Portable positioning beacon device

Abstract

The utility model discloses a portable positioning beacon device, and relates to the technical field of positioning beacons. The device comprises a Bluetooth module, a Beidou positioning module, a Beidou antenna, a LoRa module, a LoRa antenna, an SOS button, an LED indicating lamp, a buzzer, an on-off button, an on-off control circuit, a power switching circuit, a lithium battery charging circuit, a charging and discharging protection circuit, a linear power switching circuit, a first buck-boost circuit, a second buck-boost circuit, a solar cell panel and a charging interface. A temperature detection circuit, an electric quantity detection circuit and a lithium battery. The equipment is simple in circuit structure, is easy to realize light weight, has a long-distance communication capability, is lower in power consumption, has a charging function, and can meet the requirements of personnel position information sharing and communication in field operation and exploration processes.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning beacons, in particular to a portable positioning beacon device, which can meet the location information sharing and communication needs of outdoor explorers and field scientific research personnel. Background Art

[0002] Outdoor explorers and field expedition personnel often get lost and face life-threatening situations in unfamiliar outdoor environments. When organizing search and rescue operations, the rescue team is unable to find trapped people in time due to complex terrain. In the absence of communication base stations in the wild, team members can use positioning beacon devices to communicate with each other. However, existing positioning beacon devices are often large in size and inconvenient to carry. In addition, they have problems such as high power consumption and short standby time. Therefore, they are not suitable for use when personnel are working in the field for a long time. Utility Model Content

[0003] In view of this, the utility model proposes a portable positioning beacon device, which has a simple circuit structure, is easy to achieve lightweight, has long-distance communication capabilities, low power consumption, and a charging function, and can meet the needs of personnel location information sharing and communication during field operations and explorations.

[0004] The technical solution adopted by the utility model is:

[0005] A portable positioning beacon device, comprising a Bluetooth module, a Beidou positioning module, a Beidou antenna, a LoRa module, a LoRa antenna, an SOS button, an LED indicator, a buzzer, a power button, a power control circuit, a power switching circuit, a lithium battery charging circuit, a charging and discharging protection circuit, a linear power conversion circuit, a first buck-boost circuit, a second buck-boost circuit, a solar panel, a charging interface, a temperature detection circuit, a power detection circuit and a lithium battery;

[0006] The Beidou antenna is connected to the Beidou positioning module, and the LoRa antenna is connected to the LoRa module;

[0007] The Bluetooth module is used as the main control unit, connected to the Beidou positioning module through the serial port, connected to the LoRa module through the SPI interface, connected to the temperature detection circuit through the I2C bus, and connected to the buzzer, LED indicator and SOS button through the GPIO interface;

[0008] The solar panel and the lithium battery are both connected to the power switching circuit, the power switching circuit is connected to the lithium battery charging circuit, the lithium battery charging circuit is connected to the charging input interface of the charging and discharging protection circuit, the charging and discharging interface of the charging and discharging protection circuit is connected to the lithium battery, and the discharge output interface of the charging and discharging protection circuit is respectively connected to the linear power conversion circuit, the first buck-boost circuit, and the second buck-boost circuit; the power detection circuit is connected to the lithium battery, and is connected to the Bluetooth module through the I2C bus;

[0009] The power button is connected to the power control circuit, the power supply enable control terminal of the power control circuit is connected to the linear power conversion circuit, and the linear power conversion circuit supplies power to the Bluetooth module;

[0010] The first enable control terminal of the Bluetooth module is connected to the first buck-boost circuit, the second enable control terminal of the Bluetooth module is connected to the second buck-boost circuit, the first buck-boost circuit is connected to the LoRa module and supplies power to it, and the second buck-boost circuit is connected to the Beidou positioning module and supplies power to it.

[0011] Furthermore, the Bluetooth module is a multi-protocol system-on-chip of model nRF52840 produced by NORDIC.

[0012] The beneficial effects of the utility model are:

[0013] 1. The device has a simple circuit structure, high integration, easy to achieve lightweight and easy to carry.

