ECG measuring device and method thereof

• US 9,258,300 B2
• Filed: 10/29/2013
• Issued: 02/09/2016
• Est. Priority Date: 10/29/2012
• Status: Active Grant

• Current Assignee: Tzu Chi University
• Original Assignee: Tzu Chi University
• Inventors: Shen, Tsu-Wang
• Primary Examiner(s): Gelagay, Shewaye
• Assistant Examiner(s): LIN, AMIE CHINYU
• Application Number:
  US14/066,029
• Publication Number:
  US 20140120876A1
• Time in Patent Office: 833 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/117 Identification of persons methods or arrangements for recognising patterns, e.g. fingerprints, G06F18/00, G06V40/00; identification of persons by analysing their voice or speech G10L17/00
• CPC Class Codes: A61B 5/35 by template matching
• CPC Class Codes: A61B 5/6898 Portable consumer electronic devices, e.g. music players, telephones, tablet computers
• CPC Class Codes: G06F 2218/12 Classification; Matching
• CPC Class Codes: G06V 40/10 Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
• CPC Class Codes: G06V 40/15 Biometric patterns based on physiological signals, e.g. heartbeat, blood flow
• CPC Class Codes: H04L 63/0861 using biometrical features, e.g. fingerprint, retina-scan cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231
• CPC Class Codes: H04W 12/06 Authentication

Abstract

The present invention discloses at least two electrodes disposed at the body of the ECG measuring device of the present invention. When a user normally uses the ECG measuring device, the two electrodes are just adhered to the hands and the face of the user. The ECG measuring method of the present invention is to measure a first ECG signal from the left hand to the left side of face of the user and a second ECG signal from the right hand to the right side of face of the user. Then a plurality of ECG features are obtained from the first ECG signal, the second ECG signal and the result, as related coefficients, of the interactive computing, as a method of plus and subtract, of the first ECG signal and the second ECG signal. Hence, a biometric authorization process is engaged according to the plurality of ECG features.

Claims

1. An electrocardiogram (ECG) measuring device, which measures subsets of Lead-I ECG vector, comprising:

a first electrode, disposed at a lateral surface or a back surface of a body of the measuring device;

a second electrode, disposed at a front surface of the body of the measuring device; and

a microprocessor, electrically connected with the first electrode and the second electrode, the microprocessor capturing a first ECG signal when the first electrode and the second electrode touch the left hand and the left side of face of a user respectively, capturing a second ECG signal when the first electrode and the second electrode touch the right hand and the right side of face of the user respectively, and captures an entire ECG signal defined as a Lead-I ECG signal when the first electrode and the second electrode touch the left hand and right hand of the user respectively;

wherein the microprocessor subtracts the first ECG signal and the second ECG signal from the entire ECG signal so as to obtain a third ECG signal, and engages the first ECG signal, the second ECG signal and the third ECG signal in a noise filtering process;

wherein the microprocessor compares the first ECG signal, the second ECG signal and the third ECG signal with an ECG template, and determines whether the first ECG signal, the second ECG signal and the third ECG signal pass a prescreen process;

wherein the microprocessor determines that the user does not pass a biometric authorization process if the first ECG signal, the second ECG signal and the third ECG signal do not pass the prescreen process, and the microprocessor extracts a first preset amount of ECG features from the first ECG signal, a second preset amount of ECG features from the second ECG signal, and a third preset amount of ECG features from the third ECG signal if the first ECG signal, the second ECG signal and the third ECG signal pass the prescreen process, and the user is engaged in the biometric authorization process according to the first preset amount, the second preset amount and the third preset amount of ECG features simultaneously.

2. The electrocardiogram (ECG) measuring device according to claim 1, wherein the first electrode and the second electrode are disposed at a casing or a display screen of the measuring device.

3. The electrocardiogram (ECG) measuring device according to claim 1 further comprising a storing unit, which is electrically connected with the microprocessor to store at least one ECG template premeasured by the user, the microprocessor comparing the ECG features with the ECG template for the user being engaged in the biometric authorization process.

4. The electrocardiogram (ECG) measuring device according to claim 3 further comprising:

a speaker unit, electrically connected with the microprocessor, the microprocessor controlling the speaker unit to make a reminding sound when the first ECG signal and the second ECG signal are measured respectively;

a microphone, electrically connected with the microprocessor, the measuring device receiving a voice signal input by the user through the microphone, the storing unit storing voice data pre-input by the user, the input voice signal and the existing voice data being compared with each other simultaneously when the user is engaged in the biometric authorization process by the microprocessor.

