CN109413066A - Communication protocol converter of analytical instrument - Google Patents
Communication protocol converter of analytical instrument Download PDFInfo
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- CN109413066A CN109413066A CN201811266082.9A CN201811266082A CN109413066A CN 109413066 A CN109413066 A CN 109413066A CN 201811266082 A CN201811266082 A CN 201811266082A CN 109413066 A CN109413066 A CN 109413066A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
Abstract
The invention relates to the field of analytical instruments, in particular to a communication protocol converter of an analytical instrument. The invention provides an analyzer communication protocol converter. The communication protocol converter can realize the compatibility between the analyzers of a plurality of brands and the sample injectors of a plurality of brands by converting the coding format and the signal level of the output instruction coding signal of the analyzer under the condition of not changing the software and hardware structures of the analyzer and the sample injectors, and has the advantages of saving resources, reducing waste and improving the use efficiency of equipment.
Description
Technical field
The invention belongs to field of analytic instrument, and in particular to a kind of analysis instrument communication protocol converter.
Background technique
Chromatography refers to by substance the difference of distribution coefficient between stationary phase and mobile phase and is separated, analyzed
Method.Chromatography instrument is used to the chromatogram of separate substance and detection, recorded matter, and carries out the instrument of qualitative and quantitative analysis
Device, abbreviation analysis instrument.In experimental analysis, the device for sample being sent into chromatographic column that can be quantified is called sample injector.
Sample injector is divided into two kinds of manually sample injector and autosampler.Autosampler be it is a kind of it is intelligent, from
The sample introduction instrument of dynamicization, when use, need to only connect the communication cable with analysis instrument, be put into sample to be tested, autosampler
The control command that can be issued according to analysis instrument completes automatic sampling process.
But present analysis instrument is divided according to brand, is established one's own system, and is assisted using respectively different control systems and communication
View, since the analysis instrument of different brands and the sample injector of other brands use different communications protocol, communication transfer
Rate and hardware interface design are different from (as shown in table 1,2), this results in the analysis instrument of different brands only in oneself product
It is run in board analysis instrument, therefore the sample injector of different brands analysis instrument cannot be general, user is caused to repeat configuration purchase, wave
Take very big.
Summary of the invention
It is real the technical problem to be solved in the present invention is to provide a kind of technical solution for meeting the conversion of analysis instrument communications protocol
Communications protocol is compatible between the analysis instrument and the sample injector of multiple brands of existing multiple brands.
In view of the above problems, the invention proposes a kind of analysis instrument communication protocol converters.The communications protocol conversion
Device in the case where not changing analysis instrument software and hardware structure, can realize multiple brands analysis instrument and multiple brands into
The effect of compatibility between sample device has and economizes on resources, reduces waste, improve equipment service efficiency.
The communication protocol converter, including input interface adapter, incoming level conversion module, serioparallel exchange module,
Coding inquiry and decoded output module, parallel serial conversion module, output level conversion module and output interface adapter.
The input interface adapter, for connecting the communication interface of different type analysis instrument.
The output interface adapter, for connecting the communication interface of different type sample injector.
The incoming level conversion module, for the encoded signal from the input interface adapter to be converted to TTL
Level coding signal is then output to the serioparallel exchange module；
The serioparallel exchange module, for will be from the serial Transistor-Transistor Logic level encoded signal of the incoming level conversion module
Parallel bus encoded signal is converted to, the coding inquiry and decoded output module are then output in parallel to；
The coding inquiry and decoded output module, believe for that will encode from the parallel bus of the serioparallel exchange module
It number is decoded, parses correct control command, according still further to required Signal coding format, weight is carried out to the control command
It is newly encoded, the parallel bus encoded signal for meeting sample injector use demand is generated, finally simultaneously by the parallel bus encoded signal
Row is output to the parallel serial conversion module；
The parallel serial conversion module is believed for that will encode from the parallel bus of the coding inquiry and decoded output module
Number carry out parallel-serial conversion, then Serial output to the output level conversion module；
The output level conversion module, for will be from the serial Transistor-Transistor Logic level encoded signal of the parallel serial conversion module
The encoded signal for meeting sample injector communication interface level is converted to, the output interface adapter is output to.
