CN2743807Y - Barcode information managing printing electronic scale - Google Patents
Barcode information managing printing electronic scale Download PDFInfo
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- CN2743807Y CN2743807Y CN 200420107488 CN200420107488U CN2743807Y CN 2743807 Y CN2743807 Y CN 2743807Y CN 200420107488 CN200420107488 CN 200420107488 CN 200420107488 U CN200420107488 U CN 200420107488U CN 2743807 Y CN2743807 Y CN 2743807Y
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- microcontroller
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- weighing sensor
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Abstract
The utility model discloses a barcode information managing printing electronic scale, comprising a weighing sensor, an analogue-to-digital converter connected with the weighing sensor, an information handling unit, a printer, a keyboard and information cue equipment, wherein, the information handling unit comprises a flash memory chip switched into the bus, a non volatile memory cell chip switched into the bus, a clock chip switched into the bus, and a microcontroller switched into the bus. The information handling unit creates transaction information according to the weighing signal, merchandise information and real-time clock, and sends the transaction information to the non volatile memory cell chip through the bus. The the information handling unit also comprises an IO interface switched into the bus, which is connected with the keyboard and the information cue equipment, an address decoder connected with the microcontroller, the flash memory chip, the non volatile memory cell chip, and the clock chip and, a communication interface between the microcontroller and the printer. The address decoder creates chip select control signal under the control of the microcontroller. The electronic scale has the advantages of low failure rate, and complete functions, which can satisfy the market demand and flexible and easy operation, greatly decreasing the manufacture cost of the product.
Description
Technical field
The utility model relates to weighing weighing apparatus, particularly a kind of printing bar code electronic scales, and it can carry out weighing and Print Label and pass through software set label printing format and content.
Background technology
Along with the development in city, various retail trade enterprise such as supermarket, hypermarket and convenience store is flourish, and therefore the demand for the electronic barcode scale also grows with each passing day.But there is following shortcoming in present electronic barcode electronic scales: function is fairly simple, and in large supermarket and hypermarket, range of goods is various, and price and kind alter a great deal, but existing electronic barcode scale is difficult to satisfy the request for utilization of this respect; Performance is not fully up to expectations; Hold at high price.
Summary of the invention
The purpose of this utility model provides a kind of bar code information managing printing electronic scales, and it has, and management function is strong, dependable performance and the low advantage of cost.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
A kind of bar code information managing printing electronic scales comprises weighing sensor, the analog to digital converter that links to each other with weighing sensor, information process unit, printer, keyboard and information indicating equipment, and described information process unit comprises:
Insert the flash chip of bus, it stores merchandise news;
Insert the Nonvolatile memory chip of described bus;
Insert the clock chip of described bus, it provides real-time clock by described data bus;
Insert the microcontroller of described bus, it links to each other with described analog to digital converter, generates Transaction Information and delivers to described Nonvolatile memory chip through described bus according to weighing signal, merchandise news and real-time clock;
Insert the IO interface of described bus, it links to each other with information indicating equipment with described keyboard, so that the keyboard input instruction is delivered to described microcontroller through described bus, receives Transaction Information and delivers to described information indicating equipment from described microcontroller through described bus;
With the address decoder that described microcontroller, flash chip, Nonvolatile memory chip, clock chip and IO interface link to each other, it produces sheet selected control system signal under the control of described microcontroller;
Be connected the communication interface between described microcontroller and the printer.
Reasonable is that in above-mentioned bar code information managing printing electronic scales, described analog to digital converter comprises:
Integrating circuit, its in Fixed Time Interval, receive described weighing sensor output voltage charging and etc. slope discharge be converted to time of corresponding proportion with output voltage with described weighing sensor;
Zero-crossing discriminator, two input end link to each other with reference voltage with described integrating circuit respectively and output terminal links to each other with described microcontroller, so that described microcontroller was counted the time interval that its output terminal level changes;
ON-OFF control circuit, it is connected between described weighing sensor and the integrating circuit and control end links to each other with described microcontroller, described weighing sensor is communicated with integrating circuit or disconnects selecting under the control of described microcontroller.
Reasonable is that in above-mentioned bar code information managing printing electronic scales, described analog to digital converter is installed on the independent printed circuit board and by shielding case and surrounds.
