CN106014017A - Central lock controller with relay contact protection function and control method of central lock controller - Google Patents
Central lock controller with relay contact protection function and control method of central lock controller Download PDFInfo
- Publication number
- CN106014017A CN106014017A CN201610556914.5A CN201610556914A CN106014017A CN 106014017 A CN106014017 A CN 106014017A CN 201610556914 A CN201610556914 A CN 201610556914A CN 106014017 A CN106014017 A CN 106014017A
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- Prior art keywords
- relay
- contact
- circuit
- protection
- control signal
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
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- Relay Circuits (AREA)
Abstract
The invention provides a central lock controller with a relay contact protection function. The central lock controller comprises two relay circuits which are connected to the positive pole and the negative pole of a door lock motor correspondingly. Each relay circuit comprises a relay and a relay switch control circuit used for controlling the relay to act, the relay comprises three contacts and a coil, wherein the coil is used for controlling the contacts to act so that the relay can be switched on or switched off. The common contacts of the two relays are connected with the positive pole and the negative pole of the door lock motor correspondingly. The common contacts are connected with the normally-closed contacts. The normally-closed contacts are connected with the anode of a battery. The normally-open contacts are connected with a relay contact protection circuit. The relay switch control circuits are used for controlling the coils to be energized according to relay switch control signals so that the common contacts can make contact with the normally-open contacts. The relay contact protection circuit is used for controlling the normally-open contacts to switch between a high-resistance state and a grounding state according to a relay protection control signal. The central lock controller can be applied to 24 V systematical vehicles, the cost of a door lock control system is reduced, and the system reliability is improved.
Description
Technical field
The present invention relates to technical field of automobile electronic control, specifically a kind of tape relay contact is protected
The central control lock controller protected and control method thereof.
Background technology
The vehicle door lock system of present stage is controlled to be upgraded to electronic type control by initial mechanical type
Stage processed, life-span and reliability have and significantly promote.Electronic type car door lock control system is by three
It is grouped into: 1, logic control part (central control lock controller or BCM) 2, drive part (continue
Electrical appliance kit).3, executable portion (door lock door-lock motor).
The conjunction of logic control part and drive part is had been realized in the vehicle of 12V system
And.Not only reduce parts cost and the assembly cost of car load, also improve door-locking system
Reliability.But, in the vehicle of 24V system, logic control part and drive part
Merge to implement and there is certain difficulty: the relay in relay box belongs to blade inserting relay
Device, central control lock controller to be integrated into is necessary for use PCB relay, and reliability and
Volume energy meets the PCB relay of DC24V system and there is no, PCB on the market
Relay major part is for 12V system.Even if by customization, relay producer is allowed to incite somebody to action
Blade inserting DC24V relay system is made PCB relay, but owing to there is electricity when contact works
Arc discharge phenomenon, and 24V relay volume several times are more than 12V relay, are integrated into middle control
The feasibility of lock controller is substantially zeroed: the PCB relay volume 12mm of general DC12V
* 15mm*12mm, and general DC24V relay volume 30mm*30mm*30mm,
PCB relay volume to be repacked into then may be bigger, central control lock controller peace on vehicle
Dress limited space, it is impossible to have the biggest space to be preserved, therefore the 24VPCB relay of large volume
Device can not be integrated into central control lock controller.Therefore logic control part in 24V vehicle
Merging with drive part there be difficulties involved when from cost and exploitativeness.
Summary of the invention
For deficiencies of the prior art, the present invention provides a kind of tape relay contact to protect
The central control lock controller protected and control method thereof, it can be applicable in 24V vehicle, logical
Cross relay contact protection circuit and central controlled lock relay low cost is integrated in central controlled lock control
Inside device, reduce door lock control system cost, improve system reliability.
