CN108226747A - A kind of dynamic circuit failure on-line detecting method - Google Patents
A kind of dynamic circuit failure on-line detecting method Download PDFInfo
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- CN108226747A CN108226747A CN201711242072.7A CN201711242072A CN108226747A CN 108226747 A CN108226747 A CN 108226747A CN 201711242072 A CN201711242072 A CN 201711242072A CN 108226747 A CN108226747 A CN 108226747A
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- dynamic circuit
- safety relay
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- circuit
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000004064 dysfunction Effects 0.000 claims abstract description 7
- 230000007257 malfunction Effects 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000008034 disappearance Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
-
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of dynamic circuit failure on-line detecting methods, belong to circuit detection field；In the operational process for being driving and Acquisition Circuit power supply in dynamic circuit first, periodically stop dynamic circuit input signal；Then safety relay disconnects driving and Acquisition Circuit power supply, and safety relay calculates and large bulk capacitance is selected to be continuously driving and Acquisition Circuit power supply；Controller back production safety relay contacts status situation of change simultaneously, obtains current relay status；Controller judges whether the safety relay function in dynamic circuit is normal, if it is, Restoration dynamics circuit input signal, dynamic circuit continues as driving and Acquisition Circuit power supply according to the dynamic circuit state after collected power-off；Otherwise safety relay dysfunction records malfunction, and alert.In the case where not influencing system normal operation, the present invention can realize the detection to dynamic circuit incipient fault, find potential risk in time, avoid causing dangerous output.
Description
Technical field
The invention belongs to circuit detection fields, and in particular to a kind of dynamic circuit failure on-line detecting method.
Background technology
High reliability and the occasion of high security are required in rail traffic, aerospace etc., needing to use has internal type
The dynamic circuit of failure safe feature realizes the control to driving and Acquisition Circuit power supply.
Dynamic circuit input signal is one group 0 degree and the reverse phase square-wave signal of 180 degree；In the process of running, once occurring
The situation of input signal exception or hardware damage, dynamic circuit will automatically cut off output channel, make export orientation secure side
In the prior art, power control switch is generally used as by safety relay in the terminal of dynamic circuit.Dynamic electric
When road works, safety relay normally-closed contact disconnects, and normally opened contact is closed；When dynamic circuit is stopped, safety relay is normal
Closed contact is closed, and normally opened contact disconnects.
Safety relay normally opened contact leads to as power supply output channel, normally-closed contact as safety relay state back production
Road.Since relay is there are the fault mode of contact adhesion, in above application, once relay contact adhesion occurs
Situation, it will cause relay contact that can not disconnect, lead to dangerous output.
Invention content
When for existing relay contact adhesion occurs for the present invention, relay contact, which can not disconnect, causes danger defeated
Go out, it is proposed that a kind of dynamic circuit failure on-line detecting method dives to dynamic circuit in the case where not influencing system normal operation
It is detected in failure.
It is as follows：
Step 1: in the operational process for being driving and Acquisition Circuit power supply in dynamic circuit, periodically stop dynamic circuit
Input signal.
Periodically refer to the last dynamic circuit input signal that stops between this time stopping dynamic circuit input signal
Time interval；It is set according to actual conditions.
Dynamic circuit input signal refers to the reverse phase square-wave signal of one group 0 degree and 180 degree.When this group of signal is unsatisfactory for 0
Signal output disappearance can all cause dynamic circuit to stop as driving to the phase relation or any of which of degree and 180 degree all the way
It powers with Acquisition Circuit.
Step 2: after dynamic circuit input signal disappears, safety relay disconnects driving and Acquisition Circuit power supply, using peace
The large bulk capacitance of all relay rear end is continuously driving and Acquisition Circuit power supply；
Power-off time depends on safety relay response time and release time, safety relay state-detection time.
The capacitance of capacitance is needed according to power-off time, driving and Acquisition Circuit power, driving and Acquisition Circuit allowable pressure drop
Range computation obtains.
