CN202271673U - High speed control board for thermal line printer - Google Patents
High speed control board for thermal line printer Download PDFInfo
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- CN202271673U CN202271673U CN 201120407206 CN201120407206U CN202271673U CN 202271673 U CN202271673 U CN 202271673U CN 201120407206 CN201120407206 CN 201120407206 CN 201120407206 U CN201120407206 U CN 201120407206U CN 202271673 U CN202271673 U CN 202271673U
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- high speed
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Abstract
The utility model discloses a high speed control board for a thermal line printer, which comprises a central processing unit (CPU) control chip. The periphery of the CPU control chip is respectively connected with a power supply, a man-machine interface, a joint test action group (JTAG) debugging interface, a universal serial bus (USB) interface, a serial parallel interface, a stepped motor driving circuit, a paper lack detection circuit, a printing head driving circuit, a printing head temperature detection circuit, a word stock FLASH storage and a reset circuit. The high speed control board for the thermal line printer has the advantages of being high-speed, real-time, clear, low-noise and the like and can meet requirements of electrocardiogram machines for printing electrocardio data pictures and texts.
Description
Technical field
The utility model discloses a kind of printer control panel, particularly a kind of high speed line-type thermal printer control panel.
Background technology
Thermal printer has advantages such as noise is low, speed is fast, reliability is high, printable character is clear, is used widely in fields such as POS terminal system, banking system, Medical Instruments at present.Thermal printer can be divided into line-type thermal (thermal line dot system) and row formula temperature-sensitive (thermal serial dot system) according to the arrangement mode of its temperature-sensitive element.Row formula temperature-sensitive belongs to early production, is mainly used in some at present to the less demanding occasion of print speed, and domestic had a precedent of in product, using.Line-type thermal belongs to the technology nineties in 20th century, and its print speed is much faster than row formula temperature-sensitive, and prestissimo has reached 220mm/s at present.Realize the high speed thermal printing, except choosing the high speed thermal printing head, also must have the control corresponding plate to cooperate with it.The problem that the existing printer control panel exists on the China market at present is: 1, a little less than the MCU function.Show that mainly the work dominant frequency is low, data-bus width is narrow, the data operation ability.2, print speed is too slow, can't satisfy the demand that the electrocardiograph high-speed real-time is printed.3, the width of printing is too little.Can't satisfy the electrocardiograph requirement and print the requirement of 12 guided wave shapes simultaneously.4, the cost bought of complete machine is too high, and can't it be embedded in the development product and go.
The utility model content
The utility model purpose: the utility model technical problem to be solved is the deficiency to prior art, and a kind of high speed line-type thermal printer control panel is provided.
In order to solve the problems of the technologies described above; The utility model discloses a kind of high speed line-type thermal printer control panel; Comprise the CPU control chip, said CPU control chip periphery connects power supply, man-machine interface, JTAG debugging interface, USB interface, serial-parallel interface, stepper motor driving circuit respectively, lacks paper testing circuit, print-head drive circuit, printhead temperature testing circuit, character library FLASH memory and reset circuit.
In the utility model, it is the chip of LPC2214 that said CPU control chip adopts model.
In the utility model, said power supply comprises the LM2575 switching power source chip.
In the utility model, said reset circuit comprises the 74HC125A chip.
In the utility model, stepper motor driving circuit comprises that model is the chip of A2919SLB.
The heat that the described thermal printing of the utility model produces when utilizing electric current to flow through heater element turns black the special paper-heat-sensitive paper that is close to the heater element surface rapidly, thereby leaves a trace on paper, forms figure and character.Heater element is to be made on the ceramic substrate with physicochemical method; The surface scribbles the diaphragm of one deck as glass glaze, and to prevent the wearing and tearing of heater element, present technological level is accomplished 8 points/mm (200DPI) with the density of heater element; 16 points/mm (400DPI), in addition higher.By laterally or vertically arranging, utilize the special control means to these heater elements, the size and the element direction of motion of heater element electric current is flow through in control, will on heat-sensitive paper, print off desired figure and literal.
