LT5925B - Adjustment device for optical and geodesic instruments - Google Patents

Abstract

The proposed invention is based on the fact that an adjustment disk of a device with strong links connected to bottom of gadget is adjustable both horizontally and radially in the direction of the measurement axis of the device within two concentric radial and levelling microfeeds installed in two locations with respect of a disc. Optical and geodesic instruments adjustment table has two pairs of adjustment mechanisms mounted concentrically in two axes located at not less than 90° from each other. On the opposite part of the disc is built third rest - an unregulated ball. Turning adjustment machine screw, it moves to its axis and cone nozzle pushes a disk through a spherical piece up or down according to demand. Spring supports tightness and holds disk housed with adjustment mechanism. Adjusting feed mechanisms are mounted concentrically in two table positions. The operator can turn cogs and a cam adjustment can perform from two positions.

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to the field of measuring techniques and technology for performing the rectification operations of optical and geodetic measuring devices prior to precision measurements. Positioning devices are used in many technical fields to help improve the positioning accuracy of the devices. Using justification devices, the devices are flattened and centered. Also, justification devices help to position the devices in the required direction or to raise the object to be measured.

The proposed device can be used for measuring the accuracy of the angular position of circular scales mounted on measuring devices (tachometers, machine rotary tables, etc.).

State of the art

Justification devices are used to improve the positioning of the devices. Usually these justification devices center and level optical and geodetic devices. Currently, justification devices are used in many optical and geodetic devices. There are companies specializing in the manufacture of various adjusting and positioning devices such as Standa, Thorlabs Quantum Electronics (www.thorlabs.com), Leitz, Leica and some other Lithuanian and foreign firms. Adjusters are usually manufactured with adjustable degrees of freedom of 2, 3 or more, manual and actuated.

Prototype of Invention - Invention Coordinate Table, SU No 973290, Cl. B 23 Q 1/06. The table consists of a base, a carriage, a disk, two pairs of perpendicular resilient elements connecting the disk to the base. The distinctive feature of the table is that the elastic members are connected to the carriage at one end, and the elastic members have two brackets which are fitted with feed mechanisms.

The coordinate table is small in size and sensitive to adjustment shifts. The main disadvantage of the table design is that it is designed to control only two-way displacement in one plane. The horizontal plane of the disk plane is not adjustable by this design. This presents the inconvenience of testing the functionality of many optical and other types of measuring instruments, which require the position of the object to be aligned with the center of the measuring axis before the measurements are made.

Project "Development and Investigation of Nanometric Resolution Mechatronic Devices for Angle Measurement Systems Accuracy (GonoTest)", no. 1623-MA / 59, planned to create a highly accurate five degree freedom table with a rotating platform. To this end, in 2008, a centering and leveling table for the calibration of angular bar scales was designed on the basis of a precision rolling bearing. Also designed, manufactured and installed table rotary piezoelectric actuator, its experimental research. Precision piezoelectric electromagnetic actuators for centering and leveling table are designed, their control algorithms are created. The main disadvantages of this table are:

1. The main element is a spherical bearing (bearing inner rolling) track, which is difficult to make and adapt from existing standard bearings

2. During one adjustment movement, the other subject position changes as well. For example, centering changes landscape orientation and vice versa. The straightening operation becomes time-consuming and complicated, finding a position where both adjusting positions will take the required precise horizontal and centering positions.

The essence of the invention

The present invention is based on the fact that the sensing disk of the device, which is tightly connected to the base of the device, is adjustable horizontally and radially with respect to the axis of the device measured by two concentric radial and lying micro-displacements mounted in two locations. It is proposed to use a justification device having the above-mentioned properties for positioning the device at the level and direction of the object being measured. In addition, the present invention relates to a centering device for aligning and lying horizontally on a measuring device.

The advantage of the proposed device is that the significantly simplified construction of the justification devices used so far allows to simplify the entire justification procedure due to the operator effect on the rectification microplate screws in two fixed positions. These key features make it possible to achieve greater accuracy in justification.

Due to its small size, the present invention may be portable.

Description of Embodiment of the Invention

The instrument must be precisely centered and level before accurate measurements can be made. Various positioning devices are used to ensure the highest accuracy of measurements.

The proposed optical and geodetic device rectification device, due to its simplified construction, facilitates the rectification procedure and due to its small dimensions it is portable.

The structure of the dressing table is shown in Fig. 1 and Fig. 2.

Fig. 1 is an overall perspective view of the table

Fig. Figure 2 shows an axial section of the rectification table.

Optical and geodetic device alignment device consists of the following parts: 1 - base, 2 microplate sleeve, 3 - lying push screw, 4 - centering push cam, 5, 7 - spherical parts, 6 - righting disk, 8 - conical nozzle., 9, 10 - elastic elements, springs, 11 - non-adjustable ball.

The rectification table is mounted on its base to a measuring table or other installation table, which must be rectified by a device placed on the table disk. The two holes in the base have a fixed bushing with a thread on its inner part, to which a adjusting screw is fitted with a fixed conical nozzle. Handle mounted on the cylindrical outer surface of the bushing, a cam having a rear sloping surface which contacts the spherical parts which are in contact with the cylindrical surface of the disc. The conical tip of the auger reaches another spherical piece that touches the underside of the disc without a gap. Elastic elements - one spring and two springs act on the disc downwards and in the radial direction to eliminate gaps between the disc and the push mechanisms. A stable, non-adjustable ball forms the third disc support.

Optical and geodesic alignment table has two pairs of alignment mechanisms mounted concentricly on two axes at least 90 ° to each other. On the opposite side of the disc is a third disc support - an adjustable ball.

As the auger rotates, it moves in its axial direction and the conical tip pushes the disk through a spherical piece up or down as needed. The spring holds the clamp and keeps the disc tightened with the adjustment mechanism. Horizontal alignment is accomplished by observing the object under the microscope or leaning the indicator on it so that the disk occupies an accurate horizontal position on two balls and a steady ball.

The centering is done analogously. However, when the disk is pushed in the radial direction by the knob, the cam rotates freely with a small gap on the cylindrical surface of the bushing. Its end has a sloping surface which, by touching the spherical parts, pushes the disk in a radial direction through them. The springs hold the disc tightened to the alignment mechanism and eliminate the spaces between it and the disc. Centering is performed in the same way as lying down until the desired position of the disk relative to the center of observation (rotation) is achieved by observing the object under the microscope or observing the indicator reading.

The advantage of the proposed alignment table for optical and geodetic instruments is that the alignment feed mechanisms are mounted concentrically in two positions. The operator can rotate the screws and, without changing the impact of the screws, adjust the cam from two positions, thereby simplifying and speeding up the rectification operation, increasing its accuracy. Two pairs of single-axis micro-feed mechanisms allow automated feed operations.

Claims (3)

Definition of the Invention 1. An alignment device for optical and geodetic devices which performs precise micro-thrust with respect to the axis of the device or the object to be measured, consisting of a sensing disk and a base, resilient elements connecting the disk to the base of the device and micro-ejection mechanisms. mounted concentrically to each other. 2. Optical and geodetic device alignment device according to claim 1, characterized in that the microstructure of the lying microstructure in the device design is connected to the sensing disc via a conical nozzle and a spherical part, and the microprocessing of centering is connected to the disc through a centrally mounted , acting on the disk in a radial direction. 3. Optical and geodetic device alignment device according to claim 1 or 2, characterized in that the non-adjustable sphere in the construction of the device, which is mounted opposite to the two pairs of rectifying mechanisms, forms a third disc support.