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Micro-miniature inertial measuring unit

An inertial measurement device, micro-miniature technology, applied in the direction of measuring device, measuring acceleration, using acceleration to measure speed, etc., can solve the problems of low precision of silicon micro gyroscope and difficult to improve the precision

Inactive Publication Date: 2009-07-22
HARBIN ENG UNIV
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Problems solved by technology

[0005] The object of the present invention is to provide a kind of shortcoming that can overcome the low precision of silicon micro-gyro, precision is difficult to improve, make full use of the advantages of simple physical mechanism of silicon micro-accelerometer, easy precision improvement, expand the application range of silicon micro-accelerometer at the same time. inertial measurement unit

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Embodiment Construction

[0077] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0078] (1) The configuration and installation scheme of the accelerometer

[0079] Combined with Figure 4, a configuration of nine accelerometers is adopted, and the accelerometers are mounted on the backplane, and the backplane is embedded on the cube frame as a cube surface. The measurement axes of the accelerometers are all along the coordinate axis, and six accelerometers are installed at 10 cm from the origin of the coordinate system, and three accelerometers are installed at the origin of the coordinate system.

[0080] (2) Data processing system hardware solution

[0081] The data processing system uses DSP for control, data communication, various data processing and solution of navigation equations.

[0082] The system is designed with a stacked and modular structure, and the bus is connected in layers in the form of "pins" and "holes". This stacked pac...

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Abstract

The invention provides a microminiature inertial measuring unit, comprising an acceleration sensor unit, a signal conditioning circuit part, an A / D conversion module and a control and data processing part consisting of DSP chips, wherein the acceleration sensor unit comprises nine acceleration sensors arranged in a case and is positioned at the front end, output signals of the acceleration sensor unit are input to the A / D conversion module through the signal conditioning circuit; signals output by the A / D conversion module enter the control and data processing part consisting of DSP chips; and the control and data processing part comprises a data preprocessing module and an angular movement parameter calculation module; the data are preprocessed and relative movement parameters are then calculated and output by angular movement and linear movement parameter calculation methods. The device expands the application range of silicon micro-accelerometers, overcomes the shortcoming of low precision of silicon micro-gyroscope and calculates the angular velocity by using the measuring information of acceleration.

Description

(1) Technical field [0001] The invention relates to an angular velocity measuring device, in particular to a device for measuring the angular velocity and linear acceleration of a moving carrier. (2) Background technology [0002] The inertial measurement unit is the main device for measuring acceleration and angular velocity in a moving carrier. It is a necessary device to realize inertial navigation by calculating the navigation and positioning parameters of the carrier based on its measured values. The micro-miniature inertial measurement units currently used are all composed of silicon micro-gyroscopes and silicon micro-accelerometers. The gyroscopes are used to measure the angular velocity of the carrier, and the accelerometers are used to measure the linear motion and linear acceleration of the carrier. Usually, three single-axis gyroscopes with sensitive axes installed perpendicular to each other and three single-axis accelerometers with sensitive axes installed perpe...

Claims

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Application Information

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IPC IPC(8): G01C21/16G01P15/00G01P7/00
Inventor 吴俊伟林志强王小旭史震周雪梅何昆鹏
Owner HARBIN ENG UNIV
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