CN204694759U - A kind of voltage signal acquisition device based on mobile phone microphone interface - Google Patents
A kind of voltage signal acquisition device based on mobile phone microphone interface Download PDFInfo
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- CN204694759U CN204694759U CN201520376827.2U CN201520376827U CN204694759U CN 204694759 U CN204694759 U CN 204694759U CN 201520376827 U CN201520376827 U CN 201520376827U CN 204694759 U CN204694759 U CN 204694759U
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Abstract
The utility model provides a kind of voltage signal acquisition device based on mobile phone microphone interface, comprise microphone interface link, voltage signal conversion module and with signals collecting end, described mobile phone is provided with mobile phone terminal microphone interface, described mobile phone terminal microphone interface is flexibly connected with described microphone interface link, described microphone interface link and described transform electrical signals model calling, described transform electrical signals module is connected with described signals collecting end, and described signals collecting end is connected with measured signal source; Described voltage signal conversion module comprises voltage signal and transforms chip, and described voltage signal transforms chip and comprises input end and output terminal, is provided with integrator between described output terminal and input end.Adopt the technical solution of the utility model, the signal collected is not affected by external voltage signal; Only need described voltage signal data harvester to be connected with smart mobile phone, just can realize the collection of the voltage signal data to signal source easily.
Description
Technical field
The utility model relates to a kind of data collector, particularly relates to a kind of voltage signal acquisition device based on mobile phone microphone interface.
Background technology
Along with the fast development of electronic information technology, in many enterprises relevant to electronic information technology, voltage table and oscillograph become indispensable instrument, in fact, have greatly enterprise not need oscillograph that precision is so high and voltage table, company considers that Cost Problems also can not configure a lot of oscillograph and voltage table, causes the exploitation of electronic product extends because of instrument problem.
Meanwhile, voltage table, as the daily survey instrument of one, is often used in every field and carries out voltage measurement work.On the other hand, nowadays various home electronics, has in some specific time and needs to use voltage table simply to detect, but voltage table volume is larger, carry inconvenience, neither as standing family's instrument, so serve inconvenience sometimes can to life band.
Nowadays, mobile phone has become people's routine work and the requisite communication tool of life, and because consumer to be not only confined to the function of single communication aspect for the function that mobile phone possesses, its requirement is more and more higher.If the communication tool of this ubiquity of mobile phone can be utilized to realize the collection of voltage signal, the welcome of consumers in general will be subject to.And the data acquisition line concentration being applied to oscillograph and voltage table at present can not be applied on mobile phone and carries out data acquisition, in addition, interface on current mobile phone all directly can not gather voltage signal, and from a mobile phone being applicable to voltage signal acquisition newly developed, poor universality, cost is high, is only suitable for the crowd of this function of specific needs.And the existing voltage acquisition line that can be applied to mobile phone, the signal collected is easy to inaccurate by external voltage signal affects.
Utility model content
For above technical matters, the utility model provides a kind of voltage signal acquisition device based on mobile phone microphone interface.
To this, the technical solution of the utility model is:
Comprise microphone interface link, voltage signal conversion module and with signals collecting end, described mobile phone is provided with mobile phone terminal microphone interface, described mobile phone terminal microphone interface is flexibly connected with described microphone interface link, described microphone interface link and described transform electrical signals model calling, described transform electrical signals module is connected with described signals collecting end, and described signals collecting end is connected with measured signal source; Described voltage signal conversion module comprises voltage signal and transforms chip, and described voltage signal transforms chip and comprises input end and output terminal, is provided with integrator between described output terminal and input end.Wherein, described voltage signal conversion module is module voltage signal being changed into the frequency signal that mobile phone can identify, described frequency signal is preferably 20Hz ~ 20KHz.
Adopt this technical scheme, integrator is added in circuit, make voltage signal transform the current source always retentively current potential of chip output, voltage does not change, so the result obtained has the very high linearity with the change of the electric signal of measured signal source and Mike's signal input interface end.If not this integrator, the output impedance of output terminal can cause the conversion of V/F voltage signal to produce nonlinearity erron, and it makes output current change with the change of input voltage, thus affects conversion accuracy.
