Precise inclined platform device for static calibration of seismometer

一种静态标定、平台装置的技术，应用在测量装置、应用、家里用具等方向，能够解决蜗轮蜗杆传动摩擦损耗大、没有实现全闭环控制、控制精度影响等问题，达到受力均匀、定位精度高、运行可靠的效果

Active Publication Date: 2012-06-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the typical precision tilting platform in China is an electronically controlled tilting platform for optical calibration. It is driven by a stepping motor and driven by a worm gear. Due to the existence of the transmission gap of the worm gear, the positioning accuracy is limited; The loss is large, so the transmission efficiency is low; the semi-closed-loop control can be realized after the encoder is installed, but the full-closed-loop control is not realized, and the control accuracy is also affected; in addition, the platform is not equipped with a high-precision tilt angle measuring device, and the tilt angle is measured by the motor It is converted from the given amount, resulting in a large measurement error

Method used

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  • Precise inclined platform device for static calibration of seismometer
  • Precise inclined platform device for static calibration of seismometer
  • Precise inclined platform device for static calibration of seismometer

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 , 3 , 4, 6, 7

[0040] The precision tilting platform device used for the static calibration of the seismometer includes a base 11, and the base 11 is provided with: a table top 12, which is connected with the table top 12 and drives the rotation mechanism 1 of the table top 12 to drive the table top 12 and the driving mechanism 6 that the rotating mechanism 1 rotates, the detection mechanism that detects the rotation angle of the table top, and the left support frame 5 and the right support frame that support the described table top 12 and the rotating mechanism 1;

[0041]The rotating mechanism 1 includes a main shaft 7 that allows the table 12 to rotate around it, a drive arm 13 and a turntable 16 fixed to the table 12, and a counterweight fixed to one side of the turntable 16 Block 15; the main shaft 7 is fixed on the left support frame 5 and the right support frame;

[0042] The drive mechanism 6 and the counterweight 15 are located at both sid...

Embodiment 2

[0065] refer to figure 2 , 5

[0066] The difference between this embodiment and Embodiment 1 is that the inclined platform device is also provided with a force balance spring mechanism capable of balancing the force exerted by the counterweight 15 on the slide 19, and the force The balance spring mechanism includes a spring hanging nail 33 fixed on the slide table 19, a spring bracket 34 fixed on the base 11, a spring pull nail 31 passing through the spring bracket 34, and the The nut 35 screwed to the spring rivet 31, and the spring 32 arranged between the spring rivet 33 and the spring rivet 31, the spring 32 exerts force on the sliding table 19 toward the The force in the horizontal direction of the counterweight 15.

[0067] The nut 35 is a butterfly nut. The rest of the structures are the same.

[0068] The technical idea of ​​this embodiment is: in order to reduce the load of the linear motor, a force balance spring mechanism is provided, and the load aggravation ...

Embodiment 3

[0072] The difference between this embodiment and Embodiment 1 is that the laser interferometer is installed on the interferometer bracket, the interferometer bracket is placed on the ground, and the laser interferometer is located on the table 12- On the side, the reflector 2 is installed on the table 12 .

[0073] The stand of the interferometer is a tripod.

[0074] The technical idea of ​​this embodiment is: use the interferometer bracket to install the laser interferometer, the laser interferometer can be moved conveniently, and if multiple reflectors are installed on the table, the angle change of different parts of the table can be measured conveniently, which is convenient to use.

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Abstract

A precise inclined platform device for static calibration of a seismometer comprises a base, a mesa, a rotation mechanism, a drive mechanism, a detection mechanism and a support frame, wherein the rotation mechanism comprises a spindle, a drive arm, a rotary table and a balance block; the spindle is fixed on a left support frame and a right support frame; the drive mechanism and the balance block are respectively located on both sides of the drive arm; the drive mechanism includes a linear motor, a slide table, a linear guide rail, a slider and a grating ruler; the reading head of the grating ruler is fixedly connected with the base, and sends a zero-point signal of the grating ruler when the mesa is horizontal; the sliding table tightly butts against the drive arm, and pushes the rotation mechanism to rotate forward when the linear motor moves in the forward direction; the rotation mechanism can rotate reversely due to gravity action of the balance block when the linear motor drives the sliding table to move in the reverse direction; and the detection mechanism comprises a laser interferometer and a reflecting mirror for reflecting laser back to the laser interferometer to obtain rotation angle of the mesa. The precise inclined platform device has the advantages of high location accuracy, high transmission efficiency and wide application range.

Description

technical field [0001] The invention relates to a precision inclined platform device for static calibration of seismometers. Background technique [0002] For the accelerometer used in the strong motion network, the passband starts from zero, and the sensitivity can be considered to be the same at each frequency point in its passband, and the linearity can be considered to be consistent. Therefore, accurate measurement and calibration of the sensitivity and linearity of the accelerometer at the zero frequency point (or "static") can give the main characteristic parameters of the accelerometer in its passband (especially the low frequency band). [0003] At present, the typical precision tilting platform in China is an electronically controlled tilting platform for optical calibration. It is driven by a stepping motor and driven by a worm gear. Due to the existence of the transmission gap of the worm gear, the positioning accuracy is limited; The loss is large, so the transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V13/00G01P21/00
CPCG01P21/00G01V13/00A47B37/00
Inventor 何闻徐冠华贾叔仕
Owner ZHEJIANG UNIV
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