Construction protection system for UWB positioning

Abstract

The utility model belongs to the technical field of railway construction operation protection, and particularly relates to a UWB positioning construction protection system, which comprises a UWB base station and a UWB label, and is characterized in that the UWB base station comprises a control module, a positioning module, a communication module and a power supply module, the control module receives label positioning information transmitted by the UWB label through the positioning module and receives base station high-precision positioning information, and uploads the label positioning information and the base station high-precision positioning information to the data server through the communication module; the power supply module provides a working power supply for the whole UWB base station; the UWB tag comprises an MCU chip, a UWB module, a UWB antenna and a power supply unit, and the MCU chip controls the tag positioning information of the UWB module to be sent to the UWB base station through the UWB antenna; the power supply unit provides a working power supply for the UWB tag. According to the utility model, accurate positioning of constructors or equipment can be realized, and intelligent management is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway construction operation protection, and specifically relates to a UWB-based construction protection system. Background Art

[0002] The construction protection system is mainly used to monitor outdoor construction sites at irregular locations and times in different application scenarios, accurately locate the construction scope, and determine the location of construction personnel in real time. It also conducts intelligent management such as positioning construction personnel and construction scope and intrusion detection.

[0003] In the traditional railway construction protection system, the location of construction safety protection signs can only be confirmed by on-site inspection by construction personnel. Therefore, whether a specific railway construction protection is compliant and in place depends entirely on the experience and sense of responsibility of the construction personnel, which makes railway construction protection a great safety hazard. In addition, the remote information management system and on-site protection personnel cannot obtain the location information of construction personnel in real time, and cannot have a comprehensive, timely and accurate grasp of the construction site. Summary of the invention

[0004] The purpose of the utility model is to address the problems existing in the prior art and to propose a UWB-based construction protection system that can achieve accurate positioning of construction personnel or equipment, which is beneficial to intelligent management.

[0005] To achieve the above purpose, the technical solution adopted is:

[0006] A UWB-based construction protection system includes a UWB base station, a UWB tag, and a data server; the UWB base station is deployed around a construction site, and construction personnel or equipment carry UWB tags. The UWB tags communicate with the UWB base station through UWB, and the UWB base station communicates with a differential server to obtain differential positioning data to correct the base station position; the UWB base station uploads positioning information to the data server via a wireless network, and the data server processes the received information and displays it on a client, and sends the information to a mobile terminal of a protection worker at the same time;

[0007] The UWB base station includes a control module and a positioning module, a communication module and a power module connected to the control module. The control module receives the tag positioning information transmitted by the UWB tag and the high-precision positioning information of the base station through the positioning module, and uploads it to the data server through the communication module; the power module provides working power for the entire UWB base station;

[0008] The UWB tag includes an MCU chip, a UWB module, a UWB antenna and a power supply unit. The MCU chip controls the tag positioning information of the UWB module to be sent to the UWB base station through the UWB antenna; the power supply unit provides working power for the UWB tag.

[0009] According to the UWB-positioned construction protection system of the present invention, further, the control module of the UWB base station adopts an A8 core board.

[0010] According to the UWB positioning construction protection system of the utility model, further, the positioning module of the UWB base station includes a 407 single-chip microcomputer, and the 407 single-chip microcomputer is connected to the A8 core board through a PHY chip.

[0011] According to the UWB positioning construction protection system of the utility model, further, the positioning module of the UWB base station also includes a differential positioning module, a four-way gyro antenna, a UWB positioning module and a UWB antenna. The differential positioning module communicates with the A8 core board through the UART serial port, and the differential positioning module adopts the ZED-F9P module of UBLOX; the UWB positioning module is connected to the 407 single-chip microcomputer through the SPI interface, and the UWB positioning module adopts the DWM1000 chip.

[0012] According to the UWB positioning construction protection system of the utility model, further, the positioning module of the UWB base station also includes a first power conversion submodule, the first power conversion submodule includes a DC-DC step-down chip LMR14020, which converts the 12V voltage into 3.3V to power the differential positioning module and the UWB positioning module.

[0013] According to the UWB positioning construction protection system of the utility model, further, the communication module of the UWB base station includes a 4G module and a WIFI module, the 4G module adopts Huawei ME909S-821A, and the WIFI module model is BL-M8821CU1; the 4G module and the WIFI module communicate with the USB interface of the A8 core board.

[0014] According to the UWB positioning construction protection system of the utility model, further, the communication module of the UWB base station also includes a second power conversion sub-module, the second power conversion sub-module includes a buck regulator LMR14030, which converts the 12V voltage into a 3.8V voltage to power the 4G module; the second power conversion sub-module also includes a buck regulator LM14020, which converts the 12V voltage into a 3.3V voltage to power the WIFI module.

