Portable detection device for multi-temperature-state freshness of livestock and poultry meat
By designing a portable detection device that combines a temperature sensor and a gas sensor, the problems of time-consuming, complex and costly freshness detection of refrigerated and frozen livestock and poultry meat in the existing technology are solved, and a fast and accurate freshness assessment is achieved.
Patent Information
- Application Number
- CN202510873913.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-09-12
AI Technical Summary
Existing technologies for testing the freshness of refrigerated and frozen livestock and poultry meat have the problems of being time-consuming, requiring destructive sampling, complex operations, high costs, and difficulty in achieving rapid on-site testing.
A portable detection device was designed, which combined refrigeration temperature sensors, freezing temperature sensors and gas sensors. Data processing and analysis were performed through a control chip to achieve real-time detection and evaluation of the freshness of refrigerated and frozen livestock and poultry meat.
The device is easy to carry and easy to operate. It can quickly and accurately evaluate the freshness of refrigerated and frozen livestock and poultry meat, reducing testing costs and improving testing efficiency and the reliability of results.
Smart Images
Figure CN120629093A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of food detection, and in particular to a portable device for detecting the multi-temperature freshness of livestock and poultry meat. Background Art
[0002] The advantages of refrigerated and frozen meat in storage time and scale generally result in lower prices than similar products in ambient or fresh-cooled formats, but producers and sellers have the opportunity to reap greater profits. With the continued advancement of consumption upgrades, the market for refrigerated and frozen livestock and poultry meat is expected to experience faster growth. Potential food safety issues associated with refrigerated and frozen livestock and poultry meat include risks such as microbial contamination, color change, nutrient loss, and heavy metal and veterinary drug residues. Microbial contamination is a fundamental cause of meat spoilage, especially when the cold chain is disrupted or incomplete. Frozen meat products are highly susceptible to spoilage and color change. Therefore, ensuring the food quality of refrigerated and frozen livestock and poultry meat depends on superior testing technologies. Traditional testing technologies for refrigerated and frozen meat primarily include chemical, microbiological, and physical methods. Chemical testing involves titration and colorimetry, using calculations to quantitatively analyze the components being tested. Microbiological testing assesses the hygienic condition of meat by culturing and observing microbial growth. Physical testing may include evaluating physical properties such as color, texture, and odor. These traditional detection methods provide a fundamental guarantee for food safety. However, with the advancement of science and technology, modern detection technologies such as molecular biology, immunology, spectroscopy, and electronic noses offer faster, more accurate, and more efficient detection methods. While mature, many traditional methods, such as microbial culture and physical and chemical analysis, have limited detection capabilities for emerging hazardous substances, particularly low-concentration contaminants and emerging biotoxins, which are difficult to accurately identify. Furthermore, these traditional detection methods often require complex sample preparation and long analysis times, resulting in low detection efficiency and potentially impacting the timeliness of food production and distribution. Secondly, the sensitivity and specificity of traditional detection technologies are generally insufficient, which can lead to missed detections or false positives of contaminants, thus creating food safety risks. Finally, many traditional detection methods utilize outdated equipment that cannot meet the requirements of modern food safety testing, limiting the reliability and validity of test results. Fluorescence spectroscopy offers several advantages over traditional methods for testing refrigerated and frozen meat: First, spectroscopy provides a non-contact, non-destructive detection method. Compared to traditional destructive methods, this avoids sample loss and maintains sample integrity. Secondly, fluorescence spectroscopy offers a rapid response time, enabling rapid testing. This is particularly important when assessing the quality of refrigerated and frozen meat. Furthermore, fluorescence spectroscopy provides highly accurate results and can analyze multiple components simultaneously, providing a more comprehensive understanding of a sample's quality and safety. Furthermore, fluorescence spectroscopy offers cost-effectiveness, reducing labor and reagent consumption due to its rapid and efficient testing capabilities.
