CN104374972A - High-accuracy oscilloscope - Google Patents
High-accuracy oscilloscope Download PDFInfo
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- CN104374972A CN104374972A CN201410679519.7A CN201410679519A CN104374972A CN 104374972 A CN104374972 A CN 104374972A CN 201410679519 A CN201410679519 A CN 201410679519A CN 104374972 A CN104374972 A CN 104374972A
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Abstract
The invention discloses a high-accuracy oscilloscope. The oscilloscope comprises an attenuator, a voltage follower, an amplifier, an AD sampling circuit, a controller, a trigger circuit, a clock module, a data register and a displayer. The attenuator, the voltage follower, the amplifier, the AD sampling circuit, the data register and the displayer are sequentially connected, the AD sampling circuit is connected with the clock module and the trigger circuit, and a trigger is connected with the data register and the controller. The attenuator and the amplifier are additionally arranged at the front end of a signal receiver and used for carrying out front end processing on entering signals, entrance of interference signals is reduced, the signal to noise ratio of the signals is kept, and the accuracy of the signals is improved; as the displayer has the touch function, operation in the using process is more convenient, the operation efficiency is improved, internal arrangement is more user-friendly, and the high-accuracy oscilloscope is novel in design and worthy of popularization.
Description
Technical field
The invention discloses a kind of high precision oscillograph, belong to signal handling equipment technical field.
Background technology
Oscillograph is a kind of purposes electronic measuring instrument very widely.It can become invisible converting electrical signal observable image, is convenient to the change procedure that people study various electrical phenomena.Oscillograph utilize narrow, by the molecular electron beam of High-speed Electric, beat on the panel scribbling fluorescent material, just can produce tiny luminous point, this is the principle of work of traditional analog oscilloscope.Under the effect of measured signal, electron beam just looks like the nib of one-pen, can depict the change curve of the instantaneous value of measured signal on panel.Utilize oscillograph can observe the time dependent squiggle of various unlike signal amplitudes, various different electricity can also be tested, as voltage, electric current, frequency, phase differential, AM depth etc. with it.
Oscillograph is the characteristic utilizing electronics oscillatron, converts the alternate electrical signal that human eye cannot directly be observed to image, is presented on video screen so that the electronic measuring instrument measured.It observes problem, the requisite important instrument of experiments of measuring result in digital circuit experiment phenomenon, analysis design mothod.
Along with the development of electronic technology, the progress of signal processing technology, existing equipment and testing tool more and more higher to oscillographic requirement, how to improve oscillographic signal transacting precision and accuracy, become the problem needing most solution at present.
The patent No. is 201210577495.5, and patent name is a kind of oscillograph, and this patent proposes the problem of solution for problem in prior art, but this patent just describes the means realizing oscillograph existing capability, does not propose the mode improved.
The patent No. is 201210509747.0, patent name is a kind of oscillograph, and this patent indicates prior art oscillograph Problems existing, and this patent also just proposes the problem solved from shell, do not provide the mode of how to deal with problems from inside, solve DeGrain.
Summary of the invention
Technical matters to be solved by this invention is: for the defect of prior art, provides a kind of high precision oscillograph, adds attenuator and amplifier in Signal reception front end, carry out front-end processing to the signal entered, and reduces entering of undesired signal.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of high precision oscillograph, comprises attenuator, voltage follower, amplifier, AD sample circuit, controller, trigger circuit, clock module, data buffer, display;
Wherein attenuator, voltage follower, amplifier, AD sample circuit, data buffer, display are connected successively, and AD sample circuit is also connected with clock module, trigger circuit respectively; Described trigger circuit are connected with data buffer, controller respectively;
Input signal enters attenuator, via attenuator, the amplitude of signal and gain are decayed, signal after decay enters amplifier and carries out signal gain amplification after entering voltage follower, signal after amplifying enters AD sample circuit, AD sample circuit is sampled to signal, signal after sampling stored in data buffer, and is shown by display;
Described clock module provides sampling clock for AD sample circuit, and controller control triggering electric circuit starts AD sample circuit and data buffer;
Described display is touch-screen, is provided with operation interface in controller, is shown by display screen, for operation.
