CN218630197U - High-precision positioning terminal for railway protection board - Google Patents

Abstract

The utility model belongs to the technical field of railway operation protection, concretely relates to high-precision positioning terminal for railway protection plate, including the common mode shell, the lithium cell is installed to the inside bottom surface of common mode shell, the top of lithium cell is fixed with the circuit board, set up the hardware circuit on the circuit board, the hardware circuit includes main control unit and the high-precision positioning unit, attribute setting unit, gesture detection unit, communication unit and the power management unit that are connected respectively with the main control unit; the high-precision positioning unit is used for providing a high-precision positioning signal; the main control unit is used as a control and operation center; the attribute setting unit is used for setting the state attribute of the high-precision positioning terminal; the attitude detection unit is used for detecting the attitude of the high-precision positioning terminal; the communication unit is used for the communication between the high-precision positioning terminal and the server and between the high-precision positioning terminal and the handheld terminal. The utility model discloses can realize protecting the positional information and the gesture information acquisition of tablet, support the 4G transmission, provide protection tablet monitoring data for the construction operation.

Description

High-precision positioning terminal for railway protection board

Technical Field

The utility model belongs to the technical field of the railway operation protection, concretely relates to high-precision positioning terminal for railway protection tablet.

Background

When the railway construction is carried out on the road, a construction unit needs to arrange a protective board beside the railway for prompting a driver to whistle, limit speed or stop the vehicle. The problems that whether the operation protection plate is placed before construction, whether the placing position is proper, whether the operation protection plate is timely collected after construction and the like also bring certain threats to the safety of train operation and constructors.

Disclosure of Invention

Whether accurate, the operating condition is correct, whether timely problem is retrieved to monitoring protection tablet deployment geographical position among the prior art, the utility model provides a position information and the gesture information acquisition of protection tablet are realized to the high-accuracy positioning terminal who is used for railway protection tablet of low-power consumption, small size, high ageing, support the 4G transmission, provide protection tablet monitoring data for the construction operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a high-precision positioning terminal for railway protection tablet, high-precision positioning terminal fixed mounting is on the protection tablet, including the common mode shell, the inside bottom surface of common mode shell installs the lithium cell, the top of lithium cell is fixed with the circuit board, be provided with the hardware circuit on the circuit board, the hardware circuit includes main control unit and the high-precision positioning unit, attribute setting unit, gesture detection unit, communication unit and the power management unit that are connected respectively with main control unit; the high-precision positioning unit is used for providing a high-precision positioning signal; the main control unit is used as a control and operation center and is responsible for scheduling and assisting the work of other units; the attribute setting unit is used for setting and displaying the state attribute of the high-precision positioning terminal; the attitude detection unit is used for detecting the attitude of the high-precision positioning terminal; the power management unit is connected with the lithium battery and provides power for other units; the communication unit is used for communicating the high-precision positioning terminal with the server and the handheld terminal.

Further, the main control unit adopts an EC20CEFRG module which is a 4G module and internally integrates a CPU.

Furthermore, the communication unit is divided into a public network communication function and a local area network communication function, the EC20CEFRG module is used for selecting the type of the public network communication function, is shared by the main control unit, and is responsible for acquiring differential positioning data from the differential base station server and sending positioning longitude and latitude information, terminal state information, terminal posture information and terminal electric quantity information to the MQTT server; and the local area network communication function model selection uses an NF3303 module to establish a WIFI network hotspot for the access of the handheld terminal.

Furthermore, the high-precision positioning unit uses an Ublox ZED-F9P high-precision positioning module, communicates with the main control unit through a UART protocol, acquires satellite positioning data through an antenna, and calibrates according to differential positioning data returned by the main control unit to obtain high-precision positioning data; and the Ublox ZED-F9P high-precision positioning module is externally connected with a MicroUSB interface as a debugging interface.

Further, the antenna is an active GNSS antenna HX-CH6601A.

Furthermore, the attribute setting unit comprises four keys and four indicating lamps which are arranged below the front face of the common-mode shell, the four keys comprise a switch key, two selection keys and confirmation keys which are used for setting the state attributes of the high-precision positioning terminal, and a reserved key, and different attribute states of the high-precision positioning terminal are displayed through the combination of the four indicating lamps.

Further, the high-precision positioning terminal state attributes comprise an operation board, a locking board, a speed-limiting T board, a speed-limiting O board, a speed-limiting place T board, a speed-limiting place I board, a speed-limiting terminal board and a stop board.

Further, the attitude detection unit uses an accelerometer chip LIS3DH.

