Wearable device and method for monitoring eating

A wearable device, wearable on an arm of a user, comprising an acceleration sensor, an amplifier-filter, an analog-to-digital converter, a microprogrammed control unit (MCU), a random access memory, a digital-to-analog converter, an alarm and a display unit;

• wherein the acceleration sensor is configured to acquire acceleration information of the arm of the user and convert the acceleration information into an analog electric signal;
• the amplifier-filter is connected to the acceleration sensor and configured to amplify and filter the analog electric signal;
• the analog-to-digital converter is connected to the amplifier-filter and configured to convert the analog electric signal already amplified and filtered by the amplifier-filter into a digital signal;
• the MCU is configured to calculate times of eating of the user within a predetermined duration based on the digital signal, compare an eating frequency with a reference frequency, and generate a first alarming signal if determining through comparison that the eating frequency is larger than or equal to the reference frequency;
• the random access memory is connected to the MCU and configured to store the reference frequency;
• the digital-to-analog converter is connected to the MCU and configured to convert the eating frequency of the user into an analog signal and send the analog signal to the display unit;
• the display unit is connected to the digital-to-analog converter and configured to display the eating frequency;
• and
• the alarm is connected to the MCU and configured to alarm in response to the first alarming signal,
• wherein the MCU is further configured to calculate an average eating frequency of the user within a preset test period and set the average eating frequency as the reference frequency;
• and
• the wearable device further comprises a storage configured to store the reference frequency;
• and
• wherein the MCU is further configured to set a test mode or an eating monitoring mode, when the test mode is set, the MCU is configured to calculate the average eating frequency of the user within the preset test period and set the average eating frequency as the reference frequency, and when the eating monitoring mode is set, the MCU is configured to compare the eating frequency with the reference frequency and generate the first alarming signal if determining through comparison that the eating frequency is larger than or equal to the reference frequency.