CN105629885A - Application of VUSB technology in numerical control machine tool power supply - Google Patents
Application of VUSB technology in numerical control machine tool power supply Download PDFInfo
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- CN105629885A CN105629885A CN201510981995.9A CN201510981995A CN105629885A CN 105629885 A CN105629885 A CN 105629885A CN 201510981995 A CN201510981995 A CN 201510981995A CN 105629885 A CN105629885 A CN 105629885A
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- vusb
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- power supply
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- dacmax522
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
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- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Power Sources (AREA)
Abstract
The present invention relates to the application of the VUSB technology in a numerical control machine tool power supply. The application comprises a single chip microcomputer, DACMAX522, a two-path integrated operational amplifier, an emitter output, a voltage regulation circuit, a VUSB interface circuit and a power supply. The single chip microcomputer is connected to the DACMAX522 and the VUSB interface circuit through signals. The invention provides a numerical control DC voltage regulation power supply with high adjustment precision and convenient operation, an AVR series single chip microcomputer Atmega8 is used as a master control unit, the output voltage of a D/A conversion chip MAX522 is set through different digital inputs, DAC output voltage is subjected to voltage and current amplification through a two-level operational amplifier formed by uA 741, the VUSB is simple and easy, the cost is low, and one USB system can be formed by a common low-cost AVR single chip microcomputer and few external components.
Description
Technical field
The present invention relates to the applied technical field of VUSB technology in numerically-controlled machine power supply, particularly relate to the application of a kind of VUSB technology in numerically-controlled machine power supply.
Background technology
Numerical-control direct-current voltage stabilized source is one of equipment conventional in electronic technology, current used be by twist switch regulation voltage level mostly, sharpness of regulation is not high, and saltus step often occurs, it may also be useful to get up extremely inconvenient. This numerical-control direct-current voltage stabilized source arranges the digital quantity being input to DAC by upper computer, exports the voltage that stepping is adjustable. The USB that upper computer is simulated by software with lower computer communicates. Traditional micro-chip and computer carry out usb communication, it is necessary to use special interface chip to carry out usb protocol conversion, such as CP2101, FT232, CH342, PDIUSBD12, SL811 etc. Although using simply as the such chip of CP2101, FT232, but function ratio is more single; And PDIUSBD12, SL811 function is relatively strong, but use complicated. And the price of these special chips is all relatively high, add the cost of system.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it provides the application of a kind of VUSB technology in numerically-controlled machine power supply.
The present invention is achieved through the following technical solutions: the application of a kind of VUSB technology in numerically-controlled machine power supply, comprise micro-chip, DACMAX522, two-way integrated transporting discharging, emitter-base bandgap grading exports, voltage stabilizing circuit, VUSB interface circuit and power supply, described micro-chip is connected with DACMAX522 with VUSB interface circuit respectively by signal, described voltage stabilizing circuit is connected with DACMAX522, described DACMAX522 is connected with two-way integrated transporting discharging, described two-way integrated transporting discharging exports with emitter-base bandgap grading and is connected, described power supply is exported with two-way integrated transporting discharging emitter-base bandgap grading respectively by wire, voltage stabilizing circuit is connected with micro-chip, described DACMAX522 inside is provided with MAX522 chip, 8,2 tunnel voltage Buffer output D/A transmodulator it is provided with in described MAX522 chip, 8 pin save encapsulation and DIP encapsulation, described MAX522 chip is provided with 3 line serial line interfaces, described D/A transmodulator comprises DACA and DACB, described DACMAX522 inside is provided with analog to digital conversion module.
As preferably, the PB0 port of described micro-chip meets serial date transfer mouth DIN, the PB1 contact pin of micro-chip selects the PB2 port of signal CS, micro-chip to meet clocksignal SCLK, select DACA as output, export the electric capacity connecting a 0.1 �� F with reference voltage input terminal respectively, improving circuit output stability, the VDD of MAX522 chip and reference voltage end provide by 5.12V voltage stabilizing circuit.
