Device for measuring heartbeat rate

• US 5,622,180 A
• Filed: 12/08/1992
• Issued: 04/22/1997
• Est. Priority Date: 12/09/1991
• Status: Expired due to Term

• Current Assignee: Polar Electro Oy
• Original Assignee: Polar Electro Oy
• Inventors: Tammi, Tapio, Pietila, Arto
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US07/986,684
• Time in Patent Office: 1,596 Days
• Field of Search: 340/573, 340/502-505, 371/2.1, 371/4, 128/903, 128/690, 128/664, 128/666, 128/667, 128/668, 128/678, 128/689, 128/700, 128/695, 128/696, 128/706, 128/709
• US Class Current: 600/503
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/681 Wristwatch-type devices

Abstract

A device for measuring heartbeat rate that includes a device casing or wrist strap with skin contact electrodes, and a coil receiver for receiving telemetrically transmitted heartbeat signals for displaying heartbeat data either from the receiver, or the skin contact electrodes. The signals from the skin sensor are filtered, and subjected to an AGC device and pulse shaper. The received signals are amplified. A microcomputer, memory, and display are common to both the pulse shaped detected heartbeat signal and the amplified signal received from the transmitter.

Claims

1. A system for measuring a heartbeat rate of an individual, comprising a device having a casing for strapping to a wrist of the individual;

receiving means contained in the casing of the device for receiving heartbeat rate signals telemetrically transmitted from an area remote from the wrist of the individual to whose wrist the device is strapped;

first processing means contained in the casing of the device for processing the received telemetrically transmitted heartbeat rate signals;

sensor means mounted to the casing of the device for detecting heartbeat rate signal emanating from the individual to whose wrist the casing of the device is strapped when the sensor means engages the individual;

second signal processing means contained in the casing of the device for processing heartbeat rate signals sensed by the sensor means, the second signal processing means of the device including a series connected filter, gain control circuit, and a pulse shaper, coupled to a third signal processing means;

the third signal processing means, contained in the casing of the device for receiving and processing the processed heartbeat rate signals from either one of the receiving means and the sensor means; and

display means contained in the casing of the device and having an input electrically connected to the third signal processing means for displaying either the third processed telemetrically received heartbeat rate signals or the sensed heartbeat rate signals.

2. The system of claim 1 wherein the sensor means includes electrodes on a surface of the casing for detecting heartbeats at times when said surface engages the wrist of the individual.

3. The system of claim 1 wherein the sensor means includes a tonometric sensor in a surface of the casing of the device for detecting pressure variation in a blood vessel close to a surface of skin of the individual at times when the sensor engages the skin surface of the individual.

4. The system of claim 1 wherein the sensor means includes photoelectric components for detecting variations in intensity of light passing through tissue of the individual at times when the sensor means opposingly engages the tissue.

5. The system of claims 2, 4, 3 or 1 wherein the third signal processing means of the device comprises a microcomputer and memory, the microcomputer being connected to store signals in the memory from the receiving means and the sensor means.

6. The system according to claim 4 or 1 wherein the sensor means of the device includes photoelectric components for detecting variations in intensity of light passing through finger tissue of the individual at times when the sensor means opposingly engages the finger tissue.

7. The system according to claim 2, 4, 3 or 1 wherein the receiving means comprises a magnetic coil mounted to the casing of the device.

8. The system of claim 1 further comprising a transmitter for transmitting by wireless telemetric transmission heartbeat rate signals from a location remote from the casing of the device and the wearer'"'"'s wrist.