CN218679407U - Wearable big dipper three short message terminals - Google Patents

Wearable big dipper three short message terminals Download PDF

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CN218679407U
CN218679407U CN202222857016.7U CN202222857016U CN218679407U CN 218679407 U CN218679407 U CN 218679407U CN 202222857016 U CN202222857016 U CN 202222857016U CN 218679407 U CN218679407 U CN 218679407U
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module
short message
beidou
wearable
main control
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魏明阳
张承文
孙超
张丽
吴鸿斌
王庆
闫玉莎
徐玉玲
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Beidou Operation Service Center Of Sinopec Petroleum Engineering Geophysics Co ltd
China Petrochemical Corp
Sinopec Oilfield Service Corp
Sinopec Petroleum Engineering Geophysics Co Ltd
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Beidou Operation Service Center Of Sinopec Petroleum Engineering Geophysics Co ltd
China Petrochemical Corp
Sinopec Oilfield Service Corp
Sinopec Petroleum Engineering Geophysics Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The utility model discloses a wearable big dipper No. three short message terminals, it includes its characterized in that: main control module, RSMC module, RNSS module, display screen module, button collection module, bluetooth module and button, wherein: the RNSS module and the RSMC module are respectively connected with the main control module, a Beidou antenna is arranged between the RNSS module and the RSMC module, and a Beidou SIM card is placed in the RSMC module; a Bluetooth module is arranged in the main control module and is communicated with the smart phone based on Bluetooth; the main control module is provided with a key acquisition module and a display screen module, and human-computer interaction is realized based on the keys and the display screen. The utility model relates to a portable terminal, it is small, easy operation is fit for the field work personnel and wears the use.

Description

Wearable big dipper three short message terminals
Technical Field
The utility model relates to an electronic information technical field specifically is a hardware terminal that can carry out being connected with cell-phone APP based on No. three short messages of big dipper.
Background
At present, a plurality of Beidou short message terminals are available in the market, but the Beidou short message terminals are based on the Beidou No. 1 short message technology, so that the shortages exist in signal transmission frequency and capacity, and the data loss is easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that exists among the background art, a wearable big dipper No. three short message terminals have been proposed.
The technical scheme is as follows:
a wearable big dipper No. three short message terminal, it includes: main control module, RSMC module, RNSS module, display screen module, button collection module, bluetooth module and button, wherein: the RNSS module and the RSMC module are respectively connected with the main control module, a Beidou antenna is arranged between the RNSS module and the RSMC module, and a Beidou SIM card is placed in the RSMC module; a Bluetooth module is arranged in the main control module and is communicated with the smart phone based on Bluetooth; the main control module is provided with a key acquisition module and a display screen module, and human-computer interaction is realized based on the keys and the display screen.
Preferably, the RSMC module adopts a stamp sticker structure, and a low-noise amplifier, a filter, a radio frequency transceiver chip, a baseband chip and a 5W power amplifier are integrated in the RSMC module; the low-noise amplifier and the filter are used for filtering and amplifying weak analog signals; the radio frequency transceiver chip down-converts the amplified S frequency point signal to an intermediate frequency to complete demodulation and sampling, so that conversion from an analog signal to a digital signal is realized; the baseband chip captures and tracks the Beidou signal and resolves short message information, when the short message information is sent, the baseband chip generates BPSK modulation signals, the BPSK modulation signals are converted to an L wave band through the frequency conversion on the transceiver chip, the small signals are amplified in a large power mode through the attack and release, and long-distance transmission of the signals is achieved.
Preferably, the RNSS module adopts an SMD pad, and transmits positioning, speed, and navigation information to the main control module through a serial port.
Preferably, the big dipper antenna includes: RNSS receiving antenna, big dipper short message receiving antenna and big dipper short message transmitting antenna, three are trinity stromatolite ceramic antenna.
Preferably, the key acquisition module judges external pressing and lifting actions and converts the external pressing and lifting actions into high and low levels in the circuit, and the main control module realizes corresponding functions, is convenient to operate and realizes man-machine interaction.
Preferably, the display screen module adopts a monochromatic display screen, has high contrast, wide viewing angle and high response speed, supports an SPI/I2C interface, and realizes the display functions of longitude and latitude, time data, beam information, short message information and equipment information.
Preferably, the bluetooth module uses a chip Nordic nRF52832 to support multiple communication interfaces: UART/SPI/I2C, realize the wireless bluetooth transmission of closely, conveniently expand cell-phone and flat board application.
