CN106200502A - A kind of analog input and output device - Google Patents
A kind of analog input and output device Download PDFInfo
- Publication number
- CN106200502A CN106200502A CN201610770374.0A CN201610770374A CN106200502A CN 106200502 A CN106200502 A CN 106200502A CN 201610770374 A CN201610770374 A CN 201610770374A CN 106200502 A CN106200502 A CN 106200502A
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- signal
- output
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- analog input
- output device
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21001—Analog input
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21024—Analog output
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a kind of analog input and output device, the collection of the signals such as pipe pressure, Chai Su, locomotive primary current in cab signal system is provided, and export odometer signal and electric current loop signal actuating speed table and speedometer, and communicated by FLEXRAY, to carry out information mutual with platform host plug-in unit.Its technical scheme is: including: signal acquisition module, including voltage signal acquisition unit, current signal collecting unit and frequency signal collecting unit, is acquired voltage signal, current signal and frequency signal respectively；Output module, including current signal output unit and output of pulse signal unit, output electric current loop drives signal and pulse drive signal respectively；Communication module, communicates for setting up with outside main frame plug-in unit；Digital module, for setting up man-machine interaction with outside computer.
Description
Technical field
The present invention relates to a module in Rail Transit System safety computer platform, particularly relate to the simulation of relevant locomotive
Amount input/output unit.
Background technology
In the traffic control systems such as high-speed railway, there is a kind of fail-safe computer of being referred to as ensureing safe train operation
Nucleus equipment.Fail-safe computer implements controlling in real time and security protection of train operation, it is ensured that train is according to design route
Run in allowed limits with desired speed.For realizing this target, fail-safe computer needs to monitor in real time the operation of train
The operational factors such as speed, current location, train operation instruction, internal system state.Operator or system maintenance commissioning staff
By these operational factors, it is possible to understand system running state and status of equipment in time, and provide follow-up manipulation order with this.
Safety computer platform is built upon on computer technology, communication technology, control technology, meets IEC62425 peace
The distributed network control system of full integrity SIL4 level, has the features such as high reliability, high security, opening, motility,
Mainly comprise following key technology:
1. System security architecture
At present the System security architecture of main flow have two from three, two take advantage of two to take two, the two mixed structure and derivative strucure.Peace
Full framework includes for synchronizing and voting technology, fail-safe technology etc..
The safest I/O technology
Safe I/O technical implementation way is more, but its core concept shows themselves in that the dynamically detection with high coverage rate (is examined
Disconnected), guide after fault and be maintained at safe condition.
3. bussing technique
The motility of this part major embodiment system, extended capability, responding ability, also embody the reliability of system with can
Maintainability.Mainly include several real-time ethernet technology and field bus technique.
4. secure communication protocols
Host-host protocol need to meet IEC62280 standard, but implementation method may be varied.
5. software security techniques
Software security techniques need to use IEC62279 relevant regulations, may use different coding techniques and add secret skill
Art.
6. track signal decoding technique.
Existing simulation template is locomotive speed sensor, diesel engine speed sensor, train tube pressure sensor, electric power
Interface between locomotive primary current transformer, crosspointer speedometer and monitoring host computer plug-in unit, inputs sensor, transformer
Signal delivers to monitoring host computer plug-in unit after processing, send current signal according to the instruction of monitoring host computer plug-in unit simultaneously and drive crosspointer
Speed table, send pulse signal, drive signal drive speedometer.
The simulation plate of template own without cpu system, do not possess signal processing function, there is the phenomenon such as signal fluctuation, precision.
Summary of the invention
The brief overview of one or more aspect given below is to provide the basic comprehension in terms of these.This general introduction is not
The extensive overview of all aspects contemplated, and the key or decisive key element being both not intended to identify all aspects is the most non-
Attempt to define the scope in terms of any or all.Its unique purpose is intended to provide the one of one or more aspect in simplified form
A little concepts think the sequence of more detailed description given later.
It is an object of the invention to solve the problems referred to above, it is provided that a kind of analog input and output device, it is provided that locomotive is believed
The collection of the signal such as pipe pressure, Chai Su, locomotive primary current in number system, and export odometer signal and electric current loop signal drives speed
Degree table and speedometer, is communicated by FLEXRAY, and to carry out information mutual with platform host plug-in unit.
