CN105759157A - Alternating current-direct current signal detection system and measuring method for alternating current signal effective value - Google Patents
Alternating current-direct current signal detection system and measuring method for alternating current signal effective value Download PDFInfo
- Publication number
- CN105759157A CN105759157A CN201610265420.1A CN201610265420A CN105759157A CN 105759157 A CN105759157 A CN 105759157A CN 201610265420 A CN201610265420 A CN 201610265420A CN 105759157 A CN105759157 A CN 105759157A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- instantaneous
- direct current
- input
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention provides an alternating current-direct current signal detection system comprising a signal rectification circuit, a zero-crossing detection circuit, a signal sampling circuit and a main control chip. The signal rectification circuit converts an input signal (alternating current signal/direct current signal) into an instantaneous signal; the zero-crossing detection circuit detects or captures a zero crossing position of the instantaneous signal; and outputs a first output signal; the signal sampling circuit measures an instantaneous value of the instantaneous signal and outputs a second output signal; and the main control chip controls the signal rectification circuit, the zero-crossing detection circuit, and the signal sampling circuit and calculates a type, a frequency and an effective value of an input signal according to the first output signal and the second output signal. In addition, the invention also provides a measuring method for an alternating current signal effective value.
Description
Technical field
The present invention relates to a kind of blow-up DC detection circuit and the measuring method of a kind of AC signal virtual value.
Background technology
In commercial production and daily life, using blow-up/unidirectional current is that equipment is powered being widely used.In use, it is often necessary to the signal type of monophasic pulses, signal frequency, signal the physical quantity such as virtual value carry out monitor in real time.
But, traditional blow-up/galvanic measuring circuit complicated structure, for instance, generally using at least one operational amplifier chip, some measures chip even with special single-phase electricity so that not only circuit is extremely complex, calculating process is also extremely complex, and relatively costly.
Therefore, how to provide a kind of simple and there is dynamical alternating current-direct current signal detection system and the important issue of circuit actually current industry.
Summary of the invention
It is an object of the invention to provide a kind of alternating current-direct current signal detection system and the measuring method of a kind of AC signal virtual value, there is simple and dynamical effect, for the defect overcoming traditional measurement circuit to exist.Circuit theory is easily understood, very clear, circuit structure is readily apparent from.
To achieve these goals, technical scheme is as follows:
According to embodiments of the invention, the present invention provides a kind of alternating current-direct current signal detection system, including a signal rectifier circuit, inputs signal by one and converts an instantaneous signal to；One zero-crossing detection circuit, detects the one of this instantaneous signal and crosses zero position, and export one first output signal；One signal sample circuit, measures an instantaneous value of this instantaneous signal, and exports one second output signal；And a Master control chip, control this signal rectifier circuit, this zero-crossing detection circuit and this signal sample circuit, wherein, this Master control chip calculates the type of this input signal, frequency and virtual value according to this first output signal and this second output signal.
According to another embodiment of the present invention, the present invention also provides for the measuring method of a kind of AC signal virtual value, comprises the following steps: by a signal rectifier circuit, inputs signal by one and converts an instantaneous signal to；By a zero-crossing detection circuit, detect the one of this instantaneous signal and cross zero position, and export one first output signal；By a signal sample circuit, measure an instantaneous value of this instantaneous signal, and export one second output signal；And by a Master control chip, monitor this first output signal, with differentiate this input signal type for a direct current signal or an AC signal, wherein, if this input signal is this AC signal, this Master control chip is measured a cycle of this AC signal, and detects a peak value of this AC signal, and before this end cycle of this AC signal, calculate the virtual value of this AC signal.
Accompanying drawing explanation
In order to be illustrated more clearly that present configuration feature and technical essential, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Fig. 1 is the block chart of a kind of blow-up DC detection circuit structure of the present invention；
Fig. 2 is the circuit diagram of the signal rectifier circuit of the present invention；
Fig. 3 is the circuit diagram of the zero-crossing detection circuit of the present invention；
Fig. 4 is the circuit diagram of the signal sample circuit of the present invention；
Fig. 5 is the schematic diagram of the original ac input signal of the present invention；
Fig. 6 is the schematic diagram of the signal of the rectified rear output of original AC signal of the present invention；
When Fig. 7 is the exchange input of the present invention, zero point catches the schematic diagram of the output signal of circuit；
When Fig. 8 is the direct current input of the present invention, zero point catches the schematic diagram of the output signal of circuit；And
Fig. 9 is the schematic diagram of the AC signal sampling of the present invention.