[0003] Traditional methods for testing refrigerated and frozen livestock and poultry meat are not only time-consuming and increase the testing cycle, but also often require destructive sampling, which makes it impossible to preserve the original samples. The operation is complicated and requires professional technicians to operate. The cost is high and it is difficult to achieve rapid on-site testing, which limits its application in rapid response and large-scale screening. Summary of the Invention
[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a portable detection device for the multi-temperature freshness of livestock and poultry meat.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] A portable device for detecting the freshness of livestock and poultry meat at multiple temperatures, comprising:
[0007] main body;
[0008] a display screen, which is arranged on the top of the main body;
[0009] A storage bucket, the storage bucket being fixedly connected to the lower end of the main body via a connecting plate;
[0010] A temperature detection module, comprising a refrigeration temperature sensor and a freezing temperature sensor, which are respectively arranged on both sides of the storage barrel;
[0011] A gas collection and analysis module, comprising a gas collection probe, a control chip, and a gas sensor. The gas collection probe is disposed at the bottom of the storage barrel, and the control chip and the gas sensor are disposed in the middle of the inner wall of the storage barrel.
[0012] The control module includes a gas collection and analysis mode button and a gas discharge mode button, and is arranged on a side surface of the outer wall of the main body.
[0013] Preferably, the display screen is electrically connected to the control chip and the gas sensor, and the display screen is used to display the freshness and spectrum information of frozen and refrigerated livestock and poultry meat.
[0014] Preferably, the refrigeration temperature sensor and the freezing temperature sensor can determine the refrigeration temperature and freezing temperature of livestock and poultry meat under refrigeration and freezing storage conditions. The collected refrigeration and freezing temperatures of livestock and poultry meat are collected and processed by the control chip. The control chip is electrically connected to the display screen, and the display screen displays the refrigeration and freezing temperatures of the refrigerated and frozen livestock and poultry meat in real time.
[0015] Preferably, the regulation module is electrically connected to the control chip, and the regulation module enables the control chip to process and analyze the gas information of refrigerated and frozen livestock and poultry meat through mode switching, and the display screen displays the odor information of refrigerated and frozen livestock and poultry meat in real time.
[0016] Preferably, the inner wall of the storage barrel is sealed and slidably connected to two pistons, and a storage chamber is formed between the side walls of the two pistons close to each other and the inner wall of the storage barrel. The top and the bottom of the storage barrel are fixedly connected to electric push rods, and the movable end of the electric push rod is fixedly connected to the corresponding piston side wall. Two exhaust holes are provided on the inner wall of the storage chamber, and the control chip and the gas sensor are both located in the storage chamber.
[0017] Preferably, the inner wall of the storage chamber is connected to the gas collection probe through a one-way suction pipe, and the two exhaust holes are symmetrical in number and position. Solenoid valves are provided in the two exhaust holes, and the two solenoid valves are electrically connected to the control chip. When the gas discharge mode button is selected, the solenoid valves in the two exhaust holes are energized and opened, and the gas in the storage chamber is discharged through the two exhaust holes. The two electric push rods drive the two pistons to move up and down, mobilizing the suction effect of the storage chamber to realize the collection, detection and discharge of gases from refrigerated and frozen livestock and poultry meat.
[0018] Preferably, the gas collection and analysis mode button is selected, the two electric push rods drive the two pistons away from each other, and the gas collection probe collects gas information of refrigerated and frozen livestock and poultry meat. The gas discharge mode button is selected, the two electric push rods drive the two pistons close to each other, so that a pressure difference is formed between the gas collected in the storage chamber and the external environment, and the gas flows out. The data collected by the gas sensor and the gas collection probe will be summarized in the control chip, and the control chip will perform discrimination and analysis on the freshness of refrigerated and frozen livestock and poultry meat. The control chip displays the freshness data of refrigerated and frozen livestock and poultry meat on the display screen through electrical connection.
[0019] Preferably, the control chip is embedded with a wireless communication module, which can be connected to external electronic devices for online observation.
[0020] Preferably, a fluorescence sensor is provided in the main body, and the fluorescence sensor can detect and analyze the fluorescence changes of the meat sample. The fluorescence sensor is electrically connected to a display screen, and the display screen visualizes the fluorescence spectrum information of the meat sample to be tested. The fluorescence sensor can not only detect the change of the fluorescence intensity of the meat sample to be tested, but also provide multiple parameters such as fluorescence lifetime, emission and excitation spectra, thereby providing more comprehensive data analysis for the freshness assessment of the meat sample to be tested.