[0014] 2. The device has a simple circuit structure, low overall power consumption, and has multiple charging functions, which can achieve a long standby time.

[0015] 3. The device is equipped with a LoRa module, which can realize low-power long-distance communication and meet the needs of sharing personnel location information during field operations and exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0017] Figure 2 It is a schematic diagram of the circuit structure of the utility model;

[0018] Figure 3 It is the main program control flow chart. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] A portable positioning beacon device, such as Figure 2As shown, it includes a main control MCU (i.e., a Bluetooth module), a Beidou positioning module, a Beidou antenna, a LoRa module, a LoRa antenna, an SOS button, an LED indicator, a buzzer, a power button, a power control circuit, a power switching circuit, a lithium battery charging circuit, a charging and discharging protection circuit, a linear power conversion circuit, a buck-boost circuit 1, a buck-boost circuit 2, a solar panel, a Type-C charging interface, a temperature detection circuit, a power detection circuit, and a lithium battery;

[0021] The Beidou antenna is connected to the Beidou positioning module, and the LoRa antenna is connected to the LoRa module;

[0022] The main control MCU is connected to the Beidou positioning module through the serial port, connected to the LoRa module through the SPI interface, connected to the temperature detection circuit through the I2C bus, and connected to the buzzer, LED indicator and SOS button through the GPIO interface;

[0023] The solar panel and the lithium battery are both connected to the power switching circuit, the power switching circuit is connected to the lithium battery charging circuit, the lithium battery charging circuit is connected to the charging input interface of the charging and discharging protection circuit, the charging and discharging interface of the charging and discharging protection circuit is connected to the lithium battery, and the discharging output interface of the charging and discharging protection circuit is respectively connected to the linear power conversion circuit, the buck-boost circuit 1, and the buck-boost circuit 2; the power detection circuit is connected to the lithium battery, and is connected to the main control MCU through the I2C bus;

[0024] The power button is connected to the power control circuit, the power supply enable control terminal of the power control circuit is connected to the linear power conversion circuit, and the linear power conversion circuit supplies power to the main control MCU;

[0025] The enable control terminal 1 of the main control MCU is connected to the buck-boost circuit 1, the enable control terminal 2 of the main control MCU is connected to the buck-boost circuit 2, the buck-boost circuit 1 is connected to the LoRa module and supplies power to it, and the buck-boost circuit 2 is connected to the Beidou positioning module and supplies power to it.

[0026] The device looks like Figure 1As shown, the device is rectangular in shape as a whole, small in size and easy to carry. A solar panel is designed on the front of the device for charging. Considering the long-term outdoor use of the device, the heat transfer from the solar panel may threaten the safety of the lithium battery in the device. The solar panel part 2 on the front of the device is connected to the main body of the device by a layered hollow structure 6, which is used to isolate the heat of the solar panel and passive ventilation and heat dissipation of the device. There are also three LED indicator lights 1 designed on the front of the device, including: a positioning indicator light, a communication indicator light, and a Bluetooth status indicator light. Two buttons are designed on the side of the device, including: a power button 5 and an SOS button 4. Among them, the power button integrates an indicator light function, which can indicate the three states of power on, charging, and low power. A Type-C charging interface 7 is designed at the bottom of the device, and the LoRa antenna of the device is an external rod antenna 3.

[0027] In this device, the main control MCU controls the LoRa module to realize the self-organizing network function, the Beidou positioning module realizes the satellite positioning function, the Bluetooth function of the main control MCU realizes the connection between the device and the user's mobile phone, the buttons and LED indicator lights realize the human-computer interaction function, and the device is powered by a built-in lithium battery.

[0028] This device supports alarm and one-key SOS functions. When the network is disconnected or the safe distance with the neighboring node exceeds the safety distance, the buzzer will sound an alarm. When the user encounters an emergency, long press the SOS button, and the device will cyclically broadcast an emergency message with location information.