Description of reference numerals: signal rectifier circuit 10, zero-crossing detection circuit 12, signal sample circuit 14, Master control chip 16, inputs signal AC/DC_Signal, electric capacity C1, C2, rectifier bridge D1, export signal Output1, output signal Output2, transistor Q1, resistance R1-R8, period t1, t2, T peak value Vpp, instantaneous signal V_signal.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the present embodiment, the technical scheme in embodiment is carried out specifically, describes clearly and completely.
Notice, structure that this specification institute accompanying drawings illustrates, ratio, size etc., all only in order to coordinate the disclosed content of description, understand for the personage being familiar with this skill and read, it is not limited to the qualifications that the present invention can implement, therefore do not have technical essential meaning, the adjustment of the modification of any structure, the change of proportionate relationship or size, under not affecting effect that the present invention can be generated by and the purpose that can reach, disclosed technology contents all should be dropped on and obtain in the scope that can contain.
As shown in Figure 1, the alternating current-direct current signal detection system of the present invention, including signal rectifier circuit 10, zero-crossing detection circuit 12, signal sample circuit 14 and a Master control chip 16, wherein, signal rectifier circuit 10 can input signal (AC signal/direct current signal) AC/DC_Signal by one and convert an instantaneous signal V_signal to, zero-crossing detection circuit 12 can detect or catch the one of instantaneous signal V_signal and cross zero position, and exports signal Output1 output by one；Signal sample circuit 14 can measure an instantaneous value of instantaneous signal V_signal, and export signal Output2, Master control chip 16 can control signal rectifier circuit 10, zero-crossing detection circuit 12 and signal sample circuit 14, additionally, Master control chip 16 calculates the input type of signal, frequency and virtual value according to output signal Output1 and output signal Output2.
As shown in Fig. 1 and 2, original input signal can be AC signal or direct current signal, and through signal rectifier circuit 10, the signal of its output is an instantaneous signal V_signal.Signal rectifier circuit 10 can be the one of which of a half-wave rectifying circuit, a full-wave rectifying circuit, a bridge rectifier and a voltage doubling rectifing circuit.
The type identification of input signal
As it is shown on figure 3, zero-crossing detection circuit 12 is in varying input signal (AC signal or direct current signal) situation, different output signal Output1 can be obtained.Instantaneous signal V_signal after rectification passes through resistance R1, resistance R2 and resistance R3 dividing potential drop, after the signal of 1 foot of transistor Q1 exceedes the threshold voltage (thresholdvoltage) of transistor Q1, and the 3 foot ground connection of transistor Q1, output signal Output1 is logical zero；When, after threshold voltage lower than transistor Q1 of the signal of 1 foot of transistor Q1, output signal Output1 is logic 1, and wherein, electric capacity C1, resistance R1, resistance R2 and resistance R3 collectively form a RC wave filter, mainly filters useless interference signal.
In order to improve signal sample circuit 14 capacity of resisting disturbance, the present invention adopts hardware filtering circuit and software filtering algorithm that input signal is carried out double-smoothing.As shown in Figure 4, electric capacity C2, resistance R6, resistance R7 and resistance R8 collectively form a RC filter circuit, filter high-frequency interferencing signal.In software filtering algorithm process process, the t2 period each sampled value (as shown in Figure 9) can be monitored continuously, under normal circumstances, these continuous print sampled values are regular gradual change numerical value, if the value (more than or less than previous value more than 20%) that a saltus step is very big occurs suddenly, the value of this sudden change can be abandoned by Master control chip 16 as abnormal jamming signal, and proceed sampling and process.Therefore, software/hardware double-smoothing processes and can ensure that the present invention has very strong capacity of resisting disturbance.
According to embodiments of the invention, if input signal is a direct current signal, instantaneous signal V_signal will be a straight direct current signal；If input signal is an AC signal, instantaneous signal V_signal will be signal as shown in Figure 6.
For AC signal, there is zero crossing (ZeroCross in Fig. 5), so, the output situation of the output signal Output1 of zero-crossing detection circuit 12 is as shown in Figure 7.
