SU765663A2 - Weighing apparatus for determining the quantity of objects of equal mass - Google Patents

Description

This invention relates to a weight measuring technique. Basically avt. No. 558175 describes a weighing device for determining the number of items of equal weight H | delays, count the number of items in the party. However, the remainder in the cyclic meter of this device is not used to round the measurement result, which reduces its accuracy. The purpose of the invention is to improve the accuracy of the device. This is achieved by introducing a bit divider into the proposed device, and supplying a mass converter with an output with a multiplied frequency, the output of the coincidence circuit being connected to the input of a counter of the number of objects through a frequency divider, and the cyclic counter input being connected to the output with a frequency multiplied parallel but with which to the output of the mass converter there is an inlet. The drawing shows a block diagram of the proposed device. The device contains a load-receiving platform 1, a weight converter 4 of the batch of objects into the number of pulses, a control circuit 3, a mass batch counter 4, a mass batch indicator 5, a cyclic counter 6, a unit mass setpoint 1 of one object, an encoder 8, a mass indicator 9 of one object a coincidence circuit 10, a counter 11 of the number of items in a batch, an indicator 12 of the number of items in a batch, a delay circuit 13 and a divider 14 hours; tota by two. The force from the load-receiving platform 1 is transmitted to the converter 2, the input of which is connected to the output of the control circuit 3, and the output is connected to the input of the counter {a 4. The output of the latter is connected to the input of the indicator 5 of the mass of a batch of objects. The output of the converter 2 is connected to the first input of the cyclic counter 6, the output of which bits are connected to the first inputs of the bits of the coincidence circuit 10, the second inputs of which bits are connected

the outputs of the bits of the encoder 8. To the inputs of the encoder are connected the outputs of the setpoint 7 of the mass of one object, the other outputs of which are connected to the inputs of the indicator 9 of the mass of one object. The output of the coincidence circuit 10 is connected to the input of the frequency divider 14 by two and the input of the delay circuit 13, the output of which is connected to the second input of the loop counter b. The output of the divider 14 is connected to the input of the counter 11, the output of which is connected to the inputs of the indicator 12 of the number of items in the batch.

The device works in the following way.

The mass of one object is set with the help of the setting device 7. A batch of objects, the number of which is to be determined, is placed on the lifting platform 1. The force created by the mass of objects is transmitted to the converter 2, which converts this force into the proportional number of pulses supplied to the mass 4 . Converter 2 simultaneously generates a series of pulses, the number of which is 2 times the number of pulses at the first output supplied to the input of the cyclic counter 6. To the coincidence circuit 10, the encoder 8 is fed the number from the setpoint 7 and the number from the cyclic counter b. When the numbers supplied to the coincidence circuit 10 coincide, the latter produces a pulse, which is supplied to the frequency divider 14 by two and at the same time the same pulse delayed by the circuit 13 sets the counter b to the zero state.

As the pulses from converter 2 arrive, the cycle repeats.

Since the cyclic counter 6 receives 2 times more pulses than the input of the mass counter 4, the number of output pulses of the circuit does not coincide 10 is 2 times more than the number of parts, and corresponds to the whole number of halves of parts.

By dividing this number of pulses by 2 using the divider 14, the number of pulses is obtained, corresponding to more than the number of parts in a batch. The divider 14 is set at the beginning of each weighing to such a position that the counter 11 counts the first operation of the matching circuit 10 and all subsequent odd operations.

As a result, if the number of pulses produced by converter 2 corresponds to the mass of a whole number of parts plus the mass of less than half of a part, then the information in counter 11 is equal to a whole number of parts, and if the number of pulses produced by converter 2 corresponds to a mass of a whole number of parts plus mass more than half of the details, the information in counter 11 is equal to the whole number of parts plus one.

Thus, the device produces not only the counting of a whole number of parts in a batch, but, in contrast to the known, and the rounding of this quantity. Therefore, the accuracy of determining the number of parts in the proposed device is twice as high as in the known one, since the error in determining the quantity in the known device is 1 pc, and in the proposed one, 0.5 pc.

Claims (1)

Invention Formula A weight device for determining the number of items of equal mass according to the ed. St. 558175, characterized in that, in order to improve accuracy, a frequency divider is inserted into it, and the mass converter is equipped with a frequency multiplied output, the output of the coincidence circuit is connected to the input of the number of objects through a frequency divider, and the cyclic counter input is connected to the frequency multiplied output in parallel with which the input of the mass counter of a batch of objects is connected to the output of the mass converter.