Wireless passive flexible sensing device and method for sweat ion detection

A sensor device, wireless passive technology, applied in the field of electrochemical detection, can solve the problems such as the inability to further reduce the volume, the inability to achieve miniaturization, integration and skin-mounted detection, and achieve the effect of simplifying the structure design

Inactive Publication Date: 2019-04-19
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The equipment used in the research has the characteristics of mobility and portability, but due to fundamental factors such as battery power supply and power consumptio

Method used

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  • Wireless passive flexible sensing device and method for sweat ion detection
  • Wireless passive flexible sensing device and method for sweat ion detection
  • Wireless passive flexible sensing device and method for sweat ion detection

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Embodiment

[0114] 1. Design of a wireless passive flexible sensing device for detection of body surface sweat ions:

[0115] The resonant frequency of the NFC antenna 1 of the wireless passive flexible sensor device for sweat ion detection on the body surface is 13.56MHz. This system uses the NFC communication chip NT3H2111 of NXP as the core of the NFC module, which can couple energy through the antenna. And the 3.3V voltage output is modulated by the internal power management module to supply power to all the circuits at the back end. The control system uses Texas Instruments MSP430FR5959 as the main control microcontroller, and according to the basic principle of the potentiometric method, the integrated operational amplifier AD8608 of Analog Devices is selected as the main working device of the ion signal processing circuit. Considering that there is no Negative potential, an appropriate DC voltage bias is added to the op amp input of each channel to ensure that the measured ion volt...

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Abstract

The invention discloses a wireless passive flexible sensing device for sweat ion detection. Sodium ions, potassium ions, hydrogen ions, calcium ions and hydrogen ions in sweat generate an electrochemical reaction on an ion electrode array, response voltage generated through the reaction is transmitted to an ion signal processing circuit through a connector and then sent into a single-chip microcomputer chip to perform on-chip analog-to-digital conversion after being subjected to signal conditioning, data obtained after conversion is transmitted to an NFC chip and a peripheral circuit thereof;a mobile terminal with an NFC module performs wireless data interaction and energy transfer with an NFC antenna and the NFC chip and the peripheral circuit thereof through inductive coupling among antennas, and voltage conversion data containing ion concentration information is read. The whole system does not need a power supply of a battery, an adopted sensor adopts a printing electronic technology to make an electrode detecting the ion concentration machined on a flexible polydimethylsiloxane substrate, flexibility and bending are achieved, and the device has the good working performance andwide application prospects.

Description

technical field [0001] The invention relates to an electrochemical detection technology, in particular to a wireless passive flexible sensing device and method for detecting sweat ions. Background technique [0002] Sweat is a common liquid secreted by the human body surface. It is a relatively complex liquid environment and contains many substances related to the physiological characteristics of the human body. These substances contain a wealth of physiological information, and through the analysis of these substances in sweat, non-invasive monitoring of the state of human exercise and health can be realized. For example, excessive loss of sodium ions and potassium ions in sweat can lead to diseases such as hyponatremia, hypokalemia, muscle cramps, and dehydration; the hydrogen ion concentration (pH) in sweat is also a very important parameter for disease diagnosis, For example, the pH value of type 2 diabetics with kidney stones is lower than that of normal people. Accord...

Claims

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Application Information

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IPC IPC(8): A61B5/145G01N27/26G01N27/48
CPCA61B5/14517A61B5/6802G01N27/26G01N27/48
Inventor 刘清君许刚程晨刘朝阳卢妍利
Owner ZHEJIANG UNIV
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