CN205116997U - Passenger car lock control unit - Google Patents

Passenger car lock control unit Download PDF

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Publication number
CN205116997U
CN205116997U CN201520803399.7U CN201520803399U CN205116997U CN 205116997 U CN205116997 U CN 205116997U CN 201520803399 U CN201520803399 U CN 201520803399U CN 205116997 U CN205116997 U CN 205116997U
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CN
China
Prior art keywords
mcu
base chip
passenger car
control unit
output
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201520803399.7U
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Chinese (zh)
Inventor
夏大卫
马永军
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United Automotive Electronic Systems Co Ltd
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United Automotive Electronic Systems Co Ltd
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Priority to CN201520803399.7U priority Critical patent/CN205116997U/en
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Publication of CN205116997U publication Critical patent/CN205116997U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses a passenger car lock control unit, include: MCU passes through SPI bus and RESET control line connected system basis chip, and lock relay input is connected through forcing the unblock module to system's basis chip, the SPI bus is used for transmitting MCU to the setting parameters and the MCU status signal of system's basis chip, and the RESET control line is used for transmitting reset signal, and system's basis chip has regularly detection circuitry and can provide the 5V power of MCU state, whether system's basis chip can detect MCU and become invalid and provided MCU reset signal, and whether system's basis chip became invalid according to MCU and whether ignition switch 0N shelves state judgement exports the unblock signal to forcing the unblock module. The utility model discloses another kind of passenger car lock control unit is still provided. The utility model discloses a passenger car lock control unit can guarantee the unblock of passenger car lock safety under the passenger car MCU inefficacy circumstances.

