CN102279573A - Movable laboratory - Google Patents
Movable laboratory Download PDFInfo
- Publication number
- CN102279573A CN102279573A CN 201110096747 CN201110096747A CN102279573A CN 102279573 A CN102279573 A CN 102279573A CN 201110096747 CN201110096747 CN 201110096747 CN 201110096747 A CN201110096747 A CN 201110096747A CN 102279573 A CN102279573 A CN 102279573A
- Authority
- CN
- China
- Prior art keywords
- circuit
- pxi
- circuit board
- integrated circuit
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Semiconductor Integrated Circuits (AREA)
Abstract
The invention discloses a movable laboratory, which comprises an instrument modularized PXI (PCI Extensions for Instrumentation) integrated circuit board, a PXI chassis and a computer, wherein the instrument modularized PXI integrated circuit board is fixedly arranged in the PXI chassis with a PXI slot; and the PXI chassis is connected with the computer through an Express Card or a PXI-PCI (PCI Extensions for Instrumentation-Peripheral Component Interconnect) cable. The invention has the advantages that: multiple kinds of electronic measuring and analyzing instruments are integrated together through the instrument modularized PXI integrated circuit board based on a PXI technology platform, so that control over the electronic measuring and analyzing instruments can be realized through a computer, data acquisition, data storage, data analysis functions and the like are realized, time is saved, and the movable laboratory is convenient to use; the miniaturization and mobility of a general laboratory platform are enhanced, so that the environmental adaptability is enhanced; and the movable laboratory has a simple interface, and is easy to operate.
Description
Technical field
The present invention relates to a kind of portable laboratory, particularly relate to a kind of portable laboratory, belong to removable laboratory equipment technical field based on the PXI technology platform.
Background technology
The laboratory platform of electronic semi-conductor's industry needs many kinds of measuring equipments, testing tools to form usually, comprises Switching Power Supply, digital multimeter, ohmmeter, oscillograph, Hi-pot Tester, logic analyser, anamorphoser, network analyzer, frequency spectrograph, arbitrary waveform signal generator, power meter etc. help scientific research personnel or technician to carry out work such as data acquisition, data analysis, simplation verification.
At present, in the electronic leaning laboratory platform of prior art, the equipment, the instrument that are constituted are of a great variety, and occupation area of equipment is big.For example, oscillograph is a kind of purposes electronic measuring instrument very widely, it can the invisible converting electrical signal of naked eyes become can observable picture showing people at the moment, be convenient to the change procedure that people study various electrical phenomenas, utilize oscillograph can observe the time dependent squiggle of various unlike signal amplitudes, can also test various electric weight with it, as voltage, electric current, frequency, phase differential and AM depth or the like.For example, direct supply, nearly all electronic leaning laboratory all disposes direct supply, and personnel for deliberation test use.Again for example, digital multimeter as a kind of multifunctional electronic surveying instrument, generally comprises functions such as galvanometer, voltage table, ohmmeter.Above-mentioned electronic test or electronic measuring instrument generally do not possess the function of electronical record data; The data of record data, or analysis if desired just need to select have the oscillograph of computer interface or digital multimeter to come information such as memory image or measurement data.Like this, just can assist scientific research personnel or technician to carry out work such as data acquisition, data analysis, simplation verification, bring inconvenience for scientific research personnel or technician.
In the ordinary laboratory platform of universal electric industry, defect of insufficient such as the ubiquity mobility is poor, accommodative ability of environment is low; Be unfavorable for the data analysis of special item, as parameter analysis to equipment under test in the workshop condition, parameter acquisition etc. in the wind energy power plant.
Summary of the invention
Technical matters to be solved by this invention is, a kind of thermometrically laboratory equipment based on the PXI technology platform is provided, and every kind is measured or the PXI integrated circuit board of the instrument moduleization of analytical instrument combines, and becomes as a whole portable laboratory.
The technical solution adopted in the present invention is that a kind of portable laboratory comprises, the PXI integrated circuit board of instrument moduleization, PXI cabinet and computing machine; Described instrument module PXI integrated circuit board is fixedly mounted in the described PXI cabinet that is provided with the PXI slot, and described PXI cabinet is connected with computing machine by Express Card or PXI-PCI cable.
The PXI integrated circuit board of described instrument moduleization has 1 to 18, and it is identical with the input/output interface type of attachment of the interior standard measuring instruments of industry that the input/output interface of the PXI integrated circuit board of described instrument moduleization connects; Described PXI integrated circuit board comprises oscillograph integrated circuit board and multimeter integrated circuit board.
Described PXI integrated circuit board also includes digital I/O integrated circuit board, waveform generator integrated circuit board and power supply integrated circuit board.
