CN105676037B - A kind of two-way isolation measurement system of functional safety type - Google Patents
A kind of two-way isolation measurement system of functional safety type Download PDFInfo
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- CN105676037B CN105676037B CN201610165032.6A CN201610165032A CN105676037B CN 105676037 B CN105676037 B CN 105676037B CN 201610165032 A CN201610165032 A CN 201610165032A CN 105676037 B CN105676037 B CN 105676037B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Testing Electric Properties And Detecting Electric Faults (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The present invention provides a kind of two-way isolation measurement system of functional safety type, including：Signal input module for input signal sampling and input power sampling and passes through the input signal and input power progress fault diagnosis after sampling；Secure storage module for storing data and carries out data diagnosis, and the control circuit working condition after being assessed；Signal output module, the data for receiving signal input module and secure storage module output, and the data by after export after being handled；Power module for carrying out the mutual conversion between direct current signal and AC signal, and is exported to signal input module and signal output module；Isolation module, the one-way transmission and electric signal transmitted in both directions of the power supply signal for controlling power module；Module is turned off, for being exported according to the output of secure storage module to control the data of signal output module.It can go wrong to signal or inside is broken down or other unknown states judge, and ensure system output safe condition.
Description
Technical field
The present invention relates to industrial signal translating system technical fields, are surveyed more particularly to a kind of two-way isolation of functional safety type
Amount system.
Background technology
Conversion and buffer action of the existing measuring system whole realization input signal to output signal；When signal goes wrong
Or inside is broken down or when other unknown states, system may hazard output signal；When system longtime running after a certain period of time,
The probability that system fails can increase, but the measurement without standard measure or assessment；
Following disadvantage exists in the prior art：
1) circuits such as input, output signal can not be detected；
2) internal fault can not be detected；
3) product failure probability is without standard measure；
Such as it is disclosed in published patent bidirectional, dc-isolated transmission channel (CN10421765B) a kind of for straight
Flow the arrangements and methods of the point isolation transmission of signal and AC signal.The signal can exist via the channel of identical only DC isolation
It is sent in both direction.Changing configuration includes：Direct current transmitter (4) in first transmission-reception system (1), short-circuit mode, operation
Amplifier configures (5) and the second transmission-reception system (2) with message signale transmitter (9).This patent there are the shortcomings that
For：When signal goes wrong or inside is broken down or when other unknown states, system may hazard output signal.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of two-way isolation of functional safety type
Measuring system, including：Signal input module is believed for input signal sampling and input power sampling and by the input after sampling
Number and input power carry out fault diagnosis；Secure storage module for storing data and carries out data diagnosis, and is being assessed
Control circuit working condition afterwards；Signal output module, it is defeated for receiving the signal input module and the secure storage module
The data gone out, and the data by after handled after export；Power module, for carrying out between direct current signal and AC signal
Mutually conversion, and export to the signal input module and the signal output module；Isolation module, for controlling the power supply
The one-way transmission and electric signal transmitted in both directions of the power supply signal of module；Module is turned off, for according to the secure storage module
The data output for exporting to control the signal output module.
Further include clock module in one embodiment of the invention, the clock module includes the first clock unit and the
Two clock units；First clock unit is connected to the signal input module, and the second clock unit is connected to described
Signal output module.
In one embodiment of the invention, the signal input module includes：Input signal sampling unit, for input
Signal is sampled；Input signal redundancy sampling unit, for the input signal sampling unit simultaneously to input signal into
Row sampling；First micro-control unit, for being adopted to the input signal sampling unit and the input signal redundancy sampling unit
The input signal of sample is compared and is calculated；First diagnosis unit, the result for being calculated in conjunction with first micro-control unit
Fault diagnosis is carried out to the signal input module and exports diagnostic message.
In one embodiment of the invention, input signal redundancy sampling unit is additionally operable to simultaneously adopt input power
Sample, and be sent to first micro-control unit after sampling, and with described first after first micro-control unit processing
Diagnosis unit, which combines, carries out fault diagnosis.
