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Differential positioning method and system, terminal and medium

A differential positioning and preliminary positioning technology, applied in the field of information processing, can solve problems such as large positioning drift, low positioning accuracy, and drifting into the rails.

Inactive Publication Date: 2019-05-31
辽宁北斗卫星导航平台有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary inspection terminals only use GPS single-point positioning technology. Since railway information is important national information, railway inspections cannot rely solely on GPS for positioning
Moreover, the GPS single-point positioning technology has defects such as low positioning accuracy and the inability to accurately determine the position of the railway track.
[0003] Moreover, in areas such as stations and roads, ordinary GPS positioning cannot achieve good positioning results due to the presence of canopy and other shelters, and there is a problem of large positioning drift, even drifting into the rails

Method used

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  • Differential positioning method and system, terminal and medium
  • Differential positioning method and system, terminal and medium
  • Differential positioning method and system, terminal and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A differential positioning method, see figure 1 , including the following steps:

[0038] S1: receiving and screening satellite navigation signals to obtain satellite navigation screening signals;

[0039] Specifically, the method may receive satellite navigation screening signals through a satellite navigation system receiver.

[0040] Wherein, when screening satellite navigation signals, according to preset screening rules, the satellite navigation signals are screened using forecasted satellite conditions to obtain the satellite navigation screening signals. The forecasted satellite conditions include satellite navigation signals collected in the past.

[0041] Specifically, when all satellite navigation signals that do not meet the screening rules are eliminated, the remaining satellite navigation signals are defined as satellite navigation screening signals.

[0042] The preset screening rules include: when the signal strength of the satellite navigation signal ...

Embodiment 2

[0050] A differential positioning system, see figure 2 ,include:

[0051] Receiving unit: used to receive and screen satellite navigation signals to obtain satellite navigation screening signals;

[0052] Preliminary positioning unit: used to perform weighted calculations on the satellites corresponding to the satellite navigation screening signals according to the signal strength of the satellite navigation screening signals to obtain preliminary positioning information;

[0053] Filtering unit: for performing Kalman filtering on the preliminary positioning information to obtain final positioning information.

[0054] Preferably, the preliminary positioning unit is specifically used for:

[0055]According to the preset screening rules, the satellite navigation signals are screened by using the forecasted satellite conditions to obtain the satellite navigation screening signals.

[0056] Preferably, the forecasted satellite conditions include satellite navigation signals c...

Embodiment 3

[0062] a terminal, see image 3 , including a processor 801, an input device 802, an output device 803 and a memory 804, the processor 801, the input device 802, the output device 803 and the memory 804 are connected to each other through a bus 805, wherein the memory 804 is used to store computer programs , the computer program includes program instructions, and the processor 801 is configured to invoke the program instructions to execute the method described in Embodiment 1.

[0063] It should be understood that, in the embodiment of the present invention, the so-called processor 801 may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), dedicated Integrated Circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or tr...

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PUM

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Abstract

The invention provides a differential positioning method and system, a terminal and a medium. The method comprises a step of receiving and screening a satellite navigation signal to obtain a satellitenavigation screened signal, a step of performing weighting operation on a satellite corresponding to the satellite navigation screened signal according to the signal intensity of the satellite navigation screened signal to obtain preliminary positioning information, a step of performing Kalman filtering on the preliminary positioning information to obtain final positioning information. Accordingto the method, the differential mode is adopted for high-precision positioning, the positioning precision can reach 10cm or less, the positioning precision is greatly improved compared with the precision of 10m of original ordinary GPS positioning, and the requirements of railway inspection are satisfied.

Description

technical field [0001] The invention belongs to the field of information processing, and in particular relates to a differential positioning method, system, terminal and medium. Background technique [0002] Railway inspections have relatively high requirements for positioning accuracy, and it is required to be able to accurately locate railway tracks, turnouts, etc., so the positioning accuracy must not be lower than 10cm. Ordinary inspection terminals only use GPS single-point positioning technology. Since railway information is important national information, railway inspections cannot rely solely on GPS for positioning. Moreover, the GPS single-point positioning technology has defects such as low positioning accuracy and inability to accurately determine the position of the railway track. [0003] Moreover, in areas such as stations and roads, ordinary GPS positioning cannot achieve good positioning results due to the presence of canopy and other shelters, and there is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42G01S19/41
Inventor 董玉杰
Owner 辽宁北斗卫星导航平台有限公司