As preferably, described two-way integrated transporting discharging comprises the amplifier section of 2 �� A741 high gain operational amplifier compositions and the emitter-base bandgap grading output part of triode ZTX453 composition; First step �� A741AN is reverse feedback buffer circuit, in order to reduce output resistance and to make the wide increase frequently of amplification frequency; Second stage �� A741ANA forms voltage just to scale amplifying circuit; Voltage signal access emitter-follower ZTX453 after amplification, amplifies the electric current of output signal.
As preferably, PD1 and PD2 of described micro-chip accesses D-, D+ of standard USB interface respectively by the current limliting resistance of 68 ��, on D-and D+ respectively and connect the Zener diode of a 3.6V.
As preferably, described DACA end snubber working current can reach 5mA, DACB end snubber working current can reach 500 �� A, and MAX522 is operated in unidirectional voltage+2.7V ~+5.5V.
As preferably, described micro-chip is provided with lower computer and upper computer 2 part, described lower computer and upper computer 2 part, slave computer software flow process: equipment loop initialization wheel ask USBPoll () detect USB event enter event handling function and receive data to D A write voltage is set.
The present invention provides a kind of sharpness of regulation height, numerical-control direct-current voltage stabilized source easy and simple to handle. Adopt AVR series monolithic Atmega8 as master control unit, the output voltage of D/A conversion chip MAX522 is set by the input of different digital quantities. DAC output voltage then carries out electric current and voltage amplification through the two stage amplifer circuit of �� A741 composition and emitter-follower ZTX453. Wherein the 5.12V reference voltage of DAC input is produced by LM366 integrated voltage-stabilized device. Upper computer, by carrying out communication based on the distinctive VUSB technology of AVR single chip and lower computer, describes USB device under Windows platform simultaneously and drives the realization of program. This voltage source achieves the visible and controllability that magnitude of voltage reads and arranges, and can be used as the embedded power supply module of part testing apparatus and uses; VUSB is easy to use, with low cost, it is only necessary to a common low cost AVR single chip and little several outside elements, so that it may to form a USB system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings;
Fig. 1 is the numerical-control direct-current source of stable pressure composition schematic diagram of the present invention;
Fig. 2 is analog to digital conversion and the voltage stabilizing circuit diagram of the present invention;
The electric current and voltage that Fig. 3 is the present invention amplifies circuit diagram;
Fig. 4 is the VUSB interface circuit schematic diagram of the present invention;
Fig. 5 is the slave computer software schematic flow sheet of the present invention;
Fig. 6 is the upper computer software schematic flow sheet of the present invention.
Embodiment
In order to make the object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. It is to be understood that specific embodiment described herein is only in order to explain the present invention, it is not intended to limit the present invention; Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention are made more explicit defining.
As shown in figures 1 to 6, the present invention relates to the application of a kind of VUSB technology in numerically-controlled machine power supply, comprise micro-chip, DACMAX522, two-way integrated transporting discharging, emitter-base bandgap grading exports, voltage stabilizing circuit, VUSB interface circuit and power supply, described micro-chip is connected with DACMAX522 with VUSB interface circuit respectively by signal, described voltage stabilizing circuit is connected with DACMAX522, described DACMAX522 is connected with two-way integrated transporting discharging, described two-way integrated transporting discharging exports with emitter-base bandgap grading and is connected, described power supply is exported with two-way integrated transporting discharging emitter-base bandgap grading respectively by wire, voltage stabilizing circuit is connected with micro-chip, described DACMAX522 inside is provided with MAX522 chip, 8,2 tunnel voltage Buffer output D/A transmodulator it is provided with in described MAX522 chip, 8 pin save encapsulation and DIP encapsulation, described MAX522 chip is provided with 3 line serial line interfaces, described D/A transmodulator comprises DACA and DACB, described DACMAX522 inside is provided with analog to digital conversion module.
