CN204462134U

CN204462134U - Portable multi-function soil parameters sensing device

Info

Publication number: CN204462134U
Application number: CN201420735894.4U
Authority: CN
Inventors: 宋庆恒; 钱莹晶; 李政峰; 刘英德; 曾凡丁; 谭懿
Original assignee: Huaihua University
Current assignee: Huaihua University
Priority date: 2014-11-30
Filing date: 2014-11-30
Publication date: 2015-07-08
Anticipated expiration: 2024-11-30

Abstract

The utility model discloses a kind of portable multi-function soil parameters sensing device.In order to overcome existing soil testing instrument function singleness, data can not store transmission, automatically deficiencies such as measuring orientation can not be recorded, the utility model soil pH value sensor is connected with CC2530 by pH value amplifier, described soil conductivity sensor is connected with CC2530 by conductivity amplifier, described CC2530 is connected with soil temperature sensor, memory module, power module, GPS module, LCD MODULE respectively, and described soil conductivity sensor is connected with signal generator.The utility model is used for Soil K+adsorption, it once can complete soil pH value, conductivity, temperature, testing location longitude and latitude, the isoparametric collection of height above sea level, detection and storage, user forwards stored data to computing machine by serial ports and carries out treatment and analysis, cost is low, easy and simple to handle, measuring speed is fast, GPS positioning precision is high, and field survey error is less than 2%.

Description

Portable multi-function soil parameters sensing device

Technical field

The utility model relates to a kind of soil testing assemblies, is specially a kind of portable multi-function soil parameters sensing device.

Background technology

Soil conductivity contains the abundant information of reflect soil quality and physical characteristics, and soil conductivity determined by soil properties such as factor of porosity, temperature, salinity, cation exchange capacity (CEC)s.Soil pH value is the intensity index of soil acidity or alkalinity, be the fundamental property of soil and fertility important factor in order it-, it directly affects the existence of soil nutrient, conversion and validity, thus affects growing of plant.Therefore the real-time detection of soil pH value, conductivity is all significant to the field such as Digital Agriculture, warmhouse booth, flowers or vegetables, grass farm, soil speed survey, plant cultivation, scientific experimentation.

The deficiency of existing soil testing instrument, one is to measure a kind of soil parameters, and the mass data measured cannot store, and more data conversion storage can not be carried out further treatment and analysis to computing machine; Two is to utilize test data draw spatio-temporal distribution figure and utilize distribution plan comprehensively to analyze when carrying out field survey.

Utility model content

The purpose of this utility model is exactly for above-mentioned deficiency, a kind of portable multi-function soil parameters sensing device is provided, it once can complete soil pH value, conductivity, temperature, testing location longitude and latitude, the isoparametric collection of height above sea level, detection and storage, and utilize the soil moisture to correct pH value, conductivity, user forwards stored data to computing machine by serial ports and carries out treatment and analysis, cost is low, easy and simple to handle, measuring speed fast, and GPS positioning precision is high, and measurement error is little.

For achieving the above object, the technical solution of the utility model is, this portable multi-function soil parameters sensing device, comprise soil pH value sensor, soil temperature sensor, soil conductivity sensor, described soil pH value sensor is connected with CC2530 by pH value amplifier, described soil conductivity sensor is connected with CC2530 by conductivity amplifier, described CC2530 is connected with soil temperature sensor, memory module, power module, GPS module, LCD MODULE respectively, and described soil conductivity sensor is connected with signal generator.

