CN112629148A

CN112629148A - Refrigerator food storage time monitoring system

Info

Publication number: CN112629148A
Application number: CN202011587554.8A
Authority: CN
Inventors: 亢红波; 李延伟; 杨春杰; 王文庆; 李朕; 李红; 刘颖; 刘延; 吴益凡; 焦炳淳; 李粉娜; 傅玉清; 牛荣; 张士豪; 朱梁
Original assignee: Xian University of Posts and Telecommunications
Current assignee: Xian University of Posts and Telecommunications
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-04-09

Abstract

A refrigerator food storage duration monitoring system is divided into a host machine and a slave machine. When articles are stored and taken, the database articles are increased or decreased through voice, and timing is started after the articles are placed in a refrigerator; when a person is detected, automatically displaying the type and the quantity of the articles and the remaining storage time, and carrying out voice reminding on the fresh critical time node according to the self-built database so that the user can eat the articles within the optimal time limit; meanwhile, online menu recommendation can be performed based on existing food. The slave computer is connected with the host computer through Bluetooth, interacts with a user through voice, can report storage content, air quality and weather conditions of the refrigerator, can finish service content such as message leaving and reminding, and can be set for timing or human body infrared triggering. The device is an additional piece and is suitable for all refrigerators, and the provided service can enable the life to be more convenient, more organized and healthier. The problem that food is deteriorated or overdue due to overlong storage time in the refrigerator is solved, and waste is avoided.

Description

Refrigerator food storage time monitoring system

Technical Field

The invention relates to the field of food storage monitoring, in particular to a refrigerator food storage time monitoring device.

Background

Along with the improvement of living standard, the food types of people are more and more abundant, the quantity of purchased meat, fruits, vegetables and the like is more and more, and the refrigerator becomes a necessity in daily life. The refrigerator has the tendency of large-scale, the stored articles are numerous and diverse, food is easy to forget to cause overdue deterioration, the total amount of waste caused by the overdue deterioration is huge, and the environment is indirectly polluted. With the improvement of the quality of life, how to reasonably match the diet becomes a problem which needs to be considered by people.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a refrigerator food storage time monitoring device which can monitor and intelligently remind food in a refrigerator and can also control a refrigerator monitoring system through voice. The intelligent food monitoring system has the characteristics of complete functions, good food monitoring effect, high intelligent integration level and the like.

In order to achieve the purpose, the invention adopts the technical scheme that:

a refrigerator food storage duration monitoring system comprises a host and a slave, wherein the host and the slave are communicated through Bluetooth:

the host comprises a host controller circuit, a host power management circuit, a host voice recognition circuit, a host wireless communication circuit, a host infrared sensor circuit and a liquid crystal display circuit; the host controller circuit is connected with the host voice recognition circuit, the host wireless communication circuit, the host infrared sensor circuit and the signal control end of the liquid crystal display circuit, and the power management circuit is connected with the host controller circuit, the host voice recognition circuit, the host wireless communication circuit, the host infrared sensor circuit and the power supply end of the liquid crystal display circuit. The host power management circuit is connected with the power supply end of the host controller circuit independently.

The slave machine comprises a slave machine controller circuit, a slave machine power management circuit, a slave machine voice recognition circuit, a slave machine wireless communication circuit and a slave machine infrared sensor circuit; the slave controller circuit is respectively connected with signal control ends of the slave voice recognition circuit, the slave wireless communication circuit and the slave infrared sensor circuit, and the slave power management circuit is connected with a power supply end of the slave controller circuit.

The host controller circuit is used for controlling the working state of each module in the refrigerator food storage duration monitoring system;

the main machine can be arranged at the outer side of the refrigerator door;

the host voice recognition circuit is used for receiving voice information and transmitting the voice information to the host controller circuit after processing;

the host wireless communication unit is used for carrying out communication among the host, the slave and the server;

the liquid crystal display screen is connected with the main controller of the host computer to display the types, the quantity and the remaining storage time of the food in the refrigerator.

The host power management circuit is used for supplying power to the host controller circuit and ensuring the normal operation of the host controller.

The host infrared sensor circuit is used for detecting human body infrared triggering.

The slave machine can be arranged in a visible place such as a living room and the like, is used for reminding a user of eating food exceeding the storage time in time, recommending a menu to the user according to the requirement, broadcasting the food, the weather condition and the air quality stored in the refrigerator, finishing the service contents such as message leaving, reminding and the like, and setting timing or human body infrared triggering;

the slave controller circuit is used for controlling the operation state of each module circuit connected with the slave.

The slave power management circuit is used for supplying power to the slave controller circuit and guaranteeing the normal operation of the slave controller.

The host computer slave computer voice recognition circuit is used for receiving voice information of a user and transmitting the voice information to the slave computer controller circuit after processing;

the host-slave wireless communication circuit is used for establishing communication service between the host and the slave.

