A multi-dimensional electrochemical information and multi-spectral information combined measurement method

Abstract

The application discloses a multi-dimensional electrochemical information and multi-spectrum information combined measurement method, and relates to the technical field of electrochemical information and multi-spectrum information measurement. The measurement method comprises the following steps: acquiring surface topography information of a measured object; determining a detection surface of an electrode array in the measured object according to the surface topography information, wherein the distance between the detection surface and the surface of the measured object is a preset depth value; determining electrochemical information of the measured object according to the electrode array at the preset depth value; and simultaneously measuring multi-spectrum information through the preset depth value. The application provides an electrochemical and multi-spectrum information measurement method which can accurately control the detection depth under different temperature conditions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of substance detection, and particularly relates to a multi-dimensional electrochemical information and multi-spectral information combined measurement method. BACKGROUND

[0002] Electrochemical information imaging is a technology of generating an image by electrochemical information distribution inside a measured object. In medicine, compared with computed tomography (CT) and magnetic resonance imaging (MRI), electrochemical information imaging is lower in price and almost harmless to the human body, and therefore has broad application prospects in medicine. Electrochemical information imaging can also be used for on-site measurement in various scenes such as food detection, animal tissue detection, industrial part detection, and material chemical composition detection due to its real-time and fast characteristics.

[0003] Spectral measurement is a measurement method of measuring certain properties of a measured object such as functional group structure and chemical element content by the intensity of scattering and absorption of light of different wavelengths in the object, and has broad applications in the fields of agriculture, astronomy, automobiles, biology, chemistry, coating, colorimetric measurement, environmental detection, film industry, and food.

[0004] However, the existing electrochemical information imaging or spectral measurement method does not have a measurement method of accurately controlling the detection depth at different temperatures. SUMMARY

[0005] In order to overcome the above technical defects, the purpose of the present application is to provide an electrochemical information measurement and multi-spectral information measurement method which can accurately control the detection depth at different temperatures.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] According to one aspect of an embodiment of the present application, an electrochemical information measurement method is provided, applied to an electronic device including an electrode array, and the measurement method includes:

[0008] obtaining surface topography information of a measured object;

[0009] determining a detection surface of the electrode array inside the measured object according to the surface topography information, wherein the distance between the detection surface and the surface of the measured object is a preset depth value;

[0010] determining electrochemical information of the measured object according to the electrode array at the preset depth value;

[0011] determining multi-spectral information of the measured object according to laser emission and receiving light paths at the preset depth value.

[0012] In some embodiments of the present application, the method for obtaining the surface topography information of the measured object comprises: obtaining the surface topography information of the measured object by laser ranging.

[0013] In some embodiments of the present application, the method for determining the electrochemical information of the measured object comprises: determining the electrochemical information of the measured object by an injection current electrical impedance imaging method or an induced current electrical impedance imaging method.

[0014] In some embodiments of the present application, the electrode array comprises an excitation electrode and a detection electrode; and the method for determining the electrochemical information of the measured object by the injection current electrical impedance imaging method comprises:

[0015] applying an excitation electrical signal to the excitation electrode;

[0016] obtaining a response signal to the excitation electrical signal when the detection electrode measures the measured object;

[0017] obtaining an electrochemical information image of the measured object according to the excitation electrical signal and the response signal.

[0018] In some embodiments of the present application, the method for determining the electrochemical information of the measured object by the induced current electrical impedance imaging method comprises:

[0019] previously placing a coil on the surface of the measured object;

[0020] passing an alternating current through the coil, and measuring an eddy current signal of the measured object by a probe of the electrode array;

[0021] obtaining an electrochemical information image of the measured object according to the eddy current signal.

[0022] In some embodiments of the present application, the multi-spectrum information measurement method comprises a Raman spectrum measurement method; and the multi-spectrum measurement method comprises:

[0023] previously setting a laser source, wherein the emission wavelength of the laser source is determined according to actual needs;

[0024] a converging light path focuses the light emitted by the laser source on the surface or inside of the measured object;

[0025] a collecting light path collects scattered light from various angles;

[0026] a spectrometer separates the scattered light in space according to different wavelengths, detects the intensity of the filtered light, and draws a spectrum graph.

