CN204229154U - A kind of low-frequency high-current source device that can export random waveform - Google Patents
A kind of low-frequency high-current source device that can export random waveform Download PDFInfo
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- CN204229154U CN204229154U CN201420609876.1U CN201420609876U CN204229154U CN 204229154 U CN204229154 U CN 204229154U CN 201420609876 U CN201420609876 U CN 201420609876U CN 204229154 U CN204229154 U CN 204229154U
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Abstract
The utility model proposes a kind of low-frequency high-current source device that can export random waveform, it comprises microprocessor control unit, numerical control amplifying unit and current output unit, microprocessor control unit comprises D/A modular converter, D/A modular converter is used for output voltage signal analog quantity, D/A modular converter output terminal is connected with numerical control amplifying unit input end, numerical control amplifying unit output terminal is connected with current output unit input end, and current output unit output terminal is connected with load.The utility model can produce big current and the adjustable current waveform of waveform.
Description
Technical field
The utility model relates to a kind of supply unit, is specifically related to a kind of low-frequency high-current source device that can export random waveform.
Background technology
The application of current source is boundless, and many occasions need provide current source.Such as wave duct, kinescope, power emission tube etc., their filament cold resistance is very little, when lighting by rated voltage, very large at energising immediate current, and this just needs the current source that can provide rated current to filament; For expensive high-power power valve or require the occasion that the work of electron tube is very stable, just current source supply must be leaned on; Also constant current source is needed during verification reometer; In addition, in research and development and debugging etc. to the measurement of the characteristic such as inductance and electric capacity, electronic experiment and some specific installation, often need input the current source signal of various different wave, some occasion also needs big current.
At present, although market there is various current source, wherein major part is DC current source, and the current source of a small amount of is sine wave output shape, the waveform that the current source of this sine wave output exports is single, and electric current is general also less.Existing equipment is difficult to the demand meeting big current and special waveform.
Utility model content
In order to overcome the defect existed in above-mentioned prior art, the purpose of this utility model is to provide a kind of low-frequency high-current source device that can export random waveform.
The utility model provides a kind of low-frequency high-current source device that can export random waveform, it comprises microprocessor control unit, numerical control amplifying unit and current output unit, described microprocessor control unit comprises D/A modular converter, described D/A modular converter is used for output voltage signal analog quantity, described D/A modular converter output terminal is connected with numerical control amplifying unit input end, described numerical control amplifying unit output terminal is connected with current output unit input end, and described current output unit output terminal is connected with load.
D/A modular converter of the present utility model is used for output voltage signal analog quantity, numerical control amplifying unit carries out amplification and exports, current output unit changes voltage signal into current signal, and the utility model can produce big current and the adjustable current waveform of waveform.
In a kind of preferred implementation of the present utility model, also comprise filter processing unit, the input end of described filter processing unit is connected with the output terminal of D/A modular converter, and the output terminal of described filter processing unit is connected with the input end of numerical control amplifying unit.Leach clutter and high frequency waves by filter processing unit, make output more accurate.
In another kind of preferred implementation of the present utility model, also comprise blue teeth wireless Transmit-Receive Unit, described blue teeth wireless Transmit-Receive Unit is connected with the blue teeth wireless transceiver interface of microprocessor, realizes the communication of external unit and microprocessor.
In a kind of preferred implementation of the present utility model, also comprise current sampling unit and display unit, described microprocessor control unit comprises A/D modular converter, described current output unit output terminal is connected with the input end of current sampling unit, the output terminal of described current sampling unit is connected with the input end of A/D modular converter, the output terminal of described A/D modular converter is connected with display unit, for display translation information of voltage.Be convenient to monitoring in real time and adjustment.
In a kind of preferred implementation of the present utility model, described microprocessor control unit comprises STM32F103RD and peripheral circuit.
In another kind of preferred implementation of the present utility model, also comprise interface unit, described interface unit is connected between described current output unit and described load.Realize the communication of external unit and microprocessor.
In a kind of preferred implementation of the present utility model, the signal input node SignIn of described current output unit is connected with the corresponding output node of numerical control amplifying unit; The node that output node Out1, Out2 are corresponding with output interface unit is respectively connected, and output interface unit connects with external loading; Supply node anode AV+, negative terminal AV-, AGND are respectively with analog power positive pole, the negative pole in power supply unit, be connected in analog.
