FIELD: means of communication.
SUBSTANCE: device is designed for protection of inspection holes of underground utilities. The elements controlled are connected to the microprocessor-based controller by a matrix circuit by means of wires. The elements controlled are made as at least two parallel-connected electric circuits turning on close contact sensors and resistors of assigned rated values. Relationship of resistor resistances is optimum for all possible states of the sensors in circuits. It enables to obtain resulting values distinct from one another to a maximum degree which raises accuracy of recognition of the real state of each of the sensors. The data collected is transmitted by the microprocessor controller by a communication channel to the central control room.
EFFECT: undisturbed operation of the data collection device in adverse climatic conditions.
1 dwg
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