Description

Passenger car doorlock control unit
Technical field
The utility model relates to vehicle electric field, particularly relates to a kind of doorlock control unit of passenger car.
Background technology
Existing passenger car adopts the doorlock control unit of main flow (abbreviation gate) controlling to unlock, lock or super lock time usually adopt control mode as shown in Figure 1.Namely, the control signal sent by doorlock control unit collection user, for example control switch in door lock, wireless key signal, mechanical lock switch etc., the electronic control unit (hereinafter referred to as MCU) in doorlock control unit is according to the signal collected, after carrying out logical operation by software, send drive singal to relay module, by relay module output voltage/electric current, door-lock motor execution is locked accordingly, is unlocked or super lock action.
Mainly there are following two kinds of defects in the defect of existing doorlock control unit control mode:
One, all controlling functions all depend on its core devices MCU, if MCU breaks down, or the software program of its inherence breaks down (MCU inefficacy), and gate can lose the drived control to door-lock motor.This kind of situation is called the failure mode of door lock, under failure mode, if there is the situation that can not unlock, there is potential safety hazard, such as under accident or vehicle be about to the situations such as water inlet, cause user not unlock and leave vehicle.
If when there is mechanical viscous in the motor drive module (relay) two, in gate, the driver module viscous if lock, then door-lock motor locked always direction drive, potential safety hazard can be produced equally, under for example accident or vehicle are about to the situations such as water inlet, cause user not unlock and leave vehicle.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of doorlock control unit of the passenger car that can unlock safely under passenger car doorlock control unit MCU failure conditions.
Another technical problem to be solved in the utility model is to provide a kind of doorlock control unit that can unlock safely under passenger car doorlock control unit MCU lost efficacy or in passenger car gate, mechanical viscous situation occurs motor drive module (relay).
The first passenger car doorlock control unit that the utility model provides can unlock safely under passenger car doorlock control unit MCU failure conditions, comprising: MCU, system base chip, compulsive unlocking module and door lock relay;
MCU is by spi bus and RESET control line connected system base chip, and system base chip is by compulsive unlocking model calling door lock relay input;
Spi bus is for transmitting MCU to the parameters of system base chip and MCU status signal, RESET control line is for transmitting reset signal, the transmission of enable signal line unlocks enable signal, and system base chip has MCU state timely checking circuit and can provide 5V power supply;
Whether system base chip can detect MCU and lost efficacy and provided MCU reset signal, and whether system base chip lost efficacy according to MCU and whether ignition switch 0N shelves condition adjudgement exports unlocking signal to compulsive unlocking module.
The second passenger car doorlock control unit that the utility model provides can unlock safely under passenger car MCU loses efficacy or in passenger car gate, mechanical viscous situation occurs motor drive module (relay), it also comprises: an Acquisition Circuit on the basis of the first passenger car doorlock control unit above-mentioned; Door lock relay two output connects Acquisition Circuit, Acquisition Circuit can detect door lock relay output end level and this level is sent to MCU, the relay output end level received and MCU logic control instruction compare by MCU, and whether MCU controls door lock relay according to comparative result and unblank.
Further improvement, Acquisition Circuit is when collecting high level and MCU logic control instruction does not export high level, and MCU forces opening door lock relay two output ports simultaneously, makes two output port equipotentials.
Further improvement, after door lock relay two output port equipotentials, closes the output of door lock relay, disconnects and unlock relay output when Acquisition Circuit detects low level.
Due to the time (being generally less than 100ms) that motor rotation is very little, just can form actual frame for movement to lock, so for relay high level feedback port, interrupt input or sampling time is preferably adopted to be adjusted to extremely short (being less than 100ms), the holding circuit that then takes immediate measure two ends equipotential.After the equipotential of motor two ends, gate can also attempt recovery policy.First close the output of relay of locking, detect and be fed back to low level, represent lock relay not viscous time, then disconnect and unlock relay and export, System recover is normal afterwards, and function can reuse.
Further improvement, the feedback collection of described relay high level output end adopts interrupt input.
Further improvement, described Acquisition Circuit sampling time interval is less than or equal to 10ms.
Described Acquisition Circuit has two collection terminals and two outputs, comprising: first resistance one end as this Acquisition Circuit the first collection terminal other end as this Acquisition Circuit the first output and by the 3rd resistance eutral grounding; Second resistance one end as this Acquisition Circuit the second collection terminal other end as this this collector the second output and by the 4th resistance eutral grounding; First collection terminal is by the first diode ground connection, and the second collection terminal is by the second diode ground connection.
