SU1303843A1 - Device for measuring weight - Google Patents

Abstract

The invention relates to a weighing equipment and allows to increase the reliability of the device. At the end of the time interval during which the pulses are counted, the number corresponding to the initial load is recorded in the initial load counter 4 of the initial load. A measured load applied to the load-measuring sensor 1 causes a change in the frequency of the output pulses of the converter 2. The control unit 7 switches the switch 3 and the output pulses of the converter 2 are fed to the counter 5 of the total weight. Unit 6 compares the current information at the output of the total weight counter 5 with information about the initial load recorded in the counter 4. When the output signals are equal, the comparison unit 6 generates a pulse that sets the total weight counter 5 to zero. When the output signals are equal again in the total weight counter 5, the number corresponding to the measured load, which is indicated by the block 8, is recorded. 1 slug. S (L io o eo 4 ;;

Description

one

130 weight

This invention relates to a rhythmic technique.

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

The drawing shows a block diagram of the device.

The weighing device contains a load sensor 1, a frequency converter 2, a switch 3, an initial load counter 4, a total weight counter 5, a comparison unit 6, a control unit 7 and a display unit 8. Sensor 1 is connected to a frequency converter 2, the output of which is connected to the information input of switch 3. The control input of switch 3 is connected to the first output of control unit 7. One output of the switch 3 is connected to the counting input of the counter 4 of the initial load, and the other code is connected to the counting input of the counter -5 of the total weight. The output of the counter 4 is connected to one input of the comparison unit 6, and the output of the counter 5 to the other input of the comparison unit 6 and to the display 8. The second output of control unit 7 is connected to the control input of counter 4, and the third output is connected to the control input of counter 5. The output of comparison unit 6 is connected to the same input of counter 5.

The device works as follows.

Before measuring the initial load

K P is applied to the sensor 1, and the weight N 5 is written to the weight of 35, the corresponding frequency of the frequency converter 2 corresponds to the initial frequency F, corresponding to

the magnitude of the measured load-. , Ki R:

Fo

ROCK, K

I -r gr.o

where F is the frequency of the output pulses

frequency converter 2 when applying the initial load RD

initial load applied to force-measuring sensor 1;

coefficient of force-measuring sensor 1,. conversion factor of frequency converter 2 J frequency of output pulses of frequency converter 2 in the absence of initial load (at P 0) on the force-measuring sensor. The signal of the control unit 7 switches the switch 3, and the pulses

ROCK, K.

PR.0

jQ

2

frequency Fg with E output frequency converter 2 is fed to the counting input of the counter 4 initial load.

The time interval T, during which the pulses are counted, is aborted by control unit 7. Thus, at the end in the counter 4 initial load recorded number N, corresponding to the initial load P „:

NO FO

Attached to the load sensor 1 measured load P causes a corresponding change in the frequency of the output pulses of the converter 2:

0

Bb (j

TO,()

+ P „

iip.o switches comm5

0

The control unit 7 controls 3, and the output pulses of the frequency converter 2 are fed to the input of the total weight counter 5. The comparison unit 6 compares the current information at the output of the counter 5 with information about the initial load N recorded in the counter 4. When the output signals of the initial load counter 4 and the total weight 5 are equal for the first time, the comparison unit 6 generates a pulse that sets the total weight counter to zero. When the output signals of the counters are equal again, a pulse is not generated at the output of the comparison circuit, and the total

5 weights 5 we write the number N, corresponding to

0

five

its value of the measured load-. , Ki R:

N zyh-Tizts-, -K,.

The number N is indicated by the display unit 8. Similarly, the value 4 of the load that can be compensated for when measuring the payload can be recorded in the initial load counter 4.

Claims (1)

Invention Formula A weighing device, jQ holding a load-measuring sensor connected to the input of the frequency converter, initial load and total weight counters, and control and display units, characterized in that, in order to increase reliability, a switch is inserted into it, the information input of which is connected to the frequency output converter, control input - to per 3 13038 i34 control unit, and the high-voltage inputs of which are connected switch moves are connected to the counting-to the outputs of the counters the initial load inputs of the counters initial on-.ki and the total weight loads and total weight; to the controlling control input of the counter whose rounding is connected to the corresponding weight, the control unit and control unit, and the comparison, information unit are connected to the output of the second and third outputs of the block.