SU1495833A1 - Device for counting objects transported by conveyer - Google Patents

Abstract

The invention relates to automation equipment and is intended to count objects placed in a row on a rigid base moved by a conveyor and can be used, in particular, in the building materials industry in enterprises producing bricks and using automatic brick-laying machines. The aim of the invention is to improve the accuracy of the device. It contains the first, second and third sensors 1, 2 and 3, the sensor 4 of the speed of movement of the conveyor, the first element And 5, the inverter 6, the generator 7 pulses, the divider 8 frequency, the second element And 9, the counter 10, the driver 11 pulses and the recorder 12 The device counts all bricks regardless of their location, eliminates the error introduced by changing the speed of the conveyor, and stops counting when the conveyor is stopped. 1 il.

Description

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The invention relates to automation equipment and is intended to account for the items installed; in a row on a rigid base moved by the conveyor and can be used, in particular, in the building materials industry in enterprises. Brick-making and using brick-laying machines. .

The purpose of the invention is to increase the accuracy of the device.

Laying bricks on the drying cars is as follows.

Clay bar, pressed by a press, is cut into bricks, which are fed by an intermediate conveyor to a brick laying machine on drying cars. In the process of moving, the bricks are moved apart to obtain a technological gap between them and are laid on a rigid base — a frame of an average of 10 pieces each. The frame is fed to a roller / conveyor stacker that has no drive, i.e. the speed of movement of the frame is determined by the speed given to the frame by the previous mechanism. The frame reaches a predetermined end position and is fed to the drive of the automatic stacker, which then fills the drying trolley with frames with bricks.

In the process of transporting bricks to the stacker, violations in the separation of bricks are possible, k also occurs overturning, especially sweating bricks into a die. At the same time, this section of the production line is the only one where brick accounting is possible by relatively inexpensive and simple means. Accounting accuracy is a basic requirement, since each unrecorded brick, for example, on a die, on a frame is 10% of the total.

The drawing shows the functional diagram of the device.

The device contains the first 1, second 2 and third 3 sensors S, the sensor 4 speeds of movement of the conveyor, the first element 5, the inverter 6, the pulse generator 7, the frequency divider 8, the second element 9, the counter 10, the driver 11 pulses and the recorder 12.

The device works as follows.

The generator 7 pulses produces a given number of pulses per unit

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the length of the size of the brick, passing the zone of action of sensors 1 - 3, i.e. works with this frequency. To eliminate the effect of changing the speed of movement of the conveyor on the accuracy of the metering, the pulse generator 7 is controlled by a sensor 4 of the speed of movement of the conveyor, for example a tachogenerator fixed on the axis of one of the conveyor rollers. As a pulse generator 7, a voltage controlled generator can be selected. The generator is controlled in such a way that with an increase in, for example, the speed of the conveyor, its frequency so as to store a specified number of pulses per unit length of the size of a brick passing through the range of sensors 1-3,

Next, the pulse is counted by the counter 10. B. The recorder 12 outputs a pulse after counting the number of pulses per brick size.

Frequency divider 8 is adjusted so that the specified number

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located on the die - i.e. preserved the same as for a brick that is in an upright position.

The condition for the passage of pulses from the generator 7 and the frequency divider 8 to the counter 10 is the simultaneous presence of signals from sensors 1-3, representing, for example, a photo relay, at the inputs of the first 5 and second 9 elements AND, their outputs are connected by mounting OR. When moving the frame with bricks, the sensor first works

1 (presence of a frame), and then in the case of the presence of a brick, the sensors trigger

2 and 3. In this case, all the inputs of the element And 5 have signals, and the pulses from the generator 7 pulses pass to the counting input of the counter 10. The element 9 in this case does not pass the pulses from the frequency divider 8, because at the corresponding input of the element 9 no signal from sensor 3 due to inverter 6.

In case it is in range; sensors 1 - 3 there is a brick on the plow; from the output of sensor 3 there is no signal. Under this condition, at the corresponding input of the element And 9 for. A cut-out inverter 6 signal appears, and conditions are created for the passage of pulses to counter 10 at a reduced frequency from frequency divider 8. At that

At the same time, the signal from sensor 3 at the input of element And 5 is absent and the pulses from the generator 7 of pulses do not pass to counter 10,

When the rear edge of the frame passes through the zone of the sensor 1, the pulse shaper 11 produces a reset signal for the counter 10. This also eliminates the error due to the deviation of the brick dimensions from the norm. If the conveyor stops at any position of the frame with respect to the sensors 1–3, the brick counting stops as the signal from the sensor 4 of the conveyor speed at the input of the generator 7 pulses disappears and the pulses at the generator output 7 disappear respectively.

Thus, the device counts all the bricks, regardless of their location, eliminates the error introduced by changing the speed of the conveyor, stops counting when the conveyor is stopped.

Claims (1)

Invention Formula A device for counting objects moved by a conveyor, containing the first and second sensors, the conveyor speed sensor, the first and second elements AND, the pulse shaper and the counter, the output of the first element AND is connected to the counting input of the counter, the output of the second sensor is connected to the first input of the first element AND , characterized in that, in order to improve the accuracy of the device, a pulse generator, a frequency divider, an inverter, a third sensor and a recorder are introduced, the output of the first sensor is connected to the second input of the first the first input of the second element And through the pulse shaper with the input of the initial installation of the counter, the output of which is connected to the recorder, the output of the second sensor is connected to the second input of the second element And, the output of which is combined with the output of the first element I. the output of the third sensor is connected to the third input of the first element And through the inverter with the third input of the second element And, the output of the speed sensor of the conveyor is connected via a pulse generator to the fourth input of the first element And and to the input of the frequency divider, you od which is connected to a fourth input of the second element I.