Further, the coding inquiry and decoded output module include CPU, and institute will be come from by executing software program by CPU
The parallel bus encoded signal for stating serioparallel exchange module is decoded, and parses correct control command, according still further to required letter
Number coded format, recompiles the control command, generates the parallel bus coding letter for meeting sample injector use demand
Number, the parallel bus encoded signal is finally output in parallel to the parallel serial conversion module.
Further, the CPU model MC68332.
Further, the coding inquiry and decoded output module include F28F008SA memory, for storing analysis instrument
Control command table.
Further, there are three independent channels for the incoming level conversion module, are respectively completed RS485, RS232 and LAN
Conversion of the format signal level to Transistor-Transistor Logic level.
Further, the output and input level conversion module, from MAX485 chip complete RS485 format signal level to
The conversion of Transistor-Transistor Logic level；Conversion of the RS232 format signal level to Transistor-Transistor Logic level is completed from MAX232 chip；It is complete by CH9121 chip
Conversion at from LAN format signal level to Transistor-Transistor Logic level, wherein CH9121 chip is completed at the same time TCP/IP encoded signal to UART
The conversion of encoded signal.
Further, the output level conversion module is there are three independent channel, be respectively completed Transistor-Transistor Logic level to RS485,
The conversion of RS232 and LAN format signal level.
Further, the output level conversion module completes Transistor-Transistor Logic level to RS485 format signal electricity from MAX485 chip
Flat conversion；Conversion of the Transistor-Transistor Logic level to RS232 format signal level is completed from MAX232 chip；TTL is completed by CH9121 chip
Conversion of the level to LAN format signal level, wherein CH9121 chip, which is completed at the same time, encodes UART encoded signal to TCP/IP
The conversion of signal.
Further, the input format conversion module realizes serial UART said shank signal by UART16550 chip
Serioparallel exchange.
Further, the output format conversion module realizes parallel UART said shank signal by UART16550 chip
Parallel-serial conversion.
A kind of analysis instrument communication protocol converter provided by the invention, has the advantages that the communications protocol
Converter changes the coded format and signal level of analysis instrument output control command according to the communication protocol type of sample injector,
The sample injector for making to be only applicable to single analysis instrument originally is suitable for a variety of analysis instruments, can also make can only to control originally it is single into
The analysis instrument of sample device can control a variety of sample injectors, has and economizes on resources, and reduce waste, improve the function of equipment service efficiency
Effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the working principle diagram of analysis instrument communication protocol converter in the embodiment of the present invention；
Fig. 2 is the structural block diagram of analysis instrument communication protocol converter in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
The working principle of analysis instrument communication protocol converter is as shown in Figure 1, for different brands in the embodiment of the present invention
Analysis instrument and sample injector, the communications protocol that communication interface uses be different from, therefore its export control command coding
Format and signal level are all different, therefore in the different situation of communications protocol, the analysis instrument and sample introduction of different brands
Device cannot be compatible with.In Fig. 1, the control command that analysis instrument communication protocol converter exports different brands analyzer is carried out
The conversion of coded format and signal level, output are suitable for the encoded signal of sample injector communication interface.
The circuit structure of analysis instrument communication protocol converter is as shown in Fig. 2, include input interface in the embodiment of the present invention
Adapter, incoming level conversion module, serioparallel exchange module, coding inquiry and decoded output module, parallel serial conversion module, output
Level switch module and output interface adapter.
The input interface adapter and the output interface adapter can be equipped with various communication interfaces.
Communications protocol, transmission communication transmission rate and the hardware interface design of canonical analysis instrument are referring to Tables 1 and 2:
1 different brands analysis instrument communications protocol of table
| Communications protocol | Operating rate | Working method |
| UART(232) | 4.8K | Duplex |
| UART(485) | 2.4K | Half-duplex |
| TCP/IP | 100M | Duplex |
The hardware design that the different communications protocol of table 2 use
| Communications protocol | Physical interface agreement | Physical interface type | Interfaces level | Type of attachment |
| UART(232) | RS232 | KMH24 | ±15V | It is direct-connected |
| UART(485) | RS485 | DB9 | - 8 to+12.5V | It is direct-connected |
| TCP/IP | LAN | RJ45 | 0-5V | It is direct-connected |
Based on the above canonical analysis instrument, tri- kinds of communication terminals of RS485, RS232 and LAN are can be set in input interface adapter
Mouthful, the analysis instrument using tri- kinds of UART (485), UART (232) and TCP/IP communications protocol can be separately connected.