As further prioritization scheme of the present invention, the chip model that described attenuator adopts is HMC274.
As further prioritization scheme of the present invention, the chip model of described voltage follower is LM358.
As further prioritization scheme of the present invention, described controller adopts single-chip microcomputer, and the model of described single-chip microcomputer is STC90C51.
As further prioritization scheme of the present invention, the chip that described clock module adopts is DS1302.
As further prioritization scheme of the present invention, also comprise keyboard, described keyboard is connected with controller.
As further prioritization scheme of the present invention, also comprise wave filter, described wave filter is arranged between voltage follower and amplifier, enters amplifier and amplify after the filtering of the signal device after filtering exported via voltage follower.
The present invention adopts above technical scheme compared with prior art, there is following technique effect: the present invention adds attenuator and amplifier in Signal reception front end, front-end processing is carried out to the signal entered, reduces entering of undesired signal, the signal to noise ratio (S/N ratio) of holding signal, improve the degree of accuracy of signal, operation when display is more convenient to use with touch function simultaneously, improve operating efficiency, inside arranges hommization more, modern design, is worthy to be popularized.
Accompanying drawing explanation
Fig. 1 is circuit module connection diagram of the present invention.
Embodiment
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are understandable that, the correlation module related in the present invention and the function of realization thereof are the devices of hardware after improvement and formation thereof, device or system carry computer software programs conventional in prior art or pertinent protocols just can realize, and are not improve computer software programs of the prior art or pertinent protocols.Such as, the computer hardware system after improvement still can realize the specific function of this hardware system by loading existing operation system of software.Therefore, be understandable that, innovation of the present invention is the improvement of hardware module in prior art and connects syntagmatic, but not be only in hardware module for realizing the improvement of software or the agreement of carrying about function.
Those skilled in the art of the present technique are understandable that, the correlation module mentioned in the present invention is the one or more hardware device for performing in step in operation, method, flow process described in the application, measure, scheme.Described hardware device for required object and specialized designs and manufacture, or also can adopt the known device in multi-purpose computer or other known hardware devices.Described multi-purpose computer activates or reconstructs with having storage procedure Selection within it.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in instructions of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " to another element time, it can be directly connected or coupled to other elements, or also can there is intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises one or more arbitrary unit listing item be associated and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of high precision oscillograph, comprises attenuator, voltage follower, amplifier, AD sample circuit, controller, trigger circuit, clock module, data buffer, display to circuit module connection diagram of the present invention;
Wherein attenuator, voltage follower, amplifier, AD sample circuit, data buffer, display are connected successively, and AD sample circuit is also connected with clock module, trigger circuit respectively; Described trigger is connected with data buffer, controller respectively;
Input signal enters attenuator, via attenuator, the amplitude of signal and gain are decayed, signal after decay enters amplifier and carries out signal gain amplification after entering voltage follower, signal after amplifying enters AD sample circuit, AD sample circuit is sampled to signal, signal after sampling stored in data buffer, and is shown by display;
Described clock module provides sampling clock for AD sample circuit, and controller control triggering electric circuit starts AD sample circuit and data buffer;
Described display is touch-screen, is provided with operation interface in controller, is shown by display screen, for operation.
Also can wave filter be set between described voltage follower and amplifier, filtering is carried out to signal, the interference of filtering clutter, also simultaneously or wave filter can be set separately after amplifier simultaneously, be mixed into noise signal in signal after amplification, it is more accurate that the filter range of wave filter will be arranged.
As further prioritization scheme of the present invention, the chip model that described attenuator adopts is HMC274, also can adopt the attenuator that resistance is set up, and concrete which kind of mode that adopts can be selected according to the size of circuit board or the requirement realizing precision.
As further prioritization scheme of the present invention, the chip model of described voltage follower is LM358, voltage follower, as the term suggests, be realize the electron-like element that output voltage follows the change of input voltage.That is, the voltage amplification factor perseverance of voltage follower is less than and close to 1.The distinguishing feature of voltage follower is exactly that input impedance is high, and output impedance is low, improves the load capacity of rear end, improves the carrying capacity of circuit.
