SU1516746A1 - Rheostat transducer of linear movements - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to improve the accuracy of control of a rheostatic linear displacement transducer by correcting the influence of the distortions of the control object. The rheostatic linear displacement transducer comprises a rotary base 1, on which a winding 3 is placed, having a flat portion 4, and a contact plate mounted on an additional base 8 connected to the slider 5 and rotatably mounted about an axis 7. The additional base 8 is connected the object of control with the help of a pair of parallel t g 10. When the object is linearly moved, the electrical resistance of the winding 3 between its end and the contact plate is uniquely associated with this movement. When the object 9 is skewed, the additional base 8 also rotates accordingly, which leads to a change in the number of contacting elements of the flat section 4 of the resistive winding 3. The change in the total electrical resistance of this winding is a measure of the angular skew of the test object, which can be used to make corrections to the measurement results . 2 Il.

Description

ate

S

Sj

105

power of a pair of parallel t g 10. When the object moves linearly, the electrical resistance of the winding 3 between its end and the contact plate is uniquely associated with this movement. When the object 9 is skewed, the additional base 8 also rotates accordingly, which leads to a change in the number of contacting elements of the flat section 4 of the resistive winding 3. The change in the total electrical resistance of this winding is a measure of the angular skew of the test object, which can be used to make corrections to the measurement results . 2 Il.

The invention relates to a differential technique and can be used to control linear movements of objects in various fields of science and technology.

The purpose of the invention is to increase the control point due to the correction of the influence of the angular displacements (distortions) of the control object on the transducer readings,

Figure 1 shows a rheostatic linear displacement transducer, general view; Fig. 2 is a diagram illustrating changes in resistance between the beginning and the end of the converter winding when the controlled object is skewed.

The rheostatic linear displacement transducer contains a rotary base 1, on which a cylindrical frame 2 of electrically insulating material is installed with a winding 3 having a flat section formed by grinding. The slider 5 with the contact plate, whose width is equal to the length of the frame 2, is mounted with the possibility of movement in the rectilinear guides 6. On the slider 5 the additional base 8 is fixed with the possibility of rotation about the axis 7, which is connected in the measurement process with the object being controlled 9 by means of a pair of parallel pipes t 10 pivotally connected to it. T g 10 are located in a plane parallel to the plane of rotation of the additional base 8. On this basis, a contact is fixed, on the slider plate 5 (in Fig. 1 it is conventionally aligned with g additionally base 8) cooperating with the flat portion of the resistive winding occurs 3 ki transducer.

Rheostatic linear displacement transducer works as follows.

Prior to the inspection, the swivel base 1 is set at a certain angle of to the rectilinear rails 6, providing the required sensitivity of the control. While ensuring maximum sensitivity, this angle is about (is 88-89 °. At 10 g, the transducer communicates with control object 9. If during control the object 9 moves only linearly, then the electrical resistance of the winding section 3 between its one end and the slider contact plate 5 will unambiguously be associated with the magnitude of the movement being controlled. When the control object 9 is angularly deflected, the additional base 8 is rotated by an angle (i, which causes the contact plate (its new position in figure 2) indicated by a dotted line) begins to shunt a greater number of turns of the flat section 4 of the winding 3. The magnitude of the electrical resistance between the end of the winding 3 and the contact plate also changes, which characterizes the magnitude of the measurement error. To account for this error, the relationship between the total electrical resistance of the resistive winding 3 and the angles / j of the skew of the object 9. At the same time, controlling the total resistance of the winding 3 and the electrical resistance between the end th winding and the contact plate, it is possible to obtain complete information about the linear and angular movement of the object and thereby improve the accuracy of linear motion control.

Claims (1)

Invention Formula Rheostat linear motion transducer containing turn51 a base mounted on it a cylindrical frame with a winding having a flat portion and mounted on a rectilinear slider with a contact plate whose width is equal to the length of the frame, characterized in that, in order to improve the accuracy by correcting the effect of the angular displacements o6 : object, it is provided with an additional the base fixed on the slider can be rotated, and connected in the measurement process with the object being monitored a pair of parallel tg, hinged to an additional base and located in a plane parallel to the plane of rotation of this base, and the contact plate is fixed on an additional base. 0US.Z