SU559183A1 - Acceleration sensor - Google Patents

Description

one

The invention relates to the field of measurement technology and can be used in inertial navigation and control systems.

Acceleration sensors are known that contain at least one pair of strings, each of which is connected at one end to the sensor body and the other to an elastic element, inside which a liquid inertial mass is placed, each of the strings is equipped with an excitation and pickup element of the 1J 2 oscillation signal. Inertial masses reduce the mutual influence of string vibrations, and the associated capture effect, but complicates the design of the sensor.

The closest in technical essence is a sensor containing at least one pair of strings, each of which is connected at one end to the sensor body, the other to the total inertial mass and is equipped with elements of excitation and signal removal з.

These sensors to get the maximum possible (yy) i strings and

The maximum measured acceleration) sensitivity is provided with a large inertial mass, which largely determines their large weight. The disadvantage of the last of the indicated i sensors, in addition, is the presence of a wide insensitivity zone caused by the capture phenomenon, determined by the mutual influence of string vibrations, which reduces the measurement accuracy.

The purpose of the invention is to reduce the weight of the sensor and increase its sensitivity.

This is achieved by the fact that the sensor is provided with a lever that is movably fixed in the case, the long arm of which is connected to the inertial mass, and the short arm to the strings, the directions of oscillations of which are mutually perpendicular to ph.

In order to reduce the mutual influence of vibrations of the strings, the excitation of the string is produced in two mutually perpendicular planes.

Claims (3)

The drawing shows a general view of a string acceleration sensor. The inertia mass of the I sensor is fixed on the long arm of the type 2 beam 2, elastically connected to the sensor case (the link of the lever with the case can be articulated), and the strings 3 are connected with the short lever arm. The excitation element 4 and the element 5 for picking up the oscillation signal of one string are located relative to the corresponding elements of the other string in a mutually perpendicular direction4. The lever in the place of elastic connection with the body has a relatively large width. The stiffness of the elastic connection of the lever with the Mala case in comparison with the stiffness of the strings in the direction of their length. The electric part of the string accelerometers is known and is not shown in the drawing. The operation of the sensor differs from the operation of the known string acceleration sensors in that the force of the inertial mass 1 is transmitted to the strings 3 not directly, but through the lever 2, while increasing by the number of times determined by the ratio of the lengths of the long and short arms of the lever, and by the fact that The strings occur in mutually perpendicular-curved directions. Sensor strings may have not only a circular or square cross section, but also such when the main dimensions of the cross section are not the same, for example, elliptical, rectangular. Using a lever elastically connected to the base, the inertial mass is attached to the long arm, and the short strings are attached to em, while maintaining the sensitivity of the inertial mass, reduced by a number of times, determined by the ratio of the length of the long and short arms of the lever, which reduces the weight of the sensor, or allows you to increase the sensitivity pheno- sensor into the same number of times without increasing the inertial mass of relatively large width of the lever at the point of the resilient connection with the housing eliminates a stirred inertial mass in any of the transverse iapravleny administration and the need for special vkonstruktsiyu dagchnk radial supporting device vvertsiovshA weight. Claims of Inventions Acceleration sensor, containing iirshuyu mass suspended in the body with strings, equipped with elements of excitation and pickup of the oscillation signal, characterized in that, in order to reduce weight and increase sensitivity, the sensor is equipped with a movably mounted in the body lever, the long arm of which is connected to inertial mass, and short with strings, the directions of oscillations of which are mutually perpendicular. Sources of information taken during the examination: 1.Avt. St. No. 363037, M.C. Q O1 P 15 / 1O, 1971.2 2. Avt. St. No. 410317, M.C. G, 01 P 15/08, 1972. 3. Gorenstein I.A. and others. Inertial navigation systems. M., 197O, p. 1010 (prototype). i 5 V ff