CN112802281A

CN112802281A - Self-service meal selling equipment, system and method

Info

Publication number: CN112802281A
Application number: CN202110116863.5A
Authority: CN
Inventors: 刘初声; 潘东青
Original assignee: Guangzhou Jianshihui Information Technology Co ltd
Current assignee: Guangzhou Jianshihui Information Technology Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-05-14

Abstract

The invention discloses self-service meal selling equipment, a self-service meal selling system and a self-service meal selling method, wherein the self-service meal selling equipment comprises a main controller, and a weighing sensor, an identification code reading unit and a communication unit which are connected with the main controller; the identification code reading unit reads the identification code information, and based on the identification code information read by the identification code reading unit and the identification code information bound with the user account, a dish taking user can be determined; the weighing sensor detects the weight of the dishes on the meal selling equipment, and the main controller can determine the weight of the dishes according to the change (decrement) of the weight information based on the weight information detected by the weighing sensor. The self-service meal selling equipment is connected with the server through the communication unit. The invention can accurately calculate the amount of dishes taken by diners, and the diners can take the amount of dishes by oneself according to the dinning requirements, thereby effectively avoiding the waste phenomenon; the invention can save labor cost and equipment cost, greatly improves the efficiency of meal selling, and is more suitable for the current fast-paced life, study and work.

Description

Self-service meal selling equipment, system and method

Technical Field

The invention relates to the technical field of intelligent meal selling, in particular to self-service meal selling equipment, a self-service meal selling system and a self-service meal selling method.

Background

In the traditional group meal, the tasks of dish distribution, dish selling, charging and the like are all completed manually, a dish distributor is generally arranged in each dish selling window, in the traditional meal, particularly in places with many diners, such as schools, factories and the like, the phenomenon that a long team waits for the dish distributor to manually prepare dishes usually occurs at the time of meal ordering, the diners cannot select favorite dish collocation and quantity at will except for waiting for a long time, and the experience is poor, so that the traditional manual meal selling mode has the problems of low efficiency and high service labor cost, poor experience of diners and incapability of adapting to continuously improved meal requirements.

At present, some self-service meal selling modes also appear on the market, for example, various dishes are manually placed in dishes which can be identified by a machine according to the price in advance, diners can only self-select the whole dishes which are ordered, the dishes cannot be selected according to the amount required by the diners, the dishes with different shapes or colors are identified by adopting a video image identification technology during checkout, the price is calculated by finding out the corresponding dishes, or the price is calculated by embedding an RFID chip (electronic tag) into the dishes to identify an ID number and finding out the corresponding dishes, in this way, special diners are still needed, the labor cost cannot be saved, in addition, in this meal selling mode, the amount of dishes in the same dish is fixed, the diners cannot select the corresponding amount according to the needs of the diners, therefore, in this situation, the situation that the dishes are not eaten completely easily occurs, resulting in relatively large waste. Other self-service meal selling platforms or systems are also available on the market at present, but basically, the defects that the cost of equipment cannot be sold or sold according to the volume is high and the like exist.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a self-service meal selling device which can accurately calculate the amount of dishes taken by diners, so that the diners can take the amount of the dishes by themselves according to the meal demands, waste can be effectively avoided, the equipment cost and labor cost of meal selling are effectively reduced, the meal selling efficiency is greatly improved, and the self-service meal selling device is more suitable for fast-paced life, study and work at present.

The second purpose of the invention is to provide a self-service meal selling system, which can automatically account based on the weight information of the dishes taken by the diners, and the diners can realize self-payment through a payment platform based on bills, so that the convenience of the self-service meal selling is improved.

The third purpose of the invention is to provide a self-service meal selling method.

The first purpose of the invention is realized by the following technical scheme: a self-service meal selling device comprises a main controller, a weighing sensor, an identification code reading unit and a communication unit;

the identification code reading unit is used for reading identification code information;

the main controller is connected with the identification code reading unit and is used for acquiring the identification code information read by the identification code reading unit;

the weighing sensor is used for collecting the weight of dishes on the meal selling equipment;

the main controller is connected with the weighing sensor and is used for determining the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor and determining the weight of the dishes according to the change of the weight information;

the main controller is connected with the communication unit, the communication unit is connected to the server through a network to realize service function communication, and service associated communication can be realized with other terminals through the server.

Preferably, the communication unit is one or more of a first communication unit, a second communication unit, a third communication unit and a fourth communication unit;

the first communication unit comprises a 4G/5G communication unit connected with the main controller;

the second communication unit comprises a WIFI communication unit connected with the main controller;

the third communication unit comprises a wired Ethernet communication unit connected with the main controller;

the fourth communication unit comprises a CAN transceiver connected with the main controller, the main controller is connected to a CAN bus through the CAN transceiver, and the CAN bus protocol converter is used for communicating with a wired Ethernet through 4G/5G, WIFI.

Preferably, the device also comprises a heating control system; the heating control system comprises a first switch tube, a second switch tube, a photoelectric coupler, a bidirectional thyristor switch and a relay; the photoelectric coupler is an optical coupling silicon controlled rectifier;

the positive input end of the photoelectric coupler is connected with the positive power supply end, and the negative input end of the photoelectric coupler is grounded through the first switching tube; or the input positive end of the photoelectric coupler is connected with the positive end of the power supply through the first switching tube, and the input negative end of the photoelectric coupler is grounded; the first switching tube is connected to the main controller, and the main controller controls the working state of the photoelectric coupler by controlling the state of the first switching tube;

one end of the relay coil is connected with a power supply, and the other end of the relay coil is grounded through a second switch tube; or one end of the relay coil is connected with the power supply through the second switch tube, and the other end of the relay coil is grounded; the second switching tube is connected with the main controller, and the main controller controls the working state of the relay by controlling the state of the second switching tube; the relay comprises at least two pairs of dynamic contact switches;

the output of the photoelectric coupler is connected with the bidirectional thyristor switch;

the first port T1 of the bidirectional thyristor switch is connected with the moving contact of the first pair of contact switches of the relay, and the second port T2 is connected to the live wire of the alternating current power supply; the movable contacts of the second pair of contact switches of the relay are connected to the zero line of the alternating current power supply; or the first port T1 of the bidirectional thyristor switch is connected to the zero line of the alternating current power supply, the second port T2 of the bidirectional thyristor switch is connected to the movable contacts of the first pair of contact switches of the relay, and the movable contacts of the second pair of contact switches of the relay are connected to the live line of the alternating current power supply; the movable contact points of the first pair of contact point switches and the second pair of contact point switches of the relay are connected to the dish heating device and used for heating the dish heating device in an electrified mode.

Preferably, the system also comprises a dish supplementing switch and/or a weighing proportion coefficient adjusting lead sealing switch which are connected with the main controller; the main controller is controlled to enter a dish supplementing mode through the dish supplementing switch, and the main controller is controlled to enter a maintenance mode and to allow the changed weighing proportionality coefficient to be stored through the weighing proportionality coefficient adjusting lead sealing switch.

Preferably, the system also comprises one or more of the following devices connected with the main controller: the device comprises a display screen, a USB interface, a voice prompt and alarm unit, a light alarm unit and an external memory;

the identification code reading unit comprises a bar code/two-dimensional code scanner or a camera; the voice prompt and alarm unit comprises a voice chip connected with the main controller, and the voice chip is connected with a loudspeaker or a sound box;

the light alarm unit comprises an LED lamp connected with the main controller, and the main controller controls the LED lamp to be turned on or off;

the self-service meal selling equipment also comprises a power supply device for supplying power; the power supply device comprises an AC/DC switching power supply module and a lithium battery pack, wherein the output end of the switching power supply module is connected with the lithium battery pack in parallel and is used as the power supply output end of the power supply device, and the input end of the switching power supply module is connected with commercial power; a switch is arranged on a power supply output circuit connected with the output end of the power supply device, and the power supply state of the self-service meal selling equipment is controlled through the switch; the power output end of the power supply device is connected with the voltage reduction device, and the required working voltage of the electronic circuit after voltage reduction is obtained through the voltage reduction device.