[0021] Compared with the existing technology, the advantages of the present invention are:
[0022] 1. The present invention is a handheld device that is portable, easy to operate, and compact. It greatly improves the convenience and practicality of detecting the freshness of frozen and refrigerated livestock and poultry meat, and can meet the needs of consumers and stakeholders for integrated, instant detection of the freshness of frozen and refrigerated livestock and poultry meat in their daily production and life.
[0023] 2. The present invention uses refrigerated temperature sensors and frozen temperature sensors to detect and determine the temperature of frozen and chilled livestock and poultry meat. Compared with infrared temperature sensors, refrigerated temperature sensors and frozen temperature sensors have lower costs, can adapt to humid and temperature-changing environments, can work at a specific temperature for a long time, have strong durability, can provide higher measurement accuracy within a certain temperature measurement range, and are easy to install and maintain.
[0024] 3. The present invention adopts a detection method that combines a gas sensor with a refrigerated temperature sensor and a frozen temperature sensor, which can comprehensively and objectively evaluate the freshness of frozen and refrigerated livestock and poultry meat. Specifically, the collected gas is collected by a gas collection probe and a gas sensor in the storage cavity to collect gas information, and the refrigerated temperature sensor and the frozen temperature sensor detect and determine the temperature of frozen and refrigerated livestock and poultry meat. Combined with the control chip, the freshness of frozen and refrigerated livestock and poultry meat can be comprehensively judged.
[0025] 4. The control chip is embedded with a wireless communication module, and the comprehensive information on the freshness of frozen and refrigerated livestock and poultry meat can be observed online by other electronic devices in addition to the display screen, greatly improving the convenience of detection.
[0026] 5. This invention utilizes a combination of a gas collection probe, a storage chamber, and a vent. To ensure the accuracy and reliability of test results, the system precisely triggers a gas discharge mode via a control chip after gas detection, forcing residual gas to escape through the vent. This process completely expels residual gas, eliminating its potential impact on subsequent testing. This design not only improves the stability and repeatability of freshness testing for frozen and refrigerated livestock and poultry meat, but also makes test results more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the structure of a portable device for detecting the freshness of livestock and poultry meat at multiple temperatures proposed by the present invention;
[0028] Figure 2 for Figure 1 Schematic diagram of the vertical cross-section structure on the left.
[0029] In the figure: 1. Main body; 2. Display screen; 3. Storage bucket; 4. Piston; 5. Storage chamber; 6. Electric push rod; 7. Gas collection probe; 8. Refrigeration temperature sensor; 9. Exhaust hole; 10. Gas collection and analysis mode button; 11. Gas discharge mode button; 12. Freezing temperature sensor; 13. Control chip; 14. Gas sensor; 15. One-way suction pipe; 16. Fluorescence sensor. DETAILED DESCRIPTION
[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0031] Reference Figure 1-Figure 2 , a portable detection device for the multi-temperature freshness of livestock and poultry meat, comprising a main body 1;
[0032] The display screen 2 is arranged on the top of the main body 1. The main body 1 is designed as a cylindrical structure, which is convenient for users to hold in hand. The surface of the main body 1 is covered with anti-slip material to ensure a stable grip even in a humid environment. In addition, the outer shell of the main body 1 is made of environmentally friendly materials, which not only ensures durability but also is easy to clean, and meets the hygiene standards of food testing sites. The display screen 2 is set to a touch screen. The touch screen allows users to slide, click and perform other operations directly on the screen, reducing the learning cost and making the operation more convenient and quick. In addition, the touch screen reduces the use of physical buttons in the control module to a certain extent, which can reduce the mechanical wear problem of physical buttons caused by long-term use. Furthermore, the interface lock of the display screen can be set during the detection process, and the test will not be affected by accidentally touching the display screen during the test, while the real-time detection data of the visual detection screen can still be displayed.
[0033] The storage bucket 3 is fixedly connected to the lower end of the main body 1 through a connecting plate;
[0034] The temperature detection module includes a refrigeration temperature sensor 8 and a freezing temperature sensor 12, which are respectively arranged on both sides of the storage barrel 3;
[0035] The gas collection and analysis module includes a gas collection probe 7, a control chip 13 and a gas sensor 14. The gas collection probe 7 is arranged at the bottom of the storage barrel 3, and the control chip 13 and the gas sensor 14 are arranged in the middle of the inner wall of the storage barrel 3.
