SU1647612A1 - Device for accounting transported items - Google Patents

Description

The invention relates to the automatic accounting of finished products moving along the conveyor.

The aim of the invention is to increase the accuracy of accounting for the disordered flow of bags without the use of special measures for their separation.

The drawing shows a functional diagram of the device. 10

The device contains a weight sensor 1, a conveyor speed sensor 2, a position sensor 3, an element NOT 4, a counter 5, a decoder 6, elements OR 7 <... .7 η groups, trigger 8 (... 8 ^, 15 actuator 9 , OR element 10, second counter 11, display unit 12, multiplication unit 13 and a voltage converter 1 _x 4 in the gate /

A weight sensor 1, a speed sensor 2, 20 a multiplication unit 13, and a voltage to frequency converter 14 constitute a weight meter.

The device operates as follows. 25

The conveyor moves the bag into the range of the weight meter. The weight meter (belt scales) works according to the following algorithm. The weight sensor 1 generates a signal at its output, proportional to the load on the conveyor. Sensor 2 for- ¹ miruet speed signal proportional to the speed of the conveyor. The signals from the sensors 1 and 2 are multiplied in block 13 35 and converted in the voltage converter 14 into a frequency, into rectangular pulses, which are fed to the counting input of the counter 5.

In the absence of a bag in the area of the weight meter, the signal from the sensor 3 through the element NOT 4 resets the counter 5 and passes through the elements OR 7 |, ... 7c, resets the trigger 8), ... 8 ^.

When the bag is in the zone of the weight meter 45, the sensor 3 generates a signal, which, inverting with the element NOT 4, allows the counter 5 to work. The output code of the counter 5 is fed to the decoder 6. When the code corresponds to the lower allowable weight value arrives at the decoder input, At the first output of the first pair of outputs of the decoder 6, a high-level signal is formed that sets trigger 8 to a single state. When the bag leaves the range of the weight meter with a signal from the sensor 3 through the element NOT 4 and the element OR 7 trigger 8 is reset, forming a counting pulse, which, passing through the element OR 10, is fed to the input of the counter 11, the state of which is displayed by the display unit 12. If the second bag goes along with the first without a gap, then when the code corresponding to the upper permissible value of the weight of the first bag arrives at the decoder, the second output of the first pair of decoder outputs has a high-level signal that transfers trigger 8 through the OR 7 element (to the zero state. This ends bag formation.

When a code corresponding to the lower permissible value of the weight of two bags arrives at the decoder inputs, a high level signal is generated at the first output of the second pair of decoder outputs, which transfers the 8 ^ trigger to a single state. When the second bag leaves the range of the digital weight meter, the position sensor sets the counter 5 to the zero state through the pulse shaper and, through the OR element 7 ^, transfers the trigger 8 _а to the zero state. The pulse generated at the output of the second trigger indicates the passage of the second bag through the conveyor.

If a group of η bags follows the conveyor without a gap, then high-level signals will appear sequentially on η pairs of decoder outputs, and the passage of η bags will be recorded on the second counter. The maximum possible number η is calculated on the basis of the nominal weight of one bag, the error in weighing one bag during packaging, and the error in the applied digital weight meter.

It is possible that the number of bags going through the conveyor without a gap will exceed the allowable p. Then a high level signal will appear at the (2n + 1) -m output of the decoder, which will stop the bags moving through the actuator 9.

Claims (1)

Claim A device for metering moving products containing position and speed sensors, an element NOT, the first and second counters, a decoder, a unit 5 indications, an actuating element, an OR element, a first trigger, the output of the position sensor through the element is NOT connected to the installation input of the first counter, the outputs of which are connected to the inputs of the decoder, the first output of the first pair of outputs of which is connected to the first input of the first trigger, characterized in that, in order to improve the accuracy of counting, a weight sensor, a multiplication unit, a voltage to frequency converter, a group of η OR elements and p-1 triggers are introduced into it, the outputs of the weight and speed sensors are connected to the inputs of the multiplication unit, the outputs d through which a frequency voltage converter connected to the counting input of the first counter, the second output of the first pair of the decoder outputs is connected to first input of first OR element group OR 1647612 * the output of which is connected to the second input of the first trigger, the output of which is connected to the first input of the OR element, the output of which is connected 5 with the input of the second counter, the output of which is connected to the display unit, the first output of each i-th pair of decoder leads is connected to the first input of the corresponding i-ro trigger, the output of which is connected to the i-th input of the OR element, the second output of each i-th pair the decoder outputs are connected to the first input of the corresponding 15th element OR of the group of elements OR, the output of which is connected to the second · input of the corresponding i-ro trigger, the output of the element is NOT connected to the second inputs of all elements OR 20 of the group of OR elements, the first output n + 1 pairs you odov decoder connected to the input of the actuator.