CN104678214A - Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type Hall sensor - Google Patents
Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type Hall sensor Download PDFInfo
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- CN104678214A CN104678214A CN201510056217.9A CN201510056217A CN104678214A CN 104678214 A CN104678214 A CN 104678214A CN 201510056217 A CN201510056217 A CN 201510056217A CN 104678214 A CN104678214 A CN 104678214A
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- balance type
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Abstract
The invention relates to an electric quantity digitizer based on a DSP (Digital Signal Processor) and a magnetic balance type Hall sensor. The digitizer is connected to a power grid and comprises a magnetic balance type Hall current sensor and an DSP chip which are connected to each other; the DSP module comprises a detection circuit, a processing circuit and an inhibiting signal output circuit which are sequentially connected; the magnetic balance type Hall current sensor is respectively connected with the power grid, the detection circuit and the inhibiting signal output circuit. Compared with the prior art, the electric quantity digitizer is reasonable in design, simple in structure and low in cost, and the current sensor is directly connected with the DSP control chip to each other without the need of additionally arranging an AD (Analog-to-Digital) conversion device; owing to low power consumption, high operation precision and real-time fast data processing capability of the magnetic balance type Hall sensor and the DSP control chip, the electric energy quality is monitored in real time while the detection precision is effectively improved.
Description
Technical field
The present invention relates to a kind of electricity digitizer, especially relate to a kind of electricity digitizer based on DSP and magnetic balance type Hall element.
Background technology
At present, power quality problem has become the advanced subject of electrical engineering area research, its set electron technology, and multiple subject such as the communication technology and computer technology is in one, and its research level also signifies the national status of scientific and technological level in the world.The lifting of quality of power supply investigative technique is all a Gospel for electrical network and power consumer, because it relates to the every aspect of national product and people's daily life, can help electric company in planning, correctly improve the foundation structure of electricity supplying and using system for Utilities Electric Co. especially, improve system cloud gray model stability and reasonably expand system capacity and determine investment level, there is important pool meaning.And by the continuous monitoring of electrical network associate power parameter and record, set up the efficient database that can characterize the quality of power supply, and can look-ahead failure message, remind the safe condition of people to electricity supply and use equipment to overhaul, be conducive to loss to be reduced to minimum.Microcontroller science and technology fast development simultaneously, particularly along with the development and apply of DSP, makes the quality of power supply be improved in detection, monitoring and analysis etc., and then is conducive to the problem and the rule that find customer power supply, improve the quality of power supply.
Summary of the invention
Object of the present invention is exactly provide a kind of electricity digitizer based on DSP and magnetic balance type Hall element to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of electricity digitizer based on DSP and magnetic balance type Hall element, this converter is connected on electrical network, it is characterized in that, described converter comprises interconnective magnetic balance type Hall current sensor and dsp chip, described dsp chip comprises the testing circuit, treatment circuit and the suppression signal output apparatus that connect successively, and described magnetic balance type Hall current sensor is connected with electrical network, testing circuit and suppression signal output apparatus respectively.
Described magnetic balance type Hall current sensor comprises two, be respectively the first magnetic balance type Hall current sensor and the second magnetic balance type Hall current sensor, the input end of the first described magnetic balance type Hall current sensor is directly connected with electrical network, output terminal is connected with testing circuit, the input end of the second described magnetic balance type Hall current sensor is connected with electrical network by resistance, and output terminal is connected with testing circuit.
Described testing circuit comprises the current detection circuit and voltage detecting circuit that are connected with treatment circuit respectively, described current detection circuit input end is connected with the first magnetic balance type Hall current sensor, and described voltage detecting circuit input end is connected with the second magnetic balance type Hall current sensor.
Each magnetic balance type Hall current sensor comprises primary coil, secondary coil and Hall element end, described primary coil is connected with electrical network, described testing circuit input end is connected with Hall element end, and the output terminal of described suppression signal output apparatus is connected with secondary coil.
Described treatment circuit processes the electric signal gathered, and comprises and calculates electric current, voltage, power and power factor value, and carries out FFT conversion to the signal gathered, and calculates each harmonic content.
Compared with prior art, the present invention is reasonable in design, and structure is simple, without the need to adding peripheral hardware a/d conversion device, by current sensor directly and DSP control chip interconnect; By magnetic balance type Hall element and the low-power consumption of DSP control chip, high operational precision and data-handling capacity real-time, while effectively improving accuracy of detection, the Real-Time Monitoring quality of power supply.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Signal voltage in electrical network is all 220V/380V voltage or higher, utilizes existing electronic installation to measure, is difficult to directly measure, therefore need to utilize current sensor power network signal to be become the low-voltage signal that can survey and be sent in device.Magnetic balance type Hall current sensor is adopted in the present invention.Current parameters is detected, directly power network signal is accessed the primary coil of sensor; And voltage parameter is detected, change voltage signal into current signal by the resistance R that connects and record.
As shown in Figure 1, converter of the present invention comprises interconnective magnetic balance type Hall current sensor and dsp chip 3, described dsp chip 3 comprises the testing circuit, treatment circuit 33 and the suppression signal output apparatus 34 that connect successively, and described magnetic balance type Hall current sensor is connected with electrical network, testing circuit and suppression signal output apparatus 34 respectively.
Described magnetic balance type Hall current sensor comprises two, be respectively the first magnetic balance type Hall current sensor 1 and the second magnetic balance type Hall current sensor 2, the input end of the first described magnetic balance type Hall current sensor 1 is directly connected with electrical network, output terminal is connected with testing circuit, the input end of the second described magnetic balance type Hall current sensor 2 is connected with electrical network by resistance, and output terminal is connected with testing circuit.
