CN206406889U - Car keyless entry and keyless start circuit based on Bluetooth communication - Google Patents

Abstract

The utility model discloses a car keyless entry and keyless starting circuit based on bluetooth communication, including theftproof ECU, be used for receiving the theftproof basic station of former car key unblock information, main control unit, engine theftproof authentication analog module, unblock signal switching circuit, engine start control module, lock control module and combination switch signal module; the master controller controls the anti-theft ECU to send out an unlocking authentication request signal by outputting a trigger signal through the trigger signal transmission line, controls the unlocking signal switching circuit to select one path of unlocking signal to feed back to the anti-theft ECU, and performs switching through the unlocking signal switching circuit after the master controller acquires Bluetooth unlocking information through the Bluetooth module; the effect is as follows: on the premise of not influencing the original vehicle anti-theft system, the keyless entry and the keyless starting of the vehicle are realized, and a user can flexibly select different starting modes according to the actual condition of the user, so that the function upgrading of the original vehicle is facilitated.

Description

Car keyless entry and keyless start circuit based on Bluetooth communication

technical field

The utility model relates to the field of vehicle engine circuit control, in particular to a car keyless entry and keyless start circuit based on bluetooth communication.

Background technique

With the development of the economy, more and more cars have entered ordinary households. Today, with the increasing popularity of cars, people gradually put forward more convenient and comfortable requirements for the functions of cars. Vehicle keyless entry and keyless start have been sought after by young car owners in recent years due to their convenient operation and comfortable experience. Car keyless start, that is, to start the car without taking out the key, put the key in the bag or pocket, press the button in the car or turn the guide plate to ignite the engine, when the owner enters the car, the detection system in the car It will immediately recognize the smart card in your key, and the computer in the car will enter the working state after confirmation. At this time, you only need to press the start button (or knob) in the car to start the car normally. Vehicles with this function are mostly high-end cars, while ordinary vehicles do not have such a convenient function. Ordinary vehicles need to pass the car key to complete the anti-theft verification of the car, so as to control the ignition to start the car.

In the prior art, if this function is to be installed on an ordinary vehicle, the technical solution adopted is to remove the engine anti-theft of the original car by re-equipping an original car key and embedding it in the car, so as to realize the security of the vehicle. However, if this scheme is adopted, first, the refitting operation is relatively complicated, and may damage the structure of the vehicle itself and the anti-theft system; second, the practicability and convenience of the additional system need to be improved.

Contents of the invention

In order to solve the above problems, the utility model provides a car keyless entry and keyless start circuit based on Bluetooth communication, which can realize the keyless entry and keyless start of the car without affecting the original car anti-theft system.

The technical scheme adopted by the utility model is: a car keyless entry and keyless start circuit based on bluetooth communication, including an anti-theft ECU, and an anti-theft base station for receiving the unlocking information of the original car key, a main controller, and an engine anti-theft authentication simulation module, unlock signal switching circuit, engine start control module, door lock control module and combination switch signal module;

The main controller is connected with a Bluetooth module for obtaining Bluetooth unlocking information and a CAN bus module for obtaining vehicle status information;

The engine anti-theft authentication simulation module is used to simulate the unlocking information of the original car key, and the signals output by the engine anti-theft authentication simulation module and the anti-theft base station are respectively sent to one input terminal of the unlock signal switching circuit, and the main controller On the one hand, control the anti-theft ECU to send an unlock authentication request signal through the trigger signal transmission line output trigger signal; on the other hand, control the unlock signal switching circuit to select one of the unlock signals to feed back to the anti-theft ECU After the module acquires the Bluetooth unlock information, it switches through the unlock signal switching circuit, and the engine anti-theft authentication simulation module transmits the anti-theft authentication signal to the anti-theft ECU;

The engine start control module is used to output an engine start signal;

The door lock control module is used to directly output the door lock control signal sent by the main controller;

The combined switch signal module is used to input a one-key start signal.

Further, the unlock signal switching circuit includes a relay, the normally closed contact of the relay is connected to the feedback signal line of the anti-theft base station, the normally open contact of the relay is connected to the feedback signal line of the engine anti-theft authentication analog module, the The movable contact of the relay is connected to the authentication signal feedback terminal of the anti-theft ECU, and the power-on state of the coil of the relay is controlled by the main controller.

