SU459268A1 - Device for automatic quality control of grain cleaning machine - Google Patents

Description

The invention relates to the field of control and management of grain separation processes, namely, devices for automatic quality control of a grain cleaning machine, and can be used in agriculture and in milling and elevator plants. A device for automatic quality control of a grain cleaning machine is known, comprising a flow sensor and a relationship unit. The purpose of the invention is to improve the accuracy of assessing the quality of the machine and the detection of losses of the valuable fraction in the waste. For this, the proposed device is equipped with an integrator, a classifier and a comparison unit, the latter being connected to the output of a ratio block, the input of which is connected to the classifier and the flow sensor through the integrator. FIG. 1 and 2 depict a functional and schematic diagram of the described device. The device for automatic quality control of the operation of the grain cleaning machine contains a sensor 1 for the consumption of a grain mixture, a converter 2, a relationship block 3, an integrator 4, a classifier 5, a comparison block 6, a setpoint generator 7, an amplifier 8 and a signaling device 9 connected to it 9. The matching unit 6 is connected with the output of the ratio block 3, the input of which is connected to the classifier 5 and the flow sensor 1 through the integrator 4. The classifier 5 is connected to the controlled sample former 10. The comparison block b is made on a discrete element connected to the setpoint 7 of the allowable loss level, and through the amplifier 8 is connected to the signaling device 9. The device operates as follows. The grain material entering the grain cleaning machine 11 passes through the flow sensor 1, as a result of which a signal corresponding to the instantaneous feed rate appears at the output of the converter 2. The received signal through the integrator 4, smoothing out random fluctuations of the instantaneous flow, at the command of the classifier enters the input of the unit 3 of the relation in which it is monitored until the loss signal from the classifier. After some time, the sample former 10 is triggered, controlled by the classifier, and a sample of the controlled fraction formed from several samples automatically selected by deflecting the flow is fed to the input of the latter.

Upon completion of the analysis and determination of the amount of the valuable fraction that has fallen into waste, the signal corresponding to this value from the classifier 5 is fed to the second input of the ratio block 3, the output of which (percentage of the valuable fraction in the waste) goes to the comparison block 6. The second input of the last station but connected to setting device 7 levels of permissible losses. If the level of the actual percentage of losses is more than the specified one, the output of the comparing unit 6 is turned on by a unit that switches the indicator 9 through the amplifier 8, and if it is lower than the specified one, the zero output state of the comparing unit 6 does not change and the signaling device 9 is not activated.

The cyclical operation of the device is defined by the programmer of the classifier 5.

Subject invention

A device for automatically controlling the quality of a grain cleaning machine, containing a flow sensor and a unit, of a relationship, characterized in that, in order to improve the accuracy of assessing the quality of the operation of the machine and detect losses of the valuable fraction that has fallen into the waste, it is equipped with an integrator, classifier and comparator unit, the latter is connected to the output of the ratio block, the input of which is connected to the classifier and the flow sensor through the integrator.

Fig 1

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