SU572641A1 - Device for measuring the width of strip material - Google Patents

Description

my Size in pochchev, made in the form of series-connected circuits AND 7, frequency divider 8, counter 9, and comparison circuit 10; a waste-rate limit detection unit 11, made in the form of a serially connected generator 12, a counter 13, a comparison circuit 14 and a serially connected OR circuit 15, a counter 16, a comparison circuit 17; block 18 settings, node 19 of the visual display.

The device works as follows.

In each of the sensors 1, 2, at the end of one revolution, the commands "start of subtraction and end of subtraction" are formed, which are fed to the display and control circuit 4.

By the command "start of subtraction generated by any of the sensors 1, 2, the measurement starts. During the time between the commands "start of subtraction and" end of subtraction, from the sensors to the counter 16 through the circuit OR 3, the indication control and measurement circuit 4, the circuit OR 15 and the counter 5 and circuit 7 through the circuit OR 3 and circuit 4 pulses equal to the number of information pulses emitted by the sensor per revolution. Counters 5 and 16 work in subtraction. The base setpoint is recorded in them from the setting block 18. The subtraction process lasts until the end of the measurement, i.e., until the end of the subtraction of sensors 1 and 2 arrives at circuit 4, after the measurement is completed, the information from counter 5 is transferred from the circuit 4 to visual display unit 19.

The generator 12 generates pulses, the repetition frequency of which is much higher than the frequency of information pulses received from sensors 1, 2.

The pulses from the generator 12 are fed to the counter 13 and through the circuit OR 15 to the counter 16. The pulses fed to the counter 13 are compared in circuit 14 to the tolerance set in block 18 of settings. Thus, the number of pulses equal to the tolerance value is deducted from the counter 16 during the generator operation, after which the generator operation is terminated by the prohibition signal from the comparison circuit 14. In the future, only information pulses from sensors 1 and 2 are subtracted from counter 16.

The impulses of the sensors go through the circuit OR 3, circuit 4 and circuit OR 15 to the counter 16 until the measurement is completed, i.e., until circuit 4 receives signals "end of the subtraction of sensors 1 and 2. The information is underestimated in the counter 16, it is compared in the comparison circuit 17 with the value of the nominal setpoints set in block 18.

The period of one measurement is equal to the time of one revolution of the disks of sensors 1 and 2. If during this period the circuit 17 does not work (equality does not occur), then on the display node 19 by a command from the circuit 4 the measurement result is displayed "reject-wide." When circuit 17 is triggered, arriving from its

output circuit And 7, the potential gives a permit. A passage for the passage of information pulses through the divider 8 to the counter 9, operating in the addition mode. In comparison diagram 10, the tolerance setting and the information in counter 9 are compared. If, at the end of the measurement, the comparison circuit 10 does not work, at node 19, by a command from the circuit 4, the result is “normal”, and when it is triggered, the result is “reject-narrow.

The measurement frequency is set at the setpoint block 18 and is measured by the circuit 4.

F o) m o l and inventions

20

Claims (3)

1. A device for measuring the width of a strip material containing sensors installed along the edges of the material being measured, an OR circuit, a setpoint block, a counter and an indication and measurement control circuit, the control inputs of which are directly, and the counting input through an OR circuit is connected to sensors, characterized in that, in order to increase the measurement accuracy, it is equipped with a detectable size detection unit in the tolerance field, the first input of which is connected to the output of the indication and measurement control circuit, the second input to the first output of the setting unit, and the output to the first control input of the indication and measurement control circuit, and the boundary determination unit "Reject-rate, the first input of which is connected to the output of the indication control circuit and measurement, the second input - with the second output of the setpoint block, and the output - with the second control input of the indication and measurement control circuit. 2. The device according to claim 1, characterized in that the block for determining the presence of a controlled size in the tolerance field is made in the form of a series-connected AND circuit, a frequency divider, a counter and a comparison circuit. 3. The device according to claim 1, characterized in that the block of defining the boundary of the marriage class is made in the form of a series-connected generator, counter, first comparison circuit and is connected in series the second OR circuit, the first input of the OR circuit is connected to the output of the generator, and the second input is connected to the output of the display and measurement control circuit. Sources of information taken into account in the examination 1. For the UK of UK number 1362319, cl. G 01B 11/04, 1974. 2. USSR author's certificate No. 393575, cl. G 01B 11/02, 1973.