CN107272915B - Intelligent intrinsic safety communication keyboard device - Google Patents
Intelligent intrinsic safety communication keyboard device Download PDFInfo
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- CN107272915B CN107272915B CN201710467414.9A CN201710467414A CN107272915B CN 107272915 B CN107272915 B CN 107272915B CN 201710467414 A CN201710467414 A CN 201710467414A CN 107272915 B CN107272915 B CN 107272915B
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- intrinsic safety
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- 238000004891 communication Methods 0.000 title claims abstract description 24
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 239000013078 crystal Substances 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000003993 interaction Effects 0.000 description 6
- 238000005065 mining Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
- G06F3/0219—Special purpose keyboards
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Programmable Controllers (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
An intelligent intrinsically safe communication keyboard device, which is characterized in that: the intelligent intrinsically safe communication keyboard device comprises a machine core, a button panel, a rear cover plate and an open bracket; wherein: the machine core comprises a power supply part, a singlechip minimum system, a keyboard circuit, a 485 isolation and status indication circuit; the core is installed between button panel and back shroud, and open support installs below the back shroud. The invention has the advantages that: after the switches are directly grounded with the device, each switch can be directly connected with the device, the device can isolate the collected switching value through an optical coupler when in operation, switch data are transmitted to a remote PLC in a two-wire mode, more IO modules of the PLC are not required to be expanded, a large number of wires are not required to be connected, a large amount of space is saved for the box body due to the fact that the optical coupler switching value isolating plate is not required, and only two signal wires can be in key communication with a main station, the number of keys can be expanded, the system stability is improved, and the maintenance is easy.
Description
Technical Field
The invention relates to the field of industrial man-machine interaction equipment, in particular to an intelligent intrinsically safe communication keyboard device.
Background
At present, most industrial DCS systems such as pipe-jacking tunneling machines, shield machines and the like are connected with IO ports of PLCs in the systems directly through optical coupling isolation by adopting touch screens or keys. In many cases, the man-machine interaction operation window is far away from the PLC, if the key is accessed to the PLC and is an intrinsic safety signal, an optical coupling isolation plate is needed to be added again to convert the intrinsic safety signal into a non-safety switching value signal, and then the non-safety switching value signal is connected with the PLC, so that the wiring quantity is extremely large, and a large number of equipment fault points are increased. When the working condition environment is severe, the touch screen is difficult to carry out flexible man-machine interaction operation under the condition that oil stain dust is stained by hands, so that hidden danger is brought to safety; each key of the mode that button and PLC are connected with PLC through this ampere of safe division board all needs a very long cable to be connected with PLC far away, needs to be connected to the opto-coupler division board earlier and then be connected with PLC's IO mouth, and its problem such as circuit quantity is big, broken string, virtual even often appear, causes various wiring hidden danger easily and test, trade line etc. all bring very big inconvenience for safety in production. Because the keys are more, IO modules of a plurality of PLCs need to be expanded, so that the equipment cost is increased.
Disclosure of Invention
The invention aims to overcome the problems and particularly provides an intelligent intrinsically safe communication keyboard device.
The invention provides an intelligent intrinsically safe communication keyboard device, which is characterized in that: the intelligent intrinsically safe communication keyboard device comprises a machine core 1, a button panel 2, a rear cover plate 3 and an open bracket 4;
wherein: the movement 1 comprises a power supply part, a singlechip minimum system, a keyboard circuit, a 485 isolation and status indication circuit; the movement 1 is mounted between the button panel 2 and the back plate 3, and the open bracket 4 is mounted below the back plate 3.
The power supply part in the movement 1 is characterized in that an 18V power supply of an intrinsic safety power supply is used for converting an input power supply voltage into 5V and 3.3V voltages required by a singlechip and a chip through a recoverable fuse, a TVS transient suppression diode and a voltage reduction chip, and simultaneously, the isolated 5V and 3.3V voltage levels are converted through an isolation voltage module to be used for supplying power to an optocoupler isolation circuit and an isolated output circuit, so that An Feian isolation is realized.
The singlechip minimum system comprises a crystal oscillator circuit, a reset circuit, a simulation downloading circuit and an MCU core, and a core control area of the whole product is completed;
The keyboard circuit comprises three parts, namely a key indication part, a port pull-up and pull-down part and a key shake elimination part, wherein after the multi-key and the device are grounded together, another pin is respectively led out of one wire to be connected with an input port of the device;
485 and a state indicating circuit, the key information of the intrinsic safety key value is converted into two-line serial port data to be transmitted to the PLC after the key information is isolated by an optical coupler through a MODBUS protocol through a serial port of the singlechip, thereby realizing the communication mode transmission of the key value of the singlechip and the PLC.
According to the actual situation, the device can be used as a master machine or a slave machine. The IO port of the minimum system of the singlechip is connected with the key keyboard terminal and the indicating circuit, and the UART port of the minimum system of the singlechip is connected with the intrinsic safety side of the 485 isolating circuit. The 5V and 3.3V of the power supply part after isolation mainly supply power to the 485 circuit part after isolation.
