A low-cost type vehicle lock controller
By using a low-cost vehicle lock controller, which utilizes an MCU chip and a relay control module, remote control of vehicle doors and lights is achieved, solving the problem of insufficient convenience of existing mechanical vehicle locks and providing reliable remote switching functions and malfunction protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHIMINGSHI INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-05
AI Technical Summary
Existing mechanical car locks are difficult to open and close remotely, and their ease of use is not ideal.
This low-cost vehicle lock controller, which uses an MCU chip, includes a relay control module, a power chip, a protection circuit, and an antenna receiving module. It enables remote opening and closing of vehicle doors and lights through signal processing and relay control, and has an abnormal signal protection mechanism.
It enables low-cost and reliable remote control of vehicle doors and lights, reduces the cost of mechanical locks, improves ease of use, and prevents accidents in abnormal situations.
Smart Images
Figure CN224328430U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle lock controller technology, specifically a low-cost vehicle lock controller. Background Technology
[0002] With the advancement of technology and the popularization of smart door locks, the automotive industry has also begun to develop towards intelligent doors. The application of radio frequency technology in car locks has brought great convenience to people's lives. In the existing technology, mechanical car locks are difficult to remotely open and close, making their ease of use less than ideal. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a low-cost vehicle lock controller, which solves the aforementioned problems.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a low-cost vehicle lock controller, including an MCU chip, the output terminal of the MCU chip is connected to a relay control module, the input terminal of the MCU chip is connected to a power supply chip, and the connection terminal of the MCU chip is connected to an antenna receiving module and a protection circuit;
[0005] The MCU chip is used to receive and process electrical signals and to control the relay control module;
[0006] The relay control module includes three electromagnetic relays and transistors. The relay control module is used to control the vehicle lights and the left and right door switches.
[0007] The power chip is used to reduce the 24V voltage input obtained from the internal circuitry of the vehicle to a 5V output to power the MCU chip and the antenna receiving module.
[0008] The protection circuit is used to transmit abnormal signals to the MCU chip via AD conversion and connect to ground to interrupt the relay operation;
[0009] The antenna receiving module is used to receive external signals and convert the received signals into electrical signals, which are then input to the MCU chip.
[0010] Preferably, the MCU chip is a PY32F002BF15P6 microcontroller with a 32-bit ARM® Cortex®-M0+ core and a TSSOP20 package. It features a simple structure, ease of learning and programming, ultra-low power consumption, energy-saving operation, and a streamlined code density. The microcontroller also has 24Kbytes of Flash memory for efficient data processing. In addition, the microcontroller contains an SPI, a USART, and an I2C interface, making it compatible with a wide range of external devices.
[0011] Preferably, the relay control module is specifically used to control the vehicle lights through one electromagnetic relay and to control the opening and closing of the left and right doors through two other electromagnetic relays.
[0012] Preferably, the transistor is connected to one pole of the electromagnetic relay, and the electromagnetic relay is connected to the internal circuitry of the vehicle.
[0013] Preferably, the power chip is model LM78L05, which features low power consumption, an extended common-mode input voltage range, and supports both single and dual power supply modes.
[0014] Preferably, the protection circuit is specifically used to transmit the abnormal signal to the MCU chip via AD conversion through the NCV2904 operational amplifier. The MCU chip judges the signal and transmits it to the protection circuit through the microcontroller pin, so that the MOSFET is turned on and connected to ground, and the relay is interrupted. The operational amplifier has more significant advantages in single-supply applications. The chip has a wide operating voltage range, extremely low quiescent current, and the common-mode input range includes the negative power supply voltage, which can eliminate the need for external bias components in most applications. At the same time, the voltage range also covers the negative power supply voltage, which can be used in multiple scenarios.
[0015] Preferably, the antenna receiving module is specifically used to receive external signals through a BC2502 signal receiver, convert the received signals into electrical signals, and input them to the MCU chip. The signal receiver has the advantages of high functional integration, low cost and low power consumption, and has an interface that can be adapted to the MCU chip, as well as a relatively rich selection of operating frequency bands.
