CN116238457A - Keyless starting system and method for sharing in-vehicle low-frequency antenna and IMMO antenna - Google Patents
Keyless starting system and method for sharing in-vehicle low-frequency antenna and IMMO antenna Download PDFInfo
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- CN116238457A CN116238457A CN202310253738.8A CN202310253738A CN116238457A CN 116238457 A CN116238457 A CN 116238457A CN 202310253738 A CN202310253738 A CN 202310253738A CN 116238457 A CN116238457 A CN 116238457A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/02—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism
- B60R25/021—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/40—Features of the power supply for the anti-theft system, e.g. anti-theft batteries, back-up power supply or means to save battery power
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a keyless starting system and a method for sharing a low-frequency antenna and an IMMO antenna in a vehicle, wherein the system comprises the following steps: MCU, IMMO driving module, low frequency driving module, multiplexing low frequency antenna module in car, high frequency receiving and transmitting module; the in-vehicle multiplexing low-frequency antenna module includes: multiplexing a low-frequency antenna, a resistor R1, a resistor R2, a resistor R3 and a capacitor C1; the resistor R1, the multiplexing low-frequency antenna and the resistor R2 are sequentially connected in series, and the resistor R1 and the resistor R2 are connected to the IMMO driving module to form an IMMO antenna loop; the resistor R3, the multiplexing low-frequency antenna and the capacitor C1 are sequentially connected in series, and the resistor R3 and the capacitor C1 are connected to the low-frequency driving module to form a low-frequency antenna loop. The conventional engine starting function and the standby vehicle starting function when the electric quantity of the vehicle key is insufficient are realized by the same optimized low-frequency antenna.
Description
Technical Field
The invention relates to the field of keyless starting systems, in particular to a keyless starting system and method for sharing a low-frequency antenna and an IMMO antenna in a vehicle.
Background
The Passive Entry & Passive Start System is applied to unlocking and starting the vehicle without a key, and when a driver steps in a designated range with a vehicle key, the Passive start system triggers and identifies the authorized vehicle key according to a plurality of switch signals and then unlocks and starts the vehicle; when the car key leaves the car, the door lock can be automatically locked and enter an anti-theft state. The working principle of the system is as follows: the driver carries a car key (the car key must have electricity) near or in the car, and when the start button or the door pulling handle is pressed, the car receives a signal of ignition or unlocking and sends the signal to the low-frequency antenna. The low-frequency antenna receives the signal and then sends out a low-frequency trigger signal. The car key receives the low-frequency trigger signal and sends out a high-frequency unlocking signal. The high-frequency receiver receives the high-frequency unlocking signal, and the whole vehicle is unlocked or ignited.
When the battery on the car key is exhausted, the car key cannot send a low-frequency signal to actively unlock, and the IMMO antenna for standby car starting is required to be used as a standby emergency mode for unlocking. At the moment, the IMMO driving module drives the IMMO antenna, the vehicle key is close to the IMMO antenna, low-frequency authentication can be achieved through mutual inductance charging, and emergency starting of the vehicle can be achieved after authentication is passed.
The conventional keyless starting system is characterized in that a common low-frequency antenna for searching a key and an IMMO antenna for starting a vehicle in standby are separated and are respectively and independently configured and driven, two sets of antennas are required to be configured and respectively realized, an inductor and a capacitor are connected in series inside the common low-frequency antenna, the IMMO antenna for starting the vehicle in standby has no capacitor only, and the configuration inevitably causes the defects of high part cost, high wire harness cost, multiple occupied space for vehicle body arrangement and the like, and the vehicle starting efficiency is lower.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a keyless start system and method for sharing an in-vehicle low frequency antenna and an IMMO antenna, which can solve the above-mentioned problems.
