Circuit structure of automobile general remote control key generation tool

Abstract

The utility model discloses a circuit structure of an automobile general remote control key generation tool. The circuit structure comprises a power supply module, a CORE module, an LCD module, an MCU module, a wired sub-machine generation module, a remote control copy module, an anti-theft data acquisition module, an encryption chip protection module and an intelligent sub-machine generation and chip identification module. The power supply module is used for supplying power to other modules; the LCD module and the MCU module are respectively and electrically connected with the CORE module; the wired sub-machine generation module, the remote control copying module, the anti-theft data acquisition module, the encryption chip protection module and the intelligent sub-machine generation and chip identification module are electrically connected with the MCU module respectively. The circuit structure can be compatible with generation of remote control keys of various automobile brands and models, operation difficulty is reduced, universality and practicability of tools are improved, safety and stability of data transmission can be guaranteed, and data are prevented from being stolen or tampered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile electronic technology especially relates to a circuit structure of general remote key generating tool of car. BACKGROUND

[0002] With the development of the automobile industry, the types and functions of automobile keys are increasingly diversified. Remote keys equipped by different brands and models of cars differ in technology and specifications, which brings many inconveniences to the car owners when the keys are lost, damaged or need to be added as spare keys. The existing automobile remote key generating tools are mostly single-function, only supporting the generation of remote keys of specific brands of cars, and cannot meet the needs of diversified automobile remote keys in the market, bringing great inconvenience to automobile maintenance personnel in the process of maintenance. Therefore, it is of great practical significance to develop a general remote key generating tool that can be compatible with various car brands and models. SUMMARY

[0003] The utility model aims at providing a kind of circuit structure of general remote key generating tool of car, to solve the problems raised in the above background technology. The utility model aims at realizing by the following technical scheme:

[0004] A kind of circuit structure of general remote key generating tool of car, including power module, CORE module, LCD module, MCU module, wired submachine generation module, remote copy module, anti-theft data acquisition module, encryption chip protection module, intelligent submachine generation and chip identification module;The power module is used to power supply for each module;The LCD module and the MCU module are electrically connected with the CORE module respectively;The wired submachine generation module, the remote copy module, the anti-theft data acquisition module, the encryption chip protection module, the intelligent submachine generation and chip identification module are electrically connected with the MCU module respectively.

[0005] Preferably, the CORE module carries Android system.

[0006] Preferably, the CORE module communicates with the LCD module through MiPi protocol, and touch is realized through I2C and CORE module.

[0007] Preferably, the wired submachine generation module, the remote copy module, the anti-theft data acquisition module and the encryption chip protection module communicate with the MCU module through SPI protocol.

[0008] Preferably, the wired sub-machine generation module comprises a chip U2 of model NUP4114UPXV6T1G and a PS2 socket; the chip U2 is electrically connected with the PS2 socket and the MCU module respectively; the key is connected with the PS2 socket to realize communication with the MCU module.

[0009] Preferably, the remote copy module comprises a chip U14 of model CMT2300A and a resonance circuit, and the chip U14 is electrically connected with the resonance circuit and the MCU module respectively; the resonance frequency of the resonance circuit is 125k.

[0010] Preferably, the anti-theft data acquisition module comprises an LC parallel resonance circuit, a bridge circuit and a voltage comparator connected in sequence, and the voltage comparator is electrically connected with the MCU module.

[0011] Preferably, the encryption chip protection module adopts an encryption chip of model IS32U512A, and the data of the MCU module is sent to the CORE module after AES encryption by the encryption chip.

[0012] Preferably, the intelligent sub-machine generation and chip identification module comprises an MCP6024T chip and a resonance circuit, the MCP6024T chip is electrically connected with the resonance circuit and the MCU module respectively, and the resonance circuit supports ASK and FSK signal modulation.

[0013] Preferably, the power module comprises a power input module and a power output module; the power input module is used for providing power supply for the subsequent circuit; and the power output module is used for processing the power processed by the power input module, and obtaining a plurality of delivery ends with different voltage values for providing working voltage for other modules.

