CN103822662A - Temperature-humidity illumination intelligent sensor for agriculture and forestry - Google Patents
Temperature-humidity illumination intelligent sensor for agriculture and forestry Download PDFInfo
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Abstract
The invention provides a temperature-humidity illumination intelligent sensor for agriculture and forestry. The sensor is composed of a main control chip, multi-path illumination measurement modules, a temperature sensor, a humidity sensor, various types of communication modules, and an LCD display circuit. The main control chip includes a plurality of IIC interface, a plurality of AD conversion interfaces, a plurality of different types of communication serial ports, and a display circuit interface; the all paths of illumination measurement modules are respectively connected with the main control chip through the IIC interface and are used for collecting illumination and transmitting the illumination to the main control chip; and the temperature sensor and the humidity sensor are connected with the main control chip respectively through the AD conversion interfaces. According to the invention, the provided sensor has advantages of high precision, reliable performance, and easy data sharing. On the basis of good performances of high precision, self detection, self diagnosis, and stability and reliability, the provided intelligent sensor is multi-functional one that is suitable for the agriculture-forestry crop environment factor measurement.
Description
Technical field
The present invention relates to agriculture and forestry envirment factor monitoring field, relate in particular to agricultural humiture illumination intelligent sensor.
Background technology
Different plants is different to the demand of the meteorological conditions such as sunlight, temperature, air humidity.Research shows, the meteorological conditions such as sunlight, temperature, air humidity for nursery stock foster, the aspect tool such as plant growth, the prevention and control of plant diseases, pest control has a direct impact.But agriculture and forestry meteorological sensor exists due to performance drift, the low problem of the non-linear precision causing, and the data statistics cycle is long, data volume is few, cannot meet " precisely agriculture and forestry " scientific research demand to meteorological condition and the analysis of farm-forestry crop growth relationship.
The high sensor of existing corresponding precision is mainly weather station sensor special, but mostly is inlet sensor, and price is very expensive, and needs special collector, and common sensor accuracy aspect does not reach requirement, and it is fewer to be directed to agricultural environmental careers.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to the basic comprehension about some aspect of the present invention is provided.Should be appreciated that this general introduction is not about exhaustive general introduction of the present invention.It is not that intention is determined key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only that the form of simplifying provides some concept, using this as the preorder in greater detail of discussing after a while.
The invention provides a kind of agricultural humiture illumination intelligent sensor, comprising: main control chip, multichannel illumination photometry module, temp probe, moisture probe, the communication module of number of different types, LCD display circuit;
Described main control chip has multiple IIC interfaces, multiple AD translation interface, multiple dissimilar communication serial port, display circuit interface;
Described in each road, illumination photometry module is connected with described main control chip through described IIC interface respectively, for gathering illumination and being transferred to described main control chip;
Described temp probe is connected with described main control chip through described AD translation interface respectively with moisture probe, is respectively used to detected temperatures and humidity and is transferred to described main control chip;
Each described communication module is connected with described main control chip through the described communication serial port of respective type respectively, for realizing the communication interaction between communication module and main control chip;
Described LCD display circuit is connected with described main control chip through described display circuit interface, for displaying time, temperature, humidity and intensity of illumination.
For accurate agriculture and forestry to temperature, humidity, the specific (special) requirements of intensity of illumination, intelligent sensor provided by the invention, there is high precision, dependable performance, be easy to the advantage of data sharing, the temperature that the main control chip of this intelligent sensor collects from Temperature Humidity Sensor, the intensity of illumination data that humidity and multichannel illumination photometry module collect, and the processing such as multi-data fusion and compensation to illumination, realize high-acruracy survey, and support diversified communication modes to realize the transmission of data by multiple communication modules, there is the applicable farm-forestry crop envirment factor measurements such as high precision.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is agricultural humiture illumination intelligent sensor hardware architecture figure in the present invention;
Fig. 2 is agricultural four-wire system PT100 platinum resistance circuit diagram in humiture illumination intelligent sensor temp probe in the present invention;
Fig. 3 is agricultural humiture illumination intelligent sensor external structure schematic diagram in the present invention;
Fig. 4 is based on agricultural humiture illumination intelligent sensor detection method main program flow chart in the present invention;
Fig. 5 is sensor algorithm structure schematic diagram in one embodiment of the invention.
embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.The element of describing in an accompanying drawing of the present invention or a kind of embodiment and feature can combine with element and feature shown in one or more other accompanying drawing or embodiment.It should be noted that for purposes of clarity, in accompanying drawing and explanation, omitted expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and processing.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not paying creative work, belongs to the scope of protection of the invention.