The second purpose of the invention is realized by the following technical scheme: a self-service meal selling system comprises a server and self-service meal selling equipment of a first purpose of the invention; the main controller in the self-service meal selling equipment communicates with the server through the communication unit;

the self-service meal selling equipment comprises:

the server is used for sending the identification code information read by the identification code reading unit to the server;

the server is used for sending the weight information of the dishes or the weight information of the dishes and the calculated amount information to the server;

the server:

the system comprises a user terminal, a user interface and a user interface, wherein the user interface is used for prompting a user to register a user account when identification code information sent by the user terminal is received for the first time, and binding the identification code information with the user account after the registration is successful; the system comprises a user account and a server, wherein the user account is used for receiving identification code information and binding the identification code information to a corresponding user account;

the self-service meal selling equipment is used for receiving the identification code information sent by the self-service meal selling equipment and then determining a user account bound by the received identification code information;

and the accounting information is attributed to the user account bound with the identification code information, so that the corresponding user account can pay through the payment platform.

Preferably, the meal selling system further comprises a tray, wherein a first identification code read by an identification code reading unit of the self-service meal selling equipment and a second identification code scanned by the user terminal are arranged on the tray; the second identification code stores the server domain name and the identification code information in the first identification code; after scanning the second identification code, the user terminal accesses a server corresponding to the domain name, and sends identification code information in the first identification code read by the user terminal from the second identification code to the server corresponding to the domain name through a user account, so that the server binds the identification code information in the first identification code of the tray to the corresponding user account;

one or more self-service meal selling devices are provided;

when the communication unit in the self-service meal selling equipment is the fourth communication unit, the main controller of each self-service meal selling equipment is connected to the CAN bus through the CAN transceiver, the CAN bus is connected with the CAN protocol converter, and the CAN protocol converter is in communication connection with the server through a 4G/5G communication network, a WIFI communication network or a wired Ethernet.

The third purpose of the invention is realized by the following technical scheme: a method of self-service meal sale, comprising:

when the server receives the identification code information sent by the user terminal for the first time, prompting the user to register the user account, and binding the identification code information with the user account after the registration is successful; the server receives the identification code information and binds the identification code information to the corresponding user account;

the identification code reading unit of the self-service meal selling equipment reads identification code information and sends the information to the main controller, the main controller sends the information to the server through the communication unit, the server inquires whether the identification code is bound with the user account and replies to the main controller, and the main controller replies according to a reply result: if the binding is performed, entering a dish selling mode, and if the binding is not performed, prompting the binding;

after entering a dish selling mode, a weighing sensor of the self-service dish selling equipment collects the weight of dishes on the self-service dish selling equipment and sends collected information to a main controller, and the main controller determines the weight of the dishes on the self-service dish selling equipment according to the information collected by the weighing sensor and determines the weight of the dishes according to the change of the weight information;

after the meal taking is finished, the main controller subtracts the weight when the meal taking is started in the meal selling mode from the rest weight when the meal taking is finished, calculates the weight of the current meal taking, calculates the corresponding amount information of the dishes taken by the diner by using the weight, and sends the amount information to the server through the communication unit; or after the meal taking is finished, the main controller subtracts the weight when the meal taking is started in the meal selling mode from the remaining weight when the meal taking is finished, calculates the weight of the current meal taking, sends the weight of the taken meal to the server, and calculates the corresponding amount of money of the meal taken by the diner by the server;

after receiving the identification code information and the weight of the dishes sent by the self-service meal selling equipment, the server determines the user account number bound by the received identification code information, performs accounting according to the weight of the dishes taken and the corresponding amount information, and belongs the accounting information to the user account number bound by the identification code information, so that the corresponding user account number performs payment and settlement through the payment platform based on the accounting information.

Preferably, the identification code information received by the server includes registered identification code information sent by a registered user account, and the server binds the user account with the identification code information sent by the user account;

preferably, when the self-service meal selling equipment comprises a display screen, after entering a meal selling mode, the main controller of the self-service meal selling equipment calculates the weight of the obtained dishes in real time, calculates the corresponding amount of the weight according to the stored names and unit prices of the dishes, and displays and informs a meal taker in real time through the display screen;

when the self-service meal selling equipment is not provided with a display screen, after entering a meal selling mode, the server receives weight information of dishes sent by the main controller, calculates corresponding amount of the weight of the dishes on the self-service meal selling equipment according to the name and unit price of the dishes stored in the server, and sends the amount of the corresponding amount of the weight of the dishes to the user terminal corresponding to the user account bound by the identification code in real time for display;

preferably, the self-service meal selling method further comprises the following steps:

after the server binds the user account and the identification code information, if the accounting information corresponding to the identification code is not received within a certain period of time, automatically settling accounts and deducting money of the user account bound with the identification code and unbinding the account;

preferably, the self-service meal selling method further comprises the following steps: after receiving a unbinding request for a specified identification code sent by a user application program, the server performs account settlement and money deduction and unbinding on the specified identification code bound in the corresponding user account;

after the server binds the user account and the identification code information, if the identification code does not generate accounting information after a certain time, the server unbinds the identification code and the corresponding user account;

preferably, the self-service meal selling method further comprises the following steps: the dining recommendation is as follows:

the server acquires user body indexes sent by a user account, and sends corresponding menu information suitable for being eaten by the user to the user account based on the user body indexes and the current dish information;

the server determines the dining habits of the user based on the information of the dishes taken by the user in the past under the account number of the user, and recommends menu information to the user based on the dining habits of the user.

Preferably, the self-service meal selling method further comprises the step of supplementing the dishes in one of the following ways:

the first method comprises the following steps: the self-service meal selling equipment enters a dish supplementing mode under the switching of a dish supplementing switch; in the dish supplementing mode, the weighing sensor collects weight information of dishes on the self-service meal selling equipment and sends the collected information to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and determines the supplemented weight of the dishes and the weight of the dishes after the dishes are supplemented according to the change of the weight information; after the dish supplementing is finished, the dish supplementing mode is quitted by operating a dish supplementing switch;

and the second method comprises the following steps: the self-service meal selling equipment also sends the identification code information to the server after the identification code reading unit reads the identification code information for dish supplement, and enters a dish supplement mode when the identification code information replied by the server is the dish supplement identification code; in the dish supplementing mode, the weighing sensor collects weight information of dishes on the self-service meal selling equipment and sends the collected information to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and determines the supplemented weight of the dishes and the weight of the dishes after the dishes are supplemented according to the change of the weight information; after the dish supplementing is finished, the dish supplementing mode exits by reading the identification code information for supplementing the dish again;

and the third is that: the self-service meal selling equipment enters a dish supplementing mode under the switching of a dish supplementing switch and under the condition that the identification code reading unit reads identification code information for supplementing dishes; in the dish supplementing mode, the weighing sensor collects weight information of dishes on the self-service meal selling equipment and sends the collected information to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and determines the supplemented weight of the dishes and the weight of the dishes after the dishes are supplemented according to the change of the weight information; after the dish supplementing is finished, the dish supplementing mode exits by operating a dish supplementing switch and/or reading identification code information for supplementing the dish;

and fourthly: the method comprises the steps that when the self-service meal selling equipment receives a dish supplementing instruction transmitted by a server from a remote user terminal APP, a dish supplementing mode is entered, and the specific process is the same as the first process;

under the condition that the identification code information is not scanned by an identification code reading unit of the self-service meal selling equipment, if the main controller detects that the weight of the dishes is suddenly reduced, the main controller drives to alarm; the sudden weight reduction means that the stable weight reduction in unit time exceeds a set tolerance threshold.