Described oscillograph integrated circuit board, comprise, memory circuitry, clock circuit, PCI and PXI interface circuit on two analog input channels, data acquisition circuit, A/D change-over circuit, waveform trigger circuit, the plate, described A/D change-over circuit is with waveform to be measured, send memory circuitry on the described plate to by described analog input channel, data acquisition circuit and waveform trigger circuit, output to computing machine by described PCI and PXI circuit.
Described multimeter integrated circuit board, comprise, clock oscillator, steering logic and automatic conversioning broad logical circuit, counter, latch/decipher/drive circuit, the analogue unit circuit, power circuit and buzzer drive circuit, described analogue unit circuit, also comprise, integrator, comparer, analog switch, divider resistance, shunt resistance, measuring resistance, AC/DC converter and range switch, measured physical quantity is by described analogue unit circuit input and described steering logic and automatic conversioning broad logical circuit, send described counter to and latch/decipher/drive circuit, output to computing machine by described PCI and PXI interface circuit.
Described digital I/O integrated circuit board, comprise, acquisition memory, vector generates engine circuit, the trigger event control circuit, vector is gathered the time sequence control logic circuit, vector generates the time sequence control logic circuit, generate storer, the test pin circuit, gather the threshold voltage control circuit, generate the threshold voltage control circuit, clock generator circuit, the data comparison module circuit, numerical data/control signal connector and pci interface circuit, measurement data is through described acquisition memory, vector generates engine circuit, trigger event control circuit and vector are gathered the time sequence control logic circuit and are sent described generation storer to, the test pin circuit, gather the threshold voltage control circuit, generate the threshold voltage control circuit, clock generator circuit, the data comparison module circuit is exported to described data comparison module circuit, numerical data/control signal connector and pci interface circuit, the maximum sampling clock frequency of described digital I/O integrated circuit board is 100MHz.
Described waveform generator integrated circuit board, comprise, comprise the pci interface circuit, memory circuitry on the plate, waveform generation engine circuit, the trigger event control circuit, digital gain circuits, digital filtering and DAC change-over circuit, the analog output channel circuit, clock generator circuit and switch matrix circuit, memory stores is the Wave data and the generation instruction of the equipment that will be loaded on the plate, clock generator circuit generates sampling clock and reference clock, waveform generation engine circuit is by described sampling clock and reference clock, according to exporting behind the memory search Wave data on the external trigger state slave plate, the waveform of output, after processing such as digital gain circuits and digital filtering, be sent to the DAC change-over circuit, through outputing on the panel of control linkage device after the filtering amplification, simultaneously, digital waveform also can be by the output of control linkage device panel.
Described power supply integrated circuit board, comprise, external power source, buffer circuit, current rectifying and wave filtering circuit, sample circuit, reference power circuit, A/D, the D/A change-over circuit, the FPGA circuit, PWM control circuit of duty ratio and interface circuit, after described external power source is isolated through the Darlington transistor buffer circuit, pass through current rectifying and wave filtering circuit again, regulate the scope of the output voltage of described power supply integrated circuit board by the FPGA circuit, the output voltage of power supply integrated circuit board, by the A/D passage, output voltage to described power supply integrated circuit board, current status carries out real-time sampling and monitors, and send sampled data to the FPGA circuit, after FPGA circuit realization D/A conversion, control the continuous variation of described power supply integrated circuit board output voltage again through the PWM control circuit of duty ratio.
The pci interface chip of the PXI integrated circuit board of described instrument moduleization is PCI9054.
The invention has the beneficial effects as follows, based on the PXI technology platform, several electronic surveyings and analytical instrument combine with the PXI integrated circuit board of instrument moduleization, pass through computing machine, can realize control to electronic surveying and analytical instrument, thereby, realize functions such as data acquisition, data storage and data analysis, save time, easy to use; Improve the miniaturization and the mobility of General Purpose Laboratory platform, improved the ability that conforms; The interface is brief, easy operating.
