CN219678483U - Device for automatically calibrating transmitting power of Beidou short message terminal - Google Patents

Abstract

The utility model discloses a device for automatically calibrating the transmitting power of a Beidou short message terminal, belonging to the field of satellite short message communication, wherein a power calibration part of the device comprises an MCU module for processing detected information and detection information, a serial port communication module for communicating with an upper computer, a liquid crystal display module for displaying RDSS inbound power information and equipment parameter information and a test interface module for connecting detected equipment; the liquid crystal display module, the test interface module and the serial port communication module are all connected with the MCU module in a bidirectional manner; the power detection part comprises a detection module for detecting the inbound transmitting power of the tested equipment and a radio frequency interface module for connecting with a radio frequency connector of a transmitting antenna of the tested equipment; the radio frequency interface module is connected with the detection module, and the detection module is connected with the MCU module. The utility model uses the wired test to replace the wireless test of the microwave darkroom, and can realize automatic calibration by being matched with the upper computer software, thereby increasing the efficiency.

Description

Device for automatically calibrating transmitting power of Beidou short message terminal

Technical Field

The utility model relates to the field of satellite short message communication, in particular to a device for automatically calibrating the transmitting power of a Beidou short message terminal.

Background

At present, a satellite navigation positioning terminal with RDSS communication positioning function needs to correctly respond to a power control instruction broadcast by a central station to adjust corresponding power. The current inbound power adjustment requirement is built-in 16-gear inbound power, 0.5dB per gear interval, with an error of 0.5dB.

The existing terminal adjustment transmitting power calibration is manually adjusted by a tester through a testing system arranged in a microwave darkroom. The existing transmitting power calibration system has obvious defects:

long time consumption, low efficiency, large volume and high price.

Disclosure of Invention

In view of the above, in order to overcome the defects of the existing test system, the utility model provides a novel Beidou short message terminal automatic calibration transmitting power device which is small in size, can replace microwave darkroom wireless test by using wired test, and can realize automatic calibration by matching with upper computer software, thereby increasing efficiency.

The technical scheme provided by the utility model is as follows:

the device for automatically calibrating the transmitting power of the Beidou short message terminal comprises a power calibration part and a power detection part;

the power calibration part comprises an MCU module for processing the detected information and the detected information, a serial port communication module for communicating with an upper computer, a liquid crystal display module for displaying RDSS inbound power information and device parameter information, and a test interface module for connecting the detected device; the liquid crystal display module, the test interface module and the serial port communication module are all connected with the MCU module in a bidirectional manner;

the power detection part comprises a detection module for detecting the inbound emission power of the tested equipment and a radio frequency interface module for connecting with a radio frequency connector of an emission antenna of the tested equipment; the radio frequency interface module is connected with the detection module, and the detection module is connected with the MCU module.

Further, the power calibration part and the power detection part also comprise power supply modules for supplying power.

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

from the above description, the technical scheme of the utility model has the following beneficial effects:

1. the Beidou short message terminal automatic calibration transmitting power device adopts a wired connection test mode, can be carried out in a non-darkroom test environment, and increases the convenience of building a calibration environment.

2. The Beidou short message terminal automatic calibration transmitting power device adopts an independent detection module to replace the existing spectrometer with the most use, so that the cost can be reduced.

3. The MCU module can adaptively adjust the transmitting power of the tested equipment according to the transmitting power obtained by the detection module, and sends the result to the upper computer software. Automatic calibration can replace manual calibration, so that the working efficiency is improved, and the labor cost is reduced.

Drawings

For a clearer description of the present patent, one or more drawings are provided below, which are intended to aid in the description of the background, principles, and/or certain embodiments of the present patent.

FIG. 1 is a schematic circuit diagram of a power calibration portion of the present utility model;

fig. 2 is a schematic circuit diagram of a power detection section of the present utility model.

