CN201935947U

CN201935947U - Control device for handheld digital oscilloscope

Info

Publication number: CN201935947U
Application number: CN2011200225967U
Authority: CN
Inventors: 李琳; 周国雄
Original assignee: Central South University of Forestry and Technology
Current assignee: Central South University of Forestry and Technology
Priority date: 2011-01-25
Filing date: 2011-01-25
Publication date: 2011-08-17
Anticipated expiration: 2021-01-25

Abstract

The utility model discloses a control device for a handheld digital oscilloscope. The control device comprises a double-channel input device, an analog/digital (AD) module, a field programmable gate array (FPGA) module, a keyboard input device, a liquid crystal display (LCD) display device, an extension (EXT) trigger input device and a universal serial bus (SUB) interface, wherein the double-channel input device is connected with the AD module; the AD module is connected with the FPGA module; and the FPGA module is connected with the keyboard input device and the EXT trigger input device, and is connected with the LCD display device and the USB interface serving as output devices. The control device is small and exquisite, is convenient to carry, and has low power and low energy consumption.

Description

A kind of control device of handheld digital oscillography table

Technical field

The utility model belongs to electronic technology and observation and control technology field, relates to a kind of control device of handheld digital oscillography table.

Background technology

Along with the continuous development of Electronic Testing Technology, the robotization of measuring technology forward, intellectuality, digitized direction develop.Digital storage oscilloscope just progressively replaces the traditional analog oscillograph with its superior performance.But because desk-top oscillograph volume is bigger, is inconvenient to carry and carries out on-the-spot test and field work, hand-held is oscillographic this shortcoming to occur having remedied.It relies on that volume is little, in light weight, powered battery, advantage such as be easy to carry, and occupies a tiny space in the oscillograph field.

The utility model content

The technical matters that the utility model solved is to provide the control device that relates to a kind of handheld digital oscillography table, to solve the shortcoming in the above-mentioned background technology.

The technical matters that the utility model solved realizes by the following technical solutions:

A kind of control device of handheld digital oscillography table, comprise that binary channels input media, AD module, FPGA module, finger-impu system, LCD display device, EXT trigger input media, USB interface, described binary channels input media connects the AD module, the AD module connects the FPGA module, the input media that the FPGA module connects is that finger-impu system and EXT trigger input media, and the output unit that the FPGA module connects is LCD display device and USB interface.

The utility model is a core hardware platform with the FPGA module, makes up 32 NiosII soft-core processors on the platform of FPGA module, and this processor is responsible for the control of acquisition system, keyboard, the Control work of LCD and USB2.0 interface; On the hardware foundation of 32 NiosII soft-core processors, finish

The design of the operation interface of Clinux, the design of user interactions all operations is responsible at this interface.

The principle of work of this handheld digital oscillography meter apparatus is:

Measured signal is from the binary channels input media, carry out the conditioning of direct current biasing through operational amplifier and relay, being converted to can be for the signal of AD module samples processing of circuit, send into the AD modular circuit again, under the control of 32 NiosII soft-core processors, finish the conversion of simulating signal, promptly finish the process of data acquisition to digital signal.The FPGA module determines clock is carried out the frequency division of different numerical value according to the frequency of input in this process, to realize that the real-time sampling bandwidth is 100MHz, the technical indicator of equivalent sampling bandwidth 5GHz.EXT triggers the input media circuit and realizes converting trigger pip to the square wave trigger pip, design external hardware triggering mode, the requirement of the noise suppression that the FPGA module is keyed in according to the size and the user of signal, coupling scheme, High frequency filter is controlled trigger circuit.The digital signal that the DA module is exported is to the conversion of simulating signal, under the control of 32 NiosII soft-core processors, simulating signal is shown the waveform of measuring by LCD display device circuit, and the correlation parameter that measures can directly show output on LCD display device circuit under the control of 32 NiosII soft-core processors, simultaneously, 32 NiosII soft-core processors can carry out the exchange of data by USB interface and host computer.

Beneficial effect

The utlity model has following advantage:

1) small and exquisite, portable, the use of FPGA breaks through the bottleneck of conditional electronic system design, has reduced volume, has improved performance.This device spy is suitable for outdoor and field work, can overcome the problem that desk-top oscillograph inconvenience is moved;

2) low in energy consumption, energy-conservation, the power consumption of FPGA is little, and the stand-by time of this hand-held oscillography table is long;

3) data sampling bandwidth height can realize that a binary channels real-time sampling bandwidth is 100MHz, equivalent sampling bandwidth 5GHz;

4) cost performance height: nuclear resource is very abundant in the FPGA of new generation, can realize the software-hardware synergism design, and great advantage is arranged on application flexibility and price;

5) operating system is easy to use, the reliability height; Clinux with its opening, standardization, good user interface, device independence, abundant network function, reliably security of system, good portability, support characteristics such as kinds of platform to become now preferred operating system in the world.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Referring to Fig. 1, a kind of control device of handheld digital oscillography table, comprise that binary channels input media 1, AD module 2, AD module 3, finger-impu system 4, FPGA module 5, LCD display device 6, EXT trigger input media 7, USB interface 8, described binary channels input media 1 connects AD module 2, AD module 2 connects FPGA module 5, the input media that FPGA module 5 connects is that finger-impu system 4 and EXT trigger input media 7, and the output unit that FPGA module 5 connects is LCD display device 6 and USB interface 8.

Measured signal is from binary channels input media 1, carry out the conditioning of direct current biasing through operational amplifier and relay, being converted to can be for the signal of AD module 2 sample circuits processing, send into AD module 2 circuit again, under the control of 32 NiosII soft-core processors, finish the conversion of simulating signal to digital signal, promptly finish the process of data acquisition, FPGA module 5 determines clock is carried out the frequency division of different numerical value according to the frequency of input in this process, to realize that the real-time sampling bandwidth is 100MHz, the technical indicator of equivalent sampling bandwidth 5GHz, EXT triggers input media 7 circuit and realizes converting trigger pip to the square wave trigger pip, design external hardware triggering mode, FPGA module 5 is according to the size of signal and the noise suppression of user's key entry, coupling scheme, the requirement of High frequency filter is controlled trigger circuit, the digital signal that DA module 3 is exported is to the conversion of simulating signal, under the control of 32 NiosII soft-core processors, simulating signal is shown the waveform of measuring by LCD display device 6 circuit, and the correlation parameter that measures can directly show output on LCD display device 6 circuit under the control of 32 NiosII soft-core processors, simultaneously, 32 NiosII soft-core processors can carry out the exchange of data by USB interface 8 and host computer.

More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof

Claims

1. the control device of a handheld digital oscillography table, comprise that binary channels input media, AD module, FPGA module, finger-impu system, LCD display device, EXT trigger input media, USB interface, it is characterized in that, described binary channels input media connects the AD module, the AD module connects the FPGA module, the input media that the FPGA module connects is that finger-impu system and EXT trigger input media, and the output unit that the FPGA module connects is LCD display device and USB interface.