Linear dynamic calibration device

A dynamic calibration, linear motion technology, applied in the directions of measurement devices, instruments, surveying and navigation, etc., can solve the problems of unstable movement speed, the movement speed of the air-floating table cannot meet the dynamic calibration requirements of high-speed photogrammetry systems, and structural assembly difficulties.

Pending Publication Date: 2019-08-16
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Application Information

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Problems solved by technology

[0009] (1) The installation position of the linear motor is located under the air flotation slide table. Since the mover and stator of the linear motor must be installed with a certain gap, this structure is difficult to assemble
[0010] (2) The movement speed of the air-floating slide table ca

Method used

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Embodiment 1

[0038] Such as figure 1 As shown, the linear dynamic calibration device disclosed in this embodiment is used to solve the current digital photogrammetric system related dynamic parameters and other comprehensive parameters of the value traceability and measurement calibration problems. The linear dynamic calibration device disclosed in this embodiment is divided into two parts, one is a mechanical structure, and the other is a calibration module. The mechanical structure is the hardware foundation of the present invention. It consists of four parts, namely the marble base 1, the linear motion guide 2, the air-floating sliding table 4 components, the linear motor and the control system. The respective parts are installed on the four parts. . The calibration module uses a digital photogrammetry system to take pictures of a photographic target set on the air-bearing slide 4, the target position standard quantity is obtained through pre-calibration, and the length standard quantity...

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Abstract

The invention discloses a linear dynamic calibration device, and belongs to the field of digital photogrammetry in geometric quantity measurement. The linear dynamic calibration device disclosed by the invention mainly consists of two parts: a mechanical structure and a calibration module. The mechanical mechanism is mainly composed of four parts: one is a base, the other is a linear motion guiderail, the third is an air floating sliding table component and the fourth is a linear motor and control system. The calibration module is mainly composed of two parts: one is a photographing target, and the other is a magnetic railing ruler and frequency meter. A linear motor is used as a driving unit, which is connected with an air floating sliding table for moving, the magnetic railing ruler isused as a feedback distance signal to realize a closed-loop control function, the photogrammetry target is installed on the air floating sliding table, the air floating sliding table together with thephotogrammetry target can perform uniform linear motion, a digital photogrammetry system measures the moving photographing target and compares a measurement result with a standard value to realize the calibration of the dynamic performance of the digital photogrammetry system. The linear dynamic calibration device disclosed by the invention has a measurement range of 0-3.6m and a maximum runningspeed of 5 m/s, and ensures a uniform motion distance of 1m at the maximum running speed.

Description

Technical field [0001] The invention belongs to the field of digital photogrammetry in geometric quantity measurement, and particularly relates to a linear dynamic calibration device. Background technique [0002] The photogrammetric system has been widely used in automobile manufacturing, aerospace, shipbuilding and other fields after being introduced into our country. In recent years, thanks to the advancement of photographic equipment and the development of data processing methods such as image processing, feature extraction and target discrimination, photogrammetry technology has been increasingly applied in the field of dynamic tracking measurement. [0003] With the increasing demand for non-contact dynamic measurement, domestic and foreign manufacturers have introduced many photogrammetric equipment that can measure dynamic characteristics, which are used in aerospace, shock and vibration, life sciences and other fields. Some of the equipment already has a sampling frequency...

Claims

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Application Information

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IPC IPC(8): G01C25/00G01C11/00
CPCG01C25/00G01C11/00
Inventor 李艳李鸿儒徐永瞿剑苏马晓苏
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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