The invention provides a keyless starting system shared by an in-vehicle low-frequency antenna and an IMMO antenna, which comprises an MCU, an IMMO driving module, a low-frequency driving module, an in-vehicle multiplexing low-frequency antenna module and a high-frequency receiving and transmitting module;
the in-vehicle multiplexing low-frequency antenna module includes: multiplexing a low-frequency antenna, a resistor R1, a resistor R2, a resistor R3 and a capacitor C1; the resistor R1, the multiplexing low-frequency antenna and the resistor R2 are sequentially connected in series, and the resistor R1 and the resistor R2 are connected to the IMMO driving module to form an IMMO antenna loop; the resistor R3, the multiplexing low-frequency antenna and the capacitor C1 are sequentially connected in series, and the resistor R3 and the capacitor C1 are connected to the low-frequency driving module to form a low-frequency antenna loop;
the MCU is connected with the IMMO driving module and the low-frequency driving module, and is used for simultaneously starting the IMMO driving module and the low-frequency driving module, when the MCU starts the low-frequency driving module, the MCU drives the low-frequency antenna loop to send out a long-distance low-frequency car searching key signal, and when the MCU starts the IMMO driving module, the MCU drives the IMMO antenna loop to be electrified;
the low-frequency driving module is used for sending out a low-frequency signal of the car searching key, the high-frequency receiving and transmitting module is used for receiving a high-frequency unlocking signal returned by the intelligent car key, and the IMMO driving module is used for receiving a mutual inductance unlocking signal returned by the intelligent car key;
the MCU is connected with the high-frequency receiving and transmitting module and the IMMO driving module, and can unlock the steering wheel and start the engine according to the high-frequency unlocking signal received by the high-frequency receiving and transmitting module, or can unlock the steering wheel and start the engine according to the mutual inductance unlocking signal received by the IMMO driving module.
Further, the multiplexed low frequency antenna includes an inductance L1.
Further, the method comprises the steps of: a switch detection module;
the switch detection module is connected to the MCU, and is used for detecting various switch signals and forwarding the detected switch signals to the MCU.
Further, the switch detection module is connected with a brake pedal switch, a starting button, a left front door request switch and a right front door request switch and is used for detecting switch request signals.
Further, the vehicle-mounted low-frequency antenna device comprises a first vehicle-mounted low-frequency antenna circuit, a second vehicle-mounted low-frequency antenna circuit and a third vehicle-mounted low-frequency antenna circuit;
the first in-car low-frequency antenna circuit, the second in-car low-frequency antenna circuit and the third in-car low-frequency antenna circuit are all connected to the low-frequency driving module and used for sending low-frequency signals to find a car key.
Further, the method comprises the steps of: a power distribution module, a CAN transceiver;
the power distribution module is connected to the MCU and used for starting the power-on of the engine control module and the electronic steering column lock module according to the control signal of the MCU.
The MCU is connected to the CAN transceiver for transmitting and receiving signals to the engine control module and the electronic steering column lock module through the CAN transceiver.
Furthermore, the MCU, the IMMO driving module and the low-frequency driving module adopt SPI communication.
The invention provides a keyless starting method for sharing a low-frequency antenna and an IMMO antenna in a vehicle, which comprises the following steps:
the switch detection module detects the switch request signal and forwards the switch request signal to the MCU;
the MCU generates a corresponding control signal according to the switch request signal and sends the control signal to the low-frequency driving module;
the low-frequency driving module drives the low-frequency antenna circuit to send out the low-frequency car searching key signal according to a control signal;
if the car key is powered on, the low-frequency car searching key signal is received and then the high-frequency unlocking signal is sent out;
the high-frequency receiving and transmitting module generates an unlocking signal after receiving the high-frequency unlocking signal and transmits the unlocking signal to the MCU;
and the MCU controls the electronic steering column lock module and the engine control module to send an unlocking CAN signal and a starting CAN signal after being electrified.
Further, after detecting the switch request signal, the switch detection module forwards the switch request signal to the MCU, and the MCU further includes:
the MCU generates a corresponding control signal according to the switch request signal and sends the control signal to the IMMO driving module;
the IMMO driving module drives the IMMO antenna circuit to be electrified according to a control signal;
if the electric quantity of the vehicle key is insufficient, the vehicle key is close to the IMMO antenna circuit to generate the unlocking mutual inductance signal;
the IMMO antenna driving module forwards the received mutual inductance signal to the MCU;
and the MCU controls the electronic steering column lock module and the engine control module to send an unlocking CAN signal and a starting CAN signal after being electrified.
