CN108958821A - A kind of implementation method of the flexibility testing system for electronic product production test - Google Patents
A kind of implementation method of the flexibility testing system for electronic product production test Download PDFInfo
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- CN108958821A CN108958821A CN201810759396.6A CN201810759396A CN108958821A CN 108958821 A CN108958821 A CN 108958821A CN 201810759396 A CN201810759396 A CN 201810759396A CN 108958821 A CN108958821 A CN 108958821A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
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- G—PHYSICS
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- G06F15/00—Digital computers in general; Data processing equipment in general
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- G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
- G06F15/7867—Architectures of general purpose stored program computers comprising a single central processing unit with reconfigurable architecture
- G06F15/7871—Reconfiguration support, e.g. configuration loading, configuration switching, or hardware OS
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Abstract
The invention discloses a kind of implementation methods of flexibility testing system for electronic product production test, this method is based on the layering logic layers and modularized design to production test instrument function, it will realize instrument function dispersed distribution required for fc-specific test FC in modules, it can be reset using the function that large-scale programming device is distributed in instrument on each layer in addition to signal condition layer simultaneously, to reach under production test environment, by the software-driven for calling the design IP and instrument of the FPGA in configurable instrument design library, the purpose of the function of test macro can be reset, realize the flexibility of test macro.
Description
Technical field
The present invention relates to electronic product production test fields, and in particular to a kind of flexibility for electronic product production test
The implementation method of test macro.
Background technique
Instrument for electronic product test have passed through the desk-top instrument of number, plate card type since pointer type analogue instrument
The developing stage of virtual instrument.Desk-top instrument has complete man-machine interactive operation panel, and test function project usually all compares
More, dynamic range is big, and measuring accuracy is high, therefore can complete well in laboratory environments, in research and development of products debugging process
Test assignment.
But under production test environment, in order to test a electronic product, it may be necessary to which multiple test instrumentations cooperate
Production test assignment is completed, carrying out measuring system constructing using traditional desk-top instrument there are following some defects
(1) volume is big, and every desk-top instrument has cabinet, power supply and panel, and more desk-top instrument usually require huge machine
Cabinet accommodates.
(2) at high cost, the wasting of resources, instrument may have multiple function, but may only use in production test therein
Several, most instrument function includes all not used with the physics panel of instrument, and which results in huge wastes.
(3) test macro does not have versatility, if there are two product, one of them have a test need to use it is different
Instrument, then entire test macro just needs to build again.
Using NI as the scheme of the plate card type virtual instrument of representative, do not need to develop panel for instrument, all instrument are all
It is inserted in cabinet, also reduces volume to a certain extent, but the solution of cabinet plate card type has following problems:
(1) if the board used is data collecting card (DAQ), user needs oneself to develop modelled signal modulate circuit, than
A current value is such as tested, user has to the sample circuit that design converts the current into voltage, this brings perhaps for user
More extra workloads, and the performance of the signal conditioning module of user's design is also difficult to control, the performance of final test system
Index is difficult to ensure.
(2) if the board used is instrument card, due to being limited to the size of standard PC case, power supply and electromagnetic environment, instrument
The performance indicator of table such as precision and dynamic range are difficult to the degree of desk-top instrument.
Due to drawbacks described above, when using plate card type cabinet solution, the performance indicator of system is difficult to and desk-top instrument
The identical degree of table, while being that the solution of plate card type also has as desk-top instrument cannot when product to be measured changes
General problem.
With the deployment of 5G standard, the world will enter the epoch of all things on earth interconnection, and number will with hundred billion grades of object
Internet of Things can be linked by its internal electric terminal component, it means that the terminal electricity for having Internet of Things to access of a flood tide
The arrival in sub- production epoch, this brings challenges to the production test of future electronic factory, specifically:
(1) product needs wirelessly to access network, it is therefore desirable to do the compliance test of radio frequency；Because product is different,
The variation of the frequency point bandwidth and baseband signal of radio frequency testing can be very big.