Furthermore, for direct current signal, owing to being absent from the zero crossing in Fig. 5, so, the output situation of the output signal Output1 of zero-crossing detection circuit 12 is as shown in Figure 8.
Again, Master control chip 16 can monitor the output waveform of the output signal Output1 of zero-crossing detection circuit 12 in real time, and therefore, Master control chip 16 can monitor the type of input signal in real time.
The frequency measurement of signal
For AC signal, as it is shown in fig. 7, the output signal Output1 of zero-crossing detection circuit 12 is a very regular periodic signal.Master control chip 16 includes an external interrupt device (be not depicted in graphic in) and an ADC (be not depicted in graphic in), wherein, external interrupt device has an external interrupt input, and ADC has a conversion inputs.Master control chip 16 is by the pulse signal (as shown in Figure 9) of the output signal Output1 of external interrupt input two continuous print zero-crossing detection circuits 12 of monitoring, and the interval between the rising edge of recording pulse signal, so, the cycle of AC signal can be precisely calculated, then can be obtained the frequency (refer to formula 1) of AC signal by the cycle:
(formula 1)
The effective value measurement of AC signal
For direct current signal, Master control chip 16 starts ADC (analog-to-digitalconverter, ADC) directly reading the output signal Output2 of signal sample circuit 14, the output signal Output2 of signal sample circuit 14 is that instantaneous signal V_signal is via the weak signal after electricity group R1, resistance R7 and resistance R8 dividing potential drop.So, the virtual value of the instantaneous signal V_signal after rectification as shown in Equation 2:
(formula 2)
Wherein, 2^n is n is the figure place of ADC, and V_ref is the reference voltage of ADC, and DATA_ADC is the sampled value of ADC.
For AC signal, all sampled values, for a complete cycle is carried out continuous sampling, are calculated just obtaining the virtual value of input signal by the measuring method of traditional AC signal virtual value.The place that this kind traditional measuring method is not enough is in that the calculating of input signal virtual value have to wait the input signal sampling of a complete cycle just can carry out after completing, and therefore, signal virtual value cannot the situation of reaction current period of real-time synchronization.
But, the present invention adopts one to save time and efficient method, it is possible to calculated the virtual value in this cycle before one end cycle of AC signal.Concrete sampling arranges as shown in Figure 9, only around the peak value Vpp of the output signal Output2 of signal sample circuit 14, it is timed sampling, the starting point of timing sampling is positioned at the t1 point after the rising edge of zero point signal acquisition, continuously performs ADC sampling in the t2 period.The selection of t1 and t2 period is all based on Master control chip 16 and has measured the frequency of AC signal, in order to ensure the high efficiency of the present invention, the selection of t1, t2 period must carry out according to following principle, first, the selection of t1 period can not be too short, but must assure that the sampled point of ADC is before peak values of ac occurs, is typically chosen and ranges between 0.3*T to 0.4*T；Secondly the selection of t2 period can not be oversize, but must assure that and can cover peak values of ac, is typically chosen and ranges between 0.2*T to 0.3*T.
Master control chip 16 adopts software peak-hold algorithm that ADC sampled value is processed in real time in the t2 period, finds out the peak value data of interim AC signal this week.Concrete methods of realizing includes: the sampled value of t2 period is compared by Master control chip 16 continuously, if currency is more than previous value, represent the AC signal ascent stage also in waveform, Master control chip 16 continues sampling and compares front and back sampled value, but once find that currency is less than or equal to previous value, represent that waveform initially enters the decline stage, now recording previous value and terminate sampling, this value is the value Data_max of the ADC corresponding to AC wave shape peak (peak value).Master control chip 16, by this value Data_max is calculated, can draw the virtual value of current period, refer to shown in formula 3:
(formula 3)
Wherein, 2^n is n is the figure place of ADC, and V_ref is the reference voltage of ADC, and the maximum sampled value that DATA_max is ADC in the t2 period.
After the virtual value calculating instantaneous signal V_signal, then calculate the virtual value of input signal, as shown in Equation 4:
(formula 4)
Wherein, V_D1 is the voltage difference of the rectifier bridge D1 of signal rectifier circuit 10.