As further prioritization scheme of the present invention, described controller adopts single-chip microcomputer, and the model of described single-chip microcomputer is STC90C51.
As further prioritization scheme of the present invention, the chip that described clock module adopts is DS1302, and this chip can directly be connected with single-chip microcomputer, realizes clock, avoids the problem arranging separately clock in single-chip microcomputer inside in the past, goes wrong and be convenient to search.
As further prioritization scheme of the present invention, also comprise keyboard, described keyboard is connected with controller, display in the present invention has contact action function, adds both cooperatings after keyboard, convenient during use, improve operating efficiency, when a side goes wrong, have alternatives.
By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from present inventive concept.The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to technical spirit of the present invention, within the spirit and principles in the present invention, to any simple amendment that above embodiment is done, equivalent replacement and improvement etc., within the protection domain all still belonging to technical solution of the present invention.
Claims (7)
1. a high precision oscillograph, is characterized in that: comprise attenuator, voltage follower, amplifier, AD sample circuit, controller, trigger circuit, clock module, data buffer, display;
Wherein attenuator, voltage follower, amplifier, AD sample circuit, data buffer, display are connected successively, and AD sample circuit is also connected with clock module, trigger circuit respectively; Described trigger circuit are connected with data buffer, controller respectively;
Input signal enters attenuator, via attenuator, the amplitude of signal and gain are decayed, signal after decay enters amplifier and carries out signal gain amplification after entering voltage follower, signal after amplifying enters AD sample circuit, AD sample circuit is sampled to signal, signal after sampling stored in data buffer, and is shown by display;
Described clock module provides sampling clock for AD sample circuit, and controller control triggering electric circuit starts AD sample circuit and data buffer;
Described display is touch-screen, is provided with operation interface in controller, is shown by display screen, for operation.
2. a kind of high precision oscillograph as claimed in claim 1, is characterized in that: the chip model that described attenuator adopts is HMC274.
3. a kind of high precision oscillograph as claimed in claim 1, is characterized in that: the chip model of described voltage follower is LM358.
4. a kind of high precision oscillograph as claimed in claim 3, is characterized in that: described controller adopts single-chip microcomputer, and the model of described single-chip microcomputer is STC90C51.
5. a kind of high precision oscillograph as claimed in claim 1, is characterized in that: the chip that described clock module adopts is DS1302.
6. a kind of high precision oscillograph as claimed in claim 1, it is characterized in that: also comprise keyboard, described keyboard is connected with controller.
7. a kind of high precision oscillograph as claimed in claim 1, it is characterized in that: also comprise wave filter, described wave filter is arranged between voltage follower and amplifier, enters amplifier and amplify after the filtering of the signal device after filtering exported via voltage follower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410679519.7A CN104374972A (en) | 2014-11-25 | 2014-11-25 | High-accuracy oscilloscope |
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| CN201410679519.7A CN104374972A (en) | 2014-11-25 | 2014-11-25 | High-accuracy oscilloscope |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931755A (en) * | 2015-05-08 | 2015-09-23 | 中国电子科技集团公司第四十一研究所 | High resolution digit storage oscilloscope |
| CN106706987A (en) * | 2015-11-16 | 2017-05-24 | 四川航达机电技术开发服务中心 | Digital oscilloscope |
| CN108957293A (en) * | 2018-07-23 | 2018-12-07 | 三门康创电子科技有限公司 | A kind of zero pulse per second (PPS) igniter production detection device |
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| EP0943925A2 (en) * | 1998-03-19 | 1999-09-22 | Ando Electric Co., Ltd. | Electro-optic sampling oscilloscope |
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| CN104931755A (en) * | 2015-05-08 | 2015-09-23 | 中国电子科技集团公司第四十一研究所 | High resolution digit storage oscilloscope |
| CN106706987A (en) * | 2015-11-16 | 2017-05-24 | 四川航达机电技术开发服务中心 | Digital oscilloscope |
| CN108957293A (en) * | 2018-07-23 | 2018-12-07 | 三门康创电子科技有限公司 | A kind of zero pulse per second (PPS) igniter production detection device |
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Application publication date: 20150225 |