CN207423797U - Soil and fertilizer nutrient detection device - Google Patents

Abstract

The utility model discloses a kind of soil and fertilizer nutrient detection devices, it is intended to solve the technical issues of existing detector detection range is narrow, precision is low, inconvenient to carry.The utility model includes housing, detection box, mini-printer, liquid crystal display and input terminal are provided on housing, detecting box includes light source, filter unit, cell, photoelectric sensor and microprocessor, the light that light source is sent is converted to electric signal by photoelectric sensor reception through cell after filter unit filters and is sent into the microprocessor, and microprocessor and mini-printer, liquid crystal display, input terminal are corresponding connected exporting testing result.The advantageous effects of the utility model are：Accuracy of detection is high, scope is wide, low in energy consumption；Testing result is convenient for arrangement；It is and small easy to carry.

Description

Soil and fertilizer nutrient detection device

Technical field

The utility model is related to agriculture test equipment technical fields, and in particular to a kind of soil and fertilizer nutrient detection device.

Background technology

In agricultural production process, good soil quality decides that plant growth is vigorous.It is but excessive or insufficient Nutrient can all cause plant growth bad.We blindly apply fertilizer at country in planting industry generally existing at present, before fertilising not Understand soil need on earth how much fertilizer as supplement, so caused by direct result be exactly that crops cannot give birth to greatest extent Long good, fertilising is excessive to cause a series of problems, such as environmental pollution, fund waste etc., therefore is needed before fertilising in soil Nutritional ingredient be detected to determine to apply the species and applied amount of fertilizer.Traditional detection is mostly according to anti-by chemical method Required reagent is answered to determine the content of a certain ingredient in soil, but this method can receive environmental condition and subjective consciousness Influence, error is higher, and if the chemical reagent used in detection process deal with improperly and can also cause environmental pollution.

With China's scientific and technological progress and the development of automation, occur so-called detector in the market, it is molten by soil The extinction amount of liquid determines the amount of special component contained therein, but this detector mostly uses in laboratory, complicated, energy consumption Height, it is inconvenient to carry, and be detected just for a certain ingredient, use scope is narrow, and the test data detected needs Statistical analysis is manually carried out, precision is low, and calculation amount is larger, and not easy to maintain and arrangement.

The content of the invention

The technical problems to be solved in the utility model be existing soil nutrient detector it is complicated, it is inconvenient to carry, inspection Survey that narrow range precision is low, data processing complex and testing result be not easy to maintain and arrange.

In order to solve the above technical problems, the utility model adopts the following technical solution：

Design a kind of soil and fertilizer nutrient detection device, including housing, be provided on housing detection box, input terminal and Outlet terminal；Detecting box includes light source, filter unit, cell, photoelectric sensor and signal processing circuit, the light that light source is sent Electric signal is received and converted to by photoelectric sensor through cell after filter unit filters and is sent into signal processing circuit later, Signal processing circuit and input terminal, outlet terminal is corresponding is connected to export testing result；Signal processing circuit includes containing Processor of single chip computer, LCD driver, switching mode triode Q1, processor of single chip computer input port and the light of analog-digital conversion function Electric transducer, which corresponds to, to be connected, and output terminal is corresponding with LCD driver to be connected, switching mode triode Q1 emitters and processor of single chip computer Output terminal is connected, and collector is connected with LCD driver backlight port.

Preferably, microprocessor includes one kind in STM32F103X series monolithics, and integrated level is high so that circuit structure Simply, it is and low in energy consumption.

Preferably, mini-printer uses thermal printer, and print speed is fast, low noise, printing are clear, easy to use, Liquid crystal display is 126*64LCD liquid crystal displays, low in energy consumption, clarity is high, control is simple.

Preferably, button is silica gel push-button, is quick on the draw and comfortable feel is hardly damaged.

Preferably, light source includes sending out diode, and low in energy consumption and light quality is good.

Preferably, filter unit includes driver plate, is provided with shaft, shifting block and more than one optical filter, passes through rotation Transfer block is the heterogeneity in the optical tests solution for can obtain different colours, extends detection range.

Preferably, photoelectric sensor includes silicon photocell, is quick on the draw, service life is long.

It is further preferred that housing is additionally provided with the PH sensor interface being connected with the microprocessor and RS232 communications Interface communicates for the pH value for measuring the soil liquid and with host computer.

Compared with prior art, the advantageous effects of the utility model are：

1. the utility model detection range is wide, the measure of the absorbance of different colours can be gone out by the soil liquid Multiple components in the soil liquid combine the measurement of a variety of nutrients together, powerful.

3. the utility model precision is high, stability is strong, coordinates photoelectric sensor by microprocessor, makes detection linearity error Less than 0.003, repeatability error is less than 0.005, and stability is drifted about in three seconds is less than 0.003.

2. the utility model is easy to operate, the light that shifting block i.e. switching light filter generates different colours is stirred, it is not necessary to cumbersome Replacement optical filter, and solve cumbersome calculating process using powerful processor of single chip computer, it is easy to use.

3. the utility model is small, integrated design is easy to carry, and it is a variety of can be applied to indoor and outdoor Occasion has expanded use scope.

4. the utility model circuit structure is simple, low in energy consumption, using the processor of single chip computer for being integrated with AD conversion function, essence Simple circuit structure simultaneously reduces power consumption, is more advantageous to carrying out field condition test use.

