CN105946902B - A kind of Static output adds the track traffic Safety output system of static dynamic pulse detection - Google Patents
A kind of Static output adds the track traffic Safety output system of static dynamic pulse detection Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
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Abstract
The present invention relates to the track traffic Safety output system that a kind of Static output adds static dynamic pulse detection, including safety control circuit, the safety control circuit includes the safety relay for being used to control corresponding signal equipment, the safety relay is controlled by control unit, the safety control circuit at least includes the control unit of two passages, each channel control unit includes a processing unit, output unit that is corresponding with the processing unit and connecting the safety relay, and a sound state back production unit, the processing unit includes detecting pulses generation module in short-term, short-time pulse decoder module and static decoder module, the safety control circuit also includes the reference signal generation unit for being used to provide reference signal to described control unit.By setting sound state back production unit in track transport control circuit so that processing unit can carry out back production contrast to the result of output, so that the control to determine circuit, improves the accuracy of whole circuit.
Description
Present patent application is a kind of division Shen of invention and created name " track traffic safety control circuit and system "
Please, the applying date of original application is September in 2014 23, Application No. 2014104899558.
Technical field
The present invention relates to safety control circuit in field of track traffic, more particularly to a kind of track traffic and security control system
System.
Background technology
In track field of traffic control, generally, its Safety output by directly drive control it is outside safely after
Electrical equipment is so as to control corresponding signalling arrangement (such as car such as semaphore, goat trackside equipment and pull-in control system, car door
Carry equipment).Generally, Safety output system external certain voltage is provided so that external relay excitation pick up or
Loss of excitation falls and then controls external signal equipment.And it is well known that relay excitation picks up and often represents a kind of precarious position,
If Safety output system mistake picks up external relay excitation, it is likely that cause train to derail or collide etc. very tight
The accident of weight.
At present, the Safety output control of industry generally existing has two kinds, and one kind is Static output mode, that is, needs externally defeated
When going out, the voltage that excitation is picked up can be allowed it to by being provided directly to external relay.Another way is dynamical output mode,
When needing externally output, the pulse signal of certain frequency is exported, electric capacity is charged using pulse, is then relay by electric capacity
Power supply, enables capacitance voltage to maintain the shape that external relay keeps excitation to pick up using the asymmetry of discharge and recharge
State.
The two kinds of Safety output modes generally used for industry, analyze the defect of its presence separately below.The first is defeated
Going out the greatest problem present in mode can not be found in time when adhesion fault occurs in output circuit, cause system mistake defeated
Go out, so as to cause the generation of dangerous situation.Specific explanations are as follows：1. when system for a long time externally output " 1 ", i.e., outside after
Electrical equipment is maintained at excitation and picks up state, and now output circuit sticks together failure, output state and the system output state of circuit
It is consistent, it is impossible to detect adhesion fault, and when system needs externally output " 0 ", because circuit sticks together failure
Lead to not export " 0 ", cause the generation of dangerous situation；2. when system, externally output " 0 ", i.e. external relay are kept for a long time
In loss of excitation full state, now output circuit sticks together failure, although Safety output generally using leading to more inside track traffic
Road exports voting mechanism, and when only one of which passage sticks together failure, the output of system external will not change, but be
System can not detect the failure, over time, voting passage another passage output circuit also there occurs it is identical
Adhesion fault, so as to cause system mistake externally to export, the generation of dangerous situation may finally be caused.Second of way of output
The greatest problem of presence is that the reliabilty and availability of system is substantially reduced, and adds maintenance cost.Due to using dynamic charge and discharge
The output form of electricity realizes external output, it is necessary to repeatedly discharge and recharge is carried out to output capacitance, and repeated charge can cause
The electric capacity life-span substantially reduces, for one piece of output board card, and the output capacitance failure of any one output channel can all cause
Whole output board card is unavailable, so as to cause system unavailable.In actual applications, output channel often compares many, so as to lead
The reliability of cause whole system is not high, and the service intervals of system are short, improve maintenance cost.
