CN216013993U - Navigation data source switcher - Google Patents

Abstract

The utility model provides a navigation data source switcher, which comprises a core control module, a man-machine interaction module and a power supply module, wherein the core control module is used for controlling and processing external three-path positioning data; the man-machine interaction module is used for completing the information interaction function between the switcher and the user; the power supply module is used for providing power supply voltage for the work of the switcher; the man-machine interaction module comprises a display screen, four keys and a channel selection switch, wherein the display screen is used for displaying result data after the control processing of the core control module; the four keys are used for completing the switching and operation of different interfaces of the display screen; the channel selection switch is used for detecting and selecting the credible data channel. The utility model discloses a multichannel design, wide range baud rate match design and button tectorial membrane design improve product application scope, product waterproof performance and robustness, have practiced thrift the cost in extensive use.

Description

Navigation data source switcher

Technical Field

The utility model relates to a shipborne navigation monitor terminal belongs to the electronic equipment field, especially relates to a navigation data source switch.

Background

The Global Positioning System (GPS) is an autonomous and controllable positioning service system in the united states, although GPS signals cover the world, in some regions, signal deception means may be added at any time in the united states to cause signal failure in local regions of the GPS, so that if only a GPS navigation positioning terminal is installed on a ship for shipping in the region, the ship loses the correct course, thereby causing serious consequences.

The Beidou satellite navigation system (BDS) in China realizes globalization at present, starts a new industrialized journey, and supports gradual marketization of the Beidou positioning terminal of the Beidou global signal. Beidou positioning is an autonomous controllable satellite positioning technology in China, and at present, the installation of a Beidou positioning terminal on a marine shipping ship is very urgent, and in addition, other positioning terminals of global satellite navigation systems (Russian Glonass system and European Galileo system) are added, so that navigation data source switching equipment is needed, the positioning data of various different navigation positioning terminals are compared, abnormal alarm is carried out on the positioning data exceeding the positioning error threshold range, and the situation that the ship deviates course according to invalid positioning data during navigation is avoided.

At present, navigation data source switching equipment on the market mostly only supports two-way data source switching, has a small screen and a small baud rate matching range, does not have the large screen, is visual and efficient, cannot meet the requirements of various positioning terminals with different baud rates, and is deficient in waterproof performance and man-machine interaction function.

Therefore, there is a need for further improvements to the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a navigation data source switch can solve current switch and only support two way data source to switch, and the screen is less, baud rate match range is less, does not possess the demand that the audio-visual high efficiency of large screen and unable adaptation have the multiple location terminal of different baud rates to waterproof performance and the technical problem that the human-computer interaction function is short of.

The utility model provides a navigation data source switcher, which comprises a core control module, a man-machine interaction module and a power supply module, wherein the core control module is used for carrying out flow control on the switcher and carrying out data processing on three paths of positioning data input from the outside; the man-machine interaction module is used for completing the information interaction function between the switcher and the user; the power supply module comprises a power supply component and a peripheral circuit thereof and is used for providing power supply voltage for the work of the switcher; wherein the content of the first and second substances,

the human-computer interaction module comprises a display screen, four keys and a channel selection switch, wherein the display screen is used for displaying a data result after the control processing of the core control module; the four keys are used for completing the switching and operation of different interfaces of the display screen; the channel selection switch is used for detecting and selecting the credible data channel.

The man-machine interaction module is arranged on an upper cover of the switcher shell, the display screen is arranged in the middle of the upper cover, the channel selection switch is arranged on the right side of the display screen, and the four keys are arranged below the display screen.

Preferably, the power supply module includes an external power input connection terminal, a power switch, a power protection unit and a switching voltage regulator, which are sequentially arranged, the external power input connection terminal is used for accessing an external power supply, the power switch is used for switching a switcher power supply, the power protection unit is used for protecting a switcher circuit processing board, and the switching voltage regulator is used for converting a 12V direct current voltage inside the switcher into a 5V direct current voltage.

Preferably, an internal power output connection terminal is arranged between the power protection unit and the switching voltage regulator, and the internal power output connection terminal is directly output to the outside through a power output interface and can be used for providing power for an external navigation terminal.