The technical scheme is that and present invention is disclosed a kind of analog input and output device, including:
Signal acquisition module, including voltage signal acquisition unit, current signal collecting unit and frequency signal collecting unit,
Respectively voltage signal, current signal and frequency signal are acquired；
Output module, including current signal output unit and output of pulse signal unit, output electric current loop drives letter respectively
Number and pulse drive signal；
Communication module, communicates for setting up with outside main frame plug-in unit；
Digital module, for setting up man-machine interaction with outside computer.
One embodiment of the analog input and output device according to the present invention, voltage signal acquisition unit includes for directly
Stream voltage signal carries out the amplifier of amplifier adjustment and adjusts circuit, for voltage signal is converted to the voltage/frequency of frequency signal
Changer, for carrying out the optical coupling isolation circuit of light-coupled isolation.
One embodiment of the analog input and output device according to the present invention, current signal collecting unit includes for by straight
Stream current signal is converted into the sample circuit of d. c. voltage signal, for d. c. voltage signal carries out the amplifier tune of amplifier adjustment
Whole circuit, for voltage signal is converted to frequency signal voltage/frequency changer, be used for the optocoupler carrying out light-coupled isolation every
From circuit.
One embodiment of the analog input and output device according to the present invention, frequency signal collecting unit includes for general
Frequency quantity signal input Differential input circuit, for be filtered process filter circuit, for carrying out signal comparison process
Comparator, for carrying out the optical coupling isolation circuit of light-coupled isolation.
One embodiment of the analog input and output device according to the present invention, current signal output unit includes two-way electric current
Signal exports, and is respectively used to drive crosspointer table speed limit and real speed pointer, the output of each of which road current signal all comprise numeral every
From circuit, D/A conversion circuit.
One embodiment of the analog input and output device according to the present invention, output of pulse signal unit exports a road simple venation
The signal of punching, is used for driving speedometer, output of pulse signal unit to include optical coupling isolation circuit, transistor switching circuit.
One embodiment of the analog input and output device according to the present invention, device also includes safety circuit and relay
Group, by relay group control two-way current signal export, output of pulse signal and bus-powered, when simulation plug-in unit detects
After fault or operation exception, automatically cut off external output.
One embodiment of the analog input and output device according to the present invention, analog input and output device is according to outside contrast
The linear difference of the value of portion's input signal and the value of collection record, compensate this linear difference by calculating, it is to avoid because of circuit device
The precision problem that part parameter error causes.
One embodiment of the analog input and output device according to the present invention, communication module uses the FlexRay of dual redundant
Communication bus.
One embodiment of the analog input and output device according to the present invention, analog input and output device uses hardware to join
Put identification technology and encryption technology.
The present invention contrasts prior art following beneficial effect: the analog input and output device of the present invention has as follows
Feature: 1, analog input: six road 0-20mA electric current input collections, two-way 0-10V voltage signal acquisition, three tunnel frequency quantity letters
Number.2, analog output: the output of two-way electric current loop, a road speedometer output of pulse signal.3, hardware configuration identification: there is hardware
This number of plate, hardware plate position identifies.4, the FLEXRAY communication of dual redundant.5, without output protection during fault.6, input Acquisition Error is mended
Repay.
Therefore, it is an advantage of the current invention that: a) use V/F conversion, it is ensured that high-precision signals collecting；B) dual redundant
FlexRay communication bus designs, it is ensured that the reliability of communication；C) hardware configuration identification and encryption technology, truly solve
Plug-in unit misplugs, and improves safety；D) safety is without output, it is ensured that during plant failure, will not export by mistake；E) error compensation, resolver
It is poor that part parameter is known, the precision problem caused, and improves the precision of signals collecting.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the preferred embodiment of the analog input and output device of the present invention.
Fig. 2 shows the schematic diagram of the voltage signal acquisition unit of the present invention.
Fig. 3 shows the schematic diagram of the current signal collecting unit of the present invention.
Fig. 4 shows the schematic diagram of the frequency signal collecting unit of the present invention.
Fig. 5 shows the schematic diagram of the current signal output unit of the present invention.
Fig. 6 shows the schematic diagram of the output of pulse signal unit of the present invention.
Fig. 7 show the present invention for fault without the schematic diagram of circuit of output.