[0014] The automobile universal remote key generation tool has the advantages that: the circuit structure of the automobile universal remote key generation tool integrates a plurality of function modules, and through the cooperative work of the modules, the generation, copying, identification and data encryption of the automobile remote key are realized, the tool can be compatible with the remote key generation of a plurality of automobile brands and models, the operation difficulty is reduced, and the universality and practicality of the tool are greatly improved. Meanwhile, through the adoption of the advanced communication protocol and encryption technology, the safety and stability of data transmission are ensured, and data theft or tampering is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a system block diagram of an embodiment of the utility model;

[0016] Figure 2 is a principle schematic view of the CORE module of an embodiment of the utility model.

[0017] Figure 3 is a principle schematic diagram of the MCU module of the embodiment of the utility model.

[0018] Figure 4 is a principle schematic diagram of the power input module of the embodiment of the utility model.

[0019] Figure 5 is a principle schematic diagram of the power output module of the embodiment of the utility model.

[0020] Figure 6 is a principle schematic diagram of the LCD module of the embodiment of the utility model.

[0021] Figure 7 is a principle schematic diagram of the sub-machine generating module of the embodiment of the utility model.

[0022] Figure 8 is a principle schematic diagram of the remote control copying module of the embodiment of the utility model.

[0023] Figure 9 is a principle schematic diagram of the anti-theft data acquisition module of the embodiment of the utility model.

[0024] Figure 10 is a principle schematic diagram of the encryption chip protection module of the embodiment of the utility model.

[0025] Figure 11 is a principle schematic diagram of the intelligent sub-machine generating and chip identification module of the embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0027] In the description of the present application, it should be clear that the terms "vertical", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not mean that the device or element referred to must have a particular orientation or position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] As Figure 1 shown, a circuit structure of a general-purpose remote key generation tool for automobiles includes a power module, a CORE module, an LCD module, an MCU module, a wired sub-machine generation module, a remote copy module, a theftproof data acquisition module, an encryption chip protection module, and an intelligent sub-machine generation and chip identification module. The power module is used to supply power to other modules. The LCD module and the MCU module are electrically connected with the CORE module. The wired sub-machine generation module, the remote copy module, the theftproof data acquisition module, the encryption chip protection module, and the intelligent sub-machine generation and chip identification module are electrically connected with the MCU module. Through the cooperative work of the modules, the generation, copy, identification, and data encryption of the automobile remote key are achieved, and the tool is compatible with the generation of remote keys of various automobile brands and models, reduces the operation difficulty, and greatly improves the versatility and practicality of the tool. At the same time, through the use of advanced communication protocols and encryption technology, the safety and stability of data transmission are ensured, and data theft or tampering is prevented.

[0029] As Figure 4 and Figure 5As shown, the power module includes a power input module and a power output module. The power input module is used to provide stable power supply for the rear circuit, and the power input module includes typec, resistance, TVS, diode and battery. When the battery is out of power, it can be charged through TYPE. The TYPEC module can also realize communication with the upper computer. The power output module is used to process the power processed by the power input module, and obtains a plurality of different voltage values of the delivery end for providing appropriate working voltage for other modules. The power output module includes a step-down chip with model RT9080-33GJ5, a step-down chip with model TPS62260DDCR and a step-up chip with model TPS61230DRCR. The battery voltage can be stably reduced to 3.3v by RT9080-33GJ5 for use in the rear circuit, the battery voltage can be stably output to 3.3v by TPS62260DDCR for use in the MCU, and the battery voltage can be stably boosted to 5V by TPS61230DRCR for use in the key generation and other power-consuming functions in the rear stage. In the circuit structure of the RT9080-33GJ5 step-down chip, C11 and C12 filter capacitors are connected in parallel to the battery end, the control pin (3 pin) of the step-down chip is connected with the pull-down resistor R24 and controls whether the step-down chip works through the KPROW1 pin of the CORE module, and the other end is connected with the output end +3.3V through six filter capacitors. In the circuit structure of the TPS62260DDCR step-down chip, C9 and C17 filter capacitors are connected in parallel to the battery end, the control pin (3 pin) of the step-down chip controls whether the step-down chip works through the KPROW1 pin of the CORE module, and the VOUT pin (5 pin) of the other end is connected with the inductor and one end of the voltage dividing resistor R27 to output the output end +3V3, the other end of R27 is connected with the FB pin (4 pin) and the R26 in series to ground, and 19 filter capacitors C18, C23, C24, C25, C64, C66, C69, C70, C72, C75, C76, C82, C90, C91, C93, C95, C97, C180 and C181 are arranged between one end of R27 and the output end +3V3. In the circuit structure of the TPS61230DRCR step-up chip, C7 and C19 filter capacitors are connected in parallel to the battery end, the KPROW1 pin of the CORE module is connected with the R18 and R19 in series to ground, and the other end of R19 is connected with the control pin (9 pin) of the step-up chip to control whether the step-up chip works.