Preferably, the switching voltage regulator is followed by an LDO low dropout linear regulator for converting the internal supply voltage from a 5V dc voltage to a 3.3V dc voltage.

Preferably, the human-computer interaction module further comprises an indicator light and a buzzer, the indicator light and the buzzer are connected with the core control module, and the indicator light is arranged on the left side of the display screen.

Preferably, the four keys comprise a menu key, a confirmation key, an upturning key and a downturning key which are sequentially arranged from left to right, and the menu key, the confirmation key, the upturning key and the downturning key are physical film keys;

wherein the content of the first and second substances,

the menu key is used for completing the switching operation of different interfaces of the display screen;

the up-turning key and the down-turning key are used for completing up-and-down turning operation when the threshold value in the interface is set;

the confirmation key is used for completing the confirmation action after the operation;

the four keys and the display screen are covered by unified film stickers.

Preferably, the channel selection switch comprises a switch knob cap, a band switch and a channel selection adapter plate which are arranged in sequence from top to bottom;

the switch comprises a switcher and is characterized in that a mounting bottom plate is fixed to the bottom of the inner side of the switcher, a core plate is fixedly arranged on the mounting bottom plate, a core control module is arranged on the core plate, and a channel detection interface terminal and a data switching interface terminal which are communicated with the core control module, and a data output interface terminal and a three-way data input interface terminal which are connected with an aviation plug connector are arranged below a channel selection adapter plate.

Preferably, the core board is provided with three level conversion units, and is configured to convert externally input positioning data of three RS-422 levels into positioning data of TTL levels, respectively, so that the core control module connected to the level conversion units can directly process data.

Preferably, the core control module is an MCU core processor, and the MCU core processor is an STM31F407VGT6 high performance processor with multiple GPIO ports and UART interfaces.

Preferably, the power switch is a light-touch non-protruding metal button switch.

Preferably, the installation bottom plate is made of SUS304, and the core plate is made of PCBA.

Preferably, the upper cover and the housing form a cuboid switcher.

Preferably, the upper cover and the shell of the switcher are made of ADC12 aluminum alloy.

The utility model discloses following beneficial effect has:

1. the utility model discloses a navigation data source switch adopts the three channel design, enlarge the screen to 3.5 cun sizes under the condition of guaranteeing the equipment size limit value, add the self-adaptation matching of wide range baud rate and manual setting interface and the manual interface that sets up of positioning error threshold value when the design, the screen below is equipped with four physics film buttons, the user passes through physics film button and color LCD liquid crystal display, can match the navigation positioning terminal that has different baud rates value in a flexible way, the product use flexibility has been improved, the human-computer interaction function has been optimized, expanded the utility model discloses an application scope can practice thrift the cost in extensive use.

2. The utility model discloses a four physics film button and color LCD liquid crystal display adopt unified tectorial membrane design, and switch adopts non-outstanding design, has improved waterproof performance and has reached the effect that the prevention was touched by mistake.

3. The utility model discloses an add power protection unit among the power module, can effectively prolong product life.

4. The utility model discloses design internal power source output interface in power module, can be for the power supply of external terminal, simple structure practices thrift the cost.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only used for explaining the concept of the present invention.

FIG. 1 is a schematic diagram of the overall frame of the present invention;

FIG. 2 is a top view of the structure of the present invention;

FIG. 3 is a front sectional view of the present invention;

FIG. 4 is a right side sectional view of the present invention;

FIG. 5 is a side view of the channel selection switch of the present invention;

FIG. 6 is a top view of the channel selection switch of the present invention;

FIG. 7 is a general design diagram of the single board power supply of the present invention;

fig. 8 is a schematic diagram of the protection circuit of the present invention.

