Circuit structure of automobile computer anti-theft matching equipment
By integrating multiple communication protocol modules into the circuit structure, the compatibility and operational complexity issues of traditional car computer anti-theft matching devices are solved, enabling efficient matching and easy maintenance of different car computers.
Patent Information
- Application Number
- CN202520122423.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Traditional car computer anti-theft matching equipment only supports a limited number of communication protocols, making it difficult to meet the diverse needs of the market. The repair process is also complex and inconvenient to operate.
Design a circuit structure that integrates multiple communication protocol modules, including a USB module, multiple communication protocol modules, a main control module, an auxiliary control module, a key frequency detection module, and a power supply module. Through the collaborative work of the main control module and the auxiliary control module, efficient and accurate matching with different car computers can be achieved.
It significantly improves the compatibility and flexibility of the equipment, making it compatible with the vast majority of automotive computers on the market. Its compact circuit structure is easy to maintain and simplifies the repair process.
Smart Images
Figure CN223672446U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of automobile electronic technology especially relates to a circuit structure of automobile computer theftproof matching equipment. BACKGROUND
[0002] Theftproof system is a system set to prevent the theft of the automobile itself or the articles on the automobile. It is composed of remote controller or key, electronic control circuit, alarm device and execution mechanism. There are many methods of theftproof system, including but not limited to traditional mechanical lock, electronic theftproof system, remote theftproof system, engine theftproof system, vehicle positioning tracking system and biological recognition technology. When the mechanical key is lost or the remote key is abnormal, the owner cannot normally use the automobile and needs to send the automobile to the repair shop for professional treatment.
[0003] The traditional automobile computer theftproof matching often only supports limited communication protocols, which is difficult to meet the diversified demand of automobiles on the market. Moreover, the repair personnel need to have professional knowledge and refer to the repair manual of the relevant vehicle model, and the repair process is complicated and the waiting time is long. Therefore, it is particularly important to design an automobile computer theftproof matching equipment circuit structure which can support multiple communication protocols, is easy to operate and has strong compatibility. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a circuit structure of automobile computer theftproof matching equipment to solve the problems in the above background technology. In order to achieve the above purpose, the utility model provides the following technical scheme:
[0005] A circuit structure of automobile computer theftproof matching equipment, comprising a USB module, a plurality of communication protocol modules, a main control module, an auxiliary control module, a key frequency detection module and a power module; the USB module, the plurality of communication protocol modules and the auxiliary control module are connected with the main control module respectively; the plurality of communication protocol modules and the key frequency detection module are connected with the auxiliary control module respectively; the power module is used for providing working voltage for each module; the USB module is used for connecting with PC computer and adapter; the main control module selects one or more communication protocol modules from the plurality of communication protocol modules to realize communication with automobile computer; the auxiliary control module is used for assisting the main control module to set the OBD pin when the communication protocol module communicates with automobile computer.
[0006] Preferably, the plurality of communication protocol modules comprises SWCAN protocol module, CAN / CANFD protocol module, K_LINE protocol module, L_LINE protocol module and J1850 protocol module.
[0007] Preferably, the CAN / CANFD protocol module comprises a CAN transceiver chip and a solid-state relay switch, the solid-state relay switch and the CAN transceiver chip are connected with the master control module respectively, and the master control module performs CAN / CANFD data transceiving work through the solid-state relay switch and the CAN transceiver chip.
[0008] Preferably, the CAN / CANFD protocol module further comprises a filter capacitor, and the filter capacitor is connected between the CAN / CANFD protocol module and the power module.
[0009] Preferably, the SWCAN protocol module comprises a chip of NCV7356D1R2G and a field effect transistor of 2N7002.
[0010] Preferably, the J1850 protocol module comprises a PWM protocol module, a VPW protocol module, a single-pole double-throw switch and a relay K2; the single-pole double-throw switch is used for switching PWM and VPW protocols; and the relay K2 is used for switching a pin of the J1850 protocol module.
[0011] Preferably, the K_LINE protocol module and the L_LINE protocol module both adopt a K bus transceiver chip of L9637D, and the K bus transceiver chip is used for providing bidirectional serial communication.
[0012] Preferably, the master control module adopts a chip of MIMXRT1064DVL6A.
[0013] Preferably, the auxiliary control module adopts a chip of GD32F303VET6.