Further, the MCU controls the electronic steering column lock module and the engine control module to be powered on and then comprises:
the MCU sends the unlocking CAN signal and the starting CAN signal to the electronic steering column lock module and the engine control module through the CAN transceiver;
the electronic steering column lock module controls the steering wheel to be unlocked;
the engine control module controls engine start.
The invention has the beneficial effects that:
firstly, the capacitance of a common low-frequency antenna circuit in the vehicle is cancelled, only an inductance coil is reserved, and the inductance value is kept the same as that in an IMMO antenna circuit, namely, the common low-frequency antenna and the IMMO antenna are multiplexed into one antenna, so that the circuit design and the operability of a driver are simplified, the cost is saved, and the arrangement space of the vehicle body is reduced under the condition that the function is kept unchanged. The conventional engine starting function and the standby vehicle starting function when the electric quantity of the vehicle key is insufficient are realized by relying on the same optimized low-frequency antenna
Secondly, the low-frequency driving module and the IMMO driving module adopt an integrated low-frequency antenna special driving chip scheme ATA5291 with a self-diagnosis function, and the MCU CAN diagnose faults such as low-frequency antenna open circuit/ground short circuit/power supply short circuit and the like through SPI communication, and upload CAN buses and transmit the faults to a whole vehicle diagnostic instrument; the IMMO module is integrated in the chip ATA5291, so that the optimized low-frequency antenna can be driven and reused, and the standby vehicle starting function when the electric quantity of the vehicle key is insufficient is realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall system module of the present invention.
Fig. 2 is a schematic diagram of an in-vehicle low frequency multiplexing antenna module according to the present invention.
Fig. 3 is a schematic diagram of a first switch detection module according to the present invention.
Fig. 4 is a schematic diagram of a second switch detection module according to the present invention.
Fig. 5 is a diagram of a first in-vehicle low frequency antenna circuit, a second in-vehicle low frequency antenna circuit, a third in-vehicle low frequency antenna circuit, a first out-of-vehicle antenna circuit, a second out-of-vehicle antenna circuit of the present invention;
fig. 6 is a schematic diagram of a power distribution module of the present invention.
Fig. 7 is a schematic diagram of a CAN transceiver connection of the present invention.
Fig. 8 is a schematic diagram of a driving module of the indicator lamp of the present invention.
Fig. 9 is a flow chart of the method of the present invention.
Detailed Description
For the convenience of understanding of those skilled in the art, the structure of the present invention will be described in further detail with reference to the accompanying drawings, and it should be understood that, unless the order of the steps mentioned in the present embodiment is specifically described, the order of the steps may be adjusted according to actual needs, and may even be performed simultaneously or partially simultaneously.
As shown in fig. 1, an embodiment of the present invention provides a keyless start system shared by a low-frequency antenna and an IMMO antenna, including: MCU, IMMO driving module, low frequency driving module, multiplexing low frequency antenna module in car, high frequency receiving and transmitting module;
as shown in fig. 2, the in-vehicle multiplexing low frequency antenna module includes: multiplexing a low-frequency antenna, a resistor R1, a resistor R2, a resistor R3 and a capacitor C1; the resistor R1, the multiplexing low-frequency antenna and the resistor R2 are sequentially connected in series, and the resistor R1 and the resistor R2 are connected to the IMMO driving module to form an IMMO antenna loop; the resistor R3, the multiplexing low-frequency antenna and the capacitor C1 are sequentially connected in series, and the resistor R3 and the capacitor C1 are connected to the low-frequency driving module to form a low-frequency antenna loop;
further, the multiplexed low frequency antenna includes an inductance L1.
In this embodiment, the design optimization of the in-vehicle multiplexing low-frequency antenna module and the design optimization of the low-frequency driving module and the IMMO driving module are aimed at. The internal capacitance of the low-frequency antenna in the vehicle is canceled, only the inductance coil is reserved, and the inductance value is kept the same as 345uH of the IMMO antenna circuit, and the inductance value of the antenna used by different antennas is different. The low-frequency antenna circuit and the IMMO antenna circuit can share the inductance L1, and then the low-frequency driving module and the IMMO driving module are used for driving and controlling the multiplexing low-frequency antenna module in the vehicle.
