阅读说明：本技术 基于全球卫星定位导航系统的隧道定位装置 (Tunnel positioning device based on global satellite positioning navigation system ) 是由 陈建平 刘鑫 于 2019-10-29 设计创作，主要内容包括：本发明提供了一种基于全球卫星定位导航系统的隧道定位装置,其特征在于：包括与卫GNSS卫星连接的GNSS接收机,GNSS接收机通过GNSS模拟器连接到GNSS转发控制器,GNSS转发控制器通过光纤与隧道内的若干GNSS转发器串联。GNSS接收机接收卫星的信号,GNSS模拟器模拟产生各GNSS转发器位置的卫星定位数据,通过GNSS控制器下发给各GNSS转发器,隧道内GNSS转发器将其转换为标准的GNSS卫星信号,列车和定位终端GNSS接收机收到模拟卫星信号,实现隧道内列车和人员的定位。本发明通过模拟卫星定位信号,实现列车、手持终端在隧道内依靠北斗、GPS卫星定位,不需要更改既有车辆和人员的卫星定位终端,为铁路GNSS卫星定位系统全域覆盖定位提供一种有效手段。(The invention provides a tunnel positioning device based on a global satellite positioning navigation system, which is characterized in that: the GNSS receiver is connected to a GNSS forwarding controller through a GNSS simulator, and the GNSS forwarding controller is connected with a plurality of GNSS repeaters in a tunnel in series through optical fibers. The GNSS receiver receives signals of satellites, the GNSS simulator simulates to generate satellite positioning data of the positions of the GNSS repeaters, the satellite positioning data are issued to the GNSS repeaters through the GNSS controller, the GNSS repeaters in the tunnel convert the signals into standard GNSS satellite signals, and the GNSS receiver of the train and the positioning terminal receives the simulated satellite signals to realize positioning of the train and personnel in the tunnel. According to the invention, through simulating the satellite positioning signal, the train and the handheld terminal are positioned by means of Beidou and GPS satellites in the tunnel, the satellite positioning terminals of the existing vehicles and personnel are not required to be changed, and an effective means is provided for the global coverage positioning of the railway GNSS satellite positioning system.)

1. A tunnel positioning device based on a global satellite positioning navigation system is characterized in that: including the GNSS receiver who is connected with the satellite GNSS satellite, the GNSS receiver is connected to GNSS through the GNSS simulator and forwards the controller, GNSS forwards the controller and establishes ties with a plurality of GNSS repeaters in the tunnel through optic fibre, the GNSS receiver receives the signal of satellite, obtain accurate positioning, and locate data information, the GNSS simulator is according to the information that the receiver provided, the simulation produces the satellite positioning data of each GNSS repeater position, issue each GNSS repeater through the GNSS controller, the GNSS repeater receives the satellite positioning data that belongs to oneself in the tunnel, convert the standard GNSS satellite signal into, train and positioning terminal GNSS receiver receive the simulated satellite signal of repeater transmission, realize the location of train and personnel in the tunnel.

2. The global positioning satellite navigation system based tunnel positioning device of claim 1, wherein: each GNSS transponder is connected with a distance measuring device such as a radar, the distance measuring devices such as the radar measure the distance from the train to the GNSS transponder, the real-time coordinate of the train is calculated according to the fixed coordinate of the GNSS transponder and the fixed railway line, the actual coordinate data of the train are sent to the GNSS simulator by the transponders, the GNSS satellite positioning correction data are calculated by the simulator and sent to the GNSS transponder of the tunnel, and the train receives the satellite positioning signals corrected in real time, so that the train can be accurately positioned in the tunnel.

3. A global positioning satellite navigation system based tunnel positioning device according to claim 1 or 2, wherein: the output frequency of the GNSS repeater is BD2-BI 1561.098 MHz; GPS-L11575.42MHz; the signal precision is pseudo range: ± 0.1m, speed: 0.01 m/s; the signal quality is less than or equal to minus 40dB of stray; harmonic less than-60 dB; phase noise: < -75 dBc; the number of channels is 8.

Technical Field

The invention relates to the field of tunnel positioning systems, in particular to a tunnel positioning device based on a global satellite positioning navigation system.

Background

The global navigation satellite system GNSS (including chinese beidou, american GPS, russian GLONASS, etc.) is widely used in railway and rail transit industries, and next-generation train control, position-based train scheduling command system, and railway construction and maintenance system based on GNSS satellite positioning all need support of satellite positioning. Because satellite positioning signals can not be received in the tunnel and indoor station area, the conventional indoor positioning technologies such as Bluetooth, WiFi, UWB and the like and the GNSS satellite positioning technology are relatively independent at present, and the existing satellite positioning (Beidou and GPS) terminal can not be directly positioned in the tunnel and the indoor, so that the elbow-control Beidou can be popularized and applied in railway and rail transit.

Disclosure of Invention

The invention provides a tunnel positioning device based on a global satellite positioning navigation system, which aims to solve the problems in the prior art, realizes the positioning of trains and handheld terminals in tunnels by means of Beidou and GPS satellites through simulating satellite positioning signals, does not need to change the satellite positioning terminals of the existing vehicles and personnel, and provides an effective means for the global coverage positioning of a railway GNSS satellite positioning system.

