Rapid food detection device for on-site sampling and on-site detection

Abstract

The utility model discloses a rapid food detection device for on-site sampling and on-site detection, which comprises a detection box, the detection box is provided with a detection chamber with a built-in gas sensor, and the detection chamber is provided with a gas inlet and a gas outlet; an air exhaust power part is further arranged in the detection chamber, the air inlet is in butt joint with an air inlet valve through an air inlet pipe, the air outlet end of the air inlet pipe is in butt joint with the air inlet end of the air exhaust power part, the air inlet valve is connected with an air collecting cover covering the local area of the surface of the to-be-detected food, and the air outlet is in butt joint with an exhaust valve through an exhaust pipe; the detection chamber sucks in flowing gas through power provided by the air exhaust power part, and when the air inlet valve and the exhaust valve are fully closed, the detection chamber is in a sealed and closed state. According to the food smell detection device, the efficiency and the accuracy of food smell detection are improved by carrying out local flowing gas suction and closed gas detection on food to be detected.

Description

Technical Field

[0001] This utility model belongs to the field of food odor detection technology, and in particular relates to a rapid food detection device for on-site sampling and testing. Background Technology

[0002] Developed countries abroad have seen rapid development in rapid testing technologies and products for grains, meat, eggs, and dairy products, with the vast majority of globally renowned rapid testing product manufacturers located in the EU and the US. Domestically, the promotion and application of rapid testing technologies and information technology are at a critical stage of overcoming difficulties. Food safety rapid testing technologies are developing towards automation, portability, and intelligence. While odor detection can determine whether food has spoiled, when spoilage is recent and minor, the differences are very small, making accurate identification and judgment difficult solely by human smell. Therefore, there is an urgent need to design a detection device that identifies food spoilage based on odor capture, enabling rapid on-site food safety testing based on smell alone. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a rapid food testing device for on-site sampling and testing. By performing localized flowable gas inhalation and closed-air testing on the food to be tested, the efficiency and accuracy of food odor detection are improved.

[0004] Technical solution: To achieve the above objectives, this utility model provides a rapid food testing device for on-site sampling and testing, comprising a testing box, the testing box having a testing chamber with a built-in gas sensor, and the testing chamber being provided with an air inlet and an air outlet;

[0005] The testing chamber is also equipped with a built-in air extraction power unit. The air inlet is connected to an air inlet valve via an air inlet pipe. The air outlet of the air inlet pipe is connected to the air inlet of the air extraction power unit. The air inlet valve is connected to an air collection hood that covers a local area of ​​the surface of the food to be tested. The air outlet is connected to an exhaust valve via an exhaust pipe.

[0006] The testing chamber is powered by a suction power unit to draw in flowing gas, and when the inlet valve and exhaust valve are fully closed, the testing chamber is in a sealed, airtight state.

[0007] Furthermore, the gas collection hood has gas collection holes on its body, and the hood opening covering a local area of ​​the surface of the food to be tested is a large hood opening, with a sealing ring provided on the large hood opening.

[0008] Furthermore, an air nozzle is provided inside the air collection hood, which is connected to the air collection hole. The air nozzle extends toward the large opening of the air collection hood so that the collected external gas is sprayed through the air nozzle onto the food to be tested covered by the air collection hood.

[0009] Furthermore, an inner support plate is installed inside the detection box, which divides the internal space of the detection box into an upper and lower equipment chamber and a detection chamber. The equipment chamber is equipped with a control main board and a power supply that are electrically connected.

[0010] Furthermore, the gas sensor is a gas sensor array connected to the control motherboard for signal transmission, and the gas sensor array is mounted on the inner support plate so that its detection part extends into the detection chamber.

[0011] Furthermore, the detection box has a cover, the control motherboard is installed inside the cover, and a display screen connected to the control motherboard is embedded on the top surface of the cover.

[0012] Furthermore, the exhaust valve is located on the front side of the detection box, the gas collection hood is located below the detection box, and handles are symmetrically arranged on the left and right sides of the gas collection hood.

[0013] Furthermore, the air extraction power unit, the intake valve, and the exhaust valve are each controlled by the main control board.