Summary of reference numerals:

1. casing 2, upper cover 3, mounting plate

4. M bolt 5, nuclear core plate 6, copper insulated column

7. Bolt 8, key board 9 and indicator light

10. Waveband switch 11, switch knob cap 12, 9PIN navigation plug connector

13. Bolt 14, film sticker 15, display screen

16. 2PIN aviation plug connector 16-1, data output aviation plug interface

16-2, power output aviation interface 17, screw 18, physical film key

18-1, menu key 18-2, confirm key 18-3, and flip-up key

18-4, a down-turning key 19, a power switch 20 and a channel selection adapter plate

21. Data output interface terminal 22, channel detection interface terminal 23, data interface terminal

23-1, data transfer interface terminal 23-2, three-way data input interface terminal

24. Internal power supply output terminal 25 and power supply protection unit

26. Switching voltage regulator 27, LDO low dropout regulator

28. Level conversion unit 29 and MCU core processor

30. Ground terminal 31, external power supply

32. External power input connecting terminal

Detailed Description

Hereinafter, an embodiment of a navigation data source switcher of the present invention will be described with reference to the drawings.

The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include any obvious replacement or modification of the embodiments described herein.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It is noted that, in order to facilitate a clear presentation of the structure of the parts of the embodiments of the invention, the drawings are not necessarily drawn to the same scale. The same or similar reference numerals are used to denote the same or similar parts.

As shown in fig. 1 and 2, the utility model provides a navigation data source switcher, which comprises a core control module, a man-machine interaction module and a power supply module, wherein the core control module is used for carrying out flow control on the switcher and carrying out data processing on three paths of positioning data input from the outside; the man-machine interaction module is used for completing the information interaction function between the switcher and the user; the power supply module comprises a power supply component and a peripheral circuit thereof and is used for providing power supply voltage for the work of the switcher. Wherein the content of the first and second substances,

the man-machine interaction module comprises a display screen 15, four physical film keys 18 and a channel selection switch, wherein the display screen 15 is used for displaying a data result after control processing of the core control module; the four physical film keys 18 are used for completing the switching and operation of different interfaces of the display screen 15; the channel selection switch is used for detecting and selecting the credible data channel.

The man-machine interaction module is arranged on the upper cover 2 of the switcher shell 1, the display screen 15 is arranged in the middle of the upper cover 2, the channel selection switch is arranged on the right side of the display screen 15, and the four physical film keys 18 are arranged below the display screen 15.

The utility model discloses a navigation data source switch adopts the three channel design, can switch over three channel navigation data sources fast in real time, and enlarge display screen 15 to 3.5 cun size under the condition of guaranteeing the equipment size limit value, add the self-adaptation matching of wide range baud rate and manual interface and the manual interface that sets up of positioning error threshold value when the design, 15 below of display screen are provided with four physics film button 18, the user passes through physics film button 18 and color LCD liquid crystal display 15, can match the navigation positioning terminal that has different baud rates in a flexible way, the product use flexibility has been improved, the human-computer interaction function has been optimized, the utility model discloses an application scope, can practice thrift the cost in extensive use.

The utility model discloses a four physics film button 18 and colored LCD liquid crystal display 15 adopt unified tectorial membrane design, and switch 19 adopts to dabble non-outstanding metal button switch, for non-outstanding design, has improved the waterproof performance of equipment and has reached the effect that the prevention touched by mistake.

As shown in fig. 3 to 6, the channel selection switch includes a switch knob cap 11, a band switch 10, and a channel selection adapter plate 20, which are sequentially arranged from top to bottom. The bottom of the inner side of the switcher is fixedly provided with a mounting bottom plate 3, the mounting bottom plate 3 is fixedly provided with a core plate 5, the core plate 5 is provided with a core control module, and a channel detection interface terminal 22 and a data switching interface terminal 23-1 which are communicated with the core control module, a data output interface terminal 21 and a three-way data input interface terminal 23-2 which are connected with the aviation plug connector are arranged below the channel selection adapter plate 20.

Preferably, the human-computer interaction module further comprises an indicator light 9 and a buzzer, and the indicator light 9 and the buzzer are connected with the MCU core processor 29 to support the acousto-optic alarm function. The indicator light is arranged on the left side of the display screen 15. The indicator light 15 is a red-green double-color indicator light, and the display screen 15 is an LCD screen.