As further improvement of the utility model, described integrator comprises operational amplifier and electric capacity, and described output terminal is connected with input end with operational amplifier through electric capacity.
As further improvement of the utility model, the model of described operational amplifier is LF356.Adopt this technical scheme, conventional operational amplifiers LF356 and electric capacity C1 constitutes an inverse integrator, be added in circuit, because voltage signal transforms the current source always retentively current potential of chip output, voltage not with the electric signal of measured signal source and Mike's signal input interface end change and change, the result that voltage signal can be made to transform the signal conversion of chip has the higher linearity, and the voltage signal data obtained is more accurate.
As further improvement of the utility model, the model that described voltage signal transforms chip is LM331.Described LM331 comprises 8 pins, and wherein pin 1 is output terminal, and pin 7 is input end, and described integrator is located between pin 1 and pin 7.Other 6 pins of described LM331 are respectively: pin 2 is Ref Current reference current end; Pin 3 is F
oUTend, i.e. frequency output terminal; Pin 4 is earth terminal; Pin 5 is R/C end, namely connects RC timing circuit end; Pin 6 is THR end, i.e. threshold value end; Pin 8 is VS end, i.e. power end.
LM331 is the integrated chip that the cost performance of NS company of U.S. production is higher, and it is the simplest current a kind of high precision V/F converter chip, and convert voltage signal to pulse duration frequency signal, output frequency is strictly proportional to input voltage.LM331 is dual inline type 8 pin chip, and the linearity is good, and maximum nonlinear distortion is less than 0.01%, still has linear preferably when frequency of operation is 0.1 Hz; Transduced precision is high, and resolution can reach 16; External circuits is simple, and easily keeps conversion accuracy; LM331, when the power voltage supply of 4.0V, just can work accurately in whole operating temperature range.
As further improvement of the utility model, described transform electrical signals chip is provided with F
oUTend and R/C hold, described microphone interface link respectively with the F of described transform electrical signals chip
oUThold and be connected with R/C end; The input end that described signals collecting end and described voltage signal transform chip is connected.
Compared with prior art, the beneficial effects of the utility model are:
Adopt the technical solution of the utility model, making to be connected to through described voltage signal data harvester the signal that mobile phone microphone interface collects does not affect by external voltage signal; Only need described voltage signal data harvester to be connected with smart mobile phone, just can realize the collection of the voltage signal data to signal source easily; Meanwhile, can also amplify mobile phone can image data scope, and versatility is good, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the module diagram of a kind of embodiment of the utility model;
Fig. 2 is the mimic channel figure of a kind of embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferably embodiment of the present utility model is described in further detail.
Embodiment 1
As depicted in figs. 1 and 2, a kind of voltage signal acquisition device based on mobile phone microphone interface, comprise microphone interface link, voltage signal conversion module and with signals collecting end, described mobile phone is provided with mobile phone terminal microphone interface, described mobile phone terminal microphone interface is flexibly connected with described microphone interface link, described microphone interface link and described transform electrical signals model calling, described transform electrical signals module is connected with described signals collecting end, and described signals collecting end is connected with measured signal source; Described voltage signal conversion module comprises voltage signal and transforms chip, and described voltage signal transforms chip and comprises input end and output terminal, is provided with integrator between described output terminal and input end.
The model that described voltage signal transforms chip is LM331, and described voltage signal transforms chip LM331 8 pins, and wherein pin 1 is output terminal, and pin 7 is input end, and described integrator is located between pin 1 and pin 7; Other 6 pins of described LM331 are respectively: pin 2 is CUAREN end, and pin 3 is F
oUTend, pin 4 is earth terminal, and pin 5 is R/C end, and pin 6 is THR end, and pin 8 is VS end; Described integrator comprises operational amplifier U2A and electric capacity C1, and the model of described operational amplifier U2A is LF356; Described pin 1 is connected with operational amplifier LF356 with pin 7 through electric capacity C1; Described microphone interface link is connected with pin 3 and pin 5 respectively; Described signals collecting end is connected with pin 7.
