SU1691887A1 - A tape carrier strain gauge - Google Patents

Abstract

The invention relates to a measurement technique, namely, devices for measuring the deformation of a tape carrier, and makes it possible to improve the measurement accuracy by increasing the resolution. The device contains a scanning reproducing element, coupled with a tape carrier, an amplifier-former connected to a trigger, the output of which is connected to the time interval converter in the code and through a delay element to two registers, a adder (connected to the New indicator in the device). the introduction of a position sensor connected to the driver-amplifier of a permanent storage device connected via the first register to the input of the second register. The marking symbol is made in ide two parallel magnetization lines arranged across the carrier tape and reproducing the scanner element is a rotating magnetic head. 1 ZP f ly-2-yl. with SP

Description

The invention relates to a measurement technique, in particular, to devices for measuring the deformation of a tape carrier.

The aim of the invention is to improve the accuracy of measuring the deformation of the tape carrier by increasing the resolution.

FIG. 1 shows a block diagram of the device; FIG. 2 is a marking symbol with additional constructions.

A device for measuring the deformation of a tape carrier contains a scanning reproducing element 1, conjugated with a tape carrier 2, connected by a output through the amplifier-generator 3 pulses to the counting input of the trigger 4 L of the personal frequency equalizer 5

connected by an output through an amplifier forcing 6 pulses with a zeroing input of flip-flop 4, the output of which is connected through a delay element 7 to control inputs of registers 8 and 9 and through serially connected time interval converter code (PIC) 10 and read-only memory (ROM) 11 to the information input of the register 8, the output of which is connected to the first input of the adder 12 and the information input of the register 9, the output of which is connected to the second input of the adder, the output of the latter is connected to the information input indicator 13.

A device for measuring tape deformation is as follows.

ABOUT

Ltd

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VI

The scanning reproducing element 1, which is a rotating magnetic head, reads the marking symbol circumferentially. With the passage of the scanning reproducing element 1 above the position sensor 5, which is located at the lowest lower point of the circle, a pulse is generated at the output of the latter, which will reset trigger 4 at the back front, thereby preparing it for operation. With one rotation of the scanning reproducing element 1 n. From the output of the amplifier-former 3, a series of four reproduced pulses are sent to the counting input of the trigger 4. The first pulse sets the trigger 4 to one, the second will reset it. At the same time, at the output of trigger 4, a pulse is formed, the duration TI of which corresponds to the time between the reproduced pulses of the first line of the marking symbol. The third and fourth reproduced pulses will also form at the output of trigger 4 a pulse of duration T2, corresponding to the time between the reproduced pulses of the second line of the marking symbol.

The reference value a, characterizing the presence of longitudinal deformation, is determined by fig. 2,

a (OFMOE),

where (OF) and (OE) are determined from LAVO and ADS triangles.

(OF) R cos -2 Ti and (OE) R cos r2,

where R is the radius of the circle described by scanning reproducing element 1;

(o - angular velocity of rotation of the scanning reproducing element 1;

P and Ha - the duration between the reproduced pulses, respectively, of the first and second line marking symbols.

As a result, we obtain that

 cos -k ri + R cos -n Yg,

PIC 10 converts the pulse durations from trigger 4 to ROM 11, where the function values are pre-recorded

f (x) R cos -n x, there will be a digital code that is addressable for ROM 11, i.e. X value. On the falling edge of the pulse from trigger 4. The delayed delay delay element 7 for the time required for operation of the PIC 10 and ROM 11 will record the result from ROM 11 to the first register 8. When converting the second pulse with output of a trigger 4, duration Ta

the process will happen in a similar way. This will shift the information in registers 8 and 9, resulting in the register

9 will be the result of R cos -n x, and in

Register 8 - R cos G2. The adder 12 will make the addition of these values and on the leading edge of the pulse from the sensor 5 position indicator 13 will display the result of calculations cos -n t + R cos -n t

The main advantage of the proposed technical solution is a higher measurement accuracy due to an increase in resolution due to the high scanning speed of the reproducing element and the ability to measure the amount of deformation in one scanning cycle. In addition, this device has a simpler hardware implementation, since it does not require the use of bulky cathode ray tubes with high-voltage power supply devices, scanners and control units.

Formula of the invention 1. A device for measuring tape deformation, comprising a scanning reproducing element, coupled with a tape carrier made with a marking symbol recorded on it, connected by an output to an input of a pulse-shaping amplifier, connected by an output with an input of a time interval converter in the code and through the delay element with the control inputs of the first and second registers, the adder connected by the output to the information input of the indicator, characterized in that, To improve measurement accuracy by increasing the resolution, a serially connected position sensor and a second amplifier driver and a persistent storage device are inserted into the device, the output of the second driver of the driver is connected to the control input of the indicator and the inverter trigger input, the counting input of which is connected to the output of the first pulse shaping amplifier, while the output of the time interval to code converter is connected via a persistent storage device with information the main input of the first register, the output of which is connected to the first input of the adder and the information input of the second register, the output of which is connected to the second input of the adder.

2. The device according to claim 1, characterized in that the marking symbol is two parallel lines of magnetization located across

g

the tape carrier, and the scanning reproducing element is designed as a rotating magnetic head.

1.

3W.

Claims (2)

Claim 1. A device for measuring the deformation of a tape medium, containing a scanning reproducing element, paired with a tape medium, made with a marking symbol recorded on it, connected to the input of the amplifier-pulse former, a trigger connected to the output from the input of the time interval converter to the code and through the element delays with control inputs of the first and second registers, an adder connected by an output to the information input of the indicator, characterized in that, in order to improve the accuracy and measurements by increasing resolution, a position sensor and a second driver amplifier and a read-only memory are inserted in series with the output of the second driver amplifier connected to the control input of the indicator and the zeroing input of the trigger, the counting input of which is connected to the output of the first amplifier-driver wherein the output of the time slot to code converter is connected via a read-only memory to the information input of the first reg Stra, whose output is connected to the first input of the adder and the data input of the second register, whose output is connected to the second input of the adder. 2, The device according to π. 1, characterized in that the marking symbol is two parallel lines of magnetization. located across the tape carrier, and the scanning reproducing element is made in the form of a rotating magnetic head. Fig. {. Figure 2.