[0016] Preferably, the communication protocol between the antenna receiving module and the MCU chip is set to the I2C protocol.
[0017] This invention provides a low-cost vehicle lock controller. Compared with the prior art, it has the following advantages:
[0018] 1. This low-cost car lock controller receives external signals through an antenna receiving module, converts the collected signals into electrical signals through a signal receiver, and inputs them to the MCU chip. After processing by the microcontroller, the microcontroller controls three electromagnetic relays to control the brightness of the car lights and the opening and closing of the car doors. Compared with mechanical car locks, it is more convenient to use, effectively reduces the cost of existing technologies, and is more reliable. The selected chip has richer functions, can adapt to more usage environments, has lower power consumption, and can better serve daily functional needs.
[0019] 2. This low-cost car lock controller, when the electromagnetic relays controlling the two doors malfunction, will send an abnormal electrical signal to the protection circuit. At this time, the operational amplifier will transmit the abnormal signal back to the MCU chip through AD conversion. The MCU chip will judge and transmit the signal to the protection circuit through the microcontroller pin, so that the MOSFET is turned on and connected to ground, thereby interrupting the relay to continue working and preventing accidents. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a circuit diagram of the MCU chip and antenna receiving module of this utility model;
[0022] Figure 3 This is a circuit diagram of the relay control module, protection circuit, and power supply chip of this utility model.
[0023] In the diagram: 1. MCU chip; 2. Relay control module; 3. Power supply chip; 4. Protection circuit; 5. Antenna receiving module. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figures 1-3 This utility model provides a technical solution: a low-cost vehicle lock controller, including an MCU chip 1, an output terminal of the MCU chip 1 connected to a relay control module 2, an input terminal of the MCU chip 1 connected to a power chip 3, and an antenna receiving module 5 and a protection circuit 4 connected to the connection terminal of the MCU chip 1.
[0026] MCU chip 1 is used to receive and process electrical signals and control relay control module 2. MCU chip 1 is a PY32F002BF15P6 microcontroller with a 32-bit ARM® Cortex® - M0+ core and a TSSOP20 package. The core of MCU chip 1 is an entry-level 32-bit Arm Cortex processor designed for a wide range of embedded applications. This processor has a simple structure, is easy to learn and program, has ultra-low power consumption, can operate in an energy-saving manner, and also has a streamlined code density. The microcontroller also has 24Kbytes of Flash memory, which can efficiently process data. The microcontroller also contains an SPI, USART and an I2C interface, which can be compatible with a variety of external devices.
[0027] The relay control module 2 includes three electromagnetic relays and a transistor. The relay control module 2 is used to control the vehicle lights and the left and right door switches. Specifically, the relay control module 2 is used to control the vehicle lights through one electromagnetic relay and to control the left and right door switches through the other two electromagnetic relays. The transistor is connected to one terminal circuit of the electromagnetic relay, and the electromagnetic relay is connected to the internal circuit of the vehicle.
[0028] Power chip 3 is used to reduce the 24V input voltage obtained from the internal circuit of the car to a 5V output to power MCU chip 1 and antenna receiving module 5. The power chip 3 is model LM78L05, which has low power consumption, extended common-mode input voltage range, and supports both single and dual power supply modes.
[0029] Protection circuit 4 is used to transmit abnormal signals to MCU chip 1 via AD conversion and connect them to ground, interrupting the relay. Specifically, protection circuit 4 uses an NCV2904 operational amplifier to transmit abnormal signals to MCU chip 1 via AD conversion. MCU chip 1 judges the signal and transmits it to protection circuit 4 through a microcontroller pin, causing the MOSFET to connect to ground and interrupting the relay. This operational amplifier has more significant advantages in single-supply applications. The chip has a wide operating voltage range, extremely low quiescent current, and the common-mode input range includes the negative power supply voltage, which can eliminate the need for external bias components in most applications. At the same time, the voltage range also covers the negative power supply voltage, making it suitable for multiple application scenarios.
