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Temperature control circuit in the industrial and agricultural production has a wide range of applications, such as warehousing of food grain storage in the warehouse, the temperature inside the barn is an important factor in the safe custody of food, the paper describes the structure of PTCR, basic characteristics, main parameters, application and trends, the use of PTC thermistors, LM311, relays and other components of a simple temperature alarm device.
The experimental results show that when in contact with the probe by the PTCR temperature conversion by the power output of a circuit switch, if the temperature exceeds a predetermined value, then the switch is open, according to actual needs, the switch can directly control the sounds, lights, alarms, to sound, light and other forms of alerts you. Execution unit switch can also be connected, the measured environment temperatures, and to ensure that the environment temperature measured in a relatively safe temperature ranges.
The circuit structure is simple, low cost, easy to put into production, to overcome the original artificial temperature, waste of manpower, material resources of the shortcomings and improve the measurement accuracy, timeliness.
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Temperature control circuit in industrial and agricultural production is widely used in food, such as in the grain warehouse storage warehouse keeping the temperature inside the granary, is kept safe food, this article discusses the important factors of structure, basic characteristics PTCR, main parameters, application and development trend, using the PTC thermistors, relays, LM311 components, such as a simple temperature alarm device.
Experimental results show that, when PTCR probe by the contact with the power output circuit temperature switches, if temperatures exceed predetermined value, namely the switch can open, according to actual needs, switch can directly control sound, light, sound and light alarm in such form remind users note. Switches also can connect to the execution unit, to be measured cooling treatment, environment to ensure the environmental temperature measured by in a relatively safe temperature period.
This circuit is simple in structure, low cost, easy to put into production, overcome the original artificial temperature measurement, the waste of manpower and material resources, increase input, timeliness accuracy of measurement.