[0014] Preferably, the key frequency detection module comprises a frequency detection chip of CC1101 and a power supply chip of XC6209B332MR.
[0015] The automobile computer anti-theft matching equipment circuit structure of the utility model has the advantages that: the automobile computer anti-theft matching equipment circuit structure of the utility model integrates multiple communication protocol modules, and the master control module and the auxiliary control module work cooperatively, efficient and accurate matching of different automobile computers is realized, the compatibility and flexibility of the equipment are improved significantly, and the equipment can adapt to most automobile computers on the market. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is the circuit structure principle drawing of the automobile computer anti-theft matching equipment of the utility model
[0017] Figure 2Is the structure schematic diagram of the main control module circuit of the utility model.
[0018] Figure 3 Is the structure schematic diagram of the power module circuit part of the utility model.
[0019] Figure 4 Is the structure schematic diagram of the power module circuit part of the utility model.
[0020] Figure 5 Is the structure schematic diagram of the CAN protocol module circuit of the utility model.
[0021] Figure 6 Is the SWCAN protocol module circuit structure diagram of the utility model.
[0022] Figure 7 Is the structure schematic diagram of the J1850 protocol module of the utility model.
[0023] Figure 8 Is the structure schematic diagram of the K_LINE protocol module of the utility model.
[0024] Figure 9 Is the structure schematic diagram of the auxiliary control module of the utility model.
[0025] Figure 10 Is the structure schematic diagram of the key frequency detection module of the utility model. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.
[0027] As Figure 1 Shown, a kind of automobile computer theft-proof matching system, including USB module, multiple communication protocol modules, main control module, auxiliary control module, key frequency detection module, power module, LCD display module, touch screen module, SDRAM module, SD card module, WIFI module and encryption chip IS32 module;USB module, multiple communication protocol modules and auxiliary control module are connected with main control module respectively;Multiple communication protocol modules and key frequency detection module are connected with auxiliary control module respectively.
[0028] The circuit structure of the automobile computer anti-theft matching equipment of the embodiment of the application realizes efficient and accurate matching of different automobile computers through the cooperation of the main control module and the auxiliary control module by integrating various communication protocol modules, significantly improves the compatibility and flexibility of the equipment, and can adapt to most automobile computers on the market. In addition, the circuit structure is compact and easy to maintain, which brings great convenience to the automobile repair and anti-theft matching industry.
[0029] Referring to Figure 3 and Figure 4 , the power module is used for processing the accessed power supply, and the delivery end with multiple different voltage values is used for providing working voltage for each module. The power module mainly includes a compatible OBD 12V and DC 12V external power input module, a 3.3V battery power supply module, a charging module with a chip model of BQ24196, a CW2015 battery power detection module, and a key switch module, wherein a step-down chip with a model of RT7272, a step-up chip with a model of RT9266, a field effect tube with a model of A04409, a field effect tube with a model of TSM085, and a special clock / timing chip with a model of FT7521L6X are used.
[0030] Referring to Figure 4 , the power module further includes a step-down chip with a model of RT7272BGSP. The step-down chip of the step-down chip is connected to the output end POWER_IN after passing through four filter capacitors C1, C2, C3 and C4. The FB end of the step-down chip of the RT7272BGSP outputs a 0.8V voltage, which is led out through the voltage boosting resistors R4 and R5 to the VDD_5V_OUT end, and then led out through the filter capacitors C159, C172 and C173 to the 5V_SYS end, and then led out through the voltage boosting resistor R785 to the VDD_5V_AUX end.
[0031] Referring to Figure 3, the power module further comprises a diode D1, a fuse PF1 and a fuse PF2, one end of the diode D1 is connected to the power connector P1, the other end is connected to the fuse PF1 and then leads out an output terminal POWER_IN, the diode D1 is also connected to the TVS tube D2 and then grounded, one end of the fuse PF2 is connected to the power connector OBD_12V_IN, the other end is connected to the diode D79 and then connected between the fuse PF1 and the output terminal POWER_IN, and five filter capacitors C5, C95, C96, C28 and C38 are arranged between the fuse PF1 and the output terminal POWER_IN. After the power is input from P1, it passes through the diode D1 (which prevents the polarity of the power supply from being reversed and prevents the voltage from flowing backward from the DB15 terminal), then passes through the fuse PF1 (the function of PF1 is to melt the fuse when the current flowing through it exceeds its rated current, thereby protecting the circuit). D2 is a TVS tube, mainly used to prevent excessive surges from damaging the backend circuit, and the backend five capacitors C5, C95, C96, C28 and C38 are mainly used for energy storage and filtering.