[0036] Furthermore, the gas collection probe 7 can be equipped with a dust cover, which can effectively prevent dust and impurities from entering the device through the exhaust hole when not in use, ensuring the normal operation of the device and extending its service life. It also reduces the entry of foreign matter such as dust, chips, and hard sand into the gas collection probe 7, reduces the wear of these hard granular foreign matter on precision components such as the detection holes and gas collection holes in the gas collection probe 7, and maintains the precision of the instrument.
[0037] The control module includes a gas collection and analysis mode button 10 and a gas discharge mode button 11 , which are arranged on a side surface of the outer wall of the main body 1 .
[0038] The display screen 2 is electrically connected to the control chip 13 and the gas sensor 14 , and is used to display the freshness and spectrum information of frozen and refrigerated livestock and poultry meat.
[0039] The refrigeration temperature sensor 8 and the freezing temperature sensor 12 can determine the refrigeration temperature and freezing temperature of livestock and poultry meat under refrigeration and freezing storage conditions. The collected refrigeration and freezing temperatures of livestock and poultry meat are collected and processed by the control chip 13. The control chip 13 is electrically connected to the display screen 2, and the display screen 2 displays the refrigeration and freezing temperatures of the refrigerated and frozen livestock and poultry meat in real time.
[0040] Furthermore, the target temperature range of the refrigerated temperature sensor 8 is set to 0-8°C, and the target temperature range of the frozen temperature sensor 12 is set to be less than or equal to -18°C. In the process of detecting the freshness of frozen and refrigerated livestock and poultry meat, the refrigerated temperature sensor 8 and the frozen temperature sensor 12 collect the temperature information of refrigerated and frozen livestock and poultry meat. Temperature is one of the important indicators for judging its freshness. By collecting the temperature data of food in real time, it can be preliminarily determined whether the meat sample is in a refrigerated or frozen state, and the control chip 13 selects the corresponding detection program to analyze the meat sample.
[0041] It should be noted that the control chip 13 analyzes the freshness of refrigerated and frozen meat based on the temperature and gas information collected by the refrigerated temperature sensor 8, the frozen temperature sensor 12, and the gas sensor 14. First, it collects data on the odor components, their concentrations, and temperatures of the meat at room temperature, refrigeration, and freezing. Based on this data, it plots unique temperature-odor variation characteristic curves. These curves are then systematically organized and categorized to construct a comprehensive odor-temperature database for the freshness of meat. This database not only records the odor and temperature data of meat at room temperature, refrigeration, and freezing, but also provides in-depth insight into the changes in the freshness of refrigerated and frozen meat.
[0042] While monitoring and analyzing the odor and temperature of refrigerated and frozen livestock and poultry meat, the control chip 13 extracts and analyzes the temperature and odor of a new meat sample and compares this data with reference samples in the database. This comparative analysis assesses the freshness of the test sample and its similarity to the reference samples, thereby determining its freshness level. The freshness information of the test sample is displayed in real time on the display screen 2.
[0043] The control module is electrically connected to the control chip 13. By switching the modes, the control module enables the control chip 13 to process and analyze the gas information of refrigerated and frozen livestock and poultry meat, and the display screen 2 displays the odor information of refrigerated and frozen livestock and poultry meat in real time.
[0044] Two pistons 4 are sealed and slidably connected to the inner wall of the storage barrel 3. A storage chamber 5 is formed between the side walls of the two pistons 4 close to each other and the inner wall of the storage barrel 3. The top and bottom of the storage barrel 3 are fixedly connected to electric push rods 6. The movable ends of the electric push rods 6 are fixedly connected to the corresponding side walls of the pistons 4. Two exhaust holes 9 are opened on the inner wall of the storage chamber 5. The control chip 13 and the gas sensor 14 are both located in the storage chamber 5.