The invention comprises a GNSS receiver connected with a satellite GNSS satellite, wherein the GNSS receiver is connected with a GNSS forwarding controller through a GNSS simulator, the GNSS forwarding controller is connected with a plurality of GNSS repeaters in a tunnel in series through optical fibers, the GNSS receiver receives signals of the satellite to acquire accurate positioning and positioning data information, the GNSS simulator simulates and generates satellite positioning data of the positions of the GNSS repeaters according to the information provided by the receiver, the satellite positioning data are issued to the GNSS repeaters through the GNSS controller, the GNSS repeaters in the tunnel receive satellite positioning data of the GNSS receiver and convert the satellite positioning data into standard GNSS satellite signals, and the GNSS receiver of a train and a positioning terminal receives the simulated satellite signals transmitted by the repeaters to realize the positioning of the train and personnel in the tunnel.

In order to improve the positioning precision of the train in the tunnel, each GNSS transponder is connected with a distance measuring device such as a radar, the distance measuring device such as the radar measures the distance from the train to the GNSS transponder, the real-time coordinate of the train is calculated according to the fixed coordinate of the GNSS transponder and the fixed railway line, the transponder sends the actual coordinate data of the train to the GNSS simulator, the simulator calculates the GNSS satellite positioning correction data and sends the GNSS satellite positioning correction data to the GNSS transponder of the tunnel, at the moment, the train receives the satellite positioning signals corrected in real time, the accurate positioning of the train in the tunnel is realized, and the positioning precision can be controlled within 10 meters.

In a further improvement, the output frequency of the GNSS repeater is BD2-BI 1561.098 MHz; GPS-L11575.42MHz; the signal precision is pseudo range: ± 0.1m, speed: 0.01 m/s; the signal quality is less than or equal to minus 40dB of stray; harmonic less than-60 dB; phase noise: < -75 dBc; the number of channels is 8.

The invention has the beneficial effects that:

1. and the Beidou BDS and GPS signal coverage and terminal positioning in the tunnel are realized.

2. The BDS/GPS signals in the tunnel and the outside of the tunnel are kept synchronous, and seamless switching and positioning of vehicles and personnel after entering the tunnel are realized.

3. The GNSS transponder in the tunnel provides simulated satellite positioning signals for the coverage area of the GNSS transponder according to the installation position.

4. The repeater can provide BDS-B1 and GPS-L1 double frequency points at the same time, and each frequency point can provide more than 6 paths of analog satellite signals.

5. And changing the positioning signal of the transponder in real time according to the distance of the object detected by the radar, so that the positioning data of the vehicle or the personnel is consistent with the actual position data of the object, and the error is controlled within 10 meters.

6. Each repeater coverage is independently controlled, and multiple terminals can be tracked and located simultaneously.

7. Adjacent transponders should use different satellite signals to prevent multipath interference.

8. And the automatic calibration function is used for uploading error information to the simulator through the monitoring station in the tunnel to automatically correct when the line, the device and the like generate positioning data deviation.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Detailed Description

The invention will be further explained with reference to the drawings.

The structure of the invention is shown in figure 1, and comprises a GNSS receiver connected with a satellite GNSS satellite, wherein the GNSS receiver is connected with a GNSS forwarding controller through a GNSS simulator, the GNSS forwarding controller is connected with a plurality of GNSS repeaters in a tunnel in series through optical fibers, the GNSS receiver receives signals of the satellite to acquire accurate positioning and positioning data information, the GNSS simulator simulates and generates satellite positioning data of the positions of the GNSS repeaters according to the information provided by the receiver, the satellite positioning data are issued to the GNSS repeaters through the GNSS controller, the GNSS repeaters in the tunnel receive satellite positioning data belonging to the GNSS receiver and convert the satellite positioning data into standard GNSS satellite signals, and the GNSS receiver of a train and a positioning terminal receives the simulated satellite signals transmitted by the repeaters to realize the positioning of the train and personnel in the tunnel.

In order to improve the positioning precision of the train in the tunnel, each GNSS transponder is connected with a distance measuring device such as a radar, the distance measuring device such as the radar measures the distance from the train to the GNSS transponder, the real-time coordinate of the train is calculated according to the fixed coordinate of the GNSS transponder and the fixed railway line, the transponder sends the actual coordinate data of the train to the GNSS simulator, the simulator calculates the GNSS satellite positioning correction data and sends the GNSS satellite positioning correction data to the GNSS transponder of the tunnel, at the moment, the train receives the satellite positioning signals corrected in real time, the accurate positioning of the train in the tunnel is realized, and the positioning precision can be controlled within 10 meters.

In a further improvement, the output frequency of the GNSS repeater is BD2-BI 1561.098 MHz; GPS-L11575.42MHz; the signal precision is pseudo range: ± 0.1m, speed: 0.01 m/s; the signal quality is less than or equal to minus 40dB of stray; harmonic less than-60 dB; phase noise: < -75 dBc; the number of channels is 8.

The technical points of the invention are as follows:

1. a group of GNSS transponders are adopted in the tunnel to restore the satellite positioning signals again, so that the train and personnel can be positioned in the tunnel through a GNSS positioning receiver;

2. the GNSS simulator can generate a plurality of simulated GNSS satellite positioning data information according to the position of the transponder, and the corresponding GNSS transponder restores the simulated GNSS satellite positioning data information into a standard satellite positioning signal;

3. the GNSS controller transmits the data generated by the GNSS simulator to each repeater in the tunnel through an optical fiber, transmits the request data of the repeaters to the GNSS simulator, and controls and manages the repeaters;

4. the position coordinates of the vehicle and the personnel are accurately measured by binding a distance measuring device such as a radar with the transponder, the coordinate information is continuously transmitted to the GNSS simulator for recalculation, and the GNSS transponder emits a continuously updated satellite positioning signal to realize the accurate positioning of the vehicle and the personnel;

5. and the GNSS monitoring station in the tunnel corrects the satellite positioning signal provided by the repeater, so that the accuracy and the safety of the positioning signal are ensured.

While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.