Inertia measurement unit

An inertial measurement unit and circuit technology, which is applied in the direction of using inertial force for acceleration measurement, measurement device, multi-dimensional acceleration measurement, etc., can solve the problems of restricting the measurement accuracy of MEMS inertial measurement unit, low measurement accuracy, and restricting the accuracy of the composition system.

CN102455184AInactive Publication Date: 2012-05-16刘胜
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-05-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an inertia measurement unit, which comprises a gyroscope, an accelerometer, a temperature sensor, a GPS (Global Position System), a magnetic field sensor, a pneumatic height gauge, an airspeed pipe, an optical image sensor, a thermal infrared image sensor and a signal processing unit; a signal modulating and converting circuit is connected with output ends of various sensors and used for receiving signals of various sensors; the signal modulating and converting circuit is connected with a calibration and digital processing circuit; the calibration and digital processing circuit is used for processing measurement signals of various sensors and then conveying into an SPI (Serial Peripheral Interface) circuit and a CAN (Controller Area Network) controller; the gyroscope and the accelerometer are connected with a self-detecting circuit and a digital control circuit; the signal modulating and converting circuit is directly connected with the digital control circuit; and the calibration and digital processing circuit is connected with the digital control circuit through an alarm circuit. The inertia measurement unit disclosed by the invention has the advantage of overcoming the inertia measurement precision problem of a micro electromechanical system and is multiple in function, high in precision, low in cost, minimized and high in reliability.
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Description

technical field

[0001] The invention relates to a measuring device, in particular to an inertial measurement unit. Background technique

[0002] Micro-electromechanical system (MEMS) inertial sensors have the advantages of low cost, small size, large measurement range, high reliability, and easy digitization, and the MEMS inertial measurement unit composed of MEMS inertial sensors is an autonomous inertial navigation combination. With the characteristics of good concealment, high data update rate, high short-term accuracy and good stability, the navigation and guidance technology based on MEMS inertial measurement unit has been developed rapidly, and is widely used in the fields of automobile industry, aerospace, national defense technology, etc. . However, limited by the current technological level, detection circuit and other conditions, the current MEMS inertial sensors generally have shortcomings such as low measurement accuracy and large noise, which restricts the accu...

Examples

Embodiment Construction

[0010] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0011] see figure 1 , the present invention consists of GPS1, three-axis MEMS gyroscope 2, optical image sensor 3, three-axis MEMS accelerometer 4, thermal infrared image sensor 5, temperature sensor 6, magnetic field sensor 7, barometric altimeter 8, airspeed tube 9, signal The processing unit 10 is composed. The signal processing unit 10 is composed of a signal conditioning and conversion circuit 11 , a calibration and digital processing circuit 12 , an SPI interface circuit 13 , a CAN controller 14 , a self-test circuit 15 , a digital control circuit 16 , an alarm circuit 17 and a power manager 18 . The signal conditioning and conversion circuit 11 is connected with GPS1, three-axis MEMS gyroscope 2, optical image sensor 3, three-axis MEMS accelerometer 4, thermal infrared image sensor 5, temperature sensor 6, magnetic field sensor 7, barometric altimete...