Intelligent reserved food sample checking device and method

Abstract

The invention provides an intelligent food sample reserving and checking device and method for solving the problems that in the large-scale dish sample reserving process of group meal enterprises, due to the fact that oil gas and water vapor emitted by hot dishes affect automatic induction and sanitary safety of equipment, cold dishes, hot dishes, soup food and staple food are difficult to automatically recognize and the like. Different types of food materials can be adapted and identified, and information output labels can be input; the main functional modules of the device comprise a shell, a weighing module, a control and processor module, an image acquisition module, a dish sensing module and a cleaning and disinfecting module. The device can enable the image acquisition module to obtain higher identification accuracy, and can identify, record and output labels on a large scale of dishes in a short time.

Description

Technical Field

[0001] The present invention relates to the technical field of group meal food sample retention, and more specifically, to an intelligent sample retention and recording device and method for a large number of group meal dishes. Background Art

[0002] Food sample retention is an important part of the food safety supervision of group meals. As an effective supervision means, food sample retention technology provides an important basis for food safety traceability, quality assessment, and liability determination by retaining a certain number of food samples.

[0003] Currently, for group meal enterprises with large-scale operations, there are hundreds of foods to be sampled every day. During the manual sample retention process, problems such as mixed sample retention, insufficient sample weight, and incorrect recording of the names of sampled foods are likely to occur due to operation errors and fatigue. These problems not only affect the effectiveness of food safety supervision but also may pose potential health risks to consumers. Although existing sample scales and sample retention machines can achieve automatic weighing and the function of printing labels based on input, since multiple links of these devices require manual intervention, their efficiency is low. The oil gas and water vapor emitted by hot dishes during sample retention not only affect the automatic induction of the equipment but also greatly reduce the hygienic safety of the device. In addition, cold dishes, hot dishes, soups, and staple foods in terms of dish types often exhibit different temperature characteristics and texture characteristics, which also hinder the automatic implementation of the sample retention device.

[0004] In view of the above problems, there is a need to develop an intelligent food sample retention and recording device and method for large-scale dish sample retention, which can realize the rapid and intelligent identification of dishes and ensure the safe, stable, and hygienic operation of the equipment, while meeting the requirements of food safety supervision while improving efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method that can adapt to and identify different types of ingredients, input information, and output labels for the problems in the process of large-scale dish sample retention in group meal enterprises, such as the oil gas and water vapor emitted by hot dishes affecting the automatic induction and hygienic safety of the equipment, and the difficulty in automatically identifying cold dishes, hot dishes, soups, and staple foods. It can identify, record, and output labels for a large number of dishes in a short time.

[0006] The technical solution adopted by an intelligent food sample retention and recording device of the present invention is as follows: The main functional modules of the device include: a housing, a weighing module, a control and processor module, an image acquisition module, a dish perception module, and a cleaning and disinfection module.

[0007] The shell as a structural component mainly functions to install other modules. The shell includes an outer shell and an inner shell. Between the outer shell and the inner shell are the pipes and circuit channels of each module. The outer shell is the installation basis of all components of the device. The inner shell is used to provide a sanitary inner cavity and prevent liquid from contacting the circuit. The outer shell is a cubic shape with an opening on one side. The open side of the outer shell is a rectangular opening for putting in and taking out dishes. A vent is provided on the opposite side of the rectangular opening for lateral ventilation and cooling inside the inner shell. A heat dissipation hole is provided below the rectangular opening. The inner shell, which is also a cubic structure, is arranged inside the outer shell and is fixedly connected to the outer shell through the side and top of the inner shell, and the lower edge of the inner shell is suspended in the air.

[0008] The base plate of the weighing module is fixed to the bottom of the outer shell. In order to meet the strain requirements of the weight sensor, the weight sensor is cantilevered on the base plate. A tray is cantilevered above the weight sensor. The shape of the tray is that the upper surface is provided with a groove with both sides facing downward in a dovetail shape. The width of the groove on the upper surface of the tray matches the sampling box. A vibration motor is provided at one end of the tray. A semiconductor refrigeration plate is tightly attached to the lower surface of the tray. When the semiconductor refrigeration plate is powered on, the upper end is the cold end and the lower end is the hot end. The heat generated at the hot end of the semiconductor refrigeration plate is dissipated into the air through its heat dissipation fins and then discharged through the heat dissipation holes.

