High-precision 3D Scanning and 3D Printing Effectively Produce the Infrared Forehead Thermometer’s Shell

April 28, 2020

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Because of the COVID-19 outbreak, infrared forehead thermometers are in urgent need. The devices play an important role in screening suspected patients in public places, and are an important equipment to fight against the pandemic.

Despite the active mobilization of production, supply falls short of demand with large-scale work resumption and the continued global spread of the epidemic.

At present, the industrial production chain of infrared forehead thermometers is blocked by insufficient parts for assembling and the production capacity is relatively tight.

To produce a infrared forehead thermometer, an ABS plastic shell, PCB electric board, IC, resistor, capacitor, infrared sensor, LCD, BLU, battery cable clip and many further components are required. It takes a certain amount of time if the plastic shell is made by mould.

Traditional Mould Workflow

How to accelerate the product development and save cost by 3D digitizing solutions?

3D scanning+3D printing realizes small batch and high production efficiency.

1.Acquire accurate 3D data

With OptimScan 5M industrial grade 3D scanner, the high precision 3D data of the infrared forehead thermometer’s shell is obtained in 15 minutes

OptimScan 5M is equipped with 5.0 mega pixel cameras and blue light scanning technology, which is helpful to avoid the influence of external lights. Its scanning accuracy is up to 0.005 mm.

Principle of blue light scanning:

By combining phase and stereo vision technology, the grating is projected on the surface of the object, and the distorted grating image is taken with two CCD cameras. The phase of each point on the image taken by the left and right camera is obtained by using the coded light and phase shifting method.

After matching the points on the two images, the calibrated CCD camera system can be used to calculate the coordinates of the points in the three-dimensional space by means of the triangulation method. Finally finishing the measurement of the three-dimensional contour of the object surface.
Blue light scanning technology has high accuracy and favorable stability, and can obtain the measurement data of complex details inside the parts in a short time, so it is ideal for the inspection of injection molding, impellers, sheet metal parts, tools and moulds, die-castings, and many more.

2.Data processing

Excellent details

3.3D Printing

It takes 4h to print the thermometer shells by EP-A350 resin 3D printer whose build accuracy is ±0.08mm and scanning speed is 6-10m/s.

Printed infrared forehead thermometer’s shell

Complete production of infrared forehead thermometer

High-precision 3D scanning and 3D printing effectively reduce precious production time and cost.

With the help of 3D digitization and 3D printing technology we are able to compete more efficiently in the race against time and defeat the epidemic.