CN103901801B - There is the infrared explosion-proof manual operator of USB interface - Google Patents
There is the infrared explosion-proof manual operator of USB interface Download PDFInfo
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- CN103901801B CN103901801B CN201410117551.6A CN201410117551A CN103901801B CN 103901801 B CN103901801 B CN 103901801B CN 201410117551 A CN201410117551 A CN 201410117551A CN 103901801 B CN103901801 B CN 103901801B
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- usb interface
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- manual operator
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- 238000004891 communication Methods 0.000 claims abstract description 19
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000013500 data storage Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000005955 Ferric phosphate Substances 0.000 claims description 7
- 229940032958 ferric phosphate Drugs 0.000 claims description 7
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 7
- 229910000399 iron(III) phosphate Inorganic materials 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- 230000037007 arousal Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000013404 process transfer Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention discloses a kind of infrared explosion-proof manual operator with USB interface, including single-chip microcomputer, data storage, USB interface and power supply circuits, Modbus/IrPHY telecommunication circuit and for realizing capacitance touch button circuit and the LCD display circuit of man machine interface, described USB interface is connected with single-chip microcomputer respectively with power supply circuits, Modbus/IrPHY telecommunication circuit, capacitance touch button circuit and LCD display circuit, described single-chip microcomputer, data storage and peripheral circuit composition single-chip microcomputer and data memory module.Manual operator of the present invention can eliminate mechanical key and produce pyrophoric probability during button, the communication protocol realization that employing IrPHY physical layer combines with Modbus application layer communicates with instrument and meter for automation, simplify infrared communication protocol, can be communicated with PC by USB interface, and to lithium cell charging, and internal circuit is low-power consumption and substantial safety-design.
Description
Technical field
The present invention relates to a kind of manual operator, a kind of infrared explosion-proof manual operator with USB interface, belong to automatic
Change hands behaviour's technical field of instrument.
Background technology
Manual operator is a manual operating unit of instrument and meter for automation, the instrument being mainly used in arranging without manual parameters
With the use of, it is achieved the reading of instrumented data and the configuration of functional parameter.Manual operator and the communication mode of instrument and meter for automation
Having wired mode and wireless mode, the most frequently used wired manual operator of industrial instrument is HART manual operator, but it is not only
Cable is needed to connect, and expensive；Communication has infrared and RF mode, although infrared communication hardware becomes
This is low, but IrDA communication protocol is complicated, takies mcu resource more.
For the manual operator used lower in inflammable and explosive environment, need to carry out Explosion-proof Design, although existing manual operator
Carry out technological processing for explosion protection feature, but there is also conventional keys and be easily generated the potential safety hazards such as spark when operation.Along with USB leads to
Popularizing and popular of letter interface, it is desirable to manual operator has USB interface, and has charge function；Also require that manual operator has
The man machine interface having close friend is connected with instrument and meter for automation can use reliable and cheap over the horizon communication system.
Summary of the invention
The invention aims to solve the defect of above-mentioned prior art, it is provided that a kind of simple in construction, communication mode can
Lean on and cheap, and the infrared explosion-proof manual operator with USB interface that safety is high.
The purpose of the present invention can reach by adopting the following technical scheme that:
There is the infrared explosion-proof manual operator of USB interface, it is characterised in that: include single-chip microcomputer, data storage, USB
Interface and power supply circuits, Modbus/IrPHY telecommunication circuit and for realizing the capacitance touch button circuit of man machine interface
With LCD display circuit, described USB interface is pressed with power supply circuits, Modbus/IrPHY telecommunication circuit, capacitance touch
Key circuit is connected with single-chip microcomputer respectively with LCD display circuit, described single-chip microcomputer, data storage and peripheral circuit composition
Single-chip microcomputer and data memory module.
As a kind of preferred version, described USB interface and power supply circuits include that usb socket, ESD protect electricity
Road, voltage conversion and charging control circuit, LED charging indication and lithium battery, described usb socket
USB wire is after esd protection circuit, and the holding wire of this USB wire connects single-chip microcomputer by build-out resistor
USB_DM pin and USB_DP pin, the power line of this USB wire connects voltage conversion and charging control circuit,
The conversion of described voltage is divided into two-way with charging control circuit, and a road is DC/DC change-over circuit, and another road controls for charging
Circuit, the output of described charging control circuit is as the charging voltage of lithium battery, the output of described DC/DC change-over circuit
Output with lithium battery is connected VDD by diode, and described LED charging indication connects voltage conversion and charging
Control circuit.
