CN201107049Y

CN201107049Y - Modularization memory tester

Info

Publication number: CN201107049Y
Application number: CNU2007201027219U
Authority: CN
Inventors: 邸超; 孙德冲
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-30
Filing date: 2007-09-30
Publication date: 2008-08-27
Anticipated expiration: 2017-09-30

Abstract

The utility model relates to a memory testing instrument, in particular to a modularized memory testing instrument, which solves the problems that the prior memory testing instrument has poor universality and is complicated to be reclaimed, and consists of a shell body provided with a sensor and an internal circuit inside the shell body. The internal circuit consists of a data-collecting module and a memory module. The data-collecting module consists of an FPGA control circuit, a signal-conditioning circuit, an A/D sampling circuit and an FIFO buffering circuit. The data-collecting module still consists of a USB main computer and an interface circuit. The memory module is a USB flash drive, the USB flash drive is connected with the USB main computer and the interface circuit through a USB port, and an FPGA configuration interface is arranged on the shell body. The modularized memory testing instrument has simple yet reasonable structure, facilitates the reclaim by adopting a USB flash drive as the carrier for data memory and can store the collected data into the USB flash drive in the form of files in real time and modify the working parameter of the internal circuit on line, thereby avoiding a large number of repeated designs and improving the universality for different testing requirements.

Description

The modular storage tester

Technical field

The utility model relates to the storage testing tool, is applicable to the parameter testing of moving objects such as vehicle, boats and ships, and be used to vibrate, the measurement of overload, shock wave pressure, specifically be a kind of modular storage tester.

Background technology

STORAGE MEASUREMENT TECHNIQUE is the effective means of finishing under special environment condition such as vibration, acceleration, shock wave pressure and moving object parameter testing, has a extensive future.Existing and the matching used storage tester of sensor all is that signal conditioning circuit, A/D sample circuit, memory circuit, control circuit, interface circuit, electric power management circuit etc. are integrated into a circuit module, is potted in the protection housing together with battery, sensor interface, communication interface etc.Reclaim the storage tester after test is finished, data readback is come out by communication interface.Tend to the memory capacity and/or the running parameter of storage tester are proposed different requirements when tested object and test request change, just need redesign and produce new storage tester this moment, and its versatility is reduced greatly, and production cost improves; And have the storage tester now mostly by computer parallel port or serial ports and compunication, and exist aging, the shortcomings such as speed is low, interface definition disunity of interface, be difficult to adapt to the fast development of current computer peripheral interface; In test site, storage tester recovery operation complexity needs to adopt the notebook computer reading of data simultaneously, and these have all improved the requirement to an experiment configuration, and have caused temporal waste.

Summary of the invention

There are problems such as versatility is low, recovery complexity in the utility model in order to solve existing storage tester, and a kind of modular storage tester of highly versatile is provided.

The utility model is to adopt following technical scheme to realize: the modular storage tester, comprise housing and the interior internal circuit of housing of establishing sensor interface, internal circuit comprises data acquisition module and memory module, data acquisition module comprises the FPGA control circuit, the signal conditioning circuit that input end links to each other with sensor interface, and by the A/D sample circuit that links to each other with the signal conditioning circuit output terminal of FPGA control circuit control, with the FIFO buffer circuit that links to each other with A/D sample circuit output terminal, data acquisition module also comprises usb host and the interface circuit with the FAT32 file system of Windows compatibility of being embedded with that is subjected to FPGA control circuit control, memory module is a USB flash disk, USB flash disk links to each other with usb host and interface circuit by USB interface, and housing is provided with the FPGA configuration interface.

Described FPGA control circuit has as main control unit can online repeated configuration characteristic, when test request changes, can be in advance by its internal logic structure of FPGA configuration interface online modification on the housing, thus change comprise negatively postpone to count, the circuit working parameter of channel gain, sample frequency, triggering level.

In the measuring process, under the control of FPGA control circuit, the usb host direct control is as the memory module-USB flash disk of USB slave unit, because usb host is embedded and the FAT32 file system of Windows compatibility, the data that make data acquisition module measure gained can be saved in the memory module USB flash disk in real time by the form of usb circuit with file; After test is finished, be that USB flash disk reclaims, take the indoor data processing of carrying out to memory module.Described usb host and interface circuit are existing known circuits, are that those skilled in the art are known, can adopt and support the interface chip of usb host function to add microcontroller, and perhaps the usb host of integrated microcontroller is realized.In addition, described signal conditioning circuit, A/D sample circuit, FIFO buffer circuit are known circuits, and those skilled in the art are easy to realize, have multiple modification at different application, therefore it is not described in detail, physical circuit portion (extremely shown in Figure 7 as Fig. 2) only is provided.

Compared with prior art, the utility model adopts modular design, constitute with data acquisition module and memory module, wherein data acquisition module adopts the FPGA control circuit carrying out the work-based logic of whole internal circuit, can by the mode of the online FPGA of reconfiguring change easily comprise negative postpone to count, the running parameter of channel gain, sample frequency, triggering level, the erasable number of times of FPGA control circuit surpasses up to ten thousand times, greatly strengthened the versatility of storage tester, made it can satisfy more applications; In addition, memory module adopts and to be easy to purchase, cheap USB flash disk is as the carrier of data storage, can select different capabilities as required, the on-the-spot recovery conveniently, and can bring back to the indoor deal with data of advancing, remove the process of using the on-the-spot reading of data of notebook computer from, greatly reduced the execute-in-place time; Conveniently be connected, unified the communication interface of retaking of a year or grade data with computing machine; Employing is embedded with the usb host with the FAT32 file system of Windows compatibility, and the data that collect can be saved in the middle of the USB flash disk in real time with document form.Simultaneously, the continuing to increase of current USB flash disk capacity, and the continuous progress aspect data stability, anti-electromagnetic interference (EMI), anti-vibration have all guaranteed feasibility and the reliability of USB flash disk as data storage carrier.

