Intelligent greenhouse control system, modern agricultural Internet of things measurement and control system

Introduction to the Internet of Things Nonglai Intelligent Greenhouse Measurement and Control System

CM-2013 Internet of Things Nonglai Intelligent Greenhouse Measurement and Control System, also known as intelligent greenhouse control system or greenhouse controller, is a set of control management system developed by Handan Chuangmei Instrument in 2006 for greenhouse irrigation environment monitoring.

The system realizes the monitoring and control of greenhouse irrigation equipment, the uninterrupted collection, sorting, statistics and drawing of environmental data. It has an interface style consistent with WINDOWS, perfect memory management and friendly and intuitive operation.

1.1 Monitoring function:

Monitor the current status of various greenhouses, including information collection such as air temperature, air humidity, light intensity, carbon dioxide, soil temperature, soil humidity, conductivity, and other parameters, as well as the switching status of each device.

1.2 The controller uses:

Agricultural economical and practical type:

The 4-line 12-character display operation is simple and convenient, does not need to be connected to the calculation, and runs independently.

1.3 Setting function:

You can set the operating parameters of various greenhouses, such as soil humidity, soil temperature, conductivity, time and other parameters in the greenhouse to automatically control the target values ​​of solenoid valves, water pumps, fertilization systems, etc. And other parameters to automatically control the target value of skylights, side windows, inner sunshade, outer sunshade, fan, wet curtain, roll-over window, heating equipment, humidification equipment, carbon dioxide generator, etc.

1.4 Mandatory manual control function:

It is possible to implement forced manual control of the switching state of equipment in each greenhouse.

1.5 Manual / automatic switching function

It can flexibly and quickly realize the manual / automatic control switching of each device.

1.6 Data drawing and statistical functions:

It can draw the curve of a certain environmental data in a certain historical time period in a curve way, and can print it.

It can count various environmental data by year, month, day, and hour. Find the maximum, minimum, average and other information in any time period.

Richer control system interface, DEMO display software can be downloaded from the company website. Also welcome to contact the company to obtain.

2. Schematic diagram of civil greenhouse intelligent control system

1. Economical and practical

Air temperature and humidity sensor, light sensor, soil temperature, soil humidity, carbon dioxide, rain and snow, rainfall sensor, wind speed sensor, wind direction sensor.

1. The system can run independently without a computer. It is operated by a four-line Chinese display LCD screen. The operation is simple, intuitive, clear, beautiful and compact.

2. Control the start and stop of each equipment point, and can record the historical data of various sensors and various parameters in the greenhouse. And export it as EXCEL form. Or print directly

3. Hardware function of civilian greenhouse intelligent control system

The CM greenhouse intelligent automatic control system can automatically control the automatic actions of solenoid valves, water pumps, fertilization systems, etc. according to the soil humidity sensor, soil temperature sensor, time and other parameters in the greenhouse. Through the air temperature sensor, air humidity sensor, light sensor, carbon dioxide Sensors, rain and snow sensors and other parameters to automatically control the automatic actions of skylights, side windows, inner sunshades, outer sunshades, fans, wet curtains, rollover windows, heating equipment, humidification equipment, carbon dioxide generators, etc., to make the environment in the greenhouse Keep within the range set by the user.

The functions of the greenhouse intelligent automatic control system are based on soil moisture value, soil temperature, time, air temperature, air humidity, light, carbon dioxide, etc. The user can set the target value of its parameters, and the program controls and monitors according to the target value set by the user Solenoid valve, water pump, fertilization system, skylight, side window, inner sunshade, outer sunshade, fan, wet curtain, eversion window, heating equipment, humidification equipment, carbon dioxide generator and other equipment to ensure the above items in the greenhouse The parameter is within the target value range set by the user. The computer system does not need to be turned on, and the following YM controller can also independently run functions according to predetermined logic.

1.1 Greenhouse

1. 25 points of soil moisture (Note: 3 layers per point) coordinate with irrigation output

Note: When the soil moisture is lower than the target value set by the user, the irrigation output is turned on, and the time to turn off the irrigation output can also be set (the time is calculated according to the low limit of the soil humidity, and the water valve is turned off when the limit is turned on for N seconds. Water supply valve). At the same time, it can control the closing of the water supply valve according to the data collected by the flow sensor.

2. 25 points of soil temperature coordinate with irrigation output

Note: When the soil temperature is lower than the target value set by the user, the irrigation output is not turned on

3. Indoor temperature 12 points (Note: 2 temperature sensors per point)

Note: It is used to control the indoor temperature to keep it within the temperature environment set by the user.This sensor is used to control the opening and cooling equipment (such as: air conditioners, fans, etc.) of heating equipment (such as heating furnaces, air conditioners, etc.) Opening of skylights, side windows, wet curtains, etc.)