Description of drawings
Fig. 1 is the block scheme that the removable laboratory of the present invention is formed;
Fig. 2 is the portable Laboratory Instruments modularization of a present invention PXI integrated circuit board synoptic diagram;
Fig. 3 is that the portable laboratory of the present invention oscillograph modularization PXI integrated circuit board is formed synoptic diagram;
Fig. 4 is that the portable laboratory of the present invention digital multimeter modularization PXI integrated circuit board is formed synoptic diagram;
Fig. 5 is that the portable laboratory of the present invention numeral I/O modularization PXI integrated circuit board is formed synoptic diagram;
Fig. 6 is that the portable laboratory of the present invention waveform generator modularization PXI integrated circuit board is formed synoptic diagram;
Fig. 7 is the portable breadboard power module PXI integrated circuit board electricity of a present invention functional-block diagram;
Fig. 8 is the portable breadboard power module PXI integrated circuit board electrical schematic diagram of the present invention;
Fig. 9 is that the FPGA of the portable breadboard power module PXI integrated circuit board of the present invention realizes PWM configuration principle block scheme;
Figure 10 is the PXI interface circuit functional-block diagram of the portable breadboard power module PXI integrated circuit board of the present invention;
Figure 11 is connection side's block diagram of the local bus circuit of the portable breadboard power module PXI integrated circuit board of the present invention;
Figure 12 is the excess voltage protection schematic diagram of the portable breadboard power module PXI integrated circuit board of the present invention;
Figure 13 is the circuit overcurrent protection schematic diagram of the portable breadboard power module PXI integrated circuit board of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
For overcoming laboratory platform in the universal electric industry, deficiency such as poor mobility, accommodative ability of environment are low, the present invention is intended to realize portable experiment porch, improves the movability of General Purpose Laboratory platform, improves the ability that conforms.
With the multiple instrument and equipment modularization in original laboratory, promptly independent is small-sized PXI integrated circuit board, as oscillograph modularization PXI integrated circuit board, digital multimeter modularization PXI integrated circuit board, digital I/O modularization PXI integrated circuit board, waveform generator modularization PXI integrated circuit board and power module PXI integrated circuit board etc.The left side is the input/output terminal of integrated circuit board.The input/output interface of these modularization integrated circuit boards all with industry in standard measuring instruments general, fully compatible.The right side of these modularization integrated circuit boards then is the general connector plug, and realization is communicated by letter with platform, and these modularizations PXI integrated circuit board all designs with a kind of general agreement, and communication protocol herein is PXI.Then, above-mentioned modular integrated circuit board is installed on the general PXI mobile laboratory platform of same protocol, platform is connected with computing machine by Express Card or PXI-PCI cable then, supporting again use mobile laboratory Control Software, the transmitted in both directions of realization data, instruction.This laboratory platform and notebook or desktop computer communicate, and can realize the control of every kind of measurement or analytical instrument, thereby, realize general test, measurement function.Be convenient to the data of measuring are carried out data acquisition, storage, and, data analysis etc.Mobile laboratory's external member that Control Software is write based on Lab VIEW, measure or the PXI integrated circuit board of analytical instrument type all has independently Control Software for every kind, can select the modularization PXI integrated circuit board of one or more types inequality according to the measurement demand, finish the collection of modularization PXI integrated circuit board detecting information and the transmission of measuring instruction.
Fig. 1 is the block scheme that the removable laboratory of the present invention is formed; Fig. 2 is the portable Laboratory Instruments modularization of a present invention PXI integrated circuit board synoptic diagram; As shown in Figure 1 and Figure 2, a kind of portable laboratory of the present invention comprises, the PXI integrated circuit board of instrument moduleization, PXI cabinet and computing machine; Described instrument module PXI integrated circuit board is fixedly mounted in the described PXI cabinet that is provided with the PXI slot, and described PXI cabinet is connected with computing machine by Express Card or PXI-PCI cable.The PXI integrated circuit board of described instrument moduleization has 1 to 18, and it is identical with the input/output interface type of attachment of the interior standard measuring instruments of industry that the input/output interface of the PXI integrated circuit board of described instrument moduleization connects.Described PXI integrated circuit board comprises oscillograph integrated circuit board, multimeter integrated circuit board, digital I/O integrated circuit board, waveform generator integrated circuit board and power supply integrated circuit board.The pci interface chip PCI9054 of the PXI integrated circuit board of instrument moduleization.
Fig. 3 is that the portable laboratory of the present invention oscillograph modularization PXI integrated circuit board is formed synoptic diagram; As shown in Figure 3, the oscillograph integrated circuit board, comprise, memory circuitry, clock circuit, PCI and PXI interface circuit on two analog input channels, data acquisition circuit, A/D change-over circuit, waveform trigger circuit, the plate, described A/D change-over circuit is with waveform to be measured, send memory circuitry on the described plate to by described analog input channel, data acquisition circuit and waveform trigger circuit, output to computing machine by described PCI and PXI circuit; This integrated circuit board has two analog input channels, the simulating signal of input will be passed through operations such as waveform triggering, data acquisition, A/D conversion, digitized data are preserved register onboard, in the conversion of arriving PXI through PCI, the backboard of data through the PXI of PXI agreement and platform communicated, and show the image data waveform by the PC display; Graphical interface of user (GUI) software of supporting hommization simultaneously makes things convenient for the user that the Measurement and analysis of image data is handled.
