Marine optical fiber compass system control unit based on ARM

Abstract

The utility model discloses a marine optical fiber compass system control unit based on an ARM (Advanced RISC Machines), and relates to the technical field of signal data processing of marine optical fiber compasses. The shell is installed on the support, the membrane keyboard, the buzzer, the LED lamp and the LCD board are installed in a plurality of installation holes in the shell respectively, the mainboard is installed in the shell, the membrane keyboard is connected with the input end of the mainboard, the output end of the mainboard is connected with the buzzer and the LED lamp respectively, and the LCD board is connected with the input end and the output end of the mainboard. According to the utility model, the single-chip microcomputer with an ARM cortex-M4 kernel, which is low in price, supports floating point operation and has a dominant frequency of 168Mhz, is used as a main control chip, a real-time operating system, a control unit capable of achieving stability and high real-time performance and a matrix keyboard processing system based on BC7278 are used, interrupt receiving is adopted by the main control, the processing time of the main control chip is reduced, and the processing efficiency of the main control chip is improved. The key response speed is increased; and the man-machine interaction quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of marine fiber optic compass signal data processing technology, specifically relating to an ARM-based marine fiber optic compass system control unit. Background Technology

[0002] A fiber optic compass is a strapdown test gyrocompass based on a fiber optic gyroscope. In ship navigation and communication systems, it provides information such as heading angle, heading angular velocity, attitude angle, and heave. Gyrocompasses have evolved from electronically controlled gyrocompasses (ECAs) to three-axis platform compasses, and then to strapdown test compasses. Gyroscopes have evolved from high-speed rotating mechanical gyroscopes to optical gyroscopes without rotating parts. Fiber optic gyroscopes have seen rapid development in the last decade or so due to their relatively lower technological barrier compared to laser gyroscopes. Fiber optic compasses are trending towards replacing traditional ECAs.

[0003] The fiber optic compass system control unit is used to display various information about the fiber optic compass system, control its configuration parameters, select the compass signal source, and handle alarm interactions. It serves as the human-machine interface of the fiber optic compass system and the link between the crew and the system. With the increasing intelligence of ships, the requirements for reliability and safety are constantly rising. Control units with high reliability, operability, and readability are particularly important. However, existing marine fiber optic compass system control units are costly, have poor stability during operation, cannot achieve real-time control, and are prone to lag. Utility Model Content

[0004] To address the problems mentioned in the background section, the purpose of this invention is to provide an ARM-based control unit for a marine fiber optic compass system.

[0005] This utility model discloses a marine fiber optic compass system control unit based on ARM, comprising a housing, a bracket, a membrane keyboard, a buzzer, an LED light, a motherboard, and an LCD panel. The housing is mounted on the bracket, and the membrane keyboard, buzzer, LED light, and LCD panel are respectively installed in several mounting holes on the housing. The motherboard is installed inside the housing, the membrane keyboard is connected to the input terminal of the motherboard, the output terminal of the motherboard is connected to the buzzer and LED light respectively, and the LCD panel is connected to the input and output terminals of the motherboard.

[0006] As a preferred embodiment: the motherboard includes a main control chip, an LCD board interface, a keyboard control circuit, an LED control circuit, a buzzer control circuit, a data unit interface circuit, and a dual storage circuit for EEPROM and SD card. The main control chip is connected to the LCD board interface, the keyboard control circuit, the LED control circuit, the buzzer control circuit, the data unit interface circuit, and the dual storage circuit for EEPROM and SD card, respectively.

[0007] As a preferred option, the main control chip is an STM32F407VGT6.

[0008] As a preferred embodiment, the keyboard control circuit uses a BC7278 chip to acquire data from a 4×4 matrix keyboard.

[0009] As a preferred embodiment, the LCD driving circuit adopts a parallel port driving mode based on FSMC and uses PWM technology to adjust the backlight brightness.

[0010] As a preferred solution, the dual storage circuit of EEPROM and SD card provides redundant storage for important data with dual backups.