[0030] As Figure 2As shown, the most essential role of the CORE module is to be able to carry the Android system, the Android system responsible for processing and generating display data, the CORE module gets the data processed by the MCU module to encode and transmit in the LCD module through the MiPi protocol, the LCD module collects the touch data of the operator and transmits it to the CORE module through the I2C protocol. The operator only needs to click the function on the LCD to call the function of each module to achieve the purpose of human-computer interaction, which is convenient for the operator to operate; and its functional diversity has a dedicated encryption system to provide good security.

[0031] As shown in Figure 6 The LCD module includes a chip U7 of model AP3128AE3036ES6, an inductor L1, a freewheeling diode D5, a resistor and a capacitor constituting a backlight boost circuit, which can boost the battery voltage to 35V, the purpose is to provide backlight for the LCD screen; the LCD module also includes a customized screen, the customized screen communicates with the CORE module through the MIPI protocol. The LCD module receives the MiPi protocol signal from the CORE module, decodes and processes it, and then converts the data into image information for display on the display screen, the customized screen also communicates with the CORE module through the I2C protocol, and transmits the collected touch data to the CORE module to achieve human-computer interaction, such as displaying the operation steps, state information, etc. generated by the key.

[0032] As shown in Figure 3 The MCU module has rich peripherals and can carry rich peripheral circuits, the wired submachine generation module, the remote control copy module, the anti-theft data acquisition module and the encryption chip protection module communicate with the MCU module through the SPI protocol. The MCU module can select and call the wired submachine generation module, the remote control copy module, the anti-theft data acquisition module, the intelligent submachine generation and chip identification module according to the situation to work, so as to meet the corresponding needs of customers and realize the multifunction of products.

[0033] As shown in Figure 7 The wired submachine generation module includes a chip U2 of model NUP4114UPXV6T1G and a PS2 socket (J2), a triode Q1, and the chip U6 is electrically connected with the PS2 socket and the MCU module; the key is connected with the PS2 socket to realize communication with the MCU module, the program of the MCU module is written into the key submachine through the SPI protocol (PC3, PC6, PB11, PC7), and U2 is a TVS tube integrated to prevent static electricity from affecting the internal equipment.

[0034] As shown in Figure 8As shown, the remote copy module includes a chip U14 of model CMT2300A and a resonant circuit, the chip U14 is electrically connected with the resonant circuit and the MCU module respectively; the resonant frequency of the resonant circuit is 125k, when copying the key, the CMT2300A chip will generate a normal signal, and then directly load the normal signal on the carrier signal. The MCU module writes the data to be sent into the CMT2300A chip through SPI, and the CMT2300A chip sends out the received data through the 125khz resonant circuit; similarly, when receiving data, the CMT2300A chip can demodulate the required data and send it to the MCU module for processing through SPI.

[0035] As shown in Figure 9 As shown, the circuit structure of the anti-theft data acquisition module mainly includes an LC parallel resonant circuit composed of a rod-shaped antenna, a capacitor, a Schottky diode array (BAS3007A), a diode D7, a voltage stabilizing tube D6, an operational amplifier U21, a diode D8, a bridge circuit and a voltage comparator, the voltage comparator is electrically connected with the MCU module. Among them, the LC parallel resonant circuit composed of the rod-shaped antenna and the capacitor can collect a specific frequency; the collected frequency signal can be converted into pulsating direct current through the bridge circuit composed of diodes, and the pulsating direct current can be converted into a standard rectangular wave through the voltage comparator composed of U21, R55, D6, D7, R63, R61, R62 and R54, which can be converted into a low-frequency signal that can be read by the MCU, so that the io port (PA9) of the MCU module can read normal data.

[0036] As shown in Figure 10 As shown, the encryption chip protection module adopts an encryption chip of model IS32U512A, the data to be sent by the MCU module to the CORE module needs to be sent to the encryption chip through the SPI protocol before being sent, and the encryption chip can send the data to the CORE module only after the data is encrypted by AES, and the CORE module can obtain the original program only by using the same decryption method.