Along with the development of sensor technology, the networking of multisensor and multidata fusion realize the megatrend that monitoring network is modern monitoring, conventionally sensor is that monofactor detects, if to existing several measurement factors of coupling phenomenon along with environmental change meeting forms error, thereby affect its degree of accuracy, as temperature, air humidity, temperature variation can have impact to the measurement of moisture measurement sensitive element, by the multiple measurement factor time, measure and carry out can effectively reducing error after Data Fusion and correction, improve sensor accuracy, and can reduce the accidental error of single-sensor by the data fusion of multisensor, improve sensor measurement precision.
The agricultural humiture illumination intelligent sensor hardware architecture figure providing in the present invention is provided, and humiture illumination intelligent sensor for described agricultural, comprising: main control chip, multichannel illumination photometry module, temp probe, moisture probe, the communication module of number of different types, LCD display circuit;
Described main control chip has multiple IIC interfaces, multiple AD translation interface, multiple dissimilar communication serial port, display circuit interface;
Described in each road, illumination photometry module is connected with described main control chip through described IIC interface respectively, for gathering illumination and being transferred to described main control chip;
Described temp probe is connected with described main control chip through described AD translation interface respectively with moisture probe, is respectively used to detected temperatures and humidity and is transferred to described main control chip;
Each described communication module is connected with described main control chip through the described communication serial port of respective type respectively, for realizing the communication interaction between communication module and main control chip;
Described LCD display circuit is connected with described main control chip through described display circuit interface, for displaying time, temperature, humidity and intensity of illumination.
Described main control chip is the STM32F103ZET6 of ARM Cortex-M3 framework, and built-in multiple 12 successive approximation type a/d sampling channels have been simulated 4 road IIC interfaces with common IO mouth, are respectively IIC0-IIC3.
Described in each road illumination photometry module respectively the IIC1-IIC3 in described IIC interface be connected with described main control chip, for gathering illumination and being transferred to described main control chip.
Intelligent sensor provided by the invention can the specific (special) requirements to temperature, humidity and intensity of illumination for agriculture and forestry, carry out the measurement of high precision, dependable performance, the main control chip of this intelligent sensor gathers the related data of intensity of illumination from temperature sensor, humidity sensor and multichannel illumination photometry module, and carry out diversified communication modes and realize the transmission of data by multiple communication interfaces, have advantages of that the applicable farm-forestry crop envirment factors such as high precision measure.
Optionally, described Intelligent Sensorsystem also comprises: memory circuit, and reset circuit and/or power circuit,
Described memory circuit is connected with described main control chip through described IIC0 interface, the data that detect for storing illumination photometry module, temp probe and moisture probe;
Described reset circuit is connected with described main control chip, for described agricultural are resetted with humiture illumination intelligent sensor;
Described power circuit is connected with described main control chip, for providing electric energy to described agricultural with humiture illumination Intelligent Sensorsystem.
The data of above-mentioned each illumination photometry module and the humiture probe corresponding intensity of illumination of detection and temperature, humidity and so on, after these data acquisitions well, described main control chip transfers data to memory circuit, be stored in described memory circuit, described memory circuit model for its model be EEPROM24C02.
Described power circuit has 5V, 3.3V and 12V after change-over circuit, and for described agricultural are powered with humiture illumination intelligent sensor disparate modules, main control chip power supply is 3.3V, and temp probe and moisture probe power supply are 12V, and illumination module is 5V.
Described main control chip comprises WatchDog Timer, and for described system is protected, in the time that system enters endless loop or abnormality, WatchDog Timer transmission of signal, to reset circuit, resets to described system, and assurance system is moved normally.
Optionally; described main control chip also comprises: WatchDog Timer and inner real-time clock, described WatchDog Timer is for monitoring and in the time that described agricultural humiture illumination intelligent sensor is abnormal, it protected the internal time of inner Real Time Clock Display.
