RU2377576C1 - Three-axis micro-mechanic gauge of motion parametres - Google Patents

Abstract

FIELD: measuring technology.

SUBSTANCE: invention refers to aerospace instrument engineering and can be used in flight control systems at measurement of angular speeds and linear accelerations. The gauge consists of a case in form of a six-facet cube with base surfaces on side facets facilitating orthogonality of installation of axes of micro-mechanic gyroscopes and accelerometres; further the gauge consists of electron sub-blocks in form of printed boards with radio-elements arranged thereon; micro-mechanic gyroscopes and accelerometres assembled on base surfaces; radio-elements of printed boards are turned inside the case. The printed boards of the electron sub-blocks are made like a cross-like two-step form. Micro-slots are assembled on projecting parts of the first step of the printing boards from the side of radio-elements arrangement; while projecting parts of the second step of the board serve for arrangement of sub-blocks on base surfaces of the case.

EFFECT: facilitating upgraded accuracy of measurement of motion parametres.

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Description

The invention relates to the field of aerospace instrumentation and can be used in aerobatic control systems for measuring angular velocities and linear accelerations [1-4].

Known triaxial micromechanical measuring instruments for angular velocities and linear accelerations, in which a hexagonal cube is used as a housing for orthogonal installation of the measuring axes of micromechanical sensitive elements [1]. The main disadvantages of this design are the increased values of the noise components in the useful signal caused by the presence of connecting cables, and the need to install an additional casing to protect the radio elements from external influences.

The prototype of the invention is a triaxial micromechanical measuring device for motion parameters, comprising a housing in the form of a hexagonal cube with base surfaces on the side faces that ensure orthogonality of the installation of the measuring axes of micromechanical gyroscopes and accelerometers, and electronic subunits in the form of printed circuit boards with radioelements, micromechanical gyroscopes, and an accelerometer mounted on base surfaces with radio elements inside the housing [2].

The main disadvantage of the design considered is the need to introduce an external cable for the electrical connection of the subunits. This leads to the appearance of additional noise in the useful signal of the meter caused by the cable connection of the subunits, and, consequently, to a decrease in the accuracy of measurements and to complicate the design of the meter.

The technical result of the invention is to improve the accuracy of measurement of motion parameters and improve the design of the meter.

The indicated technical result is achieved by the fact that in a triaxial micromechanical measuring device of motion parameters, comprising a housing in the form of a hexagonal cube with base surfaces on the side faces, ensuring orthogonality of the installation of the measuring axes of micromechanical gyroscopes and accelerometers, and electronic subunits in the form of printed circuit boards with radioelements placed on them, micromechanical gyroscopes and accelerometers mounted on base surfaces with radioelements inside the case, electronic circuit boards the throne subunits are made in a cross-shaped two-stage form, on the protruding parts of the first stage of which, from the location of the radioelements, additionally inserted electrical connecting micro connectors are installed, and the protruding parts of the second stage of the circuit board are used to install subunits on the base surfaces of the meter case, while the inner contour of the side faces repeats the shape the outer contour of the printed circuit boards of the subunits, and the outer borders of the base surfaces on which the subunits are mounted are equidistant m lines of intersection of orthogonal planes of the base by the length of the protruding portion of the first card stage.

The invention is illustrated by drawings.

Figure 1 shows the design of the housing of a triaxial micromechanical measuring device for motion parameters, where 1 is the housing, 2 is the base surface.

Figure 2 shows an electronic subunit of the sensitive elements of a triaxial micromechanical measuring device for motion parameters, where 3 is a printed circuit board, 4 is a micromechanical gyroscope, 5 is a micromechanical accelerometer, 6 is a micro connector, 7 are the protruding parts of the first stage of the board, 8 are the protruding parts of the second stage of the board .

Figure 3 shows a section of the housing of a triaxial micromechanical measuring device for motion parameters along AA, showing a diagram of the formation of the base surfaces of the housing and the installation of printed circuit boards of subunits on them.

Figure 4 shows the assembly diagram of electronic subunits in the housing of a triaxial micromechanical measuring device for motion parameters.