The slave infrared sensor circuit is used for detecting human body infrared trigger.

The host is connected to the open source voice recognition library through the wireless communication unit, and can be forwarded to the open source voice library to finish recognition under the condition that a local voice library cannot be recognized;

the device is connected to a network through a wireless communication unit to acquire weather information, recommends a proper menu to a user according to food in the refrigerator and broadcasts the food, weather conditions and air quality stored in the refrigerator according to requirements.

The main controller of the device is STM32F407ZET 6.

The host controller circuit is provided with a locally established food storage duration database, after food is stored in the refrigerator, the optimal number of days for food storage is calculated according to the storage mode of the food, and a user is reminded to eat the food in time through voice when the time is up.

Host computer controller circuit, host computer power management circuit, host computer speech recognition circuit, host computer wireless communication circuit, host computer infrared sensor circuit, liquid crystal display circuit that the host computer contain, wherein:

the host controller circuit comprises an STM32F407ZET6 singlechip, a crystal oscillator Y1, a crystal oscillator Y2, a capacitor C9, a capacitor C11, a resistor R16, a capacitor C13, a capacitor C14, a capacitor C19, a capacitor C20, a resistor R18, a capacitor C23, a capacitor C24, a resistor R19, a capacitor C48, a diode D2, a diode D3, a battery BAT1, a capacitor C33, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a resistor R100 and a capacitor C49. Wherein Y1 is 32.768kHz, Y2 is 8MHz, C9 is 10pF, C11 is 10pF, R16 is 1M, C13 is 22, C14 is 22, C19 is 225, C20 is 225, R18 is 10, C23 is 10uF, C24 is 104, R19 is 0, C48 is 104, D2 specification is 1N4148, D3 specification is 1N4148, C33 is 104, C34 is 104, C35 is 104, C36 is 104, C37 is 104, C38 is 104, C39 is 104, C40 is 104, C41 is 104, C42 is 104, C43 is 104, C44 is 104, R100 is 1k, and C49 is 225.

The host power management circuit comprises a resistor R38, a light emitting diode DS4, a U5 voltage stabilization chip AMS1117-3.3, a capacitor C54, a capacitor C55, a capacitor C56, a U7 voltage stabilization chip AMS1117-3.3, a capacitor C63, a capacitor C62, a capacitor C64, a D6 diode and a D7 diode. Wherein R38 is 510R, C54 is 104, C55 is 10uF, C56 is 104, C63 is 104, C62 is 10uF, and C64 is 104. Model number D6 is SMBJ5.0A, model number D7 is SMBJ5.0A.

The host voice recognition circuit is composed of a WM 15 chip, a resistor R15, a capacitor C10, a capacitor C12, a capacitor C15, a capacitor C18, a resistor R17, a capacitor C21, a capacitor C22, a resistor R23, a resistor R25, a capacitor C45, a capacitor C46, a resistor R24, a resistor R21, a capacitor C47, a resistor R22, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a resistor R32, a resistor R33, a resistor R106, a capacitor C52, a capacitor C53 and a microphone. Wherein R15 is 0, C10 is 104, C12 is 10uF, C15 is 10uF, C18 is 104, R17 is 10R, C21 is 104, C22 is 10uF, R23 is 10K, R25 is 0, C45 is 10uF, C46 is 10uF, R24 is 47K, R21 is 680R, C47 is 221, R22 is 0, C27 is 1uF, C28, C29 is 1uF, C30 is 1uF, C31 is 104, C32 is 104, R32 is 4.7K, R33 is 47K, R106 is 0, C52 is 102, C53 is 101.

The host wireless communication circuit consists of an ATKMODULE and a capacitor C65, wherein C65 is 104.

The infrared sensor circuit of the host computer adopts 5V power supply and is connected with the 19-inch education of the main controller. The 3-pin of the infrared sensor is grounded.

The liquid crystal display circuit consists of a TFT-LCD, a capacitor C2 and a capacitor C3, wherein C2 is 104, and C3 is 104.

The slave machine comprises a slave machine controller circuit, a slave machine power management circuit, a slave machine voice recognition circuit, a slave machine wireless communication circuit and a slave machine infrared sensor circuit, wherein:

the slave controller circuit is composed of an STM32F407ZET6 single chip microcomputer, a crystal oscillator Y1, a crystal oscillator Y2, a capacitor C9, a capacitor C11, a resistor R16, a capacitor C13, a capacitor C14, a capacitor C19, a capacitor C20, a resistor R18, a capacitor C23, a capacitor C24, a resistor R19, a capacitor C48, a diode D2, a diode D3, a battery BAT1, a capacitor C33, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a resistor R100 and a capacitor C49. Wherein Y1 is 32.768kHz, Y2 is 8MHz, C9 is 10pF, C11 is 10pF, R16 is 1M, C13 is 22, C14 is 22, C19 is 225, C20 is 225, R18 is 10, C23 is 10uF, C24 is 104, R19 is 0, C48 is 104, D2 specification is 1N4148, D3 specification is 1N4148, C33 is 104, C34 is 104, C35 is 104, C36 is 104, C37 is 104, C38 is 104, C39 is 104, C40 is 104, C41 is 104, C42 is 104, C43 is 104, C44 is 104, R100 is 1k, and C49 is 225.