[0014] Beneficial effects: When testing food, this utility model uses a gas collection hood to partially cover the food, which allows for sufficient contact between the gas and the food, thereby obtaining a more accurate gas sample and improving the accuracy of the test. As the gas sample continues to flow, after a certain period of time, the gas extraction power unit, the inlet valve, and the exhaust valve are closed, thereby sealing the gas sample in the test chamber. As the gas sample area stabilizes, the subsequent test results can be more accurate, enabling rapid on-site food testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the detection box.

[0018] Figure 4 This is a schematic diagram of a half-section of the air intake hood. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 , Figure 2 as well as Figure 3As shown, a rapid food testing device for on-site sampling and testing includes a testing box 1. The testing box 1 has a testing chamber 4 with a built-in gas sensor 2. The testing chamber 4 is provided with an air inlet 4a and an air outlet 4b. The testing chamber 4 also has a built-in suction power unit 3. The air inlet 4a is connected to an air inlet valve 6 through an air inlet pipe 5. The air outlet end of the air inlet pipe 5 is connected to the air inlet end of the suction power unit 3. The air inlet valve 6 is connected to a gas collection hood 9 that covers a local area of ​​the surface of the food to be tested. The air outlet 4b is connected to an exhaust valve 8 through an exhaust pipe 7. The testing chamber 4 is powered by the suction power unit 3 to draw in flowing gas, and when the air inlet valve 6 and the exhaust valve 8 are fully closed, the testing chamber 4 is in a sealed and airtight state. In food testing, a gas sample of the food to be tested is first inhaled. A gas collection hood 9 is used to partially cover the food, ensuring sufficient contact between the gas and the food, thus obtaining a more accurate gas sample and improving testing accuracy. As the gas sample continues to move, odor detection is performed in real time by a gas sensor 2. Because the gas sample is in a flowing state, its stability is insufficient and it is prone to impacting the gas sensor 2, leading to errors in the detection results. Therefore, after a certain period, the suction power unit 3, the inlet valve 6, and the exhaust valve 8 are closed, sealing the gas sample within the detection chamber 4. Only when the gas sample area stabilizes can subsequent detection results be more accurate. In summary, this invention improves the efficiency and accuracy of food odor detection by locally inhaling flowing gas and performing closed-loop detection on the food to be tested.

[0021] The purpose of setting up the gas collection hood 9 is to allow the outside gas to fully contact the food, obtain a sufficient gas sample of odor, and thus improve the accuracy of odor detection. To further improve the accuracy of odor detection, in this invention, such as... Figure 4 As shown, the gas collecting hood 9 has gas collecting holes 90 on its body. A nozzle 91 is connected to the gas collecting holes 90 and located inside the gas collecting hood 9. The nozzle 91 extends towards the large opening of the gas collecting hood 9, allowing collected external gas to be sprayed through the nozzle 91 onto the food to be tested, which is covered by the gas collecting hood 9. The large opening of the gas collecting hood 9, covering a localized area of ​​the food surface, is fitted with a sealing ring 10. Gas is drawn in through the gas collecting holes 90 and sprayed onto the food to be tested through the nozzle 91, thus fully capturing the food's odor and forming a more accurate gas sample. The sealing ring 10 improves the airtightness of the large opening of the gas collecting hood 9 in contact with the food.