The technical implementation of the claimed design is as follows.

The housing 1 of a triaxial micromechanical measuring device for motion parameters is made in the form of a hexagonal cube with base surfaces 2 that ensure orthogonality of the measuring axes of micromechanical gyroscopes and accelerometers (Fig. 1). The base planes form the base hexagon on which the base mounting surfaces are formed (FIG. 3). Base surfaces are part of the base planes. The external boundaries of the base surfaces are equidistant from the line of intersection of the base planes by a distance L equal to the length of the protruding part of the first stage of the printed circuit board, which ensures the continuity of the faces of the cubic case and the connection of micro-connectors of the electronic subunits when assembling the meter (figure 4).

The printed circuit board 3 is made cross-shaped two-stage form (figure 2). A micromechanical gyroscope 4, a micromechanical accelerometer 5, a micro connector 6 and radio elements of service electronics are installed on the board. Micro connector 6 is installed on the protruding part 7 of the first stage of the board from the location of the radio elements. The length of the protruding part of the first stage 7 is L. The protruding parts 8 of the second stage of the board serve to install the subunit on the base surfaces 2 of the meter housing (Fig. 1). They made round holes for mounting screws.

The inner contour of the side faces of the casing (Fig. 1) repeats the shape of the outer contour of the printed circuit boards of the subunits (Fig. 2), and the outer borders of the base surfaces of the casing on which the subunits are mounted are equidistant from the intersection lines of the orthogonal base planes by an amount L equal to the length of the protruding part the first stage 7 of the board 3 (figure 2).

In Fig. 3, the dashed line marks the two-stage boards installed on the base surfaces 2 of the housing 1. The base surfaces for the installation of subunits are shown in the form of four rectangles with round holes in the middle.

When installing electronic subunits with the second protruding parts 8 of the printed circuit boards 3 on the base surfaces 2 of the meter body 1, the micro connectors of adjacent subunits mounted on the first protruding parts 7 of the boards 3 will enter into each other, providing electrical connection of the subunits without external hinged cables (Fig. 4).

Using the invention, it was possible to create a device with a minimum overall size of 40 × 40 × 40 mm protected from external influences, in it the electrical connection of electronic subunits is provided without hinged connecting cables, thereby eliminating additional interference induced in this cable and increasing the accuracy of the device. With minimal overall dimensions, the device provides measurement of angular velocities and linear accelerations along three orthogonal axes.

INFORMATION SOURCES

1. Three-axis acceleration and angular velocity sensor, ZAO “Argussoft company” /http://components.argussoft.ru

2. Collins AHS - 3000, Attitude Heading Reference System / www.rockwellcollins.com.

3. Suminov V.M., Galkin V.I. Status and development prospects of micromechanical gyroscopes. Scientific works "MATI", Russian State Technological University. K.E. Tsiolkovsky - MATI, Issue 10 (82). - M: EC MATI, 2006. p. 154-160.

4. Raspopov V.Ya. Micromechanical Instruments: Textbook, 2nd ed. reslave. and add. Tula State University. Moscow State Technological University K.E. Tsiolkovsky. - Tula: “Vulture and K”, 476 s, pp. 344-339,2004.

Claims (1)

A triaxial micromechanical measuring instrument of motion parameters, comprising a body in the form of a hexagonal cube with base surfaces on the side faces that ensure orthogonality of the installation of the measuring axes of micromechanical gyroscopes and accelerometers, and electronic subunits in the form of printed circuit boards with radioelements, micromechanical gyroscopes and accelerometers mounted on them surfaces of the radio elements inside the case, characterized in that the printed circuit boards of electronic subunits are made to of a two-stage form, on the protruding parts of the first stage of which additionally connected electrical connectors are installed on the side of the radioelements, and the protruding parts of the second stage of the board are used to install subunits on the base surfaces of the meter housing, while the inner contour of the side faces repeats the shape of the outer contour of the printed circuit boards of the subunits , and the external boundaries of the base surfaces on which the subunits are mounted are equidistant from the intersection lines of the orthogonal 's base planes on the length of the protruding portion of the first card stage.

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