In one embodiment of the invention, the signal output module includes：Output signal sampling unit, for described
Signal input module and the output signal of the secure storage module are sampled；Output signal redundancy sampling unit, for
The output signal sampling unit simultaneously samples output signal；Second micro-control unit, for the output signal
The output signal of sampling unit and the output signal redundancy sampling unit sampling is compared and is calculated；Second opinion unit,
Result for being calculated in conjunction with second micro-control unit carries out fault diagnosis to the signal output module and exports diagnosis
Information.
In one embodiment of the invention, the signal output module further includes：Output signal redundancy sampling unit, is also used
Out-put supply is sampled in simultaneously, and is sent to second micro-control unit after sampling, and in second micro-control
It is combined with the second opinion unit after cell processing processed and carries out fault diagnosis.
In one embodiment of the invention, the secure storage module includes：Thrashing assessment unit connects for basis
The storage data received are calculated and compared, and control the shutdown module and final output state；Input data secure storage
Unit, the diagnostic message of data and first diagnosis unit output for storing the signal input module, and control
The two-way isolation measurement system input parallel circuit working condition of functional safety type, while sending information to the system and losing
Imitate assessment unit；Output data secure storage unit, data and described second for storing the signal output module are examined
The diagnostic message of disconnected unit output, and control the two-way isolation measurement system output section circuit output response of the functional safety type
Safe condition, while sending information to the thrashing assessment unit.
In one embodiment of the invention, the power module includes：DC communication unit is used for DC power signal
Be converted to ac supply signal；Input AC direct current component is used for the ac supply signal of the DC communication cell translation
It is converted to DC power signal and is provided in the signal input module；AC DC unit is exported, is used for the DC communication
The ac supply signal of cell translation is converted to DC power signal and is provided in the signal output module.
In one embodiment of the invention, the power module further includes：Voltage regulation unit inputs the power supply for ensureing
The stabilization of the power supply of module.
In one embodiment of the invention, the isolation module includes：Power supply signal one-way transmission unit is believed for power supply
Number from the one-way transmission of power input-output；Electric signal transmitted in both directions unit, the input-output or output-for electric signal are defeated
The transmitted in both directions entered.
As described above, a kind of two-way isolation measurement system of functional safety type of the present invention, has the advantages that：
It can go wrong to signal or inside is broken down or other unknown states judge, and ensure system output
Safe condition；The measurement or assessment that can be quantified, the probability that system fails can increase, when one timing of system longtime running
Between after, remind user overhaul or safeguard to ensure its safety.
Description of the drawings
Fig. 1 is shown as the schematic diagram of one embodiment of system framework of the two-way isolation measurement system of functional safety type of the present invention.
Fig. 2 is shown as the signal of another embodiment of system framework of the two-way isolation measurement system of functional safety type of the present invention
Figure.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema then
Draw, when actual implementation kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel
It is likely more complexity.
One embodiment of system framework of the two-way isolation measurement system of functional safety type of the present invention is shown as referring to Fig. 1, Fig. 1
Schematic diagram.The present invention provides a kind of two-way isolation measurement systems of functional safety type, including：
Signal input module for input signal sampling and input power sampling and passes through input signal after sampling and defeated
Enter power supply and carries out fault diagnosis；
Secure storage module, for storing data and carry out data diagnosis, and after being assessed control circuit work shape
State；
Signal output module, the data for receiving signal input module and secure storage module output, and the number by after
According to being exported after being handled；
Power module for carrying out the mutual conversion between direct current signal and AC signal, and exports and inputs mould to signal
Block and signal output module；
Isolation module, the one-way transmission and electric signal transmitted in both directions of the power supply signal for controlling power module；
Module is turned off, for being exported according to the output of secure storage module to control the data of signal output module.