As shown in fig. 7, the power supply module includes an external power input connection terminal 32, a power switch 19, a power protection unit 25, and a switching voltage regulator 26, which are sequentially disposed, the external power input connection terminal 32 is used for connecting to an external power 31, the external power 31 is provided with a ground terminal 30, the power switch 19 is used for switching a switcher power supply, the power protection unit 25 is used for protecting the circuit processing board, and the switching voltage regulator 26 is used for converting an internal 12V dc voltage into a 5V dc voltage. An internal power output terminal 24 is arranged behind the power protection unit 25 and in front of the switching voltage regulator 26, and the internal power output terminal 24 is directly output to the outside through the power output aviation plug interface 16-2 and can provide power for an external navigation terminal. Preferably, the switching voltage regulator 26 is followed by an LDO low dropout linear regulator 27 for converting the internal supply voltage from 5V dc voltage to 3.3V dc voltage.

As shown in fig. 8, in order to make the processing board of the switcher power supply module have a wide voltage input, have overcurrent, overload, overvoltage, protection against cascade connection, and a safer protection measure to prevent the processing board from being damaged in an abnormal situation, a protection circuit is added to protect the processing board. In order to limit the abnormal and abnormal operation of the processing board caused by the overlarge current, a fuse is added on the processing board, the rated current of the fuse is 3A, and the fuse can be melted and disconnected as long as the current of the processing board exceeds the rated value, so that the circuit can be protected. The overvoltage protection tube is added to prevent the power chip from being damaged due to the fact that the fluctuation of input voltage exceeds a certain value, so that the power chip cannot provide power, the processing board cannot work normally, when the input voltage exceeds the threshold value of the protection tube, the overvoltage protection tube is conducted to protect a device from being damaged, if the input voltage is large, the overvoltage protection tube is directly damaged, the fuse tube can play a role at the moment, the fuse tube is prevented from being damaged due to the fact that current is too large, and therefore the whole processing board is protected. In order to increase the reliability of the processing board, an anti-reverse connection circuit is added at the power polarity position, the PMOS tube used here can be normally conducted when the PMOS tube is normally connected, the processing board normally works, and when the power polarity is reversely connected, the PMOS tube is in a closed state because the control end state of the PMOS tube is a high level, so that the damage of the processing board caused by the reverse connection of the power polarity is avoided.

Considering that the input voltage range of the processing board is 9-32V/DC and the rated voltage is 24VDC, in order to be compatible with a larger input range, the switching voltage regulator 26 selects a DC-DC conversion chip LM2596X-5.0 with a wide input voltage range, the maximum input voltage of the chip is 45V/DC, the output voltage is 5V/DC, the maximum output current is 3A, the high-efficiency voltage stabilizing circuit has a perfect protection circuit, a current limit circuit, a thermal shutdown circuit and the like, and the high-efficiency voltage stabilizing circuit can be formed by using the device with few peripheral devices, so that the peripheral devices are greatly reduced, the size of the processing board is reduced, the development cost is reduced, and the design efficiency is improved.

The utility model discloses a core control module is MCU core processor 29, adopts the model of being produced by the meaning semiconductor company to be STM32F407VGT6 high performance processor, and this model processor has high performance, low-power consumption, low-cost, the strong characteristics of scalability, the development of being convenient for, and development cycle is short, uses extensively. The processor is provided with a 1M Flash memory, and the memory is used for storing codes and picture data displayed on a screen, so that the use of an external memory is reduced, the size of a processing board is reduced, and the cost is saved. Meanwhile, the MCU core processor 29 has rich GPIO ports and up to 6 UART interfaces, thereby improving the data interaction capability of the processor and the computer. Specifically, the STM32F407VGT6 processor has four key detection pins, an SPI interface pin of the display screen 15 of the same kind, a buzzer pin, a red and green double-color indicator lamp pin of the same kind, an LCD liquid crystal display interface pin of the same kind, a three-way positioning data channel detection pin, a three-way level conversion interface pin, a UART interface, and other ground pins and reserved pins, for completing function control and data processing of the switcher. The UART is set as a differential wire, and the wire impedance is set as 100 omega.

The operating voltage of the MCU core processor 29 is 3.3V dc voltage, but most power adapters in the market today convert 220V ac voltage to 12V dc voltage, so we need to access a voltage regulator converting 12V dc voltage to 3.3V dc voltage. Considering that the operating voltage of the RS-422 level-to-TTL level conversion unit 28 is 5V dc voltage, for the integrity and consistency of circuit design, firstly a switching voltage regulator is used to convert 12V dc voltage into 5V dc voltage, one path supplies power to the level conversion chip, and the other path uses the LDO low dropout linear regulator 27 to convert 5V dc voltage into 3.3V dc voltage and supplies power to the MCU core processor 29.

