CN202049186U

CN202049186U - Detection module for digital oscilloscope

Info

Publication number: CN202049186U
Application number: CN2011201209247U
Authority: CN
Inventors: 王雁平; 毛国勇; 马金祥
Original assignee: Changzhou Institute of Technology
Current assignee: Changzhou Institute of Technology
Priority date: 2011-04-22
Filing date: 2011-04-22
Publication date: 2011-11-23
Anticipated expiration: 2021-04-22

Abstract

The utility model relates to a detection module for a digital oscilloscope, which comprises an analog switching circuit which is used for inputting analog detection input signal, an attenuation network which is connected with the signal output end of the analog switching circuit, a CPU which is connected with the signal output end of the attenuation network, a USB plug which is connected with a USB interface of the CPU and is used for outputting waveform signal and detection data, a digital to analog converter which is connected with the waveform signal output end of the CPU as well as a buffer amplifier which is connected with the analog signal output end of the digital to analog converter, wherein the buffer amplifier is provided with a waveform analog signal output end. The detection module for the digital oscilloscope is connected with a notebook computer by the USB interface to achieve the functions of an oscilloscope, an alternating-current and direct-current voltage and current meter, a signal generator and a working condition curve recording instrument; and the computer can be used for storing the testing data. The detection module for the digital oscilloscope is applied to developing, detecting and testing electronic products.

Description

A kind of detection module of digital oscilloscope

Technical field

The utility model relates to a kind of detection module of digital oscilloscope.

Background technology

Existing oscillograph is a characteristic of utilizing the electronics oscillatron, and the alternate electrical signal that human eye can't directly be observed converts image to, is presented on the video screen so that the electronic measuring instrument of measuring.It is the requisite important instrument of problem, experiments of measuring result of observing in digital circuit experiment phenomenon, the analysis experiment.Oscillograph is made up of oscillatron and power-supply system, synchro system, X-axis deflection system, Y-axis deflection system, delaying sweep system, standard signal source.

Therefore, existing oscilloscope architecture complexity, production cost height are not easy to portable use.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of detection module of simple in structure, the with low cost and digital oscilloscope that is convenient for carrying.

In order to solve the problems of the technologies described above, the utility model provides a kind of detection module of digital oscilloscope, and it comprises: be used to import the analog switching circuit of analog detection input signal, the attenuation network that links to each other with the signal output part of analog switching circuit, the CPU that links to each other with the signal output part of this attenuation network, with the buffer amplifier that is used for output waveform signals and detects the USB plug that the USB interface of data links to each other, the digital to analog converter that links to each other with the waveform signal output terminal of this CPU, link to each other of this CPU with the analog signal output of this digital to analog converter; The waveform modelling signal output part that this buffer amplifier has.

Technique scheme of the present utility model has the following advantages compared to existing technology: the detection module of (1) digital oscilloscope of the present utility model is realized oscillograph by USB interface and computer notebook, combined-voltage, reometer, signal generator, the function of performance curve registering instrument also utilizes computer to preserve test data (if desired).Be applicable to the electronic product exploitation, detect and test.1), the instrument module this digital oscillograph comprises:: it finishes input, and signal output detects data to the computer transmission, the automatic range conversion; 2), data presentation software package: it realizes that signal waveform shows and storage, and data presentation and storage to the issue an order of instrument module, regularly detect.(2) this module connects and composes a perfect instrument system by USB interface and computer notebook; Because its volume is very little, being easy to carry is that the Electrical Engineer goes out to carry, the good assistant that student's science and technology is made.An instrument module can substitute oscillograph, combined-voltage table, reometer, and conventional instruments such as signal generator, also a more perfect performance curve registering instrument has higher utility.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein

Fig. 1 is the circuit theory diagrams of the detection module of the digital oscilloscope among the embodiment;

Fig. 2 is the procedure chart in detection module when work of described digital oscilloscope;

Fig. 3 is that the detection module 1 of described digital oscilloscope links to each other with notebook computer 2 to constitute the structural representation of digital oscilloscope.