Furthermore, the power management unit comprises a lithium battery charging circuit, a lithium battery electric quantity monitoring circuit and a lithium battery distribution circuit; the lithium battery charging circuit adopts an LTC4001 chip to support solar charging and Type-C interface charging, the lithium battery electric quantity monitoring circuit adopts an LTC2942 chip, the lithium battery distribution circuit comprises a TPS63000 voltage conversion chip, an LP5912-1.8 voltage conversion chip and an LP5912-3.3 voltage conversion chip, the TPS63000 voltage conversion chip outputs 3.3V voltage to supply power for an NF3303 module, and the LP5912-1.8 voltage conversion chip outputs 1.8V voltage to supply power for an accelerometer chip LIS3 DH; the LP5912-3.3 voltage conversion chip outputs 3.3V voltage to supply power for the Ublox ZED-F9P high-precision positioning module; the lithium battery directly supplies power for the EC20CEFRG module.

Further, the bottom of common mode shell sets up Type-C interface, common mode shell's positive top fixed mounting solar panel.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses fix high accuracy positioning terminal on protecting the tablet, utilize high accuracy positioning unit to provide high accuracy positioning signal, utilize gesture detecting element to realize high accuracy positioning terminal's gesture detection, utilize the 4G network of main control unit to realize the communication between high accuracy positioning terminal and the server, and then will protect the positional information and the gesture information transmission of tablet for application server through the 4G network, provide the monitoring data who protects the tablet for the construction operation, guarantee train operation and constructor safety.

Drawings

Fig. 1 is a block diagram of a high-precision positioning terminal for a railway protection plate according to an embodiment of the present invention;

fig. 2 is a front internal structure view of a high-precision positioning terminal for a railway protection plate according to an embodiment of the present invention;

fig. 3 is a side internal structure view of a high precision positioning terminal for a railway protection plate according to an embodiment of the present invention;

fig. 4 is a schematic block diagram of a high precision positioning unit according to an embodiment of the present invention;

fig. 5 is a schematic block diagram of an attitude detection unit according to an embodiment of the present invention;

fig. 6 is a functional block diagram of a power management unit of an embodiment of the present invention;

fig. 7 is an installation schematic diagram of the high-precision positioning terminal according to the embodiment of the present invention.

The reference numbers in the figures denote:

1. the system comprises a main control unit, 2 a high-precision positioning unit, 3 an attribute setting unit, 4 a posture detection unit, 5a communication unit, 6 a power management unit, 7 a common mode shell, 8 a circuit board, 9 a power on/off key, 10 a selection key, 11 an enter key, 12 a reserved key, 13 an indicator light, 14 an antenna, 15 a solar panel, 16 a protection board, 17 a high-precision positioning terminal, 18 type-C interfaces and 19 lithium batteries.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.

In the high-precision positioning terminal for the railway protection plate of the embodiment, as shown in fig. 7, the back of the high-precision positioning terminal 17 is fixedly mounted on the protection plate 16 by fixing means such as magic tape, buckle or magnetic attraction; as shown in fig. 2 and 3, the high-precision positioning terminal comprises a common mode housing 7, the size of the common mode housing 7 is 130mm 75mm 30mm (length, width and height), a lithium battery 19 is installed on the inner bottom surface of the common mode housing 7, a circuit board 8 is fixedly placed above the common mode housing 7, a solar panel 15 is fixed above the front surface of the common mode housing 7, four keys and four indicator lamps are arranged below the front surface of the common mode housing 7, a Type-C interface 18 is arranged at the bottom end of the common mode housing 7, the common mode housing 7 comprises an upper cover and a lower cover, a sealing ring is arranged between the upper cover and the lower cover, and rain and snow are prevented from invading the interior of the equipment.

As shown in fig. 1, a hardware circuit is arranged on the circuit board, and the hardware circuit includes a main control unit 1, and a high-precision positioning unit 2, an attribute setting unit 3, an attitude detection unit 4, a communication unit 5, and a power management unit 6 which are respectively connected to the main control unit 1.

