Ballistocardiogram signal cycle calculating method and apparatus

Abstract

The present invention discloses a ballistocardiogram signal cycle calculating method and apparatus. The method comprises: acquiring a ballistocardiogram signal generated by a ballistocardiogram jogging sensor, and quantizing the ballistocardiogram signal to form a energy wave; and calculating an energy wave change cycle, wherein, the energy wave change cycle is the same as a ballistocardiogram cycle. According to the ballistocardiogram signal cycle calculating method and apparatus disclosed by the present invention, the ballistocardiogram signal collected by a jogging sensor is quantized; since energy is neither positive nor negative, when the jogging senser is affected by an interaction between ballistocardiogram and damping, energy of each ballistocardiogram is gradually decreased from a maximum value until the next ballistocardiogram is increased again; and after the ballistocardiogram signal is quantized, a peak and valley of the energy wave can be found accurately; and the energy change wave cycle is obtained through a simple operation, and since the cycle of energy changing is the same as the ballistocardiogram signal cycle, the ballistocardiogram signal sycle can be obtained accurately.

Description

technical field [0001] The invention relates to the field of period calculation of cardiac shock signals, in particular to a calculation method and device for period of cardiac shock signals. Background technique [0002] The micro-motion sensor can sense signals such as respiratory signals and cardiac shock signals. The cardiac shock signals are shown as periodic envelopes, and each envelope means a heartbeat. We can assume that each envelope has a long period of time. The maximum and minimum values ​​of the time are not exceeded, and the extreme values ​​​​all appear in the same phase of the envelope. In this way, we can obtain the heartbeat cycle through a very simple program, but there are two shortcomings: the first is not to be exceeded The time constant determines the measurement range of this method. If it is set to 0.5 seconds, the measurement range is lower than 120 times / min, and this constant cannot be set too small, otherwise the real extreme value in the period...

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Problems solved by technology

[0002] The micro-motion sensor can sense signals such as respiratory signals and cardiac shock signals. The cardiac shock signals are shown as periodic envelopes, and each envelope means a heartbeat. We can assume that each envelope has a long period of time. The maximum and minimum values ​​of the time are not exceeded, and the extreme values ​​​​all appear in the same phase of the envelope. In this way, we can obtain the heartbeat cycle through a very simple program, but there are two shortcomings: the first is not to be exceeded The time constant determines the measurement range of this method. If it is set to 0.5 seconds, the measurement range is lower than 120 times / min, and this constant cannot be set too small, otherwise the real extreme value in the period cannot be locked; the second is that the extreme value cannot be guaranteed. Values ​​always occur at the same phase of the cycle, which does not guarantee accurate cycle-by-cycle measurements

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