Optionally, the STM32F103 model chip that described main control chip is ARM Cortex-M3 framework; And/or,
Described illumination photometry module is that model is: the illuminance transducer of BH1750;
Agricultural provided by the invention are the STM32F103 of ARM Cortex-M3 framework with the main control chip adopting in humiture illumination intelligent sensor, described chip has higher performance, the advantage such as low cost and low-power consumption, and described multiple AD sampling channels are 12 successive approximations, common IO mouth is set and simulates multiple IIC sequential, add the WatchDog Timer and the inner real-time clock that carry, reduce outside complicated circuit, in the aspect of hardware, reduce power consumption, improved the stability of system simultaneously.
By described main control chip STM32, common IO mouth is set, simulation 3 road IIC sequential, thus realize 3 tunnel illumination are gathered through 3 tunnel luminance detection modules.
Adopt three road illuminance transducers to carry out data acquisition, and carry out data fusion by described main control chip, adopt adaptive weight fusion estimated algorithm, the measured value providing according to each sensor, find in adaptive mode the optimal weighted factor that each sensor is corresponding, make the result after merging reach optimum.
Optionally, the acquisition range of described illuminance transducer is 0-65536lx, and relative accuracy is ± 4%.Illuminance transducer measurement range is wide, Linearity good, water resistance is good, easy to use, be convenient to installation, long transmission distance, is applicable to various places, is particularly useful for the place such as agricultural greenhouse, city illumination, and the selection of above-mentioned acquisition range is more suitable for agriculture and forestry.
Optionally, described moisture probe is three-wire system output capacitance formula humidity sensor.Described capacitance type humidity sensor is a kind of peanut capacitor that makes medium of organic high molecular layer.Sensor is placed in atmosphere, enters dielectric layer when steam in atmosphere sees through top electrode, and dielectric layer absorbs after steam, and medium coefficient changes, and causes condenser capacity to change, and the variation of electric capacity is proportional to relative humidity.The acquisition range of described humidity sensor is: the limits of error ± 3%RH(0～90) %RH, ± 5%RH(90～100) %RH.(0～1) V DC voltage of the humidity of described sensor stable output within the scope of (0～100) %RH, and present linear relationship, gather into main control chip by AD after signal conditioning circuit, in chip, after linearization process and conversion, obtain humidity value.
Optionally, the resistance in described temp probe is four-wire system PT100 platinum resistance.As shown in Figure 3, in order to eliminate the impact of lead resistance from hardware, use the compensation of two-way exciting current due to the error that lead resistance causes, reference voltage is set and makes analog voltage input range be ratio variation according to reference voltage, eliminate exciting current and change Accuracy.
Optionally, the acquisition range of described temp probe is :-40～60 ℃, temperature accuracy maximum tolerance is ± 0.2 ℃.
Optionally, multiple dissimilar communication serial port comprises: two UART communication interfaces and a CAN controller;
Number of different types communication module comprises: RS232 communication module, RS485 communication module and CAN communication module;
Described RS232 communication module is connected with described main control chip through a UART communication interface, and described RS485 communication module is connected with described main control chip through another UART communication interface, and described CAN communication module is connected with described main control chip through described CAN communication interface.
Described agricultural have adopted multiple communication modules with humiture illumination intelligent sensor, are connected with described main control chip by multiple communication modules, have realized diversified communication modes.
Optionally, described in multichannel, illumination photometry module is specially illumination photometry module described in 3 tunnels, by 3 described road illumination photometry modules are connected by IIC1, IIC2, the IIC3 interface of main control chip, realize the transmission of data, and the illumination photometry module by 3 tunnels is measured corresponding illumination, and described main control chip is processed the data that measure, obtain more accurately and more reliable information.
BH1750fiv sensor in described illumination photometry module can float along with temperature appears in the variation of temperature, and according to BH1750fiv official databook, its measured value and actual value ratio k and temperature t (unit ℃) variation present linear relationship,
After linearization process, obtain the corrected value of temperature compensation.Collect 3 brightness values are carried out after temperature drift processing, and the data fusion of carrying out many illuminance transducers obtains the brightness value that precision is higher.
The data fusion of many illuminance transducers has adopted adaptive weight fusion estimated algorithm, its ultimate principle is under the optimal conditions of overall mean square error minimum, the measured value providing according to each sensor, find in adaptive mode the optimal weighted factor that each sensor is corresponding, make the result after merging reach optimum, its specific algorithm is as follows:
The temperature compensated rear X that is made as respectively of illumination that She San road illuminance transducer BH1750fiv collects
1, X
2, X
3, its weighting factor is respectively w
1, w
2, w
3, the variance of establishing each sensor is respectively σ
1, σ
2, σ
3its algorithm structure figure as shown in Figure 5.
