Generation method of frequency and shape waveforms used for human impedance measuring

Abstract

The invention discloses a generation method of frequency and shape waveforms used for human impedance measuring in the field of bioelectronics measuring. The generation method includes: writing clock frequency division coefficient, frequency division clock cycle period coefficient K and waveform data into a nonvolatile memory through a burning interface; reading out the clock frequency division coefficient and the frequency division clock cycle period coefficient from the nonvolatile memory; using a frequency division clock to read the waveform data from the nonvolatile memory, and outputting the data according to certain rules. By controlling the clock frequency division coefficient and frequency division clock cycle period, frequency and shape of generated waveforms can be adjusted to acquire better testing results of human impedance.

Description

technical field [0001] The invention belongs to the technical field of bioelectronic measurement, in particular to a method for measuring human body impedance. Background technique [0002] Since the study of bioimpedance in connection with human health, the research, measurement methods and equipment related to this aspect have undergone great development. Especially as people pay more attention to their own health, various instruments related to bio-impedance measurement have emerged as the times require. For example, the BC-300 body composition analyzer in the United States, the TBF series civil body weight-body fat measuring instrument of Japan TANITA company, etc. All these measurements involving bioimpedance are based on the AC sine wave as the excitation power to the anthropometric circuit. There is no denying that this approach works. But the circuit of the whole system is quite complex and difficult to simplify. [0003] The principle of human body impedance mea...

AI Technical Summary

Problems solved by technology

However, the above-mentioned method is only to measure the impedance of the human body at a specific frequency and waveform (equal square wave). In fact, during the measurement process, the waveform and frequency need to be adjusted, and the above-mentioned structure is difficult to realize

Images