CN205691680U - Alternating current-direct current signal detection system - Google Patents
Alternating current-direct current signal detection system Download PDFInfo
- Publication number
- CN205691680U CN205691680U CN201620361110.5U CN201620361110U CN205691680U CN 205691680 U CN205691680 U CN 205691680U CN 201620361110 U CN201620361110 U CN 201620361110U CN 205691680 U CN205691680 U CN 205691680U
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- direct current
- input
- output
- 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.)
- Expired - Fee Related
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
This utility model provides a kind of alternating current-direct current signal detection system, including a signal rectifier circuit, a zero-crossing detection circuit, a signal sample circuit and a Master control chip, wherein, one input signal (AC signal/direct current signal) is converted into an instantaneous signal by signal rectifier circuit, zero-crossing detection circuit detects or catches the one of instantaneous signal and crosses zero position, and by one first output signal output；Signal sample circuit measures an instantaneous value of instantaneous signal, and export one second output signal, Master control chip control signal rectification circuit, zero-crossing detection circuit and signal sample circuit, Master control chip calculates the type of input signal, frequency and virtual value according to the first output signal and the second output signal.
Description
Technical field
This utility model relates to a kind of blow-up DC detection circuit, belongs to detecting system field.
Background technology
In commercial production and daily life, using blow-up/unidirectional current is that equipment is powered being widely used.?
During use, it is often necessary to the signal type of monophasic pulses, signal frequency, the physical quantity such as virtual value of signal are carried out in real time
Monitoring.
But, traditional blow-up/galvanic measuring circuit complicated structure, such as, at least one typically can be used
Operational amplifier chip, some measures chip even with special single-phase electricity so that not only circuit is extremely complex, calculates process
The most 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 circuit actually current industry
The important issue on boundary.
Utility model content
The purpose of this utility model is to provide a kind of alternating current-direct current signal detection system, has simple and dynamical merit
Effect, for the defect overcoming traditional measurement circuit to exist.Circuit theory is easily understood, very clear, circuit structure understands.
To achieve these goals, the technical solution of the utility model is as follows:
According to embodiment of the present utility model, this utility model provides a kind of alternating current-direct current signal detection system, including a letter
Number rectification circuit, is converted into an instantaneous signal by an input signal；One zero-crossing detection circuit, detects a mistake of this instantaneous signal
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 sampling
Circuit, wherein, this Master control chip calculates the class of this input signal according to this first output signal and this second output signal
Type, frequency and virtual value.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model architectural feature and technical essential, below in conjunction with the accompanying drawings and specific embodiment party
This utility model is described in detail by formula.
Fig. 1 is the block chart of a kind of blow-up DC detection circuit structure of this utility model；
Fig. 2 is the circuit diagram of the signal rectifier circuit of this utility model；
Fig. 3 is the circuit diagram of the zero-crossing detection circuit of this utility model；
Fig. 4 is the circuit diagram of the signal sample circuit of this utility model；
Fig. 5 is the schematic diagram of the original ac input signal of this utility model；
Fig. 6 is the schematic diagram of the signal of the rectified rear output of original AC signal of this utility model；
When Fig. 7 is the exchange input of this utility model, zero point catches the schematic diagram of the output signal of circuit；
When Fig. 8 is the direct current input of this utility model, 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 this utility model.
Description of reference numerals: signal rectifier circuit 10, zero-crossing detection circuit 12, signal sample circuit 14, master control coremaking
Sheet 16, input signal AC/DC_Signal, electric capacity C1, C2, rectifier bridge D1, output signal Output 1, output signal Output
2, 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, clearly and completely retouches
State.
It should be clear that this specification institute accompanying drawings illustrate structure, ratio, size etc., the most only in order to coordinate disclosed in description
Content, for be familiar with this skill personage understand with read, be not limited to the qualifications that this utility model can be implemented,
Therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, do not affecting this reality
With under novel effect that can be generated by and the purpose that can reach, all should fall and obtain energy at the technology contents disclosed in this utility model
In the range of containing.