The central control lock controller of a kind of tape relay contact protection, including being connected to door lock electricity
The positive pole of machine and the two of negative pole relay circuits, described relay circuit includes relay and control
The relay switch control circuit of the actuating of relay processed, described relay includes three contacts and control
Contact processed action is to form relay adhesive or the coil of closedown, and described three contacts are respectively public affairs
Contact, normally opened contact and normally-closed contact altogether, the common of two relays connects door lock respectively
The positive pole of motor and negative pole, common is connected with normally-closed contact, and normally-closed contact connects anode,
Normally opened contact is connected with relay contact protection circuit, and relay switch control circuit is used for basis
Relay switch control signal control coil obtains and electric make common then connect with normally opened contact
Touching, described relay contact protection circuit is for controlling normally opened according to relay protection control signal
Contact is changed between high-impedance state and ground state.
Further, described relay contact protection circuit includes metal-oxide-semiconductor and controls MOS
Pipe Guan Bi or the on-off circuit disconnected, the drain electrode of metal-oxide-semiconductor and the normally opened contact of two relays
Connecting, the source ground of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor is connected with the outfan of on-off circuit,
Described on-off circuit for receiving relay protect control signal, control metal-oxide-semiconductor conducting or
Close, so that the drain electrode of metal-oxide-semiconductor disconnects with source electrode or is connected, and then make relay
Normally opened contact is changed between high-impedance state and ground state.
Further, described on-off circuit includes audion, divider resistance, the one of divider resistance
End can be accessed by relay protection control signal as signal input part, the other end of divider resistance with
The base stage of audion connects, and the colelctor electrode of audion accesses positive voltage by resistance, audion
Grounded emitter, the colelctor electrode of audion as described on-off circuit signal output part with
The grid of metal-oxide-semiconductor connects.
Further, described audion is NPN type triode, and metal-oxide-semiconductor is N-channel MOS
Pipe.
Further, coil two ends are parallel with fly-wheel diode, anti-for suppress coil to produce
To induction electromotive force.
Further, it is parallel with varistor between positive pole and the negative pole of door-lock motor, is used for pressing down
The induction electromotive force that the outside door-lock motor of system produces.
The control method of the central control lock controller of a kind of tape relay contact protection, uses above-mentioned
Controller is carried out, and described method comprises the steps:
Step one, MCU output relay switch controlling signal give continuing of one of them relay
Electric switch control circuit, relay switch control circuit is according to relay switch control signal control
Coil processed obtains and electric make common then contact with normally opened contact so that relay adhesive, by
It is not received by relay protection control signal in now relay contact protection circuit, normally opened tactile
Point is high-impedance state, and normally-closed contact will not produce atmospherical discharges during being switched to normally opened contact
Phenomenon；
Step 2, after common and normally opened contact completely attach to, MCU output relay
Protection control signal is to relay contact protection circuit, and relay contact protection circuit is according to relay
Normally opened contact is switched to and is connected to ground by device protection control signal, now the positive pole of door-lock motor and
Negative pole produces voltage difference and action.
Further, described step 2 is connect by the on-off circuit in relay contact protection circuit
Receiving described relay protection control signal, described on-off circuit controls according to described relay protection
Signal controls metal-oxide-semiconductor conducting, and then makes normally opened contact be directly grounded.
Further, relay switch control signal and two signals of relay protection control signal
Output time difference is that T1, T1 are determined according to relay 1 adhesive T2 movement time, T1
＞ T2.
Further, when relay returns to off-state from attracting state, MCU first stops
Only output relay protection control signal, then stop output relay switch controlling signal, two
Signal output time difference T3, T3 disconnects T4 movement time according to relay and determines, T3 ＞ T4.
The present invention is by innovative design relay contact protection circuit and coordinates control signal
Logical design, when 24VPCB relay being integrated in central control lock controller being internal, can be effective
Prevent from, during switching between relay contact, atmospherical discharges (electric arc) phenomenon occurs, reduce door lock control
System cost processed, improves system reliability.
Accompanying drawing explanation
Fig. 1 is that the circuit structure of the central control lock controller of tape relay contact protection of the present invention shows
It is intended to.
In figure: 1 relay, 2 relay switch control circuits, 3 relay contacts are protected
Protection circuit, 4 door-lock motors, K1, K2 coil, a1, a2 common, b1, b2
Normally opened contact, c1, c2 normally-closed contact, D1, D2 fly-wheel diode, R1 is pressure-sensitive
Resistance, R2, R3, R4, R5, R6, R7 resistance, C1 electric capacity, 31 metal-oxide-semiconductors,
32 on-off circuits, Q2 audion.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out clear,
It is fully described by.