Further improvement, MCU sends MCU status signal (utilize house dog patrol and examine) by spi bus to system base chip by setting-up time interval, if system base chip time-out does not receive MCU status signal (being equivalent to feeding-dog signal), then system base chip judges MCU fault/software fault (MCU inefficacy), by RESET control line first time reset MCU record this reset;
If system base chip receives MCU status signal after first time MCU resets, remove first time MCU reset record;
If system base chip still cannot receive MCU status signal after first time MCU resets, then start limp-home mode until system base chip receives MCU status signal;
During limp-home mode and ignition switch 0N shelves, system base chip controls compulsive unlocking module compulsive unlocking.Compulsive unlocking: during limp-home mode and vehicle is in ON shelves, after system base chip sends control signal LIMPHOME, and Power supply is effective, the built-in timer of this compulsive unlocking module, export an about 500ms high level pulse, drive lock motor to unlock, export after 500ms and close.This compulsive unlocking module just completes a successful unlock according to effective control signal input like this.
A kind of compulsive unlocking module that the utility model provides comprises:
One power supply connect car load power supply and with impulse generator UNICOM;
One RC circuit and impulse generator UNICOM, the control signal that impulse generator receiving system base chip sends output drive signal are to door-lock motor.
The direct Gather and input signal of existing passenger car doorlock control unit MCU, after being converted to logic output, driver output circuit, door lock controlling functions.Existing passenger car doorlock control unit, if MCU lost efficacy, user can directly lose these functions, reduced satisfaction; If MCU occurs under car door lock situation lost efficacy, directly lose electronic unlocking function, cause user by locked in car, above-mentioned two situations also cause the potential safety hazard in the stranded car of user.
The first passenger car doorlock control unit that the utility model provides, first for the detection of door lock driving element, that can effectively avoid driving element to lose efficacy and cause locks by mistake.Secondly, use system base chip to MCU implementing monitoring, monitoring MCU state (whether losing efficacy), and by system base chip in conjunction with limp-home mode compulsive unlocking module, after MCU lost efficacy, this compulsive unlocking module can be made to enter effective model, ensure unlocking function, prevent from, by locked for the user situation in car, avoiding potential safety hazard, improve vehicle safety.
The second passenger car doorlock control unit that the utility model provides increases Acquisition Circuit on the basis being the first passenger car doorlock control unit above-mentioned, by to door lock relay two output level detection, the relay output end level received and MCU logic control instruction compare and judge whether relay viscous occurs by MCU, and whether MCU controls door lock relay according to comparative result and unblank.The second passenger car doorlock control unit of the present utility model safety can unlock under passenger car doorlock control unit MCU lost efficacy or in passenger car gate, mechanical viscous situation occurs motor drive module (relay), ensure unlocking function, prevent locked for the user situation in car, avoid potential safety hazard, improve vehicle safety.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail:
Fig. 1 is a kind of structural representation of existing passenger car doorlock control unit.
Fig. 2 is the structural representation of the first passenger car doorlock control unit embodiment that the utility model provides.
Fig. 3 is the structural representation of the second passenger car doorlock control unit embodiment that the utility model provides.
Fig. 4 is system base chip one embodiment pin assignment schematic diagram.
Fig. 5 is the structural representation of the utility model Acquisition Circuit one embodiment.
Fig. 6 is the structural representation of compulsive unlocking module one embodiment that the utility model provides.
Description of reference numerals
Door lock bridge type relay two input A, B
Door lock bridge type relay two output C, D
Acquisition Circuit Monitor
System base chip SBC
Compulsive unlocking module LIMPHOMELOGIC
Timely checking circuit TimeCounter
Power supply KL15, KL30, Ubat
Impulse generator Pulse
Door lock bridge type relay RelayCoilDriver
First, second collection terminal of Acquisition Circuit E, F
First, second output of Acquisition Circuit G, H
Detailed description of the invention
As shown in Figure 2, the passenger car doorlock control unit that can unlock safely under passenger car doorlock control unit MCU failure conditions that the utility model provides, an embodiment comprises: MCU, system base chip, compulsive unlocking module and door lock bridge type relay;
MCU connects door lock bridge type relay input A, B by spi bus and RESET control line connected system base chip SBC, system base chip SBC by compulsive unlocking module LIMPHOMELOGIC;
There is provided the possible embodiments of a kind of system base chip SBC, the interface pin distribution of system base chip SBC and MCU, as shown in Figure 4; In this embodiment, system base chip SBC adopts NXP to produce IC chip UJA107X series; Wherein pin 9,10,11 is spi bus line, be connected with the SPI mouth of MCU, pin 6 is resetting pin (RESET), be connected with the resetting pin (RESET) of MCU, pin 17 is LIMPHOME enable signal line, so just constitutes system base chip SBC basic connection in this application.Pin other than the above has other functions in system base chip SBC, because " the limp-home function " that propose with the application does not have direct relation, belongs to the intrinsic pin of this chip (conventional using method, shown in reference table 1) and repeats no more herein.
1 2 3 4 5 6 7 8
TXDL2 RXDL2 TXDL1 V1 RXDL1 RSTN INTN EN
9 10 11 12 13 14 15 16
