CN106648019A - Constant voltage protection serial communication server - Google Patents
Constant voltage protection serial communication server Download PDFInfo
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- CN106648019A CN106648019A CN201611205810.6A CN201611205810A CN106648019A CN 106648019 A CN106648019 A CN 106648019A CN 201611205810 A CN201611205810 A CN 201611205810A CN 106648019 A CN106648019 A CN 106648019A
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- network
- circuit
- serial
- communication server
- constant pressure
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2015—Redundant power supplies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a constant voltage protection serial communication server. The constant voltage protection serial communication server comprises a microprocessor, a redundant power circuit, a constant voltage module, a first network module, a second network module, a serial interface circuit and a serial expansion circuit, wherein the first network module, the second network module and a serial processing circuit are connected with the microprocessor, the serial interface circuit is coupled to the serial expansion circuit, and the redundant power circuit is connected with the microprocessor through the constant voltage module. The constant voltage protection serial communication server overcomes the defects that in the prior art, a serial communication server is liable to signal interference, consequently, communication is interrupted, the service life of equipment is seriously affected, the server cannot work normally due to a power outage and a network outage, and a microprocessor is damaged because the voltage output by a power module is unstable or a voltage value cannot be constant.
Description
Technical field
The present invention relates to serial server field, in particular it relates to constant pressure protection type serial communication server.
Background technology
With the development of technology of Internet of things, during the equipment of more and more bottoms needs to be connected into Ethernet so that data are reached
The heart controls machine room.Simultaneously developing rapidly with electronic technology and network communications technology, data acquisition transmission is gradually applied each
Individual field, permeates in many aspects such as telecommunications, electric power, Industry Controls.In traditional attendance checking system, card system, gate inhibition system
System, POS consumption systems, doctor's safety-protection system and Industry Control, electric power, telecommunications etc. field, serial communication server is extensively applied
Wherein.Serial port networked server is connected to sensor, detector, card reader or other equipment using as interface transmission data.
In short range transmission, serial communication is easily achieved and safeguards these data, and with preferable data transmission performance.But
Under the complex environment of industry spot, serial communication server of the prior art is vulnerable to the interference of signal, causes communication
Interrupt, have a strong impact on the life of equipment, and power-off suspension can cause server cannot normal work, and power module
The spread of voltage or magnitude of voltage of output cannot be constant, damages with causing microprocessor.
Therefore it provides a kind of can effectively protect in use serial interface equipment, it is to avoid earth loop electricity
Accidental damage that environment causes to serial equipment and the damage such as pressure, surge, indirect lightning strike, electrostatic is severe.Additionally can realize
Dual power supply redundancy and dual network redundancy, prevent the impact of power-off or suspension to server, it is ensured that whole system is normally run, and
So that the voltage constant being input in microcontroller, can effectively protect the constant pressure protection type serial communication service of microcontroller
Device is the problem of urgent need to resolve of the present invention.
The content of the invention
For above-mentioned technical problem, the purpose of the present invention is to overcome serial communication server of the prior art to be vulnerable to letter
Number interference, cause communicating interrupt, have a strong impact on the life of equipment, and power-off suspension can cause server normal
Work, and the spread of voltage or magnitude of voltage of power module output cannot be constant, the problem damaged with causing microprocessor, from
And a kind of serial interface equipment that can effectively protect in use is provided, it is to avoid earth loop voltage, surge, sensing
Accidental damage that environment causes to serial equipment and the damage such as thunderbolt, electrostatic is severe.Additionally can realize dual power supply redundancy and
Dual network redundancy, prevents the impact of power-off or suspension to server, it is ensured that whole system is normally run, and so that is input to micro-
Voltage constant in controller, can effectively protect the constant pressure protection type serial communication server of microcontroller.
To achieve these goals, the invention provides a kind of constant pressure protection type serial communication server, the constant pressure guarantor
Shield type serial communication server includes：Microprocessor, redundant power circuits, constant pressure module, first network module, the second network mould
Block, serial interface circuit and serial expanded circuit, the first network module, second mixed-media network modules mixed-media and the serial ports are processed
Circuit is connected respectively with the microprocessor, and serial interface circuit has been also coupled on the serial expanded circuit, the redundancy
Power circuit is connected by the constant pressure module with the microprocessor；The microcontroller is using based on ARM920T cores
S3C2440 chips, and the microcontroller is configured to execution data processing and the control of signal；The serial interface circuit
On be connected with serial interface equipment, and the serial interface circuit be configured to perform between TTL signal and rs 232 serial interface signal phase
Mutually conversion；The serial expanded circuit is configured to extend the quantity of serial interface on the serial interface circuit so that described
Connected by Multi-serial port between serial interface equipment and the microcontroller；The first network module and the second network mould
Block is respectively configured to pack and process the network signal from the network equipment；The redundant power circuits are configured to serial ports
The various assemblies of communication server provide power supply；The constant pressure module is configured to the voltage for exporting the redundant power circuits
A constant voltage is converted into, and is supplied to the microcontroller to work.