Detailed description of the invention
After reading the detailed description that embodiment of the disclosure in conjunction with the following drawings, it is possible to be more fully understood that the present invention's
Features described above and advantage.In the accompanying drawings, each assembly is not necessarily drawn to scale, and has similar correlation properties or feature
Assembly be likely to be of same or like reference.
Fig. 1 shows the principle of the preferred embodiment of the analog input and output device of the present invention, refers to Fig. 1, this reality
The device executing example includes: signal acquisition module 1, output module 2, communication module 3 and digital module 4.
Communication module 3 use dual redundant FlexRay communication bus (FlexRay be a kind of be applied to automobile high speed, can
Deterministic, possess the bussing technique of failure tolerant ability), be responsible for platform host plug-in unit that to carry out information mutual, will simulate defeated
The situation entering signal feeds back to main frame plug-in unit, the simultaneously instruction of Receiving Host plug-in unit, controls output module 2 output speed and speedometer
Signal.
Signal acquisition module 1 includes that the current signal shown in voltage signal acquisition unit as shown in Figure 2, Fig. 3 is adopted respectively
Collection frequency signal collecting unit shown in unit, Fig. 4.
Voltage signal acquisition unit maximum supports that two-way d. c. voltage signal gathers, and voltage is in the range of 0～10V.Voltage
Signal gathering unit includes that amplifier adjusts circuit, voltage/frequency changer and optical coupling isolation circuit, first passes through amplifier and adjusts, then
After voltage/frequency conversion (V/F conversion) is converted into frequency signal, then by light-coupled isolation, output to CPU is sampled.
Current signal collecting unit maximum supports six road DC current signal collections, input current in the range of 0～20mA,
The sampling way circuit of current signal receiving terminal should be less than 50 Ω.Current signal collecting unit includes that sample circuit, amplifier adjust electricity
Road, voltage/frequency changer, optical coupling isolation circuit.For each road 0～20mA current signal of input, first pass through sampling electricity
Road is converted into d. c. voltage signal, and after amplifier adjusts, output signal is converted into frequency signal through voltage/frequency changer again,
After light-coupled isolation, CPU sampling is delivered to after.AD7740 selected by voltage/frequency changer.
Frequency signal collecting unit maximum supports three tunnel frequency quantity signals collecting, and frequency is 0～5kHz, has a road to support letter
Number peak-peak be 100V, other are the signal of peak value 10V.Frequency signal collecting unit includes Differential input circuit, filtering
Circuit, comparator and optical coupling isolation circuit.Universal frequency amount signal first passes through Differential input circuit, is then filtered processing,
Through the square wave that comparator output is consistent with bavin rotaring signal frequency after filtering, after light-coupled isolation, give CPU sampling.
Output module 2 includes the output of pulse signal unit shown in current signal output unit as shown in Figure 5, Fig. 6.Electricity
Stream signal output unit needs to export two-way current signal, is used for driving crosspointer table speed limit and real speed pointer, range of current output
Being 0～20mA, the maximum value of load resistance is up to 250 Ω.In the two-way current signal output of current signal output unit
Each road all comprises numeral isolation circuit and D/A conversion circuit (such as DAC chip).
After CPU output serial signal is by numeral isolation circuit, then be converted to 0～20mA current signal by DAC chip,
Drive the real speed of crosspointer table and speed limit pointer.DAC chip uses AD420, single channel, 16, serial input, and optional 0～24mA,
0～20mA, 4～20mA outputs.
Output of pulse signal unit exports the signal of a road pulse, and being used for driving speedometer, output pulse amplitude is DC
(24 ± 2) V, pulse width >=200ms.Output of pulse signal unit includes optical coupling isolation circuit and transistor switching circuit, CPU
The pulse signal that output is corresponding, after light-coupled isolation, voltage conversion, drives speedometer.
It is also preferred that the left in addition, when assembly of the invention breaks down, external signal output is excised, including driving
The current signal output of crosspointer table and the output of pulse signal of driving speedometer.As it is shown in fig. 7, use Control two-way electricity
Stream signal output, output of pulse signal and bus-powered.When analog input and output device detects fault or operation exception
After, automatically cut off external output.
It is assembly of the invention when dispatching from the factory debugging that another kind preferably designs, can be according to the value of contrast external input signal
With the linear difference of collection value recording, then compensate this linear difference by calculating, it is to avoid because of circuit devcie parameter error
And the precision problem caused.
