Pulse meter, frequency analysis device and pulse measuring method
A technology of frequency analysis and measurement method, which is applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, medical science, etc. It can solve the problems of outputting pulse rate for a long time, unable to perform Fourier transform processing, etc., and achieve shortening Effects of measurement time, prevention of reduction in measurement range, and prevention of resolution deterioration
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no. 1 example
[0028] figure 1 is a block diagram showing the configuration of the pulse meter 1 according to the first embodiment. The pulsometer 1 includes a pulse data acquiring unit 100 , a replicating unit 16 , a frequency analyzing unit 17 , and a pulse rate calculating unit 18 . The pulse data acquisition unit 100 may have any configuration as long as it can sequentially acquire sampling data for pulse rate calculation. In the first embodiment, pulse data acquisition unit 100 is realized by a configuration including light emitting device 10 , light emission control unit 11 , photodetector 12 , amplifier 13 , AD converter 14 and buffer 15 .
[0029] For example, the light emitting device 10 is an LED, and emits light under the control of the light emission control unit 11 . In the case of measuring a pulse, the light emitting device 10 emits light toward blood vessels of a person to be measured. Lighting device 10 may include one or more LEDs. As the light to be emitted from the l...
no. 2 example
[0054]Next, a second embodiment will be described. The frequency analysis unit 17 according to the first embodiment performs frequency analysis on the data of the required number of samples every time the sample data of the first data number is acquired. In the second embodiment, whenever a predetermined third number of data less than the first number of data is acquired, the second and subsequent frequency analyzes are performed on a data sequence including the third The latest sample data of the first data number of the sample data of the data number is followed by data obtained by copying only the last obtained sample data of the second data number of the latest sample data of the first data number. Specifically, after acquiring n sampling data, when the pulse data acquiring unit 100 further acquires k (k is a positive integer, and k
no. 3 example
[0063] In the pulsometer 1 according to the first and second embodiments described above, the pulse rate obtained in the first measurement is output only after the first data number of sampling data is accumulated. Therefore, it takes a long time to obtain the output of the pulse rate in the first measurement. In order to solve this problem, in the third embodiment, pulse measurement by a counter system is used in combination with pulse measurement using frequency analysis.
[0064] The term "pulse measurement using a counter system" described herein refers to a method of calculating the pulse rate by detecting the timing when the pulse waveform exceeds a reference value. Figure 11 is a graph schematically showing pulse measurement using a counter system. like Figure 11 As shown in , in pulse measurement using a counter system, each value of sampled data is monitored, and the timing when the value exceeds a predetermined reference value is detected each time. Since the ti...
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