The PB0 port of described micro-chip meets serial date transfer mouth DIN, the PB1 contact pin of micro-chip selects the PB2 port of signal CS, micro-chip to meet clocksignal SCLK, select DACA as output, export the electric capacity connecting a 0.1 �� F with reference voltage input terminal respectively, improving circuit output stability, the VDD of MAX522 chip and reference voltage end provide by 5.12V voltage stabilizing circuit; LM336 unicircuit is accurate 5V potentiostat, its work be equivalent to a low-temperature coefficient, dynamic resistance be the 5V Zener diode of 0.2 ��, wherein finely tune end (G) and votage reference and temperature factor can be made to be finely tuned. By regulating adjustable resistance to regulate the output voltage of LM336 to be that 5.12V. is so the resolving power of MAX522 output voltage is 5.12/256=0.02V, that is MAX522 digital input amount often increases by 1, voltage just increase 0.02V. due to electric power output voltage scope be 0 ~ 12V, stepping accuracy is 0.1V, then maximum input data are 120(scale-of-two value is 11110000), the output voltage that now MAX522 output value is 2.4V. and MAX522 changes at 0 ~ 2.4V.
The voltage range exported due to MAX522 is 0 ~ 2.4V, and the voltage output range required is 0 ~ 12V, so needing to export MAX522 to amplify 5 times. Meanwhile, in order to improve the driving force of power supply, after amplification circuit, add an emitter-follower; Described two-way integrated transporting discharging comprises the amplifier section of 2 �� A741 high gain operational amplifier compositions and the emitter-base bandgap grading output part of triode ZTX453 composition; First step �� A741AN is reverse feedback buffer circuit, in order to reduce output resistance and to make the wide increase frequently of amplification frequency; Second stage �� A741ANA forms voltage just to scale amplifying circuit; Voltage signal access emitter-follower ZTX453 after amplification, amplifies the electric current of output signal.
PD1 and PD2 of described micro-chip accesses D-, D+ of standard USB interface respectively by the current limliting resistance of 68 ��, on D-and D+ respectively and connect the Zener diode of a 3.6V; VUSB is by common general AVR single chip, it is equipped with the crystal oscillator (12MHz or 16MHz) of higher-frequency rate, simulation produces USB desired signal, thus simulates the solution of the USBHID equipment (mouse, keyboard, simple communication) of standard, forms the USB device of a low cost. USB has 4 lines, 2 5V power supplys, and two differential signal lines D+, D-. are owing to being low-speed device, and D-is it is necessary to have the pull-up resistor of 1.5k ��; It should be noted that D+ must connect external interrupt 0 pin of micro-chip, in this case simplify and connect PD2(INT0 directly) access is as a signal wire use wherein. Owing to the voltage of usb signal line is 3.6V to the maximum, thus on D-and D+ respectively and connect the Zener diode of a 3.6V.
Described DACA end snubber working current can reach 5mA, DACB end snubber working current can reach 500 �� A, and MAX522 is operated in unidirectional voltage+2.7V ~+5.5V.
Described micro-chip is provided with lower computer and upper computer 2 part, described lower computer and upper computer 2 part, slave computer software flow process: equipment loop initialization wheel ask USBPoll () detect USB event enter event handling function and receive data to D A write voltage is set.
Upper computer software mainly comprises display unit connecting state, write magnitude of voltage and reads the functions such as current voltage value. Upper computer software schema is as shown in Figure 6
The standardized parts that the present invention uses all can be commercially, shaped piece all can carry out customized according to the record with accompanying drawing of specification sheets, the concrete mode of connection of each part all adopts the conventional meanses such as bolt ripe in prior art, rivet, welding, machinery, part and equipment all adopt in prior art, conventional model, add that circuit connects and adopt mode of connection conventional in prior art, be not described in detail in this.
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. done within the spirit and principles in the present invention, all should be included within protection scope of the present invention.
Claims (6)
1. application in numerically-controlled machine power supply of a VUSB technology, it is characterized in that, comprise micro-chip, DACMAX522, two-way integrated transporting discharging, emitter-base bandgap grading exports, voltage stabilizing circuit, VUSB interface circuit and power supply, described micro-chip is connected with DACMAX522 with VUSB interface circuit respectively by signal, described voltage stabilizing circuit is connected with DACMAX522, described DACMAX522 is connected with two-way integrated transporting discharging, described two-way integrated transporting discharging exports with emitter-base bandgap grading and is connected, described power supply is exported with two-way integrated transporting discharging emitter-base bandgap grading respectively by wire, voltage stabilizing circuit is connected with micro-chip, described DACMAX522 inside is provided with MAX522 chip, 8,2 tunnel voltage Buffer output D/A transmodulator it is provided with in described MAX522 chip, 8 pin save encapsulation and DIP encapsulation, described MAX522 chip is provided with 3 line serial line interfaces, described D/A transmodulator comprises DACA and DACB, described DACMAX522 inside is provided with analog to digital conversion module.