As it is shown in figure 1, alternating current-direct current signal detection system of the present utility model, including signal rectifier circuit 10, zero passage
Point testing circuit 12, signal sample circuit 14 and a Master control chip 16, wherein, signal rectifier circuit 10 can be by an input letter
Number (AC signal/direct current signal) AC/DC_Signal is converted into an instantaneous signal V_signal, and zero-crossing detection circuit 12 can
One detecting or catching instantaneous signal V_signal crosses zero position, and output signal Output 1 is exported；Signal sampling electricity
An instantaneous value of instantaneous signal V_signal can be measured in road 14, and exports output signal Output 2, and Master control chip 16 can
Control signal rectification circuit 10, zero-crossing detection circuit 12 and signal sample circuit 14, additionally, Master control chip 16 is according to output
Signal Output 1 and output signal Output 2 calculate the type of input signal, frequency and virtual value.
As shown in Fig. 1 and 2, original input signal can be AC signal or direct current signal, through signal rectifier circuit 10,
The signal of its output is an instantaneous signal V_signal.Signal rectifier circuit 10 can be a half-wave rectifying circuit, an all wave rectification
Circuit, a bridge rectifier and the one of which of 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 the case of varying input signal (AC signal or direct current signal), can
Obtain different output signal Output 1.Instantaneous signal V_signal after rectification passes through resistance R1, resistance R2 and resistance
R3 dividing potential drop is after the signal of 1 foot of transistor Q1 exceedes the threshold voltage (threshold voltage) of transistor Q1 and brilliant
The 3 foot ground connection of body pipe Q1, output signal Output 1 is logical zero；When the signal of 1 foot of transistor Q1 is less than the threshold of transistor Q1
After threshold voltage, output signal Output 1 is logic 1, and wherein, electric capacity C1, resistance R1, resistance R2 and resistance R3 collectively form one
RC wave filter, mainly filters useless interference signal.
In order to improve signal sample circuit 14 capacity of resisting disturbance, this utility model uses hardware filtering circuit and software filtering
Algorithm carries out double-smoothing to input signal.As shown in Figure 4, electric capacity C2, resistance R6, resistance R7 and resistance R8 collectively form a RC
Filter circuit, filters high-frequency interferencing signal.During software filtering algorithm process, t2 period each sampled value can be monitored continuously
(as shown in Figure 9), under normal circumstances, these continuous print sampled values are regular gradual change numerical value, if there is suddenly a jumping
Becoming the biggest value (more than or less than previous value more than 20%), the value that this can be suddenlyd change by Master control chip 16 is as abnormal dry
Disturb signal and abandon, and proceed sampling and process.Therefore, software/hardware double-smoothing processes and can ensure that this utility model
Have the strongest capacity of resisting disturbance.
According to embodiment of the present utility model, if input signal is a direct current signal, instantaneous signal V_signal will be one
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 (the Zero Cross as in Fig. 5), so, zero-crossing detection circuit 12
The output situation of output signal Output 1 is as shown in Figure 7.
Furthermore, for direct current signal, owing to not depositing zero crossing in Figure 5, so, the output of zero-crossing detection circuit 12
The output situation of signal Output 1 is as shown in Figure 8.
Also, Master control chip 16 can monitor the output wave of output signal Output 1 of zero-crossing detection circuit 12 in real time
Shape, therefore, Master control chip 16 can monitor the type of input signal in real time.
The frequency measurement of signal
For AC signal, have very much as it is shown in fig. 7, output signal Output 1 of zero-crossing detection circuit 12 is one
The periodic signal of rule.Master control chip 16 includes an external interrupt device (be not depicted in graphic in) and analog/digital conversion
Device (be not depicted in graphic in), wherein, external interrupt device has an external interrupt input, and ADC tool
There is a conversion inputs.Master control chip 16 is by external interrupt input two continuous print zero-crossing detection circuits 12 of monitoring
The pulse signal (as shown in Figure 9) of output signal Output 1, and the time interval between the rising edge of recording pulse signal, institute
With, the cycle of AC signal can be precisely calculated, the frequency that then can be obtained AC signal by the cycle (refer to formula
1):
(formula 1)
The effective value measurement of AC signal
For direct current signal, Master control chip 16 starts ADC (analog-to-digital
Converter, ADC) directly read output signal Output 2 of signal sample circuit 14, the output of signal sample circuit 14
Signal Output 2 is that instantaneous signal V_signal is via the weak signal after electricity group R1, resistance R7 and resistance R8 dividing potential drop.So, whole
The virtual value of the instantaneous signal V_signal after stream is as shown in Equation 2:
(formula 2)
Wherein, 2^n be n be the figure place of ADC, V_ref is the reference voltage of ADC,
DATA_ADC is the sampled value of ADC.
