CN209938537U

CN209938537U - Automobile fingerprint unlocking device integrated with automobile key

Info

Publication number: CN209938537U
Application number: CN201920531260.XU
Authority: CN
Inventors: 李春宇; 朱成元; 贾福禄; 刘洋; 张中成
Original assignee: University of Science and Technology Liaoning USTL
Current assignee: University of Science and Technology Liaoning USTL
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2020-01-14
Anticipated expiration: 2029-04-18

Abstract

The utility model provides an automobile fingerprint unlocking device integrated with an automobile key, which comprises a fingerprint module and a first main control MCU unit; the automobile remote control key circuit and the CAN bus transceiver are also included; fingerprint module, car remote control key circuit and CAN bus transceiver all are connected with first master control MCU unit, and CAN bus transceiver is connected with car CAN bus port communication. The automobile remote control key circuit comprises a second main control MCU unit, an automobile remote control key chip, an RF transmitting chip and a three-axis antenna which are connected in sequence. The remote control key circuit of the automobile is integrated in the fingerprint unlocking device, the unlocking and locking functions of the remote control key are directly realized by using the fingerprint identification function, the remote control key circuit is completely the same as the remote control key of the automobile, the control system in the automobile does not need to be changed, and the remote control key circuit can be used for changing the automobile which leaves the factory. After fingerprint verification, a remote control key does not need to be sensed, and a vehicle owner can unlock the vehicle without carrying the remote control key.

Description

Automobile fingerprint unlocking device integrated with automobile key

Technical Field

The utility model relates to a car intelligent control field, in particular to car fingerprint unlocking means of integrated car key.

Background

At present, the car has gone into every family, and the car quantity also greatly increased, and among the prior art, there has car fingerprint unlocking device, for example: the publication number is: chinese patent CN 208429054U discloses an automobile fingerprint unlocking device. Chinese patent publication No. CN 207389147U discloses an intelligent alarm anti-theft door lock system for an automobile, however, the above-mentioned fingerprint unlocking device still has the following technical problems:

the publication number is: CN 208429054U and chinese patent with publication number CN 207389147U need to change the control system of the vehicle itself, otherwise, unlocking and starting cannot be realized, and when implementing, the control circuit of the vehicle needs to be changed, which is inconvenient to implement and not suitable for modifying the vehicle that has been delivered from the factory.

Disclosure of Invention

In order to overcome the defects in the background art, the utility model provides an automobile fingerprint unlocking device integrated with an automobile key, which integrates a remote control key circuit of an automobile into a fingerprint unlocking device, 1) directly realizes the unlocking and locking functions of the remote control key by using a fingerprint identification function, has the same function as the remote control key of the automobile, does not need to change a control system in the automobile, and can be used for the remanufacturing of the automobile which is delivered from the factory; 2) after fingerprint verification, a remote control key does not need to be sensed, and a vehicle owner can unlock the vehicle without carrying the remote control key.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an integrated car key's car fingerprint unlocking means, includes fingerprint module, a master control MCU unit.

The utility model discloses still include car remote control key circuit and CAN bus transceiver. Fingerprint module, car remote control key circuit and CAN bus transceiver all are connected with first master control MCU unit, and CAN bus transceiver is connected with car CAN bus port communication.

The automobile remote control key circuit comprises a second main control MCU unit, an automobile remote control key chip and a three-axis antenna which are sequentially connected, and further comprises an RF transmitting chip connected with the automobile remote control key chip.

Further, still be connected with emergency signal control analog switch chip between car remote control key chip and the triaxial antenna, the second master control MCU unit is connected to emergency signal control analog switch chip's control end, the output of arbitrary one of them axle of signal input part connection car remote control key chip, emergency signal control analog switch chip's signal output part is connected to the signal input part of triaxial antenna, emergency signal control analog switch is used for breaking off the induction antenna of key, prevents the emergent start of key under the condition of outage.

Furthermore, the first main control MCU unit is also connected with an LIN bus transceiver, and the LIN bus transceiver is in communication connection with an automobile LIN bus port.