As a kind of preferred version, the conversion of described voltage uses LTC4098-3.6 chip with charging control circuit.
As a kind of preferred version, described lithium battery uses ferric phosphate lithium cell, and its battery capacity is 200mAh, battery
Having NTC thermo-sensitive resistor in bag, the outfan of battery is provided with resettable fuse.
As a kind of preferred version, described Modbus/IrPHY telecommunication circuit is by single-chip microcomputer On-Chip peripheral UART, IrDA
Transceiver and interlock circuit composition, described UART with IrDA transceiver is connected.
As a kind of preferred version, described IrDA transceiver uses TFDU4101 transceiver.
As a kind of preferred version, described capacitance touch button circuit includes 10 capacitance touch buttons, described each electricity
Hold touch key-press to be connected with the I/O port of single-chip microcomputer respectively.
As a kind of preferred version, described each capacitance touch button uses the circular pad of 10mm diameter on pcb board,
The organic film that surface-coated 0.5mm is thick, the periphery of described circular pad is intervally distributed with 0.5mm screen layer.
As a kind of preferred version, described LCD display circuit is by 128 × 64 black and white LCD display LM6059BCW
And interlock circuit composition, this LCD display, with LED-backlit, is connected with the I/O port of single-chip microcomputer.
As a kind of preferred version, described single-chip microcomputer uses the STM32L151VBT6 chip of STM32 series, described
Data storage uses flash storage AT25DF041A.
The present invention has a following beneficial effect relative to prior art:
1, manual operator of the present invention uses the man machine interface similar to mobile phone, and man machine interface has capacitance touch button and LCD
Display screen, it is simple to user operation, wherein capacitance touch button can eliminate standard machinery button and produces during button
The probability of spark, simultaneously because capacitance touch button completes on pcb board, it is not necessary to the activity of mechanical key
Space, it is possible to achieve the complete encapsulation of circuit.
2, the Modbus/IrPHY telecommunication circuit in manual operator of the present invention uses IrPHY physical layer and Modbus application
The communication protocol that layer combines, to realize the communication with instrument and meter for automation (such as transmitter etc.), simplifies infrared communication
Agreement.
3, manual operator of the present invention has USB interface, both can pass through to communicate between USB interface and PC,
Can also be by USB interface to lithium cell charging, simultaneously because lithium battery uses ferric phosphate lithium cell, it is possible to achieve temperature
Spend too high or too low charge protection and overcurrent protection.
4, the internal circuit of manual operator of the present invention is low-power consumption and substantial safety-design, have explosion-proof (essential safety+
Flame proof) function, improve safety and stand-by time.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of manual operator of the present invention.
Fig. 2 is the communication protocol stack schematic diagram that manual operator of the present invention uses.
Fig. 3 is the man machine interface schematic diagram of manual operator of the present invention.
Fig. 4 is USB interface and the power supply circuit construction schematic diagram of manual operator of the present invention.
Fig. 5 a is the main flow schematic diagram of manual operator of the present invention.
Fig. 5 b is that the RTC of manual operator of the present invention interrupts schematic flow sheet.
Detailed description of the invention
Embodiment 1:
As it is shown in figure 1, the manual operator of the present embodiment include single-chip microcomputer and data memory module M101, USB interface with
Power supply circuits M102, capacitance touch button circuit M103, LCD display circuit 104 communicate with Modbus/IrPHY
Circuit 105；Described single-chip microcomputer and data memory module M101 are by low-power scm STM32L151VBT6, Flash
Memorizer AT25DF041A and peripheral circuit composition, the EEPROM of the internal 4KB of described single-chip microcomputer is used for storing hands
Behaviour's device and corresponding instrument and meter for automation running parameter data, the 512KB of outside flash storage AT25DB04lA is empty
Between be divided into two parts, the 272KB of low address for storage 16 dot matrix Chinese word libraries, the 240KB of high address is used for depositing
Store up the data read in from instrument and meter for automation.
