Device and method for detecting fat content of meat paste

Abstract

The invention relates to a meat paste fat content detection device and method, relates to the technical field of food detection, and aims at solving the problems that the meat fat content detection process is tedious and the cost is relatively high. The device comprises a power-on module which is used for outputting an alternating current signal with a constant amplitude; the electrode array is connected to two sides of the meat paste sample and is used for releasing current to the uniform meat paste sample; the signal conditioning module is used for collecting a voltage signal of the meat paste sample, decomposing an impedance component and a capacitive reactance component of the meat paste sample and outputting the impedance component and the capacitive reactance component to the calculation module; the weighing module is used for detecting the weight of the meat paste sample and outputting the weight to the calculation module; the calculation module is used for calculating the proportion of fat in the meat paste sample according to the weight, the impedance component and the capacitive reactance component of the meat paste sample and the type of the meat paste sample. By collecting the impedance value, the capacitive reactance value and the weight of the meat paste sample and utilizing the pre-established mathematical model, the fat content in the meat paste sample can be rapidly measured, and the method is low in cost, accurate and efficient.

Description

Technical Field

[0001] This application relates to the field of food testing technology, and in particular to a device and method for detecting the fat content of minced meat. Background Technology

[0002] The testing of fat content in meat is not only related to the energy source of meat products, but also plays a crucial role in many other aspects. By measuring fat content, we can gain a deeper understanding of the quality and nutritional value of meat products, thus providing strong support for the supervision of production processes, the control of product quality, and the exploration of food storage methods. Therefore, fat testing in meat products has become an important link in ensuring food safety and quality.

[0003] In existing technologies, there are two main methods for detecting the fat content of meat: subjective assessment and objective measurement. Subjective assessment is performed by experienced technicians who grade the meat based on its marbling and feel. Objective assessment typically utilizes computer vision models or Soxhlet extraction methods for grading.

[0004] While subjective assessment methods can roughly distinguish the level of intramuscular fat content in pigs, the results are easily affected by the skill and proficiency of the technicians, leading to low accuracy; furthermore, the learning cost of these measurement techniques is high. Objective assessment methods, on the other hand, can achieve higher accuracy in measuring meat fat content, but these methods are typically cumbersome and have higher testing costs. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this application provides a device and method for detecting the fat content of minced meat.

[0006] The meat fat content detection device provided in this application adopts the following technical solution: A device for detecting the fat content of minced meat, comprising: The power-on module is used to output a constant amplitude AC current signal to the electrode array; The electrode array, including a positive electrode array and a negative electrode array, has its input end connected to the power supply module, its output end connected to the signal conditioning module, and its detection end connected to both sides of the meat paste sample, for releasing current to the uniform meat paste sample. The signal conditioning module has its input end connected to the output end of the electrode array and its output end connected to the calculation module. It is used to collect the voltage signal of the minced meat sample, decompose the impedance component and capacitive reactance component of the minced meat sample, and output them to the calculation module. The weighing module, connected to the calculation module, is used to detect the weight of the minced meat sample and output the result to the calculation module. The calculation module is used to calculate the proportion of fat in the minced meat sample based on the weight, impedance component, capacitive component, and type of minced meat sample.

[0007] A further technical solution is that the power-on module includes: The microcontroller unit is used to output a stable 50Hz sine wave to the voltage-controlled current source circuit. A voltage-controlled current source circuit is used to convert a voltage signal into an AC current signal with a constant amplitude and output it to the electrode array.

[0008] A further technical solution is that the microcontroller unit is communicatively connected to a display screen with interactive functions, and the display screen is communicatively connected to the computing unit.

[0009] A further technical solution is that the amplitude of the alternating current signal is 200μA~500μA.

[0010] A further technical solution is that the signal conditioning module includes: An instrumentation amplifier, connected to the electrode array, is used to acquire and amplify the voltage signal of the minced meat sample and output it to an active bandpass filter. An active bandpass filter is used to filter the received voltage signal and output the filtered voltage signal to a phase-sensitive detector. A phase-sensitive detector is used to separate the amplitude and phase of the received voltage signal, calculate the impedance and capacitive reactance components, and output them to the calculation module.

[0011] A further technical solution is that the device also includes a temperature sensor, whose signal output terminal is connected to the computing module, for detecting the temperature signal of the minced meat sample and outputting it to the computing module.

[0012] Compared with the prior art, this application includes the following beneficial technical effects: By applying a safe and weak high-frequency AC signal to the meat sample through an electrode array, the impedance and capacitive reactance values ​​generated when the current flows through the meat sample are measured, and the weight value of the meat sample is collected. Through the mathematical model pre-established in the calculation module, the percentage of fat content in the meat sample can be quickly measured, which is low-cost, accurate and efficient.