Its merge after
value should meet:
X
1x
2x
3independently of one another, X is without partially estimating, therefore its total mean square deviation is:
Want to make formula (2) minimum in (1) situation, can obtain:
Can obtain optimal value according to actual measured value is again:
The data that above-mentioned fusion treatment can measure described multichannel illumination photometry module are carried out, and can obtain optimal value according to actual measured value, and the data that obtain are more accurate.
As shown in Figure 3, the present invention also provides agricultural humiture illumination intelligent sensor external structure schematic diagram, LCD display 1 is arranged on central authorities, be convenient to show and reading, 4-7 is button, is used for selecting various parameters, and button 8 is reset key, be connected with described reset circuit, in the time that described sensor breaks down, carry out hand-reset.
Humiture illumination intelligent sensor for agricultural provided by the invention, there is high precision, dependable performance, be easy to data sharing, the temperature that the main control chip of this system collects from Temperature Humidity Sensor, the intensity of illumination data that humidity He San road illumination photometry module collects, and multi-data fusion and compensation to illumination, realize high-acruracy survey, and there is data storage, and RS232, RS485 and CAN variation communication modes is realized the transmission of data, high precision, detection certainly, self diagnosis and reliable and stable in, realized system networking management.
The detection method that the invention still further relates to described intelligent sensor, comprising:
Main control chip receives acquisition by least one communication module, according to described acquisition control multichannel illumination photometry module, temp probe and moisture probe carries out data acquisition and by the data transmission collecting in described main control chip, described main control chip is processed the data that collect; Described main control chip is by the data transmission of handling well to LCD display, and to show corresponding time, temperature, humidity and intensity of illumination by described LCD display, the multiple communication modules that are connected with described main control chip are carried out the mutual of information.
As shown in Figure 4, in the time that described main control chip receives acquisition, the each sensor being connected with described main control chip carries out signals collecting work, the data that described multichannel illumination photometry module, temp probe and moisture probe collect are processed in being transferred to described main control chip by interface, the various information getting is transmitted, be transferred in main frame, carry out the filtration of data, delete the data of gross error; And described multichannel illumination photometry module gets multichannel data, described multichannel data is focused on, reject gross error etc., therefore obtain the data that precision is higher, transfer data in main frame, the data that again processing obtained are converted to the data of display screen identification, and are convenient to described LCD display and described data message can be shown; Can also carry out fault diagnosis in conjunction with other modules based on these data messages, make described sensor can be under normal pattern continuous firing.The data of handling well show by LCD display, and by memory circuit, described data are preserved.
And described multichannel illumination photometry module Wei San road illumination photometry module, can more collect data analysis, obtain more accurately data message reliably.
Described main control chip is connected with multiple communication modules, can carry out with multiple communication modules the exchange of information, first RS232 circuit use extensively and long transmission distance, the bit error rate low, and CAN PORT COM is real-time, reliability is high, interoperability is good, realize the variation of communication modes, realized group and dug network management.
Optionally, before described main control chip receives acquisition, described agricultural are carried out to initialization with humiture illumination intelligent sensor.WatchDog Timer, the communication serial ports etc. of described initialization to main control chip in system carries out initialization, so that the order of Receiving Host.
Optionally, also comprise: when described agricultural humiture illumination intelligent sensor does not receive acquisition in reservation duration, enter standby mode.
Intelligent sensor is as acquisition process terminal, the order of responding system, acquisition process Data Concurrent send, when without order in holding state.Effectively reduce system power dissipation, there are reduction system master clock frequency and the time of prolongation system under standby mode, first to system initialization, and Receiving Host order, if without order, enter into standby mode, in system, be also provided with independent WatchDog Timer and real-time clock, be convenient to system stable operation.
Control method provided by the invention can accurately collect data reliably, and data are processed, and has realized high-precision measurement, and can be by diversified communication modes transmission data.
In the various embodiments described above of the present invention, the sequence number of embodiment and/or sequencing are only convenient to describe, and do not represent the quality of embodiment.Description to each embodiment all emphasizes particularly on different fields, and there is no the part of detailed description in certain embodiment, can be referring to the associated description of other embodiment.
