CN106199144A - Super low-power consumption AC sine wave signal real-time sampling method - Google Patents
Super low-power consumption AC sine wave signal real-time sampling method Download PDFInfo
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- CN106199144A CN106199144A CN201610511153.1A CN201610511153A CN106199144A CN 106199144 A CN106199144 A CN 106199144A CN 201610511153 A CN201610511153 A CN 201610511153A CN 106199144 A CN106199144 A CN 106199144A
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- sine wave
- power consumption
- wave signal
- super low
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/02—Measuring effective values, i.e. root-mean-square values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to super low-power consumption AC sine wave signal real-time sampling method, super low-power consumption AC sine wave signal real-time sampling method, be made up of with difference ADC sample circuit zero cross detection circuit, described zero cross detection circuit includes comparator.Owing to, in a sine wave period, ADC only need to gather two secondary data, so most time allows to close adc circuit, so that the present invention has the real-time sampling effect of the sine wave signal of super low-power consumption.
Description
Technical field
The present invention relates to vacuum circuit breaker equipment technical field, specifically super low-power consumption AC sine wave signal real-time
The method of sampling.
Background technology
In actual use, virtual value is the parameter being most widely used, and the reading of voltmeter is in addition to special circumstances, almost
It is all to carry out degree of determining by sinusoidal wave virtual value.It is as follows that virtual value obtains wide variety of reason: (1) is due to its direct reaction
Going out AC signal energy size, this is the heaviest for aspects such as research power, noise, the distortion factor, the purity of frequency spectrum, energy conversions
Want.(2) it has foolproof sumproperties, calculates extremely convenient.
Existing AC sine wave signal real-time sampling to be realized mainly has Differential Input multi-point sampling and accurate all wave rectification
Two kinds of measuring methods, both of which needs by ADC, signal is carried out multi-point sampling.
Two kinds of detection modes all can calculate peak value and the virtual value of AC sine wave signal easily, but low
In the sampling application of power consumption AC signal, owing to frequently opening ADC, it is difficult to accomplish lower power consumption.
Summary of the invention
For solving the problems referred to above, the present invention provides a kind of super low-power consumption AC sine wave signal real-time sampling method.
Super low-power consumption AC sine wave signal real-time sampling method, by zero cross detection circuit and difference ADC sample circuit structure
Becoming, described zero cross detection circuit includes that comparator, described difference ADC sample circuit include ADC, the MCU being connected with ADC and defeated
Go out with reference to REF.
The negative pole of described comparator connects with the negative pole of ADC, and the positive pole of comparator connects with the positive pole of ADC；Comparator
Outfan is connected with the initiator end of MCU.
The invention has the beneficial effects as follows:
In the present invention, owing to, in a sine wave period, ADC only need to gather two secondary data, so most time
Allow to close adc circuit, it is achieved that the real-time sampling of the sine wave signal of super low-power consumption.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is Differential Input multi-point sampling figure；
Fig. 2 is accurate all wave rectification figure；
Fig. 3 is the zero cross detection circuit detection process analysis figure of the present invention；
Fig. 4 is peakvalue's checking and the ADC reading numerical values corresponding relation of the AC signal sine wave of the present invention；
Fig. 5 is the annexation schematic diagram of the present invention.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below right
The present invention is expanded on further.
As shown in Figures 1 to 5, super low-power consumption AC sine wave signal real-time sampling method, by zero cross detection circuit and difference
Dividing ADC sample circuit to constitute, described zero cross detection circuit includes that comparator, described difference ADC sample circuit include ADC and ADC
The MCU being connected and output are with reference to REF.
In zero cross detection circuit, when AC signal passes through, when waveform is from just half circumference negative half period conversion, through zero-bit
Time, system is made detection, can be obtained the signal waveform such as Fig. 3 from testing result.Touched by zero cross detection circuit output signal
Send out the interruption of single-chip microcomputer, calculate the time between rising edge and falling edge, thus calculate the AC signal cycle.
