Time domain analysis is the most widely used analysis method at present. Through the morphological analysis of pulse chart, the functional relationship between fluid parameters in arterial blood vessels and time and space is clarified, so as to understand the frequency and rhythm of pulse, the strength of pulse force, the virtual and real pulse potential and the morphological characteristics of pulse. Frequency domain analysis is a common method to deal with wave information in modern engineering mechanics. It decomposes the pulse wave into a series of simple harmonic vibrations, the frequency of which is an integer multiple of the fundamental frequency, forming a frequency spectrum. Analyze the difference of pulse condition with the difference of frequency spectrum and frequency doubling. Velocity analysis, also known as slope, is the rate of change of intra-arterial pressure, which reflects the changing speed of pulse wave at various points. The ramp wave corresponds to the pulse wave, and the forward wave is an ascending slope, reflecting the rising speed of the pulse wave. Negative wave is the descending slope, which reflects the changing speed of pulse wave descending. Analyzing the change of slope map can reflect the changing trend of various pulse conditions more sensitively. In the early 1980s, Wechsler put forward a multi-factor pulse identification method, which refers to the fuzzy set of various factors of lower sensation. At present, it is considered to be a relatively comprehensive map recognition method that reflects the public opinion of the lower level. Li believes that there are nine fuzzy sets of different senses at the fingertips, which can be summarized into four pulse charts: inch, off and foot. Pulse wave-pulse position trend chart; Pulse waveform diagram; Pulse rate trend chart; Schematic diagram of pulse shape. These four methods are the most commonly used analytical methods at present.
With the continuous development of science and technology, several new analytical methods appear one after another, such as establishing mathematical models. Some pulse charts are not clear, and the boundary between them is not obvious. Therefore, the theory of fluid mechanics and biomechanics is used to describe the pulse condition mathematically, and the mathematical model of pulse wave is established. According to the principle of proximity selection in fuzzy theory, the data are compared to determine the type of pulse condition. Such as nonlinear elastic cavity theory and linearization theory of fluid transient. Autoregressive-moving average model is a signal regression-moving average signal model (ABMA) established through time series analysis. The characteristic parameters of the waveform are extracted, and the ratio of the deviation from the average value in each characteristic parameter to the total deviation from the average value is compared, and then F-test is carried out to determine the discriminant ability for screening, and Bayesian inference is used to find the discriminant function for identification. Computer intelligent analysis, with the popularization of computer application and intelligent technology, people pay more and more attention to it, and people use computers instead of manual processing of various information. This method is to analyze the pulse chart by computer, screen all indexes, pick out the main indexes, and establish discrimination and diagnosis comparison through multi-factor analysis.
The above analysis method of pulse chart is mainly based on modern scientific theory and technology, but it is important that pulse diagnosis in traditional Chinese medicine is based on the "overall concept", and it can not be completed by obtaining a pulse chart and then analyzing a certain waveform. The ancients said, "If you don't know Yi, you can't study medicine, but if you are easy to learn, you can also distinguish diseases.". Therefore, you can't simply touch a pulse, or draw a conclusion by getting a pulse map. Pulse diagnosis mainly distinguishes the zang-fu organs through the ups and downs of nine phases and three parts of the inch mouth, and distinguishes the zang-fu organs through the division of nine phases and three parts of the inch mouth. Even so, in the process of syndrome differentiation, pulse diagnosis still needs to be applied together with looking, smelling and asking, so as to achieve "four diagnoses combined with reference" and avoid misdiagnosis.