Apparatus and method for state detection

An apparatus for state detection, comprising:

• one or more charge sensing elements arranged on a terminal;
• a charge collection circuit connected to the charge sensing element;
• and
• a state detection module connected to the charge collection circuit;
• wherein the charge sensing element is configured to radiate charge generated by the charge collection circuit and transmit reflected charge to the charge collection circuit;
• wherein the charge collection circuit is configured to generate charge and radiate the charge out through the charge sensing element, and collect the reflected charge from each of the charge sensing elements to generate an induced charge value of the charge sensing element, and output the induced charge value of each of the charge sensing elements to the state detection module;
• wherein the state detection module is configured to determine a state of the terminal according to the induced charge value;
• wherein the state detection module comprises a material identification unit which is configured to determine the material of an object currently contacted or approached by the terminal;
• wherein the charge collection circuit is configured to obtain a value of time difference from an emission of the charge to a reception of the reflected charge and send the value of time difference to the state detection module;
• and
• wherein the material identification unit is configured to determine a distance between the terminal and the object according to the value of time difference, and according to the induced charge value and the distance, search from a preset correspondence table of the induced charge value, distance, and material to determine the material of the object currently contacted or approached by the terminal.