DEVICE FOR FORMING A TEMPERATURE PROFILE Russian patent published in 2022 - IPC G05B19/42 G05D23/20 G02B21/30 H01L35/28 

FIELD: laboratory equipment.

SUBSTANCE: invention relates to laboratory equipment and is intended for the formation of temperature effects during laboratory studies of stress resistance of agricultural plants on the example of seedlings of cereal crops. The device for forming a temperature profile consists of a laboratory hot bench having a zone for placing the roots of the seedling and a zone for placing the sprout, in which a copper plate is placed, in which two temperature sensors (measuring and emergency) are built. The Peltier element is attached to the lower part of the plate by the working side, on the other side of which a radiator with a fan is installed, located in the bench body. The thermostat is controlled by a control unit that contains a controller, one input of which is connected to the output of the temperature converter of the working temperature sensor, the second input is connected to the output of the working current sensor of the PWM converter, the third input is connected to the display, and the fourth to the keyboard. In this case, one output of the controller is connected to the first input of the PWM current converter, to the output of which the Peltier element is connected. The second input of the PWM converter is connected through the limit current sensor to the output of the protection circuit through which the PWM converter is connected to the power supply. The second input of the protection circuit is connected to the emergency temperature sensor. The controller is powered by a separate power supply. In addition, its fifth input via the USB data exchange bus can be connected to a PC of an automated experimental research system, which can also be connected to the controller input for remote start of the temperature profile forming device and to the output of the temperature converter of the working temperature sensor.

EFFECT: invention provides a series of identical experimental studies to assess the temperature effects on the object of study (plant seedling) to obtain identical temperature profiles, which ultimately increases the reliability of the data obtained during the experiments.

4 cl, 4 dwg