[0009] The control and processor module includes a controller for controlling each working part, a processor for recognizing voice and images, an input device and an output device, wherein the input device includes an image acquisition module, a touch screen, and a microphone; the output device includes a touch screen, various execution modules, and a label printer; the input signal of the controller includes a dish sensing unit signal, a weighing module signal, a processor recognition result signal, and a touch screen input signal; the output signal of the controller includes a signal for controlling the oil and gas removal module, a display signal of the touch screen, and a signal for controlling the cleaning and disinfection module.

[0010] The dish sensing module is composed of an infrared temperature sensor arranged on the top of the inner shell, a semiconductor cooling plate installed opposite to it, and an oil-removing fan installed on the vent. The working states sensed by the dish sensing module include: (1) standby state. After the device is turned on, the semiconductor cooling plate cools the tray close to its cold end. When there is no sampling box on the tray, the infrared temperature sensor detects a temperature lower than the inner shell environment and determines that there is no dish; (2) It is determined to be a cold dish. When a sampling box with a dish is placed, the infrared temperature sensor senses a temperature lower than 25°C; (3) It is determined to be a hot dish. When the infrared temperature sensor senses a temperature higher than 30°C-60°C, it is determined to be a hot dish and sends a signal that can be identified to the control and processor module; (4) It is determined to be a hot dish and oil, gas and steam are removed. When the infrared temperature sensor senses a temperature higher than 60°C, it is determined to be a hot dish and sends a signal to the control and processor module to start the oil-removing fan.

[0011] The cleaning and disinfection module consists of a liquid tank, a water pump, a spray pipe, a nozzle, and a liquid return tank; the liquid tank is arranged on the bottom plate between the outer shell and the inner shell, one end of the water pump is connected to the liquid tank, and the other end is connected to the nozzle through the top of the inner shell after passing through the spray pipe, and the nozzle is arranged at the top of the inner shell; when cleaning and disinfection are required, the nozzle sprays disinfectant to spray and disinfect the inside of the inner shell, and a part of the dripped disinfectant can flow into the drawer-shaped liquid return tank along the dovetails on both sides of the groove on the upper surface of the tray, and the disinfectant on the inner shell wall can flow into the liquid return tank along the side wall, and the drawer-shaped liquid return tank can be pulled out from the rear of the device.

[0012] The starting conditions and working modes of the vibration motor are divided into two categories. The first category is to start after receiving the signal that the dish is placed and vibrate at a fixed frequency to vibrate the dish to make it more dense and make the upper surface as flat as possible to form a good focal plane, reducing the depth of field of the image acquisition module; the second starting condition is that when the image recognition module initially recognizes that the dish has a large reflective surface, it is determined as a soup or porridge dish, and the vibration motor vibrates at different frequencies, so that the soups and porridges with different viscosities form different ripples to provide a basis for image recognition.

[0013] The image acquisition module is arranged at the top of the inner shell and the acquisition lens is facing the sampling box. The image acquisition module includes a first lens and a second lens. Ordinary glass is arranged in front of the first lens, and a polarizer is arranged in front of the second lens. A supplementary light is arranged at the top of the inner shell; the normal dish image acquisition is completed by the first lens. When the first lens acquires a large area of reflective surface, it can be determined that the dish is a soup or porridge dish. At this time, the vibration motor is started to vibrate at different frequencies, so that the soups and porridges with different viscosities form different ripples and activate the second lens to jointly acquire the dish image with the first lens.

[0014] An intelligent food sample retention and recording device and method. The modules that control the operation of the device include the following wiring relationships and functions: (1) The control and processor module includes a signal input unit, a signal output unit, a logic control unit, and a video and audio processing unit. The touch screen serves as both an input device and an output device and is connected to the signal input and output units of the control and processor module for input and display of dish information. The signal input unit of the control and processor module is also connected to a microphone, an image acquisition module, an infrared temperature sensor, and a weighing module. The signal output unit of the control and processor module is also connected to a thermoelectric cooler, a water pump, an oil and gas removal fan, a vibration motor, a label printer, a fill light, and a second lens. (2) The microphone transmits voice to the video and audio processing unit through the signal input unit for recognition. The image recognition module transmits images to the video and audio processing unit through the signal input unit for recognition. The infrared temperature sensor transmits different temperature values to the logic control unit through the signal input unit for logical judgment. The weighing module transmits the weight of the dish to the control and processor module by connecting to the signal input unit. (3) The logic control unit connects to the switches of the thermoelectric cooler, the water pump, the oil and gas removal fan, the vibration motor, and the fill light through the signal output unit. The video and audio processing unit sends an activation signal to the second lens and the label printer through the signal output unit.