As depicted in figs. 1 and 2, described Modbus/IrPHY telecommunication circuit 105 is by single-chip microcomputer On-Chip peripheral UART
(Universal Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter), IrDA transceiver
TFDU4101 and interlock circuit composition, described UART with IrDA transceiver is connected, it is achieved with leading to of instrument and meter for automation
Letter, in order to simplify infrared communication protocol, uses Modbus as application layer M201 and IrPHY as physical layer M202
Communication protocol, Modbus use Modbus-ASCII mode communicate, to simplify the synchronization of packet start byte.
As shown in figures 1 and 3, realize for described capacitance touch button circuit M103 and LCD display circuit M104
Man machine interface, the operation of man machine interface is similar to mobile phone, and described capacitance touch button circuit M103 includes 10 electricity
Holding touch key-press, be connected with the I/O port of single-chip microcomputer respectively, each capacitance touch button uses 10mm on pcb board
The circular pad of diameter, the organic film that surface-coated 0.5mm is thick, the periphery of described circular pad is intervally distributed with
0.5mm screen layer；Described LCD display circuit M104 by 128 × 64 black and white LCD display LM6059BCW and
Interlock circuit forms, and this LCD display, with LED-backlit, is connected with the I/O port of single-chip microcomputer, LED-backlit
Brightness by single-chip microcomputer use PWM mode regulate；All capacitance touch buttons all use electric charge branch mode to work,
In order to improve key scan speed, 10 capacitance touch buttons are divided into 4 groups, be respectively Groupl be " On/Off "
Key, Group2 is " BackLight-" key, " IrCom " key and " Enter " key, and Group3 is " BackLight+ "
Key, " Down " key and " Left " key, Group4 is " Up " key, " Right " key and " Return " key, 4 groups
Button parallel scan simultaneously, in order to prevent the impact on recognition by pressing keys sensitivity of the electric capacity long term drift, at each manual operator
When carrying out USB charging, if capacitive calibration time interval was more than 1 day, then carry out during non-tactile capacitance from dynamic(al) correction,
And point out on LCD display, the most not touch key-press；LCD display is 128 × 64 white and black displays,
Using the Chinese character of 16 × 16 dot matrix and the numeral of 16 × 8 dot matrix and letter display, have 4 row, the 1st row is divided into 4
Territory, show date respectively, the time, usb communication state and Ir infrared communication state；2nd row is divided into 3 territories, point
(on the right of expression, do not also has menu function for less than sign (represent the left side also have menu function item), menu function, greater-than sign
), browsed by " Left " key and " Right " key, confirmed by " Enter " key；3rd row and
2 row equally become 3 territories, respectively less than sign (representing that the left side also has operating variable item), operating variable, greater-than sign (table
Show that the right also has operating variable item), browsed by " Left " key and " Right " key, entered by " Enter " key
Row confirms, returns the 2nd row by " Return " key and operates；4th row only has 1 territory, is used for showing operating variable value,
Modified by " Up " key and " Down " key, confirmed by " Enter " key, by " Return " key
Return the 3rd row operation, if desired carry out relevant parameter reading from instrument and meter for automation and writing, then press " IrCom " key,
The regulation of LCD backlight is by " BackLight+ " key and BackLight-" key completes.
As shown in Figure 1 and Figure 4, described USB interface and power supply circuits M102 include usb socket M401,
The conversion of ESD (Electro-Static discharge, Electro-static Driven Comb) protection circuit M402, voltage and charging control circuit
M403, LED charging indication M404 and ferric phosphate lithium cell M405, when usb socket M401 leads to
Cross USB data line when being connected with PC, manual operator not in inflammable and explosive environment, usb socket M401
USB wire after esd protection circuit M402, the holding wire of this USB wire is through the build-out resistor of 22 Ω
Connect the USB_DM pin of single-chip microcomputer and USB_DP pin, the power line of this USB wire connect voltage conversion and
It is divided into two-way, after DC/DC change-over circuit of leading up to becomes the voltage of Vbat+0.4V after charging control circuit M403
Connecting VDD through diode, as the running voltage of the remainders such as single-chip microcomputer, wherein Vbat is the electricity of rechargeable battery
Pressure, separately leads up to after charging control circuit the charging voltage as ferric phosphate lithium cell M405；Described voltage is changed
Use LTC4098-3.6 chip with charging control circuit M403, there is input voltage overvoltage protection and chip overtemperature prote；
The capacity of described ferric phosphate lithium cell M405 is 200mAh, has NTC thermo-sensitive resistor in battery bag, it is achieved battery temperature
Spending high and too low charge protection, the outfan of battery is provided with resettable fuse simultaneously, it is achieved overcurrent protection；Institute
The output of the output and the DC/DC change-over circuit of LTC4098-3.6 of stating ferric phosphate lithium cell M405 carries on the back " line by two poles
Or " backward VDD powers；Described LED charging indication M404 connects LTC4098-3.6, to point out user；
In addition to the metal External connecting part of usb socket M401, remaining circuit all with pcb board by together with encapsulation.