Reasonablely be, in above-mentioned bar code information managing printing electronic scales, described keyboard is 5 * 24 keyboards, described information indicating equipment is 21 charactrons and hummer, described microcontroller adopts the P89C51RD2 chip, described flash chip adopts the 29F040 chip, described Nonvolatile memory chip adopts the DS1250 chip, described clock chip adopts the DS12C887 chip, described address decoder adopts programmable logic device (PLD) GAL20V8, described IO interface adopts two 81C55 chips, their PA, the PB port is connected to described 5 * 24 keyboards and 21 charactrons altogether, wherein the pc port of a slice is connected to 5 * 24 keyboards, and the pc port of a slice is connected to described 29F040 chip in addition, the page of DS1250 chip is selected port and hummer.
Reasonable is that in above-mentioned bar code information managing printing electronic scales, described communication interface comprises RS232 interface and RS485 interface.
The failure rate of above-mentioned bar code information managing printing electronic scales is low, and function can be met the need of market fully, convenient and flexible operation, and reduced the manufacturing cost of product widely.
Description of drawings
Fig. 1 is the structured flowchart according to bar code information managing printing scale of the present utility model.
Fig. 2 is a preferred embodiments of analog to digital converter among Fig. 1.
Fig. 3 is a preferred embodiments of information process unit among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described.
As shown in Figure 1, bar code information managing printing electronic scales of the present utility model comprises weighing sensor 1, the analog to digital converter 2 that links to each other with weighing sensor 1, information process unit 3, printer 4, keyboard 5 and information indicating equipment 6, below is described in detail respectively.
In the utility model, weighing sensor 1 adopts aluminum alloy materials LY12 duralumin to make elastic body, on elastomeric structural design, main its sensitive part of consideration is fully responded to the weight that the external world adds up, and makes the induction amount of the foil gauge that is attached on the sensitive part linear with extraneous weight of adding up.Next considers that it can bear certain overload and unbalance loading.The 3rd will consider elastomeric machining accuracy, reduces scrappage etc.In elastomeric manufacture craft design, main consideration will be eliminated elastomeric machining stress earlier, drawing stress is synchronous between elastomeric cleanliness of its less important consideration and the paster, consider that once more sensor is under certain temperature variation, load same weight, the signal of its output should be constant all the time.Guarantee winter and claim the degree of accuracy of same weight summer.With variation of temperature, the aluminium of elastic body self has the rising-heat contracting-cold effect so also tackle its modulus and revise.Through above processing, foil gauge is posted the back form resistance bridge, its input end adds 5V voltage, and output terminal just has the signal output of a millivolt level, its semaphore is one-to-one relationship with extraneous weight of adding up, and then imports modulus (AD) converter into.
Simulating signal by weighing sensor 1 output is a millivolt level signal, and need consider following some factor when realizing modulus (AD) conversion: 1. over time, same weight can be drifted about when signal Processing, is called for short drift.2. with variation of temperature, same weight also can be drifted about when signal Processing, and promptly temperature is floated.3. when there was electromagnetic wave in the external world, the signal of same weight can be subjected to the signal stack of external electromagnetic ripple, i.e. electromagnetic interference (EMI).4. when there was static in the external world, the signal of same weight can be subjected to the stack of spike pulse, and it is electrostatic interference that signal can't be handled.
For reducing cost and improving arithmetic speed, adopt the integration AD converter, aanalogvoltage Va to be converted is transformed into proportional with it time interval T, and in the time, removes counting with the pulse of constant frequency at T, thus T is converted to digital N.
Fig. 2 is a preferred embodiments of this converter, as shown in Figure 2, model is that the operational amplifier U10, capacitor C 19 of OP07 etc. constitutes integrating circuit, the output voltage of weighing sensor 1 through the processing of filtering and amplifier U8 after analog switch 4051 is connected to the inverting input of operational amplifier U10.Time length when receiving through slope discharges such as the charging of the weighing sensor output voltage after filtering and the processing and amplifying and measurements in Fixed Time Interval can be converted to digital quantity with the output voltage of weighing sensor.Operational amplifier LM393 is a zero-crossing discriminator, and its inverting input links to each other with integrating circuit and normal phase input end links to each other with reference voltage, and its output terminal links to each other with the microcontroller that the back will be described.When inverting input during less than reference voltage, zero-crossing discriminator will produce reverse signal on its input end, so microcontroller can start or stop counting process in view of the above.Analog switch 4051 plays the effect of ON-OFF control circuit here, and its control end links to each other with microcontroller, therefore selects weighing sensor to be communicated with integrating circuit or to disconnect under the control of microcontroller, thereby finishes corresponding charging and discharge process.