[0015] The working process of the device includes the following steps: (1) After the device is powered on, the control and processor module starts. The control and processor module can receive signal inputs from each module and sensor and can control the start and stop of each working component. The control and processor module controls the thermoelectric cooler to start working. The thermoelectric cooler cools the tray close to its cold end so that the tray temperature is lower than 4°C. The control and processor module activates the infrared temperature sensor to start collecting temperature. When the temperature collected by the infrared temperature sensor is detected to be much lower than the temperature of the inner shell environment, it can be determined that there is no dish, and the system is in a standby state. (2) When a sampling box containing a dish is placed, the dish blocks the low temperature of the tray, and the infrared temperature sensor senses a temperature signal greater than 4°C, and it is determined that the dish has been placed. (3) The control and processor module controls the vibration motor to compact the dish in the sampling box placed on the tray. This process can improve the phenomenon of unevenness at the top of the dish presentation, improve the clarity of image acquisition, and can also improve the phenomenon of false height caused by the lack of density inside the dish.

[0016] (4)After it is determined that the dish has been placed and vibration-compacted, and the temperature is lower than 25°C, it is determined as a cold dish and a recognizable signal is sent to the control and processor module; since hot dishes with too high a temperature will emit oil fumes and water vapor, and these substances will contaminate the image acquisition module, resulting in recognition failure. Therefore, when the infrared temperature sensor senses a temperature higher than 60°C, it is determined as a hot dish and a signal is sent to the control to turn on the oil fume removal fan. The oil fume removal fan blows horizontally, so that the oil fumes and water vapor emitted by the dish cannot rise vertically.

[0017] (5)After the vibration motor stops working, the weighing module weighs the dish, the fill light is turned on, the first lens of the image acquisition module acquires an image of the dish and transmits it to the control and processor module for recognition. After successful recognition, a record containing the dish sampling time, sampling name, and dish weight is formed and relevant labels are printed through the label printer. (6)When the dish is a soup or porridge with strong light reflection characteristics, the first lens acquires an image containing a large number of light spots and transmits it to the control and processor module. The control and processor module starts the vibration motor to vibrate at different frequencies and activates the second lens to jointly acquire the dish image through the polarizer and the first lens. After successful recognition, a record containing the dish sampling time, sampling name, and dish weight is formed and relevant labels are printed through the label printer. (7)When the previous steps cannot correctly identify the dish, the sampler selects voice input recognition through the touch screen. At this time, the microphone is activated, and the sampler can identify the dish by voice input and be recognized by the control and processor module. A record containing the dish sampling time, sampling name, and dish weight is formed and relevant labels are printed through the label printer. (8)When the sampler selects the end of sampling on the touch screen, the control and processor module starts the water pump after a certain delay. The disinfectant is sprayed out from the nozzle at the top of the inner shell through the spray pipe to spray and disinfect the inside of the inner shell. The remaining waste liquid flows into the liquid return tank. The liquid return tank containing the waste liquid can be pulled out from the back of the device for cleaning. After the water pump stops for a certain time, the control and processor module starts the oil fume removal fan to ventilate and dry the inside of the device. After the above work is completed, the device can be shut down.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. The technical solution of the present invention, through the design of functional modules, well realizes the efficient acquisition of dish information in dishes with multiple soups and in an oil and gas steam environment. Due to the characteristic of multiple soups in the dishes, splashing is inevitable during the sampling process. In addition, the regulatory requirements for sample retention must sample the dishes in time after they are taken out of the pot, which results in the characteristics of some dishes emitting oil and gas and steam. These problems will affect the accuracy of information collection by various sensors. In addition, the material requirements for the sampling box in the food field also limit the use of magnetic induction sensors. The technical solution of the present invention adopts a dish sensing module composed of an infrared temperature sensor arranged at the top of the inner shell, a semiconductor refrigeration sheet installed opposite to it, and an oil and gas removal fan installed on the ventilation port; this non-contact temperature gradient and temperature comparison method of induction type not only solves the problem that it is difficult for the photoelectric induction and magnetic induction methods to work properly, but also according to the induction of the temperature gradient, blowing air horizontally to cool the oil and gas and steam in a targeted manner also avoids the pollution of these oil and gas and steam to the image acquisition module.