As shown in Figure 5 a, for the manual operator main flow of the present embodiment, specific as follows:
Step500: manual operator powers on, single-chip microcomputer starts, and enters Step501；
Step501: initialize I/O port, buffer memory and On-Chip peripheral, including USB, UART, connection electric capacity
The initialization of the I/O port etc. of the I/O port of touch key-press and connection LCD display, then arranges MainState
It is 1, represents and be now in Active pattern, finally carry out RTC and initialize and 1 second timer interrupt, enter circulation；
Step502: carry out MainState condition adjudgement, if MainState state is 0, then it represents that now for low-power consumption
Sleep pattern, enters Step508；If MainState state is 1, then enter Step503；
Step503: scan whole button, enters Step504；
Step504: judge whether that long-time (this time can set, and defaults to 20 seconds) without button, the most then enters
Step507；If it is not, then enter Step505；
Step505: judge whether that length presses On/Off key, the most then enter Step507；If it is not, then enter Step506；
Step506: complete the process of other button, communicates with Modbus/IrPHY including display, usb communication；
Step507: arrange MainState=0, turns off LED-backlit and LCD, and enters Step508；
Step508: time out program runs, and enters low-power consumption Sleep pattern, and waits waking up up of RTC interrupt routine.
Owing to the manual operator of the present embodiment has explosion prevention function, I/O is not used to interrupt arousal function as mobile phone
Button, needs to use RTC in single chip microcomputer to interrupt waking up up, as shown in Figure 5 b, for the manual operator RTC of the present embodiment
Interrupt flow process, specific as follows:
Step511: interrupt entering this step, the simultaneously self-clocking of RTC hardware by RTC, enter Step512；
Step512: carry out time and date LCD display buffer and update, enter Step513；
Step513: carry out MainState judgement, if MainState state is 0, then enters Step514；If MainState
State is 1, then enter Step517；
Step514: carry out On/Off key scanning, obtains present scan result, enters Step515；
Step515: carry out double button and compare, if double key assignments is all On/Off key assignments (identical), then
It is judged as long On/Off key of pressing, entrance Step516；If double key assignments is different, then enter Step517；
Step516: realize single-chip microcomputer state transfer, including arrange MainState be 1, open LED-backlit and LCD,
Remove On/Off buffer key assignments etc.；
Step517: complete RTC and interrupt returning.
By above-mentioned flow process, the manual operator of the present embodiment is at main flow and interrupts realizing duty at Active between flow process
Transfer between pattern and low-power consumption Sleep pattern.
In sum, manual operator of the present invention can eliminate mechanical key and produce pyrophoric probability during button, letter
Change infrared communication protocol, can have been communicated with PC by USB interface, and to lithium cell charging, and interior
Portion's circuit is low-power consumption and substantial safety-design.
The above, patent preferred embodiment the most of the present invention, but the protection domain of patent of the present invention is not limited to
This, any those familiar with the art is in the scope disclosed in patent of the present invention, according to patent of the present invention
Technical scheme and patent of invention conceive equivalent or change in addition, broadly fall into the protection domain of patent of the present invention.
Claims (10)
1. there is the infrared explosion-proof manual operator of USB interface, it is characterised in that: include single-chip microcomputer, data storage,
USB interface and power supply circuits, Modbus/IrPHY telecommunication circuit and for realizing the capacitance touch button of man machine interface
Circuit and LCD display circuit, described USB interface and power supply circuits, Modbus/IrPHY telecommunication circuit, capacitive touch
Touch key circuit to be connected with single-chip microcomputer respectively with LCD display circuit, described single-chip microcomputer, data storage and peripheral circuit
Composition single-chip microcomputer and data memory module；Described Modbus/IrPHY telecommunication circuit use Modbus as application layer and
IrPHY is as the communication protocol of physical layer, and Modbus uses Modbus-ASCII mode to communicate.
