CN210775318U - Flexible three-electrode sodium ion detection device - Google Patents

Abstract

The utility model discloses a flexible three-electrode sodium ion detection device, which comprises a flexible three-electrode sodium ion detection sensor, a signal processing module, a data display module and a power supply module. The flexible three-electrode sodium ion detection sensor forms an equivalent resistance linearly related to the concentration of sodium ions, and can output detection signals corresponding to different concentrations of sodium ions; the signal processing module is composed of a Venturi oscillation conversion circuit and a waveform shaping circuit, which can convert The detection signal is converted into a sine wave, and then the sine wave is converted into a square wave signal; the data display module consists of a single-chip microcomputer and a mobile terminal. The single-chip microcomputer is equipped with a digital tube display circuit and a Bluetooth data transmission circuit, which can convert the frequency of the square wave signal to the corresponding The sodium ion concentration is displayed on the nixie tube and mobile terminal. The utility model prepares electrodes on a flexible substrate (preferably but not limited to polyethylene terephthalate plastic PET), and has the advantages of low manufacturing cost, light weight and high sensitivity.

Description

A flexible three-electrode sodium ion detection device

technical field

The utility model relates to electronic equipment for detecting sodium ion content, in particular to a flexible three-electrode sodium ion detecting device.

Background technique

The intake of sodium ions is of great significance to the maintenance of normal physiological functions of the human body, but the intake of sodium ions should not be too much. The World Health Organization recommends that the daily intake of sodium ions should not exceed 1700 mg. Excessive intake of sodium ions It will have adverse effects on human metabolism and other aspects. Therefore, it is necessary to monitor the intake of sodium ions. The flexible sodium ion detection system is convenient for monitoring the daily intake of sodium ions by the human body, and displays real-time data on the mobile terminal (mobile phone) through the Bluetooth module to avoid excessive or insufficient intake of sodium ions. Help people live healthier lives.

The application number is CN 201410606969.3, and the name of the invention is a sodium ion sensor and a manufacturing method thereof. The sodium ion sensor uses a circuit composed of a substrate, a first sodium ion selective electrode, a second sodium ion selective electrode and a salt bridge to identify sodium ions . The application number is CN 201010193003.3, and the name of the invention is an all-solid-state potassium ion sensor and its preparation method, which use a substrate, a potassium ion selective electrode and an external reference electrode to detect potassium ions. In the existing technical solutions for ion detection, the detection of metal ions is mainly realized by preparing ion-selective electrodes. There are few types of detection sensors for sodium ions, and the concentration of sodium ions cannot be quantitatively determined. In addition, the current sodium ion detection device has a complex structure, cannot display the concentration of sodium ions in the measured solution at the same time, and the data display is not intuitive. More importantly, there is currently a lack of a flexible sodium ion detection device on the market.

Utility model content

The purpose of the utility model is to provide a flexible three-electrode sodium ion detection device, which can detect the sodium ion content in real time and complete the display of detection data. The flexible three-electrode sodium ion detection sensor in the device constitutes an equivalent resistance whose resistance value can change with the change of the sodium ion concentration to be measured, and transmits the detection signal to the signal processing module; the signal processing module converts the input signal into square The wave signal is transmitted to the data display module; the data display module converts the square wave signal into the concentration value of the sodium ion solution to be tested, and displays it on the digital tube and mobile terminal to complete the analysis and display of the data; the power supply module is a flexible three-electrode Power supply for sodium ion sensor, signal processing module and data display module.

The concrete technical scheme that realizes the purpose of the present utility model is:

A flexible three-electrode sodium ion detection device is characterized in that: the device comprises a flexible three-electrode sodium ion detection sensor, a signal processing module, a data display module, and a power supply module, the flexible three-electrode sodium ion detection sensor, a signal processing module, a data The display modules are connected in sequence, and the power supply module is respectively connected with the flexible three-electrode sodium ion detection sensor, the signal processing module and the data display module; wherein:

The three-electrode sodium ion detection sensor uses a flexible material as a substrate, the thickness of the substrate is 40-60 microns, and a three-electrode sodium ion detection circuit is arranged on the substrate;

The signal processing module includes a Wien oscillation circuit and a waveform shaping circuit, and the Wien oscillation circuit is connected with the waveform shaping circuit;

The data display module is composed of a single-chip microcomputer and a mobile terminal. The single-chip microcomputer is equipped with a digital tube display circuit and a bluetooth data transmission circuit; and a digital-to-analog conversion module is arranged in the single-chip microcomputer.

