Material quality multi-parameter detection method and device based on interdigital electrode sensor

Abstract

The invention relates to the technical field of material quality detection of food and the like, in particular to a material quality multi-parameter detection method and device based on an interdigital electrode sensor, and the method comprises the steps: enabling a force loading mechanism to execute periodic motion, enabling the interdigital electrode sensor to make contact with, extrude and loosen a detected object, and enabling the interdigital electrode sensor to comprise an interdigital electrode pair; the detector has an electrical impedance detection mode and a triboelectric detection mode; the method comprises the following steps: acquiring an electrical impedance signal of a detected object based on an electrical impedance detection mode and a frictional electrical signal of the detected object based on a frictional electrical detection mode in the process of contacting, extruding and loosening the detected object by using an interdigital electrode sensor, and analyzing the signals to obtain multi-parameter information of the detected object, thereby determining the material quality of the detected object. Therefore, the problems that the detection accuracy is low, the food quality cannot be comprehensively reflected, the comprehensiveness and accuracy of material quality detection are reduced and the like due to the fact that the related technology is high in cost or less in provided information and prone to being influenced by the environment are solved.

Description

Technical Field

[0001] The present application relates to the technical field of material quality detection, and in particular to a material quality multi-parameter detection method and device based on an interdigital electrode sensor. Background Art

[0002] In the food industry and agricultural production, it is very important to identify and authenticate the state and quality of specific objects. For example, in the production of fermented wine, the bone strength, viscosity, and water content of the lees are tested; in the processing of fermented tea, the degree of fermentation, shape, and tenderness of the tea are tested; in the meat processing process, the freshness, water content, and quality of the meat are tested; in the agricultural production and picking process, the maturity, water content, and sugar content of fruits and vegetables are tested. At present, most of these identifications are achieved through human senses, which have problems such as high dependence on experience and subjective judgment, low efficiency, and differences between different testers. It is very necessary to use modern testing technology to realize the automation, digitization, and intelligence of the identification and authentication of the quality of raw materials and processed products in the food industry and agricultural production process.

[0003] With the development of detection technology, some technologies have emerged for identifying the quality of specific objects in food industry and agricultural production, including spectral analysis, conductivity / dielectric constant measurement, texture analysis, etc. Among them, spectral analysis technology can realize multi-parameter detection of components based on the absorption and reflection characteristics of the object under test for light of different wavelengths; conductivity / dielectric constant measurement can detect the moisture content, maturity and other related characteristics of the object; texture analysis technology evaluates the mechanical properties of materials by applying force, including hardness, elasticity, etc.

[0004] However, the related technologies are costly or provide little information, and are easily affected by the external environment, which reduces the accuracy of detection. In addition, conductivity / dielectric constant measurement can only detect the moisture content or maturity of the object, and cannot fully reflect the quality of the food, which reduces the comprehensiveness and accuracy of material quality detection and needs to be solved urgently. Summary of the invention

[0005] The present application provides a method and device for multi-parameter detection of material quality based on interdigital electrode sensors to solve the problems that the related technologies are high in cost or provide little information, and are easily affected by the external environment, resulting in low detection accuracy, inability to fully reflect the quality of food, and reduced comprehensiveness and accuracy of material quality detection.

[0006] The first aspect of the present application provides a multi-parameter detection method for material quality based on a forked electrode sensor, wherein the force loading mechanism is provided with a forked electrode sensor, and the multi-parameter detection method for material quality based on the forked electrode sensor comprises the following steps: the force loading mechanism is subjected to periodic motion so that the forked electrode sensor contacts, squeezes, and releases the object to be measured, wherein the forked electrode sensor comprises a forked electrode pair and has an electrical impedance detection mode and a friction electric detection mode; the forked electrode sensor is used to obtain an electrical impedance signal based on the electrical impedance detection mode and a friction electric signal based on the friction electric detection mode of the object to be measured during the process of contacting, squeezing, and releasing the object to be measured; the electrical impedance signal and the friction electric signal are analyzed to obtain multi-parameter information of the object to be measured, and the material quality of the object to be measured is determined using the multi-parameter information.

[0007] Optionally, in one embodiment of the present application, the use of the interdigital electrode sensor to obtain the electrical impedance signal of the object under test based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing, and releasing the object under test includes: during the periodic motion of the force loading mechanism, the interdigital electrode sensor alternately switches between the electrical impedance detection mode and the friction electric detection mode to obtain the electrical impedance signal and the friction electric signal of the object under test collected by the interdigital electrode sensor during the periodic motion.

[0008] Optionally, in one embodiment of the present application, the analyzing the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the object under test, and using the multi-parameter information to determine the material quality of the object under test, includes: analyzing the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the object under test, wherein the multi-parameter information includes mechanical information, internal component information and surface information, the mechanical information includes the compressibility, resilience and softness of the object under test; the internal component information includes the water content, material and other components of the object under test that affect the electrical impedance and triboelectricity of the object under test; the surface information includes the surface viscosity, surface roughness and surface texture of the object under test; and the material quality of the object under test is determined using the mechanical information, the internal component information and the surface information.

[0009] Optionally, in one embodiment of the present application, the use of the interdigital electrode sensor to obtain the electrical impedance signal based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode in the process of contacting, squeezing, and releasing the object to be measured includes: after the force loading mechanism executes a movement close to the object to be measured and moves to a contact position with the object to be measured, the force loading mechanism executes a movement of squeezing the object to be measured, and a first electrical impedance signal acquired by the interdigital electrode sensor is acquired during the movement of squeezing the object to be measured; after the force loading mechanism moves to the lowest contact limit with the object to be measured, the force loading mechanism stops moving and presses the object to be measured to acquire a second electrical impedance signal acquired by the interdigital electrode sensor when pressing the object to be measured; after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time, it executes a movement of releasing the object to be measured and moves to a separation position from the object to be measured, and the force loading mechanism executes a movement away from the object to be measured, and a third electrical impedance signal acquired by the interdigital electrode sensor is acquired during the movement of releasing the object to be measured;

[0010] After the force loading mechanism executes the movement approaching the object to be measured and moves to the contact position with the object to be measured, the force loading mechanism executes the movement of squeezing the object to be measured to the lowest contact limit, and during the movement of squeezing the object to be measured, the first current signal or the first voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor is obtained as the first friction electric signal; after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset time, it executes the movement of releasing the object to be measured and moves to the separation position with the object to be measured, and the force loading mechanism executes the movement away from the object to be measured, and during the movement of releasing the object to be measured, the second current signal or the second voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor is obtained as the second friction electric signal.