[0037] As shown in Figure 11 As shown, the intelligent sub-machine generation and chip identification module includes a MCP6024T chip and a resonant circuit, the MCP6024T chip is electrically connected with the resonant circuit and the MCU module respectively, and the resonant circuit supports ASK and FSK signal modulation. The resonant circuit includes R120, R121, RF3, C136, C137, C141, C149, C148 and C165, and the resonant frequency formula is Therefore, by changing Q6, Q7, Q9 and Q4, the resonant capacitor C can be changed, and thus the resonant frequency can be changed. The product makes Q6, Q7, Q9 and Q4 all conduct, so that the carrier frequency is stabilized at 125 kHz. When the module is in transmission, the IO port (PC8) of the MCU will generate a normal signal. Since the driving ability of the IO port of the MCU is weak, U27 is connected after the IO port to improve the driving ability, and the device will not reverse the output signal, that is, the Boolean function is Y=A. When the normal signal is high, Q5 is turned on, and at this time, no signal is transmitted; when the normal signal is low, Q8 is turned on, and at this time, the resonant circuit will generate a high-frequency carrier signal to load the normal signal onto the carrier signal. This change of the frequency of the carrier signal by changing the normal signal is called frequency modulation. When the chip that identifies the FSK frequency is identified, the frequency change is first converted into a voltage change by the frequency discriminator composed of U29C, and the signal comes to the band-pass filter circuit composed of C167, R138, R136 and C200, and finally the signal is amplified by the non-inverting amplifier circuit composed of U29D. The signal amplification times can be obtained from the transfer function. When the chip that identifies the ASK frequency is identified, the signal passes through the envelope detection circuit composed of D13, R90, C117, C111, D10, D14 and R89, removes the high-frequency carrier signal, and only retains the low-frequency signal corresponding to the modulated signal. Then, the signal passes through the band-pass filter circuit composed of U29A to filter out unnecessary signals, and finally, the signal is processed into a standard rectangular wave by RC filtering and voltage hysteresis comparison, so that the PB8 of the MCU module can be read.

[0038] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A circuit structure for a universal car remote key generation tool, characterized in that, The application relates to a smart machine module, which comprises a power module, a CORE module, an LCD module, an MCU module, a wired submachine generation module, a remote control copying module, a theftproof data acquisition module, an encryption chip protection module and an intelligent submachine generation and chip identification module.

2. The circuit structure of claim 1, characterized in that: The CORE module is equipped with an Android system.

3. The circuit structure of claim 2, characterized in that: The CORE module communicates with the LCD module through an MiPi protocol.

4. The circuit structure of claim 1, wherein: The wired submachine generation module, the remote control copying module, the theftproof data acquisition module and the encryption chip protection module communicate with the MCU module through an SPI protocol.

5. The circuit structure of claim 4, characterized in that: The wired submachine generation module comprises a chip U2 with a model number of NUP4114UPXV6T1G and a PS2 socket; the chip U2 is electrically connected with the PS2 socket and the MCU module respectively; a key is connected with the PS2 socket to realize communication with the MCU module.

6. The circuit structure of claim 4, wherein: The remote control copying module comprises a chip U14 with a model number of CMT2300A and a resonance circuit; the chip U14 is electrically connected with the resonance circuit and the MCU module respectively; the resonance frequency of the resonance circuit is 125k.

7. The circuit structure of claim 4, wherein: The theftproof data acquisition module comprises an LC parallel resonance circuit, a bridge circuit and a voltage comparator which are connected in sequence; the voltage comparator is electrically connected with the MCU module.

8. The circuit structure of claim 4, wherein: The encryption chip protection module adopts an encryption chip with a model number of IS32U512A; data of the MCU module is sent to the CORE module after being encrypted by the encryption chip through AES.

9. The circuit structure of claim 1, wherein: The intelligent submachine generation and chip identification module comprises an MCP6024T chip and a resonance circuit; the MCP6024T chip is electrically connected with the resonance circuit and the MCU module respectively; the resonance circuit supports ASK and FSK signal modulation.

10. The circuit structure of claim 1, wherein: The power module comprises a power input module and a power output module; the power input module is used for providing power supply for the subsequent circuit; the power output module is used for processing the power supply processed by the power input module, obtaining a plurality of delivery ends with different voltage values and providing working voltage for other modules.

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