Fig. 4 is that the portable laboratory of the present invention digital multimeter modularization PXI integrated circuit board is formed synoptic diagram; As shown in Figure 4, the multimeter integrated circuit board, comprise, clock oscillator, steering logic and automatic conversioning broad logical circuit, counter, latch/decipher/drive circuit, the analogue unit circuit, power circuit and buzzer drive circuit, described analogue unit circuit, also comprise, integrator, comparer, analog switch, divider resistance, shunt resistance, measuring resistance, AC/DC converter and range switch, measured physical quantity is by described analogue unit circuit input and described steering logic and automatic conversioning broad logical circuit, send described counter to and latch/decipher/drive circuit, output to computing machine by described PCI and PXI interface circuit.The inside of this digital multimeter modularization PXI integrated circuit board mainly comprises, clock oscillator, steering logic and automatic conversioning broad logic, counter, latchs/decipher/driver, simulates part (integrator, comparer, analog switch etc.), power unit, buzzer drive circuit; Peripheral component mainly comprises quartz crystal.LCD, hummer, divider resistance, shunt resistance, measuring resistance, AC/DC converter, range switch, power supply etc.; Graphical interface of user (GUI) software of supporting hommization simultaneously makes things convenient for the user that the Measurement and analysis of image data is preserved.
Fig. 5 is that the portable laboratory of the present invention numeral I/O modularization PXI integrated circuit board is formed synoptic diagram; As shown in Figure 5, numeral I/O integrated circuit board, comprise, the pci interface circuit, acquisition memory, vector generates engine circuit, the trigger event control circuit, vector is gathered the time sequence control logic circuit, vector generates the time sequence control logic circuit, generate storer, the test pin circuit, gather the threshold voltage control circuit, generate the threshold voltage control circuit, clock generator circuit, the data comparison module circuit, numerical data/control signal connector and pci interface circuit, measurement data is through described acquisition memory, vector generates engine circuit, trigger event control circuit and vector are gathered the time sequence control logic circuit and are sent described generation storer to, the test pin circuit, gather the threshold voltage control circuit, generate the threshold voltage control circuit, clock generator circuit, the data comparison module circuit is exported to described data comparison module circuit, numerical data/control signal connector and pci interface circuit, the maximum sampling clock frequency of described digital I/O integrated circuit board is 100MHz.This numeral I/O integrated circuit board can reach 32 digital channels at most, can be used as computer/peripheral interface, pattern generator, logic analyser, or use such as stimuli responsive tester.Maximum sampling clock frequency can reach 100MHz.
Fig. 6 is that the portable laboratory of the present invention waveform generator modularization PXI integrated circuit board is formed synoptic diagram; As shown in Figure 6, the waveform generator integrated circuit board, comprise, comprise the pci interface circuit, memory circuitry on the plate, waveform generation engine circuit, the trigger event control circuit, digital gain circuits, digital filtering and DAC change-over circuit, the analog output channel circuit, clock generator circuit and switch matrix circuit, memory stores is the Wave data and the generation instruction of the equipment that will be loaded on the plate, clock generator circuit generates sampling clock and reference clock, waveform generation engine circuit is by described sampling clock and reference clock, according to exporting behind the memory search Wave data on the external trigger state slave plate, the waveform of output, after processing such as digital gain circuits and digital filtering, be sent to the DAC change-over circuit, through outputing on the panel of control linkage device after the filtering amplification, simultaneously, digital waveform also can be by the output of control linkage device panel.
Emphatically the portable breadboard power module PXI integrated circuit board of the present invention is further described in detail below:
Fig. 7 is the portable breadboard power module PXI integrated circuit board functional-block diagram of the present invention; As shown in Figure 7, the power supply integrated circuit board, comprise, external power source, buffer circuit, current rectifying and wave filtering circuit, sample circuit, reference power circuit, A/D, the D/A change-over circuit, the FPGA circuit, PWM control circuit of duty ratio and interface circuit, after described external power source is isolated through the Darlington transistor buffer circuit, pass through current rectifying and wave filtering circuit again, regulate the scope of the output voltage of described power supply integrated circuit board by the FPGA circuit, the output voltage of power supply integrated circuit board, by the A/D passage, output voltage to described power supply integrated circuit board, current status carries out real-time sampling and monitors, and send sampled data to the FPGA circuit, after FPGA circuit realization D/A conversion, control the continuous variation of described power supply integrated circuit board output voltage again through the PWM control circuit of duty ratio.Power module PXI integrated circuit board is the PXI module that a able to programme, flexible, high power and suitable high precision DC test are used, the SMU passage that it is isolated mutually, four-quadrant ± 20V the output that comprises 4 line remote sensing can be provided, each output channel all has a stabilized switch and a linear voltage stabilization part, provide constant-voltage mode and fixed current pattern by the linear voltage stabilization knight, the voltage and current control loop is worked together.In constant current mode, power module PXI integrated circuit board uses as an accurate current source.External power source is as input source; behind boost Darlington transistor isolation, rectifying and wave-filtering; utilize FPGA to realize regulating the scope of the output voltage of power supply; the voltage of output, output is sampled through A/D passage real time monitoring power source voltage electric current, and sampled data is passed to FPGA; the D/A conversion that utilizes FPGA to realize; regulate the continuous variation of PWM dutycycle control output voltage by output, simultaneously, this power supply has superpotential and circuit overcurrent protection.