4. Indoor humidity 12 points (Note: 2 temperature sensors per point)

Note: It is used to control the indoor humidity to keep it within the humidity environment set by the user. This sensor is used to control the opening and dehumidification equipment of the humidification equipment (such as: humidifier, air conditioner, etc.) (such as skylight, side window, fan Etc.)

5. Indoor lighting at 2 points (Note: 5 lighting sensors per point)

Note: It is used to control the indoor light intensity so that it stays within the light intensity set by the user. This sensor is used to control the opening and shading equipment (such as: shading net, etc.) of the fill light equipment (such as fill light, shading net, etc.) )

6. Indoor co2 4 points

Note: The data collected by the sensor is compared with the target transmission set by the user.If it is lower than the target value set by the user, the CO2 generator is turned on to supplement CO2 and the target value measurement is stopped.

If it is higher than the target value set by the user, open the sunroof, side window, fan and other equipment to keep the CO2 concentration in the greenhouse within the range set by the user

Equipment: 1. Top-open window group 12 three-phase (Note: every 2 temperature and humidity control 1 group)

2. Side window group 2 three-phase (Note: every 2 temperature and humidity control 1 group)

3. 16 three-phase fan table (Note: every 2 temperature and humidity control 1 group)

4. Inner shade group 2 three-phase (note: every 2 temperature and humidity control 1 group)

5. Outer shade group 2 three-phase (Note: every 2 temperature and humidity control 1 group)

6. Wet curtain pump station 2 three-phase (Note: every 2 temperature and humidity control 1 group)

7. Two-phase three-stage sprinkler irrigation system (Note: there are 25 points of soil moisture control)

8. Illumination group 2 two-phase (note: every 2 lights control 1 group)

9. Three-phase slightly used switch group 3

10. Two-phase slightly used switch group 2

Sensor Introduction

1. Soil moisture sensor

The technical parameters are as follows:

. Measurement principle: FDR principle, probe length 5.3cm, 3 probes, observation of the central soil as the axis, diameter 7cm, height 7cm column soil moisture content; measurement frequency: 100Mhz

. Measurement parameter: volumetric water content

.Unit:% (m3 / m3)

.Measurement range: 0-100%

. Measurement accuracy: ± 3%

.Power supply: 5V—10V

.Output signal: 0 ～ 2.0VDC, TTL digital signal

.Stabilization time: 2 seconds after power on;

. Response time: <1 second;

.Working current: about 21mA;

.Sealing material: resin pouring, completely waterproof;

.Cable length: Standard is 1.5m

2. Soil temperature sensor

The technical parameters are as follows:

.Power supply: 12V 24V

.Signal: 4-20mA two wires

.Measurement range: -40-60 degrees Celsius

.Accuracy: 0.2 degrees Celsius

. The farthest lead length is 200 meters

.Producer Origin: Germany

. Probe size: @ 5 * 25mm stainless steel body

3. Indoor temperature and humidity sensor

technical parameter:

.Power supply: DC 12 ～ 24V

.Signal output:

Temperature: 0 ～ 20mA corresponding to -30 ℃ ～ 70 ℃

Temperature accuracy: ± 0.2 ℃

Humidity: 0 ～ 20mA corresponds to 0 ～ 100%

Humidity accuracy: ± 3%

. Communication method: 485 communication, transmission distance <1000 meters

. Communication rate: 9600, n, 8, 1

. Communication protocol: MODBUS protocol

Functions and features:

.Small appearance design, easy to install

.quick response

.Strong anti-interference ability

.long lasting

.Full calibration output, can be used interchangeably without calibration

.Based on on-demand measurement, very low power consumption, good stability

Scope of application:

.Widely used in agriculture, forestry, meteorology and other industries as well as climate room, storage and other places.

Fundamental:

This series of products adopts a highly integrated temperature and humidity sensor chip, digital output of the chip full range calibration. It uses patented CMOSens technology to ensure that the product has extremely high reliability and excellent long-term stability. The sensor includes a capacitive polymer humidity sensitive element and a temperature sensitive element made of energy gap materials. These two sensitive elements are designed on the same chip as a 14-bit A / D converter and a serial interface circuit . The sensor has excellent quality, super fast response, strong anti-interference ability, and high cost performance. Each sensor chip is calibrated in a very precise constant temperature chamber, with a mirror-condensation dew point meter as a reference. The calibration coefficient obtained by calibration is stored in the OTP memory of the chip in the form of a program. Through the two-wire serial interface and internal voltage adjustment, the peripheral system integration becomes fast and simple.

4. Light sensor

technical parameter:

.Power supply voltage: 12V ～ 24V DC

.Output signal: 4 ～ 20mA

.Output load: 500Ω

.Light range: 0 ～ 100KLUX

.Response time: 100ms

.Ambient temperature: -20 ～ 80 ° C

.Accuracy: ± 5%

Functions and features:

. Small size, easy to install

.The shell structure design is reasonable and the service life is long

.Good sealing

.High measurement accuracy and good stability

.Long transmission distance, strong anti-interference ability

. Reasonable structure design, good appearance quality

Scope of application:

.Can be widely used in the environment, greenhouse, laboratory, aquaculture, construction, high-end buildings, industrial plants and other light intensity measurement.