Further, the main controller is connected with a driving circuit for controlling the energization state of the relay coil, the driving circuit includes a triode Q12 and a triode Q9, the base of the triode Q12 is connected to the driving control terminal of the main controller through a resistor R51, The emitter of the triode Q12 is grounded, the collector of the triode Q12 is connected to a 5V power supply through the pull-up resistor R40, and the collector of the triode Q12 is connected to the base of the triode Q9 through the resistor R44, the emitter of the triode Q9 is grounded, and the triode Q9 The collector of the diode D4 is connected to the anode of the diode D4, the cathode of the diode D4 is connected to the 5V power supply, the relay coil is connected in parallel with the diode D4, and a resistor R49 is also connected between the base and the emitter of the triode Q9.

The engine start control module is connected with a drive circuit for outputting an engine start signal. The drive circuit includes a triode Q14, a triode Q11 and a triode Q8. The base of the triode Q14 is connected to the drive control terminal of the main controller through a resistor R54. At the same time, the base of the triode Q14 is also connected to the 5V power supply through the pull-up resistor R50, the emitter of the triode Q14 is grounded, the collector of the triode Q14 is connected to the 12V power supply through the pull-up resistor R42, and the collector of the triode Q14 passes through the resistor R47. connected to the base of the triode Q11, the emitter of the triode Q11 is grounded, the collector of the triode Q11 is connected to the 12V power supply through the pull-up resistor R39, and the collector of the triode Q11 is connected to the base of the triode Q8 through the resistor R43, and the transistor Q8 The emitter of the transistor Q8 is connected to the 12V power supply, the collector of the transistor Q8 is connected to the cathode of the diode D6, the anode of the diode D6 is grounded, and the collector of the transistor Q8 outputs the engine start signal.

The main controller selection chip model is MC9S08DZ.

The selected chip model of the engine anti-theft authentication simulation module is S9KEAZN64AMLC.

The selected model of the bluetooth communication module is TSL77, the bluetooth communication module is connected with the main controller through a serial bus, and the bluetooth communication module is used to realize the pairing with the mobile terminal equipment.

The remarkable effect of the present utility model is:

The main controller controls the work of the relay in the unlocking signal switching circuit, and controls the unlocking signal switching circuit to select one of the unlocking signals to feed back to the anti-theft ECU. After the main controller obtains the Bluetooth unlocking information through the Bluetooth module, it switches through the unlocking signal The circuit is switched, and the engine anti-theft authentication simulation module transmits an anti-theft authentication signal to the anti-theft ECU, thereby completing the switch between the key starting mode and the keyless starting mode of the car. Through the above design, the keyless entry and keyless start of the car can be realized without affecting the original car anti-theft system; and the user can flexibly choose different starting methods according to his actual situation, which brings convenience to the user.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the circuit principle diagram of unlocking signal switching circuit in Fig. 1;

Fig. 3 is a schematic circuit diagram of the engine start control module in Fig. 1;

Fig. 4 is the circuit schematic diagram of main controller in Fig. 1;

Fig. 5 is the circuit schematic diagram of the engine anti-theft authentication simulation module in Fig. 1;

FIG. 6 is a schematic circuit diagram of the Bluetooth module in FIG. 1 .

detailed description

In order to make the technical problems, technical solutions and advantages solved by the utility model more clear, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments, and the description here does not mean that all subjects corresponding to the specific examples stated in the embodiments are all cited in the claims.

As shown in Figure 1, a car keyless entry and keyless start circuit based on Bluetooth communication includes an anti-theft ECU, an anti-theft base station for receiving the original car key unlock information, a main controller, and an engine anti-theft authentication simulation module , Unlock signal switching circuit, engine start control module, door lock control module and combined switch signal module;

The main controller is connected with a Bluetooth module for obtaining Bluetooth unlocking information and a CAN bus module for obtaining vehicle status information;

The engine anti-theft authentication simulation module is used to simulate the unlocking information of the original car key, and the signals output by the engine anti-theft authentication simulation module and the anti-theft base station are respectively sent to one input terminal of the unlock signal switching circuit, and the main controller On the one hand, control the anti-theft ECU to send an unlock authentication request signal through the trigger signal transmission line output trigger signal; on the other hand, control the unlock signal switching circuit to select one of the unlock signals to feed back to the anti-theft ECU After the module acquires the Bluetooth unlock information, it switches through the unlock signal switching circuit, and the engine anti-theft authentication simulation module transmits the anti-theft authentication signal to the anti-theft ECU;

The engine start control module is used to output an engine start signal;

The door lock control module is used to directly output the door lock control signal sent by the main controller;

The combined switch signal module is used to input a one-key start signal.