The content of the invention
The technical problems to be solved by the invention be to provide it is a kind of control circuit it is simple, reliability is high, maintenance cost is low
Static output adds the track traffic Safety output system of static dynamic pulse detection.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of Static output adds static dynamic arteries and veins
The track traffic Safety output system of detection, including safety control circuit are rushed, the safety control circuit includes being used to control phase
The safety relay of induction signal equipment, the safety relay is controlled by control unit, and the safety control circuit is extremely
Include the control unit of two passages less, each channel control unit includes a processing unit, corresponding with the processing unit
And the output unit and a sound state back production unit of the safety relay are connected, the processing unit includes examining in short-term
Pulses generation module, short-time pulse decoder module and static decoder module are surveyed, the safety control circuit also includes being used for institute
State the reference signal generation unit that control unit provides reference signal；The output unit of each passage include one be used to driving after
The output photoelectric coupled switch of electrical equipment, the sound state back production unit of each passage includes a triple gate and to the tri-state
Door Enable Pin provides the back production photoelectric coupling switch of signal, and the input anode tap electrical connection processing of output photoelectric coupled switch is single
Member, electrically, the output collector terminal of output photoelectric coupled switch is connected the input cathode terminal of output photoelectric coupled switch
VCC, the output emitter terminal of output photoelectric coupled switch is electrically connected contact relay while electrically connecting the defeated of back production photoelectric coupling switch
Enter anode, the input minus earth of back production photoelectric coupling switch, the current collection of back production photoelectric coupling switch as triple gate enable
Hold and connect pull-up resistor, the grounded emitter of back production photoelectric coupling switch.
It is preferred that, the input cathode terminal electrical connection processing unit of output photoelectric coupled switch, output photoelectric coupled switch
Input anode tap electric connection of power supply VCC, the output collector terminal connection ground of output photoelectric coupled switch, output photoelectric coupled switch
Output emitter terminal be electrically connected contact relay while electrically connecting the input negative electrode of back production photoelectric coupling switch, back production photoelectric coupling opens
The input anode of pass meets VCC, back production photoelectric coupling switch emitter stage electricity as triple gate Enable Pin and connect pull down resistor, return
Adopt the colelctor electrode of photoelectric coupling switch electrically.
Pass through and sound state back production unit is set in track transport control circuit so that processing unit can be to the knot of output
Fruit can carry out back production contrast, so that the control to determine circuit, improves the accuracy of whole circuit.By in square-wave signal
Edge (rising edge or trailing edge) setting detects pulse in short-term, and the detection signal is coupled in output control signal,
Detect that pulse signal carries out decoding detection contrast in short-term to this using processing unit in rear end, according to different decoding principle of contrast,
Fault detect that can be to circuit, it is determined that being that relay adhesion or circuit can not be exported, prevents that failure from accumulating and mistake is defeated
Go out, improve security of system, and circuit is simple, and reliability is high.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is the circuit diagram of the embodiment of track traffic safety control circuit of the present invention and system；
Fig. 2 is the pulse sequence of the detection in short-term signal of the embodiment of track traffic safety control circuit of the present invention and system
Figure；
When Fig. 3 is the processing unit output logical one of the embodiment of track traffic safety control circuit of the present invention and system
Sequence schematic diagram；
When Fig. 4 is the processing unit output logical zero of the embodiment of track traffic safety control circuit of the present invention and system
Sequence schematic diagram；
Fig. 5 is the partial circuit diagram of the embodiment of track traffic safety control circuit of the present invention and system；
Fig. 6 is the graph of a relation between the signal of the embodiment of track traffic safety control circuit of the present invention and system；
Fig. 7 is the graph of a relation between the signal of the embodiment of track traffic safety control circuit of the present invention and system.
Embodiment
Embodiment：
A kind of track traffic safety control circuit of the present invention, including for controlling the safety relay of corresponding signal equipment,
The safety relay is controlled by control unit, wherein, the safety control circuit at least includes the control of two passages
Unit processed, each channel control unit includes processing unit, corresponding with the processing unit and connect the safety relay
The output unit of device and a sound state back production unit, the safety control circuit also include being used for described control unit
The reference signal generation unit of reference signal is provided.The sound state back production unit input of each passage connects the output of other passages
The output end of unit, the output end of the sound state back production unit of each passage connects the processing unit of this passage.
As shown in figure 1, in the present embodiment, the safety control circuit includes two control units of A and B, wherein, control
Unit A includes processing unit A, output unit A (1), sound state back production unit A (3), and control unit B includes processing unit B, defeated
Go out unit B (2), sound state back production unit B (4).The processing unit A controls output unit A output control relay signals, institute
State processing unit B and control the output unit B output control relay signals, the sound state back production unit A connections output is single
First B, the output signal to output unit B carries out back production and is transferred to processing unit A, and the sound state back production unit B connection is defeated
Go out unit A, the output signal to output unit A carries out back production and is transferred to processing unit B.