Preferably, the main control module is provided with a USB interface, and the USB/TYPE-C connection power adapter realizes charging based on the USB interface.
Preferably, the intelligent charging and discharging system further comprises a built-in lithium battery, the main control module is provided with an ADC interface, and the lithium battery is connected to the ADC interface based on the charging and discharging electric quantity acquisition circuit to realize power supply; the lithium battery is connected with the power adapter to realize charging based on the charging and discharging electric quantity acquisition circuit.
Preferably, the main control module is provided with an SWD debugging interface.
The beneficial effects of the utility model
The utility model relates to a portable terminal, it is small, easy operation is fit for the field work personnel and wears the use.
The utility model discloses functions such as integrated big dipper No. three RDSS short message communication, RNSS location, bluetooth communication and voice broadcast have reached 5 s/time on the position frequency of reporting. The built-in battery, the time of endurance is long, supports wireless communication mode, and small in size easily carries. Based on the perfect combination with a mobile phone, the system meets the requirements of satellite voice transmission, picture transmission, position report, track presentation, emergency alarm, information interaction and the like, and is suitable for being used in scenes such as water surface lifesaving, outdoor travel, field operation and the like.
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FIG. 1 is a block diagram of the hardware components of the present invention
FIG. 2 is an assembly exploded view of the present invention
FIG. 3 is a schematic view of the appearance of the present invention
Detailed Description
The present invention will be further explained with reference to the following examples, but the scope of the present invention is not limited thereto:
with reference to fig. 1, a wearable Beidou No. three short message terminal includes: main control module, RSMC module, RNSS module, display screen module, button collection module, bluetooth module and button, wherein: the RNSS module and the RSMC module are respectively connected with the main control module, the RNSS module and the RSMC module are connected through a Beidou antenna, and a Beidou SIM card is placed in the RSMC module; the master control module is internally provided with a Bluetooth module and is communicated with the smart phone based on Bluetooth; the main control module is provided with a key acquisition module and a display screen module, and human-computer interaction is realized based on the keys and the display screen.
In this embodiment, an embedded processor of GD32F407 is used as a main control module, and GD32F407 has very strong computing power, good kernel performance and external interface, and low power consumption. The GD32 has the advantages of high integration level, strong function, simple structure and convenience in development due to the high-performance low-interruption time delay characteristic, so that the GD32 is very suitable for development schemes in the field of terminal navigation.
The GD32F407 series interconnected products adopt a brand-new process design, and integrate strong operation efficiency and rich peripheral interfaces. The processor has the highest dominant frequency of 168MHz, and provides a complete DSP instruction set, parallel computing power and a special floating point arithmetic unit (FPU). In order to deal with the resource overhead of a plurality of peripheral devices running simultaneously and an embedded software protocol stack, a 512KB to 3072KB ultra-large capacity built-in Flash and an SRAM with the capacity as much as 192KB are provided. The kernel accesses the flash memory, the zero-wait is high, and the working performance under the highest main frequency can reach 210DMIPS.
The chip is powered by 2.6V-3.6V, and the I/O port can bear 5V level. The built-in power management unit supports advanced power management and provides three power saving modes, the working current in all the peripheral full-speed running modes is only 500 muA/MHz, the standby current in the battery power supply process is only 2 muA at the lowest, and the excellent energy efficiency ratio is realized. The device is provided with 2 16-bit advanced timers supporting three-phase PWM complementary output and a Hall acquisition interface, can be used for vector control, and is also provided with up to 8 16-bit universal timers, 2 32-bit universal timers, 2 16-bit basic timers and 2 eight-channel DMA controllers.
The GD32F407 series has integrated on-chip rich innovative peripheral resources to enhance connectivity. The USB 2.0OTG wireless transmission system comprises up to 4 USARTs, 2 UARTs, 3 SPIs, 3 rapid I2 Cs, 2I 2 Ss, 2 CAN2.0Bs, 1 SDIO interface and 1 10/100M rapid Ethernet Media Access Controller (MAC), is provided with a USB 2.0OTG Full Speed (Full Speed12 Mbps) interface and a High Speed (High Speed 480 Mbps) interface, and can provide multiple transmission modes such as devices, HOSTs, OTGs and the like. The USB 2.0FS full-speed interface also has a separate 48MHz oscillator instead of an external crystal oscillator. The chip is provided with 3 12-bit high-speed ADCs with sampling rates up to 2.6M SPS, up to 24 reusable channels are provided, a 16-bit hardware oversampling filtering function and a resolution configurable function are additionally arranged, and the chip is also provided with 2 12-bit DACs, so that higher cost performance is provided for supporting mixed signal control. Up to 80% of available GPIOs have multiple optional functions and also support port remapping, with excellent flexibility and ease of use to meet multiple application requirements.