As shown in Figure 2, the unlocking signal switching circuit includes a relay, the normally closed contact of the relay is connected to the feedback signal line of the anti-theft base station, and the normally open contact of the relay is connected to the feedback signal of the engine anti-theft authentication analog module Line, the movable contact of the relay is connected to the authentication signal feedback terminal of the anti-theft ECU, and the energization state of the coil of the relay is controlled by the main controller; the main controller is connected with a driver for controlling the energization state of the relay coil circuit, the drive circuit includes a transistor Q12 and a transistor Q9, the base of the transistor Q12 is connected to the drive control terminal of the main controller through a resistor R51, the emitter of the transistor Q12 is grounded, and the collector of the transistor Q12 passes through a pull-up resistor R40 Connect to the 5V power supply, and at the same time, the collector of the transistor Q12 is connected to the base of the transistor Q9 through the resistor R44, the emitter of the transistor Q9 is grounded, the collector of the transistor Q9 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the 5V power supply, the relay The coil is connected in parallel with the diode D4, and a resistor R49 is also connected between the base and the emitter of the triode Q9.

As shown in Figure 3, after the said engine start control module receives the start signal ST1 of the master control, it outputs the engine start signal after passing through a signal drive circuit, and the drive circuit includes a triode Q14, a triode Q11 and a triode Q8, and the triode Q14 The base of the triode Q14 is connected to the drive control terminal of the main controller through the resistor R54, and the base of the triode Q14 is also connected to the 5V power supply through the pull-up resistor R50. The emitter of the triode Q14 is grounded, and the collector of the triode Q14 is pulled up. The resistor R42 is connected to the 12V power supply, and the collector of the transistor Q14 is connected to the base of the transistor Q11 through the resistor R47. The electrode is connected to the base of the transistor Q8 through the resistor R43, the emitter of the transistor Q8 is connected to the 12V power supply, the collector of the transistor Q8 is connected to the cathode of the diode D6, the anode of the diode D6 is grounded, and the collector of the transistor Q8 outputs the engine start signal ST1 _- OUT.

As shown in Figure 4, in order to satisfy communication connection and signal processing with various devices, the main controller uses a chip model of MC9S08DZ, which includes a serial port communication interface and a CAN bus interface, which is convenient for implementation. Connect with modules such as the Bluetooth module and the CAN communication module.

As shown in Figure 5, the engine anti-theft authentication simulation module selects a chip model of S9KEAZN64AMLC, and the chip is provided with a serial communication interface, which is convenient for data transmission with the module and the anti-theft ECU, thereby completing the anti-theft verification during keyless start .

As shown in Figure 6, in order to allow the main controller to obtain Bluetooth unlocking information, the model selected by the Bluetooth communication module is TSL77, and the Bluetooth communication module is also connected with a light-emitting diode for displaying whether the module is powered on.

The working principle of the utility model is: carry out bluetooth communication with the mobile phone through the bluetooth module, and verify the legality of the mobile phone. The strength signal is converted into a distance value from the vehicle. When the distance is greater than the set 4.5 meters, the CAN communication module sends a command to close the door lock, and the main controller outputs a close door lock signal to the door lock control module; when the distance is less than the set When the distance is 2.5 meters, the CAN communication module sends a command to open the door lock, and the main controller outputs a signal to open the door lock to the door lock control module; The main controller sends an unlock authentication request signal and controls the unlocking signal switching circuit to select one of the unlocking signals to feed back to the anti-theft ECU. After the main controller obtains the Bluetooth unlocking information through the Bluetooth module, it switches through the unlocking signal switching circuit. The engine anti-theft authentication simulation module transmits an anti-theft authentication signal to the anti-theft ECU. After the anti-theft verification is completed, the main controller outputs an engine start signal to the engine start control module, thereby realizing keyless entry and keyless start of the car.