The output unit of each passage includes an output photoelectric coupled switch for being used to drive relay.Each passage
Sound state back production unit includes a triple gate and opened to the back production photoelectric coupling that the triple gate Enable Pin provides signal
Close.
As shown in figure 1, the input anode tap electrical connection processing unit A of output photoelectric coupled switch in output unit A, defeated
The input cathode terminal of the output photoelectric coupled switch gone out in unit A electrically, the output photoelectric coupled switch in output unit A
Output collector terminal connection VCC, the output emitter terminal of the output photoelectric coupled switch in output unit A is electrically connected contact relay
Returning in the input anode of the back production photoelectric coupling switch in sound state back production unit B, sound state back production unit B is electrically connected simultaneously
Adopt the colelctor electrode conduct of the back production photoelectric coupling switch in the input minus earth of photoelectric coupling switch, sound state back production unit B
The Enable Pin of triple gate simultaneously connects pull-up resistor, the grounded emitter of the back production photoelectric coupling switch in sound state back production unit B.
In the input cathode terminal electrical connection processing unit of output photoelectric coupled switch in output unit B, output unit B
The output of output photoelectric coupled switch in input anode tap the electric connection of power supply VCC, output unit B of output photoelectric coupled switch
The output emitter terminal of output photoelectric coupled switch in collector terminal connection ground, output unit B is electrically connected contact relay while electricity
Connect the back production photoelectricity in the input negative electrode of the back production photoelectric coupling switch in sound state back production unit A, sound state back production unit A
The back production photoelectric coupling switch emitter stage that the input anode of coupled switch is connect in VCC, sound state back production unit A is used as triple gate
Enable Pin simultaneously connects pull down resistor, and the colelctor electrode of the back production photoelectric coupling switch in sound state back production unit A is electrically.
Certainly, need to emphasize herein, the specific connection of circuit is in order to form corresponding loop, to carry out signal
Detection, such as when processing unit output signal connects the output end of output unit, can connect photoelectric coupling by current-limiting resistance
The input anode or negative electrode of device, the connection of its other end will also be determined after its determination, only need to be in processing unit output signal
When, the front end of output unit can produce corresponding signal and be controlled output to rear end.Same principle, output unit
It may be selected to be exported in emitter stage or colelctor electrode, similar situation is also adapted in sound state back production unit, therefore, specifically
Circuit will not be repeated here.
The control system of circuit is controlled based on the traffic safety of the present embodiment middle orbit, the system includes：Reference signal is produced
Raw unit, processing unit, output unit, sound state back production unit, wherein, the processing unit includes detecting pulses generation in short-term
Module, output module, short-time pulse decoder module and static decoder module, rail safety control system perform following steps：
The reference signal generation unit produces a square-wave signal；
The detection pulses generation module in short-term produces one at the square-wave signal edge (rising edge or trailing edge)
The shorter detection pulse in short-term of individual duration；
The processing module is coupled and detected in short-term accordingly in the output signal according to the condition selecting for being currently needed for output
Pulse；
Short-time pulse decoder module is decoded the back production signal that sound state back production unit is gathered, in detection back production signal
Whether comprising pulse is detected in short-term, to determine whether output circuit sticks together；
The back production signal that static decoder module is gathered according to the square-wave signal to sound state back production unit is decoded, really
Recognize the pulse signal of detection in short-term and the corresponding dynamic pulse signal of output included within a complete cycle in back production signal
It is whether consistent, to confirm the normal work of circuit.
The present embodiment still illustrates with exporting two passages all the way,
The effect of reference signal generation unit is to produce dutycycle to be used for processing unit A and processing for 50% square-wave signal
Unit B synchronizes verification and signal generation dynamic pulse is detected to output circuit accordingly.The frequency of the signal should not
It is too high also should not be too low, it is too high cause system frequently synchronize verification detection, can make system treatment effeciency reduction；Underfrequency
Dynamic pulse can be caused to export, and detection time interval is longer, and the fault reaction time is oversize.The signal frequency should be not higher than 200Hz,
It is not less than 10Hz to be advisable, to prevent Hz noise, the frequency values of power frequency or power frequency multiple should not be chosen, such as domestic power frequency is
50Hz, U.S.'s power frequency is 60Hz.