For AC signal, the measuring method of traditional AC signal virtual value is for adopt continuously a complete cycle
All sampled values are calculated the virtual value that just can obtain input signal by sample.The place that this kind of traditional measuring method is not enough
It is that the calculating of input signal virtual value just can be carried out after the input signal of a complete cycle have to be waited to have sampled, because of
This, signal virtual value cannot real-time synchronization reaction current period situation.
But, this utility model uses one to save time and efficient method, can one end cycle of AC signal it
Before calculate the virtual value in this cycle.Concrete sampling arranges as it is shown in figure 9, only in the output signal of signal sample circuit 14
The surrounding of the peak value Vpp of Output 2 is timed sampling, and the starting point of timing sampling is positioned at the rising edge of zero point signal acquisition
T1 point afterwards, is carried out continuously ADC sampling in the t2 period.The selection of t1 and t2 period is all based on master control
Coremaking sheet 16 has measured the frequency of AC signal, in order to ensure high efficiency of the present utility model, and the selection palpus of t1, t2 period
Carrying out according to following principle, first, the selection of t1 period can not be the shortest, but must assure that the sampled point of ADC exists
Before peak values of ac occurs, the scope of being typically chosen is between 0.3*T to 0.4*T；Secondly the selection of t2 period can not be oversize, but must
Must guarantee to cover peak values of ac, the scope of being typically chosen is between 0.2*T to 0.3*T.
Master control chip 16 uses software peak-hold algorithm to carry out ADC sampled value in the t2 period
Process in real time, find out the peak value data of interim AC signal this week.Concrete methods of realizing includes: Master control chip 16 is to the t2 period
Sampled value compare continuously, if currency is more than previous value, represent the AC signal ascent stage also in waveform, main
Control chip 16 continues sampling and compares before and after's sampled value, but once finds that currency, less than or equal to previous value, represents
Waveform initially enters the decline stage, now can record previous value and terminate sampling, and this value is AC wave shape peak (peak
Value) corresponding to value Data_max of ADC.Master control chip 16 by this value Data_max is calculated,
The virtual value of current period can be drawn, refer to shown in formula 3:
(formula 3)
Wherein, 2^n be n be the figure place of ADC, V_ref is the reference voltage of ADC, with
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, such as formula 4 institute
Show:
(formula 4)
Wherein, V_D1 is the voltage difference of rectifier bridge D1 of signal rectifier circuit 10.
In summary, uses the measuring method not only sampling time of this utility model AC signal virtual value to shorten, and
Pending sampling data also greatly reduces compared to complete period sampling, and the efficiency far that AC signal virtual value calculates is higher than tradition
Measuring method, and virtual value can with real-time synchronization reaction current period situation.
Above-mentioned detailed description of the invention, only illustrates technology of the present utility model design and architectural feature, it is therefore intended that allow ripe
The stakeholder knowing technique can implement according to this, but above said content is not limiting as protection domain of the present utility model,
Every any equivalence change made according to spirit of the present utility model or modification, all should fall into protection of the present utility model
Within the scope of.
Claims (6)
1. an alternating current-direct current signal detection system, including:
One signal rectifier circuit, is converted into an instantaneous signal by an input signal；
One zero-crossing detection circuit, detect this instantaneous signal one crosses zero position, and exports 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 class of this input signal according to this first output signal and this second output signal
Type, frequency and virtual value.
Alternating current-direct current signal detection system the most according to claim 1, it is characterised in that this Master control chip further includes outside one
Device is interrupted in portion, 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 terminates sampling.
Alternating current-direct current signal detection system the most according to claim 2, it is characterised in that the input of this first output signal is to being somebody's turn to do
This first input end of external interrupt device, and the input of this second output signal is second defeated to this of this ADC
Enter end.
Alternating current-direct current signal detection system the most according to claim 1, it is characterised in that this signal rectifier circuit is a half-wave
Rectification circuit, a full-wave rectifying circuit, a bridge rectifier and the one of which of a voltage doubling rectifing circuit.
Alternating current-direct current signal detection system the most according to claim 1, it is characterised in that this zero-crossing detection circuit is by RC
Wave filter and transistor switch form, and this signal sample circuit is made up of RC wave filter.