[0011] Optionally, in one embodiment of the present application, the use of the multi-parameter information to determine the material quality of the object under test includes: determining first mechanical information and first surface information of the object under test based on the first electrical impedance signal and the third electrical impedance signal; determining first internal component information of the object under test based on the second electrical impedance signal; determining second internal component information, second mechanical information, and second surface information of the object under test based on the first triboelectric signal and the second triboelectric signal; analyzing the first mechanical information, the first internal component information, the first surface information, the second mechanical information, the second internal component information, and the second surface information to obtain the material quality of the object under test.

[0012] Optionally, in one embodiment of the present application, it also includes: when the force loading mechanism performs periodic motion, contacting, squeezing, and releasing the object to be measured at different speeds or different forces to obtain multiple first electrical impedance signals, multiple second electrical impedance signals, multiple third electrical impedance signals, multiple first friction electric signals, and multiple second friction electric signals based on contacting, squeezing, and releasing the object to be measured at the different speeds or the different forces; using the multiple first electrical impedance signals, the multiple second electrical impedance signals, the multiple third electrical impedance signals, the multiple first friction electric signals, and the multiple second friction electric signals to obtain the target material quality of the object to be measured.

[0013] The second aspect of the present application provides a multi-parameter detection device for material quality based on a forked electrode sensor, wherein the force loading mechanism is provided with a forked electrode sensor, and the multi-parameter detection device for material quality based on the forked electrode sensor includes: a control module, used to make the force loading mechanism perform periodic motion so that the forked electrode sensor contacts, squeezes, and releases the object to be measured, wherein the forked electrode sensor includes a forked electrode pair and has an electrical impedance detection mode and a friction electric detection mode; a signal detection module, used to use the forked electrode sensor to obtain the electrical impedance signal of the object to be measured based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing, and releasing the object to be measured; a data analysis module, used to analyze the electrical impedance signal and the friction electric signal to obtain multi-parameter information of the object to be measured, and determine the material quality of the object to be measured using the multi-parameter information.

[0014] Optionally, in one embodiment of the present application, the signal detection module includes: a detection unit, which is used for the interdigital electrode sensor to alternately switch the electrical impedance detection mode and the friction electric detection mode during the periodic motion of the force loading mechanism, so as to obtain the electrical impedance signal and the friction electric signal of the object to be measured collected by the interdigital electrode sensor during the periodic motion; a first acquisition unit, which is used for the force loading mechanism to perform a squeezing movement of the object to be measured after the force loading mechanism performs a movement close to the object to be measured and moves to a contact position with the object to be measured, and to obtain a first electrical impedance signal collected by the interdigital electrode sensor during the squeezing movement; a second acquisition unit, which is used for the force loading mechanism to stop moving after the force loading mechanism moves to the lowest contact limit with the object to be measured, and to press the object to be measured, so as to obtain a second electrical impedance signal collected by the interdigital electrode sensor when the object to be measured is pressed; and a third acquisition unit, which is used for the force loading mechanism to release the object to be measured and move to a contact position with the object to be measured after the force loading mechanism moves to the lowest contact limit and remains stationary for a preset period of time. The force loading mechanism executes a movement away from the object to be measured, and during the process of releasing the object to be measured, a third electrical impedance signal collected by the interdigital electrode sensor is obtained; a fourth acquisition unit is used for, after the force loading mechanism executes a movement close to the object to be measured and moves to the contact position with the object to be measured, to squeeze the object to be measured to the lowest contact limit, and during the process of squeezing the object to be measured, to obtain a first current signal or a first voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor as a first friction electric signal; a fifth acquisition unit is used for, after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time, to release the object to be measured and move to the separation position with the object to be measured, the force loading mechanism executes a movement away from the object to be measured, and during the process of releasing the object to be measured, to obtain a second current signal or a second voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor as a second friction electric signal.

[0015] Optionally, in one embodiment of the present application, the data analysis module includes: an analysis unit, used to analyze the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the object under test, wherein the multi-parameter information includes mechanical information, internal component information and surface information, the mechanical information includes the compressibility, resilience and softness of the object under test; the internal component information includes the water content, material and other components of the object under test that affect the electrical impedance and triboelectricity of the object under test; the surface information includes the surface viscosity, surface roughness and surface texture of the object under test; a first determination unit, used to determine the material quality of the object under test using the mechanical information, the internal component information and the surface information; a second determination unit, used to perform a squeezing operation on the object under test when the force loading mechanism moves close to the object under test and moves to a contact position with the object under test. The device moves to the lowest contact limit, determines the contact position based on the electrical impedance signal and the friction electric signal, so as to determine the lowest contact limit between the force loading mechanism and the object to be measured; a third determining unit is used to determine the first mechanical information and the first surface information of the object to be measured according to the first electrical impedance signal and the third electrical impedance signal; a fourth determining unit is used to determine the first internal component information of the object to be measured according to the second electrical impedance signal; a fifth determining unit is used to determine the second internal component information, the second mechanical information and the second surface information of the object to be measured according to the first friction electric signal and the second friction electric signal; a data analysis unit is used to analyze the first mechanical information, the first internal component information, the first surface information, the second mechanical information, the second internal component information and the second surface information to obtain the material quality of the object to be measured.

[0016] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the multi-parameter material quality detection method based on the interdigital electrode sensor as described in the above embodiment.

[0017] The fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, it implements the above-mentioned multi-parameter material quality detection method based on the interdigital electrode sensor.

[0018] The fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned multi-parameter material quality detection method based on the interdigital electrode sensor.