The safety control system operating process of the present invention is described in detail, and concrete operation step is as follows：
1st, the pulses generation module of detection in short-term of processing unit (processing unit A and/or processing unit B) is according to reference signal
The reference signal of generation unit produces short-time pulse detection signal；
2nd, processing unit (processing unit A and/or processing unit B) judges to need externally to export at present state (0 or
1)；
3rd, the output module output coupling of processing unit (processing unit A and/or processing unit B) short-time pulse detection letter
Number logic level signal to output unit；
4th, the dynamic pulse decoder module of processing unit (processing unit A and/or processing unit B) passes through sound state back production list
First (processing unit B and/or processing unit A) collection short-time pulse detection data；
5th, the static decoder module of processing unit (processing unit A and/or processing unit B) passes through sound state back production unit
(processing unit B and/or processing unit A) gathers Static Detection data；
6th, the dynamic Static Detection data collected are sent to another processing unit by processing unit；
7th, the detection data that processing unit (processing unit A and/or processing unit B) compares that two processing units collect are
No and default state consistency, unanimously then carries out next round operation, inconsistent then by export orientation safety signal.
The key of the present invention is processing unit, is responsible for the generation of detection pulse in short-term and the decoding of back production signal, processing
Detection pulses generation module, output module, short-time pulse decoder module and static decoder module in short-term can be divided into inside unit.Under
Face is illustrated to crucial module respectively.
Pulses generation module is detected in short-term：
This module produces one according to the Sref signals of reference signal generation unit and detects pulse in short-term.Specific method is：
In the rising edge or trailing edge of Sref signals, the shorter detection pulse in short-term of a duration is produced.In the present embodiment
In, A channel produces when Sref signal rising edges and detects pulse signal in short-term, channel B Sref signal trailing edges when
Wait to produce and detect pulse signal in short-term.Short-time pulse detects that the phase relation between signal and reference signal Sref is as shown in Figure 2.
T is cycle reference signal in figure, and Ti is the duration for detecting pulse signal in short-term.Ti is a very crucial parameter, choosing
The misoperation (loss of excitation is fallen when such as excitation is picked up) of external relay can be caused by selecting inappropriate value, and Ti is typically according to outside real
The relay of border connection is selected, and generally should be smaller than 1ms.In Fig. 2, S1, S2 are that A channel detects pulse signal in short-term；S3、S4
Pulse signal is detected in short-term for channel B.
Output module：
Output module couples corresponding detection signal in the output signal according to the condition selecting for being currently needed for output, at this
In embodiment, specific principles in coupling is：
If externally exporting logical one, that is, external relay excitation is needed to pick up, then A channel output signal needs to couple Fig. 2
In S2 signals, channel B output signal need couple Fig. 2 in S3 signals.Output circuit normal work, without adhesion fault hair
When raw, the output signal of A channel and channel B is as shown in Figure 3.OUTA is A channel output signal in figure, and OUTB exports for channel B
Signal.
If externally exporting logical zero, that is, external relay loss of excitation is needed to fall, then A channel output signal needs to couple Fig. 2
In S1 signals, channel B output signal need couple Fig. 2 in S4 signals.Output circuit normal work, without adhesion fault hair
When raw, A channel and the logical output signals of B are as shown in Figure 4.OUTA is A channel output signal in figure, and OUTB is that channel B exports letter
Number.
Dynamic pulse decoder module：
The effect of dynamic pulse decoder module is that back production signal is decoded, so that processing unit confirms that output circuit is
It is no to there occurs adhesion fault.
Circuit is understood as shown in Figure 1, and A channel back production electric circuit inspection is whether channel B output circuit sticks together, and B
Passage back production electric circuit inspection is whether A channel output circuit sticks together.According to Fig. 3 and Fig. 4, A channel should be with reference to letter
Number trailing edge when carry out short-time pulse detection, channel B should carry out short-time pulse detection in the rising edge of reference signal.