In summary, the measuring method not only sampling time adopting AC signal virtual value of the present invention shortens, and pending sampling data also greatly reduces compared to complete period sampling, the efficiency far that AC signal virtual value calculates is higher than traditional measuring method, and virtual value can the situation of reaction current period of real-time synchronization.
Above-mentioned detailed description of the invention; it is only technology design and architectural feature that the present invention is described; purpose is in that the stakeholder being familiar with technique can be implemented according to this; but above said content is not limiting as protection scope of the present invention; every any equivalence made according to the spirit of the present invention changes or modifies, and all should fall within protection scope of the present invention.
Claims (10)
1. an alternating current-direct current signal detection system, including:
One signal rectifier circuit, inputs signal by one and converts an instantaneous signal to；
One zero-crossing detection circuit, detects the one of this instantaneous signal and crosses zero position, and export one first output signal；
One signal sample circuit, measures an instantaneous value of this instantaneous signal, and exports one second output signal；And
One Master control chip, controls this signal rectifier circuit, this zero-crossing detection circuit and this signal sample circuit,
Wherein, this Master control chip calculates the type of this input signal, frequency and virtual value according to this first output signal and this second output signal.
2. alternating current-direct current signal detection system according to claim 1, it is characterised in that this Master control chip more includes an external interrupt device, has a first input end；One ADC, has one second input；And a comparing unit, ratio more continuous sampled value, when this sampled value of continuous print reduces, then terminate sampling.
3. alternating current-direct current signal detection system according to claim 1, it is characterised in that this first output signal input is to this first input end of this external interrupt device, and this second output signal inputs this second input to this ADC.
4. alternating current-direct current signal detection system according to claim 1, it is characterised in that this signal rectifier circuit is the one of which of a half-wave rectifying circuit, a full-wave rectifying circuit, a bridge rectifier and a voltage doubling rectifing circuit.
5. alternating current-direct current signal detection system according to claim 1, it is characterised in that this zero-crossing detection circuit is made up of RC wave filter and transistor switch, and this signal sample circuit is made up of RC wave filter.
6. alternating current-direct current signal detection system according to claim 1, it is characterised in that the type of this input signal is an AC signal or direct current signal.
7. a measuring method for AC signal virtual value, including:
By a signal rectifier circuit, input signal by one and convert an instantaneous signal to；
By a zero-crossing detection circuit, detect the one of this instantaneous signal and cross zero position, and export one first output signal；
By a signal sample circuit, measure an instantaneous value of this instantaneous signal, and export one second output signal；And
By a Master control chip, monitor this first output signal, with differentiate this input signal type for a direct current signal or an AC signal, wherein, if this input signal is this AC signal, then this Master control chip is measured a cycle of this AC signal, and detects a peak value of this AC signal, and before this end cycle of this AC signal, calculate the virtual value of this AC signal.
8. the measuring method of AC signal virtual value according to claim 7, it is characterized in that, this Master control chip includes an ADC, if this input signal is this direct current signal, this ADC measures this second output signal, line algorithm of going forward side by side processes, it is thus achieved that a corresponding DC voltage value.
9. the measuring method of AC signal virtual value according to claim 7, it is characterized in that, this Master control chip includes an ADC, if this input signal is this AC signal, this ADC measures this second output signal, line algorithm of going forward side by side processes, it is thus achieved that a corresponding ac voltage.