In order to guarantee the stability of integration benchmark, the operational amplifier U9 that also to adopt another sheet model here be OP07 follows as benchmark.In addition, interference-free for guaranteeing the AD signal, AD converter is installed on the independent circuit board (hereinafter referred to as the AD plate), and adopts shielding case that this circuit board and outside electromagnetic interference are isolated.
In order to remove the influence of accidentalia to the weighing accuracy, microcontroller is handled the weighing signal in the following manner: every sampling was carried out numerical value to 10 mean values and is handled as a mean value in 6 o'clock again, wherein removed a maximal value and a minimum value; During every pair of next time slot sampling, just first of this 6 sampled points removed, add a new value, also only differ a sampled point between each mean value, move in circles, 10 new mean values of acquisition remove a maximal value, remove a minimum value.Such benefit is, if there is a spike pulse to come in can not influence weighing, numerical value is more stable, and arithmetic speed is each at 1/30 second.
The function of information process unit 3 is to calculate gravimetric value by the digital signal that the AD conversion obtains by linear relationship, meanwhile, multiply by acquisition amount of money value mutually according to the corresponding unit price of instruction calls of keyboard input and with gravimetric value, storages such as the value of information that gravimetric value, keyboard are called, the amount of money subsequently, and only once print the rear and remove above-mentioned value finishing.
As shown in Figure 3, information process unit comprises flash chip 31, Nonvolatile memory chip 32, clock chip 33, microcontroller 34 and IO interface 35, the address decoder 36 that links to each other with said chip that inserts bus and is connected communication interface 37 between microcontroller 34 and the printer, here, these unit are installed on the independent printed circuit board (hereinafter referred to as motherboard).
The P89C51RD2 that microcontroller 34 adopts PHILIPS company is as MCU, and the flash memory storage capacity is 64kB on the sheet, and memory size is 1kB, and clock frequency is 11.0592MHz.As mentioned above, this microcontroller links to each other with analog to digital converter 2 to obtain the digital quantity weighing signal of weighing sensor signal discharge time by the counting integrating circuit, and the real-time clock according to merchandise news in weighing signal, the flash chip 31 and clock chip 34 generates Transaction Information and delivers to Nonvolatile memory chip 35 through bus then.
Flash chip 31 internal memories contain merchandise news (PLU), and these information for example comprise commercial product code, Item Title, unit price, unit, the term of validity, information number, tare weight etc.In order to satisfy the needs of large supermarket, therefore the design capacity of the utility model flash chip 31 adopts the flash chip AT29C040 of internal memory 4M for can store 4000 PLU.Chip AT29C040 is divided into 16 pages and comes store commodity information, and the IO interface chip that will describe by the back is selected memory page for this reason.
Clock chip 33 adopts the DS12C887 chip, and its crystal oscillator, oscillatory circuit, charging circuit and chargeable lithium cell etc. are encapsulated in the top of chip together, forms the integrated circuit modules of a thickening, and charging circuit is just automatically to battery charge during power on circuitry.Filling once electricity can be for chip clock operation half a year, can guarantee during operate as normal that clock data can not lose in 10 years.Adopt DS12887 as real-time clock, in print procedure, call current date and time, and calculate guarantee date and time according to the term of validity; And can watch current date and time at any time.
In order to guarantee that print transaction information do not lose, adopt the DS1230 chip to realize that as Nonvolatile memory chip 32 outage preserves 1400 Transaction Informations of its memory capacity storage capable of circulation.Chip DS1230 is a 256k Nonvolatile static random access memory, and DS1250 is 512k * 8 Nonvolatile static random access memory, and the data that they are preserved under outage can not lost in 10 years.When DS1230 is upgraded to DS1250, carry out paging management by the following IO interface chip of will describing.