[0019] The embodiment of the present application can make the force loading mechanism perform periodic motion, so that the forked electrode sensor contacts, squeezes, and releases the object to be measured. The forked electrode sensor includes a forked electrode pair and has an electrical impedance detection mode and a friction electric detection mode. Then, the forked electrode sensor is used to obtain the electrical impedance signal of the object to be measured based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing, and releasing the object to be measured, and the above signals are analyzed to obtain multi-parameter information of the object to be measured, so as to determine the material quality of the object to be measured, and then the quality of the food can be more accurately and comprehensively reflected, and the comprehensiveness and accuracy of the material quality detection can be improved. Thus, the problems that the cost of the related technology is high or the information provided is small, and it is easily affected by the external environment, resulting in low detection accuracy, inability to fully reflect the quality of the food, and reducing the comprehensiveness and accuracy of the material quality detection are solved.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A schematic diagram of a material quality multi-parameter detection system based on an interdigital electrode sensor provided according to an embodiment of the present application;

[0023] Figure 2 A basic structural diagram of an interdigital electrode sensor provided according to an embodiment of the present application;

[0024] Figure 3 A flowchart of a multi-parameter material quality detection method based on an interdigital electrode sensor provided according to an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of impedance mode detection of an interdigital multifunctional sensor according to a specific embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the triboelectric mode detection principle of an interdigital structure multifunctional sensor according to a specific embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of a material quality multi-parameter detection process based on an interdigital electrode sensor according to a specific embodiment of the present application;

[0028] Figure 7 This is a logic diagram of multi-parameter detection of material quality based on an interdigital electrode sensor according to a specific embodiment of the present application;

[0029] Figure 8 It is a structural schematic diagram of a material quality multi-parameter detection device based on an interdigital electrode sensor provided according to an embodiment of the present application;

[0030] Fig. 9 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] The following describes the material quality multi-parameter detection method and device based on the forked electrode sensor of the embodiment of the present application with reference to the accompanying drawings. In view of the high cost or little information provided by the related technology mentioned in the background technology center, and the fact that it is easily affected by the external environment, resulting in low detection accuracy, inability to fully reflect the quality of food, and reducing the comprehensiveness and accuracy of material quality detection, the present application provides a material quality multi-parameter detection method based on the forked electrode sensor, in which the force loading mechanism can be performed periodic motion so that the forked electrode sensor contacts, squeezes, and releases the object to be measured, and the forked electrode sensor includes a forked electrode pair and has an electrical impedance detection mode and a friction electric detection mode. Then, the forked electrode sensor is used to obtain the electrical impedance signal of the object to be measured based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing, and releasing the object to be measured, and the above signals are analyzed to obtain the multi-parameter information of the object to be measured, thereby determining the material quality of the object to be measured, and then more accurately and comprehensively reflecting the quality of food, improving the comprehensiveness and accuracy of material quality detection. This solves the problems of related technologies being high in cost or providing little information, and being easily affected by the external environment, resulting in low detection accuracy, inability to fully reflect the quality of food, and reduced comprehensiveness and accuracy of material quality testing.

[0033] The embodiment of the present application establishes a material quality multi-parameter detection system based on an interdigital electrode sensor, which is composed of a force loading mechanism and an interdigital electrode sensor. Figure 1As shown, it is assumed that the force loading mechanism performs periodic motion, the interdigital electrode sensor is fixed on the force loading mechanism, and the object to be measured is placed on the stage. For example, the force loading mechanism can be a robot finger, and the interdigital electrode sensor is mounted on the surface of the robot finger. The robot finger grasps the object to be measured according to a certain procedure for testing; wherein the force loading mechanism performs programmed periodic motion in a certain pattern to contact, squeeze, and release the object to be measured, and the interdigital electrode sensor obtains dynamic electrical impedance signals and frictional electric signals during the contact and separation process with the object to be measured, as well as static electrical impedance signals when the object to be measured is pressed.

[0034] It should be noted that the basic structure of the interdigital electrode sensor is as follows Figure 2 As shown, it is mainly composed of a substrate and a planar interdigital electrode. The interdigital electrode sensor includes an interdigital electrode pair, and the signal acquisition mode includes: electrical impedance detection between the interdigital electrode pairs, and triboelectric detection using one electrode or an electrode pair. The structural parameters of the interdigital electrode, such as finger length, finger width, and finger spacing, can be optimized according to the object being measured.

[0035] For example, in the interdigital electrode sensor in the embodiment of the present application, i.e., the interdigital structure multi-parameter sensor, the electrode substrate can be made of PI (Polyimide) film, the electrode can be made of copper (Cu), and a layer of gold (Au) can be arranged on the copper surface to enhance corrosion resistance. The electrode substrate can also be made of polyparaxylene (Parylene) film by vapor deposition, and chromium (Cr) can be used as the bonding layer between the base film and other metals, which can be set by relevant technicians and is not specifically limited here.

[0036] In practical applications, the force loading mechanism can be made of hard materials or flexible materials according to the needs. The multifunctional sensor with planar interdigitated structure can also be made of hard materials or flexible materials. If hard materials are used, the device has the advantages of low control difficulty and good robustness; if flexible materials are used, the system has the advantage of strong adaptability to irregular objects. The specific settings can be made by relevant technical personnel and are not specifically limited here.

[0037] Specifically, Figure 3 A schematic flow chart of a method for multi-parameter detection of material quality based on an interdigital electrode sensor provided in an embodiment of the present application.

[0038] like Figure 3 As shown, the material quality multi-parameter detection method based on the interdigital electrode sensor includes the following steps:

[0039] In step S301, the force loading mechanism is subjected to periodic motion so that the interdigital electrode sensor contacts, squeezes, and releases the object to be measured, wherein the interdigital electrode sensor comprises an interdigital electrode pair and has an electrical impedance detection mode and a friction electric detection mode.

[0040] It can be understood that the force loading mechanism of the above-mentioned system can perform periodic motion. For example, the force loading mechanism of the above-mentioned system can programmatically perform up and down periodic motion, left and right periodic motion, etc. in a certain mode, which is not specifically limited here, so that the forked electrode sensor contacts, squeezes, and releases the object to be measured. Among them, the forked electrode sensor includes a forked electrode pair, and has an impedance detection mode and a friction electric detection mode, so that the forked electrode sensor can perform impedance detection between the forked electrode pairs, as well as friction electric detection using one electrode or an electrode pair, which effectively improves the feasibility of multi-parameter detection of material quality.

[0041] It should be noted that the interdigital electrode pair may or may not have an insulating layer; the force loading mechanism may be any mechanism that can load force on the object being measured; the movement direction of the force loading mechanism is not limited and can be any movement direction that can load force on the object being measured.

[0042] In step S302, the interdigital electrode sensor is used to obtain the electrical impedance signal of the measured object based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing and releasing the measured object.

[0043] It can be understood that the embodiments of the present application can control the force loading mechanism to perform periodic motion, and use the interdigital electrode sensor to obtain the electrical impedance signal of the object under test based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing, and releasing the object under test, so as to obtain multi-parameter information of the object under test, such as mechanical information, internal composition information and surface information, so as to accurately determine the material quality of the object under test.