As shown in Fig. 2, Fig. 2 is shown as another implementation of system framework of the two-way isolation measurement system of functional safety type of the present invention
The schematic diagram of example.In another embodiment of the invention, the two-way isolation measurement system of a kind of functional safety type provided by the invention,
Including：
Signal input module for input signal sampling and input power sampling and passes through input signal after sampling and defeated
Enter power supply and carries out fault diagnosis；In the preferred embodiment of the present invention, signal input module includes：Input signal sampling is single
Member, for being sampled to input signal；Input signal redundancy sampling unit is used for input signal sampling unit simultaneously to defeated
Enter signal to be sampled；First micro-control unit, for being adopted to input signal sampling unit and input signal redundancy sampling unit
The input signal of sample is compared and is calculated；First diagnosis unit, for combining the result that the first micro-control unit calculates to letter
Number input module carries out fault diagnosis and exports diagnostic message.Input signal redundancy sampling unit is additionally operable to simultaneously to input electricity
Source is sampled, and is sent to the first micro-control unit after sampling, and is diagnosed with first after the processing of the first micro-control unit
Unit, which combines, carries out fault diagnosis.Specifically, input signal sampling module and input signal redundancy sampling module are A/D conversions
Module.
Secure storage module, for storing data and carry out data diagnosis, and after being assessed control circuit work shape
State；In the preferred embodiment of the present invention, secure storage module includes：Thrashing assessment unit is received for basis
Storage data be calculated and compared, and control shutdown module and final output state；Input data secure storage unit, is used for
Store the data of signal input module and the diagnostic message of the first diagnosis unit output, and the safety-type two-way isolation of control function
Measuring system importation circuit working state, while sending information to thrashing assessment unit；Output data is deposited safely
Storage unit, the diagnostic message of data and the output of second opinion unit for storing signal output module, and control function is pacified
The safe condition of the two-way isolation measurement system output section circuit output response of holotype, while sending information to thrashing and commenting
Estimate unit.In order to increase working efficiency, input data secure storage unit and output data secure storage unit usually only store
Critical data, while the waste of memory space can also be reduced.
Signal output module, the data for receiving signal input module and secure storage module output, and the number by after
According to being exported after being handled；In the preferred embodiment of the present invention, signal output module includes：Output signal sampling unit,
It is sampled for the output signal to signal input module and secure storage module；Output signal redundancy sampling unit, is used for
Output signal is sampled simultaneously with output signal sampling unit；Second micro-control unit, it is single for being sampled to output signal
Member and the output signal of output signal redundancy sampling unit sampling are compared and are calculated；Second opinion unit, for combining the
The result that two micro-control units calculate carries out fault diagnosis to signal output module and exports diagnostic message.Output signal redundancy is adopted
Sample unit is additionally operable to simultaneously sample out-put supply, and is sent to the second micro-control unit after sampling, and micro- second
It is combined with second opinion unit after control unit processing and carries out fault diagnosis.Specifically, output signal sampling module and output are believed
Number redundancy sampling module is D/A conversion modules.Such as：Signal output module is responsible for receiving signal input module and secure storage
The output of module is realized the processing of output data by the second micro-control unit, and sends the output of data processing to D/A and turn
Block is changed the mold to realize the transmission of final system input-output；Output redundancy sampling module is responsible for realizing out-put supply sampling, output
Signal sampling, and its result is exported to out-put supply diagnosis and output signal diagnosis, and send thrashing evaluation module to；
Output signal redundancy sampling be also responsible for sampled output signal send to output data processing, handled through output data, with realize from
The transmitted in both directions of output-input；Second micro-control unit is diagnosed by out-put supply, in output signal diagnosis and output par, c
Portion's diagnosis comes together to realize output par, c failure diagnosis information.
Power module for carrying out the mutual conversion between direct current signal and AC signal, and exports and inputs mould to signal
Block and signal output module；In the preferred embodiment of the present invention, power module includes：DC communication unit, being used for will be straight
Galvanic electricity source signal is converted to ac supply signal；Input AC direct current component is used for the alternating current of DC communication cell translation
Source signal is converted to DC power signal and is provided in signal input module；AC DC unit is exported, is used for DC communication list
The ac supply signal of member conversion is converted to DC power signal and is provided in signal output module.Power module further includes：Voltage stabilizing
Unit is connected between power supply and DC communication unit, the stabilization of the power supply for ensureing input power module.