The GD32F407 series provides excellent flash caching and connectivity solutions, making it more suitable for interconnect applications. The new product is provided with 4 independent SRAM memories in an advanced cache architecture, and can support the simultaneous access of the master devices on different buses. The added 64KB core specific cache (TCM RAM) can serve as both a stack for system operation and as a high-speed operation buffer, thereby helping to deliver the highest performance of the core. The 32-bit bus interface EXMC also supports the expansion of an external SDRAM memory, and can flexibly and conveniently perform high-capacity data caching and high-level interface control with higher cost performance. In addition, an 8-bit to 14-bit Camera video interface is also provided, so that the digital Camera can be conveniently connected, and image acquisition and transmission can be realized. The product has excellent electrostatic protection (ESD) and electromagnetic compatibility (EMC) capabilities, and meets industrial grade high reliability and temperature standards.
The utility model discloses integrated big dipper No. three RDSS short message communication, RNSS positioning function module, specific include:
RSMC Module model FH-BDM305:
the Beidou short message module adopts a stamp sticker form, and the interior of the Beidou short message module is not integrated with an RNSS positioning function. The Beidou short message service is provided through L frequency band signals and S frequency band signals of GEO satellites in the Beidou third-order nominal space constellation. After the user finishes applying for registration, the short message communication service in modes of on-demand, multicast, broadcast and the like can be obtained.
The Beidou short message module transmits signals at Lf1 (1614.26 MHz) and Lf2 (1618.34 MHz) of an L frequency band, and adopts Direct Sequence Spread Spectrum (DSSS) and BPSK modulation. The big dipper short message module receives signals in an S frequency band of 2483.5 MHz-2500 MHz, comprises a pilot frequency branch S2C _ p and a message branch S2C _ d, and adopts Direct Sequence Spread Spectrum (DSSS) and BPSK modulation.
The Beidou short message module integrates an S-frequency point low-noise amplifying circuit, a radio frequency transceiving chip, a 5W power amplifier circuit, a baseband circuit and the like, and realizes the Beidou third-generation short message transceiving function. The Beidou short message module can support outbound messages with three code rates of 8Kbps/16Kbps/24Kbps in a full-face self-adaptive manner, automatically select the information rate and the inbound signal frequency of the messages of the station and support the short message communication function from 1bit to 14000bit (namely 1000 Chinese characters). The transmitting power can be set and adjusted according to 1dB step according to the user requirements (the maximum transmitting power is not more than 5W), and the method is suitable for being applied to the field of short messages in the Beidou No. three area.
RNSS module model MXT901CS:
the RNSS module is a positioning module supporting B1C signals developed based on a new generation of GNSS chips. The module supports multi-system joint positioning, is compatible with a mainstream navigation positioning module in the market in packaging size, has the characteristics of high performance, interference resistance and the like, and is a high-performance satellite navigation positioning module. The RNSS module supports B1C signals, has compact overall dimension, adopts SMD bonding pads, has the characteristics of anti-interference, high performance and the like, and is very suitable for volume-sensitive application occasions. The module is mainly characterized in that:
Figure BDA0003914535940000041
support BDS/GPS dual-system combined positioning
Figure BDA0003914535940000042
Support big dipper third satellite B1C signal
Figure BDA0003914535940000043
Support RTD, sub-meter precision
Figure BDA0003914535940000044
Supports AGNSS and can realize quick positioning
Figure BDA0003914535940000045
Smart supress anti-interference technology
Figure BDA0003914535940000046
High sensitivity design and reliable performance
Figure BDA0003914535940000047
And (4) industrial module standards.
