Wireless switch for a telemetric receiver

• US 5,486,818 A
• Filed: 11/14/1994
• Issued: 01/23/1996
• Est. Priority Date: 07/26/1991
• Status: Expired due to Term

• Current Assignee: Polar Electro Oy
• Original Assignee: Polar Electro Oy
• Inventors: Loponen, Erkki
• Primary Examiner(s): Peng, John K.
• Assistant Examiner(s): Wu, Daniel J.
• Application Number:
  US08/340,479
• Time in Patent Office: 435 Days
• Field of Search: 340/870.31, 379/38, 128/903, 128/687, 128/696, 607/32, 607/60, 607/30
• US Class Current: 340/870.31
• 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: G08C 17/04 using magnetically coupled devices
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

The invention relates to a wireless switch for a telemetric receiver in a pulse meter, comprising a switch (7) for detecting the intensity of a telemetric signal received in the telemetric receiver and actuating the desired function of the pulse meter when the signal exceeds a predetermined threshold value. In the invention, the inductance (L1) by which the receiver establishes an inductive coupling with a transmitter in telemetric pulse measuring is used as a detector in the switch (7) for detecting the intensity of the telemetric signal.

Claims

1. A wireless switch for a telemetric receiver in a pulse meter, wherein the receiver receives a telemetric pulse measuring signal from a transmitter by means of an inductive coupling between the transmitter and the receiver, the wireless switch, comprising:

means for detecting the intensity of the telemetric pulse measuring signal inductively received in the telemetric receiver and for causing a pulse measuring function of the pulse meter to be activated in the receiver at times when the signal intensity exceeds a predetermined threshold value, the activated pulse measuring function being terminated by causing a second telemetric pulse measuring signal having an intensity exceeding said threshold value to occur in the inductance of the receiver at times when the pulse measurement function is active wherein the means for detecting the intensity of the telemetric pulse measuring signal includes the same inductance used by the receiver for the inductive coupling of the transmitter.

2. A wireless switch according to claim 1, wherein the pulse measuring signal intensity having the predetermined threshold value sufficient to activate said function of the pulse meter is substantially greater than the signal intensity required for the inductive coupling to effect actual pulse measurement without said activation.

3. A wireless switch according to claim 2, wherein a signal intensity sufficient to activate said function of the pulse meter is obtained by bringing the receiver closer to the transmitter than when effecting actual pulse measurements without said activation.

4. A wireless switch according to any one of claims 1 to 3, wherein the switch comprises a semiconductor switch having a base connected to the inductance of the receiver so that when the intensity of the pulse measuring signal generated by the inductance exceeds the predetermined threshold, the semiconductor switch is switched on and generates a pulse for actuating the function of the pulse meter.

5. A wireless switch for a telemetric receiver in a pulse meter, wherein the receiver receives a telemetric pulse measuring signal from a transmitter by means of an inductive coupling between the transmitter and the receiver, the wireless switch, comprising:

means for detecting the intensity of the telemetric pulse measuring signal inductively received in the telemetric receiver and for activating at least one function of the pulse meter at times when the signal intensity exceeds a predetermined threshold value, the means for detecting the intensity of the telemetric pulse measuring signal including the same inductance used by the receiver for the inductive coupling of the transmitter, and

an operating mode of the receiver being changeable at times when the pulse measuring function is active in response to a subsequent signal exceeding said threshold value occurring in the inductance of the receiver.

6. A wireless switch according to claim 5 wherein the pulse measuring signal intensity having the predetermined threshold value sufficient to activate said at least one function of the pulse meter is substantially greater than the signal intensity required for the inductive coupling to effect actual pulse measurement without said activation.

7. A wireless switch according to claim 6 wherein a signal intensity sufficient to activate said at least one function of the pulse meter is obtained by bringing the receiver closer to the transmitter than when effecting actual pulse measurements without said activation.

8. A wireless switch for a telemetric receiver in a pulse meter, wherein the receiver receives a telemetric pulse measuring signal from a transmitter by means of an inductive coupling between the transmitter and the receiver, the wireless switch, comprising:

means for detecting the intensity of the telemetric pulse measuring signal inductively received in the telemetric receiver and for activating at least one function of the pulse meter including the pulse measuring function at times when the signal intensity exceeds a predetermined threshold value, the means for detecting the intensity of the telemetric pulse measuring signal including the same inductance used by the receiver for the inductive coupling of the transmitter;

and a loudspeaker included in the receiver to give an acoustic signal at times when the pulse measuring function is switched on or off, or at times when an operating mode of the receiver changes.

9. A wireless switch according to claim 8 wherein the pulse measuring signal intensity having the predetermined threshold value sufficient to activate said at least one function of the pulse meter being substantially greater than the signal intensity required for the inductive coupling to effect actual pulse measurement without said activation.

10. A wireless switch according to claim 9 wherein a signal intensity sufficient to activate said function of the pulse meter is obtained by bringing the receiver closer to the transmitter than when effecting actual pulse measurements without said activation.