Dynamic pulse decoder module is described in detail by taking A channel as an example for the present embodiment.A channel dynamic pulse decodes mould
Block is as shown in Figure 5.Processing unit controls the Enable Pin of triple gate to gather having for channel B short-time pulse by exporting OUTA signals
Nothing, OUTA signals are the dynamic pulse signals with coding information, if processing unit is in the time window residing for short-time pulse
Inside it is able to detect that the dynamic pulse signal corresponding with OUTA, then it is assumed that short-time pulse detection passes through, and otherwise short-time pulse is examined
Survey does not pass through.Relation (channel B output signal as shown in Figure 6 between OUTA signals and channel B output signal and reference signal
Correspondence externally exports logical one), for convenience of description, the short pulse signal amplification that channel B is exported in figure.The detection of channel B
Principle is identical with A channel, repeats no more here.Detection pulse herein can select 8bit, 16bit or 32bit coding letter
Number, can also be behind encoded signal plus CRC check code., can also be to different in order to prevent being interfered between passage
Passage uses different encoded signals.
Static decoder module：
Static decoder module is decoded according to cycle reference signal to back production signal, the reality of output circuit for confirmation
Whether border output is consistent with anticipated output.The present embodiment is still illustrated by taking the static decoder module of A channel as an example.Back production circuit is joined
See Fig. 5.Processing unit controls the Enable Pin of triple gate to gather the presence or absence of channel B output signal, OUTA by exporting OUTA signals
Signal is the dynamic pulse signal with coding information, if processing unit can be examined in a complete cycle reference signal
The dynamic pulse signal corresponding with OUTA is measured, then it is assumed that reality output is consistent with anticipated output, otherwise it is assumed that reality output
It is inconsistent with anticipated output.Relation (channel B as shown in Figure 7 between OUTA signals and channel B output signal and reference signal
Output signal correspondence externally exports logical one).The Cleaning Principle of channel B is identical with A channel, repeats no more here.Inspection herein
8bit, 16bit or 32bit encoded signal can be selected by surveying pulse, can also be behind encoded signal plus CRC check code.
In order to prevent being interfered between passage, different coded systems can also be used to different passages.Static decoder module
It is critical that OUTA signals are significantly larger than detected in short-term no matter which kind of coded system used per the bit wide of bit encoded signals
The width (more than 4 times) of pulse, and processing unit carry out signal sampling when to avoid detecting burst length window in short-term.
Pass through and sound state back production unit is set in track transport control circuit so that processing unit can be to the knot of output
Fruit can carry out back production contrast, so that the control to determine circuit, improves the accuracy of whole circuit.By in square-wave signal
Edge (rising edge or trailing edge) setting detects pulse in short-term, and the detection signal is coupled in output control signal,
Again rear end using processing unit this detect in short-term pulse signal carry out decoding detection contrast, can according to different decoding principle of contrast
With the fault detect to circuit, it is determined that being that relay adhesion or circuit can not be exported, prevent failure from accumulating and mistake output,
Security of system is improved, and circuit is simple, and reliability is high.
It is emphasized that protection scope of the present invention is including but not limited to above-mentioned embodiment.It should be pointed out that pair
For those skilled in the art, under the premise without departing from the principles of the invention, several modifications and improvements can also be made, this
It should also be considered as belonging to protection scope of the present invention a bit.
Claims (2)
1. a kind of Static output adds the track traffic Safety output system of static dynamic pulse detection, including safety control circuit,
It is characterized in that：The safety control circuit includes the safety relay for being used to control corresponding signal equipment, the safety relay
Device is controlled by control unit, and the safety control circuit at least includes the control unit of two passages, each passage control
Unit processed include processing unit, output unit that is corresponding with the processing unit and connecting the safety relay and
One sound state back production unit, the processing unit includes detection pulses generation module, short-time pulse decoder module and quiet in short-term
State decoder module, the safety control circuit also includes being used for producing to the reference signal that described control unit provides reference signal
Unit；The output unit of each passage includes an output photoelectric coupled switch for being used to drive relay, each passage it is dynamic
Static back production unit includes a triple gate and the back production photoelectric coupling switch of signal is provided to the triple gate Enable Pin,
The input anode tap electrical connection processing unit of output photoelectric coupled switch, the input cathode terminal electrical connection of output photoelectric coupled switch
Ground, the output collector terminal connection VCC of output photoelectric coupled switch, the output emitter terminal electrical connection of output photoelectric coupled switch
Relay electrically connects the input anode of back production photoelectric coupling switch simultaneously, and the input minus earth of back production photoelectric coupling switch is returned
The current collection of photoelectric coupling switch is adopted as the Enable Pin of triple gate and pull-up resistor is connected, the emitter stage of back production photoelectric coupling switch
Ground connection.