(2) product input port signal comes from various sensors, and output port goes to control various types of execution
Device, it is therefore desirable to which the type for the pumping signal that test macro needs the response signal received and needs to generate is also very rich
, while the type for the communication protocol supported also can be very much.
(3) all things on earth interconnects, and the type of product can be very much.Therefore a production line produces multiple product, and continuous thread-changing should
It is normality, this requires test macros to need versatility, and both set of system can be used to test multiple product.
(4) except a small number of personal consumption electronic product such as mobile phones, AR, VR terminal value is higher outer, most product products
It is worth all very low.The cost of test equipment is required also to want low accordingly.
For synthesis, future is that can cover 5G in radio-frequency head for the system requirements of the production test of internet of things product
Eat dishes without rice or wine frequency range entirely, want that signal kinds abundant can be tested in low-frequency range, to have logical in agreement by huge flexibility
Different products is tested with property, while wanting low cost.
In the testing cost of producing line, testing cost not only includes equipment acquisition cost, and there are also operation and maintenance costs.Such as
Fruit can accomplish that test macro general can reduce the testing cost of single-piece there will be effect, because utilization rate of equipment and installations improves, simultaneously
The time for reducing product thread-changing improves the utilization rate of producing line.
And test macro its versatility constructed currently based on special desk-top or plate card type instrument is all limited.
In order to adapt to the test request of following internet of things product production, it is necessary to which research improves test macro when testing different product
Versatility, the both flexibility of test macro.
If we analyze the function of the test macro of a standard, it can be found that its function can have four from top to bottom
Layer:
(1) human-computer interaction interface function is shown for test result and test process operates, both traditional panel feature.
(2) calculation process of response data, the generation of excited data, the real-time control of test process.
(3) conversion of the excited data to pumping signal, the sampling of response signal and data prediction；For analog signal
Speech, that is, AD/DA function.
(4) signal condition function, needs to carry out the conversion of physical quantity, such as photoelectric conversion to measured signal, and Current Voltage turns
It changes.
It is that above-mentioned four kinds of functions of certain one kind measurement are all encapsulated in a cabinet for traditional desk-top instrument,
And it devises biggish dynamic range and is combined to adapt to the application of various tests, such as by electric current and voltage tester application
A DMM table is formed, circuit test ability can be from microampere order to ampere grade.It is compared with desk-top test instrumentation machine, the cabinet of NI
Formula DAQ scheme virtualizes the panel feature of instrument, but it does not have a solution in signal condition layer, and test macro
Operational capability is also by the various limitations of PCI, PXI cabinet.
Therefore, we design a kind of implementation method of flexibility testing system for electronic product production test, realize and survey
Versatility of the test system under production test environment.
Summary of the invention
The object of the invention is that provide a kind of for the soft of electronic product production test to solve the above-mentioned problems
The implementation method of property test macro, by using field programmable gate function, to the instrument function for realizing fc-specific test FC into
Row layering logic layers and modularization distribution design and software-driven encapsulation, define production test system by software to realize
Function, the method for the inexpensive flexibility testing system design that test system hardware resource can be recycled.