Described testing circuit comprises the current detection circuit 31 and voltage detecting circuit 32 that are connected with treatment circuit respectively, described current detection circuit 31 input end is connected with the first magnetic balance type Hall current sensor 1, and described voltage detecting circuit 32 input end is connected with the second magnetic balance type Hall current sensor 2.
Each magnetic balance type Hall current sensor comprises primary coil, secondary coil and Hall element end, described primary coil is connected with electrical network, described testing circuit input end is connected with Hall element end, and the output terminal of described suppression signal output apparatus is connected with secondary coil.
In Fig. 1, the first magnetic balance type Hall current sensor 1 is for current detecting, if its former and deputy limit coil ratio is n
1, the second magnetic balance type Hall current sensor 2 is for voltage detecting, if its former and deputy limit coil ratio is n
2.Hall element in two current sensors is connected with dsp chip 3, detects the induction current size i in Hall element
1, i
2.According to induction current i
1, i
2size, the suppression current signal i that adjustment dsp chip 3 exports
3, i
4, cancelling out each other in the magnetic field produced of the magnetic field allowing secondary coil produce in magnetism gathering rings and primary coil, thus makes i
1, i
2be 0.Therefore can obtain:
Utilize dsp chip realization to the collection of electric signal and data processing, obtain the parameter values such as electric current, voltage, active power, utilize FFT, Hilbert scheduling algorithm calculates each harmonic content, reactive power and power factor simultaneously.And by Software for Design, sequential control and calculating, transmission process are carried out to links.
It is emphasized that the preferred embodiment of the present invention just sets forth the present invention for helping.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this instructions, can make many modifications and variations.This instructions is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technician can utilize the present invention well.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (5)
1. the electricity digitizer based on DSP and magnetic balance type Hall element, this converter is connected on electrical network, it is characterized in that, described converter comprises interconnective magnetic balance type Hall current sensor and dsp chip, described DSP module comprises the testing circuit, treatment circuit and the suppression signal output apparatus that connect successively, and described magnetic balance type Hall current sensor is connected with electrical network, testing circuit and suppression signal output apparatus respectively.
2. a kind of electricity digitizer based on DSP and magnetic balance type Hall element according to claim 1, it is characterized in that, described magnetic balance type Hall current sensor comprises two, be respectively the first magnetic balance type Hall current sensor and the second magnetic balance type Hall current sensor, the input end of the first described magnetic balance type Hall current sensor is directly connected with electrical network, output terminal is connected with testing circuit, the input end of the second described magnetic balance type Hall current sensor is connected with electrical network by resistance, and output terminal is connected with testing circuit.
3. a kind of electricity digitizer based on DSP and magnetic balance type Hall element according to claim 2, it is characterized in that, described testing circuit comprises the current detection circuit and voltage detecting circuit that are connected with treatment circuit respectively, described current detection circuit input end is connected with the first magnetic balance type Hall current sensor, and described voltage detecting circuit input end is connected with the second magnetic balance type Hall current sensor.
4. a kind of electricity digitizer based on DSP and magnetic balance type Hall element according to claim 1, it is characterized in that, each magnetic balance type Hall current sensor comprises primary coil, secondary coil and Hall element end, described primary coil is connected with electrical network, described testing circuit input end is connected with Hall element end, and the output terminal of described suppression signal output apparatus is connected with secondary coil.
5. a kind of electricity digitizer based on DSP and magnetic balance type Hall element according to claim 1, it is characterized in that, described treatment circuit processes the electric signal gathered, comprise and calculate electric current, voltage, power and power factor value, and FFT conversion is carried out to the signal gathered, calculate each harmonic content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510056217.9A CN104678214A (en) | 2015-02-03 | 2015-02-03 | Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type Hall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510056217.9A CN104678214A (en) | 2015-02-03 | 2015-02-03 | Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type Hall sensor |
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| Publication Number | Publication Date |
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| CN104678214A true CN104678214A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510056217.9A Pending CN104678214A (en) | 2015-02-03 | 2015-02-03 | Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type Hall sensor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004069466A (en) * | 2002-08-06 | 2004-03-04 | Kyoritsu Electrical Instruments Works Ltd | Electric current measuring device |
| CN102193021A (en) * | 2010-02-23 | 2011-09-21 | 阿尔卑斯绿色器件株式会社 | Current sensor |
| CN102279305A (en) * | 2011-04-13 | 2011-12-14 | 大连丰和电力科技有限公司 | Closed loop magnetic balance type Hall current sensor |
| CN202256455U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Magnetic balanced type Hall current sensor |
| CN104297564A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type mutual inductor |
| CN104297565A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type Hall sensor |
-
2015
- 2015-02-03 CN CN201510056217.9A patent/CN104678214A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004069466A (en) * | 2002-08-06 | 2004-03-04 | Kyoritsu Electrical Instruments Works Ltd | Electric current measuring device |
| CN102193021A (en) * | 2010-02-23 | 2011-09-21 | 阿尔卑斯绿色器件株式会社 | Current sensor |
| CN102279305A (en) * | 2011-04-13 | 2011-12-14 | 大连丰和电力科技有限公司 | Closed loop magnetic balance type Hall current sensor |
| CN202256455U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Magnetic balanced type Hall current sensor |
| CN104297564A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type mutual inductor |
| CN104297565A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type Hall sensor |
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Application publication date: 20150603 |