The main control unit is used as a control and operation center and is responsible for scheduling and assisting the work of other units, and collecting, summarizing and forwarding data such as the position, the posture and the state (such as the battery power) of the high-precision positioning terminal. The main control unit adopts an EC20CEFRG module, the EC20CEFRG (hereinafter referred to as EC 20) is a 4G module of an OpenCPU of a remote company, and the functions required by the main control unit can be realized by carrying out secondary development on the module without additionally adding a main control chip. The CPU embedded in the EC20 module is a baseband processing platform with an ARM Cortex-A7 architecture, and the highest main frequency of the CPU can reach 1.2GHz. The module supports communication interfaces such as PCM, USB, UART, SDIO, SPI, IIC and the like, and can conveniently carry out data interaction with other units through the interfaces. In addition, the EC20 module is a 4G module, and supports network access of systems such as LTE-FDD, LTE-TDD, WCDMA, TD-SDCMA, CDMA, GSM and the like, so that the EC20 module also plays an important role in a communication unit. The power supply voltage range of the EC20 module is 3.3V-4.3V, the high-precision positioning terminal uses a lithium battery as a power supply, and the full-power voltage of the lithium battery is 4.2V, so that the module is directly powered by the lithium battery. Besides the communication interfaces with other units, the EC20 module also reserves a USB interface and a UART interface for debugging and program downloading. The USB interface can be used for programming firmware in a programming mode, and can also be used as a configuration interface after equipment installation is completed, and the UART interface is used as a debugging interface and used for debugging or testing a single board before the whole machine is installed.

The communication unit is divided into a public network communication function and a local area network communication function, the public network communication mainly refers to 4G communication, the 4G communication function is realized by the EC20 module introduced above, and the communication unit is mainly responsible for acquiring differential positioning data from a differential base station server and sending positioning longitude and latitude information, terminal state information, terminal attitude information and terminal electric quantity information to an MQTT server. Local area network communication mainly refers to the WIFI network, and the WIFI function is then realized by NF3303 module, and this module has integrated WIFI and Bluetooth transmission function by taiwan ann rich technology development, can be for other equipment transmission location longitude and latitude information such as handheld terminal of this terminal of connection, terminal state information, terminal gesture information and terminal electric quantity information data.

Specifically, the EC20 module needs to be externally connected with a SIM card and a 4G antenna to implement 4G network access. In order to reduce the volume of a finished terminal product, a NanoSIM card seat occupying the smallest area of a single board is selected, and the SIM card seat is connected with the EC20 module through a USIM interface. The 4G antenna adopts a built-in PCB antenna, and the interface between the antenna and the single board is an IPEX-I interface. The NF3303 module is connected with the EC20 module through SDIO interface, PCM interface, UART interface and several GPIO pins. The WIFI function of the NF3303 module mainly exchanges data with the EC20 module through an SDIO interface, and the Bluetooth function mainly exchanges data through a PCM interface and a UART interface. In the high-precision positioning terminal, only the WIFI communication function of the NF3303 module is used, and the Bluetooth function of the NF3303 module is not used.

As shown in fig. 4, the high-precision positioning unit is mainly used for providing a high-precision positioning signal, and when the positioning signal is good and is within the effective range of the differential base station, the high-precision positioning unit realizes a high-precision positioning function with a precision of 30 cm. The high-precision positioning unit uses an Ublox ZED-F9P high-precision positioning module, and the GNSS of the module supports positioning modules of GPS, GLONASS, beiDou, galieo and QZSS positioning systems. GNSS Bands support L1C/A, L2C, L1OF, L2OF, E1B/C, E5B, B1I, and B2I, and support concurrent GNSS. The module hardware interface supports UART, USB, SPI and DDC, the power supply range is 2.7V-3.6V, the working temperature range is-40 ℃ to 80 ℃, the volume is 17.0mm x 22.0mm x 2.4mm, and the design idea of small volume miniaturization of the high-precision positioning terminal is met. The high-precision positioning module performs data interaction with the main control unit through a UART protocol, acquires satellite positioning data through the antenna 14, and performs calibration according to differential positioning data returned by the main control unit to obtain high-precision positioning data. In addition, the high-precision positioning unit is also reserved with a MicroUSB interface for connecting a PC. Preferably, the antenna 14 is an active GNSS antenna HX-CH6601A, the antenna is a three-system six-frequency antenna, and the antenna is a handset antenna covering GPS L1/L2, GLONASS L1/L2, and BDS B1/B2, and can be used in the industries of surveying, mapping, navigation scheduling, and the like.