SDI SDO SCK SCSN TXDC RXDC TEST1 WDOFF
17 18 19 20 21 22 23 24
LIMP WAKE1 WAKE2 V2 CANH CANL GND SPLIT
25 26 27 28 29 30 31 32
LIN1 DLIN LIN2 WBIAS VEXCC TEST2 VEXCTRL BAT
Table 1
Spi bus is used for MCU to system base chip SBC parameters and transmission MCU status signal, RESET control line transmission reset signal, enable signal line LIMPHOME transmits and unlocks enable signal, and system base chip SBC has MCU state timely checking circuit TimeCounter and can provide 5V power supply;
Whether system base chip SBC can detect MCU and lost efficacy and provided MCU reset signal, and whether system base chip SBC lost efficacy according to MCU and whether ignition switch 0N shelves condition adjudgement exports unlocking signal to compulsive unlocking module LIMPHOMELOGIC;
MCU sends MCU status signal (utilize house dog patrol and examine) by spi bus to system base chip SBC by setting-up time interval, if system base chip SBC time-out does not receive MCU status signal (being equivalent to feeding-dog signal), then system base chip SBC judges MCU fault/software fault (MCU inefficacy), by RESET control line first time reset MCU record this reset; If system base chip SBC receives MCU status signal after first time MCU resets, remove first time MCU reset record; If system base chip SBC still cannot receive MCU status signal after first time MCU resets, then start limp-home mode until system base chip SBC receives MCU status signal; During limp-home mode and ignition switch 0N shelves, system base chip SBC controls compulsive unlocking module LIMPHOMELOGIC and controls door lock bridge type relay compulsive unlocking;
Compulsive unlocking function has been come by a compulsive unlocking module LIMPHOMELOGIC, and its input derives from the control signal LIMPHOME and the input of ignition switch ON shelves that system base chip SBC provides, and its output directly controls to unlock relay.When system base chip SBC detects that MCU lost efficacy, after providing control signal LIMPHOME, if now vehicle is in ON shelves, then this compulsive unlocking module forces output 500ms high level to unblock relay, the compulsive unlocking function under making gate complete MCU inefficacy.
As shown in Figure 3, doorlock control unit one embodiment that can unlock safely under passenger car MCU lost efficacy or in passenger car gate, mechanical viscous situation occurs motor drive module (relay) that the utility model provides, the basis of the first embodiment also comprises: an Acquisition Circuit Monitor, MCU connects door lock bridge type relay two input A, B, door lock bridge type relay two output C, D connect Acquisition Circuit Monitor, Acquisition Circuit Monitor feedback signal to described MCU; The relay output end level received and MCU logic control instruction compare by MCU, and whether MCU controls door lock bridge type relay according to comparative result and unblank.
Acquisition Circuit Monitor can detect door lock bridge type relay output level (such as high level) and this level is sent to MCU, the door lock bridge type relay output level received and MCU logic control instruction (whether requiring to export high level) compare by MCU, and whether MCU controls door lock bridge type relay according to comparative result and unblank.
Acquisition Circuit Monitor is when collecting high level and MCU logic control instruction does not export high level, and MCU forces opening door lock bridge type relay two output ports C, D simultaneously, makes two output port C, D equipotentials;
Due to the time (being generally less than 100ms) that motor rotation is very little, just can form actual frame for movement to lock, so for relay high level feedback port, preferably adopt interrupt input or sampling time to be adjusted to extremely short, then take immediate measure and keep bridge circuit two ends equipotential.After the equipotential of motor two ends, gate can also attempt recovery policy.First close the output of relay of locking, detect and be fed back to low level, represent lock relay not viscous time, then disconnect and unlock relay and export, System recover is normal afterwards, and unlocking function can reuse;
Further improvement, described door lock bridge type relay high level output end adopts interrupt input or described Acquisition Circuit Monitor that sampling time interval also can be adopted to be less than or equal to the form of 10ms.
As shown in Figure 5, the utility model Acquisition Circuit one embodiment, Acquisition Circuit has two collection terminals E, F and two outputs G, H, first resistance R1 one end as this Acquisition Circuit the first collection terminal E other end as this Acquisition Circuit the first output G and by the 3rd resistance R3 ground connection; Second resistance R2 one end as this Acquisition Circuit the second collection terminal F other end as this this collector the second output H and by the 4th resistance R4 ground connection; First collection terminal E is by the first diode D1 ground connection, and the second collection terminal F is by the second diode D2 ground connection.
During the work of this Acquisition Circuit, its first, second collection terminal connects door lock bridge type relay two outputs, and its first, second output exports collection signal to MCU.
As shown in Figure 6, a kind of compulsive unlocking module LIMPHOMELOGIC that the utility model provides comprises:
One power supply KL15 connect car load power supply and with impulse generator Pulse UNICOM;
One RC circuit and impulse generator Pulse UNICOM, the control signal LIMPHOME that impulse generator Pulse receiving system base chip SBC sends output drive signal are to door-lock motor.
Below through the specific embodiment and the embodiment the utility model has been described in detail, but these are not formed restriction of the present utility model.When not departing from the utility model principle, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection domain of the present utility model.