Fig. 8 is the portable breadboard power module PXI integrated circuit board electrical schematic diagram of the present invention; As shown in Figure 8, the civil power of the input circuit 220V/50Hz of power module PXI integrated circuit board is imported 30V and is exchanged behind transformer, sends into on-off circuit again after full-wave rectification and electrochemical capacitor E2, E3 filtering.E2, E3 get 2200 μ F, its ESR ripple range value that has reduced filter capacitor that uses in parallel.Adopt the tandem type switching power supply in the on-off circuit electricity, pulse-width modulator is SG3524, and device for power switching is 2N6277; circuit is provided with over-voltage over-current protection circuit; when power supply output overvoltage, overcurrent, the direct current of automatic shutdown circuit is imported, thereby reaches the purpose of holding circuit.The frequency of operation of on-off circuit is:
f=1/C9·R17=1/(0.01×10－6×5.1×103)≈20kHz
Output circuit is formed filtering circuit by inductance L 1 and electrochemical capacitor E5, E8, and R5 is a fictitious load.The selection of output filter capacitor is very important, in order to satisfy minimum output ripple and output current requirement, the ESRmax=Δ Vout/ Δ Iout of electric capacity, Δ Vout is the ripple amplitude, Δ Iout is 1/4 of current design requirement, and for this reason, E8 selects CD28 type four end electric capacity for use, can satisfy the output of 5A electric current, ripple is less than 10mV.
Fig. 9 is that the FPGA of the portable breadboard power module PXI integrated circuit board of the present invention realizes PWM configuration principle block scheme; As shown in Figure 9, in the power module PXI integrated circuit board, realize PWM is regulated by FPGA, wherein, d[7:0] the vector electric current and voltage sampled data that is used to higher level AD sample circuit to provide, provide the control signal of regulating dutycycle, the control signal that CS provides for computing machine, CLK is local crystal oscillator frequency, Qout[3:0] vector is four road signals output.This power moduleization PXI integrated circuit board, can obtain the recurrence interval fixes and (can change the PWM switching frequency with the software setting frequency divider, but in case setting completed, then its recurrence interval will be fixed), dutycycle is decided by that control signal, resolving power are 1/256 pwm signal, by pulsewidth latch module, can realize control signal Data[7:0 from computing machine] latch Data[7:0] vector value be used to determine the dutycycle of pwm signal.The local crystal oscillator of CLK is behind the frequency division module frequency division, the counter module and the time delay module that can be in the pwm control circuit provide internal clocking, counter adds 1 when the rising edge of each pulse arrives, when the numerical value of counter is 00H or when being overflowed by 0FFH, when it will jump to 00H, C end output high level is to the set end of igniter module, and output keeps high level always; When the value of latch was identical with count value in the counter, signal will be by comparator module relatively and export the reset terminal of high level to igniter module, so that I7 module output low level when counter overflows once more, repeats said process again.Through rest-set flip-flop, can obtain the opposite pulse width modulated wave of two-way phase place, and can realize interlocking.Time delay module can prevent the conducting of bridge circuit homonymy to pipe, and the pulse output buffer is used to export four tunnel signals that meet design requirement, and CS is the control signal of this module, is used for the output of control signal.FPGA chip in this power moduleization PXI integrated circuit board all adopts the Virtex-5 family chip XCF08P of Xilinx.
