Inclined suspension seismometer and its coordinate transformation circuit and transformation method
A technology of coordinate transformation and seismometer, applied in the direction of seismic signal receivers, etc., can solve the problems of inaccurate coordinate transformation circuit signals and destruction of orthogonality
Active Publication Date: 2017-11-28
INST OF EARTHQUAKE SCI CHINA EARTHQUAKE ADMINISTATION
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[0003] The existing coordinate transformation circuit can convert the mutually orthogonal U, V, and W three-directional signals sensed by a seismometer placed on a horizontal plane into X, Y, and Z three-directional signals. When the seismometer is placed obliquely, in order to ensure the normal working state of the seismometer, it is necessary to perform a zero-adjustment operation on the pendulum of the corresponding orientation, which destroys the orthogonality of the U, V, and W orientations, and causes the output signal of the coordinate transformation circuit to be inconsistent. Inaccurate
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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0042] The inclined suspension seismometer disclosed by the present invention includes a sealed casing, three pendulum bodies in the casing and a circuit board, and the three pendulum bodies are evenly installed on the reference base plate along 120 degrees. The structures of the three pendulum bodies are the same. For mechanical pendulums with inclined suspended inverted pendulum structures, an angle sensor is installed on the base plate. Before installing the angle sensor, the base plate must be adjusted horizontally, and its installation horizontal orientation must be aligned with the X and Y directions.
[0043] Such as figure 1 As shown, the circuit board is provided with a main control chip, a coordinate transformation circuit, three oscillation and feedback circuits corresponding to the three pendulums, etc., the signal output terminal ...
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The present invention discloses an inclinedly suspended seismometer, a coordinate transformation circuit thereof and a transformation method of the coordinate transformation circuit. The sensing directions of the inclinedly suspended seismometer form a UVW coordinate system, and the seismometer comprises three swinging bodies annularly and evenly arranged on a reference bottom plate, a main control chip, an angle sensor and the coordinate transformation circuit. The angle sensor acquires an inclination angle signal of the seismometer, the main control chip performs processing according to the inclination angle signal to obtain a transformation coefficient matrix and the transformation parameters of the coordinate transformation circuit, and the coordinate transformation circuit transforms the signals in the U,V and W three directions into the signals in the X, Y and Z directions according to the transformation parameters. According to the present invention, the transformation parameters of the coordinate transformation circuit are correspondingly adjusted according to the inclination angle of the seismometer, thereby realizing the accurate measurement of the seismometer.
Description
technical field [0001] The invention relates to a coordinate transformation method of a seismometer, in particular to an inclined suspension seismometer, a coordinate transformation circuit and a transformation method thereof. Background technique [0002] The three pendulums of the inclined suspension seismometer are installed on the same datum plane, and are evenly arranged at an angle of 120 degrees along the circumference, that is, they are placed orthogonally along the U, V, and W directions. The ground vibration signals collected by the three pendulums After being processed by the coordinate transformation circuit and the signal processing circuit, it can output analog voltage signals including east-west, north-south, and vertical directions marked as X, Y, and Z directions. [0003] The existing coordinate transformation circuit can convert the mutually orthogonal U, V, and W three-directional signals sensed by a seismometer placed on a horizontal plane into X, Y, and...
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IPC IPC(8): G01V1/18
CPCG01V1/18
Inventor 薛兵朱小毅林湛李江高尚华陈阳周银兴王洪体崔仁胜刘明辉
Owner INST OF EARTHQUAKE SCI CHINA EARTHQUAKE ADMINISTATION