[0027] According to an aspect of an embodiment of the present application, there is provided an electrochemical information measurement device, which comprises:

[0028] An acquisition device configured to acquire surface topography information of a measured object;

[0029] A detection surface determination device configured to determine a detection surface of the electrode array inside the measured object according to the surface topography information, wherein the distance between the detection surface and the surface of the measured object is a preset depth value;

[0030] An electrochemical information determination device configured to determine electrochemical information of the measured object according to the electrode array at the preset depth value.

[0031] A multi-channel multi-spectral information determination device configured to perform spectral measurement on the measured object by a preset multi-spectral information measurement method while determining the electrochemical information of the measured object.

[0032] According to an aspect of an embodiment of the present application, a computer readable medium having a computer program stored thereon is provided, the computer program being executed by a processor to implement the measurement method in the above technical solutions.

[0033] According to an aspect of an embodiment of the present application, an electronic device is provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the measurement method in the above technical solutions by executing the executable instructions.

[0034] From the above technical solutions, the present application has at least the following beneficial effects:

[0035] In the technical solution provided by the embodiment of the present application, the surface topography information of the measured object is acquired, and the detection surface of the electrode array inside the measured object is determined. Since the distance between the detection surface and the surface of the measured object is a preset depth value, the depth of insertion of all electrodes in the electrode array into the measured object can be controlled to be the same, the electrochemical information of the measured object can be obtained more accurately, and the multi-spectral information of the object can be measured by the preset depth value. Moreover, the electrochemical information and multi-spectral information combined measurement method can work at different temperatures to obtain the electrochemical information and multi-spectral information of the measured object at different temperatures. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 A flowchart of the electrochemical information measurement method provided by the embodiment of the present application;

[0038] Figure 2 A schematic diagram of the laser ranging to obtain surface topography information of the measured object is provided for the embodiment of the present application;

[0039] Figure 3 A schematic diagram of the electrode array and electrode controller is provided for the embodiment of the present application;

[0040] Figure 4 A schematic diagram in the injected current electrical impedance imaging mode is provided for the embodiment of the present application;

[0041] Figure 5 A schematic diagram in the induced current electrical impedance imaging mode is provided for the embodiment of the present application;

[0042] Figure 6 A Raman spectroscopic imaging schematic diagram is provided for the embodiment of the present application;

[0043] Figure 7 A structural block diagram of the electrochemical information measuring device is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0044] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any

[0045] Moreover, described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0046] The block diagrams in the drawings show only the functionality of the embodiments and do not imply that the functions must be implemented in a particular order. In some embodiments, the functions can be implemented in hardware, software, or a combination of the two. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0047] The flowchart shown in the drawing is only an exemplary illustration, and is not necessarily required to include all the contents and operations / steps, nor is it necessarily required to be executed in the order described. For example, some operations / steps can be further decomposed, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to actual conditions.

[0048] In electrochemical information imaging, electrochemical information at the same depth from the surface of the measured object is more meaningful, but the existing electrochemical information imaging does not have a method for accurately controlling the detection depth.

[0049] The electrochemical information measurement method provided by the embodiment of the present application is applied to an electronic device, and the electronic device includes an electrode array. The electronic device can include a desktop computer, a notebook computer, a smart phone, a personal digital assistant (PDA), a tablet computer, or any other device with a display screen.

[0050] Referring to Figure 1 The electrochemical information measurement method provided by the embodiment of the present application includes steps S10, S20, S30, and S40.

[0051] In step S10, surface topography information of a measured object is acquired.

[0052] In an embodiment, the surface topography information of the measured object is acquired by laser ranging. The electronic device includes a ranging laser array, each laser point in the ranging laser array includes a laser source and a detector, the distance between the laser sources is small enough, and the light spot emitted by the laser source is small enough to ensure the measurement resolution of the surface topography of the measured object.

