CN103123372A - Signal acquisition unit and current detection device - Google Patents
Signal acquisition unit and current detection device Download PDFInfo
- Publication number
- CN103123372A CN103123372A CN2011103718871A CN201110371887A CN103123372A CN 103123372 A CN103123372 A CN 103123372A CN 2011103718871 A CN2011103718871 A CN 2011103718871A CN 201110371887 A CN201110371887 A CN 201110371887A CN 103123372 A CN103123372 A CN 103123372A
- Authority
- CN
- China
- Prior art keywords
- current
- signal
- gathering unit
- signal gathering
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
Disclosed are a signal acquisition unit and a current detection device. The signal acquisition unit comprises a current acquisition subunit, the current acquisition subunit comprises a resistor, an operational amplifier, a first current input end, a second current input end and a first voltage output end, one end of the resistor is connected with the first current input end, the other end of the resistor is connected with an input end of the operational amplifier and further connected with the second current input end, and an output end of the operational amplifier is connected with the first voltage output end. The signal acquisition unit is simple in structure and supports multi-channel acquisition. In addition, the voltage and current detection device is connected with a display screen or a computer through a GPIB (general purpose interface bus) card, so that output results can be dynamically detected.
Description
Technical field
The present invention relates to a kind of collecting unit, particularly relate to a kind of electrical signal collection unit and current sensing means.
Background technology
In the test of electronic product, often need the voltage and current of testing product, the higher and expensive instrument of some integrated levels plays an important role in the occasion that measuring accuracy is had relatively high expectations.But meanwhile, also there are a large amount of electronic products not too high to the measuring accuracy requirement, also have some product needed multichannels to test simultaneously.In these cases, if hold over many expensive instruments, can cause the waste of resource.Develop a kind of simple in structure, with low cost and support that the proving installation of plurality of voltages current detecting is particularly necessary.So in the proving installation of development support plurality of voltages current detecting, the breakthrough point that a kind of signal gathering unit simple in structure and with low cost is dealt with problems often.Therefore develop a kind of hardware that uses less and support the signal gathering unit of multichannel to have considerable meaning.
Summary of the invention
The present invention is for the signal gathering unit complex structure that overcomes voltage and current detecting devices more of the prior art and does not support the defective of multi pass acquisition, provide a kind of simple in structure and support the signal gathering unit of multi pass acquisition, the voltage and current detecting device that uses this signal gathering unit is not only simple in structure and support multichannel to detect.
The present invention solves above-mentioned technical matters by following technical proposals:
The invention provides a kind of signal gathering unit, its characteristics are, this signal gathering unit comprises a current acquisition subelement, this current acquisition subelement comprises a resistance, an operational amplifier, one first current input terminal, one second current input terminal and one first voltage output end, one end of this resistance is connected with this first current input terminal, the other end of this resistance is connected with an input end of this operational amplifier, the other end of this resistance also is connected with this second current input terminal, and the output terminal of this operational amplifier is connected with this first voltage output end.
Preferably, this signal gathering unit comprises at least two these current acquisition subelements.
the present invention also provides a kind of signal gathering unit, its characteristics are, this signal gathering unit comprises a current acquisition subelement, this current acquisition subelement comprises a resistance, one mutual inductor, one the 5th current input terminal, one the 6th current input terminal and one the 5th voltage output end, the first input end of this mutual inductor is connected with the 5th current input terminal, the second input end of this mutual inductor is connected with the 6th current input terminal, the first output terminal of this mutual inductor is connected with an end of this resistance, the first output terminal of this mutual inductor also is connected with the 5th voltage output end, the second output terminal of this mutual inductor is connected with the other end of this resistance, the second output terminal of this mutual inductor also is connected to the ground and connects.
Preferably, this signal gathering unit comprises at least two these current acquisition subelements.
The present invention also aims to provide a kind of voltage and current detecting device, comprise a Date Conversion Unit and a data processing unit, its characteristics are, this current sensing means also comprises above-mentioned signal gathering unit;
This signal gathering unit is used for gathering current signal;
This Date Conversion Unit is used for this current signal is converted into digital voltage signal;
This data processing unit is used for the acquisition time of this digital voltage signal and this current signal is processed into the demonstration data, and should show that data were sent to a display unit;
This display unit is used for showing that this shows data.
Preferably, this display unit is a display screen or a computer.
