SU1278606A1 - Weight-measuring device - Google Patents

Abstract

This invention relates to a weight measuring technique; to devices that allow automatic consideration of the tare weight. The invention is aimed at speeding up while simplifying the device, as well as automating the selection of the mode of operation. During the measurement, the code from the analog-to-digital converter 2, corresponding to the measured load on the load cell sensor 1 (DM), is fed to the current weight counter 8, where it is added to the number corresponding to the initial load on the SD 1. If the load on the SD 1 has increased, then the counter 8 enters the number corresponding to the increment of the load. In the weight counter 13, the number of pulses arrives, which is equal to the net weight. The presence of a trigger 10 characters allows registering the number of net weight with a sign | indicating the mode of operation - zag (L or unload. 1 or s. 00

Description

; The invention relates to weighing technology, in particular, to devices that automatically take into account tare weight, and is intended for use in industry, mainly in automatic weighing and dosing systems.

The aim of the invention is to improve the speed while simplifying the device, as well as automating the selection of the mode of operation.

The drawing shows a structural diagram of the weighing device.

The circuit contains a force-measuring sensor 1, an analog-to-digital converter 2, the first 3 and second 4 coincidence circuits, the first 5 and second 6 circuits 2IL, the initial weight counter 7, the current weight counter 8, the first 9 and second 10 D-flip-flops, 11 pulse generator ZI circuit 12, net weight counter 13 with recorder 14, control unit 15.

The weighing device operates as follows.

Before the goods to be weighed on the weighing device, the initial load on the sensor is measured in the scales or after the container reaches the metering position before the beginning of the metering. The signal from the force-measuring sensor 1 is converted by the analog-to-digital converter 2 to the digital sequence code Kd, which enters the current weight counter 8. At that time, a digital code T, in addition to the number in the current weight counter, is formed in the initial weight counter 7.

N.

10 - R

dream about

where n is the number of decimal places

counter of initial and current scales.

The process of forming a number in count 7 of the initial weight is as follows.

Before the beginning of the first measurement, in the initial weight counter 7, some arbitrary initial number N is found. Before the measurement by the signal from the control unit, the Initial state of the trigger 9 is set, the net weight counter 13, the analog-digital converter 2 are set to 7, the initial weight is recorded in the current weight counter 8.

entrances. In the process of measurement, the input code of the counter 8 from the output of the analog-to-digital converter, 2 receives a serial code NQ.B counter 8

c is the sum of two numbers of N ,, +

JkN

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15

20

25

thirty

35

40

45

50

55

N

If the sum is greater than 10, then the trigger 9 is set in the measurement process 11 | in 1, then through scheme 3 matches, scheme 2IL b and scheme 4 matches to the input of counter 7 receives a number equal to N - 10, which is subtracted from the contents of counter 7. In the counter 7 to the end of measurement there is a number equal to N - (N + N - Yu-) 10 - N ..

If by the end of the measurement the trigger 9 is in O, then the current weight counter 8 is filled through the ZI 12 circuit and the 2ILI circuit 5 from the 1 lmpulse generator until the trigger 9 is set to the state 1. At the same time, the input of the initial weight counter 7 through the ORIL circuit b comes the same number of pulses as in the counter 8 of the current weight, which is 10 - (N + N). This number is added to the contents of my counter 7. As a result, the counter 7 has a number equal to

N, + Yu - (N + NJ.

The pa6otb counter of counter 7 for addition or subtraction is determined by the state of the trigger. 9. The signal from the control unit 15 to the input of the coincidence circuit 4 permits the formation of a number in the initial weight counter 7 only at the stage of measuring the initial load. After the end of this reference, the resolving signal is removed, and the information in the initial weight counter 7 remains unchanged throughout the entire measurement time of this product (or during the entire dispensing time).

The process of determining the net weight is as follows.

