SU147791A1 - Vibrograph to record vibrations using a handwriter - Google Patents

Description

Vibrographs are known, made with the use of a writing mechanism for fixing the amplitude of oscillations on the tape, driven by a spring and electric actuators. Such vibrographs do not provide for automatic operation of the vibrograph in the presence of vibrations and require springing or feeding for the drive.

The proposed vibrograph for recording vibrations by means of a recorder on a moving tape differs from the known ones in that it is made with a tape mechanism, whose automatic drive works by using the energy of the vibrations under study. For this, the EJ vibrograph uses a spring-loaded inertia mass, which perceives the oscillation energy, connected by means of levers to the ratchet device of the bevel gear.

FIG. 1 demonstration of the proposed vibrograph with an automatic drive of the tape mechanism; in fig. 2 - kinematic diagram of the vibrograph.

The proposed vibrograph has a tape drive mechanism that uses the energy of vibrations that the vibrator must register. The use of such a drive allows the rejection of any external sources of energy, as well as the need for charging the device on and off springs.

The vibrograph consists of a rigid body /, in which mass 5 oscillates on spring 2, recording vibrations on tape 4 moving along table 5 with its point. Other mass 6 oscillates on spring 7 and vibrates with its lever lever 8. It levers the system with the help of the straight tooth 9 and the reverse tooth 10 rotates the ratchet wheel 11. The ratchet wheel, through a bevel gear 12, transmits the rotation to the receiving coil 13 flax # 147791-- 2 of the traction mechanism. The pickup coil winds the tape from the charging coil 14. To record vibrations, the housing / device is rigidly fixed to the object so that the axes of the springs 5 and 7 coincide with the direction of vibrations. In the absence of oscillations, the masses 3 and 6 are at rest. In the presence of oscillations, mass 3 begins to oscillate on spring 2 and records on the tape, proportional to the amplitude of oscillations. At the same time, the mass 6, oscillating on the spring 7, oscillates the lever system 8. The lever system rotates the ratchet wheel // by an amount adjustable by screws 15 (see Fig. 2). In this way, the oscillatory movements of the mass 6 are converted into rotational movement of the ratchet, which is set in motion by means of a bevel gear 12, a pick-up roller 13 of a tape drive mechanism.

In the vibration laboratory of the department of hoisting-and-transport machines of the Ural Polytechnic Institute. S. M. Kirov was manufactured and tested a prototype of the proposed automatic vibrograph. Testing of the vibrograph was carried out on a shaker at various frequencies and amplitudes. Testing of the vibrograph showed that the tape mechanism works normally and the vibrograph automatically switches on, records the amplitude of vibration and turns off.

Subject invention

A vibrograph for recording vibrations using a handwriter on a moving tape, characterized in that, in order to realize the automatic drive of a tape-driving mechanism of a vibrograph using the energy of the same vibrations, the vibrograph uses a spring-loaded inertial mass connected by levers to a conical ratchet device transfer.

tk-k

Fig 1

ldll - l l l l. l l

VVVVV VVVVVVi:

 2

/ J