The slave power management circuit comprises a resistor R38, a light emitting diode DS4, a U5 voltage stabilization chip AMS1117-3.3, a capacitor C54, a capacitor C55, a capacitor C56, a U7 voltage stabilization chip AMS1117-3.3, a capacitor C63, a capacitor C62, a capacitor C64, a D6 diode and a D7 diode. Wherein R38 is 510R, C54 is 104, C55 is 10uF, C56 is 104, C63 is 104, C62 is 10uF, and C64 is 104. Model number D6 is SMBJ5.0A, model number D7 is SMBJ5.0A.

The slave voice recognition circuit comprises a WM 15 chip, a resistor R15, a capacitor C10, a capacitor C12, a capacitor C15, a capacitor C18, a resistor R17, a capacitor C21, a capacitor C22, a resistor R23, a resistor R25, a capacitor C45, a capacitor C46, a resistor R24, a resistor R21, a capacitor C47, a resistor R22, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a resistor R32, a resistor R33, a resistor R106, a capacitor C52, a capacitor C53 and a microphone. Wherein R15 is 0, C10 is 104, C12 is 10uF, C15 is 10uF, C18 is 104, R17 is 10R, C21 is 104, C22 is 10uF, R23 is 10K, R25 is 0, C45 is 10uF, C46 is 10uF, R24 is 47K, R21 is 680R, C47 is 221, R22 is 0, C27 is 1uF, C28, C29 is 1uF, C30 is 1uF, C31 is 104, C32 is 104, R32 is 4.7K, R33 is 47K, R106 is 0, C52 is 102, C53 is 101.

The slave wireless communication circuit consists of an ATKMODULE and a capacitor C65, wherein C65 is 104.

And the infrared sensor circuit of the slave machine adopts 5V power supply and is connected with the 19-inch teaching of the master controller. The 3-pin of the infrared sensor is grounded.

The invention has the beneficial effects that:

the invention relates to a refrigerator food storage time monitoring system, which is characterized in that the device is divided into a host machine and a slave machine, wherein the host machine is provided with a display screen and is arranged outside a refrigerator door, the slave machine is not provided with the display screen, the structure is small and exquisite, the slave machine can be arranged in a visible place such as a living room and the like, and a user can be reminded to eat food exceeding the storage time to the maximum extent. The different storage time of different storage modes of each food is established in the database, and the problem of different storage time of each food caused by different storage modes is solved. The voice recognition device comprises a voice recognition unit, a wireless communication unit, an online database and a storage unit, wherein the voice recognition unit is built locally, after receiving a voice message, the voice recognition unit firstly recognizes locally, if the local recognition unit cannot recognize locally, the wireless communication unit can be connected to the online voice library for recognition, the online database supports various dialects, has a self-learning function, solves the problems of slow, inaccurate, and incapable recognition of voice recognition, and meanwhile, the device supports manual input, and a user can add and delete food and modify storage time according to needs.

The invention aims at families with refrigerators as objects, records and manages food in the refrigerators for the families and reminds people of eating the food in time. The wireless communication unit is connected to a network, acquires weather messages and recommends a proper menu to a user according to food in the refrigerator. The slave machine can broadcast the residual food, weather conditions, air quality and the like in the refrigerator, can also finish service contents such as messages, reminding and the like, and can set timing or human body infrared triggering.

Drawings

FIG. 1 is a schematic structural view of the present invention; the main controller of the host is connected with the LCD, the voice recognition unit, the infrared sensor and the control end of the wireless communication unit, and the power management unit supplies power to each module unit of the host. The master controller of the slave machine is connected with the control ends of the wireless communication unit, the infrared sensor and the voice recognition unit, and the power management unit supplies power to each module unit of the slave machine. The master machine and the slave machine carry out Bluetooth communication through the wireless communication unit. The wireless communication unit of the host may access the open source voice library via WiFi.