[0029] In the embodiment, the model of the main control MCU is nRF52840, which can be connected to the user's mobile phone through a Bluetooth link, and the user can view the positioning information and send and receive data. The model of the LoRa module is SX1278, and the model of the Beidou positioning module is ATGM336H. The Beidou antenna is a built-in ceramic antenna, and the LoRa antenna is an external rod antenna. The main control MCU connects the indicator light and buttons through the GPIO port to meet the human-computer interaction function. When the device is disconnected from the network or exceeds the safe distance from the neighboring node, the main control MCU controls the buzzer to sound an alarm. The device has a built-in temperature detection circuit, which can view the temperature parameters in real time. If the temperature is too high, it automatically enters the low power consumption mode. This device supports two charging methods: solar energy and Type-C. The power switching circuit is the SLG59H1401C chip. By detecting the Type-C insertion event, it is preferred to switch to the external charging mode. The input voltage is connected to the lithium battery charging and discharging chip DA9168 for charging. The lithium battery is connected to the charging protection board DW01 chip to avoid battery overcharging, over-discharging and overcurrent failures. The linear power conversion circuit model is TPS73633, which is used to power the main control MCU, and the power supply enable control can be realized by the power on / off control circuit STM6601, thereby realizing the power on / off operation. The buck-boost circuit 1 and buck-boost circuit 2 are implemented by the TPS63020 chip, which are controlled by the MCU enable terminal respectively, and the power supply can be turned off respectively in low power mode. The power detection circuit uses the MAX17048G+T10 chip, and the temperature detection circuit model is TMP102AIDRLR. The power and temperature detection results are reported to the main control MCU through the I2C bus.

[0030] The self-organizing network part is built based on the Rime protocol stack, making full use of the low-power design of the Rime protocol stack to effectively extend the standby time of the beacon device during field operations. The Rime protocol stack code is lightweight, has low memory requirements, is easy to port and deploy, and can be flexibly adjusted according to actual scenarios to build customized applications. In view of the risk of teammates losing contact during outdoor adventures, this device fully utilizes the distributed network characteristics of the Rime protocol stack and combines the advantages of Beidou positioning to design a routing table maintenance method based on the relative safety distance of beacons. On the basis of reducing the frequency of routing table maintenance as much as possible, the routing table maintenance event can be triggered by two conditions: the scheduled refresh task and the beacon relative distance judgment task. On the basis of meeting the maintenance requirements of the self-organizing network link, this device effectively reduces the power consumption of the device and avoids the excessive dispersion of personnel leading to exceeding the safe communication distance. When the device is initialized, the safe distance parameter between neighboring nodes is configured to be less than the single-hop communication distance of the LoRa module to ensure that the team members are not too dispersed.

[0031] The main program control flow of this device is as follows Figure 3 As shown:

[0032] After the device is powered on, the initialization function of each module is completed first. When the device is initialized, the safety distance parameter between neighboring nodes is configured to be less than the single-hop communication distance of the LoRa module to ensure that the team members are not too dispersed. After completing the initialization, the self-organizing network establishment process is entered. This device builds a self-organizing network with surrounding nodes based on the Rime protocol stack and records the routing table information. Each node will store routing table information, including the positioning information of neighboring nodes. In order to increase the standby time of the device, this device only communicates in the allocated time slot, and the rest of the time is in sleep mode. In sleep mode, the LoRa module and positioning module are powered off to reduce the standby power consumption of the device. When the sleep time is up, the device enters the data sending and receiving mode. Each short message carries the positioning information of the sender. The receiver can calculate the distance to the neighboring node based on the positioning information. If the neighboring node exceeds the safety distance, there may be a risk of loss of connection. This node will re-initiate the routing establishment process. Due to the movement of the node, the network topology of the new routing table will change. When the new routing table is successfully established, this process will be exited. If the establishment fails, an alarm prompt will be issued.

