SU1293479A1 - Device for measuring play of reading and toothed gearings - Google Patents

Abstract

The invention relates to mechanical engineering, namely to means of controlling gears. The purpose of the invention is to increase the measurement accuracy of the backlash by counting the number of pulses of the sensor of the high-speed link through the use of a controlled reversible pulse counter. The device is additionally equipped with a control unit 9 of the counter 7 pulses. When the high-speed and low-speed shafts of the monitored mechanism 3 rotate in one of the sides, the counter 7 counts the forward pulses. When rotated to the other side, the counter 7 records the number of pulses delivered by sensor 1 until the monitored mechanism 3 stops to select, and the result is given in the number of pulses of sensor 1 on the display of counter 7. The relative error of measurement of the dead stroke is 2%. 1 hp ff, 3 ill. "Sl with h & d 4i h

Description

The invention relates to mechanical engineering, namely to means of controlling gears.

The purpose of the invention is to improve the measurement accuracy of the backlash by counting the number of pulses of the sensor of the high-speed link during the backlash sampling time by using a controlled reversible pulse counter.

Fig. 1 shows a block diagram of a device for measuring the dead stroke of counting and gearing J in Fig. 2 - the same, of a pulse counter control unit; Fig. 3 is a device voltage chart.

The device for measuring the dead stroke of the reading and gearing gear includes pulse sensors 1 and 2 of the rotation angles of the high-speed and low-speed shafts of the monitored mechanism 3.5 drive motor 4 of the high-speed shaft with the control unit 5, load mechanism b of the low-speed shaft, pulse counter 7, speed sensor 8, the control unit 9 of the counter 7 pulses, the first input of which is connected to the output of the pulse sensor 2 of the low-speed shaft, the second input - to the output of the engine control unit 5 4, the first, second, third and fourth outputs - respectively with the first., second, third and fourth inputs of the pulse counter 7, and the speed meter 10, connected to the output of the speed sensor 8.

To clarify the operation of the device in FIG. 3, the following notation is adopted: 16 —signal of the engine control unit, 17 —stop signal of the engine control unit; 18 —signal Reverse run of the motor control unit 19 —signal of the pulse sensor of the high-speed shaft, 20 —signal of the impulse sensor of the low-speed shaft 21 — signal at the output of the threshold unit; 22 — a differentiated signal and a signal from the threshold block bounded above; 23 —differentiated and bounded from below signal of the threshold device; 24 -. signal inversion 22J 25 - total inverse signal from signals 23 and 24 26 - signal Subtracting the pulse counter control unit; 27 - signal Reset of the pulse counter control unit; 28 - Stop signal of the pulse counter control unit; 29 - Start signal of the pulse counter control unit; And - the dead course of the controlled mechanism; 4PU - threshold device error, -DK - error (angle) between the last front (or decay) of the threshold device and the position at which the output shaft of the monitored mechanism stops n-AK angle error between the first recession or the pulse front of the threshold device and the position at which the start of movement occurs

The control unit 9 by the counter of 7 pulses is made in the form of a threshold unit 11, the first input of which is the first input of the control unit 9, 40 of the output shaft controlled by the mechanical counter of pulses 7, the pulse former 12, the input of which is connected to the output of the threshold unit 11, the distributor 13 The first input of which is connected to the output of the forma-45 body 12, the first and second outputs, and the distributor 13 are the first and second outputs of the counter-7 control unit 9; the pulses, the control unit 14 of operating modes of the counter 7, t t kuschee time.

The device works as follows.

By pressing the Forward stroke button (not shown) of the engine control unit 5 includes the drive motor 4, the rotating high-speed shaft of the monitored mechanism 3- with the pulse sensor 50 in the forward direction, with

pulses, the input of which is the second input of the control unit 9 of the pulse counter 7, the first output is connected. It is connected to the second input of the distributor 13 pulses, the second output is the fourth output of the counter control unit 9, 7 pulses, the start circuit 15, the 7 pulse, the input of which is connected to the third output

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unit 14 controls the operation modes of the pulse counter 7, and the output is the third output of the counter control unit 9 pulses 7.

