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Method and device for measuring curvature

A technology of curvature measurement and measurement value, which is applied in the field of measurement and can solve problems such as low product dimensional accuracy

Active Publication Date: 2019-06-18
SHENZHEN CITY POSONWONE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dimensional accuracy of these visual inspection equipment is low

Method used

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  • Method and device for measuring curvature
  • Method and device for measuring curvature
  • Method and device for measuring curvature

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] The invention provides a curvature measurement method, referring to figure 1 , in the first embodiment, the curvature measurement method provided by the present invention includes:

[0041] Step S10, taking the normal direction of the first target point as a reference, setting the reference point position of the rotational degree of freedom of the displacement sensor, the displacement sensor is located in the Cartesian rectangular coordinate sys...

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Abstract

The invention discloses a curvature measuring method and apparatus. The method comprises: a reference point position of a rotational freedom degree of a displacement sensor is set by using a normal direction of a first target point as a reference; the displacement sensor is controlled to rotate within a first preset angle based on the reference point position and measurement is carried out to obtain an absolute distance between the rotation center of the displacement sensor to the first target point; discrete processing is carried out on a to-be-measured object to obtain a preset number of second target points, a corresponding first Cartesian coordinate value when the displacement sensor measures each second target point and a first measurement value outputted by the displacement sensor, and a second Cartesian coordinate value of each second target point is calculated based on the first Cartesian coordinate value, the first measurement value and the absolute distance; and the curvature of each second target point is calculated based on the second Cartesian coordinate values. Because the Cartesian coordinate value of any point on the curved surface can be accurately calculated, the accuracy of curvature measurement is improved; and the measurement is more convenient and flexible.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a curvature measurement method and device. Background technique [0002] At present, there are many visual inspection devices for detecting the appearance or size of products on the market, and these visual inspection devices include multiple sensors. Place the product on the visual inspection equipment and contact with the sensor in the visual inspection equipment, and obtain the shape and size of each part of the product through the sensor, so as to determine whether the product size matches the design size. However, these visual inspection devices measure products with low dimensional accuracy. Contents of the invention [0003] The main purpose of the present invention is to provide a curvature measurement method and device, aiming at improving the measurement accuracy of curved surfaces. [0004] In order to achieve the above object, the present invention provides a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 王立军
Owner SHENZHEN CITY POSONWONE TECH
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