FIG. 2 is a circuit diagram of a host controller of the present invention

FIG. 3 is a circuit diagram of host power management of the present invention

FIG. 4 is a circuit diagram of the host speech recognition of the present invention

FIG. 5 is a circuit diagram of a host wireless communication of the present invention

FIG. 6 is a circuit diagram of a host infrared sensor of the present invention

FIG. 7 is a circuit diagram of a liquid crystal display panel of the present invention

FIG. 8 is a circuit diagram of a hydraulic slave controller of the present invention

FIG. 9 is a circuit diagram of the power management of the liquid slave of the present invention

FIG. 10 is a circuit diagram of the speech recognition circuit of the liquid slave of the present invention

FIG. 11 is a wireless communication circuit diagram of a liquid slave machine according to the present invention

FIG. 12 is a circuit diagram of an infrared sensor of a liquid slave machine according to the present invention

FIG. 13 is a flowchart of the host computer of the present invention;

fig. 14 is a flow control diagram of the slave in the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, a refrigerator food storage duration monitoring system comprises a host and a slave, wherein the host and the slave are communicated through bluetooth:

the main machine can be arranged at the outer side of the refrigerator door;

The infrared sensor circuit of the main machine is used for detecting whether a user approaches the refrigerator or not. If someone approaches the refrigerator, the system enters a working state, and if no one is near the refrigerator, the refrigerator food storage duration monitoring system enters a low-power-consumption dormant state.

the wireless communication circuit of the master and the slave is used for establishing service communication between the master and the slave

The slave infrared sensor circuit is used for detecting whether a user exists around the refrigerator.

The main controller of the device is STM32F407ZET 6.

as shown in fig. 2, the host controller circuit includes an STM32F407ZET6 single chip microcomputer, a crystal oscillator Y1, a crystal oscillator Y2, a capacitor C9, a capacitor C11, a resistor R16, a capacitor C13, a capacitor C14, a capacitor C19, a capacitor C20, a resistor R18, a capacitor C23, a capacitor C24, a resistor R19, a capacitor C48, a diode D2, a diode D3, a battery BAT1, a capacitor C33, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a resistor R100, and a capacitor C49. Wherein Y1 is 32.768kHz, Y2 is 8MHz, C9 is 10pF, C11 is 10pF, R16 is 1M, C13 is 22, C14 is 22, C19 is 225, C20 is 225, R18 is 10, C23 is 10uF, C24 is 104, R19 is 0, C48 is 104, D2 specification is 1N4148, D3 specification is 1N4148, C33 is 104, C34 is 104, C35 is 104, C36 is 104, C37 is 104, C38 is 104, C39 is 104, C40 is 104, C41 is 104, C42 is 104, C43 is 104, C44 is 104, R100 is 1k, and C49 is 225. C9, C11 is added at two ends of Y1, C13 and C14 are added at two ends of Y2, and Y2 is connected with R16 in parallel. The C19 and C20 pins are connected to the

main controller

71 and 106 pins and are grounded. The pin 33 is connected with the R18 to be connected with 3.3V, the pin C23 is connected with the

33, 31 in parallel with the pin C24, and the pin 143 is grounded through the pin R19 and the pin 31.

Pins

16, 38, 51, 61, 83, 94, 107, 120, 130 are grounded, pins 30, 17, 52, 39, 62, 72, 84, 95, 108, 121, 131, 144 are grounded to 3.3V, C33, C34, C35, C36, C37, C38, C39, C40, C41, C42, C43, C44 are connected in parallel to 3.3V and ground.

As shown in fig. 3, the host power management circuit includes diodes of a resistor R38, a light emitting diode DS4, a U5 voltage stabilization chip AMS1117-3.3, a capacitor C54, a capacitor C55, a capacitor C56, a U7 voltage stabilization chip AMS1117-3.3, a capacitor C63, a capacitor C62, a capacitor C64, a D6, and a D7. Wherein R38 is 510R, C54 is 104, C55 is 10uF, C56 is 104, C63 is 104, C62 is 10uF, and C64 is 104. Model number D6 is SMBJ5.0A, model number D7 is SMBJ5.0A. DS4 is connected in series with R38, one end is connected to 5V, the other end is grounded, C54 and C55 are connected in parallel to 3.3V and connected to

pins

2 and 4 of U5, and pins 1 and 3 are added to two ends of C56 and respectively connected to 5V power supply and ground. C63 and C62 are connected in parallel to 3.3V and are connected with 2 and 4 pins of U7, and 1 and 3 pins are added to two ends of C64 and are respectively connected with a 5V power supply and ground. D6 and D7 are connected with 5V at one end and grounded at the other end.

