Graphene capacitor microarray-based flexible pulse condition detection probe

Abstract

The invention belongs to the field of biomedical detection instruments, and mainly relates to a pulse condition detection device. The pulse condition detection device comprises a probe rigid body, a flexible silica gel pad, a pressure sensing flexible thin film, and a fastener and an elastic connecting piece for fixing the pressure sensing flexible thin film, wherein a planar end of the flexible silica gel pad is closely adhered to the probe rigid body; the pressure sensing flexible thin film consists of a graphene capacitor microarray flexible thin film, and the bottom layer of the pressure sensing flexible thin film is closely attached to a cambered surface of the flexible silica gel pad; the two ends of the pressure sensing thin film are fixedly arranged on the two sides of the probe rigid body by the fastener and the elastic connecting piece respectively, one end is closely fixed, and the other end can shrink with pressure change of the contact surface. According to the pulse condition detection probe, the spatial resolution of the pulse condition information is obviously improved, the pressure range of the pulse condition detection probe is expanded to enable that the upper limit value of the pulse condition detection probe reaches 2.5 kilogram force, the stability and the durability of the pulse condition detection probe are improved, and the structural feature of the device realizes a function of simulating the finger pulp of a doctor better.

Description

technical field [0001] The invention belongs to the field of biomedical detection instruments, and mainly relates to a pulse condition detection device. technical background [0002] Pulse diagnosis is one of the most important and most distinctive diagnostic methods in traditional Chinese medicine. It is an important basis for TCM syndrome differentiation and has extremely important significance in TCM clinical diagnosis. Since the 1950s, Chinese scientific and technological workers have devoted themselves to the study of the objectification of pulse diagnosis, exploring the essential characteristics of pulse conditions, and conducting analysis and research by establishing characteristic models, constructing hemodynamic equations, and drawing pulse condition diagrams. Some beneficial results have been obtained in the formation mechanism of pulse condition and its physiological and pathological significance. [0003] The pulse carries a wealth of information about the healt...

AI Technical Summary

Problems solved by technology

[0004] For more than 20 years, the development of pulse condition detection equipment has made technological progress in many aspects, but no substantial breakthrough has been made in the core technical indicators, and there are still some serious deficiencies and problems in general. The spatial resolution is too low, and the amount of pulse information collected is seriously insufficient, resulting in insufficient detection accuracy for pulse length, pulse width, fluency, tension and other indicators

At present, most pulse conditioners are single-contact type, which can only collect one signal at a certain part of inch, close and ruler. This type of equipment cannot detect pulse width and pulse length at all; although there are some array-type pulse condition detection probes It can collect multiple signals at the same time, but either because of its low integration, or because of the inherent mechanical or electromagnetic characteristics of its core material, the number of pressure sensitive units distributed in the horizontal and vertical directions of a single probe is still limited, and its pulse The spatial resolution of the information is greater than 1.5mm

For example, pulse detection equipment with patent application numbers 201010508173.6, 200610119382.5, and 200820075107.2 has a spatial resolution greater than or equal to 2 mm. If it is designed according to the minimum requirements for pulse diagnosis in traditional Chinese medicine, at least 45 signals are needed, and the above three sensors need at least 90. If the data line is designed according to 100 channels, 200 data lines are required. With so many data lines, it is difficult to make the total volume of the sensor small, and it also brings other problems such as stability.

Clinical experiments have shown that if the spatial resolution of the pulse detection probe is greater than 0.8mm, the detection accuracy of the system for pulse length and pulse width is too low, which makes it useful for some pulse types with important clinical diagnostic value (such as fine pulse, Confucian pulse, Micropulse, weak pulse, leather vein, sputum vein, tight pulse, etc.) are often too low in accuracy and easily lead to misdiagnosis

These factors restrict the popularization and application of pulse condition detection equipment

[0005] Second, the stability and durability of the sensor are low

Most of the existing array-type pulse detection probes are composed of separate pressure-sensitive units with independent structures through mechanical connection parts. Because the structure is too complicated and fine, the connection is fragile, and its stability, impact resistance and durability are biased. Low, some array sensors (such as PVDF film sensors) have better stability, but the resolution is too low to adapt to the real clinical environment

[0006] Third, the pressure range of the pulse detection probe is insufficient (usually between 0 and 1 kgf), which is sometimes difficult to meet actual needs

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