As shown in fig. 5, the attitude detection unit is used for attitude detection of the high-precision positioning terminal, and the attitude detection unit uses an accelerometer chip LIS3DH of ST corporation, which is a low-power-consumption and high-performance three-axis linear accelerometer and can output acceleration data through an IIC interface or an SPI interface. The LIS3DH adopts an IIC interface to be connected with the main control unit (namely the EC20 module), compared with an SPI interface, the IIC interface can effectively reduce the pin occupation of the EC20 module, thereby solving the problem that the pin resource of the main control unit is limited. And an INT1 pin of two interrupt pins of the LIS3DH is connected to a starting pin of the EC20 through a triode and used for waking up equipment in a sleep mode, and an INT2 pin of the two interrupt pins is connected to a GPIO pin of the EC20 module and used as a standby signal. The LIS3DH also contains a 3-way ADC function for sampling the power on board.

As shown in fig. 6, the power management unit is connected to a lithium battery to provide power for other units of the high-precision positioning terminal, where the full-charge voltage of the lithium battery is 4.2V, the nominal capacity is 3000mAh, the maximum discharge current is 3000mA, the standard charge current is 600mA, and the fast charge current is 1500mA. The power management unit comprises a lithium battery charging circuit, a lithium battery electric quantity monitoring circuit, a lithium battery distribution circuit and a power supply voltage monitoring circuit. The lithium battery charging circuit adopts an LTC4001 chip produced by ADI company, the floating charging voltage is 4.2V, the lithium battery charging circuit is suitable for charging of a single lithium battery, the input voltage range is 4V-5.5V, the maximum charging current is set to be 1.5A, and two charging modes of solar charging and Type-C interface charging are supported. In the actual circuit design, after the solar panel output power supply and the Type-C interface power supply are connected in parallel through two SS34 Schottky diodes, the solar panel output power supply and the Type-C interface power supply are used as an input power supply of the LTC 4001. The lithium battery power monitoring circuit adopts an LTC2942 chip produced by ADI company, the chip has the characteristics of simple peripheral circuit, high measurement precision and the like, and the internal integrated ADC can collect the battery voltage. The monitoring data of the LTC2942 is output in a digital quantity form, and an interface is an IIC interface. The LTC2942 needs to be externally provided with a current sampling resistor, and in a high-precision positioning terminal, a 1206-packaged 0.008-ohm resistor is used as the current sampling resistor. The LTC2942 is connected with the EC20 module through an IIC interface, and is mounted on the same IIC bus with an LIS3DH chip of the attitude detection unit. Since the high level of the LTC2942 for the IIC interface requires 0.7Vsense, i.e. 0.7 times of the battery voltage, and the IIC interface levels of the EC20 module and the LIS3DH are both 1.8V, it is necessary to design a level conversion circuit. The level conversion circuit is built by using TXS0102 chips of TI company, the power supply of the low-voltage end of the level conversion circuit is 1.8V, and the power supply of the high-voltage side is battery voltage. The lithium battery distribution circuit comprises a TPS63000 voltage conversion chip, a LP5912-1.8 voltage conversion chip and a LP5912-3.3 voltage conversion chip, wherein the TPS63000 voltage conversion chip outputs 3.3V voltage to supply power for an NF3303 module, and the LP5912-1.8 voltage conversion chip outputs 1.8V voltage to supply power for an accelerometer chip LIS3 DH; the LP5912-3.3 voltage conversion chip outputs 3.3V voltage to supply power for the Ublox ZED-F9P high-precision positioning module; the lithium battery directly supplies power to the EC20 module. The power supply voltage monitoring circuit monitors six power supply voltages on a board, the monitored power supply voltages include VBAT, VIN, VCC _1V8, V3V3_ FC20, RF _3V3 and VDD _ EXT, the VBAT voltage monitoring can be realized through an ADC function of LTC2942 or can be realized through an ADC pin CBC in an EC20 module, the VIN (input voltage of LTC 4001) and VCC _1V8 voltage monitoring are realized through two ADC pins reserved outside the EC20 module, and the V3V3_ FC20, RF _3V3 and VDD _ EXT (1.8V power supply output outside the EC20 module) three voltage monitoring are sampled through three ADC pins of an LIS3DH.

The attribute setting unit mainly realizes the state attribute setting and the indicator light display of the high-precision positioning terminal through four keys and four indicator lights. The keys are realized by using an FPC socket and a film key, four keys are arranged on the film key, one key is a power on/off key 9, two selection keys 10 and a confirmation key 11 are used for setting the state attribute of the high-precision positioning terminal, and the film key is also provided with a reserved key 12 which is temporarily idle. The EC20 module controls the four indicating lamps 13 through GPIO pins, and different attribute states of the high-precision positioning terminal are displayed through the combination of the four indicating lamps 13.