The calculation formula for selecting capacitance is as follows：
C is the large bulk capacitance of safety relay selection；U is the operating voltage of driving and Acquisition Circuit；I is driving and adopts
The operating current of collector；T is power-off time.
Step 3: safety relay was disconnected in the period of driving and Acquisition Circuit power supply, controller back production safety relay
Device contacts status situation of change, obtains current relay status.
The safety relay state that controller back production is arrived meets：When dynamic circuit works, safety relay normally-closed contact breaks
It opens, normally opened contact is closed；When dynamic circuit is stopped, safety relay normally-closed contact is closed, and normally opened contact disconnects；Pacify at this time
All relay function is normal；Otherwise safety relay dysfunction is replaced.
Step 4: controller according to the dynamic circuit state after collected power-off, judge safety in dynamic circuit after
Whether electrical function is normal, if it is, Restoration dynamics circuit input signal, dynamic circuit continues as driving and Acquisition Circuit supplies
Electricity；Otherwise safety relay dysfunction records malfunction, and alert.
Under normal circumstances, safety relay state back production signal becomes high level from low level.
Under abnormal conditions, safety relay contact adhesion causes normally opened contact to remain closed, and normally-closed contact remains open shape
State, safety relay state back production signal is unchanged at this time, still keeps low level state.
Step 5: when next detection cycle arrives, repeat the above steps.
The advantage of the invention is that：
In the case where not influencing system normal operation, the detection to dynamic circuit incipient fault can be realized, send out in time
Existing potential risk, avoids causing dangerous output.
Description of the drawings
Fig. 1 is a kind of schematic diagram of dynamic circuit failure on-line detecting method of the present invention；
Fig. 2 is a kind of flow chart of dynamic circuit failure on-line detecting method of the present invention.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
The present invention is a kind of dynamic circuit failure on-line detecting method, as shown in Figure 1, in system normal course of operation,
Periodically stop 0 degree and 180 degree phase impulse input signal, dynamic circuit stops driving safety relay at this time.Positive reason
Under condition, safety relay normally opened contact disconnects at this time, and normally-closed contact is closed, and safety relay state back production signal is become by low level
For high level, system knows that safety relay is working properly by detecting the situation of change of this signal.Under abnormal conditions, due to peace
All relay contact adhesion causes normally opened contact that can not disconnect, is still kept closed, and normally-closed contact can not be closed, still
It remains off, safety relay state back production signal is unchanged at this time, still keeps low level state, and system passes through detection
The situation of change of this signal knows safety relay operation irregularity.
As shown in Fig. 2, it is as follows：
Step 1: in the operational process for being driving and Acquisition Circuit power supply in dynamic circuit, periodically stop dynamic circuit
Input signal.
Periodically refer to the last dynamic circuit input signal that stops between this time stopping dynamic circuit input signal
Time interval；It is set according to actual conditions.
Dynamic circuit input signal refers to the reverse phase square-wave signal of one group 0 degree and 180 degree.When this group of signal is unsatisfactory for 0
Signal output disappearance can all cause dynamic circuit to stop as driving to the phase relation or any of which of degree and 180 degree all the way
It powers with Acquisition Circuit.
Step 2: after dynamic circuit input signal disappears, safety relay disconnects driving and Acquisition Circuit power supply, using peace
The large bulk capacitance of all relay rear end is continuously driving and Acquisition Circuit power supply；
In dynamic circuit detection process, dynamic circuit stop for driving and Acquisition Circuit power supply time in, driving and
The power supply of Acquisition Circuit is provided completely by the large bulk capacitance of safety relay rear end.The capacitance needs of the capacitance drive according to rear end
It moves and is determined with the actual power loss of Acquisition Circuit and dynamic circuit failure detection time.
Power-off time depends on safety relay response time and release time, safety relay state-detection time.
The capacitance of capacitance is needed according to power-off time, driving and Acquisition Circuit power, driving and Acquisition Circuit allowable pressure drop
Range computation obtains.
The calculation formula for selecting capacitance is as follows：
C is the large bulk capacitance of safety relay selection；U is the operating voltage of driving and Acquisition Circuit；I is driving and adopts
The operating current of collector；T is power-off time.
