CN211741584U - High-precision directional terminal based on CORS system - Google Patents

Abstract

The utility model discloses a high-precision orientation terminal based on a CORS system, which belongs to a positioning terminal and comprises an outer shell, wherein a singlechip module is arranged in the outer shell, the singlechip module is respectively connected into two GPS modules through serial ports, the two GPS modules are also arranged in the outer shell, and the GPS modules are connected into respective satellite antennas through cables; the CORS differential receiving module is used for receiving CORS signals through the GPS module, analyzing an NTrip protocol to obtain CORS differential signals, transmitting the CORS differential signals to the GPS module through a serial port, and transmitting the CORS differential signals and satellite signals received through the satellite antenna to the single chip microcomputer module through the GPS module. The two GPS modules are installed in the terminal, differential positioning data resolved by the GPS modules together with satellite signals and CORS differential signals are transmitted to the single chip microcomputer module, and the single chip microcomputer receives the data and then calculates in real time to obtain the real-time azimuth angle of the base line of the centers of the two satellite antennas, so that underwater topographic measurement and hydrographic flow velocity measurement are achieved.

Description

High-precision directional terminal based on CORS system

Technical Field

The utility model relates to a directional terminal, more specifically the utility model discloses mainly relate to a directional terminal of high accuracy based on CORS system.

Background

In the process of measuring the flow of the hydrological flow velocity to the flow, instruments such as a GPS (satellite positioning system) and an ADCP (acoustic doppler flow profiler) are generally required. ADCP is the instrument and equipment that is used for measuring water body velocity of flow direction such as river course, and in specific measurement process, the single use ADCP measurement can cause very big error, and especially the flow direction has very big error, need be equipped with difference GPS and compass just can the accurate velocity of flow direction of water bodies such as river course of measurement. However, the dedicated compass is expensive and not beneficial to the operation cost control, so that research and improvement on the structure of the directional terminal are necessary.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to solve the aforesaid not enough, provide a directional terminal of high accuracy based on CORS system to it can cause very big error to expect to use ADCP to measure among the solution prior art, is equipped with special compass high price, is unfavorable for technical problem such as cost control.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a high accuracy orientation terminal based on CORS system, including the shell body, install single chip module in the shell body, single chip module inserts two GPS modules respectively through the serial ports, GPS module inserts respective satellite antenna through the cable, and the distance of two satellite antenna is greater than 1.5 meters, GPS module still inserts respective CORS difference receiving module; the CORS differential receiving module is used for receiving CORS signals through the GPS module, analyzing an NTrip protocol to obtain CORS differential signals, transmitting the CORS differential signals to the GPS module through a serial port, and transmitting the CORS differential signals and satellite signals received through the satellite antenna to the single chip microcomputer module through the GPS module.

Preferably, the further technical scheme is as follows: the shell is provided with a serial port connector, and the serial port connector is also connected to the single chip microcomputer module.

The further technical scheme is as follows: the satellite antennas are all installed on the measuring ship body.

Compared with the prior art, one of the beneficial effects of the utility model is that: through installing two GPS modules in the terminal, and will be solved the differential positioning data transmission to single chip module together by the satellite signal that the GPS module received through satellite antenna and the CORS differential signal that receives through CORS differential receiving module respectively, the real-time calculation obtains the real-time azimuth of this basic line in two satellite antenna centers after the single chip microcomputer received data to realize topographic survey under water and hydrologic flow velocity measurement, simultaneously the utility model provides a high accuracy orientation terminal based on CORS system simple structure, use cost is lower, is suitable for the popularization.

Drawings

Fig. 1 is a schematic structural diagram for explaining an embodiment of the present invention;

in the figure, 1 is an outer shell, 2 is a single chip microcomputer module, 3 is a serial port, 4 is a GPS module, 5 is a satellite antenna, 6 is a serial port connector, and 7 is a CORS differential receiving module.