Positive progressive effect of the present invention is:
The invention provides a kind of simple in structurely and support the signal gathering unit of multi pass acquisition, the voltage and current detecting device that uses this signal gathering unit is not only simple in structure and support multichannel to detect.In addition, this voltage and current detecting device is connected with display screen or computer by GPIB card (general purpose interface bus card), can realize the detection of dynamic of Output rusults.
Description of drawings
Fig. 1 is the circuit diagram of the first embodiment of signal gathering unit of the present invention.
Fig. 2 is the circuit diagram of the second embodiment of signal gathering unit of the present invention.
Fig. 3 is the circuit diagram of the 3rd embodiment of signal gathering unit of the present invention.
Fig. 4 is the module map of the 4th embodiment of voltage and current detecting device of the present invention.
Embodiment
The first embodiment:
As shown in Figure 1, the present embodiment provides a kind of signal gathering unit 11, and this signal gathering unit 11 only comprises a current acquisition subelement 111, and this current acquisition subelement 111 comprises a resistance R 1, an operational amplifier A 1, one first current input terminal I
in1, one second current input terminal I
in2With one first voltage output end V
Out1, an end of this resistance R 1 and this first current input terminal I
in1Be connected, the other end of this resistance R 1 is connected with an input end of this operational amplifier A 1, the other end of this resistance R 1 also with this second current input terminal I
in2Be connected, the output terminal of this operational amplifier A 1 and this first voltage output end V
Out1Be connected.
Current signal between the negative phase end of these signal gathering unit 11 collection one electric power management circuits in Fig. 1 and the negative phase end of a battery.This first current input terminal I
in1Be connected with the negative phase end of this electric power management circuit, this second current input terminal I
in2Be connected with the negative phase end of this battery, the positive terminal of this electric power management circuit is connected with the positive terminal of this battery, this first voltage output end V
Out1V with a digital to analog converter
in2Input end is connected, and this digital to analog converter is the A/D converter AD7812 that Analog Devices company produces, the in-phase end of this battery and the V of this digital to analog converter
in1Input end is connected.
This digital to analog converter (AD7812) has a plurality of input ends, and those input ends can not input current signal, can only input voltage signal.When this battery discharged and recharged by this electric power management circuit, electric current was by this resistance R 1, and the input end of this operational amplifier A 1 gathers the voltage signal of the other end of this resistance R 1, and outputed to the V of this digital to analog converter after amplifying
in2Input end.Simultaneously, the V of the in-phase end of this battery and this digital to analog converter
in1Input end is connected and can gathers the voltage signal of this battery in-phase end.
This signal gathering unit 11 has only used a resistance R 1 and operational amplifier A 1 just to realize the collection of one road current signal, so this signal gathering unit 11 is simple in structure.
The second embodiment:
The signal gathering unit 11 of the first embodiment has only realized the acquisition function of one road current signal, and in order to realize the collection to the multichannel current signal, the present embodiment has provided signal gathering unit 11 as shown in Figure 2.The present embodiment has the identical part in many places with the signal gathering unit 11 that the first embodiment provides, and these same sections repeat no more herein.And the difference of the present embodiment and the first embodiment only is: the signal gathering unit 11 in Fig. 2 comprises two current acquisition subelements 111.
Fig. 2 gives the situation that this signal gathering unit 11 comprises two current acquisition subelements 111, wherein each current acquisition subelement 111 gathers the current signal between an electric power management circuit and battery, therefore can realize simultaneously the collection of two-way current signal.The in-phase end of above-mentioned two batteries respectively with the V of this digital to analog converter
in1And V
in4Input end is connected, and completes the collection of two-way voltage with this.
The 3rd embodiment:
The present embodiment provides a kind of signal gathering unit 11 that is different from the first embodiment and the second embodiment, as shown in Figure 3, this signal gathering unit 11 comprises a current acquisition subelement 111, and this current acquisition subelement 111 comprises a resistance, a mutual inductor, one the 5th current input terminal I
in5, one the 6th current input terminal I
in6With one the 5th voltage output end V
Out5, the first input end of this mutual inductor and the 5th current input terminal I
in5Be connected, the second input end of this mutual inductor and the 6th current input terminal I
in6Be connected, the first output terminal of this mutual inductor is connected with an end of this resistance, the first output terminal of this mutual inductor also with the 5th voltage output end V
Out5Be connected, the second output terminal of this mutual inductor is connected with the other end of this resistance, and the second output terminal of this mutual inductor also is connected to the ground and connects.