Preferably, the MCU core processor 29 has certain requirements on the magnitude of the power supply ripple, and therefore, the LDO low dropout linear regulator 27 with a small ripple, a low price, and a wide application range, which is model number AMS1117-3.3V, is selected. After being processed by the LDO low dropout regulator 27, the internal power supply voltage is converted from 5V dc voltage to stable 3.3V dc voltage to supply power to the MCU core processor 29.

As shown in fig. 1, the positioning data of the three RS-422 levels inputted from the outside is converted into TTL levels by the three RS-422 to TTL level conversion unit 28, and the TTL level data is directly processed by the MCU core processor 29 and the result data is displayed on the LCD.

Preferably, the LCD screen 15 is driven by STM32F030C8T6, is designed to be a 3.5-inch large screen, has high resolution and clear handwriting, and adopts RGB vertical strip pixel layout and interface color display.

Preferably, the level conversion unit 28 on the core board 5 selects a low power consumption transceiver with a model of MAX490ESA, is compatible with RS-485 and RS-422 levels, and converts externally input positioning data of three paths of RS-422 levels into positioning data of TTL levels through the three MAX490ESA level conversion units 28, so that the MCU core processor 29 can directly process the data.

As shown in fig. 2-4, the navigation data source switch of the present invention includes a housing 1 and an upper cover 2, wherein the upper cover 2 is fixedly disposed on the housing 1. A display screen 15, a power switch 19, an indicator light 9, a channel selection switch and four keys are arranged above the upper cover 2, three aviation plug connectors are arranged on the side face of the shell and are used for data input and power input, data output and power output, the display screen 15 is arranged in the middle of the upper cover 2, the power switch 19 and the indicator light 9 are arranged on the left side of the display screen 15, the channel selection switch is arranged on the right side of the display screen 15, and the four physical film keys 18 are arranged below the display screen 15; the fixed mounting plate 3 that is provided with in the inside bottom surface of casing 1, fixed being provided with core plate 5 on mounting plate 3, one side is provided with four copper insulated columns 6 on core plate 5, and four copper insulated columns 6 go up the fixed keypad 8 that is provided with, are provided with four physics film buttons 18 on the keypad 8 for man-machine interaction operation.

The four copper isolation columns 6 are arranged on one side of the core board 5 corresponding to the key board 8, are not attached to the four side faces of the shell 1, and are left with gaps.

In the utility model discloses a further embodiment, upper cover 2 and casing 1 form the cuboid switch that length is 187.5mm, width is 120mm and height is 77.5mm, and the casing 1 and the upper cover 2 of this switch adopt ADC12 aluminum alloy material. The upper cover 2 is fixed to the housing 1 by four M4 spider head screws 17.

As shown in figure 2, the power switch 19 is arranged at the upper part of the left side of the upper cover 2 and is a light-touch non-protruding metal button switch, the indicator light 9 is arranged at the lower part of the left side of the upper cover 2 and is an LED red-green double-color metal indicator light, and the connecting line of the central point of the power switch 19 and the central point of the indicator light 9 is vertical to the longest side of the shell.

As shown in fig. 2 and 3, the four physical film keys 18 include a menu key 18-1, a confirmation key 18-2, an up key 18-3 and a down key 18-4, which are sequentially arranged from left to right, and the menu key 18-1, the confirmation key 18-2, the up key 18-3 and the down key 18-4 are arranged as the physical film keys 18. The menu key 18-1 is used for completing switching operation of different interfaces; the up-turning key 18-3 and the down-turning key 18-4 are used for completing up-and-down turning operation when the threshold value in the interface is set; the confirmation key 18-2 is used for confirmation after completion of the above operation. Four physical film keys 18 are arranged below the middle screen of the upper cover 2 and covered with the liquid crystal display screen 15 by the uniform film paster 14.