Isolation module, the one-way transmission and electric signal transmitted in both directions of the power supply signal for controlling power module；In this hair
In a bright preferred embodiment, isolation module includes：Power supply signal one-way transmission unit is used for power supply signal from power input-
The one-way transmission of output；Electric signal transmitted in both directions unit, the transmitted in both directions of input-output or output-input for electric signal.
Module is turned off, for being exported according to the output of secure storage module to control the data of signal output module.
In the present embodiment, the two-way isolation measurement system of functional safety type further includes clock module, and clock module includes the
One clock unit and second clock unit；First clock unit is connected to signal input module, and second clock unit is connected to letter
Number output module.
In conclusion the present invention a kind of two-way isolation measurement system of functional safety type, can go wrong to signal or
Inside is broken down or other unknown states are judged, and ensures system output safe condition；Can quantify measurement or
Assessment, the probability that system fails can increase, when system longtime running after a certain period of time, prompting user overhauls or safeguards
To ensure its safety.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of two-way isolation measurement system of functional safety type, which is characterized in that including：
Signal input module for input signal sampling and input power sampling and passes through the input signal and input electricity after sampling
Source carries out fault diagnosis；
Secure storage module for storing data and carries out data diagnosis, and the control circuit working condition after being assessed；
Signal output module, the diagnostic data for receiving the signal input module and secure storage module output, and
It is exported after data after assessment are handled；
Power module for carrying out the mutual conversion between direct current signal and AC signal, and exports and inputs mould to the signal
Block and the signal output module；
Isolation module, the one-way transmission and electric signal transmitted in both directions of the power supply signal for controlling the power module；
Module is turned off, for being exported according to the output of the secure storage module to control the data of the signal output module.
2. the two-way isolation measurement system of functional safety type according to claim 1, which is characterized in that further include clock mould
Block, the clock module include the first clock unit and second clock unit；First clock unit is connected to the signal
Input module, the second clock unit are connected to the signal output module.
3. the two-way isolation measurement system of functional safety type according to claim 1, which is characterized in that the signal inputs mould
Block includes：
Input signal sampling unit, for being sampled to input signal；
Input signal redundancy sampling unit, for being sampled simultaneously to input signal with the input signal sampling unit；
First micro-control unit, for the input signal sampling unit and the input signal redundancy sampling unit sampling
Input signal is compared and is calculated；
First diagnosis unit, the result for being calculated in conjunction with first micro-control unit carry out event to the signal input module
Barrier diagnoses and exports diagnostic message.
4. the two-way isolation measurement system of functional safety type according to claim 3, which is characterized in that input signal redundancy is adopted
Sample unit is additionally operable to simultaneously sample input power, and is sent to first micro-control unit after sampling, and in institute
Progress fault diagnosis is combined with first diagnosis unit after stating the processing of the first micro-control unit.
5. the two-way isolation measurement system of functional safety type according to claim 4, which is characterized in that the signal exports mould
Block includes：
Output signal sampling unit is adopted for the output signal to the signal input module and the secure storage module
Sample；
Output signal redundancy sampling unit, for being sampled simultaneously to output signal with the output signal sampling unit；
Second micro-control unit, for the output signal sampling unit and the output signal redundancy sampling unit sampling
Output signal is compared and is calculated；
Second opinion unit, the result for being calculated in conjunction with second micro-control unit carry out event to the signal output module
Barrier diagnoses and exports diagnostic message.
6. the two-way isolation measurement system of functional safety type according to claim 5, which is characterized in that the signal exports mould
Block further includes：
Output signal redundancy sampling unit is additionally operable to simultaneously sample out-put supply, and is sent to described after sampling
Two micro-control units, and combined with the second opinion unit after second micro-control unit processing and carry out fault diagnosis.