[0019] 2. The structure and working method of the technical solution of the present invention that combines a vibration motor with an image acquisition module can achieve the following beneficial effects: (1) After receiving the signal that the dish is placed, it starts and vibrates at a fixed frequency, vibrating the dish to make it more dense and making the upper surface as flat as possible to form a good focal plane, reducing the depth of field of the image acquisition module and increasing the clarity of image acquisition; (2) Due to the shape of some dishes, when dishes of the same weight are placed in the sampling box, there is a phenomenon of being falsely high, which will cause the focal length of the lens not to be on the upper surface of the dish. By vibrating and compacting, the false height is reduced, so that the focal lengths of each dish are basically the same; (3) When the image recognition module initially recognizes that the dish has a large reflective surface, it is determined as a soup or porridge dish, and the vibration motor vibrates at different frequencies to make the soups or porridges with different viscosities form different ripples. This ripple feature, combined with the image acquisition module, can enable the image acquisition module to obtain more feature data, thereby improving the recognition accuracy.

[0020] 3. The technical solution of the present invention adopts that the normal dish image acquisition is completed by the first lens. When the first lens collects a large area of reflective surface, the second lens provided with a polarizing filter intervenes for image acquisition. This way of filtering the reflected light of the dish through polarized light can improve the accuracy of dish recognition. Description of the Drawings

[0021] Figure 1 is the overall view of the device; Figure 2 is the rear side view inside the housing; Figure 3 is the front view inside the housing; Figure 4 is the schematic diagram of the components under the tray; Figure 5 is the schematic diagram of the image acquisition module; Figure 6 It is the working flowchart of the device. Specific implementation mode

[0022] As Figure 1-4 shown, a food sample retention and recording device of the present invention adopts the following technical solutions: The outer shell 01 of the device is the installation basis for all components of the device. Above the outer shell 01, a control and processor 02, a microphone 05, a touch screen 04, and a label printer 03 are installed. The inner shell 06 is used to provide a hygienic inner cavity and block the liquid from contacting the circuit. The outer shell 01 has a cubic shape with an opening on one side. The opening side of the outer shell 01 is a rectangular opening for putting in and taking out dishes. On the opposite side of the rectangular opening, there is a ventilation opening 020 for transverse ventilation and cooling inside the inner shell 06. Below the rectangular opening, there are heat dissipation holes 07. The inner shell 06, which is also of a cubic structure, is arranged inside the outer shell 01 and is fixedly connected to the outer shell 01 through the sides and the top. The lower edges of both sides of the inner shell 06 are suspended and are exactly above the liquid return groove 026. After the cleaning and disinfection operation, the residual disinfectant on the wall surface of the inner shell 06 can fall into the liquid return groove 026. Between the outer shell 01 and the inner shell 06 is the pipeline and circuit channel for each module.

[0023] In the above solution, the material of the inner shell 06 is preferably 304 stainless steel that meets food safety requirements, and a hydrophobic coating is sprayed on the surface. This combination can enable the inner shell to be resistant to disinfectant corrosion while the disinfectant on the wall surface of the inner shell 06 can quickly flow down and fall into the liquid return groove 026.

[0024] In the above solution, the liquid tank 022, the water pump 023, the spray pipeline 024, the spray head 027, and the liquid return groove 026 constitute the cleaning and disinfection module. The liquid tank 022 is arranged on the bottom plate between the outer shell 01 and the inner shell 06. Disinfectant is filled in the liquid tank 022. One end of the water pump 023 is connected to the liquid tank 022, and the other end is connected to the spray head 027 through the spray pipeline 024 after passing through the top of the inner shell 06. The spray head 027 is arranged at the top of the inner shell 06. When cleaning and disinfection are required, the spray head 027 sprays disinfectant to spray and disinfect the inside of the inner shell 06. Part of the sprayed disinfectant can flow into the drawer-shaped liquid return groove 026 along the dovetails on both sides of the groove 034 on the upper surface of the tray 033. The disinfectant on the wall surface of the inner shell 06 can flow into the liquid return groove 026 along the side wall. The drawer-shaped liquid return groove 026 can be pulled out from the rear of the device.

