessor module again making to be connected with energy supply control module, sensor assembly, wireless communication module switch on power respectively;

Step 8), repeated execution of steps 2)-step 7).

As the further prioritization scheme of acquisition method of crop-air-soil information wireless acquisition terminal of the present invention, sensor assembly described in step 4) gathers sequential and is: crop canopy temperature information, crop canopies humidity information, crop canopies Lighting information, crop canopies CO 2concentration information, plant growth information, soil moisture content information, soil moisture information.

The present invention adopts above technical scheme, and beneficial effect is compared with prior art:

1, a kind of crop-air-soil information wireless acquisition terminal of the present invention, integrated multiple sensors in circuit board level system, and gather Timing acquisition data according to certain sensor assembly, store data, fabrication data, transmission data, achieve the collaborative Real-time Obtaining of field-crop under environment on a large scale, environment, soil information.Overcome monitoring index in the past single, monitoring point is little, the drawback that monitoring method is loaded down with trivial details.

2, a kind of crop-air-soil information wireless acquisition terminal of the present invention, adopt ZigBee-780MHz multiband wireless communications, this frequency range is clean, diffracting power is strong, to water and humidity environment insensitive, transmission range is long, is disturbed little, and applicable farmland is monitored under environment on a large scale.

3, a kind of crop-air-soil information wireless acquisition terminal of the present invention, adopt real-time clock module timing, crop-air-long dormancy of soil information wireless acquisition terminal can be realized and wake up, save the operating power consumption of terminal, extend network life cycle, be applicable to field, farmland working environment on a large scale.

4, a kind of crop-air-soil information wireless acquisition terminal of the present invention, adopt solar powered, cost is low, for the farmland field environment that power supply facilities is deficienter, is a kind of best solution.

Accompanying drawing explanation

Fig. 1 is crop-air-soil information wireless acquisition terminal structural representation.

Fig. 2 is sensor module structure schematic diagram.

Fig. 3 is energy supply control module structural representation.

Fig. 4 is power module structure schematic diagram.

Embodiment

Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further details.

With reference to Fig. 1, a kind of crop-air-soil information wireless acquisition terminal comprises sensor assembly, micro treatment module, wireless communication module, real-time clock module, energy supply control module, power module.Sensor assembly, microprocessor module, wireless communication module are connected successively; Power module connects real-time clock module, energy supply control module respectively; Real-time clock module front end connects microprocessor module, and rear end connects energy supply control module; Energy supply control module connects microprocessor module, sensor assembly, wireless communication module respectively.

With reference to Fig. 2, the sensitive element of sensor assembly configuration comprises Temperature Humidity Sensor, CO 2concentration sensor, light intensity sensor, multispectral plant growth sensor, soil moisture sensor and soil temperature sensor; Wherein, Temperature Humidity Sensor, CO 2concentration sensor, light intensity sensor, soil temperature sensor output quantity are digital signal, direct junctor highway interface unit.Multispectral plant growth sensor gathers crop canopies reflectance spectrum information, successively through current-voltage conversion circuit, micro-signal amplifying circuit, filtering circuit, adjustable gain circuit, analog to digital conversion circuit process, be converted to digital signal, junctor highway interface unit.Soil moisture sensor gathers soil humidity information, through f-V change-over circuit, voltage amplifier circuit, analog to digital conversion circuit process, is converted to digital signal, junctor highway interface unit.Bus Interface Unit converges each perceptual signal, connects the digital I/O mouth of microprocessor module in a parallel fashion.

With reference to Fig. 3, energy supply control module comprises trigger, electronic analog swtich, fly-wheel diode, low pressure difference linear voltage regulator and decoupling diode; Wherein trigger connects electronic analog swtich, fly-wheel diode, low pressure difference linear voltage regulator and decoupling diode successively.

With reference to Fig. 4, power module comprises solar charging circuit, overvoltage crowbar, charge protector and system power supply circuit.Wherein, solar charging circuit connects overvoltage crowbar, charge protector and mu balanced circuit successively.Sun power adopts 9V/3W, utilizes lithium battery accumulation of energy, adopts mu balanced circuit to obtain the supply voltage grade DC3.3V of system stability.