7. the two-way isolation measurement system of functional safety type according to any one of claim 5~6, which is characterized in that institute
Stating secure storage module includes：
Thrashing assessment unit for being calculated and compared according to the storage data received, and controls the shutdown module
With final output state；
Input data secure storage unit, the data and first diagnosis unit for storing the signal input module are defeated
The diagnostic message gone out, and the two-way isolation measurement system input parallel circuit working condition of the functional safety type is controlled, simultaneously will
Information is sent to the thrashing assessment unit；
Output data secure storage unit, the data and the second opinion unit for storing the signal output module are defeated
The diagnostic message gone out, and control the safe shape of the two-way isolation measurement system output section circuit output response of the functional safety type
State, while sending information to the thrashing assessment unit.
8. the two-way isolation measurement system of functional safety type according to claim 1, which is characterized in that the power module packet
It includes：
DC communication unit, for DC power signal to be converted to ac supply signal；
Input AC direct current component, for the ac supply signal of the DC communication cell translation to be converted to DC power supply letter
Number it is provided in the signal input module；
AC DC unit is exported, for the ac supply signal of the DC communication cell translation to be converted to DC power supply letter
Number it is provided in the signal output module.
9. the two-way isolation measurement system of functional safety type according to claim 8, which is characterized in that the power module is also
Including：
Voltage regulation unit, the stabilization of the power supply for ensureing to input the power module.
10. the two-way isolation measurement system of functional safety type according to claim 1, which is characterized in that the isolation module
Including：
Power supply signal one-way transmission unit is used for one-way transmission of the power supply signal from power input-output；
Shen signal transmitted in both directions unit, the transmitted in both directions of input-output or output-input for Shen signal.
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| CN201610165032.6A CN105676037B (en) | 2016-03-22 | 2016-03-22 | A kind of two-way isolation measurement system of functional safety type |
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| CN201610165032.6A CN105676037B (en) | 2016-03-22 | 2016-03-22 | A kind of two-way isolation measurement system of functional safety type |
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| CN105676037B true CN105676037B (en) | 2018-10-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10217447A1 (en) * | 2002-04-18 | 2003-11-13 | Knick Elektronische Mesgeraete | Signal isolator for measurement signals, especially dead or live zero measurement signals, uses an auxiliary energy supply and has primary and secondary side choppers, with the second chopper forming part of a modulation circuit |
| CN203101938U (en) * | 2012-12-07 | 2013-07-31 | 中科华核电技术研究院有限公司北京分公司 | Isolating valve driving module using fault diagnosis circuit to realize hot switch |
| CN104868732A (en) * | 2014-02-25 | 2015-08-26 | 上海辰竹仪表有限公司 | Isolated AC-DC signal two-way transmission circuit |
| CN205484610U (en) * | 2016-03-22 | 2016-08-17 | 上海辰竹仪表有限公司 | Two -way isolation measurement system of functional safety type |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006009506B4 (en) * | 2006-02-27 | 2010-09-23 | Phoenix Contact Gmbh & Co. Kg | Bidirectional, galvanically isolated transmission channel |
-
2016
- 2016-03-22 CN CN201610165032.6A patent/CN105676037B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10217447A1 (en) * | 2002-04-18 | 2003-11-13 | Knick Elektronische Mesgeraete | Signal isolator for measurement signals, especially dead or live zero measurement signals, uses an auxiliary energy supply and has primary and secondary side choppers, with the second chopper forming part of a modulation circuit |
| CN203101938U (en) * | 2012-12-07 | 2013-07-31 | 中科华核电技术研究院有限公司北京分公司 | Isolating valve driving module using fault diagnosis circuit to realize hot switch |
| CN104868732A (en) * | 2014-02-25 | 2015-08-26 | 上海辰竹仪表有限公司 | Isolated AC-DC signal two-way transmission circuit |
| CN205484610U (en) * | 2016-03-22 | 2016-08-17 | 上海辰竹仪表有限公司 | Two -way isolation measurement system of functional safety type |
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| Publication number | Publication date |
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