[0053] As Figure 2 shown, the emission direction of each laser source is perpendicular to the surface of the measured object. The detector receives the reflected light after the light emitted by the laser source irradiates the surface of the measured object. The intensity of the laser source can be modulated, and the laser source emission light signal and the noise light signal are identified through intensity measurement. The distance between each laser source and the surface of the measured object is obtained through the phase change of the laser intensity, that is, the surface topography of the measured object is obtained.

[0054] In step S20, a detection surface of the electrode array inside the measured object is determined according to the surface topography information, wherein the distance between the detection surface and the surface of the measured object is a preset depth value. Since the surface topography of the measured object has been acquired in step S10, the preset depth value of the electrode array inserted into the measured object can be loaded to determine the detection surface of the electrode array inside the measured object. Since the measured object can be food, animal tissue, industrial parts, etc., the preset depth value is determined by the characteristics of the measured object.

[0055] In step S30, the electrochemical information of the measured object is determined according to the electrode array at the preset depth value.

[0056] As shown in Figure 3 , the electronic device comprises an electrode array and an electrode controller, the electrode controller controls each electrode to be connected to excitation or detection, becoming an excitation electrode or a detection electrode; the electrode controller can also control the depth of each electrode on the probe inserted into the measured object. In an embodiment, the electrochemical information of the measured object is determined by an applied current electrical impedance tomography (ACEIT) or an induced current electrical impedance tomography (ICEIT), wherein the electrochemical information includes resistivity and / or conductivity.

[0057] In an embodiment, the electrode array comprises excitation electrodes and detection electrodes; the electrochemical information of the measured object is determined by the applied current electrical impedance tomography, comprising: applying an excitation electrical signal to the excitation electrodes; obtaining a response signal to the excitation electrical signal when the detection electrodes measure the measured object; and obtaining the electrochemical information distribution of the measured object according to the excitation electrical signal and the response signal.

[0058] Specifically, in the mode of applied current electrical impedance tomography, as shown in Figure 3 and Figure 4 , the electrode controller controls each electrode (solid line or dashed line in Figure 3 ) to be connected to excitation or detection, and the electrodes in the electrode array become excitation electrodes or detection electrodes. The excitation electrodes drive control of all electrodes connected to excitation, so that the excitation electrodes can have different excitation modes. The electrode controller can control a part of the electrodes as excitation electrodes to generate excitation signals with adjustable intensity, frequency and phase, and another part of the electrodes as detection electrodes to collect response signals inside the measured object under excitation, and obtain the electrochemical information inside the measured object after processing.

[0059] In an embodiment, the induced current electrical impedance tomography determines the electrochemical information of the measured object, comprising: placing a coil on the surface of the measured object in advance; passing an alternating current through the coil, and the probes of the electrode array measure the eddy current signal of the measured object; and obtaining the electrochemical information distribution of the measured object according to the eddy current signal.

[0060] Specifically, as shown in Figure 3 and Figure 5 , the electrode controller controls each electrode (solid line or dashed line in Figure 3 ) to be connected to excitation or detection, and the electrodes in the electrode array become excitation electrodes or detection electrodes. The excitation electrodes drive control of all electrodes connected to excitation, so that the excitation electrodes can have different excitation modes. The electrode controller can control a part of the electrodes as excitation electrodes to generate excitation signals with adjustable intensity, frequency and phase, and another part of the electrodes as detection electrodes to collect response signals inside the measured object under excitation, and obtain the electrochemical information inside the measured object after processing.As shown, in the inductive current resistance impedance imaging mode, the electrode controller controls all electrodes or part of the electrodes as the detection electrodes. The coil through which the alternating current passes is placed on the surface of the measured object, and the magnetic field generated in the alternating current coil induces eddy current in the interior of the measured object. The eddy current information inside the measured object is measured by the detection electrodes to obtain the electrochemical information inside the measured object.

[0061] In step S40, while determining the electrochemical information of the measured object, multi-spectral information measurement can also be performed. The multi-spectral information includes Raman spectrum, resonance absorption spectrum, etc.