The MCU is connected with the IMMO driving module and the low-frequency driving module, and is used for simultaneously starting the IMMO driving module and the low-frequency driving module, when the MCU starts the low-frequency driving module, the MCU drives the low-frequency antenna loop to send out a long-distance low-frequency car searching key signal, and when the MCU starts the IMMO driving module, the MCU drives the IMMO antenna loop to be electrified;
the low-frequency driving module is used for sending out a low-frequency signal of the car searching key, the high-frequency receiving and transmitting module is used for receiving a high-frequency unlocking signal returned by the intelligent car key, and the IMMO driving module is used for receiving a mutual inductance unlocking signal returned by the intelligent car key;
the MCU is connected with the high-frequency receiving and transmitting module and the IMMO driving module, and can unlock the steering wheel and start the engine according to the high-frequency unlocking signal received by the high-frequency receiving and transmitting module, or can unlock the steering wheel and start the engine according to the mutual inductance unlocking signal received by the IMMO driving module.
In addition, the MCU can also start the electronic gear shifter according to the high-frequency unlocking signal received by the high-frequency receiving and transmitting module, or can start the electronic gear shifter according to the mutual inductance unlocking signal received by the IMMO driving module, and unlock gear control through the electronic gear shifter.
In this embodiment, the in-vehicle multiplexing low-frequency antenna module is configured to, when a driver carries a vehicle key into a vehicle, unlock and start an engine or start an electronic shifter when the driver wants to start the vehicle, drive the in-vehicle multiplexing antenna by using the driving module to search for a vehicle key signal. If the vehicle key is electrified, after the vehicle normally enters the vehicle, the steering wheel can be unlocked, the engine can be started and the electronic gear shifter can be started after the starting button is pressed; if the electric quantity of the vehicle key is insufficient, a driver presses and starts the vehicle key and simultaneously brings the vehicle key close to the IMMO antenna circuit to generate mutual inductance so as to unlock the vehicle, and the IMMO antenna circuit is generally arranged at the position of a starting button in the vehicle.
Further, the method comprises the steps of: a switch detection module;
the switch detection module is connected to the MCU, and is used for detecting various switch signals and forwarding the detected switch signals to the MCU.
Further, the switch detection module is connected with a brake pedal switch, a starting button, a left front door request switch and a right front door request switch and is used for detecting switch request signals.
In this embodiment, when the vehicle is about to start, the MCU can control the low-frequency driving module and the IMMO driving module to drive the low-frequency antenna circuit and the IMMO antenna circuit to search for the vehicle key only by pressing the brake and pressing the start button. As shown in fig. 3 and 4, the switch detection module includes: the system comprises a first switch detection signal module and a second switch detection module, wherein the first switch detection module is used for detecting request signals of a left front door request switch, a right front door request switch and the like, and the second switch detection module is used for detecting request signals of a starting key.
Further, as shown in fig. 5, the antenna device comprises a first in-vehicle low-frequency antenna circuit, a second in-vehicle low-frequency antenna circuit and a third in-vehicle low-frequency antenna circuit;
the first in-car low-frequency antenna circuit, the second in-car low-frequency antenna circuit and the third in-car low-frequency antenna circuit are all connected to the low-frequency driving module and used for sending low-frequency signals to find a car key.
In the embodiment, due to the blocking of the in-vehicle components, the first in-vehicle low-frequency antenna circuit or the second in-vehicle low-frequency antenna circuit or the third in-vehicle low-frequency antenna circuit can be used for sending a low-frequency signal to search for the vehicle key in the vehicle, so that no blind area in the vehicle is ensured.
Further, the method comprises the steps of: a power distribution module, a CAN transceiver;
the power distribution module is connected to the MCU and used for starting the power-on of the engine control module and the electronic steering column lock module according to the control signal of the MCU.
In this embodiment, as shown in fig. 6, in the parking stall state, only when the key unlock signal is detected, the corresponding modules (such as an electronic steering column lock module, an engine control module and an electronic shifter) can be powered on through the internal electromagnetic main switch and the relay, so that the safety of the vehicle during starting is ensured, and meanwhile, the power failure of other modules of the vehicle during parking stall is also ensured.
