Three-shaft high-low temperature speed turntable

Abstract

The invention belongs to a gyro calibrator and discloses a three-shaft high-low temperature speed turntable adaptable to high and low temperature ranges. The turntable comprises a turntable base, an outer frame, a middle frame, an inner frame, driving shafts of the outer frame, the middle frame and the inner frame, and a driving motor, wherein the outer frame has a U-shaped structure, the driving shaft of the outer frame is arranged in the turntable base; the turntable also comprises a temperature box, the outer frame, the middle frame and the inner frame are arranged in the temperature box, and a base plate of the temperature box is provided with a shaft hole which allows the driving shaft of the outer frame to pass through; the middle frame and the inner frame are standard positive circular ring shaped; and the wall of the temperature box is provided with a glass window. The three-shaft high-low temperature speed turntable has the advantages that tests on a gyro in three directions in a high temperature environment and a low temperature environment can be performed simultaneously, and the turntable has low requirement on the motor moment and has high test efficiency.

Description

technical field [0001] The invention belongs to gyroscope calibration equipment, in particular to a three-axis high and low temperature rate turntable which can be applied in the range of high and low temperature. Background technique [0002] At present, the forms of turntables for calibrating three-axis gyroscopes in high and low temperature environments at home and abroad are generally in the following forms: one, two-axis or three-axis turntables, and the temperature box is set on the rolling axis table. Due to the size of the temperature box cavity and weight, not only the frame size of the azimuth, pitch and roll of the entire turntable needs to be greatly expanded, but also the large moment of inertia of the frame also requires a high output torque of each axis motor, thus resulting in the azimuth, pitch of most turntable structures The frame adopts a mechanical manual method, and the safety of the electronic control method is not high, resulting in high cost of the t...

AI Technical Summary

Problems solved by technology

[0002] At present, the forms of turntables for calibrating three-axis gyroscopes in high and low temperature environments at home and abroad are generally in the following forms; one, two-axis or three-axis turntables, temperature The box is set on the rolling axis workbench. Due to the size and weight of the incubator cavity, not only the frame size of the azimuth, pitch, and roll of the entire turntable needs to be greatly expanded, but also the large moment of inertia of the frame also affects the output of each axis motor. The torque requirement is very high, so most of the azimuth and pitch frames of the turntable structure adopt the mechanical manual method, and the safety of the electronic control method is not high, resulting in high cost of the turntable and low test efficiency

2. Single-axis turntable, the temperature box chamber is set on the workbench, and each direction of the test gyro needs to go through a heating and cooling process. To change the direction, the temperature box needs to return to normal temperature and manually turn over the product to test the three sensitive directions of the gyro. Three heating and cooling processes are required, resulting in low test efficiency, and the gyro measurement round time is too long to calibrate the three sensitive direction indicators of the three-axis gyro under the same conditions, resulting in inaccurate test data

3. The normal temperature turntable is used. After the product is kept in the incubator for a period of time, it is quickly taken out and placed in the incubator and then installed on the upper turntable for testing. This method of testing is more troublesome. First, the temperature of the product cannot be kept constant after it comes out of the incubator. For long-term When the time measurement temperature changes greatly, the temperature needs to be re-set; secondly, if the incubator is opened at a low temperature, due to high and low temperature control, the convection incubator will be seriously frosted, and the product will also be frosted and condensed, which may damage the product. more uncertainty

[0003] Regarding the turntable for calibration of inertial gyroscope accuracy indicators in high and low temperature environments, the outer, middle and inner frames (ie azimuth, pitch and roll frames) are placed in the incubator The structural form within, there is no corresponding product and report

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