Assuming that power-off time be t=50ms, driving and Acquisition Circuit operating voltage be U=24V, allowable pressure drop for 5V (i.e.
Driving and the minimum operating voltage of Acquisition Circuit be 19V), driving and Acquisition Circuit operating current be 0.1A, large bulk capacitance capacitance
For C.According to formulaIt brings above-mentioned parameter into formula, C=417uF is calculated.That is, selection capacitance
The normal of driving and Acquisition Circuit is not interfered with when the capacitance of more than 417uF is to ensure that and is detecting dynamic circuit
Work.
Step 3: safety relay was disconnected in the period of driving and Acquisition Circuit power supply, controller back production safety relay
Device contacts status situation of change, obtains current relay status.
The safety relay state that controller back production is arrived meets：When dynamic circuit works, safety relay normally-closed contact breaks
It opens, normally opened contact is closed；When dynamic circuit is stopped, safety relay normally-closed contact is closed, and normally opened contact disconnects；Pacify at this time
All relay function is normal；Otherwise safety relay dysfunction is replaced.
Step 4: controller according to the dynamic circuit state after collected power-off, judge safety in dynamic circuit after
Whether electrical function is normal, if it is, Restoration dynamics circuit input signal, dynamic circuit continues as driving and Acquisition Circuit supplies
Electricity；Otherwise safety relay dysfunction records malfunction, and alert.
Under normal circumstances, safety relay normally opened contact disconnects, and normally-closed contact is closed, safety relay state back production signal
High level is become from low level, system knows that safety relay is working properly by detecting the situation of change of this signal.
Under abnormal conditions, due to safety relay contact adhesion, cause normally opened contact that can not disconnect, still remain closed shape
State, normally-closed contact can not be closed, still remain off, and safety relay state back production signal is unchanged at this time, still protects
Low level state is held, system knows safety relay operation irregularity by detecting the situation of change of this signal.
Step 5: when next detection cycle arrives, repeat the above steps.
Claims (5)
1. a kind of dynamic circuit failure on-line detecting method, which is characterized in that be as follows：
Step 1: in the operational process for being driving and Acquisition Circuit power supply in dynamic circuit, periodically stop dynamic circuit input
Signal；
Step 2: dynamic circuit input signal disappear after, safety relay disconnect driving and Acquisition Circuit power supply, using safety after
The large bulk capacitance of electric appliance rear end is continuously driving and Acquisition Circuit power supply；
The capacitance of capacitance is needed according to power-off time, driving and Acquisition Circuit power, driving and Acquisition Circuit allowable pressure drop range
It is calculated；
The calculation formula for selecting capacitance is as follows：
C is the large bulk capacitance of safety relay selection；U is the operating voltage of driving and Acquisition Circuit；I is driving and acquisition electricity
The operating current on road；T is power-off time；
Step 3: safety relay was disconnected in the period of driving and Acquisition Circuit power supply, controller back production safety relay touches
Dotted state situation of change obtains current relay status；
Step 4: controller judges the safety relay in dynamic circuit according to the dynamic circuit state after collected power-off
Whether function is normal, if it is, Restoration dynamics circuit input signal, dynamic circuit continues as driving and Acquisition Circuit power supply；
Otherwise safety relay dysfunction records malfunction, and alert；
Step 5: when next detection cycle arrives, repeat the above steps.
2. a kind of dynamic circuit failure on-line detecting method as described in claim 1, which is characterized in that described in step 1
Periodicity refer to the last dynamic circuit input signal that stops to the time between this time stopping dynamic circuit input signal
Interval, is set according to actual conditions；
The dynamic circuit input signal refers to the reverse phase square-wave signal of one group 0 degree and 180 degree；When this group of signal is unsatisfactory for
Signal output disappears dynamic circuit can all be caused to stop as driving the phase relation or any of which of 0 degree and 180 degree all the way
It powers with Acquisition Circuit.