Description of the drawings

Fig. 1 is the utility model top view；

Fig. 2 is the utility model filter sheet structure schematic diagram；

Fig. 3 is the utility model functional block diagram；

Fig. 4 is the utility model electrical block diagram.

In figure, 1 is visor, and 2 be optical filter, and 3 be cell, and 4 be mini-printer, and 5 be liquid crystal display, 6 be by Key, 7 be housing upper surface, and 8 be shifting block, and 9 be optical filter, and 10 be shaft.

Specific embodiment

Illustrate specific embodiment of the present utility model with reference to the accompanying drawings and examples, but following embodiment simply uses It is described in detail the utility model, does not limit the scope of the utility model in any way.

Program that is involved or relying on is the conventional program or simple program of the art in following embodiment, ability Field technique personnel can make conventional selection or accommodation according to concrete application scene.

The devices such as involved unit module, parts, structure or sensor in following embodiment, unless otherwise instructed, It is then conventional commercial product.

Embodiment 1：Referring to Fig. 1, including housing, optical filter is provided on housing for a kind of soil and fertilizer nutrient detection device 2nd, cell 3, mini-printer 4, liquid crystal display 5, button 6, enclosure interior be additionally provided with light emitting diode, silicon photocell and STM32F103X series monolithic controllers；Light emitting diode is located at the rear of optical filter 2, the course of work such as Fig. 3, light-emitting diodes The light that pipe is sent absorbs generation attenuation by the solution to be measured in cell after passing through optical filter and incides on silicon photocell, silicon light The attenuation of optical signal is converted to the variation of electric signal by battery, and singlechip controller is molten to determine by detecting change in electric amount The concentration of nutrient in liquid；Foundation lambert --- Beer law, i.e.,：A=K×C×L（A in formula：Absorbance, K：Absorption coefficient, C： Solution concentration, L：Sample path length）It draws C=A/KL, solution concentration can obtain by the measurement of absorbance A；Singlechip controller It is also associated with silica gel push-button, mini-printer 4, liquid crystal display 5 and RS232 communication interfaces and pH sensor interfaces, monolithic The command signal for the testing result cooperation silica gel push-button input that machine controller processing is drawn may be selected to check or lead on a display screen Printer printing is crossed, host computer can also be output to by RS232 communication interfaces and carries out storage and further utilizes；Measuring pH During value, pH sensors access sensor interface directly can be read into pH value, it is convenient and efficient.

Fig. 2 is the structure diagram of optical filtering driver plate, and shifting block 8 protrudes the opening in housing upper surface 7, and optical filter 9 is uniform Be distributed on driver plate, driver plate is provided centrally with shaft 10；Setting 8 ahead by fluctuation makes driver plate 10 rotations around the shaft come toggle lights The color of front optical filter, selecting the color of soil liquid trap maximum can make testing result more accurate.

Fig. 4 be the present embodiment electrical block diagram, modulus conversion functional module built in STM32F103X series monolithics, Silicon photocell and analog-to-digital conversion input interface PA1/ADC12_IN are correspondingly connected with, analog-to-digital conversion can be realized and carry out further Computing；NREST is reseting interface, and pushing button makes port ground connection realize reset function；OSC_IN and OSC_OUT connect for clock Mouth provides clock signal；I/O port phase of the control port that LCD12864 pin numberings are 1 ~ 5 directly with STM32F103X microcontrollers Even, pin, the 8th pin are the backlight electric power ports of LCD to 6,7 feet for power supply, pass through I/O mouthfuls of three poles of control for microcontroller The break-make for turning on to control backlight electric power of pipe, so as to save the purpose of power consumption.

The utility model is described in detail above in conjunction with drawings and examples, still, the skill of technical field Art personnel, can also be to each specific in above-described embodiment it is understood that on the premise of the utility model aims are not departed from Parameter changes, and forms multiple specific embodiments, is the common excursion of the utility model, no longer detailed one by one herein It states.

Claims (8)

1. a kind of soil and fertilizer nutrient detection device, including housing, it is characterised in that：The housing is provided with detection box, input Terminal and outlet terminal；The detection box includes light source, filter unit, cell, photoelectric sensor and signal processing circuit, The light that the light source is sent is received and converted by the photoelectric sensor through the cell after filter unit filtering To be sent into the signal processing circuit after electric signal, the signal processing circuit is corresponding with the input terminal, outlet terminal It is connected to export testing result；

The signal processing circuit includes the processor of single chip computer containing analog-digital conversion function, LCD driver, switching mode triode Q1, photoelectric sensor described in the processor of single chip computer input port, which corresponds to, to be connected, output terminal phase corresponding with the LCD driver Even, the switching mode transistor emitter is connected with the processor of single chip computer output terminal, and collector is carried on the back with the LCD driver Optical port is connected.

2. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The outlet terminal includes temperature-sensitive Mini-printer and 12864LCD liquid crystal displays.

3. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The input terminal includes silica gel Button.

4. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The light source includes sending out two poles Pipe.

5. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The filter unit includes containing The driver plate of shaft, shifting block and more than one optical filter.

6. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The processor of single chip computer processing Device includes one kind in STM32F103 series monolithics.

7. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The photoelectric sensor includes silicon Photocell.

8. soil and fertilizer nutrient detection device according to claim 1, it is characterised in that：The housing is additionally provided with and institute State PH sensor interface and the RS232 communication interfaces that processor of single chip computer is connected.