5. Carbon dioxide

Power supply: 24VDC / VAC (± 10%)

Power consumption: average <60mA; peak value <200mA

Range: 0 ~ 2000 ppm

Accuracy: ± 50 ppm + 3% of reading

Temperature drift: ± 0.2FS / ℃

Stability: Drift <2% (15 years)

Repeatability: drift <1%

6. Wind speed sensor

technical parameter:

· Range: 0 ~ 30 m / s

· Power supply voltage: 5V ~ 24 V DC

· Output signal: pulse (each pulse corresponds to 0.66m / s)

· Accuracy: ± 1m / s

· Load capacity: ≤500Ω

· Starting wind force: 0.2 m / s

7. Wind speed sensor

technical parameter:

· Measurement range: 16 directions (360 degrees)

· Measurement accuracy: ± 5%

· Input voltage: 5V ～ 24 V DC

· Output signal: switch signal / current signal / voltage signal

· Potential lead: three-core / nine-core

8. Outdoor temperature and humidity sensor

technical parameter:

.Power supply: DC 12 ～ 24V

.Signal output:

Temperature: 0 ～ 20mA corresponding to -30 ℃ ～ 70 ℃

Temperature accuracy: ± 0.2 ℃

Humidity: 0 ～ 20mA corresponds to 0 ～ 100%

Humidity accuracy: ± 3%

. Communication method: 485 communication, transmission distance <1000 meters

. Communication rate: 9600, n, 8, 1

. Communication protocol: MODBUS protocol

Functions and features:

.Small appearance design, easy to install

.quick response

.Strong anti-interference ability

.long lasting

.Full calibration output, can be used interchangeably without calibration

.Based on on-demand measurement, very low power consumption, good stability

9. Rain and snow sensor

Power supply: 5V-12V

Output signal: switch

Sounding time: 10 seconds

10. Rain sensor

technical parameter:

. Caliber of rain bearing: φ160mm

.Measurement range: ≤8mm / min

.Resolution: 0.5mm

.Error: ± 4%

. Weight: about 3 kg

.Output signal: single dry reed on and off, 4PLUS / MM (anti-interference resistance 100 ohm and capacitance 0.01 microfarad)

.Working environment temperature: -20 ～ 80 ℃

Functions and features:

.High precision and good stability

. Small size, easy to install

.Good linearity, long transmission distance, strong anti-interference ability

.The supporting system of tipping parts is well-made and the friction torque is small, so the tipping parts are sensitive to turn, stable performance and reliable work.

.The instrument shell is made of stainless steel, with strong anti-rust ability and good appearance quality.

.The rain-bearing mouth is made of stainless steel skin, which has high smoothness and small error caused by water stagnation.

control function

4.1 User login

The user's use authority is stipulated, and non-users cannot log in to the system to ensure the safety of the system. You can set permissions to modify users and passwords. There are two levels of authority: greenhouse inspection authority and parameter modification authority.

4.2 System monitoring

Monitor the air temperature, air humidity, light intensity, carbon dioxide, soil temperature, soil humidity, conductivity and other parameters in the greenhouse. Actions and status of various equipment; sound and image alarm when abnormality occurs in the greenhouse.

4.3 Control function

Automatic and manual conversion;

Automatic: According to the parameters set by the user, such as soil humidity, soil temperature, conductivity, time and other parameters in the greenhouse, it can automatically control the automatic operation of the solenoid valve, water pump, fertilizer system, etc., through the air temperature, air humidity, light, carbon dioxide, And other parameters to automatically control the automatic actions of sunroof, side window, inner sunshade, outer sunshade, fan, wet curtain, sash window, heating equipment, humidification equipment, carbon dioxide generator, etc.

Manual: realize the opening, closing and starting and stopping of various control devices through mouse operation, and realize the remote forced manual control operation.

4.4 Parameter setting and browsing

Set the parameters to be automatically controlled (soil humidity, time, soil temperature, conductivity, air temperature, air humidity, carbon dioxide, light intensity, etc.) to meet the requirements of automatic control.

4.5 Real-time curve

The real-time trend curve can display the data in the greenhouse collected by the system in the form of a real-time curve, so as to observe the detection status of the system.

4.6 Historical Curve

It can display the daily, monthly, seasonal and annual parameter change curves of various measurement parameters in the greenhouse, and the system parameter values ​​can be set reasonably according to this curve. And analyze the impact of various parameter changes on crop growth.

4.7 Report

The data measurement results in the greenhouse can be stored in the form of a report to analyze and browse each parameter.

4.8 Print

It can print historical curves and reports to facilitate data query.

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