[0030] Antenna receiving module 5 is used to receive external signals and convert the received signals into electrical signals, which are then input to MCU chip 1. Specifically, antenna receiving module 5 is used to receive external signals through BC2502 type signal receiver, convert the received signals into electrical signals, and input them to MCU chip 1. The communication protocol between antenna receiving module 5 and MCU chip 1 is set to I2C protocol. The signal receiver has the advantages of high functional integration, low cost and low power consumption, and has an interface that is compatible with MCU chip 1, as well as a relatively rich selection of operating frequency bands.
[0031] During operation, when the antenna receiving module 5 receives an external signal, it converts the collected signal into an electrical signal via the BC2502 signal receiver using the I2C protocol. This signal is then input to the MCU chip 1. After processing by the microcontroller, the microcontroller controls three electromagnetic relays to control the brightness of the vehicle lights and the opening and closing of the doors. By connecting the MMBTA42Q5 transistor to one terminal of the electromagnetic relay circuit, when the MCU chip 1 sends a signal, a voltage difference is formed between the relay and the other terminal directly connected to the power input. This voltage difference controls the on / off state of the door and light circuits through electromagnetic induction, thereby controlling the switches. This effectively reduces the cost of existing technologies while increasing reliability. The selected chip has richer functions, can adapt to more usage environments, has lower power consumption, and can better serve daily functional needs.
[0032] When the electromagnetic relays controlling the two doors malfunction, an abnormal electrical signal is transmitted to the protection circuit 4. At this time, the NCV2904 operational amplifier will transmit the abnormal signal back to the MCU chip 1 through AD conversion. The MCU chip 1 judges the signal and transmits it to the protection circuit 4 through the microcontroller pin, causing the NCE6050KA MOSFET to conduct and connect to ground, thereby interrupting the relay from continuing to work and preventing accidents from happening.
[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
Claims
1. A low-cost vehicle lock controller, characterized in that: The MCU chip (1) is connected to a relay control module (2) at its output terminal, a power supply chip (3) at its input terminal, and an antenna receiving module (5) and a protection circuit (4) at its connection terminal. The MCU chip (1) is used to receive and process electrical signals and to control the relay control module (2); The relay control module (2) includes three electromagnetic relays and transistors. The relay control module (2) is used to control the vehicle lights and the door switches on the left and right sides. The power chip (3) is used to reduce the 24V voltage input obtained from the internal circuit of the car to 5V output to power the MCU chip (1) and the antenna receiving module (5); The protection circuit (4) is used to transmit the abnormal signal to the MCU chip (1) through AD conversion and connect it to ground to interrupt the relay operation; The antenna receiving module (5) is used to receive external signals and convert the received signals into electrical signals, which are then input to the MCU chip (1).
2. The low-cost vehicle lock controller according to claim 1, characterized in that: The MCU chip (1) is a PY32F002BF15P6 microcontroller with a 32-bit ARM® Cortex® - M0+ core and a TSSOP20 package.
3. The low-cost vehicle lock controller according to claim 1, characterized in that: The relay control module (2) is specifically used to control the vehicle lights through one electromagnetic relay and to control the opening and closing of the left and right doors through two other electromagnetic relays.
4. A low-cost vehicle lock controller according to claim 1, characterized in that: The transistor is connected to one terminal of the electromagnetic relay, and the electromagnetic relay is connected to the internal circuitry of the vehicle.
5. A low-cost vehicle lock controller according to claim 1, characterized in that: The power chip (3) is model number LM78L05.
6. A low-cost vehicle lock controller according to claim 1, characterized in that: The protection circuit (4) is specifically used to transmit the abnormal signal to the MCU chip (1) through the AD conversion of the NCV2904 operational amplifier. The MCU chip (1) judges and transmits the signal to the protection circuit (4) through the microcontroller pin, so that the MOS tube is turned on and connected to ground, and the relay is interrupted.
7. A low-cost vehicle lock controller according to claim 1, characterized in that: The antenna receiving module (5) is specifically used to receive external signals through the BC2502 signal receiver, and convert the received signals into electrical signals and input them to the MCU chip (1).
8. A low-cost vehicle lock controller according to claim 1, characterized in that: The communication protocol between the antenna receiving module (5) and the MCU chip (1) is set to the I2C protocol.