As shown in fig. 2 to 6, the passage selection switch is provided on the right side of the upper cover 2 with its center point between the power switch 19 and the indicator lamp 9 corresponding to the left side. The channel selection switch includes a switch knob cap 11, a band switch 10, and a channel selection adapter plate 20. The utility model discloses the passageway select switch who sets up adopts band switch 10, band switch 10 upper end installation switch knob cap 11, band switch 10 lower extreme welding passageway selection keysets 20. The core board 5 is provided with an MCU core processor 29, and the channel selection adapter board 20 is provided with a channel detection interface terminal 22 and a data adapter interface terminal 23-1 which are communicated with the MCU core processor 29, and a data output interface terminal 21 and a three-way data input interface terminal 23-2 which are connected to the aviation plug connector, below.

As shown in fig. 2 and 3, three aviation plug connectors are provided on the rear side of the navigation data switch, and all three aviation plug connectors adopt aviation plugs with waterproof performance. Correspondingly, the rear side of the housing 1 is provided with three aviation plug connector jacks. One of the navigation plug connectors 12 adopts a 9PIN navigation plug connector as a data input interface, supports 3-path data input simultaneously, and is accessed by a power supply input interface. The other two adopt 2PIN aviation plug connectors 16, the data output interface is arranged in the middle of the rear side surface, the power output interface is arranged on the left side of the rear side surface, namely, one aviation plug connector 16-1 is used as the data output interface and supports one path of data output, and the other aviation plug connector 16-2 is used as the power output interface and supports the output of an internal power supply to the outside. The three navigation plug connectors are all fixed on the rear side of the navigation data switcher by four M3 cross-recessed pan head three-combination bolts 13.

Preferably, four physical key pins are provided on the keypad 8, and the four physical key pins are connected with four key detection pins on the MCU core processor 29. And a gap is reserved between the key board 8 and the shell 1 and between the key board and the upper cover 2, and the key board is not attached. The key sheet 8 is welded with four physical film keys 18, and the four physical film keys 18 penetrate through the upper cover 2 and extend to the outside of the upper cover 2.

As shown in fig. 3 and 4, the mounting base plate 3 is made of SUS304 and is rectangular, four M3 cross-recessed hexagon head triple combination bolts 4 are fixed on the inner bottom surface of the casing 1, the core plate 5, i.e., a PCBA plate, is rectangular, four M3 cross-recessed pan head triple combination bolts 7 are fixed on the mounting base plate 3, four copper isolation columns 6 are fixed on one side of the long side of the core plate 5 and are used for supporting the key board 8, the key board 8 is relatively narrow rectangular and is a PCBA plate, the four M3 cross-recessed pan head triple combination bolts 7 are fixed on the copper isolation columns 6, and four physical film keys 18 are arranged on the key board 8 and are used for man-machine interaction operation.

The area of the core plate 5 is smaller than that of the mounting base plate 3, a gap is reserved between the core plate 5 and the mounting base plate 3, and the gap between the core plate 5 and the four side faces of the shell 1 is not attached. Meanwhile, a gap is reserved between the mounting bottom plate 3 and the bottom surface inside the shell 1, and the mounting bottom plate 3 and the four side surfaces of the shell 1 are not attached to each other.

Specifically, the utility model discloses a navigation data source switch theory of operation as follows:

when the navigation data source switcher works, a power supply is switched on through a 9PIN navigation plug connector 12, a power switch 19 is pressed, an indicator light 9 is displayed to be green and not to flicker, a display screen 15 displays default information of a main interface, three or two paths of navigation data are accessed as input data through the other end of an interface cable connected with the 9PIN navigation plug connector 12, a menu key 18-1 is pressed, the interface is switched to an inter-channel distance error threshold value setting interface, the threshold value is set through an up-turning key 18-3 and a down-turning key 18-4, the menu key 18-1 is pressed again, the interface is switched to a channel 1 baud rate selection matching interface, then the menu key 18-1 is pressed again, the interface is switched to a channel 2 baud rate selection matching interface, then the menu key 18-1 is pressed again, the interface is switched to a channel 3 baud rate selection matching interface, and at each channel baud rate matching interface, the baud rate of the external input data terminal can be automatically or manually matched through the up-turning key 18-3 and the down-turning key 18-4, the confirmation key 18-2 is pressed, the interface returns to the main interface, the down-turning key 18-4 can be pressed at any time in the working process of the device to be switched to a distance error display interface, the distance errors among the three channels are clearly compared, and if the distance errors exceed a set threshold value, the indicator light 9 is changed from green to red and continuously flickers.