When reality uses, preferably, described microphone interface link is connected with the microphone interface of Android mobile phone, described signals collecting end is connected with needing the signal source knowing voltage signal, adopt voltage signal acquisition device described in the utility model, the voltage signal that signals collecting end collects can be changed into by described voltage signal conversion module the signal of frequency 20Hz ~ 20KHz that mobile phone can identify.Further, by Android mobile phone AudioRecord sound-recording function hardware own, the AudioRecord sound-recording function of Android mobile phone is coordinated the voltage signal collected accurately to be converted into PCM (the Pulse Code Modulation of nothing compression, pulse code modulation (PCM)) data, make the collection that do not need to carry out a large amount of codes implement data and correlation filtering process.
The embodiment of the above is better embodiment of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence change that all shapes according to the utility model, structure are done is all in protection domain of the present utility model.
Claims (5)
1. the voltage signal acquisition device based on mobile phone microphone interface, it is characterized in that: comprise microphone interface link, voltage signal conversion module and with signals collecting end, described mobile phone is provided with mobile phone terminal microphone interface, described mobile phone terminal microphone interface is flexibly connected with described microphone interface link, described microphone interface link and described transform electrical signals model calling, described transform electrical signals module is connected with described signals collecting end, and described signals collecting end is connected with measured signal source; Described voltage signal conversion module comprises voltage signal and transforms chip, and described voltage signal transforms chip and comprises input end and output terminal, is provided with integrator between described output terminal and input end.
2. voltage signal acquisition device according to claim 1, it is characterized in that: described integrator comprises operational amplifier and electric capacity, described output terminal is connected with input end with operational amplifier through electric capacity.
3. voltage signal acquisition device according to claim 2, is characterized in that: the model of described operational amplifier is LF356.
4. voltage signal acquisition device according to claim 1, is characterized in that: the model that described voltage signal transforms chip is LM331.
5. voltage signal acquisition device according to claim 4, is characterized in that: described transform electrical signals chip is provided with F
oUTend and R/C hold, described microphone interface link respectively with the F of described transform electrical signals chip
oUThold and be connected with R/C end; The input end that described signals collecting end and described voltage signal transform chip is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520376827.2U CN204694759U (en) | 2015-06-03 | 2015-06-03 | A kind of voltage signal acquisition device based on mobile phone microphone interface |
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| CN201520376827.2U CN204694759U (en) | 2015-06-03 | 2015-06-03 | A kind of voltage signal acquisition device based on mobile phone microphone interface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045080A (en) * | 2017-06-20 | 2017-08-15 | 上海闻泰电子科技有限公司 | Voltage check part, intelligent terminal and voltage detection method |
| CN107271750A (en) * | 2017-06-20 | 2017-10-20 | 闻泰通讯股份有限公司 | Current detecting part, intelligent terminal and electric current detecting method |
-
2015
- 2015-06-03 CN CN201520376827.2U patent/CN204694759U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045080A (en) * | 2017-06-20 | 2017-08-15 | 上海闻泰电子科技有限公司 | Voltage check part, intelligent terminal and voltage detection method |
| CN107271750A (en) * | 2017-06-20 | 2017-10-20 | 闻泰通讯股份有限公司 | Current detecting part, intelligent terminal and electric current detecting method |
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Address after: Nanshan District Xili street Shahe road 518000 Shenzhen City, Guangdong province No. 3151 emerging industrial park building A 404-1 Patentee after: Shenzhen Zhenbang intelligent Polytron Technologies Inc Address before: 518000 Guangdong, Nanshan District, Taoyuan, Longjing street, industrial zone, building A, building 2, building A, building on the ground floor, building B, building, building 6, building C, block B, building, building No. 3 Patentee before: SHENZHEN ZHENBANG INTELLIGENT TECHNOLOGY CO., LTD. |