IO interface 35 comprises two RAM/IO 81C55 chip A able to programme and B, their PA, PB port are connected to 5 * 24 keyboards 5 and 21 charactron 6a altogether, wherein the pc port of a slice is connected to 5 * 24 keyboards, and the pc port of a slice is connected to the page selection port and the hummer 6b of flash chip 31, chip in addition.
Address decoder 36 adopts programmable logic device (PLD) GAL20V8, realizes address decoding by it being carried out the PLD design, thereby finishes the sheet selected control system to chip DS1230/DS1250, AT29C040, calendar clock chip DS12887 and 81C55 etc.
Because Transistor-Transistor Logic level and RS-232C level are incompatible, so communication interface 37 adopts the MAX232 chips to carry out level conversion, and selects to the PC communication or to printer communication by the control signal 485D and the WCS of microcontroller chip.
In to the PLU memory setting, can satisfy following function after the software programming: 1. print position can change, 2. printing angle can change, 3. printing cleanliness can adjust, 4. print What can increase and decrease, 5. the modification of Da Yining can be permanent modifications and revise two kinds immediately, and 6. the size of print paper can change.In the information processing of PLU, what time following can satisfy after the software programming: 1. unit price is revised immediately, 2. the instant discount of unit price, the 3. instant discount of the amount of money, 4. material object peeling and numeral peeling, 5. time, date revise immediately, 6. the article unit price is revised immediately, 7. automatically on time by quantity printing function, 8. continuous paper, label paper handoff functionality, 9. advertising slogan, trade name debugging functions, 10. bar code form selection function.In weight set is handled, can realize after the software programming that weight is demarcated, scaling position is demarcated, scale division value is demarcated, when handling quiet Dynamic Weighting,, can adjust arithmetic speed, to reach weighing in quiet stability under dynamic by the software setting mouth.The content X25045 that weight is set realizes storage.
When printing, MCU sends print command, is passed on the master control borad of printer by the RS232 oral instructions on the motherboard, and this control panel is mainly handled following function: 1. steering order is converted to characters such as Chinese words, English alphabet or arabic numeral, 2. control printhead work, 3. control motor and rotate.The function of this printer is: 1. serviceability temperature is 5 ℃～40 ℃; 2. paper can be adjusted; 3. the heat-sensitive paper performance is adjusted automatically; 4. a last heat-sensitive paper is not taken away, and a back heat-sensitive paper must not be printed; 5. printer paper is peeled off automatically; 6. the printer paper spacing is confirmed automatically; 7. the printhead automatic warning function that generates heat; 8. print sharpness and adjust function.
Above-mentioned electronic scales can pass through RS232, RS485, three kinds of communication ports of TCP/IP and extraneous communication.RS232, RS485 communication port are directly on motherboard the signal of microcontroller to be converted to the RS232 level by the Max232 integrated package by Transistor-Transistor Logic level, and by 75176 integrated packages conversion output RS485 signal, local networking just can realize by RS485.
The TCP/IP network interface is to be the TCP/IP mode by MOXA technical products NE-4000 with the RS232 conversion of signals, and the directly remote computer of connecting enters network work, by programming the Content of communciation of bar code scale is weaved into agreement.Under this agreement prerequisite, with extraneous network communication just can be unblocked.
Electronic scales has with extraneous main contents of communicating by letter: the parameter setting of merchandise news (item name, unit price, unit, the term of validity, commodity code), scale (bar code type, single double-range, gradation of drop-out colour etc.), trade name, TEXT text, specific information, current time modification, transaction record form etc.4000 PLU configure earlier on PC, by reaching motherboard under the RS232 mouth, so both can save time in a large number, again simple and convenient again.
The program of PC upper computer software adopts the VB language, and by communications protocol, many electronic scaless can be followed the IP address with passing at present.When mainboard machine and PC communication, can read weighing and the last amount of money of printing of immediate status.
Motherboard is sent operation result into 21 charactron 6a through the IO interface and is shown that charactron is made up of red high-brightness LED, is used to show various transaction processing results after microcontroller is finished computing.In addition, hummer 6b sends the sound when each keyboard is depressed, and alert is finished the one-touch operation.