The utility model soil pH value sensor, convert P in soil H value to electric signal, soil temperature sensor converts the soil moisture to electric signal; Soil conductivity sensor, converts soil conductivity to electric signal; CC2530 is microprocessor module, controls the functional realiey of GPS module, reads its data such as longitude and latitude, height above sea level, reads soil temperature data, pH value, conductivity sensor data are carried out A/D conversion and corrected pH value, conductivity according to temperature data; Power module, adopts Large Copacity chargeable lithium cell to power, for system works provides power supply; Signal generator, utilizes AD9833 to produce frequency 500Hz, amplitude ± 2V, dutycycle 50% square-wave signal and provides input signal for conductivity sensor; LCD MODULE, utilizes JLX12864G-086 type Liquid Crystal Module display device; PH value amplifier, conductivity amplifier, by the enlargement factor of adjustment INA128 instrument amplifier, make pH value, electro conductivity signal output voltage value between 0-3.3V; Memory module, adopts CC2530 internal storage to store the temperature, conductivity, pH value, longitude and latitude, height above sea level etc. of measuring soil.

The utility model utilizes pH sensor to gather soil pH value data, utilizes conductivity sensor to gather soil conductivity, GPS module collection soil longitude and latitude, altitude information, utilize temperature sensor to gather the soil moisture to correct pH value, conductivity, and measurement data is stored.

Compared with the prior art, the utility model once can complete soil pH value, conductivity, temperature, testing location longitude and latitude, the isoparametric collection of height above sea level and storage, and utilize the soil moisture to correct pH value, conductivity, user forwards stored data to computing machine by serial ports and carries out treatment and analysis, during field survey, test data can be utilized to draw spatio-temporal distribution figure, and utilize this distribution plan comprehensively to analyze.

The utility model is mainly for detection of soil pH value, conductivity, the soil moisture, and the orientation of check point, detection time etc., it once can complete soil pH value, conductivity, temperature, testing location longitude and latitude, the isoparametric collection of height above sea level, detect and store, and utilize the soil moisture to pH value, conductivity corrects, user forwards stored data to computing machine by serial ports and carries out treatment and analysis, there is cost low, easy and simple to handle, measuring speed is fast, GPS positioning precision is high, field checking has been carried out in 16 test points of Huaihua City Hecheng District, field survey error is less than 2%.

Accompanying drawing explanation

This accompanying drawing is the utility model schematic diagram.

In figure, 1. soil pH value sensor, 2. soil temperature sensor, 3. soil conductivity sensor, 4. power module, 5. GPS module, 6. LCD MODULE, 7. pH value amplifier, 8. CC2530,9. conductivity amplifier, 10. soil conductivity sensor, 11. signal generators.

Embodiment

As shown in this figure, the utility model portable multi-function soil parameters sensing device, comprise soil pH value sensor 1, soil temperature sensor 2, soil conductivity sensor 10, described soil pH value sensor 1 is connected with CC25308 by pH value amplifier 7, soil conductivity sensor 10 is connected with CC25308 by conductivity amplifier 9, described CC2530 8 is connected with soil temperature sensor 2, memory module 3, power module 4, GPS module 5, LCD MODULE 6 respectively, and described soil conductivity sensor 10 is connected with signal generator 11.

Utilize CC2530 to build soil pH value, conductivity measurement hardware platform, this platform is made up of CC2530 minimum system, soil pH value sensor, soil conductivity sensor, soil temperature sensor, GPS module, memory module, power module, LCD MODULE.Soil pH value sensor exports and converts the output of 2V voltage to by pH value amplifier, 500Hz sinusoidal signal generator provides operating voltage to conductivity sensor, output voltage converts voltage to by automatic range adjustment amplification and exports, 12, the 8 tunnel ADC utilizing CC2530 to include carries out AD conversion, latitude and longitude information is sent to CC2530 by serial ports by GPS module, soil temperature sensor adopts digital 1-wire temperature sensor DS18B20, test data is stored in inner FLASH and shows in LCD MODULE by CC2530, also by serial ports by data conversion storage to computing machine, carry out further treatment and analysis, power module adopts Large Copacity chargeable lithium cell to power, can continuous coverage more than 6 hours.