The three-electrode sodium ion detection circuit is composed of a wire, a left electrode, a right electrode and a middle electrode. The connection method is as follows: on the flexible substrate, the left, middle and right electrodes are placed in parallel at a distance in sequence, and the middle electrode and the left electrode are placed in parallel. The right electrode forms two current loops through the sodium ion solution, forming two equivalent resistances. The resistance value of the equivalent resistance will change with the concentration of sodium ions, so that the three-electrode sodium ion detection circuit can produce detection corresponding to different concentrations of sodium ions. Signal, one end of the middle electrode is connected to the power supply module through a wire, one end of the left electrode and the right electrode is connected to each other, and the other end is connected to the input end of the Venturi oscillator circuit in the signal processing module.

The Venturi oscillator circuit converts the detection signal input by the three-electrode sodium ion detection sensor into a sine wave signal, and then transmits the sine wave signal to the input end of the waveform shaping circuit.

The waveform shaping circuit converts the sine wave signal output by the Wien oscillating circuit into a square wave signal, and the output end of the waveform shaping circuit is connected with the single-chip signal input serial port in the data display module, so that the single-chip computer can use the square wave signal to complete data analysis and analysis. show.

The flexible material is PET, PDMS, PI or PEN (preferably but not limited to polyethylene terephthalate plastic PET).

The beneficial effects of the present utility model:

The utility model has a simple structure, and only uses the linear relationship between the sodium ion concentration and the circuit equivalent resistance to prepare a flexible three-electrode sodium ion detection sensor. The oral skin or tooth surface is easy to carry, and the user can more conveniently detect the sodium ion content in the food. The utility model can also complete the real-time data display on the mobile terminal through the equipped Bluetooth module.

Description of drawings

Fig. 1 is the structural block diagram of the utility model;

2 is a schematic structural diagram of a flexible three-electrode sodium ion detection sensor of the present invention;

FIG. 3 is a graph showing the relationship between the equivalent parallel resistance value and the sodium ion concentration formed by the three-electrode sodium ion detection circuit.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

Example

Referring to FIG. 1, the present utility model includes a flexible three-electrode sodium ion detection sensor 1, a signal processing module 2, a data display module 3 and a power supply module 4, a flexible three-electrode sodium ion detection sensor 1, a signal processing module 2, and a data display module 3 in sequence. The power supply module 4 is respectively connected to the flexible three-electrode sodium ion detection sensor 1 , the signal processing module 2 and the data display module 3 . Among them, the signal processing module 2 includes a Venturi oscillator circuit 5 and a waveform shaping circuit 6; the data display module 3 includes a single-chip microcomputer 7 and a mobile terminal 8, and the single-chip microcomputer 7 is equipped with a digital tube display circuit 9 and a Bluetooth data transmission circuit 10; Equipped with a digital-to-analog conversion module.

Referring to FIG. 2, the flexible three-electrode sodium ion detection sensor of the present invention is composed of a flexible substrate 11 (preferably but not limited to polyethylene terephthalate plastic PET), a left electrode 12 (preferably but not limited to a silver electrode), a right electrode 13 (preferably but not limited to silver electrodes), intermediate electrode 14 (preferably but not limited to silver electrodes), lead 15 , lead 16 , lead 17 , and lead 18 . The flexible substrate 11 is placed on the bottom layer, and the left electrode 12 , the middle electrode 14 , and the right electrode 13 are placed in parallel on the flexible substrate in sequence at a distance, and the left and right electrodes are connected by wires 15 . The other end of the middle electrode 14 is connected to the power supply module through a wire 16; the other ends of the left electrode 12 and the right electrode 13 are respectively connected to the signal processing module through a wire 17 and a wire 18 to complete the initial data acquisition.