Furthermore, the first main control MCU unit is also connected with one or more of a GPRS communication module and a Bluetooth module.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the utility model integrates the remote control key circuit of the automobile into the fingerprint unlocking device, directly realizes the unlocking and locking functions of the remote control key by using the fingerprint identification function, has the same function with the remote control key of the automobile, and does not need to change the control system in the automobile; meanwhile, the method is suitable for the remanufacturing of the automobile which leaves the factory;

2) because the remote key circuit is integrated, the remote key does not need to be sensed after fingerprint verification, and the car owner can unlock the car without carrying the remote key;

3) the second master control MCU unit is connected with the first master control MCU unit through a serial interface and is used for reading fingerprint unlocking information from the first master control MCU by the second master control MCU unit so as to output a signal of a remote control key switch and simulate the unlocking or locking operation of the remote control key;

4) the CAN bus port and the LIN bus port are both commonly matched ports in the automobile, and the utility model CAN realize the bus connection of any port;

5) an emergency signal control analog switch chip is arranged in a remote control key circuit and used for disconnecting an induction antenna of the key to prevent the key from being started in an emergency under the condition of power failure;

6) the utility model discloses there is the GPRS communication function in addition, realizes long-range wireless communication and control.

Drawings

Fig. 1 is a block diagram of the overall circuit structure of the present invention;

fig. 2 is a circuit diagram of a first master MCU of the present invention;

FIG. 3 is a fingerprint enabled circuit diagram of the present invention;

FIG. 4 is a circuit diagram of the interface of the fingerprint module of the present invention;

fig. 5 is a circuit diagram of the CAN bus transceiver of the present invention;

fig. 6 is a circuit diagram of a LIN bus transceiver of the present invention;

fig. 7 is a circuit diagram of a GPRS module of the present invention;

fig. 8 is a circuit diagram of the SIM card of the present invention.

Fig. 9 is a circuit diagram of the bluetooth module of the present invention;

fig. 10 is a circuit diagram of a second MCU of the present invention;

FIG. 11 is a key power enable circuit diagram of the present invention;

fig. 12 is a circuit diagram of the remote control key chip and the RF transmitting chip of the present invention;

fig. 13 is a circuit diagram of an emergency signal control analog switch chip of the present invention;

fig. 14 is a circuit diagram of the triaxial antenna of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1, an automobile fingerprint unlocking device integrated with an automobile key comprises a fingerprint module and a first main control MCU unit; the automobile remote control key circuit and the CAN bus transceiver are also included; fingerprint module, car remote control key circuit and CAN bus transceiver all are connected with first master control MCU unit, and CAN bus transceiver is connected with car CAN bus port communication.

Furthermore, the first main control MCU unit is also connected with an LIN bus transceiver, and the LIN bus transceiver is in communication connection with an LIN bus port of the automobile.

Furthermore, the first main control MCU unit is also connected with one or two of a GPRS communication module and a Bluetooth module.

The fingerprint module is mounted on a handle of an automobile door (see patent document with publication number CN 207389147U). First master control MCU unit, car remote control key circuit and CAN bus transceiver, GPRS communication module, LIN bus transceiver all install on integrated circuit board (PCB), the PCB CAN be placed in the car door, also CAN place in other positions in the car.

The following are specific embodiments of the present invention:

as shown in fig. 2, which is a circuit diagram of an embodiment of the first master MCU, the first master MCU is selected as STM32F105RBT6, which is connected to an interface of the fingerprint module through pins 51(U4RX), 52(U4TX), 56(ZW _ TOUCH), 57(ZW _ EN) (corresponding to fig. 4), wherein the middle of the pin 57(ZW _ EN) is connected to a ZW _ V interface of the fingerprint module through the fingerprint enabling circuit of fig. 3, and the fingerprint enabling circuit is an MOS switch circuit, so as to implement a power supply enabling function of the fingerprint module.

In fig. 2, the first master MCU is further connected to the CAN bus transceiver of fig. 5 through pins 44(CANTXD) and 45(CANRXD), the first master MCU is further connected to the LIN bus transceiver of fig. 6 through pins 53(U5TX) and 54(U5RX), and in fig. 5, pins 6(CANH) and 7(CANL) of the CAN bus transceiver are connected to the car CAN bus interface. In fig. 6, pins No. 6(CANH) and 7(CANL) of the LIN bus transceiver are connected to the automotive LIN bus interface.