After receiving the identification code information sent by the identification code reading unit of the self-service food selling equipment, if the server determines that the identification code information is not bound to the user account, sending an instruction that the current identification code information is not bound to the self-service food selling equipment, and sending a prompt to remind a user to bind the identification code and then take the food or drive an alarm by the self-service food selling equipment;

in the non-dish supplementing mode, if the main controller detects that the weight of dishes is increased, the weight is automatically updated;

when entering a maintenance mode and using a maintenance interface to calibrate the scale, firstly clicking a zero clearing button, when a main controller receives a weight zero clearing instruction sent by an input device connected with the main controller or other terminals communicated with the main controller, saving a current acquisition value of a weighing sensor into a variable b to update the variable b, thereby clearing the weight, then putting a weight with a specified weight on the weighing sensor, inputting the weight of the weight, then clicking a weight setting button, when the main controller receives the reset instruction, acquiring an acquisition value x after the weighing sensor is put with a legal code, subtracting the acquisition value b from the acquisition value x, and then taking the acquisition value x as a denominator to remove the weight, thus obtaining the weighing proportionality coefficient a.

Compared with the prior art, the invention has the following advantages and effects:

(1) the invention discloses self-service meal selling equipment which comprises a main controller, and a weighing sensor, an identification code reading unit and a communication unit which are connected with the main controller; the identification code reading unit reads the identification code information, and the dish taking user can be determined based on the information of the identification code read by the identification code reading unit and bound with the user account; the weighing sensor detects the weight of the dishes on the food selling equipment, and the main controller can determine the weight of the dishes according to the change of the weight information based on the weight information detected by the weighing sensor; therefore, the meal selling equipment can accurately calculate the dish taking amount of the diners, so that the diners can take the dish according to the meal demand, and the waste phenomenon can be effectively avoided; the price can be accurately calculated based on the dish taking amount information of the diners acquired by the equipment, so that a large amount of labor can be saved; the meal selling equipment can greatly improve the meal selling efficiency and is more suitable for the current fast-paced life, study and work. In addition, the corresponding user is identified based on the identification code bound to the user account, the identification code can be a two-dimensional code, a bar code and the like, and compared with the mode of adopting an RFID label in the prior art, the method adopts the identification code mode, and has the advantages of low equipment cost, stable and reliable quality, no interference of an external electromagnetic field and the like.

(2) In the self-service meal selling equipment, the main controller CAN be connected with various communication units to realize communication with a cloud server of a system through various communication modes, specifically, WIFI communication, 4G/5G communication, wired Ethernet communication and CAN bus communication CAN be realized, and wiring is not needed based on the modes of WIFI and 4G/5G communication, so that the self-service meal selling equipment is suitable for occasions needing frequent movement and few equipment, and the connection number of service ends CAN be effectively reduced, the data flow is effectively saved, and the network overhead is saved in the occasions where the self-service meal selling equipment is more and densely arranged based on the mode of CAN bus communication.

(3) The self-service meal selling equipment further comprises a heating control system, and the main controller can control the heat preservation heating device of the dishes through the heating control system, so that the heat preservation heating function of the dishes is realized. In the invention, the on-off switch of the power supply of the heating control system adopts a contactless silicon controlled switch, and based on the contactless silicon controlled switch, the main controller can use a PID control principle to enable the temperature transition to be more stable.

(4) The self-service meal selling equipment further comprises a dish supplementing switch, wherein the dish supplementing switch is connected with the main controller and is used for controlling the main controller to enter a dish supplementing mode, and in the dish supplementing mode, the main controller can record the weight of a supplemented dish and the weight of a dish after supplement so as to provide accurate dish weight data for subsequent meal selling. In addition, a dish supplementing mode can be entered based on the identification code information for supplementing dishes, so that a dish supplementing function is completed; or communicate with APP on the user terminal equipment (such as a mobile phone) connected through the server, replace the touch screen operation on the equipment to mend dishes and maintain the operation through the interface on the APP, just so can cancel the touch screen on the self-service meal selling equipment, can be the equipment that does not have screen display even, reach and can greatly reduce manufacturing cost.

(5) In the self-service meal selling equipment, a weighing proportionality coefficient adjusting lead seal switch connected with the main controller can be further arranged, the weighing proportionality coefficient adjusting lead seal switch controls the main controller to be electrified to enter a maintenance mode and allows the proportion coefficient of the weighing sensor to be changed, so that the lead seal locking is required after the metering setting of the pricing electronic scale by national regulations, and the mandatory requirement of self-changing of a user is prevented.

(6) The self-service meal selling equipment can also be provided with a display screen, a USB interface, a voice prompt and alarm unit, a light alarm unit and an external memory which are connected with the main controller.

The main controller can display dish information, dish weight and pricing information, current accumulated consumption amount information of diners and the like through the display screen, the display screen can be a touch screen with a touch function, the touch screen is connected with the main controller and can be used as field input equipment of the main controller, and human-computer interaction can be realized on the basis; in addition, the display screen can also be not provided with a touch screen, and is communicated with an APP on user terminal equipment (such as a mobile phone) connected through a server to serve as interactive input equipment, so that man-machine interaction is realized.

In the invention, the main controller can be connected with the equipment of the printer based on the USB interface, and the takeaway delivery order, the accounting receipt and the like can be printed by the printer. In addition, the main controller can realize the functions of acousto-optic reminding diners of correcting misoperation behaviors or alarming to call a site manager to go to the site for help and the like based on the voice prompt and alarm unit and the light alarm unit; for example, when the main controller detects that the weight of dishes is reduced under the condition that the main controller does not receive the identification code information, an alarm can be triggered, and the phenomenon that a user can not settle accounts because the dishes are directly taken under the condition that the equipment does not read the identification code is avoided.

In the invention, the main controller can expand the storage container through the external memory, the external memory comprises an EEPROM, an RAM, a FLASH and other memories, wherein the EEPROM is used as an electrically erasable memory, can store some set data (such as the current name of dishes, unit price and the like) applied by the main controller, and cannot be lost when the power is off; the RAM in the single chip microcomputer can be expanded through the RAM, a large amount of temporary data (such as screen display data required to be set by a remote end for advertisements) can be stored, the FLASH can be expanded when the capacity of the FLASH in the single chip microcomputer is insufficient, the expansion cost is low, the FLASH is suitable for storing some data which are used less or have low read-write speed requirements (such as application program firmware packages to be stored in the automatic upgrading process), and based on the external memory, the flexible, stable and efficient work of the self-service meal selling equipment can be guaranteed.

(7) In the self-service meal selling equipment, the power supply device comprises the AC/DC power supply module and the lithium battery pack, so that the self-service meal selling equipment can work when being connected with commercial power or not, and the power supply device is connected with the power switch on the circuit of the connecting end of the power supply output to the main control board, so that the lithium battery pack can be charged through the commercial power under the condition that the self-service meal selling equipment is not in work when being powered off. Under the condition that the commercial power is connected into the self-service meal selling equipment, the heating device can be controlled by the heating control equipment to heat, so that dishes are kept at a certain temperature.

(8) The self-service meal selling system comprises a server, self-service meal selling equipment and a meal taking tray, wherein a main controller in the self-service meal selling equipment is communicated with the server through a communication unit; the server can be configured in a cloud platform or a local configuration mode, and is used for prompting a user to perform account registration (to authorize a secret-free payment by a third-party payment platform or to perform pre-recharging by an automatically-allocated account of a system) by the user terminal through an application program when the user terminal scans a two-dimensional code on a tray for the first time, receiving identification code information sent by the user terminal corresponding to the user account (for example, by scanning the two-dimensional code on the tray) in advance before meal taking, binding the user account with the identification code information sent by the user account, sending the identification code information read by an identification code reading unit to the server by the self-service meal selling equipment, and sending the identification code information to the server together with current total weight information of dishes (namely, total weight information of the dishes before the meal taking); after receiving meal taking starting information sent by the self-service meal selling equipment, the server firstly checks whether the identification code information has a bound user account number, and replies a checking result to the corresponding self-service meal selling equipment, the self-service meal selling equipment sends a prompt alarm (please scan the code and then take the dish) if the identification code information does not have the bound account number according to the received reply information, and if the identification code information does not have the bound account number, the self-service meal selling equipment is converted into a dish taking requesting interface (displaying the information of a current dish taking person, the weight of the current dish taking, the price of the current dish taking, the total accumulated consumption amount and the like), and dynamically calculates the amount in real time and refreshes the display along with the change of the weight during dish; and when the self-service meal selling equipment identification code information disappears (the meal taker leaves), sending the weight and the amount information of the taken dishes to the server for keeping accounts, and attributing the keeping accounts to the user account number bound by the identification code information, so that the corresponding user account number can be paid through the payment platform. According to the self-service meal selling system, automatic accounting can be carried out based on the weight information of the dishes taken by the diners, the diners can realize non-inductive payment through the payment platform based on bills, and the convenience of self-service meal selling is improved. Therefore, based on the system, the complete self-help of meal selling can be realized, and related staff is not required to participate from meal taking to account settling of diners, so that the meal selling efficiency is further improved.