To clarify the operation of the device in FIG. 3, the following notation is adopted: 16 —signal of the engine control unit, 17 —stop signal of the engine control unit; 18 —signal Reverse run of the motor control unit 19 —signal of the pulse sensor of the high-speed shaft, 20 —signal of the impulse sensor of the low-speed shaft 21 — signal at the output of the threshold unit; 22 — a differentiated signal and a signal from the threshold block bounded above; 23 —differentiated and bounded from below signal of the threshold device; 24 -. signal inversion 22J 25 - total inverse signal from signals 23 and 24, 26 - signal Subtracting the pulse counter control unit; 27 - signal Reset of the pulse counter control unit; 28 - Stop signal of the pulse counter control unit; 29 - Start signal of the pulse counter control unit; And - the dead course of the controlled mechanism; 4PU - error of the threshold device, -DK - error (angle) between the last front (or decay) of the threshold device and the position at which the output shaft of the monitored mechanism stops n-AK angular error between the first recession or the front of the pulse of the threshold device and the position at which the start of movement occurs

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0 output shaft controlled fur- 5

controlled shaft output

nizma, t - current time.

The device works as follows.

40 output shaft controlled fur 45

By pressing the Forward stroke button (not shown) of the engine control unit 5. Lei 4 includes a drive motor 4, a rotating high-speed shaft of the controlled mechanism 3- with a pulse sensor 50 in the forward direction, with

By this, the counter control unit 9 of the impulses 7 generates an impulse Start (FIG. 3), including the counter 7, operating in the subtraction mode (sums 5 pulses with a minus sign). The low-speed shaft of the monitored mechanism 3 drives the sensor 2 which gives the signal sinusoidal form on the control unit 9 of the pulse counter 7 pulses, forming a sine-wave signal on the control unit 9 of the pulse counter 7 pulses, forming a square wave signal with a duty cycle 2 from the front and decay of which form short pulses through the decay Pulse limiter of counter 9 control unit of pulses to input Reset of pulse counter 7, after which the operator stops the drive motor 4 with the Stop button (not shown) on engine control block 5, engine 4 continues to rotate by inertia, and pulse counter 7 operates in the former mode, counting the pulses of sensor 1 and periodically resetting them O. Complete engine stop 4 occurs arbitrarily, regardless of the readings of the counter 7 pulses.

When the Backward stroke (not shown) button of engine control unit 4 is pressed, the signal from engine control unit 5 is fed to control unit 9 of pulse counter 7, switching counter 7 from the Subtraction mode to Summation mode, while pulses from sensor 1 are fed to counter 7 pulses and algebraically summed with the result there. The readings of counter 7 with the - sign decrease to zero and then increase with the + sign. On the display of the counter 7, the net value of the dead stroke of the monitored mechanism 3 is recorded, expressed in the divisions (pulses) of the sensor 1 of the high-speed link.

At the end of the dead stroke of the monitored mechanism 3, its low-speed shaft, which is connected to the sensor 2, begins to rotate, the signal of which is fed to the control unit 9 of the pulse counter 7 and formed is directed to the first input of the counter 7, stopping its operation.

At time t (fig. 3) by signal 16, the forward stroke includes the forward stroke of the drive motor 4. In this case, the block 9 controls the pulse counter 7 starts the counter 7 with the pulse 29 Start, operating in the Subtraction mode, and under the influence of the signal 26 ( subtraction). The counting of pulses in the counter 7 pulses is produced with the sign -. The imported engine 4 rotates the high-speed shaft of the monitored mechanism 3 and the sensor 1 is developed

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signal 19. Counter 7 counts the number of pulses in this signal.

The rotation of the low-speed shaft of the monitored mechanism 3 is transmitted to the sensor 2, generating a signal 20. Its frequency is i times smaller than the frequency of the signal of sensor 1 (i is the gear ratio of the monitored mechanism).

