CN207752145U - A kind of Potable weather radar pulse signal generation device based on PXIe - Google Patents

Abstract

The utility model is related to a kind of Potable weather radar pulse signal generation device based on PXIe, including sequentially connected power management module, PXI e interface, PXIe bridge chips, FPGA microprocessors, two-way TTL transceivers and to external terminal；The FPGA microprocessors and two -way difference transceiver is also associated between external terminal.The present apparatus realizes that flexible interface configures by PXI e interface and PXIe bridge chips, can generate each component pulse signal in weather radar, can quickly carry out building for module testing platform；External interface direction is configurable, reduces wiring difficulty；Command interaction can be carried out with China New Generation Weather Radar fault detect platform, carry out the automatic test of each component；The portability for having height is carried to the radar station convenient for business personnel and carries out diagnostic test.

Description

A kind of Potable weather radar pulse signal generation device based on PXIe

Technical field

The utility model is related to weather radar field more particularly to a kind of Potable weather radar pulse letters based on PXIe Number generation device.

Background technology

In recent years, with the rapid development of meteorological cause, China New Generation Weather Radar is in Nowcasting and prevents and reduces natural disasters In increasingly show its critical role, therefore, investigation is also particularly important to the accurate positionin of its failure and in time.At present Domestic each service unit has also carried out more deep analysis and research to weather radar conventional fault, but largely rests on single On the basis of failure reason analysis and solution.

Country's China New Generation Weather Radar station is equipped with the portable fault detect platform based on PXIe, the platform packet at present Oscillograph, power meter, frequency spectrograph, signal source and multimeter are contained, all test instrumentations are integrated in a PXIe cabinet, use The platform can carry out radar fault positioning.But for most of pulse components module, it can only be carried out using fault detect platform Line is tested, since accordance with tolerance is stronger between each pulse components in radar system, for partial fault, multiple intermodules be difficult again into Capable more accurately fault location.

As shown in Figure 1, current pulse signal generation device of the weather radar pulse signal generation device based on CPLD, CPLD The multigroup pulse signal of internal curing, the peripheries CPLD generate radar pulse component institute using difference transmission chip and differential received chip The differential signal needed, user export pulse signal selected by user by selecting switch.But it has the following disadvantages：

1, since CPLD resources are limited, so producible pulse is limited, and flexibility is low.

2, external interface direction is fixed, and increases wiring difficulty.

3, do not have communication function, can not be communicated with other test terminals, complete automatic test.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of, and the Potable weather radar pulse based on PXIe is believed Number generation device, can simulate the input/output pulse of each component in Weather radar system, complete the offline failure of each pulse components Diagnosis quickly carries out the fine fault location of component.

The technical solution that the utility model solves above-mentioned technical problem is as follows：

A kind of Potable weather radar pulse signal generation device based on PXIe, including sequentially connected power management mould Block, PXI e interface, PXIe bridge chips, FPGA microprocessors, two-way TTL transceivers and to external terminal；The micro- places FPGA It manages device and is also associated with two -way difference transceiver between external terminal.

The utility model has the beneficial effects that：

Flexible interface configuration is realized using PXI e interface and PXIe bridge chips, passes through PXI e interface and fault detect platform Command interaction is carried out, the automatic test of each component is carried out；Pulse signal generation device and PXIe high are completed using PXIe bridge chips The data interaction of quick access mouth；Pulse generation module in pulse signal generation device is completed using FPGA, weather radar can be generated In each component pulse signal, can quickly carry out building for module testing platform；Using bi-directional transceiver flexible configuration external interface, Reduce wiring difficulty；The portability for having height is carried to the radar station convenient for business personnel and carries out diagnostic test.

Description of the drawings

Fig. 1 is the weather radar sequential generating means block diagram of the prior art；

Fig. 2 is the Potable weather radar sequential generating means structure chart based on PXIe of the utility model；

Fig. 3 is the command synchronization module connection figure of the utility model；

Fig. 4 is the order receiving circuit figure of the utility model；

Fig. 5 is the pulse generator circuit figure of the utility model；

Fig. 6 are the SN65LBC176A functional block diagrams of the utility model；

Fig. 7 is the LSF0101 internal functional block diagrams of the utility model；

Fig. 8 is the PXIe bridge chip connection figures of the utility model；

Fig. 9 is the power management module circuit diagram of the utility model.

Specific implementation mode

The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining this practicality It is novel, it is not intended to limit the scope of the utility model.

As shown in Fig. 2, the utility model provides a kind of Potable weather radar pulse signal generation dress based on PXIe It sets, including sequentially connected power management module, PXI e interface, PXIe bridge chips, FPGA microprocessors, two-way TTL transceivers And to external terminal；The FPGA microprocessors and two -way difference transceiver is also associated between external terminal.

PXI e interface uses HSSI High-Speed Serial Interface, and it is parallel data that can be bridged HSSI High-Speed Serial Interface by PXIe bridge chips Parallel interface is connected into FPGA by interface, you can realizes the communication based on PXI e interface.The pulse signal for having communication function generates Device can be completed to be seamlessly connected with existing fault detect platform, complete the automatic test of pulse components.

FPGA receives the control command from fault detect platform terminal, quickly generates user's setting pulse signal, cooperation Fault detect platform is tested automatically, is outputed test result.Since output pulse is controlled by fault detect platform command, pulse Signal generation apparatus locally designs a universal signal generating means, you can generates the available arbitrary sequence signal of radar, does not have Quantity limits.

External interface uses two -way difference transceiver and two-way TTL transceivers, user that wiring end signal can flexibly be arranged Transmission direction and level nature, substantially reduce wiring difficulty, external interface direction is unlimited, and it is flat that module testing can be rapidly completed Platform is built.