(9) In the self-service meal selling method, after the server binds the user account and the identification code information (such as the identification code information on the tray), if the meal taking information of the identification code is not received within a certain time (such as 15 minutes), the server automatically unbinds the identification code after settling accounts and deducting money for the user account, and the operation can avoid the phenomenon that the tray is bound and the tray is forgotten to be unbound, so that other people can be stolen and deducted if the tray is directly used. The identification code can also be unbound on the code-scanned APP by manual operation of real-time checkout.

(10) In the self-service meal selling method, health meal recommendation information can be provided, a user can send body indexes of the user to the server through the user APP, and the server sends corresponding menu information suitable for the user to eat to the user APP based on the body indexes of the user and the health information of the current dishes, so that healthy diet of the user is facilitated; in addition, the server determines the dining habits of the user based on the information of the dishes taken by the user in the past under the account number of the user, recommends menu information to the user based on the dining habits of the user, facilitates the user to select the dishes, and saves the time for the user to select the dishes.

(11) In the self-service meal selling method, the main controller drives the alarm unit to alarm if the main controller detects that the weight of the dishes is reduced under the condition that the identification code information is not scanned by the identification code reading unit of the self-service meal selling equipment, so that the phenomenon that people directly take the dishes without scanning codes is avoided. In addition, after receiving the identification code information sent by the identification code reading unit of the self-service food selling equipment, if the server determines that the identification code information is not bound to the user account, sending an instruction that the current identification code information is not bound to the self-service food selling equipment, and driving an alarm unit to give an alarm by the self-service food selling equipment; the situation that related personnel cannot settle accounts because the related personnel take dishes by using the tray with the identification code information not bound to the user account is avoided.

Drawings

Fig. 1 is a block diagram of the self-service food selling device and the self-service food selling system according to the present invention.

Fig. 2a to 2c are schematic circuit diagrams of the self-service meal vending apparatus according to the invention.

Fig. 3 is a block diagram of another configuration of the self-service food vending system of the present invention.

Fig. 4 is a block diagram of a configuration of the self-service food selling system using the CAN bus according to the present invention.

FIG. 5 is a flow chart of a self-service meal vending method of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Example 1

The embodiment discloses a self-service meal selling device, as shown in fig. 1, including but not limited to a main controller and a weighing sensor, an identification code reading unit, a communication unit, a heating control system, a display screen, a USB interface, a voice prompt and alarm unit, a light alarm unit, an external memory and a power supply device which are connected with the main controller. In this embodiment, the main controller may be a single chip microcomputer, such as STM32F407VGT6 shown in fig. 2 a. Wherein:

in this embodiment, the identification code reading unit is configured to read identification code information. The main controller is connected with the identification code reading unit and is used for acquiring the identification code information read by the identification code reading unit, wherein the identification code information comprises identification code information bound with the user account. The identification code reading unit in the present embodiment may be an identification code scanner and/or a camera, etc. In this embodiment, the connection relationship between the camera and the identification code scanner and the controller is as shown in fig. 2 a.

In this embodiment, the weighing sensor is used for collecting the weight of dishes on the meal selling equipment; in this embodiment, the main controller is connected to the weighing sensor, and is configured to determine the weight of the dishes on the self-service meal selling device according to the information acquired by the weighing sensor, and determine the weight of the dishes to be taken according to the change of the weight information. In this embodiment, as shown in fig. 2b, the load cell may be a full bridge load cell, and is connected to the main controller through an analog-to-digital conversion device. In this embodiment, after obtaining the information of the weighing amount of the dish, the main controller may calculate the corresponding amount of the weighing amount according to the stored name of the dish and the unit price.

In this embodiment, the main controller is connected to the communication unit and communicates with the server through the communication unit, and specifically, the main controller is connected to the communication unit and connected to the server through a network, and then may perform real-time communication related to services with other user terminals (e.g., a mobile phone, a computer, etc.) through the server.

In this embodiment, the communication unit is one or more of a first communication unit, a second communication unit, a third communication unit and a fourth communication unit.

The first communication unit comprises a 4G/5G communication unit, e.g. a CATI-4G module as shown in fig. 2a, connected to the main controller.

The second communication unit comprises a WIFI communication unit, such as the YED-WIFI EMW3080B module shown in fig. 2a, connected to the main controller.

The third communication unit includes a wired ethernet communication unit connected to the main controller, as shown in fig. 2b, the wired ethernet communication unit may include an ethernet physical interface chip LAN8720A, a network isolation coupling transformer HY601680, and an RJ45 network interface, the main controller is connected to the ethernet chip LAN8720A, the ethernet chip LAN8720A is connected to the network isolation coupling transformer HY601680 and then connected to the switch through an RJ45, and may use a non-standard POE to supply power.

The fourth communication unit comprises a CAN transceiver connected with the main controller, and the main controller is connected to the CAN bus through the CAN transceiver. When a plurality of self-service meal selling devices exist in a certain area range, the main controller of each self-service meal selling device CAN be connected to the CAN bus through the CAN transceiver connected with the main controller, and then is connected to the server through the CAN bus protocol converter. Compared with the first communication unit to the third communication unit, in the data transmission process, the Message Queue Telemetry Transmission (MQTT) Message CAN be merged into the IP packet or one IP packet CAN be split into a plurality of MQTT packets through the CAN bus protocol converter, so that the data flow CAN be effectively saved, and the network overhead cost CAN be saved.

In this embodiment, the main controller may select one or more communication units to communicate with the server, and the server is connected to the computer, the user terminal, and the like, where the user terminal may be a user mobile phone, a tablet computer, and the like. The main controller can be in remote communication with the server based on the communication unit, and further can be in communication with the user terminal, so that real-time control instructions of the server and the user terminal and real-time state data of the display device can be received, the touch screen and the display screen on the device can be directly replaced, and the cost of the device is reduced.

In this embodiment, as shown in fig. 2c, the heating control system includes a first switching tube Q1, a second switching tube Q2, a photocoupler, a triac VT1, and a security relay; the photoelectric coupler is a zero-crossing trigger special for the optical coupling silicon controlled rectifier.

In the present embodiment, as shown in fig. 2c, the positive input terminal of the photocoupler is connected to the positive power supply terminal through a resistor R7, the negative input terminal is grounded through a first switch tube Q1, and the input of the first switch tube is connected to the main controller; or, the input positive terminal of the photoelectric coupler is connected with the positive terminal of the power supply through the first switching tube, and the input negative terminal is grounded; the first switch tube is connected to a main controller, and the main controller controls the working state of the photoelectric coupler by controlling the state of the first switch tube Q1. Specifically, when the connection structure of the input end of the photoelectric coupler is as shown in fig. 2c, and when the first switching tube Q1 is an NPN triode, the base of the first switching tube is connected to the IO port of the main controller and is grounded through the resistor R4, the collector of the first switching tube Q1 is connected to the input negative terminal of the photoelectric coupler, the emitter of the first switching tube Q1 is grounded, when the IO port of the main controller connected to the base of the first switching tube Q1 sends a high level signal, the first switching tube Q1 is turned on, the input end of the photoelectric coupler is turned on by the photodiode, and when the ac voltage reaches a certain amplitude after zero crossing, a trigger pulse is sent to turn on the triac VT1 to turn on the heating power supply.