The MCU is connected to the CAN transceiver for transmitting and receiving signals to the engine control module and the electronic steering column lock module through the CAN transceiver.
In this embodiment, as shown in fig. 7, the keyless starting system in the vehicle is connected with other modules in the vehicle through the CAN transceiver, for example: the vehicle body control module BCM, the engine control module ECM, the electronic steering column lock module ESCL, the instrument control module IPC, the diagnostic instrument Tester, the electronic gear shifter and the like receive and send signals, so that unlocking and starting of other systems are realized.
Furthermore, the MCU, the IMMO driving module and the low-frequency driving module adopt SPI communication.
In the embodiment, the low-frequency driving module and the IMMO driving module adopt an integrated low-frequency antenna special driving chip scheme ATA5291 with a self-diagnosis function, and the MCU CAN diagnose faults such as low-frequency antenna open circuit/ground short circuit/power supply short circuit and the like through SPI communication, and upload CAN buses and transmit the faults to a whole vehicle diagnostic instrument; the IMMO module is integrated in the chip ATA5291, so that the optimized low-frequency antenna can be driven and reused, and the standby vehicle starting function when the electric quantity of the vehicle key is insufficient is realized.
Further, as shown in fig. 5, the present system further includes a first off-board antenna circuit and a second off-board antenna circuit;
the first off-board antenna circuit is connected to the low frequency driving module and is used for detecting and receiving an unlocking signal of the left front door request switch.
The second off-board antenna circuit is connected to the low frequency drive module for detecting and receiving an unlocking signal of the right front door request switch.
In this embodiment, the first and second external antenna circuits are used for external vehicle search for vehicle key signals, and when the driver leaves the vehicle for a certain distance, the first and second external antenna circuits cannot search for the vehicle key signals, the first vehicle outer antenna circuit and the second vehicle outer antenna circuit feed back corresponding signals to the MCU through the low-frequency driving module, and the MCU sends signals to the vehicle body control module through the CAN bus to control locking of the left and right vehicle doors, so that safety of a vehicle after a driver leaves is guaranteed. When a driver returns to the side of the vehicle and wants to open the door, when the left door or the right door is detected to be pulled through the switch detection module, detection signals are fed back to the MCU, the MCU controls the low-frequency module to drive the first vehicle outer antenna circuit and the second vehicle outer antenna circuit to search for a vehicle key, the vehicle door is unlocked after the vehicle key signal is successfully matched with the vehicle key signal, and the driver can get on the vehicle.
Further, the method comprises the steps of: an indicator light driving module;
as shown in fig. 8, the indicator light driving module is connected to the MCU, and is used for driving the switch backlight indicator light, the switch total power indicator light, and the switch power ON indicator light to be started.
In this embodiment, when the vehicle starts, the MCU may control the indicator driving module to drive the indicator to light up, for a start prompt to the driver.
As shown in fig. 9, an embodiment of the present invention provides a keyless starting method for sharing a low-frequency antenna and an IMMO antenna in a vehicle, including:
s1, the switch detection module detects the switch request signal and forwards the switch request signal to the MCU;
s2, the MCU generates a corresponding control signal according to the switch request signal and sends the control signal to the low-frequency driving module;
s3, the low-frequency driving module drives the low-frequency antenna circuit to send out the low-frequency car searching key signal according to a control signal;
s4, if the car key is powered on, the low-frequency car searching key signal is received, and then the high-frequency unlocking signal is sent out;
s5, the high-frequency receiving and transmitting module receives the high-frequency unlocking signal, generates an unlocking signal and transmits the unlocking signal to the MCU;
and S6, the MCU controls the electronic steering column lock module and the engine control module to send an unlocking CAN signal and a starting CAN signal after being electrified.
In the step, due to the blocking of the in-vehicle components, the first in-vehicle low-frequency antenna circuit or the second in-vehicle low-frequency antenna circuit or the third in-vehicle low-frequency antenna circuit can be used for sending out a low-frequency signal to search for the vehicle key in the vehicle, so that no blind area in the vehicle is ensured. Further, the MCU CAN also control the electronic gear shifter to send a start CAN signal after being electrified.