The present invention through the following technical solutions to achieve the above objectives:
A kind of implementation method of the flexibility testing system for electronic product production test, comprising:
The method that hardware realization functional plane is layered the instrument function for test, test instrumentation hardware resource is in logic
On be divided into display control layer, data processing and function control layer, data input and output and signal conversion coating and signal condition layer；
Wherein, the display control layer is used for the display and man-machine interactive operation of test result；
The data processing and function control layer are analyzed for realizing the data for generating and responding for the excited data of measurement to be surveyed
The control of amount and test process；
The data input, output and signal conversion coating are used for conversion and input of the pumping signal of output from data to signal
The sampling of response signal and the pretreatment of response signal data；
The signal condition layer is used to improve excitation or corresponding signal in order to which data input, output and signal convert
Layer is handled；
The instrument function that electronic product completes a certain item fc-specific test FC is distributed in each layer, by one in the design function of each layer
Partial function is combined, and realizes the complete instrument function for being directed to a certain class testing；
The logic of each functional hierarchy of instrument is distributed in the modular method on each physical module by hardware realization physical layer,
Including host computer, the main operational of internal setting FPGA and configuration module, software radio transceiver module, simulation AD/DA module
And signal conditioning module；
Wherein, host computer completes the function of the display control layer, and main operational and configuration module complete data control and function
The function of control layer, the main operational and configuration module receive the instruction or test program that host computer transmits, and control coordination
Software radio transceiver module, simulation AD/DA module and signal conditioning module realize test assignment, are used for non-industry standard agreement
Digital signal test excitation and accordingly also completed by main operational and configuration module, and not according to test assignment
Together, the FPGA design in main operational and configuration module and corresponding drive code set can be reconfigured and load；Software without
Line electricity transceiver module completes frequency and penetrates segment data input, output and signal transformation function；Main operational and configuration module pass through high speed
Communication bus is connected to host computer, and software radio modules can use high speed serialization according to data bandwidth difference with AD/DA module
Bus or parallel data bus line are connected to main operational module and configuration module；Corresponding to unlike signal and application scenarios have
Different signal conditioning modules, these signal conditioning modules are connected to core calculations and configuration module by standard serial bus；
Large-scale programming device is used to realize that data processing algorithm is according to tool in interface mode and module to intermodule
The method that the testing requirement of body is reloaded, the main operational and configuration module have the FPGA of enough capacity various to accommodate
The control interface unit of design logic under different testing requirements, the software radio transceiver module and AD/DA module is also adopted
With FPGA, user can redesign the logic in FPGA according to testing requirement, and download in FPGA, to change mould
The algorithm of data processing in the agreement and module of interblock interface；
Used on software embedded system with by the feature operation interface encapsulation of the relevant hardware resource of fc-specific test FC task for
The method of driving, wherein embedded system is that run in the operation and configuration module of core is Embedded operating system；
The relevant hardware resource of fc-specific test FC task is the specific hardware design for realizing a certain class testing task, including data in FPGA
It generates and data receiving processing circuit, the interface circuit with AD/DA module, the interface circuit of software radio transceiver module is believed
The interface circuit of number conditioning module, the direct interface circuit of FPGA and product to be tested；It is described by the relevant hardware of fc-specific test FC task
Resource application function interface encapsulation is that the method for driving refers to that realizing that the manipulation of hardware design function operates all is by hardware
The function modeling that hardware completes fc-specific test FC task is logically a kind of tool method come what is completed by register read-write, and
Tool method realizes that code is write in the operation based on register required for function thus, and is embedded by these code wraps
The driving of instrument under operating system；
On the basis of the hardware and software platform constituted based on aforementioned software and hardware method, for the need of the production test for electronic product
Ask, building for different test assignments can heavily loaded instrument design library, realized in such a way that software re-defines system configuration
The method of expansible flexibility testing system；Wherein, can the design library of heavily loaded instrument refer to operation and configuration module based on core
Software and hardware architecture, the FPGA hardware design IP for the various particular test functionalities of realization developed and it is corresponding operate in it is embedded
The design IP of software-driven and software radio transceiver module and AD/DA module in operating system；It is this to operate in core
Design of hardware and software in operation and configuration module is in other modules such as software radio transceiver module, AD/DA module or signal tune
Particular test functionality can be realized under the cooperation of module by managing, so these designs may be considered and realize fc-specific test FC task
Instrument；Under the constraint of FPGA and the capacity of the program internal memory of main operational configuration module, main operational and configuration module
FPGA and program memory bank can configure IP and the driving of a variety of instrument, and both the test function of a variety of instrument may be implemented in a system
Can, and the function of every kind of instrument is distributed across in modules, multiple instrument functions can be shared same under same module
Hardware resource；The mode that flexibility testing system is realized in such a way that software re-defines system configuration refers to that host computer can be with
System configuration is defined by system configuration file and is recompilated, and the IP of particular meter is downloaded into main operational configuration mould
The FPGA of block downloads to the driving of instrument in the local non-volatile recording medium of main operational configuration module；When main operational and match
When setting the IP for having downloaded multiple instrument in module and driving, with closing AD/DA module, external software radio transceiver module,
And signal conditioning module just constitutes a test macro, and the function of this test macro can be generalized machine more according to test
The difference of task is redefined by way of reloading, and realizes the flexibility of system；The expansible test macro is
Refer to that test macro is constructed with the operation and configuration module of core as system and core, and the core of multiple test macros is transported
Calculation and configuration module can be connected by the bus of extension, and the sharing of the data between realization system is synchronous with event,
And this multiple system can share a host computer, realize the extension of system testing ability.