Preferably, the constant pressure module adopts lm2574hvn cake cores.
Preferably, the first network module includes：First network process circuit and first network interface circuit；Described
Two mixed-media network modules mixed-medias include：Second network processing circuitry and the second network interface circuit, the first network interface circuit with it is described
Second network interface circuit is respectively configured to be connected with the network equipment, the first network process circuit and second net
Network process circuit is respectively configured to carry out packing process to the network signal from the network equipment.
Preferably, the first network process circuit and second network processing circuitry are respectively adopted DM9000 cores
Piece, the first network interface circuit and second network interface circuit all include network transformer.
Preferably, the serial interface circuit adopts ADM2483BRW cake cores, the serial expanded circuit to adopt
TL16C554 cake cores.
Preferably, the constant pressure protection type serial communication server also includes CPLD control circuits, the CPLD controls electricity
Road is connected with the microcontroller, and the CPLD control circuits are also connected with the serial ports process circuit, the CPLD controls
Circuit adopts EPM570 cake cores, the CPLD control circuits to be configured to keep the stability of each serial communication, prevents each
Interfere with each other between serial ports.
Preferably, the constant pressure protection type serial communication server also include reset circuit, the reset circuit with it is described
Microcontroller is connected, and the reset circuit is configured to ensure that the initialization of the system of the microcontroller.
Preferably, the constant pressure protection type serial communication server also include crystal oscillating circuit, the crystal oscillating circuit with it is described
Microcontroller is connected, and the crystal oscillating circuit is configured to keep the clock signal of system operation.
According to above-mentioned technical problem, the constant pressure protection type serial communication server that the present invention is provided is by using built-in double
Network interface, dual power supply are come the loss that avoids network interface, abnormity of power supply band of discontinuance from, it is ensured that whole system is healthy and operation free of discontinuities.Its
In, the redundant power circuits at least include two power supplys, and B0505S-2W core power modules are used in dual power supply design, when it
In all the way power failure when, another redundant power that automatically switches is powered so that whole system does not have any impact；Double nets
Mouth design utilizes two DM9000 protocol conversion chips, there is provided the unrelated interface of medium is unrelated to connect be provided with supporting dielectric
The home phone line network equipment or other transceivers of interface function, meets IEEE 802.3u specifications, by automatic synchronization function
Configuration will be automatically performed to be adapted to its line bandwidth to greatest extent, and the constant pressure module can effectively by the redundancy
The constant voltage values that the voltage conversion of power circuit output is used into the suitable microcontroller, so as to protect the microcontroller
Device, extends the service life of the microcontroller.Constant pressure protection type serial communication server in the present invention can overcome existing
Serial communication server in technology is vulnerable to the interference of signal, causes communicating interrupt, has a strong impact on the life of equipment, and
And power-off suspension can cause server cannot normal work, and the spread of voltage or magnitude of voltage of power module output cannot be permanent
It is fixed, the problem damaged with causing microprocessor.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the composition of the constant pressure protection type serial communication server of a kind of preferred embodiment middle offer of the present invention
Structure chart.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Such as Fig. 1, the invention provides a kind of constant pressure protection type serial communication server, the constant pressure protection type serial communication
Server includes：Microprocessor, redundant power circuits, constant pressure module, first network module, the second mixed-media network modules mixed-media, serial interface
Circuit and serial expanded circuit, the first network module, second mixed-media network modules mixed-media and the serial ports process circuit respectively with
The microprocessor is connected, and serial interface circuit has been also coupled on the serial expanded circuit, and the redundant power circuits are led to
Cross the constant pressure module to be connected with the microprocessor；The microcontroller is using the S3C2440 cores based on ARM920T cores
Piece, and the microcontroller is configured to execution data processing and the control of signal；It is connected with the serial interface circuit
Serial interface equipment, and the serial interface circuit is configured to mutual conversion between execution TTL signal and rs 232 serial interface signal；Institute
State serial expanded circuit to be configured to extend the quantity of serial interface on the serial interface circuit so that the serial interface sets
It is standby to be connected by Multi-serial port between the microcontroller；The first network module is matched somebody with somebody respectively with second mixed-media network modules mixed-media
It is set to the network signal packed and process from the network equipment；The redundant power circuits are configured to serial communication server
Various assemblies provide power supply；The constant pressure module is configured to the voltage conversion for exporting the redundant power circuits into one
Constant voltage, and it is supplied to the microcontroller to work.
