Abstract: The invention relates to a charging method and a charging arrangement for a measuring system which measures the heart rate. The functional unit of the measuring system comprises at least a transmitter unit (100) and/or a receiver unit. The charging arrangement comprises a charging unit (340). The charging coil (320) of the charging unit is arranged to transfer electric energy inductively to the power source (302) of the functional unit (100) via an induction coil (310). The induction coil (130) of the functional unit (100) used for charging is connectable to more than one inductively active function in addition to charging.

Abstract: The present invention relates to a method and an apparatus for determining exertion levels in fitness or athletic training and for determining the stress caused by training. According to the invention, the ECG signal of a person and the timing moment of at least one waveform of the ECG signal, for instance the QRS complex, are measured by means of a heartbeat rate monitor during a training period. The heartbeat rate is calculated on the basis of corresponding ECG signal waveform distances, and a value proportional to the magnitude of the heartbeat rate variation or to that of a total or partial power of a spectrum derived from the heartbeat rate is provided by means of a mathematical function. Those exertion levels of the person which are essential as regards to training period or the stress caused by the training in relation to the exertion levels are determined on the basis of the heartbeat rate variation.

Abstract: The present invention relates to a method and apparatus in connection with measuring the heartbeat rate of a person. In the method, the ECG signal of the person and the timing moment of at least one ECG signal waveform, such as the QRS complex, are measured with a heartbeat rate monitor. The average heartbeat rate frequency of the heartbeat rate is calculated from the ECG signal. Heartbeat rate variation information proportional to the magnitude of the heartbeat rate variation or to that of the total or partial power of a spectrum derived from the heartbeat rate is provided by means of a mathematical function. The heartbeat rate variation information is displayed on the display of the heartbeat rate monitor together with the average heartbeat rate frequency.

Abstract: The invention relates to a method and apparatus for determining the internal temperature and the coefficient of internal thermal conductivity of a structure. In both cases, the surface temperature and ambient temperature of an object are measured from both sides of two structures whose thermal conductivities are known. On the basis of the measured temperature values, the internal temperature or the coefficient of internal thermal conductivity of the object is determined from the function of the heat flux. Thereafter the unknown thermal conductivity or the unknown internal temperature of the object is eliminated from the solutions, and the internal temperature or the coefficient of internal thermal conductivity of the object is determined on the basis of the combined solution.

Abstract: The invention relates to a method and a device for determining threshold values for a person's energy metabolism. A testee is subjected to a gradually increasing stress in order to obtain the threshold values for his energy metabolism. The pulse rate of the testee is measured during the performance, the pulse shape of an ECG signal caused by the pulse is analyzed in order to determine the timing point of the ECG signal corresponding to each pulsation and in order to determine the intervals between the timing points of success of ECG signals. The respiratory frequency of the testee is calculated on the basis on the variations in the intervals between the timing points of the ECG signals.

Abstract: A method of interference-tolerant heartbeat measurement comprises the steps of measuring the person's heartbeat signal at a suitable part of the body and transmitting the signal by telemetric transmission from a transmitter to a receiver as a pulse message formed by successive measuring pulses. A transmission interval of at least some pulse signals is proportional to the person's measured heartbeat rate. Each measuring pulse is formed of at least two identification pulses (C1 and C2), whereby the time interval (t.sub.x) between the identification pulses corresponds to a specific time interval determined for each transmitter-receiver pair, on the basis of which specific interval the receiver identifies the pulse signals intended for itself.

Abstract: A mobile station, i.e., mobile phone included in a cellular telephone system processes paging messages using a dual-port RAM memory connected between a signal processor (DSP) and a microprocessor (MCU). The paging message received and coded by the signal processor is transferred to the RAM memory, the identity number contained by the paging message is compared with the identity number of the microprocessor at the same time in the signal processor and only when they are congruent, the microprocessor is activated through a separate interrupt line. Because most paging messages are either empty messages or intended for other mobile stations, the microprocessor (MCU) can remain on as low a power level as possible during the paging of messages while the mobile station is in the stand-by state.

Abstract: The invention provides an improved method and apparatus for identifying a bad GSM speech frame. Both the estimated signal-to-noise ratio (ESNR) of the received signal and the pseudo bit error rate (PBER) of a recorded speech signal are used to determine whether or not a speech frame is bad.