[0062] In an embodiment, the multi-spectral information measurement method includes a Raman spectrum measurement method. The Raman spectrum measurement method includes: pre-setting a laser source, wherein the emission wavelength of the laser source is adapted to the measured object; a condensing light path focuses the light emitted by the laser source on the surface or interior of the measured object; a collection light path collects scattered light from various angles; a spectrometer separates the scattered light in space according to different wavelengths, detects the intensity of the filtered light, and draws a Raman spectrum graph.

[0063] Specifically, the Raman spectrum is a kind of scattering spectrum. The phenomenon that the frequency of scattered light changes after the light is scattered by molecules is called Raman scattering. The scattering light with the same frequency as the incident light is called Rayleigh scattering, and the spectrum lines υ0±υ1 symmetrically distributed on both sides of the incident frequency υ0 are called Raman scattering. The smaller frequency is Stokes scattering, and the larger frequency is anti-Stokes scattering. The spectrum lines close to the Rayleigh scattering line on both sides are called small Raman spectrum, and the spectrum lines appearing far away from the Rayleigh line on both sides are called large Raman spectrum. The small Raman spectrum is related to the rotational energy level of the molecule, and the large Raman spectrum is related to the vibration-rotational energy level of the molecule. The theoretical explanation of the Raman spectrum is that the incident photons and the molecules are inelastic scattering, the molecules absorb photons with a frequency of υ0, emit photons with a frequency of υ0-υ1, and at the same time, the molecules jump from a low energy state to a high energy state (Stokes scattering); the molecules release photons with a frequency of υ0, emit photons with a frequency of υ0+υ1, and at the same time, the molecules jump from a high energy state to a low energy state (anti-Stokes scattering). The Raman spectrum has great application value in the field characterization of material composition in physical, chemical and medical research.

[0064] In an embodiment, the Raman spectrum measurement includes the following steps: providing a laser source, a condensing light path, a collection light path and a spectrometer. The laser source can be different from the laser source used in the laser ranging part, and the emission wavelength can be selected according to the measured object. The condensing light path focuses the light emitted by the laser source on the surface or interior of the measured object, the collection light path collects scattered light from various angles, and the spectrometer separates the scattered light in space according to different wavelengths, detects the intensity of the filtered light, and draws a Raman spectrum graph. For example, Figure 6The Raman spectrum imaging schematic diagram shown in the figure, the multi-spectrum light source emits light of suitable wavelength to the incident optical fiber, and the scattered light is collected by the scattered light optical fiber into the multi-channel spectrometer for filtering and amplification, and then the spectrum is measured. The optical fiber is connected to each group of electrodes, and the optical fiber is inserted into the inside of the measured object with the probe. While determining the electrochemical information of the measured object, the measured object is measured by a preset multi-channel multi-spectrum information measurement method, and electrochemical and spectral information synchronous measurement is provided, and the method is more accurate.

[0065] Next, the embodiment will be further described in combination with the specific implementation process:

[0066] Taking the measured object as a meat block as an example, the meat is placed under the laser array as shown in the figure, the surface of the meat block is irradiated by the laser array, and then the time difference between the reflected laser signals is obtained to obtain the surface topography information of each position of the meat. Figure 2

[0067] When it is necessary to measure the electrochemical information of the meat block at a certain depth from the surface, the depth of the electrode insertion can be controlled by the known surface topography information, and the surface topography information at a certain depth is measured. When the electrochemical information to be measured is determined, the electrode controller can control the electrode to be an excitation electrode or a detection electrode.

