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Positive step gravity acceleration generator

A technology of gravitational acceleration and generating device, applied in the direction of velocity/acceleration/shock measurement, measurement device, testing/calibration of velocity/acceleration/shock measuring equipment, etc., to achieve the effect of easy operation, simple equipment and accurate calibration

Active Publication Date: 2020-11-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The shortcoming of this device for calibrating the acceleration sensor by the pulse method is that the vibration table vibration is required to generate a standard acceleration signal, and the standard acceleration signal is measured by the standard acceleration sensor, so there is a measurement error

Method used

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  • Positive step gravity acceleration generator
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  • Positive step gravity acceleration generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 and figure 2 As shown, the positive step gravitational acceleration generating device includes a base 21, and the base 21 is provided with a drop weight 2 suspended by a wire rope and a falling channel for accommodating the drop weight 2 and allowing the drop weight 2 to perform free fall motion. , the wire rope lifts the drop hammer 2 in the vertical direction, and the end point of the drop passage is a retaining ring 3. The drop hammer 2 includes a hammer body 2A and an extension section 2B at the bottom of the hammer body 2A. There is a gap between the hammer body 2A and the falling channel. The extension section 2B extends into the retaining ring 3 and is fixed at the bottom of the drop hammer by a calibration sensor.

[0026] After the wire rope is disconnected, the drop hammer 2 is free-falling in the falling channel until the drop hammer 2 is supported by the retaining ring 3 . Every time the wire rope is disconnected, a constant positive step...

Embodiment 2

[0033] The difference between this embodiment and embodiment 1 is that: this embodiment adds a wire wheel, a first guide wheel and a second guide wheel structure on the axle mounting plate, and the rest of the structure is the same as that of embodiment 1.

[0034] Such as image 3 As shown, there is a wire wheel on the wheel shaft mounting plate 7, a first guide wheel and a second guide wheel, the wire rope is wound and stored in the line wheel, the line wheel shaft 11 is rotatably connected to the wheel shaft mounting plate 7, and the wheel shaft brake is arranged beside the line wheel shaft 11 . The wire rope is pulled out from the wire wheel and passed around the first guide wheel and the second guide wheel in turn, the wire rope is tensioned on the first guide wheel and the second guide wheel in turn, and the wire rope is in a vertical state after passing through the second guide wheel Pass through the wire hole. In this embodiment, the first guide wheel is closer to th...

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Abstract

The invention discloses a positive step gravitational acceleration generation device. The device comprises a base; a falling channel along a vertical direction is formed in the base; a drop hammer isarranged in the falling channel; a gap is left between the drop hammer and the falling channel; the bottom of the falling channel is provided with a stopping portion; the drop hammer is provided witha mounting surface for mounting a calibrated sensor; and the mounting surface is exposed at the falling channel. The gap between the drop hammer and the falling channel enables the drop hammer to fallfreely in the falling channel; and the terminal point of the free fall of the drop hammer is the stopping portion. According to the positive step gravitational acceleration generation device of the invention, positive step gravitational acceleration signals are adopted to calibrate an acceleration sensor; positive step gravitational acceleration signals generated for calibration each time are generated by gravity, and the magnitude of acceleration generated by gravity is constant, and therefore, the acceleration sensor can be accurately calibrated. The device is of simplicity and is easy to operate.

Description

technical field [0001] The invention relates to the field of measurement and calibration of acceleration sensors, in particular to a positive step acceleration generating device. Background technique [0002] Acceleration sensor is an important measuring element, which is widely used in aerospace, military, industry, automobile and other fields. Accelerometers need to be calibrated during manufacture and use. [0003] Chinese patent No. 201220747057.4 discloses an acceleration sensor calibration device based on a vibrating table, including a vibrating table and an inline resonant beam. The two ends of the resonant beam are fixedly connected to the base through the beam bracket, and the A selected position is rigidly connected to the working surface of the vibrating table, and the resonant beam is perpendicular to the moving direction of the working table of the vibrating table, and at the same time, the selected position on the resonant beam is also provided with an acceler...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P21/00
CPCG01P21/00
Inventor 何闻黄凌浩贾叔仕
Owner ZHEJIANG UNIV