[0045] The inner wall of the storage chamber 5 is connected to the gas collection probe 7 through a one-way suction pipe 15. The two exhaust holes 9 are symmetrical in number and position. Solenoid valves are provided in the two exhaust holes 9. The two solenoid valves are electrically connected to the control chip 13. When the gas discharge mode button 11 is selected, the solenoid valves in the two exhaust holes 9 are energized and opened, and the gas in the storage chamber 5 is discharged through the two exhaust holes 9. The two electric push rods 6 drive the two pistons 4 to move up and down, mobilizing the suction effect of the storage chamber 5 to realize the collection, detection and discharge of gases from refrigerated and frozen livestock and poultry meat.
[0046] Select the gas collection and analysis mode button 10, the two electric push rods 6 drive the two pistons 4 away from each other, and the gas collection probe 7 collects the gas information of refrigerated and frozen livestock and poultry meat. Select the gas discharge mode button 11, the two electric push rods 6 drive the two pistons 4 close to each other, so that a pressure difference is formed between the gas collected in the storage chamber 5 and the external environment, and the gas flows out. The data collected by the gas sensor 14 and the gas collection probe 7 will be summarized in the control chip 13, and the control chip 13 will distinguish and analyze the freshness of refrigerated and frozen livestock and poultry meat. The control chip 13 displays the freshness data of refrigerated and frozen livestock and poultry meat on the display screen 2 through electrical connection.
[0047] The control chip 13 is embedded with a wireless communication module, which can be connected to external electronic devices for online observation.
[0048] The gas collection probe 7 can perform fluorescence detection on refrigerated and frozen livestock and poultry meat. A fluorescence sensor 16 is provided in the main body 1. The fluorescence sensor 16 can detect and analyze the fluorescence changes of the meat sample. The fluorescence sensor 16 is electrically connected to the display screen 2. The display screen 2 visualizes the fluorescence spectrum information of the meat sample to be tested. The fluorescence sensor 16 can not only detect the changes in the fluorescence intensity of the meat sample to be tested, but also provide multiple parameters such as fluorescence lifetime, emission and excitation spectra, providing more comprehensive data analysis for the freshness evaluation of the meat sample to be tested.
[0049] When the portable detection device of the present invention is used, the hand holds the main body 1, and the present invention is placed close to but not in contact with the refrigerated or frozen livestock and poultry meat sample to be tested, and the gas collection and analysis mode button 10 is pressed. The gas collection probe 7 starts to collect the gas of the meat sample to be tested, and the refrigerated temperature sensor 8 and the frozen temperature sensor 12 start to detect the temperature of the meat sample to be tested. At the same time, fluorescence detection is performed in the gas collection probe 7. At this time, the two electric push rods 6 drive the two pistons 4 away from each other, so that the gas enters the storage chamber 5 through the one-way suction pipe 15. The gas collection probe 7 and the gas sensor 14 in the storage chamber 5 analyze the collected gas information, and the gas sensor 14 and the refrigerated temperature sensor 8 The refrigeration temperature sensor 12 extracts and processes the smell and temperature information data of the collected meat samples to be tested, and the control chip 13 receives and further processes the electrical signals from the gas sensor 14, the refrigeration temperature sensor 8, and the freezing temperature sensor 12. The control chip 13 is electrically connected to the display screen 2, and the display screen 2 displays the freshness and fluorescence change information of the refrigerated and frozen livestock and poultry meat samples to be tested in real time; after the detection is completed, press the gas discharge mode button 11 to select the gas discharge mode, and the solenoid valves in the two exhaust holes 9 are energized and opened, and the two electric push rods 6 drive the two pistons 4 to approach each other, so that a pressure difference is formed between the gas collected in the storage chamber 5 and the external environment, and the gas flows out from the exhaust hole 9.
[0050] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.
Claims
1. A portable device for detecting the freshness of livestock and poultry meat at multiple temperatures, characterized in that: include: Subject (1); A display screen (2) is provided on the top of the main body (1); A storage bucket (3), wherein the storage bucket (3) is fixedly connected to the lower end of the main body (1) via a connecting plate; A temperature detection module, the temperature detection module comprising a refrigeration temperature sensor (8) and a freezing temperature sensor (12), which are respectively arranged on both sides of the storage barrel (3); A gas collection and analysis module, comprising a gas collection probe (7), a control chip (13) and a gas sensor (14), wherein the gas collection probe (7) is arranged at the bottom of the storage barrel (3), and the control chip (13) and the gas sensor (14) are arranged at the middle of the inner wall of the storage barrel (3); The control module includes a gas collection and analysis mode button (10) and a gas discharge mode button (11), which are arranged on a side surface of the outer wall of the main body (1).