[0013] This application also provides a method for detecting the fat content of minced meat, using a minced meat fat content detection device as described above, the method comprising the following steps: S1. Establish multiple detection models and store them in the computing unit; S2. Homogenize the meat sample to be tested into minced meat and place it on a weighing sensor to detect the weight of the minced meat; S3. Contact the electrode array with the two opposite sides of the minced meat, and detect the impedance and capacitive reactance of the minced meat after applying current; S4. Select the corresponding detection model according to the type of minced meat and calculate the fat content percentage.

[0014] Compared with the prior art, the beneficial effects of the method for detecting the fat content of minced meat provided by the present invention are the same as the beneficial effects of the device for detecting the fat content of minced meat described in the above technical solution, and will not be repeated here. Attached Figure Description

[0015] Figure 1 This is an overall structural connection block diagram of one embodiment of this application; Figure 2 This is an overall structural connection block diagram of another embodiment of this application; Figure 3 This is an overall structural connection block diagram of another embodiment of this application. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0017] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0019] This application discloses a device for detecting the fat content of minced meat. Please refer to... Figure 1 The device includes a power supply module, an electrode array, a signal conditioning module, a weighing module, and a calculation module.

[0020] The power-on module includes a microcontroller unit and a voltage-controlled current source circuit. The microcontroller unit outputs a stable 50Hz sine wave to the voltage-controlled current source circuit, which converts the received voltage signal into a constant-amplitude alternating current signal and outputs it to the electrode array. In this embodiment, the amplitude of the alternating current signal can be selected from 200μA to 500μA. The weak alternating current amplitude can eliminate errors caused by changes in contact resistance, ensuring the safety and accuracy of the measurement.

[0021] The electrode array includes a positive electrode array and a negative electrode array. Its input terminal is connected to the power supply module, its output terminal is connected to the signal conditioning module, and its detection terminal is connected to both sides of the meat paste sample to release current to the uniform meat paste sample. The positive electrode array and the negative electrode array are two parallel metal plates. During detection, the meat paste needs to be homogenized and arranged into a regular rectangular structure. The electrode arrays contact the two opposite sides of the meat paste sample respectively, so that the current can fully pass through the end face of the meat paste sample.

[0022] The input terminal of the signal conditioning module is connected to the output terminal of the electrode array, and its output terminal is connected to the calculation module. It is used to collect the voltage signal of the minced meat sample, decompose the impedance component and capacitive reactance component of the minced meat sample, and output them to the calculation module.

[0023] Specifically, the signal conditioning module includes an instrumentation amplifier, an active bandpass filter, and a phase-sensitive detector. The instrumentation amplifier is connected to the electrode array to acquire and amplify the voltage signal of the minced meat sample, outputting it to the active bandpass filter. The instrumentation amplifier uses an AD620 model, which has extremely high input impedance, ensuring that the current flowing through the meat sample is not shunted by the measurement circuit in the instrumentation amplifier, effectively eliminating the influence of contact resistance on the measurement.

[0024] An active bandpass filter is used to filter the received voltage signal. It filters out high-frequency noise and high-order harmonics of the excitation signal through low-pass filtering, and filters out DC bias and extremely low-frequency noise from the previous stage through high-pass filtering. It also prevents high-frequency noise from aliasing into the baseband. At the same time, it amplifies the voltage signal to a level suitable for subsequent processing, and finally outputs the filtered voltage signal to the phase-sensitive detector.

[0025] The phase-sensitive detector is used to separate the amplitude and phase of the received voltage signal. The impedance component and capacitive reactance component are calculated by the multiplier in the phase-sensitive detector, and then averaged by the low-pass filter in the phase-sensitive detector before being output to the calculation module.

[0026] The weighing module uses a weighing sensor with a measurement accuracy of at least 0.01g. Its output is connected to the calculation module to detect the weight of the minced meat sample and output it to the calculation module.

[0027] The calculation module is specifically an MCU, which internally stores calculation models for various types of meat (such as pork, beef, and chicken). First, it converts the received analog signals of impedance and capacitive reactance components into digital signals. Then, based on the weight, impedance, and capacitive reactance components of the meat sample, and the type of meat sample, it calculates the fat percentage in the meat sample. The calculation model uses empirical formulas from Hanai mixing theory or the Cole-Cole model, specifically expressed as follows: Fat% = F(Z, W, Type) In the formula, Z is the measured complex impedance including impedance and capacitive reactance, W is the total weight of the minced meat sample, and Type is the type of minced meat sample.

[0028] In some embodiments, the microcontroller unit employs an ESP microcontroller module and is communicatively connected to an interactive display screen. The display screen is communicatively connected to the computing unit, such as... Figure 2 As shown.