In the present embodiment, as shown in fig. 2c, one end of the relay coil RE1B is connected to the power supply, and the other end is grounded through the second switch tube Q2; or the coil connecting structure of the relay can be as follows: one end of the relay coil RE1B is connected with a power supply through a second switch tube Q2, and the other end is grounded; the second switch tube is connected with the main controller, and the main controller controls the working state of the relay by controlling the state of the second switch tube. In this embodiment, the second switch tube Q2 may be an NPN transistor, as shown in fig. 2c, a base of the second switch tube Q2 is connected to an IO port of the main controller and is grounded through a resistor R5, an emitter of the second switch tube Q2 is grounded, a collector of the second switch tube Q2 is connected to one end of the relay coil RE1B, when the main controller detects a temperature-sensing resistor connected to the external heater, the IO port connected to the base of the second switch tube Q2 is sent out to send out a high-level signal, the second switch tube Q2 is turned on, and at this time, the relay coil is powered on to close the contact to communicate with the external heating device; otherwise, if the temperature sensing resistor is not detected, a high level signal is not sent to disconnect the relay contact, so that the safety of a user is ensured without electric shock. In this embodiment, the relay includes at least two pairs of make and break contact switches.

The output of the photoelectric coupler is connected with a bidirectional thyristor switch, the specific connection structure is as shown in fig. 2c, a first port T1 of the bidirectional thyristor switch is connected with a movable contact of a first pair of contact switches of the relay, a second port T2 is connected to a live wire of an alternating current power supply, which can be a live wire of 220V alternating current mains supply, and a fuse is arranged in the connection circuit; the movable contacts of the second pair of contact switches of the relay are connected to a zero line of an alternating current power supply; or, the connection relationship between the bidirectional thyristor switch and the relay as well as the live wire and the zero line of the commercial power can be as follows: the first port T1 of the triac is connected to the neutral line of the AC power supply, the second port T2 is connected to the moving contacts of the first pair of contact switches of the relay, and the moving contacts of the second pair of contact switches of the relay are connected to the live line of the AC power supply.

In this embodiment, the moving contacts of the first pair of contact switches and the second pair of contact switches of the relay are connected to the heating wires in the dish heating device to energize and heat the dish heating device. In this embodiment, can place on the equipment of selling by oneself and add hot water dish, the water in the hot water dish is controlled the ohmic heating through heating device and is kept warm, and the dish of dress dish is placed on the hot water dish. In the embodiment, the main controller controls the heating temperature by controlling the power on and off at a high speed; the 220V alternating current is a sine wave with positive and negative half cycles, the silicon controlled rectifier can only keep one-way conduction after being triggered, and can be automatically turned off when the current reaches the other half cycle of zero, so that the bidirectional silicon controlled rectifier can be conducted in the half cycle only by triggering in each half cycle; the 50-cycle alternating current has 100 half-cycles in one second, and as long as the PWM (pulse width modulation) period sent by the main controller is more than 1 second, the temperature regulation precision can reach more than 1%.

In this embodiment, the display screen is connected to the main controller, and the main controller can display related information through the display screen, for example, can display information of dishes, information of weight of the dishes taken, alarm information, maintenance setting parameters, and the like, and specific contents to be displayed can be set according to actual requirements; the display screen can also be a touch screen with a touch function, the touch screen is connected with the main controller and can be used as input equipment of the main controller, and man-machine interaction can be realized through the touch screen. In this embodiment, the display screen may be an LCD serial display screen.

In this embodiment, as shown in fig. 2a, the voice prompt and alarm unit includes a voice chip connected to the main controller, such as a MY1680U chip, and the voice chip is connected to a speaker or a sound. The main controller can realize voice prompt and alarm based on the voice prompt and alarm unit, and prompt and alarm contents can be set according to field requirements.

In this embodiment, the light alarm unit includes an LED lamp connected to an IO port of the main controller, the LED lamp is controlled to turn on or off by the main controller, the LED lamp may be used for alarming and the like connected to a 12V power supply, an anode of the LED lamp is connected to a 12V direct current, a cathode of the LED lamp is connected to a collector of the third switching tube Q3, a base of the third switching tube Q3 is connected to the IO port of the main controller and is grounded through a resistor R8, an emitter of the third switching tube Q3 is grounded, and the main controller turns on or off the LED lamp by controlling a conducting state of the Q3.

In this embodiment, the main controller may extend the storage container through an external memory, where the external memory includes memories such as an EEPROM, a RAM, and a FLASH, and a connection relationship between each memory and the main controller is as shown in fig. 2 a.

In the present embodiment, as shown in fig. 2a, the main controller is further connected to a USB interface, and can be connected to a printer or the like through the USB interface to control the printer to print a receipt or the like having the dish information.

In this embodiment, a dish supplementing switch and/or a weighing scale factor adjusting lead sealing switch are further provided.

As shown in fig. 2a, one end of the dish supplementing switch is grounded, the other end of the dish supplementing switch is connected to an IO port of the main controller, and when the dish supplementing switch is pressed down, the main controller receives a low level signal corresponding to the IO port and determines to enter a dish supplementing mode.

In this embodiment, one end of the weighing proportionality coefficient adjusting lead-sealed switch is grounded, and the other end is connected to an IO port of the main controller, as shown in a con13 interface in fig. 2a, the weighing proportionality coefficient adjusting lead-sealed switch is connected, when two pins of the con13 interface are short-circuited, the main controller receives a low level signal corresponding to the IO port, and when the main controller is powered on, the main controller automatically enters a maintenance mode; and when con13 is not short-circuited, the application operation mode is directly entered, and the maintenance mode can be entered only through password operation in the application operation mode. Only in the maintenance mode, can change the weighing proportionality coefficient again, realize the school balance, but need keep weighing proportionality coefficient newly changed and still detect con13 interface two stitch short circuit states when keeping, only can update the saving by the short circuit. In this embodiment, when the display screen is a touch screen, the display screen can be touched to display an interface for inputting a password, and the maintenance mode is entered when the password is correctly input. In this embodiment, the lead sealing switch for adjusting the weighing proportionality coefficient is arranged inside the shell of the self-service meal selling equipment, and after the newly changed weighing proportionality coefficient is stored in the calibration scale, the lead sealing switch needs to be disconnected before the shell of the self-service meal selling equipment is mounted for lead sealing.

In this embodiment, the power supply device includes an AC/DC switching power supply module and a lithium battery pack, an output terminal of the switching power supply module is connected in parallel with the lithium battery and serves as a power supply output terminal of the power supply device, and an input terminal of the switching power supply module is connected to commercial power; a switch is arranged on a power supply output circuit connected with the output end of the power supply device, and as shown in fig. 2c, the power supply state of the self-service meal selling equipment is controlled through the switch, including the power supply of all electric devices in the self-service meal selling equipment; the power output end of the power supply device is connected with the voltage reduction device, and the voltage after voltage reduction is obtained through the voltage reduction device. In this embodiment, as shown in fig. 2b, the 12V dc power is respectively passed through two buck switching power chips to obtain 3.3V dc power and 5V dc power for the devices in the equipment with power requirements. The lithium battery pack in the embodiment adopts a 12.6V lithium battery pack, and can be charged through an AC/DC switching power supply module connected with commercial power.

Example 2

The embodiment discloses a self-service meal selling system, as shown in fig. 1, comprising a server and the self-service meal selling device described in embodiment 1; the main controller in the self-service meal selling equipment communicates with the server through the communication unit. Wherein:

sell meal equipment by oneself:

and the server is used for sending the identification code information read by the identification code reading unit.

The server is used for sending the weight of the dish and the calculated amount information to the server and displaying the weight of the dish and the calculated amount information locally or sending the weight of the dish only.

The server:

the method is used for prompting a user to register an account number (pre-recharging by using an authorized password-free payment of a third party payment platform or an automatically allocated account number of a system) through an application program when a user terminal scans a two-dimensional code (a second identification code) on a tray for the first time.

The system comprises a user account and a server, wherein the user account is used for receiving identification code information and binding the identification code information to a corresponding user account; in this embodiment, the server may receive the identification code information sent by the user account that has been registered by the user terminal, and bind the user account with the identification code information sent by the user account. The user terminal can be a mobile phone of a user, and the user account can be a recharging account automatically allocated by a system when the user registers, and can also be an account in a third-party application program such as a payment treasure or a WeChat. And the user opens the third-party application program and logs in the account number of the third-party application program, then the code scanning function is opened through the third-party application program, and the scanned identification code information is sent to the server.

