Electrocardiogram measurement device for vehicle, system including the same, and method therefor
An electrocardiogram (ECG) measurement device for a vehicle is provided. The ECG measurement device includes an impedance compensator that corresponds to an electrode in contact with a body of a driver and configured to compensate an impedance of each of electrode signals received from the electrode. An electrode selector sequentially selects the electrode signals in response to receiving the electrode signals from the electrode. A differential amplifier differentially amplifies the electrode signals. In particular, each electrode signal has the compensated impedance. Additionally, a signal quality evaluator evaluates quality of an ECG signal output from the differential amplifier and a compensation controller then adjusts an impedance compensation value of each of the impedance compensators as a result of evaluating the quality of the ECG signal.
1. An ECG measurement method for a vehicle, comprising:
recognizing contact of a body of a driver with a first electrode in contact with the body of the driver, and outputting a first electrode signal from the first electrode;
recognizing contact of the body of the driver with a second electrode, and outputting a second electrode signal from the second electrode;
outputting an ECG signal by differentially amplifying the first electrode signal and the second electrode signal;
evaluating quality of the ECG signal; and
adjusting impedance compensation of the first electrode signal or the second electrode signal based on evaluating the quality of the ECG signal and vehicle information,
wherein the vehicle information includes at least one of global positioning system (GPS) information, a vehicle speed, a temperature, or humidity.
2. The method of claim 1 , further comprising:
storing the ECG signal in an ECG recorder when the quality of the ECG signal is greater than or equal to a threshold.
3. The method of claim 1 , wherein the evaluating of the quality of the ECG signal comprises:
detecting strength and a noise component of the ECG signal; and
evaluating the quality of the ECG signal based on the detected strength and noise component of the ECG signal.
4. The method of claim 1 , wherein the adjusting of the impedance compensation comprises:
adjusting an impedance compensation value of the first electrode signal or the second electrode signal on an independent basis as a result of evaluating the quality of the ECG signal.
5. The method of claim 1 , wherein the adjusting of the impedance compensation comprises:
adjusting an impedance compensation value of the first electrode signal or the second electrode signal on an independent basis using the result of evaluating the quality of the ECG signal and the vehicle information.