The infrared explosion-proof manual operator with USB interface the most according to claim 1, it is characterised in that: described
USB interface and power supply circuits include the conversion of usb socket, esd protection circuit, voltage and charging control circuit,
LED charging indication and lithium battery, the USB wire of described usb socket after esd protection circuit,
The holding wire of this USB wire connects USB_DM pin and the USB_DP pin of single-chip microcomputer by build-out resistor, should
The power line of USB wire connects voltage conversion and charging control circuit, and the conversion of described voltage is divided into charging control circuit
Two-way, a road is DC/DC change-over circuit, and another road is charging control circuit, and the output of described charging control circuit is made
For the charging voltage of lithium battery, the described output of DC/DC change-over circuit is connected by diode with the output of lithium battery
VDD, described LED charging indication connects voltage conversion and charging control circuit.
The infrared explosion-proof manual operator with USB interface the most according to claim 2, it is characterised in that: described
Voltage conversion uses LTC4098-3.6 chip with charging control circuit.
The infrared explosion-proof manual operator with USB interface the most according to claim 2, it is characterised in that: described
Lithium battery uses ferric phosphate lithium cell, and its battery capacity is 200mAh, has NTC thermo-sensitive resistor, battery in battery bag
Outfan be provided with resettable fuse.
The infrared explosion-proof manual operator with USB interface the most according to claim 1, it is characterised in that: described
Modbus/IrPHY telecommunication circuit is made up of single-chip microcomputer On-Chip peripheral UART, IrDA transceiver and interlock circuit, described
UART with IrDA transceiver is connected.
The infrared explosion-proof manual operator with USB interface the most according to claim 5, it is characterised in that: described
IrDA transceiver uses TFDU4101 transceiver.
The infrared explosion-proof manual operator with USB interface the most according to claim 1, it is characterised in that: described
Capacitance touch button circuit includes 10 capacitance touch buttons, described each capacitance touch button respectively with the I/O of single-chip microcomputer
Port connects.
The infrared explosion-proof manual operator with USB interface the most according to claim 7, it is characterised in that: described
Each capacitance touch button uses the circular pad of 10mm diameter on pcb board, thick organic thin of surface-coated 0.5mm
Film, the periphery of described circular pad is intervally distributed with 0.5mm screen layer.
The infrared explosion-proof manual operator with USB interface the most according to claim 1, it is characterised in that: described
LCD display circuit is made up of 128 × 64 black and white LCD display LM6059BCW and interlock circuit, and this LCD shows
Display screen, with LED-backlit, is connected with the I/O port of single-chip microcomputer.
The infrared explosion-proof manual operator with USB interface the most according to claim 1, it is characterised in that: described
Single-chip microcomputer uses the STM32L151VBT6 chip of STM32 series, and described data storage uses flash storage
AT25DF041A。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117551.6A CN103901801B (en) | 2014-03-26 | 2014-03-26 | There is the infrared explosion-proof manual operator of USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117551.6A CN103901801B (en) | 2014-03-26 | 2014-03-26 | There is the infrared explosion-proof manual operator of USB interface |
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| Publication Number | Publication Date |
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| CN103901801A CN103901801A (en) | 2014-07-02 |
| CN103901801B true CN103901801B (en) | 2016-10-05 |
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| CN201410117551.6A Expired - Fee Related CN103901801B (en) | 2014-03-26 | 2014-03-26 | There is the infrared explosion-proof manual operator of USB interface |
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| CN109728987A (en) * | 2019-01-07 | 2019-05-07 | 上海自动化仪表有限公司 | Modbus hand suitable for steam turbine special equipment grasps device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090164951A1 (en) * | 2007-12-19 | 2009-06-25 | Nvidia Corporation | Input architecture for devices with small input areas and executing multiple applications |
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2014
- 2014-03-26 CN CN201410117551.6A patent/CN103901801B/en not_active Expired - Fee Related
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|---|---|---|---|---|
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| CN101042618A (en) * | 2007-04-30 | 2007-09-26 | 李明 | Touching external connection keyboard |
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