And the self-service meal selling equipment is used for determining the user account bound by the received identification code information after receiving the identification code information sent by the self-service meal selling equipment.

The self-service meal selling equipment is used for carrying out bookkeeping according to the taken weight and calculated amount information of the dishes sent by the self-service meal selling equipment, and attributing bookkeeping information to the user account bound with the identification code information, so that the corresponding user account can be paid through a payment platform (corresponding to a system charging account number or a Paibao, a WeChat and the like). If the display screen is cancelled on the self-service meal selling equipment and the self-service meal selling equipment is replaced by the user terminal APP which is remotely networked, the weight information of the dishes which are only sent by the self-service meal selling equipment is taken, the server is responsible for calculating the amount information for accounting, the server sends the calculated amount information to the user terminal, the amount information of the dishes which are taken by the user is displayed through the user terminal APP, and the structure of the self-service meal selling system is shown in fig. 3. In this embodiment, the server can receive payment information sent by the payment platform, and determine whether the user has completed payment, wherein after it is determined that the user has completed taking dishes, a unified payment is performed through the payment platform, and the settlement is completed. The accounting information comprises the name of the dish, the unit price of the dish, the weight of the dish, the time and other information.

The server in this embodiment may be a cloud server or a local server, that is, may be in a cloud platform configuration or local configuration mode, and may provide various service functions such as network service flow control, accounting, and deduction, including automatic firmware update management.

In this embodiment, the self-service food selling system further comprises a tray for placing dishes, and the tray is provided with a first identification code for reading by an identification code reading unit of the self-service food selling device and a second identification code for scanning by the user terminal; the second identification code stores the server domain name and the identification code information in the first identification code; after scanning the second identification code, the user terminal accesses the server corresponding to the domain name, and sends the identification code information in the first identification code read by the user terminal from the second identification code to the server corresponding to the domain name through the user account, so that the server can bind the identification code information in the first identification code of the tray to the corresponding user account; in this embodiment, the first identifier is not valid until the server registers the first identifier in advance with a specific restaurant (bound restaurant ID). The first identification code can be a bar code or a two-dimensional code, and is preferably a bar code; the second identification code is preferably a two-dimensional code, so that more information can be conveniently stored, including the domain name of the server, the identification code information of the first identification code and the like. In this embodiment, when first identification code and second identification code are the two-dimensional code, also can set up to the same two-dimensional code, based on this, can only set up a two-dimensional code at the tray, supply the identification code reading unit of self-service meal selling equipment promptly, also supply user terminal to sweep the sign indicating number. But for the user sweep the sign indicating number directly perceived convenient, the two-dimensional code should not be printed in the tray side, and the installation of identification code reading unit can not move forward the user and sweep the positive two-dimensional code of sign indicating number directly perceived convenient unsettled installation scanning tray, and identification code reading unit also need not read domain name information (the character is more), cost and practical factor are considered, in this embodiment, do not save domain name information in the first identification code, therefore the two-dimensional code that sets up and second identification code correspond is different, the optimal setting is, first identification code is the bar code, the identification code reading unit that sets up the position on the tray and conveniently sell dining equipment by oneself sweeps the sign indicating number and reads, the second identification code is the two-dimensional code, the position that sets up on the tray makes things convenient for user terminal to sweep the sign indicating.

In this embodiment, the identification code that needs to be bound to the user account and read by the identification code reading unit of the self-service food selling device may also be a fixed identification code assigned to the user; the identification code can be an identification code arranged in a private meal box of a user, is registered by a server and is permanently bound to a user account, and when the user needs to take dishes, the meal box can be placed in a code scanning range of an identification code reading unit of the self-service meal selling equipment; the identification code may be a two-dimensional code or a bar code, etc.

In the implementation, the number of the self-service meal selling devices in the self-service meal selling system can be one or more; when the number of the self-service meal selling equipment is multiple and the number of the self-service meal selling equipment is more, the self-service meal selling equipment CAN be communicated with the server through the fourth communication unit, specifically, a main controller of each self-service meal selling equipment is connected to a CAN bus through a CAN transceiver, the CAN bus is connected with a CAN protocol converter, and the CAN protocol converter is in communication connection with the server through a 4G/5G communication network, a WIFI communication network or a wired Ethernet, as shown in fig. 4.

Example 3

The embodiment discloses a self-service food selling method implemented based on the self-service food selling system described in embodiment 2, and as shown in fig. 5, the method specifically includes the following steps:

s1, when the server receives the two-dimension code (second identification code) on the tray scanned by the user terminal for the first time, the user is prompted to register the payment account number by downloading the application program or paying attention to the public number (the authorized secret-free payment of a third party payment platform or the pre-recharging is carried out by using the automatic allocation account number of the system), and the identification code can be bound after the registration is successful.

And S2, the server receives the identification code information sent by the registered user account, and binds the identification code information to the corresponding user account. In this embodiment, the server may receive the identifier information sent by the user account of the user terminal, and bind the user account with the identifier information sent by the user account.

In this embodiment, the user terminal may be a mobile phone of a user, and the user account may be a recharge account automatically allocated by a system when the user registers, or an account in a third-party application program such as a payer or a WeChat of the user; the user can open the application program and log in the user account, then the code scanning function is opened through the application program, the application program automatically sends the user account and the identification code information obtained by scanning the code to the server after scanning the code, the server firstly checks whether the user account is registered in the system after receiving the identification code information sent by the corresponding user account, and if so, the identification code information and the user account are immediately bound; and if the user account is not registered through checking, replying a registration operation interface to prompt the user to perform registration operation, and after the registration is successful, scanning the identification code again to perform binding.

In this embodiment, the identification code may be set on the tray, when the identification code set on the tray is as shown in embodiment 2, that is, the identification code includes the first identification code and the second identification code, the user takes one tray each time he has a meal, after scanning the second identification code through the user application program, the corresponding user account sends the identification code information of the first identification code stored in the second identification code to the server corresponding to the domain name stored in the second identification code, and the server binds the user account and the identification code information sent by the user account. Certainly, the identification code may also be a fixed identification code registered for the user, the fixed identification code may be set on the private tableware of the user and only needs to be bound with the corresponding user account once, in this case, the server may set the identification code information corresponding to the identification code to be bound with the user account, or the user may automatically bind through scanning the identification code (such as a two-dimensional code) in the later stage.

S3, the identification code reading unit of the self-service meal selling equipment reads the identification code information and sends the information to the main controller, the main controller sends the information to the server through the communication unit, the server inquires whether the identification code is bound with the user account and replies to the main controller, and the main controller replies according to a reply result: and if the display screen is not bound, the binding is prompted, and the display screen is controlled to enter a prompt binding interface.

In this embodiment, when the identification code is set on the tray as shown in embodiment 2, the identification code reading unit of the self-service food selling device reads the first identification code on the tray to obtain the corresponding identification code information.

After entering a dish selling mode, the weighing sensor of the self-service meal selling equipment collects the weight of dishes on the self-service meal selling equipment, collected information is sent to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and the weight of the dishes is determined according to the change of the weight information.

S4, calculating the corresponding amount of money of the weight according to the stored name and unit price of the dish by the main controller, refreshing the display screen in real time to display so as to prompt the user, determining that the dish taking is finished when the user finishes the dish taking and takes away the tray, subtracting the residual weight after the tray is taken away from the weight when the user starts the dish taking in the dish selling mode at the moment, calculating the weight of the dish taking at the time, calculating the amount information of the amount of the dish taking by using the weight, and sending the information to the server through the communication unit. If the display screen is cancelled on the self-service meal selling equipment, the main controller only sends the weight information of the dishes to the server, and the server calculates the corresponding amount of the weight according to the stored names of the dishes and the unit price; and the server sends the calculated amount information to the user terminal, and the weight and amount information of the dishes taken by the user are displayed through the user terminal APP.

