US 12,446,819 B2
Method and device for monitoring vital sign of user
Mimi Hu, Shenzhen (CN); Haoyu Jiang, Shenzhen (CN); Wenyu Ye, Shenzhen (CN); and Xianliang He, Shenzhen (CN)
Assigned to SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD., Guangdong (CN)
Filed by SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD., Shenzhen (CN)
Filed on Jun. 28, 2021, as Appl. No. 17/361,262.
Application 17/361,262 is a continuation of application No. PCT/CN2018/124305, filed on Dec. 27, 2018.
Prior Publication US 2021/0321927 A1, Oct. 21, 2021
Int. Cl. A61B 5/347 (2021.01); A61B 5/00 (2006.01); A61B 5/339 (2021.01); A61B 5/349 (2021.01)
CPC A61B 5/339 (2021.01) [A61B 5/347 (2021.01); A61B 5/349 (2021.01); A61B 5/746 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method performed by a device for monitoring a vital sign of a user, the device comprising an ECG sensor, a signal sampling circuit including a low-precision sampling circuit and a high-precision sampling circuit, and a processor, the method comprising:
acquiring a first ECG signal outputted by the ECG sensor, said first ECG signal being an analog sensor signal;
sampling the first ECG signal to obtain a first ECG data by the signal sampling circuit using a signal sampling mode;
detecting, by the processor, a change in a user state determined by analyzing data related to the first ECG data, wherein the change in the user state comprises a change in a heart state of the user;
acquiring a second ECG signal outputted by the ECG sensor after the change in the user state is detected, said second ECG signal being an analog sensor signal; and
controlling, by the processor, the low-precision sampling circuit and the high-precision sampling circuit in response to the change in the user state to sample the second ECG signal to obtain a second ECG data; which comprises:
turning on the low-precision sampling circuit and turning off the high-precision sampling circuit to adjust the signal sampling circuit to a low-precision sampling mode, and sampling a low-frequency component in the second ECG signal by only the low-precision sampling circuit under the low-precision sampling mode to obtain first low-frequency data, in response to the user state changing from a first state to a second state; and
turning on both the low-precision sampling circuit and the high-precision sampling circuit to adjust the signal sampling circuit to a high-precision sampling mode, receiving the second ECG signal by both the low-precision sampling circuit and the high-precision sampling circuit, and independently and simultaneously sampling a low-frequency component in the second ECG signal by the low-precision sampling circuit and a high-frequency component in the second ECG signal by the high-precision sampling circuit under the high-precision sampling mode to obtain first low-frequency data and first high-frequency data, in response to the user state changing from the second state to the first state.