CN202547697U

CN202547697U - Airborne sensor data acquisition system based on FPGA (field programmable gate array)

Info

Publication number: CN202547697U
Application number: CN2012202025211U
Authority: CN
Inventors: 叶自清
Original assignee: Central South University of Forestry and Technology
Current assignee: Central South University of Forestry and Technology
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-11-21
Anticipated expiration: 2022-05-08

Abstract

The utility model discloses an airborne sensor data acquisition system based on a field programmable gate array (FPGA). The airborne sensor data acquisition system is characterized by comprising a multiple-path analog switch for using one path of multiple paths of field sensor signals to acquire; a signal conditioning circuit for filtering noise signals; an amplification signal for amplifying weak sensor detection signals; an A/D (analog/digital) converter for covering analog voltage signals output by the sensor into digital voltage signals and sending the voltage signals to the FPGA, the FPGA generates two paths of outputs, one path is connected to an upper computer through an RS-422 driving circuit to realize asynchronous serial communication with the upper computer; the other path is connected to an ARINC429 bus through a bus interface chip HS-3282 to realize communication with other airborne electronic equipment. The system realizes high speed acquisition and transmission of the airborne sensor data, realizes two communication interfaces of ARINC429 and RS-422, and the system has intelligent error correction function with the adoption of corresponding error control.

Description

Airborne sensor data acquisition system (DAS) based on FPGA

Technical field

The utility model relates to data acquisition system (DAS), particularly based on the airborne sensor data acquisition system (DAS) of FPGA, is mainly used in airborne sensor data acquisition and data sharing.

Background technology

Existing airborne sensor collecting device one or more computing machine often connects the acquisition time that various types of sensors are responsible for each road parameter; This reliability to data, speed and aspect of performance all have certain influence; And inevitably making the air environment volume become very huge, cost is also too high relatively.Adopt the ARNIC429 data bus; Reliable assurance can be provided for the data communication of air environment; Thereby the airborne sensor data acquisition system (DAS) that development employing ARNIC429 data bus carries out data communication reduces equipment cost and improves the air environment communication quality all having great importance for reducing the air environment volume.At present for this type of data acquisition system (DAS) certain research is arranged abroad; Is core like U.S. CBL Systems Inc with the LONWORKS technology; Developed distributed on-board data harvester; This device is supported LONW0RKS and SAE – AS-5370 open protocol standard, and 32 circuit-switched data passage collections are provided.Also have the DD-429XRP5-300 type ARNIC429 bus communication plate of U.S. DDC company production and the IP429 series A RINC429 bus interface board of Dynamic Engineering company production etc. in addition.Technology is not provided but external research side only provides product, carries out technical monopoly, the ARNIC429 bus airborne data acquisition system that this just forces China to develop to have own intellecture property.Domestic aspect, the airborne data acquisition system of early development is limited by technical conditions, can not guarantee the reliability of system, and the hardware circuit more complicated.Each tool of existing data acquisition system (DAS) is characteristics alone, but the most complicated operation of present system, and are mostly the private communication facility of certain airborne bus, and versatility is not high, poor compatibility, and also there is big gap in not up to standardization in design with advanced foreign technology.

Summary of the invention

The technical matters that the utility model will solve provides a kind of real-time, reliable airborne sensor data acquisition system (DAS), and adopts the ARINC429 data bus to realize that airborne sensor detects the shared of data.

The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be: a kind of airborne sensor data acquisition system (DAS) based on FPGA, it is characterized in that, and comprise multiway analog switch, be used for selecting a road of multichannel spot sensor signal to gather; Signal conditioning circuit is used for the filtering noise signal; Amplifying circuit is used for faint sensor signal is amplified; Power circuit is for each circuit module provides suitable working power; Signal processing chip adopts field programmable gate circuit (FPGA), and described FPGA comprises Block RAM cache module, DCM Clock Managing Unit, UART transmission circuit and ARINC429 interface circuit.It is characterized in that; A/D converter converts the analog voltage signal of sensor output to digital voltage signal and delivers to FPGA and handle; Field programmable gate array produces two-way output, and the RS-422 driving circuit of leading up to is received host computer, realizes the asynchronous serial communication with host computer; The Bus Interface Chip HS-3282 of leading up in addition receives the ARINC429 bus, realizes with communicating between other air environments.

The beneficial effect of the utility model: native system is the basis with the FPGA technology; With the ARINC429 bussing technique is core, can realize the collection and the transmission of some master datas such as speed, acceleration, the angle of pitch, engine temperature, weathercock signal in the body operational process.Data acquisition is good with the transmission real-time, reliability is high.This system can gather 32 road airborne sensor signals simultaneously.This system adopts FPGA and high performance communication protocol chipset HS3282/3182 to combine and designs the ARINC429 communication interface, makes this part hardware circuit both effectively simple, again can the strict guarantee reliability of data communication.Simultaneity factor adopts CRC with communicating by letter of host computer, and in FPGA, realizes, makes system have the intelligent correction function.

Description of drawings

Fig. 1 is the utility model general structure synoptic diagram; Fig. 2 is a data acquisition algorithm flow chart among the utility model embodiment 1.

Embodiment

Embodiment 1: as shown in Figure 1, a kind of airborne sensor data acquisition system (DAS) based on FPGA is characterized in that, comprises multiway analog switch, is used for selecting a road of multichannel spot sensor signal to gather; Signal conditioning circuit is used for the filtering noise signal; Amplifying circuit is used for faint sensor signal is amplified; Power circuit is for each circuit module provides suitable working power; Signal processing chip adopts field programmable gate circuit (FPGA), and described FPGA comprises Block RAM cache module, DCM Clock Managing Unit, UART transmission circuit and ARINC429 interface circuit.

Gather through a road in the selected multiple sensor signal of MUX in the native system; Then the simulating signal that collects is sent into signal conditioning circuit, the filtering noise signal gets into amplifying circuit afterwards; Fainter sensor signal is amplified; Then send into the A/D device and change successively, the result after converting is stored in the high-speed cache dual port RAM of FPGA inside by Block RAM structure, thereby has accomplished data acquisition; And wait for reading of communication module, the sensor data acquisition flow process is as shown in Figure 2.The communication interface part is on the one hand by the RS-422 asynchronous serial communication of UART transmission circuit through realization of RS-422 driving circuit and host computer; On the other hand through the correct command information of judging host computer; The sensor information of storing in the dual port RAM is passed through the ARINC429 interface circuit; And after high performance communication protocol chipset (Bus Interface Chip) HS3282 converts specific form to, be sent on the ARINC429 bus, thereby accomplish ARINC429 communication.The interface circuit of RS-422 and ARINC429 all is to utilize the FPGA internal resource, realizes with the design of Verilog HDL hardware description language.The required Generation of Clock Signal of all module work is mainly accomplished in the clock signal processing section, in order to support each several part work.

Claims

1. airborne sensor data acquisition system (DAS) based on FPGA, comprising: multiway analog switch is used for selecting a road of multichannel spot sensor signal to gather; Signal conditioning circuit is used for the filtering noise signal; Amplifying circuit is used for faint sensor signal is amplified; Power circuit is for each circuit module provides suitable working power; It is characterized in that; A/D converter converts the analog voltage signal of sensor output to digital voltage signal and delivers to field programmable gate array (FPGA) and handle; Field programmable gate array produces two-way output; The RS-422 driving circuit of leading up to is received host computer, realizes the asynchronous serial communication with host computer; The Bus Interface Chip HS-3282 of leading up in addition receives the ARINC429 bus, realizes with communicating between other air environments.

2. system according to claim 1 is characterized in that, it is master controller that said system adopts FPGA.