10. the measuring method of AC signal virtual value according to claim 7, it is characterized in that, be additionally included in this signal sample circuit this second output signal this peak value around be timed sampling, and utilize software peak-hold algorithm that the complex sampling values of this ADC is processed in real time, and then calculate this peak value of this AC signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610265420.1A CN105759157A (en) | 2016-05-13 | 2016-05-13 | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610265420.1A CN105759157A (en) | 2016-05-13 | 2016-05-13 | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105759157A true CN105759157A (en) | 2016-07-13 |
Family
ID=56325856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610265420.1A Pending CN105759157A (en) | 2016-05-13 | 2016-05-13 | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105759157A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253789A (en) * | 2016-10-27 | 2016-12-21 | 深圳市复兴伟业技术有限公司 | The zero passage method of sampling of single phase induction motor inverse electromotive force |
| CN106569447A (en) * | 2016-11-14 | 2017-04-19 | 江苏林洋能源股份有限公司 | Electric energy meter having AC/DC adaptive electric energy measurement function and electric energy measurement method |
| CN108008173A (en) * | 2016-10-28 | 2018-05-08 | 致茂电子股份有限公司 | Alternating current-direct current is superimposed test device |
| CN108037348A (en) * | 2017-11-27 | 2018-05-15 | 深圳市锐钜科技有限公司 | Single-phase alternating current zero passage detection method |
| CN108957122A (en) * | 2017-05-17 | 2018-12-07 | 佛山市顺德区美的电热电器制造有限公司 | A kind of frequency determination methods and device of voltage |
| CN109752592A (en) * | 2019-02-22 | 2019-05-14 | 南京信息职业技术学院 | AC/DC signal power integrated measuring device and method |
| WO2020118913A1 (en) * | 2018-12-14 | 2020-06-18 | 青岛海尔空调器有限总公司 | Voltage peak value determining apparatus, power-cutting apparatus and method |
| CN111537784A (en) * | 2020-05-12 | 2020-08-14 | 国网河南省电力公司电力科学研究院 | Current measuring tool, electric energy measuring system and electric energy measuring method |
| CN113820533A (en) * | 2021-09-22 | 2021-12-21 | 营口天成消防设备有限公司 | Method for measuring effective value of alternating current signal |
| CN113826017A (en) * | 2019-03-25 | 2021-12-21 | 伊顿智能动力有限公司 | Circuit arrangement and method for monitoring a signal in the form of an alternating voltage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093416A (en) * | 2002-08-30 | 2004-03-25 | Hironobu Nakano | Voltage / current measuring instrument |
| CN103235536A (en) * | 2013-04-12 | 2013-08-07 | 青岛海尔空调电子有限公司 | Alternating-direct current self-adaptation device and alternating-direct current self-adaptation method |
| CN203490280U (en) * | 2013-02-04 | 2014-03-19 | 重庆汇韬电气有限公司 | Electric signal measuring circuit |
| 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 |
| CN104360146A (en) * | 2014-11-17 | 2015-02-18 | 深圳市英威腾电气股份有限公司 | Bipolar analog quantity inputting and detecting circuit |
| CN104569851A (en) * | 2013-10-23 | 2015-04-29 | 中兴通讯股份有限公司 | Power supply detecting device and method |
| CN205691680U (en) * | 2016-05-13 | 2016-11-16 | 魏德米勒电联接（上海）有限公司 | Alternating current-direct current signal detection system |
-
2016
- 2016-05-13 CN CN201610265420.1A patent/CN105759157A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093416A (en) * | 2002-08-30 | 2004-03-25 | Hironobu Nakano | Voltage / current measuring instrument |
| CN203490280U (en) * | 2013-02-04 | 2014-03-19 | 重庆汇韬电气有限公司 | Electric signal measuring circuit |
| CN103235536A (en) * | 2013-04-12 | 2013-08-07 | 青岛海尔空调电子有限公司 | Alternating-direct current self-adaptation device and alternating-direct current self-adaptation method |
| CN104569851A (en) * | 2013-10-23 | 2015-04-29 | 中兴通讯股份有限公司 | Power supply detecting device and method |
| 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 |
| CN104360146A (en) * | 2014-11-17 | 2015-02-18 | 深圳市英威腾电气股份有限公司 | Bipolar analog quantity inputting and detecting circuit |
| CN205691680U (en) * | 2016-05-13 | 2016-11-16 | 魏德米勒电联接（上海）有限公司 | Alternating current-direct current signal detection system |
Non-Patent Citations (2)
| Title |
|---|
| 吕砚山等: "《气液两相流特征参数的电子测量》", 30 September 1992, 山东科学技术出版社 * |
| 黄新波: "《输电线路在线监测与故障诊断 第2版》", 31 October 2014, 中国电力出版社 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253789B (en) * | 2016-10-27 | 2018-10-19 | 深圳市复兴伟业技术有限公司 | The zero passage method of sampling of single phase induction motor inverse electromotive force |
