SU1580186A1 - Apparatus for measuring energy of impact - Google Patents

Abstract

The invention relates to a measurement technique and makes it possible to increase the accuracy of measuring the impact energy of a shock-pulse wrench. The rotary impulse impulse wrenches act on a power receiver consisting of a flywheel, on whose shaft a torque sensor and an angular position sensor are mounted. The sensor signals are received in the information and computing unit. When the control button is pressed, the time of turning the handwheel by 1 ° is measured, the measurement result is recorded in the first pulse counter. After applying the measurable impact, the time for turning the flywheel by 1 ° is again measured, which is recorded in the second pulse counter. The outputs of the pulse counters are connected to the information inputs of the computing device, which by the measured values calculates the impact energy. 2 Il.

Description

The invention relates to a measurement technique and can be used to measure the impact energy of shock-pulse nutrunners.

The purpose of the invention is to improve the accuracy of measurement of the impact energy,

FIG. 1 shows a functional diagram of a device for measuring impact energy; in fig. 2 - timing diagrams for the device operation

The device for measuring the impact energy contains a dilovapriating device 1, made in the form of a flywheel 2 mounted in the housing 3 on bearings 4, of an angular position sensor 5 placed on the shaft 6

the flywheel 2, the shank 7 and the torque sensor 8, and the information and computing unit 9, which contains the generator 10 pulses, the first element 11, the output connected to the counting input of the first counter 12 pulses, and the first input to the output of the first trigger 13, the second element And 14, output connected to the counting input of the second counter 15 pulses, and the first input to the output of the second trigger 16, amplifier 17, connected to the output of the torque sensor 8, and output to the installation S-input of the third trigger 18, connected to D-entry fourth trigger 19, the output connected to vtoryzd

00

00 SE

The inputs of the elements 11 and 14 and the installation R-input of the third trigger 18, the output of the fifth trigger 20 are connected to the D-input of the first trigger 13 by the output connected to the D-input of the second trigger 16 and the installation R-in the trigger 20, the installation S-input through the control button 21 connected to the bus Voltage of the logical unit, the clock inputs of the first and second trigger 13 and 16 are connected to the output of the amplifier 17, the clock input of the fourth trigger 19 is connected to the output of the angle sensor 5, the output of the generator 10 impulses connected to the third in and am elements 11 and 14, account information outputs tors 12 and 15 pulses are connected to data inputs of the calculation unit 22 through the pulse shaper 23, the output of the second flip-flop 16 is connected to the control input of the calculation unit 22, and data outputs of the computing device connected to an indicator 240

A device for measuring impact energy works as follows.

The impact wrench 25 is connected to the shank 7 of the power take-up device 1, and the wrench and the computational unit 9, previously set to its initial state (not specified), are turned on.

The wrench begins to create shock-rotational pulses that, through the torque sensor 8, act on the flywheel 2, drive it into rotation. At the output of the torque sensor 8, short pulses appear, the duration of which is determined by the impact duration and is 10-50 microns / sec. and the repetition frequency is determined by the repetition frequency of the shock-rotational impulses of the wrench and is 10-40 Hz. As the flywheel 2 began to rotate, pulses appeared at the output of the sensor 5 of the angular position, and turning the flywheel by one degree corresponds to one pulse at the outlet of the sensor 5 of the angular position

After pressing the control button 21, the trigger 20 is set to one state, at its output a voltage of logical one

0

five

0

five

0

five

0

five

0

which enters the D-input of the first trigger 13.

When a impact wrench is applied, a pulse appears at the output of the torque sensor 8, with which the triggers 13 and 18 are set to one. In this case, the voltage of the logical unit from the output of the trigger 18 is supplied to the 15th input (trigger 19. The pulse from the output of the angle sensor 5, the trigger 19 is set to the single state, its output is the voltage of the logical unit, which the trigger I zero state. From the output of the trigger 19, the voltage of the logical unit goes the same way to the inputs of the elements 11 and 14, and the matching condition for the element 11 begins to perform, since the trigger 13 is in the single state, and at its output are momentum The output of the generator 10, whose frequency is stable and equal to 100 kHz, comes from the output of the element 11 and the generator 10 pulses arrive at the counting input of the counter 12 pulses, which begins to fill with them

When the next pulse arrives from the output of the sensor 5 of the angular position, the trigger 19 is set to the zero state, since the trigger 18 is in the zero state, the coincidence condition for the And 11 element stops fulfilling. The counting of the pulses of the generator 10 by the counter 12 ends, and the counter 12 goes into the information storage mode.

When the next impact is applied with a wrench, the triggers 16 and 18 are set to one, and the trigger 13 is set to zero. The pulse from the output of the angle sensor 5, the trigger 19 is set to one state, the matching condition for the element 14 begins to be met and the counter 15 is filled with the pulses of the generator 10.

When the flywheel is rotated by 1 ° at the output of the angular position sensor 5, an impulse appears and the trigger 19 returns to the initial zero state, the coincidence condition for the And element 14 stops fulfilling and the counter 15 switches to the information storage mode.

Thus, counters 12 and 15 recorded the number of pulses proportional to the turning time

The flywheel shaft is 1 °, which is inversely proportional to the angular velocity of the flywheel. Moreover, the number of pulses in the counter 12 is inversely proportional to the angular velocity of the flywheel before the impact, the energy of which is to be measured, and in the counter 15 - inversely proportional to the angular speed after - the measured impact.

From the outputs of the pulse counters, information arrives at the inputs of the computing device 220. After the next strike is struck by the pulse-pulse wrench, the trigger 16 returns to the initial zero state and from the trailing edge of the pulse at its output the driver 23 generates a pulse arriving at the control input of the computing device, on which the computing device reads the information of the counters 12 and 15, calculates the impact energy and the result of the calculations displays on the indicator 24.

The measurement process is terminated and the wrench is disconnected from the supply network.

Claims (1)

Invention Formula A device for measuring impact energy, containing a power receiver, made in the form of a flywheel mounted in a housing on bearings, an angular position sensor placed on the flywheel shaft, a shank and a computing unit containing a pulse generator, the first element And output connected to the counting input the first pulse counter, and the first input to the output of the first trigger, the second 866 And, the output connected to the counting input of the second pulse counter, and the first input to the output of the second trigger, and the indicator, which, in order to improve the accuracy of measuring the impact energy, is equipped with a torque sensor mounted on the shaft flywheel and associated with the shank, and information and computing unit is equipped with an amplifier, third, fourth and fifth triggers, pulse shaper, computing unit and control button, the output of the torque sensor through the amplifier is connected to The S-input of the third trigger, whose output is connected to the D input of the fourth trigger, the output of which is connected to the second inputs of the AND elements and the installation R input of the third trigger, the output of the fifth trigger is connected to the D input of the first trigger whose output is connected to the D input of the second trigger and the installation R input of the fifth trigger, which is connected to the bus voltage of a logical unit through the control button via the control button, the clock inputs of the first and second triggers are connected to the amplifier output; the clock input is four that trigger is connected to the output of the angle sensor, and the output of the pulse generator is connected to the third inputs of the elements AND, the information outputs of the pulse counters are connected to the information inputs of the computing unit, the output of the second trigger through the pulse shaper is connected to the control input of the computing unit whose information outputs are connected to the indicator . J 8 I 4 g 5