[0025] The weight sensor 032 is cantilever-mounted on the bottom plate 031. The bottom plate 031 is fixed to the bottom of the outer shell 01. A tray 033 is cantilever-mounted above the weight sensor 032. The tray 033 has a shape with a groove 034 on the upper surface and is in the shape of a dovetail tapering downwards on both sides. The width of the groove 034 on the upper surface of the tray 033 matches the sampling box 030. One end of the tray 033 is provided with a vibration motor 036. At least two semiconductor refrigeration chips 035 are closely attached to the lower surface of the tray 033. After the semiconductor refrigeration chips 035 are energized, the upper part is the cold end and the lower part is the hot end. The heat generated at the hot end of the semiconductor refrigeration chips 035 is dissipated into the air through its heat dissipation fins and then discharged through the heat dissipation holes 07.

[0026] The infrared temperature sensor 028 at the top of the inner shell 06, the semiconductor refrigeration chip 035 mounted opposite to it, and the de-oiling fan 021 mounted on the ventilation opening 020 form a dish sensing module. The working states sensed by the dish sensing module include: (1) standby state. After the device is powered on, the semiconductor refrigeration chip 035 cools the tray 033 closely attached to its cold end. When no sampling box 030 is placed on the tray 033 and the infrared temperature sensor 028 detects a temperature lower than the environment temperature of the inner shell 06, it can be determined that there is no dish; (2) determined as cold dish. When a sampling box 030 with a dish is placed, the infrared temperature sensor 028 senses a temperature lower than 25°C; (3) determined as hot dish. When the infrared temperature sensor 028 senses a temperature higher than 30°C - 60°C, it is determined as a hot dish and a signal that can be recognized is sent to the control and processor module; (4) determined as hot dish and removing oil gas and steam. When the infrared temperature sensor 028 senses a temperature higher than 60°C, it is determined as a hot dish and a signal to turn on the de-oiling fan 021 is sent to the control.

[0027] As Figure 5 shown, the image acquisition module includes a first lens 043 and a second lens 044. A common glass 041 is arranged in front of the first lens 043, and a polarizer 042 is arranged in front of the second lens 044. A fill light 045 is arranged at the top of the inner shell 06; the image acquisition module is arranged at the top of the inner shell 06 and the acquisition lens is facing the sampling box 030. The normal dish image acquisition is completed by the first lens 043. When the first lens 043 acquires a large area of reflective surface, it can be determined that the dish is a soup or porridge type. At this time, the vibration motor 036 is started to vibrate at different frequencies, so that the soups or porridges with different viscosities form different ripples and activate the second lens 044 to jointly acquire the dish image with the first lens 043.

[0028] An intelligent food sample retention and recording device and method. Each module that controls the device's operation includes the following wiring relationships and functions: (1) The control and processor module includes a signal input unit, a signal output unit, a logic control unit, and a video and audio processing unit. The touch screen 04 serves as both an input device and an output device, connecting to the signal input and output units of the control and processor module for input and display of dish information. The signal input unit of the control and processor module is also connected to the microphone 05, the image acquisition module, the infrared temperature sensor 028, and the weighing module. The signal output unit of the control and processor module is also connected to the thermoelectric cooler 035, the water pump 023, the oil and gas removal fan 021, the vibration motor 036, the label printer 03, the fill light 045, and the second lens 044. (2) The microphone 05 transmits voice to the video and audio processing unit through the signal input unit for recognition. The image recognition module transmits images to the video and audio processing unit through the signal input unit for recognition. The infrared temperature sensor 028 transmits different temperature values to the logic control unit through the signal input unit for logical judgment. The weighing module transmits the weight of the dish to the control and processor module by connecting to the signal input unit. (3) The logic control unit connects to the switches of the thermoelectric cooler 035, the water pump 023, the oil and gas removal fan 021, the vibration motor 036, and the fill light 045 through the signal output unit. (4) The video and audio processing unit sends activation signals to the second lens 044 and the label printer 03 through the signal output unit.