Before the measurement is started, the initial state of flip-flop 9, the counter 13 of the net weight and the analog-digital converter 2 are set up by the signal from the control unit 15. With the same signal, the number from the initial weight counter 7 is recorded at the installation inputs to the current weight counter 8. In the process of measurement, the code from analog-digital converter 2, corresponding to the measured load on the force measuring sensor 1, enters the current weight counter 8, where it adds up to the number N,

a dream

and production- + K 10.

corresponding to the initial load on the load sensor 1. If the load on the sensor has not changed, then the current weight meter receives the number N and the addition 10 – N, and the initial weight counter is zeroed, trigger 9 is set to one at the end of the measurement and the input of the net weight counter is nothing arrives,

In the event that the load on the sensor has increased, a number equal to

NO +

N,

where N |. - number, corresponding to 10 + N

load increment,

As a result of the addition

10 - N + N, the n-flip-flop 9 is set to one state, after which the net weight counter 13 receives the number of pulses equal to N;., I.e. net weight The process of determining the net weight occurs simultaneously with the measurement of the current weight, i.e. does not require additional; time consuming, which improves the speed of the device.

In this case, if the device is working on unloading, the initial weight is greater than the measured one and by the end of the measurement in the current weight counter there is a number equal to

 K + N - N 10 -, while trigger 9 retains its

At the end of

the initial measurement state of the signal from the control unit 15 pulses from the generator 11 pulses pass to the output of the ZI 12 circuit and then through the 2YPI 5 circuit to the input of the current weight counter 8, and through cxei iy 2 OR 6 to the net weight counter input. The process continues until the trigger 9 is set to one, i.e. until the input of the net weight and the current weight of N pulses to the inputs of the counters. The time spent on determining the net weight in the case of unloading is proportional to the net weight, i.e. less time. to determine the net weight in a known device.

The state of the trigger 9 at the time of the final measurement is remembered by the trigger 10, which is the trigger of the sign for the number in the weight counter.

12786064

that The presence of a sign trigger allows you to record a net weight number with a sign indicating the operation mode — loading or unloading. However, no additional switching is required to switch from one operation mode to another.

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Claims (2)