Finally, it should be noted that the above description is a preferred embodiment of the utility model, and under the inspiration of the utility model, those skilled in the art can make various Similar representations, such transformations all fall within the protection scope of the present utility model.

Claims (7)

1. a kind of automobile no-key based on Bluetooth communication enters and without key start-up circuit, including antitheft ECU and for connecing Receive the anti-theft base station of former car key unlocking information, it is characterised in that also including master controller, engine anti-theft certification simulation mould Block, unlocking signal switching circuit, engine start control module, door lock control module and stacked switch signaling module；

The bluetooth module for obtaining bluetooth unlocking information is connected with the master controller and for obtaining vehicle-state letter The CAN module of breath；

The engine anti-theft certification analog module is used to simulate former car key unlocking information, engine anti-theft certification simulation mould The signal that block is exported with the anti-theft base station is respectively fed in the input all the way of the unlocking signal switching circuit, the master control On the one hand device processed exports trigger signal by trigger signal transmission line believes to control the antitheft ECU to send unblock certification request Number, on the other hand controlling the unlocking signal switching circuit selection, wherein unlocking signal is fed back in the antitheft ECU all the way, when Master controller is obtained after bluetooth unlocking information by bluetooth module, is switched over by unlocking signal switching circuit, by the hair The antitheft certification analog module of motivation transmits antitheft authentication signal to the antitheft ECU；

The engine start control module is used for output engine enabling signal；

The door lock control module is used to directly export the door lock control signal that master controller is sent；

The stacked switch signaling module is used to input one-key start signal.

2. the automobile no-key according to claim 1 based on Bluetooth communication enters and without key start-up circuit, its feature It is, the unlocking signal switching circuit includes relay, the normally-closed contact of the relay connects the feedback of the anti-theft base station Signal wire, the normally opened contact of the relay connects the feedback signal line of the engine anti-theft certification analog module, the relay Armature contact connect the authentication signal feedback end of the antitheft ECU, the coil electricity state of the relay is by the master controller It is controlled.

3. the automobile no-key according to claim 2 based on Bluetooth communication enters and without key start-up circuit, its feature It is, the drive circuit for control relay coil electricity state is connected with the master controller, and the drive circuit includes Triode Q12 and triode Q9, the triode Q12 base stage connect the drive control end of master controller by resistance R51, described Triode Q12 grounded emitter, triode Q12 colelctor electrode connects 5V power supplys by pull-up resistor R40, while triode Q12 Colelctor electrode connect triode Q9 base stage, the grounded emitter of the triode Q9, triode Q9 colelctor electrode by resistance R44 It is connected with diode D4 anode, diode D4 negative electrode connects 5V power supplys, and relay coil is in parallel with diode D4, in triode Resistance R49 is also associated between Q9 base stage and emitter stage.

4. the automobile no-key according to claim 1 based on Bluetooth communication enters and without key start-up circuit, its feature It is, the drive circuit for output engine enabling signal, driving electricity is connected with the engine start control module Road includes triode Q14, triode Q11 and triode Q8, the triode Q14 base stage connect master controller by resistance R54 Drive control end, while triode Q14 base stage also connects 5V power supplys, the transmitting of the triode Q14 by pull-up resistor R50 Pole is grounded, and the colelctor electrode of the triode Q14 connects 12V power supplys by pull-up resistor R42, while triode Q14 colelctor electrode warp Cross the base stage that resistance R47 meets triode Q11, the grounded emitter of the triode Q11, triode Q11 colelctor electrode passes through upper Pull-up resistor R39 connects 12V power supplys, while triode Q11 colelctor electrode connects triode Q8 base stage, three pole by resistance R43 Pipe Q8 emitter stage connects 12V power supplys, and triode Q8 colelctor electrode is connected with diode D6 negative electrode, and diode D6 anode connects Ground, while triode Q8 colelctor electrode output engine enabling signal.

5. the automobile no-key according to claim 1 based on Bluetooth communication enters and without key start-up circuit, its feature It is, the master controller selection chip model is MC9S08DZ.

6. the automobile no-key according to claim 1 based on Bluetooth communication enters and without key start-up circuit, its feature It is, the engine anti-theft certification analog module selection chip model is S9KEAZN64AMLC.

7. the automobile no-key according to claim 1 based on Bluetooth communication enters and without key start-up circuit, its feature It is, the bluetooth module selection chip model is TSL77.