[0044] Among them, in one embodiment of the present application, the forked electrode sensor is used to obtain the electrical impedance signal of the object under test based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing, and releasing the object under test, including: during the periodic motion of the force loading mechanism, the forked electrode sensor alternately switches the electrical impedance detection mode and the friction electric detection mode to obtain the electrical impedance signal and the friction electric signal of the object under test collected by the forked electrode sensor during the periodic motion.

[0045] During the actual implementation process, the embodiment of the present application can alternately switch the electrical impedance detection mode and the friction electric detection mode of the fork finger electrode sensor during the periodic motion of the force loading mechanism, so as to obtain the electrical impedance signal and the friction electric signal of the object under test collected by the fork finger electrode sensor during the periodic motion, and obtain the multi-parameter information of the object under test by analyzing the electrical impedance signal and the friction electric signal, thereby effectively improving the accuracy and comprehensiveness of the multi-parameter detection of material quality.

[0046] It should be noted that the time and manner of alternating switching of the interdigital electrode sensors are specifically set by skills and technology and are not specifically limited here.

[0047] Optionally, in one embodiment of the present application, an electrical impedance signal based on an electrical impedance detection mode and a friction electric signal based on a friction electric detection mode are obtained during the process of contacting, squeezing, and releasing the object to be measured by using an interdigitated electrode sensor, including: after the force loading mechanism executes a movement close to the object to be measured and moves to a contact position with the object to be measured, the force loading mechanism executes a movement of squeezing the object to be measured, and a first electrical impedance signal collected by the interdigitated electrode sensor is obtained during the movement of squeezing the object to be measured; after the force loading mechanism moves to the lowest contact limit with the object to be measured, the force loading mechanism stops moving and presses the object to be measured to obtain a second electrical impedance signal collected by the interdigitated electrode sensor when the object to be measured is pressed; after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time, it executes a movement of releasing the object to be measured and moves to a separation position from the object to be measured, and the force loading mechanism executes a movement away from the object to be measured, and During the movement of releasing the measured object, a third electrical impedance signal collected by the forked electrode sensor is obtained; after the force loading mechanism executes a movement close to the measured object and moves to the contact position with the measured object, the force loading mechanism executes an extrusion movement of the measured object to the lowest contact limit, and during the extrusion movement of the measured object, a first current signal or a first voltage signal generated by the contact between the surface of the forked electrode sensor and the surface of the measured object collected by the forked electrode sensor is obtained as a first friction electric signal; after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time, a movement of releasing the measured object is executed and moves to a separation position from the measured object, and the force loading mechanism executes a movement away from the measured object, and during the movement of releasing the measured object, a second current signal or a second voltage signal generated by the contact between the surface of the forked electrode sensor and the surface of the measured object collected by the forked electrode sensor is obtained as a second friction electric signal.

[0048] For example, assuming that the force loading mechanism of the above-mentioned system performs an up and down cyclic motion, and after moving downward to the contact position with the object to be measured, the force loading mechanism continues to perform a downward squeezing motion of the object to be measured, and obtains a first electrical impedance signal collected by the interdigital electrode sensor during the squeezing motion of the object to be measured, and after moving downward to the lowest contact limit with the object to be measured, the force loading mechanism stops moving and presses the object to be measured to obtain a second electrical impedance signal collected by the interdigital electrode sensor when pressing the object to be measured; after the force loading mechanism runs to the lowest contact limit and remains stationary for a certain period of time, it performs an upward movement to release the object to be measured and moves to a separation position from the object to be measured, that is, the force loading mechanism performs a movement away from the object to be measured, and obtains a third electrical impedance signal collected by the interdigital electrode sensor during the release motion of the object to be measured; wherein, the electrical impedance signal collected during the pressing mainly reflects the internal information of the compressed object to be measured, such as the water content and composition, which affects the electrical conductivity characteristics of the object to be measured, and the change of the dynamic electrical impedance signal obtained during the movement includes mechanical information related to the structure of the object to be measured during the extrusion deformation and recovery process, which effectively improves the accuracy of multi-parameter detection of material quality.

[0049] For example, Figure 4 As shown, in the impedance detection mode, the object under test is in contact with the electrode surface. The inherent impedance of the electrode itself, the impedance of the object under test, and the contact impedance between the object under test and the electrode constitute the impedance between the two interdigital electrodes, which can be regarded as a two-port network. In the impedance detection mode, an AC signal excitation of a specific frequency is applied between the two interdigital electrodes, and its electrical signal response is measured. The impedance information at this frequency can be obtained by analyzing the relationship between the input and output electrical signals. Furthermore, by performing a sweep test on a certain frequency range, the impedance spectrum of the frequency range can be obtained, which contains more information than the impedance value of a specific frequency. The impedance of the object under test reflects the internal component information such as the water content of the object under test that affects the electrical conductivity characteristics of the object under test; the contact impedance between the object under test and the electrode reflects the surface electrochemical information of the object under test and the contact state of the object under test and the electrode (surface morphology and mechanical information).

[0050] Among them, when collecting electrical impedance signals, a small-amplitude sinusoidal voltage (or current) of a certain frequency is applied to the interdigital electrode pair of the interdigital electrode sensor, and the waveform of the current (or the voltage on the interdigital electrode pair) flowing through the interdigital electrode pair is recorded. The current or voltage waveform contains amplitude and phase information; when collecting electrical impedance signals, the current or voltage information of several different frequency points can be collected, or the frequency can be swept within a certain frequency range to collect the current or voltage information of each frequency in the sweep range.

[0051] It should be noted that the two pairs of interdigital electrodes of the interdigital electrode sensor may be in any other shape, such as arc, ring, spiral, etc. Furthermore, the electrode pair may be composed of multiple groups of interdigital electrodes connected in series and in parallel.

[0052] For another example, assume that the force loading mechanism of the above-mentioned system performs an up and down cyclic motion. After the force loading mechanism performs a downward motion approaching the object to be measured and moves to a contact position with the object to be measured, the force loading mechanism continues to perform a downward motion to squeeze the object to be measured to the lowest contact limit. During the downward squeezing movement of the object to be measured, a first current signal or a first voltage signal generated by the contact between the surface of the forked electrode sensor and the surface of the object to be measured collected by the forked electrode sensor is obtained as a first friction electric signal. Then, after the force loading mechanism moves downward to the lowest contact limit and remains stationary for a certain period of time, it performs an upward motion to release the object to be measured and moves to a separation position with the object to be measured, that is, the force loading mechanism performs a motion away from the object to be measured. During the loosening movement of the object to be measured, a second current signal or a second voltage signal generated by the contact between the surface of the forked electrode sensor and the surface of the object to be measured collected by the forked electrode sensor is obtained as a second friction electric signal, thereby effectively improving the accuracy of multi-parameter detection of material quality.