2. A portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 1, characterized in that: The display screen (2) is electrically connected to a control chip (13) and a gas sensor (14), and the display screen (2) is used to display the freshness and spectrum information of frozen and refrigerated livestock and poultry meat.
3. A portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 2, characterized in that: The refrigeration temperature sensor (8) and the freezing temperature sensor (12) can determine the refrigeration temperature and freezing temperature of livestock and poultry meat under refrigeration and freezing storage conditions. The collected refrigeration and freezing temperatures of the livestock and poultry meat are collected and processed by the control chip (13). The control chip (13) is electrically connected to the display screen (2), and the display screen (2) displays the refrigeration and freezing temperatures of the refrigerated and frozen livestock and poultry meat in real time.
4. The portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 1, characterized in that: The control module is electrically connected to the control chip (13). The control module enables the control chip (13) to process and analyze the gas information detected by the refrigerated and frozen livestock and poultry meat through mode switching, and the display screen (2) displays the odor information of the refrigerated and frozen livestock and poultry meat in real time.
5. The portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 1, characterized in that: The inner wall of the storage barrel (3) is sealed and slidably connected to two pistons (4); a storage chamber (5) is formed between the side walls of the two pistons (4) that are close to each other and the inner wall of the storage barrel (3); the top and bottom of the storage barrel (3) are fixedly connected to electric push rods (6); the movable ends of the electric push rods (6) are fixedly connected to the side walls of the corresponding pistons (4); two exhaust holes (9) are provided on the inner wall of the storage chamber (5); and the control chip (13) and the gas sensor (14) are both located in the storage chamber (5).
6. A portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 5, characterized in that: The inner wall of the storage chamber (5) is connected to the gas collection probe (7) through a one-way suction pipe (15), and the two exhaust holes (9) are symmetrical in number and position. Solenoid valves are provided in the two exhaust holes (9), and the two solenoid valves are electrically connected to the control chip (13). When the gas discharge mode button (11) is selected, the solenoid valves in the two exhaust holes (9) are powered on and opened, and the gas in the storage chamber (5) is discharged through the two exhaust holes (9). The two electric push rods (6) drive the two pistons (4) to move up and down, mobilizing the suction effect of the storage chamber (5), thereby realizing the collection, detection and discharge of gas from refrigerated and frozen livestock and poultry meat.
7. The portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 5, characterized in that: When the gas collection and analysis mode button (10) is selected, the two electric push rods (6) drive the two pistons (4) away from each other, and the gas collection probe (7) collects gas information of refrigerated and frozen livestock and poultry meat. When the gas discharge mode button (11) is selected, the two electric push rods (6) drive the two pistons (4) closer to each other, so that the gas collected in the storage chamber (5) forms a pressure difference with the external environment and flows out. The data collected by the gas sensor (14) and the gas collection probe (7) will be summarized in the control chip (13). The control chip (13) performs discrimination analysis on the freshness of refrigerated and frozen livestock and poultry meat. The control chip (13) displays the freshness data of refrigerated and frozen livestock and poultry meat on the display screen (2) through electrical connection.
8. The portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 1, characterized in that: The control chip (13) is embedded with a wireless communication module, which can be connected to external electronic devices for online observation.
9. The portable device for detecting the freshness of livestock and poultry meat at multiple temperatures according to claim 1, characterized in that: A fluorescence sensor (16) is provided in the main body (1), and the fluorescence sensor (16) is capable of detecting and analyzing fluorescence changes of a meat sample. The fluorescence sensor (16) is electrically connected to a display screen (2), and the display screen (2) visualizes fluorescence spectrum information of the meat sample to be tested. The fluorescence sensor (16) is capable of not only detecting changes in fluorescence intensity of the meat sample to be tested, but also providing multiple parameters such as fluorescence lifetime, emission and excitation spectra, thereby providing more comprehensive data analysis for freshness evaluation of the meat sample to be tested.