Detailed Description

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

Referring to fig. 1, an embodiment of the present invention is a high-precision directional terminal based on the CORS system, including an outer shell 1, a single chip module 2 is installed in the outer shell 1, the single chip module 2 uses the ST32 single chip as a core to perform processing and operation, more importantly, at the middle end of the orientation, the single chip module 2 is respectively connected to two GPS modules 4 through two serial ports 3, the two GPS modules have substantially the same specification and model, then the two GPS modules 4 are connected to respective satellite antennas 5 through cables, and the distance between the two satellite antennas 5 is greater than 1.5 meters, and meanwhile, the GPS modules 4 are also connected to respective CORS differential receiving modules 7; the CORS differential receiving module 7 is used for receiving CORS signals through the GPS module 4, analyzing an NTrip protocol to obtain CORS differential signals, transmitting the CORS differential signals to the GPS module 4 through a serial port, and transmitting satellite signals received through the satellite antenna 5 to the single chip microcomputer module 2 through the GPS module 4. Preferably, in order to facilitate the directional terminal to output the measurement data in time, a serial port connector 6 can be additionally arranged on the outer shell 1, and the serial port connector 6 is also connected to the single chip microcomputer module 2, so that the data line is conveniently inserted through the serial port connector 6, and the single chip microcomputer module 2 is convenient to output the measurement data. Meanwhile, in order to keep the position of the satellite antenna 5 stable, the two satellite antennas 5 can be installed on the measuring ship body in use, and the distance between the two satellite antennas 5 is kept to be more than 1.5 meters moderately.

In this embodiment, two GPS modules 4 are installed in the terminal, and differential positioning data calculated by the GPS module 4 through a satellite signal received by the satellite antenna 5 and a CORS differential signal received by the CORS differential receiving module are transmitted to the single chip microcomputer module, and the single chip microcomputer receives the data and then calculates in real time to obtain a real-time azimuth angle of the baseline of the centers of the two satellite antennas, thereby realizing underwater topographic measurement and hydrographic flow rate measurement.

Referring to fig. 1, in practical use, the above embodiment of the present invention requires that the ADCP flow direction measurement is converted from the instrument coordinate-based flow direction to the azimuth angle-based flow direction. The compass can be utilized in the acquisition of azimuth the utility model discloses utilize the GPS coordinate to calculate and obtain. High accuracy of the phase differential GPS is required to obtain a high accuracy of the azimuth angle. By designing two GPS or board cards, the distance between satellite antennas of the two GPS or board cards is more than 1.5 meters, the two GPS or board cards receive satellite signals, and meanwhile, the phase difference data of the CORS system is received through the GPRS module or the 4G module, so that centimeter-level positioning is realized. The two GPS or board cards send positioning data in a $ GNGGA international standard format to the outside through RS232 serial ports. Utilize STM32 singlechip self-control a receiver, receive two GPS or integrated circuit board $ GNGGA positioning data through two serial ports in real time. After receiving the data, the single chip microcomputer analyzes longitude and latitude data under a WGS84 system from $ GNGGA positioning data, two-point coordinates X1, Y1, X2 and Y2 of centers of two satellite antennas under a WGS84 plane system are calculated according to Gaussian projection, an azimuth angle of a base line of the centers of the two satellite antennas is obtained through calculation of center coordinates of the two antennas, and a real-time azimuth angle of the base line of the centers of the two satellite antennas is obtained through real-time calculation. And then converting the real-time calculated azimuth into a compass data format of $ HDT standard, sending the azimuth out through a serial port connector 6 of the single chip microcomputer, receiving the azimuth by ADCP flow velocity flow direction measurement system software, and realizing flow velocity flow direction measurement.

It should be noted that the utility model discloses the technical scheme of claim protection is for using the singlechip to insert two GPS modules and satellite antenna simultaneously in directional terminal, and two satellite antenna keep fixed concrete structure, need realize through the singlechip program to singlechip module to satellite signal calculated, the compass data format of the ultimate $ HDT standard that reachs of conversion, and technical staff in the art can refer to above-mentioned logic and design, and no longer detailed here. In other words, the technical purpose of the present invention is to provide an infrastructure that can use GPS and a single chip microcomputer to combine to perform compass data format.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (3)

1. A high accuracy orientation terminal based on CORS system, includes shell body (1), its characterized in that: the single-chip microcomputer module (2) is installed in the outer shell (1), the single-chip microcomputer module (2) is respectively connected with the two GPS modules (4) through serial ports (3), the GPS modules (4) are connected with respective satellite antennas (5) through cables, the distance between the two satellite antennas (5) is larger than 1.5 m, and the GPS modules (4) are also connected with respective CORS differential receiving modules (7); the CORS differential receiving module (7) is used for receiving CORS signals through the GPS module (4), analyzing an NTrip protocol to obtain CORS differential signals, transmitting the CORS differential signals to the GPS module (4) through a serial port, and then transmitting the CORS differential signals and satellite signals received through the satellite antenna (5) to the single chip microcomputer module (2) through the GPS module (4).

2. A CORS system based high precision orientation terminal according to claim 1, characterized in that: the shell body (1) is provided with a serial port connector (6), and the serial port connector (6) is also connected into the single chip microcomputer module (2).

3. A CORS system based high precision orientation terminal according to claim 2, characterized in that: the satellite antennas (5) are all installed on the measuring ship body.

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