[0053] For example, Figure 5 As shown, in the triboelectric detection mode, when the forked electrode sensor electrode contacts, squeezes, and separates from the object to be measured, the surface of the forked electrode sensor and the surface of the object to be measured will carry opposite charges due to the triboelectric effect, wherein the amount of charge carried is related to the material triboelectric sequence of the object to be measured, the surface state, the surface texture, and the contact condition between the sensor and the object to be measured; when the forked electrode sensor electrode is connected to the reference ground through a resistor, the charge on the electrode will flow into the reference ground through the resistor, generating a voltage on the resistor, and a triboelectric signal will be obtained by measuring the current or the voltage on the resistor, that is, when the sensor and the object to be measured move relative to each other, a triboelectric signal reflecting the characteristics of the object to be measured can be detected. The triboelectric detection mode can use one electrode or an electrode pair of the forked electrode as an electrode for triboelectric detection, wherein when the triboelectric signal is collected, any one electrode of the forked electrode of the forked electrode sensor can be used, or the two electrodes of the forked electrode can be connected and used simultaneously. When using an electrode pair as an electrode for triboelectric detection, the electrode pair is short-circuited and used as one electrode, which increases the contact area between the material being tested and the electrode, enhances the output triboelectric signal, and effectively improves the accuracy of multi-parameter detection of material quality.

[0054] Among them, when the force loading mechanism drives the interdigital electrode sensor to complete the contact, extrusion, and separation actions with the object to be measured, the surface of the interdigital electrode sensor and the surface of the object to be measured will carry opposite charges due to the triboelectric effect. The amount of charge carried is related to the material triboelectric sequence, surface state, surface texture and contact condition between the interdigital electrode sensor and the object to be measured. Therefore, during multiple contact, extrusion, and separation movements, the triboelectric signal integrates the mechanical information (contact condition), material information (triboelectric sequence) and surface state and texture information of the object to be measured.

[0055] It should be noted that the preset duration is set by those skilled in the art according to actual conditions and is not specifically limited here.

[0056] In step S303, the electrical impedance signal and the friction electric signal are analyzed to obtain multi-parameter information of the measured object, and the material quality of the measured object is determined using the multi-parameter information.

[0057] It can be understood that the embodiments of the present application can analyze the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the object under test, such as mechanical information, internal composition information, surface information and other related information. For example, the embodiments of the present application can detect the electrical impedance signal and the triboelectric signal of the interdigital electrode sensor, and then use the machine learning algorithm to decouple the signals of different parameters to obtain the mechanical information, internal composition information and surface information of the object under test. Furthermore, by analyzing the obtained multi-parameter information, the multi-parameter detection results of the material quality of the object under test can be determined, thereby effectively improving the comprehensiveness and accuracy of the material quality detection.

[0058] Specifically, the multi-parameter information in the embodiments of the present application includes mechanical information, internal composition information and surface information, wherein the mechanical information includes the compressibility, resilience and softness of the object under test; the internal composition information includes the water content, material and other components of the object under test that affect the electrical impedance and triboelectricity of the object under test; the surface information includes the surface viscosity, surface roughness and surface texture of the object under test; the material quality of the object under test is determined using the mechanical information, internal composition information and surface information, and the comprehensiveness and accuracy of material quality detection are effectively improved through analysis of the acquired multi-parameter information.

[0059] Optionally, in one embodiment of the present application, multi-parameter information is used to determine the material quality of the object under test, including: determining first mechanical information and first surface information of the object under test based on the first electrical impedance signal and the third electrical impedance signal; determining first internal component information of the object under test based on the second electrical impedance signal; determining second internal component information, second mechanical information, and second surface information of the object under test based on the first triboelectric signal and the second triboelectric signal; analyzing the first mechanical information, first internal component information, first surface information, second mechanical information, second internal component information, and second surface information to obtain the material quality of the object under test.

[0060] For example, Figure 6 As shown, the force loading mechanism of the above system performs periodic motion. In the embodiment of the present application, the force loading mechanism can perform a movement close to the object to be measured from a starting position, squeeze the object to be measured, obtain a first electrical impedance signal collected by the interdigital electrode sensor during the squeezing of the object to be measured, and perform a movement away from the object to be measured and move to a separation position from the object to be measured, obtain a third electrical impedance signal collected by the interdigital electrode sensor during the movement away from the object to be measured, determine first mechanical information and first surface information of the object to be measured; determine first internal component information of the object to be measured based on the second electrical impedance signal collected by pressing the object to be measured; continue to perform the squeezing of the object to be measured according to the force loading mechanism Move to the lowest contact limit, obtain a first friction electric signal in the process of squeezing the measured object and obtain a second friction electric signal in the process of releasing the measured object, determine the second internal component information, second mechanical information and second surface information of the measured object; analyze the first mechanical information, the first internal component information, the first surface information, the second mechanical information, the second internal component information and the second surface information, and obtain the material quality of the measured object by analyzing the obtained multi-parameter information, so that the state and quality of the measured object can be judged and classified, and then obtain the multi-parameter detection result of the material quality of the measured object, which effectively improves the comprehensiveness of material quality detection.

[0061] For example, Figure 7The figure shows the logic diagram of multi-parameter material quality detection based on the interdigital electrode sensor. First, after the system is started, the force loading mechanism moves close to the object to be measured from the starting position and starts to collect sensor signals, such as impedance signals or friction signals. When the sensor reaches the contact position with the object to be measured, the force loading mechanism continues to move close to the object to be measured to squeeze the object to be measured, and stays still at the lowest limit for a period of time; then the force loading mechanism releases the object to be measured, the sensor separates from the object to be measured, stops collecting sensor signals, and the force loading mechanism moves away from the object to be measured and returns to the initial position; secondly, when the object to be measured reaches the set number of detections, the detection is stopped, otherwise the signal detection mode is switched, such as switching from the electrical impedance detection mode to the friction electric detection mode, thereby improving the comprehensiveness of material quality detection.