Beidou antenna model HG _ HING3063:
the Beidou antenna module comprises an RNSS receiving antenna, a Beidou short message receiving antenna and a Beidou short message transmitting antenna. RNSS receiving antenna and big dipper short message receiving antenna are responsible for receiving the satellite signal that the satellite was broadcast, and big dipper short message transmitting antenna is responsible for launching big dipper short message inbound signal to the satellite. The antenna is used as the first stage of a terminal for receiving satellite signals and the last stage of transmitting radio frequency signals to the satellite, the performance of the antenna plays a decisive role in performance indexes of the whole terminal, and the research and development focuses on how to improve the gain of the antenna at each frequency point and the receiving and transmitting isolation. A three-in-one laminated ceramic antenna was chosen for modular miniaturization, integration and low cost.
The Bluetooth module adopts a chip Nordic nRF52832 to support various communication interfaces: UART/SPI/I2C, realize the wireless bluetooth transmission of closely, conveniently expand cell-phone and flat board application.
The Bluetooth 5.0 low-power module is based on an ultra-low-power Bluetooth module with powerful functions, small volume and high flexibility of Nordic nRF 52832. The core has a high-performance ARM Cortex-M4F core, and the dominant frequency is 64M; diversified communication interfaces: UART/SPI/I2C, extensive peripheral resources and complete SDK routines provide convenience for secondary development.
Figure BDA0003914535940000051
And (3) storing: 1MB flash,256KB RAM;
Figure BDA0003914535940000052
effective communication distance: 150m (open ground), 40m (indoor);
Figure BDA0003914535940000053
the transmission speed is as follows: 2Mbps,1Mbps,500kbps and 125kbps;
Figure BDA0003914535940000054
working frequency band: 2.36-2.50 GHz;
Figure BDA0003914535940000055
working voltage: 1.7V to 5.5V (3.3V is recommended);
Figure BDA0003914535940000056
working temperature: -40 ℃ to +85 ℃;
Figure BDA0003914535940000057
product size: 18mm × 13mm;
Figure BDA0003914535940000058
an antenna interface: the IPEX interface.
The bluetooth antenna all selects to be fit for small-size equipment FPC antenna, and the FPC antenna is equivalent to pulling out the antenna circuit on the PCB board, makes the antenna with other outside metals. Be applicable to almost all small-size electronic product, customize according to wearable big dipper short message terminal structure, be fit for doing the antenna of bluetooth, the performance is good, and the cost is also lower.
The key acquisition module judges external pressing and lifting actions and converts the external pressing and lifting actions into high and low levels in a circuit, and the main control module realizes corresponding functions, is convenient to operate and realizes man-machine interaction.
Specifically, the display screen module adopts a monochromatic display screen, has high contrast, wide viewing angle and high response speed, supports an SPI/I2C interface, and realizes the display functions of longitude and latitude, time data, beam information, short message information and equipment information.
An OLED display is a display made using organic electroluminescent light-emitting diodes. Because of having the self-luminous organic electroluminescent diode, it does not need the backlight, the contrast is high, the thickness is thin, the viewing angle is wide, the reaction rate is fast, can be used in the flexible panel, the use temperature range is wide, the structure and process are simpler and so on excellent characteristic. The OLED is an all-solid-state and non-vacuum device, and has the characteristics of shock resistance, low temperature resistance and the like.
The wearable Beidou short message terminal display screen adopts a monochromatic display screen with the resolution ratio of 128 × 64, the control chip is SPD0301, the interface type is 8-bit 68XX/80XX parallell, 3/4-wire SPI and I2C, and the display colors are white, yellow and blue.
The main technical indexes are as follows:
Figure BDA0003914535940000059
resolution 128 x 64 (4 rows can be displayed, 1 per row)6 hanzi);
Figure BDA00039145359400000510
a display area: 35.052 x 17.516;
Figure BDA00039145359400000511
a viewing angle direction; a full viewing angle;
Figure BDA00039145359400000512
working temperature: -40 ℃ to 70 ℃;
Figure BDA00039145359400000513
working voltage: 3.3V;
Figure BDA00039145359400000514
the connection mode is as follows: 0.5mm interval plug-in type FPC.
Specifically, the main control module is provided with a USB interface, and the USB/TYPE-C connection power adapter is connected to realize charging based on the USB interface.
Preferably, the charging and discharging circuit is divided into a USB charging circuit and a lithium battery discharging circuit. The USB charging circuit selects a special charging chip, and the USB output voltage is reduced to 4.2V of lithium battery charging voltage. The lithium battery discharge circuit is divided into five paths.