In fig. 2, the first master MCU may be connected to the GPRS module of fig. 7 through pins 42(U1TX) and 43(U1RX), the GPRS module of fig. 7 is an SOC chip MC20 of GPRS, and pins 19 to 21 of the GPRS module are connected to the SIM card of fig. 8, which corresponds to fig. 8. The first master MCU can also be connected with pins 8(TXD) and 10(U3RXD) of the Bluetooth module of FIG. 9 through pins 29(U3TX) and 30(U3RX), and the Bluetooth module of FIG. 9 is a Bluetooth chip NRF52832-QFAA which can be developed secondarily.

Fig. 10-14 are circuit diagrams of a vehicle remote control key, including a second main control MCU unit, a key power enable circuit, a vehicle remote control key chip, an RF transmit chip, an emergency signal control analog switch chip, and a three-axis antenna.

As shown in fig. 10, the second MCU is selected as STM8S003F3P6, a key power enable pin 19(KEYEN) of the second MCU is connected to an input terminal of the key power enable circuit of fig. 11, and a MOS transistor switch circuit of fig. 11 outputs KEYV as a key power enable signal to be connected to a pin 1 of the key fob PCF7953PTTAC1800 of fig. 12.

In fig. 10, the second master MCU is connected to the U2TX and U2RX pins of the first master MCU via serial ports via pins 2(TXD) and 3(RXD), and reads fingerprint unlocking information from the first master MCU, so as to output a signal for outputting a key switch for simulating an unlocking or locking operation of the key, and pins 16(OUT1) and 15(OUT2) of the second master MCU are signals for simulating an unlocking or locking operation of the key, and are output to

pins

28 and 27 of the key chip 7953PTTAC1800 in fig. 12, which corresponds to fig. 12.

In fig. 12, the key fob chip is PCF7953PTTAC1800, the RF transmitter chip is TDK5100F, and the RF transmitter chip is connected to the key fob chip through a 7 th (FSKDTA) pin, in the figure, the X1, X2, Y1, Y2, and Y3 pins of the key fob chip are input pins of the three-axis antenna of fig. 14, wherein the X2 pin (which may be any one pin of the three-axis antenna) is not directly connected to the three-axis antenna, and is connected to the three-axis antenna of fig. 14 through the emergency signal control analog switch chip of fig. 12.

IN fig. 13, TS5a3166DCKR is an emergency signal control analog switch chip, an IN pin of an input end of the emergency signal control analog switch chip is connected to an EMERG signal output end of the 17 th pin of the second master MCU, an X-axis output signal X2 of A3-axis output signal of the key circuit remote control key chip is first connected to an NC end of an input pin of the emergency signal control analog switch chip, and then an COM end (X2K signal) of an output pin of the emergency signal control analog switch chip is connected to an X2 input end of the three-axis antenna IN fig. 14.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims

1. An automobile fingerprint unlocking device integrated with an automobile key comprises a fingerprint module and a first main control MCU unit;

the remote control system is characterized by also comprising an automobile remote control key circuit and a CAN bus transceiver;

the fingerprint module, the automobile remote control key circuit and the CAN bus transceiver are all connected with the first master control MCU unit, and the CAN bus transceiver is in communication connection with an automobile CAN bus port;

2. The automobile fingerprint unlocking device integrated with an automobile key according to claim 1, wherein an emergency signal control analog switch chip is further connected between the automobile remote control key chip and the three-axis antenna, a control end of the emergency signal control analog switch chip is connected with the second main control MCU unit, a signal input end is connected with an output end of any one axis of the automobile remote control key chip, and a signal output end of the emergency signal control analog switch chip is connected with a signal input end of the three-axis antenna.

3. The automobile fingerprint unlocking device integrated with an automobile key according to claim 1, wherein the second main control MCU unit is connected with the first main control MCU unit through a serial interface.

4. The automobile fingerprint unlocking device integrated with the automobile key as claimed in claim 1, wherein the first master control MCU unit is further connected with an LIN bus transceiver, and the LIN bus transceiver is in communication connection with an LIN bus port of the automobile.

5. The automobile fingerprint unlocking device integrated with the automobile key according to claim 1, wherein the first main control MCU unit is further connected with one or more of a GPRS communication module and a Bluetooth module.