2. the application of a kind of VUSB technology according to claim 1 in numerically-controlled machine power supply, it is characterized in that, the PB0 port of described micro-chip meets serial date transfer mouth DIN, the PB1 contact pin of micro-chip selects the PB2 port of signal CS, micro-chip to meet clocksignal SCLK, select DACA as output, export the electric capacity connecting a 0.1 �� F with reference voltage input terminal respectively, it is to increase circuit output stability, the VDD of MAX522 chip and reference voltage end provide by 5.12V voltage stabilizing circuit.
3. the application of a kind of VUSB technology according to claim 1 in numerically-controlled machine power supply, it is characterized in that, described two-way integrated transporting discharging comprises the amplifier section of 2 �� A741 high gain operational amplifier compositions and the emitter-base bandgap grading output part of triode ZTX453 composition; First step �� A741AN is reverse feedback buffer circuit, in order to reduce output resistance and to make the wide increase frequently of amplification frequency; Second stage �� A741ANA forms voltage just to scale amplifying circuit; Voltage signal access emitter-follower ZTX453 after amplification, amplifies the electric current of output signal.
4. the application of a kind of VUSB technology according to claim 1 in numerically-controlled machine power supply, it is characterized in that, PD1 and PD2 of described micro-chip accesses D-, D+ of standard USB interface respectively by the current limliting resistance of 68 ��, on D-and D+ respectively and connect the Zener diode of a 3.6V.
5. the application of a kind of VUSB technology according to claim 1 in numerically-controlled machine power supply, it is characterized in that, described DACA end snubber working current can reach 5mA, DACB end snubber working current can reach 500 �� A, and MAX522 is operated in unidirectional voltage+2.7V��+5.5V.
6. the application of a kind of VUSB technology according to claim 1 in numerically-controlled machine power supply, it is characterized in that, described micro-chip is provided with lower computer and upper computer 2 part, described lower computer and upper computer 2 part, slave computer software flow process: equipment loop initialization wheel ask USBPoll () detect USB event enter event handling function and receive data to D A write voltage is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981995.9A CN105629885A (en) | 2015-12-23 | 2015-12-23 | Application of VUSB technology in numerical control machine tool power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981995.9A CN105629885A (en) | 2015-12-23 | 2015-12-23 | Application of VUSB technology in numerical control machine tool power supply |
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| Publication Number | Publication Date |
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| CN105629885A true CN105629885A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510981995.9A Pending CN105629885A (en) | 2015-12-23 | 2015-12-23 | Application of VUSB technology in numerical control machine tool power supply |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012713A (en) * | 2009-09-04 | 2011-04-13 | 南通恒帅机电设备有限公司 | Numerical control direct current voltage source |
| US8699304B2 (en) * | 2010-09-03 | 2014-04-15 | Seiko Instruments Inc. | Electronic device, electronic device control method, and electronic device control program |
| CN203759575U (en) * | 2014-03-20 | 2014-08-06 | 宿州学院 | Numerical control direct current source |
-
2015
- 2015-12-23 CN CN201510981995.9A patent/CN105629885A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012713A (en) * | 2009-09-04 | 2011-04-13 | 南通恒帅机电设备有限公司 | Numerical control direct current voltage source |
| US8699304B2 (en) * | 2010-09-03 | 2014-04-15 | Seiko Instruments Inc. | Electronic device, electronic device control method, and electronic device control program |
| CN203759575U (en) * | 2014-03-20 | 2014-08-06 | 宿州学院 | Numerical control direct current source |
Non-Patent Citations (1)
| Title |
|---|
| 周国祥等: "基于VUSB的数控直流稳压电源的设计", 《电子测量技术》 * |
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