Fig. 3 gives the situation that this signal gathering unit 11 comprises two current acquisition subelements 111, wherein each current acquisition subelement 111 gathers the current signal between an electric power management circuit and battery, so this signal gathering unit 11 can realize the collection of two-way current signal simultaneously.In current acquisition subelement 111 above Fig. 3, the 5th current input terminal I
in5Be connected with a positive terminal of this electric power management circuit, the 6th current input terminal I
in6Be connected with a positive terminal of this battery, the negative phase end of this electric power management circuit is connected with the negative phase end of this battery, the 5th voltage output end V
Out5V with a digital to analog converter (AD7812)
in2Input end is connected, the in-phase end of this electric power management circuit and the V of this digital to analog converter
in1Input end is connected.The current acquisition subelement 111 of Fig. 3 below is similar with the current acquisition subelement 111 of Fig. 3 top, repeats no more herein.
The 4th embodiment:
as shown in Figure 4, the present embodiment provides a kind of voltage and current detecting device 1, comprise a Date Conversion Unit 12 and a data processing unit 13, this current sensing means also comprises the signal gathering unit 11 of the second embodiment or the 3rd embodiment, this signal gathering unit 11 is used for gathering current signal, this Date Conversion Unit 12 is used for this current signal is converted into digital voltage signal, this data processing unit 13 is used for the acquisition time of this digital voltage signal and this current signal is processed into the demonstration data, and should show that data were sent to this display unit, this display unit is used for showing that this shows data.This display unit is a computer 4.By GPIB card (general purpose interface bus card), this voltage and current detecting device 1 is connected with computer 4, and the data of respectively organizing that this voltage and current detecting device 1 is gathered are sent to computer 4 by GPIB card (general purpose interface bus card), finally can realize the detection of dynamic of Output rusults.Fig. 4 has provided this voltage and current detecting device 1 and has gathered the voltage and current signal of an instrument 2 and a laser instrument 3, and realizes that multichannel detects and finally export the situation of detection of dynamic result by computer 4.This voltage and current detecting device 1 also needs to coordinate the software program that runs on this computer 4 usually.This software program is controlled the interface in computer 4 demonstration screen displays one.By this control interface, the display mode of respectively organizing data can be set, for example, show that voltage is with the time dependent curve of curve, voltage or the time dependent curve of electric current of curent change.
Only provided the situation by the final output detection of dynamic of computer 4 result in Fig. 4.In fact, can also data transmission one display screen of respectively organizing that this voltage and current detecting device 1 gathers be shown by GPIB card (general purpose interface bus card).
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (6)
1. signal gathering unit, it is characterized in that, this signal gathering unit comprises a current acquisition subelement, this current acquisition subelement comprises a resistance, an operational amplifier, one first current input terminal, one second current input terminal and one first voltage output end, one end of this resistance is connected with this first current input terminal, the other end of this resistance is connected with an input end of this operational amplifier, the other end of this resistance also is connected with this second current input terminal, and the output terminal of this operational amplifier is connected with this first voltage output end.
2. signal gathering unit as claimed in claim 1, is characterized in that, this signal gathering unit comprises at least two these current acquisition subelements.
3. signal gathering unit, it is characterized in that, this signal gathering unit comprises a current acquisition subelement, this current acquisition subelement comprises a resistance, one mutual inductor, one the 5th current input terminal, one the 6th current input terminal and one the 5th voltage output end, the first input end of this mutual inductor is connected with the 5th current input terminal, the second input end of this mutual inductor is connected with the 6th current input terminal, the first output terminal of this mutual inductor is connected with an end of this resistance, the first output terminal of this mutual inductor also is connected with the 5th voltage output end, the second output terminal of this mutual inductor is connected with the other end of this resistance, the second output terminal of this mutual inductor also is connected to the ground and connects.
4. signal gathering unit as claimed in claim 3, is characterized in that, this signal gathering unit comprises at least two these current acquisition subelements.
5. a current sensing means, comprise a Date Conversion Unit and a data processing unit, it is characterized in that, this current sensing means also comprises signal gathering unit as described in claim 1 or 3;
This signal gathering unit is used for gathering current signal;
This Date Conversion Unit is used for this current signal is converted into digital voltage signal;
This data processing unit is used for the acquisition time of this digital voltage signal and this current signal is processed into the demonstration data, and should show that data were sent to a display unit;
This display unit is used for showing that this shows data.