[0022] like Figure 1 , Figure 2 as well as Figure 3As shown, the detection box 1 is equipped with an inner support plate 11, which divides the internal space of the detection box 1 into an upper and lower equipment chamber 12 and a detection chamber 4. The equipment chamber 12 contains a control main board 13 and a power supply 14, which are electrically connected. The power supply 14 is mounted on the inner support plate 11. The gas sensor 2 is a gas sensor array connected to the control main board 13 for signal transmission. The gas sensor array is mounted on the inner support plate 11 so that its detection part extends into the detection chamber 4. The detection box 1 has a cover 17. The control main board 13 is mounted inside the cover 17, and a display screen 15 connected to the control main board 13 is embedded on the top surface of the cover 17. The exhaust valve 8 is located at the front of the detection box 1, and the gas collection hood 9 is located below the detection box 1. Handles 16 are symmetrically arranged on the left and right sides of the gas collection hood 9. The suction power unit 3, the inlet valve 6, and the exhaust valve 8 are controlled by the control main board 13. The suction power unit 3 is a suction pump, and the inlet valve 6 and the exhaust valve 8 are both electric valves. The principle behind using gas sensor arrays to identify odors is roughly as follows: each sensor has a different sensitivity to a specific gas. For example, one sensor might be particularly sensitive to gas number one, producing a strong signal, while reacting weakly to other gases. Similarly, another sensor might be particularly sensitive to gas number two, but perform poorly on gas number one. This characteristic means that each sensor's response to different gases is unique. Within the entire sensor array, each sensor's response to different gases constitutes a unique "response profile." Gas number one will produce a strong signal on some sensors, while the signal will be weaker on others; gas number two will produce a strong signal on other sensors. These differences in response profiles are key to identifying different gases. By analyzing the response patterns of these sensors, the system can distinguish and identify different gases. In short, the gas sensor array distinguishes and identifies various gases through the unique response patterns of each sensor to a specific gas, and the response profiles of each sensor collectively constitute a complex identification system.

[0023] This invention enables rapid on-site food safety testing by collecting and analyzing gaseous samples of the odor contained in food. It can determine whether food is spoiled or deteriorated, and can be applied to the testing of meat, eggs, milk, and other foods, improving the accuracy and efficiency of food testing. It is suitable for large-scale promotion and application.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A rapid food testing device for on-site sampling and testing, comprising a testing box (1), the testing box (1) having a testing chamber (4) with a built-in gas sensor (2), the testing chamber (4) being provided with an air inlet (4a) and an air outlet (4b). Its features are: The testing chamber (4) is also equipped with a vacuum power unit (3). The air inlet (4a) is connected to an air inlet valve (6) via an air inlet pipe (5). The air outlet of the air inlet pipe (5) is connected to the air inlet of the vacuum power unit (3). The air inlet valve (6) is connected to a gas collection hood (9) that covers a local area of ​​the surface of the food to be tested. The air outlet (4b) is connected to an exhaust valve (8) via an exhaust pipe (7). The detection chamber (4) is powered by the suction power unit (3) to draw in flowing gas, and when the inlet valve (6) and the exhaust valve (8) are fully closed, the detection chamber (4) is in a sealed and airtight state.

2. The rapid food testing device for on-site sampling and testing according to claim 1, characterized in that: The gas collection hood (9) has gas collection holes (90) on its body. The gas collection hood (9) covers a local area of ​​the surface of the food to be tested with a large opening and a sealing ring (10) is provided on the large opening.

3. The rapid food testing device for on-site sampling and testing according to claim 2, characterized in that: A nozzle (91) is provided inside the gas collection hood (9) and connected to the gas collection hole (90). The nozzle (91) extends toward the large opening of the gas collection hood (9) so that the collected external gas is sprayed through the nozzle (91) onto the food to be tested covered by the gas collection hood (9).

4. The rapid food testing device for on-site sampling and testing according to claim 1, characterized in that: The detection box (1) is equipped with an inner support plate (11), which divides the internal space of the detection box (1) into an upper and lower equipment chamber (12) and the detection chamber (4). The equipment chamber (12) is equipped with an electrically connected control main board (13) and power supply (14).

5. A rapid food testing device for on-site sampling and testing according to claim 4, characterized in that: The gas sensor (2) is a gas sensor array that is connected to the control motherboard (13) for signal transmission. The gas sensor array is mounted on the inner support plate (11) so that its detection part extends into the detection chamber (4).

6. The rapid food testing device for on-site sampling and testing according to claim 4, characterized in that: The detection box (1) has a cover (17), the control motherboard (13) is installed inside the cover (17), and the top surface of the cover (17) is fitted with a display screen (15) connected to the control motherboard (13).

7. A rapid food testing device for on-site sampling and testing according to claim 4, characterized in that: The exhaust valve (8) is located in front of the detection box (1), and the gas collection hood (9) is located below the detection box (1). The gas collection hood (9) has handles (16) symmetrically arranged on the left and right sides.

8. A rapid food testing device for on-site sampling and testing according to claim 7, characterized in that: The air extraction power unit (3), the air intake valve (6) and the exhaust valve (8) are controlled by the control main board (13).

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