Alternating current-direct current signal detection system the most according to claim 1, it is characterised in that the type of this input signal is one
AC signal or direct current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620361110.5U CN205691680U (en) | 2016-05-13 | 2016-05-13 | Alternating current-direct current signal detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620361110.5U CN205691680U (en) | 2016-05-13 | 2016-05-13 | Alternating current-direct current signal detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205691680U true CN205691680U (en) | 2016-11-16 |
Family
ID=57264139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620361110.5U Expired - Fee Related CN205691680U (en) | 2016-05-13 | 2016-05-13 | Alternating current-direct current signal detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205691680U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759157A (en) * | 2016-05-13 | 2016-07-13 | 魏德米勒电联接（上海）有限公司 | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value |
| CN106772123A (en) * | 2017-01-06 | 2017-05-31 | 常熟开关制造有限公司(原常熟开关厂） | Power supply type recognition methods, circuit and automatic change-over |
| 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 |
| CN111896807A (en) * | 2020-08-05 | 2020-11-06 | 威胜集团有限公司 | Fundamental wave frequency measuring method, measuring terminal and storage medium |
| CN116614916A (en) * | 2023-07-21 | 2023-08-18 | 深圳莱福德科技股份有限公司 | Intelligent lighting driving multi-signal detection circuit and device |
-
2016
- 2016-05-13 CN CN201620361110.5U patent/CN205691680U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759157A (en) * | 2016-05-13 | 2016-07-13 | 魏德米勒电联接（上海）有限公司 | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value |
| CN106772123A (en) * | 2017-01-06 | 2017-05-31 | 常熟开关制造有限公司(原常熟开关厂） | Power supply type recognition methods, circuit and automatic change-over |
| 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 |
| CN111896807A (en) * | 2020-08-05 | 2020-11-06 | 威胜集团有限公司 | Fundamental wave frequency measuring method, measuring terminal and storage medium |
| CN111896807B (en) * | 2020-08-05 | 2023-03-14 | 威胜集团有限公司 | Fundamental wave frequency measuring method, measuring terminal and storage medium |
| CN116614916A (en) * | 2023-07-21 | 2023-08-18 | 深圳莱福德科技股份有限公司 | Intelligent lighting driving multi-signal detection circuit and device |
| CN116614916B (en) * | 2023-07-21 | 2023-11-03 | 深圳莱福德科技股份有限公司 | Intelligent lighting driving multi-signal detection circuit and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205691680U (en) | Alternating current-direct current signal detection system | |
| CN105759157A (en) | Alternating current-direct current signal detection system and measuring method for alternating current signal effective value | |
| CN104808050B (en) | A kind of voltage-limiting surge protector current in resistance property on-line monitoring method and device | |
| CN106908671A (en) | A kind of non-intrusion type household loads intelligent detecting method and system | |
| CN108768183B (en) | Broadband induction heating power based on resonance frequency tracking | |
| CN107677873B (en) | A kind of transmission line of electricity current detection means | |
| CN106066437B (en) | A kind of on-line monitoring device of metallic oxide arrester and its monitoring method | |
| CN207457337U (en) | Induction heating power electric current timely collection circuit | |
| CN101666846A (en) | System and method for detecting anomaly of secondary wiring of current mutual inductor | |
| CN106443307A (en) | Online insulation monitoring system for power transformation equipment | |
| CN201233423Y (en) | Electric network voltage detection device | |
| CN109001577A (en) | A kind of electrical energy measurement live data analysis method and system | |
| CN201229381Y (en) | Anomalous frequency test system for ground resistance of grounded screen | |
| CN104267273A (en) | Quick detection circuit and method for mains fluctuation | |
| CN103323663B (en) | The measuring method of a kind of Rectification Power Factor DC current and rectifier loss | |
| CN108152552A (en) | A kind of electricity anti-theft method for precisely capture Dimmer interference | |
| CN108241129A (en) | Switching power supply output filter capacitor monitoring device and method | |
| CN109061260B (en) | Method for preventing electricity stealing by strong magnetism | |
| 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 | |
| CN205787992U (en) | Constant-current source control system | |
| CN107817463A (en) | A kind of electricity anti-theft method for detecting short circuit electric energy meter | |
| CN109030897A (en) | Stealing detection method based on Fourier transformation | |
| CN104407208B (en) | A kind of system of utilization circuit energy based on the relatively quasi- current in resistance property measurement of the positive inverse transformations of Fourier FFT | |
| CN107222149B (en) | Motor power factor detection system under the conditions of a kind of non-sinusoidal power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161116 Termination date: 20190513 |