[0011] As a preferred embodiment, the LCD board includes an LCD power supply circuit, an LCD driving circuit, and an LCD screen. The LCD power supply circuit is connected to the LCD driving circuit, and the LCD driving circuit is connected to the LCD screen.

[0012] As a preferred embodiment, the LED light is a red and green dual-color LED light, integrated with an 8mm waterproof housing.

[0013] As a preferred embodiment, the buzzer is an active buzzer with an integrated φ22mm waterproof housing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] First, a low-cost ARM Cortex-M4 core microcontroller with a main frequency of up to 168MHz that supports floating-point operations is used as the main control chip. A real-time operating system is used to achieve a stable and highly real-time control unit.

[0016] II. The matrix keyboard processing system based on BC7278 adopts interrupt reception for the main control chip, which reduces the processing time of the main control chip, improves the key response speed, and enhances the quality of human-computer interaction.

[0017] Third, the TFTLCD based on FSMC parallel port control enables smooth display, fast response, and improved human-computer interaction quality.

[0018] Fourth, the dual storage mechanism of EEPROM and SD card ensures the security of critical data.

[0019] V. Content display interface compatible with IEC 62288 standard.

[0020] VI. BAM alarm human-machine interface compatible with IEC 62923-1 / 2. Attached Figure Description

[0021] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a circuit block diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the keyboard control circuit in this utility model.

[0025] Figure 4 This is a circuit diagram of the LCD driving circuit in this utility model;

[0026] Figure 5 This is a circuit diagram of dual storage circuit of EEPROM and SD card in this utility model.

[0027] In the picture: 1-outer shell; 2-stand; 3-membrane keyboard; 4-LCD screen; 5-buzzer; 6-LED light. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. The structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0029] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0030] Combination Figure 1 , Figure 2The following is a description of this specific embodiment, which adopts the following technical solution: It includes a housing 1, a bracket 2, a membrane keyboard 3, a buzzer 5, an LED light 6, a motherboard, and an LCD panel. The housing 1 is mounted on the bracket 2. The membrane keyboard 3, buzzer 5, LED light 6, and LCD panel are respectively installed in several mounting holes on the housing 1. The buzzer 5 is an active buzzer with an integrated φ22mm waterproof housing. The LED light 6 is a red and green dual-color LED with an integrated φ8mm waterproof housing. The motherboard is installed inside the housing 1. The membrane keyboard 3 is connected to the input terminal of the motherboard, and the output terminals of the motherboard are connected to the buzzer 5 and LED light 6 respectively. The LCD panel is connected to both the input and output terminals of the motherboard. The motherboard includes a main control chip, an LCD panel interface, a keyboard control circuit, an LED control circuit, a buzzer control circuit, and a data unit. The system includes an interface circuit, an EEPROM and SD card dual storage circuit, and a main control chip connected to the LCD board interface, keyboard control circuit, LED control circuit, buzzer control circuit, data unit interface circuit, and EEPROM and SD card dual storage circuit. The main control chip is an STM32F407VGT6. The keyboard control circuit uses a BC7278 chip to acquire data from a 4×4 matrix keyboard. The LCD driver circuit uses a parallel port drive mode based on FSMC and uses PWM technology to adjust the backlight brightness. The EEPROM and SD card dual storage circuit provides redundant dual backup storage for important data. The LCD board includes an LCD power supply circuit, an LCD driver circuit, and an LCD screen 4. The LCD power supply circuit is connected to the LCD driver circuit, and the LCD driver circuit is connected to the LCD screen 4.

[0031] Combination Figure 2 This specific implementation method adopts the following technical solution: including an ARM Cortex-M4 based MCU, a 3.2-inch TFT LCD controlled by FSMC parallel port, dual redundant storage media of EEPROM and SD card, data unit interface, and alarm execution mechanism (dual-color LED and buzzer);

[0032] Combination Figure 3 This specific implementation method adopts the following technical solution: The keyboard control circuit uses a BC7278 chip to control the matrix keyboard inversion and key detection. When a key is pressed, a level signal is generated and enters the MCU interrupt pin. After receiving the interrupt, the MCU reads the key information using SPI communication.

