US 12,493,385 B2
Method for recognizing material, interactive board, and storage medium
Fei Wang, Guangzhou (CN); Cai Chen, Guangzhou (CN); and Jianxin Lin, Guangzhou (CN)
Assigned to GUANGZHOU SHIYUAN ELECTRONIC TECHNOLOGY COMPANY LIMITED, Guangzhou (CN); and GUANGZHOU SHIYUAN ARTIFICIAL INTELLIGENCE INNOVATION RESEARCH INSTITUTE CO., LTD., Guangzhou (CN)
Filed by GUANGZHOU SHIYUAN ELECTRONIC TECHNOLOGY COMPANY LIMITED, Guangzhou (CN); and GUANGZHOU SHIYUAN ARTIFICIAL INTELLIGENCE INNOVATION RESEARCH INSTITUTE CO., LTD., Guangzhou (CN)
Filed on Dec. 5, 2024, as Appl. No. 18/969,269.
Application 18/969,269 is a continuation of application No. PCT/CN2023/080607, filed on Mar. 9, 2023.
Prior Publication US 2025/0094003 A1, Mar. 20, 2025
Int. Cl. G06F 3/042 (2006.01); G06F 3/041 (2006.01); G06F 3/043 (2006.01); G06N 3/084 (2023.01)
CPC G06F 3/0421 (2013.01) [G06F 3/04142 (2019.05); G06F 3/043 (2013.01); G06N 3/084 (2013.01); G06F 3/0416 (2013.01); G06F 2203/04106 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for recognizing a material, performed by an interactive board, wherein the interactive board comprises:
an operation panel;
an infrared touch sensor; and
an elastic wave sensor, wherein the infrared touch sensor is arranged on at least one edge of the operation panel to form a touch detection region of the interactive board, and the elastic wave sensor is configured to detect vibration of the operation panel and generate an electrical signal, and
wherein the method comprises:
generating an infrared blocking electrical signal by the infrared touch sensor from a first moment when a touch object performs a touch operation in the touch detection region;
generating an original touch electrical signal by the elastic wave sensor from the first moment;
calculating an average energy value of the original touch electrical signals within a current time window;
calculating a ratio of the average energy value to an historical average energy value, wherein the historical average energy value is an average energy value of the original touch electrical signals within a previous time window;
determining whether the ratio is greater than a preset threshold;
acquiring an initial moment of the current time window as a starting moment of an effective touch electric signal when the ratio is greater than the preset threshold;
acquiring an effective touch electrical signal within a preset time length after the starting moment as elastic wave data; and
determining first material information of the touch object based on the infrared blocking electrical signal and the elastic wave data.