Calculate sinusoidal wave 90 ° of sampling times with 270 ° by the signal period, sample with 270 ° of times at 90 °,
The peak-data of AC signal positive half-wave and negative half-wave can be measured, calculate public affairs by sinusoidal wave peak value with virtual value relation
Formula:
In formula (1): E be virtual value, Em be peak value；
The virtual value of sine wave, its peakvalue's checking and ADC reading numerical values position relationship can be calculated as shown in Figure 4:
Owing to, in a sine wave period, ADC only need to gather two secondary data, so most time allows to close
Adc circuit, it is achieved that the real-time sampling of the sine wave signal of super low-power consumption.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
The personnel simply present invention it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description
Principle, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these change and
Improvement both falls within claimed invention.Claimed scope is by appending claims and equivalent circle thereof
Fixed.
Claims (2)
1. super low-power consumption AC sine wave signal real-time sampling method, it is characterised in that: super low-power consumption AC sine wave signal is real
Time the method for sampling, be made up of with difference ADC sample circuit zero cross detection circuit, described zero cross detection circuit includes comparator.
Super low-power consumption AC sine wave signal real-time sampling method the most according to claim 1, it is characterised in that: described difference
ADC sample circuit is divided to include ADC and the MCU being connected with ADC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511153.1A CN106199144A (en) | 2016-07-02 | 2016-07-02 | Super low-power consumption AC sine wave signal real-time sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511153.1A CN106199144A (en) | 2016-07-02 | 2016-07-02 | Super low-power consumption AC sine wave signal real-time sampling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106199144A true CN106199144A (en) | 2016-12-07 |
Family
ID=57463244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610511153.1A Pending CN106199144A (en) | 2016-07-02 | 2016-07-02 | Super low-power consumption AC sine wave signal real-time sampling method |
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| CN (1) | CN106199144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456138A (en) * | 2019-08-12 | 2019-11-15 | 宁波拓邦智能控制有限公司 | A kind of electric current detecting method, device and housed device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338151A (en) * | 1999-01-20 | 2002-02-27 | 艾利森电话股份有限公司 | A low evergy ADC |
| CN102707193A (en) * | 2012-04-28 | 2012-10-03 | 深圳市科陆电子科技股份有限公司 | Ultra-low-power implementing method for fault indicator |
| CN103743944A (en) * | 2014-01-16 | 2014-04-23 | 贵州省计量测试院 | Alternating current and direct current voltage true virtual value measurement method capable of automatically identifying type of signal |
| CN204241558U (en) * | 2014-12-01 | 2015-04-01 | 上海华宿电气股份有限公司 | A kind of voltage signal cycles harvester |
-
2016
- 2016-07-02 CN CN201610511153.1A patent/CN106199144A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338151A (en) * | 1999-01-20 | 2002-02-27 | 艾利森电话股份有限公司 | A low evergy ADC |
| CN102707193A (en) * | 2012-04-28 | 2012-10-03 | 深圳市科陆电子科技股份有限公司 | Ultra-low-power implementing method for fault indicator |
| CN103743944A (en) * | 2014-01-16 | 2014-04-23 | 贵州省计量测试院 | Alternating current and direct current voltage true virtual value measurement method capable of automatically identifying type of signal |
| CN204241558U (en) * | 2014-12-01 | 2015-04-01 | 上海华宿电气股份有限公司 | A kind of voltage signal cycles harvester |
Non-Patent Citations (3)
| Title |
|---|
| 涂水林 等: "多通道多输入范围12位ADC MAX197及其应用", 《电测与仪表》 * |
| 皮特·巴锡: "《电路原理》", 31 January 2016, 机械工业出版社 * |
| 黄天戍 等: "电力设备中类正弦波信号测量方法研究", 《电力自动化设备》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456138A (en) * | 2019-08-12 | 2019-11-15 | 宁波拓邦智能控制有限公司 | A kind of electric current detecting method, device and housed device |
| CN110456138B (en) * | 2019-08-12 | 2022-01-14 | 宁波拓邦智能控制有限公司 | Current detection method and device and household equipment |
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Application publication date: 20161207 |