In order to increase safety, analog input and output device can also use hardware configuration identification technology and add secret skill
Art.
Generally speaking, the present invention has a following feature:
1) carry digital processing system, preliminary signals process, self monitoring function can be carried out.
2) communication module, uses the FlexRay communication bus of dual redundant.
3) voltage signal and current signal collection, supports maximum 6 road current signals, 2 tunnel voltage signal acquisition, uses V/F
The mode of conversion, is converted to CPU discernible signal, it is achieved high precision collecting by voltage signal.
4) frequency signal collection, maximum 3 road frequency channels of supporting, support 10V or 100V rank, the frequency of 0-5kHz respectively
Signal.
5) fault is without output safety measure.
6) hardware configuration identification, has hardware this number of plate, and hardware plate position identifies.
7) signals collecting Error Compensation Technology, it is possible to resolve the precision problem that device parameters error causes.
Although illustrate for making explanation simplify said method and be described as a series of actions, it should be understood that and understand,
These methods are not limited by the order of action, because according to one or more embodiments, some actions can occur in different order
And/or with from depicted and described herein or the most not shown and describe but it will be appreciated by those skilled in the art that other
Action occurs concomitantly.
Those skilled in the art will further appreciate that, the various illustrative described in conjunction with the embodiments described herein
Logic plate, module, circuit and algorithm steps can be embodied as electronic hardware, computer software or combination of the two.For clearly
Chu ground explains orally this interchangeability of hardware and software, various illustrative components, frame, module, circuit and step be above with
Its functional form makees what vague generalization described.This type of is functional be implemented as hardware or software depends on specifically applying and
Put on the design constraint of total system.Technical staff can realize described by different modes for every kind of application-specific
Functional, but such realize decision-making and should not be interpreted to cause departing from the scope of the present invention.
The various illustrative logic plates, module and the circuit that describe in conjunction with presently disclosed embodiment can use general place
Reason device, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other can compile
Journey logical device, discrete door or transistor logic, discrete nextport hardware component NextPort or its be designed to carry out function described herein
Any combination realizes or performs.General processor can be microprocessor, but in alternative, this processor can be to appoint
Processor, controller, microcontroller or the state machine what is conventional.Processor is also implemented as the combination of calculating equipment, example
One or more microprocessors of cooperating with DSP core with the combination of microprocessor, multi-microprocessor such as DSP or any its
He configures this type of.
The method described in conjunction with embodiment disclosed herein or the step of algorithm can be embodied directly in hardware, in by processor
Embody in the software module performed or in combination of the two.Software module can reside in RAM memory, flash memory, ROM deposit
Reservoir, eprom memory, eeprom memory, depositor, hard disk, removable dish, the appointing of CD-ROM or known in the art
What in the storage medium of his form.Exemplary storage medium is coupled to processor so that this processor can be from/to this storage
Medium reads and write information.In alternative, storage medium can be integrated into processor.Processor and storage medium can
Reside in ASIC.ASIC can reside in user terminal.In alternative, processor and storage medium can be as discrete sets
Part is resident in the user terminal.
In one or more exemplary embodiments, described function can be in hardware, software, firmware or its any combination
Middle realization.If being embodied as computer program in software, the most each function can be as the instruction of one or more bars or generation
Code storage on a computer-readable medium or mat its transmit.Computer-readable medium includes computer-readable storage medium and communicates
Both media, it includes any medium facilitating computer program to shift to another ground from a ground.Storage medium can be can quilt
Any usable medium that computer accesses.Non-limiting as example, such computer-readable medium can include RAM, ROM,
EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage apparatus, maybe can be used to carry or store instruction
Or the desirable program code of data structure form and other medium any that can be accessed by a computer.Any connection is also by by rights
It is referred to as computer-readable medium.Such as, if software is to use coaxial cable, fiber optic cables, twisted-pair feeder, numeral subscriber's line
(DSL) or the most infrared, radio and microwave etc wireless technology from web site, server or other remote source pass
Send, then this coaxial cable, fiber optic cables, twisted-pair feeder, DSL or the most infrared, radio and microwave etc is wireless
Technology is just included among the definition of medium.Dish (disk) and dish (disc) include compact disc as used herein
(CD), laser dish, laser disc, digital versatile dish (DVD), floppy disk and blu-ray disc, its mid-game (disk) often reproduces in the way of magnetic
Data, and dish (disc) reproduces data optically with laser.Combinations of the above also should be included in computer-readable medium
In the range of.