Figure 10 is the PXI interface circuit functional-block diagram of the portable breadboard power module PXI integrated circuit board of the present invention; As shown in figure 10, the PXI interface circuit of this power moduleization PXI integrated circuit board adopts special-purpose pci interface chip PCI9054 to realize the PXI Interface design.PCI9054 is the PCI I/O Accelerator by the advanced person of U.S. PLX company production; Accord with PCI 2.2 agreements have adopted advanced data pipeline structure technology; Local bus provides M, C, three kinds of mode of operations of J to adapt to different local processors; Have optional serial eeprom interface, the local bus clock can be asynchronous with pci clock.There are 6 kinds of programmable FIFO PCI9054 inside, to realize the asynchronous operation between zero-waiting burst transfer and local bus and the pci bus; Local clock can reach 50MHz, and asynchronous with the PCI clock.It supports burst and DMA transmission, can work in holotype with under pattern, DMA pattern, and be to use a very widely pci interface chip.Data bus and address bus are multiplexing, are respectively AD0-AD31; Control bus mainly comprises C/BE[0:3] #, FRAME#, IRDY#, DEVSEL#, TRDY#, STOP#, IDSEL#, LOCK#, PAR#, PEER#, SERR#, REQ#, GNT# etc., when hardware connects as long as these ports of PXI interface and PCI9054 correspondence are linked to each other.With the serial EEPROM corresponding port be CS, SK, DI, DO, DI and DO are physical connections in circuit, the configuration of the EEDI/EEDO pin of EEPROM will be noted: when EEPROM not being installed, this pin must be drop-down, pull down resistor with 1k Ω gets final product, and starting back 9054 this moment can be configured by default value; When blank EEPROM was installed, this pin drew on needing; When the good EEPROM of burning was installed, this pin drew on needing.
Figure 11 is connection side's block diagram of the local bus circuit of the portable breadboard power module PXI integrated circuit board of the present invention; As shown in figure 11, the local bus of PCI9054 links to each other with functional module with FPGA respectively in the local bus circuit of power module PXI integrated circuit board.Because what use in functional module is the FIFO buffer, so, do not need the local address bus, only need data bus is connected respectively among two FIFO, the control signal of local bus and the control signal of FIFO are connected among the FPGA, control the read-write of FIFO by FPGA.In order to change the transfer rate of data neatly, in FPGA, call phaselocked loop and come to distribute the read-write clock to FIFO.For the speed and the coupling requirement that cooperate external circuit, the storehouse of having used ISE has here generated PLL (Phase Locked Loop).PLL has low clock skew, and applying flexible just can obtain needed clock frequency by the resize ratio relation.By being set, the 7th of register DMAMODE can enable or forbid outsidely to wait for input control signal READY#, so that PCI9054 works in outside the wait or inner waiting status.When READY# is under an embargo, then between each address of transmitting and data, insert waiting status, its number is by the waiting status counter decision of inside; If READY# enables, then the lasting clock period of READY# signal has determined additional waiting status.The design adopts C pattern READY# to enable mode.According to the sequential chart of PCI9054, during each data transmission, at first send address gating signal ADS#, when bus is ready to then make the READY# signal effective, the beginning data transmission; Otherwise bus is in waiting status.Data are Once you begin transmitted, and end of transmission (EOT) marking signal BLAST# will judge in local bus control, if BLAST# is a high level, then send effective READY# signal, and data continue transmission, otherwise, end data transmission after sending last READY# signal.The detailed process such as the table 1 of state machine conversion.
Table 1: state machine transfer process
The FPGA chip all adopts the Virtex-5 family chip of Xilinx among the present invention, and described fpga chip all adopts the XCF08P chip of Xilinx, has write whole program under ISE software.In Windows operating system, user application visits PCI equipment by driver.In WDM, adopted the driver architecture of layering, bus driver or class driver the bottom directly and equipment come into contacts with, the functions of the equipments driver on the upper strata by coming into contacts with the low layer driver, the function of realization equipment, centre can also have class filter drive program or equipment filter drive program to be used for the filtration or the conversion of data.
Figure 12 is the excess voltage protection schematic diagram of the portable breadboard power module PXI integrated circuit board of the present invention; As shown in figure 12, in the excess voltage protection of power module PXI integrated circuit board, adopt simple RC to absorb circuit.Circuit shown in Figure 12 is parallel to the MOSFET two ends can effectively limits impulse overvoltage.The parameter of electric capacity can be calculated by surveying, and also can choose the MOSFET interelectrode capacity simply 2 times, the parameter of resistance is relevant with switching frequency.
The circuit overcurrent protection schematic diagram of the portable breadboard power module PXI integrated circuit board of Figure 13 the present invention; As shown in figure 13, in the circuit overcurrent protection of power module PXI integrated circuit board, adopt transistor overcurrent protection circuit, R1-R10 is the measuring resistance of 2W 1 Ω, and when electric current surpassed predetermined value, the pressure drop on parallel resistance surpassed 0.7V, triode V11 conducting, at this moment, MOSFET V12 will end because of bearing reverse voltage between the grid source electrode, thereby cut off main circuit; When current value just often, MOSFET V12 normally can not influence the operate as normal of circuit.
The modular power integrated circuit board of the above-mentioned PXI of having slot is installed on the mobile laboratory's platform with PXI backboard, platform is connected with computer by Express Card or PXI-PCI cable then, supporting again use mobile laboratory Control Software, the transmitted in both directions of realization data, instruction.