In another kind of preferred implementation of the present utility model, described current output unit model is integrated transporting discharging LM12.
The utility model chooses 32-bit microprocessor STM32F103RD, LM12 big current amplifier and LCDs, this device is had advantages such as integrated level is high, stable performance, intuitive display.
The utility model have employed Bluetooth wireless transmission module, can realize the wireless transmission realizing data with mobile phone, computer etc. easily, controls output waveform, output amplitude and frequency etc.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit diagram of microprocessor control unit in a kind of preferred implementation of the utility model;
Fig. 3 is the circuit diagram of current output unit in a kind of preferred implementation of the utility model.
Embodiment
Be described below in detail embodiment of the present utility model, 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 utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The utility model provides a kind of low-frequency high-current source device that can export random waveform, it comprises microprocessor control unit, numerical control amplifying unit and current output unit, microprocessor control unit comprises D/A modular converter, D/A modular converter is used for output voltage signal analog quantity, D/A modular converter output terminal is connected with numerical control amplifying unit input end, numerical control amplifying unit output terminal is connected with current output unit input end, and current output unit output terminal is connected with load.
In the present embodiment, D/A modular converter is existing any D/A modular converter, and numerical control amplifying unit can be any existing digital-control amplifier, and D/A modular converter can export the voltage signal analog quantity determining frequency.
In the preferred implementation that the utility model is other, this electric current-producing device also comprises blue teeth wireless Transmit-Receive Unit, this blue teeth wireless Transmit-Receive Unit is connected with the blue teeth wireless transceiver interface of microprocessor, realize the communication of external unit and microprocessor, by the frequency of peripheral equipment control D/A modular converter output voltage, concrete control method can adopt existing method, such as, be the control method disclosed in 201210438740.4 according to application number.
In the present embodiment, microprocessor receives input information and the method for the shape and frequency that control output waveform adopts existing method, the utility model does not carry out any improvement, specifically can be, but not limited to adopt the frequency of control output signal disclosed in patented claim 201310025582.4 and the apparatus and method of amplitude information, although patented claim 201310025582.4 only relates to triangular wave, sinusoidal wave generation, but square wave is easier than sine wave to be produced, and those skilled in the art are easy to obtain square wave on its basis.In addition, the utility model can adopt the method and apparatus obtaining square wave in patented claim 201310043326.8.
In the present embodiment, also comprise filter processing unit, the input end of filter processing unit is connected with the output terminal of D/A modular converter, and the output terminal of filter processing unit is connected with the input end of numerical control amplifying unit.Leach clutter and high frequency waves by filter processing unit, make output more accurate.
In the present embodiment, current sampling unit and display unit can also be comprised, current output unit output terminal is connected with the input end of current sampling unit, the output terminal of current sampling unit is connected with the input end of A/D modular converter, the output terminal of A/D modular converter is connected with display unit, for display translation information of voltage.Be convenient to monitoring in real time and adjustment.
In the present embodiment, also comprise interface unit, interface unit is connected between current output unit and described load.Realize the communication of external unit and microprocessor.
In the present embodiment, microprocessor control unit comprises STM32F103RD and peripheral circuit.The utility model utilizes 32-bit microprocessor to control 12 D/A conversions of interior band, obtain the voltage signal of desired signal, after leaching clutter and high-frequency signal by filter processing unit, output to digital-control amplifier unit, output to current output unit through amplification to realize voltage signal to be converted to current signal, it exports sends into output interface unit, realize the connection with external loading, obtain real-time electric current by output current sampling unit to export simultaneously, and in 32-bit microprocessor controls, 12 A/D of band change, and realize the real-time measurement to output current.On the other hand under control of the microprocessor, utilize blue teeth wireless Transmit-Receive Unit to realize and the news such as mobile phone, computer, and then realize the control of output waveform, frequency etc.
As shown in Figure 1, microprocessor control unit mainly realizes various control, A/D conversion and D/A conversion; The main filtering high frequency interference of filter processing unit, improves output signal accuracy; In the present embodiment, manual adjustments can be carried out to numerical control amplifying unit, also can make digital-control amplifier unit under the control of microprocessor unit, need the amplitude requirement producing signal to select corresponding enlargement factor according to the input of user.Concrete control method is existing method, such as, can adopt method disclosed in patent 200710037470.5.
