SU1397713A1 - Device for measuring diameters of large-size articles - Google Patents

Description

139

The pulse from the part 9 speed sensor trigger 10 will change its state to the opposite. At the same time, counters 3 and 5 are allowed to count. The next pulse from the angle converter 2 changes the state of the first counter 3 by one, overwrites the contents of the third counter 5 into the first buffer register 7, and resets the third counter 5,

13

the completion of the complete rotation of the part from the sensor 9, the number of revolutions of the part will receive a new impulse, which will transfer trigger 10 to its original position and prohibit counting by counters 3 and Upon filling pulse counters 3,5,6 and buffer registers 7 and 8, diameter calculator 11 calculates the required diameter. 1il

one

The invention relates to an instrumentation technique and can be used in machine building when measuring the diameters of shafts and holes in the course of processing them on metalworking machines, for example, 3 power machines for actively controlling the diameters of large-sized body parts.

The purpose of the invention is to improve the accuracy of measurement of large parts by reducing the error from the instability of the linear speed of rotation of the part.

The drawing shows a block diagram of the device.

The device comprises a measuring roller 1 associated with a rotation converter 2, made, for example, in the form of a sensor for the rotation speed of the measuring roller 1 and connected to the information input of the first counter of 3 pulses. The 4 clock pulse generator is connected to the information inputs of the third 5 and second 6 pulse counters, the outputs of which are connected to the first 7 and second 8 buffer registers, respectively. The sensor 9 of the number of revolutions of the part is connected to trigger 10, the first output of which is connected to the first control inputs of the first 3 and third 5 pulse counters, and the second output is connected to the control input of the second counter 6 pulses. The control inputs of the first 7 and second 8 buffer registers and the second control inputs of the second 6 and third 5 pulse counters are connected to the converter 2 of the angle of rotation (delay lines and

pulse shapers not shown). The outputs of the counters 3, 5 and 6 and the buffer registers 7 and 8 are also connected to the diameter calculator 11.

The device works as follows.

In the initial state, trigger 10 enables the counter to count 6 pulses and prohibits counting from the counters 3 and 5 pulses from the generator 4 clock pulses. The measuring roller is brought into contact With a rotating part (not shown) and pulses from the transducer 2 of the angle of rotation, generating, for example, one pulse for one turn of roller 1, are fed to the second control unit: the second input of the second counter 6 and the control input the second buffer register 8, while overwriting the contents of the second counter 6 into the second buffer register 8 and resetting the second counter 65 Thus, the state N; The second buffer register 8 is determined by the time for a complete rotation of the measuring roller 1, which precedes the current full rotation of the roller:

J. dp V t

N.

(one)

where .d is the diameter of the roller;

oscillator signal period

one

35

40

 4 clock pulses; linear speed of rotation of the measuring roller 1 at a given time. Upon the arrival of a pulse from the part rotation speed sensor 9, the trigger 10 changes its state to the opposite, thereby prohibiting the second counter 6 from being counted and overwritten in the second buffer register 8. The number of pulses recorded in the second counter 6 ,. equally

N

Si

g

7

Vz t

where S is the distance traveled by the measuring roller from the moment of issuing its own pulse to the arrival of a pulse from the sensor 9 of the number of revolutions of the part;

V2 - linear velocity at a given time.

At the same time, counters 3 and 5 are allowed to count. The next pulse from the angle converter 2 changes the state of the first counter 3 by one, overwrites the contents of the third counter 5 into the first buffer register 7 and zeroes the counter 5, When a new pulse arrives. rotation processes in counters 3 and 5 and the first buffer register 7 are repeated. Upon completion of the complete rotation of the part from the rotation speed sensor 9, a new impulse is received, which flips trigger 10 to the initial position and prohibits counting by counters 3 and 5. Recorded first

lo pulses NJ

counter 3, corresponds to the number of full revolutions of the measuring roller 2 during the complete revolution of the part. The number of pulses Ni, recorded by the third counter 5, is equal to

S2.

Va

where S is the path traveled by the roller 1 from the moment of issuing the last own pulse until the pulse arrives from the sensor 9 of the number of revolutions of the part; V - linear velocity at the given

moment of time.

The number of pulses Nj- recorded in the first buffer register 7 corresponds to the time of the last full rotation of the measuring roller 1 within the limits of the turnover of the part:

N.

(four)

  V. t / On filling the counters of 3, 5 and 6 pulses and buffer registers 7 and 8, Order 2597/37

(link not shown) The diameter calculator 11 calculates the required diameter using the formula

.

D d

P (N.- l

.)

N Nj

(five)

1Q, subject to equality of speeds:

V-,

V, and

Vi

V /,

15

20

25

thirty

35

40

45

50

55

Claims (1)

Invention Formula A device for measuring the diameters of large-sized products, comprising a measuring roller with a rotation angle transducer, a first pulse counter, a part rotation speed sensor, a second and third pulse counters, a pulse generator connected to the information inputs of the second and third pulse counters, the first buffer register connected to the output of the third pulse counter, a trigger connected by a chBB input to the sensor of the number of revolutions of the part, the first output to the first control inputs of the first and third about pulse counters, rotation angle converter connected to the information input of the first pulse counter, second control input of the third pulse counter and control input of the first buffer register, diameter calculator, first input of which is connected to the output of the first pulse counter, second input to the third output pulse counter, the third input to the output of the first buffer register, characterized in that, in order to increase the measurement accuracy, it is provided with a second buffer register connected to the output The second pulse counter, the first control input of which is connected to the second output of the trigger, the second control input of the second pulse counter and the control input of the second buffer register are connected to the rotation angle converter, the output of the second pulse counter is connected to the fourth input of the diameter calculator, the output of the second buffer register connected to the p input of the diameter calculator. Circulation 680 Subscription