SU993040A1 - Weighing device for determination of equal mass object quantity - Google Patents

Description

This invention relates to a weight measuring technique.

A weight device for determining the number of items of equal weight is known, which consists of a digital balance, a dividing unit, an indicator and an input data input panel 13 This device allows you to determine the number of items by weighing at a given unit weight of Items, but does not allow for parts in containers there is no automatic recognition of the type of part, so the weight of the part must be set using a potentiometer when it is weighed with a speed switch. This reduces the performance of the device, causes inconvenience of operation.

The closest in technical essence to the present invention is a weighing device for determining; a number of items of equal mass containing digital scales connected to the first input of the subtraction unit, the output of which is connected to the output of the storage unit of the scales of the container, and the output is the first input of the division unit, to the second input of which is connected the output of the storage unit of weights of objects and to the exit - one input of the indicator.

the other input of which is connected to the output of the memory unit of the prediction balance, and the input data input unit, the outputs of which are connected to the input storage units of the tar weight scales and items 1 2 J.

However, such a device has limited functionality — it is impossible to automatically recognize the types of objects weighed in a container, therefore information about the weight of the items must be entered into the device at each weighing.

The purpose of the invention is to expand the 5 functionality of the device by providing automatic recognition of the type of objects. .

The goal is achieved by inserting a block into the device.

20 memory of the weight of the first dimension, block. comparisons with an integer number and a unit for eliminating the multiplicity of objects weights, the input of the weight unit of the first measurement is connected to the output of the digital balance, and the output is connected to the third input of the subtraction unit, the input of the unit. the comparison with the integer is connected to the output of the division unit, the first output with the memory unit of the scales of the objects, and

30 second exit - with the elimination unit

the multiplicity of scales of objects, the output of which is connected to the memory block of scales of objects.

Fig, 1 noKasaifa block diagram of the device; in fig. 2 is a block diagram of a digital scale; FIG. 3 - block diagram of the storage unit of the container weights; FIG. 4 is a block diagram of a memory unit of weights of items; in fig. 5 is a block diagram of a comparison block with an integer; in FIG. Block diagram of the block eliminating the multiplicity of scales of parts. .

The device (Fig. 1) contains digital scales 1, subtraction unit 2, block 3 divisions, indicator 4, input data input unit 5, tare weight storage unit, items weighing unit 7, first measurement memory unit 8, unit 9 comparisons with an integer and block 10 eliminating the multiplicity of weights of objects.

Digital scale 1, subtraction unit 2, division unit 3 and indicator 4 are connected in series. The third output (tare weight and the fourth output (tare type) of the input data input unit are connected respectively to the first and second inputs of the tare weight memory block {numbers of inputs and outputs are shown in parentheses), the output of which is connected to the second input of readout unit 2 the input (weights) of the item and the second input. {of the item type) of the item weight storage unit 7 are connected to the first and second outputs of the input data input unit 5. The first output (weight, item) of the scale 7 memory unit of objects 7 is connected to the second input of the 3 division unit, and the second output (such as the object) is connected to the second input of the indicator 4. The input of the 8 weight memory block 8 of the first measurement is connected to the output of digital scales 1 and the output is to the third input of subtraction unit 2. The input of the comparison unit 9 with the integer is connected to the second output of the division unit 5, the first output is connected to the third (control) input of the object weight storage unit 7, and the second to the input of the object weight reduction unit 10, the output of which is connected to the fourth input of the unit 7

Digital scales 1 (Fig. 2) comprise a platform 11 on which a container is placed with objects, for example, parts. Platform 11 is supported on load cells 12, the signal from which is amplified by amplifier 13 and fed to analog-to-digital converter 14..