6. signal gathering unit as claimed in claim 5, is characterized in that, this display unit is a display screen or a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103718871A CN103123372A (en) | 2011-11-21 | 2011-11-21 | Signal acquisition unit and current detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103718871A CN103123372A (en) | 2011-11-21 | 2011-11-21 | Signal acquisition unit and current detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103123372A true CN103123372A (en) | 2013-05-29 |
Family
ID=48454425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103718871A Pending CN103123372A (en) | 2011-11-21 | 2011-11-21 | Signal acquisition unit and current detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103123372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353201A (en) * | 2015-12-14 | 2016-02-24 | 浪潮(北京)电子信息产业有限公司 | Voltage data measurement method and system |
| CN105764184A (en) * | 2016-03-17 | 2016-07-13 | 宁波市江东精诚自动化设备有限公司 | Wireless intelligent dimming switch |
| CN107576903A (en) * | 2017-10-25 | 2018-01-12 | 浙江中控技术股份有限公司 | A kind of current signal output and diagnostic circuit, fault diagnosis method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481217A (en) * | 1994-09-21 | 1996-01-02 | Houston Industries Incorporated | High current test signal converter circuit |
| CN2862049Y (en) * | 2005-11-11 | 2007-01-24 | 西华大学 | Novel electronic current sensor |
| CN101614762A (en) * | 2009-08-03 | 2009-12-30 | 李化 | High precision electric current transducer |
| CN101980030A (en) * | 2010-11-10 | 2011-02-23 | 山东电力集团公司聊城供电公司 | Serial zero load current phase measuring instrument |
-
2011
- 2011-11-21 CN CN2011103718871A patent/CN103123372A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481217A (en) * | 1994-09-21 | 1996-01-02 | Houston Industries Incorporated | High current test signal converter circuit |
| CN2862049Y (en) * | 2005-11-11 | 2007-01-24 | 西华大学 | Novel electronic current sensor |
| CN101614762A (en) * | 2009-08-03 | 2009-12-30 | 李化 | High precision electric current transducer |
| CN101980030A (en) * | 2010-11-10 | 2011-02-23 | 山东电力集团公司聊城供电公司 | Serial zero load current phase measuring instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353201A (en) * | 2015-12-14 | 2016-02-24 | 浪潮(北京)电子信息产业有限公司 | Voltage data measurement method and system |
| CN105764184A (en) * | 2016-03-17 | 2016-07-13 | 宁波市江东精诚自动化设备有限公司 | Wireless intelligent dimming switch |
| CN107576903A (en) * | 2017-10-25 | 2018-01-12 | 浙江中控技术股份有限公司 | A kind of current signal output and diagnostic circuit, fault diagnosis method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201993124U (en) | Multi-channel physical quantity measuring device | |
| CN101776707A (en) | Current detection device | |
| CN204666715U (en) | A kind of electric automobile power battery current detecting system | |
| CN104467854A (en) | Port state acquisition circuit and method | |
| CN203479876U (en) | Digital multimeter based on PXI/PCI bus | |
| CN103123372A (en) | Signal acquisition unit and current detection device | |
| CN103472404A (en) | Grounding detection circuit | |
| CN100360945C (en) | Electric voltage observation circuit | |
| CN103792445A (en) | Fully intelligent electric power overcurrent protection tester | |
| CN102636715B (en) | Integrated electrical test comprehensive testing system | |
| CN218099530U (en) | Fuel cell voltage detection device and detection system | |
| CN103123373A (en) | Electrical parameter testing device | |
| CN102818577A (en) | Automatic test device for frequency characteristic of laser gyro electromechanical assembly | |
| CN102621367A (en) | Pre-amplification circuit for MOA (metal oxide arrester) resistive current detecting system | |
| CN202548225U (en) | Four-channel oscillographic alternating current component recorder | |
| CN103499368A (en) | Device for measuring voltage and temperature of lithium battery pack | |
| CN206490664U (en) | Analog quantity modulate circuit | |
| CN203786285U (en) | Verification device for high voltage live-line display | |
| CN202583352U (en) | Integrated electrical test comprehensive testing system | |
| CN205982398U (en) | Converter is direct current voltage detection circuit for module | |
| CN201654183U (en) | Chip test signal distribution circuit and multiplex chip test system | |
| CN200941111Y (en) | Neutral point resistance information detection recorder | |
| CN202522613U (en) | Single-phase electrical network voltage fundamental wave detection device | |
| CN204666722U (en) | Intelligent digital frequency meter | |
| CN203673046U (en) | Storage battery state display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130529 |