The high-precision positioning terminal state attributes include, but are not limited to, state attributes such as a job board, a lock board, a speed limit T board, a speed limit O board, a speed limit place T board, a speed limit place I board, a speed limit terminal-board and a stop board, and when the high-precision positioning terminal is used, the state attributes are required to be set according to actual conditions.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Finally, it is to be noted that: the above description is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims (10)

1. A high-precision positioning terminal for a railway protection board is fixedly installed on the protection board and is characterized by comprising a common mode shell, wherein a lithium battery is installed on the bottom surface inside the common mode shell, a circuit board is fixed above the lithium battery, and a hardware circuit is arranged on the circuit board and comprises a main control unit, and a high-precision positioning unit, an attribute setting unit, a posture detection unit, a communication unit and a power management unit which are respectively connected with the main control unit; the high-precision positioning unit is used for providing a high-precision positioning signal; the main control unit is used as a control and operation center and is responsible for scheduling and assisting the work of other units; the attribute setting unit is used for setting and displaying the state attribute of the high-precision positioning terminal; the attitude detection unit is used for detecting the attitude of the high-precision positioning terminal; the power management unit is connected with the lithium battery and provides power for other units; the communication unit is used for communicating the high-precision positioning terminal with the server and the handheld terminal.

2. The high-precision positioning terminal for the railway protection plate as claimed in claim 1, wherein the main control unit adopts an EC20CEFRG module, the EC20CEFRG module is a 4G module, and a CPU is integrated inside the EC module.

3. The high-precision positioning terminal for the railway protection board as claimed in claim 2, wherein the communication unit is divided into a public network communication function and a local area network communication function, the public network communication function is selected by using an EC20CEFRG module, is shared by the main control unit, and is responsible for acquiring differential positioning data from the differential base station server and sending positioning longitude and latitude information, terminal state information, terminal attitude information and terminal electric quantity information to the MQTT server; and the local area network communication function model selection uses an NF3303 module to establish a WIFI network hotspot for the access of the handheld terminal.

4. The high-precision positioning terminal for the railway protection plate as claimed in claim 3, wherein the high-precision positioning unit uses an Ublox ZED-F9P high-precision positioning module, communicates with the main control unit through UART protocol, acquires satellite positioning data through an antenna, and performs calibration according to differential positioning data returned by the main control unit to obtain high-precision positioning data; and the Ublox ZED-F9P high-precision positioning module is externally connected with a MicroUSB interface as a debugging interface.

5. The high-precision positioning terminal for the railway protection plate as claimed in claim 4, wherein the antenna is an active GNSS antenna HX-CH6601A.

6. The high-precision positioning terminal for the railway protection plate as claimed in claim 1, wherein the attribute setting unit comprises four keys and four indicator lights arranged below the front face of the common mode housing, the four keys comprise a switch key, two selection keys and a confirmation key for setting the state attribute of the high-precision positioning terminal, and a reservation key for showing different attribute states of the high-precision positioning terminal through the combination of the four indicator lights.

7. The high-precision positioning terminal for the railway protection plate as claimed in claim 6, wherein the high-precision positioning terminal state attributes comprise a job plate, a lock plate, a speed limit T plate, a speed limit O plate, a speed limit place T plate, a speed limit place I plate, a speed limit terminal-plate and a stop plate.

8. The high-precision positioning terminal for the railway protection plate as claimed in claim 4, wherein the attitude detection unit uses an accelerometer chip LIS3DH.

9. The high-precision positioning terminal for the railway protection plate as claimed in claim 8, wherein the power management unit comprises a lithium battery charging circuit, a lithium battery capacity monitoring circuit and a lithium battery distribution circuit; the lithium battery charging circuit adopts an LTC4001 chip to support solar charging and Type-C interface charging, the lithium battery electric quantity monitoring circuit adopts an LTC2942 chip, the lithium battery distribution circuit comprises a TPS63000 voltage conversion chip, an LP5912-1.8 voltage conversion chip and an LP5912-3.3 voltage conversion chip, the TPS63000 voltage conversion chip outputs 3.3V voltage to supply power for an NF3303 module, and the LP5912-1.8 voltage conversion chip outputs 1.8V voltage to supply power for an accelerometer chip LIS3 DH; the LP5912-3.3 voltage conversion chip outputs 3.3V voltage to supply power for the Ublox ZED-F9P high-precision positioning module; the lithium battery directly supplies power for the EC20CEFRG module.

10. The high-precision positioning terminal for the railway protective board as claimed in claim 9, wherein a Type-C interface is arranged at the bottom end of the common mode casing, and a solar panel is fixedly mounted above the front face of the common mode casing.

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