[0062] It should be noted that since the detection circuits of the impedance detection mode and the frictional electric detection mode of the interdigital electrode sensor are different, when in use, the detection circuit can be switched by switching the connection method of the electrodes to perform time-sharing detection and realize multi-functional multiplexing.

[0063] In addition, in response to the needs of the food industry and agricultural production for the identification and appraisal of different materials, a fixed force loading parameter process can be designed according to the characteristics of the object being measured. When the driving force or relative maximum displacement of the force loading mechanism is consistent, objects with different mechanical properties will produce different deformations, and the electrical impedance signals and triboelectric signals generated by the process are different. In this way, different mechanical properties, different material properties or different surface states can be distinguished. By detecting the impedance electrical signal and triboelectric signal of the sensor, the mechanical information, internal component information and surface information of the object being measured are obtained at the same time, and the machine learning algorithm is used to effectively decouple and utilize the information in three dimensions, so that the food industry and agricultural production can realize the identification and appraisal of the quality of raw materials and processing materials.

[0064] Optionally, in one embodiment of the present application, it also includes: when the force loading mechanism performs periodic motion, contacting, squeezing, and releasing the object to be measured at different speeds or different forces to obtain multiple first electrical impedance signals, multiple second electrical impedance signals, multiple third electrical impedance signals, multiple first friction electric signals, and multiple second friction electric signals based on contacting, squeezing, and releasing the object to be measured at different speeds or different forces; using the multiple first electrical impedance signals, multiple second electrical impedance signals, multiple third electrical impedance signals, multiple first friction electric signals, and multiple second friction electric signals to obtain the target material quality of the object to be measured.

[0065] In the embodiment of the present application, the target material quality is a more accurate material quality obtained through multiple signals.

[0066] In some embodiments, when the force loading mechanism performs periodic motion, it can contact, squeeze, and release the object to be measured at different speeds or different forces to obtain multiple first electrical impedance signals, multiple second electrical impedance signals, multiple third electrical impedance signals, multiple first friction electric signals, and multiple second friction electric signals of the object to be measured under different speeds or different forces of contact, squeezing, and release. More signals can be used to more accurately obtain the material quality of the object to be measured and improve the comprehensiveness of material quality detection.

[0067] According to the multi-parameter material quality detection method based on the forked electrode sensor proposed in the embodiment of the present application, the force loading mechanism can be subjected to periodic motion so that the forked electrode sensor contacts, squeezes, and releases the object to be measured. The forked electrode sensor includes a forked electrode pair and has an electrical impedance detection mode and a friction electric detection mode. Then, the forked electrode sensor is used to obtain the electrical impedance signal of the object to be measured based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the contact, squeezing, and release of the object to be measured, and the above signals are analyzed to obtain multi-parameter information of the object to be measured, thereby determining the material quality of the object to be measured, and then more accurately and comprehensively reflecting the quality of the food, improving the comprehensiveness and accuracy of the material quality detection. Thus, the problems of the related technology being high in cost or providing little information, and being easily affected by the external environment, resulting in low detection accuracy, inability to fully reflect the quality of the food, and reducing the comprehensiveness and accuracy of the material quality detection are solved.

[0068] Next, a multi-parameter detection device for material quality based on an interdigital electrode sensor according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0069] Figure 8 It is a block diagram of a multi-parameter detection device for material quality based on an interdigital electrode sensor according to an embodiment of the present application.

[0070] like Figure 8 As shown, the material quality multi-parameter detection device 10 based on the interdigital electrode sensor includes: a control module 100, a signal detection module 200 and a data analysis module 300.

[0071] Specifically, the control module 100 is used to make the force loading mechanism perform periodic motion so that the interdigital electrode sensor contacts, squeezes, and releases the object to be measured, wherein the interdigital electrode sensor includes an interdigital electrode pair and has an electrical impedance detection mode and a friction electric detection mode.

[0072] The signal detection module 200 is used to use the interdigital electrode sensor to obtain the electrical impedance signal of the object under test based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the process of contacting, squeezing and releasing the object under test.

[0073] The data analysis module 300 is used to analyze the electrical impedance signal and the friction electric signal to obtain multi-parameter information of the measured object, and determine the material quality of the measured object using the multi-parameter information.

[0074] Optionally, in one embodiment of the present application, the signal detection module 200 includes: a detection unit, a first acquisition unit, a second acquisition unit, a third acquisition unit, a fourth acquisition unit and a fifth acquisition unit.

[0075] Among them, the detection unit is used to alternately switch the electrical impedance detection mode and the friction electric detection mode of the interdigital electrode sensor during the periodic motion of the force loading mechanism, so as to obtain the electrical impedance signal and friction electric signal of the object under test collected by the interdigital electrode sensor during the periodic motion.

[0076] The first acquisition unit is used to obtain a first electrical impedance signal collected by the interdigital electrode sensor during the squeezing movement after the force loading mechanism moves close to the object to be measured and moves to a contact position with the object to be measured, and the force loading mechanism performs a squeezing movement on the object to be measured.

[0077] The second acquisition unit is used to stop the force loading mechanism from moving after the force loading mechanism moves to the lowest contact limit with the object to be measured, and to press the object to be measured, so as to obtain a second electrical impedance signal collected by the interdigital electrode sensor when the object to be measured is pressed.

[0078] The third acquisition unit is used to release the object to be measured and move to a separation position from the object to be measured after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time. The force loading mechanism moves away from the object to be measured, and obtains the third electrical impedance signal collected by the interdigital electrode sensor during the process of releasing the object to be measured.

[0079] The fourth acquisition unit is used to execute the squeezing movement of the measured object to the lowest contact limit after the force loading mechanism moves close to the measured object and moves to the contact position with the measured object, and to obtain the first current signal or the first voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the measured object collected by the interdigital electrode sensor during the squeezing movement of the measured object as the first friction electric signal.

[0080] The fifth acquisition unit is used to release the object to be measured and move to a separation position from the object to be measured after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time. The force loading mechanism executes a movement away from the object to be measured. During the process of releasing the object to be measured, a second current signal or a second voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor is obtained as a second friction electric signal.

[0081] Optionally, in one embodiment of the present application, the data analysis module 300 includes: an analysis unit, a first determination unit, a second determination unit, a third determination unit, a fourth determination unit, a fifth determination unit and a data analysis unit.