Preferably, the data processing and function control layer are realized by FPGA and CPU.
Preferably, the signal conditioning module is constructed using MCU and peripheral circuit, pass through standard serial bus 12C
Or IEE488 is connected to main operational and configuration module.
Preferably, being connected between the signal conditioning module by signal bus, communication protocol is for standard agreement or certainly
The parallel agreement of definition.
Preferably, the main operational and configuration module use the SOC chip of Z7000.
Preferably, the Z7000 is in communication with each other by USB or Ethernet interface and host computer, what Z7000 chip carried
Analog channel and standard communication bus are drawn after buffering isolation protective circuit by terminal；FPGA in Z7000 piece is available
IO is open to user also by high-performance terminal after isolation circuit, is used for the higher digital test of requirement of real-time or test
Control.
Preferably, the software radio transceiver module uses high intermediate frequency, become between intermediate frequency and base band using numerically lower
Frequently, there are modulation and demodulation of the DSP for base band data in the module, AD/DA module uses multichannel different bandwidth.
Beneficial effect is: the present invention be based on the layering logic layers and modularized design to production test instrument function,
By instrument function dispersed distribution required for realization fc-specific test FC in modules, while using large-scale programming device
The function that each layer in addition to signal condition layer is distributed in for instrument can be reset, to reach in production test ring
Under border, the software-driven of design IP and instrument by calling the FPGA in configurable instrument design library, so that it may reset
The purpose of the function of test macro realizes the flexibility of test macro.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is module composition connection block diagram of the invention.
The reference numerals are as follows:
1, host computer；2, main operational and configuration module；3, AD/DA module；4, software radio transceiver module；5, USB or with
Too network interface；6, signal conditioning module.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Shown in Figure 1, the present invention provides a kind of realizations of flexibility testing system for electronic product production test
Method, comprising:
The method that hardware realization functional plane is layered the instrument function for test, test instrumentation hardware resource is in logic
On be divided into display control layer, data processing and function control layer, data input and output and signal conversion coating and signal condition layer；
Wherein, the display control layer is used for the display and man-machine interactive operation of test result；
The data processing and function control layer are analyzed for realizing the data for generating and responding for the excited data of measurement to be surveyed
The control of amount and test process；
The data input, output and signal conversion coating are used for conversion and input of the pumping signal of output from data to signal
The sampling of response signal and the pretreatment of response signal data；
The signal condition layer is used to improve excitation or corresponding signal in order to which data input, output and signal convert
Layer is handled；
The instrument function that electronic product completes a certain item fc-specific test FC is distributed in each layer, by one in the design function of each layer
Partial function is combined, and realizes the complete instrument function for being directed to a certain class testing；
The logic of each functional hierarchy of instrument is distributed in the modular method on each physical module by hardware realization physical layer,
Including host computer, the main operational of internal setting FPGA and configuration module, software radio transceiver module, simulation AD/DA module
And signal conditioning module；
Wherein, host computer completes the function of the display control layer, and main operational and configuration module complete data control and function
The function of control layer, the main operational and configuration module receive the instruction or test program that host computer transmits, and control coordination
Software radio transceiver module, simulation AD/DA module and signal conditioning module realize test assignment, are used for non-industry standard agreement
Digital signal test excitation and accordingly also completed by main operational and configuration module, and not according to test assignment
Together, the FPGA design in main operational and configuration module and corresponding drive code set can be reconfigured and load；Software without
Line electricity transceiver module completes frequency and penetrates segment data input, output and signal transformation function；Main operational and configuration module pass through high speed
Communication bus is connected to host computer, and software radio modules can use high speed serialization according to data bandwidth difference with AD/DA module
Bus or parallel data bus line are connected to main operational module and configuration module；Corresponding to unlike signal and application scenarios have
