CN205941790U - Multichannel partial discharge UHF capture card - Google Patents

Abstract

The utility model provides a multichannel partial discharge UHF capture card, including analog -digital conversion chip, the FPGA chip, outer triggering signal produces the circuit, ARM nuclear core plate and detection conditioning module, an analog -digital conversion chip, the FPGA chip produces the fixed setting of circuit on the capture card with outer triggering signal, be the both way junction between analog -digital conversion chip and the FPGA chip, outer triggering signal produces circuit and the one -way connection of FPGA chip, analog -digital conversion chip is including being equipped with the I th analog -digital conversion chip and the II th analog -digital conversion chip that 4 sweetgum fruits were said respectively, ARM nuclear core plate fixes on the capture card through double contact pin and to pass through the SPI bus continuous with the FPGA chip, detection conditioning module passes through the front end of bolt fastening setting at the capture card, detection conditioning module's input and high frequency sensor are connected, ARM nuclear core plate passes through net gape or USB mouth and customer end and links to each other. The utility model discloses effectively solved current shut down discharge test method time span big, influence the technical problem that economic benefits just probably damaged equipment.

Description

A kind of multichannel shelf depreciation UHF capture card

Technical field

This utility model is related to a kind of card for industrial computer and in particular to a kind of multichannel shelf depreciation UHF（Hyperfrequency）Adopt Truck.

Background technology

Partial Discharge Detection is the main method of inspection Electric Power Equipment Insulation performance.Equipment to be checked whether generation office in the past Discharge in portion, mostly using the method shutting down discharge test.This method not only has a certain degree of destruction to equipment performance, and Economic benefit can be affected.More importantly shut down detection can not possibly often carry out, time span is than larger it is impossible to ensure to send out in time Go out shelf depreciation alarm, serious in the case of power equipment can be made to scrap, cause huge loss to enterprise and country.

There is the partial breakdown that shelf depreciation is at insulation defect in GIS, a very steep pulse in forward position can be produced simultaneously Electric current, and propagate to ambient radiation in the form of an electromagnetic wave.The breakdown process of shelf depreciation is faster, the leading-edge steepness of pulse current Bigger, then the frequency of radiated electromagnetic wave is higher.The dielectric strength of SF6 gas is far above air, between the electric discharge of thus like shape Gap, discharge in SF6 gas produced by wave frequency will be far above common aerial discharge.GIS device produces Local discharge signal frequency range be located at hyperfrequency（UHF）Section, about 300MHz ~ 1500MHz.

Due to the needs of conductor support and air chamber isolation, a lot of disk insulators inside GIS device, are had to be arranged on connection Between flange.Disk insulator makes the Insulating gap that there is a very little between metal flange, the UHF signal within as GIS When traveling at disk insulator, part signal can be radiated the external of GIS device by this Insulating gap.This signal is not letter Single by gap from GIS internal communication to outside, UHF signal flows through and can produce secondary radiation at gap during GIS housing, and Gap width will not exert a decisive influence to radiant intensity.Therefore, lay antenna at the external disk insulator of GIS, then The UHF local discharge signal within GIS device can be sensed.When UHF signal is propagated in atmosphere, its strength retrogression is very Hurry up.Even if GIS device is neighbouring there are other UHF interference sources, its coverage is also less, will not be to the measurement of partial discharge of distant place Produce interference.Therefore, carry out the sensing detection of local discharge signal in uhf band, be obtained in that higher signal to noise ratio.

Content of the invention

The purpose of this utility model is to provide a kind of multichannel shelf depreciation UHF capture card, this utility model effectively solving Existing shut down that discharge test method time span is big, impact economic benefit and may damage equipment technical problem.

The purpose of this utility model is realized in the following manner：

A kind of multichannel shelf depreciation UHF capture card, described capture card board include modulus conversion chip, fpga chip, External trigger signal generating circuit, ARM core board and detection conditioning module, described modulus conversion chip, fpga chip and external trigger Signal generating circuit is fixedly installed on capture card board, is to be bi-directionally connected between described modulus conversion chip and fpga chip, Described external trigger signal generating circuit and the unidirectional connection of fpga chip, described modulus conversion chip includes the Ith modulus conversion chip With the IIth modulus conversion chip, the Ith modulus conversion chip and the IIth modulus conversion chip are respectively equipped with 4 paths, ARM core board It is fixed on capture card board by double contact pin and is connected by spi bus with fpga chip, described detection conditioning module is led to Cross the front end that bolt is fixedly installed on capture card board, the input of detection conditioning module is connected with high frequency sensors, described ARM core board passes through network interface or USB port is connected with client.

