阅读说明：本技术 微小卫星的通用串口测试器 (Universal serial port tester for microsatellite ) 是由 贾臻 何波 张汉城 于 2020-06-24 设计创作，主要内容包括：本发明提供了一种微小卫星的通用串口测试器,包括PC机、USB转串口模块、带GPS模拟器的FPGA模块、CAN控制器、光耦隔离单元、电压比较器模块、温度传感器、设备串口和CAN通讯接口,所述PC机通过所述USB转串口模块与所述带GPS模拟器的FPGA模块连接,所述温度传感器通过所述电压比较器模块与所述带GPS模拟器的FPGA模块的IO接口连接,所述带GPS模拟器的FPGA模块与所述CAN控制器连接,所述CAN控制器通过所述光耦隔离单元分别与所述设备串口、CAN通讯接口连接。本发明的有益效果是：可方便接入地面测试系统,根据测试需要,提供实际环境温度以及模拟需要的GPS信息,即能实现半物理闭环仿真,可以减轻测试床的工作压力,提高测试床的通用化。(The invention provides a general serial port tester of a microsatellite, which comprises a PC (personal computer), a USB (universal serial bus) to serial port module, an FPGA (field programmable gate array) module with a GPS (global position system) simulator, a CAN (controller area network) controller, an optical coupling isolation unit, a voltage comparator module, a temperature sensor, an equipment serial port and a CAN communication interface, wherein the PC is connected with the FPGA module with the GPS simulator through the USB to serial port module, the temperature sensor is connected with an IO (input/output) interface of the FPGA module with the GPS simulator through the voltage comparator module, the FPGA module with the GPS simulator is connected with the CAN controller, and the CAN controller is respectively connected with the equipment serial port and the CAN communication interface through the optical coupling isolation unit. The invention has the beneficial effects that: the ground test system can be conveniently accessed, the actual environment temperature and the GPS information required by simulation are provided according to the test requirement, the semi-physical closed loop simulation can be realized, the working pressure of the test bed can be reduced, and the generalization of the test bed is improved.)

1. The utility model provides a general serial ports tester of microsatellite which characterized in that: including PC, USB change serial port module, take FPGA module, CAN controller, opto-coupler isolation unit, voltage comparator module, temperature sensor, equipment serial ports and the CAN communication interface of GPS simulator, the PC passes through USB change serial port module with take the FPGA module connection of GPS simulator, temperature sensor passes through voltage comparator module with take the IO interface connection of the FPGA module of GPS simulator, take the FPGA module of GPS simulator with the CAN controller is connected, the CAN controller passes through opto-coupler isolation unit respectively with equipment serial ports, CAN communication interface connection.

2. The universal serial port tester for microsatellites according to claim 1, wherein: the CAN communication interface is connected with a satellite-borne machine.

3. The universal serial port tester for microsatellites according to claim 1, wherein: and the USB interface of the PC is respectively connected with the IO interface of the FPGA module with the GPS simulator and the voltage comparator module.

Technical Field

The invention relates to auxiliary test equipment, in particular to a general serial port tester for a microsatellite.

Background

At present, closed-loop simulation test of domestic commercial aerospace is mainly carried out through a test bed, and along with the continuous increase of demands, a large number of single machine component models are compiled into the test bed, but the universalization of a satellite platform can not be done in the current commercial aerospace, namely, the communication mode and framing content of the single machine components are frequently changed, so that the universalization of the test bed is greatly limited, and the test bed is often set up to occupy long research and development time.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a general serial port tester for a microsatellite, which can reduce the working pressure of a test bed and improve the generalization of the test bed.

The invention provides a general serial port tester of a microsatellite, which comprises a PC (personal computer), a USB (universal serial bus) to serial port module, an FPGA (field programmable gate array) module with a GPS (global position system) simulator, a CAN (controller area network) controller, an optical coupling isolation unit, a voltage comparator module, a temperature sensor, an equipment serial port and a CAN communication interface, wherein the PC is connected with the FPGA module with the GPS simulator through the USB to serial port module, the temperature sensor is connected with an IO (input/output) interface of the FPGA module with the GPS simulator through the voltage comparator module, the FPGA module with the GPS simulator is connected with the CAN controller, and the CAN controller is respectively connected with the equipment serial port and the CAN communication interface through the optical coupling isolation unit.