According to above-mentioned technical problem, the constant pressure protection type serial communication server that the present invention is provided is by using built-in double
Network interface, dual power supply are come the loss that avoids network interface, abnormity of power supply band of discontinuance from, it is ensured that whole system is healthy and operation free of discontinuities.Its
In, the redundant power circuits at least include two power supplys, and B0505S-2W core power modules are used in dual power supply design, when it
In all the way power failure when, another redundant power that automatically switches is powered so that whole system does not have any impact；Double nets
Mouth design utilizes two DM9000 protocol conversion chips, there is provided the unrelated interface of medium is unrelated to connect be provided with supporting dielectric
The home phone line network equipment or other transceivers of interface function, meets IEEE 802.3u specifications, by automatic synchronization function
Configuration will be automatically performed to be adapted to its line bandwidth to greatest extent, and the constant pressure module can effectively by the redundancy
The constant voltage values that the voltage conversion of power circuit output is used into the suitable microcontroller, so as to protect the microcontroller
Device, extends the service life of the microcontroller.Constant pressure protection type serial communication server in the present invention can overcome existing
Serial communication server in technology is vulnerable to the interference of signal, causes communicating interrupt, has a strong impact on the life of equipment, and
And power-off suspension can cause server cannot normal work, and the spread of voltage or magnitude of voltage of power module output cannot be permanent
It is fixed, the problem damaged with causing microprocessor.
In the present invention, the constant pressure module is used for the voltage conversion for exporting the redundant power circuits into constant voltage,
In order to coordinate the microcontroller, the present invention it is a kind of preferred embodiment in, the constant pressure module adopts lm2574hvn
Cake core, wherein, the constant pressure module is that input voltage is 7-36 volts, and the output voltage of the constant pressure module is 3.3 volts,
And be defeated by the microcontroller and use, so as to protect the microcontroller.
In a kind of specific embodiment of the present invention, the first network module includes：First network process circuit
With first network interface circuit；Second mixed-media network modules mixed-media includes：Second network processing circuitry and the second network interface circuit, institute
State first network interface circuit to be respectively configured to be connected with the network equipment with second network interface circuit, described first
Network processing circuitry and second network processing circuitry are respectively configured to that the network signal from the network equipment is carried out to beat
Bag process.Wherein, there are redundant associations between the first network module and second mixed-media network modules mixed-media, i.e., one of network
Module is redundant network module, when server occurs in the course of the work the problems such as network interrupts, the normal work of redundant network module
Make, prevent server system from causing the stopping of whole work extremely.
The present invention it is a kind of preferred embodiment in, the first network process circuit and second network processes
Circuit is respectively adopted DM9000 cake cores, and the first network interface circuit and second network interface circuit all include net
Network transformer.Double network interface designs are ensured between the stable and distinct device of signal transmission by FC1008CLE network transformers
Varying level, serves the effect of isolated high voltage and matching impedance.DM9000 be it is a it is fully-integrated and meet cost effect
The single-chip Fast Ethernet mac controller of benefit.
The present invention it is a kind of preferred embodiment in, the serial interface circuit adopt ADM2483BRW cake cores,
The serial expanded circuit adopts TL16C554 cake cores, the serial expanded circuit that serial ports number is at least expanded to into 2, serial ports
Interface chip adopts ADM2483BRW chips, is to isolate iCoupler technologies based on magnetic coupling (to be adapted to the isolation skill of hyperbaric environment
Art).The ADM2483BRW chips are the transceivers of the enhancement mode with isolation, including triple channel isolator, a band three
The differential driver of state output and a differential receiver with tri-state input.The ADM2483BRW is in power consumption, integrated level, biography
Defeated speed aspect all has good application, at the same meet medical equipment high voltage commercial Application, power supply and other height every
From the strict insulation request of the environment of degree, various industrial applications, including data communication, data conversion are highly suitable for.