[0015] According to the UWB-positioned construction protection system of the utility model, further, the power module of the UWB base station adopts a 12V lithium battery.

[0016] According to the UWB-positioned construction protection system of the utility model, further, the MCU chip of the UWB tag adopts the STM32L071 single-chip microcomputer, and the UWB module adopts the DWM1000 chip.

[0017] According to the UWB-positioned construction protection system of the utility model, further, the power supply unit of the UWB tag adopts a 5V lithium battery.

[0018] The beneficial effects achieved by adopting the above technical solution are:

[0019] The UWB-based construction protection system of the present invention realizes real-time positioning of construction personnel or equipment by performing UWB communication with UWB base stations through UWB tags, and uploads the positioning information to the server for processing, which is then displayed on the client and the protection staff's tablet, so that on-site protection staff and indoor management personnel can grasp the precise location of each construction staff and effectively ensure the safety of the construction staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. The drawings are only used to show some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0021] Figure 1 It is a principle block diagram of the UWB-based construction protection system of an embodiment of the utility model;

[0022] Figure 2 It is a principle block diagram of a UWB base station of an embodiment of the utility model;

[0023] Figure 3 It is a principle block diagram of a control module of a UWB base station according to an embodiment of the utility model;

[0024] Figure 4 It is a principle block diagram of a positioning module of a UWB base station according to an embodiment of the utility model;

[0025] Figure 5 It is a principle block diagram of a communication module of a UWB base station according to an embodiment of the utility model;

[0026] Figure 6 It is a principle block diagram of a power module of a UWB base station according to an embodiment of the utility model;

[0027] Figure 7 It is a principle block diagram of a UWB tag according to an embodiment of the utility model;

[0028] Figure 8 This is an example diagram of the UWB base station circuit board layout of an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings of the specific embodiments of the utility model to clearly and completely describe the exemplary scheme of the utility model. Unless otherwise defined, the technical terms or scientific terms used in the utility model should be the common meanings understood by people with ordinary skills in the relevant field.

[0030] like Figure 1 As shown, the UWB positioning construction protection system of this embodiment includes a UWB base station, a UWB tag and a data server. The UWB base station is deployed around the construction site. This example uses four base stations arranged at four corners. Construction personnel or equipment carry UWB tags, and the UWB tags communicate with the UWB base stations by UWB to determine the location information of the tags relative to the base stations. The UWB base stations communicate with the differential servers to obtain differential positioning data to correct the base station positions. The UWB base stations upload the positioning information to the data server via the wireless network. The data server processes the received information and displays it on the client, and sends the information to the tablet of the guard at the same time.

[0031] (1) UWB base station

[0032] like Figure 2 As shown, the UWB base station includes a control module (also called a control board) and a positioning module (also called a positioning board), a communication module (also called a communication board) and a power module connected to the control module. The control module receives the tag positioning information transmitted by the UWB tag and the high-precision positioning information of the base station through the positioning module, and uploads it to the data server through the communication module. The power module provides working power for the entire UWB base station.

[0033] 1.1. Control module

[0034] like Figure 3 As shown, the control module uses the A8 core board, and the control function is realized through the communication of each module by the A8 core board. The communication board interface of the A8 core board includes two USB interfaces and 9 GPIO interfaces. The two USB interfaces communicate with the 4G module and the WIFI module respectively; the 9 GPIO interfaces perform power on and off and reset control on the 4G module and the WIFI module.

[0035] The high-precision positioning information of the base station and the UWB tag are obtained through the positioning board interface of the A8 core board, and the differential positioning module and the UWB positioning module are controlled. It includes a 100M network interface, which is connected to the 407 microcontroller of the positioning board through a network transformer to obtain the UWB tag positioning information. It includes a UART interface, through which the high-precision positioning information of the base station is obtained. It includes 5 GPIOs for power on and off and reset control of the differential positioning module and the UWB positioning module. One SPI interface is reserved for expansion.

[0036] The temperature is collected through the SPI interface of the A8 core board, and the RTC clock and battery power information are obtained through the IIC interface of the A8 core board. In addition, the power on / off control interface, forced reset button interface and indicator light interface are designed to realize power on / off, forced reset and operation indication.

[0037] 1.2 Positioning module

[0038] like Figure 4 As shown, the positioning module includes a 407 single-chip microcomputer, a differential positioning module, a four-way gyro antenna, a UWB positioning module, a UWB antenna and a first power conversion submodule. The UWB positioning module is connected to the 407 single-chip microcomputer through an SPI interface. The 407 single-chip microcomputer is connected to the PHY chip 8720 through an RMII interface and then to the A8 core board through an isolation network transformer. It can quickly transmit data through the network port and reduce the delay of data transmission.