5. The electrocardiogram (ECG) measuring device according to claim 3 further comprising:

at least one detecting unit, electrically connected with the microprocessor, the detecting unit determining that a present measurement is for the first ECG signal from the left hand to the left side of face of the user or the second ECG signal from the right hand to the right side of face of the user when measuring.

6. The electrocardiogram (ECG) measuring device according to claim 5, wherein the detecting unit is selected from the group consisted of:

a three-axial accelerator, a gyroscope, fingerprints, and a light sensor.

7. The electrocardiogram (ECG) measuring device according to claim 1 further comprising:

a transmitting unit, electrically connected with the microprocessor, the measuring device transmitting the ECG to an external serve via the transmitting unit, the server storing at least one ECG template pre-measured by the user and comparing the input ECG features with the ECG template for the user being engaged in the biometric authorization process.

8. An electrocardiogram (ECG) measuring method, which is applied to a measuring device, a body of the measuring device being disposed a first electrode and a second electrode, the first electrode touching the hands of a user, the second electrode touching the face of the user, the method comprising the steps of:

(a01) measuring the user in order to capture an entire ECG signal, wherein the entire ECG signal is defined by measuring at Lead-I from the left hand to the right hand of the user;

(a) measuring the use to capture a first ECG signal when the first electrode and the second electrode touch the left hand and the left side of face of the user respectively, and a second ECG signal when the first electrode and the second electrode touch the right hand and the right side of face of the user respectively, wherein the second ECG signal is different from the first ECG signal;

(a11) after step (a), subtracting the first ECG signal and the second ECG signal from the entire ECG signal so as to obtain a third ECG signal;

(a12) after step (a11), the first ECG signal, the second ECG signal and the third ECG signal being engaged in a noise filtering process;

(a13) after step (a12), comparing the first ECG signal, the second ECG signal and the third ECG signal with an ECG template, and determining whether the first ECG signal, the second ECG signal and the third ECG signal pass a prescreen process;

(a14) determining that the user does not pass a biometric authorization process if the first ECG signal, the second ECG signal and the third ECG signal do not pass the prescreen process;

(b) extracting a first preset amount of ECG features from the first ECG signal, a second preset amount of ECG features from the second ECG signal and a third preset amount of ECG features from the third ECG signal respectively if the first ECG signal, the second ECG signal and the third EGG signal pass the prescreen process;

(c) comparing the first preset amount, the second preset amount and the third preset amount of ECG features with the ECG template premeasured by the user simultaneously; and

(d) determining whether the user passes the biometric authorization process according to the comparing result.

9. The electrocardiogram (ECG) measuring method according to claim 8, wherein step (a) comprises the steps of:

(a21) capturing the first ECG signal;

(a22) determining that the first ECG signal is captured by measuring from the left hand to the left side of face of the user or measuring from the right hand to the right side of face of the user;

(a23) capturing the second ECG signal;

(a24) determining whether the second ECG signal is different from the first ECG signal; and

(a25) re-measuring the user if the second ECG signal is the same as the first ECG signal.

10. The electrocardiogram (ECG) measuring method according to claim 9, wherein the measuring device provides at least one detecting unit, in step (a22) and step (a24), via the detecting unit, the measuring device detecting that a measured ECG by the user is from the left hand to the left side of face or from the right hand to the right side of face.

11. The electrocardiogram (ECG) measuring method according to claim 9, wherein the measuring device provides an application program, in step (a22) and step (a24), via the application program, the measuring device analyzing the features of the waves of the first ECG signal and the second ECG signal, in order to determine that the first ECG signal and the second ECG signal are defined by measuring from the left hand to the left side of face of the user and measuring from the right hand to the right side of face of the user.

12. The electrocardiogram (ECG) measuring method according to claim 8 further comprising the steps of:

(j) receiving a voice signal input by the user; and

(k) comparing the voice signal with a voice data pre-input by the user;

wherein the measuring device determines whether the user passes the biometric authorization process according to the comparing the input ECG features and the ECG template and the comparing the input voice signal and the pre-storing voice data.