Fig. 1 show the circuit knot of the central control lock controller of tape relay contact protection of the present invention
Structure schematic diagram, the central control lock controller of described tape relay contact protection includes being connected to door
The positive pole (M+) of lock motor 4 and two relay circuits of negative pole (M-), described relay
Device circuit includes relay 1 and controls the relay switch control circuit 2 of relay 1 action,
Described relay 1 includes three contacts and controls contact action to form relay 1 adhesive or pass
The coil (K1, K2) closed, described three contacts are respectively common (a1, a2), often
Open contact (b1, b2) and normally-closed contact (c1, c2), the common of two relays 1
(a1, a2) connects the positive pole M+ and negative pole M-of door-lock motor 4 respectively, and common (a1,
A2) being connected with normally-closed contact (c1, c2), normally-closed contact (c1, c2) is just directly connecing battery
Pole BAT, normally opened contact (b1, b2) is connected with relay contact protection circuit 3.
Described relay switch control circuit 2 is for receiving relay switch controlling signal, with control
Coil processed (K1, K2) electric after make common (a1, a2) then and normally opened contact
(b1, b2) contacts, and forms relay 1 attracting state, and relay switch control signal disappears
Rear coil (K1, K2) dead electricity, common (a1, a2) then with normally-closed contact (c1,
C2) contact, forms relay 1 closed mode.
Coil (K1, K2) two ends are parallel with fly-wheel diode (D1, D2), are used for suppressing
The reverse induction electromotive force that coil (K1, K2) produces, the positive pole (M+) of door-lock motor 4
And it is parallel with varistor R1 between negative pole (M-), it is used for suppressing outside door-lock motor to produce
Induction electromotive force.
Described relay contact protection circuit 3 includes metal-oxide-semiconductor 31 and controls metal-oxide-semiconductor 31
Guan Bi or the on-off circuit 32 disconnected, the drain electrode of metal-oxide-semiconductor 31 is normal with two relays 1
Opening contact (b1, b2) to connect, the source electrode of metal-oxide-semiconductor 31 passes through resistance R7 ground connection, resistance
The branch road that two ends parallel resistance R6 of R7 and electric capacity C are in series.
The grid of metal-oxide-semiconductor 31 is connected with the outfan of on-off circuit 32, at on-off circuit 32
Output end signal control under, metal-oxide-semiconductor 31 is switched on or off, and metal-oxide-semiconductor 31 turns on
Time metal-oxide-semiconductor 31 grounded drain, metal-oxide-semiconductor 31 conducting close time metal-oxide-semiconductor 31 leakage
Extremely high-impedance state, so can export control signal by on-off circuit 32 so that MOS
The drain electrode of pipe 31, that is the normally opened contact (b1, b2) of two relays 1, in high-impedance state
And switch between ground state.
Described on-off circuit 32 includes audion Q2, divider resistance R3, R4, and relay is protected
(one end of divider resistance R3 is as opening by divider resistance R3, R4 ground connection to protect control signal
Close the signal input part of circuit 32), the node of divider resistance R3, R4 is with audion Q2's
Base stage connects, and the colelctor electrode of audion Q2 accesses positive voltage (such as+24V) by resistance R2,
The grounded emitter of audion Q2, the colelctor electrode of audion Q2 is as described on-off circuit 32
Signal output part be connected with the grid of metal-oxide-semiconductor 31.The colelctor electrode of audion Q2 also can lead to
Cross resistance R5 ground connection.Described on-off circuit 32 mainly realizes on-off action by audion Q2.
Described audion Q2 is NPN type triode, and metal-oxide-semiconductor 31 is N-channel MOS pipe.
The operation principle of the present invention is as follows:
When MCU is not to on-off circuit 32 output relay protection control signal, audion
Q2 ends, and metal-oxide-semiconductor 31 is also at cut-off state, the normally opened contact of two relays 1 (b1,
B2) be off state, normally opened contact (b1, b2) is in high-impedance state.
