Force measurement device for measuring low-frequency force and high-frequency force

A force measurement device, comprising:

• a central portion, configured to be subjected to a first force and a second force, wherein a first frequency of the first force is lower than a second frequency of the second force;
• at least one fixing portion;
• at least one first sensing portion, having a first natural frequency, wherein the at least one first sensing portion is connected to the central portion;
• a second sensing portion, having a second natural frequency, wherein the second sensing portion is connected to the at least one first sensing portion and connected to the at least one fixing portion;
• at least one first electromechanical element, disposed on the at least one first sensing portion and configured to measure a first vibration amplitude of the at least one first sensing portion;
• and
• at least one second electromechanical element, disposed on the second sensing portion and configured to measure a second vibration amplitude of the second sensing portion;
• wherein when the central portion is subjected to the first force, the first vibration amplitude is larger than the second vibration amplitude;
• when the central portion is subjected to the second force, the first vibration amplitude is smaller than the second vibration amplitude.