| 摘要 |
<p>This invention aims at improving a method of carrying out communication between a transmission unit and a reception unit in a pulse rate meter and providing a pulse rate meter not influenced by noise. To achieve these objects, the present invention provides a pulse rate meter comprising a transmission unit provided with a detecting circuit for detecting an electrocardiographic signal obtained from a pair of electrodes fixed to the portion of a human body which is in the vicinity of the heart (2), and generating a detected signal (3), an interval data preparation circuit for counting the generation interval of the detected signals by a signal of a predetermined cycle and generating interval data (4), a serial data preparation circuit for converting the interval date into a serial signal and generating serial data signal (5), a transmission circuit for modulating the serial data signal and transmit the resultant signal as a ratio signal (6), and a battery as a power source (7), and a reception unit provided with a reception circuit for receiving the radio signal from the transmission unit, demodulating the resultant signal and generating a reception signal (8), a data decoding circuit for decoding the reception signal and generating electrocardiographic interval data (9), an operation circuit for calculating a heart rate on the basis of the electrocardiographic interval data, and a display for indicating a heart rate thereon. According to the present invention, even when the reception circuit receives noise or a signal having no relation with a heart rate, which does not constitute correct data in this case, it cannot be decoded correctly by the decoding circuit, and the data received normally in the preceding time are displayed. Therefore, erroneous heart rates are not displayed.</p> |