[0032] Referring to Figure 2 , the master control module adopts a chip with a model number of MIMXRT1064DVL6A, and the master control module can select one or more communication protocol modules from multiple communication protocol modules to work according to the situation, so as to realize communication with the automobile computer. The multiple communication protocol modules include a SWCAN protocol module, a CAN / CANFD protocol module, a K_LINE protocol module, an L_LINE protocol module and a J1850 protocol module, and the principles of the various protocol modules are as follows:
[0033] Referring to Figure 5 , the CAN / CANFD protocol module includes a solid-state relay switch G3VM-61VY2-TR and a CAN transceiver chip with a model number of MCP2562FD, the CAN transceiver chip and the solid-state relay switch are connected with the master control module, and the master control module performs CAN / CANFD data transceiving work through the solid-state relay switch and the CAN transceiver chip. The master control module sends instructions to the auxiliary control module through serial ports UART3_TX and UART3_RX, controls the solid-state relay switch U179 to enable the terminal resistor R402, reduces the reflected energy, improves the signal quality, improves the anti-interference ability, and ensures that the bus quickly enters the invisible state. The master control module realizes the transmission of signals between the master control module and the detected device by sending instructions and data to the MCP2562FD chip. The CAN / CANFD protocol module further comprises filter capacitors C98 and C99, which are connected between the CAN / CANFD protocol module and the power module, and prevent noise and ringing phenomena caused by sudden increase of the power supply VDD_5V_AUX by storing and releasing electrical energy.
[0034] Referring to Figure 6The SWCAN protocol module includes a chip of model NCV7356D1R2G and two field effect tubes of model 2N7002. The chip is used to realize the transmission of signals between the main control module and the detected device. Meanwhile, the working mode of the NCV7356D1R2G chip is controlled by the auxiliary control module, so as to support a signal transmission rate of up to 100K / s.
[0035] Referring to Figure 7 The J1850 protocol module includes the PWM protocol module, the VPW protocol module, a single-pole double-throw switch of model RS2105 and a relay K2. The PWM protocol module includes an LM317LID chip, a MOS tube Q30 and a MOS tube Q29. The PWM_EN output high level of the MOS tube Q30 is used to drive the MOS tube Q30 to be turned on, and the MOS tube Q30 drives the LM317LID chip to work. The VPW protocol module includes an LM293DT chip. When the J1850_PWM_EN is high, the J1850_PWM_RX_EN is high and the J1850_VPW_EN is low, the VDD_J1850_AUX is 5V, and the PWM protocol is selected. When the J1850_PWM_EN is low, the J1850_VPW_EN is high and the J1850_PWM_RX_EN is low, the VDD_J1850_AUX is 8V, and the VPM protocol is selected. The PWM protocol is used for data interaction in a half-duplex mode (differential signal). The communication pins are J1850_BUS_P and J1850_BUS_N. The communication voltage difference is 5V. The protocol mainly controls the MOS tube Q29 and the transistor Q28 through the J1850_TX to send signals. The receiving end compares the voltage of pins 5 and 6 of the LM293DT chip to output high and low levels of pin 7 (J1850_BUS_P>J1850_BUS_N, 3.3V high level is output, otherwise 0V low level is output). The main control module demodulates through high and low levels of time. The VPM protocol is single-wire data transmission. The communication pin is J1850_BUS+ (J1850_BUS_P in the figure). The communication voltage is 8V. The protocol mainly controls the MOS tube Q31 through the J1850_TX to send signals. The receiving end compares the voltage of pins 3 and 2 of the LM293DT chip to output high and low levels of pin 1 (higher than 4V, 3.3V high level is output; lower than 4V, 0V low level is output). The main control module demodulates through high and low levels of time. The auxiliary control module controls the relay K2 through the high and low levels of the J1850_PWM_VPW_PIN2_SW pin to realize the communication between the J1850 protocol module and the external device. The single-pole double-throw switch is used to switch the PWM and VPW protocols. The relay K2 is used to switch the pins of the J1850 protocol module.