Current output unit mainly realizes voltage signal to be converted to current signal, and realizes power amplification simultaneously; Output interface unit is formed primarily of lead-out terminal, is convenient to be connected with external loading; Output current sampling unit mainly realizes the electric current of the actual output of Real-time Collection, and is converted into voltage, sends into microprocessor after amplifying simultaneously, utilizes the A/D of band in it conversion to realize the measurement of real-time current; Touch LCD liquid crystal display mainly realizes the input of various information and the display etc. of various output information.Blue teeth wireless Transmit-Receive Unit will realize communication by bluetooth module and miscellaneous equipment such as mobile phone etc., thus reaches the object controlling to export; Power supply unit is mainly each several part work and provides corresponding working power voltage.
User profile is obtained by touch LCD or blue teeth wireless Transmit-Receive Unit, 32-bit microprocessor STM32F103RD controls the simulating signal that the D/A converter that carries exports desired signal, successively by filter processing unit, digital-control amplifier unit, current output unit, output interface unit externally load the current signal of specific waveforms is provided; Obtain real-time output current information by output current sampling unit simultaneously, and in microprocessor with A/D conversion realize the measurement of real-time current.This device, adopts high-performance integrated chip and microprocessor, so be easy to miniaturization, commercialization, in the research and development that can be widely used in electronic circuit related experiment and various relevant device and debugging, has wide market outlook.
In the present embodiment, as shown in Figure 2, microprocessor control unit is formed primarily of the interior 32-bit microprocessor STM32F103RD with A/D and D/A conversion and corresponding peripheral cell.The A/D converter of 3 12,12,2 road D/A converter, 384K byte flash memory, maximum operation frequency is wherein with to reach 72MHz in STM32F103RD.In utilizing, band D/A conversion produces the low frequency signal of random waveform; In utilizing, band A/D conversion realizes the real-time measurement to output current; The 384K byte flash memory of interior band is used for the storage of program.In addition, the information that microprocessor is realized being inputted by touch-screen is simultaneously analyzed, and sends corresponding data or control signal to other parts, and control LCD liquid crystal realizes the display etc. of various relevant information.Node AmpMeasure is connected with the output node of output current sampling unit, by realizing the measurement of output current in microprocessor with A/D conversion.Node SignDA, Filter_CLK are connected with the analog input of filter processing unit, the input of filtering clock respectively, its interior joint SignDA be in microprocessor band D/A conversion through simple filtered analog signal output node.Node AMPCS, AMPDIO, AMPCLK are connected with corresponding node in numerical control amplifying unit respectively.Node B lueRX, BlueTX are connected with the corresponding node in blue teeth wireless Transmit-Receive Unit respectively, realize the communication with external unit.Node DD0---DD7, LCD_DI, LCD_RW, LCD_E, LCD_CSA, LCD_CSB, LCD_REST, LCD_LAMP, LCD_TCS, LCD_TDOUT, LCD_TDIN, LCD_TCLK, LCD_TBUSY, LCD_TPENIRQ is connected with corresponding node in touch LCD liquid crystal display respectively.Interface PSerial is connected with outside serial ports, for the programming of microprocessor.Hummer BUZZ under control of the microprocessor, realizes sending prompt tone when having button to press.Supply node AV3.3V, DV3.3V, DGND, AGND respectively with the analog power 3.3V in power supply unit, digital power 3.3V, digitally, be in analog connected, for this unit provides working power.
As shown in Figure 3, current output unit is made up of high-power amplifier, accurate amplifier and peripheral cell, mainly realizes voltage signal to be converted to current signal, and can provide the driving force of a big current.Integrated transporting discharging LM12 has when power supply is for ± 30V, output current is ± 10A when, voltage can reach ± 25V, and peak dissipation power can reach 800W; When following, frequency bandwidth can reach 700KHz.Input node SignIn is connected with the corresponding output node of numerical control amplifying unit; The node that output node Out1, Out2 are corresponding with output interface unit is respectively connected, and connects with external loading; Supply node AV+5V, AV-5V, AV+30V, AV+30V, AGND respectively with the positive 5V of the analog power in power supply unit ,-5V ,+30V ,-30V, be connected in analog, for this unit provides working power.