The 1 st path boosts the voltage (3.3-4.2V) of the lithium battery to 5V to supply power to the Beidou short message module;
the 2 nd path reduces the voltage (3.3-4.2V) of the lithium battery to 3.3V and supplies power to the Bluetooth MCU module;
the 3 rd path reduces the voltage (3.3-4.2V) of the lithium battery to 3.3V and supplies power to the RNSS module and the OLED module;
the 4 th path reduces the voltage (3.3-4.2V) of the lithium battery to 3.3V and supplies power to the audio interface chip module;
and the 5 th path reduces the voltage (3.3-4.2V) of the lithium battery to 1.8V and supplies power to the audio interface chip.
In a more preferred embodiment, the master control module is provided with an SWD debugging interface.
With reference to fig. 2 to fig. 3, a specific assembly structure diagram is provided in the embodiment, and the terminal structure includes: apron 1, display screen 2, antenna 6, mainboard 5, lithium cell 4, box body 3. The main control module and the Bluetooth module are both arranged on the mainboard 5, and the antenna 6 is connected with the mainboard 5; the mainboard 5 and the lithium battery 4 are electrically connected and are jointly embedded into the box body 3, and the lithium battery 4 is positioned on the lower side of the mainboard 5 in the box body 3; display screen 2 is connected with the host system electricity, offers the installing frame of display screen 2 on apron 1, supplies the embedding of display screen 2, and the user of being convenient for reads information. Set up button collection module at the side of terminal structure, box body 3 and apron 1 pass through the screw fastening, and in the preferred embodiment, install the sealing washer between the two, the outside kneck of equipment all adopts waterproof device or carries out waterproof design.
The terminal performance effect of the embodiment is as follows:
(1) The Beidou RDSS short message function is realized;
Figure BDA0003914535940000061
the position reporting function is provided;
Figure BDA0003914535940000062
the BDS RNSS positioning function is achieved, and the frequency points simultaneously support B1I and B1C;
Figure BDA0003914535940000063
supporting the transmission of Chinese characters and codes;
Figure BDA0003914535940000064
SOS one-key help seeking is supported;
Figure BDA0003914535940000065
the Bluetooth wireless connection function is provided;
Figure BDA0003914535940000066
the large-capacity lithium battery has ultra-long endurance;
Figure BDA0003914535940000067
the display function of a liquid crystal screen is supported;
Figure BDA0003914535940000068
small volume, light weight and convenient carrying.
(2) Positioning performance
Figure BDA0003914535940000069
Positioning the receiving frequency point, supporting: BDS B1L, B C
Figure BDA00039145359400000610
Positioning accuracy (RMS): level<5.0m, elevation<10m
Figure BDA00039145359400000611
Capture sensitivity-140 dBm
Figure BDA00039145359400000612
Tracking sensitivity-155 dBm
Figure BDA00039145359400000613
Accuracy of velocity measurement (RMS) 0.2m/s
Figure BDA00039145359400000614
The first positioning time is less than or equal to 35s (cold start)
Figure BDA00039145359400000615
Less than or equal to 5s (hot start)
Figure BDA00039145359400000616
Timing precision of better than 1s
Figure BDA00039145359400000617
Data update frequency supporting 1Hz
(3) Short message performance
Figure BDA00039145359400000618
Reception frequency point (S band): 2492MHz
Figure BDA00039145359400000619
Transmission frequency point (L band): 1616MHz
Figure BDA00039145359400000620
The EIRP value of the emission signal is 3 dBW-12 dBW
Figure BDA00039145359400000621
Receiving sensitivity of-124.6 dBm (Beidou special darkroom detection)
Figure BDA00039145359400000622
Receiving and sending success rate:>98％(Open SKY)
Figure BDA00039145359400000623
power consumption:<1000mA
Figure BDA00039145359400000624
the first capture time is less than or equal to 2s
Figure BDA0003914535940000071
The carrier suppression of the transmitted signal is more than or equal to 30dBc
Figure BDA0003914535940000072
The accuracy of the transmitting frequency is less than or equal to 5 multiplied by 1E-7
Figure BDA0003914535940000073
Beidou communication capacity supporting Beidou third-order regional short message
Figure BDA0003914535940000074
The maximum 1000 Chinese characters (determined by the grade of the Beidou IC card);
(4) The performance of the whole machine is as follows:
Figure BDA0003914535940000075
battery capacity: 6200mAh
Figure BDA0003914535940000076
Average standby: 2.5W
Figure BDA0003914535940000077
And (3) at the moment of emission: 20W
Figure BDA0003914535940000078
Working temperature: minus 30 ℃ to plus 55 DEG C
Figure BDA0003914535940000079
Storage temperature: minus 40 ℃ to +85 DEG C
Figure BDA00039145359400000710
Protection capability: IP67
Figure BDA00039145359400000711
Moist heat: the temperature is 40 ℃, the humidity is 93 percent, and the time is 48h
Figure BDA00039145359400000712
Salt spray: spraying for 24 hours at the temperature of 35 ℃ and the pH value of 6.5-7.2