The present invention it is a kind of preferred embodiment in, the constant pressure protection type serial communication server also include CPLD
Control circuit, the CPLD control circuits are connected with the microcontroller, the CPLD control circuits and the serial ports expansion
Circuit also connects, and the CPLD control circuits adopt EPM570 cake cores.The CPLD control circuits are configured to keep each
The stability of serial communication, prevents from being interfered with each other between each serial ports.
The present invention it is a kind of preferred embodiment in, the constant pressure protection type serial communication server also include reset
Circuit, the reset circuit is connected with the microcontroller, and the reset circuit is configured to ensure that the microcontroller
The initialization of system, in use, when the constant pressure protection type serial communication server of the present invention make a mistake etc. it is improper
During situation, the reset circuit can be started, so that the system of the microcontroller carries out initialization operation, effectively be arranged
Except improper situation so that user can more easily use the constant pressure protection type serial communication server.
The present invention it is a kind of preferred embodiment in, the constant pressure protection type serial communication server also include crystal oscillator
Circuit, the crystal oscillating circuit is connected with the microcontroller, and the crystal oscillating circuit is connected on the microcontroller, be in order to
The clock signal that holding system is normally run is provided to the microcontroller.The excellent of the present invention is described in detail above in association with accompanying drawing
Embodiment is selected, but, the present invention is not limited to the detail in above-mentioned embodiment, in the range of the technology design of the present invention
It is interior, various simple variants can be carried out to technical scheme, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of embodiments of the present invention, as long as it is without prejudice to this
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (8)
1. a kind of constant pressure protection type serial communication server, it is characterised in that the constant pressure protection type serial communication server bag
Include：Microprocessor, redundant power circuits, constant pressure module, first network module, the second mixed-media network modules mixed-media, serial interface circuit and string
Port expansion circuit, the first network module, second mixed-media network modules mixed-media and the serial ports process circuit respectively with micro- place
Reason device is connected, and serial interface circuit has been also coupled on the serial expanded circuit, and the redundant power circuits are by the perseverance
Die block is connected with the microprocessor；
The microcontroller is configured to perform number using the S3C2440 chips based on ARM920T cores, and the microcontroller
According to process and the control of signal；Serial interface equipment, and the serial interface circuit are connected with the serial interface circuit
It is configured to perform and mutually changes between TTL signal and rs 232 serial interface signal；It is described that the serial expanded circuit is configured to extension
The quantity of serial interface on serial interface circuit so that pass through Multi-serial port between the serial interface equipment and the microcontroller
Connection；The first network module is respectively configured to pack and process the net from the network equipment with second mixed-media network modules mixed-media
Network signal；The redundant power circuits are configured to the various assemblies of serial communication server and provide power supply；The constant pressure mould
Block is configured to the voltage conversion for exporting the redundant power circuits into a constant voltage, and is supplied to the microcontroller
Device works.
2. constant pressure protection type serial communication server according to claim 1, it is characterised in that the constant pressure module is adopted
Lm2574hvn cake cores.
3. constant pressure protection type serial communication server according to claim 1, it is characterised in that the first network module
Including：First network process circuit and first network interface circuit；Second mixed-media network modules mixed-media includes：Second network processing circuitry
With the second network interface circuit, the first network interface circuit is respectively configured to and net with second network interface circuit
Network equipment is connected, and the first network process circuit and second network processing circuitry are respectively configured to carrying out automatic network
The network signal of equipment carries out packing process.
4. constant pressure protection type serial communication server according to claim 3, it is characterised in that the first network is processed
Circuit and second network processing circuitry are respectively adopted DM9000 cake cores, the first network interface circuit and described second
Network interface circuit all includes network transformer.
5. constant pressure protection type serial communication server according to claim 1, it is characterised in that the serial interface circuit
Using ADM2483BRW cake cores, the serial expanded circuit adopts TL16C554 cake cores.
6. constant pressure protection type serial communication server according to claim 1, it is characterised in that the constant pressure protection type string
Mouth communication server also includes CPLD control circuits, and the CPLD control circuits are connected with the microcontroller, the CPLD
Control circuit is also connected with the serial ports process circuit, and the CPLD control circuits adopt EPM570 cake cores, the CPLD controls
Circuit processed is configured to keep the stability of each serial communication, prevents from being interfered with each other between each serial ports.