From the sensor signal 2, the threshold unit 11 forms a sequence of rectangular pulses 21, from each front and decay of which pulses are formed. 17 Reset, resetting 0 counts of pulses to O. I

When the operator presses the button

The stop signal 17 at the time t turns off the power to the engine 4. In the period from t to C, the rotation of the high-speed and low-speed shafts of the monitored mechanism 3 occurs by inertia, while the counter 7 operates as before. At time t, the front 2 of the signal 2 of the sensor 2 is formed before stopping the rotation or the decay of the pulse signal 21. Until the sensor 1 stops completely, the sensor 1 generates dK pulses that are detected by counting 7 and stored in its memory from t to tj. After a full stop of the high-speed shaft, the operator switches back. At the time of the reverse stroke, the counter control unit 9

7 translates the counter into the Summation mode by applying the zero level of signal 26. The signal 19 of sensor 1, the scale of which now rotates in the opposite direction, is formed in the mirror image, and in counter 7, the readings decrease due to algebraic summation with the previous result of -4K.

The 8th moment tg of the selection of the metered stroke of the controlled mechanism 3 begins

rotate the low-speed shaft and the sensor 2 generates a signal in the mirror image. Until the threshold unit 11 is triggered, the output shaft will turn in the opposite direction by the same angle that it turned in the period from tj to t. , and the sensor 2, connected through the kinematic chain of the controlled mechanism 3 to the low-speed shaft, will form + AK pulses. When the threshold unit 11 is in operation at time tj from the lower threshold, and at time t from the upper threshold, there is an error of 4pu of the threshold unit 11, but its value is negligible in view of the choice of the minimum loop. Hysteresis of the threshold unit 11. Ta-5 IMM, 4PU exceeds 0.0006-1, i.e. about 2%.

From the front of the pulse of the threshold unit 1 1 at time t (signal 21) by the counter control unit 9. 7 forms a 28 Stop signal that stops counting pulses. Subsequent stop pulses do not affect the state of counter 7. The counter of the low-speed shaft pulse sensor shows the second input with the output of the engine control unit, the first, second and third and fourth outputs, respectively, with the first, second, third and fourth inputs of the pulse counter, and a speed meter connected to the output of the speed sensor.

2. Device POP.1, characterized in that the pulse counter control unit is made in the form of a threshold unit, the first input of which is the first input of the unit

The result A is lit, which, if controlled by the pulse counter, is stored even after the engine stops before the start of a new measurement cycle. The signals 22, 23, 24, 25 illustrate the operation of the driver 12. These signals form the signals 17.

Claims (2)

1. A device for measuring the dead stroke of counting and gear transmissions, which contains pulse sensors for the angles of rotation of the high-speed and low-speed shafts of the monitored mechanism, the drive motor of the high-speed wave 20 thirty la with control unit, low-speed shaft loading mechanism, counter. 20 watches, the first and second outputs of the distributor are the first and second outputs of the counter control unit, the pulses, the pulse counter control unit, whose input is the second input of the pulse counter control unit, the first output is connected to the second input of the pulse distributor, the second output is The fourth output of the pulse counter control unit, the pulse counter start circuit, the input of which is connected to the third output of the pulse counter operating mode control unit, and the output is treimpulsov and speed sensor, characterized in that, in order to increase accuracy, it is provided with a control unit counter pulses 35 tim output control unit counters whose first input is connected to the pulse The yields com ,. the house of the pulse sensor of the low-speed shaft; the second input — with the output of the engine control unit; the first, second, third and fourth outputs, respectively, with the first, second, third and fourth impulse counter inputs, and a speed meter connected to the output of the speed sensor. 2. Device POP.1, characterized in that the pulse counter control unit is made in the form of a threshold unit, the first input of which is the first input of the unit pulse counter, pulse generator, the input of which is connected to the output of the threshold unit, pulse distributor, whose first input is connected to the output of the generator, the first and second outputs of the distributor are the first and second outputs of the counter control unit, pulses, pulse mode control unit whose input is the second input of the pulse counter control unit, the first output is connected to the second input of the pulse distributor, the second output is the fourth output Lok counter control pulses trigger the pulse counter circuit, whose input is connected to the third output of the control modes of the pulse counter, and the output is tre0 5 by the output of the pulse counter control unit. FIG. 2 I I I I "FtNwv Sitiv 1 H) N. v S V 3" NJ N "m" y "vJcJ  I 4-0 Compiled by B. Athos Editor M. Tovtin Tehred L. Serdyukova Proofreader I. Erdeyi Order 370/41 Circulation 678 Subscription VNIIPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4