Detailed Description

The apparatus of the present embodiment is divided into a power calibration section and a power detection section: the power calibration part consists of an MCU module, a serial port communication module, a liquid crystal display module, a test interface module and a power supply module 1; the power detection part consists of a detection module, a radio frequency interface die and a power supply module 2; wherein,,

the MCU module main control chip of the power calibration part is GD32F103RET6 and is used for processing tested equipment information and detection information, wherein the tested equipment information comprises RDSS inbound communication information and equipment parameter setting information, and the detection information comprises RDSS inbound power information. The MCU module converts the voltage signal generated by the detection module into corresponding inbound power information through the AD sampling function of the MCU module. The MCU module can automatically adjust the RDSS inbound communication power setting according to the fed back RDSS inbound power information, so that the inbound power of the Beidou module can meet the network access requirement;

the serial port communication module main control chip of the power calibration part is MAX3232ESE and is used for automatically calibrating the transmitting power device of the Beidou short message terminal to carry out serial port communication with the upper computer;

the liquid crystal display module of the power calibration part is a liquid crystal display screen with the resolution of 128 x 64, and the parallel port driver is used for displaying RDSS inbound power information and equipment parameter information;

the test interface module of the power calibration part is used for connecting the Beidou short message terminal to automatically calibrate the transmitting power device and the tested equipment, and comprises power supply and communication;

the power module 1 of the power calibration section is used for converting the mains 220VAC into a supply voltage 5VDC for the test interface module for powering the various modules of the power calibration section and the device under test.

The detection module of the power detection section is used for detecting the inbound transmit power of the device under test. The detection module is connected with the radio frequency connector of the transmitting antenna of the tested device through a coaxial radio frequency wire, and can generate a voltage signal corresponding to the conversion of the inbound power after the inbound communication is successful. A 10W burnout-resistant 40dB attenuator is integrated in the detection module to prevent overlarge power damage;

the radio frequency interface module of the power detection part is used for being connected with the radio frequency connector of the transmitting antenna of the tested equipment through a coaxial radio frequency wire, and can generate a voltage signal corresponding to the inbound power conversion after the inbound communication is successful;

the power module 2 of the power detection part is used for converting 220VAC of commercial power into 5VDC of power supply voltage used by the test interface module to supply power to the detection module.

Workflow of the power calibration part:

1. the tested terminal is connected with the MCU module through the test interface module, and the power module 1 is responsible for supplying power;

2. the upper computer software sends a test starting instruction through the serial port communication module, and the MCU module starts an automatic calibration process;

3. the tested terminal sends short message communication of different power gears once at intervals of 5 seconds, and contacts and sends 127 times, and the MCU module receives voltage signals fed back by the detection module each time and converts the voltage signals into corresponding transmitting power;

4. the MCU module screens proper 16-gear parameters from 127-gear transmission parameters, so that the tested terminal can meet the network access requirement of the Beidou terminal. And the MCU module writes the 16-gear parameters into the tested terminal.

5. After the automatic calibration process is finished, the liquid crystal display module displays the calibration result.

Workflow of the power detection section: after the MCU module starts the automatic calibration flow, the power calibration part sends short message communication of different power gears once at intervals of 5 seconds, and the detection module converts the power signal into a voltage signal and transmits the voltage signal to the MCU module of the power calibration part.

Claims (2)

1. The device for automatically calibrating the transmitting power of the Beidou short message terminal is characterized by comprising a power calibration part and a power detection part;

the power calibration part comprises an MCU module for processing the detected information and the detected information, a serial port communication module for communicating with an upper computer, a liquid crystal display module for displaying RDSS inbound power information and device parameter information, and a test interface module for connecting the detected device; the liquid crystal display module, the test interface module and the serial port communication module are all connected with the MCU module in a bidirectional manner;

the power detection part comprises a detection module for detecting the inbound emission power of the tested equipment and a radio frequency interface module for connecting with a radio frequency connector of an emission antenna of the tested equipment; the radio frequency interface module is connected with the detection module, and the detection module is connected with the MCU module.

2. The apparatus for automatically calibrating transmission power of a beidou short message terminal according to claim 1, wherein the power calibration part and the power detection part further comprise power supply modules for supplying power.