As shown in fig. 4, the host speech recognition circuit is composed of a WM 15 chip, a resistor R15, a capacitor C10, a capacitor C12, a capacitor C15, a capacitor C18, a resistor R17, a capacitor C21, a capacitor C22, a resistor R23, a resistor R25, a capacitor C45, a capacitor C46, a resistor R24, a resistor R21, a capacitor C47, a resistor R22, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a resistor R32, a resistor R33, a resistor R106, a capacitor C52, a capacitor C53, and a microphone. Wherein R15 is 0, C10 is 104, C12 is 10uF, C15 is 10uF, C18 is 104, R17 is 10R, C21 is 104, C22 is 10uF, R23 is 10K, R25 is 0, C45 is 10uF, C46 is 10uF, R24 is 47K, R21 is 680R, C47 is 221, R22 is 0, C27 is 1uF, C28, C29 is 1uF, C30 is 1uF, C31 is 104, C32 is 104, R32 is 4.7K, R33 is 47K, R106 is 0, C52 is 102, C53 is 101. With 3.3V and 5V power supplies, pins 7, 8, 9, 10, 11 of WM8978 are connected to master controller pins 73, 74, 28, 29, 96, 139, and 140, respectively. C10 and C11 are connected in parallel with a 31 pin, C15 and C18 are connected in parallel with a 26 pin, pins 13 and 14 are connected with a 3.3V power supply through R17, C21 and C22 are connected with the ground, pins 18 are connected with R23 and are grounded, C27, C28, C29, C30, C31 and C32 are respectively connected with 1, 2, 4, 5, 19 and 20 and are connected with microphone, and pins 32 and 27 are grounded through C45, C46, R24, C47 and R21. R32, R33 and R106 are connected in series, and the left and right of R33 are respectively connected with C52 and C53 and grounded.

As shown in fig. 5, the host wireless communication circuit is composed of an atm modem and a capacitor C65, where C65 is 104. With 5V power, the wireless communication circuit 1-4 pins are connected to

pins

26,18,36 and 37 of the host controller. The 5 pin of the host wireless communication circuit is grounded.

As shown in fig. 6, the host infrared sensor circuit. 5V power supply is adopted and is connected with the 19-pipe teaching of the main controller. The 3-pin of the infrared sensor is grounded.

As shown in FIG. 7, the LCD circuit is composed of a TFT _ LCD, a capacitor C2 and a capacitor C3, wherein C2 is 104 and C3 is 104. The

pins

24 and 25 of the liquid crystal display circuit supply 3.3V, and the pin 28 supplies 5V. C2 is connected in parallel with C3 and is grounded. Pins 1-21, 23, 29-31, 33-34 of the LCD circuit are connected to

pins

127, 50, 119, 118, 25, 85-86, 114, 115, 58-68, 77-79, 76, 48, 49, 47, 7 and 46 of the main controller, respectively

as shown in fig. 8, the slave controller circuit is composed of an STM32F407ZET6 single chip microcomputer, a crystal oscillator Y1, a crystal oscillator Y2, a capacitor C9, a capacitor C11, a resistor R16, a capacitor C13, a capacitor C14, a capacitor C19, a capacitor C20, a resistor R18, a capacitor C23, a capacitor C24, a resistor R19, a capacitor C48, a diode D2, a diode D3, a battery BAT1, a capacitor C33, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a resistor R100, and a capacitor C49. Wherein Y1 is 32.768kHz, Y2 is 8MHz, C9 is 10pF, C11 is 10pF, R16 is 1M, C13 is 22, C14 is 22, C19 is 225, C20 is 225, R18 is 10, C23 is 10uF, C24 is 104, R19 is 0, C48 is 104, D2 specification is 1N4148, D3 specification is 1N4148, C33 is 104, C34 is 104, C35 is 104, C36 is 104, C37 is 104, C38 is 104, C39 is 104, C40 is 104, C41 is 104, C42 is 104, C43 is 104, C44 is 104, R100 is 1k, and C49 is 225. C9, C11 is added at two ends of Y1, C13 and C14 are added at two ends of Y2, and Y2 is connected with R16 in parallel. The C19 and C20 pins are connected to the

main controller

Pins

As shown in fig. 9, the slave power management circuit includes resistors R38, light emitting diodes DS4, U5, voltage stabilization chips AMS1117-3.3, capacitors C54, capacitors C55, capacitors C56, U7, voltage stabilization chips AMS1117-3.3, capacitors C63, capacitors C62, capacitors C64, D6 diodes, and D7 diodes. Wherein R38 is 510R, C54 is 104, C55 is 10uF, C56 is 104, C63 is 104, C62 is 10uF, and C64 is 104. Model number D6 is SMBJ5.0A, model number D7 is SMBJ5.0A. DS4 is connected in series with R38, one end is connected to 5V, the other end is grounded, C54 and C55 are connected in parallel to 3.3V and connected to