[0029] As Figure 6 shown, an intelligent food sample retention and recording method for an intelligent food sample retention and recording device further includes the following specific processes: (1) After the device is powered on, the control and processor module starts. The control and processor module can receive signal inputs from each module and sensor and can control the start and stop of each working component. The control and processor module controls the thermoelectric cooler 035 to start working. The thermoelectric cooler 035 cools the tray 033 in contact with its cold end so that the temperature of the tray 033 is lower than 4°C. The control and processor module activates the infrared temperature sensor 028 to start collecting temperature. When the temperature collected by the infrared temperature sensor 028 is detected to be much lower than the temperature of the inner shell 06 environment, it can be determined that there is no dish, and the system is in the standby state.

[0030] (2) When the sampling box 030 containing the dish is placed in, the dish blocks the low temperature of the tray 033. The infrared temperature sensor 028 senses a temperature signal greater than 4°C and determines that the dish has been placed.

[0031] (3)The control and processor module controls the vibration motor 036 to vibrate at a fixed frequency to compact the dishes placed in the sampling box 030 on the tray 033. This process can improve the unevenness of the top surface of the dishes, make them more dense and make the upper surface as flat as possible to form a good focal plane, reduce the depth of field of the image acquisition module, and can also improve the phenomenon of false height caused by the non-dense interior of the dishes.

[0032] (4)After it is determined that the dish has been placed and vibration-compacted, and when the temperature is lower than 25°C, it is determined as a cold dish and a signal for recognition is sent to the control and processor module; since hot dishes with too high a temperature will emit oil gas and water vapor, and these substances will contaminate the image acquisition module, resulting in recognition failure. Therefore, when the infrared temperature sensor 028 senses a temperature higher than 60°C, it is determined as a hot dish and a signal to turn on the oil gas removal fan 021 is sent to the control. The oil gas removal fan 021 blows horizontally, so that the oil gas and water vapor emitted by the dish cannot rise vertically.

[0033] (5)After the vibration motor 036 stops working, the weighing module weighs the dish, the fill light 045 is turned on, the first lens 043 of the image acquisition module acquires an image of the dish and transmits it to the control and processor module for recognition. After successful recognition, a record containing the dish sampling time, sampling name, and dish weight is formed and a relevant label is printed through the label printer 03.

[0034] (6)When the dish is a soup or porridge with strong light reflection characteristics, the first lens 043 acquires an image containing a large number of light spots and transmits it to the control and processor module. The control and processor module starts the vibration motor 036 to vibrate at different frequencies and activates the second lens 044 to jointly acquire the dish image through the polarizer 042 and the first lens 043. After successful recognition, a record containing the dish sampling time, sampling name, and dish weight is formed and a relevant label is printed through the label printer 03.

[0035] (7)When the previous steps cannot correctly identify the dish, the sampler selects voice input recognition through the touch screen 04. At this time, the microphone 05 is activated, and the sampler can identify the dish by voice input and recognition by the control and processor module. A record containing the dish sampling time, sampling name, and dish weight is formed and a relevant label is printed through the label printer 03.

[0036] After the sampler selects the end of sampling on the touch screen 04, the control and processor module starts the water pump 023 after a certain delay. The disinfectant is sprayed out from the nozzle 027 at the top of the inner shell 06 through the spray pipe 024 to spray and disinfect the inside of the inner shell 06. The residual waste liquid flows into the liquid return tank 026. The liquid return tank 026 filled with waste liquid can be pulled out from the rear of the device for cleaning. After the water pump 023 stops for a certain time, the control and processor module starts the de-oiling and gas fan 021 to ventilate and dry the inside of the device. After the above work is completed, the device can be shut down.