The above description is directed to an embodiment of a navigation data source switch of the present invention. Specific features such as shape, size and position of a navigation data source switch of the present invention can be specifically designed according to the function of the above disclosed features, and the design can be realized by those skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the present invention to achieve the purpose of the present invention.

Claims (10)

1. A navigation data source switcher is characterized by comprising a core control module, a man-machine interaction module and a power supply module, wherein the core control module is used for carrying out flow control on the switcher and carrying out data processing on three paths of externally input positioning data; the man-machine interaction module is used for completing the information interaction function between the switcher and the user; the power supply module comprises a power supply component and a peripheral circuit thereof and is used for providing power supply voltage for the work of the switcher; wherein the content of the first and second substances,

the human-computer interaction module comprises a display screen, four keys and a channel selection switch, wherein the display screen is used for displaying a data result after the control processing of the core control module; the four keys are used for completing the switching and operation of different interfaces of the display screen; the channel selection switch is used for detecting and selecting a credible data channel;

the man-machine interaction module is arranged on an upper cover of the switcher shell, the display screen is arranged in the middle of the upper cover, the channel selection switch is arranged on the right side of the display screen, and the four keys are arranged below the display screen.

2. The navigation data source switcher of claim 1, wherein the power supply module includes an external power input connection terminal for connecting to an external power supply, a power switch for switching the switcher power supply, a power protection unit for protecting the switcher circuit processing board, and a switching voltage regulator for converting an internal 12V dc voltage of the switcher to a 5V dc voltage, which are arranged in this order.

3. The navigation data source switcher of claim 2, wherein an internal power output connection terminal is provided between the power protection unit and the switching voltage regulator, and the internal power output connection terminal is directly output to the outside through a power output interface and can be used for supplying power to an external navigation terminal.

4. The navigation data source switcher of claim 2, wherein the switching voltage regulator is followed by an LDO low dropout linear regulator for converting an internal supply voltage from a 5V dc voltage to a 3.3V dc voltage.

5. The navigation data source switcher of claim 1, wherein the human-machine interaction module further comprises an indicator light and a buzzer, the indicator light and the buzzer are connected with the core control module, and the indicator light is arranged on the left side of the display screen.

6. The navigation data source switcher of claim 1, wherein the four keys include a menu key, a confirmation key, an up-flip key and a down-flip key arranged in sequence from left to right, the menu key, the confirmation key, the up-flip key and the down-flip key being arranged as physical membrane keys; wherein the content of the first and second substances,

the menu key is used for completing the switching and operation of different interfaces of the display screen;

the up-turning key and the down-turning key are used for completing up-and-down turning operation when the threshold value in the interface is set;

the confirmation key is used for completing the confirmation action after the operation;

the four keys and the display screen are covered by unified film stickers.

7. The navigation data source switcher of claim 1, wherein the channel selection switch comprises a switch knob cap, a band switch and a channel selection adapter plate arranged in sequence from top to bottom;

the switch comprises a switcher and is characterized in that a mounting bottom plate is fixed to the bottom of the inner side of the switcher, a core plate is fixedly arranged on the mounting bottom plate, a core control module is arranged on the core plate, and a channel detection interface terminal and a data switching interface terminal which are communicated with the core control module, and a data output interface terminal and a three-way data input interface terminal which are connected with an aviation plug connector are arranged below a channel selection adapter plate.

8. The navigation data source switch of claim 7, wherein three level conversion units are disposed on the core board for converting externally inputted three paths of RS-422 level positioning data into TTL level positioning data respectively, so as to facilitate the core control module connected to the level conversion units to directly process data.

9. The navigation data source switcher of claim 1, wherein the core control module is an MCU core processor, and the MCU core processor is an STM31F407VGT6 high performance processor with a plurality of GPIO ports and UART interfaces.

10. The navigation data source switcher of claim 2 wherein the power switch is a light touch non-protruding metal button switch.

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