pins

As shown in fig. 10, the slave voice recognition circuit includes a WM 15 chip, a resistor R15, a capacitor C10, a capacitor C12, a capacitor C15, a capacitor C18, a resistor R17, a capacitor C21, a capacitor C22, a resistor R23, a resistor R25, a capacitor C45, a capacitor C46, a resistor R24, a resistor R21, a capacitor C47, a resistor R22, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a resistor R32, a resistor R33, a resistor R106, a capacitor C52, a capacitor C53, and a microphone. Wherein R15 is 0, C10 is 104, C12 is 10uF, C15 is 10uF, C18 is 104, R17 is 10R, C21 is 104, C22 is 10uF, R23 is 10K, R25 is 0, C45 is 10uF, C46 is 10uF, R24 is 47K, R21 is 680R, C47 is 221, R22 is 0, C27 is 1uF, C28, C29 is 1uF, C30 is 1uF, C31 is 104, C32 is 104, R32 is 4.7K, R33 is 47K, R106 is 0, C52 is 102, C53 is 101. With 3.3V and 5V power supplies, pins 7, 8, 9, 10, 11 of WM8978 are connected to master controller pins 73, 74, 28, 29, 96, 139, and 140, respectively. C10 and C11 are connected in parallel with a 31 pin, C15 and C18 are connected in parallel with a 26 pin, pins 13 and 14 are connected with a 3.3V power supply through R17, C21 and C22 are connected with the ground, pins 18 are connected with R23 and are grounded, C27, C28, C29, C30, C31 and C32 are respectively connected with 1, 2, 4, 5, 19 and 20 and are connected with microphone, and pins 32 and 27 are grounded through C45, C46, R24, C47 and R21. R32, R33 and R106 are connected in series, and the left and right of R33 are respectively connected with C52 and C53 and grounded.

As shown in fig. 11, the slave wireless communication circuit is composed of an atm modem and a capacitor C65, where C65 is 104. With 5V power, the wireless communication circuit 1-4 pins are connected to

pins

As shown in figure 12, the infrared sensor circuit of the slave machine is powered by 5V and is connected with the 19-inch teaching of the master controller. The 3-pin of the infrared sensor is grounded.

The working principle of the invention is as follows:

specifically, the device master and the slave master are STM32F407ZET6, and the circuit diagram thereof is shown in FIG. 3. STM32F407ZET6 employs an ARM Cortex-M4 core with 1MB of on-chip FLASH memory, 192KB of SRAM. The clock frequency of the controller can reach 168MHz at most, FPU and DSP instructions are integrated, and the floating point operation capability of the chip is improved. 1 SDIO interface drives the SD card, 2 DMA controllers (16 passageways altogether) transmit audio data, 1 FSMC interface, drive LCD screen, 1 RTC (take the calendar function), for the system provides accurate local time, provides 2 full duplex I2S and WM S communication, 6 UARTs satisfy Wi-Fi and bluetooth communication.

The device host computer and slave computer voice recognition unit chips are WM8978, and the circuit diagram is shown in FIG. 3. WM8978 is a fully functional audio processor. The system is provided with an HI-FI level digital signal processing inner core which supports the enhancement of 3D hardware surround sound effect and a hardware equalizer of 5 frequency bands, so that the tone quality can be effectively improved; and a programmable notch filter to remove noise. The support to the microphone is integrated to and be used for a strong and brisk speaker power amplifier, can provide the high quality sound effect speaker power up to 900 mW. WM S supports an I2S interface, supports speaker output, supports stereo differential input/microphone input, supports independent left and right channel volume adjustment, etc.

The wireless communication units of the device host are an ESP8266 Wi-Fi module and Bluetooth, and the circuit diagram of the wireless communication unit is shown in FIG. 4. The ESP8266 is a high-performance UART-Wi-Fi module, the module adopts a serial port to communicate with the MCU, a TCP/IP protocol stack is arranged in the module, conversion between the serial port and Wi-Fi can be realized, and own data can be transmitted through a network through serial port configuration. The network standard supports IEEE 802.11b, IEEE 802.11g and IEEE 802.11 n; the wireless transmission rate can reach 11Mbps at most; the frequency range is 2.412GHz-2.484 GHz; the transmitting power is 11-18 dbm; an on-board PCB antenna.

As shown in FIG. 5, the mpu6050 circuit designed in the host circuit of the present invention is used for measuring the angle of the refrigerator door; the designed Flash circuit is used for storing parameters set by a user according to the preference of the user, and the designed SD card circuit is used for storing food information in the refrigerator; the photoelectric sensing unit is designed to measure distance and judge whether a person approaches; the designed LCD is used for displaying food and the like stored in the refrigerator; the designed power management unit is used for reducing the system power consumption and saving the electric quantity.