Output relay switch controlling signal (M+1, M-1) is not had to relay at MCU
During ON-OFF control circuit 2, the common (a1, a2) of two relays 1 and normally-closed contact
(c1, c2) connects, and now positive pole (M+) and the negative pole (M-) of door-lock motor 4 is pressed all
For BAT (+24V), door-lock motor is failure to actuate.
When needs control relay adhesive, MCU output relay switch controlling signal
(M+1, M-1) give relay switch control circuit 2, relay switch control signal (M+1,
M-1) relay 1 adhesive is controlled.
Concrete, when the relay switch control circuit 2 of one of them relay 1 correspondence receives
During relay switch control signal M+1, coil K1 obtains electric so that relay 1 adhesive,
Common a1 transfers to be connected with normally opened contact b1, owing to now normally opened contact b1 is in height
Resistance state, normally-closed contact c1 will not produce atmospherical discharges during being switched to normally opened contact b1 existing
As (electric arc).After common a1 completely attaches to normally opened contact b1, MCU output continues
Electric prospection control signal (CGND_1) gives on-off circuit 32, i.e. controls audion Q2 and leads
Leading to, and then control metal-oxide-semiconductor 31 is also at conducting state, now normally opened contact b1 is (i.e.
CGND) being directly grounded, positive pole (M+) voltage of door-lock motor 4 is become from BAT (24V)
GND (0V), positive pole (M+) voltage of door-lock motor 4 is less than negative pole (M-) voltage,
Producing voltage difference E=-24V, door-lock motor 4 inverts, it is achieved (locking) action of unblanking；With
Reason, when the ON-OFF control circuit 2 of another relay 1 receives relay switch control signal
During M-1, normally opened contact b2 (i.e. CGND) is directly grounded, the negative pole (M-) of door-lock motor 4
Voltage is become GND (0V) from BAT (24V), and negative pole (M-) voltage of door-lock motor 4 is low
In positive pole (M+) voltage, producing voltage difference E=+24V, door-lock motor 4 rotates forward, it is achieved close
Lock (unblanking) action.
MCU elder generation output relay switch controlling signal (M+1, M-1), then output relay
Protection control signal (CGND_1), two signal output time differences are T1, and T1 is according to relay
Device adhesive T2 movement time is determined, T1 ＞ T2.
When relay returns to off-state from attracting state, MCU first stops exporting relay
Device protection control signal (CGND_1) stop again output relay switch controlling signal (M+1,
M-1), signal output time difference T3, T3 disconnects T4 movement time according to relay and determines,
T3 ＞ T4.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also
Being not limited to this, any those skilled in the art of belonging to are at the technology model that the invention discloses
In enclosing, the change that can readily occur in or replacement, all should contain within protection scope of the present invention.
Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (10)
1. the central control lock controller of a tape relay contact protection, it is characterised in that: include
It is connected to the positive pole (M+) of door-lock motor (4) and two relays of negative pole (M-)
Device circuit, described relay circuit includes relay (1) and controls relay (1) action
Relay switch control circuit (2), described relay (1) includes three contacts and controls to touch
Point action to form relay (1) adhesive or the coil (K1, K2) of closedown, described three
Contact be respectively common (a1, a2), normally opened contact (b1, b2) and normally-closed contact (c1,
C2), the common (a1, a2) of two relays (1) connects door-lock motor (4) respectively
Positive pole (M+) and negative pole (M-), common (a1, a2) and normally-closed contact (c1,
C2) connecting, normally-closed contact (c1, c2) connects anode, normally opened contact (b1, b2) with
Relay contact protection circuit (3) connects, and relay switch control circuit (2) is used for basis
Relay switch control signal (M+1, M-1) control coil (K1, K2) electric must make public affairs
Contact (a1, a2) transfers to contact with normally opened contact (b1, b2) altogether, described relay contact
Protection circuit (3) is for controlling normally opened contact (b1, b2) according to relay protection control signal
Change between high-impedance state and ground state.