The present invention is based on the PXI technology platform, several electronic surveyings and analytical instrument combine with the PXI integrated circuit board of instrument moduleization, pass through computing machine, can realize control to electronic surveying and analytical instrument, thereby, realize functions such as data acquisition, data storage and data analysis, save time, easy to use; Improve the miniaturization and the mobility of General Purpose Laboratory platform, improved the ability that conforms; The interface is brief, easy operating.
It is worthy of note; protection scope of the present invention is not limited to above-mentioned instantiation mode; according to basic fundamental design of the present invention; also available essentially identical structure can realize purpose of the present invention; as long as those of ordinary skills need not through creative work; the embodiment that can associate all belongs to protection scope of the present invention.
Claims (9)
1. a portable laboratory is characterized in that, comprises the PXI integrated circuit board of instrument moduleization, PXI cabinet and computing machine; Described instrument module PXI integrated circuit board is fixedly mounted in the described PXI cabinet that is provided with the PXI slot, and described PXI cabinet is connected with computing machine by Express Card or PXI-PCI cable.
2. portable laboratory according to claim 1, it is characterized in that, the PXI integrated circuit board of described instrument moduleization has 1 to 18, and it is identical with the input/output interface type of attachment of the interior standard measuring instruments of industry that the input/output interface of the PXI integrated circuit board of described instrument moduleization connects; Described PXI integrated circuit board comprises oscillograph integrated circuit board and multimeter integrated circuit board.
3. portable laboratory according to claim 2 is characterized in that, described PXI integrated circuit board also includes digital I/O integrated circuit board, waveform generator integrated circuit board and power supply integrated circuit board.
4. portable laboratory according to claim 2, it is characterized in that, described oscillograph integrated circuit board, comprise, memory circuitry, clock circuit, PCI and PXI interface circuit on two analog input channels, data acquisition circuit, A/D change-over circuit, waveform trigger circuit, the plate, described A/D change-over circuit is with waveform to be measured, send memory circuitry on the described plate to by described analog input channel, data acquisition circuit and waveform trigger circuit, output to computing machine by described PCI and PXI circuit.
5. portable laboratory according to claim 2, it is characterized in that, described multimeter integrated circuit board, comprise, clock oscillator, steering logic and automatic conversioning broad logical circuit, counter, latch/decipher/drive circuit, the analogue unit circuit, power circuit and buzzer drive circuit, described analogue unit circuit, also comprise, integrator, comparer, analog switch, divider resistance, shunt resistance, measuring resistance, AC/DC converter and range switch, measured physical quantity is by described analogue unit circuit input and described steering logic and automatic conversioning broad logical circuit, send described counter to and latch/decipher/drive circuit, output to computing machine by described PCI and PXI interface circuit.
6. portable laboratory according to claim 3, it is characterized in that, described digital I/O integrated circuit board, comprise, acquisition memory, vector generates engine circuit, the trigger event control circuit, vector is gathered the time sequence control logic circuit, vector generates the time sequence control logic circuit, generate storer, the test pin circuit, gather the threshold voltage control circuit, generate the threshold voltage control circuit, clock generator circuit, the data comparison module circuit, numerical data/control signal connector and pci interface circuit, measurement data is through described acquisition memory, vector generates engine circuit, trigger event control circuit and vector are gathered the time sequence control logic circuit and are sent described generation storer to, the test pin circuit, gather the threshold voltage control circuit, generate the threshold voltage control circuit, clock generator circuit, the data comparison module circuit is exported to described data comparison module circuit, numerical data/control signal connector and pci interface circuit, the maximum sampling clock frequency of described digital I/O integrated circuit board is 100MHz.
7. portable laboratory according to claim 3, it is characterized in that, described waveform generator integrated circuit board, comprise, comprise the pci interface circuit, memory circuitry on the plate, waveform generation engine circuit, the trigger event control circuit, digital gain circuits, digital filtering and DAC change-over circuit, the analog output channel circuit, clock generator circuit and switch matrix circuit, memory stores is the Wave data and the generation instruction of the equipment that will be loaded on the plate, clock generator circuit generates sampling clock and reference clock, waveform generation engine circuit is by described sampling clock and reference clock, according to exporting behind the memory search Wave data on the external trigger state slave plate, the waveform of output, after processing such as digital gain circuits and digital filtering, be sent to the DAC change-over circuit, through outputing on the panel of control linkage device after the filtering amplification, simultaneously, digital waveform also can be by the output of control linkage device panel.
