Soft capacitive pressure sensors

A pressure sensor, sensor technology, applied in pressure sensor, mechanical mode conversion, cardiac catheterization, etc., can solve the problem of insufficient dynamic range of pressure sensor

Pending Publication Date: 2021-09-03
RGT UNIV OF CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these changes are small and may indicate that the dynamic range of the pressure sensor is insufficient for applanation tonometry

Method used

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Embodiment Construction

[0060] The following is a list of elements that correspond to the specific elements referred to herein:

[0061] 100 capacitive pressure sensor

[0062] 110 first electrode layer

[0063] 120 second electrode layer

[0064] 112, 122 Elastomer layers

[0065] 114, 124 conductive film

[0066] 125 ridge

[0067] 30 dielectric layer

[0068] 140 air gap

[0069] see Figures 1A-1B , in certain embodiments, the present invention has a capacitive pressure sensor (100). The sensor (100) may include a first electrode layer (110), a second electrode layer (120), and a dielectric layer (130) juxtaposed between the first and second electrode layers (110, 120). When the sensor (100) is in the Figure 1A In the rest configuration shown, an air gap (140) is provided between the first electrode layer (110) and the second electrode layer (120). The air gap (140) may serve as a second dielectric layer. In a preferred embodiment, the sensor (100) is bendable, compressible and flexib...

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Abstract

Soft capacitive pressure sensors for continuous wearable health monitoring applications are described herein. Wrinkled gold thin films on elastomeric substrates are used as robust parallel plate electrodes to create a robust integration with the polymer, allowing repeated normal force to deform the thin film without failure. By incorporating micro-ridged structures that support the counter electrodes to create air cavities within the elastomeric dielectric layer, pressure sensitivity is further increased. The pressure sensors are configured to measure human physiological signals such as pressure exerted from a radial pulse on a skin's surface. The radial pulse pressure detected by the sensor can be correlated to an arterial blood pressure. Calibration of said pressure sensors using a neural network allows for determination of absolute blood pressure.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 757,329, filed November 08, 2018, and U.S. Provisional Application No. 62 / 875,418, filed July 17, 2019, the specifications of which are incorporated by reference in their entirety This article. technical field [0003] The present invention relates to medical equipment for blood pressure reading. More specifically, the present invention relates to flexible and stretchable capacitance-based pressure sensors for continuous wearable health monitoring applications. Furthermore, the invention also relates to the calibration of neural networks of pressure sensors for continuous pressure readings. Background technique [0004] Arterial pulses contain a wealth of cardiovascular information, including systolic and diastolic blood pressures that have been used clinically to quantitatively assess and monitor cardiovascular disease as well as general hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01A61B5/021
CPCA61B5/02125A61B5/02108A61B2562/0247
Inventor 米歇尔·基纳乔舒亚·基姆格雷戈里·华盛顿西伦·弗雷德里克·李·史密斯弗洛兰·塔瓦索·埃林顿约瑟夫·加西亚
Owner RGT UNIV OF CALIFORNIA
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