Introduce wireless acquisition terminal of the present invention in order to detailed further, the acquisition method of a kind of crop-air-soil information wireless acquisition terminal of the present invention is described below, comprises the steps:

Step 1), start crop-air-soil information wireless acquisition terminal power module, real-time clock module exports a narrow positive pulse signal, preserve through trigger, drive simulant electronic switch, low pressure difference linear voltage regulator is enable, and microprocessor module switches on power, sensor assembly switches on power, and wireless communication module switches on power.

Step 2), microprocessor module carries out initialization, comprises the initialization of external digital mouth, sensor assembly gathers sequential initialization, communication protocol initialization, scanning channel initialization;

Step 3), crop-air-soil information wireless acquisition terminal request adds network, and waits for that networks converge node responds, if networks converge node sends connect response, then crop-air-soil information wireless acquisition terminal networks successfully; Otherwise continuation wait-for-response;

Step 4), sensor assembly is under the control of microprocessor module, and gather sequential according to sensor assembly and gather agricultural land information one by one, relational storage is in microprocessor module internal memory chronologically.Sensor assembly gathers sequential: crop canopy temperature information, crop canopies humidity information, crop canopies Lighting information, crop canopies CO 2concentration information, plant growth information, soil moisture content information, soil moisture information;

Step 5), after completing a collection period, assemble the data of relational storage in microprocessor module internal memory chronologically, the API of invocation protocol layer completes the transmission of data to networks converge node;

Step 6), after data successfully send, microprocessor module sends external interrupt request, has no progeny in real-time clock module response, start the timing data be set in advance in real-time clock module, meanwhile, real-time clock module exports a negative burst pulse, through flip/flops latch, turn off simulant electronic switch, low pressure difference linear voltage regulator blocks, and microprocessor module is in powered down sleep state, wake-up waiting.

Step 7), when timing then, real-time clock module exports a positive burst pulse, through flip/flops latch, drives simulant electronic switch, low pressure difference linear voltage regulator is enable, microprocessor module switches on power, and is waken up, and sensor assembly switches on power, wireless communication module switches on power, repeated execution of steps 2)-step 7).

The present invention adopts above scheme, can obtain the plant growth information such as field-crop nitrogen content, nitrogen accumulation, leaf area index, biomass continuously, in real time, on a large scale, crop canopy temperature, humidity, CO 2concentration, intensity of illumination, and the information such as agricultural land soil water percentage, soil moisture.

Above scheme is a simple examples of the present invention, and any equivalence made in technical scheme of the present invention is replaced and distortion, all should belong within scope disclosed in this invention.

Claims (8)