For DCS distributed control systems such as mining and non-mining pipe-jacking heading machines, shield machines and the like, a large number of keys are often used during man-machine interaction, the design of the device is to improve the reliability of the system, reduce fault hidden dangers caused by connecting lines between keyboard buttons and a PLC and multiple paths of optical coupler isolating switches, and reduce the number of IO module expansion of the PLC, so that the system working abnormality caused by line aging, breakage and virtual connection is reduced, and the working efficiency and maintenance speed of the whole system are improved.
The invention has the advantages that:
The traditional connection method is saved, when each switch is connected with the PLC, a long section of cable is firstly isolated by an optical coupler and then is connected with the port of the PLC, when the switching value is more, a large number of optical couplers and cables are needed, the number of wiring terminals is very large, the number of wiring fault points is very large, and the PLC needs to expand a plurality of groups of IO port modules to meet the requirement, so that the cost is very high. The problems of disconnection, virtual connection and the like are often brought, and the search is inconvenient. After the design of the device directly grounds a plurality of switches and the device together, each switch can be directly connected with the device, the device can isolate the collected switching value through an optical coupler when in operation, switch data are transmitted to a remote PLC in a two-wire mode, more IO modules of the PLC are not required to be expanded, a large number of wires are not required to be connected, a large amount of space is saved for the box body due to the fact that an optical coupler switching value isolating plate is not required, key communication can be carried out between two signal wires and a main station, the number of keys can be expanded, the stability of the system is improved, and the system is easy to overhaul.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a top view of an intelligent intrinsically safe communications keyboard assembly;
fig. 2 is a front view of the smart intrinsically safe communication keyboard assembly.
Detailed Description
Example 1
The embodiment provides an intelligent intrinsically safe communication keyboard device, which is characterized in that: the intelligent intrinsically safe communication keyboard device comprises a machine core 1, a button panel 2, a rear cover plate 3 and an open bracket 4;
wherein: the movement 1 comprises a power supply part, a singlechip minimum system, a keyboard circuit, a 485 isolation and status indication circuit; the movement 1 is mounted between the button panel 2 and the back plate 3, and the open bracket 4 is mounted below the back plate 3.
The power supply part in the movement 1 is characterized in that an 18V power supply of an intrinsic safety power supply is used for converting an input power supply voltage into 5V and 3.3V voltages required by a singlechip and a chip through a recoverable fuse, a TVS transient suppression diode and a voltage reduction chip, and simultaneously, the isolated 5V and 3.3V voltage levels are converted through an isolation voltage module to be used for supplying power to an optocoupler isolation circuit and an isolated output circuit, so that An Feian isolation is realized.
The singlechip minimum system comprises a crystal oscillator circuit, a reset circuit, a simulation downloading circuit and an MCU core, and a core control area of the whole product is completed;
The keyboard circuit comprises three parts, namely a key indication part, a port pull-up and pull-down part and a key shake elimination part, wherein after the multi-key and the device are grounded together, another pin is respectively led out of one wire to be connected with an input port of the device;
485 and a state indicating circuit, the key information of the intrinsic safety key value is converted into two-line serial port data to be transmitted to the PLC after the key information is isolated by an optical coupler through a MODBUS protocol through a serial port of the singlechip, thereby realizing the communication mode transmission of the key value of the singlechip and the PLC.
According to the actual situation, the device can be used as a master machine or a slave machine. The IO port of the minimum system of the singlechip is connected with the key keyboard terminal and the indicating circuit, and the UART port of the minimum system of the singlechip is connected with the intrinsic safety side of the 485 isolating circuit. The 5V and 3.3V of the power supply part after isolation mainly supply power to the 485 circuit part after isolation.
For DCS distributed control systems such as mining and non-mining pipe-jacking heading machines, shield machines and the like, a large number of keys are often used during man-machine interaction, the design of the device is to improve the reliability of the system, reduce fault hidden dangers caused by connecting lines between keyboard buttons and a PLC and multiple paths of optical coupler isolating switches, and reduce the number of IO module expansion of the PLC, so that the system working abnormality caused by line aging, breakage and virtual connection is reduced, and the working efficiency and maintenance speed of the whole system are improved.
Example 2
The embodiment provides an intelligent intrinsically safe communication keyboard device, which is characterized in that: the intelligent intrinsically safe communication keyboard device comprises a machine core 1, a button panel 2, a rear cover plate 3 and an open bracket 4;
wherein: the movement 1 comprises a power supply part, a singlechip minimum system, a keyboard circuit, a 485 isolation and status indication circuit; the movement 1 is mounted between the button panel 2 and the back plate 3, and the open bracket 4 is mounted below the back plate 3.