[0039] The differential positioning module uses the UBLOX ZED-F9P module, and is matched with the MARUWA four-way gyro antenna MHC-1568A to receive differential positioning data to achieve high-precision positioning of the base station. The differential positioning module communicates with the A8 core board through the UART serial port, and a matching resistor is connected in series in the serial port to ensure stable and reliable communication. The four-way gyro antenna MHC-1568A has wide directivity, strong anti-interference radio waves, and is not easily affected by the human body. By connecting resistors and inductors in series and capacitors in parallel to the power supply of the antenna, the ripple of the power supply is effectively filtered out, the interference with the radio frequency signal is reduced, and the ESD electrostatic protection tube is added to the antenna to effectively prevent static electricity from damaging the antenna.

[0040] The UWB positioning module uses the decaWave DWM1000 chip, which complies with the IEEE 802.15.4-2011 ultra-wideband standard, supports the RF band from 3.5GHz to 4.2GHz, and has the advantages of high accuracy, low power consumption, and strong resistance to multipath fading.

[0041] The power supply of the positioning board is provided by the connector pin of the control board with 12V power, and then converted into the power supply of the differential positioning module and the UWB positioning module through the DC-DC step-down chip. The first power conversion submodule is turned on through the GPIO control of the A8 core board, low level enables, and high level turns off the power supply.

[0042] The peak current of the differential positioning module is 130mA. The design selects the DC-DC step-down chip LMR14020 (2A output) to take power from 12V and convert it into 3.3V power to provide working power for the differential positioning module ZED-F9P.

[0043] The UWB positioning module receives a power supply current of 160mA and transmits a power supply current of 140mA. The design selects the DC-DC step-down chip LM14020 (2A output) to take power from 12V and convert it into a 3.3V power supply to provide a stable working power supply for the UWB positioning module DWM1000.

[0044] 1.3 Communication module

[0045] like Figure 5 As shown, the communication module includes a 4G module, a WIFI module and a second power conversion submodule.

[0046] The 4G module uses Huawei ME909S-821A, which supports China Unicom 4G, 3G, 2G, China Mobile 4G, 2G and China Telecom 4G. The power on / off and reset of the 4G module need to be controlled by the GPIO of the A8 core board. The power enable pin of the 4G module is controlled by the GPIO of the A8 core board. A high level enables and a low level turns off the power. The 4G module communicates with the USB0 interface of the A8 core board.

[0047] The WIFI module model is BL-M8821CU1, which supports IEEE 802.11a / b / g / n / ac standards and operates in the frequency band of 2.412GHz~2.4835GHz / 5.18GHz~5.835GHz. The power enable pin of the WIFI module is controlled by the GPIO of the A8 core board. A high level enables the power and a low level turns off the power. The WIFI module communicates with the USB1 interface of the A8 core board.

[0048] Second power conversion submodule: The power supply of the communication board is 12V power provided by the control board through the connector, which is converted into power supply for the 4G module and WIFI module respectively through two step-down regulators.

[0049] The maximum current of the 4G module can reach 2.75A when dialing or the signal is not good. The design selects the buck regulator LMR14030 (3.5A output) to take power from 12V and convert it into 3.8V power to provide working power for the 4G module ME909S-821A. The WIFI module selects the buck regulator LM14020 (2A output) to take power from 12V and convert it into 3.3V power to provide working power for the WIFI module BL-M8821CU1.

[0050] The communication board and the control board use 2*10pin-2.54 spacing pins to achieve inter-board connection, including 9 GPIO pins and two high-speed USB2.0 interfaces. One USB interface communicates with the 4G module for data transmission and reception, and the other is used for communication with the WIFI module for data transmission and reception. GPIO is used to control the power module to start, turn on and off the module, reset, etc.

[0051] 1.4 Power Module

[0052] like Figure 6 As shown, the power module uses a 12V lithium battery. The battery can be charged by connecting a power adapter, and power management is performed through the battery interface.

[0053] (2) UWB tag

[0054] like Figure 7 As shown, the UWB tag includes an MCU chip, a UWB module, a UWB antenna and a power supply unit. The MCU chip controls the tag positioning information of the UWB module to be sent to the UWB base station through the UWB antenna, and the power supply unit provides working power for the UWB tag.

[0055] Preferably, the UWB module adopts the DWM1000 chip to realize UWB positioning; the measured communication distance can reach 400m; it supports TWR and TDOA positioning algorithms, and the positioning accuracy is less than 10cm; it supports a data transmission rate of 6.8Mbps.

