15-type optical fiber compass interface board based on ARM (Advanced RISC Machines)

Abstract

The utility model discloses an ARM-based 15-type optical fiber compass interface board, and relates to the technical field of marine optical fiber compass navigation. The interface circuit board is installed on the back face of the interface panel and fixed to the interface panel through the copper column and the connector, the indicator lamp is located on the interface circuit board, aligned with an opening of the interface indicator lamp and embedded into the interface indicator lamp, the connector is welded to the interface circuit board, and the connector is laterally embedded into the interface panel and fixed through the screw and the waterproof pad. According to the utility model, the interconversion between the IMU protocol of the optical fiber compass and the interface standard (IEC61162-1 / 2) of the marine optical fiber compass is realized, the interface function of the optical fiber compass is shared, the reliability and the stability of the optical fiber compass are improved, the interface conversion circuit based on ADUM1201 and MAX488 chips adopts dual-power isolation, a transient suppressor and over-current protection, and the reliability and the stability of the optical fiber compass are improved. The reliability of the interface is improved, and the interface board fault caused by the fault of one interface is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of marine optical fiber compass navigation technology, and particularly relates to a 15 type optical fiber compass interface board based on ARM. BACKGROUND

[0002] The optical fiber compass is a strapdown gyrocompass based on the fiber-optic gyroscope, and provides the ship with heading angle, heading angle speed, attitude angle, heave and other information in the ship's navigation system. Gyrocompasses have developed from electrically controlled gyrocompasses (referred to as electric compasses) to three-axis platform compasses, and then to strapdown gyrocompasses; gyroscopes have developed from high-speed rotating mechanical gyroscopes to optical gyroscopes without rotating parts; the fiber-optic gyroscope has developed rapidly in the past decade or so because its technical threshold is relatively low compared with that of the laser gyroscope. The optical fiber compass has a trend of replacing the traditional electric compass.

[0003] The optical fiber compass interface board is used for transmitting various navigation information and control commands of the optical fiber compass system according to certain rules and standards. It is the communication bridge between the optical fiber compass IMU and the ship's navigation system, and is the link between the crew and the optical fiber compass system. However, the existing optical fiber compass needs to be connected through the interface board when communicating with the ship, but the existing interface board CONTENT OF THE UTILITY MODEL

[0004] To solve the problems mentioned in the background, the utility model aims to provide a 15 type optical fiber compass interface board based on ARM.

[0005] The 15 type optical fiber compass interface board based on ARM of the utility model, including interface panel, interface circuit board, interface indicating lamp, connector and fixed screw, interface circuit board installs in interface panel back, is fixed with interface panel through copper column and connector, indicating lamp is located on interface circuit board and is embedded in interface indicating lamp opening in alignment, connector is welded on interface circuit board, connector side is embedded to interface panel and is fixed through screw, waterproof pad.

[0006] As a preferred scheme: the interface panel is made of aluminum material and is processed by numerical control, surface anodization and white paint treatment.

[0007] As a preferred scheme: the interface circuit board includes a PCB board, a main processor and a minimum system, a 6-way interface conversion circuit, an isolation power supply and a filter protection circuit, two double-color indicating lamp circuits and an EEPROM storage circuit. The main processor is connected with the IMU through a 1-way interface circuit and is connected with the outside through a 5-way interface circuit. The main processor displays the current system state through the control of the two double-color indicating lamps.

[0008] As a preferred scheme: the model of the main processor is STM32F407VGT6.

[0009] As a preferred scheme: the 6-way interface conversion circuit adopts ADUM1201 and MAX488 chips and TVS and other protection devices.

[0010] As a preferred scheme: the EEPROM circuit adopts AT24C04 chip.

[0011] As a preferred scheme: the dual-color indicating lamp adopts red and green LEDs and can generate yellow light.

[0012] As a preferred scheme: the connector adopts waterproof aviation connectors, which are 2, 19 and 4 cores respectively, and the connectors are in contact with the interface panel through waterproof rubber pads to realize waterproof.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model realizes the mutual conversion of the interface standard (IEC61162-1 / 2) of the optical fiber compass IMU protocol and the marine optical fiber compass, shares the interface function of the optical fiber compass, and improves the reliability and stability of the optical fiber compass.

[0015] First, the utility model uses an ARM cortex-M4 core single-chip microcomputer with a low price and supporting floating-point operation and a main frequency of 168Mhz as a main control chip, uses a real-time operating system, and can achieve a stable and high real-time control unit.

[0016] Second, the utility model is based on the interface conversion circuit of ADUM1201 and MAX488 chips, adopts double-power isolation, transient suppressor and overcurrent protection, improves the reliability of the interface, and does not cause interface board failure due to one-way interface failure.

[0017] Third, the utility model is based on a dual-color LED indicating lamp, can generate yellow (orange yellow) light, and is compatible with the BAM alarm color requirement of IEC62923-1 / 2. DETAILED DESCRIPTION OF DRAWINGS

[0018] In order to facilitate the description, the utility model is described in detail by the following specific embodiments and drawings.