Further, after detecting the switch request signal, the switch detection module forwards the switch request signal to the MCU, and the MCU further includes:
s101, the MCU generates a corresponding control signal according to the switch request signal and sends the control signal to the IMMO driving module;
s102, the IMMO driving module drives the IMMO antenna circuit to be electrified according to a control signal;
s103, if the electric quantity of the vehicle key is insufficient, the vehicle key is close to the IMMO antenna circuit to generate the unlocking mutual inductance signal;
s104, the IMMO antenna driving module forwards the received mutual inductance signal to the MCU;
and S105, the MCU controls the electronic steering column lock module and the engine control module to send an unlocking CAN signal and a starting CAN signal after being electrified.
In this step, the IMMO antenna circuit may be used as either a transmitting antenna or a receiving antenna, and is switched according to different signal transmission directions.
Further, the MCU controls the electronic steering column lock module and the engine control module to be powered on and then comprises:
s601, the MCU sends the CAN unlocking signal and the CAN starting signal to the electronic steering column lock module and the engine control module through the CAN transceiver;
s602, the electronic steering column lock module controls the steering wheel to be unlocked;
the engine control module controls engine start S603.
In the step, the MCU CAN also send a CAN signal to unlock other vehicle modules such as an electronic gear shifter and the like, and start the vehicle, wherein the step of powering on and starting the electronic gear shifter is the same as the step of powering on and starting the electronic steering column lock module and the engine control module.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Claims (10)
1. A keyless start system for use with an in-vehicle low frequency antenna and an IMMO antenna, comprising: MCU, IMMO driving module, low frequency driving module, multiplexing low frequency antenna module in car, high frequency receiving and transmitting module;
the in-vehicle multiplexing low-frequency antenna module includes: multiplexing a low-frequency antenna, a resistor R1, a resistor R2, a resistor R3 and a capacitor C1; the resistor R1, the multiplexing low-frequency antenna and the resistor R2 are sequentially connected in series, and the resistor R1 and the resistor R2 are connected to the IMMO driving module to form an IMMO antenna loop; the resistor R3, the multiplexing low-frequency antenna and the capacitor C1 are sequentially connected in series, and the resistor R3 and the capacitor C1 are connected to the low-frequency driving module to form a low-frequency antenna loop;
the MCU is connected with the IMMO driving module and the low-frequency driving module, and is used for simultaneously starting the IMMO driving module and the low-frequency driving module, when the MCU starts the low-frequency driving module, the MCU drives the low-frequency antenna loop to send out a long-distance low-frequency car searching key signal, and when the MCU starts the IMMO driving module, the MCU drives the IMMO antenna loop to be electrified;
the low-frequency driving module is used for sending out a low-frequency signal of the car searching key, the high-frequency receiving and transmitting module is used for receiving a high-frequency unlocking signal returned by the intelligent car key, and the IMMO driving module is used for receiving a mutual inductance unlocking signal returned by the intelligent car key;
the MCU is connected with the high-frequency receiving and transmitting module and the IMMO driving module, and can unlock the steering wheel and start the engine according to the high-frequency unlocking signal received by the high-frequency receiving and transmitting module, or can unlock the steering wheel and start the engine according to the mutual inductance unlocking signal received by the IMMO driving module.
2. A keyless start system for an in-vehicle low frequency antenna and an IMMO antenna in common as recited in claim 1, wherein the multiplexed low frequency antenna comprises an inductance L1.
3. A keyless start system for sharing an in-vehicle low frequency antenna with an IMMO antenna as claimed in claim 1, comprising: a switch detection module;
the switch detection module is connected to the MCU, and is used for detecting various switch signals and forwarding the detected switch signals to the MCU.
4. A keyless start system for sharing an in-vehicle low frequency antenna with an IMMO antenna as claimed in claim 3, wherein the switch detection module is connected to a brake pedal switch, a start button, a left front door request switch, a right front door request switch, and is configured to detect a switch request signal.