Claims

1. A food intelligent sample retention and recording device, characterized in that: include: Shell, weighing module, control and processor module, image acquisition module, food sensing module, cleaning and disinfection module; the shell includes an outer shell and an inner shell, the outer shell is a cubic shape with an opening on one side, the open side of the outer shell is a rectangular opening for putting in and taking out food, a ventilation opening is arranged on the opposite side of the rectangular opening, and a heat dissipation hole is arranged below the rectangular opening, the inner shell is arranged inside the outer shell and is fixedly connected to the outer shell through the side and top of the inner shell, and the outer shell and the inner shell are between the pipelines and circuit channels of each module; the bottom plate of the weighing module is fixed to the bottom of the outer shell, a weight sensor is installed on the bottom plate, and the top of the weight sensor A tray is installed, and the shape of the tray is that the upper surface is provided with grooves and the two sides are dovetail-shaped downward, the width of the groove on the upper surface of the tray matches the sampling box, one end of the tray is provided with a vibration motor, and the lower surface of the tray is closely attached to no less than two semiconductor cooling sheets, and the upper part of the semiconductor cooling sheet is the cold end and the lower part is the hot end after the semiconductor cooling sheet is powered on; the dish sensing module includes an infrared temperature sensor arranged on the top of the inner shell, a semiconductor cooling sheet, and an oil-removing gas fan installed on the vent; the dish sensing module uses an infrared temperature sensor to detect the temperature of the dish and whether the dish blocks the low-temperature semiconductor cooling sheet to sense the dish; The image acquisition module is arranged on the top of the inner shell and the acquisition lens faces the sampling box; The image acquisition module includes a first lens and a second lens. Ordinary glass is arranged in front of the first lens, a polarizing film is arranged in front of the second lens, and a fill light is arranged on the top of the inner shell. Normal dish image acquisition is completed by the first lens. When the first lens captures a large area of ​​reflective surface, it can be determined that the dish is soup or porridge. At this time, the vibration motor is started to vibrate at different frequencies, so that soups and porridges with different viscosities form different ripples and activate the second lens to jointly capture the dish image with the first lens.

2. The intelligent food sample retention and recording device according to claim 1, characterized in that: The control and processor module includes a controller for controlling each working part, a processor for recognizing voice and images, an input device and an output device, wherein the input device includes an image acquisition module, a touch screen, and an audio acquisition module; the output device includes a touch screen, various execution modules, and a label printer; the input signal of the controller includes a dish sensing unit signal, a weighing module signal, a processor recognition result signal, and a touch screen input signal; the output signal of the controller includes a signal for controlling the oil and gas removal module, a display signal of the touch screen, and a signal for controlling the cleaning and disinfection module.

3. The intelligent food sample retention and recording device according to claim 1, characterized in that: The working states sensed by the dish sensing module include: (1) standby state. After the device is turned on, the semiconductor refrigeration plate cools the tray close to its cold end, and the heat generated by the hot end of the semiconductor refrigeration plate is discharged through the heat dissipation holes. When there is no sampling box on the tray, the infrared temperature sensor detects a temperature lower than the inner shell environment and determines that there is no dish; (2) It is determined to be a cold dish. When a sampling box with a dish is placed in, the infrared temperature sensor senses a temperature lower than 25°C; (3) It is determined to be a hot dish. When the infrared temperature sensor senses a temperature higher than 30°C-60°C, it is determined to be a hot dish and sends a signal that can be identified to the control and processor module; (4) It is determined to be a hot dish and oil, gas and steam are removed. When the infrared temperature sensor senses a temperature higher than 60°C, it is determined to be a hot dish and sends a signal to the control and processor module to start the oil and gas removal fan.

4. The intelligent food sample retention and recording device according to claim 1, characterized in that: The cleaning and disinfection module consists of a liquid tank, a water pump, a spray pipe, a nozzle, and a liquid return tank; the liquid tank is arranged on the bottom plate between the outer shell and the inner shell, one end of the water pump is connected to the liquid tank and the other end is connected to the nozzle after passing through the top of the inner shell through the spray pipe, and the nozzle is arranged on the top of the inner shell; when cleaning and disinfection is required, the nozzle sprays disinfectant to spray and disinfect the inside of the inner shell, and a part of the disinfectant can flow into the drawer-shaped liquid return tank along the dovetails on both sides of the groove on the upper surface of the tray, and the disinfectant on the wall of the inner shell can flow into the liquid return tank along the side wall, and the drawer-shaped liquid return tank can be pulled out from the rear of the device.

5. The intelligent food sample retention and recording device according to claim 1, characterized in that: The conditions and working modes for starting the vibration motor are divided into two categories. The first category is that it starts after receiving the signal that the dish is placed and vibrates at a fixed frequency. The dish is vibrated to make it denser and the upper surface as flat as possible to form a good focal plane, reducing the depth of field of the image acquisition module. The second type of starting condition is that when the image recognition module preliminarily identifies that the dish has a large reflective surface, it is judged to be a soup or porridge dish. The vibration motor vibrates at different frequencies, causing soups and porridges with different viscosities to form different ripples, thereby providing more feature information for image recognition.