Different signal conditioning modules, these signal conditioning modules are connected to core calculations and configuration module by standard serial bus；
Large-scale programming device is used to realize that data processing algorithm is according to tool in interface mode and module to intermodule
The method that the testing requirement of body is reloaded, the main operational and configuration module have the FPGA of enough capacity various to accommodate
The control interface unit of design logic under different testing requirements, the software radio transceiver module and AD/DA module is also adopted
With FPGA, user can redesign the logic in FPGA according to testing requirement, and download in FPGA, to change mould
The algorithm of data processing in the agreement and module of interblock interface；
Used on software embedded system with by the feature operation interface encapsulation of the relevant hardware resource of fc-specific test FC task for
The method of driving, wherein embedded system is that run in the operation and configuration module of core is Embedded operating system；
The relevant hardware resource of fc-specific test FC task is the specific hardware design for realizing a certain class testing task, including data in FPGA
It generates and data receiving processing circuit, the interface circuit with AD/DA module, the interface circuit of software radio transceiver module is believed
The interface circuit of number conditioning module, the direct interface circuit of FPGA and product to be tested；It is described by the relevant hardware of fc-specific test FC task
Resource application function interface encapsulation is that the method for driving refers to that realizing that the manipulation of hardware design function operates all is by hardware
The function modeling that hardware completes fc-specific test FC task is logically a kind of tool method come what is completed by register read-write, and
Tool method realizes that code is write in the operation based on register required for function thus, and is embedded by these code wraps
The driving of instrument under operating system；
On the basis of the hardware and software platform constituted based on aforementioned software and hardware method, for the need of the production test for electronic product
Ask, building for different test assignments can heavily loaded instrument design library, realized in such a way that software re-defines system configuration
The method of expansible flexibility testing system；Wherein, can the design library of heavily loaded instrument refer to operation and configuration module based on core
Software and hardware architecture, the FPGA hardware design IP for the various particular test functionalities of realization developed and it is corresponding operate in it is embedded
The design IP of software-driven and software radio transceiver module and AD/DA module in operating system；It is this to operate in core
Design of hardware and software in operation and configuration module is in other modules such as software radio transceiver module, AD/DA module or signal tune
Particular test functionality can be realized under the cooperation of module by managing, so these designs may be considered and realize fc-specific test FC task
Instrument；Under the constraint of FPGA and the capacity of the program internal memory of main operational configuration module, main operational and configuration module
FPGA and program memory bank can configure IP and the driving of a variety of instrument, and both the test function of a variety of instrument may be implemented in a system
Can, and the function of every kind of instrument is distributed across in modules, multiple instrument functions can be shared same under same module
Hardware resource；The mode that flexibility testing system is realized in such a way that software re-defines system configuration refers to that host computer can be with
System configuration is defined by system configuration file and is recompilated, and the IP of particular meter is downloaded into main operational configuration mould
The FPGA of block downloads to the driving of instrument in the local non-volatile recording medium of main operational configuration module；When main operational and match
When setting the IP for having downloaded multiple instrument in module and driving, with closing AD/DA module, external software radio transceiver module,
And signal conditioning module just constitutes a test macro, and the function of this test macro can be generalized machine more according to test
The difference of task is redefined by way of reloading, and realizes the flexibility of system；The expansible test macro is
Refer to that test macro is constructed with the operation and configuration module of core as system and core, and the core of multiple test macros is transported
Calculation and configuration module can be connected by the bus of extension, and the sharing of the data between realization system is synchronous with event,
And this multiple system can share a host computer, realize the extension of system testing ability.
The data processing and function control layer are realized by FPGA and CPU.
The software radio transceiver module uses high intermediate frequency, and Digital up and down convert, the module are used between intermediate frequency and base band
Inside there are modulation and demodulation of the DSP for base band data, AD/DA module uses multichannel different bandwidth.