7. constant pressure protection type serial communication server according to claim 1, it is characterised in that the constant pressure protection type string
Mouth communication server also includes reset circuit, and the reset circuit is connected with the microcontroller, and the reset circuit is matched somebody with somebody
It is set to the initialization of the system for ensureing the microcontroller.
8. constant pressure protection type serial communication server according to claim 7, it is characterised in that the constant pressure protection type string
Mouth communication server also includes crystal oscillating circuit, and the crystal oscillating circuit is connected with the microcontroller, and the crystal oscillating circuit is matched somebody with somebody
It is set to the clock signal for keeping system operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205810.6A CN106648019A (en) | 2016-12-23 | 2016-12-23 | Constant voltage protection serial communication server |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205810.6A CN106648019A (en) | 2016-12-23 | 2016-12-23 | Constant voltage protection serial communication server |
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| CN106648019A true CN106648019A (en) | 2017-05-10 |
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| CN201611205810.6A Pending CN106648019A (en) | 2016-12-23 | 2016-12-23 | Constant voltage protection serial communication server |
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Cited By (11)
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| CN107229314A (en) * | 2017-06-22 | 2017-10-03 | 安徽康海时代科技股份有限公司 | The double net double-serial port servers of RJ45 types |
| CN107239118A (en) * | 2017-06-22 | 2017-10-10 | 安徽康海时代科技股份有限公司 | The serial server of four net of RJ45 types 16 |
| CN107357365A (en) * | 2017-06-22 | 2017-11-17 | 安徽康海时代科技股份有限公司 | The double serial servers of net eight of RJ45 types |
| CN107368157A (en) * | 2017-06-22 | 2017-11-21 | 安徽康海时代科技股份有限公司 | The serial server of double nets eight with terminal |
| CN107369227A (en) * | 2017-06-23 | 2017-11-21 | 芜湖恒天易开软件科技股份有限公司 | Vehicle data uploading system |
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| CN108182159A (en) * | 2017-11-30 | 2018-06-19 | 安徽康海时代科技股份有限公司 | Band 8 mouthfuls of isolated serial port servers of optical fiber |
| CN108197061A (en) * | 2017-11-30 | 2018-06-22 | 安徽康海时代科技股份有限公司 | Band liquid crystal display dual power supply serial server |
| CN108763123A (en) * | 2018-05-18 | 2018-11-06 | 安徽康海时代科技股份有限公司 | Four serial servers with DTU functions |
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| CN109240076A (en) * | 2018-09-11 | 2019-01-18 | 陕西千山航空电子有限责任公司 | A kind of device and method of control driving source remaining output |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107229314A (en) * | 2017-06-22 | 2017-10-03 | 安徽康海时代科技股份有限公司 | The double net double-serial port servers of RJ45 types |
| CN107239118A (en) * | 2017-06-22 | 2017-10-10 | 安徽康海时代科技股份有限公司 | The serial server of four net of RJ45 types 16 |
| CN107357365A (en) * | 2017-06-22 | 2017-11-17 | 安徽康海时代科技股份有限公司 | The double serial servers of net eight of RJ45 types |
| CN107368157A (en) * | 2017-06-22 | 2017-11-21 | 安徽康海时代科技股份有限公司 | The serial server of double nets eight with terminal |
| CN107369227A (en) * | 2017-06-23 | 2017-11-21 | 芜湖恒天易开软件科技股份有限公司 | Vehicle data uploading system |
| CN107919967A (en) * | 2017-11-30 | 2018-04-17 | 安徽康海时代科技股份有限公司 | Band 16 mouthfuls of isolated serial port servers of optical fiber |
| CN108182159A (en) * | 2017-11-30 | 2018-06-19 | 安徽康海时代科技股份有限公司 | Band 8 mouthfuls of isolated serial port servers of optical fiber |
| CN108197061A (en) * | 2017-11-30 | 2018-06-22 | 安徽康海时代科技股份有限公司 | Band liquid crystal display dual power supply serial server |
| CN108763123A (en) * | 2018-05-18 | 2018-11-06 | 安徽康海时代科技股份有限公司 | Four serial servers with DTU functions |
| CN108762411A (en) * | 2018-05-18 | 2018-11-06 | 安徽康海时代科技股份有限公司 | Support six connection four serial servers of session number |
| CN109240076A (en) * | 2018-09-11 | 2019-01-18 | 陕西千山航空电子有限责任公司 | A kind of device and method of control driving source remaining output |
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