Device for measuring volume of irregular object in non-contact measurement mode and method

Abstract

The invention provides a device for measuring the volume of an irregular object in a non-contact mode and a measurement method. The device is provided with a first camera, a second camera, a line laser arranged between the first camera and the second camera and a driving mechanism, wherein the first camera and the second camera are electrically connected with a computer, the driving mechanism comprises a stepping motor, an objective table fixedly arranged at the top end of an output shaft of the stepping motor, and a driving unit, and the driving unit is composed of a driver matched with the stepping motor and a control chip for controlling the driver to work. The measurement method includes the steps that an image is acquired, a point cloud model is built, and the volume is calculated. The volume of the irregular object, such as an object like a wooden product, a paper product and a ceramic cultural relic made of special materials, can be measured in the non-contact mode, and no damage is caused to the detected object. Operation is easy, speed is high, and accuracy is high.

Description

technical field [0001] The invention relates to a measuring device for object volume. In particular, it relates to a non-contact measuring device and method for measuring the volume of irregular objects based on line laser triangulation. Background technique [0002] The measurement of the volume of an object is of great significance in many fields such as storing objects, transporting objects, and object detection. Therefore, it is a very practical task to accurately measure the volume of objects, especially for the measurement of the volume of irregular objects. . [0003] The measurement of the volume of irregular objects can be roughly divided into two types: contact measurement and non-contact measurement. Among them, contact measurement is not suitable for objects of some special materials, such as wood products, paper products, ceramic cultural relics, etc. Therefore, the study of non-contact measurement of object volume has become a research hotspot. [0004] Non-...

AI Technical Summary

Problems solved by technology

The digital holography method irradiates the sample with laser light to study the generation and reproduction process of the hologram to achieve three-dimensional reconstruction and calculate the volume. This method is fast and has high resolution, but the measurement range is easily affected by device parameters; the phase measurement method projects the grating pattern onto On the surface of an object, the depth information modulates the amplitude and phase of the fringes to obtain three-dimensional information and volume. Take multiple images of the measured object from different angles, and then use these images to synthesize a three-dimensional model and calculate the volume. It has low requirements for measuring equipment and is easy to operate, but the measurement accuracy is not high and the algorithm complexity is high; the laser scanning method uses laser scanning. The device obtains the point cloud data, based on which the three-dimensional model of the measured object is constructed, and the volume is calculated. The measurement accuracy is related to the accuracy of the measurement equipment, but the algorithm design is relatively easy, and the complexity is low and the accuracy is high.

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