Claims (5)
1, a kind of bar code information managing printing electronic scales comprises weighing sensor, the analog to digital converter that links to each other with weighing sensor, information process unit, printer, keyboard and information indicating equipment, it is characterized in that described information process unit comprises:
Insert the flash chip of bus, it stores merchandise news;
Insert the Nonvolatile memory chip of described bus;
Insert the clock chip of described bus, it provides real-time clock by described data bus;
The communication interface that links to each other with printer;
Insert the microcontroller of described bus, it links to each other with communication interface with described analog to digital converter, generate Transaction Information according to weighing signal, merchandise news and real-time clock, and described Transaction Information is delivered to printer and delivered to described Nonvolatile memory chip through described bus through described communication interface;
Insert the IO interface of described bus, it links to each other with information indicating equipment with described keyboard, so that the keyboard input instruction is delivered to described microcontroller through described bus, receives Transaction Information and delivers to described information indicating equipment from described microcontroller through described bus; And
With the address decoder that described microcontroller, flash chip, Nonvolatile memory chip, clock chip and IO interface link to each other, it produces sheet selected control system signal under the control of described microcontroller.
2, bar code information managing printing electronic scales as claimed in claim 1 is characterized in that described analog to digital converter comprises:
Integrating circuit, its in Fixed Time Interval, receive described weighing sensor output voltage charging and etc. slope discharge be converted to time of corresponding proportion with output voltage with described weighing sensor;
Zero-crossing discriminator, two input end link to each other with reference voltage with described integrating circuit respectively and output terminal links to each other with described microcontroller, so that described microcontroller was counted the time interval that its output terminal level changes;
ON-OFF control circuit, it is connected between described weighing sensor and the integrating circuit and control end links to each other with described microcontroller, described weighing sensor is communicated with integrating circuit or disconnects selecting under the control of described microcontroller.
3, bar code information managing printing electronic scales as claimed in claim 2 is characterized in that, described analog to digital converter is installed on the independent printed circuit board and by shielding case and surrounds.
4, as any described bar code information managing printing electronic scales in the claim 1～3, it is characterized in that, described keyboard is 5 * 24 keyboards, described information indicating equipment is 21 charactrons and hummer, described microcontroller adopts the P89C51RD2 chip, described flash chip adopts the 29F040 chip, described Nonvolatile memory chip adopts the DS1250 chip, described clock chip adopts the DS12C887 chip, described address decoder adopts programmable logic device (PLD) GAL20V8, described IO interface adopts two 81C55 chips, their PA, the PB port is connected to described 5 * 24 keyboards and 21 charactrons altogether, wherein the pc port of a slice is connected to 5 * 24 keyboards, and the pc port of a slice is connected to described 29F040 chip in addition, the page of DS1250 chip is selected port and hummer.
5, bar code information managing printing electronic scales as claimed in claim 4 is characterized in that, described communication interface comprises RS232 interface and RS485 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420107488 CN2743807Y (en) | 2004-10-22 | 2004-10-22 | Barcode information managing printing electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420107488 CN2743807Y (en) | 2004-10-22 | 2004-10-22 | Barcode information managing printing electronic scale |
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| Publication Number | Publication Date |
|---|---|
| CN2743807Y true CN2743807Y (en) | 2005-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420107488 Expired - Fee Related CN2743807Y (en) | 2004-10-22 | 2004-10-22 | Barcode information managing printing electronic scale |
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| Country | Link |
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| CN (1) | CN2743807Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154977A (en) * | 2014-08-27 | 2014-11-19 | 梧州市旺捷机械制造有限公司 | Weighing instrument |
| CN105818549A (en) * | 2015-01-04 | 2016-08-03 | 梅特勒-托利多(常州)测量技术有限公司 | Common label printer and base paper-free printer switching structure and switching method thereof |
-
2004
- 2004-10-22 CN CN 200420107488 patent/CN2743807Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154977A (en) * | 2014-08-27 | 2014-11-19 | 梧州市旺捷机械制造有限公司 | Weighing instrument |
| CN105818549A (en) * | 2015-01-04 | 2016-08-03 | 梅特勒-托利多(常州)测量技术有限公司 | Common label printer and base paper-free printer switching structure and switching method thereof |
| CN105818549B (en) * | 2015-01-04 | 2018-04-27 | 梅特勒-托利多(常州)测量技术有限公司 | Ordinary label printer and without base paper printer switching construction and its switching method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051130 Termination date: 20121022 |