The signal conditioning module is constructed using MCU and peripheral circuit, passes through standard serial bus 12C or IEE488
It is connected to main operational and configuration module.
It is connected between the signal conditioning module by signal bus, communication protocol is standard agreement or customized parallel
Agreement.
It should be noted that the group that the test macro refers to realize the software and hardware resource of specific test assignment
It closes, generally includes computer, instrument, operating system, instrument drive and test application program；The production test of the electronic product
Refer in the manufacturing process of electronic product, it is usually real for the test that the function of electronics semi-finished product or finished product is verified
Existing mode is to be applied pumping signal using test fixture by edge connector or test point, observed the response of product to be tested
Whether the function to determine product is normal；The flexibility testing system refers to, without replacement or seldom more switching test system
Test instrumentation class hardware module, it is only necessary to replace test fixture, the side configured by software definition test macro software and hardware resources
Method realizes reconfiguring for test macro instrument function, to realize the switching of system testing task, reaches with same a set of
Test the purpose of hardware resource test different product.
As preferred embodiment, the main operational and configuration module use the SOC chip of Z7000.
Z7000 is a SOC that ARM operation framework and FPGA combine together, and is provided between FPGA and CPU
Piece in seamless connection, high performance operation and control may be implemented.Z7000 is that core carrys out structure for main operational and configuration module
Build, Z7000 is upper can to run Linux embedded system, Z7000 its pass through USB or Ethernet interface and host computer phase intercommunication
Letter, the included analog channel of Z7000 chip and standard communication bus are drawn after buffering isolation protective circuit by terminal；
The available IO of FPGA in Z7000 piece is open to user also by high-performance terminal after isolation circuit, is mainly used for real-time
More demanding digital test or testing and control, such as the test of digital video port；Module is other than FPGA in piece, also
Spread F PGA, spread F PGA and ARM and between be connected by high-speed bus, the IO of spread F PGA is drawn out to height after buffering
On density terminals, according to the difference of the application, the FPGA of extension can be configured as the data coprocessor of high speed, or abundant
Control and communication interface, to link control software radio transceiver module, AD/DA module so that some complexity signal tune
Manage module；Certain spread F PGA, which also can be configured as both data processing and Communications Control Interface, to have both at the same time.
Software radio transceiver module according to product wireless channel working frequency points difference to be measured is divided into 6G hereinafter, 30 G, and
Tri- kinds of models of 80G, module use the scheme of high intermediate frequency, and Digital up and down convert is used between intermediate frequency and base band；There is DSP to be used in module
The modulation and demodulation of base band data.FPGA is used at the high speed of the interface between the operation configuration module of core and data flow
Reason.
AD/DA module is used for the analog signal ability of expansion system to make up the analog channel ability that Z7000 itself is carried
Deficiency, resource is as follows in AD/DA module:
(1) FPGA be used for data processing, the control of channel and AD/DA and with the operation of core and the communication of configuration module.
(2) dsp chip is to enhance the processing capacities of the data of module.
ADC channel adds up to 84 channels:
A. 16 Bit ADC two panels of 2M rate, every front end 1:16 multiselect switch
B. 20 M rate, 16 bit ADC 4, every front end 1:8 multiselect switch
B. 12 bit ADC two panels of 125M, front end 1:8 multiselect switch
C. 500 M, 8 bit ADC is a piece of, front end 1:4 multiselect switch
The channel DAC has 48
A. 16 channel, 16 bit precision DC DAC
B. 16 channel, 16 bit 200K SPS DAC
C. 16 channel, 16 bit 1.5M SPS DAC
D. 16 channel, 14 bit, 125 M SPS DAC
There are the channel resource of enough ADC and DAC in AD/DA module, while having expansible DRAM card slot in extending
Deposit space.There is optional dsp chip also on plate simultaneously to enhance the processing capacity of the data of module.