2. track traffic Safety output system according to claim 1, it is characterised in that：Output photoelectric coupled switch it is defeated
Enter cathode terminal electrical connection processing unit, the input anode tap electric connection of power supply VCC of output photoelectric coupled switch, output photoelectric coupling
The output collector terminal connection ground of switch, the output emitter terminal of the output photoelectric coupled switch contact relay that is electrically connected is electrically connected simultaneously
The input negative electrode of back production photoelectric coupling switch, the input anode of back production photoelectric coupling switch meets VCC, back production photoelectric coupling switch hair
Emitter-base bandgap grading electricity as triple gate Enable Pin and connect pull down resistor, the colelctor electrode of back production photoelectric coupling switch is electrically.
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| CN201610309006.6A CN105946902B (en) | 2014-09-23 | 2014-09-23 | A kind of Static output adds the track traffic Safety output system of static dynamic pulse detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610309006.6A CN105946902B (en) | 2014-09-23 | 2014-09-23 | A kind of Static output adds the track traffic Safety output system of static dynamic pulse detection |
| CN201410489955.8A CN104386091B (en) | 2014-09-23 | 2014-09-23 | A kind of track traffic safety control circuit and system |
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| CN201410489955.8A Division CN104386091B (en) | 2014-09-23 | 2014-09-23 | A kind of track traffic safety control circuit and system |
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| CN201410489955.8A Active CN104386091B (en) | 2014-09-23 | 2014-09-23 | A kind of track traffic safety control circuit and system |
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| CN105187049B (en) * | 2015-07-21 | 2018-07-31 | 北京佳讯飞鸿电气股份有限公司 | The dynamic acquisition circuit of fault-safety principle and the device of fault-safety principle |
| CN105446251B (en) * | 2016-01-18 | 2018-08-24 | 湖南中车时代通信信号有限公司 | A kind of secure digital amount input system and its signal processing method |
| CN105974841B (en) * | 2016-06-14 | 2018-08-31 | 浙江众合科技股份有限公司 | A kind of output control system applied to fail-safe computer |
| CN107380209B (en) * | 2017-08-10 | 2024-03-12 | 浙江众合科技股份有限公司 | Detection circuit for controlling switch machine |
| CN107817783B (en) * | 2017-10-23 | 2020-11-27 | 天津市英贝特航天科技有限公司 | Method and system for detecting recovery of output signal of rail transit |
| FR3092951B1 (en) | 2019-02-15 | 2021-07-23 | Alstom Transp Tech | Safety solid state relay cubicle and associated solid state relay cubicle |
| CN110850773B (en) * | 2019-11-14 | 2021-01-22 | 北京和利时***工程有限公司 | Signal acquisition method and device, computer storage medium and electronic equipment |
| CN113562017B (en) * | 2021-08-19 | 2023-02-28 | 中铁二十四局集团上海电务电化有限公司 | Railway turnout interlocking control system |
| CN114844026A (en) * | 2022-07-04 | 2022-08-02 | 北京全路通信信号研究设计院集团有限公司 | Safe input circuit and fault detection method |
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| JP4164628B2 (en) * | 2001-07-02 | 2008-10-15 | 株式会社日立製作所 | Fail-safe information processing device |
| CN101913369B (en) * | 2010-07-23 | 2012-01-18 | 上海亨钧科技有限公司 | Signal execution unit of computer interlock system and working method thereof |
| CN102176126B (en) * | 2011-02-23 | 2014-04-16 | 无锡和晶科技股份有限公司 | Single-port relay control circuit feedback detecting method |
| CN102880523B (en) * | 2012-10-10 | 2015-03-11 | 北京和利时***工程有限公司 | Watchdog circuit and failure monitoring method for same |
| CN105955114B (en) * | 2014-01-24 | 2018-08-28 | 浙江众合科技股份有限公司 | Safe input system based on dynamic pulse verification |
| CN103941718B (en) * | 2014-02-13 | 2017-07-11 | 浙江网新中控信息技术有限公司 | A kind of two take two failure safe export structure detecting systems |
| CN204309808U (en) * | 2014-09-23 | 2015-05-06 | 浙江众合机电股份有限公司 | A kind of track traffic safety control circuit and system |
-
2014
- 2014-09-23 CN CN201610309006.6A patent/CN105946902B/en active Active
- 2014-09-23 CN CN201410489955.8A patent/CN104386091B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105946902A (en) | 2016-09-21 |
| CN104386091B (en) | 2016-06-22 |
| CN104386091A (en) | 2015-03-04 |
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