The utility model is simple and reasonable for structure, and as data storage carrier, it is convenient to reclaim with USB flash disk, and can with the data that collect with the form real-time storage of file in the middle of USB flash disk; The running parameter of energy online change internal circuit has been avoided a large amount of design iterations, has improved its versatility at different test requests.

Description of drawings

Fig. 1 is a circuit block diagram of the present invention;

Fig. 2 is a signal conditioning circuit schematic diagram in the internal circuit;

Fig. 3 is an A/D sample circuit schematic diagram in the internal circuit;

Fig. 4 is the circuit theory diagrams of FPGA control circuit and FPGA configuration interface in the internal circuit;

Fig. 5 is the circuit theory diagrams of usb host and interface circuit in the internal circuit;

Fig. 6 is the circuit theory diagrams of FIFO buffer circuit in the internal circuit;

Fig. 7 is the circuit theory diagrams of electric power management circuit in the internal circuit.

Embodiment

The modular storage tester, comprise housing and the interior internal circuit of housing of establishing sensor interface, internal circuit comprises data acquisition module and memory module, data acquisition module comprises the FPGA control circuit, the signal conditioning circuit that input end links to each other with sensor interface, and by the A/D sample circuit that links to each other with the signal conditioning circuit output terminal of FPGA control circuit control, with the FIFO buffer circuit that links to each other with A/D sample circuit output terminal, data acquisition module also comprises usb host and the interface circuit with the FAT32 file system of Windows compatibility of being embedded with that is subjected to FPGA control circuit control, memory module is a USB flash disk, USB flash disk links to each other with usb host and interface circuit by USB interface, and housing is provided with the FPGA configuration interface.

In addition, data acquisition module also comprises battery and electric power management circuit, and housing is provided with charging inlet.In order to improve its anti-vibration, shock resistance, internal circuit is potted in it in housing with epoxy resin, to adapt to the test needs under the specific conditions such as strong vibration, HI high impact, high overload.Described housing is made of the housing of built-in data acquisition module and the housing of built-in memory module, and in together, USB interface is arranged between the two housings two housings by screw retention.Like this, when recovery circuit, only need unload screw, the housing that reclaims built-in memory module gets final product.Those skilled in the art can easily realize the housing of said structure.

As shown in Figure 1, sensor signal is transformed to the analog electrical signal of response with the physical quantity of its perception, is quantified as digital signal through the A/D sample circuit after the signal conditioning circuit conditioning.Under the control of FPGA control circuit, the digital quantity of A/D sample circuit output dumps in the FIFO buffer circuit, is read by usb host when reaching half-full and outputs in the middle of the memory module USB flash disk via usb circuit.Single arrow is represented analog signal flow among the figure, and real triangle arrow is represented data stream, and the real triangle arrow of arc is represented control signal stream.

During concrete enforcement, to shown in Figure 7, the FPGA control circuit selects for use FPGAXC2S50E to realize as Fig. 2, and the configuration interface chip adopts XC18V01PC20.The work schedule and the running parameter of entire circuit are controlled by it.CON3 is the FPGA configured port, has been drawn out to the housing outside.Signal conditioning circuit adopts high performance analog amplifier OPA2340, has realized that electric charge amplifies and filtering is amplified, and the simulating signal after the conditioning offers the A/D sample circuit; The A/D sample circuit has adopted 12 A/D conversion chip AD7472 to realize, its work schedule is fully by the control of FPGA control circuit, and the data that obtain after the A/D conversion are saved in the FIFO buffer circuit; Usb host and interface circuit are made up of ATmega32 chip and usb host chip CH374, wherein USB socket+the 5V power supply supplied with separately by voltage stabilizing chip 7805, and cooperated certain measure, to be stabilized in the system works voltage in the USB flash disk plug process, can be USB interface in addition in actual applications antistatic protection is provided, for example adopt SN75240; ATmega32 adopts onboard clock, and the work clock of CH374 is by the passive crystal oscillator input of 12MHZ; The FIFO buffer circuit adopts IDT72V06, and the 3.3V power supply writes data by FPGA control, when reaching half-full, is responsible for data are read by ATmega32; Electric power management circuit mainly is made of chip TPS70351 and LP2985, and TPS70351 can export the voltage of 3.3V and two passages of 1.8V, can be digital circuit stable operating voltage partly is provided.LP2985 can be artificial circuit part and provides reliably+the 5V operating voltage, LP2985 have enable control, can it be stopped power supply automatically, to reach the economize on electricity effect.

Claims

1, a kind of modular storage tester, comprise housing and the interior internal circuit of housing of establishing sensor interface, it is characterized in that internal circuit comprises data acquisition module and memory module, data acquisition module comprises the FPGA control circuit, the signal conditioning circuit that input end links to each other with sensor interface, and by the A/D sample circuit that links to each other with the signal conditioning circuit output terminal of FPGA control circuit control, with the FIFO buffer circuit that links to each other with A/D sample circuit output terminal, data acquisition module also comprises usb host and the interface circuit with the FAT32 file system of Windows compatibility of being embedded with that is subjected to FPGA control circuit control, memory module is a USB flash disk, USB flash disk links to each other with usb host and interface circuit by USB interface, and housing is provided with the FPGA configuration interface.

2, modular storage tester according to claim 1 is characterized in that described housing is made of the housing of built-in data acquisition module and the housing of built-in memory module, and in together, USB interface is arranged between the two housings two housings by screw retention.