Film-type biomedical signal measuring apparatus, blood pressure measuring apparatus using the same, cardiopulmonary fitness estimating apparatus, and personal authentication apparatus

A blood pressure measuring apparatus comprising:

• a film-type piezoelectric element;
• a plurality of metallic thin film electrodes formed on the piezoelectric element;
• a first circuit unit measuring an electrocardiogram (ECG) signal from at least two of the plurality of metallic thin film electrodes;
• a second circuit unit measuring a ballistocardiogram (BCG) signal from at least two of the plurality of metallic thin film electrodes;
• and
• a blood pressure calculator calculating a blood pressure using the ECG signal and the BCG signal,
• wherein the plurality of metallic thin film electrodes comprise at least two first metallic thin film electrodes formed on an attachment surface of the piezoelectric element so as not to be electrically connected to each other, and a second metallic thin film electrode formed on an opposite surface of the piezoelectric element,
• wherein the blood pressure measuring apparatus further comprises a film-type substrate with an adhesion surface adhered to the opposite surface of the piezoelectric element,
• wherein a third metallic thin film electrode electrically connected to at least one first metallic thin film electrode among the first metallic thin film electrodes is formed on a formation surface of the film-type substrate,
• wherein the first circuit unit is formed on the formation surface of the film-type substrate so as to be electrically connected to at least two first metallic thin film electrodes among the first metallic thin film electrodes, and
• wherein the second circuit unit is formed on the formation surface of the film-type substrate so as to be electrically connected to the second metallic thin film electrode and the third metallic thin film electrode.

A blood pressure measuring apparatus comprising:

• a film-type piezoelectric element;
• a plurality of metallic thin film electrodes formed on the piezoelectric element;
• a first circuit unit measuring an electrocardiogram (ECG) signal from at least two of the plurality of metallic thin film electrodes;
• a second circuit unit measuring a ballistocardiogram (BCG) signal from at least two of the plurality of metallic thin film electrodes;
• and
• a blood pressure calculator calculating a blood pressure using the ECG signal and the BCG signal,
• wherein the plurality of metallic thin film electrodes comprise at least two first metallic thin film electrodes and a reference electrode formed on an attachment surface of the piezoelectric element so as not to be electrically connected to each other, and a second metallic thin film electrode formed on an opposite surface of the piezoelectric element,
• wherein the blood pressure measuring apparatus further comprises a film-type substrate with an adhesion surface adhered to the opposite surface of the piezoelectric element,
• wherein a third metallic thin film electrode is formed on a formation surface of the film-type substrate so as to be electrically connected to the reference electrode,
• wherein the first circuit unit is formed on the formation surface of the film-type substrate so as to be electrically connected to the at least two first metallic thin film electrodes, and
• wherein the second circuit unit is formed on the formation surface of the film-type substrate so as to be electrically connected to the second metallic thin film electrode and the third metallic thin film electrode.