The memory block b block of tare weights (Fig. 3j contains a tare type register 15 whose output is connected to the first input (address) of the memory of node 16, whose second (informational) input and output are connected to the tare weight register 17. First output of local control unit 18 connected to the third (control input of the storage node 16, and the second output of the local control node 18 is connected to the third I control) input of the register 17. The unit 7 of the object weight memory contains the item type register 19, the first output of which is connected to the first (address; input node 20 of the weight of objects, the second (informational) input and informational output of which is connected to the weight register of the object 21. The third input of the register 21 is connected to the first output of the local control unit 22, (the second output of which is connected to the third (control) input of the node 20, the third the output is connected to the second (control) input of the node 23, the storage type of objects, and the fourth to the third (control) input of the register 19. The second (informational) input 23 is connected to the second register 19, and the output is connected to the first input of the register 19 det Is. The weight unit 8 of the weight of the first measurement is made in the form of a register. Block 9 of the comparison with the integer (Fig. 5) contains the fractional part register, the output of the higher bits of which is connected to the input of the circuit AND 25 and to the inverse input of the circuit and 26. The outputs of the circuit 25 and the circuit 26 are connected to the first and second inputs the OR circuit 27. The control output of the integer part register 28 is connected to the first input of the adder 29, the second input of which is connected to the output of the AND 25 circuit.

Block 10 of eliminating the multiplicity of weights of objects (Fig. B) contains a series-connected register 30, a subtraction circuit 31 and a series comparison circuit 32.

The device works as follows.

Information on the weights of all possible objects (parts) is recorded in memory unit 7 in accordance with the type of object (part). In this register 19, the type of part is recorded in the register; this information is sent to the address inputs of the node 20. In the register. 21 records information about the weight of the part. Thus, the type of each detail corresponds to the memory cell of the node 20 of the memory weight of the parts.

It is possible to change the recorded information: in the event of a change in the range of parts. For this, the information on the weight of the part in the node 20 is rewritten. The information on the tare weight is entered into the tare weight memory unit 6 in the same way. At each weighing from the input data block 5, information about the type of tarl is entered. according to the type of container, information on tare weight is read from node 16.

Tara with the details is set to. a platform 11 of a digital scale 1, whose pressure on the load cells 12 is converted last and into an electrical signal that is amplified by the amplifier 13. This signal is converted by the analog-digital converter 14 into a digital code corresponding to the total weight. This total weight value P is memorized by the weight unit 8 of the weight of the first dimension, after which any unknown quantity is removed from the container. details u. The digital code corresponding to the p2 weight and which is formed at the output of the digital scale 1 is fed to

; input of subtraction unit 2, which determines the difference P - Pj. This difference value sequentially divides with the unit 3 divided by the weight of each part, stored by unit 7 of memory of objects. In this case, the local control unit 22 generates successively the readout addresses, which, through the part type register 19, arrive at the address inputs of the storage unit 20, from whose information output the detail weight is recorded in the register 21. According to the signal of the local control unit 22, this information is read from the register 21 and is fed to the second input of the division unit 3. The magnitude of the quotient of dividing the difference P - RZ. HS The weight of each part goes to the first input of the unit.

9 comparisons with integer. Part of the code. The corresponding integer part of this value is recorded in the register part 28 of the integer part, and the part of the code corresponding to the fractional part is recorded in the register 24 of the fractional part. the output bits of register 24 are combined with an AND 25 circuit. This circuit generates an output signal in the case when the fractional part is close to unity with a given accuracy, and the quotient itself is close to the whole. Inversion of the senior output bits of the register. 24 are combined with an AND 26 circuit. This circuit generates a signal at the output when the fractional part is close to zero with the given accuracy, and the quotient itself is close to the whole. The outputs of the circuits AND 25 and 26 are combined by the OR circuit 27, the output signal of which is formed only in the case when the magnitude of the quotient with a given accuracy is an integer. This quotient corresponds to an unknown amount of parts removed from the container.

