Device for controlling phenomena periodicals

摘要

The invention relates to a monitoring device for periodic processes which is used in agricultural machines. The object of the invention consists in creating a monitoring device for periodic processes which stores all detected deviations and makes it possible for the monitoring operation to be accurately synchronised with the working operation of the machine whilst the period for storing the detected deviations is connected with the operating requirements of the machine. The device is characterised by the fact that the second output of each of the counting decades is connected to the corresponding inputs for setting the counter (8) to the state "9" whilst the inputs (R 9-1) of the decades are connected via a NOT circuit to the output of a second counter (15). The outputs (A, B, D) of the latter are connected via a third and fourth NAND circuit to the R inputs of two R-S triggers (19, 20). The S input of the first R-S trigger is connected to the inverting output of the second R-S trigger, the S input of which is connected to the inverting output of the monostable multivibrator (5). The output of the first R-S trigger (19) is connected to the second inputs of the amplifiers and to the second input of the alarm block (10). The output of the second R-S trigger (20) is connected to the zero-setting inputs of the second counter whilst the second input of the NAND circuit is connected to the speed selection transmitter and to the third input of the alarm block. The device has the advantages that it secures the storage of all detected deviations and also provides for storage after the machine has stopped until it is used again. IMAGE