Based on the above canonical analysis instrument, tri- kinds of communication terminals of RS485, RS232 and LAN are can be set in output interface adapter
Mouthful, can be separately connected using UART (485), tri- kinds of communications protocol of UART (232) and TCP/IP three kinds of communications protocol into
Sample device.
It should be noted that needing input interface adapter and output interface adapter that can also be arranged according to Functional Design
More type communication interfaces, the embodiment of the present invention will not enumerate.
The incoming level conversion module can be respectively used to make using chips such as MAX232, MAX485 and CH9121
It is Transistor-Transistor Logic level with the incoming coded signal level conversion of the communications protocol such as UART (485), UART (232) and TCP/IP, wherein
CH9121 chip includes that ICP/IP protocol turns UART protocol function, when completing signal level conversion, completes TCP/IP association together
Discuss conversion of the coded format to UART protocol coded format；
The serioparallel exchange module can use UART16550 chip, the string using UART protocol for that will receive
Row Transistor-Transistor Logic level signal is converted to parallel bus signal and is exported.
The coding inquiry and decoded output module, using 32 high-speed CPU MC68332.The CPU uses M5M5256 high
Fast storehouse temporary storage receives the TTL encoded signal of serioparallel exchange module output, after parsing correct control command, root
According to the meaning of the control command, by retrieving the analysis instrument control command being pre-stored in F28F008SA protocol memories
Table, CPU filter out control command used in analysis instrument corresponding to current sample injector, are led to according still further to by current sample injector
News agreement recompiles control command, is sent to serioparallel exchange module, orders to realize and control different communications protocol
The conversion of order.
For example, currently used is type-A analysis instrument and B type sample injector, type-A analysis instrument exports control command
A, representative, which is meant that, allows sample injector motor to rotate, by retrieving the analysis being pre-stored in F28F008SA protocol memories
Instrument controlling command table learns that B type analysis instrument allows sample injector motor to rotate using control command B, filters out control command B
After, control command B is recompiled according still further to by the communications protocol of B type sample injector, is sent to serioparallel exchange module.
Representative communication assists coded format as shown in table 3:
3 representative communication of table association coding lattice
| Communications protocol | Communications protocol coding |
| UART232 | + 2 bit check code of+16 data encodings of 16 control words |
| UART485 | 8+2 bit check codes of data encoding |
| TCP/IP | 32 control bit data bit+verification shuffling code |
The parallel serial conversion module can use UART16550 chip, for will receive it is using UART protocol and
Row bus signal is converted to serial Transistor-Transistor Logic level signal and is exported.
The output level conversion module, there are three independent channel, the serial TTL that the parallel serial conversion module is exported
Encoded signal level conversion is the level to match with sample injector communication interface.From MAX485 chip complete Transistor-Transistor Logic level to
The conversion of RS485 signal level；Transistor-Transistor Logic level is completed from MAX232 chip to convert to RS232 signal level；It is completed by CH9121 chip
Transistor-Transistor Logic level is to lan signal level conversion, and wherein CH9121 chip includes that UART protocol coded format turns ICP/IP protocol coding lattice
The function of formula completes UART protocol coded format to ICP/IP protocol coded format when completing signal level conversion together
Conversion；
It is as shown in table 4 that typical communication protocol signal level and the present embodiment carry out the chip that level conversion uses:
4 typical communication protocol signal level of table and electrical level transferring chip
| Communications protocol | Interfaces level | Electrical level transferring chip |
| UART(232) | ±15V | MAX232 |
| UART(485) | - 8 to+12.5V | MAX485 |
| TCP/IP | 0-5V | CH9121 |
In use, analysis instrument passes through cable model corresponding with analysis instrument communication protocol converter input port adapter
Port is connected, and sample injector passes through cable model corresponding with analysis instrument communication protocol converter input port adapter port phase
Even, after system electrification, it is automatically performed the conversion of communication protocol.
Analysis instrument communication protocol converter provided in this embodiment meets UART (485), UART (232) and TCP/IP tri-
Further types of communication association may be implemented by extending the upgrading and extension of software and hardware in mutual conversion between kind communications protocol
View is exchanged.