[0056] The MCU chip uses the STM32L071 microcontroller, and the low-power STM32L071 microcontroller is used to configure the UWB module.

[0057] UWB tags have strict requirements on volume, so the MAX2001-CA module equipped with a ceramic antenna is selected. Compared with the MAX2001 module with SMA and IPEX interfaces that can be connected to an external antenna, the ceramic antenna has a smaller gain.

[0058] The power supply unit uses a 5V lithium battery to power the UWB tag. The selected lithium battery specification model is: HLP-502030-300mAh.

[0059] The UWB base station uses the bottom outlet, and the connector faces downward during installation to prevent rain and snow from invading the inside of the device. The device is fixed on the top of the column or tripod with a clamp. Figure 8 As shown, the UWB base station circuit board adopts a stacked design, with the control board base plate at the bottom, the control board installed on the top, and the communication board and positioning board placed on the top.

[0060] The preferred embodiments for implementing the present invention have been described in detail above, but it should be understood that the role of these embodiments is only to exemplify, and is not intended to limit the scope, applicability or configuration of the present invention in any way. The protection scope of the present invention is defined by the attached claims and their equivalents. A person of ordinary skill in the art can make many changes to the above embodiments under the guidance of the present invention, and these changes all fall within the protection scope of the present invention.

Claims

1. A UWB-based construction protection system, characterized in that: It includes a UWB base station, a UWB tag and a data server; the UWB base station is deployed around the construction site, and the construction personnel or equipment carry UWB tags. The UWB tags communicate with the UWB base station via UWB, and the UWB base station communicates with the differential server to obtain differential positioning data to correct the base station position; the UWB base station uploads the positioning information to the data server via a wireless network, and the data server processes the received information and displays it on the client, and sends the information to the mobile terminal of the protection personnel; The UWB base station includes a control module and a positioning module, a communication module and a power module connected to the control module. The control module receives the tag positioning information transmitted by the UWB tag and the high-precision positioning information of the base station through the positioning module, and uploads it to the data server through the communication module; the power module provides working power for the entire UWB base station; The UWB tag includes an MCU chip, a UWB module, a UWB antenna and a power supply unit. The MCU chip controls the tag positioning information of the UWB module to be sent to the UWB base station through the UWB antenna; the power supply unit provides working power for the UWB tag.

2. The UWB positioning construction protection system according to claim 1, characterized in that: The control module of the UWB base station adopts the A8 core board.

3. The UWB positioning construction protection system according to claim 2 is characterized in that: The positioning module of the UWB base station includes a 407 single chip microcomputer, and the 407 single chip microcomputer is connected to the A8 core board via a PHY chip.

4. The UWB positioning construction protection system according to claim 3, characterized in that: The positioning module of the UWB base station also includes a differential positioning module, a four-way gyro antenna, a UWB positioning module and a UWB antenna. The differential positioning module communicates with the A8 core board through the UART serial port, and the differential positioning module adopts the ZED-F9P module of UBLOX; the UWB positioning module is connected to the 407 single-chip microcomputer through the SPI interface, and the UWB positioning module adopts the DWM1000 chip.

5. The UWB-based construction protection system according to claim 4, characterized in that: The positioning module of the UWB base station also includes a first power conversion submodule, which includes a DC-DC step-down chip LMR14020, which converts 12V voltage into 3.3V to power the differential positioning module and the UWB positioning module.

6. The UWB positioning construction protection system according to claim 2, characterized in that: The communication module of the UWB base station includes a 4G module and a WIFI module. The 4G module adopts Huawei ME909S-821A, and the WIFI module model is BL-M8821CU1; the 4G module and the WIFI module communicate with the USB interface of the A8 core board.

7. The UWB positioning construction protection system according to claim 6, characterized in that: The communication module of the UWB base station also includes a second power conversion submodule, which includes a buck regulator LMR14030, which converts the 12V voltage into a 3.8V voltage to power the 4G module; the second power conversion submodule also includes a buck regulator LM14020, which converts the 12V voltage into a 3.3V voltage to power the WIFI module.

8. The UWB positioning construction protection system according to claim 1, characterized in that: The power module of the UWB base station adopts a 12V lithium battery.

9. The UWB-based construction protection system according to claim 1, characterized in that: The MCU chip of the UWB tag adopts the STM32L071 single-chip microcomputer, and the UWB module adopts the DWM1000 chip.

10. The UWB-based construction protection system according to claim 9, characterized in that: The power supply unit of the UWB tag adopts a 5V lithium battery.

Images