[0082] Among them, the analysis unit is used to analyze the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the object under test, wherein the multi-parameter information includes mechanical information, internal component information and surface information, the mechanical information includes the compressibility, resilience and softness of the object under test; the internal component information includes the water content, material and other components that affect the electrical impedance and triboelectricity of the object under test; the surface information includes the surface viscosity, surface roughness and surface texture of the object under test.

[0083] The first determination unit is used to determine the material quality of the measured object by using mechanical information, internal component information and surface information.

[0084] The second determination unit is used to squeeze the measured object to a minimum contact limit when the force loading mechanism moves close to the measured object and moves to a contact position with the measured object, wherein the contact position is determined based on the electrical impedance signal and the friction electric signal to determine the minimum contact limit between the force loading mechanism and the measured object.

[0085] The third determination unit is used to determine the first mechanical information and the first surface information of the measured object according to the first electrical impedance signal and the third electrical impedance signal.

[0086] The fourth determining unit is used to determine the first internal component information of the measured object according to the second electrical impedance signal.

[0087] The fifth determination unit is used to determine the second internal component information, the second mechanical information and the second surface information of the object to be measured according to the first triboelectric signal and the second triboelectric signal.

[0088] The data analysis unit is used to analyze the first mechanical information, the first internal component information, the first surface information, the second mechanical information, the second internal component information, and the second surface information to obtain the material quality of the object being measured.

[0089] It should be noted that the above explanation of the embodiment of the multi-parameter detection method for material quality based on the interdigital electrode sensor is also applicable to the multi-parameter detection device for material quality based on the interdigital electrode sensor of this embodiment, which will not be repeated here.

[0090] According to the material quality multi-parameter detection device based on the forked electrode sensor proposed in the embodiment of the present application, the force loading mechanism can be made to perform periodic motion so that the forked electrode sensor contacts, squeezes, and releases the object to be measured. The forked electrode sensor includes a forked electrode pair and has an electrical impedance detection mode and a friction electric detection mode. Then, the forked electrode sensor is used to obtain the electrical impedance signal of the object to be measured based on the electrical impedance detection mode and the friction electric signal based on the friction electric detection mode during the contact, squeezing, and release of the object to be measured, and the above signals are analyzed to obtain multi-parameter information of the object to be measured, so as to determine the material quality of the object to be measured, and then the quality of the food can be more accurately and comprehensively reflected, and the comprehensiveness and accuracy of the material quality detection can be improved. Thus, the problems that the related technology has high cost or provides little information, and is easily affected by the external environment, resulting in low detection accuracy, inability to fully reflect the quality of the food, and reduced comprehensiveness and accuracy of the material quality detection are solved.

[0091] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0092] A memory 901 , a processor 902 , and a computer program stored in the memory 901 and executable on the processor 902 .

[0093] When the processor 902 executes the program, the multi-parameter material quality detection method based on the interdigital electrode sensor provided in the above embodiment is implemented.

[0094] Furthermore, the electronic device further comprises:

[0095] The communication interface 903 is used for communication between the memory 901 and the processor 902 .

[0096] The memory 901 is used to store computer programs that can be executed on the processor 902 .

[0097] The memory 901 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0098] If the memory 901, the processor 902 and the communication interface 903 are implemented independently, the communication interface 903, the memory 901 and the processor 902 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0099] Optionally, in a specific implementation, if the memory 901, the processor 902 and the communication interface 903 are integrated on a chip, the memory 901, the processor 902 and the communication interface 903 can communicate with each other through an internal interface.

[0100] The processor 902 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0101] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned multi-parameter material quality detection method based on the interdigital electrode sensor is implemented.

[0102] This embodiment also provides a computer program product, including a computer program. When the computer program is executed, it is used to implement the above-mentioned multi-parameter material quality detection method based on the interdigital electrode sensor.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0104] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0105] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0106] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0107] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0108] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0109] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0110] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A multi-parameter material quality detection method based on an interdigital electrode sensor, characterized in that: The force loading mechanism is provided with an interdigital electrode sensor, wherein the material quality multi-parameter detection method based on the interdigital electrode sensor comprises the following steps: The force loading mechanism is caused to perform periodic motion so that the interdigital electrode sensor contacts, squeezes, and releases the object to be measured, wherein the interdigital electrode sensor comprises an interdigital electrode pair and has an electrical impedance detection mode and a triboelectric detection mode; Using the interdigital electrode sensor to obtain an electrical impedance signal of the object under test based on the electrical impedance detection mode and a friction electric signal based on the friction electric detection mode during contact, squeezing, and releasing of the object under test; The electrical impedance signal and the friction electric signal are analyzed to obtain multi-parameter information of the measured object, and the material quality of the measured object is determined using the multi-parameter information.

2. The method according to claim 1, characterized in that The method of using the interdigital electrode sensor to obtain the electrical impedance signal of the object under test based on the electrical impedance detection mode and the frictional electric signal based on the frictional electric detection mode during the process of contacting, squeezing, and releasing the object under test includes: During the periodic motion performed by the force loading mechanism, the interdigital electrode sensor alternately switches between the electrical impedance detection mode and the frictional electric detection mode to obtain the electrical impedance signal and the frictional electric signal of the object under test collected by the interdigital electrode sensor during the periodic motion.

3. The method according to claim 1, characterized in that The analyzing the electrical impedance signal and the friction electric signal to obtain multi-parameter information of the measured object, and determining the material quality of the measured object by using the multi-parameter information, includes: Analyzing the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the measured object, wherein the multi-parameter information includes mechanical information, internal component information and surface information, and the mechanical information includes compressibility, resilience and softness of the measured object; The internal component information includes the water content, material and other components that affect the electrical impedance and triboelectricity of the object being measured; The surface information includes the surface viscosity, surface roughness and surface texture of the object to be measured; The material quality of the measured object is determined using the mechanical information, the internal component information and the surface information.