As shown in Figure 3, input node SignIn is connected with the node IN+ of integrated transporting discharging LM12 by low-pass filter, and the node IN-of integrated transporting discharging LM12 is connected with the output node OUT of accurate amplifier LMC6081.
It should be noted that; although the microprocessor adopted in the utility model embodiment is STM32F103RD and integrated transporting discharging LM12; but this should not be construed as restriction of the present utility model; any according to technical solutions of the utility model, the processor of the utility model beneficial effect and integrated transporting discharging chip can be realized all within protection domain of the present utility model.
Also it should be noted that, the utility model does not improve software, and its method adopted is prior art or those skilled in the art do not need creative work just obtainable method.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.
Claims (7)
1. one kind can export the low-frequency high-current source device of random waveform, it is characterized in that, comprise microprocessor control unit, numerical control amplifying unit, current output unit and blue teeth wireless Transmit-Receive Unit, described microprocessor control unit comprises D/A modular converter, described D/A modular converter is used for output voltage signal analog quantity, described D/A modular converter output terminal is connected with numerical control amplifying unit input end, described numerical control amplifying unit output terminal is connected with current output unit input end, described current output unit output terminal is connected with load, described blue teeth wireless Transmit-Receive Unit is connected with the blue teeth wireless transceiver interface of microprocessor, realize the communication of external unit and microprocessor.
2. can export the low-frequency high-current source device of random waveform as claimed in claim 1, it is characterized in that, also comprise filter processing unit, the input end of described filter processing unit is connected with the output terminal of D/A modular converter, and the output terminal of described filter processing unit is connected with the input end of numerical control amplifying unit.
3. can export the low-frequency high-current source device of random waveform as claimed in claim 1, it is characterized in that, also comprise current sampling unit and display unit, described microprocessor control unit comprises A/D modular converter, described current output unit output terminal is connected with the input end of current sampling unit, the output terminal of described current sampling unit is connected with the input end of A/D modular converter, and the output terminal of described A/D modular converter is connected with display unit, for display translation information of voltage.
4. can export the low-frequency high-current source device of random waveform as claimed in claim 1, it is characterized in that, described microprocessor control unit comprises STM32F103RD and peripheral circuit.
5. can export the low-frequency high-current source device of random waveform as claimed in claim 1, it is characterized in that, also comprise interface unit, described interface unit is connected between described current output unit and described load.
6. can export the low-frequency high-current source device of random waveform as claimed in claim 1, it is characterized in that, the signal input node SignIn of described current output unit is connected with the corresponding output node of numerical control amplifying unit; The node that output node Out1, Out2 are corresponding with output interface unit is respectively connected, and output interface unit connects with external loading; Supply node anode AV+, negative terminal AV-, AGND are respectively with analog power positive pole, the negative pole in power supply unit, be connected in analog.
7. can export the low-frequency high-current source device of random waveform as claimed in claim 1, it is characterized in that, described current output unit model is integrated transporting discharging LM12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420609876.1U CN204229154U (en) | 2014-10-20 | 2014-10-20 | A kind of low-frequency high-current source device that can export random waveform |
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| CN201420609876.1U CN204229154U (en) | 2014-10-20 | 2014-10-20 | A kind of low-frequency high-current source device that can export random waveform |
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| CN204229154U true CN204229154U (en) | 2015-03-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404343A (en) * | 2015-11-20 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | AC constant current source for current transformer correction |
| CN112527045A (en) * | 2020-12-09 | 2021-03-19 | 武汉海奥电气有限公司 | Modular high-current source capable of outputting arbitrary waveforms |
-
2014
- 2014-10-20 CN CN201420609876.1U patent/CN204229154U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404343A (en) * | 2015-11-20 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | AC constant current source for current transformer correction |
| CN105404343B (en) * | 2015-11-20 | 2017-08-29 | 国网山东省电力公司电力科学研究院 | A kind of AC constant-current source corrected suitable for current transformer |
| CN112527045A (en) * | 2020-12-09 | 2021-03-19 | 武汉海奥电气有限公司 | Modular high-current source capable of outputting arbitrary waveforms |
| CN112527045B (en) * | 2020-12-09 | 2022-05-13 | 武汉海奥电气有限公司 | Modular high-current source capable of outputting arbitrary waveforms |
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