[0036] Referring to Figure 8, K_LINE protocol module and L_LINE protocol module both adopt K bus transceiver chip of model L9637D, and the K bus transceiver chip is used for providing bidirectional serial communication for the anti-theft system.When the L9637D chip is powered on, the voltage of 4 feet is compared with the internal Vbat / 2 (Vbat / 2 is the reference voltage generated inside the chip), if the voltage of 4 feet is less than Vbat / 2, then the voltage of 6 feet is pulled to low level as digital signal 0 output, otherwise the voltage of 6 feet is pulled to high level as digital signal 1 output, in this way K_LINE can output digital signal; similarly, by comparing the voltage of 6 feet and internal Vbat / 2, the corresponding high and low level is output at 1 feet, and the master control module realizes the input of digital signal by capturing the level of 1 feet; at the same time, the auxiliary control module configures the pull-up resistor of KLINE bus by controlling two triodes of model MBT3946DW.
[0037] Referring to Figure 9 , the auxiliary control module is used for assisting the master control module to set the OBD pin when the communication protocol module communicates with the automobile computer. The auxiliary control module adopts the chip of model GD32F303VET6, communicates with the master control module through a UART3 serial port, receives the command of the master control module and executes corresponding configuration operation, and assists the master control module to detect whether there is power input at the OBD_DB15 end through the equipped ADC peripheral. The master control module in combination with the auxiliary control module can select the corresponding communication protocol module and the correct OBD pin to realize communication according to the protocol supported by the related automobile computer, and then complete the corresponding anti-theft matching.
[0038] The USB module is used for connecting with the PC computer and the adapter.
[0039] Referring to Figure 10 , the key frequency detection module is used for identifying the key frequency. The key frequency detection module includes the frequency detection chip of model CC1101 and the power supply chip of model XC6209B332MR. The key frequency detection module CC1101 adopts the standard voltage DVDD output by the power supply chip for power supply, communicates with the auxiliary control module through a SPI bus, feeds back the identified key frequency information to the auxiliary control module, and then feeds back to the master control module through the serial port by the auxiliary control module.
[0040] 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 person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in 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 an automotive computer anti-theft matching device, characterized in that, The USB module, the plurality of communication protocol modules, the main control module, the auxiliary control module, the key frequency detection module and the power module are connected with the main control module respectively; the plurality of communication protocol modules and the key frequency detection module are connected with the auxiliary control module respectively; the power module is used for providing working voltage for each module; the USB module is used for connecting with PC computer and adapter; the main control module selects one or more communication protocol modules from the plurality of communication protocol modules to realize communication with automobile computer; the auxiliary control module is used for assisting the main control module to set OBD pin when the communication protocol module communicates with automobile computer.
2. The circuit structure of claim 1, characterized in that: The plurality of communication protocol modules comprises SWCAN protocol module, CAN / CANFD protocol module, K_LINE protocol module, L_LINE protocol module and J1850 protocol module.
3. The circuit structure of claim 2, characterized in that: The CAN / CANFD protocol module comprises CAN transceiver chip and solid state relay switch, the solid state relay switch and the CAN transceiver chip are connected with the main control module respectively, and the main control module performs CAN / CANFD data transceiving work through the solid state relay switch and the CAN transceiver chip.
4. The circuit structure of claim 3, characterized in that: The CAN / CANFD protocol module further comprises filter capacitor, which is connected between the CAN / CANFD protocol module and the power module.
5. The circuit structure of claim 2, wherein: The SWCAN protocol module comprises chip with model number NCV7356D1R2G and field effect tube with model number 2N7002.
6. The circuit structure of claim 2, wherein: The J1850 protocol module comprises PWM protocol module, VPW protocol module, single-pole double-throw switch and relay K2; the single-pole double-throw switch is used for switching PWM and VPW protocol; the relay K2 is used for switching pin of the J1850 protocol module.
7. The circuit structure of claim 2, wherein: The K_LINE protocol module and the L_LINE protocol module both adopt K bus transceiver chip with model number L9637D, which is used for providing bidirectional serial communication.
8. The circuit structure of claim 1, wherein, The main control module adopts chip with model number MIMXRT1064DVL6A.
9. The circuit structure of claim 2, wherein, The auxiliary control module adopts chip with model number GD32F303VET6.
10. The circuit structure of claim 1, wherein, The key frequency detection module comprises frequency detection chip with model number CC1101 and power chip with model number XC6209B332MR.