The working process of the utility model is as follows:

The flexible three-electrode sodium ion detection sensor is immersed in the sodium ion solution to be detected, so that the middle electrode and the left and right electrodes are connected through the sodium ion solution to form an equivalent resistance, and the equivalent resistance value can vary with the sodium ion solution to be measured. The concentration of the ions changes, thereby changing the detection signal; the detection signal is input into the Wien oscillating circuit in the signal processing module through the wire between the left and right electrodes and the signal processing module, and is processed into a sine wave signal and transmitted to the waveform shaping circuit; The waveform shaping circuit converts the input sine wave signal into a square wave signal, and transmits it to the single chip microcomputer in the data display module through the data receiving serial port. The sodium ion concentration value in the sodium ion solution to be tested is obtained through the digital-to-analog conversion module, and the sodium ion concentration can be displayed on the digital tube display circuit mounted on the single-chip microcomputer. The sodium ion concentration data can be wirelessly transmitted through the Bluetooth data transmission circuit mounted on the single-chip microcomputer. To the mobile terminal, the detection and data display of the sodium ion solution to be tested are completed.

Referring to FIG. 3, the middle electrode and the left and right electrodes of the flexible three-electrode sodium ion detection sensor of the present invention are connected through the sodium ion solution and constitute two equivalent resistances whose resistance values change with the concentration of sodium ions. There is an obvious linear relationship between the equivalent parallel resistance Rw of the resistor and the concentration of sodium ions. The equivalent parallel resistance Rw was tested for four times when the sodium ion concentration was 6‰, 12‰, and 18‰, which were marked as control group 1-control group 4, and the equivalent parallel resistance Rw was measured according to the measured data. The resistance value is plotted on the vertical axis, and the sodium ion concentration S‰ is plotted on the horizontal axis. It can be seen from Figure 3 that when the sodium ion concentration in the solution increases, the parallel equivalent resistance Rw decreases, and the parallel equivalent resistance value has a good linear relationship with the sodium ion concentration. The equivalent parallel resistance value Rw and linearity can be used. relationship to obtain the corresponding sodium ion concentration in the solution to be tested.

Claims (4)

1. A flexible three-electrode sodium ion detection device is characterized by comprising a flexible three-electrode sodium ion detection sensor, a signal processing module, a data display module and a power supply module, wherein the flexible three-electrode sodium ion detection sensor, the signal processing module and the data display module are sequentially connected, and the power supply module is respectively connected with the flexible three-electrode sodium ion detection sensor, the signal processing module and the data display module; wherein:

the three-electrode sodium ion detection sensor takes a flexible material as a substrate, and a three-electrode sodium ion detection circuit is arranged on the substrate; wherein the thickness of the substrate is 40-60 microns;

the signal processing module comprises a Venturi oscillation circuit and a waveform shaping circuit, and the Venturi oscillation circuit is connected with the waveform shaping circuit;

the data display module consists of a single chip microcomputer and a mobile terminal, and the single chip microcomputer is provided with a nixie tube display circuit and a Bluetooth data transmitting circuit; a digital-to-analog conversion module is arranged in the singlechip.

2. The flexible three-electrode sodium ion detection device according to claim 1, wherein the three-electrode sodium ion detection circuit is composed of a lead, a left electrode, a right electrode and a middle electrode, the left electrode and the right electrode respectively form two current loops through sodium ion solution to form two equivalent resistors, one end of the middle electrode is connected with the power supply module through the lead, one ends of the left electrode and the right electrode are connected with each other, and the other end of the middle electrode is connected with an input end of a Venturi oscillation circuit in the signal processing module.

3. The flexible three-electrode sodium ion detection device according to claim 1, wherein an output end of the Venturi oscillation circuit is connected with an input end of the waveform shaping circuit.

4. The flexible three-electrode sodium ion detection device according to claim 1, wherein an output end of the waveform shaping circuit is connected with a signal input serial port of a single chip microcomputer in the data display module.

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