As shown in fig. 6 and 7, the working mode of the host of the present invention is to load data from the SD card after power-on, determine whether food is overtime, if yes, remind the user, and if no, sleep. And in the sleeping process of the system, voice awakening is supported, and after awakening, the system interacts with a user through the voice recognition unit. The voice database is built locally, after the voice message is received, matching is firstly carried out locally, and if matching fails, the matching is uploaded to an open source voice database of the server through Wi-Fi for recognition. Food is added when food is stored, and food is taken, so that the quantity of the food is reduced or the food is deleted. And after the food is stored in the refrigerator, timing is started, the storage time length of the food in the database is matched according to the storage mode, the optimal number of days for eating is calculated, and the user is reminded to eat the food in time if the food is still not eaten when the time is up. The working mode of the slave machine is that after the system is powered on, the slave machine communicates with the host machine through Bluetooth, and if food is overtime, the host machine sends a message to the slave machine to jointly remind a user of processing. After receiving the voice message, the slave computer performs recognition and matching locally, if not, the slave computer transmits the voice message to the host computer through Bluetooth for recognition, and then provides service functions of recommending menus to users, broadcasting food stored in the refrigerator, weather conditions, air quality, leaving messages, reminding and the like according to the returned message.

In order to improve the accuracy of the optimal food storage duration of the invention, particularly for meat, vegetables, cooked food and other foods lacking a definite storage duration, the invention establishes a volatile basic nitrogen (TVB-N) prediction model according to the interaction of 'microorganism-microorganism' and 'microorganism-environment'. The following is exemplified by frozen pork. The method analyzes the correlation of the TVB-N value, the pH value, the water activity (Aw) and the sensory quality of pork at the refrigeration temperature, and combines the first-order reaction kinetics equation fitting parameters (k, R)²) And determining that the TVB-N is a key factor of the quality change of the refrigerated pork. Further utilizes the XGboost model to establish refrigeration with TVB-N as an indexPork storage duration prediction model. Meanwhile, sensory evaluation is carried out by referring to the sensory evaluation standard of chilled pork of the agricultural industry standard of the people's republic of China, and volatile basic nitrogen (TVB-N) is measured by referring to a semi-trace nitrogen determination method in the analytical method of meat and meat product sanitation standard.

The following data collection points were established by analyzing the refrigerator cold storage temperature, typically 3-10 deg.C:

model building group: taking a fresh refrigerated pork sample, unfreezing at 4 ℃, and respectively refrigerating in thermostats at 0, 2, 4, 6 and 8 ℃. During the cold storage period, samples were taken every 12h at 0, 2, 4, 6, 8 ℃ for sensory quality evaluation and physicochemical quality determination, and 3 replicates per group were used.

Model validation group: taking a fresh refrigerated pork sample, unfreezing at 4 ℃, respectively putting the fresh refrigerated pork sample in a 0, 4, 6 and 8 ℃ thermostat for refrigeration, sampling every 12 hours at 0, 2, 4, 6 and 8 ℃ during refrigeration, and carrying out sensory quality evaluation and physical and chemical quality determination, wherein each group is repeated for 3 times.

The results in table 1 were obtained by preprocessing the data, modeling, and testing. The result shows that the relative error of the TVB-N prediction model of the pork built based on the XGboost is controlled to be about 10% by comparing the real measured TVB-N value with the predicted value, and the built model can quickly and accurately predict the storage time of the pork to be refrigerated in the refrigerator within an acceptable range.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a long monitoring system of refrigerator food storage, includes host computer, follows the machine, host computer, follow the machine and pass through bluetooth UNICOM, its characterized in that:

the host comprises a host controller circuit, a host power management circuit, a host voice recognition circuit, a host wireless communication circuit, a host infrared sensor circuit and a liquid crystal display circuit, wherein the host power management circuit is used for controlling the power of the whole device and automatically switching a main power supply and a standby power supply;

the slave machine comprises a slave machine controller circuit, a slave machine power management circuit, a slave machine voice recognition circuit, a slave machine wireless communication circuit and a slave machine infrared sensor circuit; the slave controller circuit is respectively connected with signal control ends of the slave voice recognition circuit, the slave wireless communication circuit and the slave infrared sensor circuit, and the slave power management circuit is connected with a power supply end of the slave controller circuit;

the host can be arranged on the outer side of the refrigerator door and can interact with a user in time;

the liquid crystal display screen is connected with the main controller of the host computer to display the type, the quantity and the remaining storage time of food in the refrigerator;

the host power management circuit is used for supplying power to the host controller circuit and ensuring the normal operation of the host controller;

the host infrared sensor circuit is used for detecting human body infrared trigger;

the slave controller circuit is used for controlling the operation state of each module circuit connected with the slave;

the slave power management circuit is used for supplying power to the slave controller circuit to ensure the normal operation of the slave;

the host and slave wireless communication circuit is used for establishing service communication between the host and the slave;

the slave infrared sensor circuit is used for detecting human body infrared trigger;

2. The system as claimed in claim 1, wherein said main controller of the apparatus is STM32F407ZET 6.

3. The system as claimed in claim 1, wherein the host controller circuit is provided with a local food storage duration database, and after the food is stored in the refrigerator, the optimal number of days for storing the food is calculated according to the storage mode of the food, and when the time is up, the user is reminded to eat the food in time through voice.