Described external trigger signal generating circuit includes the binding post of unidirectional connection, voltage transformer, amplifying circuit successively With waveform translation circuit, described binding post input is connected with 220V civil power.

Using metal-back shielding parcel outside described detection conditioning module.

Described detection conditioning module includes the Ith detection conditioning module and the IIth detection conditioning module, the Ith detection conditioning module It is stacked with the IIth detection conditioning module.

The FLASH memory of the SDRAM and a piece of 512MB of two panels 32MB is arranged on described ARM core board.

The detection frequency of described high frequency sensors is 300MHz ~ 1500MHz.

Described ARM core board and fpga chip backboard connect.

With respect to prior art, this utility model can set to high pressure such as transformator, GIS combination electric appliance, switch cubicle, cables The standby Partial Discharge Detection realizing 1 to 8 passage, is sampled using high-speed AD to discharge signal, sampled signal is carried out in real time Statistical disposition, and set up server on UHF capture card, real-time Transmission is carried out to the signal of collection by ICP/IP protocol, supplies Rear end visual software analysis uses.

Brief description

Fig. 1 is schematic diagram of the present utility model.

Fig. 2 is structural representation of the present utility model.

Fig. 3 is the structural representation of external trigger signal generating circuit of the present utility model.

Wherein, description of reference numerals is as follows：

1st, capture card；2nd, passage；3rd, modulus conversion chip；4th, fpga chip；5th, ARM core board；6th, external trigger signal produces Raw circuit, 7, detection conditioning module；8th, bolt；9th, channel interface；10th, cabinet link slot.

Specific embodiment

As shown in Figure 1-2, multichannel shelf depreciation UHF capture card of the present utility model, described capture card 1 includes modulus Conversion chip 3, fpga chip 4, external trigger signal generating circuit 6, ARM core board 5 and detection conditioning module 7, analog digital conversion core Piece 3, fpga chip 4 and external trigger signal generating circuit 6 are fixedly installed on capture card 1, modulus conversion chip 3 and fpga chip It is to be bi-directionally connected between 4, external trigger signal generating circuit 6 and the unidirectional connection of fpga chip 4, modulus conversion chip 3 includes the Ith mould Number conversion chip and the IIth modulus conversion chip, the Ith modulus conversion chip and the IIth modulus conversion chip are respectively equipped with 4 tunnels and lead to Road, ARM core board 5 is fixed on capture card 1 by double contact pin and is connected by spi bus with fpga chip 4, and detection is nursed one's health Module 7 is bolted the front end being arranged on capture card 1, and the input of detection conditioning module 7 is connected with high frequency sensors, ARM core board 5 passes through network interface or USB port is connected with client.Detection conditioning module 7 includes the Ith detection conditioning module and the IIth Detection conditioning module, the Ith detection conditioning module and the IIth detection conditioning module are stacked.The detection frequency of high frequency sensors is 300MHz~1500MHz.ARM core board 5 and fpga chip 4 backboard connect.

ARM core board 5 is connected with capture card 1 in the form of contact pin, and it is solid for it that capture card 1 provides double contact pin Fixed, realize powering to ARM core board 5 by double contact pin, the function such as data exchange simultaneously.On ARM core board 5, memorizer includes SDRAM and FLASH：The system configuration SDRAM of two panels 32MB, internal memory as arm processor；The Nand of a piece of 512MB Flash, in order to store program and the data of arm processor.ARM core board 5 embeds (SuSE) Linux OS, can pass through capture card On network interface carry out download and the maintenance of core board application program.