Signal conditioning module is constructed using the MCU of low cost, usually utilizes Flash and included AD/DA in the piece of MCU
Repertoire can be fully completed.The conversion of signal conditioning module input/output interface has following three form
1) from simulation to simulation, such situation corresponds to the test situation that signal bandwidth is wider or required precision is relatively high,
MCU is used to control the amplification factor of the switching of signal and the signal of prime.
2) from analog to digital, at this time using ADC or DAC on MCU, some simple measurements can be by module local complete
At, and result is reported by bus.
3) from number to number, mainly play the role of signal level conversion and signal switching.
Due to the main operational and configuration module of the present embodiment, software radio transceiver module, AD/DA module has
FPGA, therefore their function and communication protocol to each other can be redefined, and the signal condition mould of low cost
Block is due to being mounted in test fixture, and when production line production product category changes when thread-changing, test fixture is generally required
Replacement, only needs the type according to signal conditioning module in new fixture at this time, reconfigures the logical of sample of signal or output
The Processing Algorithm in road and signal, the driving under IP and Linux including FPGA, so that it may reach defining by software
The purpose for reconstructing test macro function, realizes the flexibility of test macro.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of implementation method of the flexibility testing system for electronic product production test characterized by comprising
The method that hardware realization functional plane is layered the instrument function for test, test instrumentation hardware resource is in logic
On be divided into display control layer, data processing and function control layer, data input and output and signal conversion coating and signal condition layer；
Wherein, the display control layer is used for the display and man-machine interactive operation of test result；
The data processing and function control layer are analyzed for realizing the data for generating and responding for the excited data of measurement to be surveyed
The control of amount and test process；
The data input, output and signal conversion coating are used for conversion and input of the pumping signal of output from data to signal
The sampling of response signal and the pretreatment of response signal data；
The signal condition layer is used to improve excitation or corresponding signal in order to which data input, output and signal convert
Layer is handled；
The instrument function that electronic product completes a certain item fc-specific test FC is distributed in each layer, by one in the design function of each layer
Partial function is combined, and realizes the complete instrument function for being directed to a certain class testing；
The logic of each functional hierarchy of instrument is distributed in the modular method on each physical module by hardware realization physical layer,
Including host computer, the main operational of internal setting FPGA and configuration module, software radio transceiver module, simulation AD/DA module
And signal conditioning module；
Wherein, host computer completes the function of the display control layer, and main operational and configuration module complete data control and function
The function of control layer, the main operational and configuration module receive the instruction or test program that host computer transmits, and control coordination
Software radio transceiver module, simulation AD/DA module and signal conditioning module realize test assignment, are used for non-industry standard agreement
Digital signal test excitation and accordingly also completed by main operational and configuration module, and not according to test assignment
Together, the FPGA design in main operational and configuration module and corresponding drive code set can be reconfigured and load；Software without
Line electricity transceiver module completes frequency and penetrates segment data input, output and signal transformation function；Main operational and configuration module pass through high speed
Communication bus is connected to host computer, and software radio modules can use high speed serialization according to data bandwidth difference with AD/DA module
Bus or parallel data bus line are connected to main operational module and configuration module；Corresponding to unlike signal and application scenarios have
Different signal conditioning modules, these signal conditioning modules are connected to core calculations and configuration module by standard serial bus；
Large-scale programming device is used to realize that data processing algorithm is according to tool in interface mode and module to intermodule
The method that the testing requirement of body is reloaded, the main operational and configuration module have the FPGA of enough capacity various to accommodate
The control interface unit of design logic under different testing requirements, the software radio transceiver module and AD/DA module is also adopted
With FPGA, user can redesign the logic in FPGA according to testing requirement, and download in FPGA, to change mould
The algorithm of data processing in the agreement and module of interblock interface；
Used on software embedded system with by the feature operation interface encapsulation of the relevant hardware resource of fc-specific test FC task for
The method of driving, wherein embedded system is that run in the operation and configuration module of core is Embedded operating system；
The relevant hardware resource of fc-specific test FC task is the specific hardware design for realizing a certain class testing task, including data in FPGA