Pulse signal generation device receives the station command from PXI e interface, together using PXI e interface as communication interface When return sequential generating means operating status.The bridge joint of PXI e interface, FPGA internal timings are completed using dedicated bridge chip Device generates pulse signal according to order, and FPGA completes sending and receiving for two -way difference signal and two-way TTL signal.

As shown in figure 3, selecting the Cyclone III Series FPGA microprocessors of ALTERA companies in the utility model Controllers of the EP3C55 as this system, the device logic unit and storage resource are relatively abundant, and processing capacity is strong, fully meet this Requirement of the system to FPGA.FPGA work mainly point 3 parts, including command synchronization module, Order receiver module, letter in this system The function of number generation module.

The FPGA used in this system is integrated on piece SRAM memory, when due to PXIe bridge chips and Order receiver module Clock is asynchronous, so configuring on piece SRAM to two-port RAM operating mode in systems, completes command synchronization function.PXIe Bridge chip is connect with the data terminal of writing of command synchronization module, and Order receiver module is connect with the reading data terminal of command synchronization module.

As shown in figure 4, Order receiver module mainly uses the latch inside FPGA to realize that each parameter is arranged in root with comparator Corresponding latch address latches order this moment when setting address is consistent with command address.

As shown in figure 5, signal generator module mainly use FPGA inside counter, comparator, with door, reverser and data Selector realizes that parameter comes from PXIe buses, and command context should include the required repetition period for generating pulse, initial position, knot Beam position, signal polarity etc..32 digit counters of one cycle count of FPGA design count the modulus value pulse signal repetition period Parameter determines that level jump location is determined by pulse initial position and end-of-pulsing position, the signal polarity state modulator signal Whether need to export after negating.

Two -way difference transceiver used in the utility model uses the SN65LBC176A of TI companies, in the chip slapper It is integrated with differential transmitter and differential receiver, its concrete function is controlled by enable signal, functional block diagram is as shown in fig. 6, figure Middle A/B signals are differential pair signal, and when SN65LBC176A is configured to sending function, A/B signals are that the transmission of RS422 level is drawn Foot, when SN65LBC176A is configured to receive capabilities, A/B signals are that RS422 level receives pin.

Two-way TTL transceivers used in the utility model use the LSF0101 of TI companies, as shown in fig. 7, LSF systems Row device highest in capacitive load≤30pF supports the boost conversion of 100MHz and the decompression conversion of 100MHz or more；In capacitive Highest supports the step-up/down conversion of 40MHz when load is 50pF, therefore can support more consumer or telecommunication interfaces (MDIO or SDIO).LSF series supports bi-directional voltage conversion, and without using direction controlling pin, reduces to greatest extent System workload (PMBus, I2C or SMbus).The I/O port of LSF series is resistant to 5V voltages, therefore is answered with industry and telecommunications Transistor-Transistor Logic level compatibility in.The great flexibility of LSF series can be that different voltages switching levels are arranged in every channel.

PEX8111 is bridging chip of a local bus to PXIe, meets PXIe1.0 specifications, supports auto polarity anti- Turn, CRC check, link device power management, transport layer data packet control of queue.And there is direct holotype, directly from mould Formula and DMA functions, can simply implement PXI e interface, can local bus be easily very converted into PXIe designs.

Fig. 8 is the internal structure chart of PEX8111.To bridge mode and reversed bridge mode before PEX8111 supports, there are 144 to draw Foot, ball-type encapsulation, 66MHz local clocks have 2 DMA channels, support the sudden peaks transfer rate for reaching as high as 266MBps. There are 8KB shared drives can be for PXIE interfaces and PXI bus access.Its PXI e interface is connected with the PXIe slots of computer, And PXI e interface is connected with hardware FPGA.

Power management module has 4.5V~14V's using the chip PTH08T230WAD, PTH08T230WAD of TI companies Input range, the up to load capacity of 6A, transfer efficiency is up to 95%, for each module stability work in guarantee system, this system All power supplys are all converted using PTH08T230WAD.Wherein, the pin 2 of chip PTH08T230WAD is connected with pin 9 It is connected in input supply terminal, and input supply terminal is grounded by shunt capacitance；Pin 4 is connected with pin 5 is connected in out-put supply end, and Out-put supply end is grounded by shunt capacitance；Pin 7 is connected by resistance simultaneously in output ground terminal；Pin 3 and pin 6 are simultaneously Ground connection；Pin 1, pin 8 and pin 10 do not connect vacantly.

The present apparatus carries out command interaction using PXI e interface and existing portable fault detect platform, coordinates portable failure Detection platform completes the automatic test of pulse components, using bidirectional interface scheme, flexibly configurable terminals signal transmission direction, Wiring complexity is reduced, the workload of pulse components test is greatly reduced.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (5)

1. a kind of Potable weather radar pulse signal generation device based on PXIe, which is characterized in that including sequentially connected Power management module, PXI e interface, PXIe bridge chips, FPGA microprocessors, two-way TTL transceivers and to external terminal；Institute It states FPGA microprocessors and is also associated with two -way difference transceiver between external terminal.

2. the Potable weather radar pulse signal generation device according to claim 1 based on PXIe, which is characterized in that The power management module uses the chip PTH08T230WAD using TI companies.

3. the Potable weather radar pulse signal generation device according to claim 1 based on PXIe, which is characterized in that The FPGA microprocessors use the EP3C55 of ALTERA companies.

4. the Potable weather radar pulse signal generation device according to claim 1 based on PXIe, which is characterized in that The two-way TTL transceivers use the LSF0101 of TI companies.

5. the Potable weather radar pulse signal generation device according to claim 1 based on PXIe, which is characterized in that The two -way difference transceiver uses the SN65LBC176A of TI companies.