Analysis instrument communication protocol converter provided in this embodiment, is designed using external, can not change analysis
In the case where instrument software and hardware structure, by voltage conversion and coded format convert, realize UART (485), UART (232) and
Mutual conversion between tri- kinds of communications protocol of TCP/IP, so that being realized using the analysis instrument and sample injector of different communications protocol simultaneous
Hold；Built-in CPU is decoded by software realization communications protocol, and retrieval recompiles function, convenient for the upgrading and extension of system, therefore
By increase voltage ALT-CH alternate channel, adaptor interface quantity and software upgrading can increase voltage translation type.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of communication protocol converter, which is characterized in that including input interface adapter, incoming level conversion module,
Serioparallel exchange module, coding inquiry and decoded output module, parallel serial conversion module, output level conversion module and output interface are suitable
Orchestration；
The input interface adapter, for connecting the communication interface of different type analysis instrument；
The output interface adapter, for connecting the communication interface of different type sample injector；
The incoming level conversion module, for the encoded signal from the input interface adapter to be converted to Transistor-Transistor Logic level
Encoded signal is then output to the serioparallel exchange module；
The serioparallel exchange module, for that will be converted from the serial Transistor-Transistor Logic level encoded signal of the incoming level conversion module
For parallel bus encoded signal, it is then output to the coding inquiry and decoded output module；
Coding inquiry and decoded output module, for will the parallel bus encoded signal from the serioparallel exchange module into
Row decoding, parses correct control command, according still further to required Signal coding format, is compiled again to the control command
Code generates the new parallel bus encoded signal for meeting sample injector use demand, and the new parallel bus is encoded letter later
Number it is output in parallel to the parallel serial conversion module；
The parallel serial conversion module is believed for that will encode from the new parallel bus of the coding inquiry and decoded output module
Number carry out parallel-serial conversion, then Serial output to the output level conversion module；
The output level conversion module, for that will be converted from the serial Transistor-Transistor Logic level encoded signal of the parallel serial conversion module
For the encoded signal for meeting sample injector communication interface level, it is output to the output interface adapter.
2. communication protocol converter according to claim 1, which is characterized in that the coding inquiry and decoded output module
Including CPU, software program is executed by CPU and is decoded incoming coded signal, parses correct control command, then to control
Order is recompiled, and the Signal coding format for meeting sample injector use demand is converted to.
3. communication protocol converter according to claim 2, which is characterized in that the CPU model MC68332.
4. communication protocol converter according to claim 2, which is characterized in that the coding inquiry and decoded output module
Including F28F008SA memory, for storing analysis instrument control command table.
5. communication protocol converter according to claim 1, which is characterized in that there are three the incoming level conversion modules
Independent channel is respectively completed conversion of RS485, RS232 and LAN format signal level to Transistor-Transistor Logic level.
6. communication protocol converter according to claim 1, which is characterized in that the output and input level conversion module,
Conversion of the RS485 format signal level to Transistor-Transistor Logic level is completed from MAX485 chip；RS232 format letter is completed by MAX232 chip
Number conversion of the level to Transistor-Transistor Logic level；Conversion of the LAN format signal level to Transistor-Transistor Logic level is completed from CH9121 chip, wherein
CH9121 chip is completed at the same time the conversion by TCP/IP encoded signal to UART encoded signal.
7. communication protocol converter according to claim 1, which is characterized in that there are three the output level conversion modules
Independent channel is respectively completed conversion of the Transistor-Transistor Logic level to RS485, RS232 and LAN format signal level.
8. communication protocol converter according to claim 1, which is characterized in that the output level conversion module, by
MAX485 chip completes conversion of the Transistor-Transistor Logic level to RS485 format signal level；Transistor-Transistor Logic level is completed to RS232 from MAX232 chip
The conversion of format signal level；Conversion of the Transistor-Transistor Logic level to LAN format signal level is completed from CH9121 chip, wherein CH9121
Chip is completed at the same time the conversion by UART encoded signal to TCP/IP encoded signal.
9. communication protocol converter according to claim 1, which is characterized in that the input format conversion module, by
UART16550 chip realizes the serioparallel exchange of serial UART said shank signal.
10. communication protocol converter according to claim 1, which is characterized in that the output format conversion module, by
UART16550 chip realizes the parallel-serial conversion of parallel UART said shank signal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110505200A (en) * | 2019-07-09 | 2019-11-26 | 惠州市亿能电子有限公司 | A kind of multi-protocols daisy chain interface conversion chip |
| CN114417408A (en) * | 2022-01-18 | 2022-04-29 | 百度在线网络技术（北京）有限公司 | Data processing method, device, equipment and storage medium |
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