Claims (9)

1. a passenger car doorlock control unit, is characterized in that, comprising: MCU, system base chip, compulsive unlocking module and door lock relay;
MCU is by spi bus and RESET control line connected system base chip, and system base chip connects compulsive unlocking module by enable signal line, compulsive unlocking model calling door lock relay input;
Spi bus is for transmitting MCU to the parameters of system base chip and MCU status signal, RESET control line is for transmitting reset signal, the transmission of enable signal line unlocks enable signal, and system base chip has MCU state timely checking circuit and can provide 5V power supply;
Whether system base chip can detect MCU and lost efficacy and provided MCU reset signal, and whether system base chip lost efficacy according to MCU and whether ignition switch 0N shelves condition adjudgement exports unlocking signal to compulsive unlocking module.
2. passenger car doorlock control unit as claimed in claim 1, is characterized in that, also comprise: an Acquisition Circuit,
Door lock relay two output connects Acquisition Circuit, Acquisition Circuit can detect door lock relay output end level and this level is sent to MCU, the relay output end level received and MCU logic control instruction compare by MCU, and whether MCU controls door lock relay according to comparative result and unblank.
3. passenger car doorlock control unit as claimed in claim 2, is characterized in that:
Described Acquisition Circuit is when collecting high level and MCU logic control instruction does not export high level, and MCU forces opening door lock relay two output ports simultaneously, makes two output port equipotentials.
4. passenger car doorlock control unit as claimed in claim 3, is characterized in that:
After door lock relay two output port equipotentials, close the output of door lock relay, disconnect when Acquisition Circuit detects low level and unlock relay output.
5. passenger car doorlock control unit as claimed in claim 2, is characterized in that: the feedback collection of described door lock relay high level output end adopts interrupt input.
6. passenger car doorlock control unit as claimed in claim 2, is characterized in that: described Acquisition Circuit sampling time interval is less than or equal to 10ms.
7. passenger car doorlock control unit as claimed in claim 2, it is characterized in that: described Acquisition Circuit has two collection terminals and two outputs, comprising: first resistance one end as this Acquisition Circuit the first collection terminal other end as this Acquisition Circuit the first output and by the 3rd resistance eutral grounding; Second resistance one end as this Acquisition Circuit the second collection terminal other end as this this collector the second output and by the 4th resistance eutral grounding; First collection terminal is by the first diode ground connection, and the second collection terminal is by the second diode ground connection.
8. the passenger car doorlock control unit as described in claim 1 to 7 any one, it is characterized in that: MCU sends MCU status signal by spi bus to system base chip by setting-up time interval, if system base chip time-out does not receive MCU status signal, then system base chip judges MCU fault/software fault, by RESET control line first time reset MCU record this reset;
If system base chip receives MCU status signal after first time MCU resets, remove first time MCU reset record;
If system base chip still cannot receive MCU status signal after first time MCU resets, then start limp-home mode until system base chip receives MCU status signal;
During limp-home mode and ignition switch 0N shelves, system base chip controls compulsive unlocking module compulsive unlocking.
9. the passenger car doorlock control unit as described in claim 1 to 7 any one, is characterized in that:
Compulsive unlocking module comprises:
One power supply connect car load power supply and with impulse generator UNICOM;
One RC circuit and impulse generator UNICOM, the control signal that impulse generator receiving system base chip sends output drive signal are to door-lock motor.
CN201520803399.7U 2015-10-16 2015-10-16 Passenger car lock control unit Withdrawn - After Issue CN205116997U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520803399.7U CN205116997U (en) 2015-10-16 2015-10-16 Passenger car lock control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520803399.7U CN205116997U (en) 2015-10-16 2015-10-16 Passenger car lock control unit

Publications (1)

Publication Number Publication Date
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106379202A (en) * 2016-08-31 2017-02-08 安徽通宇电子股份有限公司 Intelligent seat control system
CN106593147A (en) * 2015-10-16 2017-04-26 联合汽车电子有限公司 Passenger car door lock control unit
CN110836055A (en) * 2018-08-15 2020-02-25 上海汽车集团股份有限公司 Control circuit for vehicle
CN111113138A (en) * 2018-10-31 2020-05-08 兄弟工业株式会社 Door opening/closing device and machine tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106593147A (en) * 2015-10-16 2017-04-26 联合汽车电子有限公司 Passenger car door lock control unit
CN106593147B (en) * 2015-10-16 2019-08-13 联合汽车电子有限公司 Passenger car doorlock control unit
CN106379202A (en) * 2016-08-31 2017-02-08 安徽通宇电子股份有限公司 Intelligent seat control system
CN110836055A (en) * 2018-08-15 2020-02-25 上海汽车集团股份有限公司 Control circuit for vehicle
CN111113138A (en) * 2018-10-31 2020-05-08 兄弟工业株式会社 Door opening/closing device and machine tool

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AV01 Patent right actively abandoned

Granted publication date: 20160330

Effective date of abandoning: 20190813

AV01 Patent right actively abandoned