[0033] After the device is powered on, the initialization function of the device is completed first, including the parameter configuration of each module. When the device is initialized, the safety distance parameter between neighboring nodes is configured to be less than the single-hop communication distance of the LoRa module to ensure that the team members are not too dispersed. Then enter the self-organizing network establishment process, complete the networking function with the surrounding nodes based on the Rime protocol stack, and record the routing table information. In order to increase the standby time of the device, this device only communicates in a specific time slot, and the rest of the time is in sleep mode. The internal timer of the main control MCU is used for timing. When the sleep time is up, the device enters the data sending and receiving mode. Each short message sent and received carries the location information of the sender. The receiver can calculate the distance between itself and the neighboring node based on the location information. Determine the distance between this node and the neighboring node in the routing table. If it exceeds the safety distance, it will enter the sleep mode. If it is greater than the safety distance, there may be a risk of loss of connection. This node will re-initiate the routing establishment process. If the establishment of the new routing table fails, an alarm prompt will be issued. If the establishment is successful, this process will end.

[0034] This device has a built-in Beidou positioning module, which can obtain positioning information and time information. The main control MCU realizes the self-organizing network communication function with other beacon nodes by controlling the LoRa module. Users can connect the device via Bluetooth and use the supporting APP software to view the location and send short message communications. Users can understand the status of the device by observing the device indicator light. In case of emergency, they can press and hold the SOS button to broadcast emergency messages carrying location information in a loop. When going out to perform tasks, the device can be hung on the shoulder and the solar panel can be adjusted to face the sky, which will effectively extend the working time of the device.

[0035] In short, this device makes full use of the low power consumption and advantages of LoRa, and combines solar charging technology and low power consumption control strategy to effectively extend the working time of the device. In order to achieve long-term operation of the device, the routing table maintenance method is optimized to solve the problems of high link maintenance overhead, high power consumption and short standby time of existing self-organizing network devices.

[0036] This device implements the self-organizing network function based on the Rime protocol stack. During the communication process, it determines the relative distance of the neighbor nodes in the routing table based on the positioning information carried in the message. If the safe distance is exceeded, the routing table update task is triggered and an alarm is issued, which effectively reduces the power consumption of the equipment and avoids exceeding the safe communication distance due to excessive dispersion of personnel.

Claims

1. A portable positioning beacon device, characterized in that: Including Bluetooth module, Beidou positioning module, Beidou antenna, LoRa module, LoRa antenna, SOS button, LED indicator, buzzer, power button, power control circuit, power switching circuit, lithium battery charging circuit, charging and discharging protection circuit, linear power conversion circuit, first buck-boost circuit, second buck-boost circuit, solar panel, charging interface, temperature detection circuit, power detection circuit and lithium battery; The Beidou antenna is connected to the Beidou positioning module, and the LoRa antenna is connected to the LoRa module; The Bluetooth module is used as the main control unit, connected to the Beidou positioning module through the serial port, connected to the LoRa module through the SPI interface, connected to the temperature detection circuit through the I2C bus, and connected to the buzzer, LED indicator and SOS button through the GPIO interface; The solar panel and the lithium battery are both connected to the power switching circuit, the power switching circuit is connected to the lithium battery charging circuit, the lithium battery charging circuit is connected to the charging input interface of the charging and discharging protection circuit, the charging and discharging interface of the charging and discharging protection circuit is connected to the lithium battery, and the discharge output interface of the charging and discharging protection circuit is respectively connected to the linear power conversion circuit, the first buck-boost circuit, and the second buck-boost circuit; the power detection circuit is connected to the lithium battery, and is connected to the Bluetooth module through the I2C bus; The power button is connected to the power control circuit, the power supply enable control terminal of the power control circuit is connected to the linear power conversion circuit, and the linear power conversion circuit supplies power to the Bluetooth module; The first enable control terminal of the Bluetooth module is connected to the first buck-boost circuit, the second enable control terminal of the Bluetooth module is connected to the second buck-boost circuit, the first buck-boost circuit is connected to the LoRa module and supplies power to it, and the second buck-boost circuit is connected to the Beidou positioning module and supplies power to it.

2. A portable positioning beacon device according to claim 1, characterized in that: The Bluetooth module is a multi-protocol system-on-chip of model nRF52840 produced by NORDIC.

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