2. the central control lock controller of tape relay contact protection as claimed in claim 1, its
Be characterised by: described relay contact protection circuit (3) include metal-oxide-semiconductor (31) and
Control the on-off circuit (32) that metal-oxide-semiconductor (31) closes or disconnects, metal-oxide-semiconductor (31)
Drain electrode is connected with the normally opened contact (b1, b2) of two relays (1), metal-oxide-semiconductor (31)
Source ground, the grid of metal-oxide-semiconductor (31) is connected with the outfan of on-off circuit (32),
Described on-off circuit (32) protects control signal for receiving relay, controls metal-oxide-semiconductor (31)
On and off so that the drain electrode of metal-oxide-semiconductor (31) and source electrode disconnect or be connected, enter
And make the normally opened contact (b1, b2) of relay (1) high-impedance state and ground state it
Between change.
3. the central control lock controller of tape relay contact protection as claimed in claim 2, its
It is characterised by: described on-off circuit (32) includes audion (Q2), divider resistance, dividing potential drop
One end of resistance can be accessed by relay protection control signal as signal input part, divider resistance
The other end is connected with the base stage of audion (Q2), and the colelctor electrode of audion (Q2) is by electricity
Resistance (R2) accesses positive voltage, the grounded emitter of audion (Q2), audion (Q2)
Colelctor electrode as signal output part and the metal-oxide-semiconductor (31) of described on-off circuit (32)
Grid connects.
4. the central control lock controller of tape relay contact protection as claimed in claim 1, its
Being characterised by: described audion (Q2) is NPN type triode, metal-oxide-semiconductor (31) is N
Channel MOS tube.
5. the central control lock controller of tape relay contact protection as claimed in claim 1, its
It is characterised by: coil (K1, K2) two ends are parallel with fly-wheel diode (D1, D2), uses
In the reverse induction electromotive force that suppression coil (K1, K2) produces.
6. the central control lock controller of tape relay contact protection as claimed in claim 1, its
It is characterised by: be parallel with between positive pole (M+) and the negative pole (M-) of door-lock motor (4)
Varistor (R1), for the induction electromotive force suppressing outside door-lock motor to produce.
7. a control method for the central control lock controller of tape relay contact protection, its feature
Be to use controller according to any one of claim 1-6 to carry out, described method include as
Lower step:
Step one, MCU output relay switch controlling signal (M+1, M-1) give wherein
The relay switch control circuit (2) of one relay (1), relay switch control circuit
(2) according to relay switch control signal (M+1, M-1) control coil (K1, K2)
Electric must make common (a1, a2) then contact with normally opened contact (b1, b2) so that
Relay (1) adhesive, owing to now relay contact protection circuit (3) is not received by continuing
Electric prospection control signal, normally opened contact (b1, b2) is high-impedance state, normally-closed contact (c1,
C2) atmospherical discharges phenomenon will not be produced during being switched to normally opened contact (b1, b2)；
Step 2, connect completely with normally opened contact (b1, b2) when common (a1, a2)
After touch, MCU output relay protection control signal (CGND_1) is protected to relay contact
Protection circuit (3), relay contact protection circuit (3) is according to relay protection control signal
(CGND_1) normally opened contact (b1, b2) is switched to it is connected to ground, now door-lock motor
(4) positive pole (M+) and negative pole (M-) produce voltage difference and action.
8. the control of the central control lock controller of tape relay contact protection as claimed in claim 7
Method processed, it is characterised in that: by relay contact protection circuit (3) in described step 2
On-off circuit (32) receive described relay protection control signal (CGND_1), described
On-off circuit (32) controls MOS according to described relay protection control signal (CGND_1)
Pipe (31) conducting, and then make normally opened contact (b1, b2) be directly grounded.
9. the control of the central control lock controller of tape relay contact protection as claimed in claim 7
Method processed, it is characterised in that: relay switch control signal (M+1, M-1) and relay
Protection control signal (CGND_1) two signal output time differences are T1, and T1 is according to relay
Device 1 adhesive T2 movement time is determined, T1 ＞ T2.