The realization of systemic-function, CC2530 minimum system is by CC2530F256 chip, clock circuit, keyboard circuit, reset circuit, power supply forms, XTAL1 adopts the electric capacity of external two 15p of 32MHz crystal oscillator, XTAL2 adopts external two the 15p electric capacity of 32.768KHz crystal oscillator, reset circuit adopts electrification reset, power acquisition 3.3V powers, P1_5, external two touch-switchs of P1_4 carry out the setting of system, brilliant DataExpert electronics JLX12864G-086 type LCD MODULE is adopted to carry out data display, 4 line SPI serial line interfaces are adopted to be connected with CC2530, CC2530F256 includes 256K byte FLASH, up to ten thousand soil pH values can be realized, the storage of conductivity detecting information, do not need additional designs memory circuitry, do not lose for making the power down of FLASH data, programming is not erasable for powering on, but can carry out erasable according to keyboard setting.

Soil pH value sensor, its circuit adopts pH value electrode measurement soil pH value, can directly insert soil to measure, because pH electrode resistance value is comparatively large, the pH value amplifier adopting input resistance large is that instrument amplifier INA128 amplifies output voltage, by adjustment RG resistance adjustable enlargement factor, when pH value changes between 0-14, output voltage 0-3.3V, exports the P0_0 mouth meeting CC2530, utilizes 12 ADC of CC2530 inside to carry out AD conversion.

Soil conductivity sensor, its circuit adopts " current-voltage four-end method " to measure soil conductivity, AD9833 is adopted to produce frequency 500Hz, amplitude ± 2V, dutycycle 50% square-wave signal input conductance rate electrode, electrode output voltage is amplified by conductivity amplifier, conductivity amplifier adopts the large instrument amplifier INA128 of input resistance to amplify, output voltage changes between 0-3.3V, by adjustment RG resistance adjustable enlargement factor, export the P0_1 mouth meeting CC2530, utilize 12 ADC of CC2530 inside to carry out AD conversion.

Soil temperature sensor, because identical soil pH value and conductivity change greatly at different temperatures, soil temperature sensor adopts unibus digital temperature sensor DS18B20 to measure the soil moisture, utilizes measuring tempeature to correct pH value and conductivity.

GPS module, adopt the ATK-NEO-GPS-6M module of ALIENTEK company, this module is a high-performance GPS locating module, carry high-performance and have no chance ceramic antenna (without the need to buying active antenna), carry Chargeable backup battery to support startup temperature or warm start, 3.3V can be adopted to power, positioning precision 2.0mCEP, catch tracking sensitivity-161dBm, the warm start time only needs 1 second, module serial ports is directly connected with CC2530 serial ports, by the P1_2 of CC2530, P1_3 is configured to USART0, serial port baud rate supports 4800, 9600, 38400(gives tacit consent to), the multiple different rates such as 57600, baud rate is by R4, R5 is arranged.

During use, first initialization, comprise the I/O port initialization of CC2530, inner ADC initialization, liquid crystal display initialization, GPS initialization, serial ports initialization etc., judge that GPS is cold start-up or warm start, as then needed to recalculate almanac data for cold start-up, as being warm start, then directly read the almanac data stored, read gps data as required, the utility model only needs to read longitude and latitude data, user also can read height above sea level as required, usable satellite number, the data such as signal quality, then pH value is started, conductivity output voltage carries out inner AD conversion, by soil pH value sensor, the analog voltage that soil conductivity sensor exports converts digital signal to, read soil temperature sensor temperature data, calculate soil pH value, conductivity, correct according to temperature value, after calculating completes, by GPS longitude and latitude data, pH value, conductivity data is by determining that form is stored into inner FLASH, and be presented on liquid crystal.

Claims

1. a portable multi-function soil parameters sensing device, comprise soil pH value sensor (1), soil temperature sensor (2), soil conductivity sensor (10), it is characterized in that, described soil pH value sensor (1) is by pH value amplifier (7) and CC2530(8) be connected, soil conductivity sensor (10) is by conductivity amplifier (9) and CC2530(8) be connected, described CC2530(8) respectively with soil temperature sensor (2), memory module (3), power module (4), GPS module (5), LCD MODULE (6) connects, described soil conductivity sensor (10) is connected with signal generator (11).