4. The method according to claim 1, characterized in that: The method of using the interdigital electrode sensor to obtain the electrical impedance signal based on the electrical impedance detection mode and the triboelectric signal based on the triboelectric detection mode in the process of contacting, squeezing, and releasing the object to be detected includes: After the force loading mechanism performs a movement approaching the measured object and moves to a contact position with the measured object, the force loading mechanism performs a movement of squeezing the measured object, and acquires a first electrical impedance signal collected by the interdigital electrode sensor during the movement of squeezing the measured object; After the force loading mechanism moves to the lowest contact limit with the measured object, the force loading mechanism stops moving and presses the measured object to obtain a second electrical impedance signal collected by the interdigital electrode sensor when the measured object is pressed; After the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time, the force loading mechanism performs a movement to release the object to be measured and moves to a separation position from the object to be measured, and the force loading mechanism performs a movement away from the object to be measured, and a third electrical impedance signal collected by the interdigital electrode sensor is obtained during the movement of releasing the object to be measured; After the force loading mechanism executes movement close to the measured object and moves to a contact position with the measured object, the force loading mechanism executes squeezing the measured object to the lowest contact limit, and in the process of squeezing the measured object, a first current signal or a first voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the measured object collected by the interdigital electrode sensor is obtained as a first triboelectric signal; After the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time, the movement of releasing the object to be measured is executed and the force loading mechanism moves to the separation position from the object to be measured. The force loading mechanism moves away from the object to be measured, and during the process of releasing the movement of the object to be measured, a second current signal or a second voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor is obtained as a second friction electric signal.

5. The method according to claim 4, characterized in that The method of determining the material quality of the measured object by using the multi-parameter information includes: Determining first mechanical information and first surface information of the measured object according to the first electrical impedance signal and the third electrical impedance signal; determining first internal component information of the measured object according to the second electrical impedance signal; Determining second internal component information, second mechanical information, and second surface information of the measured object according to the first triboelectric signal and the second triboelectric signal; The first mechanical information, the first internal component information, the first surface information, the second mechanical information, the second internal component information, and the second surface information are analyzed to obtain the material quality of the measured object.

6. The method according to claim 1, characterized in that Also includes: When the force loading mechanism performs the periodic motion, the object to be measured is contacted, squeezed, and released at different speeds or different forces to obtain a plurality of first electrical impedance signals, a plurality of second electrical impedance signals, a plurality of third electrical impedance signals, a plurality of first triboelectric signals, and a plurality of second triboelectric signals based on the contact, squeezing, and releasing of the object to be measured at the different speeds or the different forces; The target material quality of the measured object is obtained by using the multiple first electrical impedance signals, the multiple second electrical impedance signals, the multiple third electrical impedance signals, the multiple first triboelectric signals and the multiple second triboelectric signals.

7. A material quality multi-parameter detection device based on an interdigital electrode sensor, characterized in that: The force loading mechanism is provided with an interdigital electrode sensor, wherein the material quality multi-parameter detection device based on the interdigital electrode sensor comprises: A control module, used to make the force loading mechanism perform periodic motion so that the interdigital electrode sensor contacts, squeezes, and releases the object to be measured, wherein the interdigital electrode sensor includes an interdigital electrode pair and has an electrical impedance detection mode and a triboelectric detection mode; A signal detection module, used for obtaining, by using the interdigital electrode sensor, an electrical impedance signal of the object under test based on the electrical impedance detection mode and a friction electric signal based on the friction electric detection mode during contact, squeezing, and releasing of the object under test; The data analysis module is used to analyze the electrical impedance signal and the friction electric signal to obtain multi-parameter information of the measured object, and determine the material quality of the measured object using the multi-parameter information.

8. The device according to claim 7, characterized in that The signal detection module comprises: A detection unit, configured to cause the interdigital electrode sensor to alternately switch between the electrical impedance detection mode and the triboelectric detection mode during the periodic motion of the force loading mechanism, so as to obtain the electrical impedance signal and the triboelectric signal of the object under test collected by the interdigital electrode sensor during the periodic motion; A first acquisition unit, configured to, after the force loading mechanism moves close to the measured object and moves to a contact position with the measured object, cause the force loading mechanism to perform a squeezing movement on the measured object, and to acquire a first electrical impedance signal collected by the interdigital electrode sensor during the squeezing movement; A second acquisition unit is used for stopping the movement of the force loading mechanism after the force loading mechanism moves to the lowest contact limit with the measured object, and pressing the measured object to obtain a second electrical impedance signal collected by the interdigital electrode sensor when the measured object is pressed; A third acquisition unit is used to release the measured object and move to a separation position from the measured object after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset time, and the force loading mechanism moves away from the measured object, and acquires a third electrical impedance signal collected by the interdigital electrode sensor during the process of releasing the measured object; a fourth acquisition unit, configured to, after the force loading mechanism moves close to the measured object and moves to a contact position with the measured object, squeeze the measured object to move to the lowest contact limit, and acquire, during the squeezing movement of the measured object, a first current signal or a first voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the measured object collected by the interdigital electrode sensor as a first triboelectric signal; A fifth acquisition unit is used to release the object to be measured and move to the separation position from the object to be measured after the force loading mechanism runs to the lowest contact limit and remains stationary for a preset period of time. The force loading mechanism executes a movement away from the object to be measured, and during the process of releasing the object to be measured, a second current signal or a second voltage signal generated by the contact between the surface of the interdigital electrode sensor and the surface of the object to be measured collected by the interdigital electrode sensor is obtained as a second friction electric signal.

9. The device according to claim 8, characterized in that The data analysis module includes: an analysis unit, configured to analyze the electrical impedance signal and the triboelectric signal to obtain multi-parameter information of the measured object, wherein the multi-parameter information includes mechanical information, internal component information and surface information, and the mechanical information includes compressibility, resilience and softness of the measured object; The internal component information includes the water content, material and other components that affect the electrical impedance and triboelectricity of the object being measured; The surface information includes the surface viscosity, surface roughness and surface texture of the object to be measured; A first determination unit, configured to determine the material quality of the measured object by using the mechanical information, the internal component information and the surface information; A second determining unit is used for, when the force loading mechanism moves close to the measured object and moves to a contact position with the measured object, to squeeze the measured object to move to the lowest contact limit, wherein the contact position is determined based on the electrical impedance signal and the friction electric signal, and the lowest contact limit between the force loading mechanism and the measured object is determined; A third determining unit, configured to determine first mechanical information and first surface information of the measured object according to the first electrical impedance signal and the third electrical impedance signal; a fourth determining unit, configured to determine first internal component information of the measured object according to the second electrical impedance signal; a fifth determining unit, configured to determine second internal component information, second mechanical information, and second surface information of the measured object according to the first triboelectric signal and the second triboelectric signal; A data analysis unit is used to analyze the first mechanical information, the first internal component information, the first surface information, the second mechanical information, the second internal component information, and the second surface information to obtain the material quality of the object being measured.

Images