As a further improvement of the invention, the CAN communication interface is connected with a satellite-borne machine.

As a further improvement of the invention, the USB interface of the PC is respectively connected with the IO interface of the FPGA module with the GPS simulator and the voltage comparator module.

The invention has the beneficial effects that: by the scheme, the ground test system can be conveniently accessed, the actual environment temperature and the GPS information required by simulation are provided according to the test requirement, semi-physical closed loop simulation can be realized, the working pressure of the test bed can be reduced, and the universality of the test bed is improved.

Drawings

FIG. 1 is a schematic diagram of a universal serial port tester for microsatellites according to the present invention.

FIG. 2 is a schematic diagram of the closed loop emulation access of the universal serial port tester of the microsatellite through the CAN with the PXI5659 board card.

Detailed Description

The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.

As shown in figure 1, the general serial port tester for the microsatellite comprises a PC (personal computer) 1, a USB (universal serial bus) to serial port module 2, an FPGA (field programmable gate array) module 3 with a GPS (global positioning system) simulator, a CAN (controller area network) controller 5, an optical coupling isolation unit 7, a voltage comparator module 6, a temperature sensor 8, an equipment serial port 10 and a CAN communication interface 9, the PC 1 is connected with the FPGA module 3 with the GPS simulator through the USB-to-serial port module 2, the temperature sensor 8 is connected with the IO interface 4 of the FPGA module with the GPS simulator through the voltage comparator module 6, the FPGA module 3 with the GPS simulator is connected with the CAN controller 5, the CAN controller 5 is respectively connected with the equipment serial port 10 and the CAN communication interface 9 through the optical coupling isolation unit 7, and the USB interface of the PC 1 is respectively connected with the IO interface 4 of the FPGA module with the GPS simulator and the voltage comparator module 6.

As shown in FIG. 1, the present invention adopts the design scheme with fpga as the core, and USB interface chip is adopted, and the PC is directly powered by USB, so as to avoid the power supply problem. And the USB chip can be directly identified into a serial port and is directly observed by a serial port assistant. The device serial port 10 adopts optical coupling isolation DC to ensure the safety of the on-board interface. The CAN communication interface 9 adopts optical coupling isolation DC to ensure the safety of the on-board interface. After the temperature sensor 8 (onewire) is connected with the voltage comparator module 6, the temperature sensor is connected with the IO interface 4 of the FPGA and is sent to the PC 1 and the satellite-borne board card through the serial port function. The GPS writes the FPGA module into the board card by writing the FPGA module to form an FPGA module 3 with a GPS simulator, and the GPS starting time CAN be modified by communicating with the spaceborne machine through the CAN.

As shown in fig. 1, the model of the USB to serial port module 2 is PL2303, the model of the USB to serial port module 2 is USB to 232, the model of the CAN controller 5 is SJA1000, the model of the CAN communication interface 9 is 82C05, and the model of the device serial port 10 is MAX3086, which is 422 for driving.

As shown in FIG. 2, in the first embodiment of the present invention, a temperature and GPS simulator is implemented by semi-physical simulation.

The tester CAN be conveniently accessed to a ground test system, actual environment temperature and GPS information required by simulation are provided according to test requirements, semi-physical closed-loop simulation CAN be realized, and FIG. 2 shows that the temperature and GPS simulator is accessed through closed-loop simulation of CAN with a PXI5659 board card.

The invention provides a general serial port tester for a microsatellite, which adopts a test box structure, and a USB port of a test box is connected with a USB port of a computer to be electrified and operated. The temperature and GPS data CAN be sent to a satellite ground test system and also provided to a satellite-borne machine through a CAN bus. When the satellite is modified, the condition of serial work does not exist with other equipment, and the satellite development period is effectively prolonged.

The size of the whole test box is only 170mm multiplied by 100mm multiplied by 45mm, the USB directly supplies power, the USB can receive the power by using the universal serial assistant software, secondary development is facilitated, other index requirements of the test box can be improved by combining requirements, a chip with lower cost is selected, and special PC software can be written to realize data observation more conveniently.

According to the general serial port tester for the microsatellite, the temperature simulator is directly connected into the closed loop test system, so that the pressure of ground test equipment is reduced, the environmental temperature is really acquired, and the same effect is achieved by adding the GPS simulator.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.