5. The keyless start method for sharing an in-vehicle low frequency antenna with an IMMO antenna according to claim 1, comprising a first in-vehicle low frequency antenna circuit, a second in-vehicle low frequency antenna circuit, a third in-vehicle low frequency antenna circuit;
the first in-car low-frequency antenna circuit, the second in-car low-frequency antenna circuit and the third in-car low-frequency antenna circuit are all connected to the low-frequency driving module and used for sending low-frequency signals to find a car key.
6. A keyless start system for sharing an in-vehicle low frequency antenna with an IMMO antenna as claimed in claim 1, comprising: a power distribution module, a CAN transceiver;
the power distribution module is connected to the MCU and used for starting the power-on of the engine control module and the electronic steering column lock module according to the control signal of the MCU.
The MCU is connected to the CAN transceiver for transmitting and receiving signals to the engine control module and the electronic steering column lock module through the CAN transceiver.
7. The keyless start method shared by a low frequency antenna and an IMMO antenna in a vehicle as claimed in claim 1, wherein the MCU communicates with the IMMO driving module and the low frequency driving module through SPI.
8. The keyless starting method for sharing the in-vehicle low-frequency antenna and the IMMO antenna is based on any one of the keyless starting systems for sharing the in-vehicle low-frequency antenna and the IMMO antenna, and is characterized by comprising the following steps:
the switch detection module detects the switch request signal and forwards the switch request signal to the MCU;
the MCU generates a corresponding control signal according to the switch request signal and sends the control signal to the low-frequency driving module;
the low-frequency driving module drives the low-frequency antenna circuit to send out the low-frequency car searching key signal according to a control signal;
if the car key is powered on, the low-frequency car searching key signal is received and then the high-frequency unlocking signal is sent out;
the high-frequency receiving and transmitting module generates an unlocking signal after receiving the high-frequency unlocking signal and transmits the unlocking signal to the MCU;
and the MCU controls the electronic steering column lock module and the engine control module to send an unlocking CAN signal and a starting CAN signal after being electrified.
9. The keyless start method shared by a low-frequency antenna and an IMMO antenna in a vehicle as claimed in claim 8, wherein the switch detection module detects the switch request signal and forwards the switch request signal to the MCU, and further comprises:
the MCU generates a corresponding control signal according to the switch request signal and sends the control signal to the IMMO driving module;
the IMMO driving module drives the IMMO antenna circuit to be electrified according to a control signal;
if the electric quantity of the vehicle key is insufficient, the vehicle key is close to the IMMO antenna circuit to generate the unlocking mutual inductance signal;
the IMMO antenna driving module forwards the received mutual inductance signal to the MCU;
and the MCU controls the electronic steering column lock module and the engine control module to send an unlocking CAN signal and a starting CAN signal after being electrified.
10. The keyless start method for sharing a low-frequency antenna and an IMMO antenna in a vehicle according to claim 8 or 9, wherein the MCU controlling the electronic steering column lock module and the engine control module after power-up comprises:
the MCU sends the unlocking CAN signal and the starting CAN signal to the electronic steering column lock module and the engine control module through the CAN transceiver;
the electronic steering column lock module controls the steering wheel to be unlocked;
the engine control module controls engine start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310253738.8A CN116238457A (en) | 2023-03-16 | 2023-03-16 | Keyless starting system and method for sharing in-vehicle low-frequency antenna and IMMO antenna |
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| CN202310253738.8A CN116238457A (en) | 2023-03-16 | 2023-03-16 | Keyless starting system and method for sharing in-vehicle low-frequency antenna and IMMO antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771698A (en) * | 2022-04-06 | 2022-07-22 | 德明通讯（上海）股份有限公司 | Low-frequency antenna driving circuit for unlocking two-wheeled electric vehicle |
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2023
- 2023-03-16 CN CN202310253738.8A patent/CN116238457A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771698A (en) * | 2022-04-06 | 2022-07-22 | 德明通讯（上海）股份有限公司 | Low-frequency antenna driving circuit for unlocking two-wheeled electric vehicle |
| CN114771698B (en) * | 2022-04-06 | 2023-11-24 | 德明通讯（上海）股份有限公司 | Low-frequency antenna driving circuit for unlocking two-wheeled electric vehicle |
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