Non-contact measurement methods are mainly divided into two categories.
One is a passive method, that is, does not require a specific light source, depends entirely on the natural light conditions of the object to scan, often using binocular technology, but the accuracy is low, only objects with geometric features can be scanned, can not meet the requirements of many fields .
The other is the active method, which is to project a specific light to the object, which represents the technical laser
line scan, the accuracy is relatively high, but because only one light can be projected at a time, the scanning speed is slow. In addition, because lasers can cause harm to living organisms and more precious objects, they cannot be used in certain areas.
The emerging technology is structured light scanning. Structured light is also an active method. By projecting or rastering multiple light rays at the same time, one surface of the object can be taken. Only a few surfaces are needed to complete the scan. Yes 3D Scanner
Scanning speed is fast and programmable.
There is also a low frequency pulse wave (low frequency sound wave) type principle, which is mainly used for level measurement. The low-frequency pulses are transmitted based on the two-dimensional array beamformer and the 3D level scanner receives echoes from the silo, bin, or other chamber material. The digital signal processor of the device samples and analyzes the received signal. By estimating the time and direction of arrival of the echo, the processor forms a three-dimensional map of the surface of the material. This image is processed by a proprietary calculation method. And generate 3D images, which can be displayed on the remote screen. The level gauge can accurately calculate the volume and quality of materials according to this, enough to make the process level monitoring and inventory control reach a new height. Accurate material inspection of level gauges can improve operational efficiency and management capabilities, reduce the high cost of unexpected situations, and accelerate revenue returns.