When heater element by paper move towards line of transversely arranged one-tenth the time, just form line-type thermal and print.It once can print whole some row simultaneously when printing, when 24 of paper feeds are capable, just can print the character of the 24X24 of delegation dot matrix.Because do not have moving of printing head, print speed obviously improves, to print than row formula usually and improve more than 10 times, print quality is better.Because the repetitive positioning accuracy problem that does not have printhead to move to be caused, so be fit to print the waveform of vertical lines, it is lower to print noise, and printing mechanism is simpler, the life-span is longer.Each line thermal head is divided into some groups, and every group has some thermistors, each thermistor corresponding one group of device (shift register, buffer register, gating circuit).Under the effect of clock signal C LOCK, data are from the input of DATA IN end, through the triggering of LATCH signal; Get into buffer register; When output enable end STROBE is high level, be that 1 position is just through exporting driving resistor voltage with door in the buffer register; Make resistance heating, thereby on heat-sensitive paper, stay next stain.
Beneficial effect: the utlity model has at a high speed, advantage such as real-time, clear, low noise, can satisfy the needs of electrocardiograph well to the electrocardiogram (ECG) data figure message printing.
Description of drawings
Below in conjunction with accompanying drawing and the specific embodiment the utility model is done specifying further, the above-mentioned and/or otherwise advantage of the utility model will become apparent.
Fig. 1 is a system hardware structure sketch map of the present invention.
The specific embodiment
As shown in Figure 1; The utility model discloses a kind of high speed line-type thermal printer control panel; Comprise the CPU control chip, said CPU control chip periphery connects power supply, man-machine interface, JTAG debugging interface, USB interface, serial-parallel interface, stepper motor driving circuit respectively, lacks paper testing circuit, print-head drive circuit, printhead temperature testing circuit, character library FLASH memory and reset circuit.It is the chip of LPC2214 that said CPU control chip adopts model.Said power supply comprises the LM2575 switching power source chip.Said reset circuit comprises the 74HC125A chip.Stepper motor driving circuit comprises that model is the chip of A2919SLB.
Embodiment
The present embodiment master controller adopts 32 ARM LPC2214 of PHILIP company.The beginning to print or stop to print of man-machine interface by the key control system.Carry out the reception of data by LPC2214 through serial, parallel or USB interface; The processing that the data of receiving are correlated with; From word-base chip, take out type matrix according to process result then; The waveform correlation data that draw together with computing together are sent to the buffering of printhead and start heating, and after heating finished, LPC2214 is control step motor rotation paper feed again.LPC2214 also will detect printhead temperature and printing paper in real time, and the outage in case printhead temperature is too high is found to lack paper and reported to the police with regard to bright lamp.
1, power unit.
Because the operating voltage of printhead is direct current+24V is the ceiling voltage that system needs, and in order to simplify external power supply, other voltages that need on the circuit board are just come by+24V transformation.Change to+5V by+24V, adopt the LM2575 switching power source chip.By+5V change to+1.8V just adopts LT1117-1.8V, LT1117-3.3V with+3.3V.Simultaneously, guarantee systematic function, externally+when the DC voltage of 24V gets into system, carry out filtering with the electric capacity of diode and 470uF in order to reduce electromagnetic interference.Diode can also play and prevent that external power source from connecing anti-effect.Power supply input pin in system's main chip adds decoupling capacitor simultaneously, also can effectively improve the EMI of circuit.
2, reset circuit
Reset signal RST comes out to connect the 74HC125A chip, through two triple gates of 74HC125A chip internal, sees SP708S off come reset signal and is divided into two, and one the tunnel send the cpu reset pin, and the reset pin of JTAG debugging interface is sent on another road.（
3, stepper motor driving circuit
The stepper motor model that present embodiment adopts is 42BYG304, and this is one two a phase inductor type stepper motor.To the driving of this stepper motor, adopt step motor drive chip A2919SLB.A2919SLB can be used for driving two coils of bipolar stepping motor, and can carry out the segmentation control in 1/2 step and 1/4 step.Chip internal has two can be exported ceiling voltage and reach+and the electric bridge of 45V and two can export the PWM modulator that maximum current reaches 750mA.