[0029] The ESP microcontroller module, in addition to generating stable sine waves, integrates Wi-Fi and Bluetooth modules for communication with the display screen or third-party electronic devices, facilitating the output of control signals and the export of data. The display screen connects to the computing unit, allowing users to select the type of minced meat and view the calculation results (percentage of fat content and fat mass) output by the computing module.

[0030] In some embodiments, the device further includes a temperature sensor, the signal output of which is connected to a computing module for detecting the temperature signal of the minced meat sample and outputting it to the computing module, such as... Figure 3 As shown. The calculation model including temperature is represented by the following equation: Fat% = F(Z, W, Type, T) In the formula, Z is the measured complex impedance including impedance and capacitive reactance, W is the total weight of the minced meat sample, Type is the type of minced meat sample, and T is the temperature of the minced meat. The temperature T is optional; when the external connected device includes a temperature sensor, the detection accuracy can be further improved.

[0031] This application also discloses a method for detecting the fat content of minced meat, using a minced meat fat content detection device as described above, the method comprising the following steps: S1. Establish multiple detection models and store them in the computing unit; S2. Homogenize the meat sample to be tested into minced meat and place it on a weighing sensor to detect the weight of the minced meat; S3. Contact the electrode array with the two opposite sides of the minced meat, and detect the impedance and capacitive reactance of the minced meat after applying current; S4. Select the corresponding detection model according to the type of minced meat and calculate the fat content percentage.

[0032] In establishing the detection model, a large number of homogenized meat samples of the same species with different fat contents are collected to create breed models, such as whole models of pigs, cattle, and sheep. Alternatively, meat samples from different parts of the same species are collected to create refined models, such as models of pig hindquarters, chicken breast, and chicken leg. The impedance, capacitance, and weight of each meat sample are measured using the aforementioned device. Simultaneously, chemical analysis methods (such as Soxhlet extraction) are used as the gold standard to accurately determine the true fat content of each meat sample. The specific parameters of the function F in the above mathematical model are established using multiple linear regression or machine learning algorithms. Each type of meat (chicken, duck, pig) requires an independent model or different parameter settings.

[0033] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for detecting the fat content of minced meat, characterized in that, include: The power-on module is used to output a constant amplitude AC current signal to the electrode array; The electrode array, including a positive electrode array and a negative electrode array, has its input end connected to the power supply module, its output end connected to the signal conditioning module, and its detection end connected to both sides of the meat paste sample, for releasing current to the uniform meat paste sample. The signal conditioning module has its input end connected to the output end of the electrode array and its output end connected to the calculation module. It is used to collect the voltage signal of the minced meat sample, decompose the impedance component and capacitive reactance component of the minced meat sample, and output them to the calculation module. The weighing module, connected to the calculation module, is used to detect the weight of the minced meat sample and output the result to the calculation module. The calculation module is used to calculate the proportion of fat in the minced meat sample based on the weight, impedance component, capacitive component, and type of minced meat sample.

2. The meat fat content detection device according to claim 1, characterized in that, The power-on module includes: The microcontroller unit is used to output a stable 50Hz sine wave to the voltage-controlled current source circuit. A voltage-controlled current source circuit is used to convert a voltage signal into an AC current signal with a constant amplitude and output it to the electrode array.

3. The meat fat content detection device according to claim 2, characterized in that, The microcontroller unit is communicatively connected to an interactive display screen, which is communicatively connected to the computing unit.

4. The meat fat content detection device according to claim 2, characterized in that, The amplitude of the alternating current signal is 200μA~500μA.

5. The meat fat content detection device according to claim 1, characterized in that, The signal conditioning module includes: An instrumentation amplifier, connected to the electrode array, is used to acquire and amplify the voltage signal of the minced meat sample and output it to an active bandpass filter. An active bandpass filter is used to filter the received voltage signal and output the filtered voltage signal to a phase-sensitive detector. A phase-sensitive detector is used to separate the amplitude and phase of the received voltage signal, calculate the impedance and capacitive reactance components, and output them to the calculation module.

6. The meat fat content detection device according to claim 1, characterized in that, The device also includes a temperature sensor, whose signal output is connected to the computing module to detect the temperature signal of the minced meat sample and output it to the computing module.

7. A method for detecting the fat content of minced meat, using the minced meat fat content detection device as described in any one of claims 1 to 6, characterized in that, The method includes the following steps: S1. Establish multiple detection models and store them in the computing unit; S2. Homogenize the meat sample to be tested into minced meat and place it on a weighing sensor to detect the weight of the minced meat; S3. Contact the electrode array with the two opposite sides of the minced meat, and detect the impedance and capacitive reactance of the minced meat after applying current; S4. Select the corresponding detection model according to the type of minced meat and calculate the fat content percentage.

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