10. the central control lock controller of tape relay contact protection as claimed in claim 7
Control method, it is characterised in that: when relay (1) returns to off-state from attracting state
Time, MCU first stops output relay protection control signal (CGND_1), then stops output
Relay switch control signal (M+1, M-1), two signal output time differences T3, T3 root
Disconnect T4 movement time according to relay to determine, T3 ＞ T4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610556914.5A CN106014017A (en) | 2016-07-15 | 2016-07-15 | Central lock controller with relay contact protection function and control method of central lock controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610556914.5A CN106014017A (en) | 2016-07-15 | 2016-07-15 | Central lock controller with relay contact protection function and control method of central lock controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106014017A true CN106014017A (en) | 2016-10-12 |
Family
ID=57118218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610556914.5A Pending CN106014017A (en) | 2016-07-15 | 2016-07-15 | Central lock controller with relay contact protection function and control method of central lock controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106014017A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786409A (en) * | 2016-12-30 | 2017-05-31 | 西安奇维科技有限公司 | A kind of contact protection method based on power source for relay control reversion |
| CN108111152A (en) * | 2018-02-23 | 2018-06-01 | 安徽安凯汽车股份有限公司 | A kind of bus occupant gate test automatic switching circuit |
| CN108695833A (en) * | 2018-06-30 | 2018-10-23 | 昌辉汽车电气系统（安徽）有限公司 | Vehicle-mounted relay protection control circuit in 24V bodywork systems and method |
| CN110836055A (en) * | 2018-08-15 | 2020-02-25 | 上海汽车集团股份有限公司 | Control circuit for vehicle |
| CN115405169A (en) * | 2022-09-01 | 2022-11-29 | 中车南京浦镇车辆有限公司 | Subway door control circuit and door control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09256698A (en) * | 1996-03-26 | 1997-09-30 | Nissan Shatai Co Ltd | Door lock device |
| CN201447970U (en) * | 2009-06-03 | 2010-05-05 | 吴传文 | Control circuit of centrally controlled lock |
| CN205875982U (en) * | 2016-07-15 | 2017-01-11 | 武汉神动汽车电子电器股份有限公司 | Take central lock controller of relay contact points protection |
-
2016
- 2016-07-15 CN CN201610556914.5A patent/CN106014017A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09256698A (en) * | 1996-03-26 | 1997-09-30 | Nissan Shatai Co Ltd | Door lock device |
| CN201447970U (en) * | 2009-06-03 | 2010-05-05 | 吴传文 | Control circuit of centrally controlled lock |
| CN205875982U (en) * | 2016-07-15 | 2017-01-11 | 武汉神动汽车电子电器股份有限公司 | Take central lock controller of relay contact points protection |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786409A (en) * | 2016-12-30 | 2017-05-31 | 西安奇维科技有限公司 | A kind of contact protection method based on power source for relay control reversion |
| CN106786409B (en) * | 2016-12-30 | 2019-01-22 | 西安奇维科技有限公司 | A kind of contact protection method based on power source for relay control reversion |
| CN108111152A (en) * | 2018-02-23 | 2018-06-01 | 安徽安凯汽车股份有限公司 | A kind of bus occupant gate test automatic switching circuit |
| CN108111152B (en) * | 2018-02-23 | 2023-10-13 | 安徽安凯汽车股份有限公司 | Automatic switching circuit for passenger door test of passenger car |
| CN108695833A (en) * | 2018-06-30 | 2018-10-23 | 昌辉汽车电气系统（安徽）有限公司 | Vehicle-mounted relay protection control circuit in 24V bodywork systems and method |
| CN110836055A (en) * | 2018-08-15 | 2020-02-25 | 上海汽车集团股份有限公司 | Control circuit for vehicle |
| CN115405169A (en) * | 2022-09-01 | 2022-11-29 | 中车南京浦镇车辆有限公司 | Subway door control circuit and door control method |
| CN115405169B (en) * | 2022-09-01 | 2023-11-03 | 中车南京浦镇车辆有限公司 | Subway car door control circuit and car door control method |
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Application publication date: 20161012 |