8. portable laboratory according to claim 3, it is characterized in that, described power supply integrated circuit board, comprise, external power source, buffer circuit, current rectifying and wave filtering circuit, sample circuit, reference power circuit, A/D, the D/A change-over circuit, the FPGA circuit, PWM control circuit of duty ratio and interface circuit, after described external power source is isolated through the Darlington transistor buffer circuit, pass through current rectifying and wave filtering circuit again, regulate the scope of the output voltage of described power supply integrated circuit board by the FPGA circuit, the output voltage of power supply integrated circuit board, by the A/D passage, output voltage to described power supply integrated circuit board, current status carries out real-time sampling and monitors, and send sampled data to the FPGA circuit, realize the D/A conversion by the FPGA circuit after, control the continuous variation of described power supply integrated circuit board output voltage again through the PWM control circuit of duty ratio.
9. according to the portable laboratory of the arbitrary claim of claim 3 to 8, it is characterized in that the pci interface chip of the PXI integrated circuit board of described instrument moduleization is PCI9054.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110096747 CN102279573A (en) | 2011-04-18 | 2011-04-18 | Movable laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110096747 CN102279573A (en) | 2011-04-18 | 2011-04-18 | Movable laboratory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102279573A true CN102279573A (en) | 2011-12-14 |
Family
ID=45105071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110096747 Pending CN102279573A (en) | 2011-04-18 | 2011-04-18 | Movable laboratory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102279573A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680861A (en) * | 2016-01-28 | 2016-06-15 | 哈尔滨威克科技有限公司 | Multichannel parallel analog data collection circuit based on FPGA |
| CN111398795A (en) * | 2020-04-07 | 2020-07-10 | 华北水利水电大学 | FPGA internal DSP unit testing device and using method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133917Y (en) * | 2007-10-12 | 2008-10-15 | 陕西海泰电子有限责任公司 | Portable multifunctional universal tester |
| CN202033439U (en) * | 2011-04-18 | 2011-11-09 | 天津渤海易安泰电子半导体测试有限公司 | Mobile laboratory |
-
2011
- 2011-04-18 CN CN 201110096747 patent/CN102279573A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133917Y (en) * | 2007-10-12 | 2008-10-15 | 陕西海泰电子有限责任公司 | Portable multifunctional universal tester |
| CN202033439U (en) * | 2011-04-18 | 2011-11-09 | 天津渤海易安泰电子半导体测试有限公司 | Mobile laboratory |
Non-Patent Citations (1)
| Title |
|---|
| 《计算机测量与控制》 20081231 范金锁等 基于PXI总线的导弹测试与实验系统 354-356,369 1-9 第16卷, 第3期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680861A (en) * | 2016-01-28 | 2016-06-15 | 哈尔滨威克科技有限公司 | Multichannel parallel analog data collection circuit based on FPGA |
| CN111398795A (en) * | 2020-04-07 | 2020-07-10 | 华北水利水电大学 | FPGA internal DSP unit testing device and using method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202033439U (en) | Mobile laboratory | |
| CN204832351U (en) | Small resistance and insulation resistance's integrated tester | |
| CN103488112B (en) | A kind of multi-Channels Data Acquisition based on time synchronized | |
| CN203520081U (en) | Time-based synchronous multichannel data acquisition instrument | |
| CN101881790A (en) | Intelligent electric power parameter tester | |
| CN111142008B (en) | Circuit board power parameter testing system and method | |
| CN103018543A (en) | High-accuracy multichannel alternating voltage and current detection device | |
| CN109100159A (en) | A kind of vehicle data monitoring and performance analysis system | |
| CN103728510B (en) | Excitation unit on-site test system and method | |
| CN208861171U (en) | The circuit structure of synchronous acquisition protective device whole phasor | |
| CN202383250U (en) | Full-automatic universal test equipment for electric control board | |
| CN206805286U (en) | A kind of device of DCS system simulations amount signal acquisition browsing real-time data | |
| CN106933215B (en) | PXI bus-based universal equivalent device for external interface of telemetry system | |
| CN102279573A (en) | Movable laboratory | |
| CN105548717A (en) | Electrical parameter testing device based on virtual instrument technology | |
| CN211878121U (en) | Circuit board power parameter testing equipment and system | |
| CN203433041U (en) | An electric energy meter provided with a communication function | |
| CN100416282C (en) | Virtual detector for variable frequency speed regulator | |
| CN203788304U (en) | Device for testing function of hardware interface | |
| CN110579732A (en) | System for testing load recognition function | |
| CN103123373A (en) | Electrical parameter testing device | |
| Ji et al. | The design of data acquisition system based on virtual instrument | |
| CN210155335U (en) | Testing device for multimode navigation receiver | |
| CN102375126A (en) | Method, device and system for detecting battery pack sampling module | |
| CN206074674U (en) | A kind of voltage sample circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111214 |