In this embodiment, when the identification code reading unit of the self-service meal selling device changes from being capable of reading the identification code to being incapable of reading the identification code, it is determined that the user has taken the tray after taking the dish, and at this time, the obtained identification code information, the weight of the dish taken and the amount of money are sent to the server through the communication unit.

S5, after receiving the identification code information and the picked weight and amount information of the dishes sent by the self-service meal selling equipment, the server determines the user account bound by the received identification code information, accounts the dishes according to the picked weight and amount information of the dishes and the price of the dishes, and belongs the accounting information to the user account bound by the identification code information, so that the corresponding user account can pay and settle accounts through a payment platform of the user terminal based on the accounting information.

In this embodiment, the method further includes the following steps:

after the server binds the user account with the identification code information, if the information of dish fetching and accounting of the corresponding user account is not received within a certain time period T1, the server automatically checks out the account of the user and unbinds the bound identification code. The time period T1 may be set according to actual conditions and requirements, and may be set to 10 minutes, 15 minutes, etc.

And after receiving the information that the user selects the unbinding operation through the application program, the server pays and accounts settlement for the user account and unbinds the corresponding identification code.

After the server binds the user account and the identification code information, if the accounting information of the corresponding user account is not generated after a certain time, the server unbinds the corresponding user account and the bound identification code information. The specific time can be flexibly set according to actual conditions and requirements.

In this embodiment, the method further includes a step of recommending a healthy meal, which is specifically as follows:

the server acquires user body indexes sent by the user account, and sends corresponding menu information suitable for being eaten by the user to the user account based on the user body indexes and the current dish information, so that healthy diet of the user is facilitated; in this embodiment, the physical indicators of the user include age, height, weight, blood pressure, blood sugar, and the like; the method comprises the steps that a user generates body indexes of the user into a server through a user account based on a user terminal, the server determines that the corresponding user account needs to order and pick up dishes after receiving identification code information sent by the user account, and the server sends corresponding menu information suitable for the user to eat to the user account based on the body indexes of the user and current dish information, so that healthy diet of the user is facilitated;

the server determines the dining habits of the user based on the information of the dishes taken by the user in the past under the account number of the user, and recommends menu information to the user based on the dining habits of the user. In addition, the server can also collect hot dishes within a certain time range and recommend the hot dishes to the user.

The method further comprises a step of supplementing the vegetables, and the supplementing can be performed in one of the following ways:

and the third is that: the self-service meal selling equipment enters a dish supplementing mode under the switching of a dish supplementing switch and under the condition that the identification code reading unit reads identification code information for supplementing dishes; in the dish supplementing mode, the weighing sensor collects weight information of dishes on the self-service meal selling equipment and sends the collected information to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and determines the supplemented weight of the dishes and the weight of the dishes after the dishes are supplemented according to the change of the weight information; and after the dish supplementing is finished, the dish supplementing mode is quitted by operating the dish supplementing switch and/or reading the identification code information for supplementing the dishes.

And fourthly: the self-service meal selling equipment enters or supplements a dish mode after receiving a dish supplementing instruction transmitted by a remote user terminal APP and forwarded by a server. In the dish supplementing mode, the weighing sensor collects weight information of dishes on the self-service meal selling equipment and sends the collected information to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and determines the supplemented weight of the dishes and the weight of the dishes after the dishes are supplemented according to the change of the weight information; after the dish supplement is finished, sending a dish supplement quitting instruction forwarded by the server to the self-service meal selling equipment through the remote user terminal APP, and quitting the dish supplement mode;

after the dish supplementing is finished, the self-service meal selling equipment main controller calculates the weight of the taken dish based on the weight of the dish after the dish supplementing, and the phenomenon that the weight of the taken dish is detected to make mistakes is avoided. In this embodiment, sell meal equipment's main control unit by oneself can sell the weight information of food on the meal equipment regularly and convey to the server for the weight of food on the meal equipment by oneself is sold to the server, and when food weight was less than a definite value, can send information to relevant staff's terminal, perhaps reminds relevant staff through other modes, with the warning mends dish.

The self-service meal selling method further comprises the following alarming steps:

under the condition that the identification code information is not scanned by an identification code reading unit of the self-service meal selling equipment, if the main controller detects that the weight of the dishes is suddenly reduced, the main controller drives to alarm; the sudden weight reduction means that the stable weight reduction in unit time exceeds a set tolerance threshold, and the gradual and slow weight reduction caused by the evaporation of heat preservation and heating water and the back and forth increase and decrease caused by the back and forth shaking of wind blowing are not considered to be suddenly reduced, and the filtering is carried out by applying a software technology.

After receiving the identification code information sent by the identification code reading unit of the self-service food selling equipment, if the server determines that the identification code information is not bound to the user account, sending an instruction that the current identification code information is not bound to the self-service food selling equipment, and driving and alarming by the self-service food selling equipment;

under the non-dish supplementing mode, the main controller can automatically update the weight if detecting that the weight of dishes is increased, under the condition, the alarm is not required, but the alarm can be driven, and the alarm is specifically set according to actual requirements.

The self-service meal selling method further comprises the step of adjusting the weighing proportionality coefficient:

adjusting a lead sealing switch to enter a maintenance mode through a weighing proportionality coefficient: specifically, the main controller of the self-service meal selling equipment detects that the weighing proportionality coefficient is adjusted to close a lead seal switch when the main controller is powered on, or a password input by a user through input equipment such as a touch screen in an application working mode is input, and the main controller enters a maintenance mode after the password is judged to be correct.

In the maintenance mode, all articles on the scale are emptied, then a zero clearing button (such as a zero clearing button arranged on a touch screen) is clicked to clear the scale (align to zero point), and when the main controller receives a weight zero clearing instruction sent by input equipment connected with the main controller or other terminals communicated with the main controller, the current acquisition value of the weighing sensor is stored into a variable b; then put the weight of fixed weight t on weighing sensor, click the button of setting a weight after inputting weight F, calculate weighing scale coefficient a by the software on the main control unit, the main control unit obtains the collection value x after weighing sensor puts the french code, divide the weight as the minute mother after subtracting collection value b with collection value x, obtain weighing scale coefficient a: and a is F/(x-b). In this embodiment, after the weighing proportionality coefficient a is adjusted, the weighing proportionality coefficient adjustment lead-sealed switch should be able to store the weighing proportionality coefficient a in a short-circuit state, and not store the weighing proportionality coefficient a in an open-circuit state.

Because the displayed weight unit is not the acquired value converted by the AD chip acquiring the output voltage of the weighing sensor bridge, the current acquired value needs to be converted into the weight of the current called article according to the following formula: a (x-b); y represents the weight of the current article, x represents the AD acquisition value after the current article is placed, b represents the AD acquisition value before the current article is placed, and a represents the weighing proportionality coefficient. The scale can be calibrated by clicking the set weight button to calculate a as y/(x-b), and the value of a can be calculated using the weight standard weight as the reference weight.

In this embodiment, the dishes mentioned above also include other foods such as rice, steamed bread, fruits, and beverages, and are not just dishes in the conventional meaning.

Those skilled in the art will appreciate that all or part of the steps in the method implementing the embodiment may be implemented by executing program instructions to drive relevant hardware, and the corresponding program may be stored in a computer-readable storage medium. It should be noted that although the method operations of example 1 are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Rather, the depicted steps may change the order of execution, and some steps may be executed concurrently. Additionally or alternatively, the model step may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. A self-service meal selling device is characterized by comprising a main controller, a weighing sensor, an identification code reading unit and a communication unit;

the main controller is connected with the communication unit, the communication unit is connected to the server through a network to realize service function communication, and service associated communication is realized with other terminals through the server.