When with the PWM current control mode time, reference voltage and the control of detection resistance that maximum output current is selected by the user.The percentage that two logic incoming levels of chip are controlled actual output current and maximum output current is 0%, 41%, 67%, or 100%.The PHASE input pin control sense of current of each PWM modulator.
There are ground connection clamper and feedback diode to be used for doing the faradic back flow protection of transient state in the electric bridge.Inner " time-delay " mechanism can stop the transition current when carrying out sense of current switching.The overheating protection circuit of chip internal cuts off the electric current output of electric bridge automatically when the temperature of chip surpasses safe temperature.
4, printer interface circuit
The C216 printhead has 15 pins, and the 1st, 2,3 pins connect+24V through the IRF4905 switching tube.The the 9th to 15 pin is the signal and the logic control pin of printhead, and operating voltage all is+5V, and the voltage of the I/O pin of CPU all is 3.3V, so for the reliable transmission of signal, carry out voltage transitions with 74LVC4245A.
5, lack the paper testing circuit
In printer, have in the paper since the infraluminescence pipe with infrared light reflection to the infrared light receiving tube, the infrared receiving tube conducting, the input of follower is a low level.When lacking paper, owing to infrared light does not reflex on the receiving tube, so; Receiving tube is in off state; The input of follower is a high level, and the variation of this high-low level is received on the external interrupt EINT2 pin of CPU through a follower, is used for detecting whether lacking paper.
6, printhead temperature testing circuit
Adopt the principle of electric resistance partial pressure, the non-essential resistance dividing potential drop of connecting with printhead temperature detection resistance.The effect of follow circuit is to isolate carrying out impedance between signal generating circuit and the cpu signal collection pin in the design.Because LPC2214 has the unit of the conversion of A/D on the sheet, institute imports the terminal voltage of THERMISTOR as the analog signal of the outside A/D converting unit of CPU.
7, usb circuit
Adopt the connecting circuit of CH375 and LPC2214.The TXD pin of CH375 passes through pull down resistor ground connection or the direct ground connection about 1K, thereby makes CH375 work in the parallel port mode.
Usb bus comprises a pair of 5V power line and a pair of data signal line.Usually ,+5V power line is red, and earth connection is a black, and the D+ holding wire is green, and the D-holding wire is a white, and the USB supply voltage must be 5V.
If the power supply electrifying process is slow and power cut-off after discharge time longer, CH375 can not reliable reset so.Capacitor C 11 that can capacity of cross-over connection is 0.47uF between RST1 pin and VCC can reduce interference simultaneously.
The utility model provides a kind of thinking and method of high speed line-type thermal printer control panel; The method and the approach of concrete this technical scheme of realization are a lot, and the above only is the preferred implementation of the utility model, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.The all available prior art of each part not clear and definite in the present embodiment realizes.
Claims (5)
1. high speed line-type thermal printer control panel; It is characterized in that; Comprise the CPU control chip, said CPU control chip periphery connects power supply, man-machine interface, JTAG debugging interface, USB interface, serial-parallel interface, stepper motor driving circuit respectively, lacks paper testing circuit, print-head drive circuit, printhead temperature testing circuit, character library FLASH memory and reset circuit.
2. a kind of high speed line-type thermal printer control panel according to claim 1 is characterized in that, it is the chip of LPC2214 that said CPU control chip adopts model.
3. a kind of high speed line-type thermal printer control panel according to claim 1 is characterized in that said power supply comprises the LM2575 switching power source chip.
4. a kind of high speed line-type thermal printer control panel according to claim 1 is characterized in that said reset circuit comprises the 74HC125A chip.