Embodiment

See Fig. 1-3, the detection module of the digital oscilloscope of present embodiment, comprise the analog switching circuit that is used to import the analog detection input signal, the attenuation network that links to each other with the signal output part of analog switching circuit, the CPU that links to each other with the signal output part of this attenuation network, with the buffer amplifier that is used for output waveform signals and detects the USB plug that the USB interface of data links to each other, the digital to analog converter that links to each other with the waveform signal output terminal of this CPU, link to each other of this CPU with the analog signal output of this digital to analog converter; The waveform modelling signal output part that this buffer amplifier has.

CPU selects for use: the instrument module has been selected high speed microprocessor C8051F343 for use, and this is integrated mixed signal, built-in 64KROM and 4KRAM; The inner integrated AD converter of 10 200Kbps, built-in reference power supply; The UBS2.0 communication interface is supported 12Mbps operation at full speed; Order set at a high speed, 70% instruction operation time is 1/48 us(48M clock), promptly every microsecond is carried out 48 instructions;

The hardware circuit function: whole module is divided into the analog detection signal input circuit, waveform modelling signal output apparatus, status display circuit, usb communication circuit.

Analog detection signal input circuit: select 1 multi-channel analog two-way switch that detection signal is sent to attenuation network by 8, after decay, deliver to the input end of AD converter; Microprocessor is by the AD converter image data.

Waveform modelling signal output apparatus: CPU is by DA converter output square wave, sine wave, triangular wave.

Usb communication circuit: CPU passes to host computer (computer notebook) by the usb communication interface with input signal, and by host computer shows signal waveform and data, host computer sends the output waveform instruction by USB interface.

The composition of data presentation software package and function: the whole software system is by usb communication, waveform display window and management, and input signal is handled, the data storing print management, software packages such as output command management;

Usb communication: the hardware driving of USB interface, communication (send and receive) management, the setting of bit rate.

Waveform display window and management: waveform input signal shows that shows signal amplitude and cycle are adjusted, and electric current, voltage value show that command key shows and operational administrative.

Input signal is handled, the data storing print management: generate stores documents automatically for the input data, sequence number is for searching, retrieve, print, storing.

Software packages such as output command management: form control command by the window button, the output of control instrument module waveform.

The characteristic of this detection module:

The integrated level height: the modular circuit volume is little, and function is complete, is easy to carry, and uses various environment to use; Structure is ingenious: module combines with computer, gives full play to the management of computer, Presentation Function, the cost performance that reality is high; Reasonable idea: from hardware to software, conceive carefully, make the total system compactness, not only function is strong, and cost is low; Intelligent design: module can adapt to the range of input signal automatically in detection, whenever one-shot measurement finishes, system all input end is set to minimum sensitivity, avoid high voltage or big electric current infringement module,, select only range automatically by automatic judgement signal intensity, improve measuring accuracy, waveform is stored, can repeated observation (storage oscilloscope function), and adopt control procedure referring to accompanying drawing 2; Simple to operate: owing to can judge range automatically, so during measuring-signal, the operator need not carry out any adjustment; Output waveform is specified by the host computer action pane; Clear display: owing to show that by computer screen is bigger, display resolution higher, more clear (comparing with instrumentation, the instrument of present use).

Obviously, the foregoing description only is for the utility model example clearly is described, and is not to be qualification to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.

Claims

1. the detection module of a digital oscilloscope is characterized in that comprising: be used to import the analog switching circuit of analog detection input signal, the attenuation network that links to each other with the signal output part of analog switching circuit, the CPU that links to each other with the signal output part of this attenuation network, with the buffer amplifier that is used for output waveform signals and detects the USB plug that the USB interface of data links to each other, the digital to analog converter that links to each other with the waveform signal output terminal of this CPU, link to each other of this CPU with the analog signal output of this digital to analog converter; The waveform modelling signal output part that this buffer amplifier has.