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 It is a circuit block diagram of the utility model;

[0021] Figure 3 It is an interface conversion circuit diagram in the utility model. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the present application more clear, the present application will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the present specification for understanding and reading by those skilled in the art, and are not intended to limit the conditions that can be implemented by the present application, so they do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0023] It should also be noted that, in order to avoid obscuring the present application due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0024] In combination with Figure 1 The present embodiment adopts the following technical scheme: an interface panel, an interface circuit board (located on the back of the interface panel), a status indicator light (Status), an external information status indicator light (GPS), a power connector (J1), a data connector (J2), an external information connector (J3), and a fixing screw. The interface panel is made of aluminum material and is processed by numerical control, anodized on the surface, and treated with white paint. The interface circuit board is installed on the back of the interface panel and is fixed with the interface panel through copper columns and connectors. The indicator light is located on the interface circuit board and is aligned with the indicator light opening of the interface panel and embedded therein. The connector is welded on the interface circuit board, and the connector is embedded into the interface panel and fixed by screws and waterproof pads. The interface circuit board includes a PCB board, a main processor and a minimum system, a 6-way interface conversion circuit, an isolated power supply and its filter protection circuit, two double-color indicator light circuits, and an EEPROM storage circuit. The model of the main control chip is STM32F407VGT6. The interface conversion circuit is composed of ADUM1201 and MAX488 chips and TVS protection devices. The double-color indicator light uses red and green LEDs and can generate yellow light. The connector uses a waterproof aviation connector with 2, 19, and 4 cores. The connector is in contact with the interface panel through a waterproof rubber pad to achieve waterproofing.

[0025] In combination with Figure 2The embodiment is described as follows: an interface circuit is composed of an MCU based on ARM cortex-M4, protection devices such as ADUM1201 and MAX488 chips and TVS, a storage medium based on EEPROM, and a double-color indicator lamp based on red and green LEDs and capable of generating yellow light.

[0026] In combination Figure 3 The embodiment is described as follows: the interface conversion circuit uses ADUM1201 chips to realize isolation between the MCU end and the external communication end, uses MAX488 chips to realize mutual conversion between TTL level and differential level, and uses a transient suppression and overcurrent protection circuit composed of TVS and MSM020.

[0027] The embodiment is an important component of the fiber compass. First, the fiber compass IMU sends IMU data (binary data) to the interface board through a serial communication interface, the interface board generates ship navigation information such as heading angle, heading angle speed, and attitude angle according to the IEC61162 standard, and outputs the information to other navigation devices of the ship through OUT1-UOT4 serial interfaces; at the same time, the interface board receives position and speed information of the satellite navigation and the log of the IEC61162 standard, and parses the information into IMU binary data, and sends the data to the IMU through the IMU interface. The IMU performs algorithm compensation through the information to improve the navigation accuracy of the fiber compass. At the same time, the interface board parses the working state of the IMU and the state of the external information, and feeds back the information to the user such as the crew through the on-off rule of the two state lights.

[0028] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be included in the present application.

[0029] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. An ARM-based type 15 fiber optic gyro interface board, characterized by: The interface panel, the interface circuit board, the interface indicator, the connector and the fixing screw are included; the interface circuit board is installed on the back of the interface panel, fixed with the interface panel through the copper column and the connector, the indicator is located on the interface circuit board and is embedded in the interface indicator opening, the connector is welded on the interface circuit board, and the connector is embedded in the interface panel and fixed through the screw and the waterproof pad.

2. The ARM-based interface board for a 15- fiber fiber optic compass of claim 1, wherein: The interface panel is made of aluminum material, processed by numerical control, anodized on the surface and treated by white paint.

3. The ARM-based interface board for a 15- fiber fiber optic compass of claim 1, wherein: The connector is made of waterproof aviation connector, which is 2, 19 and 4 cores respectively, and the connector is contacted with the interface panel through the waterproof rubber pad to realize waterproof.

4. The ARM-based interface board for a 15- fiber fiber optic compass of claim 1, wherein: The interface circuit board includes the PCB board, the main processor and the minimum system, the 6-way interface conversion circuit, the isolation power supply and the filter protection circuit, two double-color indicator light circuits and the EEPROM storage circuit; the main processor is connected with the IMU through the 1-way interface circuit, connected with the outside through the 5-way interface circuit, and displays the current system state through the control of the two double-color indicator lights.

5. The ARM-based interface board for a 15- fiber fiber optic compass of claim 4, wherein: The model of the main processor is STM32F407VGT6.

6. The ARM-based interface board for a 15- fiber fiber optic compass of claim 4, wherein: The 6-way interface conversion circuit is composed of ADUM1201, MAX488 chip and TVS protection device.

7. The ARM-based interface board for a 15- fiber fiber optic compass of claim 4, wherein: The EEPROM storage circuit adopts AT24C04 chip.

8. The ARM-based interface board for a fiber optic gyro of type 15 according to claim 4, characterized in that: The double-color indicator light adopts red and green LED and can generate yellow light.

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