A kind of 3. dynamic circuit failure on-line detecting method as described in claim 1, which is characterized in that the step two
In, power-off time depends on safety relay response time and release time, safety relay state-detection time.
A kind of 4. dynamic circuit failure on-line detecting method as described in claim 1, which is characterized in that the step three
In, the safety relay state that controller back production is arrived meets：When dynamic circuit works, safety relay normally-closed contact disconnects, often
Open contact closure；When dynamic circuit is stopped, safety relay normally-closed contact is closed, and normally opened contact disconnects；At this time safety after
Electrical function is normal；Otherwise safety relay dysfunction is replaced.
A kind of 5. dynamic circuit failure on-line detecting method as described in claim 1, which is characterized in that the step four
In, under normal circumstances, safety relay state back production signal becomes high level from low level；
Under abnormal conditions, safety relay contact adhesion causes normally opened contact to remain closed, and normally-closed contact remains off,
Safety relay state back production signal is unchanged at this time, still keeps low level state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711242072.7A CN108226747A (en) | 2017-11-30 | 2017-11-30 | A kind of dynamic circuit failure on-line detecting method |
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| CN201711242072.7A CN108226747A (en) | 2017-11-30 | 2017-11-30 | A kind of dynamic circuit failure on-line detecting method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109260347A (en) * | 2018-10-25 | 2019-01-25 | 岭南师范学院 | A kind of rhizoma cyperi saponins compound separating and extracting process |
| CN112653222A (en) * | 2020-12-21 | 2021-04-13 | 浙江钱江机器人有限公司 | Industrial robot dual-power-supply safety working module |
| CN113232694A (en) * | 2021-06-02 | 2021-08-10 | 中车青岛四方机车车辆股份有限公司 | Three-phase motor power supply system |
| CN114779613A (en) * | 2022-04-13 | 2022-07-22 | 中国兵器装备集团自动化研究所有限公司 | Relay bypass circuit and electronic equipment based on safety function |
| CN114987362A (en) * | 2022-04-22 | 2022-09-02 | 北京艾上智能科技有限公司 | Unmanned vehicle energy management control method and system |
| CN115877191A (en) * | 2021-09-27 | 2023-03-31 | 中车株洲电力机车研究所有限公司 | Relay service life assessment method and test system for rail transit |
| CN116996534A (en) * | 2023-07-14 | 2023-11-03 | 中国铁道科学研究院集团有限公司通信信号研究所 | A communication interface device and control method for railway train operation control system |
| CN117284355A (en) * | 2023-08-14 | 2023-12-26 | 江苏华创微系统有限公司 | Dual-master mutual exclusion circuit and determination method based on rail transit safety computing platform |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109260347A (en) * | 2018-10-25 | 2019-01-25 | 岭南师范学院 | A kind of rhizoma cyperi saponins compound separating and extracting process |
| CN112653222A (en) * | 2020-12-21 | 2021-04-13 | 浙江钱江机器人有限公司 | Industrial robot dual-power-supply safety working module |
| CN113232694A (en) * | 2021-06-02 | 2021-08-10 | 中车青岛四方机车车辆股份有限公司 | Three-phase motor power supply system |
| CN115877191A (en) * | 2021-09-27 | 2023-03-31 | 中车株洲电力机车研究所有限公司 | Relay service life assessment method and test system for rail transit |
| CN114779613A (en) * | 2022-04-13 | 2022-07-22 | 中国兵器装备集团自动化研究所有限公司 | Relay bypass circuit and electronic equipment based on safety function |
| CN114987362A (en) * | 2022-04-22 | 2022-09-02 | 北京艾上智能科技有限公司 | Unmanned vehicle energy management control method and system |
| CN116996534A (en) * | 2023-07-14 | 2023-11-03 | 中国铁道科学研究院集团有限公司通信信号研究所 | A communication interface device and control method for railway train operation control system |
| CN117284355A (en) * | 2023-08-14 | 2023-12-26 | 江苏华创微系统有限公司 | Dual-master mutual exclusion circuit and determination method based on rail transit safety computing platform |
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