[0068] If injection current impedance imaging is performed, the excitation electrode and the detection electrode need to be designed, a part of the electrodes are excitation electrodes, and a part are detection electrodes. The excitation electrode generates a specific signal, and the detection electrode detects the response of the meat block to the excitation signal to determine the electrochemical information of the meat block, as shown in the figure. Figure 4 Figure 5 If inductive current impedance imaging is performed, all the electrodes need to be designed as detection electrodes, and then the coil is placed on the other side of the meat to excite the inductive current. The detection electrode detects the inductive current signal generated in the meat to determine the electrochemical information of the meat, as shown in the figure. Figure 6

[0069] According to one aspect of an embodiment of the present application, an electrochemical information measurement device 100 is provided, as shown in the figure. The measurement device 100 comprises: Figure 7 An acquisition device 110 configured to acquire surface topography information of a measured object;

[0070] A detection surface determination device 120 configured to determine a detection surface of the electrode array in the measured object according to the surface topography information, wherein the distance between the detection surface and the surface of the measured object is a preset depth value;

[0071]

[0072] ​​​​The electrochemical information determination device 130 is configured to determine the electrochemical information of the measured object according to the electrode array at a preset depth value.

[0073] The multi-channel multi-spectral information determination device 140 is configured to determine the electrochemical information of the measured object while performing spectral measurement on the measured object by a preset multi-channel multi-spectral information measurement method.

[0074] The embodiments of the present application also provide an electronic device, which comprises a processor and a memory. The memory is configured to store a computer program; and the processor is configured to execute the computer program and implement any one of the electrochemical information measurement methods provided by the embodiments of the present application when the computer program is executed.

[0075] It should be understood that the processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0076] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for measuring multidimensional electrochemical and multispectral information, characterized in that: This measurement method uses an electrochemical information measurement device to perform spectral measurements on the analyte. The method measures electrochemical and multispectral information at different depths of the analyte at different temperatures. It is applied to an electronic device, which includes an electrode array. The measurement device includes: The acquisition device is configured to acquire surface morphology information of the object being measured. A detection surface determination device is configured to determine the detection surface of the electrode array inside the object under test based on the surface morphology information, wherein the distance between the detection surface and the surface of the object under test is a preset depth value. An electrochemical information determining device is configured to determine the electrochemical information of the analyte based on the electrode array at a preset depth value. A multi-channel multispectral information determination device is configured to determine the electrochemical information of the analyte while simultaneously performing spectral measurements on the analyte using a preset multispectral information measurement method. The measurement method includes: Acquire surface morphology information of the object being tested; Based on the surface morphology information, the detection surface of the electrode array inside the object under test is determined, wherein the distance between the detection surface and the surface of the object under test is a preset depth value; Based on the electrode array at a preset depth value, the electrochemical information of the analyte is determined; determining the electrochemical information of the analyte includes: determining the electrochemical information of the analyte by an injection current impedance imaging method or an inductive current impedance imaging method; the inductive current impedance imaging method for determining the electrochemical information of the analyte includes: A coil is placed on the surface of the object being measured beforehand; When an alternating current is passed through the coil, the probes of the electrode array measure the eddy current signal of the object under test. The electrochemical information image of the analyte is obtained based on the eddy current signal; The electrode array includes an excitation electrode and a detection electrode; the determination of the electrochemical information of the analyte by the injected current impedance imaging method includes: An excitation electrical signal is applied to the excitation electrode; When the probe electrode measures the object under test, it acquires a response signal to the excitation electrical signal; Based on the excitation electrical signal and the response signal, an electrochemical information image of the analyte is obtained; the multispectral information measurement method includes: A laser source is pre-set, wherein the emission wavelength of the laser source is determined according to the actual application. The focusing optical path focuses the light emitted by the laser source onto the surface or interior of the object being measured. The light-collecting path gathers scattered light from various angles; The spectrometer separates the scattered light in space according to different wavelengths, and after filtering, detects the intensity of the light and plots a spectrum.

2. The measurement method according to claim 1, characterized in that: The acquisition of the surface morphology information of the object under test includes: acquiring the surface morphology information of the object under test through laser ranging.

3. A computer-readable medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the measurement method as described in claim 1 or 2.

4. An electronic device, characterized in that... include: processor; as well as A memory for storing executable instructions of the processor; wherein the processor is configured to perform the measurement method as described in claim 1 or 2 by executing the executable instructions.

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