As shown in figure 3, external trigger signal generating circuit 6 include successively the binding post of unidirectional connection, voltage transformer, put Big circuit and waveform translation circuit, described binding post input is connected with 220V civil power.External trigger circuit is used for capture card Collection time started and the control of acquisition time length.External trigger circuit, by the way of binding post, 220VAC civil power is connect Enter in capture card, then the sine wave AC small-signal that the frequency obtaining several mv through voltage transformer is 50HZ, through one-level Signal amplifier, obtaining the effective amplitude of the voltage about frequency of 3V is 50HZ sine wave signal, exports frequency through waveform translation circuit Rate is the square-wave signal of 50Hz, inputs to fpga chip 4.Fpga chip 4 is according to the rising edge of square-wave signal or decline Along the collection carrying out modulus conversion chip 3 and stopping acquisition operations.

Capture card 1 mainly complete modulus signal conversion, sampled-data processing, data transfer, capture card basic function setting, The functions such as the outer pulses generation of power frequency component, the board of pluggable industry control cabinet.Front end detection conditioning module 7 comprises four-way amplitude modulation Modular circuit, shields parcel using metal-back, is secured by bolts in capture card 1 front end, highest can fix 2 layers of totally 8 passage.High Video sensor accesses front end detection conditioning module 7, and by analogue signal amplitude modulation to modulus conversion chip 3 sample range, modulus Conversion chip 3 completes analog signal digital and processes, and is sent in fpga chip 4.Fpga chip 4 passes through at spi bus and ARM Reason device is connected, and fpga chip 4 is processed on request to the data of sampling.A server is built, by client inside arm processor The data of end request is sent to client by network interface.

Capture card 1 includes voltage transformation module, high-speed AD, FPGA, interface, debugging mouth etc., bears ARM core using FPGA backboard The connected mode of core, is communicated with host computer by network interface and USB interface.From client first in UHF capture card 1 Server connects, and sends arrange parameter order to UHF capture card 1, and capture card 1 is configured work according to setting command, setting Finish backward client replys whether arrange successful message.Client sends to collection card server and reads data command, adopts Truck 1 replies message.

Above-described is only preferred implementation of the present utility model it is noted that for those skilled in the art For, under the premise of without departing from this utility model general idea, some changes and improvements can also be made, these also should be considered as Protection domain of the present utility model.

Claims (7)

1. a kind of multichannel shelf depreciation UHF capture card it is characterised in that：Described capture card board include modulus conversion chip, Fpga chip, external trigger signal generating circuit, ARM core board and detection conditioning module, described modulus conversion chip, fpga chip It is fixedly installed on capture card board with external trigger signal generating circuit, be double between described modulus conversion chip and fpga chip To connection, described external trigger signal generating circuit and the unidirectional connection of fpga chip, described modulus conversion chip includes the Ith modulus and turns Change chip and the IIth modulus conversion chip, the Ith modulus conversion chip and the IIth modulus conversion chip are respectively equipped with 4 paths, ARM Core board is fixed on capture card board by double contact pin and is connected by spi bus with fpga chip, described detection conditioning Module is bolted the front end being arranged on capture card board, and the input of detection conditioning module is connected with high frequency sensors Connect, described ARM core board passes through network interface or USB port is connected with client.

2. multichannel shelf depreciation UHF capture card according to claim 1 it is characterised in that：Described external trigger signal produces Raw circuit includes the binding post of unidirectional connection, voltage transformer, amplifying circuit and waveform translation circuit successively, described terminals Sub- input is connected with 220V civil power.

3. multichannel shelf depreciation UHF capture card according to claim 1 it is characterised in that：Described detection conditioning module Outside shielding using metal-back is wrapped up.

4. multichannel shelf depreciation UHF capture card according to claim 3 it is characterised in that：Described detection conditioning module Including the Ith detection conditioning module and the IIth detection conditioning module, the Ith detection conditioning module and the stacking of the IIth detection conditioning module set Put.

5. multichannel shelf depreciation UHF capture card according to claim 1 it is characterised in that：Set on described ARM core board Put the FLASH memory of the SDRAM and a piece of 512MB of two panels 32MB.

6. multichannel shelf depreciation UHF capture card according to claim 1 it is characterised in that：Described high frequency sensors Detection frequency is 300MHz ~ 1500MHz.

7. multichannel shelf depreciation UHF capture card according to claim 1 it is characterised in that：Described ARM core board and Fpga chip backboard connects.