5. a kind of high speed line-type thermal printer control panel according to claim 1 is characterized in that stepper motor driving circuit comprises that model is the chip of A2919SLB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120407206 CN202271673U (en) | 2011-10-24 | 2011-10-24 | High speed control board for thermal line printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120407206 CN202271673U (en) | 2011-10-24 | 2011-10-24 | High speed control board for thermal line printer |
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| Publication Number | Publication Date |
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| CN202271673U true CN202271673U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120407206 Expired - Lifetime CN202271673U (en) | 2011-10-24 | 2011-10-24 | High speed control board for thermal line printer |
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| CN (1) | CN202271673U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935764A (en) * | 2012-11-15 | 2013-02-20 | 无锡中亚工具厂 | Real-time temperature-sensitive printing device |
| CN103342054A (en) * | 2013-05-22 | 2013-10-09 | 深圳市爱夫卡科技有限公司 | Thermal printer for automotive fault diagnostic apparatus and automotive fault diagnostic apparatus |
| CN104191824A (en) * | 2014-09-19 | 2014-12-10 | 青岛海信智能商用系统有限公司 | Thermal printer and method for controlling same |
| CN109484038A (en) * | 2018-12-26 | 2019-03-19 | 深圳市美松智能设备有限公司 | A kind of hardware system of printer |
| CN109515006A (en) * | 2018-11-06 | 2019-03-26 | 安徽瀚洋纸品印刷有限公司 | A kind of thermal printing machine control system |
| CN110126475A (en) * | 2019-06-17 | 2019-08-16 | 珠海趣印科技有限公司 | A kind of high-precision thermal printer |
| CN110936726A (en) * | 2019-12-04 | 2020-03-31 | 深圳市格致微芯科技有限责任公司 | Novel self-driven thermal printing head |
| CN111591043A (en) * | 2020-05-14 | 2020-08-28 | 上海世麦智能科技有限公司 | Stepping motor speed control method based on thermal printer and thermal printer |
| CN112180793A (en) * | 2020-09-30 | 2021-01-05 | 深圳市千里智能控制科技有限公司 | Multi-shaft and multi-nozzle ink-jet controller |
| CN115610113A (en) * | 2021-07-14 | 2023-01-17 | 东芝泰格有限公司 | Printer and storage medium |
-
2011
- 2011-10-24 CN CN 201120407206 patent/CN202271673U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935764B (en) * | 2012-11-15 | 2015-08-19 | 无锡中亚工具厂 | Real-time thermal printing apparatus |
| CN102935764A (en) * | 2012-11-15 | 2013-02-20 | 无锡中亚工具厂 | Real-time temperature-sensitive printing device |
| CN103342054A (en) * | 2013-05-22 | 2013-10-09 | 深圳市爱夫卡科技有限公司 | Thermal printer for automotive fault diagnostic apparatus and automotive fault diagnostic apparatus |
| CN104191824A (en) * | 2014-09-19 | 2014-12-10 | 青岛海信智能商用系统有限公司 | Thermal printer and method for controlling same |
| CN109515006A (en) * | 2018-11-06 | 2019-03-26 | 安徽瀚洋纸品印刷有限公司 | A kind of thermal printing machine control system |
| CN109484038B (en) * | 2018-12-26 | 2024-04-19 | 深圳市美松智能设备有限公司 | Hardware system of printer |
| CN109484038A (en) * | 2018-12-26 | 2019-03-19 | 深圳市美松智能设备有限公司 | A kind of hardware system of printer |
| CN110126475A (en) * | 2019-06-17 | 2019-08-16 | 珠海趣印科技有限公司 | A kind of high-precision thermal printer |
| CN110126475B (en) * | 2019-06-17 | 2024-02-09 | 珠海趣印科技有限公司 | High-precision thermal printer |
| CN110936726A (en) * | 2019-12-04 | 2020-03-31 | 深圳市格致微芯科技有限责任公司 | Novel self-driven thermal printing head |
| CN111591043A (en) * | 2020-05-14 | 2020-08-28 | 上海世麦智能科技有限公司 | Stepping motor speed control method based on thermal printer and thermal printer |
| CN112180793A (en) * | 2020-09-30 | 2021-01-05 | 深圳市千里智能控制科技有限公司 | Multi-shaft and multi-nozzle ink-jet controller |
| CN115610113A (en) * | 2021-07-14 | 2023-01-17 | 东芝泰格有限公司 | Printer and storage medium |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210006 Zhongshan South Road, Nanjing, Nanjing, Jiangsu Patentee after: Zhong Tong clothing consulting and Design Research Institute Co., Ltd. Address before: 210006 Zhongshan South Road, Nanjing, Nanjing, Jiangsu Patentee before: Jiangsu Posts & Telecommunications Planning and Designing Institute Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |