CN105182149B - Anti-pinch device break detection circuit between a kind of subway platform door and train body - Google Patents
Anti-pinch device break detection circuit between a kind of subway platform door and train body Download PDFInfo
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- CN105182149B CN105182149B CN201510450662.3A CN201510450662A CN105182149B CN 105182149 B CN105182149 B CN 105182149B CN 201510450662 A CN201510450662 A CN 201510450662A CN 105182149 B CN105182149 B CN 105182149B
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- detection circuit
- break detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 abstract description 4
- 238000011105 stabilization Methods 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
The invention discloses anti-pinch device break detection circuit between a kind of subway platform door and train body, it is characterised in that including：The resistance branch and safety relay contact branch road being connected to after parallel connection between dc source and signal cable; connect the break detection circuit and IO detection circuits of the signal cable other end; break detection circuit and IO detect circuit to controller feedback voltage signal; controller according to two detection electronic feedbacks come different voltages judge whether signal line intact, whether light curtain system effective; and then the control model of protection system is activated, effectively maintain the stabilization of system, ensure the safety of personnel.
Description
Technical field
The present invention relates to anti-pinch device between subway platform door, more particularly to a kind of subway platform door and train body to break
Detect circuit.
Background technology
According to subway clearance standard, certain interval must be retained between train and gate, to ensure train in regulation bar
Energy safety equipment region under part.If passenger is trapped in the gap, launch train will cause prestige to its life
The side of body.Prior art between gate and train gap it is middle installation light curtain system as anti-pinch device.When there is human body between gap, light
Curtain system can detect that light curtain system sends alarm and starting protection system, so as to reach the purpose of protection passenger life safety.
In general the control model of system is protected to be switched over according to its light curtain system activation signal, activation signal uses gate
All close and locking safety relay output signal.But protected because the signal needs slave unit room to be pulled out to light curtain gap
Protecting system control box.Just in case the signal wire disconnects（Because loosening or other reasonses）.Then being likely to result in detection system will not
Into detection mode, so as to lose function of safety protection.So a kind of safety circuit is developed, to detect whether safety relay breaks
Line is the technical problem of urgent need to resolve in the industry.
The content of the invention
The present invention is to solve the above mentioned problem of prior art, proposes anti-pinch between a kind of subway platform door and train body
Device break detection circuit.
In order to solve the above technical problems, technical scheme proposed by the present invention is a kind of subway platform door of design and train body
Between anti-pinch device break detection circuit, it includes：The resistance branch being connected to after parallel connection between dc source and signal cable
With safety relay contact branch road, break detection circuit and IO detection circuits, the burn out detection for connecting the signal cable other end are electric
Road and IO detection circuits judge whether signal cable breaks accordingly to controller feedback voltage signal, controller, the inspection of its interrupt line
Slowdown monitoring circuit no-voltage signal when signal cable breaks exports, in signal cable connection and the disconnection of safety relay contact branch road
Low level is exported, high level is exported in signal cable connection and the connection of safety relay contact branch road；IO detection circuits are being believed
High level is exported during number cable break, high level is exported when signal cable connection and safety relay contact branch road disconnect,
Low level is exported when signal cable connects and safety relay contact branch road connects.
The resistance branch includes the 21st resistance being connected between DC power anode and signal cable positive pole, with
And the 22nd resistance between dc source earth polar and signal cable negative pole is connected to, break detection circuit and the IO detection
Circuit in parallel is between the signal cable positive pole and earth polar.
Safety relay contact branch road has two pairs of normally opened contacts of safety relay, one pair of which normally opened contact string
Be connected between DC power anode and the signal cable positive pole, wherein another pair normally opened contact be serially connected in dc source earth polar with
Between signal cable negative pole.
The break detection circuit includes bleeder circuit, isolated amplifier and the difference amplifier amplifying circuit of series connection, partial pressure
The input of circuit connects the positive pole and negative pole of the signal cable, and the output end of difference amplifier amplifying circuit connects the control
Device.
The bleeder circuit includes first to fourth resistance, the first to the second electric capacity, signal cable positive pole series connection the
The positive input terminal of the isolated amplifier is accessed after one resistance and the 4th resistance, the signal cable negative pole is connected after second resistance
The isolated amplifier negative input end is accessed, between first resistor and the tie point and isolated amplifier negative input end of the 4th resistance
3rd resistor in parallel and the first electric capacity, the second electric capacity in parallel between isolated amplifier positive input terminal and negative input end.
The difference amplifier amplifying circuit includes the 5th to the 9th resistance, the 3rd to the 5th electric capacity, operational amplifier, described
Isolated amplifier positive output end connect the 6th resistance access operational amplifier positive input terminal, the positive input terminal of operational amplifier with
The 3rd electric capacity and the 8th resistance in parallel, isolated amplifier negative output terminal series connection the 5th resistance access operational amplifier are born between ground
Input, the 4th electric capacity and the 7th resistance in parallel between the negative input end of operational amplifier and the output end of operational amplifier, fortune
The output end for calculating amplifier connects the 9th resistance to controller feedback voltage signal, connects between the output end and ground of operational amplifier
Connect the 5th electric capacity.
IO detection circuit include the 11st to the 15th resistance, the 11st to the 12nd electric capacity, anti-reverse diode,
Photocoupler, signal cable positive pole the 11st resistance of series connection and the 13rd resistance are being connected to photocoupler input just
Pole, the 12nd resistance of the signal cable negative pole series connection connect photocoupler input negative pole, the 11st resistance and the 13rd resistance
Tie point and photocoupler input negative pole between the electric capacity one by one of connection the tenth, photocoupler input positive pole and input negative pole
Between in parallel 12nd electric capacity, the 14th resistance and anti-reverse diode, photocoupler output negative pole ground connection, photoelectric coupling
Pipe output cathode connects the 15th resistance and connects chip power, and photocoupler output cathode feeds back the voltage to controller to be believed
Number.Break detection circuit and IO the detection circuit of the present invention is in signal line broken string, signal line line and safety relay
Its voltage is different during adhesive, controller according to two detection electronic feedbacks come different voltages judge whether signal line intact,
Whether light curtain system is effective, and then activates the control model of protection system, effectively maintains the stabilization of system, has ensured personnel
Safety.
Brief description of the drawings
Fig. 1 is the circuit diagram of present pre-ferred embodiments resistance branch and safety relay contact branch road.
Fig. 2 is the circuit diagram that present pre-ferred embodiments break detection circuit and IO detect circuit.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is described in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not
For limiting the present invention.
Present invention is disclosed anti-pinch device break detection circuit between a kind of subway platform door and train body, it includes：
The resistance branch and safety relay contact branch road being connected to after parallel connection between dc source and signal cable, connect signal cable
Break detection circuit and IO the detection circuit of the other end, break detection circuit and IO detect circuit and believed to controller feedback voltage
Number, controller judges whether signal cable breaks accordingly, wherein break detection circuit no-voltage signal when signal cable breaks
Output, low level is exported in signal cable connection and the disconnection of safety relay contact branch road, in signal cable connection and safety
Relay contact branch road exports high level when connecting；IO detection circuits export high level when signal cable breaks, in signal electricity
High level is exported when cable connects and safety relay contact branch road disconnects, in signal cable connection and safety relay contact branch road
Low level is exported during connection.Evacuation passenger is stopped when train to complete, and will be sent the signal of closed door and gate, is worked as gate
After closing and locking condition reach, relay K1A is activated.When all of platform door system is closed and is locked, this safety after
Electrical equipment adhesive, " activation " dry contact signal is sent to light curtain.Controller plug-in, can according to two detection electronic feedbacks come
Different voltages judge whether signal line is intact, whether light curtain system is effective, and then activate the control model of protection system, effectively
Ground maintains the stabilization of system, has ensured the safety of personnel.
Referring to the preferred embodiment resistance branch shown in Fig. 1 and the circuit diagram of safety relay contact branch road, the resistance
Branch road includes the 21st resistance R21 being connected between DC power anode and signal cable positive pole, and is connected to direct current
The 22nd resistance R22 between power supply earth polar and signal cable negative pole, the break detection circuit and IO detect circuit in parallel
Between the signal cable positive pole and earth polar.Safety relay contact branch road has safety relay K1A two couple normal
Contact is opened, one pair of which normally opened contact is serially connected between DC power anode and the signal cable positive pole, and wherein another pair is normal
Contact is opened to be serially connected between dc source earth polar and signal cable negative pole.When safety relay K1A coil out of power, normally opened contact
All disconnect, R21 and R22 produce the pressure drop reduced, break detection circuit output low level signal, IO detections to dc source 24V
Circuit output high level signal；When safety relay K1A coils obtain electric, normally opened contact is all closed, and R21 and R22 are opened respectively
Contact K1B normally opened contact K1C short circuits, 1-P and 1-N output 24V voltages, break detection circuit output high level signal, IO detections
Circuit output low level signal.In the preferred embodiment, the break detection circuit includes the bleeder circuit of series connection, isolation is put
Big device（U1A）With difference amplifier amplifying circuit, the input of bleeder circuit connects the positive pole and negative pole of the signal cable, difference
The output end of amplifier amplifying circuit connects the controller.
Referring to the break detection circuit shown in Fig. 2 and IO detection circuit circuit diagram, the bleeder circuit include first to
4th resistance, the first to the second electric capacity, after signal cable positive pole series connection first resistor R1 and the 4th resistance R4 described in access
Isolated amplifier U1A positive input terminal, the isolated amplifier is accessed after signal cable negative pole series connection second resistance R2 and is born
3rd resistor R3 and first in parallel between the tie point and isolated amplifier negative input end of input, first resistor and the 4th resistance
Electric capacity C1, the second electric capacity C2 of parallel connection between isolated amplifier positive input terminal and negative input end.The difference amplifier amplifying circuit bag
Include the 5th to the 9th resistance, the 3rd to the 5th electric capacity, operational amplifier UA2, the isolated amplifier U1A positive output ends series connection the
Six resistance R6 access operational amplifier positive input terminal, between the positive input terminal and ground of operational amplifier the 3rd electric capacity C3 in parallel and
8th resistance R8, the negative input end of isolated amplifier negative output terminal series connection the 5th resistance R5 access operational amplifiers, operation amplifier
4th electric capacity C4 and the 7th resistance R7 in parallel between the negative input end of device and the output end of operational amplifier, operational amplifier it is defeated
Go out end the 9th resistance R9 of series connection to controller feedback voltage signal（Actual R9 is connected to the analog/digital conversion mouth of controller）, computing
The 5th electric capacity C5 is connected between the output end and ground of amplifier.
When signal cable disconnects, isolated amplifier U1A does not have input signal, isolated amplifier output 0, by difference
Amplifier amplifying circuit obtains the voltage signal close to 0V, and the output of AD to CPU ends no-voltage signal, i.e. voltage are 0, voltage letter
Number it is considered as low level, logical value 0 in controller.The voltage signal is connected on the analog/digital conversion mouth of controller, and simulation is believed
Number it is changed into digital quantity, normal value of the digital quantity now received less than signal cable when intact, then judges that cable disconnects.
When signal cable is intact, the non-adhesive in safety relay contact, pressure drop of the 24V dc sources on R21 and R22 compared with
Greatly, it is considered as low level, logical value 0 in controller in the voltage signal.The voltage signal is connected on the analog/digital conversion of controller
On mouth, analog signal is changed into digital quantity, the digital quantity now received in range of normal value, is then sentenced when signal cable is intact
Determine that cable is intact and no signal.When signal cable is intact, the adhesive of safety relay contact, 24V dc sources after partial pressure,
Input voltage 0.15V enters isolated amplifier U1A（The isolated amplifier uses 8 times of isolated amplifiers, model HCPL-7840
(amplifier of same type identical parameters can also use)）.Transported again by one 2.5 times of difference after isolated amplifier output 1.2V
Put amplifying circuit and obtain 3V voltage.The voltage signal is considered as high level, logical value 1 in controller.The voltage signal connects
On the analog/digital conversion mouth of controller, analog signal is changed into digital quantity, the digital quantity now received is complete higher than signal cable
Range of normal value when good, then judge that cable is intact and now positive reception signal.
The IO detections circuit includes the 11st to the 15th resistance, the 11st to the 12nd electric capacity, anti-reverse diode
D1, photocoupler U1B, signal cable positive pole series connection the 11st resistance R11 and the 13rd resistance R13 are connected to photoelectricity coupling
Pipe input positive pole is closed, the 12nd resistance R12 of the signal cable negative pole series connection connects photocoupler input negative pole, the 11st resistance
And the 13rd resistance tie point and photocoupler input negative pole between connection the tenth electric capacity C11, photocoupler are defeated one by one
Enter parallel connection the 12nd electric capacity C12, the 14th resistance R14 and anti-reverse diode D1 between positive pole and input negative pole, photoelectricity coupling
Pipe output negative pole ground connection is closed, photocoupler output cathode connects the 15th resistance R15 and connects chip power VCC, photocoupler
Output cathode feeds back the voltage signal to controller.When signal cable disconnects, IO detection circuits can not obtain activation letter
Number, photocoupler U1B cut-offs, VCC is exported and VCC identical high level signals by R15 on TO CPU ends.The voltage is believed
Number it is considered as high level, logical value 1 in controller.When signal cable is intact, the non-adhesive in safety relay contact, 24V direct currents
Pressure drop of the power supply on R21 and R22 is larger, and photocoupler U1B still ends, and high level letter is still exported on TO CPU ends
Number.The voltage signal is considered as high level, logical value 1 in controller.When signal cable is intact, safety relay contact is inhaled
Close, 24V dc sources are added in after partial pressure on U1B input positive pole and input negative pole, U1B conductings, TO CPU current potential quilt
Drag down close to 0.Voltage signal is considered as low level, logical value 0 in controller.Controller is examined according to break detection circuit and IO
The different voltages of slowdown monitoring circuit feedback judge whether signal line is intact, whether light curtain system is effective, and then activate protection system
Control model, so as to effectively maintain the stabilization of system, ensure the safety of personnel.
Above example is by way of example only, non-to provide constraints.It is any without departing from the application spirit and scope, and to it
The equivalent modifications of progress or change, it is intended to be limited solely by among claims hereof scope.
Claims (5)
- A kind of 1. anti-pinch device break detection circuit between subway platform door and train body, it is characterised in that including：After parallel connection The resistance branch and safety relay contact branch road being connected between dc source and signal cable, connect the signal cable other end Break detection circuit and IO detection circuits, break detection circuit and IO detect circuit to controller feedback voltage signal, control Device judges whether signal cable breaks accordingly, whereinBreak detection circuit no-voltage signal when signal cable breaks exports, in signal cable connection and safety relay contact Branch road exports low level when disconnecting, and high level is exported in signal cable connection and the connection of safety relay contact branch road；IO detection circuits export high level when signal cable breaks, and break in signal cable connection and safety relay contact branch road High level is exported when opening, low level is exported in signal cable connection and the connection of safety relay contact branch road;The break detection circuit includes the bleeder circuit of series connection, isolated amplifier（U1A）With difference amplifier amplifying circuit, partial pressure The input of circuit connects the positive pole and negative pole of the signal cable, and the output end of difference amplifier amplifying circuit connects the control Device；The IO detections circuit includes the 11st to the 15th resistance, the 11st to the 12nd electric capacity, anti-reverse diode（D1）、 Photocoupler（U1B）, the 11st resistance of the signal cable positive pole series connection（R11）With the 13rd resistance（R13）It is connected to light It is electrically coupled pipe input positive pole, the 12nd resistance of the signal cable negative pole series connection（R12）Connect photocoupler input negative pole, the tenth The 11st electric capacity is connected between the tie point and photocoupler of one resistance and the 13rd resistance input negative pole（C11）, photoelectricity coupling Close the 12nd electric capacity in parallel between pipe input positive pole and input negative pole（C12）, the 14th resistance（R14）And anti-reverse diode （D1）, photocoupler output negative pole ground connection, photocoupler output cathode the 15th resistance of connection（R15）Connect chip power （VCC）, photocoupler output cathode feeds back the voltage signal to controller.
- 2. anti-pinch device break detection circuit between subway platform door as claimed in claim 1 and train body, its feature exist In：The resistance branch includes the 21st resistance being connected between DC power anode and signal cable positive pole（R21）, with And it is connected to the 22nd resistance between dc source earth polar and signal cable negative pole（R22）, the break detection circuit and IO detects circuit in parallel between the signal cable positive pole and earth polar.
- 3. anti-pinch device break detection circuit between subway platform door as claimed in claim 2 and train body, its feature exist In：Safety relay contact branch road has safety relay（K1A）Two pairs of normally opened contacts, one pair of which normally opened contact string Be connected between DC power anode and the signal cable positive pole, wherein another pair normally opened contact be serially connected in dc source earth polar with Between signal cable negative pole.
- 4. anti-pinch device break detection circuit between subway platform door as claimed in claim 3 and train body, its feature exist In：The bleeder circuit includes first to fourth resistance, the first to the second electric capacity, the signal cable positive pole series connection first resistor （R1）With the 4th resistance（R4）After access the isolated amplifier（U1A）Positive input terminal, signal cable negative pole series connection the Two resistance（R2）After access the tie point and isolated amplifier of the isolated amplifier negative input end, first resistor and the 4th resistance 3rd resistor in parallel between negative input end（R3）With the first electric capacity（C1）, between isolated amplifier positive input terminal and negative input end simultaneously Join the second electric capacity（C2）.
- 5. anti-pinch device break detection circuit between subway platform door as claimed in claim 4 and train body, its feature exist In：The difference amplifier amplifying circuit includes the 5th to the 9th resistance, the 3rd to the 5th electric capacity, operational amplifier（UA2）, it is described Isolated amplifier（U1A）Positive output end the 6th resistance of series connection（R6）The positive input terminal of operational amplifier is accessed, operational amplifier 3rd electric capacity in parallel between positive input terminal and ground（C3）With the 8th resistance（R8）, isolated amplifier negative output terminal the 5th resistance of series connection （R5）The negative input end of operational amplifier is accessed, it is in parallel between the negative input end of operational amplifier and the output end of operational amplifier 4th electric capacity（C4）With the 7th resistance（R7）, output end the 9th resistance of series connection of operational amplifier（R9）To controller feedback voltage Signal, the 5th electric capacity is connected between the output end and ground of operational amplifier（C5）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450662.3A CN105182149B (en) | 2015-07-29 | 2015-07-29 | Anti-pinch device break detection circuit between a kind of subway platform door and train body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450662.3A CN105182149B (en) | 2015-07-29 | 2015-07-29 | Anti-pinch device break detection circuit between a kind of subway platform door and train body |
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| CN105182149A CN105182149A (en) | 2015-12-23 |
| CN105182149B true CN105182149B (en) | 2018-01-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103188A (en) * | 2011-01-27 | 2011-06-22 | 深圳市方大自动化系统有限公司 | Monitoring circuit for safety relay in platform safety door system |
| JP2012103027A (en) * | 2010-11-08 | 2012-05-31 | Yaskawa Electric Corp | Disconnection sign detection system |
| CN202669803U (en) * | 2012-07-17 | 2013-01-16 | 济宁科力光电产业有限责任公司 | Switching signal receiving device for cable-broken self-detecting shielding barrier |
| CN103204169A (en) * | 2013-03-18 | 2013-07-17 | 深圳市方大自动化系统有限公司 | Control system of subway platform shielded gate |
| CN103353569A (en) * | 2013-06-25 | 2013-10-16 | 安徽力高新能源技术有限公司 | Relay connection state detecting apparatus |
| CN104236594A (en) * | 2014-09-25 | 2014-12-24 | 武汉华海通用电气有限公司 | Safety edge state detection circuit |
-
2015
- 2015-07-29 CN CN201510450662.3A patent/CN105182149B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012103027A (en) * | 2010-11-08 | 2012-05-31 | Yaskawa Electric Corp | Disconnection sign detection system |
| CN102103188A (en) * | 2011-01-27 | 2011-06-22 | 深圳市方大自动化系统有限公司 | Monitoring circuit for safety relay in platform safety door system |
| CN202669803U (en) * | 2012-07-17 | 2013-01-16 | 济宁科力光电产业有限责任公司 | Switching signal receiving device for cable-broken self-detecting shielding barrier |
| CN103204169A (en) * | 2013-03-18 | 2013-07-17 | 深圳市方大自动化系统有限公司 | Control system of subway platform shielded gate |
| CN103353569A (en) * | 2013-06-25 | 2013-10-16 | 安徽力高新能源技术有限公司 | Relay connection state detecting apparatus |
| CN104236594A (en) * | 2014-09-25 | 2014-12-24 | 武汉华海通用电气有限公司 | Safety edge state detection circuit |
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| CN105182149A (en) | 2015-12-23 |
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Denomination of invention: Line disconnection detection circuit for anti-clamping device between subway platform door and train body Effective date of registration: 20200709 Granted publication date: 20180123 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: FANGDA ZHICHUANG TECHNOLOGY Co.,Ltd. Registration number: Y2020980003925 |
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