It should be noted that: those skilled in the art can understand that all or part of the steps in the methods of the above embodiments may be completed by instructing the relevant hardware through circuit configuration, and the circuit configuration may be completed through a single chip or other integrated chips with similar functions, which is the prior art. The core utility model is characterized in that the overall structure layout of the system is designed, and the local control method can be completed by programming in the prior art; the local module connection can be realized by the prior art. Specifically in this application, host system, RSMC module, RNSS module, big dipper antenna, bluetooth module, charge-discharge electric quantity acquisition circuit all are the current module that the accessible market purchased the acquisition, the utility model discloses a core innovation point lies in the terminal equipment who has designed each module of integration, realizes wearable portable multi-functional. Based on the structure proposed in the present application, those skilled in the art know how to perform debugging to achieve the purpose of the present invention, and should not be considered as a limitation to the protection object of the present application.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides a wearable big dipper No. three short message terminals which characterized in that it includes: main control module, RSMC module, RNSS module, display screen module, button collection module, bluetooth module and button, wherein: the RNSS module and the RSMC module are respectively connected with the main control module, a Beidou antenna is arranged between the RNSS module and the RSMC module, and a Beidou SIM card is placed in the RSMC module; a Bluetooth module is arranged in the main control module and is communicated with the smart phone based on Bluetooth; the main control module is provided with a key acquisition module and a display screen module, and human-computer interaction is realized based on the keys and the display screen.
2. The wearable Beidou No. three short message terminal according to claim 1, characterized in that the RSMC module adopts a stamp sticker structure, and a low noise amplifier, a filter, a radio frequency transceiver chip, a baseband chip and a 5W power amplifier are integrated in the RSMC module.
3. The wearable Beidou No. three short message terminal as claimed in claim 1, wherein the RNSS module adopts SMD pads to transmit positioning, speed and navigation information to the main control module through a serial port.
4. The wearable Beidou No. three short message terminal according to claim 1, wherein the Beidou antenna comprises: RNSS receiving antenna, big dipper short message receiving antenna and big dipper short message transmitting antenna, three are trinity stromatolite ceramic antenna.
5. The wearable Beidou No. three short message terminal according to claim 1, wherein the key collection module judges external pressing and lifting actions, converts the external pressing and lifting actions into high and low levels in a circuit, and the main control module realizes corresponding functions, is convenient to operate and realizes man-machine interaction.
6. The wearable Beidou No. three short message terminal according to claim 1, characterized in that the display screen module is a monochrome display screen, has high contrast, wide viewing angle and high response speed, supports SPI/I2C interface, and realizes the display functions of longitude and latitude, time data, beam information, short message information and equipment information.
7. The wearable Beidou I three-number short message terminal according to claim 1, wherein the Bluetooth module adopts a chip Nordic nRF52832 to support various communication interfaces: UART/SPI/I2C, realize the wireless bluetooth transmission of closely, conveniently expand cell-phone and flat board application.
8. The wearable Beidou No. three short message terminal according to claim 1 is characterized in that the master control module is provided with a USB interface, and the USB/TYPE-C connection power adapter is connected to realize charging based on the USB interface.
9. The wearable Beidou No. three short message terminal according to claim 8, characterized by further comprising a built-in lithium battery, wherein the master control module is provided with an ADC interface, and the lithium battery is connected to the ADC interface to realize power supply based on a charging and discharging electric quantity acquisition circuit; the lithium battery is connected with the power adapter to realize charging based on the charging and discharging electric quantity acquisition circuit.
10. The wearable Beidou No. three short message terminal according to claim 1, characterized in that the main control module is provided with an SWD debugging interface.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116095620A (en) * 2023-04-11 2023-05-09 北京北斗华大科技有限公司 RDSS short message function realization system and method based on wireless network

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CN116095620A (en) * 2023-04-11 2023-05-09 北京北斗华大科技有限公司 RDSS short message function realization system and method based on wireless network

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