1. the acquisition method based on crop-air-soil information wireless acquisition terminal, described crop-air-soil information wireless acquisition terminal comprises the sensor assembly, microprocessor module, the wireless communication module that are connected successively, and the power module for powering; Also comprise real-time clock module, energy supply control module; Wherein: described power module is powered to real-time clock module and energy supply control module respectively; Described energy supply control module is connecting sensor module, microprocessor module, wireless communication module respectively; Described microprocessor module is connected with the signal input part of real-time clock module, and the signal output part of described real-time clock module is connected with energy supply control module; After the signal of microprocessor module success receiving sensor module acquires, by controlling the pulse signal upset of real-time clock module, thus control the break-make of energy supply control module; It is characterized in that, acquisition method comprises the steps:
Step 1), arranges several crop-air-soil information wireless acquisition terminals as required in farmland, when starting each acquisition terminal power module, exports a positive narrow pulse signal to energy supply control module by real-time clock module; In energy supply control module, this positive narrow pulse signal is preserved through trigger, then drive electronic analog swtich, control low pressure difference linear voltage regulator enable, the microprocessor module making to be connected with energy supply control module, sensor assembly, wireless communication module switch on power respectively;
Step 2), microprocessor module carries out initialization: comprise the initialization of external digital mouth, sensor assembly gathers sequential initialization, communication protocol initialization, scanning channel initialization;
Step 3), each acquisition terminal adds self-organizing network by wireless communication module request, and waits for that networks converge node responds, if networks converge node sends connect response, then acquisition terminal is networked successfully; Otherwise continuation wait-for-response;
Step 4), sensor assembly is under the control of microprocessor module, and gather sequential according to sensor assembly and gather agricultural land information one by one, relational storage is in microprocessor module internal memory chronologically;
Step 5), after completing a collection period, assemble the data of relational storage in microprocessor module internal memory chronologically, the API of invocation protocol layer completes the transmission of data to networks converge node;
Step 6), after data successfully send, microprocessor module sends external interrupt request to real-time clock module, has no progeny, start the timing data be set in advance in real-time clock module in real-time clock module response; Simultaneously, real-time clock module exports a negative narrow pulse signal to energy supply control module, in energy supply control module, this negative narrow pulse signal is after flip/flops latch, turn off electronic analog swtich, control low pressure difference linear voltage regulator blocks, and makes microprocessor module be in powered down sleep state, wake-up waiting;
Step 7), when arriving the timing set in real-time clock module, a positive narrow pulse signal is exported to energy supply control module by real-time clock module, in energy supply control module, this positive narrow pulse signal is through flip/flops latch, then drive electronic analog swtich, control low pressure difference linear voltage regulator enable, the microprocessor module again making to be connected with energy supply control module, sensor assembly, wireless communication module switch on power respectively;
Step 8), repeated execution of steps 2)-step 7).
2. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 1, it is characterized in that, sensor assembly described in step 4) gathers sequential and is: crop canopy temperature information, crop canopies humidity information, crop canopies Lighting information, crop canopies CO 2concentration information, plant growth information, soil moisture content information, soil moisture information.
3. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 1, is characterized in that, described sensor assembly comprises sensitive element unit, signal condition unit and Bus Interface Unit; Wherein, described sensitive element unit comprises Temperature Humidity Sensor, CO 2concentration sensor, light intensity sensor, multispectral plant growth sensor, soil moisture sensor and soil temperature sensor; Described signal condition unit comprises plant growth signal conditioning circuit and soil moisture signal conditioning circuit;
Wherein: described multispectral plant growth sensor connects plant growth signal conditioning circuit by shielded cable, described soil moisture sensor connects soil moisture signal conditioning circuit by shielded cable, described soil moisture signal conditioning circuit, plant growth signal conditioning circuit, Temperature Humidity Sensor, CO 2concentration sensor, light intensity sensor, soil temperature sensor be junctor highway interface unit respectively; Described Bus Interface Unit connects the digital mouth of microprocessor module.
4. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 3, it is characterized in that, described plant growth signal conditioning circuit comprises current-voltage conversion circuit, micro-signal amplifying circuit, filtering circuit, adjustable gain circuit, analog to digital conversion circuit; Wherein: the input end of described current-voltage conversion circuit is connected with multispectral plant growth sensor, the output terminal of described current-voltage conversion circuit is connected in series micro-signal amplifying circuit, filtering circuit, adjustable gain circuit, analog to digital conversion circuit successively.
5. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 3, described soil moisture signal conditioning circuit comprises f-V change-over circuit, voltage amplifier circuit, analog to digital conversion circuit; Wherein: the input end of described f-V change-over circuit connects soil moisture sensor, and the output terminal of described f-V change-over circuit connects voltage amplifier circuit, analog to digital conversion circuit successively.
6. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 1, is characterized in that, the frequency range of described wireless communication module is 780MHz.
7. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 1, it is characterized in that, described energy supply control module comprises trigger, electronic analog swtich, fly-wheel diode, low pressure difference linear voltage regulator, decoupling diode; Wherein said trigger connects electronic analog swtich, fly-wheel diode, low pressure difference linear voltage regulator, decoupling diode successively.
8. the acquisition method based on crop-air-soil information wireless acquisition terminal according to claim 1, it is characterized in that, described power module comprises solar charging circuit, overvoltage crowbar, charge protector, mu balanced circuit; Wherein, described solar charging circuit connects overvoltage crowbar, charge protector, mu balanced circuit successively.
CN201210554387.6A 2012-12-19 2012-12-19 Wireless acquisition terminal for crop-atmosphere-soil information and acquisition method CN103035112B (en)

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