In the embodiment such as apparatus and method of the present invention, obviously, each parts or each step reconfigure after can decomposing, combine and/or decomposing.These decomposition and/or reconfigure and should be considered as equivalents of the present invention.Simultaneously, in the above in the description of the specific embodiment of the invention, describe and/or the feature that illustrates can be used in same or similar mode in one or more other embodiment for a kind of embodiment, combined with the feature in other embodiment, or substitute the feature in other embodiment.
Finally it should be noted that: although described above the present invention and advantage thereof in detail, be to be understood that in the case of not exceeding the spirit and scope of the present invention that limited by appended claim and can carry out various changes, alternative and conversion.And scope of the present invention is not limited only to the specific embodiment of the described process of instructions, equipment, means, method and step.One of ordinary skilled in the art will readily appreciate that from disclosure of the present invention, can use carry out with the essentially identical function of corresponding embodiment described herein or obtain process, equipment, means, method or step result essentially identical with it, that existing and will be developed future according to the present invention.Therefore, appended claim is intended to comprise such process, equipment, means, method or step in their scope.
Claims (9)
1. a humiture illumination intelligent sensor for agricultural, is characterized in that, comprising: main control chip, multichannel illumination photometry module, temp probe, moisture probe, the communication module of number of different types, LCD display circuit;
Described main control chip has multiple IIC interfaces, multiple AD translation interface, multiple dissimilar communication serial port, display circuit interface;
Described in each road, illumination photometry module is connected with described main control chip through described IIC interface respectively, for gathering illumination and being transferred to described main control chip;
Described temp probe is connected with described main control chip through described AD translation interface respectively with moisture probe, is respectively used to detected temperatures and humidity and is transferred to described main control chip;
Each described communication module is connected with described main control chip through the described communication serial port of respective type respectively, for realizing the communication interaction between communication module and main control chip;
Described LCD display circuit is connected with described main control chip through described display circuit interface, for displaying time, temperature, humidity and intensity of illumination.
2. humiture illumination intelligent sensor for agricultural according to claim 1, is characterized in that, also comprises: memory circuit, and reset circuit and/or power circuit,
Described memory circuit is connected with described main control chip through described IIC interface, the data that detect for storing illumination photometry module, temp probe and moisture probe;
Described reset circuit is connected with described main control chip, for described agricultural are resetted with humiture illumination intelligent sensor;
Described power circuit is connected with described main control chip, for providing electric energy to described agricultural with humiture illumination intelligent sensor.
3. humiture illumination intelligent sensor for agricultural according to claim 1; it is characterized in that; described main control chip also comprises: WatchDog Timer and inner real-time clock, described WatchDog Timer is for monitoring and in the time that described agricultural humiture illumination intelligent sensor is abnormal, it protected the internal time of inner Real Time Clock Display.
4. humiture illumination intelligent sensor for agricultural according to claim 1, is characterized in that,
Described main control chip is the STM32F103 model chip of ARM Cortex-M3 framework; And/or,
Described illumination photometry module is that model is: the illuminance transducer of BH1750; And/or,
Described moisture probe is three-wire system output capacitance formula humidity sensor; And/or,
Resistance in described temp probe is four-wire system PT100 platinum resistance.
5. humiture illumination intelligent sensor for the agricultural of stating according to claim 1, is characterized in that, the acquisition range of described illumination photometry module is: 0-65536lx, relative accuracy is ± 4%.
6. humiture illumination intelligent sensor for the agricultural of stating according to claim 1, is characterized in that, the acquisition range of described temp probe is :-40～60 ℃, temperature accuracy maximum tolerance is ± 0.2 ℃.
7. humiture illumination intelligent sensor for the agricultural of stating according to claim 1, is characterized in that, the acquisition range of described moisture probe is: the limits of error ± 3%RH(0～90) %RH, ± 5%RH(90～100) %RH.
8. humiture illumination intelligent sensor for agricultural according to claim 1, is characterized in that, multiple dissimilar communication serial ports comprise: two UART communication interfaces and a CAN controller;
Number of different types communication module comprises: RS232 communication module, RS485 communication module and CAN communication module;
Described RS232 communication module is connected with described main control chip through a UART communication interface, and described RS485 communication module is connected with described main control chip through another UART communication interface, and described CAN communication module is connected with described main control chip through described CAN controller.
9. humiture illumination intelligent sensor for agricultural according to claim 1, is characterized in that, illumination photometry module is specially illumination photometry module described in 3 tunnels described in multichannel.
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Application publication date: 20140528 |