It generates and data receiving processing circuit, the interface circuit with AD/DA module, the interface circuit of software radio transceiver module is believed
The interface circuit of number conditioning module, the direct interface circuit of FPGA and product to be tested；It is described by the relevant hardware of fc-specific test FC task
Resource application function interface encapsulation is that the method for driving refers to that realizing that the manipulation of hardware design function operates all is by hardware
The function modeling that hardware completes fc-specific test FC task is logically a kind of tool method come what is completed by register read-write, and
Tool method realizes that code is write in the operation based on register required for function thus, and is embedded by these code wraps
The driving of instrument under operating system；
On the basis of the hardware and software platform constituted based on aforementioned software and hardware method, for the need of the production test for electronic product
Ask, building for different test assignments can heavily loaded instrument design library, realized in such a way that software re-defines system configuration
The method of expansible flexibility testing system；Wherein, can the design library of heavily loaded instrument refer to operation and configuration module based on core
Software and hardware architecture, the FPGA hardware design IP for the various particular test functionalities of realization developed and it is corresponding operate in it is embedded
The design IP of software-driven and software radio transceiver module and AD/DA module in operating system；It is this to operate in core
Design of hardware and software in operation and configuration module is in other modules such as software radio transceiver module, AD/DA module or signal tune
Particular test functionality can be realized under the cooperation of module by managing, so these designs may be considered and realize fc-specific test FC task
Instrument；Under the constraint of FPGA and the capacity of the program internal memory of main operational configuration module, main operational and configuration module
FPGA and program memory bank can configure IP and the driving of a variety of instrument, and both the test function of a variety of instrument may be implemented in a system
Can, and the function of every kind of instrument is distributed across in modules, multiple instrument functions can be shared same under same module
Hardware resource；The mode that flexibility testing system is realized in such a way that software re-defines system configuration refers to that host computer can be with
System configuration is defined by system configuration file and is recompilated, and the IP of particular meter is downloaded into main operational configuration mould
The FPGA of block downloads to the driving of instrument in the local non-volatile recording medium of main operational configuration module；When main operational and match
When setting the IP for having downloaded multiple instrument in module and driving, with closing AD/DA module, external software radio transceiver module,
And signal conditioning module just constitutes a test macro, and the function of this test macro can be generalized machine more according to test
The difference of task is redefined by way of reloading, and realizes the flexibility of system；The expansible test macro is
Refer to that test macro is constructed with the operation and configuration module of core as system and core, and the core of multiple test macros is transported
Calculation and configuration module can be connected by the bus of extension, and the sharing of the data between realization system is synchronous with event,
And this multiple system can share a host computer, realize the extension of system testing ability.
2. a kind of implementation method of the flexibility testing system for electronic product production test according to claim 1, special
Sign is that the data processing and function control layer are realized by FPGA and CPU.
3. a kind of implementation method of the flexibility testing system for electronic product production test according to claim 1, special
Sign is that the signal conditioning module is constructed using MCU and peripheral circuit, passes through standard serial bus 12C or IEE488
It is connected to main operational and configuration module.
4. a kind of implementation method of the flexibility testing system for electronic product production test according to claim 3, special
Sign is, is connected between the signal conditioning module by signal bus, and communication protocol is standard agreement or customized parallel
Agreement.
5. a kind of implementation method of the flexibility testing system for electronic product production test according to claim 1, special
Sign is, the main operational and configuration module use the SOC chip of Z7000.
6. a kind of implementation method of the flexibility testing system for electronic product production test according to claim 5, special
Sign is that the Z7000 is in communication with each other by USB or Ethernet interface and host computer, the included analog channel of Z7000 chip and
Standard communication bus is drawn after buffering isolation protective circuit by terminal；The available IO of FPGA in Z7000 piece is through isolation electricity
It is open to user also by high-performance terminal behind road, it is used for the higher digital test of requirement of real-time or testing and control.
7. a kind of implementation method of the flexibility testing system for electronic product production test according to claim 1, special
Sign is, the software radio transceiver module uses high intermediate frequency, uses Digital up and down convert between intermediate frequency and base band, in the module
There are modulation and demodulation of the DSP for base band data, AD/DA module uses multichannel different bandwidth.
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