| CN106253789A (en) * | 2016-10-27 | 2016-12-21 | 深圳市复兴伟业技术有限公司 | The zero passage method of sampling of single phase induction motor inverse electromotive force |
| CN108008173A (en) * | 2016-10-28 | 2018-05-08 | 致茂电子股份有限公司 | Alternating current-direct current is superimposed test device |
| CN108008173B (en) * | 2016-10-28 | 2020-02-18 | 致茂电子股份有限公司 | Alternating current-direct current superposition testing device |
| CN106569447A (en) * | 2016-11-14 | 2017-04-19 | 江苏林洋能源股份有限公司 | Electric energy meter having AC/DC adaptive electric energy measurement function and electric energy measurement method |
| CN108957122A (en) * | 2017-05-17 | 2018-12-07 | 佛山市顺德区美的电热电器制造有限公司 | A kind of frequency determination methods and device of voltage |
| CN108037348B (en) * | 2017-11-27 | 2020-04-14 | 深圳市锐钜科技有限公司 | Single-phase alternating current zero-crossing detection method |
| CN108037348A (en) * | 2017-11-27 | 2018-05-15 | 深圳市锐钜科技有限公司 | Single-phase alternating current zero passage detection method |
| WO2020118913A1 (en) * | 2018-12-14 | 2020-06-18 | 青岛海尔空调器有限总公司 | Voltage peak value determining apparatus, power-cutting apparatus and method |
| CN109752592A (en) * | 2019-02-22 | 2019-05-14 | 南京信息职业技术学院 | AC/DC signal power integrated measuring device and method |
| CN113826017A (en) * | 2019-03-25 | 2021-12-21 | 伊顿智能动力有限公司 | Circuit arrangement and method for monitoring a signal in the form of an alternating voltage |
| CN113826017B (en) * | 2019-03-25 | 2024-05-24 | 伊顿智能动力有限公司 | Circuit configuration and method for monitoring a signal in the form of an alternating voltage |
| CN111537784A (en) * | 2020-05-12 | 2020-08-14 | 国网河南省电力公司电力科学研究院 | Current measuring tool, electric energy measuring system and electric energy measuring method |
| CN113820533A (en) * | 2021-09-22 | 2021-12-21 | 营口天成消防设备有限公司 | Method for measuring effective value of alternating current signal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105759157A (en) | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value | |
| CN205691680U (en) | Alternating current-direct current signal detection system | |
| CN103743944B (en) | A kind of real effective combined-voltage measuring method of automatic identification signal type | |
| CN106908671A (en) | A kind of non-intrusion type household loads intelligent detecting method and system | |
| CN103217572B (en) | Alternating current voltage and zero-crossing examination device and method thereof | |
| CN108768183B (en) | Broadband induction heating power based on resonance frequency tracking | |
| CN107677873B (en) | A kind of transmission line of electricity current detection means | |
| CN101666846A (en) | System and method for detecting anomaly of secondary wiring of current mutual inductor | |
| CN104614608A (en) | Detection device and method for low voltage parallel electric arc fault | |
| CN103412200A (en) | Three-phase alternating current phase sequence detection method and device | |
| CN109001577A (en) | A kind of electrical energy measurement live data analysis method and system | |
| CN104300494A (en) | A-type leakage protector allowing leakage tripping current values to stay same | |
| CN104267273A (en) | Quick detection circuit and method for mains fluctuation | |
| CN105699738A (en) | PWM-based AC signal effective value measurement method | |
| CN101713799B (en) | Method for distinguishing three-phase alternating current phase sequences | |
| CN104811028B (en) | Circuit of power factor correction | |
| CN110879325A (en) | Voltage sag online detection system based on advance prediction | |
| CN102288814B (en) | Real-time detection method for voltage dip | |
| CN109061260B (en) | Method for preventing electricity stealing by strong magnetism | |
| CN112986681A (en) | Low-voltage power signal phase difference measuring device | |
| CN110879326A (en) | Online detection system for positioning voltage sag disturbance point based on residual error curve | |
| CN115656864B (en) | Radio frequency power supply signal acquisition circuit and semiconductor process equipment | |
| CN214591177U (en) | Alternating information detection circuit, power control circuit and water dispenser | |
| CN102928706A (en) | Alternating current acquisition device and data acquisition method thereof | |
| CN109655676A (en) | A kind of method of electric power nuclear phase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |
|
| WD01 | Invention patent application deemed withdrawn after publication |