Recognition of parts is based on what is for the selected type. an unknown amount of parts removed from the container, and the whole

the number, in this case, at the output of the OR circuit 27, a signal is generated for which information about the type of part, stored by register 19, is fed to the second input of indicator 4. By the signal at the output of the circuit OR 27, information corresponding to the whole part of the quotient is read from the register 24 parts and arrives at the first input of the adder 29, the second input of which is connected to the output of the circuit AND 25. In the case when the output of the first circuit AND 25 is formed, a signal is added to the whole part of the private part. In the case when there are multiples of the weights of the parts, the recognition of the type of the part cannot be unambiguous. In this case, the comparison unit 9 selects several types of items. Information about the type of detuning is recorded in the node 23, which stores the types of parts, at the addresses formed by the local control unit 22 according to the signal generated at the first output of block 9. Information about the unknown number of parts withdrawn from the container calculated by the block of division 3 the comparison with the integer number is fed to the elimination multiplicity locker 10 of the parts and, in the case of an ambiguous determination of the type of part, is written into the register 30. Thereafter, one part is removed from the container. A new, unknown amount of parts removed from a container is defined for parts of recognized types. At that, local control unit 22 generates readout addresses for which information about the type of part is read out from node 23 and through register 19 enters the address inputs of node 20. At the same time, information about the weight of parts of recognized types is sequentially fed to the second input of the 3 division unit. Information about the new number of parts removed from the container is fed to the second input of circuit 31, Austria, to the first input of which information is received about the initial number of parts removed from the container, stored by the register 30. The difference of these quantities is fed to the bit comparison circuit 32, which compares the code corresponding to this difference with the unit code. In case of coincidence of these codes, the comparison circuit 32 produces a signal which is fed to the fourth input of the unit 7 of the scale of the part weights. By this signal, the information on the type of part is read out from the register 19 of the part type and is fed to the second input of indicator 4. At this, the recognition process of the type of part is over.

Claims (2)

The total weight information is generated by the memory unit 8 of the weight of the first dimension at the third input of the reading unit 2, the second input of which receives information about the tare weight R ,. from block b of memory of container weights. Block 2 read calculates the difference between Py P Р. This difference enters the division unit, at the second input of which information about the weight of the part of the recognized type is set. The partial weight of P – P per part weight, corresponding to the total number of parts, is fed to the first input of indicator 4. The proposed device is intended for use in automated parts accounting systems, for example, on the main assembly conveyors of machine-building enterprises. With the manual accounting of parts, inevitable high measurement error, labor productivity is low. When parts are recorded using known devices, it is necessary to recognize the part either by a person or by using various sensor systems that require high material costs for manufacturing and maintenance. In the proposed device, the recognition of parts is carried out automatically, by removing any unknown number of parts, calculating this quantity and comparing the value obtained with the whole number. The device allows to take into account details of any weight, including parts with multiple weights. The invention is a weighing device for determining the number of objects of equal weight, containing digital scales connected to the first input of the subtractor, to the second input of which the output of the tare unit of the tare balance is connected, and to the output the first input of the division unit to the second input of which is connected the memory unit of the object weights, and to the output - one input of the indicator, the other input of which is connected to the output of the memory unit of the scales of the objects, and to the output - one input of the indicator, the other input of which is connected to the output of the memory unit of the scales A set of input data, the outputs of which are connected to the inputs of the memory blocks of the container weights and items weights, characterized in that, in order to expand its functionality by providing automatic recognition of the type of the object, a weight memory of the first dimension is inserted into it , a comparison unit with an integer number and a unit for eliminating the multiplicity of objects weights, the input of the weight unit of the first measurement is connected with the d output of digital scales, and the output with the third input of the subtracting unit, the input of the comparison unit with an integer connected to the output of the dividing unit, the first output to the storage unit of the object weights, and the second output to the unit for eliminating the multiplicity of objects, the output of which is connected to the storage unit of the object weights. Sources of information taken into account in the examination 1. The author's certificate of the USSR 765663, cl. G 01 G 19/413, 1971. 2. For France of France No. 2119233, cl. G 01 G 19/00, published 1972 (prototype). L. A If f2 / J / T Ft IS I i fug.Z fff / J / // 2ff fug. 0t / f. (