; The invention relates to weighing technology, in particular, to devices that automatically take into account the tare weight, and is intended for use in industry, mainly in automatic weighing and dosing systems. The aim of the invention is to improve speed while simplifying the device, as well as automating select the mode of operation. The drawing shows a structural diagram of the weighing device. The circuit contains a force-measuring sensor 1, an analog-to-digital converter 2, the first 3 and the second 4 match circuits, the first 5 and second 6 circuits 2ILI, the initial weight counter 7, the current weight counter 8, the first 9 and the second 10 D-flip-flops, generator 11 pulses, ZI 12 circuit, net weight counter 13 with recorder 14, control unit 15. The weighing device operates as follows. Before the goods to be weighed on the weighing device, the initial load on the sensor is measured in the scales or after the container reaches the metering position before the beginning of the metering. The signal from the force-measuring sensor 1 is converted by the analog-to-digital converter 2 to the digital sequence code Kd, which enters the current weight counter 8. At that time, a digital code T, in addition to the number in the current weight counter, is formed in the initial weight counter 7. 10 - R dream about where n is the number of decimal bits of the initial and current weights counter. The process of forming a number in count 7 of the initial weight is as follows. Before the beginning of the first measurement, in the initial weight counter 7, some arbitrary initial number N is found. Before the measurement by the signal from the control unit, the Initial state of the trigger 9 is set, the net weight counter 13, the analog-digital converter 2 are set to 7, the initial weight is recorded in the counter 8 of the current weight by the input inputs. During the measurement, the input code of the counter 8 from the output of the analog-digital converter, 2 receives the serial code NQ.B, the counter 8 forms the sum of two numbers N ,, + kN. If the sum is greater than 10, then the trigger 9 is set in the measurement process 11 | in 1, then through scheme 3 matches, scheme 2IL b and scheme 4 matches to the input of counter 7 receives a number equal to N - 10, which is subtracted from the contents of counter 7. In the counter 7 to the end of measurement there is a number equal to N - (N + N - U-) 10 - N .. If by the end of the measurement the trigger 9 is in O, then the current weight counter 8 is filled through the circuit ZI 12 and the circuit 2ILI 5 from the generator 1 impulses until the trigger 9 is set to state 1. In this case, the input of the counter 7 of the initial weight through the scheme 2IL b receives the same number of pulses as in the counter 8 to the current weight, which is 10 - (N + N). This number is added with the contents of the counter 7. As a result, the counter 7 has a number equal to N, + 10 - (N + NJ. We measure pa6otb of the counter 7 for addition or subtraction is determined by the state of the trigger. 9. The signal coming from the block The control input to the coincidence circuit 4 permits the formation of a number in the initial weight counter 7 only at the initial load measurement stage. After the end of this reference, the resolved signal is removed and the information in the initial weight counter 7 remains unchanged during the entire measurement time of this product. (or during the whole dosing time). The process of determining the net weight proceeds as follows. Before the measurement is started, the trigger unit 9 is set to the initial state, the net weight counter 13 and the analog-digital converter are measured by a signal from the control unit 15 2. With the same signal, the number from counter 7 of the initial weight is recorded according to the setup inputs to the counter 8 of the current weight. In the process of measurement, the code from analog-digital converter 2, corresponding to the measured load on the force measuring sensor 1, enters the current weight counter 8, where the number corresponding to the initial load on the force-measuring sensor 1 is added, then the current load the weight is the number N and is produced + K 10. The addition of 10 is N, the initial weight counter is reset, trigger 9 is set to one at the end of the measurement and not input to the input of the net weight counter. If the load on the sensor has increased, a number equal to where N | - the number corresponding to the increment of the load. As a result of adding 10+ N 10 - N + N, n-N, the trigger 9 is set to one, after which the number of pulses in the net weight counter 13 is equal to N;. net weight The process of determining the net weight occurs simultaneously with the measurement of the current weight, i.e. does not require additional; time consuming, which improves the speed of the device. In this case, if the device is working on unloading, the initial weight is greater than the measured one and by the end of the measurement in the current weight counter there is a number equal to K + N - N 10 -, while the trigger 9 retains its At the end of the initial measurement state According to the signal from control unit 15, pulses from the pulse generator 11 are passed to the output of the ZI 12 circuit and then through the 2YPI 5 circuit to the input of the current weight counter 8, and through cxeiiy 2 OR 6 to the net weight counter input. The process continues until the trigger 9 is set to one, i.e. until the moment when the net weight and the current weight of N pulses arrive at the inputs of the counters. The time spent on determining the net weight, in the case of unloading, is proportional to the net weight, i.e. less time. to determine the net weight in a known device. The state of the trigger 9 at the time of the final measurement is remembered by three germs 10, which is the trigger sign for the number in the weight counter no 064. The presence of a sign trigger allows you to record a net weight number with a sign indicating the mode of operation of loading or unloading. However, no additional switching is required to switch from one mode of operation to another. The invention The weighing device containing a load-measuring sensor with an analog-digital converter, the output of which is connected to the first input of the first coincidence circuit, a control unit connected to the first input of the second coincidence circuit, the output of which is connected to the second input of the initial weight counter, current weight counter, generator pulses, a net weight counter with a registration unit, differing from the fact that, in order to improve speed while simplifying the device, the first and second are entered into it D-flip-flops, first and second 2IL circuits, ZI circuit, the first input of the first 2PSH circuit connected to the output of the analog-digital converter connected to the first input of the first matching circuit, the second input of the first 2IL circuit and the first input of the second 21Sh circuit connected to the output circuit ZI, and the output of the first circuit. 2IL is connected to the input of the current weight counter, to the installation inputs of which signals are received from the installation outputs of the initial weight counter, while the second output of the control unit is connected to the R input of the first B-flip-flop and the inverter inputs of the net weight counter, analog-digital converter and counter the current weight, the clock input of the first D-flip-flop is connected to the output of the current meter, the weight, the single output of the first D-flip-flop is connected to the D-BXO of the second D-flip-flop, as well as to the first input of the initial weight counter and the second input first schema. a match connected to the second input of the second ORI circuit, the output of which is connected to the second input of the second coincidence circuit and to the input of a net weight counter, the zero input of the first D-flip-flop is connected to its same D-BXOdom and the first input of the ZI circuit, the second input of which clock input wto512786066 poro 0-trig ep8 is connected to the third pulse torus, and a single output by the control unit, the third input of the second D-trnger is connected to the register of the connection circuit 3 with the output of the generator.