[0033] Combination Figure 4 This specific implementation adopts the following technical solution: the FSMC controller I / O port of the MCU in the LCD driving circuit is connected to the 16-bit parallel data port of the LCD, and the MCU controls the LCD display content as if writing to memory; the MCU controls the backlight brightness of the LCD by outputting a PWM pulse width signal to the TFT_BLK interface.

[0034] Combination Figure 5 This specific embodiment employs the following technical solution: the EEPROM in the dual storage circuit of EEPROM and SD card uses an HK24C32 chip, and the MCU uses an I... 2 The chip is read and written via the C bus; the SD card is read and written via SPI; key parameters such as configuration are stored with dual redundancy, and navigation recording data is saved on the SD card.

[0035] This specific implementation is an important component of the fiber optic compass system. First, the main fiber optic compass instrument, gyrocompass instrument, magnetic compass instrument, or satellite compass instrument sends ship navigation information such as heading angle, heading angular velocity, and attitude angle to the data unit via a serial communication interface. Simultaneously, the data unit receives information from satellite navigation and logs, and through configuration and control by the control unit, can forward position and speed information to the aforementioned main compasses. After configuration and control by the control unit, the data unit forwards ship navigation information to the user via serial and CANBUS. System configuration, information reading, and alarm interaction control are achieved through interaction between the control unit and the operator.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A control unit for a marine fiber optic compass system based on ARM, characterized in that: The application relates to a multifunctional LCD display device, which comprises a shell (1), a support (2), a membrane keyboard (3), a buzzer (5), an LED lamp (6), a mainboard and an LCD plate; the shell (1) is installed on the support (2), a plurality of mounting holes on the shell (1) are respectively provided with the membrane keyboard (3), the buzzer (5), the LED lamp (6) and the LCD plate, the mainboard is installed in the shell (1), the membrane keyboard (3) is connected with the input end of the mainboard, the output end of the mainboard is connected with the buzzer (5) and the LED lamp (6), and the LCD plate is connected with the input and output ends of the mainboard.

2. The ARM-based control unit for a marine fiber optic gyro system according to claim 1, wherein: The mainboard comprises a main control chip, an LCD plate interface, a keyboard control circuit, an LED control circuit, a buzzer control circuit, a data unit interface circuit and an EEPROM and SD card dual storage circuit, and the main control chip is connected with the LCD plate interface, the keyboard control circuit, the LED control circuit, the buzzer control circuit, the data unit interface circuit and the EEPROM and SD card dual storage circuit.

3. The ARM-based control unit for a marine fiber optic gyro system according to claim 2, wherein: The model of the main control chip is STM32F407VGT6.

4. The ARM-based control unit for a marine fiber optic gyro system according to claim 2, wherein: The keyboard control circuit adopts a BC7278 chip to collect a 4*4 matrix keyboard.

5. The ARM-based control unit for a fiber optic marine gyro system according to claim 2, wherein: The EEPROM and SD card dual storage circuit adopts double backup redundant storage for important data.

6. The ARM-based control unit for a fiber optic marine gyro system according to claim 1, wherein: The LCD plate comprises an LCD power supply circuit, an LCD driving circuit and an LCD liquid crystal screen (4), the LCD power supply circuit is connected with the LCD driving circuit, and the LCD driving circuit is connected with the LCD liquid crystal screen (4).

7. The ARM-based control unit for a fiber optic marine gyro system according to claim 6, wherein: The LCD driving circuit adopts an FSMC-based parallel port driving mode and uses a PWM technology to realize backlight brightness adjustment.

8. The ARM-based control unit for a fiber optic marine gyro system according to claim 1, wherein: The LED lamp (6) is a red and green dual-color LED lamp, which is integrated with a waterproof shell with a diameter of 8mm.

9. The ARM-based control unit for a fiber optic marine gyro system according to claim 1, wherein: The buzzer (5) is an active buzzer, which is integrated with a waterproof shell with a diameter of 22mm.

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