Thering is provided of this disclosure being previously described is for making any person skilled in the art all can make or use these public affairs
Open.Various amendment of this disclosure the most all will be apparent from, and as defined herein general
Suitable principle can be applied to other variants spirit or scope without departing from the disclosure.Thus, the disclosure is not intended to be limited
Due to example described herein and design, but should be awarded and principle disclosed herein and novel features phase one
The widest scope caused.
Claims (10)
1. an analog input and output device, it is characterised in that including:
Signal acquisition module, including voltage signal acquisition unit, current signal collecting unit and frequency signal collecting unit, respectively
Voltage signal, current signal and frequency signal are acquired；
Output module, including current signal output unit and output of pulse signal unit, respectively output electric current loop drive signal and
Pulse drive signal；
Communication module, communicates for setting up with outside main frame plug-in unit；
Digital module, for setting up man-machine interaction with outside computer.
Analog input and output device the most according to claim 1, it is characterised in that voltage signal acquisition unit includes using
Circuit is adjusted, for voltage signal being converted to the electricity of frequency signal in the amplifier that d. c. voltage signal is carried out amplifier adjustment
Pressure/frequency changer, for carrying out the optical coupling isolation circuit of light-coupled isolation.
Analog input and output device the most according to claim 1, it is characterised in that current signal collecting unit includes using
In DC current signal being converted into the sample circuit of d. c. voltage signal, being used for d. c. voltage signal is carried out amplifier adjustment
Amplifier adjusts circuit, for voltage signal being converted to the voltage/frequency changer of frequency signal, being used for carrying out light-coupled isolation
Optical coupling isolation circuit.
Analog input and output device the most according to claim 1, it is characterised in that frequency signal collecting unit includes using
In the Differential input circuit of universal frequency amount signal input, for being filtered the filter circuit of process, for carrying out signal ratio
The comparator that relatively processes, for carrying out the optical coupling isolation circuit of light-coupled isolation.
Analog input and output device the most according to claim 1, it is characterised in that current signal output unit includes two
Road current signal output, is respectively used to drive crosspointer table speed limit and real speed pointer, and current signal output in each of which road all comprises
Numeral isolation circuit, D/A conversion circuit.
Analog input and output device the most according to claim 1, it is characterised in that output of pulse signal unit output one
The signal of road pulse, is used for driving speedometer, output of pulse signal unit to include optical coupling isolation circuit, triode switch electricity
Road.
Analog input and output device the most according to claim 1, it is characterised in that device also includes safety circuit and continues
Electrical equipment group, by relay group control two-way current signal export, output of pulse signal and bus-powered, when simulation plug-in unit inspection
After measuring fault or operation exception, automatically cut off external output.
Analog input and output device the most according to claim 1, it is characterised in that analog input and output device according to
The value of contrast external input signal and the linear difference of the value of collection record, compensate this linear difference by calculating, it is to avoid because of
The precision problem that circuit devcie parameter error causes.
Analog input and output device the most according to claim 1, it is characterised in that communication module uses dual redundant
FlexRay communication bus.
Analog input and output device the most according to claim 1, it is characterised in that analog input and output device is adopted
By hardware configuration identification technology and encryption technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610770374.0A CN106200502A (en) | 2016-08-30 | 2016-08-30 | A kind of analog input and output device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610770374.0A CN106200502A (en) | 2016-08-30 | 2016-08-30 | A kind of analog input and output device |
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| CN106200502A true CN106200502A (en) | 2016-12-07 |
Family
ID=58088838
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| CN201610770374.0A Pending CN106200502A (en) | 2016-08-30 | 2016-08-30 | A kind of analog input and output device |
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| CN106786532A (en) * | 2016-12-27 | 2017-05-31 | 爱恒能源科技（上海）有限公司 | Electric intelligent optimizes distributor |
| CN111874049A (en) * | 2020-08-06 | 2020-11-03 | 北京交大思诺科技股份有限公司 | Brake control system for safety computer of train control |
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| CN111874049A (en) * | 2020-08-06 | 2020-11-03 | 北京交大思诺科技股份有限公司 | Brake control system for safety computer of train control |
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Application publication date: 20161207 |
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