6. The intelligent food sample retention and recording device according to claim 1, characterized in that: The modules of the control device include the following wiring relationships and functions: the control and processor module includes a signal input unit, a signal output unit, a logic control unit, and an audio and video processing unit; the touch screen is connected to the signal input and output unit of the control and processor module as both an input device and an output device, and is used for inputting and displaying food information; the logic control unit is connected to the following components through the signal output unit: semiconductor cooling plate, water pump, de-oiling fan, vibration motor, and fill light switch; the audio and video processing unit sends an activation signal to the second lens and label printer through the signal output unit; the microphone transmits voice to the audio and video processing unit through the signal input unit and recognizes it, the image recognition module transmits images to the audio and video processing unit through the signal input unit and recognizes them, the infrared temperature sensor transmits different temperature values ​​to the logic control unit through the signal input unit for logic judgment, and the weighing module transmits the food weight to the control and processor module through the signal input unit.

7. The method for recording food samples by the intelligent food sample recording device according to claim 1, comprising the following steps: (1) After the equipment is turned on, the control and processor module starts up. The control and processor module can receive signal inputs from various modules and sensors and can control the start and stop of various working parts. The control and processor module controls the semiconductor refrigeration chip to start working. The semiconductor refrigeration chip cools the tray close to its cold end so that the tray temperature is lower than 4°C. The control and processor module activates the infrared temperature sensor to start collecting temperature. When the temperature collected by the infrared temperature sensor is detected to be far lower than the temperature of the inner shell environment, it can be determined that there is no food and the system is in standby mode. (2) When the sampling box containing the dishes is placed in, the dishes block the low temperature of the tray, and the infrared temperature sensor senses a temperature signal greater than 4°C, and determines that the dishes have been placed in; (3) The control and processor module controls the vibration motor to vibrate the dishes in the sampling box placed on the tray. This process can improve the uneven top of the dishes and improve the clarity of image acquisition. This process can also improve the false height caused by the looseness of the inside of the dishes. (4) When it is determined that the dish has been placed in and vibrated tightly, and the temperature is below 25°C, it is determined to be a cold dish and a signal for identification is sent to the control and processor module; because hot dishes with too high a temperature will emit oil gas and water vapor, these substances will contaminate the image acquisition module and cause recognition failure. Therefore, when the infrared temperature sensor senses a temperature higher than 60°C, it is determined to be a hot dish and a signal is sent to the control to turn on the oil and gas removal fan. The oil and gas removal fan blows horizontally, so that the oil and gas emitted by the dish cannot rise vertically; (5) After the vibration motor stops working, the weighing module weighs the weight of the dish, the fill light is turned on, and the first lens of the image acquisition module captures the image of the dish and transmits it to the control and processor module for recognition. After successful recognition, a record containing the sampling time, sampling name, and dish weight of the dish is formed and a relevant label is printed out through the label printer; (6) When the dish has a strong reflective property such as soup or porridge, the first lens captures an image containing a large number of light spots and transmits it to the control and processor module. The control and processor module starts the vibration motor to vibrate at different frequencies and activates the second lens to collect the dish image through the polarizing film together with the first lens. After successful recognition, a record containing the dish sampling time, sampling name, and dish weight is formed and a relevant label is printed out through a label printer; (7) When the previous steps cannot correctly identify the dish, the sampler selects voice input recognition through the touch screen. At this time, the microphone is activated and the sampler can identify the dish through voice input and recognition by the control and processor module, forming a record containing the dish sampling time, sampling name, and dish weight, and printing out a relevant label through the label printer; (8) When the sampler selects the end of sampling on the touch screen, the control and processor module starts the water pump after a certain delay, and the disinfectant is sprayed out from the nozzle on the top of the inner shell through the spray pipe to spray and disinfect the inside of the inner shell. The residual waste liquid flows into the return liquid tank. The return liquid tank containing the waste liquid can be drawn out from the back of the device for cleaning. After the water pump stops for a certain period of time, the control and processor module starts the de-oiling fan to ventilate and dry the inside of the device. After the above work is completed, the device can be shut down.

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