Watering control system is used for keeping a set moisture level in soil at the cultivation fields of vegetables or other cultivations. The controller can switch on the watering devices (pumps, watering section values of the sprinkler heads etc.) adequately to a day time and a measured moisture level in soil, and additionally in function i.e. air temperature and humidity, precipitation and other meteorological parameters. The control device is designed for assembly in the protected rooms or in the open filed using the protective cases.
The system works autonomously based on a regulator LB-600. The
regulator has a possibility of communication with a computer. The
computer software (LBX program) allows on remote change in the control
parameter settings as well as the measurement registry. The controller
has a package structure, which allows on choosing a set of inputs and
outputs for the necessity of a planned watering system. The
possibilities of program configuration are very wide and allow on
creating many functions adjusting to individual needs of a certain
control option. The regulator’s detailed parameters can be found on the
web page concerning
Picture 1 The devices cooperating with the regulator LB-600:
A, – the watering devices (sprinklers), B - the electromagnetic valves cutting the water supply, C - a pump powering the watering devices, D - a water tank, E - the soil moisture sensors, F - a mast with the devices for climate measurement (wind, rainfall, insolation, temperature, humidity and pressure), G – a protective case for a regulator and an electric switchgear.
The following executive elements can be attached in example to the
The output watering regulation signals are the results of the
balance calculations of a cultivation’s demand in water, based on a
value of a set demand and the actual measured values: soil moisture and
temperature, air humidity and temperature, precipitation and other
additional values. When generating the control signals, beside the
numerical calculations also the time dependencies are taken into
consideration, so the watering is performed in an optional time.
Because of a configuration’s elasticity it is possible to
realize the additional functions through a servo such as i.e. doping of
water which supplies the cultivations of the liquid fertilizers.
Picture 2 A block scheme of a watering control system installation:
A - the soil moisture measurement sensors, B – an air hytherograph, C - a precipitation meter, D - a wind force and direction meter, E - a controller-regulator LB-600, F - an acoustic signaler, G - a computer cooperating with the LBX program, H - the electro-magnetic valves of water power supply, I- a water pump controlled fluently, J - the water pumps controlled on/off, K - an inverter.
LB-600 is a package
device, which allows on choosing the configurations of the inputs and
outputs depending on the needs. The example displayed above of
the watering control system was introduced for the following
configuration of the inputs and outputs:
The set’s construction and control software’s work was evaluated with consulting the experts and producers of the filed cultivations. Because of the modern regulators’ construction there is a possibility of multiple, independent program work entry to the regulators. The regulators LB-600 can work in common installation with the other regulators and recorders.
The regulator-controller can cooperate with any electro-magnetic
valves and the pumps using adequate transmitter blocks and contractors
as well as the valves controlled in a constant way (directly or by
using the inverters).
The regulator-controller can cooperate with random executive devices
controlled on/off using the adequate transmitter blocks and contractors
or controlled in a proportional way (directly or by using the
inverters) analogue signals.
|BASIC PARAMETERS OF A
|MEASUREMENT / CONTROL
||SCOPE OF MEASUREMENT||COMMENTS|
|Soil moisture measurement
|Air temperature measurement
|Air temperature measurement||0..100%||for the temperatures up to +60°C|
|Valves, pumps, servos, and other executive devices controlled
||Through selecting for a device transmitters and
|Valves, pumps, servos, and other executive devices controlled analogously.||Random devices (i.e. controlled inverters 4...20mA/0...10V)
||Selected individually to a device.
The LAB-EL company provides as a set the measurement and regulation
devices: the controller LB-600 and the soil moisture sensors, air
temperature (possibly other such as: air humidity, pressure, air force
and direction etc.). The electric installation of the devices can be
performed by the groups of the local installers with adequate
qualifications or recommended by the LAB-EL company cooperating
The LAB-EL company assures warranty service (12 months) and a full
after warranty service on the territory of the whole country. The
warranty service does not cover the costs of service’s travel to
client, unless settled otherwise with a person performing the
The cost of a control system installation is introduced by the
LAB-EL company upon an individual request. The cost of an installation
“ready to be used” is introduced by a company recommended by the LAB-EL
company upon an individual request.
The effective work of the devices is undeniably influenced by a user’s understanding of the details concerning the device’s work principles and the methods of selecting the correct regulator. The LAB-EL company organizes the training courses concerning the scope of the offered devices for the users, distributors and system maintenance staff.