The power supply part in the movement 1 is characterized in that an 18V power supply of an intrinsic safety power supply is used for converting an input power supply voltage into 5V and 3.3V voltages required by a singlechip and a chip through a recoverable fuse, a TVS transient suppression diode and a voltage reduction chip, and simultaneously, the isolated 5V and 3.3V voltage levels are converted through an isolation voltage module to be used for supplying power to an optocoupler isolation circuit and an isolated output circuit, so that An Feian isolation is realized.
The singlechip minimum system comprises a crystal oscillator circuit, a reset circuit, a simulation downloading circuit and an MCU core, and a core control area of the whole product is completed;
485 and a state indicating circuit, the key information of the intrinsic safety key value is converted into two-line serial port data to be transmitted to the PLC after the key information is isolated by an optical coupler through a MODBUS protocol through a serial port of the singlechip, thereby realizing the communication mode transmission of the key value of the singlechip and the PLC.
According to the actual situation, the device can be used as a master machine or a slave machine. The IO port of the minimum system of the singlechip is connected with the key keyboard terminal and the indicating circuit, and the UART port of the minimum system of the singlechip is connected with the intrinsic safety side of the 485 isolating circuit. The 5V and 3.3V of the power supply part after isolation mainly supply power to the 485 circuit part after isolation.
For DCS distributed control systems such as mining and non-mining pipe-jacking heading machines, shield machines and the like, a large number of keys are often used during man-machine interaction, the design of the device is to improve the reliability of the system, reduce fault hidden dangers caused by connecting lines between keyboard buttons and a PLC and multiple paths of optical coupler isolating switches, and reduce the number of IO module expansion of the PLC, so that the system working abnormality caused by line aging, breakage and virtual connection is reduced, and the working efficiency and maintenance speed of the whole system are improved.
Claims (1)
1. An intelligent intrinsically safe communication keyboard device, which is characterized in that: the intelligent intrinsically safe communication keyboard device comprises a machine core (1), a button panel (2), a rear cover plate (3) and an open bracket (4);
Wherein: the movement (1) comprises a power supply part, a singlechip minimum system, a keyboard circuit, a 485 isolation and status indication circuit; the movement (1) is arranged between the button panel (2) and the back cover plate (3), and the open bracket (4) is arranged below the back cover plate (3);
the singlechip minimum system comprises: the device comprises a crystal oscillator circuit, a reset circuit, a simulation downloading circuit and an MCU core;
The keyboard circuit comprises three parts, namely a key indication part, a port pull-up part and a port pull-down part, wherein the key shake elimination part, after a plurality of keys and the intelligent intrinsic safety communication keyboard device are grounded together, one wire is led out from the other pin to be connected with the input port of the intelligent intrinsic safety communication keyboard device;
485 isolation and status indication circuit, which realizes that the intrinsic safety key value is transmitted by adopting MODBUS protocol after passing through the serial port of the singlechip, and then is converted into two-line serial port data to be transmitted to the PLC after being isolated by the optical coupler;
According to actual conditions, the intelligent intrinsic safety communication keyboard device can be used as a host machine and a slave machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467414.9A CN107272915B (en) | 2017-06-20 | 2017-06-20 | Intelligent intrinsic safety communication keyboard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467414.9A CN107272915B (en) | 2017-06-20 | 2017-06-20 | Intelligent intrinsic safety communication keyboard device |
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| Publication Number | Publication Date |
|---|---|
| CN107272915A CN107272915A (en) | 2017-10-20 |
| CN107272915B true CN107272915B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710467414.9A Active CN107272915B (en) | 2017-06-20 | 2017-06-20 | Intelligent intrinsic safety communication keyboard device |
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| Country | Link |
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| CN (1) | CN107272915B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4954923A (en) * | 1988-08-19 | 1990-09-04 | Cooper Industries, Inc. | Intrinsic safety module interface |
| CN203689450U (en) * | 2014-01-10 | 2014-07-02 | 天津华宁电子有限公司 | Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine |
| CN204302684U (en) * | 2014-12-02 | 2015-04-29 | 中国船舶工业系统工程研究院 | A kind of electrical equipment aobvious control case of essential safety |
| CN207008549U (en) * | 2017-06-20 | 2018-02-13 | 煤科集团沈阳研究院有限公司 | A kind of intelligent intrinsic safety communication keypad device |
-
2017
- 2017-06-20 CN CN201710467414.9A patent/CN107272915B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4954923A (en) * | 1988-08-19 | 1990-09-04 | Cooper Industries, Inc. | Intrinsic safety module interface |
| CN203689450U (en) * | 2014-01-10 | 2014-07-02 | 天津华宁电子有限公司 | Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine |
| CN204302684U (en) * | 2014-12-02 | 2015-04-29 | 中国船舶工业系统工程研究院 | A kind of electrical equipment aobvious control case of essential safety |
| CN207008549U (en) * | 2017-06-20 | 2018-02-13 | 煤科集团沈阳研究院有限公司 | A kind of intelligent intrinsic safety communication keypad device |
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| Publication number | Publication date |
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| CN107272915A (en) | 2017-10-20 |
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