2. The self-service meal selling device according to claim 1, wherein the communication unit is one or more of a first communication unit, a second communication unit, a third communication unit and a fourth communication unit which are in internet communication;

3. The self-service food vending apparatus of claim 1, further comprising a heating control system; the heating control system comprises a first switch tube, a second switch tube, a photoelectric coupler, a bidirectional thyristor switch and a relay; the photoelectric coupler is an optical coupling silicon controlled rectifier;

one end of the relay coil is connected with a power supply, and the other end of the relay coil is grounded through a second switch tube; or one end of the relay coil is connected with the power supply through the second switching tube, and the other end of the relay coil is grounded; the second switching tube is connected with the main controller, and the main controller controls the working state of the relay by controlling the state of the second switching tube; the relay comprises at least two pairs of dynamic contact switches;

the first port T1 of the bidirectional thyristor switch is connected with the moving contact of the first pair of contact switches of the relay, and the second port T2 is connected to the live wire of the alternating current power supply; the movable contacts of the second pair of contact switches of the relay are connected to the zero line of the alternating current power supply; or the first port T1 of the bidirectional thyristor switch is connected to the zero line of the alternating current power supply, the second port T2 of the bidirectional thyristor switch is connected to the movable contact of the first pair of contact switches of the relay, and the movable contact of the second pair of contact switches of the relay is connected to the live wire of the alternating current power supply; the movable contact points of the first pair of contact point switches and the second pair of contact point switches of the relay are connected to the dish heating device and used for heating the dish heating device in an electrified mode.

4. The self-service food selling device according to claim 1, further comprising a dish supplementing switch and/or a weighing scale factor adjusting lead sealing switch connected with the main controller; the main controller is controlled to enter a dish supplementing mode through the dish supplementing switch, and the lead sealing switch is adjusted through the weighing proportionality coefficient to control the main controller to enter a maintenance mode and allow the changed weighing proportionality coefficient to be stored.

5. The self-service food vending apparatus of claim 1, further comprising one or more of the following components connected to the main controller: the device comprises a display screen, a USB interface, a voice prompt and alarm unit, a light alarm unit and an external memory;

the self-service meal selling equipment also comprises a power supply device for supplying power; the power supply device comprises an AC/DC switching power supply module and a lithium battery pack, wherein the output end of the switching power supply module is connected with the lithium battery pack in parallel and is used as the power supply output end of the power supply device, and the input end of the switching power supply module is connected with commercial power; a switch is arranged on a power supply output line connected with the output end of the power supply device, and the power supply state of the self-service meal selling equipment is controlled through the switch; the power output end of the power supply device is connected with the voltage reduction device, and the working voltage required by the electronic circuit after voltage reduction is obtained through the voltage reduction device.

6. A self-service meal selling system, which is characterized by comprising a server and the self-service meal selling equipment as claimed in any one of claims 1 to 5; the main controller in the self-service meal selling equipment is communicated with the server through a communication unit;

the self-service meal selling equipment comprises:

the server:

the system comprises a user terminal, a user account number registration module and a user interface module, wherein the user account number registration module is used for prompting a user to register a user account number when the identification code information sent by the user terminal is received for the first time, and binding the identification code information with the user account number after the registration is successful; the system comprises a user account and a server, wherein the user account is used for receiving identification code information and binding the identification code information to a corresponding user account;

7. The self-service food selling system according to claim 6, further comprising a tray, wherein a first identification code for reading by an identification code reading unit of the self-service food selling device and a second identification code for scanning by the user terminal are arranged on the tray; the second identification code stores the server domain name and the identification code information in the first identification code; after scanning the second identification code, the user terminal accesses a server corresponding to the domain name, and sends identification code information in the first identification code read by the user terminal from the second identification code to the server corresponding to the domain name through a user account, so that the server binds the identification code information in the first identification code of the tray to the corresponding user account;

one or more self-service meal selling devices are provided;

8. A self-service meal selling method realized based on the self-service meal selling system of claim 6 or 7, characterized by comprising the following steps:

the method comprises the steps that when a server receives identification code information sent by a user terminal for the first time, the server prompts a user to register a user account, and after the registration is successful, the identification code information and the user account are bound; the server receives the identification code information and binds the identification code information to the corresponding user account;

after entering a dish selling mode, a weighing sensor of the self-service dish selling equipment collects the weight of dishes on the self-service dish selling equipment, the collected information is sent to a main controller, the main controller determines the weight of the dishes on the self-service dish selling equipment, and the weight of the dishes is determined according to the change of weight information;

after the meal taking is finished, the main controller subtracts the weight when the meal taking is started in the meal selling mode from the rest weight when the meal taking is finished, calculates the weight of the current meal taking, calculates the corresponding amount information of the dishes taken by the diner by using the weight, and sends the corresponding amount information to the server through the communication unit; or after the meal taking is finished, the main controller subtracts the weight when the meal taking is started in the meal selling mode from the rest weight when the meal taking is finished, calculates the weight of the current meal taking, sends the weight of the current meal taking to the server, and calculates the corresponding amount of money of the meal taken by the diner by the server;

the server receives the identification code information and the weight of the picked dishes sent by the self-service meal selling equipment, performs accounting according to the weight of the picked dishes and the corresponding amount information, and belongs the accounting information to the user account bound by the identification code information, so that the corresponding user account performs payment and settlement through the payment platform based on the accounting information.

9. The self-service meal selling method according to claim 8, wherein the identification code information received by the server comprises registered identification code information sent by a registered user account, and the server binds the user account with the identification code information sent by the server;

when the self-service meal selling equipment comprises a display screen, after entering a meal selling mode, a main controller of the self-service meal selling equipment calculates the weight of the obtained dishes in real time, calculates the corresponding amount of the weight according to the stored names and unit prices of the dishes, and displays and informs a meal taker in real time through the display screen;

when the self-service meal selling equipment is not provided with a display screen, after entering a meal selling mode, the server receives weight information of dishes sent by the main controller, calculates corresponding amount of the weight of the dishes to be taken on the self-service meal selling equipment according to the name and the unit price of the dishes stored in the server, and sends the amount to a user terminal corresponding to a user account bound by the identification code in real time for display;

the self-service meal selling method further comprises the following steps:

the self-service meal selling method further comprises the following steps: after receiving a unbinding request for a specified identification code sent by a user application program, the server performs account settlement and money deduction and unbinding on the specified identification code bound in the corresponding user account;

the self-service meal selling method further comprises the following steps: the dining recommendation is as follows:

the server acquires user body indexes sent by a user account, and sends corresponding menu information suitable for being eaten by a user to the user account based on the user body indexes and current dish information;

10. The self-service meal selling method according to claim 8, further comprising supplementing the meal in one of the following ways, specifically:

and the second method comprises the following steps: the self-service meal selling equipment also sends the identification code information to the server after the identification code reading unit reads the identification code information for dish supplement, and enters a dish supplement mode when the identification code information replied by the server is the dish supplement identification code; in the dish supplementing mode, the weighing sensor collects weight information of dishes on the self-service meal selling equipment and sends the collected information to the main controller, the main controller determines the weight of the dishes on the self-service meal selling equipment according to the information collected by the weighing sensor, and determines the supplemented weight of the dishes and the weight of the dishes after the dishes are supplemented according to the change of the weight information; after the dish supplementing is finished, the dish supplementing mode is quitted by reading the identification code information for supplementing the dish again;

the self-service meal selling method further comprises the following steps:

under the condition that the identification code information is not scanned by an identification code reading unit of the self-service meal selling equipment, if the main controller detects that the weight of the dishes is suddenly reduced, the main controller drives to alarm; the sudden weight reduction means that the stable weight reduction in unit time exceeds a set tolerance threshold;

the self-service meal selling method further comprises the following steps:

when entering a maintenance mode and using a maintenance interface to calibrate the scale, firstly clicking a zero clearing button, when a main controller receives a weight zero clearing instruction sent by an input device connected with the main controller or other terminals communicated with the main controller, saving a current acquisition value of a weighing sensor into a variable b to update the variable b, thereby clearing the weight, then putting a weight with a specified weight on the weighing sensor, then clicking a weight setting button after inputting the weight of the weight, and when receiving the reset instruction, the main controller acquires an acquisition value x obtained by putting a legal code on the weighing sensor, and divides the weight of the weight by taking the acquisition value x minus the acquisition value b as a denominator to obtain a weighing proportionality coefficient a.