How is the quality of mobile writing boards tested?

At present, the application of mobile writing boards in the field of multimedia equipment education is developing rapidly. Its revolutionary role is to completely liberate teachers from chalk dust. The interactive education method also fully meets the needs of quality education. Mobile writing boards do not need dedicated pens, are simple to operate and use, and are stable and reliable. How is the quality of mobile writing boards tested? Let us learn about it below.

1. Appearance:

Considering the need for safety, the product must not have sharp corners and edges; the color of the product frame should be considered so that students will not suffer visual fatigue after long-time viewing. Bright colors simply attract visual attention, but long-term use is not good for eyesight. Considering the rich colors of multimedia materials imaged on the panel, bright colors will replace them and dominate the audience. The treatment of colors should consider five to seven years. After long-term air oxidation and students' frequent wiping, gorgeous colors lose their beauty and become ugly. Just like clothing, no matter how fashionable, gray and black are the same whatever the color. They blend with the traditional black and white projection screens and thus become an eternal classic: clear contrast, no visual fatigue, and clear gaps;

2. Materials:

Considering the principle of infrared matrix scanning interactive electronic whiteboards, the flatness of the whiteboard writing surface is required to be good, so the following parts are analyzed from the appearance of the whiteboard:

A. Frame: at present, manufacturers generally use aluminum alloy extrusion profiles. The strength of the profile planning determines the degree of constraint on the data flatness of the writing contact surface. That is, if the frame data is strong enough, even a small amount of board deformation can still be corrected by the frame. In other words, the board deformation caused by various possible climate changes in the future can be constrained by a sturdy frame, thereby ensuring the flatness of the board after years of use; but with the increase of cost pressure, some manufacturers reduce the thickness of the aluminum alloy material, thereby reducing the weight of the metal material and the cost. The quality impact of an interactive electronic whiteboard cannot basically be found in a short time, but after several climate change cycles, the shortcomings are completely exposed. I hope you can find the manufacturer at that time! Therefore, evaluating the structural strength of the mobile writing board data is an important part of ensuring quality.

B. Writing, contact and imaging panels:

1. First, we should study the spot effect in projection imaging. The smaller the spot effect, the less damage to eyesight.

2. There is also projection gain;

3. There are currently two kinds of board surfaces: those that can be written on with ordinary whiteboard pens and those that cannot. The former requires high quality and costs relatively more, so it is easy to wipe and leaves few residues after writing;

4. Appearance hardness;

5. Appearance materials: there are usually appearance processes and materials such as sprayed paint, enamel, film, decorative panels, and natural PVC appearance. Considering that the board surface needs to be written on frequently, or may be hit and knocked by hard objects, it is recommended that, on the premise of meeting the above conditions, it should not crack or lose paint, affect the projection effect, and be convenient for maintenance;

6. Board materials or processes: at present, aluminum honeycomb panels, PVC integrated free foam panels, and plywood are commonly used. At the same time, plywood materials include high-density polystyrene foam, paper honeycomb panels and other lightweight filling materials. Considering the flatness requirement of the infrared principle, mobile writing board manufacturers can only remind users not to be greedy for cheap. Remember, integrated molding is better than data bonding; the same data (same thermal expansion and contraction coefficient) is better than different data bonding; different data with similar thermal expansion and contraction coefficients is better than different data bonding. The weight of the data is not the key factor of quality assurance. The key factor of quality assurance is that board deformation or glue layer peeling cannot occur under various climatic conditions!

7. Adhesive materials: environmentally friendly adhesive materials must be better than non-environmentally friendly materials. The mobile writing board can be judged by smelling it with the nose. Beware of the harm of formaldehyde!