The purpose of this utility model is that a kind of refrigerator food management system is set, and makes the refrigerator user that different storage periods can be set the numerous food of preserving in the refrigerator.This system can provide inquiry stored information function to the user, shows the stored information function in real time, and when period of storage expires, in time sends warning message and remind the user.This system also has clock and calendar function, and the conversion of memory function and time function.
The purpose of this utility model realizes by following scheme:
The utility model food management system is made up of power supply, single-chip microcomputer, driver module, display module and control button, its feature is being that its power unit is by the mu balanced circuit of being made up of regulator block and electric capacity, with single-chip microcomputer, driver module, circuit such as display module link to each other, and provide constant voltage dc source to it; Single-chip microcomputer links to each other with a plurality of buttons, and button is detected in real time, and the control of its internal processes is finished from processing, the selection of the data message of button and produce data-signal; Driver module links to each other with single-chip microcomputer, will be from the data transaction rear drive display module of single-chip microcomputer: display module be made up of charactron and liquid crystal piece, the negative pole of this module links to each other with driver module, and positive pole links to each other with single-chip microcomputer by triode, shows various data and time; Button links to each other with single-chip microcomputer, finishes the input of various data, function conversion, clock function is set etc.
The utility model food management system utilizes single-chip microcomputer to do master chip, show food storage state and time, warning message and calendar and clock by liquid crystal or charactron, this system works is reliable, push-botton operation is convenient, for the user provides a convenient and reliable effective system that refrigerator food is managed.
Utilize drawings and Examples that the utility model food management system is elaborated below:
Fig. 1 is the utility model food management system block diagram;
Fig. 2 is the control panel of the utility model food management system;
Fig. 3 is the utility model food management system circuitry figure.
Wherein:
1 power supply, 2 single-chip microcomputers
3 driver modules, 4 display modules
5 buttons, 6 sequence numbers show
7 sequence number selector buttons 8 hours or storage fate show
9 are provided with button 10 minutes or demonstration memory time
11 clocks/memory time switching button 12 clock status indicator lamps
13 status indicator lamps memory time adjusting in 14 hours (calibration) button
Regulated (calibration) button in 15 minutes
With reference to Fig. 1, from the utility model food management system block diagram as can be seen native system comprise: power supply 1, single-chip microcomputer 2, driver module 3, display module 4 and button 5, power supply 1 will become direct current from the 220V isolated buck rectification of civil power, become the multipath voltage regulation dc source through rectifying and voltage-stabilizing again, offer late-class circuits such as single-chip microcomputer 2, display module 4 and driver module 3.The user passes through button 5, for different food provides the storage sequence number, and the different memory times of input varieties of food items etc.2 pairs of buttons 5 of single-chip microcomputer detect in real time, and calculate and handle from button 5 information above-mentioned, form digital information and offer driver module.Driver module 3 carries out data transaction, drives display module 4.Display module 4 utilizes charactron or liquid crystal piece to show the food sequence number to the user, and memory time, information such as warning are finished whole food control program.
The control of the function of whole system is finished by single-chip microcomputer, and single-chip microcomputer detects in real time to button, provides data message to driver module, finish to video data selection function.Simultaneously cell voltage is monitored and dc source and battery are automaticallyed switch according to the needs of the situation of power supply, and the control of status indicator lamp etc.
Display module is made of charactron or liquid crystal piece, finishes functions such as the demonstration of clock and calendar, memory alarm indication.
Fig. 2 is a control panel, has function and clock demonstration and calibration function are set food sequence number and memory time.Under normal condition, system is in the time showing state, and at this moment, charactron 8 shows hourages, and charactron 10 shows minute.When charactron shows other state, can get back to the time showing state by switching button 11.Under the clock show state, button 14 and button 15 are calibrated hourage and the number of minutes respectively. Indicator lamp 12 and 13 time state indicator lamps and store status indicator lamp, the conversion of expression two states.
Under the clock show state, just enter memory function setting and serial number information show state by switching button 11.At this moment, charactron 6 shows the sequence number of storage food, and button 7 be the sequence number setting and select button, and button 9 is set cooperates, for each storage food is provided with a sequence number, is convenient to be provided with respectively the sequence number of memory time and selection different food products.Charactron 8 and charactron 10 show food storage fate and time respectively.After food is put into, select button by sequence number, give sequence number of this food, charactron 6 shows these sequence numbers, again by button is set, can be with the food sequence number and initially the time of putting into is kept at the mnemonic of single-chip microcomputer.
Fig. 3 is the embodiment of the utility model food management system circuitry, V
1For model is 7805 regulator block, with capacitor C
1And C
2Constitute mu balanced circuit, after this mu balanced circuit voltage stabilizing, export the D.C. regulated power supply of multichannel+5V through the dc source of power input J1-3 and J1-5 input.Relay K
1Form battery control circuit, according to the monitoring situation of single-chip microcomputer to power supply, control relay K
1Action.When the dc source through exchanging conversion just often, Single-chip Controlling change-over switch K
13 pin and the 6 pin state that is in disconnection, at this moment, system by mu balanced circuit provide+5V stablizes DC voltage; When D.C. regulated power supply disconnects or voltage when low the Single-chip Controlling K switch
13 pin and 6 pin connect, the working power of circuitry+5V is provided by the battery that is provided with in the power supply.The voltage of single-chip microcomputer monitoring battery, when cell voltage was low, charactron 10 showed " L0 ", prompting needs to change the battery in the power supply.
Button PB1 is a sequence number selector button 7, and PB2 is for being provided with button 9, and PB3 is a switching button 11, and PB4 is hour adjusting (calibration) button 14, and PB5 is minute adjusting (calibration) button 15.Single-chip microcomputer U
1Button is detected in real time L
1And L
2Be respectively clock status indicator lamp 12 and memory time status indicator lamp 13, indication circuit is in two function conversion states respectively.
Driver module U2, (model is MC1413BD), its function is the data-signal conversion rear drive charactron that will transmit from single-chip microcomputer U1, and five panels that display module is made up of charactron are formed, and the charactron model can be ELS-432GWA.Wherein, the DL in the circuit diagram
1Be the sequence number display surface 6 among Fig. 2, DL
2For hour or storage fate display floater 8, DL
3For minute or memory time display floater 10.Integrated package U
3(model is PCF8563) and crystal oscillator X
2Form clock, calendar circuit.
Single-chip microcomputer U
1(MC68HC908) be the control core of entire circuit.Wherein pin one is vacant; Pin 3 ground connection; Pin 7 connects+the 5V power supply; Pin two 8 is for being to reply the position by cable; Pin two, 8,9,23 connects button PB respectively
1~PB
5Button is detected in real time; Pin two 7,10 meets indicator lamp L respectively
1And L
2, control indicator lamp represent clock status and memory time state; Pin one 6 links to each other with battery, cell voltage detected, and when voltage is low, MCU driving DL
3, show that " L0 " expression cell voltage is low excessively, the information that battery must be changed; Pin two 5,26 and U
3Link to each other, read calendar, clock information, for system provides time reference; The 1-8 pin of pin one 1,12,15,17,18,20,21 and data driver U2 links to each other, and the input data signal that will produce according to the action of button exports data driver U to
2, through U
2After the conversion, the driving LED charactron shows corresponding information; Pin one 3,14,19,24,22, pull through triode BC807 and 3 faces and join pin 4,5 and crystal oscillator clock X respectively
1Link to each other, for single-chip microcomputer provides pulse reference.