4. The system for monitoring the storage time of food in refrigerator according to claim 1, wherein said host comprises a host controller circuit, a host power management circuit, a host voice recognition circuit, a host wireless communication circuit, a host infrared sensor circuit, and a liquid crystal display circuit, wherein:

the host controller circuit comprises an STM32F407ZET6 singlechip, a crystal oscillator Y1, a crystal oscillator Y2, a capacitor C9, a capacitor C11, a resistor R16, a capacitor C13, a capacitor C14, a capacitor C19, a capacitor C20, a resistor R18, a capacitor C23, a capacitor C24, a resistor R19, a capacitor C48, a diode D2, a diode D3, a battery BAT1, a capacitor C33, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a resistor R100 and a capacitor C49; wherein Y1 is 32.768kHz, Y2 is 8MHz, C9 is 10pF, C11 is 10pF, R16 is 1M, C13 is 22, C14 is 22, C19 is 225, C20 is 225, R18 is 10, C23 is 10uF, C24 is 104, R19 is 0, C48 is 104, D2 specification is 1N4148, D3 specification is 1N4148, C33 is 104, C34 is 104, C35 is 104, C36 is 104, C37 is 104, C38 is 104, C39 is 104, C40 is 104, C41 is 104, C42 is 104, C43 is 104, C44 is 104, R100 is 1k, C49 is 225;

the host power management circuit comprises a resistor R38, a light emitting diode DS4, a U5 voltage stabilization chip AMS1117-3.3, a capacitor C54, a capacitor C55, a capacitor C56, a U7 voltage stabilization chip AMS1117-3.3, a capacitor C63, a capacitor C62, a capacitor C64, a D6 diode and a D7 diode; wherein R38 is 510R, C54 is 104, C55 is 10uF, C56 is 104, C63 is 104, C62 is 10uF, C64 is 104, D6 is SMBJ5.0A, D7 is SMBJ5.0A;

the host voice recognition circuit comprises a WM8978 chip, a resistor R, a capacitor C, a resistor R, a resistor C, a capacitor C, a resistor R, a capacitor C, a resistor R106, a capacitor C and a microphone, wherein R is 0, C is 104, C is 10uF, C is 104, R is 10R, C is 104, C is 10uF, R is 10K, R is 0, C is 10uF, R is 47K, R is 680R, C is 221, R is 0, C is 1uF, C is 104, R is 4.7K, R is 47K, R is 101, R is 0, and C is 102;

the host wireless communication circuit consists of an ATKMODULE and a capacitor C65, wherein C65 is 104;

the infrared sensor circuit of the host computer is powered by 5V and is connected with the 19-inch education of the main controller, and the 3 pins of the infrared sensor are grounded;

5. The system for monitoring the food storage time of the refrigerator as claimed in claim 1, wherein the slave machine comprises a slave machine controller circuit, a slave machine power management circuit, a slave machine voice recognition circuit, a slave machine wireless communication circuit and a slave machine infrared sensor circuit, wherein:

the slave controller circuit consists of an STM32F407ZET singlechip, a crystal oscillator Y, a capacitor C, a resistor R, a diode D, a battery BAT, a capacitor C, a resistor R100 and a capacitor C, wherein Y is 32.768kHz, Y is 8MHz, C is 10pF, R is 1M, C is 22, C is 225, R is 10, C is 10uF, C is 104, R is 0, C is 104, D is 1N4148, C is 104, and C is 104, c42 is 104, C43 is 104, C44 is 104, R100 is 1k, C49 is 225;

the slave power management circuit comprises a resistor R38, a light emitting diode DS4, a U5 voltage stabilization chip AMS1117-3.3, a capacitor C54, a capacitor C55, a capacitor C56, a U7 voltage stabilization chip AMS1117-3.3, a capacitor C63, a capacitor C62, a capacitor C64, a D6 diode and a D7 diode, wherein the R38 is 510R, the C54 is 104, the C55 is 10uF, the C56 is 104, the C63 is 104, the C62 is 10uF, the C64 is 104, the D6 is SMBJ5.0A, and the D7 is SMBJ5.0A;

the slave voice recognition circuit consists of a WM8978 chip, a resistor R, a capacitor C, a resistor R, a capacitor C, a resistor R, a capacitor C, a resistor R106, a capacitor C and a microphone, wherein R is 0, C is 104, C is 10uF, C is 104, R is 10R, C is 104, C is 10uF, R is 10K, R is 0, C is 10uF, R is 47K, R is 680R, C is 221, R is 0, C is 1uF, C is 104, R is 4.7K, R is 47K, R is 101, R is 0, and C is 102;

the slave wireless communication circuit consists of an ATKMODULE and a capacitor C65, wherein C65 is 104;

the infrared sensor circuit of the slave machine is powered by 5V and is connected with the 19-inch teaching of the main controller, and the 3 pins of the infrared sensor are grounded.